316 lines
7.0 KiB
C
316 lines
7.0 KiB
C
/* $NetBSD: raw_usrreq.c,v 1.33 2007/05/06 06:21:26 dyoung Exp $ */
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/*
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* Copyright (c) 1980, 1986, 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. 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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* @(#)raw_usrreq.c 8.1 (Berkeley) 6/10/93
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: raw_usrreq.c,v 1.33 2007/05/06 06:21:26 dyoung Exp $");
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#include <sys/param.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/errno.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/kauth.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <net/netisr.h>
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#include <net/raw_cb.h>
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#include <machine/stdarg.h>
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/*
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* Initialize raw connection block q.
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*/
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void
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raw_init(void)
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{
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LIST_INIT(&rawcb);
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}
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static inline int
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equal(const struct sockaddr *a1, const struct sockaddr *a2)
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{
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return memcmp(a1, a2, a1->sa_len) == 0;
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}
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/*
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* Raw protocol input routine. Find the socket
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* associated with the packet(s) and move them over. If
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* nothing exists for this packet, drop it.
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*/
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/*
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* Raw protocol interface.
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*/
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void
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raw_input(struct mbuf *m0, ...)
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{
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struct rawcb *rp;
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struct mbuf *m = m0;
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int sockets = 0;
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struct socket *last;
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va_list ap;
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struct sockproto *proto;
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struct sockaddr *src, *dst;
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va_start(ap, m0);
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proto = va_arg(ap, struct sockproto *);
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src = va_arg(ap, struct sockaddr *);
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dst = va_arg(ap, struct sockaddr *);
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va_end(ap);
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last = NULL;
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LIST_FOREACH(rp, &rawcb, rcb_list) {
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if (rp->rcb_proto.sp_family != proto->sp_family)
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continue;
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if (rp->rcb_proto.sp_protocol &&
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rp->rcb_proto.sp_protocol != proto->sp_protocol)
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continue;
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/*
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* We assume the lower level routines have
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* placed the address in a canonical format
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* suitable for a structure comparison.
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*
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* Note that if the lengths are not the same
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* the comparison will fail at the first byte.
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*/
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if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst))
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continue;
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if (rp->rcb_faddr && !equal(rp->rcb_faddr, src))
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continue;
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if (last != NULL) {
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struct mbuf *n;
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if ((n = m_copy(m, 0, M_COPYALL)) == NULL)
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;
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else if (sbappendaddr(&last->so_rcv, src, n, NULL) == 0)
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/* should notify about lost packet */
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m_freem(n);
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else {
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sorwakeup(last);
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sockets++;
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}
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}
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last = rp->rcb_socket;
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}
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if (last == NULL || sbappendaddr(&last->so_rcv, src, m, NULL) == 0)
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m_freem(m);
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else {
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sorwakeup(last);
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sockets++;
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}
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}
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/*ARGSUSED*/
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void *
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raw_ctlinput(int cmd, const struct sockaddr *arg, void *d)
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{
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if ((unsigned)cmd >= PRC_NCMDS)
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return NULL;
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return NULL;
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/* INCOMPLETE */
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}
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void
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raw_setsockaddr(struct rawcb *rp, struct mbuf *nam)
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{
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nam->m_len = rp->rcb_laddr->sa_len;
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memcpy(mtod(nam, void *), rp->rcb_laddr, (size_t)nam->m_len);
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}
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void
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raw_setpeeraddr(struct rawcb *rp, struct mbuf *nam)
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{
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nam->m_len = rp->rcb_faddr->sa_len;
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memcpy(mtod(nam, void *), rp->rcb_faddr, (size_t)nam->m_len);
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}
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/*ARGSUSED*/
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int
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raw_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam,
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struct mbuf *control, struct lwp *l)
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{
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struct rawcb *rp;
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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 (EOPNOTSUPP);
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s = splsoftnet();
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rp = sotorawcb(so);
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#ifdef DIAGNOSTIC
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if (req != PRU_SEND && req != PRU_SENDOOB && control)
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panic("raw_usrreq: unexpected control mbuf");
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#endif
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if (rp == NULL && 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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/*
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* Allocate a raw control block and fill in the
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* necessary info to allow packets to be routed to
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* the appropriate raw interface routine.
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*/
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case PRU_ATTACH:
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if (l == NULL)
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break;
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/* XXX: raw socket permissions are checked in socreate() */
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error = raw_attach(so, (int)(long)nam);
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break;
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/*
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* Destroy state just before socket deallocation.
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* Flush data or not depending on the options.
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*/
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case PRU_DETACH:
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raw_detach(rp);
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break;
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/*
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* If a socket isn't bound to a single address,
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* the raw input routine will hand it anything
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* within that protocol family (assuming there's
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* nothing else around it should go to).
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*/
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case PRU_BIND:
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case PRU_LISTEN:
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case PRU_CONNECT:
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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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raw_disconnect(rp);
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break;
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/*
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* Mark the connection as being incapable of further input.
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*/
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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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/*
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* Ship a packet out. The appropriate raw output
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* routine handles any massaging necessary.
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*/
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case PRU_SEND:
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if (control && control->m_len) {
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m_freem(control);
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m_freem(m);
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error = EINVAL;
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break;
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}
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if (nam) {
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if ((so->so_state & SS_ISCONNECTED) != 0) {
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error = EISCONN;
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goto die;
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}
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error = (*so->so_proto->pr_usrreq)(so, PRU_CONNECT,
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NULL, nam, NULL, l);
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if (error) {
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die:
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m_freem(m);
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break;
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}
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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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goto die;
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}
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}
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error = (*so->so_proto->pr_output)(m, so);
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if (nam)
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raw_disconnect(rp);
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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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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(control);
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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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if (rp->rcb_laddr == NULL) {
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error = EINVAL;
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break;
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}
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raw_setsockaddr(rp, nam);
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break;
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case PRU_PEERADDR:
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if (rp->rcb_faddr == NULL) {
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error = ENOTCONN;
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break;
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}
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raw_setpeeraddr(rp, nam);
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break;
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default:
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panic("raw_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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