1 /* $OpenBSD: in6_proto.c,v 1.86 2016/06/01 11:11:44 jca 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/if_var.h> 73 #include <net/route.h> 74 #include <net/rtable.h> 75 76 #include <netinet/in.h> 77 #include <netinet/ip.h> 78 #include <netinet/ip_var.h> 79 #include <netinet/in_pcb.h> 80 #include <netinet/ip6.h> 81 #include <netinet6/ip6_var.h> 82 #include <netinet/icmp6.h> 83 84 #include <netinet/tcp.h> 85 #include <netinet/tcp_timer.h> 86 #include <netinet/tcp_var.h> 87 #include <netinet/udp.h> 88 #include <netinet/udp_var.h> 89 #include <netinet/ip_ipsp.h> 90 #include <netinet/ip_ah.h> 91 #include <netinet/ip_esp.h> 92 #include <netinet/ip_ipip.h> 93 94 #ifdef PIM 95 #include <netinet6/pim6_var.h> 96 #endif 97 98 #include <netinet6/in6_var.h> 99 #include <netinet6/nd6.h> 100 #include <netinet6/ip6protosw.h> 101 102 #include "gif.h" 103 #if NGIF > 0 104 #include <netinet/ip_ether.h> 105 #include <net/if_gif.h> 106 #endif 107 108 #include "carp.h" 109 #if NCARP > 0 110 #include <netinet/ip_carp.h> 111 #endif 112 113 #include "pf.h" 114 #if NPF > 0 115 #include <netinet6/ip6_divert.h> 116 #endif 117 118 #include "etherip.h" 119 #if NETHERIP > 0 120 #include <net/if_etherip.h> 121 #endif 122 123 /* 124 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 125 */ 126 u_char ip6_protox[IPPROTO_MAX]; 127 128 struct ip6protosw inet6sw[] = { 129 { 0, &inet6domain, IPPROTO_IPV6, 0, 130 0, 0, 0, 0, 131 0, 132 ip6_init, 0, frag6_slowtimo, frag6_drain, 133 ip6_sysctl, 134 }, 135 { SOCK_DGRAM, &inet6domain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR|PR_SPLICE, 136 udp6_input, 0, udp6_ctlinput, ip6_ctloutput, 137 udp_usrreq, 0, 138 0, 0, 0, 139 udp_sysctl, 140 }, 141 { SOCK_STREAM, &inet6domain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD|PR_ABRTACPTDIS|PR_SPLICE, 142 tcp6_input, 0, tcp6_ctlinput, tcp_ctloutput, 143 tcp_usrreq, 144 0, 0, 0, 0, 145 tcp_sysctl, 146 }, 147 { SOCK_RAW, &inet6domain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 148 rip6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 149 rip6_usrreq, 150 0, 0, 0, 0, rip6_sysctl 151 }, 152 { SOCK_RAW, &inet6domain, IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR, 153 icmp6_input, rip6_output, rip6_ctlinput, rip6_ctloutput, 154 rip6_usrreq, 155 icmp6_init, icmp6_fasttimo, 0, 0, 156 icmp6_sysctl, 157 }, 158 { SOCK_RAW, &inet6domain, IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR, 159 dest6_input, 0, 0, 0, 160 0, 161 0, 0, 0, 0, 162 }, 163 { SOCK_RAW, &inet6domain, IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR, 164 route6_input, 0, 0, 0, 165 0, 166 0, 0, 0, 0, 167 }, 168 { SOCK_RAW, &inet6domain, IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR, 169 frag6_input, 0, 0, 0, 170 0, 171 0, 0, 0, 0, 172 }, 173 #ifdef IPSEC 174 { SOCK_RAW, &inet6domain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 175 ah6_input, rip6_output, 0, rip6_ctloutput, 176 rip6_usrreq, 177 0, 0, 0, 0, 178 ah_sysctl, 179 }, 180 { SOCK_RAW, &inet6domain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 181 esp6_input, rip6_output, 0, rip6_ctloutput, 182 rip6_usrreq, 183 0, 0, 0, 0, 184 esp_sysctl, 185 }, 186 { SOCK_RAW, &inet6domain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 187 ipcomp6_input, rip6_output, 0, rip6_ctloutput, 188 rip6_usrreq, 189 0, 0, 0, 0, 190 ipcomp_sysctl, 191 }, 192 #endif /* IPSEC */ 193 #if NGIF > 0 194 { SOCK_RAW, &inet6domain, IPPROTO_ETHERIP,PR_ATOMIC|PR_ADDR, 195 etherip_input6, rip6_output, 0, rip6_ctloutput, 196 rip6_usrreq, 197 0, 0, 0, 0, etherip_sysctl 198 }, 199 