1 /* $OpenBSD: ip6_var.h,v 1.117 2024/05/13 01:15:53 jsg 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 struct ip6stat { 68 u_int64_t ip6s_total; /* total packets received */ 69 u_int64_t ip6s_tooshort; /* packet too short */ 70 u_int64_t ip6s_toosmall; /* not enough data */ 71 u_int64_t ip6s_fragments; /* fragments received */ 72 u_int64_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 73 u_int64_t ip6s_fragtimeout; /* fragments timed out */ 74 u_int64_t ip6s_fragoverflow; /* fragments that exceeded limit */ 75 u_int64_t ip6s_forward; /* packets forwarded */ 76 u_int64_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 77 u_int64_t ip6s_redirectsent; /* packets forwarded on same net */ 78 u_int64_t ip6s_delivered; /* datagrams delivered to upper level*/ 79 u_int64_t ip6s_localout; /* total ip packets generated here */ 80 u_int64_t ip6s_odropped; /* lost output due to nobufs, etc. */ 81 u_int64_t ip6s_reassembled; /* total packets reassembled ok */ 82 u_int64_t ip6s_fragmented; /* datagrams successfully fragmented */ 83 u_int64_t ip6s_ofragments; /* output fragments created */ 84 u_int64_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 85 u_int64_t ip6s_badoptions; /* error in option processing */ 86 u_int64_t ip6s_noroute; /* packets discarded due to no route */ 87 u_int64_t ip6s_badvers; /* ip6 version != 6 */ 88 u_int64_t ip6s_rawout; /* total raw ip packets generated */ 89 u_int64_t ip6s_badscope; /* scope error */ 90 u_int64_t ip6s_notmember; /* don't join this multicast group */ 91 u_int64_t ip6s_nxthist[256]; /* next header history */ 92 u_int64_t ip6s_m1; /* one mbuf */ 93 u_int64_t ip6s_m2m[32]; /* two or more mbuf */ 94 u_int64_t ip6s_mext1; /* one ext mbuf */ 95 u_int64_t ip6s_mext2m; /* two or more ext mbuf */ 96 u_int64_t ip6s_nogif; /* no match gif found */ 97 u_int64_t ip6s_toomanyhdr; /* discarded due to too many headers */ 98 99 /* 100 * statistics for improvement of the source address selection 101 * algorithm: 102 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 103 */ 104 /* number of times that address selection fails */ 105 u_int64_t ip6s_sources_none; 106 /* number of times that an address on the outgoing I/F is chosen */ 107 u_int64_t ip6s_sources_sameif[16]; 108 /* number of times that an address on a non-outgoing I/F is chosen */ 109 u_int64_t ip6s_sources_otherif[16]; 110 /* 111 * number of times that an address that has the same scope 112 * from the destination is chosen. 113 */ 114 u_int64_t ip6s_sources_samescope[16]; 115 /* 116 * number of times that an address that has a different scope 117 * from the destination is chosen. 118 */ 119 u_int64_t ip6s_sources_otherscope[16]; 120 /* number of times that an deprecated address is chosen */ 121 u_int64_t ip6s_sources_deprecated[16]; 122 123 u_int64_t ip6s_rtcachehit; /* valid route found in cache */ 124 u_int64_t ip6s_rtcachemiss; /* route cache with new destination */ 125 u_int64_t ip6s_wrongif; /* packet received on wrong interface */ 126 u_int64_t ip6s_idropped; /* lost input due to nobufs, etc. */ 127 }; 128 129 #ifdef _KERNEL 130 131 /* 132 * IP6 reassembly queue structure. Each fragment 133 * being reassembled is attached to one of these structures. 134 */ 135 struct ip6q { 136 TAILQ_ENTRY(ip6q) ip6q_queue; 137 LIST_HEAD(ip6asfrag_list, ip6asfrag) ip6q_asfrag; 138 struct in6_addr ip6q_src, ip6q_dst; 139 int ip6q_unfrglen; /* len of unfragmentable part */ 140 int ip6q_nfrag; /* # of fragments */ 141 u_int32_t ip6q_ident; /* fragment identification */ 142 u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */ 143 u_int8_t ip6q_ecn; 144 u_int8_t ip6q_ttl; /* time to live in slowtimo units */ 145 }; 146 147 struct ip6asfrag { 148 LIST_ENTRY(ip6asfrag) ip6af_list; 149 struct mbuf *ip6af_m; 150 int ip6af_offset; /* offset in ip6af_m to next header */ 151 int ip6af_frglen; /* fragmentable part length */ 152 int ip6af_off; /* fragment offset */ 153 u_int16_t ip6af_mff; /* more fragment bit in frag off */ 154 }; 155 156 struct ip6_moptions { 157 LIST_HEAD(, in6_multi_mship) im6o_memberships; 