534 lines
11 KiB
C
534 lines
11 KiB
C
/* $NetBSD: idp_usrreq.c,v 1.18 2000/03/30 13:02:56 augustss Exp $ */
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/*
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* Copyright (c) 1984, 1985, 1986, 1987, 1993
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* The Regents of the University of California. 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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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* @(#)idp_usrreq.c 8.2 (Berkeley) 1/9/95
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*/
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#include "opt_ns.h" /* NSIP: Xerox NS over IP */
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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/protosw.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/errno.h>
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#include <sys/stat.h>
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#include <sys/proc.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <netns/ns.h>
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#include <netns/ns_pcb.h>
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#include <netns/ns_if.h>
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#include <netns/ns_var.h>
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#include <netns/idp.h>
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#include <netns/idp_var.h>
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#include <netns/ns_error.h>
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#include <machine/stdarg.h>
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/*
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* IDP protocol implementation.
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*/
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struct sockaddr_ns idp_ns = { sizeof(idp_ns), AF_NS };
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/*
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* This may also be called for raw listeners.
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*/
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void
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#if __STDC__
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idp_input(struct mbuf *m, ...)
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#else
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idp_input(m, va_alist)
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struct mbuf *m;
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va_dcl
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#endif
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{
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struct nspcb *nsp;
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struct idp *idp = mtod(m, struct idp *);
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struct ifnet *ifp = m->m_pkthdr.rcvif;
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va_list ap;
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va_start(ap, m);
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nsp = va_arg(ap, struct nspcb *);
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va_end(ap);
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if (nsp==0)
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panic("No nspcb");
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/*
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* Construct sockaddr format source address.
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* Stuff source address and datagram in user buffer.
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*/
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idp_ns.sns_addr = idp->idp_sna;
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if (ns_neteqnn(idp->idp_sna.x_net, ns_zeronet) && ifp) {
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struct ifaddr *ifa;
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for (ifa = ifp->if_addrlist.tqh_first; ifa != 0;
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ifa = ifa->ifa_list.tqe_next) {
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if (ifa->ifa_addr->sa_family == AF_NS) {
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idp_ns.sns_addr.x_net =
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IA_SNS(ifa)->sns_addr.x_net;
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break;
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}
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}
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}
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nsp->nsp_rpt = idp->idp_pt;
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if ( ! (nsp->nsp_flags & NSP_RAWIN) ) {
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m->m_len -= sizeof (struct idp);
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m->m_pkthdr.len -= sizeof (struct idp);
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m->m_data += sizeof (struct idp);
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}
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if (sbappendaddr(&nsp->nsp_socket->so_rcv, snstosa(&idp_ns), m,
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(struct mbuf *)0) == 0)
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goto bad;
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sorwakeup(nsp->nsp_socket);
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return;
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bad:
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m_freem(m);
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}
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void
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idp_abort(nsp)
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struct nspcb *nsp;
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{
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struct socket *so = nsp->nsp_socket;
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ns_pcbdisconnect(nsp);
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soisdisconnected(so);
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}
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/*
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* Drop connection, reporting
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* the specified error.
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*/
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void
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idp_drop(nsp, errno)
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struct nspcb *nsp;
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int errno;
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{
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struct socket *so = nsp->nsp_socket;
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#if 0
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/*
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* someday, in the xerox world
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* we will generate error protocol packets
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* announcing that the socket has gone away.
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*/
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if (TCPS_HAVERCVDSYN(tp->t_state)) {
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tp->t_state = TCPS_CLOSED;
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(void) tcp_output(tp);
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}
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#endif
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so->so_error = errno;
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ns_pcbdisconnect(nsp);
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soisdisconnected(so);
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}
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int
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#if __STDC__
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idp_output(struct mbuf *m0, ...)
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#else
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idp_output(m0, va_alist)
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struct mbuf *m0;
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va_dcl
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#endif
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{
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struct nspcb *nsp;
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struct mbuf *m;
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struct idp *idp;
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int len = m0->m_pkthdr.len;
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struct mbuf *mprev = NULL;
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extern int idpcksum;
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va_list ap;
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va_start(ap, m0);
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nsp = va_arg(ap, struct nspcb *);
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va_end(ap);
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/*
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* Make sure packet is actually of even length.
