1 /* $OpenBSD: in6_proto.c,v 1.41 2003/06/02 23:28:15 millert 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 #include <net/route.h> 74 75 #include <netinet/in.h> 76 #include <netinet/in_systm.h> 77 #include <netinet/in_var.h> 78 #include <netinet/ip.h> 79 #include <netinet/ip_var.h> 80 #include <netinet/in_pcb.h> 81 #include <netinet/ip6.h> 82 #include <netinet6/ip6_var.h> 83 #include <netinet/icmp6.h> 84 85 #include <netinet/tcp.h> 86 #include <netinet/tcp_timer.h> 87 #include <netinet/tcp_var.h> 88 #include <netinet/udp.h> 89 #include <netinet/udp_var.h> 90 #include <netinet/ip_ipsp.h> 91 #include <netinet/ip_ah.h> 92 #include <netinet/ip_esp.h> 93 #include <netinet/ip_ipip.h> 94 95 #include <netinet6/pim6_var.h> 96 97 #include <netinet6/nd6.h> 98 99 #include <netinet6/ip6protosw.h> 100 101 #include "gif.h" 102 #if NGIF > 0 103 #include <netinet6/in6_gif.h> 104 #endif 105 106 /* 107 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 108 */ 109 110 extern struct domain inet6domain; 111 112 struct ip6protosw inet6sw[] = { 113 { 0, &inet6domain, IPPROTO_IPV6, 0, 114 0, 0, 0, 0, 115 0, 116 ip6_init, 0, frag6_slowtimo, frag6_drain, 117 ip6_sysctl, 118 }, 119 { SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR, 120 udp6_input, 0, udp6_ctlinput, ip6_ctloutput, 121 udp6_usrreq, 0, 122 0, 0, 0, 123 udp_sysctl, 124 }, 125 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_ABRTACPTDIS, 126 tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput, 127 tcp6_usrreq, 128 #ifdef INET /* don't call initialization and timeout routines twice */ 129 0, 0, 0, tcp_drain, 130 #else 131 tcp_init, tcp_fasttimo, tcp_slowtimo, tcp_drain, 132 #endif 133 tcp_sysctl, 134 }, 135 { SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 136 rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 137 rip6_usrreq, 138 0, 0, 0, 0, 139 }, 140 { SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR, 141 icmp6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 142 rip6_usrreq, 143 icmp6_init, icmp6_fasttimo, 0, 0, 144 icmp6_sysctl, 145 }, 146 { SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR, 147 dest6_input, 0, 0, 0, 148 0, 149 0, 0, 0, 0, 150 }, 151 { SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR, 152 route6_input, 0, 0, 0, 153 0, 154 0, 0, 0, 0, 155 }, 156 { SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR, 157 frag6_input, 0, 0, 0, 158 0, 159 0, 0, 0, 0, 160 }, 161 #ifdef IPSEC 162 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 163 ah6_input, 0, 0, 0, 164 0, 165 0, 0, 0, 0, 166 ah_sysctl, 167 }, 168 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 169 esp6_input, 0, 0, 0, 170 0, 171 0, 0, 0, 0, 172 esp_sysctl, 173 }, 174 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 175 ipcomp6_input, 0, 0, 0, 176 0, 177 0, 0, 0, 0, 178 ipcomp_sysctl, 179 }, 180 #endif /* IPSEC */ 181 #if NGIF > 0 182 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR, 183 in6_gif_input, rip6_output, 0, rip6_ctloutput, 184 rip6_usrreq, /* XXX */ 185 0, 0, 0, 0, 186 }, 187 #ifdef INET 188 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR, 189 in6_gif_input, rip6_output, 0, rip6_ctloutput, 190 rip6_usrreq, /* XXX */ 191 0, 0, 0, 0, 192 }, 193 #endif /* INET */ 194 #else /* NGIF */ 195 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR, 196 ip4_input6, rip6_output, 0, rip6_ctloutput, 197 rip6_usrreq, /* XXX */ 198 0, 0, 0, 0, ipip_sysctl 199 }, 200 #ifdef INET 201 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR, 202 ip4_input6, rip6_output, 0, rip6_ctloutput, 203 rip6_usrreq, /* XXX */ 204 0, 0, 0, 0, 205 }, 206 #endif /* INET */ 207 #endif /* GIF */ 208 { SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR, 209 pim6_input, rip6_output, 0, rip6_ctloutput, 210 rip6_usrreq, 211 0, 0, 0, 0, 212 }, 213 /* raw wildcard */ 214 { SOCK_RAW, &inet6domain, 0, PR_ATOMIC|PR_ADDR, 215 rip6_input, rip6_output, 0, rip6_ctloutput, 216 rip6_usrreq, rip6_init, 217 0, 0, 0, 218 }, 219 }; 220 221 struct domain inet6domain = 222 { AF_INET6, "internet6", 0, 0, 0, 223 (struct protosw *)inet6sw, 224 (struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 0, 225 rn_inithead, 226 offsetof(struct sockaddr_in6, sin6_addr) << 3, 227 sizeof(struct sockaddr_in6), 228 in6_domifattach, in6_domifdetach, }; 229 230 /* 231 * Internet configuration info 232 */ 233 #ifndef IPV6FORWARDING 234 #ifdef GATEWAY6 235 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 236 #else 237 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 238 #endif /* GATEWAY6 */ 239 #endif /* !IPV6FORWARDING */ 240 241 #ifndef IPV6_SENDREDIRECTS 242 #define IPV6_SENDREDIRECTS 1 243 #endif 244 245 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 246 int ip6_sendredirects = IPV6_SENDREDIRECTS; 247 int ip6_defhlim = IPV6_DEFHLIM; 248 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 249 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 250 int ip6_maxfragpackets = 200; 251 int ip6_maxfrags = 200; 252 int ip6_log_interval = 5; 253 int ip6_hdrnestlimit = 50; /* appropriate? */ 254 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 255 u_int32_t ip6_flow_seq; 256 int ip6_auto_flowlabel = 1; 257 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 258 int ip6_rr_prune = 5; /* router renumbering prefix 259 * walk list every 5 sec. */ 260 const int ip6_v6only = 1; 261 u_int32_t ip6_id = 0UL; 262 int ip6_keepfaith = 0; 263 time_t ip6_log_time = (time_t)0L; 264 265 /* icmp6 */ 266 /* 267 * BSDI4 defines these variables in in_proto.c... 268 * XXX: what if we don't define INET? Should we define pmtu6_expire 269 * or so? (jinmei@kame.net 19990310) 270 */ 271 int pmtu_expire = 60*10; 272 273 /* raw IP6 parameters */ 274 /* 275 * Nominal space allocated to a raw ip socket. 276 */ 277 #define RIPV6SNDQ 8192 278 #define RIPV6RCVQ 8192 279 280 u_long rip6_sendspace = RIPV6SNDQ; 281 u_long rip6_recvspace = RIPV6RCVQ; 282 283 /* ICMPV6 parameters */ 284 int icmp6_rediraccept = 1; /* accept and process redirects */ 285 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 286 struct timeval icmp6errratelim = { 0, 0 }; /* no ratelimit */ 287 int icmp6errppslim = 100; /* 100pps */ 288 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 289 290 /* UDP on IP6 parameters */ 291 int udp6_sendspace = 9216; /* really max datagram size */ 292 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6)); 293 /* 40 1K datagrams */ 294