ip6_var.h revision 1.37.14.3
1 /* $NetBSD: ip6_var.h,v 1.37.14.3 2007/03/24 14:56:12 yamt Exp $ */ 2 /* $KAME: ip6_var.h,v 1.33 2000/06/11 14:59:20 jinmei 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. 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) ((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 struct in6_pktinfo *ip6po_pktinfo; /* Outgoing IF/address information */ 139 struct ip6po_nhinfo ip6po_nhinfo; /* Next-hop address information */ 140 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 141 struct ip6_dest *ip6po_dest1; /* Destination options header(1st part) */ 142 struct ip6po_rhinfo ip6po_rhinfo; /* Routing header related info. */ 143 struct ip6_dest *ip6po_dest2; /* Destination options header(2nd part) */ 144 int ip6po_tclass; /* traffic class */ 145 int ip6po_minmtu; /* fragment vs PMTU discovery policy */ 146 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/ 147 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ 148 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ 149 int ip6po_flags; 150 #if 0 /* parameters in this block is obsolete. do not reuse the values. */ 151 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */ 152 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 153 #endif 154 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ 155 }; 156 157 struct ip6stat { 158 u_quad_t ip6s_total; /* total packets received */ 159 u_quad_t ip6s_tooshort; /* packet too short */ 160 u_quad_t ip6s_toosmall; /* not enough data */ 161 u_quad_t ip6s_fragments; /* fragments received */ 162 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 163 u_quad_t ip6s_fragtimeout; /* fragments timed out */ 164 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */ 165 u_quad_t ip6s_forward; /* packets forwarded */ 166 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 167 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */ 168 u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/ 169 u_quad_t ip6s_localout; /* total ip packets generated here */ 170 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */ 171 u_quad_t ip6s_reassembled; /* total packets reassembled ok */ 172 u_quad_t ip6s_fragmented; /* datagrams successfully fragmented */ 173 u_quad_t ip6s_ofragments; /* output fragments created */ 174 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 175 u_quad_t ip6s_badoptions; /* error in option processing */ 176 u_quad_t ip6s_noroute; /* packets discarded due to no route */ 177 u_quad_t ip6s_badvers; /* ip6 version != 6 */ 178 u_quad_t ip6s_rawout; /* total raw ip packets generated */ 179 u_quad_t ip6s_badscope; /* scope error */ 180 u_quad_t ip6s_notmember; /* don't join this multicast group */ 181 u_quad_t ip6s_nxthist[256]; /* next header history */ 182 u_quad_t ip6s_m1; /* one mbuf */ 183 u_quad_t ip6s_m2m[32]; /* two or more mbuf */ 184 u_quad_t ip6s_mext1; /* one ext mbuf */ 185 u_quad_t ip6s_mext2m; /* two or more ext mbuf */ 186 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */ 187 u_quad_t ip6s_nogif; /* no match gif found */ 188 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */ 189 190 /* 191 * statistics for improvement of the source address selection 192 * algorithm: 193 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 194 */ 195 /* number of times that address selection fails */ 196 u_quad_t ip6s_sources_none; 197 /* number of times that an address on the outgoing I/F is chosen */ 198 u_quad_t ip6s_sources_sameif[16]; 199 /* number of times that an address on a non-outgoing I/F is chosen */ 200 u_quad_t ip6s_sources_otherif[16]; 201 /* 202 * number of times that an address that has the same scope 203 * from the destination is chosen. 