ip6_var.h revision 1.49.2.1
1 /* $NetBSD: ip6_var.h,v 1.49.2.1 2008/05/18 12:35:35 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 #include <net/route.h> 68 69 /* 70 * IP6 reassembly queue structure. Each fragment 71 * being reassembled is attached to one of these structures. 72 */ 73 struct ip6q { 74 u_int32_t ip6q_head; 75 u_int16_t ip6q_len; 76 u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */ 77 u_int8_t ip6q_hlim; 78 struct ip6asfrag *ip6q_down; 79 struct ip6asfrag *ip6q_up; 80 u_int32_t ip6q_ident; 81 u_int8_t ip6q_arrive; 82 u_int8_t ip6q_ttl; 83 struct in6_addr ip6q_src, ip6q_dst; 84 struct ip6q *ip6q_next; 85 struct ip6q *ip6q_prev; 86 int ip6q_unfrglen; /* len of unfragmentable part */ 87 #ifdef notyet 88 u_char *ip6q_nxtp; 89 #endif 90 int ip6q_nfrag; /* # of fragments */ 91 }; 92 93 struct ip6asfrag { 94 u_int32_t ip6af_head; 95 u_int16_t ip6af_len; 96 u_int8_t ip6af_nxt; 97 u_int8_t ip6af_hlim; 98 /* must not override the above members during reassembling */ 99 struct ip6asfrag *ip6af_down; 100 struct ip6asfrag *ip6af_up; 101 struct mbuf *ip6af_m; 102 int ip6af_offset; /* offset in ip6af_m to next header */ 103 int ip6af_frglen; /* fragmentable part length */ 104 int ip6af_off; /* fragment offset */ 105 u_int16_t ip6af_mff; /* more fragment bit in frag off */ 106 }; 107 108 #define IP6_REASS_MBUF(ip6af) ((ip6af)->ip6af_m) 109 110 struct ip6_moptions { 111 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */ 112 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 113 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 114 LIST_HEAD(, in6_multi_mship) im6o_memberships; 115 }; 116 117 /* 118 * Control options for outgoing packets 119 */ 120 121 /* Routing header related info */ 122 struct ip6po_rhinfo { 123 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 124 struct route ip6po_rhi_route; /* Route to the 1st hop */ 125 }; 126 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 127 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route 128 129 /* Nexthop related info */ 130 struct ip6po_nhinfo { 131 struct sockaddr *ip6po_nhi_nexthop; 132 struct route ip6po_nhi_route; /* Route to the nexthop */ 133 }; 134 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop 135 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route 136 137 struct ip6_pktopts { 138 int ip6po_hlim; /* Hoplimit for outgoing packets */ 139 struct in6_pktinfo *ip6po_pktinfo; /* Outgoing IF/address information */ 140 struct ip6po_nhinfo ip6po_nhinfo; /* Next-hop address information */ 141 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 142 struct ip6_dest *ip6po_dest1; /* Destination options header(1st part) */ 143 struct ip6po_rhinfo ip6po_rhinfo; /* Routing header related info. */ 144 struct ip6_dest *ip6po_dest2; /* Destination options header(2nd part) */ 145 int ip6po_tclass; /* traffic class */ 146 int ip6po_minmtu; /* fragment vs PMTU discovery policy */ 147 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/ 148 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ 149 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ 150 int ip6po_flags; 151 #if 0 /* parameters in this block is obsolete. do not reuse the values. */ 152 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */ 153 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 154 #endif 155 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ 156 }; 157 158 /* 159 * IPv6 statistics. 160 * Each counter is an unsigned 64-bit value. 161 */ 162 #define IP6_STAT_TOTAL 0 /* total packets received */ 163 #define IP6_STAT_TOOSHORT 1 /* packet too short */ 164 #define IP6_STAT_TOOSMALL 2 /* not enough data */ 165 #define IP6_STAT_FRAGMENTS 3 /* fragments received */ 166 #define IP6_STAT_FRAGDROPPED 4 /* frags dropped (dups, out of space) */ 167 #define IP6_STAT_FRAGTIMEOUT 5 /* fragments timed out */ 168 #define IP6_STAT_FRAGOVERFLOW 6 /* fragments that exceed limit */ 169 #define IP6_STAT_FORWARD 7 /* packets forwarded */ 170 #define IP6_STAT_CANTFORWARD 8 /* packets rcvd for uncreachable dst */ 171 #define IP6_STAT_REDIRECTSENT 9 /* packets forwarded on same net */ 172 #define IP6_STAT_DELIVERED 10 /* datagrams delivered to upper level */ 173 #define IP6_STAT_LOCALOUT 11 /* total IP packets generated here */ 174 #define IP6_STAT_ODROPPED 12 /* lost packets due to nobufs, etc. */ 175 #define IP6_STAT_REASSEMBLED 13 /* total packets reassembled ok */ 176 #define IP6_STAT_FRAGMENTED 14 /* datagrams successfully fragmented */ 177 #define IP6_STAT_OFRAGMENTS 15 /* output fragments created */ 178 #define IP6_STAT_CANTFRAG 16 /* don't fragment flag was set, etc. */ 179 #define IP6_STAT_BADOPTIONS 17 /* error in option processing */ 180 #define IP6_STAT_NOROUTE 18 /* packets discarded due to no route */ 181 #define IP6_STAT_BADVERS 19 /* ip6 version != 6 */ 182 #define IP6_STAT_RAWOUT 20 /* total raw ip packets generated */ 183 #define IP6_STAT_BADSCOPE 21 /* scope error */ 