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: stable/11/sys/netinet6/ip6_var.h 337799 2018-08-14 18:10:25Z jtl $ 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 * IP6 reinjecting structure. 103 */ 104struct ip6_direct_ctx { 105 uint32_t ip6dc_nxt; /* next header to process */ 106 uint32_t ip6dc_off; /* offset to next header */ 107}; 108 109/* 110 * Structure attached to inpcb.in6p_moptions and 111 * passed to ip6_output when IPv6 multicast options are in use. 112 * This structure is lazy-allocated. 113 */ 114struct ip6_moptions { 115 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */ 116 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 117 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 118 u_short im6o_num_memberships; /* no. memberships this socket */ 119 u_short im6o_max_memberships; /* max memberships this socket */ 120 struct in6_multi **im6o_membership; /* group memberships */ 121 struct in6_mfilter *im6o_mfilters; /* source filters */ 122}; 123 124/* 125 * Control options for outgoing packets 126 */ 127 128/* Routing header related info */ 129struct ip6po_rhinfo { 130 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 131 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */ 132}; 133#define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 134#define ip6po_route ip6po_rhinfo.ip6po_rhi_route 135 136/* Nexthop related info */ 137struct ip6po_nhinfo { 138 struct sockaddr *ip6po_nhi_nexthop; 139 struct route_in6 ip6po_nhi_route; /* Route to the nexthop */ 140}; 141#define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop 142#define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route 143 144struct ip6_pktopts { 145 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */ 146 int ip6po_hlim; /* Hoplimit for outgoing packets */ 147 148 /* Outgoing IF/address information */ 149 struct in6_pktinfo *ip6po_pktinfo; 150 151 /* Next-hop address information */ 152 struct ip6po_nhinfo ip6po_nhinfo; 153 154 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 155 156 /* Destination options header (before a routing header) */ 157 struct ip6_dest *ip6po_dest1; 158 159 /* Routing header related info. */ 160 struct ip6po_rhinfo ip6po_rhinfo; 161 162 /* Destination options header (after a routing header) */ 163 struct ip6_dest *ip6po_dest2; 164 165 int ip6po_tclass; /* traffic class */ 166 167 int ip6po_minmtu; /* fragment vs PMTU discovery policy */ 168#define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/ 169#define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ 170#define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ 171 172 int ip6po_prefer_tempaddr; /* whether temporary addresses are 173 preferred as source address */ 174#define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */ 175#define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */ 176#define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */ 177 178 int ip6po_flags; 179#if 0 /* parameters in this block is obsolete. do not reuse the values. */ 180#define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */ 181#define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 182#endif 183#define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ 184#define IP6PO_USECOA 0x08 /* use care of address */ 185}; 186 187/* 188 * Control options for incoming packets 189 */ 190 191struct ip6stat { 192 uint64_t ip6s_total; /* total packets received */ 193 uint64_t ip6s_tooshort; /* packet