Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/netinet6/ip6_var.h
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1 /* $FreeBSD: releng/6.0/sys/netinet6/ip6_var.h 151166 2005-10-09 06:51:11Z ume $ */ 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 int needfree; /* members dynamically allocated */ 178 }; 179 180 /* 181 * Control options for incoming packets 182 */ 183 184 struct ip6stat { 185 u_quad_t ip6s_total; /* total packets received */ 186 u_quad_t ip6s_tooshort; /* packet too short */ 187 u_quad_t ip6s_toosmall; /* not enough data */ 188 u_quad_t ip6s_fragments; /* fragments received */ 189 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 190 u_quad_t ip6s_fragtimeout; /* fragments timed out */ 191 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */ 192 u_quad_t ip6s_forward; /* packets forwarded */ 193 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 194 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */ 195 u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/ 196 u_quad_t ip6s_localout; /* total ip packets generated here */ 197 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */ 198 u_quad_t ip6s_reassembled; /* total packets reassembled ok */ 199 u_quad_t ip6s_fragmented; /* datagrams successfully fragmented */ 200 u_quad_t ip6s_ofragments; /* output fragments created */ 201 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 202 u_quad_t ip6s_badoptions; /* error in option processing */ 203 u_quad_t ip6s_noroute; /* packets discarded due to no route */ 204 u_quad_t ip6s_badvers; /* ip6 version != 6 */ 205 u_quad_t ip6s_rawout; /* total raw ip packets generated */ 206 u_quad_t ip6s_badscope; /* scope error */ 207 u_quad_t ip6s_notmember; /* don't join this multicast group */ 208 u_quad_t ip6s_nxthist[256]; /* next header history */ 209 u_quad_t ip6s_m1; /* one mbuf */ 210 u_quad_t ip6s_m2m[32]; /* two or more mbuf */ 211 u_quad_t ip6s_mext1; /* one ext mbuf */ 212 u_quad_t ip6s_mext2m; /* two or more ext mbuf */ 213 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */ 214 u_quad_t ip6s_nogif; /* no match gif found */ 215 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */ 216 217 /* 218 * statistics for improvement of the source address selection 219 * algorithm: 220 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 221 */ 222 /* number of times that address selection fails */ 223 u_quad_t ip6s_sources_none; 224 /* number of times that an address on the outgoing I/F is chosen */ 225 u_quad_t ip6s_sources_sameif[16]; 226 /* number of times that an address on a non-outgoing I/F is chosen */ 227 u_quad_t ip6s_sources_otherif[16]; 228 /* 229 * number of times that an address that has the same scope 230 * from the destination is chosen. 231 */ 232 u_quad_t ip6s_sources_samescope[16]; 233 /* 234 * number of times that an address that has a different scope 235 * from the destination is chosen. 236 */ 237 u_quad_t ip6s_sources_otherscope[16]; 238 /* number of times that a deprecated address is chosen */ 239 u_quad_t ip6s_sources_deprecated[16]; 240 241 u_quad_t ip6s_forward_cachehit; 242 u_quad_t ip6s_forward_cachemiss; 243 244 /* number of times that each rule of source selection is applied. */ 245 u_quad_t ip6s_sources_rule[16]; 246 }; 247 248 #ifdef _KERNEL 249 /* 250 * IPv6 onion peeling state. 251 * it will be initialized when we come into ip6_input(). 252 * XXX do not make it a kitchen sink! 253 */ 254 struct ip6aux { 255 u_int32_t ip6a_flags; 256 #define IP6A_SWAP 0x01 /* swapped home/care-of on packet */ 257 #define IP6A_HASEEN 0x02 /* HA was present */ 258 #define IP6A_BRUID 0x04 /* BR Unique Identifier was present */ 259 #define IP6A_RTALERTSEEN 0x08 /* rtalert present */ 260 261 /* ip6.ip6_src */ 262 struct in6_addr ip6a_careof; /* care-of address of the peer */ 263 struct in6_addr ip6a_home; /* home address of the peer */ 264 u_int16_t ip6a_bruid; /* BR unique identifier */ 265 266 /* ip6.ip6_dst */ 267 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */ 268 269 /* rtalert */ 270 u_int16_t ip6a_rtalert; /* rtalert option value */ 271 272 /* 273 * decapsulation history will be here. 274 * with IPsec it may not be accurate. 