ip6_var.h revision 1.61
1 /* $NetBSD: ip6_var.h,v 1.61 2014/05/19 02:51:25 rmind 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 }; 93 94 struct ip6asfrag { 95 u_int32_t ip6af_head; 96 u_int16_t ip6af_len; 97 u_int8_t ip6af_nxt; 98 u_int8_t ip6af_hlim; 99 /* must not override the above members during reassembling */ 100 struct ip6asfrag *ip6af_down; 101 struct ip6asfrag *ip6af_up; 102 struct mbuf *ip6af_m; 103 int ip6af_offset; /* offset in ip6af_m to next header */ 104 int ip6af_frglen; /* fragmentable part length */ 105 int ip6af_off; /* fragment offset */ 106 u_int16_t ip6af_mff; /* more fragment bit in frag off */ 107 }; 108 109 #define IP6_REASS_MBUF(ip6af) ((ip6af)->ip6af_m) 110 111 struct ip6_moptions { 112 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */ 113 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 114 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 115 LIST_HEAD(, in6_multi_mship) im6o_memberships; 116 }; 117 118 /* 119 * Control options for outgoing packets 120 */ 121 122 /* Routing header related info */ 123 struct ip6po_rhinfo { 124 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 125 struct route ip6po_rhi_route; /* Route to the 1st hop */ 126 }; 127 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 128 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route 129 130 /* Nexthop related info */ 131 struct ip6po_nhinfo { 132 struct sockaddr *ip6po_nhi_nexthop; 133 struct route ip6po_nhi_route; /* Route to the nexthop */ 134 }; 135 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop 136 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route 137 138 struct ip6_pktopts { 139 int ip6po_hlim; /* Hoplimit for outgoing packets */ 140 struct in6_pktinfo *ip6po_pktinfo; /* Outgoing IF/address information */ 141 struct ip6po_nhinfo ip6po_nhinfo; /* Next-hop address information */ 142 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 143 struct ip6_dest *ip6po_dest1; /* Destination options header(1st part) */ 144 struct ip6po_rhinfo ip6po_rhinfo; /* Routing header related info. */ 145 struct ip6_dest *ip6po_dest2; /* Destination options header(2nd part) */ 146 int ip6po_tclass; /* traffic class */ 147 int ip6po_minmtu; /* fragment vs PMTU discovery policy */ 148 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/ 149 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ 150 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ 151 int ip6po_flags; 152 #if 0 /* parameters in this block is obsolete. do not reuse the values. */ 153 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */ 154 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 155 #endif 156 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ 157 }; 158 159 /* 160 * IPv6 statistics. 161 * Each counter is an unsigned 64-bit value. 162 */ 163 #define IP6_STAT_TOTAL 0 /* total packets received */ 164 #define IP6_STAT_TOOSHORT 1 /* packet too short */ 165 #define IP6_STAT_TOOSMALL 2 /* not enough data */ 166 #define IP6_STAT_FRAGMENTS 3 /* fragments received */ 167 #define IP6_STAT_FRAGDROPPED 4 /* frags dropped (dups, out of space) */ 168 #define IP6_STAT_FRAGTIMEOUT 5 /* fragments timed out */ 169 #define IP6_STAT_FRAGOVERFLOW 6 /* fragments that exceed limit */ 170 #define IP6_STAT_FORWARD 7 /* packets forwarded */ 171 #define IP6_STAT_CANTFORWARD 8 /* packets rcvd for uncreachable dst */ 172 #define IP6_STAT_REDIRECTSENT 9 /* packets forwarded on same net */ 173 #define IP6_STAT_DELIVERED 10 /* datagrams delivered to upper level */ 174 #define IP6_STAT_LOCALOUT 11 /* total IP packets generated here */ 175 #define IP6_STAT_ODROPPED 12 /* lost packets due to nobufs, etc. */ 176 #define IP6_STAT_REASSEMBLED 13 /* total packets reassembled ok */ 177 #define IP6_STAT_FRAGMENTED 14 /* datagrams successfully fragmented */ 178 #define IP6_STAT_OFRAGMENTS 15 /* output fragments created */ 179 #define IP6_STAT_CANTFRAG 16 /* don't fragment flag was set, etc. */ 180 #define IP6_STAT_BADOPTIONS 17 /* error in option processing */ 181 #define IP6_STAT_NOROUTE 18 /* packets discarded due to no route */ 182 #define IP6_STAT_BADVERS 