362 lines
12 KiB
C
362 lines
12 KiB
C
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/*
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* Copyright (c) 2000-2019 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) 1982, 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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* @(#)in_proto.c 8.2 (Berkeley) 2/9/95
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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/socket.h>
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#include <sys/domain.h>
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#include <sys/protosw.h>
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#include <sys/queue.h>
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#include <sys/sysctl.h>
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#include <sys/mbuf.h>
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#include <kern/debug.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <net/kpi_protocol.h>
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/ip_var.h>
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#include <netinet/ip_icmp.h>
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#include <netinet/igmp_var.h>
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#include <netinet/tcp.h>
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#include <netinet/tcp_timer.h>
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#include <netinet/tcp_var.h>
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#include <netinet/tcpip.h>
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#include <netinet/udp.h>
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#include <netinet/udp_var.h>
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#include <netinet/ip_encap.h>
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/*
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* TCP/IP protocol family: IP, ICMP, UDP, TCP.
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*/
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#if IPSEC
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#include <netinet6/ipsec.h>
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#include <netinet6/ah.h>
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#if IPSEC_ESP
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#include <netinet6/esp.h>
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#endif
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#endif /* IPSEC */
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static void in_dinit(struct domain *);
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static void ip_proto_input(protocol_family_t, mbuf_t);
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extern struct domain inetdomain_s;
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static struct pr_usrreqs nousrreqs;
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extern struct pr_usrreqs icmp_dgram_usrreqs;
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extern int icmp_dgram_ctloutput(struct socket *, struct sockopt *);
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struct domain *inetdomain = NULL;
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/* Thanks to PPP, this still needs to be exported */
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lck_mtx_t *inet_domain_mutex;
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static struct protosw inetsw[] = {
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{
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.pr_type = 0,
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.pr_protocol = 0,
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.pr_init = ip_init,
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.pr_drain = ip_drain,
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.pr_usrreqs = &nousrreqs,
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},
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{
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.pr_type = SOCK_DGRAM,
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.pr_protocol = IPPROTO_UDP,
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.pr_flags = PR_ATOMIC | PR_ADDR | PR_PROTOLOCK | PR_PCBLOCK |
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PR_EVCONNINFO | PR_PRECONN_WRITE,
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.pr_input = udp_input,
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.pr_ctlinput = udp_ctlinput,
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.pr_ctloutput = udp_ctloutput,
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.pr_init = udp_init,
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.pr_usrreqs = &udp_usrreqs,
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.pr_lock = udp_lock,
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.pr_unlock = udp_unlock,
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.pr_getlock = udp_getlock,
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.pr_update_last_owner = inp_update_last_owner,
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.pr_copy_last_owner = inp_copy_last_owner,
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},
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{
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.pr_type = SOCK_STREAM,
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.pr_protocol = IPPROTO_TCP,
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.pr_flags = PR_CONNREQUIRED | PR_WANTRCVD | PR_PCBLOCK |
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PR_PROTOLOCK | PR_DISPOSE | PR_EVCONNINFO |
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PR_PRECONN_WRITE | PR_DATA_IDEMPOTENT,
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.pr_input = tcp_input,
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.pr_ctlinput = tcp_ctlinput,
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.pr_ctloutput = tcp_ctloutput,
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.pr_init = tcp_init,
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.pr_drain = tcp_drain,
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.pr_usrreqs = &tcp_usrreqs,
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.pr_lock = tcp_lock,
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.pr_unlock = tcp_unlock,
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.pr_getlock = tcp_getlock,
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.pr_update_last_owner = inp_update_last_owner,
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.pr_copy_last_owner = inp_copy_last_owner,
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},
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{
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.pr_type = SOCK_RAW,
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.pr_protocol = IPPROTO_RAW,
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.pr_flags = PR_ATOMIC | PR_ADDR,
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.pr_input = rip_input,
