ip6_var.h revision 293894
1/*- 2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the project nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $KAME: ip6_var.h,v 1.62 2001/05/03 14:51:48 itojun Exp $ 30 */ 31 32/*- 33 * Copyright (c) 1982, 1986, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 4. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)ip_var.h 8.1 (Berkeley) 6/10/93 61 * $FreeBSD: releng/10.1/sys/netinet6/ip6_var.h 293894 2016-01-14 09:11:16Z glebius $ 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 */ 71struct ip6q { 72 struct ip6asfrag *ip6q_down; 73 struct ip6asfrag *ip6q_up; 74 u_int32_t ip6q_ident; 75 u_int8_t ip6q_nxt; 76 u_int8_t ip6q_ecn; 77 u_int8_t ip6q_ttl; 78 struct in6_addr ip6q_src, ip6q_dst; 79 struct ip6q *ip6q_next; 80 struct ip6q *ip6q_prev; 81 int ip6q_unfrglen; /* len of unfragmentable part */ 82#ifdef notyet 83 u_char *ip6q_nxtp; 84#endif 85 int ip6q_nfrag; /* # of fragments */ 86 struct label *ip6q_label; 87}; 88 89struct ip6asfrag { 90 struct ip6asfrag *ip6af_down; 91 struct ip6asfrag *ip6af_up; 92 struct mbuf *ip6af_m; 93 int ip6af_offset; /* offset in ip6af_m to next header */ 94 int ip6af_frglen; /* fragmentable part length */ 95 int ip6af_off; /* fragment offset */ 96 u_int16_t ip6af_mff; /* more fragment bit in frag off */ 97}; 98 99#define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m)) 100 101/* 102 * Structure attached to inpcb.in6p_moptions and 103 * passed to ip6_output when IPv6 multicast options are in use. 104 * This structure is lazy-allocated. 105 */ 106struct ip6_moptions { 107 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */ 108 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 109 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 110 u_short im6o_num_memberships; /* no. memberships this socket */ 111 u_short im6o_max_memberships; /* max memberships this socket */ 112 struct in6_multi **im6o_membership; /* group memberships */ 113 struct in6_mfilter *im6o_mfilters; /* source filters */ 114}; 115 116/* 117 * Control options for outgoing packets 118 */ 119 120/* Routing header related info */ 121struct ip6po_rhinfo { 122 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 123 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */ 124}; 125#define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 126#define ip6po_route ip6po_rhinfo.ip6po_rhi_route 127 128/* Nexthop related info */ 129struct ip6po_nhinfo { 130 struct sockaddr *ip6po_nhi_nexthop; 131 struct route_in6 ip6po_nhi_route; /* Route to the nexthop */ 132}; 133#define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop 134#define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route 135 136struct ip6_pktopts { 137 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */ 138 int ip6po_hlim; /* Hoplimit for outgoing packets */ 139 140 /* Outgoing IF/address information */ 141 struct in6_pktinfo *ip6po_pktinfo; 142 143 /* Next-hop address information */ 144 struct ip6po_nhinfo ip6po_nhinfo; 145 146 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 147 148 /* Destination options header (before a routing header) */ 149 struct ip6_dest *ip6po_dest1; 150 151 /* Routing header related info. */ 152 struct ip6po_rhinfo ip6po_rhinfo; 153 154 /* Destination options header (after a routing header) */ 155 struct ip6_dest *ip6po_dest2; 156 157 int ip6po_tclass; /* traffic class */ 158 159 int ip6po_minmtu; /* fragment vs PMTU discovery policy */ 160#define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/ 161#define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ 162#define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ 163 164 int ip6po_prefer_tempaddr; /* whether temporary addresses are 165 preferred as source address */ 166#define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */ 167#define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */ 168#define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */ 