1 /* $OpenBSD: in6_proto.c,v 1.75 2014/08/27 14:04:16 florian 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/radix.h> 73 #ifndef SMALL_KERNEL 74 #include <net/radix_mpath.h> 75 #endif 76 #include <net/route.h> 77 78 #include <netinet/in.h> 79 #include <netinet/ip.h> 80 #include <netinet/ip_var.h> 81 #include <netinet/in_pcb.h> 82 #include <netinet/ip6.h> 83 #include <netinet6/ip6_var.h> 84 #include <netinet/icmp6.h> 85 86 #include <netinet/tcp.h> 87 #include <netinet/tcp_timer.h> 88 #include <netinet/tcp_var.h> 89 #include <netinet/udp.h> 90 #include <netinet/udp_var.h> 91 #include <netinet/ip_ipsp.h> 92 #include <netinet/ip_ah.h> 93 #include <netinet/ip_esp.h> 94 #include <netinet/ip_ipip.h> 95 96 #ifdef PIM 97 #include <netinet6/pim6_var.h> 98 #endif 99 100 #include <netinet6/in6_var.h> 101 #include <netinet6/nd6.h> 102 #include <netinet6/ip6protosw.h> 103 104 #include "gif.h" 105 #if NGIF > 0 106 #include <netinet/ip_ether.h> 107 #include <netinet6/in6_gif.h> 108 #endif 109 110 #include "carp.h" 111 #if NCARP > 0 112 #include <netinet/ip_carp.h> 113 #endif 114 115 #include "pf.h" 116 #if NPF > 0 117 #include <netinet6/ip6_divert.h> 118 #endif 119 120 /* 121 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 122 */ 123 u_char ip6_protox[IPPROTO_MAX]; 124 125 struct ip6protosw inet6sw[] = { 126 { 0, &inet6domain, IPPROTO_IPV6, 0, 127 0, 0, 0, 0, 128 0, 129 ip6_init, 0, frag6_slowtimo, frag6_drain, 130 ip6_sysctl, 131 }, 132 { SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR|PR_SPLICE, 133 udp6_input, 0, udp6_ctlinput, ip6_ctloutput, 134 udp_usrreq, 0, 135 0, 0, 0, 136 udp_sysctl, 137 }, 138 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_ABRTACPTDIS|PR_SPLICE, 139 tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput, 140 tcp_usrreq, 141 #ifdef INET /* don't call initialization and timeout routines twice */ 142 0, 0, 0, 0, 143 #else 144 tcp_init, tcp_fasttimo, tcp_slowtimo, 0, 145 #endif 146 tcp_sysctl, 147 }, 148 { SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 149 rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 150 rip6_usrreq, 151 0, 0, 0, 0, rip6_sysctl 152 }, 153 { SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR, 154 icmp6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 155 rip6_usrreq, 156 icmp6_init, icmp6_fasttimo, 0, 0, 157 icmp6_sysctl, 158 }, 159 { SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR, 160 dest6_input, 0, 0, 0, 161 0, 162 0, 0, 0, 0, 163 }, 164 { SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR, 165 route6_input, 0, 0, 0, 166 0, 167 0, 0, 0, 0, 168 }, 169 { SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR, 170 frag6_input, 0, 0, 0, 171 0, 172 0, 0, 0, 0, 173 }, 174 #ifdef IPSEC 175 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 176 ah6_input, rip6_output, 0, rip6_ctloutput, 177 rip6_usrreq, 178 0, 0, 0, 0, 179 ah_sysctl, 180 }, 181 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 182 esp6_input, rip6_output, 0, rip6_ctloutput, 183 rip6_usrreq, 184 0, 0, 0, 0, 185 esp_sysctl, 186 }, 187 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 188 ipcomp6_input, rip6_output, 0, rip6_ctloutput, 189 rip6_usrreq, 190 0, 0, 0, 0, 191 ipcomp_sysctl, 192 }, 193 #endif /* IPSEC */ 194 #if NGIF > 0 195 { SOCK_RAW, &inet6domain, IPPROTO_ETHERIP,PR_ATOMIC|PR_ADDR, 196 etherip_input6, rip6_output, 0, rip6_ctloutput, 197 rip6_usrreq, 198 0, 0, 0, 0, etherip_sysctl 199 }, 200 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR, 201 in6_gif_input, rip6_output, 