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 u_quad_t ip6s_total; /* total packets received */ 185 u_quad_t ip6s_tooshort; /* packet too short */ 186 u_quad_t ip6s_toosmall; /* not enough data */ 187 u_quad_t ip6s_fragments; /* fragments received */ 188 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 189 u_quad_t ip6s_fragtimeout; /* fragments timed out */ 190 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */ 191 u_quad_t ip6s_forward; /* packets forwarded */ 192 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 193 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */ 194 u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/ 195 u_quad_t ip6s_localout; /* total ip packets generated here */ 196 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */ 197 u_quad_t ip6s_reassembled; /* total packets reassembled ok */ 198 u_quad_t ip6s_fragmented; /* datagrams successfully fragmented */ 199 u_quad_t ip6s_ofragments; /* output fragments created */ 200 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 201 u_quad_t ip6s_badoptions; /* error in option processing */ 202 u_quad_t ip6s_noroute; /* packets discarded due to no route */ 203 u_quad_t ip6s_badvers; /* ip6 version != 6 */ 204 u_quad_t ip6s_rawout; /* total raw ip packets generated */ 205 u_quad_t ip6s_badscope; /* scope error */ 206 u_quad_t ip6s_notmember; /* don't join this multicast group */ 207 u_quad_t ip6s_nxthist[256]; /* next header history */ 208 u_quad_t ip6s_m1; /* one mbuf */ 209 u_quad_t ip6s_m2m[32]; /* two or more mbuf */ 210 u_quad_t ip6s_mext1; /* one ext mbuf */ 211 u_quad_t ip6s_mext2m; /* two or more ext mbuf */ 212 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */ 213 u_quad_t ip6s_nogif; /* no match gif found */ 214 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */ 215 216 /* 217 * statistics for improvement of the source address selection 218 * algorithm: 219 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 220 */ 221 /* number of times that address selection fails */ 222 u_quad_t ip6s_sources_none; 223 /* number of times that an address on the outgoing I/F is chosen */ 224 u_quad_t ip6s_sources_sameif[16]; 225 /* number of times that an address on a non-outgoing I/F is chosen */ 226 u_quad_t ip6s_sources_otherif[16]; 227 /* 228 * number of times that an address that has the same scope 229 * from the destination is chosen. 230 */ 231 u_quad_t ip6s_sources_samescope[16]; 232 /* 233 * number of times that an address that has a different scope 234 * from the destination is chosen. 235 */ 236 u_quad_t ip6s_sources_otherscope[16]; 237 /* number of times that a deprecated address is chosen */ 238 u_quad_t ip6s_sources_deprecated[16]; 239 240 /* number of times that each rule of source selection is applied. */ 241 u_quad_t ip6s_sources_rule[16]; 242 }; 243 244 #ifdef _KERNEL 245 #define IP6STAT_ADD(name, val) V_ip6stat.name += (val) 246 #define IP6STAT_SUB(name, val) V_ip6stat.name -= (val) 247 #define IP6STAT_INC(name) IP6STAT_ADD(name, 1) 248 #define IP6STAT_DEC(name) IP6STAT_SUB(name, 1) 249 #endif 250 251 #ifdef _KERNEL 252 /* 253 * IPv6 onion peeling state. 254 * it will be initialized when we come into ip6_input(). 255 * XXX do not make it a kitchen sink! 256 */ 257 struct ip6aux { 258 u_int32_t ip6a_flags; 259 #define IP6A_SWAP 0x01 /* swapped home/care-of on packet */ 260 #define IP6A_HASEEN 0x02 /* HA was present */ 261 #define IP6A_BRUID 0x04 /* BR Unique Identifier was present */ 262 #define IP6A_RTALERTSEEN 0x08 /* rtalert present */ 263 264 /* ip6.ip6_src */ 265 struct in6_addr ip6a_careof; /* care-of address of the peer */ 266 struct in6_addr ip6a_home; /* home address of the peer */ 267 u_int16_t ip6a_bruid; /* BR unique identifier */ 268 269 /* ip6.ip6_dst */ 270 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */ 271 272 /* rtalert */ 273 u_int16_t ip6a_rtalert; /* rtalert option value */ 274 275 /* 276 * decapsulation history will be here. 277 * with IPsec it may not be accurate. 278 */ 279 }; 280 #endif 281 282 #ifdef _KERNEL 283 /* flags passed to ip6_output as last parameter */ 284 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */ 285 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 286 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 287 288 #ifdef __NO_STRICT_ALIGNMENT 289 #define IP6_HDR_ALIGNED_P(ip) 1 290 #else 291 #define IP6_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0) 292 #endif 293 294 #ifdef VIMAGE_GLOBALS 295 extern struct ip6stat ip6stat; /* statistics */ 296 extern int ip6_defhlim; /* default hop limit */ 297 extern int ip6_defmcasthlim; /* default multicast hop limit */ 298 extern int ip6_forwarding; /* act as router? */ 299 extern int