1 /* $OpenBSD: in6_proto.c,v 1.46 2004/12/07 20:38:47 mcbride 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 #include <netinet6/pim6_var.h> 99 100 #include <netinet6/nd6.h> 101 102 #include <netinet6/ip6protosw.h> 103 104 #include "gif.h" 105 #if NGIF > 0 106 #include <netinet6/in6_gif.h> 107 #endif 108 109 #include "carp.h" 110 #if NCARP > 0 111 #include <netinet/ip_carp.h> 112 #endif 113 114 /* 115 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 116 */ 117 118 extern struct domain inet6domain; 119 120 struct ip6protosw inet6sw[] = { 121 { 0, &inet6domain, IPPROTO_IPV6, 0, 122 0, 0, 0, 0, 123 0, 124 ip6_init, 0, frag6_slowtimo, frag6_drain, 125 ip6_sysctl, 126 }, 127 { SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR, 128 udp6_input, 0, udp6_ctlinput, ip6_ctloutput, 129 udp6_usrreq, 0, 130 0, 0, 0, 131 udp_sysctl, 132 }, 133 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_ABRTACPTDIS, 134 tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput, 135 tcp6_usrreq, 136 #ifdef INET /* don't call initialization and timeout routines twice */ 137 0, 0, 0, tcp_drain, 138 #else 139 tcp_init, tcp_fasttimo, tcp_slowtimo, tcp_drain, 140 #endif 141 tcp_sysctl, 142 }, 143 { SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 144 rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 145 rip6_usrreq, 146 0, 0, 0, 0, 147 }, 148 { SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR, 149 icmp6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 150 rip6_usrreq, 151 icmp6_init, icmp6_fasttimo, 0, 0, 152 icmp6_sysctl, 153 }, 154 { SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR, 155 dest6_input, 0, 0, 0, 156 0, 157 0, 0, 0, 0, 158 }, 159 { SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR, 160 route6_input, 0, 0, 0, 161 0, 162 0, 0, 0, 0, 163 }, 164 { SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR, 165 frag6_input, 0, 0, 0, 166 0, 167 0, 0, 0, 0, 168 }, 169 #ifdef IPSEC 170 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 171 ah6_input, 0, 0, 0, 172 0, 173 0, 0, 0, 0, 174 ah_sysctl, 175 }, 176 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 177 esp6_input, 0, 0, 0, 178 0, 179 0, 0, 0, 0, 180 esp_sysctl, 181 }, 182 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 183 ipcomp6_input, 0, 0, 0, 184 0, 185 0, 0, 0, 0, 186 ipcomp_sysctl, 187 }, 188 #endif /* IPSEC */ 189 #if NGIF > 0 190 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR, 191 in6_gif_input, rip6_output, 0, rip6_ctloutput, 192 rip6_usrreq, /* XXX */ 193 0, 0, 0, 0, 194 }, 195 #ifdef INET 196 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR, 197 in6_gif_input, rip6_output, 0, rip6_ctloutput, 198 rip6_usrreq, /* XXX */ 199 0, 0, 0, 0, 200 }, 201 #endif /* INET */ 202 #else /* NGIF */ 203 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR, 204 ip4_input6, rip6_output, 0, rip6_ctloutput, 205 rip6_usrreq, /* XXX */ 206 0, 0, 0, 0, ipip_sysctl 207 }, 208 #ifdef INET 209 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR, 210 ip4_input6, rip6_output, 0, rip6_ctloutput, 211 rip6_usrreq, /* XXX */ 212 0, 0, 0, 0, 213 }, 214 #endif /* INET */ 215 #endif /* GIF */ 216 { SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR, 217 pim6_input, rip6_output, 0, rip6_ctloutput, 218 rip6_usrreq, 219 0, 0, 0, 0, 220 }, 221 #if NCARP > 0 222 { SOCK_RAW, &inet6domain, IPPROTO_CARP, PR_ATOMIC|PR_ADDR, 223 carp6_input, rip6_output, 0, rip6_ctloutput, 224 rip6_usrreq, 225 0, 0, 0, 0, carp_sysctl 226 }, 227 #endif /* NCARP */ 228 /* raw wildcard */ 229 { SOCK_RAW, &inet6domain, 0, PR_ATOMIC|PR_ADDR, 230 rip6_input, rip6_output, 0, rip6_ctloutput, 231 rip6_usrreq, rip6_init, 232 0, 0, 0, 233 }, 234 }; 235 236 struct domain inet6domain = 237 { AF_INET6, "internet6", 0, 0, 0, 238 (struct protosw *)inet6sw, 239 (struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 0, 240 #ifndef SMALL_KERNEL 241 rn_mpath_inithead, 242 #else 243 rn_inithead, 244 #endif 245 offsetof(struct sockaddr_in6, sin6_addr) << 3, 246 sizeof(struct sockaddr_in6), 247 in6_domifattach, in6_domifdetach, }; 248 249 /* 250 * Internet configuration info 251 */ 252 #ifndef IPV6FORWARDING 253 #ifdef GATEWAY6 254 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 255 #else 256 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 257 #endif /* GATEWAY6 */ 258 #endif /* !IPV6FORWARDING */ 259 260 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 261 int ip6_sendredirects = 1; 262 int ip6_defhlim = IPV6_DEFHLIM; 263 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 264 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 265 int ip6_maxfragpackets = 200; 266 int ip6_maxfrags = 200; 267 int ip6_log_interval = 5; 268 int ip6_hdrnestlimit = 50; /* appropriate? */ 269 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 270 int ip6_auto_flowlabel = 1; 271 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 272 int ip6_rr_prune = 5; /* router renumbering prefix 273 * walk list every 5 sec. */ 274 const int ip6_v6only = 1; 275 u_int32_t ip6_id = 0UL; 276 int ip6_keepfaith = 0; 277 time_t ip6_log_time = (time_t)0L; 278 279 /* icmp6 */ 280 /* 281 * BSDI4 defines these variables in in_proto.c... 282 * XXX: what if we don't define INET? Should we define pmtu6_expire 283 * or so? (jinmei@kame.net 19990310) 284 */ 285 int pmtu_expire = 60*10; 286 287 /* raw IP6 parameters */ 288 /* 289 * Nominal space allocated to a raw ip socket. 290 */ 291 #define RIPV6SNDQ 8192 292 #define RIPV6RCVQ 8192 293 294 u_long rip6_sendspace = RIPV6SNDQ; 295 u_long rip6_recvspace = RIPV6RCVQ; 296 297 /* ICMPV6 parameters */ 298 int icmp6_rediraccept = 1; /* accept and process redirects */ 299 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 300 struct timeval icmp6errratelim = { 0, 0 }; /* no ratelimit */ 301 int icmp6errppslim = 100; /* 100pps */ 302 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 303 304 /* UDP on IP6 parameters */ 305 int udp6_sendspace = 9216; /* really max datagram size */ 306 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6)); 307 /* 40 1K datagrams */ 308