ip6_var.h revision 148921
1/* $FreeBSD: head/sys/netinet6/ip6_var.h 148921 2005-08-10 09:13:35Z suz $ */ 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 */ 71struct 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 91struct 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 108struct 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 */ 120struct 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 */ 128struct 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 135struct 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 182struct 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 */ 252struct 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_DADOUTPUT 0x01 /* DAD */ 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 289extern struct ip6stat ip6stat; /* statistics */ 290extern int ip6_defhlim; /* default hop limit */ 291extern int ip6_defmcasthlim; /* default multicast hop limit */ 292extern int ip6_forwarding; /* act as router? */ 293extern int ip6_forward_srcrt; /* forward src-routed? */ 294extern int ip6_gif_hlim; /* Hop limit for gif encap packet */ 295extern int ip6_use_deprecated; /* allow deprecated addr as source */ 296extern int ip6_rr_prune; /* router renumbering prefix 297 * walk list every 5 sec. */ 298extern int ip6_v6only; 299 300extern struct socket *ip6_mrouter; /* multicast routing daemon */ 301extern int ip6_sendredirects; /* send IP redirects when forwarding? */ 302extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */ 303extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */ 304extern int ip6_sourcecheck; /* Verify source interface */ 305extern int ip6_sourcecheck_interval; /* Interval between log messages */ 306extern int ip6_accept_rtadv; /* Acts as a host not a router */ 307extern int ip6_keepfaith; /* Firewall Aided Internet Translator */ 308extern int ip6_log_interval; 309extern time_t ip6_log_time; 310extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */ 311extern int ip6_dad_count; /* DupAddrDetectionTransmits */ 312 313extern int ip6_auto_flowlabel; 314extern int ip6_auto_linklocal; 315 316extern int ip6_anonportmin; /* minimum ephemeral port */ 317extern int ip6_anonportmax; /* maximum ephemeral port */ 318extern int ip6_lowportmin; /* minimum reserved port */ 319extern int ip6_lowportmax; /* maximum reserved port */ 320 321extern int ip6_use_tempaddr; /* whether to use temporary addresses. */ 322extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses 323 in the source address selection */ 324 325extern int ip6_use_defzone; /* whether to use the default scope zone 326 when unspecified */ 327 328extern struct pfil_head inet6_pfil_hook; /* packet filter hooks */ 329#ifdef IPSTEALTH 330extern int ip6stealth; 331#endif 332 333extern struct pr_usrreqs rip6_usrreqs; 334struct sockopt; 335 336struct inpcb; 337 338int icmp6_ctloutput __P((struct socket *, struct sockopt *sopt)); 339 340struct in6_ifaddr; 341void ip6_init __P((void)); 342void ip6_input __P((struct mbuf *)); 343struct in6_ifaddr *ip6_getdstifaddr __P((struct mbuf *)); 344void ip6_freepcbopts __P((struct ip6_pktopts *)); 345void ip6_freemoptions __P((struct ip6_moptions *)); 346int ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int)); 347char * ip6_get_prevhdr __P((struct mbuf *, int)); 348int ip6_nexthdr __P((struct mbuf *, int, int, int *)); 349int ip6_lasthdr __P((struct mbuf *, int, int, int *)); 350 351struct ip6aux *ip6_addaux __P((struct mbuf *)); 352struct ip6aux *ip6_findaux __P((struct mbuf *)); 353void ip6_delaux __P((struct mbuf *)); 354 355int ip6_mforward __P((struct ip6_hdr *, struct ifnet *, struct mbuf *)); 356int ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *, 357 u_int32_t *)); 358void ip6_savecontrol __P((struct inpcb *, struct mbuf *, struct mbuf **)); 359void ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *, 360 u_int32_t *)); 361int ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t)); 362 363void ip6_forward __P((struct mbuf *, int)); 364 365void ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *)); 366int ip6_output __P((struct mbuf *, struct ip6_pktopts *, 367 struct route_in6 *, 368 int, 369 struct ip6_moptions *, struct ifnet **, 370 struct inpcb *)); 371int ip6_ctloutput __P((struct socket *, struct sockopt *)); 372int ip6_raw_ctloutput __P((struct socket *, struct sockopt *)); 373void ip6_initpktopts __P((struct ip6_pktopts *)); 374int ip6_setpktopts __P((struct mbuf *, struct ip6_pktopts *, 375 struct ip6_pktopts *, int, int)); 376void ip6_clearpktopts __P((struct ip6_pktopts *, int)); 377struct ip6_pktopts *ip6_copypktopts __P((struct ip6_pktopts *, int)); 378int ip6_optlen __P((struct inpcb *)); 379 380int route6_input __P((struct mbuf **, int *, int)); 381 382void frag6_init __P((void)); 383int frag6_input __P((struct mbuf **, int *, int)); 384void frag6_slowtimo __P((void)); 385void frag6_drain __P((void)); 386 387void rip6_init __P((void)); 388int rip6_input __P((struct mbuf **, int *, int)); 389void rip6_ctlinput __P((int, struct sockaddr *, void *)); 390int rip6_ctloutput __P((struct socket *, struct sockopt *)); 391int rip6_output __P((struct mbuf *, ...)); 392int rip6_usrreq __P((struct socket *, 393 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *)); 394 395int dest6_input __P((struct mbuf **, int *, int)); 396int none_input __P((struct mbuf **, int *, int)); 397 398struct in6_addr *in6_selectsrc __P((struct sockaddr_in6 *, 399 struct ip6_pktopts *, struct ip6_moptions *, struct route_in6 *, 400 struct in6_addr *, struct ifnet **, int *)); 401int in6_selectroute __P((struct sockaddr_in6 *, struct ip6_pktopts *, 402 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 403 struct rtentry **, int)); 404u_int32_t ip6_randomid __P((void)); 405u_int32_t ip6_randomflowlabel __P((void)); 406#endif /* _KERNEL */ 407 408#endif /* !_NETINET6_IP6_VAR_H_ */ 409