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 * $FreeBSD$ 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 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 89 struct 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 */ 106 struct 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 */ 121 struct 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 */ 129 struct 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 135 136 struct 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 */ 182 183 struct 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> 250 251 VNET_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 /* flags passed to ip6_output as last parameter */ 261 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */ 262 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 263 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 264 265 #ifdef __NO_STRICT_ALIGNMENT 266 #define IP6_HDR_ALIGNED_P(ip) 1 267 #else 268 #define IP6_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0) 269 #endif 270 271 VNET_DECLARE(int, ip6_defhlim); /* default hop limit */ 272 VNET_DECLARE(int, ip6_defmcasthlim); /* default multicast hop limit */ 273 VNET_DECLARE(int, ip6_forwarding); /* act as router? */ 274 VNET_DECLARE(int, ip6_use_deprecated); /* allow deprecated addr as source */ 275 VNET_DECLARE(int, ip6_rr_prune); /* router renumbering prefix 276 * walk list every 5 sec. */ 277 VNET_DECLARE(int, ip6_mcast_pmtu); /* enable pMTU discovery for multicast? */ 278 VNET_DECLARE(int, ip6_v6only); 279 #define V_ip6_defhlim VNET(ip6_defhlim) 280 #define V_ip6_defmcasthlim VNET(ip6_defmcasthlim) 281 #define V_ip6_forwarding VNET(ip6_forwarding) 282 #define V_ip6_use_deprecated VNET(ip6_use_deprecated) 283 #define V_ip6_rr_prune VNET(ip6_rr_prune) 284 #define V_ip6_mcast_pmtu VNET(ip6_mcast_pmtu) 285 #define V_ip6_v6only VNET(ip6_v6only) 286 287 VNET_DECLARE(struct socket *, ip6_mrouter); /* multicast routing daemon */ 288 VNET_DECLARE(int, ip6_sendredirects); /* send IP redirects when forwarding? */ 289 VNET_DECLARE(int, ip6_maxfragpackets); /* Maximum packets in reassembly 290 * queue */ 291 VNET_DECLARE(int, ip6_maxfrags); /* Maximum fragments in reassembly 292 * queue */ 293 VNET_DECLARE(int, ip6_accept_rtadv); /* Acts as a host not a router */ 294 VNET_DECLARE(int, ip6_no_radr); /* No defroute from RA */ 295 VNET_DECLARE(int, ip6_norbit_raif); /* Disable R-bit in NA on RA 296 * receiving IF. */ 297 VNET_DECLARE(int, ip6_rfc6204w3); /* Accept defroute from RA even when 298 forwarding enabled */ 299 VNET_DECLARE(int, ip6_log_interval); 300 VNET_DECLARE(time_t, ip6_log_time); 301 VNET_DECLARE(int, ip6_hdrnestlimit); /* upper limit of # of extension 302 * headers */ 303 VNET_DECLARE(int, ip6_dad_count); /* DupAddrDetectionTransmits */ 304 #define V_ip6_mrouter VNET(ip6_mrouter) 305 #define V_ip6_sendredirects VNET(ip6_sendredirects) 306 #define V_ip6_maxfragpackets VNET(ip6_maxfragpackets) 307 #define V_ip6_maxfrags VNET(ip6_maxfrags) 308 #define V_ip6_accept_rtadv VNET(ip6_accept_rtadv) 309 #define V_ip6_no_radr VNET(ip6_no_radr) 310 #define V_ip6_norbit_raif VNET(ip6_norbit_raif) 311 #define V_ip6_rfc6204w3 VNET(ip6_rfc6204w3) 312 #define V_ip6_log_interval VNET(ip6_log_interval) 313 #define V_ip6_log_time VNET(ip6_log_time) 314 #define V_ip6_hdrnestlimit VNET(ip6_hdrnestlimit) 315 #define V_ip6_dad_count VNET(ip6_dad_count) 316 317 VNET_DECLARE(int, ip6_auto_flowlabel); 318 VNET_DECLARE(int, ip6_auto_linklocal); 319 #define V_ip6_auto_flowlabel VNET(ip6_auto_flowlabel) 320 #define V_ip6_auto_linklocal VNET(ip6_auto_linklocal) 321 322 VNET_DECLARE(int, ip6_use_tempaddr); /* Whether to use temporary addresses */ 323 VNET_DECLARE(int, ip6_prefer_tempaddr); /* Whether to prefer temporary 324 * addresses in the source address 325 * selection */ 326 #define V_ip6_use_tempaddr VNET(ip6_use_tempaddr) 327 #define V_ip6_prefer_tempaddr VNET(ip6_prefer_tempaddr) 328 329 VNET_DECLARE(int, ip6_use_defzone); /* Whether to use the default scope 330 * zone when unspecified */ 331 #define V_ip6_use_defzone VNET(ip6_use_defzone) 332 333 VNET_DECLARE (struct pfil_head, inet6_pfil_hook); /* packet filter hooks */ 334 #define V_inet6_pfil_hook VNET(inet6_pfil_hook) 335 #ifdef IPSTEALTH 336 VNET_DECLARE(int, ip6stealth); 337 #define V_ip6stealth VNET(ip6stealth) 338 #endif 339 340 extern struct pr_usrreqs rip6_usrreqs; 341 struct sockopt; 342 343 struct inpcb; 344 345 int icmp6_ctloutput(struct socket *, struct sockopt *sopt); 346 347 struct in6_ifaddr; 348 void ip6_init(void); 349 #ifdef VIMAGE 350 void ip6_destroy(void); 351 #endif 352 int ip6proto_register(short); 353 int ip6proto_unregister(short); 354 355 void ip6_input(struct mbuf *); 356 void ip6_freepcbopts(struct ip6_pktopts *); 357 358 int ip6_unknown_opt(u_int8_t *, struct mbuf *, int); 359 char * ip6_get_prevhdr(const struct mbuf *, int); 360 int ip6_nexthdr(const struct mbuf *, int, int, int *); 361 int ip6_lasthdr(const struct mbuf *, int, int, int *); 362 363 extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, 364 struct mbuf *); 365 366 int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *, 367 u_int32_t *); 368 struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *, 369 struct mbuf **, int *); 370 void ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **); 371 void ip6_notify_pmtu(struct inpcb *, struct sockaddr_in6 *, u_int32_t); 372 int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); 373 374 void ip6_forward(struct mbuf *, int); 375 376 void ip6_mloopback(struct ifnet *, const struct mbuf *); 377 int ip6_output(struct mbuf *, struct ip6_pktopts *, 378 struct route_in6 *, 379 int, 380 struct ip6_moptions *, struct ifnet **, 381 struct inpcb *); 382 int ip6_ctloutput(struct socket *, struct sockopt *); 383 int ip6_raw_ctloutput(struct socket *, struct sockopt *); 384 void ip6_initpktopts(struct ip6_pktopts *); 385 int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *, 386 struct ip6_pktopts *, struct ucred *, int); 387 void ip6_clearpktopts(struct ip6_pktopts *, int); 388 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int); 389 int ip6_optlen(struct inpcb *); 390 int ip6_deletefraghdr(struct mbuf *, int, int); 391 int ip6_fragment(struct ifnet *, struct mbuf *, int, u_char, int, 392 uint32_t); 393 394 int route6_input(struct mbuf **, int *, int); 395 396 void frag6_init(void); 397 int frag6_input(struct mbuf **, int *, int); 398 void frag6_slowtimo(void); 399 void frag6_drain(void); 400 401 void rip6_init(void); 402 int rip6_input(struct mbuf **, int *, int); 403 void rip6_ctlinput(int, struct sockaddr *, void *); 404 int rip6_ctloutput(struct socket *, struct sockopt *); 405 int rip6_output(struct mbuf *, struct socket *, ...); 406 int rip6_usrreq(struct socket *, 407 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *); 408 409 int dest6_input(struct mbuf **, int *, int); 410 int none_input(struct mbuf **, int *, int); 411 412 int in6_selectsrc(struct sockaddr_in6 *, struct ip6_pktopts *, 413 struct inpcb *inp, struct route_in6 *, struct ucred *cred, 414 struct ifnet **, struct in6_addr *); 415 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *, 416 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 417 struct rtentry **); 418 int in6_selectroute_fib(struct sockaddr_in6 *, struct ip6_pktopts *, 419 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 420 struct rtentry **, u_int); 421 u_int32_t ip6_randomid(void); 422 u_int32_t ip6_randomflowlabel(void); 423 void in6_delayed_cksum(struct mbuf *m, uint32_t plen, u_short offset); 424 #endif /* _KERNEL */ 425 426 #endif /* !_NETINET6_IP6_VAR_H_ */ 427