ip6_gif_hlim; /* Hop limit for gif encap packet */ 300 extern int ip6_use_deprecated; /* allow deprecated addr as source */ 301 extern int ip6_rr_prune; /* router renumbering prefix 302 * walk list every 5 sec. */ 303 extern int ip6_mcast_pmtu; /* enable pMTU discovery for multicast? */ 304 extern int ip6_v6only; 305 extern struct socket *ip6_mrouter; /* multicast routing daemon */ 306 extern int ip6_sendredirects; /* send IP redirects when forwarding? */ 307 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */ 308 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */ 309 extern int ip6_accept_rtadv; /* Acts as a host not a router */ 310 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */ 311 extern int ip6_log_interval; 312 extern time_t ip6_log_time; 313 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */ 314 extern int ip6_dad_count; /* DupAddrDetectionTransmits */ 315 316 extern int ip6_auto_flowlabel; 317 extern int ip6_auto_linklocal; 318 319 extern int ip6_use_tempaddr; /* whether to use temporary addresses. */ 320 extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses 321 in the source address selection */ 322 323 #ifdef IPSTEALTH 324 extern int ip6stealth; 325 #endif 326 327 extern int ip6_use_defzone; /* whether to use the default scope zone 328 when unspecified */ 329 #endif /* VIMAGE_GLOBALS */ 330 331 extern struct pfil_head inet6_pfil_hook; /* packet filter hooks */ 332 333 extern struct pr_usrreqs rip6_usrreqs; 334 struct sockopt; 335 336 struct inpcb; 337 338 int icmp6_ctloutput __P((struct socket *, struct sockopt *sopt)); 339 340 struct in6_ifaddr; 341 void ip6_init __P((void)); 342 #ifdef VIMAGE 343 void ip6_destroy __P((void)); 344 #endif 345 void ip6_input __P((struct mbuf *)); 346 struct in6_ifaddr *ip6_getdstifaddr __P((struct mbuf *)); 347 void ip6_freepcbopts __P((struct ip6_pktopts *)); 348 349 int ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int)); 350 char * ip6_get_prevhdr __P((struct mbuf *, int)); 351 int ip6_nexthdr __P((struct mbuf *, int, int, int *)); 352 int ip6_lasthdr __P((struct mbuf *, int, int, int *)); 353 354 struct ip6aux *ip6_addaux __P((struct mbuf *)); 355 struct ip6aux *ip6_findaux __P((struct mbuf *)); 356 void ip6_delaux __P((struct mbuf *)); 357 358 extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, 359 struct mbuf *); 360 361 int ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *, 362 u_int32_t *)); 363 struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *, 364 struct mbuf **, int *); 365 void ip6_savecontrol __P((struct inpcb *, struct mbuf *, struct mbuf **)); 366 void ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *, 367 u_int32_t *)); 368 int ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t)); 369 370 void ip6_forward __P((struct mbuf *, int)); 371 372 void ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *)); 373 int ip6_output __P((struct mbuf *, struct ip6_pktopts *, 374 struct route_in6 *, 375 int, 376 struct ip6_moptions *, struct ifnet **, 377 struct inpcb *)); 378 int ip6_ctloutput __P((struct socket *, struct sockopt *)); 379 int ip6_raw_ctloutput __P((struct socket *, struct sockopt *)); 380 void ip6_initpktopts __P((struct ip6_pktopts *)); 381 int ip6_setpktopts __P((struct mbuf *, struct ip6_pktopts *, 382 struct ip6_pktopts *, struct ucred *, int)); 383 void ip6_clearpktopts __P((struct ip6_pktopts *, int)); 384 struct ip6_pktopts *ip6_copypktopts __P((struct ip6_pktopts *, int)); 385 int ip6_optlen __P((struct inpcb *)); 386 387 int route6_input __P((struct mbuf **, int *, int)); 388 389 void frag6_init __P((void)); 390 int frag6_input __P((struct mbuf **, int *, int)); 391 void frag6_slowtimo __P((void)); 392 void frag6_drain __P((void)); 393 394 void rip6_init __P((void)); 395 int rip6_input __P((struct mbuf **, int *, int)); 396 void rip6_ctlinput __P((int, struct sockaddr *, void *)); 397 int rip6_ctloutput __P((struct socket *, struct sockopt *)); 398 int rip6_output __P((struct mbuf *, ...)); 399 int rip6_usrreq __P((struct socket *, 400 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *)); 401 402 int dest6_input __P((struct mbuf **, int *, int)); 403 int none_input __P((struct mbuf **, int *, int)); 404 405 int in6_selectsrc(struct sockaddr_in6 *, struct ip6_pktopts *, 406 struct inpcb *inp, struct route_in6 *, struct ucred *cred, 407 struct ifnet **, struct in6_addr *); 408 int in6_selectroute __P((struct sockaddr_in6 *, struct ip6_pktopts *, 409 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 410 struct rtentry **)); 411 u_int32_t ip6_randomid __P((void)); 412 u_int32_t ip6_randomflowlabel __P((void)); 413 #endif /* _KERNEL */ 414 415 #endif /* !_NETINET6_IP6_VAR_H_ */ 416