10216 lines
284 KiB
C
10216 lines
284 KiB
C
/* $NetBSD: sctp_output.c,v 1.18 2018/12/22 14:28:57 maxv Exp $ */
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/* $KAME: sctp_output.c,v 1.48 2005/06/16 18:29:24 jinmei Exp $ */
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/*
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* Copyright (C) 2002, 2003, 2004 Cisco Systems Inc,
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: sctp_output.c,v 1.18 2018/12/22 14:28:57 maxv Exp $");
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#ifdef _KERNEL_OPT
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#include "opt_ipsec.h"
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#include "opt_inet.h"
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#include "opt_sctp.h"
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#endif /* _KERNEL_OPT */
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/domain.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/proc.h>
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#include <sys/kernel.h>
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#include <sys/sysctl.h>
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#include <sys/resourcevar.h>
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#include <sys/uio.h>
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#ifdef INET6
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#include <sys/domain.h>
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#endif
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#include <machine/limits.h>
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#include <machine/cpu.h>
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#include <net/if.h>
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#include <net/if_types.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/in_pcb.h>
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#include <netinet/in_var.h>
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#include <netinet/ip_var.h>
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#ifdef INET6
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#include <netinet/ip6.h>
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#include <netinet6/ip6_var.h>
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#include <netinet6/scope6_var.h>
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#include <netinet6/nd6.h>
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#include <netinet6/in6_pcb.h>
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#include <netinet/icmp6.h>
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#endif /* INET6 */
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#if defined(HAVE_NRL_INPCB) || defined(__FreeBSD__)
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#ifndef in6pcb
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#define in6pcb inpcb
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#endif
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#endif
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#include <netinet/sctp_pcb.h>
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#ifdef IPSEC
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#include <netipsec/ipsec.h>
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#include <netipsec/key.h>
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#endif /* IPSEC */
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#include <netinet/sctp_var.h>
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#include <netinet/sctp_header.h>
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#include <netinet/sctputil.h>
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#include <netinet/sctp_pcb.h>
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#include <netinet/sctp_output.h>
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#include <netinet/sctp_uio.h>
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#include <netinet/sctputil.h>
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#include <netinet/sctp_hashdriver.h>
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#include <netinet/sctp_timer.h>
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#include <netinet/sctp_asconf.h>
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#include <netinet/sctp_indata.h>
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#ifdef SCTP_DEBUG
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extern uint32_t sctp_debug_on;
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#endif
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extern int sctp_peer_chunk_oh;
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static int
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sctp_find_cmsg(int c_type, void *data, struct mbuf *control, int cpsize)
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{
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struct cmsghdr cmh;
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int tlen, at;
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tlen = control->m_len;
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at = 0;
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/*
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* Independent of how many mbufs, find the c_type inside the control
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* structure and copy out the data.
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*/
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while (at < tlen) {
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if ((tlen-at) < (int)CMSG_ALIGN(sizeof(cmh))) {
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/* not enough room for one more we are done. */
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return (0);
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}
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m_copydata(control, at, sizeof(cmh), (void *)&cmh);
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if ((cmh.cmsg_len + at) > tlen) {
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/*
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* this is real messed up since there is not enough
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* data here to cover the cmsg header. We are done.
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*/
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return (0);
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}
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if ((cmh.cmsg_level == IPPROTO_SCTP) &&
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(c_type == cmh.cmsg_type)) {
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/* found the one we want, copy it out */
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at += CMSG_ALIGN(sizeof(struct cmsghdr));
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if ((int)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < cpsize) {
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/*
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* space of cmsg_len after header not
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* big enough
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*/
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return (0);
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}
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m_copydata(control, at, cpsize, data);
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return (1);
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} else {
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at += CMSG_ALIGN(cmh.cmsg_len);
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if (cmh.cmsg_len == 0) {
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break;
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}
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}
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}
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/* not found */
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return (0);
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}
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static struct mbuf *
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sctp_add_addr_to_mbuf(struct mbuf *m, struct ifaddr *ifa)
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{
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struct sctp_paramhdr *parmh;
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struct mbuf *mret;
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int len;
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if (ifa->ifa_addr->sa_family == AF_INET) {
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len = sizeof(struct sctp_ipv4addr_param);
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} else if (ifa->ifa_addr->sa_family == AF_INET6) {
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len = sizeof(struct sctp_ipv6addr_param);
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} else {
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/* unknown type */
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return (m);
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}
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if (M_TRAILINGSPACE(m) >= len) {
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/* easy side we just drop it on the end */
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parmh = (struct sctp_paramhdr *)(m->m_data + m->m_len);
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mret = m;
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} else {
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/* Need more space */
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mret = m;
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while (mret->m_next != NULL) {
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mret = mret->m_next;
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}
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MGET(mret->m_next, M_DONTWAIT, MT_DATA);
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if (mret->m_next == NULL) {
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/* We are hosed, can't add more addresses */
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return (m);
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}
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mret = mret->m_next;
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parmh = mtod(mret, struct sctp_paramhdr *);
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}
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/* now add the parameter */
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if (ifa->ifa_addr->sa_family == AF_INET) {
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struct sctp_ipv4addr_param *ipv4p;
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struct sockaddr_in *sin;
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sin = (struct sockaddr_in *)ifa->ifa_addr;
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ipv4p = (struct sctp_ipv4addr_param *)parmh;
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parmh->param_type = htons(SCTP_IPV4_ADDRESS);
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parmh->param_length = htons(len);
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ipv4p->addr = sin->sin_addr.s_addr;
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mret->m_len += len;
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} else if (ifa->ifa_addr->sa_family == AF_INET6) {
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struct sctp_ipv6addr_param *ipv6p;
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struct sockaddr_in6 *sin6;
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sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
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ipv6p = (struct sctp_ipv6addr_param *)parmh;
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parmh->param_type = htons(SCTP_IPV6_ADDRESS);
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parmh->param_length = htons(len);
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memcpy(ipv6p->addr, &sin6->sin6_addr,
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sizeof(ipv6p->addr));
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/* clear embedded scope in the address */
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in6_clearscope((struct in6_addr *)ipv6p->addr);
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mret->m_len += len;
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} else {
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return (m);
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}
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return (mret);
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}
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static struct mbuf *
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sctp_add_cookie(struct sctp_inpcb *inp, struct mbuf *init, int init_offset,
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struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in)
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{
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struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
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struct sctp_state_cookie *stc;
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struct sctp_paramhdr *ph;
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uint8_t *signature;
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int sig_offset;
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uint16_t cookie_sz;
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mret = NULL;
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MGET(mret, M_DONTWAIT, MT_DATA);
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if (mret == NULL) {
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return (NULL);
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}
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copy_init = sctp_m_copym(init, init_offset, M_COPYALL, M_DONTWAIT);
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if (copy_init == NULL) {
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sctp_m_freem(mret);
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return (NULL);
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}
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copy_initack = sctp_m_copym(initack, initack_offset, M_COPYALL,
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M_DONTWAIT);
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if (copy_initack == NULL) {
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sctp_m_freem(mret);
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sctp_m_freem(copy_init);
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return (NULL);
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}
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/* easy side we just drop it on the end */
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ph = mtod(mret, struct sctp_paramhdr *);
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mret->m_len = sizeof(struct sctp_state_cookie) +
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sizeof(struct sctp_paramhdr);
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stc = (struct sctp_state_cookie *)((vaddr_t)ph +
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sizeof(struct sctp_paramhdr));
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ph->param_type = htons(SCTP_STATE_COOKIE);
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ph->param_length = 0; /* fill in at the end */
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/* Fill in the stc cookie data */
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*stc = *stc_in;
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/* tack the INIT and then the INIT-ACK onto the chain */
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cookie_sz = 0;
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m_at = mret;
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for (m_at = mret; m_at; m_at = m_at->m_next) {
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cookie_sz += m_at->m_len;
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if (m_at->m_next == NULL) {
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m_at->m_next = copy_init;
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break;
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}
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}
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for (m_at = copy_init; m_at; m_at = m_at->m_next) {
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cookie_sz += m_at->m_len;
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if (m_at->m_next == NULL) {
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m_at->m_next = copy_initack;
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break;
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}
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}
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for (m_at = copy_initack; m_at; m_at = m_at->m_next) {
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cookie_sz += m_at->m_len;
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if (m_at->m_next == NULL) {
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break;
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}
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}
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MGET(sig, M_DONTWAIT, MT_DATA);
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if (sig == NULL) {
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/* no space */
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sctp_m_freem(mret);
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sctp_m_freem(copy_init);
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sctp_m_freem(copy_initack);
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return (NULL);
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}
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sig->m_len = 0;
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m_at->m_next = sig;
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sig_offset = 0;
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signature = (uint8_t *)(mtod(sig, vaddr_t) + sig_offset);
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/* Time to sign the cookie */
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sctp_hash_digest_m((char *)inp->sctp_ep.secret_key[
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(int)(inp->sctp_ep.current_secret_number)],
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SCTP_SECRET_SIZE, mret, sizeof(struct sctp_paramhdr),
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(uint8_t *)signature);
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sig->m_len += SCTP_SIGNATURE_SIZE;
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cookie_sz += SCTP_SIGNATURE_SIZE;
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ph->param_length = htons(cookie_sz);
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return (mret);
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}
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static struct sockaddr_in *
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sctp_is_v4_ifa_addr_prefered (struct ifaddr *ifa, uint8_t loopscope, uint8_t ipv4_scope, uint8_t *sin_loop, uint8_t *sin_local)
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{
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struct sockaddr_in *sin;
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/*
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* Here we determine if its a prefered address. A
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* prefered address means it is the same scope or
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* higher scope then the destination.
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* L = loopback, P = private, G = global
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* -----------------------------------------
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* src | dest | result
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*-----------------------------------------
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* L | L | yes
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*-----------------------------------------
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* P | L | yes
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*-----------------------------------------
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* G | L | yes
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*-----------------------------------------
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* L | P | no
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*-----------------------------------------
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* P | P | yes
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*-----------------------------------------
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* G | P | no
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*-----------------------------------------
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* L | G | no
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*-----------------------------------------
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* P | G | no
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*-----------------------------------------
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* G | G | yes
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*-----------------------------------------
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*/
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if (ifa->ifa_addr->sa_family != AF_INET) {
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/* forget non-v4 */
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return (NULL);
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}
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/* Ok the address may be ok */
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sin = (struct sockaddr_in *)ifa->ifa_addr;
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if (sin->sin_addr.s_addr == 0) {
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return (NULL);
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}
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*sin_local = *sin_loop = 0;
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if ((ifa->ifa_ifp->if_type == IFT_LOOP) ||
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(IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
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*sin_loop = 1;
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*sin_local = 1;
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}
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if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
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*sin_local = 1;
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}
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if (!loopscope && *sin_loop) {
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/* Its a loopback address and we don't have loop scope */
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return (NULL);
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}
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if (!ipv4_scope && *sin_local) {
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/* Its a private address, and we don't have private address scope */
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return (NULL);
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}
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if (((ipv4_scope == 0) && (loopscope == 0)) && (*sin_local)) {
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/* its a global src and a private dest */
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return (NULL);
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}
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/* its a prefered address */
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return (sin);
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}
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static struct sockaddr_in *
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sctp_is_v4_ifa_addr_acceptable (struct ifaddr *ifa, uint8_t loopscope, uint8_t ipv4_scope, uint8_t *sin_loop, uint8_t *sin_local)
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{
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struct sockaddr_in *sin;
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/*
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* Here we determine if its a acceptable address. A
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* acceptable address means it is the same scope or
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* higher scope but we can allow for NAT which means
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* its ok to have a global dest and a private src.
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*
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* L = loopback, P = private, G = global
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* -----------------------------------------
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* src | dest | result
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*-----------------------------------------
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* L | L | yes
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*-----------------------------------------
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* P | L | yes
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*-----------------------------------------
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* G | L | yes
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*-----------------------------------------
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* L | P | no
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*-----------------------------------------
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* P | P | yes
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*-----------------------------------------
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* G | P | yes - probably this won't work.
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*-----------------------------------------
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* L | G | no
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*-----------------------------------------
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* P | G | yes
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*-----------------------------------------
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* G | G | yes
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*-----------------------------------------
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*/
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if (ifa->ifa_addr->sa_family != AF_INET) {
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/* forget non-v4 */
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return (NULL);
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}
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/* Ok the address may be ok */
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sin = (struct sockaddr_in *)ifa->ifa_addr;
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if (sin->sin_addr.s_addr == 0) {
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return (NULL);
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}
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*sin_local = *sin_loop = 0;
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if ((ifa->ifa_ifp->if_type == IFT_LOOP) ||
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(IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
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*sin_loop = 1;
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*sin_local = 1;
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}
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if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
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*sin_local = 1;
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}
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if (!loopscope && *sin_loop) {
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/* Its a loopback address and we don't have loop scope */
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return (NULL);
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}
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/* its an acceptable address */
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return (sin);
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}
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/*
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* This treats the address list on the ep as a restricted list
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* (negative list). If a the passed address is listed, then
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* the address is NOT allowed on the association.
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*/
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int
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sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sockaddr *addr)
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{
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struct sctp_laddr *laddr;
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#ifdef SCTP_DEBUG
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int cnt=0;
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#endif
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if (stcb == NULL) {
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/* There are no restrictions, no TCB :-) */
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return (0);
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}
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#ifdef SCTP_DEBUG
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LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
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cnt++;
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}
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if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
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printf("There are %d addresses on the restricted list\n", cnt);
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}
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cnt = 0;
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#endif
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LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
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if (laddr->ifa == NULL) {
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#ifdef SCTP_DEBUG
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if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
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printf("Help I have fallen and I can't get up!\n");
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}
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#endif
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continue;
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}
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#ifdef SCTP_DEBUG
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if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
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cnt++;
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printf("Restricted address[%d]:", cnt);
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sctp_print_address(laddr->ifa->ifa_addr);
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}
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#endif
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if (sctp_cmpaddr(addr, laddr->ifa->ifa_addr) == 1) {
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/* Yes it is on the list */
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return (1);
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}
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|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct ifaddr *ifa)
|
|
{
|
|
struct sctp_laddr *laddr;
|
|
|
|
if (ifa == NULL)
|
|
return (0);
|
|
LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
|
|
if (laddr->ifa == NULL) {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Help I have fallen and I can't get up!\n");
|
|
}
|
|
#endif
|
|
continue;
|
|
}
|
|
if (laddr->ifa->ifa_addr == NULL)
|
|
continue;
|
|
if (laddr->ifa == ifa)
|
|
/* same pointer */
|
|
return (1);
|
|
if (laddr->ifa->ifa_addr->sa_family != ifa->ifa_addr->sa_family) {
|
|
/* skip non compatible address comparison */
|
|
continue;
|
|
}
|
|
if (sctp_cmpaddr(ifa->ifa_addr, laddr->ifa->ifa_addr) == 1) {
|
|
/* Yes it is restricted */
|
|
return (1);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
|
|
|
|
static struct in_addr
|
|
sctp_choose_v4_boundspecific_inp(struct sctp_inpcb *inp,
|
|
struct rtentry *rt,
|
|
uint8_t ipv4_scope,
|
|
uint8_t loopscope)
|
|
{
|
|
struct in_addr ans;
|
|
struct sctp_laddr *laddr;
|
|
struct sockaddr_in *sin;
|
|
struct ifnet *ifn;
|
|
struct ifaddr *ifa;
|
|
uint8_t sin_loop, sin_local;
|
|
|
|
/* first question, is the ifn we will emit on
|
|
* in our list, if so, we want that one.
|
|
*/
|
|
ifn = rt->rt_ifp;
|
|
if (ifn) {
|
|
/* is a prefered one on the interface we route out? */
|
|
IFADDR_READER_FOREACH(ifa, ifn) {
|
|
sin = sctp_is_v4_ifa_addr_prefered (ifa, loopscope, ipv4_scope, &sin_loop, &sin_local);
|
|
if (sin == NULL)
|
|
continue;
|
|
if (sctp_is_addr_in_ep(inp, ifa)) {
|
|
return (sin->sin_addr);
|
|
}
|
|
}
|
|
/* is an acceptable one on the interface we route out? */
|
|
IFADDR_READER_FOREACH(ifa, ifn) {
|
|
sin = sctp_is_v4_ifa_addr_acceptable (ifa, loopscope, ipv4_scope, &sin_loop, &sin_local);
|
|
if (sin == NULL)
|
|
continue;
|
|
if (sctp_is_addr_in_ep(inp, ifa)) {
|
|
return (sin->sin_addr);
|
|
}
|
|
}
|
|
}
|
|
/* ok, what about a prefered address in the inp */
|
|
for (laddr = LIST_FIRST(&inp->sctp_addr_list);
|
|
laddr && (laddr != inp->next_addr_touse);
|
|
laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
|
|
if (laddr->ifa == NULL) {
|
|
/* address has been removed */
|
|
continue;
|
|
}
|
|
sin = sctp_is_v4_ifa_addr_prefered (laddr->ifa, loopscope, ipv4_scope, &sin_loop, &sin_local);
|
|
if (sin == NULL)
|
|
continue;
|
|
return (sin->sin_addr);
|
|
|
|
}
|
|
/* ok, what about an acceptable address in the inp */
|
|
for (laddr = LIST_FIRST(&inp->sctp_addr_list);
|
|
laddr && (laddr != inp->next_addr_touse);
|
|
laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
|
|
if (laddr->ifa == NULL) {
|
|
/* address has been removed */
|
|
continue;
|
|
}
|
|
sin = sctp_is_v4_ifa_addr_acceptable (laddr->ifa, loopscope, ipv4_scope, &sin_loop, &sin_local);
|
|
if (sin == NULL)
|
|
continue;
|
|
return (sin->sin_addr);
|
|
|
|
}
|
|
|
|
/* no address bound can be a source for the destination we are in trouble */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Src address selection for EP, no acceptable src address found for address\n");
|
|
}
|
|
#endif
|
|
memset(&ans, 0, sizeof(ans));
|
|
return (ans);
|
|
}
|
|
|
|
|
|
|
|
static struct in_addr
|
|
sctp_choose_v4_boundspecific_stcb(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb,
|
|
struct sctp_nets *net,
|
|
struct rtentry *rt,
|
|
uint8_t ipv4_scope,
|
|
uint8_t loopscope,
|
|
int non_asoc_addr_ok)
|
|
{
|
|
/*
|
|
* Here we have two cases, bound all asconf
|
|
* allowed. bound all asconf not allowed.
|
|
*
|
|
*/
|
|
struct sctp_laddr *laddr, *starting_point;
|
|
struct in_addr ans;
|
|
struct ifnet *ifn;
|
|
struct ifaddr *ifa;
|
|
uint8_t sin_loop, sin_local, start_at_beginning=0;
|
|
struct sockaddr_in *sin;
|
|
|
|
/* first question, is the ifn we will emit on
|
|
* in our list, if so, we want that one.
|
|
*/
|
|
ifn = rt->rt_ifp;
|
|
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) {
|
|
/*
|
|
* Here we use the list of addresses on the endpoint. Then
|
|
* the addresses listed on the "restricted" list is just that,
|
|
* address that have not been added and can't be used (unless
|
|
* the non_asoc_addr_ok is set).
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Have a STCB - asconf allowed, not bound all have a netgative list\n");
|
|
}
|
|
#endif
|
|
/* first question, is the ifn we will emit on
|
|
* in our list, if so, we want that one.
|
|
*/
|
|
if (ifn) {
|
|
/* first try for an prefered address on the ep */
|
|
IFADDR_READER_FOREACH(ifa, ifn) {
|
|
if (sctp_is_addr_in_ep(inp, ifa)) {
|
|
sin = sctp_is_v4_ifa_addr_prefered (ifa, loopscope, ipv4_scope, &sin_loop, &sin_local);
|
|
if (sin == NULL)
|
|
continue;
|
|
if ((non_asoc_addr_ok == 0) &&
|
|
(sctp_is_addr_restricted(stcb, (struct sockaddr *)sin))) {
|
|
/* on the no-no list */
|
|
continue;
|
|
}
|
|
return (sin->sin_addr);
|
|
}
|
|
}
|
|
/* next try for an acceptable address on the ep */
|
|
IFADDR_READER_FOREACH(ifa, ifn) {
|
|
if (sctp_is_addr_in_ep(inp, ifa)) {
|
|
sin = sctp_is_v4_ifa_addr_acceptable (ifa, loopscope, ipv4_scope, &sin_loop, &sin_local);
|
|
if (sin == NULL)
|
|
continue;
|
|
if ((non_asoc_addr_ok == 0) &&
|
|
(sctp_is_addr_restricted(stcb, (struct sockaddr *)sin))) {
|
|
/* on the no-no list */
|
|
continue;
|
|
}
|
|
return (sin->sin_addr);
|
|
}
|
|
}
|
|
|
|
}
|
|
/* if we can't find one like that then we must
|
|
* look at all addresses bound to pick one at
|
|
* first prefereable then secondly acceptable.
|
|
*/
|
|
starting_point = stcb->asoc.last_used_address;
|
|
sctpv4_from_the_top:
|
|
if (stcb->asoc.last_used_address == NULL) {
|
|
start_at_beginning=1;
|
|
stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
|
|
}
|
|
/* search beginning with the last used address */
|
|
for (laddr = stcb->asoc.last_used_address; laddr;
|
|
laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
|
|
if (laddr->ifa == NULL) {
|
|
/* address has been removed */
|
|
continue;
|
|
}
|
|
sin = sctp_is_v4_ifa_addr_prefered (laddr->ifa, loopscope, ipv4_scope, &sin_loop, &sin_local);
|
|
if (sin == NULL)
|
|
continue;
|
|
if ((non_asoc_addr_ok == 0) &&
|
|
(sctp_is_addr_restricted(stcb, (struct sockaddr *)sin))) {
|
|
/* on the no-no list */
|
|
continue;
|
|
}
|
|
return (sin->sin_addr);
|
|
|
|
}
|
|
if (start_at_beginning == 0) {
|
|
stcb->asoc.last_used_address = NULL;
|
|
goto sctpv4_from_the_top;
|
|
}
|
|
/* now try for any higher scope than the destination */
|
|
stcb->asoc.last_used_address = starting_point;
|
|
start_at_beginning = 0;
|
|
sctpv4_from_the_top2:
|
|
if (stcb->asoc.last_used_address == NULL) {
|
|
start_at_beginning=1;
|
|
stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
|
|
}
|
|
/* search beginning with the last used address */
|
|
for (laddr = stcb->asoc.last_used_address; laddr;
|
|
laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
|
|
if (laddr->ifa == NULL) {
|
|
/* address has been removed */
|
|
continue;
|
|
}
|
|
sin = sctp_is_v4_ifa_addr_acceptable (laddr->ifa, loopscope, ipv4_scope, &sin_loop, &sin_local);
|
|
if (sin == NULL)
|
|
continue;
|
|
if ((non_asoc_addr_ok == 0) &&
|
|
(sctp_is_addr_restricted(stcb, (struct sockaddr *)sin))) {
|
|
/* on the no-no list */
|
|
continue;
|
|
}
|
|
return (sin->sin_addr);
|
|
}
|
|
if (start_at_beginning == 0) {
|
|
stcb->asoc.last_used_address = NULL;
|
|
goto sctpv4_from_the_top2;
|
|
}
|
|
} else {
|
|
/*
|
|
* Here we have an address list on the association, thats the
|
|
* only valid source addresses that we can use.
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Have a STCB - no asconf allowed, not bound all have a postive list\n");
|
|
}
|
|
#endif
|
|
/* First look at all addresses for one that is on
|
|
* the interface we route out
|
|
*/
|
|
LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list,
|
|
sctp_nxt_addr) {
|
|
if (laddr->ifa == NULL) {
|
|
/* address has been removed */
|
|
continue;
|
|
}
|
|
sin = sctp_is_v4_ifa_addr_prefered (laddr->ifa, loopscope, ipv4_scope, &sin_loop, &sin_local);
|
|
if (sin == NULL)
|
|
continue;
|
|
/* first question, is laddr->ifa an address associated with the emit interface */
|
|
if (ifn) {
|
|
IFADDR_READER_FOREACH(ifa, ifn) {
|
|
if (laddr->ifa == ifa) {
|
|
sin = (struct sockaddr_in *)laddr->ifa->ifa_addr;
|
|
return (sin->sin_addr);
|
|
}
|
|
if (sctp_cmpaddr(ifa->ifa_addr, laddr->ifa->ifa_addr) == 1) {
|
|
sin = (struct sockaddr_in *)laddr->ifa->ifa_addr;
|
|
return (sin->sin_addr);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* what about an acceptable one on the interface? */
|
|
LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list,
|
|
sctp_nxt_addr) {
|
|
if (laddr->ifa == NULL) {
|
|
/* address has been removed */
|
|
continue;
|
|
}
|
|
sin = sctp_is_v4_ifa_addr_acceptable (laddr->ifa, loopscope, ipv4_scope, &sin_loop, &sin_local);
|
|
if (sin == NULL)
|
|
continue;
|
|
/* first question, is laddr->ifa an address associated with the emit interface */
|
|
if (ifn) {
|
|
IFADDR_READER_FOREACH(ifa, ifn) {
|
|
if (laddr->ifa == ifa) {
|
|
sin = (struct sockaddr_in *)laddr->ifa->ifa_addr;
|
|
return (sin->sin_addr);
|
|
}
|
|
if (sctp_cmpaddr(ifa->ifa_addr, laddr->ifa->ifa_addr) == 1) {
|
|
sin = (struct sockaddr_in *)laddr->ifa->ifa_addr;
|
|
return (sin->sin_addr);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* ok, next one that is preferable in general */
|
|
LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list,
|
|
sctp_nxt_addr) {
|
|
if (laddr->ifa == NULL) {
|
|
/* address has been removed */
|
|
continue;
|
|
}
|
|
sin = sctp_is_v4_ifa_addr_prefered (laddr->ifa, loopscope, ipv4_scope, &sin_loop, &sin_local);
|
|
if (sin == NULL)
|
|
continue;
|
|
return (sin->sin_addr);
|
|
}
|
|
|
|
/* last, what about one that is acceptable */
|
|
LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list,
|
|
sctp_nxt_addr) {
|
|
if (laddr->ifa == NULL) {
|
|
/* address has been removed */
|
|
continue;
|
|
}
|
|
sin = sctp_is_v4_ifa_addr_acceptable (laddr->ifa, loopscope, ipv4_scope, &sin_loop, &sin_local);
|
|
if (sin == NULL)
|
|
continue;
|
|
return (sin->sin_addr);
|
|
}
|
|
}
|
|
memset(&ans, 0, sizeof(ans));
|
|
return (ans);
|
|
}
|
|
|
|
static struct sockaddr_in *
|
|
sctp_select_v4_nth_prefered_addr_from_ifn_boundall (struct ifnet *ifn, struct sctp_tcb *stcb, int non_asoc_addr_ok,
|
|
uint8_t loopscope, uint8_t ipv4_scope, int cur_addr_num)
|
|
{
|
|
struct ifaddr *ifa;
|
|
struct sockaddr_in *sin;
|
|
uint8_t sin_loop, sin_local;
|
|
int num_eligible_addr = 0;
|
|
IFADDR_READER_FOREACH(ifa, ifn) {
|
|
sin = sctp_is_v4_ifa_addr_prefered (ifa, loopscope, ipv4_scope, &sin_loop, &sin_local);
|
|
if (sin == NULL)
|
|
continue;
|
|
if (stcb) {
|
|
if ((non_asoc_addr_ok == 0) && sctp_is_addr_restricted(stcb, (struct sockaddr *)sin)) {
|
|
/* It is restricted for some reason.. probably
|
|
* not yet added.
|
|
*/
|
|
continue;
|
|
}
|
|
}
|
|
if (cur_addr_num == num_eligible_addr) {
|
|
return (sin);
|
|
}
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
|
|
static int
|
|
sctp_count_v4_num_prefered_boundall (struct ifnet *ifn, struct sctp_tcb *stcb, int non_asoc_addr_ok,
|
|
uint8_t loopscope, uint8_t ipv4_scope, uint8_t *sin_loop, uint8_t *sin_local)
|
|
{
|
|
struct ifaddr *ifa;
|
|
struct sockaddr_in *sin;
|
|
int num_eligible_addr = 0;
|
|
|
|
IFADDR_READER_FOREACH(ifa, ifn) {
|
|
sin = sctp_is_v4_ifa_addr_prefered (ifa, loopscope, ipv4_scope, sin_loop, sin_local);
|
|
if (sin == NULL)
|
|
continue;
|
|
if (stcb) {
|
|
if ((non_asoc_addr_ok == 0) && sctp_is_addr_restricted(stcb, (struct sockaddr *)sin)) {
|
|
/* It is restricted for some reason.. probably
|
|
* not yet added.
|
|
*/
|
|
continue;
|
|
}
|
|
}
|
|
num_eligible_addr++;
|
|
}
|
|
return (num_eligible_addr);
|
|
|
|
}
|
|
|
|
static struct in_addr
|
|
sctp_choose_v4_boundall(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb,
|
|
struct sctp_nets *net,
|
|
struct rtentry *rt,
|
|
uint8_t ipv4_scope,
|
|
uint8_t loopscope,
|
|
int non_asoc_addr_ok)
|
|
{
|
|
int cur_addr_num=0, num_prefered=0;
|
|
uint8_t sin_loop, sin_local;
|
|
struct ifnet *ifn;
|
|
struct sockaddr_in *sin;
|
|
struct in_addr ans;
|
|
struct ifaddr *ifa;
|
|
int s;
|
|
/*
|
|
* For v4 we can use (in boundall) any address in the association. If
|
|
* non_asoc_addr_ok is set we can use any address (at least in theory).
|
|
* So we look for prefered addresses first. If we find one, we use it.
|
|
* Otherwise we next try to get an address on the interface, which we
|
|
* should be able to do (unless non_asoc_addr_ok is false and we are
|
|
* routed out that way). In these cases where we can't use the address
|
|
* of the interface we go through all the ifn's looking for an address
|
|
* we can use and fill that in. Punting means we send back address
|
|
* 0, which will probably cause problems actually since then IP will
|
|
* fill in the address of the route ifn, which means we probably already
|
|
* rejected it.. i.e. here comes an abort :-<.
|
|
*/
|
|
ifn = rt->rt_ifp;
|
|
if (net) {
|
|
cur_addr_num = net->indx_of_eligible_next_to_use;
|
|
}
|
|
if (ifn == NULL) {
|
|
goto bound_all_v4_plan_c;
|
|
}
|
|
num_prefered = sctp_count_v4_num_prefered_boundall (ifn, stcb, non_asoc_addr_ok, loopscope, ipv4_scope, &sin_loop, &sin_local);
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Found %d prefered source addresses\n", num_prefered);
|
|
}
|
|
#endif
|
|
if (num_prefered == 0) {
|
|
/* no eligible addresses, we must use some other
|
|
* interface address if we can find one.
|
|
*/
|
|
goto bound_all_v4_plan_b;
|
|
}
|
|
/* Ok we have num_eligible_addr set with how many we can use,
|
|
* this may vary from call to call due to addresses being deprecated etc..
|
|
*/
|
|
if (cur_addr_num >= num_prefered) {
|
|
cur_addr_num = 0;
|
|
}
|
|
/* select the nth address from the list (where cur_addr_num is the nth) and
|
|
* 0 is the first one, 1 is the second one etc...
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("cur_addr_num:%d\n", cur_addr_num);
|
|
}
|
|
#endif
|
|
sin = sctp_select_v4_nth_prefered_addr_from_ifn_boundall (ifn, stcb, non_asoc_addr_ok, loopscope,
|
|
ipv4_scope, cur_addr_num);
|
|
|
|
/* if sin is NULL something changed??, plan_a now */
|
|
if (sin) {
|
|
return (sin->sin_addr);
|
|
}
|
|
|
|
/*
|
|
* plan_b: Look at the interface that we emit on
|
|
* and see if we can find an acceptable address.
|
|
*/
|
|
bound_all_v4_plan_b:
|
|
IFADDR_READER_FOREACH(ifa, ifn) {
|
|
sin = sctp_is_v4_ifa_addr_acceptable (ifa, loopscope, ipv4_scope, &sin_loop, &sin_local);
|
|
if (sin == NULL)
|
|
continue;
|
|
if (stcb) {
|
|
if ((non_asoc_addr_ok == 0) && sctp_is_addr_restricted(stcb, (struct sockaddr *)sin)) {
|
|
/* It is restricted for some reason.. probably
|
|
* not yet added.
|
|
*/
|
|
continue;
|
|
}
|
|
}
|
|
return (sin->sin_addr);
|
|
}
|
|
/*
|
|
* plan_c: Look at all interfaces and find a prefered
|
|
* address. If we reache here we are in trouble I think.
|
|
*/
|
|
bound_all_v4_plan_c:
|
|
s = pserialize_read_enter();
|
|
IFNET_READER_FOREACH(ifn) {
|
|
if (ifn == inp->next_ifn_touse)
|
|
break;
|
|
if (loopscope == 0 && ifn->if_type == IFT_LOOP) {
|
|
/* wrong base scope */
|
|
continue;
|
|
}
|
|
if (ifn == rt->rt_ifp)
|
|
/* already looked at this guy */
|
|
continue;
|
|
num_prefered = sctp_count_v4_num_prefered_boundall (ifn, stcb, non_asoc_addr_ok,
|
|
loopscope, ipv4_scope, &sin_loop, &sin_local);
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Found ifn:%p %d prefered source addresses\n", ifn, num_prefered);
|
|
}
|
|
#endif
|
|
if (num_prefered == 0) {
|
|
/*
|
|
* None on this interface.
|
|
*/
|
|
continue;
|
|
}
|
|
/* Ok we have num_eligible_addr set with how many we can use,
|
|
* this may vary from call to call due to addresses being deprecated etc..
|
|
*/
|
|
if (cur_addr_num >= num_prefered) {
|
|
cur_addr_num = 0;
|
|
}
|
|
sin = sctp_select_v4_nth_prefered_addr_from_ifn_boundall (ifn, stcb, non_asoc_addr_ok, loopscope,
|
|
ipv4_scope, cur_addr_num);
|
|
if (sin == NULL)
|
|
continue;
|
|
pserialize_read_exit(s);
|
|
return (sin->sin_addr);
|
|
|
|
}
|
|
pserialize_read_exit(s);
|
|
|
|
/*
|
|
* plan_d: We are in deep trouble. No prefered address on
|
|
* any interface. And the emit interface does not
|
|
* even have an acceptable address. Take anything
|
|
* we can get! If this does not work we are
|
|
* probably going to emit a packet that will
|
|
* illicit an ABORT, falling through.
|
|
*/
|
|
|
|
s = pserialize_read_enter();
|
|
IFNET_READER_FOREACH(ifn) {
|
|
if (ifn == inp->next_ifn_touse)
|
|
break;
|
|
if (loopscope == 0 && ifn->if_type == IFT_LOOP) {
|
|
/* wrong base scope */
|
|
continue;
|
|
}
|
|
if (ifn == rt->rt_ifp)
|
|
/* already looked at this guy */
|
|
continue;
|
|
|
|
IFADDR_READER_FOREACH(ifa, ifn) {
|
|
sin = sctp_is_v4_ifa_addr_acceptable (ifa, loopscope, ipv4_scope, &sin_loop, &sin_local);
|
|
if (sin == NULL)
|
|
continue;
|
|
if (stcb) {
|
|
if ((non_asoc_addr_ok == 0) && sctp_is_addr_restricted(stcb, (struct sockaddr *)sin)) {
|
|
/* It is restricted for some reason.. probably
|
|
* not yet added.
|
|
*/
|
|
continue;
|
|
}
|
|
}
|
|
pserialize_read_exit(s);
|
|
return (sin->sin_addr);
|
|
}
|
|
}
|
|
pserialize_read_exit(s);
|
|
/*
|
|
* Ok we can find NO address to source from that is
|
|
* not on our negative list. It is either the special
|
|
* ASCONF case where we are sourceing from a intf that
|
|
* has been ifconfig'd to a different address (i.e.
|
|
* it holds a ADD/DEL/SET-PRIM and the proper lookup
|
|
* address. OR we are hosed, and this baby is going
|
|
* to abort the association.
|
|
*/
|
|
if (non_asoc_addr_ok) {
|
|
return (((struct sockaddr_in *)(rt->rt_ifa->ifa_addr))->sin_addr);
|
|
} else {
|
|
memset(&ans, 0, sizeof(ans));
|
|
return (ans);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/* tcb may be NULL */
|
|
struct in_addr
|
|
sctp_ipv4_source_address_selection(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb, struct route *ro, struct sctp_nets *net,
|
|
int non_asoc_addr_ok)
|
|
{
|
|
struct in_addr ans;
|
|
const struct sockaddr_in *to;
|
|
struct rtentry *rt;
|
|
uint8_t ipv4_scope, loopscope;
|
|
|
|
/*
|
|
* Rules:
|
|
* - Find the route if needed, cache if I can.
|
|
* - Look at interface address in route, Is it
|
|
* in the bound list. If so we have the best source.
|
|
* - If not we must rotate amongst the addresses.
|
|
*
|
|
* Cavets and issues
|
|
*
|
|
* Do we need to pay attention to scope. We can have
|
|
* a private address or a global address we are sourcing
|
|
* or sending to. So if we draw it out
|
|
* source * dest * result
|
|
* ------------------------------------------
|
|
* a Private * Global * NAT?
|
|
* ------------------------------------------
|
|
* b Private * Private * No problem
|
|
* ------------------------------------------
|
|
* c Global * Private * Huh, How will this work?
|
|
* ------------------------------------------
|
|
* d Global * Global * No Problem
|
|
* ------------------------------------------
|
|
*
|
|
* And then we add to that what happens if there are multiple
|
|
* addresses assigned to an interface. Remember the ifa on a
|
|
* ifn is a linked list of addresses. So one interface can
|
|
* have more than one IPv4 address. What happens if we
|
|
* have both a private and a global address? Do we then
|
|
* use context of destination to sort out which one is
|
|
* best? And what about NAT's sending P->G may get you
|
|
* a NAT translation, or should you select the G thats
|
|
* on the interface in preference.
|
|
*
|
|
* Decisions:
|
|
*
|
|
* - count the number of addresses on the interface.
|
|
* - if its one, no problem except case <c>. For <a>
|
|
* we will assume a NAT out there.
|
|
* - if there are more than one, then we need to worry
|
|
* about scope P or G. We should prefer G -> G and
|
|
* P -> P if possible. Then as a secondary fall back
|
|
* to mixed types G->P being a last ditch one.
|
|
* - The above all works for bound all, but bound
|
|
* specific we need to use the same concept but instead
|
|
* only consider the bound addresses. If the bound set
|
|
* is NOT assigned to the interface then we must use
|
|
* rotation amongst them.
|
|
*
|
|
* Notes: For v4, we can always punt and let ip_output
|
|
* decide by sending back a source of 0.0.0.0
|
|
*/
|
|
|
|
/*
|
|
* Need a route to cache.
|
|
*
|
|
*/
|
|
rt = rtcache_validate(ro);
|
|
if (rt == NULL) {
|
|
/* No route to host .. punt */
|
|
memset(&ans, 0, sizeof(ans));
|
|
return (ans);
|
|
} else {
|
|
to = satocsin(rtcache_getdst(ro));
|
|
}
|
|
/* Setup our scopes */
|
|
if (stcb) {
|
|
ipv4_scope = stcb->asoc.ipv4_local_scope;
|
|
loopscope = stcb->asoc.loopback_scope;
|
|
} else {
|
|
/* Scope based on outbound address */
|
|
if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
|
|
ipv4_scope = 1;
|
|
loopscope = 0;
|
|
} else if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
|
|
ipv4_scope = 1;
|
|
loopscope = 1;
|
|
} else {
|
|
ipv4_scope = 0;
|
|
loopscope = 0;
|
|
}
|
|
}
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Scope setup loop:%d ipv4_scope:%d\n",
|
|
loopscope, ipv4_scope);
|
|
}
|
|
#endif
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
|
|
/*
|
|
* When bound to all if the address list is set
|
|
* it is a negative list. Addresses being added
|
|
* by asconf.
|
|
*/
|
|
ans = sctp_choose_v4_boundall(inp, stcb, net, rt,
|
|
ipv4_scope, loopscope, non_asoc_addr_ok);
|
|
goto out;
|
|
}
|
|
/*
|
|
* Three possiblities here:
|
|
*
|
|
* a) stcb is NULL, which means we operate only from
|
|
* the list of addresses (ifa's) bound to the assoc and
|
|
* we care not about the list.
|
|
* b) stcb is NOT-NULL, which means we have an assoc structure and
|
|
* auto-asconf is on. This means that the list of addresses is
|
|
* a NOT list. We use the list from the inp, but any listed address
|
|
* in our list is NOT yet added. However if the non_asoc_addr_ok is
|
|
* set we CAN use an address NOT available (i.e. being added). Its
|
|
* a negative list.
|
|
* c) stcb is NOT-NULL, which means we have an assoc structure and
|
|
* auto-asconf is off. This means that the list of addresses is
|
|
* the ONLY addresses I can use.. its positive.
|
|
*
|
|
* Note we collapse b & c into the same function just like in
|
|
* the v6 address selection.
|
|
*/
|
|
if (stcb) {
|
|
ans = sctp_choose_v4_boundspecific_stcb(inp, stcb, net,
|
|
rt, ipv4_scope, loopscope, non_asoc_addr_ok);
|
|
goto out;
|
|
} else {
|
|
ans = sctp_choose_v4_boundspecific_inp(inp, rt,
|
|
ipv4_scope, loopscope);
|
|
goto out;
|
|
}
|
|
/* this should not be reached */
|
|
memset(&ans, 0, sizeof(ans));
|
|
out:
|
|
rtcache_unref(rt, ro);
|
|
return ans;
|
|
}
|
|
|
|
|
|
|
|
static struct sockaddr_in6 *
|
|
sctp_is_v6_ifa_addr_acceptable (struct ifaddr *ifa, int loopscope, int loc_scope, int *sin_loop, int *sin_local)
|
|
{
|
|
struct in6_ifaddr *ifa6;
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
if (ifa->ifa_addr->sa_family != AF_INET6) {
|
|
/* forget non-v6 */
|
|
return (NULL);
|
|
}
|
|
ifa6 = (struct in6_ifaddr *)ifa;
|
|
/* ok to use deprecated addresses? */
|
|
if (!ip6_use_deprecated) {
|
|
if (IFA6_IS_DEPRECATED(ifa6)) {
|
|
/* can't use this type */
|
|
return (NULL);
|
|
}
|
|
}
|
|
/* are we ok, with the current state of this address? */
|
|
if (ifa6->ia6_flags &
|
|
(IN6_IFF_DETACHED | IN6_IFF_NOTREADY | IN6_IFF_ANYCAST)) {
|
|
/* Can't use these types */
|
|
return (NULL);
|
|
}
|
|
/* Ok the address may be ok */
|
|
sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
|
|
*sin_local = *sin_loop = 0;
|
|
if ((ifa->ifa_ifp->if_type == IFT_LOOP) ||
|
|
(IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
|
|
*sin_loop = 1;
|
|
}
|
|
if (!loopscope && *sin_loop) {
|
|
/* Its a loopback address and we don't have loop scope */
|
|
return (NULL);
|
|
}
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
|
|
/* we skip unspecifed addresses */
|
|
return (NULL);
|
|
}
|
|
|
|
if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
|
|
*sin_local = 1;
|
|
}
|
|
if (!loc_scope && *sin_local) {
|
|
/* Its a link local address, and we don't have link local scope */
|
|
return (NULL);
|
|
}
|
|
return (sin6);
|
|
}
|
|
|
|
|
|
static struct sockaddr_in6 *
|
|
sctp_choose_v6_boundspecific_stcb(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb,
|
|
struct sctp_nets *net,
|
|
struct rtentry *rt,
|
|
uint8_t loc_scope,
|
|
uint8_t loopscope,
|
|
int non_asoc_addr_ok)
|
|
{
|
|
/*
|
|
* Each endpoint has a list of local addresses associated
|
|
* with it. The address list is either a "negative list" i.e.
|
|
* those addresses that are NOT allowed to be used as a source OR
|
|
* a "postive list" i.e. those addresses that CAN be used.
|
|
*
|
|
* Its a negative list if asconf is allowed. What we do
|
|
* in this case is use the ep address list BUT we have
|
|
* to cross check it against the negative list.
|
|
*
|
|
* In the case where NO asconf is allowed, we have just
|
|
* a straight association level list that we must use to
|
|
* find a source address.
|
|
*/
|
|
struct sctp_laddr *laddr, *starting_point;
|
|
struct sockaddr_in6 *sin6;
|
|
int sin_loop, sin_local;
|
|
int start_at_beginning=0;
|
|
struct ifnet *ifn;
|
|
struct ifaddr *ifa;
|
|
|
|
ifn = rt->rt_ifp;
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Have a STCB - asconf allowed, not bound all have a netgative list\n");
|
|
}
|
|
#endif
|
|
/* first question, is the ifn we will emit on
|
|
* in our list, if so, we want that one.