too short */ 194 uint64_t ip6s_toosmall; /* not enough data */ 195 uint64_t ip6s_fragments; /* fragments received */ 196 uint64_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 197 uint64_t ip6s_fragtimeout; /* fragments timed out */ 198 uint64_t ip6s_fragoverflow; /* fragments that exceeded limit */ 199 uint64_t ip6s_forward; /* packets forwarded */ 200 uint64_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 201 uint64_t ip6s_redirectsent; /* packets forwarded on same net */ 202 uint64_t ip6s_delivered; /* datagrams delivered to upper level*/ 203 uint64_t ip6s_localout; /* total ip packets generated here */ 204 uint64_t ip6s_odropped; /* lost packets due to nobufs, etc. */ 205 uint64_t ip6s_reassembled; /* total packets reassembled ok */ 206 uint64_t ip6s_fragmented; /* datagrams successfully fragmented */ 207 uint64_t ip6s_ofragments; /* output fragments created */ 208 uint64_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 209 uint64_t ip6s_badoptions; /* error in option processing */ 210 uint64_t ip6s_noroute; /* packets discarded due to no route */ 211 uint64_t ip6s_badvers; /* ip6 version != 6 */ 212 uint64_t ip6s_rawout; /* total raw ip packets generated */ 213 uint64_t ip6s_badscope; /* scope error */ 214 uint64_t ip6s_notmember; /* don't join this multicast group */ 215#define IP6S_HDRCNT 256 /* headers count */ 216 uint64_t ip6s_nxthist[IP6S_HDRCNT]; /* next header history */ 217 uint64_t ip6s_m1; /* one mbuf */ 218#define IP6S_M2MMAX 32 219 uint64_t ip6s_m2m[IP6S_M2MMAX]; /* two or more mbuf */ 220 uint64_t ip6s_mext1; /* one ext mbuf */ 221 uint64_t ip6s_mext2m; /* two or more ext mbuf */ 222 uint64_t ip6s_exthdrtoolong; /* ext hdr are not contiguous */ 223 uint64_t ip6s_nogif; /* no match gif found */ 224 uint64_t ip6s_toomanyhdr; /* discarded due to too many headers */ 225 226 /* 227 * statistics for improvement of the source address selection 228 * algorithm: 229 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 230 */ 231#define IP6S_RULESMAX 16 232#define IP6S_SCOPECNT 16 233 /* number of times that address selection fails */ 234 uint64_t ip6s_sources_none; 235 /* number of times that an address on the outgoing I/F is chosen */ 236 uint64_t ip6s_sources_sameif[IP6S_SCOPECNT]; 237 /* number of times that an address on a non-outgoing I/F is chosen */ 238 uint64_t ip6s_sources_otherif[IP6S_SCOPECNT]; 239 /* 240 * number of times that an address that has the same scope 241 * from the destination is chosen. 242 */ 243 uint64_t ip6s_sources_samescope[IP6S_SCOPECNT]; 244 /* 245 * number of times that an address that has a different scope 246 * from the destination is chosen. 247 */ 248 uint64_t ip6s_sources_otherscope[IP6S_SCOPECNT]; 249 /* number of times that a deprecated address is chosen */ 250 uint64_t ip6s_sources_deprecated[IP6S_SCOPECNT]; 251 252 /* number of times that each rule of source selection is applied. */ 253 uint64_t ip6s_sources_rule[IP6S_RULESMAX]; 254}; 255 256#ifdef _KERNEL 257#include <sys/counter.h> 258 259VNET_PCPUSTAT_DECLARE(struct ip6stat, ip6stat); 260#define IP6STAT_ADD(name, val) \ 261 VNET_PCPUSTAT_ADD(struct ip6stat, ip6stat, name, (val)) 262#define IP6STAT_SUB(name, val) IP6STAT_ADD(name, -(val)) 263#define IP6STAT_INC(name) IP6STAT_ADD(name, 1) 264#define IP6STAT_DEC(name) IP6STAT_SUB(name, 1) 265#endif 266 267#ifdef _KERNEL 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#ifdef __NO_STRICT_ALIGNMENT 274#define IP6_HDR_ALIGNED_P(ip) 1 