ip6_var.h revision 181782
1/*- 2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the project nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $KAME: ip6_var.h,v 1.62 2001/05/03 14:51:48 itojun Exp $ 30 */ 31 32/*- 33 * Copyright (c) 1982, 1986, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 4. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)ip_var.h 8.1 (Berkeley) 6/10/93 61 * $FreeBSD: head/sys/netinet6/ip6_var.h 181782 2008-08-16 06:39:18Z bz $ 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 struct ip6asfrag *ip6q_down; 73 struct ip6asfrag *ip6q_up; 74 u_int32_t ip6q_ident; 75 u_int8_t ip6q_nxt; 76 u_int8_t ip6q_ecn; 77 u_int8_t ip6q_ttl; 78 struct in6_addr ip6q_src, ip6q_dst; 79 struct ip6q *ip6q_next; 80 struct ip6q *ip6q_prev; 81 int ip6q_unfrglen; /* len of unfragmentable part */ 82#ifdef notyet 83 u_char *ip6q_nxtp; 84#endif 85 int ip6q_nfrag; /* # of fragments */ 86}; 87 88struct ip6asfrag { 89 struct ip6asfrag *ip6af_down; 90 struct ip6asfrag *ip6af_up; 91 struct mbuf *ip6af_m; 92 int ip6af_offset; /* offset in ip6af_m to next header */ 93 int ip6af_frglen; /* fragmentable part length */ 94 int ip6af_off; /* fragment offset */ 95 u_int16_t ip6af_mff; /* more fragment bit in frag off */ 96}; 97 98#define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m)) 99 100struct ip6_moptions { 101 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */ 102 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 103 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 104 LIST_HEAD(, in6_multi_mship) im6o_memberships; 105}; 106 107/* 108 * Control options for outgoing packets 109 */ 110 111/* Routing header related info */ 112struct ip6po_rhinfo { 113 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 114 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */ 115}; 116#define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 117#define ip6po_route ip6po_rhinfo.ip6po_rhi_route 118 119/* Nexthop related info */ 120struct ip6po_nhinfo { 121 struct sockaddr *ip6po_nhi_nexthop; 122 struct route_in6 ip6po_nhi_route; /* Route to the nexthop */ 123}; 124#define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop 125#define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route 126 127struct ip6_pktopts { 128 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */ 129 int ip6po_hlim; /* Hoplimit for outgoing packets */ 130 131 /* Outgoing IF/address information */ 132 struct in6_pktinfo *ip6po_pktinfo; 133 134 /* Next-hop address information */ 135 struct ip6po_nhinfo ip6po_nhinfo; 136 137 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 138 139 /* Destination options header (before a routing header) */ 140 struct ip6_dest *ip6po_dest1; 141 142 /* Routing header related info. */ 143 struct ip6po_rhinfo ip6po_rhinfo; 144 145 /* Destination options header (after a routing header) */ 146 struct ip6_dest *ip6po_dest2; 147 148 int ip6po_tclass; /* traffic class */ 149 150 int ip6po_minmtu; /* fragment vs PMTU discovery policy */ 151#define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/ 152#define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ 153#define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ 154 155 int ip6po_prefer_tempaddr; /* whether temporary addresses are 156 preferred as source address */ 157#define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */ 158#define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */ 159#define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */ 160 161 int ip6po_flags; 162#if 0 /* parameters in this block is obsolete. do not reuse the values. */ 163#define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */ 164#define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 165#endif 166#define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ 167#define IP6PO_USECOA 0x08 /* use care of address */ 168}; 169 170/* 171 * Control options for incoming packets 172 */ 173 174struct ip6stat { 175 u_quad_t ip6s_total; /* total packets received */ 176 u_quad_t ip6s_tooshort; /* packet too short */ 177 u_quad_t ip6s_toosmall; /* not enough data */ 178 u_quad_t ip6s_fragments; /* fragments received */ 179 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 180 u_quad_t ip6s_fragtimeout; /* fragments timed out */ 181 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */ 182 u_quad_t ip6s_forward; /* packets forwarded */ 183 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 184 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */ 