1 /* $OpenBSD: in6_proto.c,v 1.31 2001/08/08 15:09:00 jjbg 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. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Berkeley and its contributors. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * @(#)in_proto.c 8.1 (Berkeley) 6/10/93 66 */ 67 68 #include <sys/param.h> 69 #include <sys/socket.h> 70 #include <sys/protosw.h> 71 #include <sys/kernel.h> 72 #include <sys/domain.h> 73 #include <sys/mbuf.h> 74 75 #include <net/if.h> 76 #include <net/radix.h> 77 #include <net/route.h> 78 79 #include <netinet/in.h> 80 #include <netinet/in_systm.h> 81 #include <netinet/in_var.h> 82 #include <netinet/ip.h> 83 #include <netinet/ip_var.h> 84 #include <netinet/in_pcb.h> 85 #include <netinet/ip6.h> 86 #include <netinet6/ip6_var.h> 87 #include <netinet/icmp6.h> 88 89 #include <netinet/tcp.h> 90 #include <netinet/tcp_timer.h> 91 #include <netinet/tcp_var.h> 92 #include <netinet/udp.h> 93 #include <netinet/udp_var.h> 94 #include <netinet/ip_ipsp.h> 95 #include <netinet/ip_ah.h> 96 #include <netinet/ip_esp.h> 97 #include <netinet/ip_ipip.h> 98 99 #include <netinet6/pim6_var.h> 100 101 #include <netinet6/nd6.h> 102 103 #include <netinet6/ip6protosw.h> 104 105 #include "gif.h" 106 #if NGIF > 0 107 #include <netinet6/in6_gif.h> 108 #endif 109 110 /* 111 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 112 */ 113 114 extern struct domain inet6domain; 115 116 struct ip6protosw inet6sw[] = { 117 { 0, &inet6domain, IPPROTO_IPV6, 0, 118 0, 0, 0, 0, 119 0, 120 ip6_init, 0, frag6_slowtimo, frag6_drain, 121 ip6_sysctl, 122 }, 123 { SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR, 124 udp6_input, 0, udp6_ctlinput, ip6_ctloutput, 125 udp6_usrreq, 0, 126 0, 0, 0, 127 udp_sysctl, 128 }, 129 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_ABRTACPTDIS, 130 tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput, 131 tcp6_usrreq, 132 #ifdef INET /* don't call initialization and timeout routines twice */ 133 0, 0, 0, tcp_drain, 134 #else 135 tcp_init, tcp_fasttimo, tcp_slowtimo, tcp_drain, 136 #endif 137 tcp_sysctl, 138 }, 139 { SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 140 rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 141 rip6_usrreq, 142 0, 0, 0, 0, 143 }, 144 { SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR, 145 icmp6_input, rip6_output, 0, rip6_ctloutput, 146 rip6_usrreq, 147 icmp6_init, icmp6_fasttimo, 0, 0, 148 icmp6_sysctl, 149 }, 150 { SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR, 151 dest6_input, 0, 0, 0, 152 0, 153 0, 0, 0, 0, 154 }, 155 { SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR, 156 route6_input, 0, 0, 0, 157 0, 158 0, 0, 0, 0, 159 }, 160 { SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR, 161 frag6_input, 0, 0, 0, 162 0, 163 0, 0, 0, 0, 164 }, 165 #ifdef IPSEC 166 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 167 ah6_input, 0, 0, 0, 168 0, 169 0, 0, 0, 0, 170 ah_sysctl, 171 }, 172 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 173 esp6_input, 0, 0, 0, 174 0, 175 0, 0, 0, 0, 176 esp_sysctl, 177 }, 178 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 179 ipcomp6_input, 0, 0, 0, 180 0, 181 0, 0, 0, 0, 182 ipcomp_sysctl, 183 }, 184 #endif /* IPSEC */ 185 #if NGIF > 0 186 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR, 187 in6_gif_input,0, 0, 0, 188 0, 189 0, 0, 0, 0, 190 }, 191 #ifdef INET 192 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR, 193 in6_gif_input,0, 0, 0, 194 0, 195 0, 0, 0, 0, 196 }, 197 #endif /* INET */ 198 #else /* NGIF */ 199 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR, 200 ip4_input6, rip6_output, 0, rip6_ctloutput, 201 rip6_usrreq, /* XXX */ 202 0, 0, 0, 0, ipip_sysctl 203 }, 204 #ifdef INET 205 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR, 206 ip4_input6, rip6_output, 0, rip6_ctloutput, 207 0, 208 0, 0, 0, 0, 209 }, 210 #endif /* INET */ 211 #endif /* GIF */ 212 { SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR, 213 pim6_input, rip6_output, 0, rip6_ctloutput, 214 rip6_usrreq, 215 0, 0, 0, 0, 216 }, 217 /* raw wildcard */ 218 { SOCK_RAW, &inet6domain, 0, PR_ATOMIC|PR_ADDR, 219 rip6_input, rip6_output, 0, rip6_ctloutput, 220 rip6_usrreq, rip6_init, 221 0, 0, 0, 222 }, 223 }; 224 225 struct domain inet6domain = 226 { AF_INET6, "internet6", 0, 0, 0, 227 (struct protosw *)inet6sw, 228 (struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 0, 229 rn_inithead, 230 offsetof(struct sockaddr_in6, sin6_addr) << 3, 231 sizeof(struct sockaddr_in6) }; 232 233 /* 234 * Internet configuration info 235 */ 236 #ifndef IPV6FORWARDING 237 #ifdef GATEWAY6 238 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 239 #else 240 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 241 #endif /* GATEWAY6 */ 242 #endif /* !IPV6FORWARDING */ 243 244 #ifndef IPV6_SENDREDIRECTS 245 #define IPV6_SENDREDIRECTS 1 246 #endif 247 248 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 249 int ip6_sendredirects = IPV6_SENDREDIRECTS; 250 int ip6_defhlim = IPV6_DEFHLIM; 251 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 252 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 253 int ip6_maxfragpackets = 200; 254 int ip6_log_interval = 5; 255 int ip6_hdrnestlimit = 50; /* appropriate? */ 256 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 257 u_int32_t ip6_flow_seq; 258 int ip6_auto_flowlabel = 1; 259 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 260 int ip6_rr_prune = 5; /* router renumbering prefix 261 * walk list every 5 sec. */ 262 u_int32_t ip6_id = 0UL; 263 int ip6_keepfaith = 0; 264 time_t ip6_log_time = (time_t)0L; 265 266 /* icmp6 */ 267 /* 268 * BSDI4 defines these variables in in_proto.c... 269 * XXX: what if we don't define INET? Should we define pmtu6_expire 270 * or so? (jinmei@kame.net 19990310) 271 */ 272 int pmtu_expire = 60*10; 273 int pmtu_probe = 60*2; 274 275 /* raw IP6 parameters */ 276 /* 277 * Nominal space allocated to a raw ip socket. 278 */ 279 #define RIPV6SNDQ 8192 280 #define RIPV6RCVQ 8192 281 282 u_long rip6_sendspace = RIPV6SNDQ; 283 u_long rip6_recvspace = RIPV6RCVQ; 284 285 /* ICMPV6 parameters */ 286 int icmp6_rediraccept = 1; /* accept and process redirects */ 287 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 288 struct timeval icmp6errratelim = { 0, 0 }; /* no ratelimit */ 289 int icmp6errppslim = 100; /* 100pps */ 290 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 291 292 /* UDP on IP6 parameters */ 293 int udp6_sendspace = 9216; /* really max datagram size */ 294 int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6)); 295 /* 40 1K datagrams */ 296