1 /* $OpenBSD: ip6_var.h,v 1.86 2019/12/08 11:08:22 sashan 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 /* 68 * IP6 reassembly queue structure. Each fragment 69 * being reassembled is attached to one of these structures. 70 */ 71 struct ip6q { 72 TAILQ_ENTRY(ip6q) ip6q_queue; 73 LIST_HEAD(ip6asfrag_list, ip6asfrag) ip6q_asfrag; 74 struct in6_addr ip6q_src, ip6q_dst; 75 int ip6q_unfrglen; /* len of unfragmentable part */ 76 int ip6q_nfrag; /* # of fragments */ 77 u_int32_t ip6q_ident; /* fragment identification */ 78 u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */ 79 u_int8_t ip6q_ecn; 80 u_int8_t ip6q_ttl; /* time to live in slowtimo units */ 81 }; 82 83 struct ip6asfrag { 84 LIST_ENTRY(ip6asfrag) ip6af_list; 85 struct mbuf *ip6af_m; 86 int ip6af_offset; /* offset in ip6af_m to next header */ 87 int ip6af_frglen; /* fragmentable part length */ 88 int ip6af_off; /* fragment offset */ 89 u_int16_t ip6af_mff; /* more fragment bit in frag off */ 90 }; 91 92 struct ip6_moptions { 93 LIST_HEAD(, in6_multi_mship) im6o_memberships; 94 unsigned short im6o_ifidx; /* ifp index for outgoing multicasts */ 95 u_char im6o_hlim; /* hoplimit for outgoing multicasts */ 96 u_char im6o_loop; /* 1 >= hear sends if a member */ 97 }; 98 99 /* 100 * Control options for outgoing packets 101 */ 102 103 /* Routing header related info */ 104 struct ip6po_rhinfo { 105 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 106 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */ 107 }; 108 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 109 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route 110 111 struct ip6_pktopts { 112 /* Hoplimit for outgoing packets */ 113 int ip6po_hlim; 114 115 /* Outgoing IF/address information */ 116 struct in6_pktinfo *ip6po_pktinfo; 117 118 /* Hop-by-Hop options header */ 119 struct ip6_hbh *ip6po_hbh; 120 121 /* Destination options header (before a routing header) */ 122 struct ip6_dest *ip6po_dest1; 123 124 /* Routing header related info. */ 125 struct ip6po_rhinfo ip6po_rhinfo; 126 127 /* Destination options header (after a routing header) */ 128 struct ip6_dest *ip6po_dest2; 129 130 /* traffic class */ 131 int ip6po_tclass; 132 133 /* fragment vs PMTU discovery policy */ 134 int ip6po_minmtu; 135 #define IP6PO_MINMTU_MCASTONLY -1 /* default: send at min MTU for multicast */ 136 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ 137 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ 138 139 int ip6po_flags; 140 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ 141 }; 142 143 struct ip6stat { 144 u_int64_t ip6s_total; /* total packets received */ 145 u_int64_t ip6s_tooshort; /* packet too short */ 146 u_int64_t ip6s_toosmall; /* not enough data */ 147 u_int64_t ip6s_fragments; /* fragments received */ 148 u_int64_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 149 u_int64_t ip6s_fragtimeout; /* fragments timed out */ 150 u_int64_t ip6s_fragoverflow; /* fragments that exceeded limit */ 151 u_int64_t ip6s_forward; /* packets forwarded */ 152 u_int64_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 153 u_int64_t ip6s_redirectsent; /* packets forwarded on same net */ 154 u_int64_t ip6s_delivered; /* datagrams delivered to upper level*/ 155 u_int64_t ip6s_localout; /* total ip packets generated here */ 156 u_int64_t ip6s_odropped; /* lost packets due to nobufs, etc. */ 157 u_int64_t ip6s_reassembled; /* total packets reassembled ok */ 158 u_int64_t ip6s_fragmented; /* datagrams successfully fragmented */ 159 u_int64_t ip6s_ofragments; /* output fragments created */ 160 u_int64_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 161 u_int64_t ip6s_badoptions; /* error in option processing */ 162 u_int64_t ip6s_noroute; /* packets discarded due to no route */ 163 u_int64_t ip6s_badvers; /* ip6 version != 6 */ 164 u_int64_t