1 /* $NetBSD: ip6_var.h,v 1.84 2020/06/19 16:08:06 maxv 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 struct ip6_moptions { 71 if_index_t im6o_multicast_if_index; /* I/F for outgoing multicasts */ 72 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 73 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 74 LIST_HEAD(, in6_multi_mship) im6o_memberships; 75 }; 76 77 /* 78 * Control options for outgoing packets 79 */ 80 81 /* Routing header related info */ 82 struct ip6po_rhinfo { 83 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 84 struct route ip6po_rhi_route; /* Route to the 1st hop */ 85 }; 86 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 87 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route 88 89 /* Nexthop related info */ 90 struct ip6po_nhinfo { 91 struct sockaddr *ip6po_nhi_nexthop; 92 struct route ip6po_nhi_route; /* Route to the nexthop */ 93 }; 94 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop 95 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route 96 97 struct ip6_pktopts { 98 int ip6po_hlim; /* Hoplimit for outgoing packets */ 99 struct in6_pktinfo *ip6po_pktinfo; /* Outgoing IF/address information */ 100 struct ip6po_nhinfo ip6po_nhinfo; /* Next-hop address information */ 101 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 102 struct ip6_dest *ip6po_dest1; /* Destination options header(1st part) */ 103 struct ip6po_rhinfo ip6po_rhinfo; /* Routing header related info. */ 104 struct ip6_dest *ip6po_dest2; /* Destination options header(2nd part) */ 105 int ip6po_tclass; /* traffic class */ 106 int ip6po_minmtu; /* fragment vs PMTU discovery policy */ 107 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/ 108 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ 109 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ 110 int ip6po_prefer_tempaddr; /* whether temporary addresses are 111 * preferred as source address */ 112 #define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */ 113 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */ 114 #define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */ 115 int ip6po_flags; 116 #if 0 /* parameters in this block is obsolete. do not reuse the values. */ 117 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */ 118 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 119 #endif 120 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ 121 }; 122 123 /* 124 * IPv6 statistics. 125 * Each counter is an unsigned 64-bit value. 126 */ 127 #define IP6_STAT_TOTAL 0 /* total packets received */ 128 #define IP6_STAT_TOOSHORT 1 /* packet too short */ 129 #define IP6_STAT_TOOSMALL 2 /* not enough data */ 130 #define IP6_STAT_FRAGMENTS 3 /* fragments received */ 131 #define IP6_STAT_FRAGDROPPED 4 /* frags dropped (dups, out of space) */ 132 #define IP6_STAT_FRAGTIMEOUT 5 /* fragments timed out */ 133 #define IP6_STAT_FRAGOVERFLOW 6 /* fragments that exceed limit */ 134 #define IP6_STAT_FORWARD 7 /* packets forwarded */ 135 #define IP6_STAT_CANTFORWARD 8 /* packets rcvd for uncreachable dst */ 136 #define IP6_STAT_REDIRECTSENT 9 /* packets forwarded on same net */ 137 #define IP6_STAT_DELIVERED 10 /* datagrams delivered to upper level */ 138 #define IP6_STAT_LOCALOUT 11 /* total IP packets generated here */ 139 #define IP6_STAT_ODROPPED 12 /* lost packets due to nobufs, etc. */ 140 #define IP6_STAT_REASSEMBLED 13 /* total packets reassembled ok */ 141 #define IP6_STAT_FRAGMENTED 14 /* datagrams successfully fragmented */ 142 #define IP6_STAT_OFRAGMENTS 15 /* output fragments created */ 143 #define IP6_STAT_CANTFRAG 16 /* don't fragment flag was set, etc. */ 144 #define IP6_STAT_BADOPTIONS 17 /* error in option processing */ 145 #define IP6_STAT_NOROUTE 18 /* packets discarded due to no route */ 146 #define IP6_STAT_BADVERS 19 /* ip6 version != 6 */ 147 #define IP6_STAT_RAWOUT 20 /* total raw ip packets generated */ 148 #define IP6_STAT_BADSCOPE 21 /* scope error */ 149 #define IP6_STAT_NOTMEMBER 22 /* don't join this multicast group */ 150 #define IP6_STAT_NXTHIST 23 /* next header histogram */ 151 /* space for 256 counters */ 152 #define IP6_STAT_M1 279 /* one mbuf */ 153 #define IP6_STAT_M2M 280 /* two or more mbuf */ 154 /* space for 32 counters */ 155 #define IP6_STAT_MEXT1 312 /* one ext mbuf */ 