|
|
*/
|
|
if (ifn) {
|
|
IFADDR_READER_FOREACH(ifa, ifn) {
|
|
if (sctp_is_addr_in_ep(inp, ifa)) {
|
|
sin6 = sctp_is_v6_ifa_addr_acceptable (ifa, loopscope, loc_scope, &sin_loop, &sin_local);
|
|
if (sin6 == NULL)
|
|
continue;
|
|
if ((non_asoc_addr_ok == 0) &&
|
|
(sctp_is_addr_restricted(stcb, (struct sockaddr *)sin6))) {
|
|
/* on the no-no list */
|
|
continue;
|
|
}
|
|
return (sin6);
|
|
}
|
|
}
|
|
}
|
|
starting_point = stcb->asoc.last_used_address;
|
|
/* First try for matching scope */
|
|
sctp_from_the_top:
|
|
if (stcb->asoc.last_used_address == NULL) {
|
|
start_at_beginning=1;
|
|
stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
|
|
}
|
|
/* search beginning with the last used address */
|
|
for (laddr = stcb->asoc.last_used_address; laddr;
|
|
laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
|
|
if (laddr->ifa == NULL) {
|
|
/* address has been removed */
|
|
continue;
|
|
}
|
|
sin6 = sctp_is_v6_ifa_addr_acceptable (laddr->ifa, loopscope, loc_scope, &sin_loop, &sin_local);
|
|
if (sin6 == NULL)
|
|
continue;
|
|
if ((non_asoc_addr_ok == 0) && (sctp_is_addr_restricted(stcb, (struct sockaddr *)sin6))) {
|
|
/* on the no-no list */
|
|
continue;
|
|
}
|
|
/* is it of matching scope ? */
|
|
if ((loopscope == 0) &&
|
|
(loc_scope == 0) &&
|
|
(sin_loop == 0) &&
|
|
(sin_local == 0)) {
|
|
/* all of global scope we are ok with it */
|
|
return (sin6);
|
|
}
|
|
if (loopscope && sin_loop)
|
|
/* both on the loopback, thats ok */
|
|
return (sin6);
|
|
if (loc_scope && sin_local)
|
|
/* both local scope */
|
|
return (sin6);
|
|
|
|
}
|
|
if (start_at_beginning == 0) {
|
|
stcb->asoc.last_used_address = NULL;
|
|
goto sctp_from_the_top;
|
|
}
|
|
/* now try for any higher scope than the destination */
|
|
stcb->asoc.last_used_address = starting_point;
|
|
start_at_beginning = 0;
|
|
sctp_from_the_top2:
|
|
if (stcb->asoc.last_used_address == NULL) {
|
|
start_at_beginning=1;
|
|
stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
|
|
}
|
|
/* search beginning with the last used address */
|
|
for (laddr = stcb->asoc.last_used_address; laddr;
|
|
laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
|
|
if (laddr->ifa == NULL) {
|
|
/* address has been removed */
|
|
continue;
|
|
}
|
|
sin6 = sctp_is_v6_ifa_addr_acceptable (laddr->ifa, loopscope, loc_scope, &sin_loop, &sin_local);
|
|
if (sin6 == NULL)
|
|
continue;
|
|
if ((non_asoc_addr_ok == 0) && (sctp_is_addr_restricted(stcb, (struct sockaddr *)sin6))) {
|
|
/* on the no-no list */
|
|
continue;
|
|
}
|
|
return (sin6);
|
|
}
|
|
if (start_at_beginning == 0) {
|
|
stcb->asoc.last_used_address = NULL;
|
|
goto sctp_from_the_top2;
|
|
}
|
|
} else {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Have a STCB - no asconf allowed, not bound all have a postive list\n");
|
|
}
|
|
#endif
|
|
/* First try for interface output match */
|
|
LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list,
|
|
sctp_nxt_addr) {
|
|
if (laddr->ifa == NULL) {
|
|
/* address has been removed */
|
|
continue;
|
|
}
|
|
sin6 = sctp_is_v6_ifa_addr_acceptable (laddr->ifa, loopscope, loc_scope, &sin_loop, &sin_local);
|
|
if (sin6 == NULL)
|
|
continue;
|
|
/* first question, is laddr->ifa an address associated with the emit interface */
|
|
if (ifn) {
|
|
IFADDR_READER_FOREACH(ifa, ifn) {
|
|
if (laddr->ifa == ifa) {
|
|
sin6 = (struct sockaddr_in6 *)laddr->ifa->ifa_addr;
|
|
return (sin6);
|
|
}
|
|
if (sctp_cmpaddr(ifa->ifa_addr, laddr->ifa->ifa_addr) == 1) {
|
|
sin6 = (struct sockaddr_in6 *)laddr->ifa->ifa_addr;
|
|
return (sin6);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* Next try for matching scope */
|
|
LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list,
|
|
sctp_nxt_addr) {
|
|
if (laddr->ifa == NULL) {
|
|
/* address has been removed */
|
|
continue;
|
|
}
|
|
sin6 = sctp_is_v6_ifa_addr_acceptable (laddr->ifa, loopscope, loc_scope, &sin_loop, &sin_local);
|
|
if (sin6 == NULL)
|
|
continue;
|
|
|
|
if ((loopscope == 0) &&
|
|
(loc_scope == 0) &&
|
|
(sin_loop == 0) &&
|
|
(sin_local == 0)) {
|
|
/* all of global scope we are ok with it */
|
|
return (sin6);
|
|
}
|
|
if (loopscope && sin_loop)
|
|
/* both on the loopback, thats ok */
|
|
return (sin6);
|
|
if (loc_scope && sin_local)
|
|
/* both local scope */
|
|
return (sin6);
|
|
}
|
|
/* ok, now try for a higher scope in the source address */
|
|
/* First try for matching scope */
|
|
LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list,
|
|
sctp_nxt_addr) {
|
|
if (laddr->ifa == NULL) {
|
|
/* address has been removed */
|
|
continue;
|
|
}
|
|
sin6 = sctp_is_v6_ifa_addr_acceptable (laddr->ifa, loopscope, loc_scope, &sin_loop, &sin_local);
|
|
if (sin6 == NULL)
|
|
continue;
|
|
return (sin6);
|
|
}
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
static struct sockaddr_in6 *
|
|
sctp_choose_v6_boundspecific_inp(struct sctp_inpcb *inp,
|
|
struct rtentry *rt,
|
|
uint8_t loc_scope,
|
|
uint8_t loopscope)
|
|
{
|
|
/*
|
|
* Here we are bound specific and have only
|
|
* an inp. We must find an address that is bound
|
|
* that we can give out as a src address. We
|
|
* prefer two addresses of same scope if we can
|
|
* find them that way.
|
|
*/
|
|
struct sctp_laddr *laddr;
|
|
struct sockaddr_in6 *sin6;
|
|
struct ifnet *ifn;
|
|
struct ifaddr *ifa;
|
|
int sin_loop, sin_local;
|
|
|
|
/* first question, is the ifn we will emit on
|
|
* in our list, if so, we want that one.
|
|
*/
|
|
|
|
ifn = rt->rt_ifp;
|
|
if (ifn) {
|
|
IFADDR_READER_FOREACH(ifa, ifn) {
|
|
sin6 = sctp_is_v6_ifa_addr_acceptable (ifa, loopscope, loc_scope, &sin_loop, &sin_local);
|
|
if (sin6 == NULL)
|
|
continue;
|
|
if (sctp_is_addr_in_ep(inp, ifa)) {
|
|
return (sin6);
|
|
}
|
|
}
|
|
}
|
|
for (laddr = LIST_FIRST(&inp->sctp_addr_list);
|
|
laddr && (laddr != inp->next_addr_touse);
|
|
laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
|
|
if (laddr->ifa == NULL) {
|
|
/* address has been removed */
|
|
continue;
|
|
}
|
|
sin6 = sctp_is_v6_ifa_addr_acceptable (laddr->ifa, loopscope, loc_scope, &sin_loop, &sin_local);
|
|
if (sin6 == NULL)
|
|
continue;
|
|
|
|
if ((loopscope == 0) &&
|
|
(loc_scope == 0) &&
|
|
(sin_loop == 0) &&
|
|
(sin_local == 0)) {
|
|
/* all of global scope we are ok with it */
|
|
return (sin6);
|
|
}
|
|
if (loopscope && sin_loop)
|
|
/* both on the loopback, thats ok */
|
|
return (sin6);
|
|
if (loc_scope && sin_local)
|
|
/* both local scope */
|
|
return (sin6);
|
|
|
|
}
|
|
/* if we reach here, we could not find two addresses
|
|
* of the same scope to give out. Lets look for any higher level
|
|
* scope for a source address.
|
|
*/
|
|
for (laddr = LIST_FIRST(&inp->sctp_addr_list);
|
|
laddr && (laddr != inp->next_addr_touse);
|
|
laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
|
|
if (laddr->ifa == NULL) {
|
|
/* address has been removed */
|
|
continue;
|
|
}
|
|
sin6 = sctp_is_v6_ifa_addr_acceptable (laddr->ifa, loopscope, loc_scope, &sin_loop, &sin_local);
|
|
if (sin6 == NULL)
|
|
continue;
|
|
return (sin6);
|
|
}
|
|
/* no address bound can be a source for the destination */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Src address selection for EP, no acceptable src address found for address\n");
|
|
}
|
|
#endif
|
|
return (NULL);
|
|
}
|
|
|
|
|
|
static struct sockaddr_in6 *
|
|
sctp_select_v6_nth_addr_from_ifn_boundall (struct ifnet *ifn, struct sctp_tcb *stcb, int non_asoc_addr_ok, uint8_t loopscope,
|
|
uint8_t loc_scope, int cur_addr_num, int match_scope)
|
|
{
|
|
struct ifaddr *ifa;
|
|
struct sockaddr_in6 *sin6;
|
|
int sin_loop, sin_local;
|
|
int num_eligible_addr = 0;
|
|
|
|
IFADDR_READER_FOREACH(ifa, ifn) {
|
|
sin6 = sctp_is_v6_ifa_addr_acceptable (ifa, loopscope, loc_scope, &sin_loop, &sin_local);
|
|
if (sin6 == NULL)
|
|
continue;
|
|
if (stcb) {
|
|
if ((non_asoc_addr_ok == 0) && sctp_is_addr_restricted(stcb, (struct sockaddr *)sin6)) {
|
|
/* It is restricted for some reason.. probably
|
|
* not yet added.
|
|
*/
|
|
continue;
|
|
}
|
|
}
|
|
if (match_scope) {
|
|
/* Here we are asked to match scope if possible */
|
|
if (loopscope && sin_loop)
|
|
/* src and destination are loopback scope */
|
|
return (sin6);
|
|
if (loc_scope && sin_local)
|
|
/* src and destination are local scope */
|
|
return (sin6);
|
|
if ((loopscope == 0) &&
|
|
(loc_scope == 0) &&
|
|
(sin_loop == 0) &&
|
|
(sin_local == 0)) {
|
|
/* src and destination are global scope */
|
|
return (sin6);
|
|
}
|
|
continue;
|
|
}
|
|
if (num_eligible_addr == cur_addr_num) {
|
|
/* this is it */
|
|
return (sin6);
|
|
}
|
|
num_eligible_addr++;
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
|
|
static int
|
|
sctp_count_v6_num_eligible_boundall (struct ifnet *ifn, struct sctp_tcb *stcb,
|
|
int non_asoc_addr_ok, uint8_t loopscope, uint8_t loc_scope)
|
|
{
|
|
struct ifaddr *ifa;
|
|
struct sockaddr_in6 *sin6;
|
|
int num_eligible_addr = 0;
|
|
int sin_loop, sin_local;
|
|
|
|
IFADDR_READER_FOREACH(ifa, ifn) {
|
|
sin6 = sctp_is_v6_ifa_addr_acceptable (ifa, loopscope, loc_scope, &sin_loop, &sin_local);
|
|
if (sin6 == NULL)
|
|
continue;
|
|
if (stcb) {
|
|
if ((non_asoc_addr_ok == 0) && sctp_is_addr_restricted(stcb, (struct sockaddr *)sin6)) {
|
|
/* It is restricted for some reason.. probably
|
|
* not yet added.
|
|
*/
|
|
continue;
|
|
}
|
|
}
|
|
num_eligible_addr++;
|
|
}
|
|
return (num_eligible_addr);
|
|
}
|
|
|
|
|
|
static struct sockaddr_in6 *
|
|
sctp_choose_v6_boundall(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb,
|
|
struct sctp_nets *net,
|
|
struct rtentry *rt,
|
|
uint8_t loc_scope,
|
|
uint8_t loopscope,
|
|
int non_asoc_addr_ok)
|
|
{
|
|
/* Ok, we are bound all SO any address
|
|
* is ok to use as long as it is NOT in the negative
|
|
* list.
|
|
*/
|
|
int num_eligible_addr;
|
|
int cur_addr_num=0;
|
|
int started_at_beginning=0;
|
|
int match_scope_prefered;
|
|
/* first question is, how many eligible addresses are
|
|
* there for the destination ifn that we are using that
|
|
* are within the proper scope?
|
|
*/
|
|
struct ifnet *ifn;
|
|
struct sockaddr_in6 *sin6;
|
|
int s;
|
|
|
|
ifn = rt->rt_ifp;
|
|
if (net) {
|
|
cur_addr_num = net->indx_of_eligible_next_to_use;
|
|
}
|
|
if (cur_addr_num == 0) {
|
|
match_scope_prefered = 1;
|
|
} else {
|
|
match_scope_prefered = 0;
|
|
}
|
|
num_eligible_addr = sctp_count_v6_num_eligible_boundall (ifn, stcb, non_asoc_addr_ok, loopscope, loc_scope);
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Found %d eligible source addresses\n", num_eligible_addr);
|
|
}
|
|
#endif
|
|
if (num_eligible_addr == 0) {
|
|
/* no eligible addresses, we must use some other
|
|
* interface address if we can find one.
|
|
*/
|
|
goto bound_all_v6_plan_b;
|
|
}
|
|
/* Ok we have num_eligible_addr set with how many we can use,
|
|
* this may vary from call to call due to addresses being deprecated etc..
|
|
*/
|
|
if (cur_addr_num >= num_eligible_addr) {
|
|
cur_addr_num = 0;
|
|
}
|
|
/* select the nth address from the list (where cur_addr_num is the nth) and
|
|
* 0 is the first one, 1 is the second one etc...
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("cur_addr_num:%d match_scope_prefered:%d select it\n",
|
|
cur_addr_num, match_scope_prefered);
|
|
}
|
|
#endif
|
|
sin6 = sctp_select_v6_nth_addr_from_ifn_boundall (ifn, stcb, non_asoc_addr_ok, loopscope,
|
|
loc_scope, cur_addr_num, match_scope_prefered);
|
|
if (match_scope_prefered && (sin6 == NULL)) {
|
|
/* retry without the preference for matching scope */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("retry with no match_scope_prefered\n");
|
|
}
|
|
#endif
|
|
sin6 = sctp_select_v6_nth_addr_from_ifn_boundall (ifn, stcb, non_asoc_addr_ok, loopscope,
|
|
loc_scope, cur_addr_num, 0);
|
|
}
|
|
if (sin6) {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Selected address %d ifn:%p for the route\n", cur_addr_num, ifn);
|
|
}
|
|
#endif
|
|
if (net) {
|
|
/* store so we get the next one */
|
|
if (cur_addr_num < 255)
|
|
net->indx_of_eligible_next_to_use = cur_addr_num + 1;
|
|
else
|
|
net->indx_of_eligible_next_to_use = 0;
|
|
}
|
|
return (sin6);
|
|
}
|
|
num_eligible_addr = 0;
|
|
bound_all_v6_plan_b:
|
|
/* ok, if we reach here we either fell through
|
|
* due to something changing during an interrupt (unlikely)
|
|
* or we have NO eligible source addresses for the ifn
|
|
* of the route (most likely). We must look at all the other
|
|
* interfaces EXCEPT rt->rt_ifp and do the same game.
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("bound-all Plan B\n");
|
|
}
|
|
#endif
|
|
if (inp->next_ifn_touse == NULL) {
|
|
started_at_beginning=1;
|
|
inp->next_ifn_touse = IFNET_READER_FIRST();
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Start at first IFN:%p\n", inp->next_ifn_touse);
|
|
}
|
|
#endif
|
|
} else {
|
|
inp->next_ifn_touse = IFNET_READER_NEXT(inp->next_ifn_touse);
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Resume at IFN:%p\n", inp->next_ifn_touse);
|
|
}
|
|
#endif
|
|
if (inp->next_ifn_touse == NULL) {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("IFN Resets\n");
|
|
}
|
|
#endif
|
|
started_at_beginning=1;
|
|
inp->next_ifn_touse = IFNET_READER_FIRST();
|
|
}
|
|
}
|
|
|
|
s = pserialize_read_enter();
|
|
IFNET_READER_FOREACH(ifn) {
|
|
if (loopscope == 0 && ifn->if_type == IFT_LOOP) {
|
|
/* wrong base scope */
|
|
continue;
|
|
}
|
|
if (loc_scope && (ifn->if_index != loc_scope)) {
|
|
/* by definition the scope (from to->sin6_scopeid)
|
|
* must match that of the interface. If not then
|
|
* we could pick a wrong scope for the address.
|
|
* Ususally we don't hit plan-b since the route
|
|
* handles this. However we can hit plan-b when
|
|
* we send to local-host so the route is the
|
|
* loopback interface, but the destination is a
|
|
* link local.
|
|
*/
|
|
continue;
|
|
}
|
|
if (ifn == rt->rt_ifp) {
|
|
/* already looked at this guy */
|
|
continue;
|
|
}
|
|
/* Address rotation will only work when we are not
|
|
* rotating sourced interfaces and are using the interface
|
|
* of the route. We would need to have a per interface index
|
|
* in order to do proper rotation.
|
|
*/
|
|
num_eligible_addr = sctp_count_v6_num_eligible_boundall (ifn, stcb, non_asoc_addr_ok, loopscope, loc_scope);
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("IFN:%p has %d eligible\n", ifn, num_eligible_addr);
|
|
}
|
|
#endif
|
|
if (num_eligible_addr == 0) {
|
|
/* none we can use */
|
|
continue;
|
|
}
|
|
/* Ok we have num_eligible_addr set with how many we can use,
|
|
* this may vary from call to call due to addresses being deprecated etc..
|
|
*/
|
|
inp->next_ifn_touse = ifn;
|
|
|
|
/* select the first one we can find with perference for matching scope.
|
|
*/
|
|
sin6 = sctp_select_v6_nth_addr_from_ifn_boundall (ifn, stcb, non_asoc_addr_ok, loopscope, loc_scope, 0, 1);
|
|
if (sin6 == NULL) {
|
|
/* can't find one with matching scope how about a source with higher
|
|
* scope
|
|
*/
|
|
sin6 = sctp_select_v6_nth_addr_from_ifn_boundall (ifn, stcb, non_asoc_addr_ok, loopscope, loc_scope, 0, 0);
|
|
if (sin6 == NULL)
|
|
/* Hmm, can't find one in the interface now */
|
|
continue;
|
|
}
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Selected the %d'th address of ifn:%p\n",
|
|
cur_addr_num, ifn);
|
|
}
|
|
#endif
|
|
pserialize_read_exit(s);
|
|
return (sin6);
|
|
}
|
|
pserialize_read_exit(s);
|
|
|
|
if (started_at_beginning == 0) {
|
|
/* we have not been through all of them yet, force
|
|
* us to go through them all.
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Force a recycle\n");
|
|
}
|
|
#endif
|
|
inp->next_ifn_touse = NULL;
|
|
goto bound_all_v6_plan_b;
|
|
}
|
|
return (NULL);
|
|
|
|
}
|
|
|
|
/* stcb and net may be NULL */
|
|
struct in6_addr
|
|
sctp_ipv6_source_address_selection(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb, struct route *ro, struct sctp_nets *net,
|
|
int non_asoc_addr_ok)
|
|
{
|
|
struct in6_addr ans;
|
|
struct sockaddr_in6 *rt_addr;
|
|
uint8_t loc_scope, loopscope;
|
|
struct sockaddr_in6 to;
|
|
struct rtentry *rt;
|
|
|
|
/*
|
|
* This routine is tricky standard v6 src address
|
|
* selection cannot take into account what we have
|
|
* bound etc, so we can't use it.
|
|
*
|
|
* Instead here is what we must do:
|
|
* 1) Make sure we have a route, if we
|
|
* don't have a route we can never reach the peer.
|
|
* 2) Once we have a route, determine the scope of the
|
|
* route. Link local, loopback or global.
|
|
* 3) Next we divide into three types. Either we
|
|
* are bound all.. which means we want to use
|
|
* one of the addresses of the interface we are
|
|
* going out. <or>
|
|
* 4a) We have not stcb, which means we are using the
|
|
* specific addresses bound on an inp, in this
|
|
* case we are similar to the stcb case (4b below)
|
|
* accept the list is always a positive list.<or>
|
|
* 4b) We are bound specific with a stcb, which means we have a
|
|
* list of bound addresses and we must see if the
|
|
* ifn of the route is actually one of the bound addresses.
|
|
* If not, then we must rotate addresses amongst properly
|
|
* scoped bound addresses, if so we use the address
|
|
* of the interface.
|
|
* 5) Always, no matter which path we take through the above
|
|
* we must be sure the source address we use is allowed to
|
|
* be used. I.e. IN6_IFF_DETACHED, IN6_IFF_NOTREADY, and IN6_IFF_ANYCAST
|
|
* addresses cannot be used.
|
|
* 6) Addresses that are deprecated MAY be used
|
|
* if (!ip6_use_deprecated) {
|
|
* if (IFA6_IS_DEPRECATED(ifa6)) {
|
|
* skip the address
|
|
* }
|
|
* }
|
|
*/
|
|
|
|
/*** 1> determine route, if not already done */
|
|
rt = rtcache_validate(ro);
|
|
if (rt == NULL) {
|
|
/*
|
|
* Need a route to cache.
|
|
*/
|
|
int scope_save;
|
|
|
|
memcpy(&to, rtcache_getdst(ro), sizeof(struct sockaddr));
|
|
scope_save = to.sin6_scope_id;
|
|
to.sin6_scope_id = 0;
|
|
|
|
rt = rtcache_lookup(ro, (struct sockaddr *)&to);
|
|
to.sin6_scope_id = scope_save;
|
|
}
|
|
if (rt == NULL) {
|
|
/*
|
|
* no route to host. this packet is going no-where.
|
|
* We probably should make sure we arrange to send back
|
|
* an error.
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("No route to host, this packet cannot be sent!\n");
|
|
}
|
|
#endif
|
|
memset(&ans, 0, sizeof(ans));
|
|
return (ans);
|
|
}
|
|
|
|
/*** 2a> determine scope for outbound address/route */
|
|
loc_scope = loopscope = 0;
|
|
/*
|
|
* We base our scope on the outbound packet scope and route,
|
|
* NOT the TCB (if there is one). This way in local scope we will only
|
|
* use a local scope src address when we send to a local address.
|
|
*/
|
|
|
|
if (IN6_IS_ADDR_LOOPBACK(&to.sin6_addr)) {
|
|
/* If the route goes to the loopback address OR
|
|
* the address is a loopback address, we are loopback
|
|
* scope.
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Loopback scope is set\n");
|
|
}
|
|
#endif
|
|
loc_scope = 0;
|
|
loopscope = 1;
|
|
if (net != NULL) {
|
|
/* mark it as local */
|
|
net->addr_is_local = 1;
|
|
}
|
|
|
|
} else if (IN6_IS_ADDR_LINKLOCAL(&to.sin6_addr)) {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Link local scope is set, id:%d\n", to.sin6_scope_id);
|
|
}
|
|
#endif
|
|
if (to.sin6_scope_id)
|
|
loc_scope = to.sin6_scope_id;
|
|
else {
|
|
loc_scope = 1;
|
|
}
|
|
loopscope = 0;
|
|
} else {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Global scope is set\n");
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/* now, depending on which way we are bound we call the appropriate
|
|
* routine to do steps 3-6
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Destination address:");
|
|
sctp_print_address((struct sockaddr *)&to);
|
|
}
|
|
#endif
|
|
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Calling bound-all src addr selection for v6\n");
|
|
}
|
|
#endif
|
|
rt_addr = sctp_choose_v6_boundall(inp, stcb, net, rt, loc_scope, loopscope, non_asoc_addr_ok);
|
|
} else {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Calling bound-specific src addr selection for v6\n");
|
|
}
|
|
#endif
|
|
if (stcb)
|
|
rt_addr = sctp_choose_v6_boundspecific_stcb(inp, stcb, net, rt, loc_scope, loopscope, non_asoc_addr_ok);
|
|
else
|
|
/* we can't have a non-asoc address since we have no association */
|
|
rt_addr = sctp_choose_v6_boundspecific_inp(inp, rt, loc_scope, loopscope);
|
|
}
|
|
rtcache_unref(rt, ro);
|
|
if (rt_addr == NULL) {
|
|
/* no suitable address? */
|
|
struct in6_addr in6;
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("V6 packet will reach dead-end no suitable src address\n");
|
|
}
|
|
#endif
|
|
memset(&in6, 0, sizeof(in6));
|
|
return (in6);
|
|
}
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Source address selected is:");
|
|
sctp_print_address((struct sockaddr *)rt_addr);
|
|
}
|
|
#endif
|
|
return (rt_addr->sin6_addr);
|
|
}
|
|
|
|
static uint8_t
|
|
sctp_get_ect(struct sctp_tcb *stcb,
|
|
struct sctp_tmit_chunk *chk)
|
|
{
|
|
uint8_t this_random;
|
|
|
|
/* Huh? */
|
|
if (sctp_ecn == 0)
|
|
return (0);
|
|
|
|
if (sctp_ecn_nonce == 0)
|
|
/* no nonce, always return ECT0 */
|
|
return (SCTP_ECT0_BIT);
|
|
|
|
if (stcb->asoc.peer_supports_ecn_nonce == 0) {
|
|
/* Peer does NOT support it, so we send a ECT0 only */
|
|
return (SCTP_ECT0_BIT);
|
|
}
|
|
|
|
if (chk == NULL)
|
|
return (SCTP_ECT0_BIT);
|
|
|
|
if (((stcb->asoc.hb_random_idx == 3) &&
|
|
(stcb->asoc.hb_ect_randombit > 7)) ||
|
|
(stcb->asoc.hb_random_idx > 3)) {
|
|
uint32_t rndval;
|
|
rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
|
|
memcpy(stcb->asoc.hb_random_values, &rndval,
|
|
sizeof(stcb->asoc.hb_random_values));
|
|
this_random = stcb->asoc.hb_random_values[0];
|
|
stcb->asoc.hb_random_idx = 0;
|
|
stcb->asoc.hb_ect_randombit = 0;
|
|
} else {
|
|
if (stcb->asoc.hb_ect_randombit > 7) {
|
|
stcb->asoc.hb_ect_randombit = 0;
|
|
stcb->asoc.hb_random_idx++;
|
|
}
|
|
this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx];
|
|
}
|
|
if ((this_random >> stcb->asoc.hb_ect_randombit) & 0x01) {
|
|
if (chk != NULL)
|
|
/* ECN Nonce stuff */
|
|
chk->rec.data.ect_nonce = SCTP_ECT1_BIT;
|
|
stcb->asoc.hb_ect_randombit++;
|
|
return (SCTP_ECT1_BIT);
|
|
} else {
|
|
stcb->asoc.hb_ect_randombit++;
|
|
return (SCTP_ECT0_BIT);
|
|
}
|
|
}
|
|
|
|
extern int sctp_no_csum_on_loopback;
|
|
|
|
static int
|
|
sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb, /* may be NULL */
|
|
struct sctp_nets *net,
|
|
const struct sockaddr *to,
|
|
struct mbuf *m,
|
|
int nofragment_flag,
|
|
int ecn_ok,
|
|
struct sctp_tmit_chunk *chk,
|
|
int out_of_asoc_ok)
|
|
/* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
|
|
{
|
|
/*
|
|
* Given a mbuf chain (via m_next) that holds a packet header
|
|
* WITH a SCTPHDR but no IP header, endpoint inp and sa structure.
|
|
* - calculate SCTP checksum and fill in
|
|
* - prepend a IP address header
|
|
* - if boundall use INADDR_ANY
|
|
* - if boundspecific do source address selection
|
|
* - set fragmentation option for ipV4
|
|
* - On return from IP output, check/adjust mtu size
|
|
* - of output interface and smallest_mtu size as well.
|
|
*/
|
|
struct sctphdr *sctphdr;
|
|
int o_flgs;
|
|
uint32_t csum;
|
|
int ret;
|
|
unsigned int have_mtu;
|
|
struct route *ro;
|
|
struct rtentry *rt;
|
|
|
|
if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
|
|
sctp_m_freem(m);
|
|
return (EFAULT);
|
|
}
|
|
if ((m->m_flags & M_PKTHDR) == 0) {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Software error: sctp_lowlevel_chunk_output() called with non pkthdr!\n");
|
|
}
|
|
#endif
|
|
sctp_m_freem(m);
|
|
return (EFAULT);
|
|
}
|
|
/* Calculate the csum and fill in the length of the packet */
|
|
sctphdr = mtod(m, struct sctphdr *);
|
|
have_mtu = 0;
|
|
if (sctp_no_csum_on_loopback &&
|
|
(stcb) &&
|
|
(stcb->asoc.loopback_scope)) {
|
|
sctphdr->checksum = 0;
|
|
m->m_pkthdr.len = sctp_calculate_len(m);
|
|
} else {
|
|
sctphdr->checksum = 0;
|
|
csum = sctp_calculate_sum(m, &m->m_pkthdr.len, 0);
|
|
sctphdr->checksum = csum;
|
|
}
|
|
if (to->sa_family == AF_INET) {
|
|
struct ip *ip;
|
|
static struct route iproute;
|
|
M_PREPEND(m, sizeof(struct ip), M_DONTWAIT);
|
|
if (m == NULL) {
|
|
/* failed to prepend data, give up */
|
|
return (ENOMEM);
|
|
}
|
|
ip = mtod(m, struct ip *);
|
|
ip->ip_v = IPVERSION;
|
|
ip->ip_hl = (sizeof(struct ip) >> 2);
|
|
if (nofragment_flag) {
|
|
ip->ip_off = htons(IP_DF);
|
|
} else
|
|
ip->ip_off = 0;
|
|
|
|
ip->ip_id = htons(ip_newid(NULL));
|
|
ip->ip_ttl = inp->inp_ip_ttl;
|
|
ip->ip_len = htons(m->m_pkthdr.len);
|
|
if (stcb) {
|
|
if ((stcb->asoc.ecn_allowed) && ecn_ok) {
|
|
/* Enable ECN */
|
|
ip->ip_tos = (u_char)((inp->ip_inp.inp.inp_ip.ip_tos & 0x000000fc) |
|
|
sctp_get_ect(stcb, chk));
|
|
} else {
|
|
/* No ECN */
|
|
ip->ip_tos = inp->ip_inp.inp.inp_ip.ip_tos;
|
|
}
|
|
} else {
|
|
/* no association at all */
|
|
ip->ip_tos = inp->inp_ip_tos;
|
|
}
|
|
ip->ip_p = IPPROTO_SCTP;
|
|
ip->ip_sum = 0;
|
|
#ifdef SCTP_DEBUG
|
|
printf("chunk_output: net %p\n", net);
|
|
#endif
|
|
if (net == NULL) {
|
|
ro = &iproute;
|
|
memset(&iproute, 0, sizeof(iproute));
|
|
/* XXX */
|
|
rt = rtcache_lookup(ro, to);
|
|
rtcache_unref(rt, ro);
|
|
} else {
|
|
ro = (struct route *)&net->ro;
|
|
}
|
|
/* Now the address selection part */
|
|
ip->ip_dst.s_addr = satocsin(to)->sin_addr.s_addr;
|
|
|
|
/* call the routine to select the src address */
|
|
if (net) {
|
|
if (net->src_addr_selected == 0) {
|
|
/* Cache the source address */
|
|
((struct sockaddr_in *)&net->_s_addr)->sin_addr = sctp_ipv4_source_address_selection(inp,
|
|
stcb,
|
|
ro, net, out_of_asoc_ok);
|
|
rt = rtcache_validate(ro);
|
|
if (rt != NULL) {
|
|
net->src_addr_selected = 1;
|
|
}
|
|
rtcache_unref(rt, ro);
|
|
}
|
|
ip->ip_src = ((struct sockaddr_in *)&net->_s_addr)->sin_addr;
|
|
} else {
|
|
ip->ip_src = sctp_ipv4_source_address_selection(inp,
|
|
stcb, ro, net, out_of_asoc_ok);
|
|
}
|
|
#ifdef SCTP_DEBUG
|
|
printf("src addr %x\n", ip->ip_src.s_addr);
|
|
#endif
|
|
/*
|
|
* If source address selection fails and we find no route then
|
|
* the ip_ouput should fail as well with a NO_ROUTE_TO_HOST
|
|
* type error. We probably should catch that somewhere and
|
|
* abort the association right away (assuming this is an INIT
|
|
* being sent).
|
|
*/
|
|
rt = rtcache_validate(ro);
|
|
if (rt == NULL) {
|
|
/*
|
|
* src addr selection failed to find a route (or valid
|
|
* source addr), so we can't get there from here!
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("low_level_output: dropped v4 packet- no valid source addr\n");
|
|
printf("Destination was %x\n", (u_int)(ntohl(ip->ip_dst.s_addr)));
|
|
}
|
|
#endif /* SCTP_DEBUG */
|
|
if (net) {
|
|
if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb)
|
|
sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
|
|
stcb,
|
|
SCTP_FAILED_THRESHOLD,
|
|
(void *)net);
|
|
net->dest_state &= ~SCTP_ADDR_REACHABLE;
|
|
net->dest_state |= SCTP_ADDR_NOT_REACHABLE;
|
|
if (stcb) {
|
|
if (net == stcb->asoc.primary_destination) {
|
|
/* need a new primary */
|
|
struct sctp_nets *alt;
|
|
alt = sctp_find_alternate_net(stcb, net);
|
|
if (alt != net) {
|
|
if (sctp_set_primary_addr(stcb,
|
|
(struct sockaddr *)NULL,
|
|
alt) == 0) {
|
|
net->dest_state |= SCTP_ADDR_WAS_PRIMARY;
|
|
net->src_addr_selected = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
sctp_m_freem(m);
|
|
return (EHOSTUNREACH);
|
|
} else {
|
|
have_mtu = rt->rt_ifp->if_mtu;
|
|
}
|
|
|
|
o_flgs = (IP_RAWOUTPUT | (inp->sctp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST)));
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("Calling ipv4 output routine from low level src addr:%x\n",
|
|
(u_int)(ntohl(ip->ip_src.s_addr)));
|
|
printf("Destination is %x\n", (u_int)(ntohl(ip->ip_dst.s_addr)));
|
|
printf("RTP route is %p through\n", rt);
|
|
printf("length %d\n", ntohs(ip->ip_len));
|
|
}
|
|
#endif
|
|
if ((have_mtu) && (net) && (have_mtu > net->mtu)) {
|
|
rt->rt_ifp->if_mtu = net->mtu;
|
|
}
|
|
ret = ip_output(m, inp->ip_inp.inp.inp_options,
|
|
ro, o_flgs, inp->ip_inp.inp.inp_moptions,
|
|
&inp->ip_inp.inp);
|
|
if ((rt) && (have_mtu) && (net) && (have_mtu > net->mtu)) {
|
|
rt->rt_ifp->if_mtu = have_mtu;
|
|
}
|
|
sctp_pegs[SCTP_DATAGRAMS_SENT]++;
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("Ip output returns %d\n", ret);
|
|
}
|
|
#endif
|
|
if (net == NULL) {
|
|
} else {
|
|
/* PMTU check versus smallest asoc MTU goes here */
|
|
if (rt != NULL) {
|
|
if (rt->rt_rmx.rmx_mtu &&
|
|
(stcb->asoc.smallest_mtu > rt->rt_rmx.rmx_mtu)) {
|
|
sctp_mtu_size_reset(inp, &stcb->asoc,
|
|
rt->rt_rmx.rmx_mtu);
|
|
}
|
|
} else {
|
|
/* route was freed */
|
|
net->src_addr_selected = 0;
|
|
}
|
|
}
|
|
rtcache_unref(rt, ro);
|
|
return (ret);
|
|
}
|
|
#ifdef INET6
|
|
else if (to->sa_family == AF_INET6) {
|
|
struct ip6_hdr *ip6h;
|
|
static struct route ip6route;
|
|
struct ifnet *ifp;
|
|
u_char flowTop;
|
|
uint16_t flowBottom;
|
|
u_char tosBottom, tosTop;
|
|
struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
|
|
int prev_scope=0;
|
|
u_short prev_port=0;
|
|
|
|
M_PREPEND(m, sizeof(struct ip6_hdr), M_DONTWAIT);
|
|
if (m == NULL) {
|
|
/* failed to prepend data, give up */
|
|
return (ENOMEM);
|
|
}
|
|
ip6h = mtod(m, struct ip6_hdr *);
|
|
|
|
/*
|
|
* We assume here that inp_flow is in host byte order within
|
|
* the TCB!
|
|
*/
|
|
flowBottom = ((struct in6pcb *)inp)->in6p_flowinfo & 0x0000ffff;
|
|
flowTop = ((((struct in6pcb *)inp)->in6p_flowinfo & 0x000f0000) >> 16);
|
|
|
|
tosTop = (((((struct in6pcb *)inp)->in6p_flowinfo & 0xf0) >> 4) | IPV6_VERSION);
|
|
|
|
/* protect *sin6 from overwrite */
|
|
memcpy(&tmp, to, sizeof(struct sockaddr_in6));
|
|
sin6 = &tmp;
|
|
|
|
/* KAME hack: embed scopeid */
|
|
#if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__)
|
|
if (in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL) != 0)
|
|
#else
|
|
/*
|
|
* XXX: appropriate scope zone must be provided or otherwise
|
|
* ip6_use_defzone must be 1.
|
|
*/
|
|
if (sa6_embedscope(sin6, ip6_use_defzone) != 0)
|
|
#endif
|
|
return (EINVAL);
|
|
if (net == NULL) {
|
|
memset(&ip6route, 0, sizeof(ip6route));
|
|
ro = (struct route *)&ip6route;
|
|
/* XXX */
|
|
rt = rtcache_lookup(ro, (struct sockaddr *) sin6);
|
|
rtcache_unref(rt, ro);
|
|
} else {
|
|
ro = (struct route *)&net->ro;
|
|
}
|
|
if (stcb != NULL) {
|
|
if ((stcb->asoc.ecn_allowed) && ecn_ok) {
|
|
/* Enable ECN */
|
|
tosBottom = (((((struct in6pcb *)inp)->in6p_flowinfo & 0x0c) | sctp_get_ect(stcb, chk)) << 4);
|
|
} else {
|
|
/* No ECN */
|
|
tosBottom = ((((struct in6pcb *)inp)->in6p_flowinfo & 0x0c) << 4);
|
|
}
|
|
} else {
|
|
/* we could get no asoc if it is a O-O-T-B packet */
|
|
tosBottom = ((((struct in6pcb *)inp)->in6p_flowinfo & 0x0c) << 4);
|
|
}
|
|
ip6h->ip6_flow = htonl(((tosTop << 24) | ((tosBottom|flowTop) << 16) | flowBottom));
|
|
ip6h->ip6_nxt = IPPROTO_SCTP;
|
|
ip6h->ip6_plen = m->m_pkthdr.len;
|
|
ip6h->ip6_dst = sin6->sin6_addr;
|
|
|
|
/*
|
|
* Add SRC address selection here:
|
|
* we can only reuse to a limited degree the kame src-addr-sel,
|
|
* since we can try their selection but it may not be bound.
|
|
*/
|
|
memset(&lsa6_tmp, 0, sizeof(lsa6_tmp));
|
|
lsa6_tmp.sin6_family = AF_INET6;
|
|
lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
|
|
lsa6 = &lsa6_tmp;
|
|
rt = rtcache_validate(ro);
|
|
if (net) {
|
|
if (net->src_addr_selected == 0) {
|
|
/* Cache the source address */
|
|
((struct sockaddr_in6 *)&net->_s_addr)->sin6_addr = sctp_ipv6_source_address_selection(inp,
|
|
stcb, ro, net, out_of_asoc_ok);
|
|
|
|
if (rt != NULL) {
|
|
net->src_addr_selected = 1;
|
|
}
|
|
}
|
|
lsa6->sin6_addr = ((struct sockaddr_in6 *)&net->_s_addr)->sin6_addr;
|
|
} else {
|
|
lsa6->sin6_addr = sctp_ipv6_source_address_selection(
|
|
inp, stcb, ro, net, out_of_asoc_ok);
|
|
}
|
|
lsa6->sin6_port = inp->sctp_lport;
|
|
|
|
if (rt == NULL) {
|
|
/*
|
|
* src addr selection failed to find a route (or valid
|
|
* source addr), so we can't get there from here!
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("low_level_output: dropped v6 pkt- no valid source addr\n");
|
|
}
|
|
#endif
|
|
sctp_m_freem(m);
|
|
if (net) {
|
|
if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb)
|
|
sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
|
|
stcb,
|
|
SCTP_FAILED_THRESHOLD,
|
|
(void *)net);
|
|
net->dest_state &= ~SCTP_ADDR_REACHABLE;
|
|
net->dest_state |= SCTP_ADDR_NOT_REACHABLE;
|
|
if (stcb) {
|
|
if (net == stcb->asoc.primary_destination) {
|
|
/* need a new primary */
|
|
struct sctp_nets *alt;
|
|
alt = sctp_find_alternate_net(stcb, net);
|
|
if (alt != net) {
|
|
if (sctp_set_primary_addr(stcb,
|
|
(struct sockaddr *)NULL,
|
|
alt) == 0) {
|
|
net->dest_state |= SCTP_ADDR_WAS_PRIMARY;
|
|
net->src_addr_selected = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return (EHOSTUNREACH);
|
|
}
|
|
|
|
ip6h->ip6_src = lsa6->sin6_addr;
|
|
|
|
/*
|
|
* We set the hop limit now since there is a good chance that
|
|
* our ro pointer is now filled
|
|
*/
|
|
ip6h->ip6_hlim = in6_selecthlim((struct in6pcb *)&inp->ip_inp.inp,
|
|
(ro ?
|
|
(rt ? (rt->rt_ifp) : (NULL)) :
|
|
(NULL)));
|
|
o_flgs = 0;
|
|
ifp = rt->rt_ifp;
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
/* Copy to be sure something bad is not happening */
|
|
sin6->sin6_addr = ip6h->ip6_dst;
|
|
lsa6->sin6_addr = ip6h->ip6_src;
|
|
|
|
printf("Calling ipv6 output routine from low level\n");
|
|
printf("src: ");
|
|
sctp_print_address((struct sockaddr *)lsa6);
|
|
printf("dst: ");
|
|
sctp_print_address((struct sockaddr *)sin6);
|
|
}
|
|
#endif /* SCTP_DEBUG */
|
|
if (net) {
|
|
sin6 = (struct sockaddr_in6 *)&net->ro.ro_sa;
|
|
/* preserve the port and scope for link local send */
|
|
prev_scope = sin6->sin6_scope_id;
|
|
prev_port = sin6->sin6_port;
|
|
}
|
|
/* XXX NOMPSAFE need to hold ifp here */
|
|
rtcache_unref(rt, ro);
|
|
ret = ip6_output(m, ((struct in6pcb *)inp)->in6p_outputopts,
|
|
ro,
|
|
o_flgs,
|
|
((struct in6pcb *)inp)->in6p_moptions,
|
|
(struct in6pcb *)inp,
|
|
&ifp);
|
|
if (net) {
|
|
/* for link local this must be done */
|
|
sin6->sin6_scope_id = prev_scope;
|
|
sin6->sin6_port = prev_port;
|
|
}
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("return from send is %d\n", ret);
|
|
}
|
|
#endif /* SCTP_DEBUG_OUTPUT */
|
|
sctp_pegs[SCTP_DATAGRAMS_SENT]++;
|
|
if (net) {
|
|
/* PMTU check versus smallest asoc MTU goes here */
|
|
rt = rtcache_validate(ro);
|
|
if (rt == NULL) {
|
|
/* Route was freed */
|
|
net->src_addr_selected = 0;
|
|
}
|
|
if (rt != NULL) {
|
|
if (rt->rt_rmx.rmx_mtu &&
|
|
(stcb->asoc.smallest_mtu > rt->rt_rmx.rmx_mtu)) {
|
|
sctp_mtu_size_reset(inp,
|
|
&stcb->asoc,
|
|
rt->rt_rmx.rmx_mtu);
|
|
}
|
|
rtcache_unref(rt, ro);
|
|
} else if (ifp) {
|
|
if (ND_IFINFO(ifp)->linkmtu &&
|
|
(stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
|
|
sctp_mtu_size_reset(inp,
|
|
&stcb->asoc,
|
|
ND_IFINFO(ifp)->linkmtu);
|
|
}
|
|
}
|
|
}
|
|
return (ret);
|
|
}
|
|
#endif
|
|
else {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Unknown protocol (TSNH) type %d\n", ((const struct sockaddr *)to)->sa_family);
|
|
}
|
|
#endif
|
|
sctp_m_freem(m);
|
|
return (EFAULT);
|
|
}
|
|
}
|
|
|
|
static
|
|
int sctp_is_address_in_scope(struct ifaddr *ifa,
|
|
int ipv4_addr_legal,
|
|
int ipv6_addr_legal,
|
|
int loopback_scope,
|
|
int ipv4_local_scope,
|
|
int local_scope,
|
|
int site_scope)
|
|
{
|
|
if ((loopback_scope == 0) &&
|
|
(ifa->ifa_ifp) &&
|
|
(ifa->ifa_ifp->if_type == IFT_LOOP)) {
|
|
/* skip loopback if not in scope *
|
|
*/
|
|
return (0);
|
|
}
|
|
if ((ifa->ifa_addr->sa_family == AF_INET) && ipv4_addr_legal) {
|
|
struct sockaddr_in *sin;
|
|
sin = (struct sockaddr_in *)ifa->ifa_addr;
|
|
if (sin->sin_addr.s_addr == 0) {
|
|
/* not in scope , unspecified */
|
|
return (0);
|
|
}
|
|
if ((ipv4_local_scope == 0) &&
|
|
(IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
|
|
/* private address not in scope */
|
|
return (0);
|
|
}
|
|
} else if ((ifa->ifa_addr->sa_family == AF_INET6) && ipv6_addr_legal) {
|
|
struct sockaddr_in6 *sin6;
|
|
struct in6_ifaddr *ifa6;
|
|
|
|
ifa6 = (struct in6_ifaddr *)ifa;
|
|
/* ok to use deprecated addresses? */
|
|
if (!ip6_use_deprecated) {
|
|
if (ifa6->ia6_flags &
|
|
IN6_IFF_DEPRECATED) {
|
|
return (0);
|
|
}
|
|
}
|
|
if (ifa6->ia6_flags &
|
|
(IN6_IFF_DETACHED |
|
|
IN6_IFF_ANYCAST |
|
|
IN6_IFF_NOTREADY)) {
|
|
return (0);
|
|
}
|
|
sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
|
|
/* skip unspecifed addresses */
|
|
return (0);
|
|
}
|
|
if (/*(local_scope == 0) && */
|
|
(IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
|
|
return (0);
|
|
}
|
|
if ((site_scope == 0) &&
|
|
(IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
|
|
return (0);
|
|
}
|
|
} else {
|
|
return (0);
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
|
|
void
|
|
sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
|
|
{
|
|
struct mbuf *m, *m_at, *m_last;
|
|
struct sctp_nets *net;
|
|
struct sctp_init_msg *initm;
|
|
struct sctp_supported_addr_param *sup_addr;
|
|
struct sctp_ecn_supported_param *ecn;
|
|
struct sctp_prsctp_supported_param *prsctp;
|
|
struct sctp_ecn_nonce_supported_param *ecn_nonce;
|
|
struct sctp_supported_chunk_types_param *pr_supported;
|
|
int cnt_inits_to=0;
|
|
int padval, ret;
|
|
|
|
/* INIT's always go to the primary (and usually ONLY address) */
|
|
m_last = NULL;
|
|
net = stcb->asoc.primary_destination;
|
|
if (net == NULL) {
|
|
net = TAILQ_FIRST(&stcb->asoc.nets);
|
|
if (net == NULL) {
|
|
/* TSNH */
|
|
return;
|
|
}
|
|
/* we confirm any address we send an INIT to */
|
|
net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
|
|
sctp_set_primary_addr(stcb, NULL, net);
|
|
} else {
|
|
/* we confirm any address we send an INIT to */
|
|
net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
|
|
}
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
|
|
printf("Sending INIT to ");
|
|
sctp_print_address (rtcache_getdst(&net->ro));
|
|
}
|
|
#endif
|
|
if (rtcache_getdst(&net->ro)->sa_family == AF_INET6) {
|
|
/* special hook, if we are sending to link local
|
|
* it will not show up in our private address count.