184 #define IP6_STAT_NOTMEMBER 22 /* don't join this multicast group */ 185 #define IP6_STAT_NXTHIST 23 /* next header histogram */ 186 /* space for 256 counters */ 187 #define IP6_STAT_M1 279 /* one mbuf */ 188 #define IP6_STAT_M2M 280 /* two or more mbuf */ 189 /* space for 32 counters */ 190 #define IP6_STAT_MEXT1 312 /* one ext mbuf */ 191 #define IP6_STAT_MEXT2M 313 /* two or more ext mbuf */ 192 #define IP6_STAT_EXTHDRTOOLONG 314 /* ext hdr are not contiguous */ 193 #define IP6_STAT_NOGIF 315 /* no match gif found */ 194 #define IP6_STAT_TOOMANYHDR 316 /* discarded due to too many headers */ 195 /* 196 * statistics for improvement of the source address selection 197 * algorithm: 198 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 199 */ 200 #define IP6_STAT_SOURCES_NONE 317 /* number of times that address 201 selection fails */ 202 #define IP6_STAT_SOURCES_SAMEIF 318 /* number of times that an address 203 on the outgoing I/F is chosen */ 204 /* space for 16 counters */ 205 #define IP6_STAT_SOURCES_OTHERIF 334 /* number of times that an address on 206 a non-outgoing I/F is chosen */ 207 /* space for 16 counters */ 208 #define IP6_STAT_SOURCES_SAMESCOPE 350 /* number of times that an address that 209 has the same scope from the dest. 210 is chosen */ 211 /* space for 16 counters */ 212 #define IP6_STAT_SOURCES_OTHERSCOPE 366 /* number of times that an address that 213 has a different scope from the dest. 214 is chosen */ 215 /* space for 16 counters */ 216 #define IP6_STAT_SOURCES_DEPRECATED 382 /* number of times that a deprecated 217 address is chosen */ 218 /* space for 16 counters */ 219 #define IP6_STAT_FORWARD_CACHEHIT 398 220 #define IP6_STAT_FORWARD_CACHEMISS 399 221 #define IP6_STAT_FASTFORWARD 400 /* packets fast forwarded */ 222 #define IP6_STAT_FASTFORWARDFLOWS 401 /* number of fast forward flows */ 223 224 #define IP6_NSTATS 402 225 226 #define IP6FLOW_HASHBITS 6 /* should not be a multiple of 8 */ 227 228 /* 229 * Structure for an IPv6 flow (ip6_fastforward). 230 */ 231 struct ip6flow { 232 LIST_ENTRY(ip6flow) ip6f_list; /* next in active list */ 233 LIST_ENTRY(ip6flow) ip6f_hash; /* next ip6flow in bucket */ 234 struct in6_addr ip6f_dst; /* destination address */ 235 struct in6_addr ip6f_src; /* source address */ 236 struct route ip6f_ro; /* associated route entry */ 237 u_int32_t ip6f_flow; /* flow (tos) */ 238 u_quad_t ip6f_uses; /* number of uses in this period */ 239 u_quad_t ip6f_last_uses; /* number of uses in last period */ 240 u_quad_t ip6f_dropped; /* ENOBUFS returned by if_output */ 241 u_quad_t ip6f_forwarded; /* packets forwarded */ 242 u_int ip6f_timer; /* lifetime timer */ 243 time_t ip6f_start; /* creation time */ 244 }; 245 246 #ifdef _KERNEL 247 /* 248 * Auxiliary attributes of incoming IPv6 packets, which is initialized when we 249 * come into ip6_input(). 250 * XXX do not make it a kitchen sink! 251 */ 252 struct ip6aux { 253 /* ip6.ip6_dst */ 254 struct in6_addr ip6a_src; 255 uint32_t ip6a_scope_id; 256 int ip6a_flags; 257 }; 258 259 /* flags passed to ip6_output as last parameter */ 260 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */ 261 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 262 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 263 264 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 const struct ip6aux *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 *, 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 void ip6_statinc(u_int); 354 355 int route6_input(struct mbuf **, int *, int); 356 357 void frag6_init(void); 358 int frag6_input(struct mbuf **, int *, int); 359 void frag6_slowtimo(void); 360 void frag6_drain(void); 361 362 int ip6flow_init(int); 363 struct ip6flow *ip6flow_reap(int); 364 void ip6flow_create(const struct route *, struct mbuf *); 365 void ip6flow_slowtimo(void); 366 int ip6flow_invalidate_all(int); 367 368 void rip6_init(void); 369 int rip6_input(struct mbuf **, int *, int); 370 void *rip6_ctlinput(int, const struct sockaddr *, void *); 371 int rip6_ctloutput(int, struct socket *, int, int, struct mbuf **); 372 int rip6_output(struct mbuf *, struct socket *, struct sockaddr_in6 *, 373 struct mbuf *); 374 int rip6_usrreq(struct socket *, 375 int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *); 376 377 int dest6_input(struct mbuf **, int *, int); 378 int none_input(struct mbuf **, int *, int); 379 380 struct route; 381 382 struct in6_addr *in6_selectsrc(struct sockaddr_in6 *, 383 struct ip6_pktopts *, struct ip6_moptions *, struct route *, 384 struct in6_addr *, struct ifnet **, int *); 385 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *, 386 struct ip6_moptions *, struct route *, struct ifnet **, 387 struct rtentry **, int); 388 389 u_int32_t ip6_randomid(void); 390 u_int32_t ip6_randomflowlabel(void); 391 #endif /* _KERNEL */ 392 393 #endif /* !_NETINET6_IP6_VAR_H_ */ 394
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