275#else 276#define IP6_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0) 277#endif 278 279VNET_DECLARE(int, ip6_defhlim); /* default hop limit */ 280VNET_DECLARE(int, ip6_defmcasthlim); /* default multicast hop limit */ 281VNET_DECLARE(int, ip6_forwarding); /* act as router? */ 282VNET_DECLARE(int, ip6_use_deprecated); /* allow deprecated addr as source */ 283VNET_DECLARE(int, ip6_rr_prune); /* router renumbering prefix 284 * walk list every 5 sec. */ 285VNET_DECLARE(int, ip6_mcast_pmtu); /* enable pMTU discovery for multicast? */ 286VNET_DECLARE(int, ip6_v6only); 287#define V_ip6_defhlim VNET(ip6_defhlim) 288#define V_ip6_defmcasthlim VNET(ip6_defmcasthlim) 289#define V_ip6_forwarding VNET(ip6_forwarding) 290#define V_ip6_use_deprecated VNET(ip6_use_deprecated) 291#define V_ip6_rr_prune VNET(ip6_rr_prune) 292#define V_ip6_mcast_pmtu VNET(ip6_mcast_pmtu) 293#define V_ip6_v6only VNET(ip6_v6only) 294 295VNET_DECLARE(struct socket *, ip6_mrouter); /* multicast routing daemon */ 296VNET_DECLARE(int, ip6_sendredirects); /* send IP redirects when forwarding? */ 297VNET_DECLARE(int, ip6_maxfragpackets); /* Maximum packets in reassembly 298 * queue */ 299extern int ip6_maxfrags; /* Maximum fragments in reassembly 300 * queue */ 301VNET_DECLARE(int, ip6_maxfragbucketsize); /* Maximum reassembly queues per bucket */ 302VNET_DECLARE(int, ip6_maxfragsperpacket); /* Maximum fragments per packet */ 303VNET_DECLARE(int, ip6_accept_rtadv); /* Acts as a host not a router */ 304VNET_DECLARE(int, ip6_no_radr); /* No defroute from RA */ 305VNET_DECLARE(int, ip6_norbit_raif); /* Disable R-bit in NA on RA 306 * receiving IF. */ 307VNET_DECLARE(int, ip6_rfc6204w3); /* Accept defroute from RA even when 308 forwarding enabled */ 309VNET_DECLARE(int, ip6_log_interval); 310VNET_DECLARE(time_t, ip6_log_time); 311VNET_DECLARE(int, ip6_hdrnestlimit); /* upper limit of # of extension 312 * headers */ 313VNET_DECLARE(int, ip6_dad_count); /* DupAddrDetectionTransmits */ 314#define V_ip6_mrouter VNET(ip6_mrouter) 315#define V_ip6_sendredirects VNET(ip6_sendredirects) 316#define V_ip6_maxfragpackets VNET(ip6_maxfragpackets) 317#define V_ip6_maxfragbucketsize VNET(ip6_maxfragbucketsize) 318#define V_ip6_maxfragsperpacket VNET(ip6_maxfragsperpacket) 319#define V_ip6_accept_rtadv VNET(ip6_accept_rtadv) 320#define V_ip6_no_radr VNET(ip6_no_radr) 321#define V_ip6_norbit_raif VNET(ip6_norbit_raif) 322#define V_ip6_rfc6204w3 VNET(ip6_rfc6204w3) 323#define V_ip6_log_interval VNET(ip6_log_interval) 324#define V_ip6_log_time VNET(ip6_log_time) 325#define V_ip6_hdrnestlimit VNET(ip6_hdrnestlimit) 326#define V_ip6_dad_count VNET(ip6_dad_count) 327 328VNET_DECLARE(int, ip6_auto_flowlabel); 329VNET_DECLARE(int, ip6_auto_linklocal); 330#define V_ip6_auto_flowlabel VNET(ip6_auto_flowlabel) 331#define V_ip6_auto_linklocal VNET(ip6_auto_linklocal) 332 333VNET_DECLARE(int, ip6_use_tempaddr); /* Whether to use temporary addresses */ 334VNET_DECLARE(int, ip6_prefer_tempaddr); /* Whether to prefer temporary 335 * addresses in the source address 336 * selection */ 337#define V_ip6_use_tempaddr VNET(ip6_use_tempaddr) 338#define V_ip6_prefer_tempaddr VNET(ip6_prefer_tempaddr) 339 340VNET_DECLARE(int, ip6_use_defzone); /* Whether to use the default scope 341 * zone when unspecified */ 342#define V_ip6_use_defzone VNET(ip6_use_defzone) 343 344VNET_DECLARE (struct pfil_head, inet6_pfil_hook); /* packet filter hooks */ 345#define V_inet6_pfil_hook VNET(inet6_pfil_hook) 