275 */ 276 }; 277 #endif 278 279 #ifdef _KERNEL 280 /* flags passed to ip6_output as last parameter */ 281 #define IPV6_DADOUTPUT 0x01 /* DAD */ 282 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 283 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 284 285 #ifdef __NO_STRICT_ALIGNMENT 286 #define IP6_HDR_ALIGNED_P(ip) 1 287 #else 288 #define IP6_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0) 289 #endif 290 291 extern struct ip6stat ip6stat; /* statistics */ 292 extern int ip6_defhlim; /* default hop limit */ 293 extern int ip6_defmcasthlim; /* default multicast hop limit */ 294 extern int ip6_forwarding; /* act as router? */ 295 extern int ip6_forward_srcrt; /* forward src-routed? */ 296 extern int ip6_gif_hlim; /* Hop limit for gif encap packet */ 297 extern int ip6_use_deprecated; /* allow deprecated addr as source */ 298 extern int ip6_rr_prune; /* router renumbering prefix 299 * walk list every 5 sec. */ 300 extern int ip6_v6only; 301 302 extern struct socket *ip6_mrouter; /* multicast routing daemon */ 303 extern int ip6_sendredirects; /* send IP redirects when forwarding? */ 304 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */ 305 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */ 306 extern int ip6_sourcecheck; /* Verify source interface */ 307 extern int ip6_sourcecheck_interval; /* Interval between log messages */ 308 extern int ip6_accept_rtadv; /* Acts as a host not a router */ 309 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */ 310 extern int ip6_log_interval; 311 extern time_t ip6_log_time; 312 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */ 313 extern int ip6_dad_count; /* DupAddrDetectionTransmits */ 314 315 extern int ip6_auto_flowlabel; 316 extern int ip6_auto_linklocal; 317 318 extern int ip6_anonportmin; /* minimum ephemeral port */ 319 extern int ip6_anonportmax; /* maximum ephemeral port */ 320 extern int ip6_lowportmin; /* minimum reserved port */ 321 extern int ip6_lowportmax; /* maximum reserved port */ 322 323 extern int ip6_use_tempaddr; /* whether to use temporary addresses. */ 324 extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses 325 in the source address selection */ 326 327 extern struct pfil_head inet6_pfil_hook; /* packet filter hooks */ 328 #ifdef IPSTEALTH 329 extern int ip6stealth; 330 #endif 331 332 extern struct pr_usrreqs rip6_usrreqs; 333 struct sockopt; 334 335 struct inpcb; 336 337 int icmp6_ctloutput __P((struct socket *, struct sockopt *sopt)); 338 339 struct in6_ifaddr; 340 void ip6_init __P((void)); 341 void ip6_input __P((struct mbuf *)); 342 struct in6_ifaddr *ip6_getdstifaddr __P((struct mbuf *)); 343 void ip6_freepcbopts __P((struct ip6_pktopts *)); 344 void ip6_freemoptions __P((struct ip6_moptions *)); 345 int ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int)); 346 char * ip6_get_prevhdr __P((struct mbuf *, int)); 347 int ip6_nexthdr __P((struct mbuf *, int, int, int *)); 348 int ip6_lasthdr __P((struct mbuf *, int, int, int *)); 349 350 struct ip6aux *ip6_addaux __P((struct mbuf *)); 351 struct ip6aux *ip6_findaux __P((struct mbuf *)); 352 void ip6_delaux __P((struct mbuf *)); 353 354 int ip6_mforward __P((struct ip6_hdr *, struct ifnet *, struct mbuf *)); 355 int ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *, 356 u_int32_t *)); 357 void ip6_savecontrol __P((struct inpcb *, struct mbuf *, struct mbuf **)); 358 void ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *, 359 u_int32_t *)); 360 int ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t)); 361 362 void ip6_forward __P((struct mbuf *, int)); 363 364 void ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *)); 365 int ip6_output __P((struct mbuf *, struct ip6_pktopts *, 366 struct route_in6 *, 367 int, 368 struct ip6_moptions *, struct ifnet **, 369 struct inpcb *)); 370 int ip6_ctloutput __P((struct socket *, struct sockopt *)); 371 int ip6_raw_ctloutput __P((struct socket *, struct sockopt *)); 372 void ip6_initpktopts __P((struct ip6_pktopts *)); 373 int ip6_setpktopts __P((struct mbuf *, struct ip6_pktopts *, 374 struct ip6_pktopts *, int, int, int)); 375 void ip6_clearpktopts __P((struct ip6_pktopts *, int)); 376 struct ip6_pktopts *ip6_copypktopts __P((struct ip6_pktopts *, int)); 377 int ip6_optlen __P((struct inpcb *)); 378 379 int route6_input __P((struct mbuf **, int *, int)); 380 381 void frag6_init __P((void)); 382 int frag6_input __P((struct mbuf **, int *, int)); 383 void frag6_slowtimo __P((void)); 384 void frag6_drain __P((void)); 385 386 void rip6_init __P((void)); 387 int rip6_input __P((struct mbuf **, int *, int)); 388 void rip6_ctlinput __P((int, struct sockaddr *, void *)); 389 int rip6_ctloutput __P((struct socket *, struct sockopt *)); 390 int rip6_output __P((struct mbuf *, ...)); 391 int rip6_usrreq __P((struct socket *, 392 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *)); 393 394 int dest6_input __P((struct mbuf **, int *, int)); 395 int none_input __P((struct mbuf **, int *, int)); 396 397 struct in6_addr *in6_selectsrc __P((struct sockaddr_in6 *, 398 struct ip6_pktopts *, struct ip6_moptions *, struct route_in6 *, 399 struct in6_addr *, int *)); 400 int in6_selectroute __P((struct sockaddr_in6 *, struct ip6_pktopts *, 401 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 402 struct rtentry **, int)); 403 u_int32_t ip6_randomid __P((void)); 404 u_int32_t ip6_randomflowlabel __P((void)); 405 #endif /* _KERNEL */ 406 407 #endif /* !_NETINET6_IP6_VAR_H_ */
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