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*/
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if (len & 1) {
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m = mprev;
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if ((m->m_flags & M_EXT) == 0 &&
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(m->m_len + m->m_data < &m->m_dat[MLEN])) {
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m->m_len++;
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} else {
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struct mbuf *m1 = m_get(M_DONTWAIT, MT_DATA);
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if (m1 == 0) {
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m_freem(m0);
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return (ENOBUFS);
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}
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m1->m_len = 1;
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* mtod(m1, char *) = 0;
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m->m_next = m1;
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}
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m0->m_pkthdr.len++;
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}
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/*
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* Fill in mbuf with extended IDP header
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* and addresses and length put into network format.
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*/
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m = m0;
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if (nsp->nsp_flags & NSP_RAWOUT) {
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idp = mtod(m, struct idp *);
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} else {
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M_PREPEND(m, sizeof (struct idp), M_DONTWAIT);
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if (m == 0)
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return (ENOBUFS);
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idp = mtod(m, struct idp *);
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idp->idp_tc = 0;
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idp->idp_pt = nsp->nsp_dpt;
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idp->idp_sna = nsp->nsp_laddr;
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idp->idp_dna = nsp->nsp_faddr;
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len += sizeof (struct idp);
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}
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idp->idp_len = htons((u_int16_t)len);
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if (idpcksum) {
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idp->idp_sum = 0;
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len = ((len - 1) | 1) + 1;
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idp->idp_sum = ns_cksum(m, len);
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} else
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idp->idp_sum = 0xffff;
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/*
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* Use cached route for previous datagram if
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* possible. If the previous net was the same
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* and the interface was a broadcast medium, or
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* if the previous destination was identical,
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* then we are ok.
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*
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* NB: We don't handle broadcasts because that
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* would require 3 subroutine calls.
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*/
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return (ns_output(m, &nsp->nsp_route,
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nsp->nsp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST)));
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}
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/* ARGSUSED */
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int
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idp_ctloutput(req, so, level, name, value)
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int req, level;
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struct socket *so;
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int name;
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struct mbuf **value;
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{
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struct mbuf *m;
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struct nspcb *nsp = sotonspcb(so);
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int mask, error = 0;
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if (nsp == NULL)
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return (EINVAL);
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switch (req) {
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case PRCO_GETOPT:
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if (value==NULL)
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return (EINVAL);
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m = m_get(M_DONTWAIT, MT_DATA);
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if (m==NULL)
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return (ENOBUFS);
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switch (name) {
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case SO_ALL_PACKETS:
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mask = NSP_ALL_PACKETS;
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goto get_flags;
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case SO_HEADERS_ON_INPUT:
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mask = NSP_RAWIN;
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goto get_flags;
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case SO_HEADERS_ON_OUTPUT:
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mask = NSP_RAWOUT;
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get_flags:
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m->m_len = sizeof(short);
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*mtod(m, short *) = nsp->nsp_flags & mask;
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break;
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case SO_DEFAULT_HEADERS:
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m->m_len = sizeof(struct idp);
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{
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struct idp *idp = mtod(m, struct idp *);
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idp->idp_len = 0;
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idp->idp_sum = 0;
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idp->idp_tc = 0;
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idp->idp_pt = nsp->nsp_dpt;
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idp->idp_dna = nsp->nsp_faddr;
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idp->idp_sna = nsp->nsp_laddr;
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}
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break;
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case SO_SEQNO:
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m->m_len = sizeof(long);
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*mtod(m, long *) = ns_pexseq++;
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break;
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default:
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error = EINVAL;
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}
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*value = m;
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break;
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case PRCO_SETOPT:
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switch (name) {
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int *ok;
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case SO_ALL_PACKETS:
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mask = NSP_ALL_PACKETS;
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goto set_head;
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case SO_HEADERS_ON_INPUT:
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mask = NSP_RAWIN;
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goto set_head;
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case SO_HEADERS_ON_OUTPUT:
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mask = NSP_RAWOUT;
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set_head:
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if (value && *value) {
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ok = mtod(*value, int *);
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if (*ok)
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nsp->nsp_flags |= mask;
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else
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nsp->nsp_flags &= ~mask;
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} else error = EINVAL;
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break;
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case SO_DEFAULT_HEADERS:
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{
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struct idp *idp
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= mtod(*value, struct idp *);
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nsp->nsp_dpt = idp->idp_pt;
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}
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break;
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#ifdef NSIP
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case SO_NSIP_ROUTE:
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error = nsip_route(*value);
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break;
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#endif /* NSIP */
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default:
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error = EINVAL;
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}
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if (value && *value)
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m_freem(*value);
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break;