|
|
*/
|
|
if (IN6_IS_ADDR_LINKLOCAL((const struct in6_addr *) rtcache_getdst(&net->ro)->sa_data))
|
|
cnt_inits_to = 1;
|
|
}
|
|
if (callout_pending(&net->rxt_timer.timer)) {
|
|
/* This case should not happen */
|
|
return;
|
|
}
|
|
/* start the INIT timer */
|
|
if (sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net)) {
|
|
/* we are hosed since I can't start the INIT timer? */
|
|
return;
|
|
}
|
|
MGETHDR(m, M_DONTWAIT, MT_HEADER);
|
|
if (m == NULL) {
|
|
/* No memory, INIT timer will re-attempt. */
|
|
return;
|
|
}
|
|
/* make it into a M_EXT */
|
|
MCLGET(m, M_DONTWAIT);
|
|
if ((m->m_flags & M_EXT) != M_EXT) {
|
|
/* Failed to get cluster buffer */
|
|
sctp_m_freem(m);
|
|
return;
|
|
}
|
|
m->m_data += SCTP_MIN_OVERHEAD;
|
|
m->m_len = sizeof(struct sctp_init_msg);
|
|
/* Now lets put the SCTP header in place */
|
|
initm = mtod(m, struct sctp_init_msg *);
|
|
initm->sh.src_port = inp->sctp_lport;
|
|
initm->sh.dest_port = stcb->rport;
|
|
initm->sh.v_tag = 0;
|
|
initm->sh.checksum = 0; /* calculate later */
|
|
/* now the chunk header */
|
|
initm->msg.ch.chunk_type = SCTP_INITIATION;
|
|
initm->msg.ch.chunk_flags = 0;
|
|
/* fill in later from mbuf we build */
|
|
initm->msg.ch.chunk_length = 0;
|
|
/* place in my tag */
|
|
initm->msg.init.initiate_tag = htonl(stcb->asoc.my_vtag);
|
|
/* set up some of the credits. */
|
|
initm->msg.init.a_rwnd = htonl(uimax(inp->sctp_socket->so_rcv.sb_hiwat,
|
|
SCTP_MINIMAL_RWND));
|
|
|
|
initm->msg.init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
|
|
initm->msg.init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
|
|
initm->msg.init.initial_tsn = htonl(stcb->asoc.init_seq_number);
|
|
/* now the address restriction */
|
|
sup_addr = (struct sctp_supported_addr_param *)((vaddr_t)initm +
|
|
sizeof(*initm));
|
|
sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
|
|
/* we support 2 types IPv6/IPv4 */
|
|
sup_addr->ph.param_length = htons(sizeof(*sup_addr) +
|
|
sizeof(uint16_t));
|
|
sup_addr->addr_type[0] = htons(SCTP_IPV4_ADDRESS);
|
|
sup_addr->addr_type[1] = htons(SCTP_IPV6_ADDRESS);
|
|
m->m_len += sizeof(*sup_addr) + sizeof(uint16_t);
|
|
|
|
/* if (inp->sctp_flags & SCTP_PCB_FLAGS_ADAPTIONEVNT) {*/
|
|
if (inp->sctp_ep.adaption_layer_indicator) {
|
|
struct sctp_adaption_layer_indication *ali;
|
|
ali = (struct sctp_adaption_layer_indication *)(
|
|
(vaddr_t)sup_addr + sizeof(*sup_addr) + sizeof(uint16_t));
|
|
ali->ph.param_type = htons(SCTP_ULP_ADAPTION);
|
|
ali->ph.param_length = htons(sizeof(*ali));
|
|
ali->indication = ntohl(inp->sctp_ep.adaption_layer_indicator);
|
|
m->m_len += sizeof(*ali);
|
|
ecn = (struct sctp_ecn_supported_param *)((vaddr_t)ali +
|
|
sizeof(*ali));
|
|
} else {
|
|
ecn = (struct sctp_ecn_supported_param *)((vaddr_t)sup_addr +
|
|
sizeof(*sup_addr) + sizeof(uint16_t));
|
|
}
|
|
|
|
/* now any cookie time extensions */
|
|
if (stcb->asoc.cookie_preserve_req) {
|
|
struct sctp_cookie_perserve_param *cookie_preserve;
|
|
cookie_preserve = (struct sctp_cookie_perserve_param *)(ecn);
|
|
cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
|
|
cookie_preserve->ph.param_length = htons(
|
|
sizeof(*cookie_preserve));
|
|
cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
|
|
m->m_len += sizeof(*cookie_preserve);
|
|
ecn = (struct sctp_ecn_supported_param *)(
|
|
(vaddr_t)cookie_preserve + sizeof(*cookie_preserve));
|
|
stcb->asoc.cookie_preserve_req = 0;
|
|
}
|
|
|
|
/* ECN parameter */
|
|
if (sctp_ecn == 1) {
|
|
ecn->ph.param_type = htons(SCTP_ECN_CAPABLE);
|
|
ecn->ph.param_length = htons(sizeof(*ecn));
|
|
m->m_len += sizeof(*ecn);
|
|
prsctp = (struct sctp_prsctp_supported_param *)((vaddr_t)ecn +
|
|
sizeof(*ecn));
|
|
} else {
|
|
prsctp = (struct sctp_prsctp_supported_param *)((vaddr_t)ecn);
|
|
}
|
|
/* And now tell the peer we do pr-sctp */
|
|
prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED);
|
|
prsctp->ph.param_length = htons(sizeof(*prsctp));
|
|
m->m_len += sizeof(*prsctp);
|
|
|
|
|
|
/* And now tell the peer we do all the extensions */
|
|
pr_supported = (struct sctp_supported_chunk_types_param *)((vaddr_t)prsctp +
|
|
sizeof(*prsctp));
|
|
|
|
pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
|
|
pr_supported->ph.param_length = htons(sizeof(*pr_supported) + SCTP_EXT_COUNT);
|
|
pr_supported->chunk_types[0] = SCTP_ASCONF;
|
|
pr_supported->chunk_types[1] = SCTP_ASCONF_ACK;
|
|
pr_supported->chunk_types[2] = SCTP_FORWARD_CUM_TSN;
|
|
pr_supported->chunk_types[3] = SCTP_PACKET_DROPPED;
|
|
pr_supported->chunk_types[4] = SCTP_STREAM_RESET;
|
|
pr_supported->chunk_types[5] = 0; /* pad */
|
|
pr_supported->chunk_types[6] = 0; /* pad */
|
|
pr_supported->chunk_types[7] = 0; /* pad */
|
|
|
|
m->m_len += (sizeof(*pr_supported) + SCTP_EXT_COUNT + SCTP_PAD_EXT_COUNT);
|
|
/* ECN nonce: And now tell the peer we support ECN nonce */
|
|
|
|
if (sctp_ecn_nonce) {
|
|
ecn_nonce = (struct sctp_ecn_nonce_supported_param *)((vaddr_t)pr_supported +
|
|
sizeof(*pr_supported) + SCTP_EXT_COUNT + SCTP_PAD_EXT_COUNT);
|
|
ecn_nonce->ph.param_type = htons(SCTP_ECN_NONCE_SUPPORTED);
|
|
ecn_nonce->ph.param_length = htons(sizeof(*ecn_nonce));
|
|
m->m_len += sizeof(*ecn_nonce);
|
|
}
|
|
|
|
m_at = m;
|
|
/* now the addresses */
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
|
|
struct ifnet *ifn;
|
|
struct ifaddr *ifa;
|
|
int cnt;
|
|
int s;
|
|
|
|
cnt = cnt_inits_to;
|
|
s = pserialize_read_enter();
|
|
IFNET_READER_FOREACH(ifn) {
|
|
if ((stcb->asoc.loopback_scope == 0) &&
|
|
(ifn->if_type == IFT_LOOP)) {
|
|
/*
|
|
* Skip loopback devices if loopback_scope
|
|
* not set
|
|
*/
|
|
continue;
|
|
}
|
|
IFADDR_READER_FOREACH(ifa, ifn) {
|
|
if (sctp_is_address_in_scope(ifa,
|
|
stcb->asoc.ipv4_addr_legal,
|
|
stcb->asoc.ipv6_addr_legal,
|
|
stcb->asoc.loopback_scope,
|
|
stcb->asoc.ipv4_local_scope,
|
|
stcb->asoc.local_scope,
|
|
stcb->asoc.site_scope) == 0) {
|
|
continue;
|
|
}
|
|
cnt++;
|
|
}
|
|
}
|
|
pserialize_read_exit(s);
|
|
|
|
if (cnt > 1) {
|
|
s = pserialize_read_enter();
|
|
IFNET_READER_FOREACH(ifn) {
|
|
if ((stcb->asoc.loopback_scope == 0) &&
|
|
(ifn->if_type == IFT_LOOP)) {
|
|
/*
|
|
* Skip loopback devices if loopback_scope
|
|
* not set
|
|
*/
|
|
continue;
|
|
}
|
|
IFADDR_READER_FOREACH(ifa, ifn) {
|
|
if (sctp_is_address_in_scope(ifa,
|
|
stcb->asoc.ipv4_addr_legal,
|
|
stcb->asoc.ipv6_addr_legal,
|
|
stcb->asoc.loopback_scope,
|
|
stcb->asoc.ipv4_local_scope,
|
|
stcb->asoc.local_scope,
|
|
stcb->asoc.site_scope) == 0) {
|
|
continue;
|
|
}
|
|
m_at = sctp_add_addr_to_mbuf(m_at, ifa);
|
|
}
|
|
}
|
|
pserialize_read_exit(s);
|
|
}
|
|
} else {
|
|
struct sctp_laddr *laddr;
|
|
int cnt;
|
|
cnt = cnt_inits_to;
|
|
/* First, how many ? */
|
|
LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
|
|
if (laddr->ifa == NULL) {
|
|
continue;
|
|
}
|
|
if (laddr->ifa->ifa_addr == NULL)
|
|
continue;
|
|
if (sctp_is_address_in_scope(laddr->ifa,
|
|
stcb->asoc.ipv4_addr_legal,
|
|
stcb->asoc.ipv6_addr_legal,
|
|
stcb->asoc.loopback_scope,
|
|
stcb->asoc.ipv4_local_scope,
|
|
stcb->asoc.local_scope,
|
|
stcb->asoc.site_scope) == 0) {
|
|
continue;
|
|
}
|
|
cnt++;
|
|
}
|
|
/* To get through a NAT we only list addresses if
|
|
* we have more than one. That way if you just
|
|
* bind a single address we let the source of the init
|
|
* dictate our address.
|
|
*/
|
|
if (cnt > 1) {
|
|
LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
|
|
if (laddr->ifa == NULL) {
|
|
continue;
|
|
}
|
|
if (laddr->ifa->ifa_addr == NULL) {
|
|
continue;
|
|
}
|
|
|
|
if (sctp_is_address_in_scope(laddr->ifa,
|
|
stcb->asoc.ipv4_addr_legal,
|
|
stcb->asoc.ipv6_addr_legal,
|
|
stcb->asoc.loopback_scope,
|
|
stcb->asoc.ipv4_local_scope,
|
|
stcb->asoc.local_scope,
|
|
stcb->asoc.site_scope) == 0) {
|
|
continue;
|
|
}
|
|
m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa);
|
|
}
|
|
}
|
|
}
|
|
/* calulate the size and update pkt header and chunk header */
|
|
m->m_pkthdr.len = 0;
|
|
for (m_at = m; m_at; m_at = m_at->m_next) {
|
|
if (m_at->m_next == NULL)
|
|
m_last = m_at;
|
|
m->m_pkthdr.len += m_at->m_len;
|
|
}
|
|
initm->msg.ch.chunk_length = htons((m->m_pkthdr.len -
|
|
sizeof(struct sctphdr)));
|
|
#ifdef SCTP_DEBUG
|
|
printf("chunk_length %d\n", ntohs(initm->msg.ch.chunk_length));
|
|
#endif
|
|
/* We pass 0 here to NOT set IP_DF if its IPv4, we
|
|
* ignore the return here since the timer will drive
|
|
* a retranmission.
|
|
*/
|
|
|
|
/* I don't expect this to execute but we will be safe here */
|
|
padval = m->m_pkthdr.len % 4;
|
|
if ((padval) && (m_last)) {
|
|
/* The compiler worries that m_last may not be
|
|
* set even though I think it is impossible :->
|
|
* however we add m_last here just in case.
|
|
*/
|
|
ret = sctp_add_pad_tombuf(m_last, (4-padval));
|
|
if (ret) {
|
|
/* Houston we have a problem, no space */
|
|
sctp_m_freem(m);
|
|
return;
|
|
}
|
|
m->m_pkthdr.len += padval;
|
|
}
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
|
|
printf("Calling lowlevel output stcb:%p net:%p\n",
|
|
stcb, net);
|
|
}
|
|
#endif
|
|
ret = sctp_lowlevel_chunk_output(inp, stcb, net,
|
|
rtcache_getdst(&net->ro), m, 0, 0, NULL, 0);
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
|
|
printf("Low level output returns %d\n", ret);
|
|
}
|
|
#endif
|
|
sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
|
|
SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
|
|
}
|
|
|
|
struct mbuf *
|
|
sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
|
|
int param_offset, int *abort_processing, struct sctp_chunkhdr *cp)
|
|
{
|
|
/* Given a mbuf containing an INIT or INIT-ACK
|
|
* with the param_offset being equal to the
|
|
* beginning of the params i.e. (iphlen + sizeof(struct sctp_init_msg)
|
|
* parse through the parameters to the end of the mbuf verifying
|
|
* that all parameters are known.
|
|
*
|
|
* For unknown parameters build and return a mbuf with
|
|
* UNRECOGNIZED_PARAMETER errors. If the flags indicate
|
|
* to stop processing this chunk stop, and set *abort_processing
|
|
* to 1.
|
|
*
|
|
* By having param_offset be pre-set to where parameters begin
|
|
* it is hoped that this routine may be reused in the future
|
|
* by new features.
|
|
*/
|
|
struct sctp_paramhdr *phdr, params;
|
|
|
|
struct mbuf *mat, *op_err;
|
|
char tempbuf[2048];
|
|
int at, limit, pad_needed;
|
|
uint16_t ptype, plen;
|
|
int err_at;
|
|
|
|
*abort_processing = 0;
|
|
mat = in_initpkt;
|
|
err_at = 0;
|
|
limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
|
|
printf("Limit is %d bytes\n", limit);
|
|
}
|
|
#endif
|
|
at = param_offset;
|
|
op_err = NULL;
|
|
|
|
phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
|
|
while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
|
|
ptype = ntohs(phdr->param_type);
|
|
plen = ntohs(phdr->param_length);
|
|
limit -= SCTP_SIZE32(plen);
|
|
if (plen < sizeof(struct sctp_paramhdr)) {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
|
|
printf("sctp_output.c:Impossible length in parameter < %d\n", plen);
|
|
}
|
|
#endif
|
|
*abort_processing = 1;
|
|
break;
|
|
}
|
|
/* All parameters for all chunks that we
|
|
* know/understand are listed here. We process
|
|
* them other places and make appropriate
|
|
* stop actions per the upper bits. However
|
|
* this is the generic routine processor's can
|
|
* call to get back an operr.. to either incorporate (init-ack)
|
|
* or send.
|
|
*/
|
|
if ((ptype == SCTP_HEARTBEAT_INFO) ||
|
|
(ptype == SCTP_IPV4_ADDRESS) ||
|
|
(ptype == SCTP_IPV6_ADDRESS) ||
|
|
(ptype == SCTP_STATE_COOKIE) ||
|
|
(ptype == SCTP_UNRECOG_PARAM) ||
|
|
(ptype == SCTP_COOKIE_PRESERVE) ||
|
|
(ptype == SCTP_SUPPORTED_ADDRTYPE) ||
|
|
(ptype == SCTP_PRSCTP_SUPPORTED) ||
|
|
(ptype == SCTP_ADD_IP_ADDRESS) ||
|
|
(ptype == SCTP_DEL_IP_ADDRESS) ||
|
|
(ptype == SCTP_ECN_CAPABLE) ||
|
|
(ptype == SCTP_ULP_ADAPTION) ||
|
|
(ptype == SCTP_ERROR_CAUSE_IND) ||
|
|
(ptype == SCTP_SET_PRIM_ADDR) ||
|
|
(ptype == SCTP_SUCCESS_REPORT) ||
|
|
(ptype == SCTP_ULP_ADAPTION) ||
|
|
(ptype == SCTP_SUPPORTED_CHUNK_EXT) ||
|
|
(ptype == SCTP_ECN_NONCE_SUPPORTED)
|
|
) {
|
|
/* no skip it */
|
|
at += SCTP_SIZE32(plen);
|
|
} else if (ptype == SCTP_HOSTNAME_ADDRESS) {
|
|
/* We can NOT handle HOST NAME addresses!! */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
|
|
printf("Can't handle hostname addresses.. abort processing\n");
|
|
}
|
|
#endif
|
|
*abort_processing = 1;
|
|
if (op_err == NULL) {
|
|
/* Ok need to try to get a mbuf */
|
|
MGETHDR(op_err, M_DONTWAIT, MT_DATA);
|
|
if (op_err) {
|
|
op_err->m_len = 0;
|
|
op_err->m_pkthdr.len = 0;
|
|
/* pre-reserve space for ip and sctp header and chunk hdr*/
|
|
op_err->m_data += sizeof(struct ip6_hdr);
|
|
op_err->m_data += sizeof(struct sctphdr);
|
|
op_err->m_data += sizeof(struct sctp_chunkhdr);
|
|
}
|
|
}
|
|
if (op_err) {
|
|
/* If we have space */
|
|
struct sctp_paramhdr s;
|
|
if (err_at % 4) {
|
|
u_int32_t cpthis=0;
|
|
pad_needed = 4 - (err_at % 4);
|
|
m_copyback(op_err, err_at, pad_needed, (void *)&cpthis);
|
|
err_at += pad_needed;
|
|
}
|
|
s.param_type = htons(SCTP_CAUSE_UNRESOLV_ADDR);
|
|
s.param_length = htons(sizeof(s) + plen);
|
|
m_copyback(op_err, err_at, sizeof(s), (void *)&s);
|
|
err_at += sizeof(s);
|
|
phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, plen);
|
|
if (phdr == NULL) {
|
|
sctp_m_freem(op_err);
|
|
/* we are out of memory but we
|
|
* still need to have a look at what to
|
|
* do (the system is in trouble though).
|
|
*/
|
|
return (NULL);
|
|
}
|
|
m_copyback(op_err, err_at, plen, (void *)phdr);
|
|
err_at += plen;
|
|
}
|
|
return (op_err);
|
|
} else {
|
|
/* we do not recognize the parameter
|
|
* figure out what we do.
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
|
|
printf("Got parameter type %x - unknown\n",
|
|
(u_int)ptype);
|
|
}
|
|
#endif
|
|
if ((ptype & 0x4000) == 0x4000) {
|
|
/* Report bit is set?? */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
|
|
printf("Report bit is set\n");
|
|
}
|
|
#endif
|
|
if (op_err == NULL) {
|
|
/* Ok need to try to get an mbuf */
|
|
MGETHDR(op_err, M_DONTWAIT, MT_DATA);
|
|
if (op_err) {
|
|
op_err->m_len = 0;
|
|
op_err->m_pkthdr.len = 0;
|
|
op_err->m_data += sizeof(struct ip6_hdr);
|
|
op_err->m_data += sizeof(struct sctphdr);
|
|
op_err->m_data += sizeof(struct sctp_chunkhdr);
|
|
}
|
|
}
|
|
if (op_err) {
|
|
/* If we have space */
|
|
struct sctp_paramhdr s;
|
|
if (err_at % 4) {
|
|
u_int32_t cpthis=0;
|
|
pad_needed = 4 - (err_at % 4);
|
|
m_copyback(op_err, err_at, pad_needed, (void *)&cpthis);
|
|
err_at += pad_needed;
|
|
}
|
|
s.param_type = htons(SCTP_UNRECOG_PARAM);
|
|
s.param_length = htons(sizeof(s) + plen);
|
|
m_copyback(op_err, err_at, sizeof(s), (void *)&s);
|
|
err_at += sizeof(s);
|
|
if (plen > sizeof(tempbuf)) {
|
|
plen = sizeof(tempbuf);
|
|
}
|
|
phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, plen);
|
|
if (phdr == NULL) {
|
|
sctp_m_freem(op_err);
|
|
/* we are out of memory but we
|
|
* still need to have a look at what to
|
|
* do (the system is in trouble though).
|
|
*/
|
|
goto more_processing;
|
|
}
|
|
m_copyback(op_err, err_at, plen, (void *)phdr);
|
|
err_at += plen;
|
|
}
|
|
}
|
|
more_processing:
|
|
if ((ptype & 0x8000) == 0x0000) {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
|
|
printf("Abort bit is now setting1\n");
|
|
}
|
|
#endif
|
|
return (op_err);
|
|
} else {
|
|
/* skip this chunk and continue processing */
|
|
at += SCTP_SIZE32(plen);
|
|
}
|
|
|
|
}
|
|
phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
|
|
}
|
|
return (op_err);
|
|
}
|
|
|
|
static int
|
|
sctp_are_there_new_addresses(struct sctp_association *asoc,
|
|
struct mbuf *in_initpkt, int iphlen, int offset)
|
|
{
|
|
/*
|
|
* Given a INIT packet, look through the packet to verify that
|
|
* there are NO new addresses. As we go through the parameters
|
|
* add reports of any un-understood parameters that require an
|
|
* error. Also we must return (1) to drop the packet if we see
|
|
* a un-understood parameter that tells us to drop the chunk.
|
|
*/
|
|
struct sockaddr_in sin4, *sa4;
|
|
struct sockaddr_in6 sin6, *sa6;
|
|
struct sockaddr *sa_touse;
|
|
struct sockaddr *sa;
|
|
struct sctp_paramhdr *phdr, params;
|
|
struct ip *iph;
|
|
struct mbuf *mat;
|
|
uint16_t ptype, plen;
|
|
uint8_t fnd;
|
|
struct sctp_nets *net;
|
|
|
|
memset(&sin4, 0, sizeof(sin4));
|
|
memset(&sin6, 0, sizeof(sin6));
|
|
sin4.sin_family = AF_INET;
|
|
sin4.sin_len = sizeof(sin4);
|
|
sin6.sin6_family = AF_INET6;
|
|
sin6.sin6_len = sizeof(sin6);
|
|
|
|
sa_touse = NULL;
|
|
/* First what about the src address of the pkt ? */
|
|
iph = mtod(in_initpkt, struct ip *);
|
|
if (iph->ip_v == IPVERSION) {
|
|
/* source addr is IPv4 */
|
|
sin4.sin_addr = iph->ip_src;
|
|
sa_touse = (struct sockaddr *)&sin4;
|
|
} else if (iph->ip_v == (IPV6_VERSION >> 4)) {
|
|
/* source addr is IPv6 */
|
|
struct ip6_hdr *ip6h;
|
|
ip6h = mtod(in_initpkt, struct ip6_hdr *);
|
|
sin6.sin6_addr = ip6h->ip6_src;
|
|
sa_touse = (struct sockaddr *)&sin6;
|
|
} else {
|
|
return (1);
|
|
}
|
|
|
|
fnd = 0;
|
|
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
|
|
sa = (struct sockaddr *)&net->ro.ro_sa;
|
|
if (sa->sa_family == sa_touse->sa_family) {
|
|
if (sa->sa_family == AF_INET) {
|
|
sa4 = (struct sockaddr_in *)sa;
|
|
if (sa4->sin_addr.s_addr ==
|
|
sin4.sin_addr.s_addr) {
|
|
fnd = 1;
|
|
break;
|
|
}
|
|
} else if (sa->sa_family == AF_INET6) {
|
|
sa6 = (struct sockaddr_in6 *)sa;
|
|
if (SCTP6_ARE_ADDR_EQUAL(&sa6->sin6_addr,
|
|
&sin6.sin6_addr)) {
|
|
fnd = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (fnd == 0) {
|
|
/* New address added! no need to look futher. */
|
|
return (1);
|
|
}
|
|
/* Ok so far lets munge through the rest of the packet */
|
|
mat = in_initpkt;
|
|
sa_touse = NULL;
|
|
offset += sizeof(struct sctp_init_chunk);
|
|
phdr = sctp_get_next_param(mat, offset, ¶ms, sizeof(params));
|
|
while (phdr) {
|
|
ptype = ntohs(phdr->param_type);
|
|
plen = ntohs(phdr->param_length);
|
|
if (ptype == SCTP_IPV4_ADDRESS) {
|
|
struct sctp_ipv4addr_param *p4, p4_buf;
|
|
|
|
phdr = sctp_get_next_param(mat, offset,
|
|
(struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
|
|
if (plen != sizeof(struct sctp_ipv4addr_param) ||
|
|
phdr == NULL) {
|
|
return (1);
|
|
}
|
|
p4 = (struct sctp_ipv4addr_param *)phdr;
|
|
sin4.sin_addr.s_addr = p4->addr;
|
|
sa_touse = (struct sockaddr *)&sin4;
|
|
} else if (ptype == SCTP_IPV6_ADDRESS) {
|
|
struct sctp_ipv6addr_param *p6, p6_buf;
|
|
|
|
phdr = sctp_get_next_param(mat, offset,
|
|
(struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
|
|
if (plen != sizeof(struct sctp_ipv6addr_param) ||
|
|
phdr == NULL) {
|
|
return (1);
|
|
}
|
|
p6 = (struct sctp_ipv6addr_param *)phdr;
|
|
memcpy((void *)&sin6.sin6_addr, p6->addr,
|
|
sizeof(p6->addr));
|
|
sa_touse = (struct sockaddr *)&sin4;
|
|
}
|
|
|
|
if (sa_touse) {
|
|
/* ok, sa_touse points to one to check */
|
|
fnd = 0;
|
|
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
|
|
sa = (struct sockaddr *)&net->ro.ro_sa;
|
|
if (sa->sa_family != sa_touse->sa_family) {
|
|
continue;
|
|
}
|
|
if (sa->sa_family == AF_INET) {
|
|
sa4 = (struct sockaddr_in *)sa;
|
|
if (sa4->sin_addr.s_addr ==
|
|
sin4.sin_addr.s_addr) {
|
|
fnd = 1;
|
|
break;
|
|
}
|
|
} else if (sa->sa_family == AF_INET6) {
|
|
sa6 = (struct sockaddr_in6 *)sa;
|
|
if (SCTP6_ARE_ADDR_EQUAL(
|
|
&sa6->sin6_addr, &sin6.sin6_addr)) {
|
|
fnd = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (!fnd) {
|
|
/* New addr added! no need to look further */
|
|
return (1);
|
|
}
|
|
}
|
|
offset += SCTP_SIZE32(plen);
|
|
phdr = sctp_get_next_param(mat, offset, ¶ms, sizeof(params));
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Given a MBUF chain that was sent into us containing an
|
|
* INIT. Build a INIT-ACK with COOKIE and send back.
|
|
* We assume that the in_initpkt has done a pullup to
|
|
* include IPv6/4header, SCTP header and initial part of
|
|
* INIT message (i.e. the struct sctp_init_msg).
|
|
*/
|
|
void
|
|
sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
|
|
struct mbuf *init_pkt, int iphlen, int offset, struct sctphdr *sh,
|
|
struct sctp_init_chunk *init_chk)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct mbuf *m, *m_at, *m_tmp, *m_cookie, *op_err, *m_last;
|
|
struct sctp_init_msg *initackm_out;
|
|
struct sctp_ecn_supported_param *ecn;
|
|
struct sctp_prsctp_supported_param *prsctp;
|
|
struct sctp_ecn_nonce_supported_param *ecn_nonce;
|
|
struct sctp_supported_chunk_types_param *pr_supported;
|
|
struct sockaddr_storage store;
|
|
struct sockaddr_in *sin;
|
|
struct sockaddr_in6 *sin6;
|
|
struct route *ro;
|
|
struct ip *iph;
|
|
struct ip6_hdr *ip6;
|
|
const struct sockaddr *to;
|
|
struct sctp_state_cookie stc;
|
|
struct sctp_nets *net=NULL;
|
|
int cnt_inits_to=0;
|
|
uint16_t his_limit, i_want;
|
|
int abort_flag, padval, sz_of;
|
|
struct rtentry *rt;
|
|
|
|
if (stcb) {
|
|
asoc = &stcb->asoc;
|
|
} else {
|
|
asoc = NULL;
|
|
}
|
|
m_last = NULL;
|
|
if ((asoc != NULL) &&
|
|
(SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
|
|
(sctp_are_there_new_addresses(asoc, init_pkt, iphlen, offset))) {
|
|
/* new addresses, out of here in non-cookie-wait states */
|
|
/*
|
|
* Send a ABORT, we don't add the new address error clause though
|
|
* we even set the T bit and copy in the 0 tag.. this looks no
|
|
* different than if no listner was present.
|
|
*/
|
|
sctp_send_abort(init_pkt, iphlen, sh, 0, NULL);
|
|
return;
|
|
}
|
|
abort_flag = 0;
|
|
op_err = sctp_arethere_unrecognized_parameters(init_pkt,
|
|
(offset+sizeof(struct sctp_init_chunk)),
|
|
&abort_flag, (struct sctp_chunkhdr *)init_chk);
|
|
if (abort_flag) {
|
|
sctp_send_abort(init_pkt, iphlen, sh, init_chk->init.initiate_tag, op_err);
|
|
return;
|
|
}
|
|
MGETHDR(m, M_DONTWAIT, MT_HEADER);
|
|
if (m == NULL) {
|
|
/* No memory, INIT timer will re-attempt. */
|
|
if (op_err)
|
|
sctp_m_freem(op_err);
|
|
return;
|
|
}
|
|
MCLGET(m, M_DONTWAIT);
|
|
if ((m->m_flags & M_EXT) != M_EXT) {
|
|
/* Failed to get cluster buffer */
|
|
if (op_err)
|
|
sctp_m_freem(op_err);
|
|
sctp_m_freem(m);
|
|
return;
|
|
}
|
|
m->m_data += SCTP_MIN_OVERHEAD;
|
|
m_reset_rcvif(m);
|
|
m->m_len = sizeof(struct sctp_init_msg);
|
|
|
|
/* the time I built cookie */
|
|
SCTP_GETTIME_TIMEVAL(&stc.time_entered);
|
|
|
|
/* populate any tie tags */
|
|
if (asoc != NULL) {
|
|
/* unlock before tag selections */
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
if (asoc->my_vtag_nonce == 0)
|
|
asoc->my_vtag_nonce = sctp_select_a_tag(inp);
|
|
stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
|
|
|
|
if (asoc->peer_vtag_nonce == 0)
|
|
asoc->peer_vtag_nonce = sctp_select_a_tag(inp);
|
|
stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
|
|
|
|
stc.cookie_life = asoc->cookie_life;
|
|
net = asoc->primary_destination;
|
|
/* now we must relock */
|
|
SCTP_INP_RLOCK(inp);
|
|
/* we may be in trouble here if the inp got freed
|
|
* most likely this set of tests will protect
|
|
* us but there is a chance not.
|
|
*/
|
|
if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
|
|
if (op_err)
|
|
sctp_m_freem(op_err);
|
|
sctp_m_freem(m);
|
|
sctp_send_abort(init_pkt, iphlen, sh, 0, NULL);
|
|
return;
|
|
}
|
|
SCTP_TCB_LOCK(stcb);
|
|
SCTP_INP_RUNLOCK(stcb->sctp_ep);
|
|
} else {
|
|
stc.tie_tag_my_vtag = 0;
|
|
stc.tie_tag_peer_vtag = 0;
|
|
/* life I will award this cookie */
|
|
stc.cookie_life = inp->sctp_ep.def_cookie_life;
|
|
}
|
|
|
|
/* copy in the ports for later check */
|
|
stc.myport = sh->dest_port;
|
|
stc.peerport = sh->src_port;
|
|
|
|
/*
|
|
* If we wanted to honor cookie life extentions, we would add
|
|
* to stc.cookie_life. For now we should NOT honor any extension
|
|
*/
|
|
stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
|
|
struct inpcb *in_inp;
|
|
/* Its a V6 socket */
|
|
in_inp = (struct inpcb *)inp;
|
|
stc.ipv6_addr_legal = 1;
|
|
/* Now look at the binding flag to see if V4 will be legal */
|
|
if (
|
|
#if defined(__FreeBSD__) || defined(__APPLE__)
|
|
(in_inp->inp_flags & IN6P_IPV6_V6ONLY)
|
|
#elif defined(__OpenBSD__)
|
|
(0) /* For openbsd we do dual bind only */
|
|
#else
|
|
(((struct in6pcb *)in_inp)->in6p_flags & IN6P_IPV6_V6ONLY)
|
|
#endif
|
|
== 0) {
|
|
stc.ipv4_addr_legal = 1;
|
|
} else {
|
|
/* V4 addresses are NOT legal on the association */
|
|
stc.ipv4_addr_legal = 0;
|
|
}
|
|
} else {
|
|
/* Its a V4 socket, no - V6 */
|
|
stc.ipv4_addr_legal = 1;
|
|
stc.ipv6_addr_legal = 0;
|
|
}
|
|
|
|
#ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
|
|
stc.ipv4_scope = 1;
|
|
#else
|
|
stc.ipv4_scope = 0;
|
|
#endif
|
|
/* now for scope setup */
|
|
memset((void *)&store, 0, sizeof(store));
|
|
sin = (struct sockaddr_in *)&store;
|
|
sin6 = (struct sockaddr_in6 *)&store;
|
|
if (net == NULL) {
|
|
to = (struct sockaddr *)&store;
|
|
iph = mtod(init_pkt, struct ip *);
|
|
if (iph->ip_v == IPVERSION) {
|
|
struct in_addr addr;
|
|
static struct route iproute;
|
|
|
|
sin->sin_family = AF_INET;
|
|
sin->sin_len = sizeof(struct sockaddr_in);
|
|
sin->sin_port = sh->src_port;
|
|
sin->sin_addr = iph->ip_src;
|
|
/* lookup address */
|
|
stc.address[0] = sin->sin_addr.s_addr;
|
|
stc.address[1] = 0;
|
|
stc.address[2] = 0;
|
|
stc.address[3] = 0;
|
|
stc.addr_type = SCTP_IPV4_ADDRESS;
|
|
/* local from address */
|
|
memset(&iproute, 0, sizeof(iproute));
|
|
ro = &iproute;
|
|
|
|
/* XXX */
|
|
rt = rtcache_lookup(ro, (struct sockaddr *) sin);
|
|
rtcache_unref(rt, ro);
|
|
addr = sctp_ipv4_source_address_selection(inp, NULL,
|
|
ro, NULL, 0);
|
|
stc.laddress[0] = addr.s_addr;
|
|
stc.laddress[1] = 0;
|
|
stc.laddress[2] = 0;
|
|
stc.laddress[3] = 0;
|
|
stc.laddr_type = SCTP_IPV4_ADDRESS;
|
|
/* scope_id is only for v6 */
|
|
stc.scope_id = 0;
|
|
#ifndef SCTP_DONT_DO_PRIVADDR_SCOPE
|
|
if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
|
|
stc.ipv4_scope = 1;
|
|
}
|
|
#else
|
|
stc.ipv4_scope = 1;
|
|
#endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
|
|
/* Must use the address in this case */
|
|
if (sctp_is_address_on_local_host((struct sockaddr *)sin)) {
|
|
stc.loopback_scope = 1;
|
|
stc.ipv4_scope = 1;
|
|
stc.site_scope = 1;
|
|
stc.local_scope = 1;
|
|
}
|
|
} else if (iph->ip_v == (IPV6_VERSION >> 4)) {
|
|
struct in6_addr addr;
|
|
static struct route iproute6;
|
|
ip6 = mtod(init_pkt, struct ip6_hdr *);
|
|
sin6->sin6_family = AF_INET6;
|
|
sin6->sin6_len = sizeof(struct sockaddr_in6);
|
|
sin6->sin6_port = sh->src_port;
|
|
sin6->sin6_addr = ip6->ip6_src;
|
|
/* lookup address */
|
|
memcpy(&stc.address, &sin6->sin6_addr,
|
|
sizeof(struct in6_addr));
|
|
sin6->sin6_scope_id = 0;
|
|
stc.addr_type = SCTP_IPV6_ADDRESS;
|
|
stc.scope_id = 0;
|
|
if (sctp_is_address_on_local_host((struct sockaddr *)sin6)) {
|
|
stc.loopback_scope = 1;
|
|
stc.local_scope = 1;
|
|
stc.site_scope = 1;
|
|
stc.ipv4_scope = 1;
|
|
} else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
|
|
/*
|
|
* If the new destination is a LINK_LOCAL
|
|
* we must have common both site and local
|
|
* scope. Don't set local scope though since
|
|
* we must depend on the source to be added
|
|
* implicitly. We cannot assure just because
|
|
* we share one link that all links are common.
|
|
*
|
|
* XXX: never treat link-local case explicitly.
|
|
* Use general routines defined in scope6.c.
|
|
* (jinmei@kame)
|
|
*/
|
|
stc.local_scope = 0;
|
|
stc.site_scope = 1;
|
|
stc.ipv4_scope = 1;
|
|
/* we start counting for the private
|
|
* address stuff at 1. since the link
|
|
* local we source from won't show
|
|
* up in our scoped count.
|
|
*/
|
|
cnt_inits_to=1;
|
|
/* pull out the scope_id from incoming pkt */
|
|
#if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__)
|
|
(void)in6_recoverscope(sin6, &in6_src,
|
|
m_get_rcvif_NOMPSAFE(init_pkt));
|
|
in6_embedscope(&sin6->sin6_addr, sin6, NULL,
|
|
NULL);
|
|
#else
|
|
(void)sa6_recoverscope(sin6);
|
|
#endif
|
|
stc.scope_id = sin6->sin6_scope_id;
|
|
|
|
} else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
|
|
/*
|
|
* If the new destination is SITE_LOCAL
|
|
* then we must have site scope in common.
|
|
*/
|
|
stc.site_scope = 1;
|
|
}
|
|
/* local from address */
|
|
memset(&iproute6, 0, sizeof(iproute6));
|
|
ro = (struct route *)&iproute6;
|
|
/* XXX */
|
|
rt = rtcache_lookup(ro, (struct sockaddr *) sin6);
|
|
rtcache_unref(rt, ro);
|
|
addr = sctp_ipv6_source_address_selection(inp, NULL,
|
|
ro, NULL, 0);
|
|
memcpy(&stc.laddress, &addr, sizeof(struct in6_addr));
|
|
stc.laddr_type = SCTP_IPV6_ADDRESS;
|
|
}
|
|
} else {
|
|
/* set the scope per the existing tcb */
|
|
struct sctp_nets *lnet;
|
|
|
|
stc.loopback_scope = asoc->loopback_scope;
|
|
stc.ipv4_scope = asoc->ipv4_local_scope;
|
|
stc.site_scope = asoc->site_scope;
|
|
stc.local_scope = asoc->local_scope;
|
|
TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
|
|
if (rtcache_getdst(&lnet->ro)->sa_family == AF_INET6) {
|
|
if (IN6_IS_ADDR_LINKLOCAL((const struct in6_addr *) rtcache_getdst(&lnet->ro)->sa_data)) {
|
|
/* if we have a LL address, start counting
|
|
* at 1.
|
|
*/
|
|
cnt_inits_to = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* use the net pointer */
|
|
to = rtcache_getdst(&net->ro);
|
|
if (to->sa_family == AF_INET) {
|
|
memcpy(&stc.address[0], to, sizeof(struct in_addr));
|
|
stc.address[1] = 0;
|
|
stc.address[2] = 0;
|
|
stc.address[3] = 0;
|
|
stc.addr_type = SCTP_IPV4_ADDRESS;
|
|
if (net->src_addr_selected == 0) {
|
|
/* strange case here, the INIT
|
|
* should have did the selection.
|
|
*/
|
|
net->_s_addr.sin.sin_addr =
|
|
sctp_ipv4_source_address_selection(inp,
|
|
stcb, &net->ro, net, 0);
|
|
net->src_addr_selected = 1;
|
|
|
|
}
|
|
|
|
stc.laddress[0] = net->_s_addr.sin.sin_addr.s_addr;
|
|
stc.laddress[1] = 0;
|
|
stc.laddress[2] = 0;
|
|
stc.laddress[3] = 0;
|
|
stc.laddr_type = SCTP_IPV4_ADDRESS;
|
|
} else if (to->sa_family == AF_INET6) {
|
|
memcpy(&stc.address, &to->sa_data,
|
|
sizeof(struct in6_addr));
|
|
stc.addr_type = SCTP_IPV6_ADDRESS;
|
|
if (net->src_addr_selected == 0) {
|
|
/* strange case here, the INIT
|
|
* should have did the selection.
|
|
*/
|
|
net->_s_addr.sin6.sin6_addr =
|
|
sctp_ipv6_source_address_selection(inp,
|
|
stcb, &net->ro, net, 0);
|
|
net->src_addr_selected = 1;
|
|
}
|
|
memcpy(&stc.laddress, &net->_s_addr.sin6.sin6_addr,
|
|
sizeof(struct in6_addr));
|
|
stc.laddr_type = SCTP_IPV6_ADDRESS;
|
|
}
|
|
}
|
|
/* Now lets put the SCTP header in place */
|
|
initackm_out = mtod(m, struct sctp_init_msg *);
|
|
initackm_out->sh.src_port = inp->sctp_lport;
|
|
initackm_out->sh.dest_port = sh->src_port;
|
|
initackm_out->sh.v_tag = init_chk->init.initiate_tag;
|
|
/* Save it off for quick ref */
|
|
stc.peers_vtag = init_chk->init.initiate_tag;
|
|
initackm_out->sh.checksum = 0; /* calculate later */
|
|
/* who are we */
|
|
strncpy(stc.identification, SCTP_VERSION_STRING,
|
|
uimin(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
|
|
/* now the chunk header */
|
|
initackm_out->msg.ch.chunk_type = SCTP_INITIATION_ACK;
|
|
initackm_out->msg.ch.chunk_flags = 0;
|
|
/* fill in later from mbuf we build */
|
|
initackm_out->msg.ch.chunk_length = 0;
|
|
/* place in my tag */
|
|
if ((asoc != NULL) &&
|
|
((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
|
|
/* re-use the v-tags and init-seq here */
|
|
initackm_out->msg.init.initiate_tag = htonl(asoc->my_vtag);
|
|
initackm_out->msg.init.initial_tsn = htonl(asoc->init_seq_number);
|
|
} else {
|
|
initackm_out->msg.init.initiate_tag = htonl(sctp_select_a_tag(inp));
|
|
/* get a TSN to use too */
|
|
initackm_out->msg.init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
|
|
}
|
|
/* save away my tag to */
|
|
stc.my_vtag = initackm_out->msg.init.initiate_tag;
|
|
|
|
/* set up some of the credits. */
|
|
initackm_out->msg.init.a_rwnd = htonl(uimax(inp->sctp_socket->so_rcv.sb_hiwat, SCTP_MINIMAL_RWND));
|
|
/* set what I want */
|
|
his_limit = ntohs(init_chk->init.num_inbound_streams);
|
|
/* choose what I want */
|
|
if (asoc != NULL) {
|
|
if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) {
|
|
i_want = asoc->streamoutcnt;
|
|
} else {
|
|
i_want = inp->sctp_ep.pre_open_stream_count;
|
|
}
|
|
} else {
|
|
i_want = inp->sctp_ep.pre_open_stream_count;
|
|
}
|
|
if (his_limit < i_want) {
|
|
/* I Want more :< */
|
|
initackm_out->msg.init.num_outbound_streams = init_chk->init.num_inbound_streams;
|
|
} else {
|
|
/* I can have what I want :> */
|
|
initackm_out->msg.init.num_outbound_streams = htons(i_want);
|
|
}
|
|
/* tell him his limt. */
|
|
initackm_out->msg.init.num_inbound_streams =
|
|
htons(inp->sctp_ep.max_open_streams_intome);
|
|
/* setup the ECN pointer */
|
|
|
|
/* if (inp->sctp_flags & SCTP_PCB_FLAGS_ADAPTIONEVNT) {*/
|
|
if (inp->sctp_ep.adaption_layer_indicator) {
|
|
struct sctp_adaption_layer_indication *ali;
|
|
ali = (struct sctp_adaption_layer_indication *)(
|
|
(vaddr_t)initackm_out + sizeof(*initackm_out));
|
|
ali->ph.param_type = htons(SCTP_ULP_ADAPTION);
|
|
ali->ph.param_length = htons(sizeof(*ali));
|
|
ali->indication = ntohl(inp->sctp_ep.adaption_layer_indicator);
|
|
m->m_len += sizeof(*ali);
|
|
ecn = (struct sctp_ecn_supported_param *)((vaddr_t)ali +
|
|
sizeof(*ali));
|
|
} else {
|
|
ecn = (struct sctp_ecn_supported_param*)(
|
|
(vaddr_t)initackm_out + sizeof(*initackm_out));
|
|
}
|
|
|
|
/* ECN parameter */
|
|
if (sctp_ecn == 1) {
|
|
ecn->ph.param_type = htons(SCTP_ECN_CAPABLE);
|
|
ecn->ph.param_length = htons(sizeof(*ecn));
|
|
m->m_len += sizeof(*ecn);
|
|
|
|
prsctp = (struct sctp_prsctp_supported_param *)((vaddr_t)ecn +
|
|
sizeof(*ecn));
|
|
} else {
|
|
prsctp = (struct sctp_prsctp_supported_param *)((vaddr_t)ecn);
|
|
}
|
|
/* And now tell the peer we do pr-sctp */
|
|
prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED);
|
|
prsctp->ph.param_length = htons(sizeof(*prsctp));
|
|
m->m_len += sizeof(*prsctp);
|
|
|
|
|
|
/* And now tell the peer we do all the extensions */
|
|
pr_supported = (struct sctp_supported_chunk_types_param *)((vaddr_t)prsctp +
|
|
sizeof(*prsctp));
|
|
|
|
pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
|
|
pr_supported->ph.param_length = htons(sizeof(*pr_supported) + SCTP_EXT_COUNT);
|
|
pr_supported->chunk_types[0] = SCTP_ASCONF;
|
|
pr_supported->chunk_types[1] = SCTP_ASCONF_ACK;
|
|
pr_supported->chunk_types[2] = SCTP_FORWARD_CUM_TSN;
|
|
pr_supported->chunk_types[3] = SCTP_PACKET_DROPPED;
|
|
pr_supported->chunk_types[4] = SCTP_STREAM_RESET;
|
|
pr_supported->chunk_types[5] = 0; /* pad */
|
|
pr_supported->chunk_types[6] = 0; /* pad */
|
|
pr_supported->chunk_types[7] = 0; /* pad */
|
|
|
|
m->m_len += (sizeof(*pr_supported) + SCTP_EXT_COUNT + SCTP_PAD_EXT_COUNT);
|
|
if (sctp_ecn_nonce) {
|
|
/* ECN nonce: And now tell the peer we support ECN nonce */
|
|
ecn_nonce = (struct sctp_ecn_nonce_supported_param *)((vaddr_t)pr_supported +
|
|
sizeof(*pr_supported) + SCTP_EXT_COUNT + SCTP_PAD_EXT_COUNT);
|
|
ecn_nonce->ph.param_type = htons(SCTP_ECN_NONCE_SUPPORTED);
|
|
ecn_nonce->ph.param_length = htons(sizeof(*ecn_nonce));
|
|
m->m_len += sizeof(*ecn_nonce);
|
|
}
|
|
|
|
m_at = m;
|
|
/* now the addresses */
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
|
|
struct ifnet *ifn;
|
|
struct ifaddr *ifa;
|
|
int cnt = cnt_inits_to;
|
|
int s;
|
|
|
|
s = pserialize_read_enter();
|
|
IFNET_READER_FOREACH(ifn) {
|
|
if ((stc.loopback_scope == 0) &&
|
|
(ifn->if_type == IFT_LOOP)) {
|
|
/*
|
|
* Skip loopback devices if loopback_scope
|
|
* not set
|
|
*/
|
|
continue;
|
|
}
|
|
IFADDR_READER_FOREACH(ifa, ifn) {
|
|
if (sctp_is_address_in_scope(ifa,
|
|
stc.ipv4_addr_legal, stc.ipv6_addr_legal,
|
|
stc.loopback_scope, stc.ipv4_scope,
|
|
stc.local_scope, stc.site_scope) == 0) {
|
|
continue;
|
|
}
|
|
cnt++;
|
|
}
|
|
}
|
|
pserialize_read_exit(s);
|
|
|
|
if (cnt > 1) {
|
|
s = pserialize_read_enter();
|
|
IFNET_READER_FOREACH(ifn) {
|
|
if ((stc.loopback_scope == 0) &&
|
|
(ifn->if_type == IFT_LOOP)) {
|
|
/*
|
|
* Skip loopback devices if
|
|
* loopback_scope not set
|
|
*/
|
|
continue;
|
|
}
|
|
IFADDR_READER_FOREACH(ifa, ifn) {
|
|
if (sctp_is_address_in_scope(ifa,
|
|
stc.ipv4_addr_legal,
|
|
stc.ipv6_addr_legal,
|
|
stc.loopback_scope, stc.ipv4_scope,
|
|
stc.local_scope, stc.site_scope) == 0) {
|
|
continue;
|
|
}
|
|
m_at = sctp_add_addr_to_mbuf(m_at, ifa);
|
|
}
|
|
}
|
|
pserialize_read_exit(s);
|
|
}
|
|
} else {
|
|
struct sctp_laddr *laddr;
|
|
int cnt;
|
|
cnt = cnt_inits_to;
|
|
/* First, how many ? */
|
|
LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
|
|
if (laddr->ifa == NULL) {
|
|
continue;
|
|
}
|
|
if (laddr->ifa->ifa_addr == NULL)
|
|
continue;
|
|
if (sctp_is_address_in_scope(laddr->ifa,
|
|
stc.ipv4_addr_legal, stc.ipv6_addr_legal,
|
|
stc.loopback_scope, stc.ipv4_scope,
|
|
stc.local_scope, stc.site_scope) == 0) {
|
|
continue;
|
|
}
|
|
cnt++;
|
|
}
|
|
/* If we bind a single address only we won't list
|
|
* any. This way you can get through a NAT
|
|
*/
|
|
if (cnt > 1) {
|
|
LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
|
|
if (laddr->ifa == NULL) {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Help I have fallen and I can't get up!\n");
|
|
}
|
|
#endif
|
|
continue;
|
|
}
|
|
if (laddr->ifa->ifa_addr == NULL)
|
|
continue;
|
|
if (sctp_is_address_in_scope(laddr->ifa,
|
|
stc.ipv4_addr_legal, stc.ipv6_addr_legal,
|
|
stc.loopback_scope, stc.ipv4_scope,
|
|
stc.local_scope, stc.site_scope) == 0) {
|
|
continue;
|
|
}
|
|
m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* tack on the operational error if present */
|
|
if (op_err) {
|
|
if (op_err->m_pkthdr.len % 4) {
|
|
/* must add a pad to the param */
|
|
u_int32_t cpthis=0;
|
|
int padlen;
|
|
padlen = 4 - (op_err->m_pkthdr.len % 4);
|
|
m_copyback(op_err, op_err->m_pkthdr.len, padlen, (void *)&cpthis);
|
|
}
|
|
while (m_at->m_next != NULL) {
|
|
m_at = m_at->m_next;
|
|
}
|
|
m_at->m_next = op_err;
|
|
while (m_at->m_next != NULL) {
|
|
m_at = m_at->m_next;
|
|
}
|
|
}
|
|
/* Get total size of init packet */
|
|
sz_of = SCTP_SIZE32(ntohs(init_chk->ch.chunk_length));
|
|
/* pre-calulate the size and update pkt header and chunk header */
|
|
m->m_pkthdr.len = 0;
|
|
for (m_tmp = m; m_tmp; m_tmp = m_tmp->m_next) {
|
|
m->m_pkthdr.len += m_tmp->m_len;
|
|
if (m_tmp->m_next == NULL) {
|
|
/* m_tmp should now point to last one */
|
|
break;
|
|
}
|
|
}
|
|
/*
|
|
* Figure now the size of the cookie. We know the size of the
|
|
* INIT-ACK. The Cookie is going to be the size of INIT, INIT-ACK,
|
|
* COOKIE-STRUCTURE and SIGNATURE.