ip6s_rawout; /* total raw ip packets generated */ 165 u_int64_t ip6s_badscope; /* scope error */ 166 u_int64_t ip6s_notmember; /* don't join this multicast group */ 167 u_int64_t ip6s_nxthist[256]; /* next header history */ 168 u_int64_t ip6s_m1; /* one mbuf */ 169 u_int64_t ip6s_m2m[32]; /* two or more mbuf */ 170 u_int64_t ip6s_mext1; /* one ext mbuf */ 171 u_int64_t ip6s_mext2m; /* two or more ext mbuf */ 172 u_int64_t ip6s_nogif; /* no match gif found */ 173 u_int64_t ip6s_toomanyhdr; /* discarded due to too many headers */ 174 175 /* 176 * statistics for improvement of the source address selection 177 * algorithm: 178 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 179 */ 180 /* number of times that address selection fails */ 181 u_int64_t ip6s_sources_none; 182 /* number of times that an address on the outgoing I/F is chosen */ 183 u_int64_t ip6s_sources_sameif[16]; 184 /* number of times that an address on a non-outgoing I/F is chosen */ 185 u_int64_t ip6s_sources_otherif[16]; 186 /* 187 * number of times that an address that has the same scope 188 * from the destination is chosen. 189 */ 190 u_int64_t ip6s_sources_samescope[16]; 191 /* 192 * number of times that an address that has a different scope 193 * from the destination is chosen. 194 */ 195 u_int64_t ip6s_sources_otherscope[16]; 196 /* number of times that an deprecated address is chosen */ 197 u_int64_t ip6s_sources_deprecated[16]; 198 199 u_int64_t ip6s_forward_cachehit; 200 u_int64_t ip6s_forward_cachemiss; 201 u_int64_t ip6s_wrongif; 202 }; 203 204 #ifdef _KERNEL 205 206 #include <sys/percpu.h> 207 208 enum ip6stat_counters { 209 ip6s_total, 210 ip6s_tooshort, 211 ip6s_toosmall, 212 ip6s_fragments, 213 ip6s_fragdropped, 214 ip6s_fragtimeout, 215 ip6s_fragoverflow, 216 ip6s_forward, 217 ip6s_cantforward, 218 ip6s_redirectsent, 219 ip6s_delivered, 220 ip6s_localout, 221 ip6s_odropped, 222 ip6s_reassembled, 223 ip6s_fragmented, 224 ip6s_ofragments, 225 ip6s_cantfrag, 226 ip6s_badoptions, 227 ip6s_noroute, 228 ip6s_badvers, 229 ip6s_rawout, 230 ip6s_badscope, 231 ip6s_notmember, 232 ip6s_nxthist, 233 ip6s_m1 = ip6s_nxthist + 256, 234 ip6s_m2m, 235 ip6s_mext1 = ip6s_m2m + 32, 236 ip6s_mext2m, 237 ip6s_nogif, 238 ip6s_toomanyhdr, 239 ip6s_sources_none, 240 ip6s_sources_sameif, 241 ip6s_sources_otherif = ip6s_sources_sameif + 16, 242 ip6s_sources_samescope = ip6s_sources_otherif + 16, 243 ip6s_sources_otherscope = ip6s_sources_samescope + 16, 244 ip6s_sources_deprecated = ip6s_sources_otherscope + 16, 245 ip6s_forward_cachehit = ip6s_sources_deprecated + 16, 246 ip6s_forward_cachemiss, 247 ip6s_wrongif, 248 ip6s_ncounters, 249 }; 250 251 extern struct cpumem *ip6counters; 252 253 static inline void 254 ip6stat_inc(enum ip6stat_counters c) 255 { 256 counters_inc(ip6counters, c); 257 } 258 259 static inline void 260 ip6stat_add(enum ip6stat_counters c, uint64_t v) 261 { 262 counters_add(ip6counters, c, v); 263 } 264 265 /* flags passed to ip6_output as last parameter */ 266 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */ 267 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 268 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 269 270 extern int ip6_mtudisc_timeout; /* mtu discovery */ 271 extern struct rttimer_queue *icmp6_mtudisc_timeout_q; 272 273 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_mforwarding; /* act as multicast router? */ 277 extern int ip6_multipath; /* use multipath routes */ 278 extern int ip6_sendredirect; /* send ICMPv6 redirect? */ 279 extern int ip6_use_deprecated; /* allow deprecated addr as source */ 280 extern int ip6_mcast_pmtu; /* path MTU discovery for multicast */ 281 extern int ip6_neighborgcthresh; /* Threshold # of NDP entries for GC */ 282 extern int ip6_maxdynroutes; /* Max # of routes created via redirect */ 283 284 extern struct socket *ip6_mrouter[RT_TABLEID_MAX + 1]; /* multicast routing daemon */ 285 extern int ip6_sendredirects; /* send IP redirects when forwarding? */ 286 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */ 287 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */ 288 extern int ip6_log_interval; 289 extern time_t ip6_log_time; 290 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */ 291 extern int ip6_dad_count; /* DupAddrDetectionTransmits */ 292 extern int ip6_dad_pending; /* number of currently running DADs */ 293 294 extern int ip6_auto_flowlabel; 295 extern int ip6_auto_linklocal; 296 297 #define IP6_SOIIKEY_LEN 16 298 extern uint8_t ip6_soiikey[IP6_SOIIKEY_LEN]; 299 300 struct in6pcb; 301 struct inpcb; 302 303 int icmp6_ctloutput(int, struct socket *, int, int, struct mbuf *); 304 305 void ip6_init(void); 306 void ip6intr(void); 307 int ip6_input_if(struct mbuf **, int *, int, int, struct ifnet *); 308 void ip6_freepcbopts(struct ip6_pktopts *); 309 void ip6_freemoptions(struct ip6_moptions *); 310 int ip6_unknown_opt(u_int8_t *, struct mbuf *, int); 311 int ip6_get_prevhdr(struct mbuf *, int); 312 int ip6_nexthdr(struct mbuf *, int, int, int *); 313 int ip6_lasthdr(struct mbuf *, int, int, int *); 314 int ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *); 315 int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *, 316 u_int32_t *); 317 void ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **); 318 int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); 319 320 void ip6_forward(struct mbuf *, struct rtentry *, int); 321 322 void ip6_mloopback(struct ifnet *, struct mbuf *, struct sockaddr_in6 *); 323 int ip6_output(struct mbuf *, struct ip6_pktopts *, struct route_in6 *, int, 324 struct ip6_moptions *, struct inpcb *); 325 int ip6_fragment(struct mbuf *, int, u_char, u_long); 326 int ip6_ctloutput(int, struct socket *, int, int, struct mbuf *); 327 int ip6_raw_ctloutput(int, struct socket *, int, int, struct mbuf *); 328 void ip6_initpktopts(struct ip6_pktopts *); 329 int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *, 330 struct ip6_pktopts *, int, int); 331 void ip6_clearpktopts(struct ip6_pktopts *, int); 332 void ip6_randomid_init(void); 333 u_int32_t ip6_randomid(void); 334 void ip6_send(struct mbuf *); 335 336 int route6_input(struct mbuf **, int *, int, int); 337 338 void frag6_init(void); 339 int frag6_input(struct mbuf **, int *, int, int); 340 int frag6_deletefraghdr(struct mbuf *, int); 341 void frag6_slowtimo(void); 342 343 void rip6_init(void); 344 int rip6_input(struct mbuf **, int *, int, int); 345 void rip6_ctlinput(int, struct sockaddr *, u_int, void *); 346 int rip6_ctloutput(int, struct socket *, int, int, struct mbuf *); 347 int rip6_output(struct mbuf *, struct socket *, struct sockaddr *, 348 struct mbuf *); 349 int rip6_usrreq(struct socket *, 350 int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *); 351 int rip6_attach(struct socket *, int); 352 int rip6_detach(struct socket *); 353 int rip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); 354 355 int dest6_input(struct mbuf **, int *, int, int); 356 int none_input(struct mbuf **, int *, int); 357 358 int in6_pcbselsrc(struct in6_addr **, struct sockaddr_in6 *, 359 struct inpcb *, struct ip6_pktopts *); 360 int in6_selectsrc(struct in6_addr **, struct sockaddr_in6 *, 361 struct ip6_moptions *, unsigned int); 362 struct rtentry *in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *, 363 struct route_in6 *, unsigned int rtableid); 364 365 u_int32_t ip6_randomflowlabel(void); 366 367 #ifdef IPSEC 368 struct tdb; 369 struct tdb * 370 ip6_output_ipsec_lookup(struct mbuf *, int *, struct inpcb *); 371 int ip6_output_ipsec_send(struct tdb *, struct mbuf *, int, int); 372 #endif /* IPSEC */ 373 374 #endif /* _KERNEL */ 375 376 #endif /* !_NETINET6_IP6_VAR_H_ */ 377