1 /* $OpenBSD: in6_proto.c,v 1.94 2017/05/18 10:56:45 bluhm Exp $ */ 2 /* $KAME: in6_proto.c,v 1.66 2000/10/10 15:35:47 itojun Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1982, 1986, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 * 61 * @(#)in_proto.c 8.1 (Berkeley) 6/10/93 62 */ 63 64 #include <sys/param.h> 65 #include <sys/socket.h> 66 #include <sys/protosw.h> 67 #include <sys/kernel.h> 68 #include <sys/domain.h> 69 #include <sys/mbuf.h> 70 71 #include <net/if.h> 72 #include <net/if_var.h> 73 #include <net/route.h> 74 #include <net/rtable.h> 75 76 #include <netinet/in.h> 77 #include <netinet/ip.h> 78 #include <netinet/ip_var.h> 79 #include <netinet/in_pcb.h> 80 #include <netinet/ip6.h> 81 #include <netinet6/ip6_var.h> 82 #include <netinet/icmp6.h> 83 84 #include <netinet/tcp.h> 85 #include <netinet/tcp_timer.h> 86 #include <netinet/tcp_var.h> 87 #include <netinet/udp.h> 88 #include <netinet/udp_var.h> 89 #include <netinet/ip_ipsp.h> 90 #include <netinet/ip_ah.h> 91 #include <netinet/ip_esp.h> 92 #include <netinet/ip_ipip.h> 93 94 #include <netinet6/in6_var.h> 95 #include <netinet6/nd6.h> 96 #include <netinet6/ip6protosw.h> 97 98 #include "gif.h" 99 #if NGIF > 0 100 #include <netinet/ip_ether.h> 101 #include <net/if_gif.h> 102 #endif 103 104 #include "carp.h" 105 #if NCARP > 0 106 #include <netinet/ip_carp.h> 107 #endif 108 109 #include "pf.h" 110 #if NPF > 0 111 #include <netinet6/ip6_divert.h> 112 #endif 113 114 #include "etherip.h" 115 #if NETHERIP > 0 116 #include <net/if_etherip.h> 117 #endif 118 119 /* 120 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 121 */ 122 u_char ip6_protox[IPPROTO_MAX]; 123 124 struct protosw inet6sw[] = { 125 { 126 .pr_domain = &inet6domain, 127 .pr_protocol = IPPROTO_IPV6, 128 .pr_init = ip6_init, 129 .pr_slowtimo = frag6_slowtimo, 130 .pr_drain = frag6_drain, 131 .pr_sysctl = ip6_sysctl 132 }, 133 { 134 .pr_type = SOCK_DGRAM, 135 .pr_domain = &inet6domain, 136 .pr_protocol = IPPROTO_UDP, 137 .pr_flags = PR_ATOMIC|PR_ADDR|PR_SPLICE, 138 .pr_input = udp_input, 139 .pr_ctlinput = udp6_ctlinput, 140 .pr_ctloutput = ip6_ctloutput, 141 .pr_usrreq = udp_usrreq, 142 .pr_attach = udp_attach, 143 .pr_sysctl = udp_sysctl 144 }, 145 { 146 .pr_type = SOCK_STREAM, 147 .pr_domain = &inet6domain, 148 .pr_protocol = IPPROTO_TCP, 149 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_ABRTACPTDIS|PR_SPLICE, 150 .pr_input = tcp_input, 151 .pr_ctlinput = tcp6_ctlinput, 152 .pr_ctloutput = tcp_ctloutput, 153 .pr_usrreq = tcp_usrreq, 154 .pr_attach = tcp_attach, 155 .pr_sysctl = tcp_sysctl 156 }, 157 { 158 .pr_type = SOCK_RAW, 159 .pr_domain = &inet6domain, 160 .pr_protocol = IPPROTO_RAW, 161 .pr_flags = PR_ATOMIC|PR_ADDR, 162 .pr_input = rip6_input, 163 .pr_ctlinput = rip6_ctlinput, 164 .pr_ctloutput = rip6_ctloutput, 165 .pr_usrreq = rip6_usrreq, 166 .pr_attach = rip6_attach, 167 .pr_sysctl = rip6_sysctl 168 }, 169 { 170 .pr_type = SOCK_RAW, 171 .pr_domain = &inet6domain, 172 .pr_protocol = IPPROTO_ICMPV6, 