204 */ 205 u_quad_t ip6s_sources_samescope[16]; 206 /* 207 * number of times that an address that has a different scope 208 * from the destination is chosen. 209 */ 210 u_quad_t ip6s_sources_otherscope[16]; 211 /* number of times that an deprecated address is chosen */ 212 u_quad_t ip6s_sources_deprecated[16]; 213 214 u_quad_t ip6s_forward_cachehit; 215 u_quad_t ip6s_forward_cachemiss; 216 217 u_quad_t ip6s_fastforward; /* packets fast forwarded */ 218 u_quad_t ip6s_fastforwardflows; /* number of fast forward flows*/ 219 }; 220 221 #define IP6FLOW_HASHBITS 6 /* should not be a multiple of 8 */ 222 223 /* 224 * Structure for an IPv6 flow (ip6_fastforward). 225 */ 226 struct ip6flow { 227 LIST_ENTRY(ip6flow) ip6f_list; /* next in active list */ 228 LIST_ENTRY(ip6flow) ip6f_hash; /* next ip6flow in bucket */ 229 struct in6_addr ip6f_dst; /* destination address */ 230 struct in6_addr ip6f_src; /* source address */ 231 struct route_in6 ip6f_ro; /* associated route entry */ 232 u_int32_t ip6f_flow; /* flow (tos) */ 233 u_quad_t ip6f_uses; /* number of uses in this period */ 234 u_quad_t ip6f_last_uses; /* number of uses in last period */ 235 u_quad_t ip6f_dropped; /* ENOBUFS returned by if_output */ 236 u_quad_t ip6f_forwarded; /* packets forwarded */ 237 u_int ip6f_timer; /* lifetime timer */ 238 time_t ip6f_start; /* creation time */ 239 }; 240 241 #ifdef _KERNEL 242 /* 243 * Auxiliary attributes of incoming IPv6 packets, which is initialized when we 244 * come into ip6_input(). 245 * XXX do not make it a kitchen sink! 246 */ 247 struct ip6aux { 248 /* ip6.ip6_dst */ 249 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */ 250 }; 251 252 /* flags passed to ip6_output as last parameter */ 253 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */ 254 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 255 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 256 257 #ifdef __NO_STRICT_ALIGNMENT 258 #define IP6_HDR_ALIGNED_P(ip) 1 259 #else 260 #define IP6_HDR_ALIGNED_P(ip) ((((vaddr_t) (ip)) & 3) == 0) 261 #endif 262 263 extern struct ip6stat ip6stat; /* statistics */ 264 extern u_int32_t ip6_id; /* fragment identifier */ 265 extern int ip6_defhlim; /* default hop limit */ 266 extern int ip6_defmcasthlim; /* default multicast hop limit */ 267 extern int ip6_forwarding; /* act as router? */ 268 extern int ip6_sendredirect; /* send ICMPv6 redirect? */ 269 extern int ip6_forward_srcrt; /* forward src-routed? */ 270 extern int ip6_use_deprecated; /* allow deprecated addr as source */ 271 extern int ip6_rr_prune; /* router renumbering prefix 272 * walk list every 5 sec. */ 273 extern int ip6_mcast_pmtu; /* enable pMTU discovery for multicast? */ 274 extern int ip6_v6only; 275 276 extern struct socket *ip6_mrouter; /* multicast routing daemon */ 277 extern int ip6_sendredirects; /* send IP redirects when forwarding? */ 278 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */ 279 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */ 280 extern int ip6_sourcecheck; /* Verify source interface */ 281 extern int ip6_sourcecheck_interval; /* Interval between log messages */ 282 extern int ip6_accept_rtadv; /* Acts as a host not a router */ 283 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */ 284 extern int ip6_log_interval; 285 extern time_t ip6_log_time; 286 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */ 287 extern int ip6_dad_count; /* DupAddrDetectionTransmits */ 288 289 extern int ip6_auto_flowlabel; 290 extern int ip6_auto_linklocal; 291 292 extern int ip6_anonportmin; /* minimum ephemeral port */ 293 extern int ip6_anonportmax; /* maximum ephemeral port */ 294 extern int ip6_lowportmin; /* minimum reserved port */ 295 extern int