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 * $FreeBSD$ 31 */ 32 33 #include "opt_ipx.h" 34 #include "opt_mrouting.h" 35 #include "opt_ipsec.h" 36 #include "opt_inet6.h" 37 #include "opt_pf.h" 38 #include "opt_carp.h" 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/kernel.h> 43 #include <sys/socket.h> 44 #include <sys/domain.h> 45 #include <sys/protosw.h> 46 #include <sys/queue.h> 47 #include <sys/sysctl.h> 48 49 #include <net/if.h> 50 #include <net/route.h> 51 52 #include <netinet/in.h> 53 #include <netinet/in_systm.h> 54 #include <netinet/ip.h> 55 #include <netinet/ip_var.h> 56 #include <netinet/ip_icmp.h> 57 #include <netinet/igmp_var.h> 58 #ifdef PIM 59 #include <netinet/pim_var.h> 60 #endif 61 #include <netinet/tcp.h> 62 #include <netinet/tcp_timer.h> 63 #include <netinet/tcp_var.h> 64 #include <netinet/udp.h> 65 #include <netinet/udp_var.h> 66 #include <netinet/ip_encap.h> 67 68 /* 69 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 70 */ 71 72 static struct pr_usrreqs nousrreqs; 73 74 #ifdef IPSEC 75 #include <netinet6/ipsec.h> 76 #include <netinet6/ah.h> 77 #ifdef IPSEC_ESP 78 #include <netinet6/esp.h> 79 #endif 80 #include <netinet6/ipcomp.h> 81 #endif /* IPSEC */ 82 83 #ifdef FAST_IPSEC 84 #include <netipsec/ipsec.h> 85 #endif /* FAST_IPSEC */ 86 87 #ifdef IPXIP 88 #include <netipx/ipx_ip.h> 89 #endif 90 91 #ifdef DEV_PFSYNC 92 #include <net/pfvar.h> 93 #include <net/if_pfsync.h> 94 #endif 95 96 #ifdef DEV_CARP 97 #include <netinet/ip_carp.h> 98 #endif 99 100 extern struct domain inetdomain; 101 102 /* Spacer for loadable protocols. */ 103 #define IPPROTOSPACER \ 104 { 0, &inetdomain, PROTO_SPACER, 0, \ 105 NULL, NULL, NULL, NULL, \ 106 NULL, \ 107 NULL, NULL, NULL, NULL, \ 108 &nousrreqs \ 109 } 110 111 struct protosw inetsw[] = { 112 { 0, &inetdomain, 0, 0, 113 0, 0, 0, 0, 114 0, 115 ip_init, 0, ip_slowtimo, ip_drain, 116 &nousrreqs 117 }, 118 { SOCK_DGRAM, &inetdomain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR, 119 udp_input, 0, udp_ctlinput, ip_ctloutput, 120 0, 121 udp_init, 0, 0, 0, 122 &udp_usrreqs 123 }, 124 { SOCK_STREAM, &inetdomain, IPPROTO_TCP, 125 PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 126 tcp_input, 0, tcp_ctlinput, tcp_ctloutput, 127 0, 128 tcp_init, 0, tcp_slowtimo, tcp_drain, 129 &tcp_usrreqs 130 }, 131 { SOCK_RAW, &inetdomain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 132 rip_input, 0, rip_ctlinput, rip_ctloutput, 133 0, 134 0, 0, 0, 0, 135 &rip_usrreqs 136 }, 137 { SOCK_RAW, &inetdomain, IPPROTO_ICMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 138 icmp_input, 0, 0, rip_ctloutput, 139 0, 140 0, 0, 0, 0, 141 &rip_usrreqs 142 }, 143 { SOCK_RAW, &inetdomain, IPPROTO_IGMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 144 igmp_input, 0, 0, rip_ctloutput, 145 0, 146 igmp_init, igmp_fasttimo, igmp_slowtimo, 0, 147 &rip_usrreqs 148 }, 149 { SOCK_RAW, &inetdomain, IPPROTO_RSVP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 150 rsvp_input, 0, 0, rip_ctloutput, 151 0, 152 0, 0, 0, 0, 153 &rip_usrreqs 154 }, 155 #ifdef IPSEC 156 { SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 157 ah4_input, 0, 0, 0, 158 0, 159 0, 0, 0, 0, 160 &nousrreqs 161 }, 162 #ifdef IPSEC_ESP 163 { SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 164 esp4_input, 0, 0, 0, 165 0, 166 0, 0, 0, 0, 167 &nousrreqs 168 }, 169 #endif 170 { SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 171 ipcomp4_input, 0, 0, 0, 172 0, 173 0, 0, 0, 0, 174 &nousrreqs 175 }, 176 #endif /* IPSEC */ 177 #ifdef FAST_IPSEC 178 { SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 179 ah4_input, 0, ah4_ctlinput, 0, 180 0, 181 0, 0, 0, 0, 182 &nousrreqs 183 }, 184 { SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 