173 .pr_flags = PR_ATOMIC|PR_ADDR, 174 .pr_input = icmp6_input, 175 .pr_ctlinput = rip6_ctlinput, 176 .pr_ctloutput = rip6_ctloutput, 177 .pr_usrreq = rip6_usrreq, 178 .pr_attach = rip6_attach, 179 .pr_init = icmp6_init, 180 .pr_fasttimo = icmp6_fasttimo, 181 .pr_sysctl = icmp6_sysctl 182 }, 183 { 184 .pr_type = SOCK_RAW, 185 .pr_domain = &inet6domain, 186 .pr_protocol = IPPROTO_DSTOPTS, 187 .pr_flags = PR_ATOMIC|PR_ADDR, 188 .pr_input = dest6_input 189 }, 190 { 191 .pr_type = SOCK_RAW, 192 .pr_domain = &inet6domain, 193 .pr_protocol = IPPROTO_ROUTING, 194 .pr_flags = PR_ATOMIC|PR_ADDR, 195 .pr_input = route6_input 196 }, 197 { 198 .pr_type = SOCK_RAW, 199 .pr_domain = &inet6domain, 200 .pr_protocol = IPPROTO_FRAGMENT, 201 .pr_flags = PR_ATOMIC|PR_ADDR, 202 .pr_input = frag6_input 203 }, 204 #ifdef IPSEC 205 { 206 .pr_type = SOCK_RAW, 207 .pr_domain = &inet6domain, 208 .pr_protocol = IPPROTO_AH, 209 .pr_flags = PR_ATOMIC|PR_ADDR, 210 .pr_input = ah6_input, 211 .pr_ctloutput = rip6_ctloutput, 212 .pr_usrreq = rip6_usrreq, 213 .pr_attach = rip6_attach, 214 .pr_sysctl = ah_sysctl 215 }, 216 { 217 .pr_type = SOCK_RAW, 218 .pr_domain = &inet6domain, 219 .pr_protocol = IPPROTO_ESP, 220 .pr_flags = PR_ATOMIC|PR_ADDR, 221 .pr_input = esp6_input, 222 .pr_ctloutput = rip6_ctloutput, 223 .pr_usrreq = rip6_usrreq, 224 .pr_attach = rip6_attach, 225 .pr_sysctl = esp_sysctl 226 }, 227 { 228 .pr_type = SOCK_RAW, 229 .pr_domain = &inet6domain, 230 .pr_protocol = IPPROTO_IPCOMP, 231 .pr_flags = PR_ATOMIC|PR_ADDR, 232 .pr_input = ipcomp6_input, 233 .pr_ctloutput = rip6_ctloutput, 234 .pr_usrreq = rip6_usrreq, 235 .pr_attach = rip6_attach, 236 .pr_sysctl = ipcomp_sysctl 237 }, 238 #endif /* IPSEC */ 239 { 240 .pr_type = SOCK_RAW, 241 .pr_domain = &inet6domain, 242 .pr_protocol = IPPROTO_IPV4, 243 .pr_flags = PR_ATOMIC|PR_ADDR, 244 #if NGIF > 0 245 .pr_input = in6_gif_input, 246 #else 247 .pr_input = ipip_input, 248 #endif 249 .pr_ctloutput = rip6_ctloutput, 250 .pr_usrreq = rip6_usrreq, /* XXX */ 251 .pr_attach = rip6_attach 252 }, 253 { 254 .pr_type = SOCK_RAW, 255 .pr_domain = &inet6domain, 256 .pr_protocol = IPPROTO_IPV6, 257 .pr_flags = PR_ATOMIC|PR_ADDR, 258 #if NGIF > 0 259 .pr_input = in6_gif_input, 260 #else 261 .pr_input = ipip_input, 262 #endif 263 .pr_ctloutput = rip6_ctloutput, 264 .pr_usrreq = rip6_usrreq, /* XXX */ 265 .pr_attach = rip6_attach, 266 }, 267 #if NGIF > 0 268 { 269 .pr_type = SOCK_RAW, 270 .pr_domain = &inet6domain, 271 .pr_protocol = IPPROTO_ETHERIP, 272 .pr_flags = PR_ATOMIC|PR_ADDR, 273 .pr_input = etherip_input, 274 .pr_ctloutput = rip6_ctloutput, 275 .pr_usrreq = rip6_usrreq, 276 .pr_attach = rip6_attach, 277 .pr_sysctl = etherip_sysctl 278 }, 279 #endif /* NGIF */ 280 #if NCARP > 0 281 { 282 .pr_type = SOCK_RAW, 283 .pr_domain = &inet6domain, 284 .pr_protocol = IPPROTO_CARP, 285 .pr_flags = PR_ATOMIC|PR_ADDR, 286 .pr_input = carp6_proto_input, 287 .pr_ctloutput = rip6_ctloutput, 288 .pr_usrreq = rip6_usrreq, 289 .pr_attach = rip6_attach, 