156 #define IP6_STAT_MEXT2M 313 /* two or more ext mbuf */ 157 #define IP6_STAT_EXTHDRTOOLONG 314 /* ext hdr are not contiguous */ 158 #define IP6_STAT_NOGIF 315 /* no match gif found */ 159 #define IP6_STAT_TOOMANYHDR 316 /* discarded due to too many headers */ 160 /* 161 * statistics for improvement of the source address selection 162 * algorithm: 163 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 164 */ 165 #define IP6_STAT_SOURCES_NONE 317 /* number of times that address 166 selection fails */ 167 #define IP6_STAT_SOURCES_SAMEIF 318 /* number of times that an address 168 on the outgoing I/F is chosen */ 169 /* space for 16 counters */ 170 #define IP6_STAT_SOURCES_OTHERIF 334 /* number of times that an address on 171 a non-outgoing I/F is chosen */ 172 /* space for 16 counters */ 173 #define IP6_STAT_SOURCES_SAMESCOPE 350 /* number of times that an address that 174 has the same scope from the dest. 175 is chosen */ 176 /* space for 16 counters */ 177 #define IP6_STAT_SOURCES_OTHERSCOPE 366 /* number of times that an address that 178 has a different scope from the dest. 179 is chosen */ 180 /* space for 16 counters */ 181 #define IP6_STAT_SOURCES_DEPRECATED 382 /* number of times that a deprecated 182 address is chosen */ 183 /* space for 16 counters */ 184 #define IP6_STAT_FORWARD_CACHEHIT 398 185 #define IP6_STAT_FORWARD_CACHEMISS 399 186 #define IP6_STAT_FASTFORWARD 400 /* packets fast forwarded */ 187 #define IP6_STAT_FASTFORWARDFLOWS 401 /* number of fast forward flows */ 188 #define IP6_STAT_NOIPSEC 402 /* no match ipsec(4) found */ 189 #define IP6_STAT_PFILDROP_IN 403 /* dropped by pfil (PFIL_IN) */ 190 #define IP6_STAT_PFILDROP_OUT 404 /* dropped by pfil (PFIL_OUT) */ 191 192 #define IP6_NSTATS 405 193 194 #define IP6FLOW_HASHBITS 6 /* should not be a multiple of 8 */ 195 196 /* 197 * Structure for an IPv6 flow (ip6_fastforward). 198 */ 199 struct ip6flow { 200 TAILQ_ENTRY(ip6flow) ip6f_list; /* next in active list */ 201 TAILQ_ENTRY(ip6flow) ip6f_hash; /* next ip6flow in bucket */ 202 size_t ip6f_hashidx; /* own hash index of ipflowtable[] */ 203 struct in6_addr ip6f_dst; /* destination address */ 204 struct in6_addr ip6f_src; /* source address */ 205 struct route ip6f_ro; /* associated route entry */ 206 u_int32_t ip6f_flow; /* flow (tos) */ 207 u_quad_t ip6f_uses; /* number of uses in this period */ 208 u_quad_t ip6f_last_uses; /* number of uses in last period */ 209 u_quad_t ip6f_dropped; /* ENOBUFS returned by if_output */ 210 u_quad_t ip6f_forwarded; /* packets forwarded */ 211 u_int ip6f_timer; /* lifetime timer */ 212 }; 213 214 #ifdef _KERNEL 215 /* 216 * Auxiliary attributes of incoming IPv6 packets, which is initialized when we 217 * come into ip6_input(). 218 * XXX do not make it a kitchen sink! 219 */ 220 struct ip6aux { 221 /* ip6.ip6_dst */ 222 struct in6_addr ip6a_src; 223 uint32_t ip6a_scope_id; 224 int ip6a_flags; 225 }; 226 227 /* flags passed to ip6_output as last parameter */ 228 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */ 229 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 230 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 231 232 extern u_int32_t ip6_id; /* fragment identifier */ 233 extern int ip6_defhlim; /* default hop limit */ 234 extern int ip6_defmcasthlim; /* default multicast hop limit */ 235 extern int ip6_forwarding; /* act as router? */ 236 extern int ip6_sendredirect; /* send ICMPv6 redirect? */ 237 extern int ip6_use_deprecated; /* allow deprecated addr as source */ 238 extern int ip6_mcast_pmtu; /* enable pMTU discovery for multicast? */ 239 extern int ip6_v6only; 240 extern int ip6_neighborgcthresh; /* Threshold # of NDP entries for GC */ 241 extern int ip6_maxdynroutes; /* Max # of routes created via redirect */ 242 243 244 extern struct socket *ip6_mrouter; /* multicast routing daemon */ 245 extern int ip6_sendredirects; /* send IP redirects when forwarding? */ 246 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */ 247 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */ 248 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */ 249 extern int ip6_log_interval; 250 extern time_t ip6_log_time; 251 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */ 252 extern int ip6_dad_count; /* DupAddrDetectionTransmits */ 253 254 