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 * 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 * @(#)ip_var.h 8.1 (Berkeley) 6/10/93 66 */ 67 68 #ifndef _NETINET6_IP6_VAR_H_ 69 #define _NETINET6_IP6_VAR_H_ 70 71 /* 72 * IP6 reassembly queue structure. Each fragment 73 * being reassembled is attached to one of these structures. 74 */ 75 struct ip6q { 76 u_int32_t ip6q_head; 77 u_int16_t ip6q_len; 78 u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */ 79 u_int8_t ip6q_hlim; 80 struct ip6asfrag *ip6q_down; 81 struct ip6asfrag *ip6q_up; 82 u_int32_t ip6q_ident; 83 u_int8_t ip6q_arrive; 84 u_int8_t ip6q_ttl; 85 struct in6_addr ip6q_src, ip6q_dst; 86 struct ip6q *ip6q_next; 87 struct ip6q *ip6q_prev; 88 int ip6q_unfrglen; /* len of unfragmentable part */ 89 #ifdef notyet 90 u_char *ip6q_nxtp; 91 #endif 92 int ip6q_nfrag; /* # of fragments */ 93 }; 94 95 struct ip6asfrag { 96 u_int32_t ip6af_head; 97 u_int16_t ip6af_len; 98 u_int8_t ip6af_nxt; 99 u_int8_t ip6af_hlim; 100 /* must not override the above members during reassembling */ 101 struct ip6asfrag *ip6af_down; 102 struct ip6asfrag *ip6af_up; 103 struct mbuf *ip6af_m; 104 int ip6af_offset; /* offset in ip6af_m to next header */ 105 int ip6af_frglen; /* fragmentable part length */ 106 int ip6af_off; /* fragment offset */ 107 u_int16_t ip6af_mff; /* more fragment bit in frag off */ 108 }; 109 110 #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m)) 111 112 struct ip6_moptions { 113 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */ 114 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 115 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 116 LIST_HEAD(, in6_multi_mship) im6o_memberships; 117 }; 118 119 /* 120 * Control options for outgoing packets 121 */ 122 123 /* Routing header related info */ 124 struct ip6po_rhinfo { 125 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 126 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */ 127 }; 128 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 129 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route 130 131 /* Nexthop related info */ 132 struct ip6po_nhinfo { 133 struct sockaddr *ip6po_nhi_nexthop; 134 struct route_in6 ip6po_nhi_route; /* Route to the nexthop */ 135 }; 136 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop 137 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route 138 139 struct ip6_pktopts { 140 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */ 141 int ip6po_hlim; /* Hoplimit for outgoing packets */ 142 143 /* Outgoing IF/address information */ 144 struct in6_pktinfo *ip6po_pktinfo; 145 146 /* Next-hop address information */ 147 struct ip6po_nhinfo ip6po_nhinfo; 148 149 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 150 151 /* Destination options header (before a routing header) */ 152 struct ip6_dest *ip6po_dest1; 153 154 /* Routing header related info. */ 155 struct ip6po_rhinfo ip6po_rhinfo; 156 157 /* Destination options header (after a routing header) */ 158 struct ip6_dest *ip6po_dest2; 159 160 int ip6po_tclass; /* traffic class */ 161 162 int ip6po_minmtu; /* fragment vs PMTU discovery policy */ 163 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/ 164 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ 165 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ 166 167 int ip6po_prefer_tempaddr; /* whether temporary addresses are 168 preferred as source address */ 169 #define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */ 170 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */ 171 #define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */ 172 173 int ip6po_flags; 174 #if 0 /* parameters in this block is obsolete. do not reuse the values. */ 175 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */ 176 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 177 #endif 178 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ 179 #define IP6PO_USECOA 0x08 /* use care of address */ 180 181 int needfree; /* members dynamically allocated */ 182 }; 183 184 /* 185 * Control options for incoming packets 186 */ 187 188 struct ip6stat { 189 u_quad_t ip6s_total; /* total packets received */ 190 u_quad_t ip6s_tooshort; /* packet too short */ 191 u_quad_t ip6s_toosmall; /* not enough data */ 192 u_quad_t ip6s_fragments; /* fragments received */ 193 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 194 u_quad_t ip6s_fragtimeout; /* fragments timed out */ 195 