1 /* $FreeBSD$ */ 2 /* $KAME: ip6_var.h,v 1.62 2001/05/03 14:51:48 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 * 4. 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 * @(#)ip_var.h 8.1 (Berkeley) 6/10/93 62 */ 63 64 #ifndef _NETINET6_IP6_VAR_H_ 65 #define _NETINET6_IP6_VAR_H_ 66 67 /* 68 * IP6 reassembly queue structure. Each fragment 69 * being reassembled is attached to one of these structures. 70 */ 71 struct ip6q { 72 u_int32_t ip6q_head; 73 u_int16_t ip6q_len; 74 u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */ 75 u_int8_t ip6q_hlim; 76 struct ip6asfrag *ip6q_down; 77 struct ip6asfrag *ip6q_up; 78 u_int32_t ip6q_ident; 79 u_int8_t ip6q_arrive; 80 u_int8_t ip6q_ttl; 81 struct in6_addr ip6q_src, ip6q_dst; 82 struct ip6q *ip6q_next; 83 struct ip6q *ip6q_prev; 84 int ip6q_unfrglen; /* len of unfragmentable part */ 85 #ifdef notyet 86 u_char *ip6q_nxtp; 87 #endif 88 int ip6q_nfrag; /* # of fragments */ 89 }; 90 91 struct ip6asfrag { 92 u_int32_t ip6af_head; 93 u_int16_t ip6af_len; 94 u_int8_t ip6af_nxt; 95 u_int8_t ip6af_hlim; 96 /* must not override the above members during reassembling */ 97 struct ip6asfrag *ip6af_down; 98 struct ip6asfrag *ip6af_up; 99 struct mbuf *ip6af_m; 100 int ip6af_offset; /* offset in ip6af_m to next header */ 101 int ip6af_frglen; /* fragmentable part length */ 102 int ip6af_off; /* fragment offset */ 103 u_int16_t ip6af_mff; /* more fragment bit in frag off */ 104 }; 105 106 #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m)) 107 108 struct ip6_moptions { 109 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */ 110 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 111 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 112 LIST_HEAD(, in6_multi_mship) im6o_memberships; 113 }; 114 115 /* 116 * Control options for outgoing packets 117 */ 118 119 /* Routing header related info */ 120 struct ip6po_rhinfo { 121 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 122 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */ 123 }; 124 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 125 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route 126 127 /* Nexthop related info */ 128 struct ip6po_nhinfo { 129 struct sockaddr *ip6po_nhi_nexthop; 130 struct route_in6 ip6po_nhi_route; /* Route to the nexthop */ 131 }; 132 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop 133 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route 134 135 struct ip6_pktopts { 136 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */ 137 int ip6po_hlim; /* Hoplimit for outgoing packets */ 138 139 /* Outgoing IF/address information */ 140 struct in6_pktinfo *ip6po_pktinfo; 141 142 /* Next-hop address information */ 143 struct ip6po_nhinfo ip6po_nhinfo; 144 145 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 146 147 /* Destination options header (before a routing header) */ 148 struct ip6_dest *ip6po_dest1; 149 150 /* Routing header related info. */ 151 struct ip6po_rhinfo ip6po_rhinfo; 152 153 /* Destination options header (after a routing header) */ 154 struct ip6_dest *ip6po_dest2; 155 156 int ip6po_tclass; /* traffic class */ 157 158 int ip6po_minmtu; /* fragment vs PMTU discovery policy */ 159 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/ 160 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ 161 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ 162 163 int ip6po_prefer_tempaddr; /* whether temporary addresses are 164 preferred as source address */ 165 #define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */ 166 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */ 167 #define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */ 168 169 int ip6po_flags; 170 #if 0 /* parameters in this block is obsolete. do not reuse the values. */ 171 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */ 172 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 173 #endif 174 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ 175 #define IP6PO_USECOA 0x08 /* use care of address */ 176 }; 177 178 /* 179 * Control options for incoming packets 180 */ 181 182 struct ip6stat { 183 u_quad_t ip6s_total; /* total packets received */ 184 u_quad_t ip6s_tooshort; /* packet too short */ 185 u_quad_t ip6s_toosmall; /* not enough data */ 186 u_quad_t ip6s_fragments; /* fragments received */ 187 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 188 u_quad_t ip6s_fragtimeout; /* fragments timed out */ 189 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */ 190 u_quad_t