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.pr_ctlinput = rip_ctlinput,
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.pr_ctloutput = rip_ctloutput,
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.pr_usrreqs = &rip_usrreqs,
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.pr_unlock = rip_unlock,
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.pr_update_last_owner = inp_update_last_owner,
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.pr_copy_last_owner = inp_copy_last_owner,
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},
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{
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.pr_type = SOCK_RAW,
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.pr_protocol = IPPROTO_ICMP,
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.pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR,
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.pr_input = icmp_input,
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.pr_ctloutput = rip_ctloutput,
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.pr_usrreqs = &rip_usrreqs,
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.pr_unlock = rip_unlock,
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.pr_update_last_owner = inp_update_last_owner,
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.pr_copy_last_owner = inp_copy_last_owner,
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},
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{
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.pr_type = SOCK_DGRAM,
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.pr_protocol = IPPROTO_ICMP,
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.pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR,
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.pr_input = icmp_input,
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.pr_ctloutput = icmp_dgram_ctloutput,
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.pr_usrreqs = &icmp_dgram_usrreqs,
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.pr_unlock = rip_unlock,
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.pr_update_last_owner = inp_update_last_owner,
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.pr_copy_last_owner = inp_copy_last_owner,
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},
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{
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.pr_type = SOCK_RAW,
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.pr_protocol = IPPROTO_IGMP,
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.pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR,
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.pr_input = igmp_input,
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.pr_ctloutput = rip_ctloutput,
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.pr_init = igmp_init,
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.pr_usrreqs = &rip_usrreqs,
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.pr_unlock = rip_unlock,
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.pr_update_last_owner = inp_update_last_owner,
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.pr_copy_last_owner = inp_copy_last_owner,
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},
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{
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.pr_type = SOCK_RAW,
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.pr_protocol = IPPROTO_GRE,
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.pr_flags = PR_ATOMIC | PR_ADDR,
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.pr_input = gre_input,
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.pr_ctlinput = rip_ctlinput,
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.pr_ctloutput = rip_ctloutput,
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.pr_usrreqs = &rip_usrreqs,
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.pr_unlock = rip_unlock,
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.pr_update_last_owner = inp_update_last_owner,
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.pr_copy_last_owner = inp_copy_last_owner,
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},
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#if IPSEC
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{
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.pr_type = SOCK_RAW,
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.pr_protocol = IPPROTO_AH,
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.pr_flags = PR_ATOMIC | PR_ADDR | PR_PROTOLOCK,
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.pr_input = ah4_input,
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.pr_usrreqs = &nousrreqs,
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},
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#if IPSEC_ESP
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{
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.pr_type = SOCK_RAW,
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.pr_protocol = IPPROTO_ESP,
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.pr_flags = PR_ATOMIC | PR_ADDR | PR_PROTOLOCK,
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.pr_input = esp4_input,
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.pr_usrreqs = &nousrreqs,
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},
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#endif /* IPSEC_ESP */
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#endif /* IPSEC */
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{
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.pr_type = SOCK_RAW,
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.pr_protocol = IPPROTO_IPV4,
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.pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR,
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.pr_input = encap4_input,
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.pr_ctloutput = rip_ctloutput,
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.pr_usrreqs = &rip_usrreqs,
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.pr_unlock = rip_unlock,
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.pr_update_last_owner = inp_update_last_owner,
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.pr_copy_last_owner = inp_copy_last_owner,
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},
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{
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.pr_type = SOCK_RAW,
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.pr_protocol = IPPROTO_IPV6,
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.pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR,
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.pr_input = encap4_input,
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.pr_ctloutput = rip_ctloutput,
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.pr_usrreqs = &rip_usrreqs,
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.pr_unlock = rip_unlock,
