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