158 unsigned short im6o_ifidx; /* ifp index for outgoing multicasts */ 159 u_char im6o_hlim; /* hoplimit for outgoing multicasts */ 160 u_char im6o_loop; /* 1 >= hear sends if a member */ 161 }; 162 163 /* 164 * Control options for outgoing packets 165 */ 166 167 /* Routing header related info */ 168 struct ip6po_rhinfo { 169 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 170 struct route ip6po_rhi_route; /* Route to the 1st hop */ 171 }; 172 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 173 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route 174 175 struct ip6_pktopts { 176 /* Hoplimit for outgoing packets */ 177 int ip6po_hlim; 178 179 /* Outgoing IF/address information */ 180 struct in6_pktinfo *ip6po_pktinfo; 181 182 /* Hop-by-Hop options header */ 183 struct ip6_hbh *ip6po_hbh; 184 185 /* Destination options header (before a routing header) */ 186 struct ip6_dest *ip6po_dest1; 187 188 /* Routing header related info. */ 189 struct ip6po_rhinfo ip6po_rhinfo; 190 191 /* Destination options header (after a routing header) */ 192 struct ip6_dest *ip6po_dest2; 193 194 /* traffic class */ 195 int ip6po_tclass; 196 197 /* fragment vs PMTU discovery policy */ 198 int ip6po_minmtu; 199 #define IP6PO_MINMTU_MCASTONLY -1 /* default: send at min MTU for multicast */ 200 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ 201 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ 202 203 int ip6po_flags; 204 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ 205 }; 206 207 #include <sys/percpu.h> 208 209 enum ip6stat_counters { 210 ip6s_total, 211 ip6s_tooshort, 212 ip6s_toosmall, 213 ip6s_fragments, 214 ip6s_fragdropped, 215 ip6s_fragtimeout, 216 ip6s_fragoverflow, 217 ip6s_forward, 218 ip6s_cantforward, 219 ip6s_redirectsent, 220 ip6s_delivered, 221 ip6s_localout, 222 ip6s_odropped, 223 ip6s_reassembled, 224 ip6s_fragmented, 225 ip6s_ofragments, 226 ip6s_cantfrag, 227 ip6s_badoptions, 228 ip6s_noroute, 229 ip6s_badvers, 230 ip6s_rawout, 231 ip6s_badscope, 232 ip6s_notmember, 233 ip6s_nxthist, 234 ip6s_m1 = ip6s_nxthist + 256, 235 ip6s_m2m, 236 ip6s_mext1 = ip6s_m2m + 32, 237 ip6s_mext2m, 238 ip6s_nogif, 239 ip6s_toomanyhdr, 240 ip6s_sources_none, 241 ip6s_sources_sameif, 242 ip6s_sources_otherif = ip6s_sources_sameif + 16, 243 ip6s_sources_samescope = ip6s_sources_otherif + 16, 244 ip6s_sources_otherscope = ip6s_sources_samescope + 16, 245 ip6s_sources_deprecated = ip6s_sources_otherscope + 16, 246 ip6s_rtcachehit = ip6s_sources_deprecated + 16, 247 ip6s_rtcachemiss, 248 ip6s_wrongif, 249 ip6s_idropped, 250 251 ip6s_ncounters, 252 }; 253 254 extern struct cpumem *ip6counters; 255 256 static inline void 257 ip6stat_inc(enum ip6stat_counters c) 258 { 259 counters_inc(ip6counters, c); 260 } 261 262 static inline void 263 ip6stat_add(enum ip6stat_counters c, uint64_t v) 264 { 265 counters_add(ip6counters, c, v); 266 } 267 268 /* flags passed to ip6_output as last parameter */ 269 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */ 270 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 271 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 272 273 extern int ip6_mtudisc_timeout; /* mtu discovery */ 274 extern struct rttimer_queue icmp6_mtudisc_timeout_q; 275 276 extern int ip6_defhlim; /* default hop limit */ 277 extern int ip6_defmcasthlim; /* default multicast hop limit */ 278 extern int ip6_forwarding; /* act as router? */ 279 extern int ip6_mforwarding; /* act as multicast router? */ 280 extern int ip6_multipath; /* use multipath routes */ 281 extern int ip6_sendredirect; /* send ICMPv6 redirect? */ 282 extern int ip6_use_deprecated; /* allow deprecated addr as source */ 283 extern int ip6_mcast_pmtu; /* path MTU discovery for multicast */ 284 extern int ip6_neighborgcthresh; /* Threshold # of NDP entries for GC */ 285 extern int ip6_maxdynroutes; /* Max # of routes created via redirect */ 286 287 extern struct socket *ip6_mrouter[RT_TABLEID_MAX + 1]; /* multicast routing daemon */ 288 extern int ip6_sendredirects; /* send IP redirects when forwarding? */ 