ip6s_forward; /* packets forwarded */ 191 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 192 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */ 193 u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/ 194 u_quad_t ip6s_localout; /* total ip packets generated here */ 195 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */ 196 u_quad_t ip6s_reassembled; /* total packets reassembled ok */ 197 u_quad_t ip6s_fragmented; /* datagrams successfully fragmented */ 198 u_quad_t ip6s_ofragments; /* output fragments created */ 199 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 200 u_quad_t ip6s_badoptions; /* error in option processing */ 201 u_quad_t ip6s_noroute; /* packets discarded due to no route */ 202 u_quad_t ip6s_badvers; /* ip6 version != 6 */ 203 u_quad_t ip6s_rawout; /* total raw ip packets generated */ 204 u_quad_t ip6s_badscope; /* scope error */ 205 u_quad_t ip6s_notmember; /* don't join this multicast group */ 206 u_quad_t ip6s_nxthist[256]; /* next header history */ 207 u_quad_t ip6s_m1; /* one mbuf */ 208 u_quad_t ip6s_m2m[32]; /* two or more mbuf */ 209 u_quad_t ip6s_mext1; /* one ext mbuf */ 210 u_quad_t ip6s_mext2m; /* two or more ext mbuf */ 211 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */ 212 u_quad_t ip6s_nogif; /* no match gif found */ 213 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */ 214 215 /* 216 * statistics for improvement of the source address selection 217 * algorithm: 218 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 219 */ 220 /* number of times that address selection fails */ 221 u_quad_t ip6s_sources_none; 222 /* number of times that an address on the outgoing I/F is chosen */ 223 u_quad_t ip6s_sources_sameif[16]; 224 /* number of times that an address on a non-outgoing I/F is chosen */ 225 u_quad_t ip6s_sources_otherif[16]; 226 /* 227 * number of times that an address that has the same scope 228 * from the destination is chosen. 229 */ 230 u_quad_t ip6s_sources_samescope[16]; 231 /* 232 * number of times that an address that has a different scope 233 * from the destination is chosen. 234 */ 235 u_quad_t ip6s_sources_otherscope[16]; 236 /* number of times that a deprecated address is chosen */ 237 u_quad_t ip6s_sources_deprecated[16]; 238 239 u_quad_t ip6s_forward_cachehit; 240 u_quad_t ip6s_forward_cachemiss; 241 242 /* number of times that each rule of source selection is applied. */ 243 u_quad_t ip6s_sources_rule[16]; 244 }; 245 246 #ifdef _KERNEL 247 /* 248 * IPv6 onion peeling state. 249 * it will be initialized when we come into ip6_input(). 250 * XXX do not make it a kitchen sink! 251 */ 252 struct ip6aux { 253 u_int32_t ip6a_flags; 254 #define IP6A_SWAP 0x01 /* swapped home/care-of on packet */ 255 #define IP6A_HASEEN 0x02 /* HA was present */ 256 #define IP6A_BRUID 0x04 /* BR Unique Identifier was present */ 257 #define IP6A_RTALERTSEEN 0x08 /* rtalert present */ 258 259 /* ip6.ip6_src */ 260 struct in6_addr ip6a_careof; /* care-of address of the peer */ 261 struct in6_addr ip6a_home; /* home address of the peer */ 262 u_int16_t ip6a_bruid; /* BR unique identifier */ 263 264 /* ip6.ip6_dst */ 265 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */ 266 267 /* rtalert */ 268 u_int16_t ip6a_rtalert; /* rtalert option value */ 269 270 /* 271 * decapsulation history will be here. 272 * with IPsec it may not be accurate. 273 */ 274 }; 275 #endif 276 277 #ifdef _KERNEL 278 /* flags passed to ip6_output as last parameter */ 279 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */ 280 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 281 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 282 283 #ifdef __NO_STRICT_ALIGNMENT 284 #define IP6_HDR_ALIGNED_P(ip) 1 285 #else 286 #define IP6_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0) 287 #endif 288 289 extern struct ip6stat ip6stat; /* statistics */ 290 extern int ip6_defhlim; /* default hop limit */ 291 extern int ip6_defmcasthlim; /* default multicast hop limit */ 292 extern int ip6_forwarding; /* act as router? */ 293 extern int ip6_forward_srcrt; /* forward src-routed? */ 294 extern int ip6_gif_hlim; /* Hop limit for gif encap packet */ 295 extern int ip6_use_deprecated; /* allow deprecated addr as source */ 296 extern int ip6_rr_prune; /* router renumbering prefix 297 * walk list every 5 sec. */ 298 extern int ip6_mcast_pmtu; /* enable pMTU discovery for multicast? */ 299 extern int ip6_v6only; 300 301 extern struct socket *ip6_mrouter; /* multicast routing daemon */ 302 extern int ip6_sendredirects; /* send