1 /* $NetBSD: ip6_var.h,v 1.94 2024/02/09 22:08:37 andvar 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/types.h> 68 #include <sys/queue.h> 69 #include <sys/socketvar.h> 70 71 #include <net/if.h> 72 #include <net/route.h> 73 74 #include <netinet/in.h> 75 #include <netinet/ip6.h> 76 77 struct ip6_moptions { 78 if_index_t im6o_multicast_if_index; /* I/F for outgoing multicasts */ 79 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 80 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 81 LIST_HEAD(, in6_multi_mship) im6o_memberships; 82 }; 83 84 /* 85 * Control options for outgoing packets 86 */ 87 88 /* Routing header related info */ 89 struct ip6po_rhinfo { 90 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 91 struct route ip6po_rhi_route; /* Route to the 1st hop */ 92 }; 93 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 94 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route 95 96 /* Nexthop related info */ 97 struct ip6po_nhinfo { 98 struct sockaddr *ip6po_nhi_nexthop; 99 struct route ip6po_nhi_route; /* Route to the nexthop */ 100 }; 101 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop 102 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route 103 104 struct ip6_pktopts { 105 int ip6po_hlim; /* Hoplimit for outgoing packets */ 106 struct in6_pktinfo *ip6po_pktinfo; /* Outgoing IF/address information */ 107 struct ip6po_nhinfo ip6po_nhinfo; /* Next-hop address information */ 108 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 109 struct ip6_dest *ip6po_dest1; /* Destination options header(1st part) */ 110 struct ip6po_rhinfo ip6po_rhinfo; /* Routing header related info. */ 111 struct ip6_dest *ip6po_dest2; /* Destination options header(2nd part) */ 112 int ip6po_tclass; /* traffic class */ 113 int ip6po_minmtu; /* fragment vs PMTU discovery policy */ 114 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/ 115 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ 116 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ 117 int ip6po_prefer_tempaddr; /* whether temporary addresses are 118 * preferred as source address */ 119 #define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */ 120 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */ 121 #define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */ 122 int ip6po_flags; 123 #if 0 /* parameters in this block is obsolete. do not reuse the values. */ 124 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */ 125 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 126 #endif 127 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ 128 }; 129 130 /* 131 * IPv6 statistics. 132 * Each counter is an unsigned 64-bit value. 133 */ 134 #define IP6_STAT_TOTAL 0 /* total packets received */ 135 #define IP6_STAT_TOOSHORT 1 /* packet too short */ 136 #define IP6_STAT_TOOSMALL 2 /* not enough data */ 137 #define IP6_STAT_FRAGMENTS 3 /* fragments received */ 138 #define IP6_STAT_FRAGDROPPED 4 /* frags dropped (dups, out of space) */ 139 #define IP6_STAT_FRAGTIMEOUT 5 /* fragments timed out */ 140 #define IP6_STAT_FRAGOVERFLOW 6 /* fragments that exceed limit */ 141 #define IP6_STAT_FORWARD 7 /* packets forwarded */ 142 #define IP6_STAT_CANTFORWARD 8 /* packets rcvd for uncreachable dst */ 143 #define IP6_STAT_REDIRECTSENT 9 /* packets forwarded on same net */ 144 #define IP6_STAT_DELIVERED 10 /* datagrams delivered to upper level */ 145 #define IP6_STAT_LOCALOUT 11 /* total IP packets generated here */ 146 #define IP6_STAT_ODROPPED 12 /* lost packets due to nobufs, etc. */ 147 #define IP6_STAT_REASSEMBLED 13 /* total packets reassembled ok */ 148 #define IP6_STAT_FRAGMENTED 14 /* datagrams successfully fragmented */ 149 #define IP6_STAT_OFRAGMENTS 15 /* output fragments created */ 150 #define IP6_STAT_CANTFRAG 16 /* don't fragment flag was set, etc. */ 151 #define IP6_STAT_BADOPTIONS 17 /* error in option processing */ 152 #define IP6_STAT_NOROUTE 18 /* packets discarded due to no route */ 153 #define IP6_STAT_BADVERS 19 /* ip6 version != 6 */ 154 #define IP6_STAT_RAWOUT 20 /* total raw ip packets generated */ 155 #define IP6_STAT_BADSCOPE 21 /* scope error */ 156 #define IP6_STAT_NOTMEMBER 22 /* don't join this multicast group */ 157 #define IP6_STAT_NXTHIST 23 /* next header histogram */ 158 /* space for 256 counters */ 159 #define IP6_STAT_M1 279 /* one mbuf */ 160 #define IP6_STAT_M2M 280 /* two or more mbuf */ 161 /* space for 32 counters */ 162 #define IP6_STAT_MEXT1 312 /* one ext mbuf */ 163 #define IP6_STAT_MEXT2M 313 /* two or more ext mbuf */ 164 #define IP6_STAT_EXTHDRTOOLONG 314 /* ext hdr are not contiguous */ 165 #define IP6_STAT_NOGIF 315 /* no match gif found */ 166 #define IP6_STAT_TOOMANYHDR 316 /* discarded due to too many headers */ 167 /* 168 * statistics for improvement of the source address selection 169 * algorithm: 170 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 171 */ 172 #define IP6_STAT_SOURCES_NONE 317 /* number of times that address 173 selection fails */ 174 #define IP6_STAT_SOURCES_SAMEIF 318 /* number of times that an address 175 on the outgoing I/F is chosen */ 176 /* space for 16 counters */ 177 #define IP6_STAT_SOURCES_OTHERIF 334 /* number of times that an address on 178 a non-outgoing I/F is chosen */ 179 /* space for 16 counters */ 180 #define IP6_STAT_SOURCES_SAMESCOPE 350 /* number of times that an address that 181 has the same scope from the dest. 182 is chosen */ 183 /* space for 16 counters */ 184 #define IP6_STAT_SOURCES_OTHERSCOPE 366 /* number of times that an address that 185 has a different scope from the dest. 186 is chosen */ 187 /* space for 16 counters */ 188 #define IP6_STAT_SOURCES_DEPRECATED 382 /* number of times that a deprecated 189 address is chosen */ 190 /* space for 16 counters */ 191 #define IP6_STAT_FORWARD_CACHEHIT 398 192 #define IP6_STAT_FORWARD_CACHEMISS 399 193 #define IP6_STAT_FASTFORWARD 400 /* packets fast forwarded */ 194 #define IP6_STAT_FASTFORWARDFLOWS 401 /* number of fast forward flows */ 195 #define IP6_STAT_NOIPSEC 402 /* no match ipsec(4) found */ 196 #define IP6_STAT_PFILDROP_IN 403 /* dropped by pfil (PFIL_IN) */ 197 #define IP6_STAT_PFILDROP_OUT 404 /* dropped by pfil (PFIL_OUT) */ 198 #define IP6_STAT_IPSECDROP_IN 405 /* dropped by IPsec SP check */ 199 #define IP6_STAT_IPSECDROP_OUT 406 /* dropped by IPsec SP check */ 200 #define IP6_STAT_IFDROP 407 /* dropped due to interface state */ 201 #define IP6_STAT_IDROPPED 408 /* lost packets due to nobufs, etc. */ 202 #define IP6_STAT_TIMXCEED 409 /* hop limit exceeded */ 203 #define IP6_STAT_TOOBIG 410 /* packet bigger than MTU */ 204 #define IP6_STAT_RTREJECT 411 /* rejected by route */ 205 206 #define IP6_NSTATS 412 207 208 #define IP6FLOW_HASHBITS 6 /* should not be a multiple of 8 */ 209 210 /* 211 * Structure for an IPv6 flow (ip6_fastforward). 