ip6_var.h revision 1.74.6.3
1 /* $NetBSD: ip6_var.h,v 1.74.6.3 2018/09/27 15:57:07 martin 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 <sys/socketvar.h> 68 #include <net/route.h> 69 70 /* 71 * IP6 reassembly queue structure. Each fragment 72 * being reassembled is attached to one of these structures. 73 */ 74 struct ip6q { 75 u_int32_t ip6q_head; 76 u_int16_t ip6q_len; 77 u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */ 78 u_int8_t ip6q_hlim; 79 struct ip6asfrag *ip6q_down; 80 struct ip6asfrag *ip6q_up; 81 u_int32_t ip6q_ident; 82 u_int8_t ip6q_arrive; 83 u_int8_t ip6q_ttl; 84 struct in6_addr ip6q_src, ip6q_dst; 85 struct ip6q *ip6q_next; 86 struct ip6q *ip6q_prev; 87 int ip6q_unfrglen; /* len of unfragmentable part */ 88 #ifdef notyet 89 u_char *ip6q_nxtp; 90 #endif 91 int ip6q_nfrag; /* # of fragments */ 92 int ip6q_ipsec; /* IPsec flags */ 93 }; 94 95 struct ip6asfrag { 96 u_int32_t ip6af_head; 97 u_int16_t ip6af_len; 98 u_int8_t ip6af_nxt; 99 u_int8_t ip6af_hlim; 100 /* must not override the above members during reassembling */ 101 struct ip6asfrag *ip6af_down; 102 struct ip6asfrag *ip6af_up; 103 struct mbuf *ip6af_m; 104 int ip6af_offset; /* offset in ip6af_m to next header */ 105 int ip6af_frglen; /* fragmentable part length */ 106 int ip6af_off; /* fragment offset */ 107 u_int16_t ip6af_mff; /* more fragment bit in frag off */ 108 }; 109 110 #define IP6_REASS_MBUF(ip6af) ((ip6af)->ip6af_m) 111 112 struct ip6_moptions { 113 if_index_t im6o_multicast_if_index; /* I/F for outgoing multicasts */ 114 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 115 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 116 LIST_HEAD(, in6_multi_mship) im6o_memberships; 117 }; 118 119 /* 120 * Control options for outgoing packets 121 */ 122 123 /* Routing header related info */ 124 struct ip6po_rhinfo { 125 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 126 struct route ip6po_rhi_route; /* Route to the 1st hop */ 127 }; 128 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 129 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route 130 131 /* Nexthop related info */ 132 struct ip6po_nhinfo { 133 struct sockaddr *ip6po_nhi_nexthop; 134 struct route ip6po_nhi_route; /* Route to the nexthop */ 135 }; 136 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop 137 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route 138 139 struct ip6_pktopts { 140 int ip6po_hlim; /* Hoplimit for outgoing packets */ 141 struct in6_pktinfo *ip6po_pktinfo; /* Outgoing IF/address information */ 142 struct ip6po_nhinfo ip6po_nhinfo; /* Next-hop address information */ 143 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 144 struct ip6_dest *ip6po_dest1; /* Destination options header(1st part) */ 145 struct ip6po_rhinfo ip6po_rhinfo; /* Routing header related info. */ 146 struct ip6_dest *ip6po_dest2; /* Destination options header(2nd part) */ 147 int ip6po_tclass; /* traffic class */ 148 int ip6po_minmtu; /* fragment vs PMTU discovery policy */ 149 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/ 150 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ 151 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ 152 int ip6po_prefer_tempaddr; /* whether temporary addresses are 153 * preferred as source address */ 154 #define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */ 155 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */ 156 #define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */ 157 int ip6po_flags; 158 #if 0 /* parameters in this block is obsolete. do not reuse the values. */ 159 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */ 160 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 161 #endif 162 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ 163 }; 164 165 /* 166 * IPv6 statistics. 