IP redirects when forwarding? */ 303 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */ 304 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */ 305 extern int ip6_sourcecheck; /* Verify source interface */ 306 extern int ip6_sourcecheck_interval; /* Interval between log messages */ 307 extern int ip6_accept_rtadv; /* Acts as a host not a router */ 308 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */ 309 extern int ip6_log_interval; 310 extern time_t ip6_log_time; 311 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */ 312 extern int ip6_dad_count; /* DupAddrDetectionTransmits */ 313 314 extern int ip6_auto_flowlabel; 315 extern int ip6_auto_linklocal; 316 317 extern int ip6_anonportmin; /* minimum ephemeral port */ 318 extern int ip6_anonportmax; /* maximum ephemeral port */ 319 extern int ip6_lowportmin; /* minimum reserved port */ 320 extern int ip6_lowportmax; /* maximum reserved port */ 321 322 extern int ip6_use_tempaddr; /* whether to use temporary addresses. */ 323 extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses 324 in the source address selection */ 325 326 extern int ip6_use_defzone; /* whether to use the default scope zone 327 when unspecified */ 328 329 extern struct pfil_head inet6_pfil_hook; /* packet filter hooks */ 330 #ifdef IPSTEALTH 331 extern int ip6stealth; 332 #endif 333 334 extern struct pr_usrreqs rip6_usrreqs; 335 struct sockopt; 336 337 struct inpcb; 338 339 int icmp6_ctloutput __P((struct socket *, struct sockopt *sopt)); 340 341 struct in6_ifaddr; 342 void ip6_init __P((void)); 343 void ip6_input __P((struct mbuf *)); 344 struct in6_ifaddr *ip6_getdstifaddr __P((struct mbuf *)); 345 void ip6_freepcbopts __P((struct ip6_pktopts *)); 346 void ip6_freemoptions __P((struct ip6_moptions *)); 347 int ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int)); 348 char * ip6_get_prevhdr __P((struct mbuf *, int)); 349 int ip6_nexthdr __P((struct mbuf *, int, int, int *)); 350 int ip6_lasthdr __P((struct mbuf *, int, int, int *)); 351 352 struct ip6aux *ip6_addaux __P((struct mbuf *)); 353 struct ip6aux *ip6_findaux __P((struct mbuf *)); 354 void ip6_delaux __P((struct mbuf *)); 355 356 int ip6_mforward __P((struct ip6_hdr *, struct ifnet *, struct mbuf *)); 357 int ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *, 358 u_int32_t *)); 359 void ip6_savecontrol __P((struct inpcb *, struct mbuf *, struct mbuf **)); 360 void ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *, 361 u_int32_t *)); 362 int ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t)); 363 364 void ip6_forward __P((struct mbuf *, int)); 365 366 void ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *)); 367 int ip6_output __P((struct mbuf *, struct ip6_pktopts *, 368 struct route_in6 *, 369 int, 370 struct ip6_moptions *, struct ifnet **, 371 struct inpcb *)); 372 int ip6_ctloutput __P((struct socket *, struct sockopt *)); 373 int ip6_raw_ctloutput __P((struct socket *, struct sockopt *)); 374 void ip6_initpktopts __P((struct ip6_pktopts *)); 375 int ip6_setpktopts __P((struct mbuf *, struct ip6_pktopts *, 376 struct ip6_pktopts *, int, int)); 377 void ip6_clearpktopts __P((struct ip6_pktopts *, int)); 378 struct ip6_pktopts *ip6_copypktopts __P((struct ip6_pktopts *, int)); 379 int ip6_optlen __P((struct inpcb *)); 380 381 int route6_input __P((struct mbuf **, int *, int)); 382 383 void frag6_init __P((void)); 384 int frag6_input __P((struct mbuf **, int *, int)); 385 void frag6_slowtimo __P((void)); 386 void frag6_drain __P((void)); 387 388 void rip6_init __P((void)); 389 int rip6_input __P((struct mbuf **, int *, int)); 390 void rip6_ctlinput __P((int, struct sockaddr *, void *)); 391 int rip6_ctloutput __P((struct socket *, struct sockopt *)); 392 int rip6_output __P((struct mbuf *, ...)); 393 int rip6_usrreq __P((struct socket *, 394 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *)); 395 396 int dest6_input __P((struct mbuf **, int *, int)); 397 int none_input __P((struct mbuf **, int *, int)); 398 399 struct in6_addr *in6_selectsrc __P((struct sockaddr_in6 *, 400 struct ip6_pktopts *, struct ip6_moptions *, struct route_in6 *, 401 struct in6_addr *, struct ifnet **, int *)); 402 int in6_selectroute __P((struct sockaddr_in6 *, struct ip6_pktopts *, 403 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 404 struct rtentry **, int)); 405 u_int32_t ip6_randomid __P((void)); 406 u_int32_t ip6_randomflowlabel __P((void)); 407 #endif /* _KERNEL */ 408 409 #endif /* !_NETINET6_IP6_VAR_H_ */ 410