278 lines
6.3 KiB
C
278 lines
6.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1980, 1986, 1993
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* The Regents of the University of California.
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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 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/priv.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/if.h>
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#include <net/vnet.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(void)
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{
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LIST_INIT(&V_rawcb_list);
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}
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/*
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* Raw protocol input routine. Find the socket associated with the packet(s)
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* and move them over. If 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, struct sockproto *proto, struct sockaddr *src)
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{
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return (raw_input_ext(m0, proto, src, NULL));
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}
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void
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raw_input_ext(struct mbuf *m0, struct sockproto *proto, struct sockaddr *src,
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raw_input_cb_fn cb)
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{
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struct rawcb *rp;
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struct mbuf *m = m0;
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struct socket *last;
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last = NULL;
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mtx_lock(&rawcb_mtx);
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LIST_FOREACH(rp, &V_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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if (cb != NULL && (*cb)(m, proto, src, rp) != 0)
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continue;
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if (last) {
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struct mbuf *n;
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n = m_copym(m, 0, M_COPYALL, M_NOWAIT);
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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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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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} 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(int cmd, struct sockaddr *arg, 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 void
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raw_uabort(struct socket *so)
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{
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KASSERT(sotorawcb(so) != NULL, ("raw_uabort: rp == NULL"));
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soisdisconnected(so);
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}
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static void
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raw_uclose(struct socket *so)
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{
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KASSERT(sotorawcb(so) != NULL, ("raw_uabort: rp == NULL"));
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soisdisconnected(so);
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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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int error;
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/*
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* Implementors of raw sockets will already have allocated the PCB,
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* so it must be non-NULL here.
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*/
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KASSERT(sotorawcb(so) != NULL, ("raw_uattach: so_pcb == NULL"));
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if (td != NULL) {
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error = priv_check(td, PRIV_NET_RAW);
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if (error)
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return (error);
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}
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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 void
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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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KASSERT(rp != NULL, ("raw_udetach: rp == NULL"));
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raw_detach(rp);
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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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KASSERT(sotorawcb(so) != NULL, ("raw_udisconnect: rp == NULL"));
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return (ENOTCONN);
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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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KASSERT(sotorawcb(so) != NULL, ("raw_upeeraddr: rp == NULL"));
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return (ENOTCONN);
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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, struct sockaddr *nam,
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struct mbuf *control, struct thread *td)
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{
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KASSERT(sotorawcb(so) != NULL, ("raw_usend: rp == NULL"));
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if ((flags & PRUS_OOB) || (control && control->m_len)) {
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if (m != NULL)
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m_freem(m);
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if (control != NULL)
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m_freem(control);
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return (EOPNOTSUPP);
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}
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/*
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* For historical (bad?) reasons, we effectively ignore the address
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* argument to sendto(2). Perhaps we should return an error instead?
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*/
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return ((*so->so_proto->pr_output)(m, so));
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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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KASSERT(sotorawcb(so) != NULL, ("raw_ushutdown: rp == NULL"));
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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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KASSERT(sotorawcb(so) != NULL, ("raw_usockaddr: rp == NULL"));
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return (EINVAL);
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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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.pru_close = raw_uclose,
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};
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