|
|
*/
|
|
|
|
/*
|
|
* take our earlier INIT calc and add in the sz we just calculated
|
|
* minus the size of the sctphdr (its not included in chunk size
|
|
*/
|
|
|
|
/* add once for the INIT-ACK */
|
|
sz_of += (m->m_pkthdr.len - sizeof(struct sctphdr));
|
|
|
|
/* add a second time for the INIT-ACK in the cookie */
|
|
sz_of += (m->m_pkthdr.len - sizeof(struct sctphdr));
|
|
|
|
/* Now add the cookie header and cookie message struct */
|
|
sz_of += sizeof(struct sctp_state_cookie_param);
|
|
/* ...and add the size of our signature */
|
|
sz_of += SCTP_SIGNATURE_SIZE;
|
|
initackm_out->msg.ch.chunk_length = htons(sz_of);
|
|
|
|
/* Now we must build a cookie */
|
|
m_cookie = sctp_add_cookie(inp, init_pkt, offset, m,
|
|
sizeof(struct sctphdr), &stc);
|
|
if (m_cookie == NULL) {
|
|
/* memory problem */
|
|
sctp_m_freem(m);
|
|
return;
|
|
}
|
|
/* Now append the cookie to the end and update the space/size */
|
|
m_tmp->m_next = m_cookie;
|
|
|
|
/*
|
|
* We pass 0 here to NOT set IP_DF if its IPv4, we ignore the
|
|
* return here since the timer will drive a retranmission.
|
|
*/
|
|
padval = m->m_pkthdr.len % 4;
|
|
if ((padval) && (m_last)) {
|
|
/* see my previous comments on m_last */
|
|
int ret;
|
|
ret = sctp_add_pad_tombuf(m_last, (4-padval));
|
|
if (ret) {
|
|
/* Houston we have a problem, no space */
|
|
sctp_m_freem(m);
|
|
return;
|
|
}
|
|
m->m_pkthdr.len += padval;
|
|
}
|
|
sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, 0, NULL, 0);
|
|
}
|
|
|
|
|
|
static void
|
|
sctp_insert_on_wheel(struct sctp_association *asoc,
|
|
struct sctp_stream_out *strq)
|
|
{
|
|
struct sctp_stream_out *stre, *strn;
|
|
stre = TAILQ_FIRST(&asoc->out_wheel);
|
|
if (stre == NULL) {
|
|
/* only one on wheel */
|
|
TAILQ_INSERT_HEAD(&asoc->out_wheel, strq, next_spoke);
|
|
return;
|
|
}
|
|
for (; stre; stre = strn) {
|
|
strn = TAILQ_NEXT(stre, next_spoke);
|
|
if (stre->stream_no > strq->stream_no) {
|
|
TAILQ_INSERT_BEFORE(stre, strq, next_spoke);
|
|
return;
|
|
} else if (stre->stream_no == strq->stream_no) {
|
|
/* huh, should not happen */
|
|
return;
|
|
} else if (strn == NULL) {
|
|
/* next one is null */
|
|
TAILQ_INSERT_AFTER(&asoc->out_wheel, stre, strq,
|
|
next_spoke);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
sctp_remove_from_wheel(struct sctp_association *asoc,
|
|
struct sctp_stream_out *strq)
|
|
{
|
|
/* take off and then setup so we know it is not on the wheel */
|
|
TAILQ_REMOVE(&asoc->out_wheel, strq, next_spoke);
|
|
strq->next_spoke.tqe_next = NULL;
|
|
strq->next_spoke.tqe_prev = NULL;
|
|
}
|
|
|
|
|
|
static void
|
|
sctp_prune_prsctp(struct sctp_tcb *stcb,
|
|
struct sctp_association *asoc,
|
|
struct sctp_sndrcvinfo *srcv,
|
|
int dataout
|
|
)
|
|
{
|
|
int freed_spc=0;
|
|
struct sctp_tmit_chunk *chk, *nchk;
|
|
if ((asoc->peer_supports_prsctp) && (asoc->sent_queue_cnt_removeable > 0)) {
|
|
TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
|
|
/*
|
|
* Look for chunks marked with the PR_SCTP
|
|
* flag AND the buffer space flag. If the one
|
|
* being sent is equal or greater priority then
|
|
* purge the old one and free some space.
|
|
*/
|
|
if ((chk->flags & (SCTP_PR_SCTP_ENABLED |
|
|
SCTP_PR_SCTP_BUFFER)) ==
|
|
(SCTP_PR_SCTP_ENABLED|SCTP_PR_SCTP_BUFFER)) {
|
|
/*
|
|
* This one is PR-SCTP AND buffer space
|
|
* limited type
|
|
*/
|
|
if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
|
|
/* Lower numbers equates to
|
|
* higher priority so if the
|
|
* one we are looking at has a
|
|
* larger or equal priority we
|
|
* want to drop the data and
|
|
* NOT retransmit it.
|
|
*/
|
|
if (chk->data) {
|
|
/* We release the
|
|
* book_size if the
|
|
* mbuf is here
|
|
*/
|
|
int ret_spc;
|
|
int cause;
|
|
if (chk->sent > SCTP_DATAGRAM_UNSENT)
|
|
cause = SCTP_RESPONSE_TO_USER_REQ|SCTP_NOTIFY_DATAGRAM_SENT;
|
|
else
|
|
cause = SCTP_RESPONSE_TO_USER_REQ|SCTP_NOTIFY_DATAGRAM_UNSENT;
|
|
ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
|
|
cause,
|
|
&asoc->sent_queue);
|
|
freed_spc += ret_spc;
|
|
if (freed_spc >= dataout) {
|
|
return;
|
|
}
|
|
} /* if chunk was present */
|
|
} /* if of sufficent priority */
|
|
} /* if chunk has enabled */
|
|
} /* tailqforeach */
|
|
|
|
chk = TAILQ_FIRST(&asoc->send_queue);
|
|
while (chk) {
|
|
nchk = TAILQ_NEXT(chk, sctp_next);
|
|
/* Here we must move to the sent queue and mark */
|
|
if ((chk->flags & (SCTP_PR_SCTP_ENABLED |
|
|
SCTP_PR_SCTP_BUFFER)) ==
|
|
(SCTP_PR_SCTP_ENABLED|SCTP_PR_SCTP_BUFFER)) {
|
|
if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
|
|
if (chk->data) {
|
|
/* We release the
|
|
* book_size if the
|
|
* mbuf is here
|
|
*/
|
|
int ret_spc;
|
|
ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
|
|
SCTP_RESPONSE_TO_USER_REQ|SCTP_NOTIFY_DATAGRAM_UNSENT,
|
|
&asoc->send_queue);
|
|
|
|
freed_spc += ret_spc;
|
|
if (freed_spc >= dataout) {
|
|
return;
|
|
}
|
|
} /* end if chk->data */
|
|
} /* end if right class */
|
|
} /* end if chk pr-sctp */
|
|
chk = nchk;
|
|
} /* end while (chk) */
|
|
} /* if enabled in asoc */
|
|
}
|
|
|
|
static void
|
|
sctp_prepare_chunk(struct sctp_tmit_chunk *template,
|
|
struct sctp_tcb *stcb,
|
|
struct sctp_sndrcvinfo *srcv,
|
|
struct sctp_stream_out *strq,
|
|
struct sctp_nets *net)
|
|
{
|
|
memset(template, 0, sizeof(struct sctp_tmit_chunk));
|
|
template->sent = SCTP_DATAGRAM_UNSENT;
|
|
if ((stcb->asoc.peer_supports_prsctp) &&
|
|
(srcv->sinfo_flags & (SCTP_PR_SCTP_TTL|SCTP_PR_SCTP_BUF)) &&
|
|
(srcv->sinfo_timetolive > 0)
|
|
) {
|
|
/* If:
|
|
* Peer supports PR-SCTP
|
|
* The flags is set against this send for PR-SCTP
|
|
* And timetolive is a postive value, zero is reserved
|
|
* to mean a reliable send for both buffer/time
|
|
* related one.
|
|
*/
|
|
if (srcv->sinfo_flags & SCTP_PR_SCTP_BUF) {
|
|
/*
|
|
* Time to live is a priority stored in tv_sec
|
|
* when doing the buffer drop thing.
|
|
*/
|
|
template->rec.data.timetodrop.tv_sec = srcv->sinfo_timetolive;
|
|
} else {
|
|
struct timeval tv;
|
|
|
|
SCTP_GETTIME_TIMEVAL(&template->rec.data.timetodrop);
|
|
tv.tv_sec = srcv->sinfo_timetolive / 1000;
|
|
tv.tv_usec = (srcv->sinfo_timetolive * 1000) % 1000000;
|
|
#ifndef __FreeBSD__
|
|
timeradd(&template->rec.data.timetodrop, &tv,
|
|
&template->rec.data.timetodrop);
|
|
#else
|
|
timevaladd(&template->rec.data.timetodrop, &tv);
|
|
#endif
|
|
}
|
|
}
|
|
if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) {
|
|
template->rec.data.stream_seq = strq->next_sequence_sent;
|
|
} else {
|
|
template->rec.data.stream_seq = 0;
|
|
}
|
|
template->rec.data.TSN_seq = 0; /* not yet assigned */
|
|
|
|
template->rec.data.stream_number = srcv->sinfo_stream;
|
|
template->rec.data.payloadtype = srcv->sinfo_ppid;
|
|
template->rec.data.context = srcv->sinfo_context;
|
|
template->rec.data.doing_fast_retransmit = 0;
|
|
template->rec.data.ect_nonce = 0; /* ECN Nonce */
|
|
|
|
if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
|
|
template->whoTo = net;
|
|
} else {
|
|
if (stcb->asoc.primary_destination)
|
|
template->whoTo = stcb->asoc.primary_destination;
|
|
else {
|
|
/* TSNH */
|
|
template->whoTo = net;
|
|
}
|
|
}
|
|
/* the actual chunk flags */
|
|
if (srcv->sinfo_flags & SCTP_UNORDERED) {
|
|
template->rec.data.rcv_flags = SCTP_DATA_UNORDERED;
|
|
} else {
|
|
template->rec.data.rcv_flags = 0;
|
|
}
|
|
/* no flags yet, FRAGMENT_OK goes here */
|
|
template->flags = 0;
|
|
/* PR sctp flags */
|
|
if (stcb->asoc.peer_supports_prsctp) {
|
|
if (srcv->sinfo_timetolive > 0) {
|
|
/*
|
|
* We only set the flag if timetolive (or
|
|
* priority) was set to a positive number.
|
|
* Zero is reserved specifically to be
|
|
* EXCLUDED and sent reliable.
|
|
*/
|
|
if (srcv->sinfo_flags & SCTP_PR_SCTP_TTL) {
|
|
template->flags |= SCTP_PR_SCTP_ENABLED;
|
|
}
|
|
if (srcv->sinfo_flags & SCTP_PR_SCTP_BUF) {
|
|
template->flags |= SCTP_PR_SCTP_BUFFER;
|
|
}
|
|
}
|
|
}
|
|
template->asoc = &stcb->asoc;
|
|
}
|
|
|
|
|
|
int
|
|
sctp_get_frag_point(struct sctp_tcb *stcb,
|
|
struct sctp_association *asoc)
|
|
{
|
|
int siz, ovh;
|
|
|
|
/* For endpoints that have both 6 and 4 addresses
|
|
* we must reserver room for the 6 ip header, for
|
|
* those that are only dealing with V4 we use
|
|
* a larger frag point.
|
|
*/
|
|
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
|
|
ovh = SCTP_MED_OVERHEAD;
|
|
} else {
|
|
ovh = SCTP_MED_V4_OVERHEAD;
|
|
}
|
|
|
|
if (stcb->sctp_ep->sctp_frag_point > asoc->smallest_mtu)
|
|
siz = asoc->smallest_mtu - ovh;
|
|
else
|
|
siz = (stcb->sctp_ep->sctp_frag_point - ovh);
|
|
/*
|
|
if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) { */
|
|
/* A data chunk MUST fit in a cluster */
|
|
/* siz = (MCLBYTES - sizeof(struct sctp_data_chunk));*/
|
|
/* }*/
|
|
|
|
if (siz % 4) {
|
|
/* make it an even word boundary please */
|
|
siz -= (siz % 4);
|
|
}
|
|
return (siz);
|
|
}
|
|
extern unsigned int sctp_max_chunks_on_queue;
|
|
|
|
#define SBLOCKWAIT(f) (((f)&MSG_DONTWAIT) ? M_NOWAIT : M_WAITOK)
|
|
|
|
static int
|
|
sctp_msg_append(struct sctp_tcb *stcb,
|
|
struct sctp_nets *net,
|
|
struct mbuf *m,
|
|
struct sctp_sndrcvinfo *srcv,
|
|
int flags)
|
|
{
|
|
struct socket *so;
|
|
struct sctp_association *asoc;
|
|
struct sctp_stream_out *strq;
|
|
struct sctp_tmit_chunk *chk;
|
|
struct sctpchunk_listhead tmp;
|
|
struct sctp_tmit_chunk template;
|
|
struct mbuf *n, *mnext;
|
|
struct mbuf *mm;
|
|
unsigned int dataout, siz;
|
|
int mbcnt = 0;
|
|
int mbcnt_e = 0;
|
|
int error = 0;
|
|
|
|
if ((stcb == NULL) || (net == NULL) || (m == NULL) || (srcv == NULL)) {
|
|
/* Software fault, you blew it on the call */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("software error in sctp_msg_append:1\n");
|
|
printf("stcb:%p net:%p m:%p srcv:%p\n",
|
|
stcb, net, m, srcv);
|
|
}
|
|
#endif
|
|
if (m)
|
|
sctp_m_freem(m);
|
|
return (EFAULT);
|
|
}
|
|
so = stcb->sctp_socket;
|
|
asoc = &stcb->asoc;
|
|
if (srcv->sinfo_flags & SCTP_ABORT) {
|
|
if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
|
|
(SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_ECHOED)) {
|
|
/* It has to be up before we abort */
|
|
/* how big is the user initiated abort? */
|
|
if ((m->m_flags & M_PKTHDR) && (m->m_pkthdr.len)) {
|
|
dataout = m->m_pkthdr.len;
|
|
} else {
|
|
/* we must count */
|
|
dataout = 0;
|
|
for (n = m; n; n = n->m_next) {
|
|
dataout += n->m_len;
|
|
}
|
|
}
|
|
M_PREPEND(m, sizeof(struct sctp_paramhdr), M_DONTWAIT);
|
|
if (m) {
|
|
struct sctp_paramhdr *ph;
|
|
m->m_len = sizeof(struct sctp_paramhdr) + dataout;
|
|
ph = mtod(m, struct sctp_paramhdr *);
|
|
ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
|
|
ph->param_length = htons(m->m_len);
|
|
}
|
|
sctp_abort_an_association(stcb->sctp_ep, stcb, SCTP_RESPONSE_TO_USER_REQ, m);
|
|
m = NULL;
|
|
} else {
|
|
/* Only free if we don't send an abort */
|
|
;
|
|
}
|
|
goto out;
|
|
}
|
|
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
|
|
(asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
|
|
/* got data while shutting down */
|
|
error = ECONNRESET;
|
|
goto out;
|
|
}
|
|
|
|
if (srcv->sinfo_stream >= asoc->streamoutcnt) {
|
|
/* Invalid stream number */
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
if (asoc->strmout == NULL) {
|
|
/* huh? software error */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("software error in sctp_msg_append:2\n");
|
|
}
|
|
#endif
|
|
error = EFAULT;
|
|
goto out;
|
|
}
|
|
strq = &asoc->strmout[srcv->sinfo_stream];
|
|
/* how big is it ? */
|
|
if ((m->m_flags & M_PKTHDR) && (m->m_pkthdr.len)) {
|
|
dataout = m->m_pkthdr.len;
|
|
} else {
|
|
/* we must count */
|
|
dataout = 0;
|
|
for (n = m; n; n = n->m_next) {
|
|
dataout += n->m_len;
|
|
}
|
|
}
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Attempt to send out %d bytes\n",
|
|
dataout);
|
|
}
|
|
#endif
|
|
|
|
/* lock the socket buf */
|
|
error = sblock(&so->so_snd, SBLOCKWAIT(flags));
|
|
if (error)
|
|
goto out_locked;
|
|
|
|
if (dataout > so->so_snd.sb_hiwat) {
|
|
/* It will NEVER fit */
|
|
error = EMSGSIZE;
|
|
goto release;
|
|
}
|
|
if ((srcv->sinfo_flags & SCTP_EOF) &&
|
|
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) &&
|
|
(dataout == 0)
|
|
) {
|
|
goto zap_by_it_all;
|
|
}
|
|
if ((so->so_snd.sb_hiwat <
|
|
(dataout + asoc->total_output_queue_size)) ||
|
|
(asoc->chunks_on_out_queue > sctp_max_chunks_on_queue) ||
|
|
(asoc->total_output_mbuf_queue_size >
|
|
so->so_snd.sb_mbmax)
|
|
) {
|
|
/* XXX Buffer space hunt for data to skip */
|
|
if (asoc->peer_supports_prsctp) {
|
|
sctp_prune_prsctp(stcb, asoc, srcv, dataout);
|
|
}
|
|
while ((so->so_snd.sb_hiwat <
|
|
(dataout + asoc->total_output_queue_size)) ||
|
|
(asoc->chunks_on_out_queue > sctp_max_chunks_on_queue) ||
|
|
(asoc->total_output_mbuf_queue_size >
|
|
so->so_snd.sb_mbmax)) {
|
|
struct sctp_inpcb *inp;
|
|
/* Now did we free up enough room? */
|
|
if (so->so_state & SS_NBIO) {
|
|
/* Non-blocking io in place */
|
|
error = EWOULDBLOCK;
|
|
goto release;
|
|
}
|
|
/*
|
|
* We store off a pointer to the endpoint.
|
|
* Since on return from this we must check to
|
|
* see if an so_error is set. If so we may have
|
|
* been reset and our stcb destroyed. Returning
|
|
* an error will cause the correct error return
|
|
* through and fix this all.
|
|
*/
|
|
inp = stcb->sctp_ep;
|
|
/*
|
|
* Not sure how else to do this since
|
|
* the level we suspended at is not
|
|
* known deep down where we are. I will
|
|
* drop to spl0() so that others can
|
|
* get in.
|
|
*/
|
|
|
|
inp->sctp_tcb_at_block = (void *)stcb;
|
|
inp->error_on_block = 0;
|
|
sbunlock(&so->so_snd);
|
|
error = sbwait(&so->so_snd);
|
|
/*
|
|
* XXX: This is ugly but I have
|
|
* recreated most of what goes on to
|
|
* block in the sb. UGHH
|
|
* May want to add the bit about being
|
|
* no longer connected.. but this then
|
|
* further dooms the UDP model NOT to
|
|
* allow this.
|
|
*/
|
|
inp->sctp_tcb_at_block = 0;
|
|
if (inp->error_on_block)
|
|
error = inp->error_on_block;
|
|
if (so->so_error)
|
|
error = so->so_error;
|
|
if (error) {
|
|
goto out_locked;
|
|
}
|
|
error = sblock(&so->so_snd, M_WAITOK);
|
|
if (error)
|
|
goto out_locked;
|
|
/* Otherwise we cycle back and recheck
|
|
* the space
|
|
*/
|
|
#if defined(__FreeBSD__) && __FreeBSD_version >= 502115
|
|
if (so->so_rcv.sb_state & SBS_CANTSENDMORE) {
|
|
#else
|
|
if (so->so_state & SS_CANTSENDMORE) {
|
|
#endif
|
|
error = EPIPE;
|
|
goto release;
|
|
}
|
|
if (so->so_error) {
|
|
error = so->so_error;
|
|
goto release;
|
|
}
|
|
}
|
|
}
|
|
/* If we have a packet header fix it if it was broke */
|
|
if (m->m_flags & M_PKTHDR) {
|
|
m->m_pkthdr.len = dataout;
|
|
}
|
|
/* use the smallest one, user set value or
|
|
* smallest mtu of the asoc
|
|
*/
|
|
siz = sctp_get_frag_point(stcb, asoc);
|
|
if ((dataout) && (dataout <= siz)) {
|
|
/* Fast path */
|
|
chk = (struct sctp_tmit_chunk *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_chunk);
|
|
if (chk == NULL) {
|
|
error = ENOMEM;
|
|
goto release;
|
|
}
|
|
sctp_prepare_chunk(chk, stcb, srcv, strq, net);
|
|
chk->whoTo->ref_count++;
|
|
chk->rec.data.rcv_flags |= SCTP_DATA_NOT_FRAG;
|
|
|
|
/* no flags yet, FRAGMENT_OK goes here */
|
|
sctppcbinfo.ipi_count_chunk++;
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
asoc->chunks_on_out_queue++;
|
|
chk->data = m;
|
|
m = NULL;
|
|
/* Total in the MSIZE */
|
|
for (mm = chk->data; mm; mm = mm->m_next) {
|
|
mbcnt += MSIZE;
|
|
if (mm->m_flags & M_EXT) {
|
|
mbcnt += chk->data->m_ext.ext_size;
|
|
}
|
|
}
|
|
/* fix up the send_size if it is not present */
|
|
chk->send_size = dataout;
|
|
chk->book_size = chk->send_size;
|
|
chk->mbcnt = mbcnt;
|
|
/* ok, we are commited */
|
|
if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) {
|
|
/* bump the ssn if we are unordered. */
|
|
strq->next_sequence_sent++;
|
|
}
|
|
chk->data->m_nextpkt = 0;
|
|
asoc->stream_queue_cnt++;
|
|
TAILQ_INSERT_TAIL(&strq->outqueue, chk, sctp_next);
|
|
/* now check if this stream is on the wheel */
|
|
if ((strq->next_spoke.tqe_next == NULL) &&
|
|
(strq->next_spoke.tqe_prev == NULL)) {
|
|
/* Insert it on the wheel since it is not
|
|
* on it currently
|
|
*/
|
|
sctp_insert_on_wheel(asoc, strq);
|
|
}
|
|
} else if ((dataout) && (dataout > siz)) {
|
|
/* Slow path */
|
|
if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_NO_FRAGMENT) &&
|
|
(dataout > siz)) {
|
|
error = EMSGSIZE;
|
|
goto release;
|
|
}
|
|
/* setup the template */
|
|
sctp_prepare_chunk(&template, stcb, srcv, strq, net);
|
|
|
|
n = m;
|
|
while (dataout > siz) {
|
|
/*
|
|
* We can wait since this is called from the user
|
|
* send side
|
|
*/
|
|
n->m_nextpkt = m_split(n, siz, M_WAIT);
|
|
if (n->m_nextpkt == NULL) {
|
|
error = EFAULT;
|
|
goto release;
|
|
}
|
|
dataout -= siz;
|
|
n = n->m_nextpkt;
|
|
}
|
|
/*
|
|
* ok, now we have a chain on m where m->m_nextpkt points to
|
|
* the next chunk and m/m->m_next chain is the piece to send.
|
|
* We must go through the chains and thread them on to
|
|
* sctp_tmit_chunk chains and place them all on the stream
|
|
* queue, breaking the m->m_nextpkt pointers as we go.
|
|
*/
|
|
n = m;
|
|
TAILQ_INIT(&tmp);
|
|
while (n) {
|
|
/*
|
|
* first go through and allocate a sctp_tmit chunk
|
|
* for each chunk piece
|
|
*/
|
|
chk = (struct sctp_tmit_chunk *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_chunk);
|
|
if (chk == NULL) {
|
|
/*
|
|
* ok we must spin through and dump anything
|
|
* we have allocated and then jump to the
|
|
* no_membad
|
|
*/
|
|
chk = TAILQ_FIRST(&tmp);
|
|
while (chk) {
|
|
TAILQ_REMOVE(&tmp, chk, sctp_next);
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
|
|
sctppcbinfo.ipi_count_chunk--;
|
|
asoc->chunks_on_out_queue--;
|
|
if ((int)sctppcbinfo.ipi_count_chunk < 0) {
|
|
panic("Chunk count is negative");
|
|
}
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
chk = TAILQ_FIRST(&tmp);
|
|
}
|
|
error = ENOMEM;
|
|
goto release;
|
|
}
|
|
sctppcbinfo.ipi_count_chunk++;
|
|
asoc->chunks_on_out_queue++;
|
|
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
*chk = template;
|
|
chk->whoTo->ref_count++;
|
|
chk->data = n;
|
|
/* Total in the MSIZE */
|
|
mbcnt_e = 0;
|
|
for (mm = chk->data; mm; mm = mm->m_next) {
|
|
mbcnt_e += MSIZE;
|
|
if (mm->m_flags & M_EXT) {
|
|
mbcnt_e += chk->data->m_ext.ext_size;
|
|
}
|
|
}
|
|
/* now fix the chk->send_size */
|
|
if (chk->data->m_flags & M_PKTHDR) {
|
|
chk->send_size = chk->data->m_pkthdr.len;
|
|
} else {
|
|
struct mbuf *nn;
|
|
chk->send_size = 0;
|
|
for (nn = chk->data; nn; nn = nn->m_next) {
|
|
chk->send_size += nn->m_len;
|
|
}
|
|
}
|
|
chk->book_size = chk->send_size;
|
|
chk->mbcnt = mbcnt_e;
|
|
mbcnt += mbcnt_e;
|
|
if (chk->flags & SCTP_PR_SCTP_BUFFER) {
|
|
asoc->sent_queue_cnt_removeable++;
|
|
}
|
|
n = n->m_nextpkt;
|
|
TAILQ_INSERT_TAIL(&tmp, chk, sctp_next);
|
|
}
|
|
m = NULL;
|
|
/* now that we have enough space for all de-couple the
|
|
* chain of mbufs by going through our temp array
|
|
* and breaking the pointers.
|
|
*/
|
|
/* ok, we are commited */
|
|
if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) {
|
|
/* bump the ssn if we are unordered. */
|
|
strq->next_sequence_sent++;
|
|
}
|
|
/* Mark the first/last flags. This will
|
|
* result int a 3 for a single item on the list
|
|
*/
|
|
chk = TAILQ_FIRST(&tmp);
|
|
chk->rec.data.rcv_flags |= SCTP_DATA_FIRST_FRAG;
|
|
chk = TAILQ_LAST(&tmp, sctpchunk_listhead);
|
|
chk->rec.data.rcv_flags |= SCTP_DATA_LAST_FRAG;
|
|
/* now break any chains on the queue and
|
|
* move it to the streams actual queue.
|
|
*/
|
|
chk = TAILQ_FIRST(&tmp);
|
|
while (chk) {
|
|
chk->data->m_nextpkt = 0;
|
|
TAILQ_REMOVE(&tmp, chk, sctp_next);
|
|
asoc->stream_queue_cnt++;
|
|
TAILQ_INSERT_TAIL(&strq->outqueue, chk, sctp_next);
|
|
chk = TAILQ_FIRST(&tmp);
|
|
}
|
|
/* now check if this stream is on the wheel */
|
|
if ((strq->next_spoke.tqe_next == NULL) &&
|
|
(strq->next_spoke.tqe_prev == NULL)) {
|
|
/* Insert it on the wheel since it is not
|
|
* on it currently
|
|
*/
|
|
sctp_insert_on_wheel(asoc, strq);
|
|
}
|
|
}
|
|
/* has a SHUTDOWN been (also) requested by the user on this asoc? */
|
|
zap_by_it_all:
|
|
|
|
if ((srcv->sinfo_flags & SCTP_EOF) &&
|
|
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE)) {
|
|
|
|
int some_on_streamwheel = 0;
|
|
|
|
if (!TAILQ_EMPTY(&asoc->out_wheel)) {
|
|
/* Check to see if some data queued */
|
|
struct sctp_stream_out *outs;
|
|
TAILQ_FOREACH(outs, &asoc->out_wheel, next_spoke) {
|
|
if (!TAILQ_EMPTY(&outs->outqueue)) {
|
|
some_on_streamwheel = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (TAILQ_EMPTY(&asoc->send_queue) &&
|
|
TAILQ_EMPTY(&asoc->sent_queue) &&
|
|
(some_on_streamwheel == 0)) {
|
|
/* there is nothing queued to send, so I'm done... */
|
|
if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
|
|
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
|
|
/* only send SHUTDOWN the first time through */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
|
|
printf("%s:%d sends a shutdown\n",
|
|
__FILE__,
|
|
__LINE__
|
|
);
|
|
}
|
|
#endif
|
|
sctp_send_shutdown(stcb, stcb->asoc.primary_destination);
|
|
asoc->state = SCTP_STATE_SHUTDOWN_SENT;
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
|
|
asoc->primary_destination);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
|
|
asoc->primary_destination);
|
|
}
|
|
} else {
|
|
/*
|
|
* we still got (or just got) data to send, so set
|
|
* SHUTDOWN_PENDING
|
|
*/
|
|
asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
|
|
}
|
|
}
|
|
#ifdef SCTP_MBCNT_LOGGING
|
|
sctp_log_mbcnt(SCTP_LOG_MBCNT_INCREASE,
|
|
asoc->total_output_queue_size,
|
|
dataout,
|
|
asoc->total_output_mbuf_queue_size,
|
|
mbcnt);
|
|
#endif
|
|
asoc->total_output_queue_size += dataout;
|
|
asoc->total_output_mbuf_queue_size += mbcnt;
|
|
if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
|
|
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
|
|
so->so_snd.sb_cc += dataout;
|
|
so->so_snd.sb_mbcnt += mbcnt;
|
|
}
|
|
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT2) {
|
|
printf("++total out:%d total_mbuf_out:%d\n",
|
|
(int)asoc->total_output_queue_size,
|
|
(int)asoc->total_output_mbuf_queue_size);
|
|
}
|
|
#endif
|
|
|
|
release:
|
|
sbunlock(&so->so_snd);
|
|
out_locked:
|
|
|
|
out:
|
|
if (m && m->m_nextpkt) {
|
|
n = m;
|
|
while (n) {
|
|
mnext = n->m_nextpkt;
|
|
n->m_nextpkt = NULL;
|
|
sctp_m_freem(n);
|
|
n = mnext;
|
|
}
|
|
} else if (m)
|
|
sctp_m_freem(m);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static struct mbuf *
|
|
sctp_copy_mbufchain(struct mbuf *clonechain,
|
|
struct mbuf *outchain)
|
|
{
|
|
struct mbuf *appendchain;
|
|
#if defined(__FreeBSD__) || defined(__NetBSD__)
|
|
/* Supposedly m_copypacket is an optimization, use it if we can */
|
|
if (clonechain->m_flags & M_PKTHDR) {
|
|
appendchain = m_copypacket(clonechain, M_DONTWAIT);
|
|
sctp_pegs[SCTP_CACHED_SRC]++;
|
|
} else
|
|
appendchain = m_copym(clonechain, 0, M_COPYALL, M_DONTWAIT);
|
|
#elif defined(__APPLE__)
|
|
appendchain = sctp_m_copym(clonechain, 0, M_COPYALL, M_DONTWAIT);
|
|
#else
|
|
appendchain = m_copy(clonechain, 0, M_COPYALL);
|
|
#endif
|
|
|
|
if (appendchain == NULL) {
|
|
/* error */
|
|
if (outchain)
|
|
sctp_m_freem(outchain);
|
|
return (NULL);
|
|
}
|
|
if (outchain) {
|
|
/* tack on to the end */
|
|
struct mbuf *m;
|
|
m = outchain;
|
|
while (m) {
|
|
if (m->m_next == NULL) {
|
|
m->m_next = appendchain;
|
|
break;
|
|
}
|
|
m = m->m_next;
|
|
}
|
|
if (outchain->m_flags & M_PKTHDR) {
|
|
int append_tot;
|
|
struct mbuf *t;
|
|
t = appendchain;
|
|
append_tot = 0;
|
|
while (t) {
|
|
append_tot += t->m_len;
|
|
t = t->m_next;
|
|
}
|
|
outchain->m_pkthdr.len += append_tot;
|
|
}
|
|
return (outchain);
|
|
} else {
|
|
return (appendchain);
|
|
}
|
|
}
|
|
|
|
static void
|
|
sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr, u_int32_t val)
|
|
{
|
|
struct sctp_copy_all *ca;
|
|
struct mbuf *m;
|
|
int turned_on_nonblock=0, ret;
|
|
|
|
ca = (struct sctp_copy_all *)ptr;
|
|
if (ca->m == NULL) {
|
|
return;
|
|
}
|
|
if (ca->inp != inp) {
|
|
/* TSNH */
|
|
return;
|
|
}
|
|
m = sctp_copy_mbufchain(ca->m, NULL);
|
|
if (m == NULL) {
|
|
/* can't copy so we are done */
|
|
ca->cnt_failed++;
|
|
return;
|
|
}
|
|
if ((stcb->sctp_socket->so_state & SS_NBIO) == 0) {
|
|
/* we have to do this non-blocking */
|
|
turned_on_nonblock = 1;
|
|
stcb->sctp_socket->so_state |= SS_NBIO;
|
|
}
|
|
ret = sctp_msg_append(stcb, stcb->asoc.primary_destination, m, &ca->sndrcv, 0);
|
|
if (turned_on_nonblock) {
|
|
/* we turned on non-blocking so turn it off */
|
|
stcb->sctp_socket->so_state &= ~SS_NBIO;
|
|
}
|
|
if (ret) {
|
|
ca->cnt_failed++;
|
|
} else {
|
|
ca->cnt_sent++;
|
|
}
|
|
}
|
|
|
|
static void
|
|
sctp_sendall_completes(void *ptr, u_int32_t val)
|
|
{
|
|
struct sctp_copy_all *ca;
|
|
ca = (struct sctp_copy_all *)ptr;
|
|
/* Do a notify here?
|
|
* Kacheong suggests that the notify
|
|
* be done at the send time.. so you would
|
|
* push up a notification if any send failed.
|
|
* Don't know if this is feasable since the
|
|
* only failures we have is "memory" related and
|
|
* if you cannot get an mbuf to send the data
|
|
* you surely can't get an mbuf to send up
|
|
* to notify the user you can't send the data :->
|
|
*/
|
|
|
|
/* now free everything */
|
|
m_freem(ca->m);
|
|
free(ca, M_PCB);
|
|
}
|
|
|
|
|
|
#define MC_ALIGN(m, len) do { \
|
|
(m)->m_data += (MCLBYTES - (len)) & ~(sizeof(long) - 1); \
|
|
} while (0)
|
|
|
|
|
|
|
|
static struct mbuf *
|
|
sctp_copy_out_all(struct uio *uio, int len)
|
|
{
|
|
struct mbuf *ret, *at;
|
|
int left, willcpy, cancpy, error;
|
|
|
|
MGETHDR(ret, M_WAIT, MT_HEADER);
|
|
if (ret == NULL) {
|
|
/* TSNH */
|
|
return (NULL);
|
|
}
|
|
left = len;
|
|
ret->m_len = 0;
|
|
ret->m_pkthdr.len = len;
|
|
MCLGET(ret, M_WAIT);
|
|
if (ret == NULL) {
|
|
return (NULL);
|
|
}
|
|
if ((ret->m_flags & M_EXT) == 0) {
|
|
m_freem (ret);
|
|
return (NULL);
|
|
}
|
|
cancpy = M_TRAILINGSPACE(ret);
|
|
willcpy = uimin(cancpy, left);
|
|
at = ret;
|
|
while (left > 0) {
|
|
/* Align data to the end */
|
|
MC_ALIGN(at, willcpy);
|
|
error = uiomove(mtod(at, void *), willcpy, uio);
|
|
if (error) {
|
|
err_out_now:
|
|
m_freem(ret);
|
|
return (NULL);
|
|
}
|
|
at->m_len = willcpy;
|
|
at->m_nextpkt = at->m_next = 0;
|
|
left -= willcpy;
|
|
if (left > 0) {
|
|
MGET(at->m_next, M_WAIT, MT_DATA);
|
|
if (at->m_next == NULL) {
|
|
goto err_out_now;
|
|
}
|
|
at = at->m_next;
|
|
at->m_len = 0;
|
|
MCLGET(at, M_WAIT);
|
|
if (at == NULL) {
|
|
goto err_out_now;
|
|
}
|
|
if ((at->m_flags & M_EXT) == 0) {
|
|
goto err_out_now;
|
|
}
|
|
cancpy = M_TRAILINGSPACE(at);
|
|
willcpy = uimin(cancpy, left);
|
|
}
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
sctp_sendall (struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m, struct sctp_sndrcvinfo *srcv)
|
|
{
|
|
int ret;
|
|
struct sctp_copy_all *ca;
|
|
ca = malloc(sizeof(struct sctp_copy_all), M_PCB, M_WAIT);
|
|
if (ca == NULL) {
|
|
m_freem(m);
|
|
return (ENOMEM);
|
|
}
|
|
memset (ca, 0, sizeof(struct sctp_copy_all));
|
|
|
|
ca->inp = inp;
|
|
ca->sndrcv = *srcv;
|
|
/* take off the sendall flag, it would
|
|
* be bad if we failed to do this :-0
|
|
*/
|
|
ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
|
|
|
|
/* get length and mbuf chain */
|
|
if (uio) {
|
|
ca->sndlen = uio->uio_resid;
|
|
ca->m = sctp_copy_out_all(uio, ca->sndlen);
|
|
if (ca->m == NULL) {
|
|
free(ca, M_PCB);
|
|
return (ENOMEM);
|
|
}
|
|
} else {
|
|
if ((m->m_flags & M_PKTHDR) == 0) {
|
|
ca->sndlen = 0;
|
|
while(m) {
|
|
ca->sndlen += m->m_len;
|
|
m = m->m_next;
|
|
}
|
|
} else {
|
|
ca->sndlen = m->m_pkthdr.len;
|
|
}
|
|
ca->m = m;
|
|
}
|
|
|
|
ret = sctp_initiate_iterator(sctp_sendall_iterator, SCTP_PCB_ANY_FLAGS, SCTP_ASOC_ANY_STATE,
|
|
(void *)ca, 0, sctp_sendall_completes, inp);
|
|
if (ret) {
|
|
#ifdef SCTP_DEBUG
|
|
printf("Failed to initate iterator to takeover associations\n");
|
|
#endif
|
|
free(ca, M_PCB);
|
|
return (EFAULT);
|
|
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
|
|
void
|
|
sctp_toss_old_cookies(struct sctp_association *asoc)
|
|
{
|
|
struct sctp_tmit_chunk *chk, *nchk;
|
|
chk = TAILQ_FIRST(&asoc->control_send_queue);
|
|
while (chk) {
|
|
nchk = TAILQ_NEXT(chk, sctp_next);
|
|
if (chk->rec.chunk_id == SCTP_COOKIE_ECHO) {
|
|
TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
|
|
if (chk->data) {
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
}
|
|
asoc->ctrl_queue_cnt--;
|
|
if (chk->whoTo)
|
|
sctp_free_remote_addr(chk->whoTo);
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
|
|
sctppcbinfo.ipi_count_chunk--;
|
|
if ((int)sctppcbinfo.ipi_count_chunk < 0) {
|
|
panic("Chunk count is negative");
|
|
}
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
}
|
|
chk = nchk;
|
|
}
|
|
}
|
|
|
|
void
|
|
sctp_toss_old_asconf(struct sctp_tcb *stcb)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_tmit_chunk *chk, *chk_tmp;
|
|
|
|
asoc = &stcb->asoc;
|
|
for (chk = TAILQ_FIRST(&asoc->control_send_queue); chk != NULL;
|
|
chk = chk_tmp) {
|
|
/* get next chk */
|
|
chk_tmp = TAILQ_NEXT(chk, sctp_next);
|
|
/* find SCTP_ASCONF chunk in queue (only one ever in queue) */
|
|
if (chk->rec.chunk_id == SCTP_ASCONF) {
|
|
TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
|
|
if (chk->data) {
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
}
|
|
asoc->ctrl_queue_cnt--;
|
|
if (chk->whoTo)
|
|
sctp_free_remote_addr(chk->whoTo);
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
|
|
sctppcbinfo.ipi_count_chunk--;
|
|
if ((int)sctppcbinfo.ipi_count_chunk < 0) {
|
|
panic("Chunk count is negative");
|
|
}
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
sctp_clean_up_datalist(struct sctp_tcb *stcb,
|
|
struct sctp_association *asoc,
|
|
struct sctp_tmit_chunk **data_list,
|
|
int bundle_at,
|
|
struct sctp_nets *net)
|
|
{
|
|
int i;
|
|
for (i = 0; i < bundle_at; i++) {
|
|
/* off of the send queue */
|
|
if (i) {
|
|
/* Any chunk NOT 0 you zap the time
|
|
* chunk 0 gets zapped or set based on
|
|
* if a RTO measurment is needed.
|
|
*/
|
|
data_list[i]->do_rtt = 0;
|
|
}
|
|
/* record time */
|
|
data_list[i]->sent_rcv_time = net->last_sent_time;
|
|
TAILQ_REMOVE(&asoc->send_queue,
|
|
data_list[i],
|
|
sctp_next);
|
|
/* on to the sent queue */
|
|
TAILQ_INSERT_TAIL(&asoc->sent_queue,
|
|
data_list[i],
|
|
sctp_next);
|
|
/* This does not lower until the cum-ack passes it */
|
|
asoc->sent_queue_cnt++;
|
|
asoc->send_queue_cnt--;
|
|
if ((asoc->peers_rwnd <= 0) &&
|
|
(asoc->total_flight == 0) &&
|
|
(bundle_at == 1)) {
|
|
/* Mark the chunk as being a window probe */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("WINDOW PROBE SET\n");
|
|
}
|
|
#endif
|
|
sctp_pegs[SCTP_WINDOW_PROBES]++;
|
|
data_list[i]->rec.data.state_flags |= SCTP_WINDOW_PROBE;
|
|
} else {
|
|
data_list[i]->rec.data.state_flags &= ~SCTP_WINDOW_PROBE;
|
|
}
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_audit_log(0xC2, 3);
|
|
#endif
|
|
data_list[i]->sent = SCTP_DATAGRAM_SENT;
|
|
data_list[i]->snd_count = 1;
|
|
net->flight_size += data_list[i]->book_size;
|
|
asoc->total_flight += data_list[i]->book_size;
|
|
asoc->total_flight_count++;
|
|
#ifdef SCTP_LOG_RWND
|
|
sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
|
|
asoc->peers_rwnd , data_list[i]->send_size, sctp_peer_chunk_oh);
|
|
#endif
|
|
asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
|
|
(u_int32_t)(data_list[i]->send_size + sctp_peer_chunk_oh));
|
|
if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
|
|
/* SWS sender side engages */
|
|
asoc->peers_rwnd = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
sctp_clean_up_ctl(struct sctp_association *asoc)
|
|
{
|
|
struct sctp_tmit_chunk *chk, *nchk;
|
|
for (chk = TAILQ_FIRST(&asoc->control_send_queue);
|
|
chk; chk = nchk) {
|
|
nchk = TAILQ_NEXT(chk, sctp_next);
|
|
if ((chk->rec.chunk_id == SCTP_SELECTIVE_ACK) ||
|
|
(chk->rec.chunk_id == SCTP_HEARTBEAT_REQUEST) ||
|
|
(chk->rec.chunk_id == SCTP_HEARTBEAT_ACK) ||
|
|
(chk->rec.chunk_id == SCTP_SHUTDOWN) ||
|
|
(chk->rec.chunk_id == SCTP_SHUTDOWN_ACK) ||
|
|
(chk->rec.chunk_id == SCTP_OPERATION_ERROR) ||
|
|
(chk->rec.chunk_id == SCTP_PACKET_DROPPED) ||
|
|
(chk->rec.chunk_id == SCTP_COOKIE_ACK) ||
|
|
(chk->rec.chunk_id == SCTP_ECN_CWR) ||
|
|
(chk->rec.chunk_id == SCTP_ASCONF_ACK)) {
|
|
/* Stray chunks must be cleaned up */
|
|
clean_up_anyway:
|
|
TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
|
|
if (chk->data) {
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
}
|
|
asoc->ctrl_queue_cnt--;
|
|
sctp_free_remote_addr(chk->whoTo);
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
|
|
sctppcbinfo.ipi_count_chunk--;
|
|
if ((int)sctppcbinfo.ipi_count_chunk < 0) {
|
|
panic("Chunk count is negative");
|
|
}
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
} else if (chk->rec.chunk_id == SCTP_STREAM_RESET) {
|
|
struct sctp_stream_reset_req *strreq;
|
|
/* special handling, we must look into the param */
|
|
strreq = mtod(chk->data, struct sctp_stream_reset_req *);
|
|
if (strreq->sr_req.ph.param_type == ntohs(SCTP_STR_RESET_RESPONSE)) {
|
|
goto clean_up_anyway;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static int
|
|
sctp_move_to_outqueue(struct sctp_tcb *stcb,
|
|
struct sctp_stream_out *strq)
|
|
{
|
|
/* Move from the stream to the send_queue keeping track of the total */
|
|
struct sctp_association *asoc;
|
|
int tot_moved = 0;
|
|
int failed = 0;
|
|
int padval;
|
|
struct sctp_tmit_chunk *chk, *nchk;
|
|
struct sctp_data_chunk *dchkh;
|
|
struct sctpchunk_listhead tmp;
|
|
struct mbuf *orig;
|
|
|
|
asoc = &stcb->asoc;
|
|
TAILQ_INIT(&tmp);
|
|
chk = TAILQ_FIRST(&strq->outqueue);
|
|
while (chk) {
|
|
nchk = TAILQ_NEXT(chk, sctp_next);
|
|
/* now put in the chunk header */
|
|
orig = chk->data;
|
|
M_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_DONTWAIT);
|
|
if (chk->data == NULL) {
|
|
/* HELP */
|
|
failed++;
|
|
break;
|
|
}
|
|
if (orig != chk->data) {
|
|
/* A new mbuf was added, account for it */
|
|
if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
|
|
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
|
|
stcb->sctp_socket->so_snd.sb_mbcnt += MSIZE;
|
|
}
|
|
#ifdef SCTP_MBCNT_LOGGING
|
|
sctp_log_mbcnt(SCTP_LOG_MBCNT_INCREASE,
|
|
asoc->total_output_queue_size,
|
|
0,
|
|
asoc->total_output_mbuf_queue_size,
|
|
MSIZE);
|
|
#endif
|
|
stcb->asoc.total_output_mbuf_queue_size += MSIZE;
|
|
chk->mbcnt += MSIZE;
|
|
}
|
|
chk->send_size += sizeof(struct sctp_data_chunk);
|
|
/* This should NOT have to do anything, but
|
|
* I would rather be cautious
|
|
*/
|
|
if (!failed && ((size_t)chk->data->m_len < sizeof(struct sctp_data_chunk))) {
|
|
m_pullup(chk->data, sizeof(struct sctp_data_chunk));
|
|
if (chk->data == NULL) {
|
|
failed++;
|
|
break;
|
|
}
|
|
}
|
|
dchkh = mtod(chk->data, struct sctp_data_chunk *);
|
|
dchkh->ch.chunk_length = htons(chk->send_size);
|
|
/* Chunks must be padded to even word boundary */
|
|
padval = chk->send_size % 4;
|
|
if (padval) {
|
|
/* For fragmented messages this should not
|
|
* run except possibly on the last chunk
|
|
*/
|
|
if (sctp_pad_lastmbuf(chk->data, (4 - padval))) {
|
|
/* we are in big big trouble no mbufs :< */
|
|
failed++;
|
|
break;
|
|
}
|
|
chk->send_size += (4 - padval);
|
|
}
|
|
/* pull from stream queue */
|
|
TAILQ_REMOVE(&strq->outqueue, chk, sctp_next);
|
|
asoc->stream_queue_cnt--;
|
|
TAILQ_INSERT_TAIL(&tmp, chk, sctp_next);
|
|
/* add it in to the size of moved chunks */
|
|
if (chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) {
|
|
/* we pull only one message */
|
|
break;
|
|
}
|
|
chk = nchk;
|
|
}
|
|
if (failed) {
|
|
/* Gak, we just lost the user message */
|
|
chk = TAILQ_FIRST(&tmp);
|
|
while (chk) {
|
|
nchk = TAILQ_NEXT(chk, sctp_next);
|
|
TAILQ_REMOVE(&tmp, chk, sctp_next);
|
|
|
|
sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
|
|
(SCTP_NOTIFY_DATAGRAM_UNSENT|SCTP_INTERNAL_ERROR),
|
|
chk);
|
|
|
|
if (chk->data) {
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
}
|
|
if (chk->whoTo) {
|
|
sctp_free_remote_addr(chk->whoTo);
|
|
chk->whoTo = NULL;
|
|
}
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
|
|
sctppcbinfo.ipi_count_chunk--;
|
|
if ((int)sctppcbinfo.ipi_count_chunk < 0) {
|
|
panic("Chunk count is negative");
|
|
}
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
chk = nchk;
|
|
}
|
|
return (0);
|
|
}
|
|
/* now pull them off of temp wheel */
|
|
chk = TAILQ_FIRST(&tmp);
|
|
while (chk) {
|
|
nchk = TAILQ_NEXT(chk, sctp_next);
|
|
/* insert on send_queue */
|
|
TAILQ_REMOVE(&tmp, chk, sctp_next);
|
|
TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
|
|
asoc->send_queue_cnt++;
|
|
/* assign TSN */
|
|
chk->rec.data.TSN_seq = asoc->sending_seq++;
|
|
|
|
dchkh = mtod(chk->data, struct sctp_data_chunk *);
|
|
/* Put the rest of the things in place now. Size
|
|
* was done earlier in previous loop prior to
|
|
* padding.
