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