169 170 int ip6po_flags; 171#if 0 /* parameters in this block is obsolete. do not reuse the values. */ 172#define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */ 173#define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 174#endif 175#define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ 176#define IP6PO_USECOA 0x08 /* use care of address */ 177}; 178 179/* 180 * Control options for incoming packets 181 */ 182 183struct ip6stat { 184 uint64_t ip6s_total; /* total packets received */ 185 uint64_t ip6s_tooshort; /* packet too short */ 186 uint64_t ip6s_toosmall; /* not enough data */ 187 uint64_t ip6s_fragments; /* fragments received */ 188 uint64_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 189 uint64_t ip6s_fragtimeout; /* fragments timed out */ 190 uint64_t ip6s_fragoverflow; /* fragments that exceeded limit */ 191 uint64_t ip6s_forward; /* packets forwarded */ 192 uint64_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 193 uint64_t ip6s_redirectsent; /* packets forwarded on same net */ 194 uint64_t ip6s_delivered; /* datagrams delivered to upper level*/ 195 uint64_t ip6s_localout; /* total ip packets generated here */ 196 uint64_t ip6s_odropped; /* lost packets due to nobufs, etc. */ 197 uint64_t ip6s_reassembled; /* total packets reassembled ok */ 198 uint64_t ip6s_fragmented; /* datagrams successfully fragmented */ 199 uint64_t ip6s_ofragments; /* output fragments created */ 200 uint64_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 201 uint64_t ip6s_badoptions; /* error in option processing */ 202 uint64_t ip6s_noroute; /* packets discarded due to no route */ 203 uint64_t ip6s_badvers; /* ip6 version != 6 */ 204 uint64_t ip6s_rawout; /* total raw ip packets generated */ 205 uint64_t ip6s_badscope; /* scope error */ 206 uint64_t ip6s_notmember; /* don't join this multicast group */ 207#define IP6S_HDRCNT 256 /* headers count */ 208 uint64_t ip6s_nxthist[IP6S_HDRCNT]; /* next header history */ 209 uint64_t ip6s_m1; /* one mbuf */ 210#define IP6S_M2MMAX 32 211 uint64_t ip6s_m2m[IP6S_M2MMAX]; /* two or more mbuf */ 212 uint64_t ip6s_mext1; /* one ext mbuf */ 213 uint64_t ip6s_mext2m; /* two or more ext mbuf */ 214 uint64_t ip6s_exthdrtoolong; /* ext hdr are not contiguous */ 215 uint64_t ip6s_nogif; /* no match gif found */ 216 uint64_t ip6s_toomanyhdr; /* discarded due to too many headers */ 217 218 /* 219 * statistics for improvement of the source address selection 220 * algorithm: 221 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 222 */ 223#define IP6S_RULESMAX 16 224#define IP6S_SCOPECNT 16 225 /* number of times that address selection fails */ 226 uint64_t ip6s_sources_none; 227 /* number of times that an address on the outgoing I/F is chosen */ 228 uint64_t ip6s_sources_sameif[IP6S_SCOPECNT]; 229 /* number of times that an address on a non-outgoing I/F is chosen */ 230 uint64_t ip6s_sources_otherif[IP6S_SCOPECNT]; 231 /* 232 * number of times that an address that has the same scope 233 * from the destination is chosen. 234 */ 235 uint64_t ip6s_sources_samescope[IP6S_SCOPECNT]; 236 /* 237 * number of times that an address that has a different scope 238 * from the destination is chosen. 239 */ 240 uint64_t ip6s_sources_otherscope[IP6S_SCOPECNT]; 241 /* number of times that a deprecated address is chosen */ 242 uint64_t ip6s_sources_deprecated[IP6S_SCOPECNT]; 243 244 /* number of times that each rule of source selection is applied. */ 245 uint64_t ip6s_sources_rule[IP6S_RULESMAX]; 246}; 247 248#ifdef _KERNEL 249#include <sys/counter.h> 250 251VNET_PCPUSTAT_DECLARE(struct ip6stat, ip6stat); 252#define IP6STAT_ADD(name, val) \ 253 VNET_PCPUSTAT_ADD(struct ip6stat, ip6stat, name, (val)) 254#define IP6STAT_SUB(name, val) IP6STAT_ADD(name, -(val)) 255#define IP6STAT_INC(name) IP6STAT_ADD(name, 1) 256#define IP6STAT_DEC(name) IP6STAT_SUB(name, 1) 257#endif 258 259#ifdef _KERNEL 260/* 261 * IPv6 onion peeling state. 