ip6_lowportmax; /* maximum reserved port */ 296 297 extern int ip6_use_tempaddr; /* whether to use temporary addresses. */ 298 extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses 299 in the source address selection */ 300 extern int ip6_use_defzone; /* whether to use the default scope zone 301 when unspecified */ 302 303 #ifdef GATEWAY 304 extern int ip6_maxflows; /* maximum amount of flows for ip6ff */ 305 extern int ip6_hashsize; /* size of hash table */ 306 #endif 307 308 struct in6pcb; 309 310 int icmp6_ctloutput(int, struct socket *, int, int, struct mbuf **); 311 312 void ip6_init(void); 313 void ip6intr(void); 314 void ip6_input(struct mbuf *); 315 struct in6_ifaddr *ip6_getdstifaddr(struct mbuf *); 316 void ip6_freepcbopts(struct ip6_pktopts *); 317 void ip6_freemoptions(struct ip6_moptions *); 318 int ip6_unknown_opt(u_int8_t *, struct mbuf *, int); 319 u_int8_t *ip6_get_prevhdr(struct mbuf *, int); 320 int ip6_nexthdr(struct mbuf *, int, int, int *); 321 int ip6_lasthdr(struct mbuf *, int, int, int *); 322 323 struct m_tag *ip6_addaux(struct mbuf *); 324 struct m_tag *ip6_findaux(struct mbuf *); 325 void ip6_delaux(struct mbuf *); 326 327 int ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *); 328 int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *, 329 u_int32_t *); 330 void ip6_savecontrol(struct in6pcb *, struct mbuf **, struct ip6_hdr *, 331 struct mbuf *); 332 void ip6_notify_pmtu(struct in6pcb *, const struct sockaddr_in6 *, 333 u_int32_t *); 334 int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); 335 336 void ip6_forward(struct mbuf *, int); 337 338 void ip6_mloopback(struct ifnet *, struct mbuf *, 339 const struct sockaddr_in6 *); 340 int ip6_output(struct mbuf *, struct ip6_pktopts *, 341 struct route_in6 *, int, 342 struct ip6_moptions *, struct socket *, 343 struct ifnet **); 344 int ip6_ctloutput(int, struct socket *, int, int, struct mbuf **); 345 int ip6_raw_ctloutput(int, struct socket *, int, int, struct mbuf **); 346 void ip6_initpktopts(struct ip6_pktopts *); 347 int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *, 348 struct ip6_pktopts *, int, int); 349 void ip6_clearpktopts(struct ip6_pktopts *, int); 350 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int); 351 int ip6_optlen(struct in6pcb *); 352 353 int route6_input(struct mbuf **, int *, int); 354 355 void frag6_init(void); 356 int frag6_input(struct mbuf **, int *, int); 357 void frag6_slowtimo(void); 358 void frag6_drain(void); 359 360 int ip6flow_init(int); 361 struct ip6flow *ip6flow_reap(int); 362 void ip6flow_create(const struct route_in6 *, struct mbuf *); 363 void ip6flow_slowtimo(void); 364 int ip6flow_invalidate_all(int); 365 366 void rip6_init(void); 367 int rip6_input(struct mbuf **, int *, int); 368 void rip6_ctlinput(int, const struct sockaddr *, void *); 369 int rip6_ctloutput(int, struct socket *, int, int, struct mbuf **); 370 int rip6_output(struct mbuf *, ...); 371 int rip6_usrreq(struct socket *, 372 int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *); 373 374 int dest6_input(struct mbuf **, int *, int); 375 int none_input(struct mbuf **, int *, int); 376 377 struct route; 378 379 struct in6_addr *in6_selectsrc(struct sockaddr_in6 *, 380 struct ip6_pktopts *, struct ip6_moptions *, struct route *, 381 struct in6_addr *, struct ifnet **, int *); 382 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *, 383 struct ip6_moptions *, struct route *, struct ifnet **, 384 struct rtentry **, int); 385 386 u_int32_t ip6_randomid(void); 387 u_int32_t ip6_randomflowlabel(void); 388 #endif /* _KERNEL */ 389 390 #endif /* !_NETINET6_IP6_VAR_H_ */ 391
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