384 lines
9.7 KiB
C
384 lines
9.7 KiB
C
/*
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* Copyright (c) 2000-2012 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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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. 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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* @(#)raw_usrreq.c 8.1 (Berkeley) 6/10/93
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* $FreeBSD: src/sys/net/raw_usrreq.c,v 1.18 1999/08/28 00:48:28 peter Exp $
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/proc.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 <kern/locks.h>
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#include <net/raw_cb.h>
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static LCK_GRP_DECLARE(raw_mtx_grp, "rawcb");
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LCK_MTX_DECLARE(raw_mtx, &raw_mtx_grp); /*### global raw cb mutex for now */
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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, struct sockproto *proto, struct sockaddr *src,
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struct sockaddr *dst)
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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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int error;
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//####LD raw_input is called from many places, input & output path. We have to assume the
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//####LD socket we'll find and need to append to is unlocked.
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//####LD calls from the output (locked) path need to make sure the socket is not locked when
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//####LD we call in raw_input
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last = NULL;
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lck_mtx_lock(&raw_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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}
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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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/*
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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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}
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if (rp->rcb_faddr && !equal(rp->rcb_faddr, src)) {
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continue;
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}
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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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socket_lock(last, 1);
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if (sbappendaddr(&last->so_rcv, src,
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n, (struct mbuf *)0, &error) != 0) {
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sorwakeup(last);
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sockets++;
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}
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socket_unlock(last, 1);
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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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socket_lock(last, 1);
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if (sbappendaddr(&last->so_rcv, src,
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m, (struct mbuf *)0, &error) != 0) {
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sorwakeup(last);
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sockets++;
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}
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socket_unlock(last, 1);
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} else {
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m_freem(m);
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}
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lck_mtx_unlock(&raw_mtx);
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}
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/*ARGSUSED*/
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void
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raw_ctlinput(int cmd, __unused struct sockaddr *arg, __unused void *dummy,
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__unused struct ifnet *ifp)
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{
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if (cmd < 0 || cmd >= PRC_NCMDS) {
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return;
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}
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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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lck_mtx_t * mutex_held;
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if (so->so_proto->pr_getlock != NULL) {
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mutex_held = (*so->so_proto->pr_getlock)(so, 0);
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} else {
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mutex_held = so->so_proto->pr_domain->dom_mtx;
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}
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LCK_MTX_ASSERT(mutex_held, LCK_MTX_ASSERT_OWNED);
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if (rp == 0) {
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return EINVAL;
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}
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raw_disconnect(rp);
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sofree(so);
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soisdisconnected(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, __unused struct proc *p)
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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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}
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if ((so->so_state & SS_PRIV) == 0) {
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return EPERM;
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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(__unused struct socket *so, __unused struct sockaddr *nam, __unused struct proc *p)
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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(__unused struct socket *so, __unused struct sockaddr *nam, __unused struct proc *p)
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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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lck_mtx_t * mutex_held;
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if (so->so_proto->pr_getlock != NULL) {
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mutex_held = (*so->so_proto->pr_getlock)(so, 0);
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} else {
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mutex_held = so->so_proto->pr_domain->dom_mtx;
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}
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LCK_MTX_ASSERT(mutex_held, LCK_MTX_ASSERT_OWNED);
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if (rp == 0) {
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return EINVAL;
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}
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raw_detach_nofree(rp);
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kfree_type(struct rawcb, 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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}
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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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}
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if (rp->rcb_faddr == 0) {
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return ENOTCONN;
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}
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*nam = dup_sockaddr(rp->rcb_faddr, 1);
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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, __unused struct proc *p)
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{
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int error;
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struct rawcb *rp = sotorawcb(so);
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lck_mtx_t * mutex_held;
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if (so->so_proto->pr_getlock != NULL) {
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mutex_held = (*so->so_proto->pr_getlock)(so, 0);
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} else {
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mutex_held = so->so_proto->pr_domain->dom_mtx;
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}
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LCK_MTX_ASSERT(mutex_held, LCK_MTX_ASSERT_OWNED);
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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 (so->so_proto->pr_output == NULL) {
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error = EOPNOTSUPP;
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goto release;
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}
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if (control != NULL) {
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m_freem(control);
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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 = NULL;
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}
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release:
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if (m != NULL) {
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m_freem(m);
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}
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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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lck_mtx_t * mutex_held;
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if (so->so_proto->pr_getlock != NULL) {
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mutex_held = (*so->so_proto->pr_getlock)(so, 0);
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} else {
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mutex_held = so->so_proto->pr_domain->dom_mtx;
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}
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LCK_MTX_ASSERT(mutex_held, LCK_MTX_ASSERT_OWNED);
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if (rp == 0) {
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return EINVAL;
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}
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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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}
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if (rp->rcb_laddr == 0) {
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return EINVAL;
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}
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*nam = dup_sockaddr(rp->rcb_laddr, 1);
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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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.pru_sosend = sosend,
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.pru_soreceive = soreceive,
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};
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