extern int ip6_auto_flowlabel; 255 extern int ip6_auto_linklocal; 256 257 extern int ip6_anonportmin; /* minimum ephemeral port */ 258 extern int ip6_anonportmax; /* maximum ephemeral port */ 259 extern int ip6_lowportmin; /* minimum reserved port */ 260 extern int ip6_lowportmax; /* maximum reserved port */ 261 262 extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses 263 in the source address selection */ 264 extern int ip6_use_defzone; /* whether to use the default scope zone 265 when unspecified */ 266 267 #ifdef GATEWAY 268 extern int ip6_maxflows; /* maximum amount of flows for ip6ff */ 269 extern int ip6_hashsize; /* size of hash table */ 270 #endif 271 272 struct in6pcb; 273 extern const struct pr_usrreqs rip6_usrreqs; 274 275 int icmp6_ctloutput(int, struct socket *, struct sockopt *); 276 277 struct mbuf; 278 void ip6_init(void); 279 const struct ip6aux *ip6_getdstifaddr(struct mbuf *); 280 void ip6_freepcbopts(struct ip6_pktopts *); 281 void ip6_freemoptions(struct ip6_moptions *); 282 int ip6_unknown_opt(u_int8_t *, struct mbuf *, int); 283 int ip6_get_prevhdr(struct mbuf *, int); 284 int ip6_nexthdr(struct mbuf *, int, int, int *); 285 int ip6_lasthdr(struct mbuf *, int, int, int *); 286 287 struct ip6_hdr; 288 int ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *); 289 int ip6_hopopts_input(u_int32_t *, u_int32_t *, struct mbuf **, int *); 290 void ip6_savecontrol(struct in6pcb *, struct mbuf **, struct ip6_hdr *, 291 struct mbuf *); 292 void ip6_notify_pmtu(struct in6pcb *, const struct sockaddr_in6 *, 293 u_int32_t *); 294 int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); 295 296 void ip6_forward(struct mbuf *, int); 297 298 void ip6_mloopback(struct ifnet *, struct mbuf *, 299 const struct sockaddr_in6 *); 300 int ip6_output(struct mbuf *, struct ip6_pktopts *, struct route *, int, 301 struct ip6_moptions *, struct in6pcb *, struct ifnet **); 302 int ip6_if_output(struct ifnet * const, struct ifnet * const, 303 struct mbuf * const, 304 const struct sockaddr_in6 * const, const struct rtentry *); 305 int ip6_ctloutput(int, struct socket *, struct sockopt *); 306 int ip6_raw_ctloutput(int, struct socket *, struct sockopt *); 307 void ip6_initpktopts(struct ip6_pktopts *); 308 int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *, 309 struct ip6_pktopts *, kauth_cred_t, int); 310 void ip6_clearpktopts(struct ip6_pktopts *, int); 311 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int); 312 int ip6_optlen(struct in6pcb *); 313 314 void ip6_statinc(u_int); 315 316 int route6_input(struct mbuf **, int *, int); 317 318 void frag6_init(void); 319 int frag6_input(struct mbuf **, int *, int); 320 int ip6_reass_packet(struct mbuf **, int); 321 void frag6_slowtimo(void); 322 void frag6_fasttimo(void); 323 void frag6_drain(void); 324 void frag6_drainstub(void); 325 326 int ip6flow_init(int); 327 void ip6flow_poolinit(void); 328 struct ip6flow *ip6flow_reap(int); 329 void ip6flow_create(struct route *, struct mbuf *); 330 void ip6flow_slowtimo(void); 331 int ip6flow_invalidate_all(int); 332 333 void rip6_init(void); 334 int rip6_input(struct mbuf **, int *, int); 335 void *rip6_ctlinput(int, const struct sockaddr *, void *); 336 int rip6_ctloutput(int, struct socket *, struct sockopt *); 337 int rip6_output(struct mbuf *, struct socket *, struct sockaddr_in6 *, 338 struct mbuf *); 339 int rip6_attach(struct socket *, int); 340 int rip6_usrreq(struct socket *, 341 int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *); 342 343 int dest6_input(struct mbuf **, int *, int); 344 int none_input(struct mbuf **, int *, int); 345 346 struct route; 347 348 int in6_selectsrc(struct sockaddr_in6 *, struct ip6_pktopts *, 349 struct ip6_moptions *, struct route *, struct in6_addr *, 350 struct ifnet **, struct psref *, struct in6_addr *); 351 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *, 352 struct route **, struct rtentry **, bool); 353 int ip6_get_membership(const struct sockopt *, struct ifnet **, 354 struct psref *, void *, size_t); 355 356 u_int32_t ip6_randomid(void); 357 u_int32_t ip6_randomflowlabel(void); 358 359 static inline bool 360 ip6_dad_enabled(void) 361 { 362 363 return ip6_dad_count > 0; 364 } 365 #endif /* _KERNEL */ 366 367 #endif /* !_NETINET6_IP6_VAR_H_ */ 368