290 .pr_sysctl = carp_sysctl 291 }, 292 #endif /* NCARP */ 293 #if NPF > 0 294 { 295 .pr_type = SOCK_RAW, 296 .pr_domain = &inet6domain, 297 .pr_protocol = IPPROTO_DIVERT, 298 .pr_flags = PR_ATOMIC|PR_ADDR, 299 .pr_ctloutput = rip6_ctloutput, 300 .pr_usrreq = divert6_usrreq, 301 .pr_attach = divert6_attach, 302 .pr_init = divert6_init, 303 .pr_sysctl = divert6_sysctl 304 }, 305 #endif /* NPF > 0 */ 306 #if NETHERIP > 0 307 { 308 .pr_type = SOCK_RAW, 309 .pr_domain = &inet6domain, 310 .pr_protocol = IPPROTO_ETHERIP, 311 .pr_flags = PR_ATOMIC|PR_ADDR, 312 .pr_input = ip6_etherip_input, 313 .pr_ctloutput = rip6_ctloutput, 314 .pr_usrreq = rip6_usrreq, 315 .pr_attach = rip6_attach, 316 .pr_sysctl = ip_etherip_sysctl 317 }, 318 #endif /* NETHERIP */ 319 { 320 /* raw wildcard */ 321 .pr_type = SOCK_RAW, 322 .pr_domain = &inet6domain, 323 .pr_flags = PR_ATOMIC|PR_ADDR, 324 .pr_input = rip6_input, 325 .pr_ctloutput = rip6_ctloutput, 326 .pr_usrreq = rip6_usrreq, 327 .pr_attach = rip6_attach, 328 .pr_init = rip6_init 329 } 330 }; 331 332 struct domain inet6domain = { 333 .dom_family = AF_INET6, 334 .dom_name = "internet6", 335 .dom_protosw = inet6sw, 336 .dom_protoswNPROTOSW = &inet6sw[nitems(inet6sw)], 337 .dom_rtkeylen = sizeof(struct sockaddr_in6), 338 .dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr), 339 .dom_maxplen = 128, 340 .dom_ifattach = in6_domifattach, 341 .dom_ifdetach = in6_domifdetach 342 }; 343 344 /* 345 * Internet configuration info 346 */ 347 int ip6_forwarding = 0; /* no forwarding unless sysctl'd to enable */ 348 int ip6_mforwarding = 0; /* no multicast forwarding unless ... */ 349 int ip6_multipath = 0; /* no using multipath routes unless ... */ 350 int ip6_sendredirects = 1; 351 int ip6_defhlim = IPV6_DEFHLIM; 352 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 353 int ip6_maxfragpackets = 200; 354 int ip6_maxfrags = 200; 355 int ip6_log_interval = 5; 356 int ip6_hdrnestlimit = 10; /* appropriate? */ 357 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 358 int ip6_dad_pending; /* number of currently running DADs */ 359 int ip6_auto_flowlabel = 1; 360 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 361 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */ 362 int ip6_neighborgcthresh = 2048; /* Threshold # of NDP entries for GC */ 363 int ip6_maxifprefixes = 16; /* Max acceptable prefixes via RA per IF */ 364 int ip6_maxifdefrouters = 16; /* Max acceptable def routers via RA */ 365 int ip6_maxdynroutes = 4096; /* Max # of routes created via redirect */ 366 time_t ip6_log_time = (time_t)0L; 367 368 /* raw IP6 parameters */ 369 /* 370 * Nominal space allocated to a raw ip socket. 371 */ 372 #define RIPV6SNDQ 8192 373 #define RIPV6RCVQ 8192 374 375 u_long rip6_sendspace = RIPV6SNDQ; 376 u_long rip6_recvspace = RIPV6RCVQ; 377 378 /* ICMPV6 parameters */ 379 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 380 int icmp6errppslim = 100; /* 100pps */ 381 int ip6_mtudisc_timeout = IPMTUDISCTIMEOUT; 382