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}
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return (error);
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}
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u_long idp_sendspace = 2048;
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u_long idp_recvspace = 2048;
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/*ARGSUSED*/
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int
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idp_usrreq(so, req, m, nam, control, p)
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struct socket *so;
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int req;
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struct mbuf *m, *nam, *control;
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struct proc *p;
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{
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struct nspcb *nsp;
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int s;
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int error = 0;
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if (req == PRU_CONTROL)
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return (ns_control(so, (u_long)m, (caddr_t)nam,
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(struct ifnet *)control, p));
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if (req == PRU_PURGEIF) {
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ns_purgeif((struct ifnet *)control);
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return (0);
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}
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s = splsoftnet();
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nsp = sotonspcb(so);
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if (nsp == 0 && req != PRU_ATTACH) {
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error = EINVAL;
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goto release;
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}
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switch (req) {
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case PRU_ATTACH:
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if (nsp != 0) {
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error = EISCONN;
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break;
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}
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if ((error = soreserve(so, idp_sendspace, idp_recvspace)) ||
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(error = ns_pcballoc(so, &nspcb)))
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break;
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break;
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case PRU_DETACH:
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ns_pcbdetach(nsp);
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break;
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case PRU_BIND:
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error = ns_pcbbind(nsp, nam, p);
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break;
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case PRU_LISTEN:
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error = EOPNOTSUPP;
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break;
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case PRU_CONNECT:
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error = ns_pcbconnect(nsp, nam);
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if (error)
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break;
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soisconnected(so);
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break;
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case PRU_CONNECT2:
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error = EOPNOTSUPP;
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break;
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case PRU_DISCONNECT:
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soisdisconnected(so);
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ns_pcbdisconnect(nsp);
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break;
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case PRU_SHUTDOWN:
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socantsendmore(so);
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break;
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case PRU_RCVD:
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error = EOPNOTSUPP;
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break;
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case PRU_SEND:
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{
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struct ns_addr laddr;
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if (nam) {
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laddr = nsp->nsp_laddr;
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if ((so->so_state & SS_ISCONNECTED) != 0) {
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error = EISCONN;
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break;
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}
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error = ns_pcbconnect(nsp, nam);
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if (error)
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break;
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} else {
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if ((so->so_state & SS_ISCONNECTED) == 0) {
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error = ENOTCONN;
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break;
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}
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}
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error = idp_output(m, nsp);
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if (nam) {
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ns_pcbdisconnect(nsp);
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nsp->nsp_laddr = laddr;
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}
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}
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break;
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case PRU_SENSE:
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/*
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* stat: don't bother with a blocksize.
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*/
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splx(s);
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return (0);
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/*
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* Not supported.
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*/
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case PRU_RCVOOB:
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error = EOPNOTSUPP;
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break;
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case PRU_SENDOOB:
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m_freem(m);
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error = EOPNOTSUPP;
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break;
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case PRU_SOCKADDR:
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ns_setsockaddr(nsp, nam);
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break;
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case PRU_PEERADDR:
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ns_setpeeraddr(nsp, nam);
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break;
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default:
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panic("idp_usrreq");
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}
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release:
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splx(s);
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return (error);
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}
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/*ARGSUSED*/
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int
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idp_raw_usrreq(so, req, m, nam, control, p)
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struct socket *so;
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int req;
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struct mbuf *m, *nam, *control;
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struct proc *p;
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{
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int error = 0;
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struct nspcb *nsp = sotonspcb(so);
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switch (req) {
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case PRU_ATTACH:
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if (nsp != 0) {
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error = EISCONN;
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break;
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}
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if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) {
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error = EACCES;
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break;
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}
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if ((error = soreserve(so, idp_sendspace, idp_recvspace)) ||
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(error = ns_pcballoc(so, &nspcb)))
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break;
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nsp = sotonspcb(so);
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nsp->nsp_faddr.x_host = ns_broadhost;
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nsp->nsp_flags = NSP_RAWIN | NSP_RAWOUT;
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break;
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default:
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error = idp_usrreq(so, req, m, nam, control, p);
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break;
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}
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return (error);
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}
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