1 /* $OpenBSD: in6_proto.c,v 1.57 2008/11/25 12:11:45 markus 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/in_systm.h> 80 #include <netinet/in_var.h> 81 #include <netinet/ip.h> 82 #include <netinet/ip_var.h> 83 #include <netinet/in_pcb.h> 84 #include <netinet/ip6.h> 85 #include <netinet6/ip6_var.h> 86 #include <netinet/icmp6.h> 87 88 #include <netinet/tcp.h> 89 #include <netinet/tcp_timer.h> 90 #include <netinet/tcp_var.h> 91 #include <netinet/udp.h> 92 #include <netinet/udp_var.h> 93 #include <netinet/ip_ipsp.h> 94 #include <netinet/ip_ah.h> 95 #include <netinet/ip_esp.h> 96 #include <netinet/ip_ipip.h> 97 98 #ifdef MROUTING 99 #include <netinet6/pim6_var.h> 100 #endif 101 102 #include <netinet6/nd6.h> 103 104 #include <netinet6/ip6protosw.h> 105 106 #include "gif.h" 107 #if NGIF > 0 108 #include <netinet6/in6_gif.h> 109 #endif 110 111 #include "carp.h" 112 #if NCARP > 0 113 #include <netinet/ip_carp.h> 114 #endif 115 116 /* 117 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 118 */ 119 120 extern struct domain inet6domain; 121 122 struct ip6protosw inet6sw[] = { 123 { 0, &inet6domain, IPPROTO_IPV6, 0, 124 0, 0, 0, 0, 125 0, 126 ip6_init, 0, frag6_slowtimo, frag6_drain, 127 ip6_sysctl, 128 }, 129 { SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR, 130 udp6_input, 0, udp6_ctlinput, ip6_ctloutput, 131 udp_usrreq, 0, 132 0, 0, 0, 133 udp_sysctl, 134 }, 135 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_ABRTACPTDIS, 136 tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput, 137 tcp_usrreq, 138 #ifdef INET /* don't call initialization and timeout routines twice */ 139 0, 0, 0, 0, 140 #else 141 tcp_init, tcp_fasttimo, tcp_slowtimo, 0, 142 #endif 143 tcp_sysctl, 144 }, 145 { SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 146 rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 147 rip6_usrreq, 148 0, 0, 0, 0, rip6_sysctl 149 }, 150 { SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR, 151 icmp6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 152 rip6_usrreq, 153 icmp6_init, icmp6_fasttimo, 0, 0, 154 icmp6_sysctl, 155 }, 156 { SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR, 157 dest6_input, 0, 0, 0, 158 0, 159 0, 0, 0, 0, 160 }, 161 { SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR, 162 route6_input, 0, 0, 0, 163 0, 164 0, 0, 0, 0, 165 }, 166 { SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR, 167 frag6_input, 0, 0, 0, 168 0, 169 0, 0, 0, 0, 170 }, 171 #ifdef IPSEC 172 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 173 ah6_input, 0, 0, 0, 174 0, 175 0, 0, 0, 0, 176 ah_sysctl, 177 }, 178 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 179 esp6_input, 0, 0, 0, 180 0, 181 0, 0, 0, 0, 182 esp_sysctl, 183 }, 184 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 185 ipcomp6_input, 0, 0, 0, 186 0, 187 0, 0, 0, 0, 188 ipcomp_sysctl, 189 }, 190 #endif /* IPSEC */ 191 #if NGIF > 0 192 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR, 193 in6_gif_input, rip6_output, 0, rip6_ctloutput, 194 rip6_usrreq, /* XXX */ 195 0, 0, 0, 0, 196 }, 197 #ifdef INET 198 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR, 199 in6_gif_input, rip6_output, 0, rip6_ctloutput, 200 rip6_usrreq, /* XXX */ 201 0, 0, 0, 0, 202 }, 203 #endif /* INET */ 204 #else /* NGIF */ 205 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR, 206 ip4_input6, rip6_output, 0, rip6_ctloutput, 207 rip6_usrreq, /* XXX */ 208 0, 0, 0, 0, ipip_sysctl 209 }, 210 #ifdef INET 211 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR, 