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.pr_update_last_owner = inp_update_last_owner,
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.pr_copy_last_owner = inp_copy_last_owner,
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},
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/* raw wildcard */
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{
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.pr_type = SOCK_RAW,
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.pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR,
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.pr_input = rip_input,
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.pr_ctloutput = rip_ctloutput,
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.pr_init = rip_init,
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.pr_usrreqs = &rip_usrreqs,
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.pr_unlock = rip_unlock,
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.pr_update_last_owner = inp_update_last_owner,
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.pr_copy_last_owner = inp_copy_last_owner,
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},
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};
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static int in_proto_count = (sizeof(inetsw) / sizeof(struct protosw));
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struct domain inetdomain_s = {
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.dom_family = PF_INET,
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.dom_flags = DOM_REENTRANT,
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.dom_name = "internet",
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.dom_init = in_dinit,
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.dom_rtattach = in_inithead,
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.dom_rtoffset = 32,
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.dom_maxrtkey = sizeof(struct sockaddr_in),
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.dom_protohdrlen = sizeof(struct tcpiphdr),
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};
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/* Initialize the PF_INET domain, and add in the pre-defined protos */
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void
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in_dinit(struct domain *dp)
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{
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struct protosw *pr;
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int i;
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domain_unguard_t unguard;
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VERIFY(!(dp->dom_flags & DOM_INITIALIZED));
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VERIFY(inetdomain == NULL);
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inetdomain = dp;
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/*
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* Verify that the maximum possible tcp/ip header will still
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* fit in a small mbuf because m_pullup only puls into 256
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* byte mbuf
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*/
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_CASSERT((sizeof(struct tcpiphdr) + TCP_MAXOLEN) <= _MHLEN);
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/*
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* Attach first, then initialize; ip_init() needs raw IP handler.
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*/
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for (i = 0, pr = &inetsw[0]; i < in_proto_count; i++, pr++) {
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net_add_proto(pr, dp, 0);
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}
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for (i = 0, pr = &inetsw[0]; i < in_proto_count; i++, pr++) {
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net_init_proto(pr, dp);
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}
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inet_domain_mutex = dp->dom_mtx;
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unguard = domain_unguard_deploy();
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i = proto_register_input(PF_INET, ip_proto_input, NULL, 1);
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if (i != 0) {
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panic("%s: failed to register PF_INET protocol: %d",
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__func__, i);
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/* NOTREACHED */
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}
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domain_unguard_release(unguard);
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}
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static void
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ip_proto_input(protocol_family_t protocol, mbuf_t packet_list)
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{
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#pragma unused(protocol)
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if (packet_list->m_nextpkt != NULL) {
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ip_input_process_list(packet_list);
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} else {
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/*
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* XXX remove this path if ip_input_process_list is proven
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* to be stable and has minimum overhead on most platforms.
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*/
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ip_input(packet_list);
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}
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}
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SYSCTL_NODE(_net, PF_INET, inet,
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CTLFLAG_RW | CTLFLAG_LOCKED, 0, "Internet Family");
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|
|
||
|
|
SYSCTL_NODE(_net_inet, IPPROTO_IP, ip,
|
||
|
|
CTLFLAG_RW | CTLFLAG_LOCKED, 0, "IP");
|
||
|
|
SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp,
|
||
|
|
CTLFLAG_RW | CTLFLAG_LOCKED, 0, "ICMP");
|
||
|
|
SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp,
|
||
|
|
CTLFLAG_RW | CTLFLAG_LOCKED, 0, "UDP");
|
||
|
|
SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp,
|
||
|
|
CTLFLAG_RW | CTLFLAG_LOCKED, 0, "TCP");
|
||
|
|
SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp,
|
||
|
|
CTLFLAG_RW | CTLFLAG_LOCKED, 0, "IGMP");
|
||
|
|
#if IPSEC
|
||
|
|
SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec,
|
||
|
|
CTLFLAG_RW | CTLFLAG_LOCKED, 0, "IPSEC");
|
||
|
|
#endif /* IPSEC */
|
||
|
|
SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw,
|
||
|
|
CTLFLAG_RW | CTLFLAG_LOCKED, 0, "RAW");
|