in_proto.c revision 315514
1/*- 2 * Copyright (c) 1982, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)in_proto.c 8.2 (Berkeley) 2/9/95 30 */ 31 32#include <sys/cdefs.h> 33__FBSDID("$FreeBSD: stable/11/sys/netinet/in_proto.c 315514 2017-03-18 22:04:20Z ae $"); 34 35#include "opt_mrouting.h" 36#include "opt_ipsec.h" 37#include "opt_inet.h" 38#include "opt_inet6.h" 39#include "opt_sctp.h" 40#include "opt_mpath.h" 41 42#include <sys/param.h> 43#include <sys/systm.h> 44#include <sys/kernel.h> 45#include <sys/malloc.h> 46#include <sys/socket.h> 47#include <sys/domain.h> 48#include <sys/proc.h> 49#include <sys/protosw.h> 50#include <sys/queue.h> 51#include <sys/sysctl.h> 52 53/* 54 * While this file provides the domain and protocol switch tables for IPv4, it 55 * also provides the sysctl node declarations for net.inet.* often shared with 56 * IPv6 for common features or by upper layer protocols. In case of no IPv4 57 * support compile out everything but these sysctl nodes. 58 */ 59#ifdef INET 60#include <net/if.h> 61#include <net/if_var.h> 62#include <net/route.h> 63#ifdef RADIX_MPATH 64#include <net/radix_mpath.h> 65#endif 66#include <net/vnet.h> 67#endif /* INET */ 68 69#if defined(INET) || defined(INET6) 70#include <netinet/in.h> 71#endif 72 73#ifdef INET 74#include <netinet/in_systm.h> 75#include <netinet/in_var.h> 76#include <netinet/ip.h> 77#include <netinet/ip_var.h> 78#include <netinet/ip_icmp.h> 79#include <netinet/igmp_var.h> 80#include <netinet/tcp.h> 81#include <netinet/tcp_timer.h> 82#include <netinet/tcp_var.h> 83#include <netinet/udp.h> 84#include <netinet/udp_var.h> 85#include <netinet/ip_encap.h> 86 87/* 88 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 89 */ 90 91static struct pr_usrreqs nousrreqs; 92 93#ifdef SCTP 94#include <netinet/in_pcb.h> 95#include <netinet/sctp_pcb.h> 96#include <netinet/sctp.h> 97#include <netinet/sctp_var.h> 98#endif /* SCTP */ 99 100FEATURE(inet, "Internet Protocol version 4"); 101 102extern struct domain inetdomain; 103 104/* Spacer for loadable protocols. */ 105#define IPPROTOSPACER \ 106{ \ 107 .pr_domain = &inetdomain, \ 108 .pr_protocol = PROTO_SPACER, \ 109 .pr_usrreqs = &nousrreqs \ 110} 111 112struct protosw inetsw[] = { 113{ 114 .pr_type = 0, 115 .pr_domain = &inetdomain, 116 .pr_protocol = IPPROTO_IP, 117 .pr_init = ip_init, 118 .pr_slowtimo = ip_slowtimo, 119 .pr_drain = ip_drain, 120 .pr_usrreqs = &nousrreqs 121}, 122{ 123 .pr_type = SOCK_DGRAM, 124 .pr_domain = &inetdomain, 125 .pr_protocol = IPPROTO_UDP, 126 .pr_flags = PR_ATOMIC|PR_ADDR, 127 .pr_input = udp_input, 128 .pr_ctlinput = udp_ctlinput, 129 .pr_ctloutput = udp_ctloutput, 130 .pr_init = udp_init, 131 .pr_usrreqs = &udp_usrreqs 132}, 133{ 134 .pr_type = SOCK_STREAM, 135 .pr_domain = &inetdomain, 136 .pr_protocol = IPPROTO_TCP, 137 .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 138 .pr_input = tcp_input, 139 .pr_ctlinput = tcp_ctlinput, 140 .pr_ctloutput = tcp_ctloutput, 141 .pr_init = tcp_init, 142 .pr_slowtimo = tcp_slowtimo, 143 .pr_drain = tcp_drain, 144 .pr_usrreqs = &tcp_usrreqs 145}, 146#ifdef SCTP 147{ 148 .pr_type = SOCK_SEQPACKET, 149 .pr_domain = &inetdomain, 150 .pr_protocol = IPPROTO_SCTP, 151 .pr_flags = PR_WANTRCVD|PR_LASTHDR, 152 .pr_input = sctp_input, 153 .pr_ctlinput = sctp_ctlinput, 154 .pr_ctloutput = sctp_ctloutput, 155 .pr_init = sctp_init, 156 .pr_drain = sctp_drain, 157 .pr_usrreqs = &sctp_usrreqs 158}, 159{ 160 .pr_type = SOCK_STREAM, 161 .pr_domain = &inetdomain, 162 .pr_protocol = IPPROTO_SCTP, 163 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LASTHDR, 164 .pr_input = sctp_input, 165 .pr_ctlinput = sctp_ctlinput, 166 .pr_ctloutput = sctp_ctloutput, 167 .pr_drain = sctp_drain, 168 .pr_usrreqs = &sctp_usrreqs 169}, 170#endif /* SCTP */ 171{ 172 .pr_type = SOCK_DGRAM, 173 .pr_domain = &inetdomain, 174 .pr_protocol = IPPROTO_UDPLITE, 175 .pr_flags = PR_ATOMIC|PR_ADDR, 176 .pr_input = udp_input, 177 .pr_ctlinput = udplite_ctlinput, 178 .pr_ctloutput = udp_ctloutput, 179 .pr_init = udplite_init, 180 .pr_usrreqs = &udp_usrreqs 181}, 182{ 183 .pr_type = SOCK_RAW, 184 .pr_domain = &inetdomain, 185 .pr_protocol = IPPROTO_RAW, 186 .pr_flags = PR_ATOMIC|PR_ADDR, 187 .pr_input = rip_input, 188 .pr_ctlinput = rip_ctlinput, 189 .pr_ctloutput = rip_ctloutput, 190 .pr_usrreqs = &rip_usrreqs 191}, 192{ 193 .pr_type = SOCK_RAW, 194 .pr_domain = &inetdomain, 195 .pr_protocol = IPPROTO_ICMP, 196 