19 /* ip6 version != 6 */ 183 #define IP6_STAT_RAWOUT 20 /* total raw ip packets generated */ 184 #define IP6_STAT_BADSCOPE 21 /* scope error */ 185 #define IP6_STAT_NOTMEMBER 22 /* don't join this multicast group */ 186 #define IP6_STAT_NXTHIST 23 /* next header histogram */ 187 /* space for 256 counters */ 188 #define IP6_STAT_M1 279 /* one mbuf */ 189 #define IP6_STAT_M2M 280 /* two or more mbuf */ 190 /* space for 32 counters */ 191 #define IP6_STAT_MEXT1 312 /* one ext mbuf */ 192 #define IP6_STAT_MEXT2M 313 /* two or more ext mbuf */ 193 #define IP6_STAT_EXTHDRTOOLONG 314 /* ext hdr are not contiguous */ 194 #define IP6_STAT_NOGIF 315 /* no match gif found */ 195 #define IP6_STAT_TOOMANYHDR 316 /* discarded due to too many headers */ 196 /* 197 * statistics for improvement of the source address selection 198 * algorithm: 199 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 200 */ 201 #define IP6_STAT_SOURCES_NONE 317 /* number of times that address 202 selection fails */ 203 #define IP6_STAT_SOURCES_SAMEIF 318 /* number of times that an address 204 on the outgoing I/F is chosen */ 205 /* space for 16 counters */ 206 #define IP6_STAT_SOURCES_OTHERIF 334 /* number of times that an address on 207 a non-outgoing I/F is chosen */ 208 /* space for 16 counters */ 209 #define IP6_STAT_SOURCES_SAMESCOPE 350 /* number of times that an address that 210 has the same scope from the dest. 211 is chosen */ 212 /* space for 16 counters */ 213 #define IP6_STAT_SOURCES_OTHERSCOPE 366 /* number of times that an address that 214 has a different scope from the dest. 215 is chosen */ 216 /* space for 16 counters */ 217 #define IP6_STAT_SOURCES_DEPRECATED 382 /* number of times that a deprecated 218 address is chosen */ 219 /* space for 16 counters */ 220 #define IP6_STAT_FORWARD_CACHEHIT 398 221 #define IP6_STAT_FORWARD_CACHEMISS 399 222 #define IP6_STAT_FASTFORWARD 400 /* packets fast forwarded */ 223 #define IP6_STAT_FASTFORWARDFLOWS 401 /* number of fast forward flows */ 224 225 #define IP6_NSTATS 402 226 227 #define IP6FLOW_HASHBITS 6 /* should not be a multiple of 8 */ 228 229 /* 230 * Structure for an IPv6 flow (ip6_fastforward). 231 */ 232 struct ip6flow { 233 LIST_ENTRY(ip6flow) ip6f_list; /* next in active list */ 234 LIST_ENTRY(ip6flow) ip6f_hash; /* next ip6flow in bucket */ 235 struct in6_addr ip6f_dst; /* destination address */ 236 struct in6_addr ip6f_src; /* source address */ 237 struct route ip6f_ro; /* associated route entry */ 238 u_int32_t ip6f_flow; /* flow (tos) */ 239 u_quad_t ip6f_uses; /* number of uses in this period */ 240 u_quad_t ip6f_last_uses; /* number of uses in last period */ 241 u_quad_t ip6f_dropped; /* ENOBUFS returned by if_output */ 242 u_quad_t ip6f_forwarded; /* packets forwarded */ 243 u_int ip6f_timer; /* lifetime timer */ 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 extern int ip6_neighborgcthresh; /* Threshold # of NDP entries for GC */ 276 extern int ip6_maxifprefixes; /* Max acceptable prefixes via RA per IF */ 277 extern int ip6_maxifdefrouters; /* Max acceptable def routers via RA */ 278 extern int ip6_maxdynroutes; /* Max # of routes created via redirect */ 279 280 281 extern struct socket *ip6_mrouter; /* multicast routing daemon */ 282 extern int ip6_sendredirects; /* send IP redirects when forwarding? */ 283 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */ 284 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */ 285 extern int ip6_sourcecheck; /* Verify source interface */ 286 extern int ip6_sourcecheck_interval; /* Interval between log messages */ 287 extern int ip6_accept_rtadv; /* Acts as a host not a router */ 288 extern int ip6_rtadv_maxroutes; /* maximum number of routes via rtadv */ 289 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */ 290 extern int ip6_log_interval; 291 extern time_t ip6_log_time; 292 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */ 293 extern int ip6_dad_count; /* DupAddrDetectionTransmits */ 294 295 extern int ip6_auto_flowlabel; 296 extern int ip6_auto_linklocal; 297 298 extern int ip6_anonportmin; /* minimum ephemeral port */ 299 extern