0, rip6_ctloutput, 202 rip6_usrreq, /* XXX */ 203 0, 0, 0, 0, 204 }, 205 #ifdef INET 206 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR, 207 in6_gif_input, rip6_output, 0, rip6_ctloutput, 208 rip6_usrreq, /* XXX */ 209 0, 0, 0, 0, 210 }, 211 #endif /* INET */ 212 #else /* NGIF */ 213 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR, 214 ip4_input6, rip6_output, 0, rip6_ctloutput, 215 rip6_usrreq, /* XXX */ 216 0, 0, 0, 0, ipip_sysctl 217 }, 218 #ifdef INET 219 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR, 220 ip4_input6, rip6_output, 0, rip6_ctloutput, 221 rip6_usrreq, /* XXX */ 222 0, 0, 0, 0, 223 }, 224 #endif /* INET */ 225 #endif /* GIF */ 226 #ifdef PIM 227 { SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR, 228 pim6_input, rip6_output, 0, rip6_ctloutput, 229 rip6_usrreq, 230 0, 0, 0, 0, pim6_sysctl 231 }, 232 #endif /* PIM */ 233 #if NCARP > 0 234 { SOCK_RAW, &inet6domain, IPPROTO_CARP, PR_ATOMIC|PR_ADDR, 235 carp6_proto_input, rip6_output, 0, rip6_ctloutput, 236 rip6_usrreq, 237 0, 0, 0, 0, carp_sysctl 238 }, 239 #endif /* NCARP */ 240 #if NPF > 0 241 { SOCK_RAW, &inet6domain, IPPROTO_DIVERT, PR_ATOMIC|PR_ADDR, 242 divert6_input, 0, 0, rip6_ctloutput, 243 divert6_usrreq, 244 divert6_init, 0, 0, 0, divert6_sysctl 245 }, 246 #endif /* NPF > 0 */ 247 /* raw wildcard */ 248 { SOCK_RAW, &inet6domain, 0, PR_ATOMIC|PR_ADDR, 249 rip6_input, rip6_output, 0, rip6_ctloutput, 250 rip6_usrreq, rip6_init, 251 0, 0, 0, 252 }, 253 }; 254 255 struct domain inet6domain = 256 { AF_INET6, "internet6", 0, 0, 0, 257 (struct protosw *)inet6sw, 258 (struct protosw *)&inet6sw[nitems(inet6sw)], 0, 259 #ifndef SMALL_KERNEL 260 rn_mpath_inithead, 261 #else 262 rn_inithead, 263 #endif 264 offsetof(struct sockaddr_in6, sin6_addr) << 3, 265 sizeof(struct sockaddr_in6), 266 in6_domifattach, in6_domifdetach, }; 267 268 /* 269 * Internet configuration info 270 */ 271 int ip6_forwarding = 0; /* no forwarding unless sysctl'd to enable */ 272 int ip6_mforwarding = 0; /* no multicast forwarding unless ... */ 273 int ip6_multipath = 0; /* no using multipath routes unless ... */ 274 int ip6_sendredirects = 1; 275 int ip6_defhlim = IPV6_DEFHLIM; 276 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 277 int ip6_maxfragpackets = 200; 278 int ip6_maxfrags = 200; 279 int ip6_log_interval = 5; 280 int ip6_hdrnestlimit = 10; /* appropriate? */ 281 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 282 int ip6_dad_pending; /* number of currently running DADs */ 283 int ip6_auto_flowlabel = 1; 284 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 285 int ip6_rr_prune = 5; /* router renumbering prefix 286 * walk list every 5 sec. */ 287 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */ 288 const int ip6_v6only = 1; 289 int ip6_neighborgcthresh = 2048; /* Threshold # of NDP entries for GC */ 290 int ip6_maxifprefixes = 16; /* Max acceptable prefixes via RA per IF */ 291 int ip6_maxifdefrouters = 16; /* Max acceptable def routers via RA */ 292 int ip6_maxdynroutes = 4096; /* Max # of routes created via redirect */ 293 time_t ip6_log_time = (time_t)0L; 294 295 /* raw IP6 parameters */ 296 /* 297 * Nominal space allocated to a raw ip socket. 298 */ 299 #define RIPV6SNDQ 8192 300 #define RIPV6RCVQ 8192 301 302 u_long rip6_sendspace = RIPV6SNDQ; 303 u_long rip6_recvspace = RIPV6RCVQ; 304 305 /* ICMPV6 parameters */ 306 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 307 int icmp6errppslim = 100; /* 100pps */ 308 int ip6_mtudisc_timeout = IPMTUDISCTIMEOUT; 309