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 197 .pr_input = icmp_input, 198 .pr_ctloutput = rip_ctloutput, 199 .pr_usrreqs = &rip_usrreqs 200}, 201{ 202 .pr_type = SOCK_RAW, 203 .pr_domain = &inetdomain, 204 .pr_protocol = IPPROTO_IGMP, 205 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 206 .pr_input = igmp_input, 207 .pr_ctloutput = rip_ctloutput, 208 .pr_fasttimo = igmp_fasttimo, 209 .pr_slowtimo = igmp_slowtimo, 210 .pr_usrreqs = &rip_usrreqs 211}, 212{ 213 .pr_type = SOCK_RAW, 214 .pr_domain = &inetdomain, 215 .pr_protocol = IPPROTO_RSVP, 216 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 217 .pr_input = rsvp_input, 218 .pr_ctloutput = rip_ctloutput, 219 .pr_usrreqs = &rip_usrreqs 220}, 221{ 222 .pr_type = SOCK_RAW, 223 .pr_domain = &inetdomain, 224 .pr_protocol = IPPROTO_IPV4, 225 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 226 .pr_input = encap4_input, 227 .pr_ctloutput = rip_ctloutput, 228 .pr_init = encap_init, 229 .pr_usrreqs = &rip_usrreqs 230}, 231{ 232 .pr_type = SOCK_RAW, 233 .pr_domain = &inetdomain, 234 .pr_protocol = IPPROTO_MOBILE, 235 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 236 .pr_input = encap4_input, 237 .pr_ctloutput = rip_ctloutput, 238 .pr_init = encap_init, 239 .pr_usrreqs = &rip_usrreqs 240}, 241{ 242 .pr_type = SOCK_RAW, 243 .pr_domain = &inetdomain, 244 .pr_protocol = IPPROTO_ETHERIP, 245 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 246 .pr_input = encap4_input, 247 .pr_ctloutput = rip_ctloutput, 248 .pr_init = encap_init, 249 .pr_usrreqs = &rip_usrreqs 250}, 251{ 252 .pr_type = SOCK_RAW, 253 .pr_domain = &inetdomain, 254 .pr_protocol = IPPROTO_GRE, 255 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 256 .pr_input = encap4_input, 257 .pr_ctloutput = rip_ctloutput, 258 .pr_init = encap_init, 259 .pr_usrreqs = &rip_usrreqs 260}, 261# ifdef INET6 262{ 263 .pr_type = SOCK_RAW, 264 .pr_domain = &inetdomain, 265 .pr_protocol = IPPROTO_IPV6, 266 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 267 .pr_input = encap4_input, 268 .pr_ctloutput = rip_ctloutput, 269 .pr_init = encap_init, 270 .pr_usrreqs = &rip_usrreqs 271}, 272#endif 273{ 274 .pr_type = SOCK_RAW, 275 .pr_domain = &inetdomain, 276 .pr_protocol = IPPROTO_PIM, 277 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 278 .pr_input = encap4_input, 279 .pr_ctloutput = rip_ctloutput, 280 .pr_usrreqs = &rip_usrreqs 281}, 282/* Spacer n-times for loadable protocols. */ 283IPPROTOSPACER, 284IPPROTOSPACER, 285IPPROTOSPACER, 286IPPROTOSPACER, 287IPPROTOSPACER, 288IPPROTOSPACER, 289IPPROTOSPACER, 290IPPROTOSPACER, 291/* raw wildcard */ 292{ 293 .pr_type = SOCK_RAW, 294 .pr_domain = &inetdomain, 295 .pr_flags = PR_ATOMIC|PR_ADDR, 296 .pr_input = rip_input, 297 .pr_ctloutput = rip_ctloutput, 298 .pr_init = rip_init, 299 .pr_usrreqs = &rip_usrreqs 300}, 301}; 302 303extern int in_inithead(void **, int); 304extern int in_detachhead(void **, int); 305 306struct domain inetdomain = { 307 .dom_family = AF_INET, 308 .dom_name = "internet", 309 .dom_protosw = inetsw, 310 .dom_protoswNPROTOSW = &inetsw[nitems(inetsw)], 311#ifdef RADIX_MPATH 312 .dom_rtattach = rn4_mpath_inithead, 313#else 314 .dom_rtattach = in_inithead, 315#endif 316#ifdef VIMAGE 317 .dom_rtdetach = in_detachhead, 318#endif 319 .dom_ifattach = in_domifattach, 320 .dom_ifdetach = in_domifdetach 321}; 322 323VNET_DOMAIN_SET(inet); 324#endif /* INET */ 325 326SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 327 "Internet Family"); 328 329SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 330SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 331SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 332SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 333#ifdef SCTP 334SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW, 0, "SCTP"); 335#endif 336SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 337#if defined(IPSEC) || defined(IPSEC_SUPPORT) 338/* XXX no protocol # to use, pick something "reserved" */ 339SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 340SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 341SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 342SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 343SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 344#endif /* IPSEC */ 345SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 346SYSCTL_NODE(_net_inet, OID_AUTO, accf, CTLFLAG_RW, 0, 347 "Accept filters"); 348