185 esp4_input, 0, esp4_ctlinput, 0, 186 0, 187 0, 0, 0, 0, 188 &nousrreqs 189 }, 190 { SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 191 ipcomp4_input, 0, 0, 0, 192 0, 193 0, 0, 0, 0, 194 &nousrreqs 195 }, 196 #endif /* FAST_IPSEC */ 197 { SOCK_RAW, &inetdomain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 198 encap4_input, 0, 0, rip_ctloutput, 199 0, 200 encap_init, 0, 0, 0, 201 &rip_usrreqs 202 }, 203 { SOCK_RAW, &inetdomain, IPPROTO_MOBILE, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 204 encap4_input, 0, 0, rip_ctloutput, 205 0, 206 encap_init, 0, 0, 0, 207 &rip_usrreqs 208 }, 209 { SOCK_RAW, &inetdomain, IPPROTO_GRE, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 210 encap4_input, 0, 0, rip_ctloutput, 211 0, 212 encap_init, 0, 0, 0, 213 &rip_usrreqs 214 }, 215 # ifdef INET6 216 { SOCK_RAW, &inetdomain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 217 encap4_input, 0, 0, rip_ctloutput, 218 0, 219 encap_init, 0, 0, 0, 220 &rip_usrreqs 221 }, 222 #endif 223 #ifdef IPXIP 224 { SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 225 ipxip_input, 0, ipxip_ctlinput, 0, 226 0, 227 0, 0, 0, 0, 228 &rip_usrreqs 229 }, 230 #endif 231 #ifdef PIM 232 { SOCK_RAW, &inetdomain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 233 pim_input, 0, 0, rip_ctloutput, 234 0, 235 0, 0, 0, 0, 236 &rip_usrreqs 237 }, 238 #endif /* PIM */ 239 #ifdef DEV_PFSYNC 240 { SOCK_RAW, &inetdomain, IPPROTO_PFSYNC, PR_ATOMIC|PR_ADDR, 241 pfsync_input, 0, 0, rip_ctloutput, 242 0, 243 0, 0, 0, 0, 244 &rip_usrreqs 245 }, 246 #endif /* DEV_PFSYNC */ 247 #ifdef DEV_CARP 248 { SOCK_RAW, &inetdomain, IPPROTO_CARP, PR_ATOMIC|PR_ADDR, 249 carp_input, (pr_output_t*)rip_output, 0, rip_ctloutput, 250 0, 251 0, 0, 0, 0, 252 &rip_usrreqs 253 }, 254 #endif /* DEV_CARP */ 255 /* Spacer n-times for loadable protocols. */ 256 IPPROTOSPACER, 257 IPPROTOSPACER, 258 IPPROTOSPACER, 259 IPPROTOSPACER, 260 IPPROTOSPACER, 261 IPPROTOSPACER, 262 IPPROTOSPACER, 263 IPPROTOSPACER, 264 /* raw wildcard */ 265 { SOCK_RAW, &inetdomain, 0, PR_ATOMIC|PR_ADDR, 266 rip_input, 0, 0, rip_ctloutput, 267 0, 268 rip_init, 0, 0, 0, 269 &rip_usrreqs 270 }, 271 }; 272 273 extern int in_inithead(void **, int); 274 275 struct domain inetdomain = 276 { AF_INET, "internet", 0, 0, 0, 277 inetsw, 278 &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 0, 279 in_inithead, 32, sizeof(struct sockaddr_in) 280 }; 281 282 DOMAIN_SET(inet); 283 284 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 285 "Internet Family"); 286 287 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 288 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 289 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 290 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 291 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 292 #ifdef FAST_IPSEC 293 /* XXX no protocol # to use, pick something "reserved" */ 294 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 295 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 296 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 297 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 298 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 299 #else 300 #ifdef IPSEC 301 SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC"); 302 #endif /* IPSEC */ 303 #endif /* !FAST_IPSEC */ 304 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 305 #ifdef PIM 306 SYSCTL_NODE(_net_inet, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); 307 #endif 308 #ifdef DEV_PFSYNC 309 SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC, pfsync, CTLFLAG_RW, 0, "PFSYNC"); 310 #endif 311 #ifdef DEV_CARP 312 SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP"); 313 #endif 314