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311 lines
6.6 KiB
C
311 lines
6.6 KiB
C
/*-
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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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* 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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* @(#)raw_usrreq.c 8.1 (Berkeley) 6/10/93
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/mutex.h>
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#include <sys/protosw.h>
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#include <sys/signalvar.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sx.h>
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#include <sys/systm.h>
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#include <net/raw_cb.h>
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MTX_SYSINIT(rawcb_mtx, &rawcb_mtx, "rawcb", MTX_DEF);
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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()
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{
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LIST_INIT(&rawcb_list);
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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(m0, proto, src, dst)
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struct mbuf *m0;
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register struct sockproto *proto;
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struct sockaddr *src, *dst;
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{
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register struct rawcb *rp;
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register struct mbuf *m = m0;
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struct socket *last;
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last = 0;
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mtx_lock(&rawcb_mtx);
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LIST_FOREACH(rp, &rawcb_list, 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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#define equal(a1, a2) \
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(bcmp((caddr_t)(a1), (caddr_t)(a2), a1->sa_len) == 0)
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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) {
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struct mbuf *n;
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n = m_copy(m, 0, (int)M_COPYALL);
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if (n) {
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if (sbappendaddr(&last->so_rcv, src,
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n, (struct mbuf *)0) == 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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}
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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) {
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if (sbappendaddr(&last->so_rcv, src,
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m, (struct mbuf *)0) == 0)
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m_freem(m);
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else {
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sorwakeup(last);
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}
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} else
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m_freem(m);
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mtx_unlock(&rawcb_mtx);
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}
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/*ARGSUSED*/
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void
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raw_ctlinput(cmd, arg, dummy)
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int cmd;
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struct sockaddr *arg;
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void *dummy;
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{
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if (cmd < 0 || cmd >= PRC_NCMDS)
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return;
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/* INCOMPLETE */
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}
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static int
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raw_uabort(struct socket *so)
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{
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struct rawcb *rp = sotorawcb(so);
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if (rp == 0)
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return EINVAL;
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raw_disconnect(rp);
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soisdisconnected(so);
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ACCEPT_LOCK();
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SOCK_LOCK(so);
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sotryfree(so);
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return 0;
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}
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/* pru_accept is EOPNOTSUPP */
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static int
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raw_uattach(struct socket *so, int proto, struct thread *td)
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{
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struct rawcb *rp = sotorawcb(so);
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int error;
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if (rp == 0)
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return EINVAL;
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if (td && (error = suser(td)) != 0)
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return error;
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return raw_attach(so, proto);
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}
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static int
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raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td)
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{
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return EINVAL;
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}
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static int
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raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td)
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{
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return EINVAL;
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}
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/* pru_connect2 is EOPNOTSUPP */
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/* pru_control is EOPNOTSUPP */
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static int
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raw_udetach(struct socket *so)
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{
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struct rawcb *rp = sotorawcb(so);
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if (rp == 0)
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return EINVAL;
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raw_detach(rp);
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return 0;
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}
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static int
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raw_udisconnect(struct socket *so)
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{
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struct rawcb *rp = sotorawcb(so);
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if (rp == 0)
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return EINVAL;
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if (rp->rcb_faddr == 0) {
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return ENOTCONN;
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}
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raw_disconnect(rp);
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soisdisconnected(so);
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return 0;
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}
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/* pru_listen is EOPNOTSUPP */
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static int
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raw_upeeraddr(struct socket *so, struct sockaddr **nam)
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{
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struct rawcb *rp = sotorawcb(so);
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if (rp == 0)
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return EINVAL;
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if (rp->rcb_faddr == 0) {
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return ENOTCONN;
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}
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*nam = sodupsockaddr(rp->rcb_faddr, M_WAITOK);
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return 0;
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}
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/* pru_rcvd is EOPNOTSUPP */
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/* pru_rcvoob is EOPNOTSUPP */
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static int
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raw_usend(struct socket *so, int flags, struct mbuf *m,
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struct sockaddr *nam, struct mbuf *control, struct thread *td)
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{
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int error;
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struct rawcb *rp = sotorawcb(so);
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if (rp == 0) {
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error = EINVAL;
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goto release;
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}
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if (flags & PRUS_OOB) {
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error = EOPNOTSUPP;
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goto release;
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}
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if (control && control->m_len) {
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error = EOPNOTSUPP;
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goto release;
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}
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if (nam) {
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if (rp->rcb_faddr) {
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error = EISCONN;
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goto release;
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}
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rp->rcb_faddr = nam;
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} else if (rp->rcb_faddr == 0) {
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error = ENOTCONN;
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goto release;
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}
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error = (*so->so_proto->pr_output)(m, so);
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m = NULL;
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if (nam)
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rp->rcb_faddr = 0;
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release:
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if (m != NULL)
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m_freem(m);
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return (error);
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}
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/* pru_sense is null */
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static int
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raw_ushutdown(struct socket *so)
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{
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struct rawcb *rp = sotorawcb(so);
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if (rp == 0)
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return EINVAL;
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socantsendmore(so);
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return 0;
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}
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static int
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raw_usockaddr(struct socket *so, struct sockaddr **nam)
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{
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struct rawcb *rp = sotorawcb(so);
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if (rp == 0)
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return EINVAL;
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if (rp->rcb_laddr == 0)
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return EINVAL;
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*nam = sodupsockaddr(rp->rcb_laddr, M_WAITOK);
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return 0;
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}
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struct pr_usrreqs raw_usrreqs = {
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.pru_abort = raw_uabort,
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.pru_attach = raw_uattach,
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.pru_bind = raw_ubind,
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.pru_connect = raw_uconnect,
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.pru_detach = raw_udetach,
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.pru_disconnect = raw_udisconnect,
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.pru_peeraddr = raw_upeeraddr,
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.pru_send = raw_usend,
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.pru_shutdown = raw_ushutdown,
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.pru_sockaddr = raw_usockaddr,
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};
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