212 */ 213 struct ip6flow { 214 TAILQ_ENTRY(ip6flow) ip6f_list; /* next in active list */ 215 TAILQ_ENTRY(ip6flow) ip6f_hash; /* next ip6flow in bucket */ 216 size_t ip6f_hashidx; /* own hash index of ipflowtable[] */ 217 struct in6_addr ip6f_dst; /* destination address */ 218 struct in6_addr ip6f_src; /* source address */ 219 struct route ip6f_ro; /* associated route entry */ 220 u_int32_t ip6f_flow; /* flow (tos) */ 221 u_quad_t ip6f_uses; /* number of uses in this period */ 222 u_quad_t ip6f_last_uses; /* number of uses in last period */ 223 u_quad_t ip6f_dropped; /* ENOBUFS returned by if_output */ 224 u_quad_t ip6f_forwarded; /* packets forwarded */ 225 u_int ip6f_timer; /* lifetime timer */ 226 }; 227 228 #ifdef _KERNEL 229 230 #include <sys/protosw.h> 231 #include <sys/cprng.h> 232 233 /* 234 * Auxiliary attributes of incoming IPv6 packets, which is initialized when we 235 * come into ip6_input(). 236 * XXX do not make it a kitchen sink! 237 */ 238 struct ip6aux { 239 /* ip6.ip6_dst */ 240 struct in6_addr ip6a_src; 241 uint32_t ip6a_scope_id; 242 int ip6a_flags; 243 }; 244 245 /* flags passed to ip6_output as last parameter */ 246 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */ 247 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 248 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 249 250 extern u_int32_t ip6_id; /* fragment identifier */ 251 extern int ip6_defhlim; /* default hop limit */ 252 extern int ip6_defmcasthlim; /* default multicast hop limit */ 253 extern int ip6_forwarding; /* act as router? */ 254 extern int ip6_sendredirect; /* send ICMPv6 redirect? */ 255 extern int ip6_use_deprecated; /* allow deprecated addr as source */ 256 extern int ip6_mcast_pmtu; /* enable pMTU discovery for multicast? */ 257 extern int ip6_v6only; 258 extern int ip6_neighborgcthresh; /* Threshold # of NDP entries for GC */ 259 extern int ip6_maxdynroutes; /* Max # of routes created via redirect */ 260 extern int ip6_param_rt_msg; /* How to send parameter changing rtm */ 261 262 263 extern struct socket *ip6_mrouter; /* multicast routing daemon */ 264 extern int ip6_sendredirects; /* send IP redirects when forwarding? */ 265 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */ 266 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */ 267 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */ 268 extern int ip6_log_interval; 269 extern time_t ip6_log_time; 270 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */ 271 extern int ip6_dad_count; /* DupAddrDetectionTransmits */ 272 273 extern int ip6_auto_flowlabel; 274 extern int ip6_auto_linklocal; 275 276 extern int ip6_anonportmin; /* minimum ephemeral port */ 277 extern int ip6_anonportmax; /* maximum ephemeral port */ 278 extern int ip6_lowportmin; /* minimum reserved port */ 279 extern int ip6_lowportmax; /* maximum reserved port */ 280 281 extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses 282 in the source address selection */ 283 extern int ip6_use_defzone; /* whether to use the default scope zone 284 when unspecified */ 285 286 #ifdef GATEWAY 287 extern int ip6_maxflows; /* maximum amount of flows for ip6ff */ 288 extern int ip6_hashsize; /* size of hash table */ 289 #endif 290 291 struct inpcb; 292 extern const struct pr_usrreqs rip6_usrreqs; 293 294 int icmp6_ctloutput(int, struct socket *, struct sockopt *); 295 296 struct mbuf; 297 void ip6_init(void); 298 const struct ip6aux *ip6_getdstifaddr(struct mbuf *); 299 void ip6_freepcbopts(struct ip6_pktopts *); 300 void ip6_freemoptions(struct ip6_moptions *); 301 int