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */ 196 u_quad_t ip6s_forward; /* packets forwarded */ 197 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 198 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */ 199 u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/ 200 u_quad_t ip6s_localout; /* total ip packets generated here */ 201 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */ 202 u_quad_t ip6s_reassembled; /* total packets reassembled ok */ 203 u_quad_t ip6s_fragmented; /* datagrams successfully fragmented */ 204 u_quad_t ip6s_ofragments; /* output fragments created */ 205 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 206 u_quad_t ip6s_badoptions; /* error in option processing */ 207 u_quad_t ip6s_noroute; /* packets discarded due to no route */ 208 u_quad_t ip6s_badvers; /* ip6 version != 6 */ 209 u_quad_t ip6s_rawout; /* total raw ip packets generated */ 210 u_quad_t ip6s_badscope; /* scope error */ 211 u_quad_t ip6s_notmember; /* don't join this multicast group */ 212 u_quad_t ip6s_nxthist[256]; /* next header history */ 213 u_quad_t ip6s_m1; /* one mbuf */ 214 u_quad_t ip6s_m2m[32]; /* two or more mbuf */ 215 u_quad_t ip6s_mext1; /* one ext mbuf */ 216 u_quad_t ip6s_mext2m; /* two or more ext mbuf */ 217 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */ 218 u_quad_t ip6s_nogif; /* no match gif found */ 219 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */ 220 221 /* 222 * statistics for improvement of the source address selection 223 * algorithm: 224 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 225 */ 226 /* number of times that address selection fails */ 227 u_quad_t ip6s_sources_none; 228 /* number of times that an address on the outgoing I/F is chosen */ 229 u_quad_t ip6s_sources_sameif[16]; 230 /* number of times that an address on a non-outgoing I/F is chosen */ 231 u_quad_t ip6s_sources_otherif[16]; 232 /* 233 * number of times that an address that has the same scope 234 * from the destination is chosen. 235 */ 236 u_quad_t ip6s_sources_samescope[16]; 237 /* 238 * number of times that an address that has a different scope 239 * from the destination is chosen. 240 */ 241 u_quad_t ip6s_sources_otherscope[16]; 242 /* number of times that a deprecated address is chosen */ 243 u_quad_t ip6s_sources_deprecated[16]; 244 245 u_quad_t ip6s_forward_cachehit; 246 u_quad_t ip6s_forward_cachemiss; 247 248 /* number of times that each rule of source selection is applied. */ 249 u_quad_t ip6s_sources_rule[16]; 250 }; 251 252 #ifdef _KERNEL 253 /* 254 * IPv6 onion peeling state. 255 * it will be initialized when we come into ip6_input(). 256 * XXX do not make it a kitchen sink! 257 */ 258 struct ip6aux { 259 u_int32_t ip6a_flags; 260 #define IP6A_SWAP 0x01 /* swapped home/care-of on packet */ 261 #define IP6A_HASEEN 0x02 /* HA was present */ 262 #define IP6A_BRUID 0x04 /* BR Unique Identifier was present */ 263 #define IP6A_RTALERTSEEN 0x08 /* rtalert present */ 264 265 /* ip6.ip6_src */ 266 struct in6_addr ip6a_careof; /* care-of address of the peer */ 267 struct in6_addr ip6a_home; /* home address of the peer */ 268 u_int16_t ip6a_bruid; /* BR unique identifier */ 269 270 /* ip6.ip6_dst */ 271 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */ 272 273 /* rtalert */ 274 u_int16_t ip6a_rtalert; /* rtalert option value */ 275 276 /* 277 * decapsulation history will be here. 278 * with IPsec it may not be accurate. 279 */ 280 }; 281 #endif 282 283 #ifdef _KERNEL 284 /* flags passed to ip6_output as last parameter */ 285 #define IPV6_DADOUTPUT 0x01 /* DAD */ 286 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 287 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 288 289 extern struct ip6stat ip6stat; /* statistics */ 290 #ifndef RANDOM_IP_ID 291 extern u_int32_t ip6_id; /* fragment identifier */ 292 #endif 293 extern int ip6_defhlim; /* default hop limit */ 294 extern int ip6_defmcasthlim; /* default multicast hop limit */ 295 extern int ip6_forwarding; /* act as router? */ 296 extern int ip6_forward_srcrt; /* forward src-routed? */ 297 extern int ip6_gif_hlim; /* Hop limit for gif encap packet */ 298 extern int ip6_use_deprecated; /* allow deprecated addr as source */ 299 extern int ip6_rr_prune; /* router renumbering prefix 300 * walk list every 5 sec. */ 301 extern int ip6_v6only; 302 303 extern struct socket *ip6_mrouter; /* multicast routing daemon */ 304 extern int ip6_sendredirects; /* send IP redirects