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR, 200 in6_gif_input, rip6_output, 0, rip6_ctloutput, 201 rip6_usrreq, /* XXX */ 202 0, 0, 0, 0, 203 }, 204 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR, 205 in6_gif_input, rip6_output, 0, rip6_ctloutput, 206 rip6_usrreq, /* XXX */ 207 0, 0, 0, 0, 208 }, 209 #else /* NGIF */ 210 { SOCK_RAW, &inet6domain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR, 211 ip4_input6, rip6_output, 0, rip6_ctloutput, 212 rip6_usrreq, /* XXX */ 213 0, 0, 0, 0, ipip_sysctl 214 }, 215 { SOCK_RAW, &inet6domain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR, 216 ip4_input6, rip6_output, 0, rip6_ctloutput, 217 rip6_usrreq, /* XXX */ 218 0, 0, 0, 0, 219 }, 220 #endif /* GIF */ 221 #ifdef PIM 222 { SOCK_RAW, &inet6domain, IPPROTO_PIM, PR_ATOMIC|PR_ADDR, 223 pim6_input, rip6_output, 0, rip6_ctloutput, 224 rip6_usrreq, 225 0, 0, 0, 0, pim6_sysctl 226 }, 227 #endif /* PIM */ 228 #if NCARP > 0 229 { SOCK_RAW, &inet6domain, IPPROTO_CARP, PR_ATOMIC|PR_ADDR, 230 carp6_proto_input, rip6_output, 0, rip6_ctloutput, 231 rip6_usrreq, 232 0, 0, 0, 0, carp_sysctl 233 }, 234 #endif /* NCARP */ 235 #if NPF > 0 236 { SOCK_RAW, &inet6domain, IPPROTO_DIVERT, PR_ATOMIC|PR_ADDR, 237 divert6_input, 0, 0, rip6_ctloutput, 238 divert6_usrreq, 239 divert6_init, 0, 0, 0, divert6_sysctl 240 }, 241 #endif /* NPF > 0 */ 242 #if NETHERIP > 0 243 { SOCK_RAW, &inet6domain, IPPROTO_ETHERIP,PR_ATOMIC|PR_ADDR, 244 ip6_etherip_input, rip6_output, 0, rip6_ctloutput, 245 rip6_usrreq, 246 0, 0, 0, 0, ip_etherip_sysctl 247 }, 248 #endif /* NETHERIP */ 249 /* raw wildcard */ 250 { SOCK_RAW, &inet6domain, 0, PR_ATOMIC|PR_ADDR, 251 rip6_input, rip6_output, 0, rip6_ctloutput, 252 rip6_usrreq, rip6_init, 253 0, 0, 0, 254 }, 255 }; 256 257 struct domain inet6domain = 258 { AF_INET6, "internet6", 0, 0, 0, 259 (struct protosw *)inet6sw, 260 (struct protosw *)&inet6sw[nitems(inet6sw)], 261 sizeof(struct sockaddr_in6), 262 offsetof(struct sockaddr_in6, sin6_addr), 128, 263 in6_domifattach, in6_domifdetach, }; 264 265 /* 266 * Internet configuration info 267 */ 268 int ip6_forwarding = 0; /* no forwarding unless sysctl'd to enable */ 269 int ip6_mforwarding = 0; /* no multicast forwarding unless ... */ 270 int ip6_multipath = 0; /* no using multipath routes unless ... */ 271 int ip6_sendredirects = 1; 272 int ip6_defhlim = IPV6_DEFHLIM; 273 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 274 int ip6_maxfragpackets = 200; 275 int ip6_maxfrags = 200; 276 int ip6_log_interval = 5; 277 int ip6_hdrnestlimit = 10; /* appropriate? */ 278 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 279 int ip6_dad_pending; /* number of currently running DADs */ 280 int ip6_auto_flowlabel = 1; 281 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 282 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */ 283 int ip6_neighborgcthresh = 2048; /* Threshold # of NDP entries for GC */ 284 int ip6_maxifprefixes = 16; /* Max acceptable prefixes via RA per IF */ 285 int ip6_maxifdefrouters = 16; /* Max acceptable def routers via RA */ 286 int ip6_maxdynroutes = 4096; /* Max # of routes created via redirect */ 287 time_t ip6_log_time = (time_t)0L; 288 289 /* raw IP6 parameters */ 290 /* 291 * Nominal space allocated to a raw ip socket. 292 */ 293 #define RIPV6SNDQ 8192 294 #define RIPV6RCVQ 8192 295 296 u_long rip6_sendspace = RIPV6SNDQ; 297 u_long rip6_recvspace = RIPV6RCVQ; 298 299 /* ICMPV6 parameters */ 300 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 301 int icmp6errppslim = 100; /* 100pps */ 302 int ip6_mtudisc_timeout = IPMTUDISCTIMEOUT; 303