167 * Each counter is an unsigned 64-bit value. 168 */ 169 #define IP6_STAT_TOTAL 0 /* total packets received */ 170 #define IP6_STAT_TOOSHORT 1 /* packet too short */ 171 #define IP6_STAT_TOOSMALL 2 /* not enough data */ 172 #define IP6_STAT_FRAGMENTS 3 /* fragments received */ 173 #define IP6_STAT_FRAGDROPPED 4 /* frags dropped (dups, out of space) */ 174 #define IP6_STAT_FRAGTIMEOUT 5 /* fragments timed out */ 175 #define IP6_STAT_FRAGOVERFLOW 6 /* fragments that exceed limit */ 176 #define IP6_STAT_FORWARD 7 /* packets forwarded */ 177 #define IP6_STAT_CANTFORWARD 8 /* packets rcvd for uncreachable dst */ 178 #define IP6_STAT_REDIRECTSENT 9 /* packets forwarded on same net */ 179 #define IP6_STAT_DELIVERED 10 /* datagrams delivered to upper level */ 180 #define IP6_STAT_LOCALOUT 11 /* total IP packets generated here */ 181 #define IP6_STAT_ODROPPED 12 /* lost packets due to nobufs, etc. */ 182 #define IP6_STAT_REASSEMBLED 13 /* total packets reassembled ok */ 183 #define IP6_STAT_FRAGMENTED 14 /* datagrams successfully fragmented */ 184 #define IP6_STAT_OFRAGMENTS 15 /* output fragments created */ 185 #define IP6_STAT_CANTFRAG 16 /* don't fragment flag was set, etc. */ 186 #define IP6_STAT_BADOPTIONS 17 /* error in option processing */ 187 #define IP6_STAT_NOROUTE 18 /* packets discarded due to no route */ 188 #define IP6_STAT_BADVERS 19 /* ip6 version != 6 */ 189 #define IP6_STAT_RAWOUT 20 /* total raw ip packets generated */ 190 #define IP6_STAT_BADSCOPE 21 /* scope error */ 191 #define IP6_STAT_NOTMEMBER 22 /* don't join this multicast group */ 192 #define IP6_STAT_NXTHIST 23 /* next header histogram */ 193 /* space for 256 counters */ 194 #define IP6_STAT_M1 279 /* one mbuf */ 195 #define IP6_STAT_M2M 280 /* two or more mbuf */ 196 /* space for 32 counters */ 197 #define IP6_STAT_MEXT1 312 /* one ext mbuf */ 198 #define IP6_STAT_MEXT2M 313 /* two or more ext mbuf */ 199 #define IP6_STAT_EXTHDRTOOLONG 314 /* ext hdr are not contiguous */ 200 #define IP6_STAT_NOGIF 315 /* no match gif found */ 201 #define IP6_STAT_TOOMANYHDR 316 /* discarded due to too many headers */ 202 /* 203 * statistics for improvement of the source address selection 204 * algorithm: 205 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 206 */ 207 #define IP6_STAT_SOURCES_NONE 317 /* number of times that address 208 selection fails */ 209 #define IP6_STAT_SOURCES_SAMEIF 318 /* number of times that an address 210 on the outgoing I/F is chosen */ 211 /* space for 16 counters */ 212 #define IP6_STAT_SOURCES_OTHERIF 334 /* number of times that an address on 213 a non-outgoing I/F is chosen */ 214 /* space for 16 counters */ 215 #define IP6_STAT_SOURCES_SAMESCOPE 350 /* number of times that an address that 216 has the same scope from the dest. 217 is chosen */ 218 /* space for 16 counters */ 219 #define IP6_STAT_SOURCES_OTHERSCOPE 366 /* number of times that an address that 220 has a different scope from the dest. 221 is chosen */ 222 /* space for 16 counters */ 223 #define IP6_STAT_SOURCES_DEPRECATED 382 /* number of times that a deprecated 224 address is chosen */ 225 /* space for 16 counters */ 226 #define IP6_STAT_FORWARD_CACHEHIT 398 227 #define IP6_STAT_FORWARD_CACHEMISS 399 228 #define IP6_STAT_FASTFORWARD 400 /* packets fast forwarded */ 229 #define IP6_STAT_FASTFORWARDFLOWS 401 /* number of fast forward flows */ 230 #define IP6_STAT_NOIPSEC 402 /* no match ipsec(4) found */ 231 232 #define IP6_NSTATS 403 233 234 #define IP6FLOW_HASHBITS 6 /* should not be a multiple of 8 */ 235 236 /* 237 * Structure for an IPv6 flow (ip6_fastforward). 