185 u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/ 186 u_quad_t ip6s_localout; /* total ip packets generated here */ 187 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */ 188 u_quad_t ip6s_reassembled; /* total packets reassembled ok */ 189 u_quad_t ip6s_fragmented; /* datagrams successfully fragmented */ 190 u_quad_t ip6s_ofragments; /* output fragments created */ 191 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 192 u_quad_t ip6s_badoptions; /* error in option processing */ 193 u_quad_t ip6s_noroute; /* packets discarded due to no route */ 194 u_quad_t ip6s_badvers; /* ip6 version != 6 */ 195 u_quad_t ip6s_rawout; /* total raw ip packets generated */ 196 u_quad_t ip6s_badscope; /* scope error */ 197 u_quad_t ip6s_notmember; /* don't join this multicast group */ 198 u_quad_t ip6s_nxthist[256]; /* next header history */ 199 u_quad_t ip6s_m1; /* one mbuf */ 200 u_quad_t ip6s_m2m[32]; /* two or more mbuf */ 201 u_quad_t ip6s_mext1; /* one ext mbuf */ 202 u_quad_t ip6s_mext2m; /* two or more ext mbuf */ 203 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */ 204 u_quad_t ip6s_nogif; /* no match gif found */ 205 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */ 206 207 /* 208 * statistics for improvement of the source address selection 209 * algorithm: 210 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 211 */ 212 /* number of times that address selection fails */ 213 u_quad_t ip6s_sources_none; 214 /* number of times that an address on the outgoing I/F is chosen */ 215 u_quad_t ip6s_sources_sameif[16]; 216 /* number of times that an address on a non-outgoing I/F is chosen */ 217 u_quad_t ip6s_sources_otherif[16]; 218 /* 219 * number of times that an address that has the same scope 220 * from the destination is chosen. 221 */ 222 u_quad_t ip6s_sources_samescope[16]; 223 /* 224 * number of times that an address that has a different scope 225 * from the destination is chosen. 226 */ 227 u_quad_t ip6s_sources_otherscope[16]; 228 /* number of times that a deprecated address is chosen */ 229 u_quad_t ip6s_sources_deprecated[16]; 230 231 u_quad_t ip6s_forward_cachehit; 232 u_quad_t ip6s_forward_cachemiss; 233 234 /* number of times that each rule of source selection is applied. */ 235 u_quad_t ip6s_sources_rule[16]; 236}; 237 238#ifdef _KERNEL 239/* 240 * IPv6 onion peeling state. 241 * it will be initialized when we come into ip6_input(). 242 * XXX do not make it a kitchen sink! 243 */ 244struct ip6aux { 245 u_int32_t ip6a_flags; 246#define IP6A_SWAP 0x01 /* swapped home/care-of on packet */ 247#define IP6A_HASEEN 0x02 /* HA was present */ 248#define IP6A_BRUID 0x04 /* BR Unique Identifier was present */ 249#define IP6A_RTALERTSEEN 0x08 /* rtalert present */ 250 251 /* ip6.ip6_src */ 252 struct in6_addr ip6a_careof; /* care-of address of the peer */ 253 struct in6_addr ip6a_home; /* home address of the peer */ 254 u_int16_t ip6a_bruid; /* BR unique identifier */ 255 256 /* ip6.ip6_dst */ 257 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */ 258 259 /* rtalert */ 260 u_int16_t ip6a_rtalert; /* rtalert option value */ 261 262 /* 263 * decapsulation history will be here. 264 * with IPsec it may not be accurate. 265 */ 266}; 267#endif 268 269#ifdef _KERNEL 270/* flags passed to ip6_output as last parameter */ 271#define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */ 272#define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 273#define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 274 275#ifdef __NO_STRICT_ALIGNMENT 276#define IP6_HDR_ALIGNED_P(ip) 1 277#else 278#define IP6_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0) 279#endif 280 281extern struct ip6stat ip6stat; /* statistics */ 282extern int ip6_defhlim; /* default hop limit */ 283extern int ip6_defmcasthlim; /* default multicast hop limit */ 284extern int ip6_forwarding; /* act as router? */ 285extern int ip6_forward_srcrt; /* forward src-routed? */ 286extern int ip6_gif_hlim; /* Hop limit for gif encap packet */ 287extern int ip6_use_deprecated; /* allow deprecated addr as source */ 288extern int ip6_rr_prune; /* router renumbering prefix 289 * walk list every 5 sec. */ 290extern int ip6_mcast_pmtu; /* enable pMTU discovery for multicast? */ 291extern int ip6_v6only; 292 293extern struct socket *ip6_mrouter; /* multicast routing daemon */ 294extern int ip6_sendredirects; /* send IP redirects when forwarding? */ 295extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */ 296extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */ 297extern int ip6_sourcecheck; /* Verify source interface */ 298extern int ip6_sourcecheck_interval; /* Interval between log messages */ 299extern int ip6_accept_rtadv; /* Acts as a host not a router */ 300extern int ip6_keepfaith; /* Firewall Aided Internet Translator */ 301extern int ip6_log_interval; 302extern time_t ip6_log_time; 303extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */ 304extern int ip6_dad_count; /* DupAddrDetectionTransmits */ 305 306extern int ip6_auto_flowlabel; 307extern int ip6_auto_linklocal; 308 309extern int ip6_anonportmin; /* minimum ephemeral port */ 310extern int ip6_anonportmax; /* maximum ephemeral port */ 311extern int ip6_lowportmin; /* minimum reserved port */ 312extern int ip6_lowportmax; /* maximum reserved port */ 313 314extern int ip6_use_tempaddr; /* whether to use temporary addresses. */ 315extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses 316 in the source address selection */ 317 318extern int ip6_use_defzone; /* whether to use the default scope zone 319 when unspecified */ 320 321extern struct pfil_head inet6_pfil_hook; /* packet filter hooks */ 322#ifdef IPSTEALTH 323extern int ip6stealth; 324#endif 325 326extern struct pr_usrreqs rip6_usrreqs; 327struct sockopt; 328 329struct inpcb; 330 331int icmp6_ctloutput __P((struct socket *, struct sockopt *sopt)); 332 333struct in6_ifaddr; 334void ip6_init __P((void)); 335void ip6_input __P((struct mbuf *)); 336struct in6_ifaddr *ip6_getdstifaddr __P((struct mbuf *)); 337void ip6_freepcbopts __P((struct ip6_pktopts *)); 338void ip6_freemoptions __P((struct ip6_moptions *)); 339int ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int)); 340char * ip6_get_prevhdr __P((struct mbuf *, int)); 341int ip6_nexthdr __P((struct mbuf *, int, int, int *)); 342int ip6_lasthdr __P((struct mbuf *, int, int, int *)); 343 344struct ip6aux *ip6_addaux __P((struct mbuf *)); 345struct ip6aux *ip6_findaux __P((struct mbuf *)); 346void ip6_delaux __P((struct mbuf *)); 347 348extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, 349 struct mbuf *); 350 351int ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *, 352 u_int32_t *)); 353struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *, 354 struct mbuf **, int *); 355void ip6_savecontrol __P((struct inpcb *, struct mbuf *, struct mbuf **)); 356void ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *, 357 u_int32_t *)); 358int ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t)); 359 360void ip6_forward __P((struct mbuf *, int)); 361 362void ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *)); 363int ip6_output __P((struct mbuf *, struct ip6_pktopts *, 364 struct route_in6 *, 365 int, 366 struct ip6_moptions *, struct ifnet **, 367 struct inpcb *)); 368int ip6_ctloutput __P((struct socket *, struct sockopt *)); 369int ip6_raw_ctloutput __P((struct socket *, struct sockopt *)); 370void ip6_initpktopts __P((struct ip6_pktopts *)); 371int ip6_setpktopts __P((struct mbuf *, struct ip6_pktopts *, 372 struct ip6_pktopts *, struct ucred *, int)); 373void ip6_clearpktopts __P((struct ip6_pktopts *, int)); 374struct ip6_pktopts *ip6_copypktopts __P((struct ip6_pktopts *, int)); 375int ip6_optlen __P((struct inpcb *)); 376 377int route6_input __P((struct mbuf **, int *, int)); 378 379void frag6_init __P((void)); 380int frag6_input __P((struct mbuf **, int *, int)); 381void frag6_slowtimo __P((void)); 382void frag6_drain __P((void)); 383 384void rip6_init __P((void)); 385int rip6_input __P((struct mbuf **, int *, int)); 386void rip6_ctlinput __P((int, struct sockaddr *, void *)); 387int rip6_ctloutput __P((struct socket *, struct sockopt *)); 388int rip6_output __P((struct mbuf *, ...)); 389int rip6_usrreq __P((struct socket *, 390 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *)); 391 392int dest6_input __P((struct mbuf **, int *, int)); 393int none_input __P((struct mbuf **, int *, int)); 394 395struct in6_addr *in6_selectsrc __P((struct sockaddr_in6 *, struct ip6_pktopts *, 396 struct inpcb *inp, struct route_in6 *, struct ucred *cred, 397 struct ifnet **, int *)); 398int in6_selectroute __P((struct sockaddr_in6 *, struct ip6_pktopts *, 399 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 400 struct rtentry **, int)); 401u_int32_t ip6_randomid __P((void)); 402u_int32_t ip6_randomflowlabel __P((void)); 403#endif /* _KERNEL */ 404 405#endif /* !_NETINET6_IP6_VAR_H_ */ 406