262 * it will be initialized when we come into ip6_input(). 263 * XXX do not make it a kitchen sink! 264 */ 265struct ip6aux { 266 u_int32_t ip6a_flags; 267#define IP6A_SWAP 0x01 /* swapped home/care-of on packet */ 268#define IP6A_HASEEN 0x02 /* HA was present */ 269#define IP6A_BRUID 0x04 /* BR Unique Identifier was present */ 270#define IP6A_RTALERTSEEN 0x08 /* rtalert present */ 271 272 /* ip6.ip6_src */ 273 struct in6_addr ip6a_careof; /* care-of address of the peer */ 274 struct in6_addr ip6a_home; /* home address of the peer */ 275 u_int16_t ip6a_bruid; /* BR unique identifier */ 276 277 /* ip6.ip6_dst */ 278 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */ 279 280 /* rtalert */ 281 u_int16_t ip6a_rtalert; /* rtalert option value */ 282 283 /* 284 * decapsulation history will be here. 285 * with IPsec it may not be accurate. 286 */ 287}; 288#endif 289 290#ifdef _KERNEL 291/* flags passed to ip6_output as last parameter */ 292#define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */ 293#define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 294#define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 295 296#ifdef __NO_STRICT_ALIGNMENT 297#define IP6_HDR_ALIGNED_P(ip) 1 298#else 299#define IP6_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0) 300#endif 301 302VNET_DECLARE(int, ip6_defhlim); /* default hop limit */ 303VNET_DECLARE(int, ip6_defmcasthlim); /* default multicast hop limit */ 304VNET_DECLARE(int, ip6_forwarding); /* act as router? */ 305VNET_DECLARE(int, ip6_use_deprecated); /* allow deprecated addr as source */ 306VNET_DECLARE(int, ip6_rr_prune); /* router renumbering prefix 307 * walk list every 5 sec. */ 308VNET_DECLARE(int, ip6_mcast_pmtu); /* enable pMTU discovery for multicast? */ 309VNET_DECLARE(int, ip6_v6only); 310#define V_ip6_defhlim VNET(ip6_defhlim) 311#define V_ip6_defmcasthlim VNET(ip6_defmcasthlim) 312#define V_ip6_forwarding VNET(ip6_forwarding) 313#define V_ip6_use_deprecated VNET(ip6_use_deprecated) 314#define V_ip6_rr_prune VNET(ip6_rr_prune) 315#define V_ip6_mcast_pmtu VNET(ip6_mcast_pmtu) 316#define V_ip6_v6only VNET(ip6_v6only) 317 318VNET_DECLARE(struct socket *, ip6_mrouter); /* multicast routing daemon */ 319VNET_DECLARE(int, ip6_sendredirects); /* send IP redirects when forwarding? */ 320VNET_DECLARE(int, ip6_maxfragpackets); /* Maximum packets in reassembly 321 * queue */ 322VNET_DECLARE(int, ip6_maxfrags); /* Maximum fragments in reassembly 323 * queue */ 324VNET_DECLARE(int, ip6_accept_rtadv); /* Acts as a host not a router */ 325VNET_DECLARE(int, ip6_no_radr); /* No defroute from RA */ 326VNET_DECLARE(int, ip6_norbit_raif); /* Disable R-bit in NA on RA 327 * receiving IF. */ 328VNET_DECLARE(int, ip6_rfc6204w3); /* Accept defroute from RA even when 329 forwarding enabled */ 330VNET_DECLARE(int, ip6_keepfaith); /* Firewall Aided Internet Translator */ 331VNET_DECLARE(int, ip6_log_interval); 332VNET_DECLARE(time_t, ip6_log_time); 333VNET_DECLARE(int, ip6_hdrnestlimit); /* upper limit of # of extension 334 * headers */ 335VNET_DECLARE(int, ip6_dad_count); /* DupAddrDetectionTransmits */ 336#define V_ip6_mrouter VNET(ip6_mrouter) 337#define V_ip6_sendredirects VNET(ip6_sendredirects) 338#define V_ip6_maxfragpackets VNET(ip6_maxfragpackets) 339#define V_ip6_maxfrags VNET(ip6_maxfrags) 340#define V_ip6_accept_rtadv VNET(ip6_accept_rtadv) 341#define V_ip6_no_radr VNET(ip6_no_radr) 342#define V_ip6_norbit_raif VNET(ip6_norbit_raif) 343#define V_ip6_rfc6204w3 VNET(ip6_rfc6204w3) 344#define V_ip6_keepfaith VNET(ip6_keepfaith) 345#define V_ip6_log_interval VNET(ip6_log_interval) 346#define V_ip6_log_time VNET(ip6_log_time) 347#define V_ip6_hdrnestlimit VNET(ip6_hdrnestlimit) 348#define V_ip6_dad_count VNET(ip6_dad_count) 349 350VNET_DECLARE(int, ip6_auto_flowlabel); 351VNET_DECLARE(int, ip6_auto_linklocal); 352#define V_ip6_auto_flowlabel VNET(ip6_auto_flowlabel) 353#define V_ip6_auto_linklocal VNET(ip6_auto_linklocal) 354 