|
|
*/
|
|
dchkh->ch.chunk_type = SCTP_DATA;
|
|
dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
|
|
dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
|
|
dchkh->dp.stream_id = htons(strq->stream_no);
|
|
dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
|
|
dchkh->dp.protocol_id = chk->rec.data.payloadtype;
|
|
/* total count moved */
|
|
tot_moved += chk->send_size;
|
|
chk = nchk;
|
|
}
|
|
return (tot_moved);
|
|
}
|
|
|
|
static void
|
|
sctp_fill_outqueue(struct sctp_tcb *stcb,
|
|
struct sctp_nets *net)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_tmit_chunk *chk;
|
|
struct sctp_stream_out *strq, *strqn;
|
|
int mtu_fromwheel, goal_mtu;
|
|
unsigned int moved, seenend, cnt_mvd=0;
|
|
|
|
asoc = &stcb->asoc;
|
|
/* Attempt to move at least 1 MTU's worth
|
|
* onto the wheel for each destination address
|
|
*/
|
|
goal_mtu = net->cwnd - net->flight_size;
|
|
if ((unsigned int)goal_mtu < net->mtu) {
|
|
goal_mtu = net->mtu;
|
|
}
|
|
if (sctp_pegs[SCTP_MOVED_MTU] < (unsigned int)goal_mtu) {
|
|
sctp_pegs[SCTP_MOVED_MTU] = goal_mtu;
|
|
}
|
|
seenend = moved = mtu_fromwheel = 0;
|
|
if (asoc->last_out_stream == NULL) {
|
|
strq = asoc->last_out_stream = TAILQ_FIRST(&asoc->out_wheel);
|
|
if (asoc->last_out_stream == NULL) {
|
|
/* huh nothing on the wheel, TSNH */
|
|
return;
|
|
}
|
|
goto done_it;
|
|
}
|
|
strq = TAILQ_NEXT(asoc->last_out_stream, next_spoke);
|
|
done_it:
|
|
if (strq == NULL) {
|
|
asoc->last_out_stream = TAILQ_FIRST(&asoc->out_wheel);
|
|
}
|
|
while (mtu_fromwheel < goal_mtu) {
|
|
if (strq == NULL) {
|
|
if (seenend == 0) {
|
|
seenend = 1;
|
|
strq = TAILQ_FIRST(&asoc->out_wheel);
|
|
} else if ((moved == 0) && (seenend)) {
|
|
/* none left on the wheel */
|
|
sctp_pegs[SCTP_MOVED_NLEF]++;
|
|
return;
|
|
} else if (moved) {
|
|
/*
|
|
* clear the flags and rotate back through
|
|
* again
|
|
*/
|
|
moved = 0;
|
|
seenend = 0;
|
|
strq = TAILQ_FIRST(&asoc->out_wheel);
|
|
}
|
|
if (strq == NULL)
|
|
break;
|
|
continue;
|
|
}
|
|
strqn = TAILQ_NEXT(strq, next_spoke);
|
|
if ((chk = TAILQ_FIRST(&strq->outqueue)) == NULL) {
|
|
/* none left on this queue, prune a spoke? */
|
|
sctp_remove_from_wheel(asoc, strq);
|
|
if (strq == asoc->last_out_stream) {
|
|
/* the last one we used went off the wheel */
|
|
asoc->last_out_stream = NULL;
|
|
}
|
|
strq = strqn;
|
|
continue;
|
|
}
|
|
if (chk->whoTo != net) {
|
|
/* Skip this stream, first one on stream
|
|
* does not head to our current destination.
|
|
*/
|
|
strq = strqn;
|
|
continue;
|
|
}
|
|
mtu_fromwheel += sctp_move_to_outqueue(stcb, strq);
|
|
cnt_mvd++;
|
|
moved++;
|
|
asoc->last_out_stream = strq;
|
|
strq = strqn;
|
|
}
|
|
sctp_pegs[SCTP_MOVED_MAX]++;
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("Ok we moved %d chunks to send queue\n",
|
|
moved);
|
|
}
|
|
#endif
|
|
if (sctp_pegs[SCTP_MOVED_QMAX] < cnt_mvd) {
|
|
sctp_pegs[SCTP_MOVED_QMAX] = cnt_mvd;
|
|
}
|
|
}
|
|
|
|
void
|
|
sctp_fix_ecn_echo(struct sctp_association *asoc)
|
|
{
|
|
struct sctp_tmit_chunk *chk;
|
|
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
|
|
if (chk->rec.chunk_id == SCTP_ECN_ECHO) {
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
sctp_move_to_an_alt(struct sctp_tcb *stcb,
|
|
struct sctp_association *asoc,
|
|
struct sctp_nets *net)
|
|
{
|
|
struct sctp_tmit_chunk *chk;
|
|
struct sctp_nets *a_net;
|
|
a_net = sctp_find_alternate_net(stcb, net);
|
|
if ((a_net != net) &&
|
|
((a_net->dest_state & SCTP_ADDR_REACHABLE) == SCTP_ADDR_REACHABLE)) {
|
|
/*
|
|
* We only proceed if a valid alternate is found that is
|
|
* not this one and is reachable. Here we must move all
|
|
* chunks queued in the send queue off of the destination
|
|
* address to our alternate.
|
|
*/
|
|
TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
|
|
if (chk->whoTo == net) {
|
|
/* Move the chunk to our alternate */
|
|
sctp_free_remote_addr(chk->whoTo);
|
|
chk->whoTo = a_net;
|
|
a_net->ref_count++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static int sctp_from_user_send=0;
|
|
|
|
static int
|
|
sctp_med_chunk_output(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb,
|
|
struct sctp_association *asoc,
|
|
int *num_out,
|
|
int *reason_code,
|
|
int control_only, int *cwnd_full, int from_where,
|
|
struct timeval *now, int *now_filled)
|
|
{
|
|
/*
|
|
* Ok this is the generic chunk service queue.
|
|
* we must do the following:
|
|
* - Service the stream queue that is next, moving any message
|
|
* (note I must get a complete message i.e. FIRST/MIDDLE and
|
|
* LAST to the out queue in one pass) and assigning TSN's
|
|
* - Check to see if the cwnd/rwnd allows any output, if so we
|
|
* go ahead and fomulate and send the low level chunks. Making
|
|
* sure to combine any control in the control chunk queue also.
|
|
*/
|
|
struct sctp_nets *net;
|
|
struct mbuf *outchain;
|
|
struct sctp_tmit_chunk *chk, *nchk;
|
|
struct sctphdr *shdr;
|
|
/* temp arrays for unlinking */
|
|
struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
|
|
int no_fragmentflg, error;
|
|
int one_chunk, hbflag;
|
|
int asconf, cookie, no_out_cnt;
|
|
int bundle_at, ctl_cnt, no_data_chunks, cwnd_full_ind;
|
|
unsigned int mtu, r_mtu, omtu;
|
|
*num_out = 0;
|
|
cwnd_full_ind = 0;
|
|
ctl_cnt = no_out_cnt = asconf = cookie = 0;
|
|
/*
|
|
* First lets prime the pump. For each destination, if there
|
|
* is room in the flight size, attempt to pull an MTU's worth
|
|
* out of the stream queues into the general send_queue
|
|
*/
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_audit_log(0xC2, 2);
|
|
#endif
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("***********************\n");
|
|
}
|
|
#endif
|
|
hbflag = 0;
|
|
if (control_only)
|
|
no_data_chunks = 1;
|
|
else
|
|
no_data_chunks = 0;
|
|
|
|
/* Nothing to possible to send? */
|
|
if (TAILQ_EMPTY(&asoc->control_send_queue) &&
|
|
TAILQ_EMPTY(&asoc->send_queue) &&
|
|
TAILQ_EMPTY(&asoc->out_wheel)) {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("All wheels empty\n");
|
|
}
|
|
#endif
|
|
return (0);
|
|
}
|
|
if (asoc->peers_rwnd <= 0) {
|
|
/* No room in peers rwnd */
|
|
*cwnd_full = 1;
|
|
*reason_code = 1;
|
|
if (asoc->total_flight > 0) {
|
|
/* we are allowed one chunk in flight */
|
|
no_data_chunks = 1;
|
|
sctp_pegs[SCTP_RWND_BLOCKED]++;
|
|
}
|
|
}
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("Ok we have done the fillup no_data_chunk=%d tf=%d prw:%d\n",
|
|
(int)no_data_chunks,
|
|
(int)asoc->total_flight, (int)asoc->peers_rwnd);
|
|
}
|
|
#endif
|
|
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("net:%p fs:%d cwnd:%d\n",
|
|
net, net->flight_size, net->cwnd);
|
|
}
|
|
#endif
|
|
if (net->flight_size >= net->cwnd) {
|
|
/* skip this network, no room */
|
|
cwnd_full_ind++;
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("Ok skip fillup->fs:%d > cwnd:%d\n",
|
|
net->flight_size,
|
|
net->cwnd);
|
|
}
|
|
#endif
|
|
sctp_pegs[SCTP_CWND_NOFILL]++;
|
|
continue;
|
|
}
|
|
/*
|
|
* spin through the stream queues moving one message and
|
|
* assign TSN's as appropriate.
|
|
*/
|
|
sctp_fill_outqueue(stcb, net);
|
|
}
|
|
*cwnd_full = cwnd_full_ind;
|
|
/* now service each destination and send out what we can for it */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
int chk_cnt = 0;
|
|
TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
|
|
chk_cnt++;
|
|
}
|
|
printf("We have %d chunks on the send_queue\n", chk_cnt);
|
|
chk_cnt = 0;
|
|
TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
|
|
chk_cnt++;
|
|
}
|
|
printf("We have %d chunks on the sent_queue\n", chk_cnt);
|
|
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
|
|
chk_cnt++;
|
|
}
|
|
printf("We have %d chunks on the control_queue\n", chk_cnt);
|
|
}
|
|
#endif
|
|
/* If we have data to send, and DSACK is running, stop it
|
|
* and build a SACK to dump on to bundle with output. This
|
|
* actually MAY make it so the bundling does not occur if
|
|
* the SACK is big but I think this is ok because basic SACK
|
|
* space is pre-reserved in our fragmentation size choice.
|
|
*/
|
|
if ((TAILQ_FIRST(&asoc->send_queue) != NULL) &&
|
|
(no_data_chunks == 0)) {
|
|
/* We will be sending something */
|
|
if (callout_pending(&stcb->asoc.dack_timer.timer)) {
|
|
/* Yep a callout is pending */
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
|
|
stcb->sctp_ep,
|
|
stcb, NULL);
|
|
sctp_send_sack(stcb);
|
|
}
|
|
}
|
|
/* Nothing to send? */
|
|
if ((TAILQ_FIRST(&asoc->control_send_queue) == NULL) &&
|
|
(TAILQ_FIRST(&asoc->send_queue) == NULL)) {
|
|
return (0);
|
|
}
|
|
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
|
|
struct rtentry *rt;
|
|
/* how much can we send? */
|
|
if (net->ref_count < 2) {
|
|
/* Ref-count of 1 so we cannot have data or control
|
|
* queued to this address. Skip it.
|
|
*/
|
|
continue;
|
|
}
|
|
ctl_cnt = bundle_at = 0;
|
|
outchain = NULL;
|
|
no_fragmentflg = 1;
|
|
one_chunk = 0;
|
|
|
|
rt = rtcache_validate(&net->ro);
|
|
if (rt != NULL) {
|
|
/* if we have a route and an ifp
|
|
* check to see if we have room to
|
|
* send to this guy
|
|
*/
|
|
struct ifnet *ifp;
|
|
ifp = net->ro._ro_rt->rt_ifp;
|
|
if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) {
|
|
sctp_pegs[SCTP_IFP_QUEUE_FULL]++;
|
|
#ifdef SCTP_LOG_MAXBURST
|
|
sctp_log_maxburst(net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED);
|
|
#endif
|
|
rtcache_unref(rt, &net->ro);
|
|
continue;
|
|
}
|
|
rtcache_unref(rt, &net->ro);
|
|
}
|
|
if (((struct sockaddr *)&net->ro.ro_sa)->sa_family == AF_INET) {
|
|
mtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
|
|
} else {
|
|
mtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
|
|
}
|
|
if (mtu > asoc->peers_rwnd) {
|
|
if (asoc->total_flight > 0) {
|
|
/* We have a packet in flight somewhere */
|
|
r_mtu = asoc->peers_rwnd;
|
|
} else {
|
|
/* We are always allowed to send one MTU out */
|
|
one_chunk = 1;
|
|
r_mtu = mtu;
|
|
}
|
|
} else {
|
|
r_mtu = mtu;
|
|
}
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("Ok r_mtu is %d mtu is %d for this net:%p one_chunk:%d\n",
|
|
r_mtu, mtu, net, one_chunk);
|
|
}
|
|
#endif
|
|
/************************/
|
|
/* Control transmission */
|
|
/************************/
|
|
/* Now first lets go through the control queue */
|
|
for (chk = TAILQ_FIRST(&asoc->control_send_queue);
|
|
chk; chk = nchk) {
|
|
nchk = TAILQ_NEXT(chk, sctp_next);
|
|
if (chk->whoTo != net) {
|
|
/*
|
|
* No, not sent to the network we are
|
|
* looking at
|
|
*/
|
|
continue;
|
|
}
|
|
if (chk->data == NULL) {
|
|
continue;
|
|
}
|
|
if ((chk->data->m_flags & M_PKTHDR) == 0) {
|
|
/*
|
|
* NOTE: the chk queue MUST have the PKTHDR
|
|
* flag set on it with a total in the
|
|
* m_pkthdr.len field!! else the chunk will
|
|
* ALWAYS be skipped
|
|
*/
|
|
continue;
|
|
}
|
|
if (chk->sent != SCTP_DATAGRAM_UNSENT) {
|
|
/*
|
|
* It must be unsent. Cookies and ASCONF's
|
|
* hang around but there timers will force
|
|
* when marked for resend.
|
|
*/
|
|
continue;
|
|
}
|
|
/* Here we do NOT factor the r_mtu */
|
|
if ((chk->data->m_pkthdr.len < (int)mtu) ||
|
|
(chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
|
|
/*
|
|
* We probably should glom the mbuf chain from
|
|
* the chk->data for control but the problem
|
|
* is it becomes yet one more level of
|
|
* tracking to do if for some reason output
|
|
* fails. Then I have got to reconstruct the
|
|
* merged control chain.. el yucko.. for now
|
|
* we take the easy way and do the copy
|
|
*/
|
|
outchain = sctp_copy_mbufchain(chk->data,
|
|
outchain);
|
|
if (outchain == NULL) {
|
|
return (ENOMEM);
|
|
}
|
|
/* update our MTU size */
|
|
if (mtu > chk->data->m_pkthdr.len)
|
|
mtu -= chk->data->m_pkthdr.len;
|
|
else
|
|
mtu = 0;
|
|
/* Do clear IP_DF ? */
|
|
if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
|
|
no_fragmentflg = 0;
|
|
}
|
|
/* Mark things to be removed, if needed */
|
|
if ((chk->rec.chunk_id == SCTP_SELECTIVE_ACK) ||
|
|
(chk->rec.chunk_id == SCTP_HEARTBEAT_REQUEST) ||
|
|
(chk->rec.chunk_id == SCTP_HEARTBEAT_ACK) ||
|
|
(chk->rec.chunk_id == SCTP_SHUTDOWN) ||
|
|
(chk->rec.chunk_id == SCTP_SHUTDOWN_ACK) ||
|
|
(chk->rec.chunk_id == SCTP_OPERATION_ERROR) ||
|
|
(chk->rec.chunk_id == SCTP_COOKIE_ACK) ||
|
|
(chk->rec.chunk_id == SCTP_ECN_CWR) ||
|
|
(chk->rec.chunk_id == SCTP_PACKET_DROPPED) ||
|
|
(chk->rec.chunk_id == SCTP_ASCONF_ACK)) {
|
|
|
|
if (chk->rec.chunk_id == SCTP_HEARTBEAT_REQUEST)
|
|
hbflag = 1;
|
|
/* remove these chunks at the end */
|
|
if (chk->rec.chunk_id == SCTP_SELECTIVE_ACK) {
|
|
/* turn off the timer */
|
|
if (callout_pending(&stcb->asoc.dack_timer.timer)) {
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
|
|
inp, stcb, net);
|
|
}
|
|
}
|
|
ctl_cnt++;
|
|
} else {
|
|
/*
|
|
* Other chunks, since they have
|
|
* timers running (i.e. COOKIE or
|
|
* ASCONF) we just "trust" that it
|
|
* gets sent or retransmitted.
|
|
*/
|
|
ctl_cnt++;
|
|
if (chk->rec.chunk_id == SCTP_COOKIE_ECHO) {
|
|
cookie = 1;
|
|
no_out_cnt = 1;
|
|
} else if (chk->rec.chunk_id == SCTP_ASCONF) {
|
|
/*
|
|
* set hb flag since we can use
|
|
* these for RTO
|
|
*/
|
|
hbflag = 1;
|
|
asconf = 1;
|
|
}
|
|
chk->sent = SCTP_DATAGRAM_SENT;
|
|
chk->snd_count++;
|
|
}
|
|
if (mtu == 0) {
|
|
/*
|
|
* Ok we are out of room but we can
|
|
* output without effecting the flight
|
|
* size since this little guy is a
|
|
* control only packet.
|
|
*/
|
|
if (asconf) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
|
|
asconf = 0;
|
|
}
|
|
if (cookie) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
|
|
cookie = 0;
|
|
}
|
|
if (outchain->m_len == 0) {
|
|
/*
|
|
* Special case for when you
|
|
* get a 0 len mbuf at the
|
|
* head due to the lack of a
|
|
* MHDR at the beginning.
|
|
*/
|
|
outchain->m_len = sizeof(struct sctphdr);
|
|
} else {
|
|
M_PREPEND(outchain, sizeof(struct sctphdr), M_DONTWAIT);
|
|
if (outchain == NULL) {
|
|
/* no memory */
|
|
error = ENOBUFS;
|
|
goto error_out_again;
|
|
}
|
|
}
|
|
shdr = mtod(outchain, struct sctphdr *);
|
|
shdr->src_port = inp->sctp_lport;
|
|
shdr->dest_port = stcb->rport;
|
|
shdr->v_tag = htonl(stcb->asoc.peer_vtag);
|
|
shdr->checksum = 0;
|
|
|
|
if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
|
|
rtcache_getdst(&net->ro),
|
|
outchain,
|
|
no_fragmentflg, 0, NULL, asconf))) {
|
|
if (error == ENOBUFS) {
|
|
asoc->ifp_had_enobuf = 1;
|
|
}
|
|
sctp_pegs[SCTP_DATA_OUT_ERR]++;
|
|
if (from_where == 0) {
|
|
sctp_pegs[SCTP_ERROUT_FRM_USR]++;
|
|
}
|
|
error_out_again:
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT2) {
|
|
printf("Gak got ctrl error %d\n", error);
|
|
}
|
|
#endif
|
|
/* error, could not output */
|
|
if (hbflag) {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("Update HB anyway\n");
|
|
}
|
|
#endif
|
|
if (*now_filled == 0) {
|
|
SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
|
|
*now_filled = 1;
|
|
*now = net->last_sent_time;
|
|
} else {
|
|
net->last_sent_time = *now;
|
|
}
|
|
hbflag = 0;
|
|
}
|
|
if (error == EHOSTUNREACH) {
|
|
/*
|
|
* Destination went
|
|
* unreachable during
|
|
* this send
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("Moving data to an alterante\n");
|
|
}
|
|
#endif
|
|
sctp_move_to_an_alt(stcb, asoc, net);
|
|
}
|
|
sctp_clean_up_ctl (asoc);
|
|
return (error);
|
|
} else
|
|
asoc->ifp_had_enobuf = 0;
|
|
/* Only HB or ASCONF advances time */
|
|
if (hbflag) {
|
|
if (*now_filled == 0) {
|
|
SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
|
|
*now_filled = 1;
|
|
*now = net->last_sent_time;
|
|
} else {
|
|
net->last_sent_time = *now;
|
|
}
|
|
hbflag = 0;
|
|
}
|
|
/*
|
|
* increase the number we sent, if a
|
|
* cookie is sent we don't tell them
|
|
* any was sent out.
|
|
*/
|
|
if (!no_out_cnt)
|
|
*num_out += ctl_cnt;
|
|
/* recalc a clean slate and setup */
|
|
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
|
|
mtu = (net->mtu - SCTP_MIN_OVERHEAD);
|
|
} else {
|
|
mtu = (net->mtu - SCTP_MIN_V4_OVERHEAD);
|
|
}
|
|
no_fragmentflg = 1;
|
|
}
|
|
}
|
|
}
|
|
/*********************/
|
|
/* Data transmission */
|
|
/*********************/
|
|
/* now lets add any data within the MTU constraints */
|
|
if (((struct sockaddr *)&net->ro.ro_sa)->sa_family == AF_INET) {
|
|
omtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
|
|
} else {
|
|
omtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
|
|
}
|
|
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("Now to data transmission\n");
|
|
}
|
|
#endif
|
|
|
|
if (((asoc->state & SCTP_STATE_OPEN) == SCTP_STATE_OPEN) ||
|
|
(cookie)) {
|
|
for (chk = TAILQ_FIRST(&asoc->send_queue); chk; chk = nchk) {
|
|
if (no_data_chunks) {
|
|
/* let only control go out */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("Either nothing to send or we are full\n");
|
|
}
|
|
#endif
|
|
break;
|
|
}
|
|
if (net->flight_size >= net->cwnd) {
|
|
/* skip this net, no room for data */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("fs:%d > cwnd:%d\n",
|
|
net->flight_size, net->cwnd);
|
|
}
|
|
#endif
|
|
sctp_pegs[SCTP_CWND_BLOCKED]++;
|
|
*reason_code = 2;
|
|
break;
|
|
}
|
|
nchk = TAILQ_NEXT(chk, sctp_next);
|
|
if (chk->whoTo != net) {
|
|
/* No, not sent to this net */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("chk->whoTo:%p not %p\n",
|
|
chk->whoTo, net);
|
|
|
|
}
|
|
#endif
|
|
continue;
|
|
}
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("Can we pick up a chunk?\n");
|
|
}
|
|
#endif
|
|
if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
|
|
/* strange, we have a chunk that is to bit
|
|
* for its destination and yet no fragment ok flag.
|
|
* Something went wrong when the PMTU changed...we did
|
|
* not mark this chunk for some reason?? I will
|
|
* fix it here by letting IP fragment it for now and
|
|
* printing a warning. This really should not happen ...
|
|
*/
|
|
/*#ifdef SCTP_DEBUG*/
|
|
printf("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
|
|
chk->send_size, mtu);
|
|
/*#endif*/
|
|
chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
|
|
}
|
|
|
|
if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
|
|
((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
|
|
/* ok we will add this one */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("Picking up the chunk\n");
|
|
}
|
|
#endif
|
|
outchain = sctp_copy_mbufchain(chk->data, outchain);
|
|
if (outchain == NULL) {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("Gakk no memory\n");
|
|
}
|
|
#endif
|
|
if (!callout_pending(&net->rxt_timer.timer)) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
|
|
}
|
|
return (ENOMEM);
|
|
}
|
|
/* upate our MTU size */
|
|
/* Do clear IP_DF ? */
|
|
if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
|
|
no_fragmentflg = 0;
|
|
}
|
|
mtu -= chk->send_size;
|
|
r_mtu -= chk->send_size;
|
|
data_list[bundle_at++] = chk;
|
|
if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
|
|
mtu = 0;
|
|
break;
|
|
}
|
|
if (mtu <= 0) {
|
|
mtu = 0;
|
|
break;
|
|
}
|
|
if ((r_mtu <= 0) || one_chunk) {
|
|
r_mtu = 0;
|
|
break;
|
|
}
|
|
} else {
|
|
/*
|
|
* Must be sent in order of the TSN's
|
|
* (on a network)
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("ok no more chk:%d > mtu:%d || < r_mtu:%d\n",
|
|
chk->send_size, mtu, r_mtu);
|
|
}
|
|
#endif
|
|
|
|
break;
|
|
}
|
|
}/* for () */
|
|
} /* if asoc.state OPEN */
|
|
/* Is there something to send for this destination? */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("ok now is chain assembled? %p\n",
|
|
outchain);
|
|
}
|
|
#endif
|
|
|
|
if (outchain) {
|
|
/* We may need to start a control timer or two */
|
|
if (asconf) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
|
|
asconf = 0;
|
|
}
|
|
if (cookie) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
|
|
cookie = 0;
|
|
}
|
|
/* must start a send timer if data is being sent */
|
|
if (bundle_at && (!callout_pending(&net->rxt_timer.timer))) {
|
|
/* no timer running on this destination
|
|
* restart it.
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("ok lets start a send timer .. we will transmit %p\n",
|
|
outchain);
|
|
}
|
|
#endif
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
|
|
}
|
|
/* Now send it, if there is anything to send :> */
|
|
if ((outchain->m_flags & M_PKTHDR) == 0) {
|
|
struct mbuf *t;
|
|
|
|
MGETHDR(t, M_DONTWAIT, MT_HEADER);
|
|
if (t == NULL) {
|
|
sctp_m_freem(outchain);
|
|
return (ENOMEM);
|
|
}
|
|
t->m_next = outchain;
|
|
t->m_pkthdr.len = 0;
|
|
m_reset_rcvif(t);
|
|
t->m_len = 0;
|
|
|
|
outchain = t;
|
|
while (t) {
|
|
outchain->m_pkthdr.len += t->m_len;
|
|
t = t->m_next;
|
|
}
|
|
}
|
|
if (outchain->m_len == 0) {
|
|
/* Special case for when you get a 0 len
|
|
* mbuf at the head due to the lack
|
|
* of a MHDR at the beginning.
|
|
*/
|
|
m_align(outchain, sizeof(struct sctphdr));
|
|
outchain->m_len = sizeof(struct sctphdr);
|
|
} else {
|
|
M_PREPEND(outchain, sizeof(struct sctphdr), M_DONTWAIT);
|
|
if (outchain == NULL) {
|
|
/* out of mbufs */
|
|
error = ENOBUFS;
|
|
goto errored_send;
|
|
}
|
|
}
|
|
shdr = mtod(outchain, struct sctphdr *);
|
|
shdr->src_port = inp->sctp_lport;
|
|
shdr->dest_port = stcb->rport;
|
|
shdr->v_tag = htonl(stcb->asoc.peer_vtag);
|
|
shdr->checksum = 0;
|
|
if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
|
|
rtcache_getdst(&net->ro),
|
|
outchain,
|
|
no_fragmentflg, bundle_at, data_list[0], asconf))) {
|
|
/* error, we could not output */
|
|
if (error == ENOBUFS) {
|
|
asoc->ifp_had_enobuf = 1;
|
|
}
|
|
sctp_pegs[SCTP_DATA_OUT_ERR]++;
|
|
if (from_where == 0) {
|
|
sctp_pegs[SCTP_ERROUT_FRM_USR]++;
|
|
}
|
|
|
|
errored_send:
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("Gak send error %d\n", error);
|
|
}
|
|
#endif
|
|
if (hbflag) {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("Update HB time anyway\n");
|
|
}
|
|
#endif
|
|
if (*now_filled == 0) {
|
|
SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
|
|
*now_filled = 1;
|
|
*now = net->last_sent_time;
|
|
} else {
|
|
net->last_sent_time = *now;
|
|
}
|
|
hbflag = 0;
|
|
}
|
|
if (error == EHOSTUNREACH) {
|
|
/*
|
|
* Destination went unreachable during
|
|
* this send
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("Calling the movement routine\n");
|
|
}
|
|
#endif
|
|
sctp_move_to_an_alt(stcb, asoc, net);
|
|
}
|
|
sctp_clean_up_ctl (asoc);
|
|
return (error);
|
|
} else {
|
|
asoc->ifp_had_enobuf = 0;
|
|
}
|
|
if (bundle_at || hbflag) {
|
|
/* For data/asconf and hb set time */
|
|
if (*now_filled == 0) {
|
|
SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
|
|
*now_filled = 1;
|
|
*now = net->last_sent_time;
|
|
} else {
|
|
net->last_sent_time = *now;
|
|
}
|
|
}
|
|
|
|
if (!no_out_cnt) {
|
|
*num_out += (ctl_cnt + bundle_at);
|
|
}
|
|
if (bundle_at) {
|
|
if (!net->rto_pending) {
|
|
/* setup for a RTO measurement */
|
|
net->rto_pending = 1;
|
|
data_list[0]->do_rtt = 1;
|
|
} else {
|
|
data_list[0]->do_rtt = 0;
|
|
}
|
|
sctp_pegs[SCTP_PEG_TSNS_SENT] += bundle_at;
|
|
sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
|
|
}
|
|
if (one_chunk) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
/* At the end there should be no NON timed
|
|
* chunks hanging on this queue.
|
|
*/
|
|
if ((*num_out == 0) && (*reason_code == 0)) {
|
|
*reason_code = 3;
|
|
}
|
|
sctp_clean_up_ctl (asoc);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
|
|
{
|
|
/* Prepend a OPERATIONAL_ERROR chunk header
|
|
* and put on the end of the control chunk queue.
|
|
*/
|
|
/* Sender had better have gotten a MGETHDR or else
|
|
* the control chunk will be forever skipped
|
|
*/
|
|
struct sctp_chunkhdr *hdr;
|
|
struct sctp_tmit_chunk *chk;
|
|
struct mbuf *mat;
|
|
|
|
chk = (struct sctp_tmit_chunk *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_chunk);
|
|
if (chk == NULL) {
|
|
/* no memory */
|
|
sctp_m_freem(op_err);
|
|
return;
|
|
}
|
|
sctppcbinfo.ipi_count_chunk++;
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
M_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_DONTWAIT);
|
|
if (op_err == NULL) {
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
|
|
sctppcbinfo.ipi_count_chunk--;
|
|
if ((int)sctppcbinfo.ipi_count_chunk < 0) {
|
|
panic("Chunk count is negative");
|
|
}
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
return;
|
|
}
|
|
chk->send_size = 0;
|
|
mat = op_err;
|
|
while (mat != NULL) {
|
|
chk->send_size += mat->m_len;
|
|
mat = mat->m_next;
|
|
}
|
|
chk->rec.chunk_id = SCTP_OPERATION_ERROR;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->flags = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->data = op_err;
|
|
chk->whoTo = chk->asoc->primary_destination;
|
|
chk->whoTo->ref_count++;
|
|
hdr = mtod(op_err, struct sctp_chunkhdr *);
|
|
hdr->chunk_type = SCTP_OPERATION_ERROR;
|
|
hdr->chunk_flags = 0;
|
|
hdr->chunk_length = htons(chk->send_size);
|
|
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue,
|
|
chk,
|
|
sctp_next);
|
|
chk->asoc->ctrl_queue_cnt++;
|
|
}
|
|
|
|
int
|
|
sctp_send_cookie_echo(struct mbuf *m,
|
|
int offset,
|
|
struct sctp_tcb *stcb,
|
|
struct sctp_nets *net)
|
|
{
|
|
/*
|
|
* pull out the cookie and put it at the front of the control
|
|
* chunk queue.
|
|
*/
|
|
int at;
|
|
struct mbuf *cookie, *mat;
|
|
struct sctp_paramhdr parm, *phdr;
|
|
struct sctp_chunkhdr *hdr;
|
|
struct sctp_tmit_chunk *chk;
|
|
uint16_t ptype, plen;
|
|
/* First find the cookie in the param area */
|
|
cookie = NULL;
|
|
at = offset + sizeof(struct sctp_init_chunk);
|
|
|
|
do {
|
|
phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
|
|
if (phdr == NULL) {
|
|
return (-3);
|
|
}
|
|
ptype = ntohs(phdr->param_type);
|
|
plen = ntohs(phdr->param_length);
|
|
if (ptype == SCTP_STATE_COOKIE) {
|
|
int pad;
|
|
/* found the cookie */
|
|
if ((pad = (plen % 4))) {
|
|
plen += 4 - pad;
|
|
}
|
|
cookie = sctp_m_copym(m, at, plen, M_DONTWAIT);
|
|
if (cookie == NULL) {
|
|
/* No memory */
|
|
return (-2);
|
|
}
|
|
break;
|
|
}
|
|
at += SCTP_SIZE32(plen);
|
|
} while (phdr);
|
|
if (cookie == NULL) {
|
|
/* Did not find the cookie */
|
|
return (-3);
|
|
}
|
|
/* ok, we got the cookie lets change it into a cookie echo chunk */
|
|
|
|
/* first the change from param to cookie */
|
|
hdr = mtod(cookie, struct sctp_chunkhdr *);
|
|
hdr->chunk_type = SCTP_COOKIE_ECHO;
|
|
hdr->chunk_flags = 0;
|
|
/* now we MUST have a PKTHDR on it */
|
|
if ((cookie->m_flags & M_PKTHDR) != M_PKTHDR) {
|
|
/* we hope this happens rarely */
|
|
MGETHDR(mat, M_DONTWAIT, MT_HEADER);
|
|
if (mat == NULL) {
|
|
sctp_m_freem(cookie);
|
|
return (-4);
|
|
}
|
|
mat->m_len = 0;
|
|
m_reset_rcvif(mat);
|
|
mat->m_next = cookie;
|
|
cookie = mat;
|
|
}
|
|
cookie->m_pkthdr.len = plen;
|
|
/* get the chunk stuff now and place it in the FRONT of the queue */
|
|
chk = (struct sctp_tmit_chunk *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_chunk);
|
|
if (chk == NULL) {
|
|
/* no memory */
|
|
sctp_m_freem(cookie);
|
|
return (-5);
|
|
}
|
|
sctppcbinfo.ipi_count_chunk++;
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
chk->send_size = cookie->m_pkthdr.len;
|
|
chk->rec.chunk_id = SCTP_COOKIE_ECHO;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->flags = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->data = cookie;
|
|
chk->whoTo = chk->asoc->primary_destination;
|
|
chk->whoTo->ref_count++;
|
|
TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
|
|
chk->asoc->ctrl_queue_cnt++;
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
|
|
struct mbuf *m,
|
|
int offset,
|
|
int chk_length,
|
|
struct sctp_nets *net)
|
|
{
|
|
/* take a HB request and make it into a
|
|
* HB ack and send it.
|
|
*/
|
|
struct mbuf *outchain;
|
|
struct sctp_chunkhdr *chdr;
|
|
struct sctp_tmit_chunk *chk;
|
|
|
|
|
|
if (net == NULL)
|
|
/* must have a net pointer */
|
|
return;
|
|
|
|
outchain = sctp_m_copym(m, offset, chk_length, M_DONTWAIT);
|
|
if (outchain == NULL) {
|
|
/* gak out of memory */
|
|
return;
|
|
}
|
|
chdr = mtod(outchain, struct sctp_chunkhdr *);
|
|
chdr->chunk_type = SCTP_HEARTBEAT_ACK;
|
|
chdr->chunk_flags = 0;
|
|
if ((outchain->m_flags & M_PKTHDR) != M_PKTHDR) {
|
|
/* should not happen but we are cautious. */
|
|
struct mbuf *tmp;
|
|
MGETHDR(tmp, M_DONTWAIT, MT_HEADER);
|
|
if (tmp == NULL) {
|
|
return;
|
|
}
|
|
tmp->m_len = 0;
|
|
m_reset_rcvif(tmp);
|
|
tmp->m_next = outchain;
|
|
outchain = tmp;
|
|
}
|
|
outchain->m_pkthdr.len = chk_length;
|
|
if (chk_length % 4) {
|
|
/* need pad */
|
|
u_int32_t cpthis=0;
|
|
int padlen;
|
|
padlen = 4 - (outchain->m_pkthdr.len % 4);
|
|
m_copyback(outchain, outchain->m_pkthdr.len, padlen, (void *)&cpthis);
|
|
}
|
|
chk = (struct sctp_tmit_chunk *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_chunk);
|
|
if (chk == NULL) {
|
|
/* no memory */
|
|
sctp_m_freem(outchain);
|
|
return ;
|
|
}
|
|
sctppcbinfo.ipi_count_chunk++;
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
|
|
chk->send_size = chk_length;
|
|
chk->rec.chunk_id = SCTP_HEARTBEAT_ACK;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->flags = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->data = outchain;
|
|
chk->whoTo = net;
|
|
chk->whoTo->ref_count++;
|
|
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
|
|
chk->asoc->ctrl_queue_cnt++;
|
|
}
|
|
|
|
int
|
|
sctp_send_cookie_ack(struct sctp_tcb *stcb) {
|
|
/* formulate and queue a cookie-ack back to sender */
|
|
struct mbuf *cookie_ack;
|
|
struct sctp_chunkhdr *hdr;
|
|
struct sctp_tmit_chunk *chk;
|
|
|
|
cookie_ack = NULL;
|
|
MGETHDR(cookie_ack, M_DONTWAIT, MT_HEADER);
|
|
if (cookie_ack == NULL) {
|
|
/* no mbuf's */
|
|
return (-1);
|
|
}
|
|
cookie_ack->m_data += SCTP_MIN_OVERHEAD;
|
|
chk = (struct sctp_tmit_chunk *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_chunk);
|
|
if (chk == NULL) {
|
|
/* no memory */
|
|
sctp_m_freem(cookie_ack);
|
|
return (-1);
|
|
}
|
|
sctppcbinfo.ipi_count_chunk++;
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
|
|
chk->send_size = sizeof(struct sctp_chunkhdr);
|
|
chk->rec.chunk_id = SCTP_COOKIE_ACK;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->flags = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->data = cookie_ack;
|
|
if (chk->asoc->last_control_chunk_from != NULL) {
|
|
chk->whoTo = chk->asoc->last_control_chunk_from;
|
|
} else {
|
|
chk->whoTo = chk->asoc->primary_destination;
|
|
}
|
|
chk->whoTo->ref_count++;
|
|
hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
|
|
hdr->chunk_type = SCTP_COOKIE_ACK;
|
|
hdr->chunk_flags = 0;
|
|
hdr->chunk_length = htons(chk->send_size);
|
|
cookie_ack->m_pkthdr.len = cookie_ack->m_len = chk->send_size;
|
|
m_reset_rcvif(cookie_ack);
|
|
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
|
|
chk->asoc->ctrl_queue_cnt++;
|
|
return (0);
|
|
}
|
|
|
|
|
|
int
|
|
sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
|
|
{
|
|
/* formulate and queue a SHUTDOWN-ACK back to the sender */
|
|
struct mbuf *m_shutdown_ack;
|
|
struct sctp_shutdown_ack_chunk *ack_cp;
|
|
struct sctp_tmit_chunk *chk;
|
|
|
|
m_shutdown_ack = NULL;
|
|
MGETHDR(m_shutdown_ack, M_DONTWAIT, MT_HEADER);
|
|
if (m_shutdown_ack == NULL) {
|
|
/* no mbuf's */
|
|
return (-1);
|
|
}
|
|
m_shutdown_ack->m_data += SCTP_MIN_OVERHEAD;
|
|
chk = (struct sctp_tmit_chunk *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_chunk);
|
|
if (chk == NULL) {
|
|
/* no memory */
|
|
sctp_m_freem(m_shutdown_ack);
|
|
return (-1);
|
|
}
|
|
sctppcbinfo.ipi_count_chunk++;
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
|
|
chk->send_size = sizeof(struct sctp_chunkhdr);
|
|
chk->rec.chunk_id = SCTP_SHUTDOWN_ACK;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->flags = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->data = m_shutdown_ack;
|
|
chk->whoTo = net;
|
|
net->ref_count++;
|
|
|
|
ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
|
|
ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
|
|
ack_cp->ch.chunk_flags = 0;
|
|
ack_cp->ch.chunk_length = htons(chk->send_size);
|
|
m_shutdown_ack->m_pkthdr.len = m_shutdown_ack->m_len = chk->send_size;
|
|
m_reset_rcvif(m_shutdown_ack);
|
|
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
|
|
chk->asoc->ctrl_queue_cnt++;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
|
|
{
|
|
/* formulate and queue a SHUTDOWN to the sender */
|
|
struct mbuf *m_shutdown;
|
|
struct sctp_shutdown_chunk *shutdown_cp;
|
|
struct sctp_tmit_chunk *chk;
|
|
|
|
m_shutdown = NULL;
|
|
MGETHDR(m_shutdown, M_DONTWAIT, MT_HEADER);
|
|
if (m_shutdown == NULL) {
|
|
/* no mbuf's */
|
|
return (-1);
|
|
}
|
|
m_shutdown->m_data += SCTP_MIN_OVERHEAD;
|
|
chk = (struct sctp_tmit_chunk *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_chunk);
|
|
if (chk == NULL) {
|
|
/* no memory */
|
|
sctp_m_freem(m_shutdown);
|
|
return (-1);
|
|
}
|
|
sctppcbinfo.ipi_count_chunk++;
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
|
|
chk->send_size = sizeof(struct sctp_shutdown_chunk);
|
|
chk->rec.chunk_id = SCTP_SHUTDOWN;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->flags = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->data = m_shutdown;
|
|
chk->whoTo = net;
|
|
net->ref_count++;
|
|
|
|
shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
|
|
shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
|
|
shutdown_cp->ch.chunk_flags = 0;
|
|
shutdown_cp->ch.chunk_length = htons(chk->send_size);
|
|
shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
|
|
m_shutdown->m_pkthdr.len = m_shutdown->m_len = chk->send_size;
|
|
m_reset_rcvif(m_shutdown);
|
|
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
|
|
chk->asoc->ctrl_queue_cnt++;
|
|
|
|
if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
|
|
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
|
|
stcb->sctp_ep->sctp_socket->so_snd.sb_cc = 0;
|
|
soisdisconnecting(stcb->sctp_ep->sctp_socket);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net)
|
|
{
|
|
/*
|
|
* formulate and queue an ASCONF to the peer
|
|
* ASCONF parameters should be queued on the assoc queue
|
|
*/
|
|
struct sctp_tmit_chunk *chk;
|
|
struct mbuf *m_asconf;
|
|
|
|
/* compose an ASCONF chunk, maximum length is PMTU */
|
|
m_asconf = sctp_compose_asconf(stcb);
|
|
if (m_asconf == NULL) {
|
|
return (-1);
|
|
}
|
|
chk = (struct sctp_tmit_chunk *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_chunk);
|
|
if (chk == NULL) {
|
|
/* no memory */
|
|
sctp_m_freem(m_asconf);
|
|
return (-1);
|
|
}
|
|
sctppcbinfo.ipi_count_chunk++;
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
|
|
chk->data = m_asconf;
|
|
chk->send_size = m_asconf->m_pkthdr.len;
|
|
chk->rec.chunk_id = SCTP_ASCONF;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->flags = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->whoTo = chk->asoc->primary_destination;
|
|
chk->whoTo->ref_count++;
|
|
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
|
|
chk->asoc->ctrl_queue_cnt++;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
sctp_send_asconf_ack(struct sctp_tcb *stcb, uint32_t retrans)
|
|
{
|
|
/*
|
|
* formulate and queue a asconf-ack back to sender
|
|
* the asconf-ack must be stored in the tcb
|
|
*/
|
|
struct sctp_tmit_chunk *chk;
|
|
struct mbuf *m_ack;
|
|
|
|
/* is there a asconf-ack mbuf chain to send? */
|
|
if (stcb->asoc.last_asconf_ack_sent == NULL) {
|
|
return (-1);
|
|
}
|
|
|
|
/* copy the asconf_ack */
|
|
#if defined(__FreeBSD__) || defined(__NetBSD__)
|
|
/* Supposedly the m_copypacket is a optimzation,
|
|
* use it if we can.