238 */ 239 struct ip6flow { 240 TAILQ_ENTRY(ip6flow) ip6f_list; /* next in active list */ 241 TAILQ_ENTRY(ip6flow) ip6f_hash; /* next ip6flow in bucket */ 242 size_t ip6f_hashidx; /* own hash index of ipflowtable[] */ 243 struct in6_addr ip6f_dst; /* destination address */ 244 struct in6_addr ip6f_src; /* source address */ 245 struct route ip6f_ro; /* associated route entry */ 246 u_int32_t ip6f_flow; /* flow (tos) */ 247 u_quad_t ip6f_uses; /* number of uses in this period */ 248 u_quad_t ip6f_last_uses; /* number of uses in last period */ 249 u_quad_t ip6f_dropped; /* ENOBUFS returned by if_output */ 250 u_quad_t ip6f_forwarded; /* packets forwarded */ 251 u_int ip6f_timer; /* lifetime timer */ 252 }; 253 254 #ifdef _KERNEL 255 /* 256 * Auxiliary attributes of incoming IPv6 packets, which is initialized when we 257 * come into ip6_input(). 258 * XXX do not make it a kitchen sink! 259 */ 260 struct ip6aux { 261 /* ip6.ip6_dst */ 262 struct in6_addr ip6a_src; 263 uint32_t ip6a_scope_id; 264 int ip6a_flags; 265 }; 266 267 /* flags passed to ip6_output as last parameter */ 268 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */ 269 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 270 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 271 272 extern u_int32_t ip6_id; /* fragment identifier */ 273 extern int ip6_defhlim; /* default hop limit */ 274 extern int ip6_defmcasthlim; /* default multicast hop limit */ 275 extern int ip6_forwarding; /* act as router? */ 276 extern int ip6_sendredirect; /* send ICMPv6 redirect? */ 277 extern int ip6_forward_srcrt; /* forward src-routed? */ 278 extern int ip6_use_deprecated; /* allow deprecated addr as source */ 279 extern int ip6_rr_prune; /* router renumbering prefix 280 * walk list every 5 sec. */ 281 extern int ip6_mcast_pmtu; /* enable pMTU discovery for multicast? */ 282 extern int ip6_v6only; 283 extern int ip6_neighborgcthresh; /* Threshold # of NDP entries for GC */ 284 extern int ip6_maxifprefixes; /* Max acceptable prefixes via RA per IF */ 285 extern int ip6_maxifdefrouters; /* Max acceptable def routers via RA */ 286 extern int ip6_maxdynroutes; /* Max # of routes created via redirect */ 287 288 289 extern struct socket *ip6_mrouter; /* multicast routing daemon */ 290 extern int ip6_sendredirects; /* send IP redirects when forwarding? */ 291 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */ 292 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */ 293 extern int ip6_sourcecheck; /* Verify source interface */ 294 extern int ip6_sourcecheck_interval; /* Interval between log messages */ 295 extern int ip6_accept_rtadv; /* Acts as a host not a router */ 296 extern int ip6_rtadv_maxroutes; /* maximum number of routes via rtadv */ 297 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */ 298 extern int ip6_log_interval; 299 extern time_t ip6_log_time; 300 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */ 301 extern int ip6_dad_count; /* DupAddrDetectionTransmits */ 302 303 extern int ip6_auto_flowlabel; 304 extern int ip6_auto_linklocal; 305 306 extern int ip6_anonportmin; /* minimum ephemeral port */ 307 extern int ip6_anonportmax; /* maximum ephemeral port */ 308 extern int ip6_lowportmin; /* minimum reserved port */ 309 extern int ip6_lowportmax; /* maximum reserved port */ 310 311 extern int ip6_use_tempaddr; /* whether to use temporary addresses. */ 312 extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses 313 in the source address selection */ 314 extern int ip6_use_defzone; /* whether to use the default scope zone 315 when unspecified */ 316 317 #ifdef GATEWAY 318 extern int ip6_maxflows; /* maximum amount of flows for ip6ff */ 319 extern int ip6_hashsize; /* size of hash table */ 320 #endif 321 322 struct in6pcb; 