355VNET_DECLARE(int, ip6_use_tempaddr); /* Whether to use temporary addresses */ 356VNET_DECLARE(int, ip6_prefer_tempaddr); /* Whether to prefer temporary 357 * addresses in the source address 358 * selection */ 359#define V_ip6_use_tempaddr VNET(ip6_use_tempaddr) 360#define V_ip6_prefer_tempaddr VNET(ip6_prefer_tempaddr) 361 362VNET_DECLARE(int, ip6_use_defzone); /* Whether to use the default scope 363 * zone when unspecified */ 364#define V_ip6_use_defzone VNET(ip6_use_defzone) 365 366VNET_DECLARE (struct pfil_head, inet6_pfil_hook); /* packet filter hooks */ 367#define V_inet6_pfil_hook VNET(inet6_pfil_hook) 368#ifdef IPSTEALTH 369VNET_DECLARE(int, ip6stealth); 370#define V_ip6stealth VNET(ip6stealth) 371#endif 372 373extern struct pr_usrreqs rip6_usrreqs; 374struct sockopt; 375 376struct inpcb; 377 378int icmp6_ctloutput(struct socket *, struct sockopt *sopt); 379 380struct in6_ifaddr; 381void ip6_init(void); 382#ifdef VIMAGE 383void ip6_destroy(void); 384#endif 385int ip6proto_register(short); 386int ip6proto_unregister(short); 387 388void ip6_input(struct mbuf *); 389struct in6_ifaddr *ip6_getdstifaddr(struct mbuf *); 390void ip6_freepcbopts(struct ip6_pktopts *); 391 392int ip6_unknown_opt(u_int8_t *, struct mbuf *, int); 393char * ip6_get_prevhdr(struct mbuf *, int); 394int ip6_nexthdr(struct mbuf *, int, int, int *); 395int ip6_lasthdr(struct mbuf *, int, int, int *); 396 397#ifdef __notyet__ 398struct ip6aux *ip6_findaux(struct mbuf *); 399#endif 400 401extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, 402 struct mbuf *); 403 404int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *, 405 u_int32_t *); 406struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *, 407 struct mbuf **, int *); 408void ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **); 409void ip6_notify_pmtu(struct inpcb *, struct sockaddr_in6 *, 410 u_int32_t *); 411int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); 412 413void ip6_forward(struct mbuf *, int); 414 415void ip6_mloopback(struct ifnet *, struct mbuf *, struct sockaddr_in6 *); 416int ip6_output(struct mbuf *, struct ip6_pktopts *, 417 struct route_in6 *, 418 int, 419 struct ip6_moptions *, struct ifnet **, 420 struct inpcb *); 421int ip6_ctloutput(struct socket *, struct sockopt *); 422int ip6_raw_ctloutput(struct socket *, struct sockopt *); 423void ip6_initpktopts(struct ip6_pktopts *); 424int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *, 425 struct ip6_pktopts *, struct ucred *, int); 426void ip6_clearpktopts(struct ip6_pktopts *, int); 427struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int); 428int ip6_optlen(struct inpcb *); 429 430int route6_input(struct mbuf **, int *, int); 431 432void frag6_init(void); 433int frag6_input(struct mbuf **, int *, int); 434void frag6_slowtimo(void); 435void frag6_drain(void); 436 437void rip6_init(void); 438int rip6_input(struct mbuf **, int *, int); 439void rip6_ctlinput(int, struct sockaddr *, void *); 440int rip6_ctloutput(struct socket *, struct sockopt *); 441int rip6_output(struct mbuf *, ...); 442int rip6_usrreq(struct socket *, 443 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *); 444 445int dest6_input(struct mbuf **, int *, int); 446int none_input(struct mbuf **, int *, int); 447 448int in6_selectsrc(struct sockaddr_in6 *, struct ip6_pktopts *, 449 struct inpcb *inp, struct route_in6 *, struct ucred *cred, 450 struct ifnet **, struct in6_addr *); 451int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *, 452 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 453 struct rtentry **); 454int in6_selectroute_fib(struct sockaddr_in6 *, struct ip6_pktopts *, 455 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 456 struct rtentry **, u_int); 457u_int32_t ip6_randomid(void); 458u_int32_t ip6_randomflowlabel(void); 459void in6_delayed_cksum(struct mbuf *m, uint32_t plen, u_short offset); 460#endif /* _KERNEL */ 461 462#endif /* !_NETINET6_IP6_VAR_H_ */ 463