289 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */ 290 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */ 291 extern int ip6_log_interval; 292 extern time_t ip6_log_time; 293 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */ 294 extern int ip6_dad_count; /* DupAddrDetectionTransmits */ 295 extern int ip6_dad_pending; /* number of currently running DADs */ 296 297 extern int ip6_auto_flowlabel; 298 299 #define IP6_SOIIKEY_LEN 16 300 extern uint8_t ip6_soiikey[IP6_SOIIKEY_LEN]; 301 302 extern const struct pr_usrreqs rip6_usrreqs; 303 304 struct inpcb; 305 struct ipsec_level; 306 307 int icmp6_ctloutput(int, struct socket *, int, int, struct mbuf *); 308 309 void ip6_init(void); 310 void ip6intr(void); 311 int ip6_input_if(struct mbuf **, int *, int, int, struct ifnet *); 312 void ip6_freepcbopts(struct ip6_pktopts *); 313 void ip6_freemoptions(struct ip6_moptions *); 314 int ip6_unknown_opt(struct mbuf **, u_int8_t *, int); 315 int ip6_get_prevhdr(struct mbuf *, int); 316 int ip6_nexthdr(struct mbuf *, int, int, int *); 317 int ip6_lasthdr(struct mbuf *, int, int, int *); 318 int ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *); 319 int ip6_process_hopopts(struct mbuf **, u_int8_t *, int, u_int32_t *, 320 u_int32_t *); 321 void ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **); 322 int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); 323 324 void ip6_forward(struct mbuf *, struct route *, int); 325 326 void ip6_mloopback(struct ifnet *, struct mbuf *, struct sockaddr_in6 *); 327 int ip6_output(struct mbuf *, struct ip6_pktopts *, struct route *, int, 328 struct ip6_moptions *, const struct ipsec_level *); 329 int ip6_fragment(struct mbuf *, struct mbuf_list *, int, u_char, u_long); 330 int ip6_ctloutput(int, struct socket *, int, int, struct mbuf *); 331 int ip6_raw_ctloutput(int, struct socket *, int, int, struct mbuf *); 332 void ip6_initpktopts(struct ip6_pktopts *); 333 int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *, 334 struct ip6_pktopts *, int, int); 335 void ip6_clearpktopts(struct ip6_pktopts *, int); 336 void ip6_randomid_init(void); 337 u_int32_t ip6_randomid(void); 338 void ip6_send(struct mbuf *); 339 340 int route6_input(struct mbuf **, int *, int, int); 341 342 void frag6_init(void); 343 int frag6_input(struct mbuf **, int *, int, int); 344 int frag6_deletefraghdr(struct mbuf *, int); 345 void frag6_slowtimo(void); 346 347 void rip6_init(void); 348 int rip6_input(struct mbuf **, int *, int, int); 349 void rip6_ctlinput(int, struct sockaddr *, u_int, void *); 350 int rip6_ctloutput(int, struct socket *, int, int, struct mbuf *); 351 int rip6_output(struct mbuf *, struct socket *, struct sockaddr *, 352 struct mbuf *); 353 int rip6_attach(struct socket *, int, int); 354 int rip6_detach(struct socket *); 355 void rip6_lock(struct socket *); 356 void rip6_unlock(struct socket *); 357 int rip6_locked(struct socket *); 358 int rip6_bind(struct socket *, struct mbuf *, struct proc *); 359 int rip6_connect(struct socket *, struct mbuf *); 360 int rip6_disconnect(struct socket *); 361 int rip6_shutdown(struct socket *); 362 int rip6_send(struct socket *, struct mbuf *, struct mbuf *, 363 struct mbuf *); 364 int rip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); 365 366 int dest6_input(struct mbuf **, int *, int, int); 367 368 int in6_pcbselsrc(const struct in6_addr **, struct sockaddr_in6 *, 369 struct inpcb *, struct ip6_pktopts *); 370 int in6_selectsrc(const struct in6_addr **, struct sockaddr_in6 *, 371 struct ip6_moptions *, unsigned int); 372 struct rtentry *in6_selectroute(const struct in6_addr *, struct ip6_pktopts *, 373 struct route *, unsigned int rtableid); 374 375 u_int32_t ip6_randomflowlabel(void); 376 377 #ifdef IPSEC 378 struct tdb; 379 int ip6_output_ipsec_lookup(struct mbuf *, const struct ipsec_level *, 380 struct tdb **); 381 int ip6_output_ipsec_send(struct tdb *, struct mbuf *, struct route *, 382 int, int); 383 #endif /* IPSEC */ 384 385 #endif /* _KERNEL */ 386 387 #endif /* !_NETINET6_IP6_VAR_H_ */ 388