323 extern const struct pr_usrreqs rip6_usrreqs; 324 325 int icmp6_ctloutput(int, struct socket *, struct sockopt *); 326 327 struct mbuf; 328 void ip6_init(void); 329 void ip6_input(struct mbuf *, struct ifnet *); 330 const struct ip6aux *ip6_getdstifaddr(struct mbuf *); 331 void ip6_freepcbopts(struct ip6_pktopts *); 332 void ip6_freemoptions(struct ip6_moptions *); 333 int ip6_unknown_opt(u_int8_t *, struct mbuf *, int); 334 int ip6_get_prevhdr(struct mbuf *, int); 335 int ip6_nexthdr(struct mbuf *, int, int, int *); 336 int ip6_lasthdr(struct mbuf *, int, int, int *); 337 338 struct m_tag *ip6_addaux(struct mbuf *); 339 struct m_tag *ip6_findaux(struct mbuf *); 340 void ip6_delaux(struct mbuf *); 341 struct ip6_hdr; 342 int ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *); 343 int ip6_hopopts_input(u_int32_t *, u_int32_t *, struct mbuf **, int *); 344 void ip6_savecontrol(struct in6pcb *, struct mbuf **, struct ip6_hdr *, 345 struct mbuf *); 346 void ip6_notify_pmtu(struct in6pcb *, const struct sockaddr_in6 *, 347 u_int32_t *); 348 int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); 349 350 void ip6_forward(struct mbuf *, int); 351 352 void ip6_mloopback(struct ifnet *, struct mbuf *, 353 const struct sockaddr_in6 *); 354 int ip6_output(struct mbuf *, struct ip6_pktopts *, struct route *, int, 355 struct ip6_moptions *, struct in6pcb *, struct ifnet **); 356 int ip6_if_output(struct ifnet * const, struct ifnet * const, 357 struct mbuf * const, 358 const struct sockaddr_in6 * const, const struct rtentry *); 359 int ip6_ctloutput(int, struct socket *, struct sockopt *); 360 int ip6_raw_ctloutput(int, struct socket *, struct sockopt *); 361 void ip6_initpktopts(struct ip6_pktopts *); 362 int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *, 363 struct ip6_pktopts *, kauth_cred_t, int); 364 void ip6_clearpktopts(struct ip6_pktopts *, int); 365 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int); 366 int ip6_optlen(struct in6pcb *); 367 368 void ip6_statinc(u_int); 369 370 int route6_input(struct mbuf **, int *, int); 371 372 void frag6_init(void); 373 int frag6_input(struct mbuf **, int *, int); 374 int ip6_reass_packet(struct mbuf **, int); 375 void frag6_slowtimo(void); 376 void frag6_fasttimo(void); 377 void frag6_drain(void); 378 void frag6_drainstub(void); 379 380 int ip6flow_init(int); 381 void ip6flow_poolinit(void); 382 struct ip6flow *ip6flow_reap(int); 383 void ip6flow_create(struct route *, struct mbuf *); 384 void ip6flow_slowtimo(void); 385 int ip6flow_invalidate_all(int); 386 387 void rip6_init(void); 388 int rip6_input(struct mbuf **, int *, int); 389 void *rip6_ctlinput(int, const struct sockaddr *, void *); 390 int rip6_ctloutput(int, struct socket *, struct sockopt *); 391 int rip6_output(struct mbuf *, struct socket *, struct sockaddr_in6 *, 392 struct mbuf *); 393 int rip6_attach(struct socket *, int); 394 int rip6_usrreq(struct socket *, 395 int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *); 396 397 int dest6_input(struct mbuf **, int *, int); 398 int none_input(struct mbuf **, int *, int); 399 400 struct route; 401 402 int in6_selectsrc(struct sockaddr_in6 *, struct ip6_pktopts *, 403 struct ip6_moptions *, struct route *, struct in6_addr *, 404 struct ifnet **, struct psref *, struct in6_addr *); 405 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *, 406 struct route **, struct rtentry **, bool); 407 int ip6_get_membership(const struct sockopt *, struct ifnet **, 408 struct psref *, void *, size_t); 409 410 u_int32_t ip6_randomid(void); 411 u_int32_t ip6_randomflowlabel(void); 412 #endif /* _KERNEL */ 413 414 #endif /* !_NETINET6_IP6_VAR_H_ */ 415
Indexes created Sun Oct 19 02:09:48 GMT 2025