int ip6_anonportmax; /* maximum ephemeral port */ 300 extern int ip6_lowportmin; /* minimum reserved port */ 301 extern int ip6_lowportmax; /* maximum reserved port */ 302 303 extern int ip6_use_tempaddr; /* whether to use temporary addresses. */ 304 extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses 305 in the source address selection */ 306 extern int ip6_use_defzone; /* whether to use the default scope zone 307 when unspecified */ 308 309 #ifdef GATEWAY 310 extern int ip6_maxflows; /* maximum amount of flows for ip6ff */ 311 extern int ip6_hashsize; /* size of hash table */ 312 #endif 313 314 struct in6pcb; 315 extern const struct pr_usrreqs rip6_usrreqs; 316 317 int icmp6_ctloutput(int, struct socket *, struct sockopt *); 318 319 void ip6_init(void); 320 void ip6intr(void); 321 void ip6_input(struct mbuf *); 322 const struct ip6aux *ip6_getdstifaddr(struct mbuf *); 323 void ip6_freepcbopts(struct ip6_pktopts *); 324 void ip6_freemoptions(struct ip6_moptions *); 325 int ip6_unknown_opt(u_int8_t *, struct mbuf *, int); 326 u_int8_t *ip6_get_prevhdr(struct mbuf *, int); 327 int ip6_nexthdr(struct mbuf *, int, int, int *); 328 int ip6_lasthdr(struct mbuf *, int, int, int *); 329 330 struct m_tag *ip6_addaux(struct mbuf *); 331 struct m_tag *ip6_findaux(struct mbuf *); 332 void ip6_delaux(struct mbuf *); 333 334 int ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *); 335 int ip6_hopopts_input(u_int32_t *, u_int32_t *, struct mbuf **, int *); 336 void ip6_savecontrol(struct in6pcb *, struct mbuf **, struct ip6_hdr *, 337 struct mbuf *); 338 void ip6_notify_pmtu(struct in6pcb *, const struct sockaddr_in6 *, 339 u_int32_t *); 340 int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); 341 342 void ip6_forward(struct mbuf *, int); 343 344 void ip6_mloopback(struct ifnet *, struct mbuf *, 345 const struct sockaddr_in6 *); 346 int ip6_output(struct mbuf *, struct ip6_pktopts *, 347 struct route *, int, 348 struct ip6_moptions *, struct socket *, 349 struct ifnet **); 350 int ip6_ctloutput(int, struct socket *, struct sockopt *); 351 int ip6_raw_ctloutput(int, struct socket *, struct sockopt *); 352 void ip6_initpktopts(struct ip6_pktopts *); 353 int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *, 354 struct ip6_pktopts *, kauth_cred_t, int); 355 void ip6_clearpktopts(struct ip6_pktopts *, int); 356 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int); 357 int ip6_optlen(struct in6pcb *); 358 359 void ip6_statinc(u_int); 360 361 int route6_input(struct mbuf **, int *, int); 362 363 void frag6_init(void); 364 int frag6_input(struct mbuf **, int *, int); 365 int ip6_reass_packet(struct mbuf **, int); 366 void frag6_slowtimo(void); 367 void frag6_fasttimo(void); 368 void frag6_drain(void); 369 void frag6_drainstub(void); 370 371 int ip6flow_init(int); 372 void ip6flow_poolinit(void); 373 struct ip6flow *ip6flow_reap(int); 374 void ip6flow_create(const struct route *, struct mbuf *); 375 void ip6flow_slowtimo(void); 376 int ip6flow_invalidate_all(int); 377 378 void rip6_init(void); 379 int rip6_input(struct mbuf **, int *, int); 380 void *rip6_ctlinput(int, const struct sockaddr *, void *); 381 int rip6_ctloutput(int, struct socket *, struct sockopt *); 382 int rip6_output(struct mbuf *, struct socket *, struct sockaddr_in6 *, 383 struct mbuf *); 384 int rip6_attach(struct socket *, int); 385 int rip6_usrreq(struct socket *, 386 int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *); 387 388 int dest6_input(struct mbuf **, int *, int); 389 int none_input(struct mbuf **, int *, int); 390 391 struct route; 392 393 struct in6_addr *in6_selectsrc(struct sockaddr_in6 *, 394 struct ip6_pktopts *, struct ip6_moptions *, struct route *, 395 struct in6_addr *, struct ifnet **, int *); 396 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *, 397 struct ip6_moptions *, struct route *, struct ifnet **, 398 struct rtentry **, int); 399 400 u_int32_t ip6_randomid(void); 401 u_int32_t ip6_randomflowlabel(void); 402 #endif /* _KERNEL */ 403 404 #endif /* !_NETINET6_IP6_VAR_H_ */ 405
Indexes created Fri Oct 17 23:09:53 GMT 2025