|
|
*/
|
|
if (stcb->asoc.last_asconf_ack_sent->m_flags & M_PKTHDR) {
|
|
m_ack = m_copypacket(stcb->asoc.last_asconf_ack_sent, M_DONTWAIT);
|
|
sctp_pegs[SCTP_CACHED_SRC]++;
|
|
} else
|
|
m_ack = m_copym(stcb->asoc.last_asconf_ack_sent, 0, M_COPYALL, M_DONTWAIT);
|
|
#else
|
|
m_ack = m_copy(stcb->asoc.last_asconf_ack_sent, 0, M_COPYALL);
|
|
#endif
|
|
if (m_ack == NULL) {
|
|
/* couldn't copy it */
|
|
|
|
return (-1);
|
|
}
|
|
chk = (struct sctp_tmit_chunk *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_chunk);
|
|
if (chk == NULL) {
|
|
/* no memory */
|
|
if (m_ack)
|
|
sctp_m_freem(m_ack);
|
|
return (-1);
|
|
}
|
|
sctppcbinfo.ipi_count_chunk++;
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
|
|
/* figure out where it goes to */
|
|
if (retrans) {
|
|
/* we're doing a retransmission */
|
|
if (stcb->asoc.used_alt_asconfack > 2) {
|
|
/* tried alternate nets already, go back */
|
|
chk->whoTo = NULL;
|
|
} else {
|
|
/* need to try and alternate net */
|
|
chk->whoTo = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from);
|
|
stcb->asoc.used_alt_asconfack++;
|
|
}
|
|
if (chk->whoTo == NULL) {
|
|
/* no alternate */
|
|
if (stcb->asoc.last_control_chunk_from == NULL)
|
|
chk->whoTo = stcb->asoc.primary_destination;
|
|
else
|
|
chk->whoTo = stcb->asoc.last_control_chunk_from;
|
|
stcb->asoc.used_alt_asconfack = 0;
|
|
}
|
|
} else {
|
|
/* normal case */
|
|
if (stcb->asoc.last_control_chunk_from == NULL)
|
|
chk->whoTo = stcb->asoc.primary_destination;
|
|
else
|
|
chk->whoTo = stcb->asoc.last_control_chunk_from;
|
|
stcb->asoc.used_alt_asconfack = 0;
|
|
}
|
|
chk->data = m_ack;
|
|
chk->send_size = m_ack->m_pkthdr.len;
|
|
chk->rec.chunk_id = SCTP_ASCONF_ACK;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->flags = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->whoTo->ref_count++;
|
|
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
|
|
chk->asoc->ctrl_queue_cnt++;
|
|
return (0);
|
|
}
|
|
|
|
|
|
static int
|
|
sctp_chunk_retransmission(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb,
|
|
struct sctp_association *asoc,
|
|
int *cnt_out, struct timeval *now, int *now_filled)
|
|
{
|
|
/*
|
|
* send out one MTU of retransmission.
|
|
* If fast_retransmit is happening we ignore the cwnd.
|
|
* Otherwise we obey the cwnd and rwnd.
|
|
* For a Cookie or Asconf in the control chunk queue we retransmit
|
|
* them by themselves.
|
|
*
|
|
* For data chunks we will pick out the lowest TSN's in the
|
|
* sent_queue marked for resend and bundle them all together
|
|
* (up to a MTU of destination). The address to send to should
|
|
* have been selected/changed where the retransmission was
|
|
* marked (i.e. in FR or t3-timeout routines).
|
|
*/
|
|
struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
|
|
struct sctp_tmit_chunk *chk, *fwd;
|
|
struct mbuf *m;
|
|
struct sctphdr *shdr;
|
|
int asconf;
|
|
struct sctp_nets *net;
|
|
int no_fragmentflg, bundle_at, cnt_thru;
|
|
unsigned int mtu;
|
|
int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
|
|
|
|
tmr_started = ctl_cnt = bundle_at = error = 0;
|
|
no_fragmentflg = 1;
|
|
asconf = 0;
|
|
fwd_tsn = 0;
|
|
*cnt_out = 0;
|
|
fwd = NULL;
|
|
m = NULL;
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_audit_log(0xC3, 1);
|
|
#endif
|
|
if (TAILQ_EMPTY(&asoc->sent_queue)) {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("SCTP hits empty queue with cnt set to %d?\n",
|
|
asoc->sent_queue_retran_cnt);
|
|
}
|
|
#endif
|
|
asoc->sent_queue_cnt = 0;
|
|
asoc->sent_queue_cnt_removeable = 0;
|
|
}
|
|
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
|
|
if (chk->sent != SCTP_DATAGRAM_RESEND) {
|
|
/* we only worry about things marked for resend */
|
|
continue;
|
|
}
|
|
if ((chk->rec.chunk_id == SCTP_COOKIE_ECHO) ||
|
|
(chk->rec.chunk_id == SCTP_ASCONF) ||
|
|
(chk->rec.chunk_id == SCTP_STREAM_RESET) ||
|
|
(chk->rec.chunk_id == SCTP_FORWARD_CUM_TSN)) {
|
|
if (chk->rec.chunk_id == SCTP_STREAM_RESET) {
|
|
/* For stream reset we only retran the request
|
|
* not the response.
|
|
*/
|
|
struct sctp_stream_reset_req *strreq;
|
|
strreq = mtod(chk->data, struct sctp_stream_reset_req *);
|
|
if (strreq->sr_req.ph.param_type != ntohs(SCTP_STR_RESET_REQUEST)) {
|
|
continue;
|
|
}
|
|
}
|
|
ctl_cnt++;
|
|
if (chk->rec.chunk_id == SCTP_ASCONF) {
|
|
no_fragmentflg = 1;
|
|
asconf = 1;
|
|
}
|
|
if (chk->rec.chunk_id == SCTP_FORWARD_CUM_TSN) {
|
|
fwd_tsn = 1;
|
|
fwd = chk;
|
|
}
|
|
m = sctp_copy_mbufchain(chk->data, m);
|
|
break;
|
|
}
|
|
}
|
|
one_chunk = 0;
|
|
cnt_thru = 0;
|
|
/* do we have control chunks to retransmit? */
|
|
if (m != NULL) {
|
|
/* Start a timer no matter if we suceed or fail */
|
|
if (chk->rec.chunk_id == SCTP_COOKIE_ECHO) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
|
|
} else if (chk->rec.chunk_id == SCTP_ASCONF)
|
|
sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
|
|
|
|
if (m->m_len == 0) {
|
|
/* Special case for when you get a 0 len
|
|
* mbuf at the head due to the lack
|
|
* of a MHDR at the beginning.
|
|
*/
|
|
m->m_len = sizeof(struct sctphdr);
|
|
} else {
|
|
M_PREPEND(m, sizeof(struct sctphdr), M_DONTWAIT);
|
|
if (m == NULL) {
|
|
return (ENOBUFS);
|
|
}
|
|
}
|
|
shdr = mtod(m, struct sctphdr *);
|
|
shdr->src_port = inp->sctp_lport;
|
|
shdr->dest_port = stcb->rport;
|
|
shdr->v_tag = htonl(stcb->asoc.peer_vtag);
|
|
shdr->checksum = 0;
|
|
chk->snd_count++; /* update our count */
|
|
|
|
if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
|
|
rtcache_getdst(&chk->whoTo->ro), m,
|
|
no_fragmentflg, 0, NULL, asconf))) {
|
|
sctp_pegs[SCTP_DATA_OUT_ERR]++;
|
|
return (error);
|
|
}
|
|
/*
|
|
*We don't want to mark the net->sent time here since this
|
|
* we use this for HB and retrans cannot measure RTT
|
|
*/
|
|
/* SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time);*/
|
|
*cnt_out += 1;
|
|
chk->sent = SCTP_DATAGRAM_SENT;
|
|
sctp_ucount_decr(asoc->sent_queue_retran_cnt);
|
|
if (fwd_tsn == 0) {
|
|
return (0);
|
|
} else {
|
|
/* Clean up the fwd-tsn list */
|
|
sctp_clean_up_ctl (asoc);
|
|
return (0);
|
|
}
|
|
}
|
|
/* Ok, it is just data retransmission we need to do or
|
|
* that and a fwd-tsn with it all.
|
|
*/
|
|
if (TAILQ_EMPTY(&asoc->sent_queue)) {
|
|
return (-1);
|
|
}
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Normal chunk retransmission cnt:%d\n",
|
|
asoc->sent_queue_retran_cnt);
|
|
}
|
|
#endif
|
|
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
|
|
/* not yet open, resend the cookie and that is it */
|
|
return (1);
|
|
}
|
|
|
|
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_auditing(20, inp, stcb, NULL);
|
|
#endif
|
|
TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
|
|
if (chk->sent != SCTP_DATAGRAM_RESEND) {
|
|
/* No, not sent to this net or not ready for rtx */
|
|
continue;
|
|
|
|
}
|
|
/* pick up the net */
|
|
net = chk->whoTo;
|
|
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
|
|
mtu = (net->mtu - SCTP_MIN_OVERHEAD);
|
|
} else {
|
|
mtu = net->mtu- SCTP_MIN_V4_OVERHEAD;
|
|
}
|
|
|
|
if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
|
|
/* No room in peers rwnd */
|
|
uint32_t tsn;
|
|
tsn = asoc->last_acked_seq + 1;
|
|
if (tsn == chk->rec.data.TSN_seq) {
|
|
/* we make a special exception for this case.
|
|
* The peer has no rwnd but is missing the
|
|
* lowest chunk.. which is probably what is
|
|
* holding up the rwnd.
|
|
*/
|
|
goto one_chunk_around;
|
|
}
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("blocked-peers_rwnd:%d tf:%d\n",
|
|
(int)asoc->peers_rwnd,
|
|
(int)asoc->total_flight);
|
|
}
|
|
#endif
|
|
sctp_pegs[SCTP_RWND_BLOCKED]++;
|
|
return (1);
|
|
}
|
|
one_chunk_around:
|
|
if (asoc->peers_rwnd < mtu) {
|
|
one_chunk = 1;
|
|
}
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_audit_log(0xC3, 2);
|
|
#endif
|
|
bundle_at = 0;
|
|
m = NULL;
|
|
net->fast_retran_ip = 0;
|
|
if (chk->rec.data.doing_fast_retransmit == 0) {
|
|
/* if no FR in progress skip destination that
|
|
* have flight_size > cwnd.
|
|
*/
|
|
if (net->flight_size >= net->cwnd) {
|
|
sctp_pegs[SCTP_CWND_BLOCKED]++;
|
|
continue;
|
|
}
|
|
} else {
|
|
/* Mark the destination net to have FR recovery
|
|
* limits put on it.
|
|
*/
|
|
net->fast_retran_ip = 1;
|
|
}
|
|
|
|
if ((chk->send_size <= mtu) || (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
|
|
/* ok we will add this one */
|
|
m = sctp_copy_mbufchain(chk->data, m);
|
|
if (m == NULL) {
|
|
return (ENOMEM);
|
|
}
|
|
/* upate our MTU size */
|
|
/* Do clear IP_DF ? */
|
|
if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
|
|
no_fragmentflg = 0;
|
|
}
|
|
mtu -= chk->send_size;
|
|
data_list[bundle_at++] = chk;
|
|
if (one_chunk && (asoc->total_flight <= 0)) {
|
|
sctp_pegs[SCTP_WINDOW_PROBES]++;
|
|
chk->rec.data.state_flags |= SCTP_WINDOW_PROBE;
|
|
}
|
|
}
|
|
if (one_chunk == 0) {
|
|
/* now are there anymore forward from chk to pick up?*/
|
|
fwd = TAILQ_NEXT(chk, sctp_next);
|
|
while (fwd) {
|
|
if (fwd->sent != SCTP_DATAGRAM_RESEND) {
|
|
/* Nope, not for retran */
|
|
fwd = TAILQ_NEXT(fwd, sctp_next);
|
|
continue;
|
|
}
|
|
if (fwd->whoTo != net) {
|
|
/* Nope, not the net in question */
|
|
fwd = TAILQ_NEXT(fwd, sctp_next);
|
|
continue;
|
|
}
|
|
if (fwd->send_size <= mtu) {
|
|
m = sctp_copy_mbufchain(fwd->data, m);
|
|
if (m == NULL) {
|
|
return (ENOMEM);
|
|
}
|
|
/* upate our MTU size */
|
|
/* Do clear IP_DF ? */
|
|
if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
|
|
no_fragmentflg = 0;
|
|
}
|
|
mtu -= fwd->send_size;
|
|
data_list[bundle_at++] = fwd;
|
|
if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
|
|
break;
|
|
}
|
|
fwd = TAILQ_NEXT(fwd, sctp_next);
|
|
} else {
|
|
/* can't fit so we are done */
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
/* Is there something to send for this destination? */
|
|
if (m) {
|
|
/* No matter if we fail/or suceed we should
|
|
* start a timer. A failure is like a lost
|
|
* IP packet :-)
|
|
*/
|
|
if (!callout_pending(&net->rxt_timer.timer)) {
|
|
/* no timer running on this destination
|
|
* restart it.
|
|
*/
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
|
|
tmr_started = 1;
|
|
}
|
|
if (m->m_len == 0) {
|
|
/* Special case for when you get a 0 len
|
|
* mbuf at the head due to the lack
|
|
* of a MHDR at the beginning.
|
|
*/
|
|
m->m_len = sizeof(struct sctphdr);
|
|
} else {
|
|
M_PREPEND(m, sizeof(struct sctphdr), M_DONTWAIT);
|
|
if (m == NULL) {
|
|
return (ENOBUFS);
|
|
}
|
|
}
|
|
shdr = mtod(m, struct sctphdr *);
|
|
shdr->src_port = inp->sctp_lport;
|
|
shdr->dest_port = stcb->rport;
|
|
shdr->v_tag = htonl(stcb->asoc.peer_vtag);
|
|
shdr->checksum = 0;
|
|
|
|
/* Now lets send it, if there is anything to send :> */
|
|
if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
|
|
rtcache_getdst(&net->ro),
|
|
m,
|
|
no_fragmentflg, 0, NULL, asconf))) {
|
|
/* error, we could not output */
|
|
sctp_pegs[SCTP_DATA_OUT_ERR]++;
|
|
return (error);
|
|
}
|
|
/* For HB's */
|
|
/*
|
|
* We don't want to mark the net->sent time here since
|
|
* this we use this for HB and retrans cannot measure
|
|
* RTT
|
|
*/
|
|
/* SCTP_GETTIME_TIMEVAL(&net->last_sent_time);*/
|
|
|
|
/* For auto-close */
|
|
cnt_thru++;
|
|
if (*now_filled == 0) {
|
|
SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
|
|
*now = asoc->time_last_sent;
|
|
*now_filled = 1;
|
|
} else {
|
|
asoc->time_last_sent = *now;
|
|
}
|
|
*cnt_out += bundle_at;
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_audit_log(0xC4, bundle_at);
|
|
#endif
|
|
for (i = 0; i < bundle_at; i++) {
|
|
sctp_pegs[SCTP_RETRANTSN_SENT]++;
|
|
data_list[i]->sent = SCTP_DATAGRAM_SENT;
|
|
data_list[i]->snd_count++;
|
|
sctp_ucount_decr(asoc->sent_queue_retran_cnt);
|
|
/* record the time */
|
|
data_list[i]->sent_rcv_time = asoc->time_last_sent;
|
|
net->flight_size += data_list[i]->book_size;
|
|
asoc->total_flight += data_list[i]->book_size;
|
|
asoc->total_flight_count++;
|
|
|
|
#ifdef SCTP_LOG_RWND
|
|
sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
|
|
asoc->peers_rwnd , data_list[i]->send_size, sctp_peer_chunk_oh);
|
|
#endif
|
|
asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
|
|
(u_int32_t)(data_list[i]->send_size + sctp_peer_chunk_oh));
|
|
if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
|
|
/* SWS sender side engages */
|
|
asoc->peers_rwnd = 0;
|
|
}
|
|
|
|
if ((i == 0) &&
|
|
(data_list[i]->rec.data.doing_fast_retransmit)) {
|
|
sctp_pegs[SCTP_FAST_RETRAN]++;
|
|
if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
|
|
(tmr_started == 0)) {
|
|
/*
|
|
* ok we just fast-retrans'd
|
|
* the lowest TSN, i.e the
|
|
* first on the list. In this
|
|
* case we want to give some
|
|
* more time to get a SACK
|
|
* back without a t3-expiring.
|
|
*/
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
|
|
}
|
|
}
|
|
}
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_auditing(21, inp, stcb, NULL);
|
|
#endif
|
|
} else {
|
|
/* None will fit */
|
|
return (1);
|
|
}
|
|
if (asoc->sent_queue_retran_cnt <= 0) {
|
|
/* all done we have no more to retran */
|
|
asoc->sent_queue_retran_cnt = 0;
|
|
break;
|
|
}
|
|
if (one_chunk) {
|
|
/* No more room in rwnd */
|
|
return (1);
|
|
}
|
|
/* stop the for loop here. we sent out a packet */
|
|
break;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
|
|
static int
|
|
sctp_timer_validation(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb,
|
|
struct sctp_association *asoc,
|
|
int ret)
|
|
{
|
|
struct sctp_nets *net;
|
|
/* Validate that a timer is running somewhere */
|
|
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
|
|
if (callout_pending(&net->rxt_timer.timer)) {
|
|
/* Here is a timer */
|
|
return (ret);
|
|
}
|
|
}
|
|
/* Gak, we did not have a timer somewhere */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("Deadlock avoided starting timer on a dest at retran\n");
|
|
}
|
|
#endif
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
|
|
return (ret);
|
|
}
|
|
|
|
int
|
|
sctp_chunk_output(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb,
|
|
int from_where)
|
|
{
|
|
/* Ok this is the generic chunk service queue.
|
|
* we must do the following:
|
|
* - See if there are retransmits pending, if so we
|
|
* must do these first and return.
|
|
* - Service the stream queue that is next,
|
|
* moving any message (note I must get a complete
|
|
* message i.e. FIRST/MIDDLE and LAST to the out
|
|
* queue in one pass) and assigning TSN's
|
|
* - Check to see if the cwnd/rwnd allows any output, if
|
|
* so we go ahead and fomulate and send the low level
|
|
* chunks. Making sure to combine any control in the
|
|
* control chunk queue also.
|
|
*/
|
|
struct sctp_association *asoc;
|
|
struct sctp_nets *net;
|
|
int error, num_out, tot_out, ret, reason_code, burst_cnt, burst_limit;
|
|
struct timeval now;
|
|
int now_filled=0;
|
|
int cwnd_full=0;
|
|
asoc = &stcb->asoc;
|
|
tot_out = 0;
|
|
num_out = 0;
|
|
reason_code = 0;
|
|
sctp_pegs[SCTP_CALLS_TO_CO]++;
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("in co - retran count:%d\n", asoc->sent_queue_retran_cnt);
|
|
}
|
|
#endif
|
|
while (asoc->sent_queue_retran_cnt) {
|
|
/* Ok, it is retransmission time only, we send out only ONE
|
|
* packet with a single call off to the retran code.
|
|
*/
|
|
ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled);
|
|
if (ret > 0) {
|
|
/* Can't send anymore */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("retransmission ret:%d -- full\n", ret);
|
|
}
|
|
#endif
|
|
/*
|
|
* now lets push out control by calling med-level
|
|
* output once. this assures that we WILL send HB's
|
|
* if queued too.
|
|
*/
|
|
(void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
|
|
&cwnd_full, from_where,
|
|
&now, &now_filled);
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Control send outputs:%d@full\n", num_out);
|
|
}
|
|
#endif
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_auditing(8, inp, stcb, NULL);
|
|
#endif
|
|
return (sctp_timer_validation(inp, stcb, asoc, ret));
|
|
}
|
|
if (ret < 0) {
|
|
/*
|
|
* The count was off.. retran is not happening so do
|
|
* the normal retransmission.
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Done with retrans, none left fill up window\n");
|
|
}
|
|
#endif
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_auditing(9, inp, stcb, NULL);
|
|
#endif
|
|
break;
|
|
}
|
|
if (from_where == 1) {
|
|
/* Only one transmission allowed out of a timeout */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Only one packet allowed out\n");
|
|
}
|
|
#endif
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_auditing(10, inp, stcb, NULL);
|
|
#endif
|
|
/* Push out any control */
|
|
(void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, &cwnd_full, from_where,
|
|
&now, &now_filled);
|
|
return (ret);
|
|
}
|
|
if ((num_out == 0) && (ret == 0)) {
|
|
/* No more retrans to send */
|
|
break;
|
|
}
|
|
}
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_auditing(12, inp, stcb, NULL);
|
|
#endif
|
|
/* Check for bad destinations, if they exist move chunks around. */
|
|
burst_limit = asoc->max_burst;
|
|
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
|
|
if ((net->dest_state & SCTP_ADDR_NOT_REACHABLE) ==
|
|
SCTP_ADDR_NOT_REACHABLE) {
|
|
/*
|
|
* if possible move things off of this address
|
|
* we still may send below due to the dormant state
|
|
* but we try to find an alternate address to send
|
|
* to and if we have one we move all queued data on
|
|
* the out wheel to this alternate address.
|
|
*/
|
|
sctp_move_to_an_alt(stcb, asoc, net);
|
|
} else {
|
|
/*
|
|
if ((asoc->sat_network) || (net->addr_is_local)) {
|
|
burst_limit = asoc->max_burst * SCTP_SAT_NETWORK_BURST_INCR;
|
|
}
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("examined net:%p burst limit:%d\n", net, asoc->max_burst);
|
|
}
|
|
#endif
|
|
|
|
#ifdef SCTP_USE_ALLMAN_BURST
|
|
if ((net->flight_size+(burst_limit*net->mtu)) < net->cwnd) {
|
|
if (net->ssthresh < net->cwnd)
|
|
net->ssthresh = net->cwnd;
|
|
net->cwnd = (net->flight_size+(burst_limit*net->mtu));
|
|
#ifdef SCTP_LOG_MAXBURST
|
|
sctp_log_maxburst(net, 0, burst_limit, SCTP_MAX_BURST_APPLIED);
|
|
#endif
|
|
sctp_pegs[SCTP_MAX_BURST_APL]++;
|
|
}
|
|
net->fast_retran_ip = 0;
|
|
#endif
|
|
}
|
|
|
|
}
|
|
/* Fill up what we can to the destination */
|
|
burst_cnt = 0;
|
|
cwnd_full = 0;
|
|
do {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("Burst count:%d - call m-c-o\n", burst_cnt);
|
|
}
|
|
#endif
|
|
error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
|
|
&reason_code, 0, &cwnd_full, from_where,
|
|
&now, &now_filled);
|
|
if (error) {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Error %d was returned from med-c-op\n", error);
|
|
}
|
|
#endif
|
|
#ifdef SCTP_LOG_MAXBURST
|
|
sctp_log_maxburst(asoc->primary_destination, error , burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
|
|
#endif
|
|
break;
|
|
}
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) {
|
|
printf("m-c-o put out %d\n", num_out);
|
|
}
|
|
#endif
|
|
tot_out += num_out;
|
|
burst_cnt++;
|
|
} while (num_out
|
|
#ifndef SCTP_USE_ALLMAN_BURST
|
|
&& (burst_cnt < burst_limit)
|
|
#endif
|
|
);
|
|
#ifndef SCTP_USE_ALLMAN_BURST
|
|
if (burst_cnt >= burst_limit) {
|
|
sctp_pegs[SCTP_MAX_BURST_APL]++;
|
|
asoc->burst_limit_applied = 1;
|
|
#ifdef SCTP_LOG_MAXBURST
|
|
sctp_log_maxburst(asoc->primary_destination, 0 , burst_cnt, SCTP_MAX_BURST_APPLIED);
|
|
#endif
|
|
} else {
|
|
asoc->burst_limit_applied = 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Ok, we have put out %d chunks\n", tot_out);
|
|
}
|
|
#endif
|
|
if (tot_out == 0) {
|
|
sctp_pegs[SCTP_CO_NODATASNT]++;
|
|
if (asoc->stream_queue_cnt > 0) {
|
|
sctp_pegs[SCTP_SOS_NOSNT]++;
|
|
} else {
|
|
sctp_pegs[SCTP_NOS_NOSNT]++;
|
|
}
|
|
if (asoc->send_queue_cnt > 0) {
|
|
sctp_pegs[SCTP_SOSE_NOSNT]++;
|
|
} else {
|
|
sctp_pegs[SCTP_NOSE_NOSNT]++;
|
|
}
|
|
}
|
|
/* Now we need to clean up the control chunk chain if
|
|
* a ECNE is on it. It must be marked as UNSENT again
|
|
* so next call will continue to send it until
|
|
* such time that we get a CWR, to remove it.
|
|
*/
|
|
sctp_fix_ecn_echo(asoc);
|
|
return (error);
|
|
}
|
|
|
|
|
|
int
|
|
sctp_output(struct sctp_inpcb *inp, struct mbuf *m,
|
|
struct sockaddr *addr, struct mbuf *control, struct lwp *l, int flags)
|
|
{
|
|
struct sctp_inpcb *t_inp;
|
|
struct sctp_tcb *stcb;
|
|
struct sctp_nets *net;
|
|
struct sctp_association *asoc;
|
|
int create_lock_applied = 0;
|
|
int queue_only, error = 0;
|
|
struct sctp_sndrcvinfo srcv;
|
|
int un_sent = 0;
|
|
int use_rcvinfo = 0;
|
|
t_inp = inp;
|
|
/* struct route ro;*/
|
|
|
|
queue_only = 0;
|
|
stcb = NULL;
|
|
asoc = NULL;
|
|
net = NULL;
|
|
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("USR Send BEGINS\n");
|
|
}
|
|
#endif
|
|
|
|
if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
|
|
(inp->sctp_flags & SCTP_PCB_FLAGS_ACCEPTING)) {
|
|
/* The listner can NOT send */
|
|
if (control) {
|
|
sctppcbinfo.mbuf_track--;
|
|
sctp_m_freem(control);
|
|
control = NULL;
|
|
}
|
|
sctp_m_freem(m);
|
|
return (EFAULT);
|
|
}
|
|
/* Can't allow a V6 address on a non-v6 socket */
|
|
if (addr) {
|
|
SCTP_ASOC_CREATE_LOCK(inp);
|
|
if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
|
|
(inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
|
|
/* Should I really unlock ? */
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
if (control) {
|
|
sctppcbinfo.mbuf_track--;
|
|
sctp_m_freem(control);
|
|
control = NULL;
|
|
}
|
|
sctp_m_freem(m);
|
|
return (EFAULT);
|
|
}
|
|
create_lock_applied = 1;
|
|
if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
|
|
(addr->sa_family == AF_INET6)) {
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
if (control) {
|
|
sctppcbinfo.mbuf_track--;
|
|
sctp_m_freem(control);
|
|
control = NULL;
|
|
}
|
|
sctp_m_freem(m);
|
|
return (EINVAL);
|
|
}
|
|
}
|
|
if (control) {
|
|
sctppcbinfo.mbuf_track++;
|
|
if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&srcv, control,
|
|
sizeof(srcv))) {
|
|
if (srcv.sinfo_flags & SCTP_SENDALL) {
|
|
/* its a sendall */
|
|
sctppcbinfo.mbuf_track--;
|
|
sctp_m_freem(control);
|
|
if (create_lock_applied) {
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
create_lock_applied = 0;
|
|
}
|
|
return (sctp_sendall(inp, NULL, m, &srcv));
|
|
}
|
|
if (srcv.sinfo_assoc_id) {
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
|
|
SCTP_INP_RLOCK(inp);
|
|
stcb = LIST_FIRST(&inp->sctp_asoc_list);
|
|
if (stcb) {
|
|
SCTP_TCB_LOCK(stcb);
|
|
}
|
|
SCTP_INP_RUNLOCK(inp);
|
|
|
|
if (stcb == NULL) {
|
|
if (create_lock_applied) {
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
create_lock_applied = 0;
|
|
}
|
|
sctppcbinfo.mbuf_track--;
|
|
sctp_m_freem(control);
|
|
sctp_m_freem(m);
|
|
return (ENOTCONN);
|
|
}
|
|
net = stcb->asoc.primary_destination;
|
|
} else {
|
|
stcb = sctp_findassociation_ep_asocid(inp, srcv.sinfo_assoc_id);
|
|
}
|
|
/*
|
|
* Question: Should I error here if the
|
|
|
|
* assoc_id is no longer valid?
|
|
* i.e. I can't find it?
|
|
*/
|
|
if ((stcb) &&
|
|
(addr != NULL)) {
|
|
/* Must locate the net structure */
|
|
if (addr)
|
|
net = sctp_findnet(stcb, addr);
|
|
}
|
|
if (net == NULL)
|
|
net = stcb->asoc.primary_destination;
|
|
}
|
|
use_rcvinfo = 1;
|
|
}
|
|
}
|
|
if (stcb == NULL) {
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
|
|
SCTP_INP_RLOCK(inp);
|
|
stcb = LIST_FIRST(&inp->sctp_asoc_list);
|
|
if (stcb) {
|
|
SCTP_TCB_LOCK(stcb);
|
|
}
|
|
SCTP_INP_RUNLOCK(inp);
|
|
if (stcb == NULL) {
|
|
if (create_lock_applied) {
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
create_lock_applied = 0;
|
|
}
|
|
if (control) {
|
|
sctppcbinfo.mbuf_track--;
|
|
sctp_m_freem(control);
|
|
control = NULL;
|
|
}
|
|
sctp_m_freem(m);
|
|
return (ENOTCONN);
|
|
}
|
|
if (addr == NULL) {
|
|
net = stcb->asoc.primary_destination;
|
|
} else {
|
|
net = sctp_findnet(stcb, addr);
|
|
if (net == NULL) {
|
|
net = stcb->asoc.primary_destination;
|
|
}
|
|
}
|
|
} else {
|
|
if (addr != NULL) {
|
|
SCTP_INP_WLOCK(inp);
|
|
SCTP_INP_INCR_REF(inp);
|
|
SCTP_INP_WUNLOCK(inp);
|
|
stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
|
|
if (stcb == NULL) {
|
|
SCTP_INP_WLOCK(inp);
|
|
SCTP_INP_DECR_REF(inp);
|
|
SCTP_INP_WUNLOCK(inp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if ((stcb == NULL) &&
|
|
(inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
|
|
if (control) {
|
|
sctppcbinfo.mbuf_track--;
|
|
sctp_m_freem(control);
|
|
control = NULL;
|
|
}
|
|
if (create_lock_applied) {
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
create_lock_applied = 0;
|
|
}
|
|
sctp_m_freem(m);
|
|
return (ENOTCONN);
|
|
} else if ((stcb == NULL) &&
|
|
(addr == NULL)) {
|
|
if (control) {
|
|
sctppcbinfo.mbuf_track--;
|
|
sctp_m_freem(control);
|
|
control = NULL;
|
|
}
|
|
if (create_lock_applied) {
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
create_lock_applied = 0;
|
|
}
|
|
sctp_m_freem(m);
|
|
return (ENOENT);
|
|
} else if (stcb == NULL) {
|
|
/* UDP mode, we must go ahead and start the INIT process */
|
|
if ((use_rcvinfo) && (srcv.sinfo_flags & SCTP_ABORT)) {
|
|
/* Strange user to do this */
|
|
if (control) {
|
|
sctppcbinfo.mbuf_track--;
|
|
sctp_m_freem(control);
|
|
control = NULL;
|
|
}
|
|
if (create_lock_applied) {
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
create_lock_applied = 0;
|
|
}
|
|
sctp_m_freem(m);
|
|
return (ENOENT);
|
|
}
|
|
stcb = sctp_aloc_assoc(inp, addr, 1, &error, 0);
|
|
if (stcb == NULL) {
|
|
if (control) {
|
|
sctppcbinfo.mbuf_track--;
|
|
sctp_m_freem(control);
|
|
control = NULL;
|
|
}
|
|
if (create_lock_applied) {
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
create_lock_applied = 0;
|
|
}
|
|
sctp_m_freem(m);
|
|
return (error);
|
|
}
|
|
if (create_lock_applied) {
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
create_lock_applied = 0;
|
|
} else {
|
|
printf("Huh-1, create lock should have been applied!\n");
|
|
}
|
|
queue_only = 1;
|
|
asoc = &stcb->asoc;
|
|
asoc->state = SCTP_STATE_COOKIE_WAIT;
|
|
SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
|
|
if (control) {
|
|
/* see if a init structure exists in cmsg headers */
|
|
struct sctp_initmsg initm;
|
|
int i;
|
|
if (sctp_find_cmsg(SCTP_INIT, (void *)&initm, control,
|
|
sizeof(initm))) {
|
|
/* we have an INIT override of the default */
|
|
if (initm.sinit_max_attempts)
|
|
asoc->max_init_times = initm.sinit_max_attempts;
|
|
if (initm.sinit_num_ostreams)
|
|
asoc->pre_open_streams = initm.sinit_num_ostreams;
|
|
if (initm.sinit_max_instreams)
|
|
asoc->max_inbound_streams = initm.sinit_max_instreams;
|
|
if (initm.sinit_max_init_timeo)
|
|
asoc->initial_init_rto_max = initm.sinit_max_init_timeo;
|
|
}
|
|
if (asoc->streamoutcnt < asoc->pre_open_streams) {
|
|
/* Default is NOT correct */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Ok, defout:%d pre_open:%d\n",
|
|
asoc->streamoutcnt, asoc->pre_open_streams);
|
|
}
|
|
#endif
|
|
free(asoc->strmout, M_PCB);
|
|
asoc->strmout = NULL;
|
|
asoc->streamoutcnt = asoc->pre_open_streams;
|
|
asoc->strmout = malloc(asoc->streamoutcnt *
|
|
sizeof(struct sctp_stream_out), M_PCB,
|
|
M_WAIT);
|
|
for (i = 0; i < asoc->streamoutcnt; i++) {
|
|
/*
|
|
* inbound side must be set to 0xffff,
|
|
* also NOTE when we get the INIT-ACK
|
|
* back (for INIT sender) we MUST
|
|
* reduce the count (streamoutcnt) but
|
|
* first check if we sent to any of the
|
|
* upper streams that were dropped (if
|
|
* some were). Those that were dropped
|
|
* must be notified to the upper layer
|
|
* as failed to send.
|
|
*/
|
|
asoc->strmout[i].next_sequence_sent = 0x0;
|
|
TAILQ_INIT(&asoc->strmout[i].outqueue);
|
|
asoc->strmout[i].stream_no = i;
|
|
asoc->strmout[i].next_spoke.tqe_next = 0;
|
|
asoc->strmout[i].next_spoke.tqe_prev = 0;
|
|
}
|
|
}
|
|
}
|
|
sctp_send_initiate(inp, stcb);
|
|
/*
|
|
* we may want to dig in after this call and adjust the MTU
|
|
* value. It defaulted to 1500 (constant) but the ro structure
|
|
* may now have an update and thus we may need to change it
|
|
* BEFORE we append the message.
|
|
*/
|
|
net = stcb->asoc.primary_destination;
|
|
} else {
|
|
if (create_lock_applied) {
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
create_lock_applied = 0;
|
|
}
|
|
asoc = &stcb->asoc;
|
|
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
|
|
queue_only = 1;
|
|
}
|
|
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
|
|
(asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
|
|
if (control) {
|
|
sctppcbinfo.mbuf_track--;
|
|
sctp_m_freem(control);
|
|
control = NULL;
|
|
}
|
|
if ((use_rcvinfo) &&
|
|
(srcv.sinfo_flags & SCTP_ABORT)) {
|
|
sctp_msg_append(stcb, net, m, &srcv, flags);
|
|
error = 0;
|
|
} else {
|
|
if (m)
|
|
sctp_m_freem(m);
|
|
error = ECONNRESET;
|
|
}
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
return (error);
|
|
}
|
|
}
|
|
if (create_lock_applied) {
|
|
/* we should never hit here with the create lock applied
|
|
*
|
|
*/
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
create_lock_applied = 0;
|
|
}
|
|
|
|
|
|
if (use_rcvinfo == 0) {
|
|
srcv = stcb->asoc.def_send;
|
|
}
|
|
#ifdef SCTP_DEBUG
|
|
else {
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT5) {
|
|
printf("stream:%d\n", srcv.sinfo_stream);
|
|
printf("flags:%x\n", (u_int)srcv.sinfo_flags);
|
|
printf("ppid:%d\n", srcv.sinfo_ppid);
|
|
printf("context:%d\n", srcv.sinfo_context);
|
|
}
|
|
}
|
|
#endif
|
|
if (control) {
|
|
sctppcbinfo.mbuf_track--;
|
|
sctp_m_freem(control);
|
|
control = NULL;
|
|
}
|
|
if (net && ((srcv.sinfo_flags & SCTP_ADDR_OVER))) {
|
|
/* we take the override or the unconfirmed */
|
|
;
|
|
} else {
|
|
net = stcb->asoc.primary_destination;
|
|
}
|
|
if ((error = sctp_msg_append(stcb, net, m, &srcv, flags))) {
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
return (error);
|
|
}
|
|
if (net->flight_size > net->cwnd) {
|
|
sctp_pegs[SCTP_SENDTO_FULL_CWND]++;
|
|
queue_only = 1;
|
|
} else if (asoc->ifp_had_enobuf) {
|
|
sctp_pegs[SCTP_QUEONLY_BURSTLMT]++;
|
|
queue_only = 1;
|
|
} else {
|
|
un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
|
|
((stcb->asoc.chunks_on_out_queue - stcb->asoc.total_flight_count) * sizeof(struct sctp_data_chunk)) +
|
|
SCTP_MED_OVERHEAD);
|
|
|
|
if (((inp->sctp_flags & SCTP_PCB_FLAGS_NODELAY) == 0) &&
|
|
(stcb->asoc.total_flight > 0) &&
|
|
(un_sent < (int)stcb->asoc.smallest_mtu)
|
|
) {
|
|
|
|
/* Ok, Nagle is set on and we have
|
|
* data outstanding. Don't send anything
|
|
* and let the SACK drive out the data.
|
|
*/
|
|
sctp_pegs[SCTP_NAGLE_NOQ]++;
|
|
queue_only = 1;
|
|
} else {
|
|
sctp_pegs[SCTP_NAGLE_OFF]++;
|
|
}
|
|
}
|
|
if ((queue_only == 0) && stcb->asoc.peers_rwnd) {
|
|
/* we can attempt to send too.*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("USR Send calls sctp_chunk_output\n");
|
|
}
|
|
#endif
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_audit_log(0xC0, 1);
|
|
sctp_auditing(6, inp, stcb, net);
|
|
#endif
|
|
sctp_pegs[SCTP_OUTPUT_FRM_SND]++;
|
|
sctp_chunk_output(inp, stcb, 0);
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_audit_log(0xC0, 2);
|
|
sctp_auditing(7, inp, stcb, net);
|
|
#endif
|
|
|
|
}
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("USR Send complete qo:%d prw:%d\n", queue_only, stcb->asoc.peers_rwnd);
|
|
}
|
|
#endif
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
send_forward_tsn(struct sctp_tcb *stcb,
|
|
struct sctp_association *asoc)
|
|
{
|
|
struct sctp_tmit_chunk *chk;
|
|
struct sctp_forward_tsn_chunk *fwdtsn;
|
|
|
|
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
|
|
if (chk->rec.chunk_id == SCTP_FORWARD_CUM_TSN) {
|
|
/* mark it to unsent */
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
/* Do we correct its output location? */
|
|
if (chk->whoTo != asoc->primary_destination) {
|
|
sctp_free_remote_addr(chk->whoTo);
|
|
chk->whoTo = asoc->primary_destination;
|
|
chk->whoTo->ref_count++;
|
|
}
|
|
goto sctp_fill_in_rest;
|
|
}
|
|
}
|
|
/* Ok if we reach here we must build one */
|
|
chk = (struct sctp_tmit_chunk *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_chunk);
|
|
if (chk == NULL) {
|
|
return;
|
|
}
|
|
sctppcbinfo.ipi_count_chunk++;
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
chk->rec.chunk_id = SCTP_FORWARD_CUM_TSN;
|
|
chk->asoc = asoc;
|
|
MGETHDR(chk->data, M_DONTWAIT, MT_DATA);
|
|
if (chk->data == NULL) {
|
|
chk->whoTo->ref_count--;
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
|
|
sctppcbinfo.ipi_count_chunk--;
|
|
if ((int)sctppcbinfo.ipi_count_chunk < 0) {
|
|
panic("Chunk count is negative");
|
|
}
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
return;
|
|
}
|
|
chk->data->m_data += SCTP_MIN_OVERHEAD;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->whoTo = asoc->primary_destination;
|
|
chk->whoTo->ref_count++;
|
|
TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
|
|
asoc->ctrl_queue_cnt++;
|
|
sctp_fill_in_rest:
|
|
/* Here we go through and fill out the part that
|
|
* deals with stream/seq of the ones we skip.
|
|
*/
|
|
chk->data->m_pkthdr.len = chk->data->m_len = 0;
|
|
{
|
|
struct sctp_tmit_chunk *at, *tp1, *last;
|
|
struct sctp_strseq *strseq;
|
|
unsigned int cnt_of_space, i, ovh;
|
|
unsigned int space_needed;
|
|
unsigned int cnt_of_skipped = 0;
|
|
TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
|
|
if (at->sent != SCTP_FORWARD_TSN_SKIP) {
|
|
/* no more to look at */
|
|
break;
|
|
}
|
|
if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
|
|
/* We don't report these */
|
|
continue;
|
|
}
|
|
cnt_of_skipped++;
|
|
}
|
|
space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
|
|
(cnt_of_skipped * sizeof(struct sctp_strseq)));
|
|
if ((M_TRAILINGSPACE(chk->data) < (int)space_needed) &&
|
|
((chk->data->m_flags & M_EXT) == 0)) {
|
|
/* Need a M_EXT, get one and move
|
|
* fwdtsn to data area.
|
|
*/
|
|
MCLGET(chk->data, M_DONTWAIT);
|
|
}
|
|
cnt_of_space = M_TRAILINGSPACE(chk->data);
|
|
|
|
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
|
|
ovh = SCTP_MIN_OVERHEAD;
|
|
} else {
|
|
ovh = SCTP_MIN_V4_OVERHEAD;
|
|
}
|
|
if (cnt_of_space > (asoc->smallest_mtu-ovh)) {
|
|
/* trim to a mtu size */
|
|
cnt_of_space = asoc->smallest_mtu - ovh;
|
|
}
|
|
if (cnt_of_space < space_needed) {
|
|
/* ok we must trim down the chunk by lowering
|
|
* the advance peer ack point.
|
|
*/
|
|
cnt_of_skipped = (cnt_of_space-
|
|
((sizeof(struct sctp_forward_tsn_chunk))/
|
|
sizeof(struct sctp_strseq)));
|
|
/* Go through and find the TSN that
|
|
* will be the one we report.
|
|
*/
|
|
at = TAILQ_FIRST(&asoc->sent_queue);
|
|
for (i = 0; i < cnt_of_skipped; i++) {
|
|
tp1 = TAILQ_NEXT(at, sctp_next);
|
|
at = tp1;
|
|
}
|
|
last = at;
|
|
/* last now points to last one I can report, update peer ack point */
|
|
asoc->advanced_peer_ack_point = last->rec.data.TSN_seq;
|
|
space_needed -= (cnt_of_skipped * sizeof(struct sctp_strseq));
|
|
}
|
|
chk->send_size = space_needed;
|
|
/* Setup the chunk */
|
|
fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
|
|
fwdtsn->ch.chunk_length = htons(chk->send_size);
|
|
fwdtsn->ch.chunk_flags = 0;
|
|
fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
|
|
fwdtsn->new_cumulative_tsn = htonl(asoc->advanced_peer_ack_point);
|
|
chk->send_size = (sizeof(struct sctp_forward_tsn_chunk) +
|
|
(cnt_of_skipped * sizeof(struct sctp_strseq)));
|
|
chk->data->m_pkthdr.len = chk->data->m_len = chk->send_size;
|
|
fwdtsn++;
|
|
/* Move pointer to after the fwdtsn and transfer to
|
|
* the strseq pointer.
|
|
*/
|
|
strseq = (struct sctp_strseq *)fwdtsn;
|
|
/*
|
|
* Now populate the strseq list. This is done blindly
|
|
* without pulling out duplicate stream info. This is
|
|
* inefficent but won't harm the process since the peer
|
|
* will look at these in sequence and will thus release
|
|
* anything. It could mean we exceed the PMTU and chop
|
|
* off some that we could have included.. but this is
|
|
* unlikely (aka 1432/4 would mean 300+ stream seq's would
|
|
* have to be reported in one FWD-TSN. With a bit of work
|
|
* we can later FIX this to optimize and pull out duplcates..
|
|
* but it does add more overhead. So for now... not!
|
|
*/
|
|
at = TAILQ_FIRST(&asoc->sent_queue);
|
|
for (i = 0; i < cnt_of_skipped; i++) {
|
|
tp1 = TAILQ_NEXT(at, sctp_next);
|
|
if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
|
|
/* We don't report these */
|
|
i--;
|
|
at = tp1;
|
|
continue;
|
|
}
|
|
strseq->stream = ntohs(at->rec.data.stream_number);
|
|
strseq->sequence = ntohs(at->rec.data.stream_seq);
|
|
strseq++;
|
|
at = tp1;
|
|
}
|
|
}
|
|
return;
|
|
|
|
}
|
|
|
|
void
|
|
sctp_send_sack(struct sctp_tcb *stcb)
|
|
{
|
|
/*
|
|
* Queue up a SACK in the control queue. We must first check to
|
|
* see if a SACK is somehow on the control queue. If so, we will
|
|
* take and remove the old one.
|
|
*/
|
|
struct sctp_association *asoc;
|
|
struct sctp_tmit_chunk *chk, *a_chk;
|
|
struct sctp_sack_chunk *sack;
|
|
struct sctp_gap_ack_block *gap_descriptor;
|
|
uint32_t *dup;
|
|
int start;
|
|
unsigned int i, maxi, seeing_ones, m_size;
|
|
unsigned int num_gap_blocks, space;
|
|
|
|
start = maxi = 0;
|
|
seeing_ones = 1;
|
|
a_chk = NULL;
|
|
asoc = &stcb->asoc;
|
|
if (asoc->last_data_chunk_from == NULL) {
|
|
/* Hmm we never received anything */
|
|
return;
|
|
}
|
|
sctp_set_rwnd(stcb, asoc);
|
|
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
|
|
if (chk->rec.chunk_id == SCTP_SELECTIVE_ACK) {
|
|
/* Hmm, found a sack already on queue, remove it */
|
|
TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
|
|
asoc->ctrl_queue_cnt++;
|
|
a_chk = chk;
|
|
if (a_chk->data)
|
|
sctp_m_freem(a_chk->data);
|
|
a_chk->data = NULL;
|
|
sctp_free_remote_addr(a_chk->whoTo);
|
|
a_chk->whoTo = NULL;
|
|
break;
|
|
}
|
|
}
|
|
if (a_chk == NULL) {
|
|
a_chk = (struct sctp_tmit_chunk *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_chunk);
|
|
if (a_chk == NULL) {
|
|
/* No memory so we drop the idea, and set a timer */
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
|
|
stcb->sctp_ep, stcb, NULL);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_RECV,
|
|
stcb->sctp_ep, stcb, NULL);
|
|
return;
|
|
}
|
|
sctppcbinfo.ipi_count_chunk++;
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
a_chk->rec.chunk_id = SCTP_SELECTIVE_ACK;
|
|
}
|
|
a_chk->asoc = asoc;
|
|
a_chk->snd_count = 0;
|
|
a_chk->send_size = 0; /* fill in later */
|
|
a_chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
m_size = (asoc->mapping_array_size << 3);
|
|
|
|
if ((asoc->numduptsns) ||
|
|
(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_NOT_REACHABLE)
|
|
) {
|
|
/* Ok, we have some duplicates or the destination for the
|
|
* sack is unreachable, lets see if we can select an alternate
|
|
* than asoc->last_data_chunk_from
|
|
*/
|
|
if ((!(asoc->last_data_chunk_from->dest_state &
|
|
SCTP_ADDR_NOT_REACHABLE)) &&
|
|
(asoc->used_alt_onsack > 2)) {
|
|
/* We used an alt last time, don't this time */
|
|
a_chk->whoTo = NULL;
|
|
} else {
|
|
asoc->used_alt_onsack++;
|
|
a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from);
|
|
}
|
|
if (a_chk->whoTo == NULL) {
|
|
/* Nope, no alternate */
|
|
a_chk->whoTo = asoc->last_data_chunk_from;
|
|
asoc->used_alt_onsack = 0;
|
|
}
|
|
} else {
|
|
/* No duplicates so we use the last
|
|
* place we received data from.
