1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)in_proto.c 8.2 (Berkeley) 2/9/95 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include "opt_mrouting.h" 38 #include "opt_ipsec.h" 39 #include "opt_inet.h" 40 #include "opt_inet6.h" 41 #include "opt_sctp.h" 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.h> 46 #include <sys/malloc.h> 47 #include <sys/socket.h> 48 #include <sys/domain.h> 49 #include <sys/proc.h> 50 #include <sys/protosw.h> 51 #include <sys/queue.h> 52 #include <sys/sysctl.h> 53 54 /* 55 * While this file provides the domain and protocol switch tables for IPv4, it 56 * also provides the sysctl node declarations for net.inet.* often shared with 57 * IPv6 for common features or by upper layer protocols. In case of no IPv4 58 * support compile out everything but these sysctl nodes. 59 */ 60 #ifdef INET 61 #include <net/if.h> 62 #include <net/if_var.h> 63 #include <net/route.h> 64 #include <net/vnet.h> 65 #endif /* INET */ 66 67 #if defined(INET) || defined(INET6) 68 #include <netinet/in.h> 69 #endif 70 71 #ifdef INET 72 #include <netinet/in_systm.h> 73 #include <netinet/in_var.h> 74 #include <netinet/ip.h> 75 #include <netinet/ip_var.h> 76 #include <netinet/ip_icmp.h> 77 #include <netinet/igmp_var.h> 78 #include <netinet/tcp.h> 79 #include <netinet/tcp_timer.h> 80 #include <netinet/tcp_var.h> 81 #include <netinet/udp.h> 82 #include <netinet/udp_var.h> 83 #include <netinet/ip_encap.h> 84 85 /* 86 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 87 */ 88 89 #ifdef SCTP 90 #include <netinet/in_pcb.h> 91 #include <netinet/sctp_pcb.h> 92 #include <netinet/sctp.h> 93 #include <netinet/sctp_var.h> 94 #endif 95 96 /* netinet/raw_ip.c */ 97 extern struct protosw rip_protosw, rsvp_protosw, rawipv4_protosw, 98 rawipv6_protosw, mobile_protosw, etherip_protosw, icmp_protosw, 99 igmp_protosw, gre_protosw, pim_protosw, ripwild_protosw; 100 /* netinet/udp_usrreq.c */ 101 extern struct protosw udp_protosw, udplite_protosw; 102 103 FEATURE(inet, "Internet Protocol version 4"); 104 105 struct domain inetdomain = { 106 .dom_family = AF_INET, 107 .dom_name = "internet", 108 .dom_rtattach = in_inithead, 109 #ifdef VIMAGE 110 .dom_rtdetach = in_detachhead, 111 #endif 112 .dom_ifattach = in_domifattach, 113 .dom_ifdetach = in_domifdetach, 114 .dom_nprotosw = 24, 115 .dom_protosw = { 116 &tcp_protosw, 117 &udp_protosw, 118 #ifdef SCTP 119 &sctp_seqpacket_protosw, 120 &sctp_stream_protosw, 121 #else 122 NULL, NULL, 123 #endif 124 &udplite_protosw, 125 &rip_protosw, 126 /* 127 * XXXGL: it is entirely possible that all below raw-based 128 * protosw definitions are not needed. They could have existed 129 * just to define pr_input, pr_drain, pr_*timo or PR_LASTHDR 130 * flag, and were never supposed to create a special socket. 131 */ 132 &icmp_protosw, 133 &igmp_protosw, 134 &rsvp_protosw, 135 &rawipv4_protosw, 136 &mobile_protosw, 137 ðerip_protosw, 138 &gre_protosw, 139 #ifdef INET6 140 &rawipv6_protosw, 141 #else 142 NULL, 143 #endif 144 &pim_protosw, 145 /* Spacer 8 times for loadable protocols. XXXGL: why 8? */ 146 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 147 &ripwild_protosw, 148 }, 149 }; 150 151 DOMAIN_SET(inet); 152 #endif /* INET */ 153 154 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 155 "Internet Family"); 156 157 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 158 "IP"); 159 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 160 "ICMP"); 161 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 162 "UDP"); 163 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 164 "TCP"); 165 #if defined(SCTP) || defined(SCTP_SUPPORT) 166 SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 167 "SCTP"); 168 #endif 169 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 170 "IGMP"); 171 #if defined(IPSEC) || defined(IPSEC_SUPPORT) 172 /* XXX no protocol # to use, pick something "reserved" */ 173 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 174 "IPSEC"); 175 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 176 "AH"); 177 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 178 "ESP"); 179 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 180 "IPCOMP"); 181 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 182 "IPIP"); 183 #endif /* IPSEC */ 184 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 185 "RAW"); 186 SYSCTL_NODE(_net_inet, OID_AUTO, accf, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 187 "Accept filters"); 188