346#ifdef IPSTEALTH 347VNET_DECLARE(int, ip6stealth); 348#define V_ip6stealth VNET(ip6stealth) 349#endif 350 351extern struct pr_usrreqs rip6_usrreqs; 352struct sockopt; 353 354struct inpcb; 355 356int icmp6_ctloutput(struct socket *, struct sockopt *sopt); 357 358struct in6_ifaddr; 359void ip6_init(void); 360int ip6proto_register(short); 361int ip6proto_unregister(short); 362 363void ip6_input(struct mbuf *); 364void ip6_direct_input(struct mbuf *); 365void ip6_freepcbopts(struct ip6_pktopts *); 366 367int ip6_unknown_opt(u_int8_t *, struct mbuf *, int); 368int ip6_get_prevhdr(const struct mbuf *, int); 369int ip6_nexthdr(const struct mbuf *, int, int, int *); 370int ip6_lasthdr(const struct mbuf *, int, int, int *); 371 372extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, 373 struct mbuf *); 374 375int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *, 376 u_int32_t *); 377struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *, 378 struct mbuf **, int *); 379void ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **); 380void ip6_notify_pmtu(struct inpcb *, struct sockaddr_in6 *, u_int32_t); 381int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); 382 383void ip6_forward(struct mbuf *, int); 384 385void ip6_mloopback(struct ifnet *, struct mbuf *); 386int ip6_output(struct mbuf *, struct ip6_pktopts *, 387 struct route_in6 *, 388 int, 389 struct ip6_moptions *, struct ifnet **, 390 struct inpcb *); 391int ip6_ctloutput(struct socket *, struct sockopt *); 392int ip6_raw_ctloutput(struct socket *, struct sockopt *); 393void ip6_initpktopts(struct ip6_pktopts *); 394int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *, 395 struct ip6_pktopts *, struct ucred *, int); 396void ip6_clearpktopts(struct ip6_pktopts *, int); 397struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int); 398int ip6_optlen(struct inpcb *); 399int ip6_deletefraghdr(struct mbuf *, int, int); 400int ip6_fragment(struct ifnet *, struct mbuf *, int, u_char, int, 401 uint32_t); 402 403int route6_input(struct mbuf **, int *, int); 404 405void frag6_set_bucketsize(void); 406void frag6_init(void); 407int frag6_input(struct mbuf **, int *, int); 408void frag6_slowtimo(void); 409void frag6_drain(void); 410 411void rip6_init(void); 412int rip6_input(struct mbuf **, int *, int); 413void rip6_ctlinput(int, struct sockaddr *, void *); 414int rip6_ctloutput(struct socket *, struct sockopt *); 415int rip6_output(struct mbuf *, struct socket *, ...); 416int rip6_usrreq(struct socket *, 417 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *); 418 419int dest6_input(struct mbuf **, int *, int); 420int none_input(struct mbuf **, int *, int); 421 422int in6_selectsrc_socket(struct sockaddr_in6 *, struct ip6_pktopts *, 423 struct inpcb *, struct ucred *, int, struct in6_addr *, int *); 424int in6_selectsrc_addr(uint32_t, const struct in6_addr *, 425 uint32_t, struct ifnet *, struct in6_addr *, int *); 426int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *, 427 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 428 struct rtentry **); 429int in6_selectroute_fib(struct sockaddr_in6 *, struct ip6_pktopts *, 430 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 431 struct rtentry **, u_int); 432u_int32_t ip6_randomid(void); 433u_int32_t ip6_randomflowlabel(void); 434void in6_delayed_cksum(struct mbuf *m, uint32_t plen, u_short offset); 435#endif /* _KERNEL */ 436 437#endif /* !_NETINET6_IP6_VAR_H_ */ 438