when forwarding? */ 305 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */ 306 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */ 307 extern int ip6_sourcecheck; /* Verify source interface */ 308 extern int ip6_sourcecheck_interval; /* Interval between log messages */ 309 extern int ip6_accept_rtadv; /* Acts as a host not a router */ 310 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */ 311 extern int ip6_log_interval; 312 extern time_t ip6_log_time; 313 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */ 314 extern int ip6_dad_count; /* DupAddrDetectionTransmits */ 315 316 #ifndef RANDOM_IP_ID 317 extern u_int32_t ip6_flow_seq; 318 #endif 319 extern int ip6_auto_flowlabel; 320 extern int ip6_auto_linklocal; 321 322 extern int ip6_anonportmin; /* minimum ephemeral port */ 323 extern int ip6_anonportmax; /* maximum ephemeral port */ 324 extern int ip6_lowportmin; /* minimum reserved port */ 325 extern int ip6_lowportmax; /* maximum reserved port */ 326 327 extern int ip6_use_tempaddr; /* whether to use temporary addresses. */ 328 extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses 329 in the source address selection */ 330 331 #ifdef PFIL_HOOKS 332 extern struct pfil_head inet6_pfil_hook; 333 #endif 334 335 extern struct pr_usrreqs rip6_usrreqs; 336 struct sockopt; 337 338 struct inpcb; 339 340 int icmp6_ctloutput __P((struct socket *, struct sockopt *sopt)); 341 342 struct in6_ifaddr; 343 void ip6_init __P((void)); 344 void ip6_input __P((struct mbuf *)); 345 struct in6_ifaddr *ip6_getdstifaddr __P((struct mbuf *)); 346 void ip6_freepcbopts __P((struct ip6_pktopts *)); 347 void ip6_freemoptions __P((struct ip6_moptions *)); 348 int ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int)); 349 char * ip6_get_prevhdr __P((struct mbuf *, int)); 350 int ip6_nexthdr __P((struct mbuf *, int, int, int *)); 351 int ip6_lasthdr __P((struct mbuf *, int, int, int *)); 352 353 struct ip6aux *ip6_addaux __P((struct mbuf *)); 354 struct ip6aux *ip6_findaux __P((struct mbuf *)); 355 void ip6_delaux __P((struct mbuf *)); 356 357 int ip6_mforward __P((struct ip6_hdr *, struct ifnet *, struct mbuf *)); 358 int ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *, 359 u_int32_t *)); 360 void ip6_savecontrol __P((struct inpcb *, struct mbuf *, struct mbuf **)); 361 void ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *, 362 u_int32_t *)); 363 int ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t)); 364 365 void ip6_forward __P((struct mbuf *, int)); 366 367 void ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *)); 368 int ip6_output __P((struct mbuf *, struct ip6_pktopts *, 369 struct route_in6 *, 370 int, 371 struct ip6_moptions *, struct ifnet **, 372 struct inpcb *)); 373 int ip6_ctloutput __P((struct socket *, struct sockopt *)); 374 int ip6_raw_ctloutput __P((struct socket *, struct sockopt *)); 375 void init_ip6pktopts __P((struct ip6_pktopts *)); 376 int ip6_setpktoptions __P((struct mbuf *, struct ip6_pktopts *, 377 struct ip6_pktopts *, int, int, int)); 378 void ip6_clearpktopts __P((struct ip6_pktopts *, int)); 379 struct ip6_pktopts *ip6_copypktopts __P((struct ip6_pktopts *, int)); 380 int ip6_optlen __P((struct inpcb *)); 381 382 int route6_input __P((struct mbuf **, int *, int)); 383 384 void frag6_init __P((void)); 385 int frag6_input __P((struct mbuf **, int *, int)); 386 void frag6_slowtimo __P((void)); 387 void frag6_drain __P((void)); 388 389 void rip6_init __P((void)); 390 int rip6_input __P((struct mbuf **, int *, int)); 391 void rip6_ctlinput __P((int, struct sockaddr *, void *)); 392 int rip6_ctloutput __P((struct socket *, struct sockopt *)); 393 int rip6_output __P((struct mbuf *, ...)); 394 int rip6_usrreq __P((struct socket *, 395 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *)); 396 397 int dest6_input __P((struct mbuf **, int *, int)); 398 int none_input __P((struct mbuf **, int *, int)); 399 400 struct in6_addr *in6_selectsrc __P((struct sockaddr_in6 *, 401 struct ip6_pktopts *, struct ip6_moptions *, struct route_in6 *, 402 struct in6_addr *, int *)); 403 int in6_selectroute __P((struct sockaddr_in6 *, struct ip6_pktopts *, 404 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 405 struct rtentry **, int)); 406 #ifdef RANDOM_IP_ID 407 u_int32_t ip6_randomid __P((void)); 408 u_int32_t ip6_randomflowlabel __P((void)); 409 #endif 410 #endif /* _KERNEL */ 411 412 #endif /* !_NETINET6_IP6_VAR_H_ */ 413