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (asoc->last_data_chunk_from == NULL) {
|
|
printf("Huh, last_data_chunk_from is null when we want to sack??\n");
|
|
}
|
|
#endif
|
|
asoc->used_alt_onsack = 0;
|
|
a_chk->whoTo = asoc->last_data_chunk_from;
|
|
}
|
|
if (a_chk->whoTo)
|
|
a_chk->whoTo->ref_count++;
|
|
|
|
/* Ok now lets formulate a MBUF with our sack */
|
|
MGETHDR(a_chk->data, M_DONTWAIT, MT_DATA);
|
|
if ((a_chk->data == NULL) ||
|
|
(a_chk->whoTo == NULL)) {
|
|
/* rats, no mbuf memory */
|
|
if (a_chk->data) {
|
|
/* was a problem with the destination */
|
|
sctp_m_freem(a_chk->data);
|
|
a_chk->data = NULL;
|
|
}
|
|
a_chk->whoTo->ref_count--;
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, a_chk);
|
|
sctppcbinfo.ipi_count_chunk--;
|
|
if ((int)sctppcbinfo.ipi_count_chunk < 0) {
|
|
panic("Chunk count is negative");
|
|
}
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
|
|
stcb->sctp_ep, stcb, NULL);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_RECV,
|
|
stcb->sctp_ep, stcb, NULL);
|
|
return;
|
|
}
|
|
/* First count the number of gap ack blocks we need */
|
|
if (asoc->highest_tsn_inside_map == asoc->cumulative_tsn) {
|
|
/* We know if there are none above the cum-ack we
|
|
* have everything with NO gaps
|
|
*/
|
|
num_gap_blocks = 0;
|
|
} else {
|
|
/* Ok we must count how many gaps we
|
|
* have.
|
|
*/
|
|
num_gap_blocks = 0;
|
|
if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) {
|
|
maxi = (asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn);
|
|
} else {
|
|
maxi = (asoc->highest_tsn_inside_map + (MAX_TSN - asoc->mapping_array_base_tsn) + 1);
|
|
}
|
|
if (maxi > m_size) {
|
|
/* impossible but who knows, someone is playing with us :> */
|
|
#ifdef SCTP_DEBUG
|
|
printf("GAK maxi:%d > m_size:%d came out higher than allowed htsn:%u base:%u cumack:%u\n",
|
|
maxi,
|
|
m_size,
|
|
asoc->highest_tsn_inside_map,
|
|
asoc->mapping_array_base_tsn,
|
|
asoc->cumulative_tsn
|
|
);
|
|
#endif
|
|
num_gap_blocks = 0;
|
|
goto no_gaps_now;
|
|
}
|
|
if (asoc->cumulative_tsn >= asoc->mapping_array_base_tsn) {
|
|
start = (asoc->cumulative_tsn - asoc->mapping_array_base_tsn);
|
|
} else {
|
|
/* Set it so we start at 0 */
|
|
start = -1;
|
|
}
|
|
/* Ok move start up one to look at the NEXT past the cum-ack */
|
|
start++;
|
|
for (i = start; i <= maxi; i++) {
|
|
if (seeing_ones) {
|
|
/* while seeing ones I must
|
|
* transition back to 0 before
|
|
* finding the next gap and
|
|
* counting the segment.
|
|
*/
|
|
if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, i) == 0) {
|
|
seeing_ones = 0;
|
|
}
|
|
} else {
|
|
if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, i)) {
|
|
seeing_ones = 1;
|
|
num_gap_blocks++;
|
|
}
|
|
}
|
|
}
|
|
no_gaps_now:
|
|
if (num_gap_blocks == 0) {
|
|
/*
|
|
* Traveled all of the bits and NO one,
|
|
* must have reneged
|
|
*/
|
|
if (compare_with_wrap(asoc->cumulative_tsn, asoc->highest_tsn_inside_map, MAX_TSN)) {
|
|
asoc->highest_tsn_inside_map = asoc->cumulative_tsn;
|
|
#ifdef SCTP_MAP_LOGGING
|
|
sctp_log_map(0, 4, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Now calculate the space needed */
|
|
space = (sizeof(struct sctp_sack_chunk) +
|
|
(num_gap_blocks * sizeof(struct sctp_gap_ack_block)) +
|
|
(asoc->numduptsns * sizeof(int32_t))
|
|
);
|
|
if (space > (asoc->smallest_mtu-SCTP_MAX_OVERHEAD)) {
|
|
/* Reduce the size of the sack to fit */
|
|
int calc, fit;
|
|
calc = (asoc->smallest_mtu - SCTP_MAX_OVERHEAD);
|
|
calc -= sizeof(struct sctp_gap_ack_block);
|
|
fit = calc/sizeof(struct sctp_gap_ack_block);
|
|
if (fit > (int)num_gap_blocks) {
|
|
/* discard some dups */
|
|
asoc->numduptsns = (fit - num_gap_blocks);
|
|
} else {
|
|
/* discard all dups and some gaps */
|
|
num_gap_blocks = fit;
|
|
asoc->numduptsns = 0;
|
|
}
|
|
/* recalc space */
|
|
space = (sizeof(struct sctp_sack_chunk) +
|
|
(num_gap_blocks * sizeof(struct sctp_gap_ack_block)) +
|
|
(asoc->numduptsns * sizeof(int32_t))
|
|
);
|
|
|
|
}
|
|
|
|
if ((space+SCTP_MIN_OVERHEAD) > MHLEN) {
|
|
/* We need a cluster */
|
|
MCLGET(a_chk->data, M_DONTWAIT);
|
|
if ((a_chk->data->m_flags & M_EXT) != M_EXT) {
|
|
/* can't get a cluster
|
|
* give up and try later.
|
|
*/
|
|
if (a_chk->data)
|
|
sctp_m_freem(a_chk->data);
|
|
a_chk->data = NULL;
|
|
a_chk->whoTo->ref_count--;
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, a_chk);
|
|
sctppcbinfo.ipi_count_chunk--;
|
|
if ((int)sctppcbinfo.ipi_count_chunk < 0) {
|
|
panic("Chunk count is negative");
|
|
}
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
|
|
stcb->sctp_ep, stcb, NULL);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_RECV,
|
|
stcb->sctp_ep, stcb, NULL);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* ok, lets go through and fill it in */
|
|
a_chk->data->m_data += SCTP_MIN_OVERHEAD;
|
|
sack = mtod(a_chk->data, struct sctp_sack_chunk *);
|
|
sack->ch.chunk_type = SCTP_SELECTIVE_ACK;
|
|
sack->ch.chunk_flags = asoc->receiver_nonce_sum & SCTP_SACK_NONCE_SUM;
|
|
sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
|
|
sack->sack.a_rwnd = htonl(asoc->my_rwnd);
|
|
asoc->my_last_reported_rwnd = asoc->my_rwnd;
|
|
sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
|
|
sack->sack.num_dup_tsns = htons(asoc->numduptsns);
|
|
|
|
a_chk->send_size = (sizeof(struct sctp_sack_chunk) +
|
|
(num_gap_blocks * sizeof(struct sctp_gap_ack_block)) +
|
|
(asoc->numduptsns * sizeof(int32_t)));
|
|
a_chk->data->m_pkthdr.len = a_chk->data->m_len = a_chk->send_size;
|
|
sack->ch.chunk_length = htons(a_chk->send_size);
|
|
|
|
gap_descriptor = (struct sctp_gap_ack_block *)((vaddr_t)sack + sizeof(struct sctp_sack_chunk));
|
|
seeing_ones = 0;
|
|
for (i = start; i <= maxi; i++) {
|
|
if (num_gap_blocks == 0) {
|
|
break;
|
|
}
|
|
if (seeing_ones) {
|
|
/* while seeing Ones I must
|
|
* transition back to 0 before
|
|
* finding the next gap
|
|
*/
|
|
if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, i) == 0) {
|
|
gap_descriptor->end = htons(((uint16_t)(i-start)));
|
|
gap_descriptor++;
|
|
seeing_ones = 0;
|
|
num_gap_blocks--;
|
|
}
|
|
} else {
|
|
if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, i)) {
|
|
gap_descriptor->start = htons(((uint16_t)(i+1-start)));
|
|
/* advance struct to next pointer */
|
|
seeing_ones = 1;
|
|
}
|
|
}
|
|
}
|
|
if (num_gap_blocks) {
|
|
/* special case where the array is all 1's
|
|
* to the end of the array.
|
|
*/
|
|
gap_descriptor->end = htons(((uint16_t)((i-start))));
|
|
gap_descriptor++;
|
|
}
|
|
/* now we must add any dups we are going to report. */
|
|
if (asoc->numduptsns) {
|
|
dup = (uint32_t *)gap_descriptor;
|
|
for (i = 0; i < asoc->numduptsns; i++) {
|
|
*dup = htonl(asoc->dup_tsns[i]);
|
|
dup++;
|
|
}
|
|
asoc->numduptsns = 0;
|
|
}
|
|
/* now that the chunk is prepared queue it to the control
|
|
* chunk queue.
|
|
*/
|
|
TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
|
|
asoc->ctrl_queue_cnt++;
|
|
sctp_pegs[SCTP_PEG_SACKS_SENT]++;
|
|
return;
|
|
}
|
|
|
|
void
|
|
sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr)
|
|
{
|
|
struct mbuf *m_abort;
|
|
struct sctp_abort_msg *abort_m;
|
|
int sz;
|
|
abort_m = NULL;
|
|
MGETHDR(m_abort, M_DONTWAIT, MT_HEADER);
|
|
if (m_abort == NULL) {
|
|
/* no mbuf's */
|
|
return;
|
|
}
|
|
m_abort->m_data += SCTP_MIN_OVERHEAD;
|
|
abort_m = mtod(m_abort, struct sctp_abort_msg *);
|
|
m_abort->m_len = sizeof(struct sctp_abort_msg);
|
|
m_abort->m_next = operr;
|
|
sz = 0;
|
|
if (operr) {
|
|
struct mbuf *n;
|
|
n = operr;
|
|
while (n) {
|
|
sz += n->m_len;
|
|
n = n->m_next;
|
|
}
|
|
}
|
|
abort_m->msg.ch.chunk_type = SCTP_ABORT_ASSOCIATION;
|
|
abort_m->msg.ch.chunk_flags = 0;
|
|
abort_m->msg.ch.chunk_length = htons(sizeof(struct sctp_abort_chunk) +
|
|
sz);
|
|
abort_m->sh.src_port = stcb->sctp_ep->sctp_lport;
|
|
abort_m->sh.dest_port = stcb->rport;
|
|
abort_m->sh.v_tag = htonl(stcb->asoc.peer_vtag);
|
|
abort_m->sh.checksum = 0;
|
|
m_abort->m_pkthdr.len = m_abort->m_len + sz;
|
|
m_reset_rcvif(m_abort);
|
|
sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb,
|
|
stcb->asoc.primary_destination,
|
|
rtcache_getdst(&stcb->asoc.primary_destination->ro),
|
|
m_abort, 1, 0, NULL, 0);
|
|
}
|
|
|
|
int
|
|
sctp_send_shutdown_complete(struct sctp_tcb *stcb,
|
|
struct sctp_nets *net)
|
|
|
|
{
|
|
/* formulate and SEND a SHUTDOWN-COMPLETE */
|
|
struct mbuf *m_shutdown_comp;
|
|
struct sctp_shutdown_complete_msg *comp_cp;
|
|
|
|
m_shutdown_comp = NULL;
|
|
MGETHDR(m_shutdown_comp, M_DONTWAIT, MT_HEADER);
|
|
if (m_shutdown_comp == NULL) {
|
|
/* no mbuf's */
|
|
return (-1);
|
|
}
|
|
m_shutdown_comp->m_data += sizeof(struct ip6_hdr);
|
|
comp_cp = mtod(m_shutdown_comp, struct sctp_shutdown_complete_msg *);
|
|
comp_cp->shut_cmp.ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
|
|
comp_cp->shut_cmp.ch.chunk_flags = 0;
|
|
comp_cp->shut_cmp.ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
|
|
comp_cp->sh.src_port = stcb->sctp_ep->sctp_lport;
|
|
comp_cp->sh.dest_port = stcb->rport;
|
|
comp_cp->sh.v_tag = htonl(stcb->asoc.peer_vtag);
|
|
comp_cp->sh.checksum = 0;
|
|
|
|
m_shutdown_comp->m_pkthdr.len = m_shutdown_comp->m_len = sizeof(struct sctp_shutdown_complete_msg);
|
|
m_reset_rcvif(m_shutdown_comp);
|
|
sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
|
|
rtcache_getdst(&net->ro), m_shutdown_comp,
|
|
1, 0, NULL, 0);
|
|
if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
|
|
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
|
|
stcb->sctp_ep->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
|
|
stcb->sctp_ep->sctp_socket->so_snd.sb_cc = 0;
|
|
soisdisconnected(stcb->sctp_ep->sctp_socket);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
sctp_send_shutdown_complete2(struct mbuf *m, int iphlen, struct sctphdr *sh)
|
|
{
|
|
/* formulate and SEND a SHUTDOWN-COMPLETE */
|
|
struct mbuf *mout;
|
|
struct ip *iph, *iph_out;
|
|
struct ip6_hdr *ip6, *ip6_out;
|
|
int offset_out;
|
|
struct sctp_shutdown_complete_msg *comp_cp;
|
|
|
|
MGETHDR(mout, M_DONTWAIT, MT_HEADER);
|
|
if (mout == NULL) {
|
|
/* no mbuf's */
|
|
return (-1);
|
|
}
|
|
iph = mtod(m, struct ip *);
|
|
iph_out = NULL;
|
|
ip6_out = NULL;
|
|
offset_out = 0;
|
|
if (iph->ip_v == IPVERSION) {
|
|
mout->m_len = sizeof(struct ip) +
|
|
sizeof(struct sctp_shutdown_complete_msg);
|
|
mout->m_next = NULL;
|
|
iph_out = mtod(mout, struct ip *);
|
|
|
|
/* Fill in the IP header for the ABORT */
|
|
iph_out->ip_v = IPVERSION;
|
|
iph_out->ip_hl = (sizeof(struct ip)/4);
|
|
iph_out->ip_tos = (u_char)0;
|
|
iph_out->ip_id = 0;
|
|
iph_out->ip_off = 0;
|
|
iph_out->ip_ttl = MAXTTL;
|
|
iph_out->ip_p = IPPROTO_SCTP;
|
|
iph_out->ip_src.s_addr = iph->ip_dst.s_addr;
|
|
iph_out->ip_dst.s_addr = iph->ip_src.s_addr;
|
|
|
|
/* let IP layer calculate this */
|
|
iph_out->ip_sum = 0;
|
|
offset_out += sizeof(*iph_out);
|
|
comp_cp = (struct sctp_shutdown_complete_msg *)(
|
|
(vaddr_t)iph_out + offset_out);
|
|
} else if (iph->ip_v == (IPV6_VERSION >> 4)) {
|
|
ip6 = (struct ip6_hdr *)iph;
|
|
mout->m_len = sizeof(struct ip6_hdr) +
|
|
sizeof(struct sctp_shutdown_complete_msg);
|
|
mout->m_next = NULL;
|
|
ip6_out = mtod(mout, struct ip6_hdr *);
|
|
|
|
/* Fill in the IPv6 header for the ABORT */
|
|
ip6_out->ip6_flow = ip6->ip6_flow;
|
|
ip6_out->ip6_hlim = ip6_defhlim;
|
|
ip6_out->ip6_nxt = IPPROTO_SCTP;
|
|
ip6_out->ip6_src = ip6->ip6_dst;
|
|
ip6_out->ip6_dst = ip6->ip6_src;
|
|
ip6_out->ip6_plen = mout->m_len;
|
|
offset_out += sizeof(*ip6_out);
|
|
comp_cp = (struct sctp_shutdown_complete_msg *)(
|
|
(vaddr_t)ip6_out + offset_out);
|
|
} else {
|
|
/* Currently not supported. */
|
|
return (-1);
|
|
}
|
|
|
|
/* Now copy in and fill in the ABORT tags etc. */
|
|
comp_cp->sh.src_port = sh->dest_port;
|
|
comp_cp->sh.dest_port = sh->src_port;
|
|
comp_cp->sh.checksum = 0;
|
|
comp_cp->sh.v_tag = sh->v_tag;
|
|
comp_cp->shut_cmp.ch.chunk_flags = SCTP_HAD_NO_TCB;
|
|
comp_cp->shut_cmp.ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
|
|
comp_cp->shut_cmp.ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
|
|
|
|
mout->m_pkthdr.len = mout->m_len;
|
|
/* add checksum */
|
|
if ((sctp_no_csum_on_loopback) && m_get_rcvif_NOMPSAFE(m) != NULL &&
|
|
m_get_rcvif_NOMPSAFE(m)->if_type == IFT_LOOP) {
|
|
comp_cp->sh.checksum = 0;
|
|
} else {
|
|
comp_cp->sh.checksum = sctp_calculate_sum(mout, NULL, offset_out);
|
|
}
|
|
|
|
/* zap the rcvif, it should be null */
|
|
m_reset_rcvif(mout);
|
|
/* zap the stack pointer to the route */
|
|
if (iph_out != NULL) {
|
|
struct route ro;
|
|
|
|
memset(&ro, 0, sizeof ro);
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT2) {
|
|
printf("sctp_shutdown_complete2 calling ip_output:\n");
|
|
sctp_print_address_pkt(iph_out, &comp_cp->sh);
|
|
}
|
|
#endif
|
|
/* set IPv4 length */
|
|
iph_out->ip_len = htons(mout->m_pkthdr.len);
|
|
/* out it goes */
|
|
ip_output(mout, 0, &ro, IP_RAWOUTPUT, NULL, NULL);
|
|
} else if (ip6_out != NULL) {
|
|
struct route ro;
|
|
|
|
memset(&ro, 0, sizeof(ro));
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT2) {
|
|
printf("sctp_shutdown_complete2 calling ip6_output:\n");
|
|
sctp_print_address_pkt((struct ip *)ip6_out,
|
|
&comp_cp->sh);
|
|
}
|
|
#endif
|
|
ip6_output(mout, NULL, &ro, 0, NULL, NULL, NULL);
|
|
}
|
|
sctp_pegs[SCTP_DATAGRAMS_SENT]++;
|
|
return (0);
|
|
}
|
|
|
|
static struct sctp_nets *
|
|
sctp_select_hb_destination(struct sctp_tcb *stcb, struct timeval *now)
|
|
{
|
|
struct sctp_nets *net, *hnet;
|
|
int ms_goneby, highest_ms, state_overide=0;
|
|
|
|
SCTP_GETTIME_TIMEVAL(now);
|
|
highest_ms = 0;
|
|
hnet = NULL;
|
|
TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
|
|
if (
|
|
((net->dest_state & SCTP_ADDR_NOHB) && ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) ||
|
|
(net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)
|
|
) {
|
|
/* Skip this guy from consideration if HB is off AND its confirmed*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
|
|
printf("Skipping net:%p state:%d nohb/out-of-scope\n",
|
|
net, net->dest_state);
|
|
}
|
|
#endif
|
|
continue;
|
|
}
|
|
if (sctp_destination_is_reachable(stcb, (struct sockaddr *)&net->ro.ro_sa) == 0) {
|
|
/* skip this dest net from consideration */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
|
|
printf("Skipping net:%p reachable NOT\n",
|
|
net);
|
|
}
|
|
#endif
|
|
continue;
|
|
}
|
|
if (net->last_sent_time.tv_sec) {
|
|
/* Sent to so we subtract */
|
|
ms_goneby = (now->tv_sec - net->last_sent_time.tv_sec) * 1000;
|
|
} else
|
|
/* Never been sent to */
|
|
ms_goneby = 0x7fffffff;
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
|
|
printf("net:%p ms_goneby:%d\n",
|
|
net, ms_goneby);
|
|
}
|
|
#endif
|
|
/* When the address state is unconfirmed but still considered reachable, we
|
|
* HB at a higher rate. Once it goes confirmed OR reaches the "unreachable"
|
|
* state, thenw we cut it back to HB at a more normal pace.
|
|
*/
|
|
if ((net->dest_state & (SCTP_ADDR_UNCONFIRMED|SCTP_ADDR_NOT_REACHABLE)) == SCTP_ADDR_UNCONFIRMED) {
|
|
state_overide = 1;
|
|
} else {
|
|
state_overide = 0;
|
|
}
|
|
|
|
if ((((unsigned int)ms_goneby >= net->RTO) || (state_overide)) &&
|
|
(ms_goneby > highest_ms)) {
|
|
highest_ms = ms_goneby;
|
|
hnet = net;
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
|
|
printf("net:%p is the new high\n",
|
|
net);
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
if (hnet &&
|
|
((hnet->dest_state & (SCTP_ADDR_UNCONFIRMED|SCTP_ADDR_NOT_REACHABLE)) == SCTP_ADDR_UNCONFIRMED)) {
|
|
state_overide = 1;
|
|
} else {
|
|
state_overide = 0;
|
|
}
|
|
|
|
if (highest_ms && (((unsigned int)highest_ms >= hnet->RTO) || state_overide)) {
|
|
/* Found the one with longest delay bounds
|
|
* OR it is unconfirmed and still not marked
|
|
* unreachable.
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
|
|
printf("net:%p is the hb winner -",
|
|
hnet);
|
|
if (hnet)
|
|
sctp_print_address((struct sockaddr *)&hnet->ro.ro_sa);
|
|
else
|
|
printf(" none\n");
|
|
}
|
|
#endif
|
|
/* update the timer now */
|
|
hnet->last_sent_time = *now;
|
|
return (hnet);
|
|
}
|
|
/* Nothing to HB */
|
|
return (NULL);
|
|
}
|
|
|
|
int
|
|
sctp_send_hb(struct sctp_tcb *stcb, int user_req, struct sctp_nets *u_net)
|
|
{
|
|
struct sctp_tmit_chunk *chk;
|
|
struct sctp_nets *net;
|
|
struct sctp_heartbeat_chunk *hb;
|
|
struct timeval now;
|
|
struct sockaddr_in *sin;
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
if (user_req == 0) {
|
|
net = sctp_select_hb_destination(stcb, &now);
|
|
if (net == NULL) {
|
|
/* All our busy none to send to, just
|
|
* start the timer again.
|
|
*/
|
|
if (stcb->asoc.state == 0) {
|
|
return (0);
|
|
}
|
|
sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT,
|
|
stcb->sctp_ep,
|
|
stcb,
|
|
net);
|
|
return (0);
|
|
}
|
|
#ifndef SCTP_USE_ALLMAN_BURST
|
|
else {
|
|
/* found one idle.. decay cwnd on this one
|
|
* by 1/2 if none outstanding.
|
|
*/
|
|
|
|
if (net->flight_size == 0) {
|
|
net->cwnd /= 2;
|
|
if (net->addr_is_local) {
|
|
if (net->cwnd < (net->mtu *4)) {
|
|
net->cwnd = net->mtu * 4;
|
|
}
|
|
} else {
|
|
if (net->cwnd < (net->mtu * 2)) {
|
|
net->cwnd = net->mtu * 2;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
#endif
|
|
} else {
|
|
net = u_net;
|
|
if (net == NULL) {
|
|
return (0);
|
|
}
|
|
SCTP_GETTIME_TIMEVAL(&now);
|
|
}
|
|
sin = (struct sockaddr_in *)&net->ro.ro_sa;
|
|
if (sin->sin_family != AF_INET) {
|
|
if (sin->sin_family != AF_INET6) {
|
|
/* huh */
|
|
return (0);
|
|
}
|
|
}
|
|
chk = (struct sctp_tmit_chunk *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_chunk);
|
|
if (chk == NULL) {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
|
|
printf("Gak, can't get a chunk for hb\n");
|
|
}
|
|
#endif
|
|
return (0);
|
|
}
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
sctppcbinfo.ipi_count_chunk++;
|
|
chk->rec.chunk_id = SCTP_HEARTBEAT_REQUEST;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->send_size = sizeof(struct sctp_heartbeat_chunk);
|
|
MGETHDR(chk->data, M_DONTWAIT, MT_DATA);
|
|
if (chk->data == NULL) {
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
|
|
sctppcbinfo.ipi_count_chunk--;
|
|
if ((int)sctppcbinfo.ipi_count_chunk < 0) {
|
|
panic("Chunk count is negative");
|
|
}
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
return (0);
|
|
}
|
|
chk->data->m_data += SCTP_MIN_OVERHEAD;
|
|
chk->data->m_pkthdr.len = chk->data->m_len = chk->send_size;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->whoTo = net;
|
|
chk->whoTo->ref_count++;
|
|
/* Now we have a mbuf that we can fill in with the details */
|
|
hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
|
|
|
|
/* fill out chunk header */
|
|
hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
|
|
hb->ch.chunk_flags = 0;
|
|
hb->ch.chunk_length = htons(chk->send_size);
|
|
/* Fill out hb parameter */
|
|
hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
|
|
hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
|
|
hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
|
|
hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
|
|
/* Did our user request this one, put it in */
|
|
hb->heartbeat.hb_info.user_req = user_req;
|
|
hb->heartbeat.hb_info.addr_family = sin->sin_family;
|
|
hb->heartbeat.hb_info.addr_len = sin->sin_len;
|
|
if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
|
|
/* we only take from the entropy pool if the address is
|
|
* not confirmed.
|
|
*/
|
|
net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
|
|
net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
|
|
} else {
|
|
net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
|
|
net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
|
|
}
|
|
if (sin->sin_family == AF_INET) {
|
|
memcpy(hb->heartbeat.hb_info.address, &sin->sin_addr, sizeof(sin->sin_addr));
|
|
} else if (sin->sin_family == AF_INET6) {
|
|
/* We leave the scope the way it is in our lookup table. */
|
|
sin6 = (struct sockaddr_in6 *)&net->ro.ro_sa;
|
|
memcpy(hb->heartbeat.hb_info.address, &sin6->sin6_addr, sizeof(sin6->sin6_addr));
|
|
} else {
|
|
/* huh compiler bug */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Compiler bug bleeds a mbuf and a chunk\n");
|
|
}
|
|
#endif
|
|
return (0);
|
|
}
|
|
/* ok we have a destination that needs a beat */
|
|
/* lets do the theshold management Qiaobing style */
|
|
if (user_req == 0) {
|
|
if (sctp_threshold_management(stcb->sctp_ep, stcb, net,
|
|
stcb->asoc.max_send_times)) {
|
|
/* we have lost the association, in a way this
|
|
* is quite bad since we really are one less time
|
|
* since we really did not send yet. This is the
|
|
* down side to the Q's style as defined in the RFC
|
|
* and not my alternate style defined in the RFC.
|
|
*/
|
|
if (chk->data != NULL) {
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
}
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
|
|
sctppcbinfo.ipi_count_chunk--;
|
|
if ((int)sctppcbinfo.ipi_count_chunk < 0) {
|
|
panic("Chunk count is negative");
|
|
}
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
return (-1);
|
|
}
|
|
}
|
|
net->hb_responded = 0;
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
|
|
printf("Inserting chunk for HB\n");
|
|
}
|
|
#endif
|
|
TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
|
|
stcb->asoc.ctrl_queue_cnt++;
|
|
sctp_pegs[SCTP_HB_SENT]++;
|
|
/*
|
|
* Call directly med level routine to put out the chunk. It will
|
|
* always tumble out control chunks aka HB but it may even tumble
|
|
* out data too.
|
|
*/
|
|
if (user_req == 0) {
|
|
/* Ok now lets start the HB timer if it is NOT a user req */
|
|
sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
|
|
stcb, net);
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
void
|
|
sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
|
|
uint32_t high_tsn)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_ecne_chunk *ecne;
|
|
struct sctp_tmit_chunk *chk;
|
|
asoc = &stcb->asoc;
|
|
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
|
|
if (chk->rec.chunk_id == SCTP_ECN_ECHO) {
|
|
/* found a previous ECN_ECHO update it if needed */
|
|
ecne = mtod(chk->data, struct sctp_ecne_chunk *);
|
|
ecne->tsn = htonl(high_tsn);
|
|
return;
|
|
}
|
|
}
|
|
/* nope could not find one to update so we must build one */
|
|
chk = (struct sctp_tmit_chunk *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_chunk);
|
|
if (chk == NULL) {
|
|
return;
|
|
}
|
|
sctp_pegs[SCTP_ECNE_SENT]++;
|
|
sctppcbinfo.ipi_count_chunk++;
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
chk->rec.chunk_id = SCTP_ECN_ECHO;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->send_size = sizeof(struct sctp_ecne_chunk);
|
|
MGETHDR(chk->data, M_DONTWAIT, MT_DATA);
|
|
if (chk->data == NULL) {
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
|
|
sctppcbinfo.ipi_count_chunk--;
|
|
if ((int)sctppcbinfo.ipi_count_chunk < 0) {
|
|
panic("Chunk count is negative");
|
|
}
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
return;
|
|
}
|
|
chk->data->m_data += SCTP_MIN_OVERHEAD;
|
|
chk->data->m_pkthdr.len = chk->data->m_len = chk->send_size;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->whoTo = net;
|
|
chk->whoTo->ref_count++;
|
|
ecne = mtod(chk->data, struct sctp_ecne_chunk *);
|
|
ecne->ch.chunk_type = SCTP_ECN_ECHO;
|
|
ecne->ch.chunk_flags = 0;
|
|
ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
|
|
ecne->tsn = htonl(high_tsn);
|
|
TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
|
|
asoc->ctrl_queue_cnt++;
|
|
}
|
|
|
|
void
|
|
sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
|
|
struct mbuf *m, int iphlen, int bad_crc)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_pktdrop_chunk *drp;
|
|
struct sctp_tmit_chunk *chk;
|
|
uint8_t *datap;
|
|
int len;
|
|
unsigned int small_one;
|
|
struct ip *iph;
|
|
|
|
long spc;
|
|
asoc = &stcb->asoc;
|
|
if (asoc->peer_supports_pktdrop == 0) {
|
|
/* peer must declare support before I
|
|
* send one.
|
|
*/
|
|
return;
|
|
}
|
|
chk = (struct sctp_tmit_chunk *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_chunk);
|
|
if (chk == NULL) {
|
|
return;
|
|
}
|
|
sctppcbinfo.ipi_count_chunk++;
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
|
|
iph = mtod(m, struct ip *);
|
|
if (iph == NULL) {
|
|
return;
|
|
}
|
|
if (iph->ip_v == IPVERSION) {
|
|
/* IPv4 */
|
|
#if defined(__FreeBSD__)
|
|
len = chk->send_size = iph->ip_len;
|
|
#else
|
|
len = chk->send_size = (iph->ip_len - iphlen);
|
|
#endif
|
|
} else {
|
|
struct ip6_hdr *ip6h;
|
|
/* IPv6 */
|
|
ip6h = mtod(m, struct ip6_hdr *);
|
|
len = chk->send_size = htons(ip6h->ip6_plen);
|
|
}
|
|
if ((len+iphlen) > m->m_pkthdr.len) {
|
|
/* huh */
|
|
chk->send_size = len = m->m_pkthdr.len - iphlen;
|
|
}
|
|
chk->asoc = &stcb->asoc;
|
|
MGETHDR(chk->data, M_DONTWAIT, MT_DATA);
|
|
if (chk->data == NULL) {
|
|
jump_out:
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
|
|
sctppcbinfo.ipi_count_chunk--;
|
|
if ((int)sctppcbinfo.ipi_count_chunk < 0) {
|
|
panic("Chunk count is negative");
|
|
}
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
return;
|
|
}
|
|
if ((chk->send_size+sizeof(struct sctp_pktdrop_chunk)+SCTP_MIN_OVERHEAD) > MHLEN) {
|
|
MCLGET(chk->data, M_DONTWAIT);
|
|
if ((chk->data->m_flags & M_EXT) == 0) {
|
|
/* Give up */
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
goto jump_out;
|
|
}
|
|
}
|
|
chk->data->m_data += SCTP_MIN_OVERHEAD;
|
|
drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
|
|
if (drp == NULL) {
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
goto jump_out;
|
|
}
|
|
small_one = asoc->smallest_mtu;
|
|
if (small_one > MCLBYTES) {
|
|
/* Only one cluster worth of data MAX */
|
|
small_one = MCLBYTES;
|
|
}
|
|
chk->book_size = (chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
|
|
sizeof(struct sctphdr) + SCTP_MED_OVERHEAD);
|
|
if (chk->book_size > small_one) {
|
|
drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
|
|
drp->trunc_len = htons(chk->send_size);
|
|
chk->send_size = small_one - (SCTP_MED_OVERHEAD +
|
|
sizeof(struct sctp_pktdrop_chunk) +
|
|
sizeof(struct sctphdr));
|
|
len = chk->send_size;
|
|
} else {
|
|
/* no truncation needed */
|
|
drp->ch.chunk_flags = 0;
|
|
drp->trunc_len = htons(0);
|
|
}
|
|
if (bad_crc) {
|
|
drp->ch.chunk_flags |= SCTP_BADCRC;
|
|
}
|
|
chk->send_size += sizeof(struct sctp_pktdrop_chunk);
|
|
chk->data->m_pkthdr.len = chk->data->m_len = chk->send_size;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
if (net) {
|
|
/* we should hit here */
|
|
chk->whoTo = net;
|
|
} else {
|
|
chk->whoTo = asoc->primary_destination;
|
|
}
|
|
chk->whoTo->ref_count++;
|
|
chk->rec.chunk_id = SCTP_PACKET_DROPPED;
|
|
drp->ch.chunk_type = SCTP_PACKET_DROPPED;
|
|
drp->ch.chunk_length = htons(chk->send_size);
|
|
spc = stcb->sctp_socket->so_rcv.sb_hiwat;
|
|
if (spc < 0) {
|
|
spc = 0;
|
|
}
|
|
drp->bottle_bw = htonl(spc);
|
|
drp->current_onq = htonl(asoc->size_on_delivery_queue +
|
|
asoc->size_on_reasm_queue +
|
|
asoc->size_on_all_streams +
|
|
asoc->my_rwnd_control_len +
|
|
stcb->sctp_socket->so_rcv.sb_cc);
|
|
drp->reserved = 0;
|
|
datap = drp->data;
|
|
m_copydata(m, iphlen, len, datap);
|
|
TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
|
|
asoc->ctrl_queue_cnt++;
|
|
}
|
|
|
|
void
|
|
sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_cwr_chunk *cwr;
|
|
struct sctp_tmit_chunk *chk;
|
|
|
|
asoc = &stcb->asoc;
|
|
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
|
|
if (chk->rec.chunk_id == SCTP_ECN_CWR) {
|
|
/* found a previous ECN_CWR update it if needed */
|
|
cwr = mtod(chk->data, struct sctp_cwr_chunk *);
|
|
if (compare_with_wrap(high_tsn, ntohl(cwr->tsn),
|
|
MAX_TSN)) {
|
|
cwr->tsn = htonl(high_tsn);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
/* nope could not find one to update so we must build one */
|
|
chk = (struct sctp_tmit_chunk *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_chunk);
|
|
if (chk == NULL) {
|
|
return;
|
|
}
|
|
sctppcbinfo.ipi_count_chunk++;
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
chk->rec.chunk_id = SCTP_ECN_CWR;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->send_size = sizeof(struct sctp_cwr_chunk);
|
|
MGETHDR(chk->data, M_DONTWAIT, MT_DATA);
|
|
if (chk->data == NULL) {
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
|
|
sctppcbinfo.ipi_count_chunk--;
|
|
if ((int)sctppcbinfo.ipi_count_chunk < 0) {
|
|
panic("Chunk count is negative");
|
|
}
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
return;
|
|
}
|
|
chk->data->m_data += SCTP_MIN_OVERHEAD;
|
|
chk->data->m_pkthdr.len = chk->data->m_len = chk->send_size;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->whoTo = net;
|
|
chk->whoTo->ref_count++;
|
|
cwr = mtod(chk->data, struct sctp_cwr_chunk *);
|
|
cwr->ch.chunk_type = SCTP_ECN_CWR;
|
|
cwr->ch.chunk_flags = 0;
|
|
cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
|
|
cwr->tsn = htonl(high_tsn);
|
|
TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
|
|
asoc->ctrl_queue_cnt++;
|
|
}
|
|
static void
|
|
sctp_reset_the_streams(struct sctp_tcb *stcb,
|
|
struct sctp_stream_reset_request *req, int number_entries, uint16_t *list)
|
|
{
|
|
int i;
|
|
|
|
if (req->reset_flags & SCTP_RESET_ALL) {
|
|
for (i=0; i<stcb->asoc.streamoutcnt; i++) {
|
|
stcb->asoc.strmout[i].next_sequence_sent = 0;
|
|
}
|
|
} else if (number_entries) {
|
|
for (i=0; i<number_entries; i++) {
|
|
if (list[i] >= stcb->asoc.streamoutcnt) {
|
|
/* no such stream */
|
|
continue;
|
|
}
|
|
stcb->asoc.strmout[(list[i])].next_sequence_sent = 0;
|
|
}
|
|
}
|
|
sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list);
|
|
}
|
|
|
|
void
|
|
sctp_send_str_reset_ack(struct sctp_tcb *stcb,
|
|
struct sctp_stream_reset_request *req)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_stream_reset_resp *strack;
|
|
struct sctp_tmit_chunk *chk;
|
|
uint32_t seq;
|
|
int number_entries, i;
|
|
uint8_t two_way=0, not_peer=0;
|
|
uint16_t *list=NULL;
|
|
|
|
asoc = &stcb->asoc;
|
|
if (req->reset_flags & SCTP_RESET_ALL)
|
|
number_entries = 0;
|
|
else
|
|
number_entries = (ntohs(req->ph.param_length) - sizeof(struct sctp_stream_reset_request)) / sizeof(uint16_t);
|
|
|
|
chk = (struct sctp_tmit_chunk *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_chunk);
|
|
if (chk == NULL) {
|
|
return;
|
|
}
|
|
sctppcbinfo.ipi_count_chunk++;
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
chk->rec.chunk_id = SCTP_STREAM_RESET;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->send_size = sizeof(struct sctp_stream_reset_resp) + (number_entries * sizeof(uint16_t));
|
|
MGETHDR(chk->data, M_DONTWAIT, MT_DATA);
|
|
if (chk->data == NULL) {
|
|
strresp_jump_out:
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
|
|
sctppcbinfo.ipi_count_chunk--;
|
|
if ((int)sctppcbinfo.ipi_count_chunk < 0) {
|
|
panic("Chunk count is negative");
|
|
}
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
return;
|
|
}
|
|
chk->data->m_data += SCTP_MIN_OVERHEAD;
|
|
chk->data->m_pkthdr.len = chk->data->m_len = SCTP_SIZE32(chk->send_size);
|
|
if (M_TRAILINGSPACE(chk->data) < (int)SCTP_SIZE32(chk->send_size)) {
|
|
MCLGET(chk->data, M_DONTWAIT);
|
|
if ((chk->data->m_flags & M_EXT) == 0) {
|
|
/* Give up */
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
goto strresp_jump_out;
|
|
}
|
|
chk->data->m_data += SCTP_MIN_OVERHEAD;
|
|
}
|
|
if (M_TRAILINGSPACE(chk->data) < (int)SCTP_SIZE32(chk->send_size)) {
|
|
/* can't do it, no room */
|
|
/* Give up */
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
goto strresp_jump_out;
|
|
|
|
}
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->whoTo = asoc->primary_destination;
|
|
chk->whoTo->ref_count++;
|
|
strack = mtod(chk->data, struct sctp_stream_reset_resp *);
|
|
|
|
strack->ch.chunk_type = SCTP_STREAM_RESET;
|
|
strack->ch.chunk_flags = 0;
|
|
strack->ch.chunk_length = htons(chk->send_size);
|
|
|
|
memset(strack->sr_resp.reset_pad, 0, sizeof(strack->sr_resp.reset_pad));
|
|
|
|
strack->sr_resp.ph.param_type = ntohs(SCTP_STR_RESET_RESPONSE);
|
|
strack->sr_resp.ph.param_length = htons((chk->send_size - sizeof(struct sctp_chunkhdr)));
|
|
|
|
|
|
|
|
if (chk->send_size % 4) {
|
|
/* need a padding for the end */
|
|
int pad;
|
|
uint8_t *end;
|
|
end = (uint8_t *)((vaddr_t)strack + chk->send_size);
|
|
pad = chk->send_size % 4;
|
|
for (i = 0; i < pad; i++) {
|
|
end[i] = 0;
|
|
}
|
|
chk->send_size += pad;
|
|
}
|
|
|
|
/* actual response */
|
|
if (req->reset_flags & SCTP_RESET_YOUR) {
|
|
strack->sr_resp.reset_flags = SCTP_RESET_PERFORMED;
|
|
} else {
|
|
strack->sr_resp.reset_flags = 0;
|
|
}
|
|
|
|
/* copied from reset request */
|
|
strack->sr_resp.reset_req_seq_resp = req->reset_req_seq;
|
|
seq = ntohl(req->reset_req_seq);
|
|
|
|
list = req->list_of_streams;
|
|
/* copy the un-converted network byte order streams */
|
|
for (i=0; i<number_entries; i++) {
|
|
strack->sr_resp.list_of_streams[i] = list[i];
|
|
}
|
|
if (asoc->str_reset_seq_in == seq) {
|
|
/* is it the next expected? */
|
|
asoc->str_reset_seq_in++;
|
|
strack->sr_resp.reset_at_tsn = htonl(asoc->sending_seq);
|
|
asoc->str_reset_sending_seq = asoc->sending_seq;
|
|
if (number_entries) {
|
|
uint16_t temp;
|
|
/* convert them to host byte order */
|
|
for (i=0 ; i<number_entries; i++) {
|
|
temp = ntohs(list[i]);
|
|
list[i] = temp;
|
|
}
|
|
}
|
|
if (req->reset_flags & SCTP_RESET_YOUR) {
|
|
/* reset my outbound streams */
|
|
sctp_reset_the_streams(stcb, req , number_entries, list);
|
|
}
|
|
if (req->reset_flags & SCTP_RECIPRICAL) {
|
|
/* reset peer too */
|
|
sctp_send_str_reset_req(stcb, number_entries, list, two_way, not_peer);
|
|
}
|
|
|
|
} else {
|
|
/* no its a retran so I must just ack and do nothing */
|
|
strack->sr_resp.reset_at_tsn = htonl(asoc->str_reset_sending_seq);
|
|
}
|
|
strack->sr_resp.cumulative_tsn = htonl(asoc->cumulative_tsn);
|
|
TAILQ_INSERT_TAIL(&asoc->control_send_queue,
|
|
chk,
|
|
sctp_next);
|
|
asoc->ctrl_queue_cnt++;
|
|
}
|
|
|
|
|
|
void
|
|
sctp_send_str_reset_req(struct sctp_tcb *stcb,
|
|
int number_entrys, uint16_t *list, uint8_t two_way, uint8_t not_peer)
|
|
{
|
|
/* Send a stream reset request. The number_entrys may be 0 and list NULL
|
|
* if the request is to reset all streams. If two_way is true then we
|
|
* not only request a RESET of the received streams but we also
|
|
* request the peer to send a reset req to us too.
|
|
* Flag combinations in table:
|
|
*
|
|
* two_way | not_peer | = | Flags
|
|
* ------------------------------
|
|
* 0 | 0 | = | SCTP_RESET_YOUR (just the peer)
|
|
* 1 | 0 | = | SCTP_RESET_YOUR | SCTP_RECIPRICAL (both sides)
|
|
* 0 | 1 | = | Not a Valid Request (not anyone)
|
|
* 1 | 1 | = | SCTP_RESET_RECIPRICAL (Just local host)
|
|
*/
|
|
struct sctp_association *asoc;
|
|
struct sctp_stream_reset_req *strreq;
|
|
struct sctp_tmit_chunk *chk;
|
|
|
|
|
|
asoc = &stcb->asoc;
|
|
if (asoc->stream_reset_outstanding) {
|
|
/* Already one pending, must get ACK back
|
|
* to clear the flag.
|
|
*/
|
|
return;
|
|
}
|
|
|
|
if ((two_way == 0) && (not_peer == 1)) {
|
|
/* not a valid request */
|
|
return;
|
|
}
|
|
|
|
chk = (struct sctp_tmit_chunk *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_chunk);
|
|
if (chk == NULL) {
|
|
return;
|
|
}
|
|
sctppcbinfo.ipi_count_chunk++;
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
chk->rec.chunk_id = SCTP_STREAM_RESET;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->send_size = sizeof(struct sctp_stream_reset_req) + (number_entrys * sizeof(uint16_t));
|
|
MGETHDR(chk->data, M_DONTWAIT, MT_DATA);
|
|
if (chk->data == NULL) {
|
|
strreq_jump_out:
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
|
|
sctppcbinfo.ipi_count_chunk--;
|
|
if ((int)sctppcbinfo.ipi_count_chunk < 0) {
|
|
panic("Chunk count is negative");
|
|
}
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
return;
|
|
}
|
|
chk->data->m_data += SCTP_MIN_OVERHEAD;
|
|
chk->data->m_pkthdr.len = chk->data->m_len = SCTP_SIZE32(chk->send_size);
|
|
if (M_TRAILINGSPACE(chk->data) < (int)SCTP_SIZE32(chk->send_size)) {
|
|
MCLGET(chk->data, M_DONTWAIT);
|
|
if ((chk->data->m_flags & M_EXT) == 0) {
|
|
/* Give up */
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
goto strreq_jump_out;
|
|
}
|
|
chk->data->m_data += SCTP_MIN_OVERHEAD;
|
|
}
|
|
if (M_TRAILINGSPACE(chk->data) < (int)SCTP_SIZE32(chk->send_size)) {
|
|
/* can't do it, no room */
|
|
/* Give up */
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
goto strreq_jump_out;
|
|
}
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->whoTo = asoc->primary_destination;
|
|
chk->whoTo->ref_count++;
|
|
|
|
strreq = mtod(chk->data, struct sctp_stream_reset_req *);
|
|
strreq->ch.chunk_type = SCTP_STREAM_RESET;
|
|
strreq->ch.chunk_flags = 0;
|
|
strreq->ch.chunk_length = htons(chk->send_size);
|
|
|
|
strreq->sr_req.ph.param_type = ntohs(SCTP_STR_RESET_REQUEST);
|
|
strreq->sr_req.ph.param_length = htons((chk->send_size - sizeof(struct sctp_chunkhdr)));
|
|
|
|
if (chk->send_size % 4) {
|
|
/* need a padding for the end */
|
|
int pad, i;
|
|
uint8_t *end;
|
|
end = (uint8_t *)((vaddr_t)strreq + chk->send_size);
|
|
pad = chk->send_size % 4;
|
|
for (i=0; i<pad; i++) {
|
|
end[i] = 0;
|
|
}
|
|
chk->send_size += pad;
|
|
}
|
|
|
|
strreq->sr_req.reset_flags = 0;
|
|
if (number_entrys == 0) {
|
|
strreq->sr_req.reset_flags |= SCTP_RESET_ALL;
|
|
}
|
|
if (two_way == 0) {
|
|
strreq->sr_req.reset_flags |= SCTP_RESET_YOUR;
|
|
} else {
|
|
if (not_peer == 0) {
|
|
strreq->sr_req.reset_flags |= SCTP_RECIPRICAL | SCTP_RESET_YOUR;
|
|
} else {
|
|
strreq->sr_req.reset_flags |= SCTP_RECIPRICAL;
|
|
}
|
|
}
|
|
memset(strreq->sr_req.reset_pad, 0, sizeof(strreq->sr_req.reset_pad));
|
|
strreq->sr_req.reset_req_seq = htonl(asoc->str_reset_seq_out);
|
|
if (number_entrys) {
|
|
/* populate the specific entry's */
|
|
int i;
|
|
for (i=0; i < number_entrys; i++) {
|
|
strreq->sr_req.list_of_streams[i] = htons(list[i]);
|
|
}
|
|
}
|
|
TAILQ_INSERT_TAIL(&asoc->control_send_queue,
|
|
chk,
|
|
sctp_next);
|
|
asoc->ctrl_queue_cnt++;
|
|
sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
|
|
asoc->stream_reset_outstanding = 1;
|
|
}
|
|
|
|
void
|
|
sctp_send_abort(struct mbuf *m, int iphlen, struct sctphdr *sh, uint32_t vtag,
|
|
struct mbuf *err_cause)
|
|
{
|
|
/*
|
|
* Formulate the abort message, and send it back down.