212 ip4_input6, rip6_output, 0, rip6_ctloutput, 213 rip6_usrreq, /* XXX */ 214 0, 0, 0, 0, 215 }, 216 #endif /* INET */ 217 #endif /* GIF */ 218 #ifdef MROUTING 219 { SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR, 220 pim6_input, rip6_output, 0, rip6_ctloutput, 221 rip6_usrreq, 222 0, 0, 0, 0, pim6_sysctl 223 }, 224 #endif 225 #if NCARP > 0 226 { SOCK_RAW, &inet6domain, IPPROTO_CARP, PR_ATOMIC|PR_ADDR, 227 carp6_proto_input, rip6_output, 0, rip6_ctloutput, 228 rip6_usrreq, 229 0, 0, 0, 0, carp_sysctl 230 }, 231 #endif /* NCARP */ 232 /* raw wildcard */ 233 { SOCK_RAW, &inet6domain, 0, PR_ATOMIC|PR_ADDR, 234 rip6_input, rip6_output, 0, rip6_ctloutput, 235 rip6_usrreq, rip6_init, 236 0, 0, 0, 237 }, 238 }; 239 240 struct domain inet6domain = 241 { AF_INET6, "internet6", 0, 0, 0, 242 (struct protosw *)inet6sw, 243 (struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 0, 244 #ifndef SMALL_KERNEL 245 rn_mpath_inithead, 246 #else 247 rn_inithead, 248 #endif 249 offsetof(struct sockaddr_in6, sin6_addr) << 3, 250 sizeof(struct sockaddr_in6), 251 in6_domifattach, in6_domifdetach, }; 252 253 /* 254 * Internet configuration info 255 */ 256 int ip6_forwarding = 0; /* no forwarding unless sysctl'd to enable */ 257 int ip6_mforwarding = 0; /* no multicast forwarding unless ... */ 258 int ip6_multipath = 0; /* no using multipath routes unless ... */ 259 int ip6_sendredirects = 1; 260 int ip6_defhlim = IPV6_DEFHLIM; 261 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 262 int ip6_accept_rtadv = 0; /* enabling forwarding and rtadv concurrently is dangerous */ 263 int ip6_maxfragpackets = 200; 264 int ip6_maxfrags = 200; 265 int ip6_log_interval = 5; 266 int ip6_hdrnestlimit = 10; /* appropriate? */ 267 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 268 int ip6_dad_pending; /* number of currently running DADs */ 269 int ip6_auto_flowlabel = 1; 270 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 271 int ip6_rr_prune = 5; /* router renumbering prefix 272 * walk list every 5 sec. */ 273 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */ 274 const int ip6_v6only = 1; 275 int ip6_neighborgcthresh = 2048; /* Threshold # of NDP entries for GC */ 276 int ip6_maxifprefixes = 16; /* Max acceptable prefixes via RA per IF */ 277 int ip6_maxifdefrouters = 16; /* Max acceptable def routers via RA */ 278 int ip6_maxdynroutes = 4096; /* Max # of routes created via redirect */ 279 u_int32_t ip6_id = 0UL; 280 int ip6_keepfaith = 0; 281 time_t ip6_log_time = (time_t)0L; 282 283 /* icmp6 */ 284 /* 285 * BSDI4 defines these variables in in_proto.c... 286 * XXX: what if we don't define INET? Should we define pmtu6_expire 287 * or so? (jinmei@kame.net 19990310) 288 */ 289 int pmtu_expire = 60*10; 290 291 /* raw IP6 parameters */ 292 /* 293 * Nominal space allocated to a raw ip socket. 294 */ 295 #define RIPV6SNDQ 8192 296 #define RIPV6RCVQ 8192 297 298 u_long rip6_sendspace = RIPV6SNDQ; 299 u_long rip6_recvspace = RIPV6RCVQ; 300 301 /* ICMPV6 parameters */ 302 int icmp6_rediraccept = 1; /* accept and process redirects */ 303 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 304 struct timeval icmp6errratelim = { 0, 0 }; /* no ratelimit */ 305 int icmp6errppslim = 100; /* 100pps */ 306 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 307 308 /* UDP on IP6 parameters */ 309 int udp6_sendspace = 9216; /* really max datagram size */ 310 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6)); 311 /* 40 1K datagrams */ 312