ip6_unknown_opt(u_int8_t *, struct mbuf *, int); 302 int ip6_get_prevhdr(struct mbuf *, int); 303 int ip6_nexthdr(struct mbuf *, int, int, int *); 304 int ip6_lasthdr(struct mbuf *, int, int, int *); 305 306 struct ip6_hdr; 307 int ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *); 308 int ip6_hopopts_input(u_int32_t *, u_int32_t *, struct mbuf **, int *); 309 void ip6_savecontrol(struct inpcb *, struct mbuf **, struct ip6_hdr *, 310 struct mbuf *); 311 void ip6_notify_pmtu(struct inpcb *, const struct sockaddr_in6 *, 312 u_int32_t *); 313 int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); 314 315 void ip6_forward(struct mbuf *, int, struct ifnet *); 316 317 void ip6_mloopback(struct ifnet *, struct mbuf *, 318 const struct sockaddr_in6 *); 319 int ip6_output(struct mbuf *, struct ip6_pktopts *, struct route *, int, 320 struct ip6_moptions *, struct inpcb *, struct ifnet **); 321 int ip6_if_output(struct ifnet * const, struct ifnet * const, 322 struct mbuf * const, 323 const struct sockaddr_in6 * const, const struct rtentry *); 324 int ip6_ctloutput(int, struct socket *, struct sockopt *); 325 int ip6_raw_ctloutput(int, struct socket *, struct sockopt *); 326 void ip6_initpktopts(struct ip6_pktopts *); 327 int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *, 328 struct ip6_pktopts *, kauth_cred_t, int); 329 void ip6_clearpktopts(struct ip6_pktopts *, int); 330 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int); 331 int ip6_optlen(struct inpcb *); 332 333 void ip6_statinc(u_int); 334 335 int route6_input(struct mbuf **, int *, int); 336 337 void frag6_init(void); 338 int frag6_input(struct mbuf **, int *, int); 339 int ip6_reass_packet(struct mbuf **, int); 340 void frag6_slowtimo(void); 341 void frag6_fasttimo(void); 342 void frag6_drain(void); 343 void frag6_drainstub(void); 344 345 int ip6flow_init(int); 346 void ip6flow_poolinit(void); 347 struct ip6flow *ip6flow_reap(int); 348 void ip6flow_create(struct route *, struct mbuf *); 349 void ip6flow_slowtimo(void); 350 int ip6flow_invalidate_all(int); 351 352 void rip6_init(void); 353 int rip6_input(struct mbuf **, int *, int); 354 void *rip6_ctlinput(int, const struct sockaddr *, void *); 355 int rip6_ctloutput(int, struct socket *, struct sockopt *); 356 int rip6_output(struct mbuf *, struct socket *, struct sockaddr_in6 *, 357 struct mbuf *); 358 int rip6_attach(struct socket *, int); 359 int rip6_usrreq(struct socket *, 360 int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *); 361 362 int dest6_input(struct mbuf **, int *, int); 363 int none_input(struct mbuf **, int *, int); 364 365 struct route; 366 367 int in6_selectsrc(struct sockaddr_in6 *, struct ip6_pktopts *, 368 struct ip6_moptions *, struct route *, struct in6_addr *, 369 struct ifnet **, struct psref *, struct in6_addr *); 370 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *, 371 struct route **, struct rtentry **, bool); 372 int ip6_get_membership(const struct sockopt *, struct ifnet **, 373 struct psref *, void *, size_t); 374 375 static __inline uint32_t 376 ip6_randomid(void) 377 { 378 379 return cprng_fast32(); 380 } 381 382 static __inline uint32_t 383 ip6_randomflowlabel(void) 384 { 385 386 return cprng_fast32() & 0xfffff; 387 } 388 389 static __inline bool 390 ip6_dad_enabled(void) 391 { 392 393 return ip6_dad_count > 0; 394 } 395 #endif /* _KERNEL */ 396 397 #endif /* !_NETINET6_IP6_VAR_H_ */ 398
Indexes created Sat Sep 20 22:09:52 GMT 2025