|
|
*/
|
|
struct mbuf *mout;
|
|
struct sctp_abort_msg *abm;
|
|
struct ip *iph, *iph_out;
|
|
struct ip6_hdr *ip6, *ip6_out;
|
|
int iphlen_out;
|
|
|
|
/* don't respond to ABORT with ABORT */
|
|
if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
|
|
if (err_cause)
|
|
sctp_m_freem(err_cause);
|
|
return;
|
|
}
|
|
MGETHDR(mout, M_DONTWAIT, MT_HEADER);
|
|
if (mout == NULL) {
|
|
if (err_cause)
|
|
sctp_m_freem(err_cause);
|
|
return;
|
|
}
|
|
iph = mtod(m, struct ip *);
|
|
iph_out = NULL;
|
|
ip6_out = NULL;
|
|
if (iph->ip_v == IPVERSION) {
|
|
iph_out = mtod(mout, struct ip *);
|
|
mout->m_len = sizeof(*iph_out) + sizeof(*abm);
|
|
mout->m_next = err_cause;
|
|
|
|
/* Fill in the IP header for the ABORT */
|
|
iph_out->ip_v = IPVERSION;
|
|
iph_out->ip_hl = (sizeof(struct ip) / 4);
|
|
iph_out->ip_tos = (u_char)0;
|
|
iph_out->ip_id = 0;
|
|
iph_out->ip_off = 0;
|
|
iph_out->ip_ttl = MAXTTL;
|
|
iph_out->ip_p = IPPROTO_SCTP;
|
|
iph_out->ip_src.s_addr = iph->ip_dst.s_addr;
|
|
iph_out->ip_dst.s_addr = iph->ip_src.s_addr;
|
|
/* let IP layer calculate this */
|
|
iph_out->ip_sum = 0;
|
|
|
|
iphlen_out = sizeof(*iph_out);
|
|
abm = (struct sctp_abort_msg *)((vaddr_t)iph_out + iphlen_out);
|
|
} else if (iph->ip_v == (IPV6_VERSION >> 4)) {
|
|
ip6 = (struct ip6_hdr *)iph;
|
|
ip6_out = mtod(mout, struct ip6_hdr *);
|
|
mout->m_len = sizeof(*ip6_out) + sizeof(*abm);
|
|
mout->m_next = err_cause;
|
|
|
|
/* Fill in the IP6 header for the ABORT */
|
|
ip6_out->ip6_flow = ip6->ip6_flow;
|
|
ip6_out->ip6_hlim = ip6_defhlim;
|
|
ip6_out->ip6_nxt = IPPROTO_SCTP;
|
|
ip6_out->ip6_src = ip6->ip6_dst;
|
|
ip6_out->ip6_dst = ip6->ip6_src;
|
|
|
|
iphlen_out = sizeof(*ip6_out);
|
|
abm = (struct sctp_abort_msg *)((vaddr_t)ip6_out + iphlen_out);
|
|
} else {
|
|
/* Currently not supported */
|
|
return;
|
|
}
|
|
|
|
abm->sh.src_port = sh->dest_port;
|
|
abm->sh.dest_port = sh->src_port;
|
|
abm->sh.checksum = 0;
|
|
if (vtag == 0) {
|
|
abm->sh.v_tag = sh->v_tag;
|
|
abm->msg.ch.chunk_flags = SCTP_HAD_NO_TCB;
|
|
} else {
|
|
abm->sh.v_tag = htonl(vtag);
|
|
abm->msg.ch.chunk_flags = 0;
|
|
}
|
|
abm->msg.ch.chunk_type = SCTP_ABORT_ASSOCIATION;
|
|
|
|
if (err_cause) {
|
|
struct mbuf *m_tmp = err_cause;
|
|
int err_len = 0;
|
|
/* get length of the err_cause chain */
|
|
while (m_tmp != NULL) {
|
|
err_len += m_tmp->m_len;
|
|
m_tmp = m_tmp->m_next;
|
|
}
|
|
mout->m_pkthdr.len = mout->m_len + err_len;
|
|
if (err_len % 4) {
|
|
/* need pad at end of chunk */
|
|
u_int32_t cpthis=0;
|
|
int padlen;
|
|
padlen = 4 - (mout->m_pkthdr.len % 4);
|
|
m_copyback(mout, mout->m_pkthdr.len, padlen, (void *)&cpthis);
|
|
}
|
|
abm->msg.ch.chunk_length = htons(sizeof(abm->msg.ch) + err_len);
|
|
} else {
|
|
mout->m_pkthdr.len = mout->m_len;
|
|
abm->msg.ch.chunk_length = htons(sizeof(abm->msg.ch));
|
|
}
|
|
|
|
/* add checksum */
|
|
if ((sctp_no_csum_on_loopback) && m_get_rcvif_NOMPSAFE(m) != NULL &&
|
|
m_get_rcvif_NOMPSAFE(m)->if_type == IFT_LOOP) {
|
|
abm->sh.checksum = 0;
|
|
} else {
|
|
abm->sh.checksum = sctp_calculate_sum(mout, NULL, iphlen_out);
|
|
}
|
|
|
|
/* zap the rcvif, it should be null */
|
|
m_reset_rcvif(mout);
|
|
if (iph_out != NULL) {
|
|
struct route ro;
|
|
|
|
/* zap the stack pointer to the route */
|
|
memset(&ro, 0, sizeof ro);
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT2) {
|
|
printf("sctp_send_abort calling ip_output:\n");
|
|
sctp_print_address_pkt(iph_out, &abm->sh);
|
|
}
|
|
#endif
|
|
/* set IPv4 length */
|
|
iph_out->ip_len = htons(mout->m_pkthdr.len);
|
|
/* out it goes */
|
|
(void)ip_output(mout, 0, &ro, IP_RAWOUTPUT, NULL, NULL);
|
|
} else if (ip6_out != NULL) {
|
|
struct route ro;
|
|
|
|
/* zap the stack pointer to the route */
|
|
memset(&ro, 0, sizeof(ro));
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT2) {
|
|
printf("sctp_send_abort calling ip6_output:\n");
|
|
sctp_print_address_pkt((struct ip *)ip6_out, &abm->sh);
|
|
}
|
|
#endif
|
|
ip6_output(mout, NULL, &ro, 0, NULL, NULL, NULL);
|
|
}
|
|
sctp_pegs[SCTP_DATAGRAMS_SENT]++;
|
|
}
|
|
|
|
void
|
|
sctp_send_operr_to(struct mbuf *m, int iphlen,
|
|
struct mbuf *scm,
|
|
uint32_t vtag)
|
|
{
|
|
struct sctphdr *ihdr;
|
|
struct sctphdr *ohdr;
|
|
struct sctp_chunkhdr *ophdr;
|
|
|
|
struct ip *iph;
|
|
#ifdef SCTP_DEBUG
|
|
struct sockaddr_in6 lsa6, fsa6;
|
|
#endif
|
|
uint32_t val;
|
|
iph = mtod(m, struct ip *);
|
|
ihdr = (struct sctphdr *)((vaddr_t)iph + iphlen);
|
|
if (!(scm->m_flags & M_PKTHDR)) {
|
|
/* must be a pkthdr */
|
|
printf("Huh, not a packet header in send_operr\n");
|
|
m_freem(scm);
|
|
return;
|
|
}
|
|
M_PREPEND(scm, (sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr)), M_DONTWAIT);
|
|
if (scm == NULL) {
|
|
/* can't send because we can't add a mbuf */
|
|
return;
|
|
}
|
|
ohdr = mtod(scm, struct sctphdr *);
|
|
ohdr->src_port = ihdr->dest_port;
|
|
ohdr->dest_port = ihdr->src_port;
|
|
ohdr->v_tag = vtag;
|
|
ohdr->checksum = 0;
|
|
ophdr = (struct sctp_chunkhdr *)(ohdr + 1);
|
|
ophdr->chunk_type = SCTP_OPERATION_ERROR;
|
|
ophdr->chunk_flags = 0;
|
|
ophdr->chunk_length = htons(scm->m_pkthdr.len - sizeof(struct sctphdr));
|
|
if (scm->m_pkthdr.len % 4) {
|
|
/* need padding */
|
|
u_int32_t cpthis=0;
|
|
int padlen;
|
|
padlen = 4 - (scm->m_pkthdr.len % 4);
|
|
m_copyback(scm, scm->m_pkthdr.len, padlen, (void *)&cpthis);
|
|
}
|
|
if ((sctp_no_csum_on_loopback) && m_get_rcvif_NOMPSAFE(m) != NULL &&
|
|
m_get_rcvif_NOMPSAFE(m)->if_type == IFT_LOOP) {
|
|
val = 0;
|
|
} else {
|
|
val = sctp_calculate_sum(scm, NULL, 0);
|
|
}
|
|
ohdr->checksum = val;
|
|
if (iph->ip_v == IPVERSION) {
|
|
/* V4 */
|
|
struct ip *out;
|
|
struct route ro;
|
|
M_PREPEND(scm, sizeof(struct ip), M_DONTWAIT);
|
|
if (scm == NULL)
|
|
return;
|
|
memset(&ro, 0, sizeof ro);
|
|
out = mtod(scm, struct ip *);
|
|
out->ip_v = iph->ip_v;
|
|
out->ip_hl = (sizeof(struct ip)/4);
|
|
out->ip_tos = iph->ip_tos;
|
|
out->ip_id = iph->ip_id;
|
|
out->ip_off = 0;
|
|
out->ip_ttl = MAXTTL;
|
|
out->ip_p = IPPROTO_SCTP;
|
|
out->ip_sum = 0;
|
|
out->ip_src = iph->ip_dst;
|
|
out->ip_dst = iph->ip_src;
|
|
out->ip_len = htons(scm->m_pkthdr.len);
|
|
ip_output(scm, 0, &ro, IP_RAWOUTPUT, NULL, NULL);
|
|
sctp_pegs[SCTP_DATAGRAMS_SENT]++;
|
|
} else {
|
|
/* V6 */
|
|
struct route ro;
|
|
struct ip6_hdr *out6, *in6;
|
|
|
|
M_PREPEND(scm, sizeof(struct ip6_hdr), M_DONTWAIT);
|
|
if (scm == NULL)
|
|
return;
|
|
memset(&ro, 0, sizeof ro);
|
|
in6 = mtod(m, struct ip6_hdr *);
|
|
out6 = mtod(scm, struct ip6_hdr *);
|
|
out6->ip6_flow = in6->ip6_flow;
|
|
out6->ip6_hlim = ip6_defhlim;
|
|
out6->ip6_nxt = IPPROTO_SCTP;
|
|
out6->ip6_src = in6->ip6_dst;
|
|
out6->ip6_dst = in6->ip6_src;
|
|
|
|
#ifdef SCTP_DEBUG
|
|
memset(&lsa6, 0, sizeof(lsa6));
|
|
lsa6.sin6_len = sizeof(lsa6);
|
|
lsa6.sin6_family = AF_INET6;
|
|
lsa6.sin6_addr = out6->ip6_src;
|
|
memset(&fsa6, 0, sizeof(fsa6));
|
|
fsa6.sin6_len = sizeof(fsa6);
|
|
fsa6.sin6_family = AF_INET6;
|
|
fsa6.sin6_addr = out6->ip6_dst;
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT2) {
|
|
printf("sctp_operr_to calling ipv6 output:\n");
|
|
printf("src: ");
|
|
sctp_print_address((struct sockaddr *)&lsa6);
|
|
printf("dst ");
|
|
sctp_print_address((struct sockaddr *)&fsa6);
|
|
}
|
|
#endif /* SCTP_DEBUG */
|
|
ip6_output(scm, NULL, &ro, 0, NULL, NULL, NULL);
|
|
sctp_pegs[SCTP_DATAGRAMS_SENT]++;
|
|
}
|
|
}
|
|
|
|
static int
|
|
sctp_copy_one(struct mbuf *m, struct uio *uio, int cpsz, int resv_upfront, int *mbcnt)
|
|
{
|
|
int left, cancpy, willcpy, error;
|
|
left = cpsz;
|
|
|
|
if (m == NULL) {
|
|
/* TSNH */
|
|
*mbcnt = 0;
|
|
return (ENOMEM);
|
|
}
|
|
m->m_len = 0;
|
|
if ((left+resv_upfront) > (int)MHLEN) {
|
|
MCLGET(m, M_WAIT);
|
|
if (m == NULL) {
|
|
*mbcnt = 0;
|
|
return (ENOMEM);
|
|
}
|
|
if ((m->m_flags & M_EXT) == 0) {
|
|
*mbcnt = 0;
|
|
return (ENOMEM);
|
|
}
|
|
*mbcnt += m->m_ext.ext_size;
|
|
}
|
|
*mbcnt += MSIZE;
|
|
cancpy = M_TRAILINGSPACE(m);
|
|
willcpy = uimin(cancpy, left);
|
|
if ((willcpy + resv_upfront) > cancpy) {
|
|
willcpy -= resv_upfront;
|
|
}
|
|
while (left > 0) {
|
|
/* Align data to the end */
|
|
if ((m->m_flags & M_EXT) == 0) {
|
|
m_align(m, willcpy);
|
|
} else {
|
|
MC_ALIGN(m, willcpy);
|
|
}
|
|
error = uiomove(mtod(m, void *), willcpy, uio);
|
|
if (error) {
|
|
return (error);
|
|
}
|
|
m->m_len = willcpy;
|
|
m->m_nextpkt = 0;
|
|
left -= willcpy;
|
|
if (left > 0) {
|
|
MGET(m->m_next, M_WAIT, MT_DATA);
|
|
if (m->m_next == NULL) {
|
|
*mbcnt = 0;
|
|
return (ENOMEM);
|
|
}
|
|
m = m->m_next;
|
|
m->m_len = 0;
|
|
*mbcnt += MSIZE;
|
|
if (left > (int)MHLEN) {
|
|
MCLGET(m, M_WAIT);
|
|
if (m == NULL) {
|
|
*mbcnt = 0;
|
|
return (ENOMEM);
|
|
}
|
|
if ((m->m_flags & M_EXT) == 0) {
|
|
*mbcnt = 0;
|
|
return (ENOMEM);
|
|
}
|
|
*mbcnt += m->m_ext.ext_size;
|
|
}
|
|
cancpy = M_TRAILINGSPACE(m);
|
|
willcpy = uimin(cancpy, left);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
sctp_copy_it_in(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb,
|
|
struct sctp_association *asoc,
|
|
struct sctp_nets *net,
|
|
struct sctp_sndrcvinfo *srcv,
|
|
struct uio *uio,
|
|
int flags)
|
|
{
|
|
/* This routine must be very careful in
|
|
* its work. Protocol processing is
|
|
* up and running so care must be taken to
|
|
* spl...() when you need to do something
|
|
* that may effect the stcb/asoc. The sb is
|
|
* locked however. When data is copied the
|
|
* protocol processing should be enabled since
|
|
* this is a slower operation...
|
|
*/
|
|
struct socket *so;
|
|
int error = 0;
|
|
int frag_size, mbcnt = 0, mbcnt_e = 0;
|
|
unsigned int sndlen;
|
|
unsigned int tot_demand;
|
|
int tot_out, dataout;
|
|
struct sctp_tmit_chunk *chk;
|
|
struct mbuf *mm;
|
|
struct sctp_stream_out *strq;
|
|
uint32_t my_vtag;
|
|
int resv_in_first;
|
|
|
|
so = stcb->sctp_socket;
|
|
solock(so);
|
|
chk = NULL;
|
|
mm = NULL;
|
|
|
|
sndlen = uio->uio_resid;
|
|
/* lock the socket buf */
|
|
error = sblock(&so->so_snd, SBLOCKWAIT(flags));
|
|
if (error)
|
|
goto out_locked;
|
|
|
|
#ifdef SCTP_DEBUG
|
|
printf("sctp_copy_it_in: %d\n", sndlen);
|
|
#endif
|
|
/* will it ever fit ? */
|
|
if (sndlen > so->so_snd.sb_hiwat) {
|
|
/* It will NEVER fit */
|
|
error = EMSGSIZE;
|
|
goto release;
|
|
}
|
|
/* Do I need to block? */
|
|
if ((so->so_snd.sb_hiwat <
|
|
(sndlen + asoc->total_output_queue_size)) ||
|
|
(asoc->chunks_on_out_queue > sctp_max_chunks_on_queue) ||
|
|
(asoc->total_output_mbuf_queue_size >
|
|
so->so_snd.sb_mbmax)
|
|
) {
|
|
/* prune any prsctp bufs out */
|
|
if (asoc->peer_supports_prsctp) {
|
|
sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
|
|
}
|
|
/*
|
|
* We store off a pointer to the endpoint.
|
|
* Since on return from this we must check to
|
|
* see if an so_error is set. If so we may have
|
|
* been reset and our stcb destroyed. Returning
|
|
* an error will flow back to the user...
|
|
*/
|
|
while ((so->so_snd.sb_hiwat <
|
|
(sndlen + asoc->total_output_queue_size)) ||
|
|
(asoc->chunks_on_out_queue >
|
|
sctp_max_chunks_on_queue) ||
|
|
(asoc->total_output_mbuf_queue_size >
|
|
so->so_snd.sb_mbmax)
|
|
) {
|
|
if ((so->so_state & SS_NBIO)
|
|
#if defined(__FreeBSD__) && __FreeBSD_version >= 500000
|
|
|| (flags & MSG_NBIO)
|
|
#endif
|
|
) {
|
|
/* Non-blocking io in place */
|
|
error = EWOULDBLOCK;
|
|
goto release;
|
|
}
|
|
inp->sctp_tcb_at_block = (void *)stcb;
|
|
inp->error_on_block = 0;
|
|
#ifdef SCTP_BLK_LOGGING
|
|
sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
|
|
so, asoc);
|
|
#endif
|
|
sbunlock(&so->so_snd);
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
error = sbwait(&so->so_snd);
|
|
SCTP_INP_RLOCK(inp);
|
|
if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
|
|
(inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
|
|
/* Should I really unlock ? */
|
|
SCTP_INP_RUNLOCK(inp);
|
|
error = EFAULT;
|
|
goto out_locked;
|
|
}
|
|
SCTP_TCB_LOCK(stcb);
|
|
SCTP_INP_RUNLOCK(inp);
|
|
|
|
inp->sctp_tcb_at_block = 0;
|
|
#ifdef SCTP_BLK_LOGGING
|
|
sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
|
|
so, asoc);
|
|
#endif
|
|
if (inp->error_on_block) {
|
|
/*
|
|
* if our asoc was killed, the free code
|
|
* (in sctp_pcb.c) will save a error in
|
|
* here for us
|
|
*/
|
|
error = inp->error_on_block;
|
|
goto out_locked;
|
|
}
|
|
if (error) {
|
|
goto out_locked;
|
|
}
|
|
/* did we encounter a socket error? */
|
|
if (so->so_error) {
|
|
error = so->so_error;
|
|
goto out_locked;
|
|
}
|
|
error = sblock(&so->so_snd, M_WAITOK);
|
|
if (error) {
|
|
/* Can't aquire the lock */
|
|
goto out_locked;
|
|
}
|
|
#if defined(__FreeBSD__) && __FreeBSD_version >= 502115
|
|
if (so->so_rcv.sb_state & SBS_CANTSENDMORE) {
|
|
#else
|
|
if (so->so_state & SS_CANTSENDMORE) {
|
|
#endif
|
|
/* The socket is now set not to sendmore.. its gone */
|
|
error = EPIPE;
|
|
goto release;
|
|
}
|
|
if (so->so_error) {
|
|
error = so->so_error;
|
|
goto release;
|
|
}
|
|
if (asoc->peer_supports_prsctp) {
|
|
sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
|
|
}
|
|
}
|
|
}
|
|
dataout = tot_out = uio->uio_resid;
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
|
|
resv_in_first = SCTP_MED_OVERHEAD;
|
|
} else {
|
|
resv_in_first = SCTP_MED_V4_OVERHEAD;
|
|
}
|
|
|
|
/* Are we aborting? */
|
|
if (srcv->sinfo_flags & SCTP_ABORT) {
|
|
if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
|
|
(SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_ECHOED)) {
|
|
/* It has to be up before we abort */
|
|
/* how big is the user initiated abort? */
|
|
|
|
/* I wonder about doing a MGET without a splnet set.
|
|
* it is done that way in the sosend code so I guess
|
|
* it is ok :-0
|
|
*/
|
|
MGETHDR(mm, M_WAIT, MT_DATA);
|
|
if (mm) {
|
|
struct sctp_paramhdr *ph;
|
|
|
|
tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
|
|
if (tot_demand > MHLEN) {
|
|
if (tot_demand > MCLBYTES) {
|
|
/* truncate user data */
|
|
tot_demand = MCLBYTES;
|
|
tot_out = tot_demand - sizeof(struct sctp_paramhdr);
|
|
}
|
|
MCLGET(mm, M_WAIT);
|
|
if ((mm->m_flags & M_EXT) == 0) {
|
|
/* truncate further */
|
|
tot_demand = MHLEN;
|
|
tot_out = tot_demand - sizeof(struct sctp_paramhdr);
|
|
}
|
|
}
|
|
/* now move forward the data pointer */
|
|
ph = mtod(mm, struct sctp_paramhdr *);
|
|
ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
|
|
ph->param_length = htons((sizeof(struct sctp_paramhdr) + tot_out));
|
|
ph++;
|
|
mm->m_pkthdr.len = tot_out + sizeof(struct sctp_paramhdr);
|
|
mm->m_len = mm->m_pkthdr.len;
|
|
error = uiomove((void *)ph, (int)tot_out, uio);
|
|
if (error) {
|
|
/*
|
|
* Here if we can't get his data we
|
|
* still abort we just don't get to
|
|
* send the users note :-0
|
|
*/
|
|
sctp_m_freem(mm);
|
|
mm = NULL;
|
|
}
|
|
}
|
|
sbunlock(&so->so_snd);
|
|
sctp_abort_an_association(stcb->sctp_ep, stcb,
|
|
SCTP_RESPONSE_TO_USER_REQ,
|
|
mm);
|
|
mm = NULL;
|
|
goto out_locked;
|
|
}
|
|
goto release;
|
|
}
|
|
|
|
/* Now can we send this? */
|
|
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
|
|
(asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
|
|
/* got data while shutting down */
|
|
error = ECONNRESET;
|
|
goto release;
|
|
}
|
|
/* Is the stream no. valid? */
|
|
if (srcv->sinfo_stream >= asoc->streamoutcnt) {
|
|
/* Invalid stream number */
|
|
error = EINVAL;
|
|
goto release;
|
|
}
|
|
if (asoc->strmout == NULL) {
|
|
/* huh? software error */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("software error in sctp_copy_it_in\n");
|
|
}
|
|
#endif
|
|
error = EFAULT;
|
|
goto release;
|
|
}
|
|
if ((srcv->sinfo_flags & SCTP_EOF) &&
|
|
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) &&
|
|
(tot_out == 0)) {
|
|
sounlock(so);
|
|
goto zap_by_it_now;
|
|
}
|
|
if (tot_out == 0) {
|
|
/* not allowed */
|
|
error = EMSGSIZE;
|
|
goto release;
|
|
}
|
|
/* save off the tag */
|
|
my_vtag = asoc->my_vtag;
|
|
strq = &asoc->strmout[srcv->sinfo_stream];
|
|
/* First lets figure out the "chunking" point */
|
|
frag_size = sctp_get_frag_point(stcb, asoc);
|
|
|
|
/* two choices here, it all fits in one chunk or
|
|
* we need multiple chunks.
|
|
*/
|
|
sounlock(so);
|
|
if (tot_out <= frag_size) {
|
|
/* no need to setup a template */
|
|
chk = (struct sctp_tmit_chunk *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_chunk);
|
|
if (chk == NULL) {
|
|
error = ENOMEM;
|
|
goto release;
|
|
}
|
|
sctppcbinfo.ipi_count_chunk++;
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
asoc->chunks_on_out_queue++;
|
|
MGETHDR(mm, M_WAIT, MT_DATA);
|
|
if (mm == NULL) {
|
|
error = ENOMEM;
|
|
goto clean_up;
|
|
}
|
|
error = sctp_copy_one(mm, uio, tot_out, resv_in_first, &mbcnt_e);
|
|
if (error)
|
|
goto clean_up;
|
|
sctp_prepare_chunk(chk, stcb, srcv, strq, net);
|
|
chk->mbcnt = mbcnt_e;
|
|
mbcnt += mbcnt_e;
|
|
mbcnt_e = 0;
|
|
mm->m_pkthdr.len = tot_out;
|
|
chk->data = mm;
|
|
mm = NULL;
|
|
|
|
/* the actual chunk flags */
|
|
chk->rec.data.rcv_flags |= SCTP_DATA_NOT_FRAG;
|
|
chk->whoTo->ref_count++;
|
|
|
|
/* fix up the send_size if it is not present */
|
|
chk->send_size = tot_out;
|
|
chk->book_size = chk->send_size;
|
|
/* ok, we are commited */
|
|
if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) {
|
|
/* bump the ssn if we are unordered. */
|
|
strq->next_sequence_sent++;
|
|
}
|
|
if (chk->flags & SCTP_PR_SCTP_BUFFER) {
|
|
asoc->sent_queue_cnt_removeable++;
|
|
}
|
|
solock(so);
|
|
if ((asoc->state == 0) ||
|
|
(my_vtag != asoc->my_vtag) ||
|
|
(so != inp->sctp_socket) ||
|
|
(inp->sctp_socket == 0)) {
|
|
/* connection was aborted */
|
|
sounlock(so);
|
|
error = ECONNRESET;
|
|
goto clean_up;
|
|
}
|
|
asoc->stream_queue_cnt++;
|
|
TAILQ_INSERT_TAIL(&strq->outqueue, chk, sctp_next);
|
|
/* now check if this stream is on the wheel */
|
|
if ((strq->next_spoke.tqe_next == NULL) &&
|
|
(strq->next_spoke.tqe_prev == NULL)) {
|
|
/* Insert it on the wheel since it is not
|
|
* on it currently
|
|
*/
|
|
sctp_insert_on_wheel(asoc, strq);
|
|
}
|
|
sounlock(so);
|
|
clean_up:
|
|
if (error) {
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
|
|
sctppcbinfo.ipi_count_chunk--;
|
|
if ((int)sctppcbinfo.ipi_count_chunk < 0) {
|
|
panic("Chunk count is negative");
|
|
}
|
|
goto release;
|
|
}
|
|
} else {
|
|
/* we need to setup a template */
|
|
struct sctp_tmit_chunk template;
|
|
struct sctpchunk_listhead tmp;
|
|
|
|
/* setup the template */
|
|
sctp_prepare_chunk(&template, stcb, srcv, strq, net);
|
|
|
|
/* Prepare the temp list */
|
|
TAILQ_INIT(&tmp);
|
|
|
|
/* Template is complete, now time for the work */
|
|
while (tot_out > 0) {
|
|
/* Get a chunk */
|
|
chk = (struct sctp_tmit_chunk *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_chunk);
|
|
if (chk == NULL) {
|
|
/*
|
|
* ok we must spin through and dump anything
|
|
* we have allocated and then jump to the
|
|
* no_membad
|
|
*/
|
|
error = ENOMEM;
|
|
}
|
|
sctppcbinfo.ipi_count_chunk++;
|
|
asoc->chunks_on_out_queue++;
|
|
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
*chk = template;
|
|
chk->whoTo->ref_count++;
|
|
MGETHDR(chk->data, M_WAIT, MT_DATA);
|
|
if (chk->data == NULL) {
|
|
error = ENOMEM;
|
|
goto temp_clean_up;
|
|
}
|
|
tot_demand = uimin(tot_out, frag_size);
|
|
error = sctp_copy_one(chk->data, uio, tot_demand , resv_in_first, &mbcnt_e);
|
|
if (error)
|
|
goto temp_clean_up;
|
|
/* now fix the chk->send_size */
|
|
chk->mbcnt = mbcnt_e;
|
|
mbcnt += mbcnt_e;
|
|
mbcnt_e = 0;
|
|
chk->send_size = tot_demand;
|
|
chk->data->m_pkthdr.len = tot_demand;
|
|
chk->book_size = chk->send_size;
|
|
if (chk->flags & SCTP_PR_SCTP_BUFFER) {
|
|
asoc->sent_queue_cnt_removeable++;
|
|
}
|
|
TAILQ_INSERT_TAIL(&tmp, chk, sctp_next);
|
|
tot_out -= tot_demand;
|
|
}
|
|
/* Now the tmp list holds all chunks and data */
|
|
if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) {
|
|
/* bump the ssn if we are unordered. */
|
|
strq->next_sequence_sent++;
|
|
}
|
|
/* Mark the first/last flags. This will
|
|
* result int a 3 for a single item on the list
|
|
*/
|
|
chk = TAILQ_FIRST(&tmp);
|
|
chk->rec.data.rcv_flags |= SCTP_DATA_FIRST_FRAG;
|
|
chk = TAILQ_LAST(&tmp, sctpchunk_listhead);
|
|
chk->rec.data.rcv_flags |= SCTP_DATA_LAST_FRAG;
|
|
|
|
/* now move it to the streams actual queue */
|
|
/* first stop protocol processing */
|
|
mutex_enter(softnet_lock);
|
|
if ((asoc->state == 0) ||
|
|
(my_vtag != asoc->my_vtag) ||
|
|
(so != inp->sctp_socket) ||
|
|
(inp->sctp_socket == 0)) {
|
|
/* connection was aborted */
|
|
mutex_exit(softnet_lock);
|
|
error = ECONNRESET;
|
|
goto temp_clean_up;
|
|
}
|
|
chk = TAILQ_FIRST(&tmp);
|
|
while (chk) {
|
|
chk->data->m_nextpkt = 0;
|
|
TAILQ_REMOVE(&tmp, chk, sctp_next);
|
|
asoc->stream_queue_cnt++;
|
|
TAILQ_INSERT_TAIL(&strq->outqueue, chk, sctp_next);
|
|
chk = TAILQ_FIRST(&tmp);
|
|
}
|
|
/* now check if this stream is on the wheel */
|
|
if ((strq->next_spoke.tqe_next == NULL) &&
|
|
(strq->next_spoke.tqe_prev == NULL)) {
|
|
/* Insert it on the wheel since it is not
|
|
* on it currently
|
|
*/
|
|
sctp_insert_on_wheel(asoc, strq);
|
|
}
|
|
/* Ok now we can allow pping */
|
|
mutex_exit(softnet_lock);
|
|
temp_clean_up:
|
|
if (error) {
|
|
chk = TAILQ_FIRST(&tmp);
|
|
while (chk) {
|
|
if (chk->data) {
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
}
|
|
TAILQ_REMOVE(&tmp, chk, sctp_next);
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
|
|
sctppcbinfo.ipi_count_chunk--;
|
|
asoc->chunks_on_out_queue--;
|
|
if ((int)sctppcbinfo.ipi_count_chunk < 0) {
|
|
panic("Chunk count is negative");
|
|
}
|
|
sctppcbinfo.ipi_gencnt_chunk++;
|
|
chk = TAILQ_FIRST(&tmp);
|
|
}
|
|
goto release;
|
|
}
|
|
}
|
|
zap_by_it_now:
|
|
#ifdef SCTP_MBCNT_LOGGING
|
|
sctp_log_mbcnt(SCTP_LOG_MBCNT_INCREASE,
|
|
asoc->total_output_queue_size,
|
|
dataout,
|
|
asoc->total_output_mbuf_queue_size,
|
|
mbcnt);
|
|
#endif
|
|
solock(so);
|
|
asoc->total_output_queue_size += dataout;
|
|
asoc->total_output_mbuf_queue_size += mbcnt;
|
|
if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
|
|
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
|
|
so->so_snd.sb_cc += dataout;
|
|
so->so_snd.sb_mbcnt += mbcnt;
|
|
}
|
|
if ((srcv->sinfo_flags & SCTP_EOF) &&
|
|
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE)
|
|
) {
|
|
int some_on_streamwheel = 0;
|
|
error = 0;
|
|
if (!TAILQ_EMPTY(&asoc->out_wheel)) {
|
|
/* Check to see if some data queued */
|
|
struct sctp_stream_out *outs;
|
|
TAILQ_FOREACH(outs, &asoc->out_wheel, next_spoke) {
|
|
if (!TAILQ_EMPTY(&outs->outqueue)) {
|
|
some_on_streamwheel = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (TAILQ_EMPTY(&asoc->send_queue) &&
|
|
TAILQ_EMPTY(&asoc->sent_queue) &&
|
|
(some_on_streamwheel == 0)) {
|
|
/* there is nothing queued to send, so I'm done... */
|
|
if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
|
|
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
|
|
/* only send SHUTDOWN the first time through */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
|
|
printf("%s:%d sends a shutdown\n",
|
|
__FILE__,
|
|
__LINE__
|
|
);
|
|
}
|
|
#endif
|
|
sctp_send_shutdown(stcb, stcb->asoc.primary_destination);
|
|
asoc->state = SCTP_STATE_SHUTDOWN_SENT;
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
|
|
asoc->primary_destination);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
|
|
asoc->primary_destination);
|
|
}
|
|
} else {
|
|
/*
|
|
* we still got (or just got) data to send, so set
|
|
* SHUTDOWN_PENDING
|
|
*/
|
|
/*
|
|
* XXX sockets draft says that SCTP_EOF should be sent
|
|
* with no data. currently, we will allow user data
|
|
* to be sent first and move to SHUTDOWN-PENDING
|
|
*/
|
|
asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
|
|
}
|
|
}
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT2) {
|
|
printf("++total out:%d total_mbuf_out:%d\n",
|
|
(int)asoc->total_output_queue_size,
|
|
(int)asoc->total_output_mbuf_queue_size);
|
|
}
|
|
#endif
|
|
|
|
release:
|
|
sbunlock(&so->so_snd);
|
|
out_locked:
|
|
sounlock(so);
|
|
|
|
if (mm)
|
|
sctp_m_freem(mm);
|
|
return (error);
|
|
}
|
|
|
|
|
|
int
|
|
sctp_sosend(struct socket *so, struct sockaddr *addr, struct uio *uio,
|
|
struct mbuf *top, struct mbuf *control, int flags, struct lwp *p)
|
|
{
|
|
int error, use_rcvinfo;
|
|
int queue_only = 0, queue_only_for_init=0;
|
|
int un_sent = 0;
|
|
int now_filled=0;
|
|
struct sctp_inpcb *inp;
|
|
struct sctp_tcb *stcb=NULL;
|
|
struct sctp_sndrcvinfo srcv;
|
|
struct timeval now;
|
|
struct sctp_nets *net;
|
|
struct sctp_association *asoc;
|
|
struct sctp_inpcb *t_inp;
|
|
int create_lock_applied = 0;
|
|
|
|
error = use_rcvinfo = 0;
|
|
net = NULL;
|
|
stcb = NULL;
|
|
asoc = NULL;
|
|
t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
|
|
|
|
solock(so);
|
|
if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
|
|
(inp->sctp_flags & SCTP_PCB_FLAGS_ACCEPTING)) {
|
|
/* The listner can NOT send */
|
|
error = EFAULT;
|
|
sounlock(so);
|
|
goto out;
|
|
}
|
|
if (addr) {
|
|
SCTP_ASOC_CREATE_LOCK(inp);
|
|
if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
|
|
(inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
|
|
/* Should I really unlock ? */
|
|
error = EFAULT;
|
|
sounlock(so);
|
|
goto out;
|
|
|
|
}
|
|
create_lock_applied = 1;
|
|
if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
|
|
(addr->sa_family == AF_INET6)) {
|
|
error = EINVAL;
|
|
sounlock(so);
|
|
goto out;
|
|
}
|
|
}
|
|
/* now we must find the assoc */
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
|
|
SCTP_INP_RLOCK(inp);
|
|
stcb = LIST_FIRST(&inp->sctp_asoc_list);
|
|
if (stcb == NULL) {
|
|
SCTP_INP_RUNLOCK(inp);
|
|
error = ENOTCONN;
|
|
sounlock(so);
|
|
goto out;
|
|
}
|
|
SCTP_TCB_LOCK(stcb);
|
|
SCTP_INP_RUNLOCK(inp);
|
|
net = stcb->asoc.primary_destination;
|
|
}
|
|
#ifdef SCTP_DEBUG
|
|
printf("sctp_sosend: get control\n");
|
|
#endif
|
|
/* get control */
|
|
if (control) {
|
|
/* process cmsg snd/rcv info (maybe a assoc-id) */
|
|
if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&srcv, control,
|
|
sizeof(srcv))) {
|
|
/* got one */
|
|
if (srcv.sinfo_flags & SCTP_SENDALL) {
|
|
/* its a sendall */
|
|
sctppcbinfo.mbuf_track--;
|
|
sctp_m_freem(control);
|
|
|
|
if (create_lock_applied) {
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
create_lock_applied = 0;
|
|
}
|
|
return (sctp_sendall(inp, uio, top, &srcv));
|
|
}
|
|
use_rcvinfo = 1;
|
|
}
|
|
}
|
|
#ifdef SCTP_DEBUG
|
|
printf("sctp_sosend: doing lookup\n");
|
|
#endif
|
|
if (stcb == NULL) {
|
|
/* Need to do a lookup */
|
|
if (use_rcvinfo && srcv.sinfo_assoc_id) {
|
|
stcb = sctp_findassociation_ep_asocid(inp, srcv.sinfo_assoc_id);
|
|
/*
|
|
* Question: Should I error here if the assoc_id is
|
|
* no longer valid? i.e. I can't find it?
|
|
*/
|
|
if ((stcb) &&
|
|
(addr != NULL)) {
|
|
/* Must locate the net structure */
|
|
net = sctp_findnet(stcb, addr);
|
|
}
|
|
}
|
|
if (stcb == NULL) {
|
|
if (addr != NULL) {
|
|
/* Since we did not use findep we must
|
|
* increment it, and if we don't find a
|
|
* tcb decrement it.
|
|
*/
|
|
SCTP_INP_WLOCK(inp);
|
|
SCTP_INP_INCR_REF(inp);
|
|
SCTP_INP_WUNLOCK(inp);
|
|
stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
|
|
if (stcb == NULL) {
|
|
SCTP_INP_WLOCK(inp);
|
|
SCTP_INP_DECR_REF(inp);
|
|
SCTP_INP_WUNLOCK(inp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if ((stcb == NULL) &&
|
|
(inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
|
|
error = ENOTCONN;
|
|
sounlock(so);
|
|
goto out;
|
|
} else if ((stcb == NULL) && (addr == NULL)) {
|
|
error = ENOENT;
|
|
sounlock(so);
|
|
goto out;
|
|
} else if (stcb == NULL) {
|
|
/* UDP style, we must go ahead and start the INIT process */
|
|
if ((use_rcvinfo) &&
|
|
(srcv.sinfo_flags & SCTP_ABORT)) {
|
|
/* User asks to abort a non-existant asoc */
|
|
error = ENOENT;
|
|
sounlock(so);
|
|
goto out;
|
|
}
|
|
/* get an asoc/stcb struct */
|
|
stcb = sctp_aloc_assoc(inp, addr, 1, &error, 0);
|
|
if (stcb == NULL) {
|
|
/* Error is setup for us in the call */
|
|
sounlock(so);
|
|
goto out;
|
|
}
|
|
if (create_lock_applied) {
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
create_lock_applied = 0;
|
|
} else {
|
|
printf("Huh-3? create lock should have been on??\n");
|
|
}
|
|
/* Turn on queue only flag to prevent data from being sent */
|
|
queue_only = 1;
|
|
asoc = &stcb->asoc;
|
|
asoc->state = SCTP_STATE_COOKIE_WAIT;
|
|
SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
|
|
if (control) {
|
|
/* see if a init structure exists in cmsg headers */
|
|
struct sctp_initmsg initm;
|
|
int i;
|
|
if (sctp_find_cmsg(SCTP_INIT, (void *)&initm, control, sizeof(initm))) {
|
|
/* we have an INIT override of the default */
|
|
if (initm.sinit_max_attempts)
|
|
asoc->max_init_times = initm.sinit_max_attempts;
|
|
if (initm.sinit_num_ostreams)
|
|
asoc->pre_open_streams = initm.sinit_num_ostreams;
|
|
if (initm.sinit_max_instreams)
|
|
asoc->max_inbound_streams = initm.sinit_max_instreams;
|
|
if (initm.sinit_max_init_timeo)
|
|
asoc->initial_init_rto_max = initm.sinit_max_init_timeo;
|
|
if (asoc->streamoutcnt < asoc->pre_open_streams) {
|
|
/* Default is NOT correct */
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("Ok, defout:%d pre_open:%d\n",
|
|
asoc->streamoutcnt, asoc->pre_open_streams);
|
|
}
|
|
#endif
|
|
free(asoc->strmout, M_PCB);
|
|
asoc->strmout = NULL;
|
|
asoc->streamoutcnt = asoc->pre_open_streams;
|
|
|
|
/* What happesn if this fails? .. we panic ...*/
|
|
asoc->strmout = malloc(
|
|
asoc->streamoutcnt *
|
|
sizeof(struct sctp_stream_out),
|
|
M_PCB, M_WAIT);
|
|
for (i = 0; i < asoc->streamoutcnt; i++) {
|
|
/*
|
|
* inbound side must be set to 0xffff,
|
|
* also NOTE when we get the INIT-ACK
|
|
* back (for INIT sender) we MUST
|
|
* reduce the count (streamoutcnt) but
|
|
* first check if we sent to any of the
|
|
* upper streams that were dropped (if
|
|
* some were). Those that were dropped
|
|
* must be notified to the upper layer
|
|
* as failed to send.
|
|
*/
|
|
asoc->strmout[i].next_sequence_sent = 0x0;
|
|
TAILQ_INIT(&asoc->strmout[i].outqueue);
|
|
asoc->strmout[i].stream_no = i;
|
|
asoc->strmout[i].next_spoke.tqe_next = 0;
|
|
asoc->strmout[i].next_spoke.tqe_prev = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
/* out with the INIT */
|
|
queue_only_for_init = 1;
|
|
sctp_send_initiate(inp, stcb);
|
|
/*
|
|
* we may want to dig in after this call and adjust the MTU
|
|
* value. It defaulted to 1500 (constant) but the ro structure
|
|
* may now have an update and thus we may need to change it
|
|
* BEFORE we append the message.
|
|
*/
|
|
net = stcb->asoc.primary_destination;
|
|
asoc = &stcb->asoc;
|
|
} else {
|
|
asoc = &stcb->asoc;
|
|
}
|
|
if (create_lock_applied) {
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
create_lock_applied = 0;
|
|
}
|
|
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
|
|
queue_only = 1;
|
|
}
|
|
if (use_rcvinfo == 0) {
|
|
/* Grab the default stuff from the asoc */
|
|
srcv = stcb->asoc.def_send;
|
|
}
|
|
/* we are now done with all control */
|
|
if (control) {
|
|
sctp_m_freem(control);
|
|
control = NULL;
|
|
}
|
|
|
|
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
|
|
(asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
|
|
if ((use_rcvinfo) &&
|
|
(srcv.sinfo_flags & SCTP_ABORT)) {
|
|
;
|
|
} else {
|
|
error = ECONNRESET;
|
|
sounlock(so);
|
|
goto out;
|
|
}
|
|
}
|
|
/* Ok, we will attempt a msgsnd :> */
|
|
#if 0 /* XXX */
|
|
if (p)
|
|
p->p_stats->p_ru.ru_msgsnd++;
|
|
#endif
|
|
|
|
if (stcb) {
|
|
if (net && ((srcv.sinfo_flags & SCTP_ADDR_OVER))) {
|
|
/* we take the override or the unconfirmed */
|
|
;
|
|
} else {
|
|
net = stcb->asoc.primary_destination;
|
|
}
|
|
}
|
|
|
|
#ifdef SCTP_DEBUG
|
|
printf("sctp_sosend: before copying in %p\n", top);
|
|
#endif
|
|
if (top == NULL) {
|
|
/* Must copy it all in from user land. The
|
|
* socket buf is locked but we don't suspend
|
|
* protocol processing until we are ready to
|
|
* send/queue it.
|
|
*/
|
|
sounlock(so);
|
|
#ifdef SCTP_DEBUG
|
|
printf("sctp_sosend: before cii\n");
|
|
#endif
|
|
error = sctp_copy_it_in(inp, stcb, asoc, net, &srcv, uio, flags);
|
|
#ifdef SCTP_DEBUG
|
|
printf("sctp_sosend: after cii\n");
|
|
#endif
|
|
if (error)
|
|
goto out;
|
|
} else {
|
|
/* Here we must either pull in the user data to chunk
|
|
* buffers, or use top to do a msg_append.
|
|
*/
|
|
error = sctp_msg_append(stcb, net, top, &srcv, flags);
|
|
sounlock(so);
|
|
if (error)
|
|
goto out;
|
|
/* zap the top since it is now being used */
|
|
top = 0;
|
|
}
|
|
#ifdef SCTP_DEBUG
|
|
printf("sctp_sosend: after copying in\n");
|
|
#endif
|
|
if (net->flight_size > net->cwnd) {
|
|
sctp_pegs[SCTP_SENDTO_FULL_CWND]++;
|
|
queue_only = 1;
|
|
|
|
} else if (asoc->ifp_had_enobuf) {
|
|
sctp_pegs[SCTP_QUEONLY_BURSTLMT]++;
|
|
queue_only = 1;
|
|
} else {
|
|
un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
|
|
((stcb->asoc.chunks_on_out_queue - stcb->asoc.total_flight_count) * sizeof(struct sctp_data_chunk)) +
|
|
SCTP_MED_OVERHEAD);
|
|
|
|
if (((inp->sctp_flags & SCTP_PCB_FLAGS_NODELAY) == 0) &&
|
|
(stcb->asoc.total_flight > 0) &&
|
|
(un_sent < (int)stcb->asoc.smallest_mtu)) {
|
|
|
|
/* Ok, Nagle is set on and we have data outstanding. Don't
|
|
* send anything and let SACKs drive out the data unless we
|
|
* have a "full" segment to send.
|
|
*/
|
|
sctp_pegs[SCTP_NAGLE_NOQ]++;
|
|
queue_only = 1;
|
|
} else {
|
|
sctp_pegs[SCTP_NAGLE_OFF]++;
|
|
}
|
|
}
|
|
if (queue_only_for_init) {
|
|
/* It is possible to have a turn around of the
|
|
* INIT/INIT-ACK/COOKIE before I have a chance to
|
|
* copy in the data. In such a case I DO want to
|
|
* send it out by reversing the queue only flag.
|
|
*/
|
|
if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) ||
|
|
(SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_ECHOED)) {
|
|
/* yep, reverse it */
|
|
queue_only = 0;
|
|
}
|
|
}
|
|
|
|
#ifdef SCTP_DEBUG
|
|
printf("sctp_sosend: before sending chunk\n");
|
|
#endif
|
|
if ((queue_only == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
|
|
/* we can attempt to send too.*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("USR Send calls sctp_chunk_output\n");
|
|
}
|
|
#endif
|
|
solock(so);
|
|
sctp_pegs[SCTP_OUTPUT_FRM_SND]++;
|
|
sctp_chunk_output(inp, stcb, 0);
|
|
sounlock(so);
|
|
} else if ((queue_only == 0) &&
|
|
(stcb->asoc.peers_rwnd == 0) &&
|
|
(stcb->asoc.total_flight == 0)) {
|
|
/* We get to have a probe outstanding */
|
|
solock(so);
|
|
sctp_from_user_send = 1;
|
|
sctp_chunk_output(inp, stcb, 0);
|
|
sctp_from_user_send = 0;
|
|
sounlock(so);
|
|
|
|
} else if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
|
|
int num_out, reason, cwnd_full;
|
|
/* Here we do control only */
|
|
solock(so);
|
|
sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
|
|
&reason, 1, &cwnd_full, 1, &now, &now_filled);
|
|
sounlock(so);
|
|
}
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) {
|
|
printf("USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d \n",
|
|
queue_only, stcb->asoc.peers_rwnd, un_sent,
|
|
stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
|
|
stcb->asoc.total_output_queue_size);
|
|
}
|
|
#endif
|
|
out:
|
|
if (create_lock_applied) {
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
create_lock_applied = 0;
|
|
}
|
|
if (stcb) {
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
}
|
|
if (top)
|
|
sctp_m_freem(top);
|
|
if (control)
|
|
sctp_m_freem(control);
|
|
return (error);
|
|
}
|