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 struct ip6_moptions { 102 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */ 103 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 104 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 105 LIST_HEAD(, in6_multi_mship) im6o_memberships; 106 }; 107 108 /* 109 * Control options for outgoing packets 110 */ 111 112 /* Routing header related info */ 113 struct ip6po_rhinfo { 114 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 115 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */ 116 }; 117 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 118 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route 119 120 /* Nexthop related info */ 121 struct ip6po_nhinfo { 122 struct sockaddr *ip6po_nhi_nexthop; 123 struct route_in6 ip6po_nhi_route; /* Route to the nexthop */ 124 }; 125 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop 126 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route 127 128 struct ip6_pktopts { 129 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */ 130 int ip6po_hlim; /* Hoplimit for outgoing packets */ 131 132 /* Outgoing IF/address information */ 133 struct in6_pktinfo *ip6po_pktinfo; 134 135 /* Next-hop address information */ 136 struct ip6po_nhinfo ip6po_nhinfo; 137 138 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 139 140 /* Destination options header (before a routing header) */ 141 struct ip6_dest *ip6po_dest1; 142 143 /* Routing header related info. */ 144 struct ip6po_rhinfo ip6po_rhinfo; 145 146 /* Destination options header (after a routing header) */ 147 struct ip6_dest *ip6po_dest2; 148 149 int ip6po_tclass; /* traffic class */ 150 151 int ip6po_minmtu; /* fragment vs PMTU discovery policy */ 152 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/ 153 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ 154 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ 155 156 int ip6po_prefer_tempaddr; /* whether temporary addresses are 157 preferred as source address */ 158 #define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */ 159 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */ 160 #define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */ 161 162 int ip6po_flags; 163 #if 0 /* parameters in this block is obsolete. do not reuse the values. */ 164 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */ 165 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 166 #endif 167 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ 168 #define IP6PO_USECOA 0x08 /* use care of address */ 169 }; 170 171 /* 172 * Control options for incoming packets 173 */ 174 175 struct ip6stat { 176 u_quad_t ip6s_total; /* total packets received */ 177 u_quad_t ip6s_tooshort; /* packet too short */ 178 u_quad_t ip6s_toosmall; /* not enough data */ 179 u_quad_t ip6s_fragments; /* fragments received */ 180 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 181 u_quad_t ip6s_fragtimeout; /* fragments timed out */ 182 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */ 183 u_quad_t ip6s_forward; /* packets forwarded */ 184 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 185 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */ 186 u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/ 187 u_quad_t ip6s_localout; /* total ip packets generated here */ 188 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */ 189 u_quad_t ip6s_reassembled; /* total packets reassembled ok */ 190 u_quad_t ip6s_fragmented; /* datagrams successfully fragmented */ 191 u_quad_t ip6s_ofragments; /* output fragments created */ 192 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 193 u_quad_t ip6s_badoptions; /* error in option processing */ 194 u_quad_t ip6s_noroute; /* packets discarded due to no route */ 195 u_quad_t ip6s_badvers; /* ip6 version != 6 */ 196 u_quad_t ip6s_rawout; /* total raw ip packets generated */ 197 u_quad_t ip6s_badscope; /* scope error */ 198 u_quad_t ip6s_notmember; /* don't join this multicast group */ 199 u_quad_t ip6s_nxthist[256]; /* next header history */ 200 u_quad_t ip6s_m1; /* one mbuf */ 201 u_quad_t ip6s_m2m[32]; /* two or more mbuf */ 202 u_quad_t ip6s_mext1; /* one ext mbuf */ 203 u_quad_t ip6s_mext2m; /* two or more ext mbuf */ 204 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */ 205 u_quad_t ip6s_nogif; /* no match gif found */ 206 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */ 207 208 /* 209 * statistics for improvement of the source address selection 210 * algorithm: 211 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 212 */ 213 /* number of times that address selection fails */ 214 u_quad_t ip6s_sources_none; 215 /* number of times that an address on the outgoing I/F is chosen */ 216 u_quad_t ip6s_sources_sameif[16]; 217 /* number of times that an address on a non-outgoing I/F is chosen */ 218 u_quad_t ip6s_sources_otherif[16]; 219 /* 220 * number of times that an address that has the same scope 221 * from the destination is chosen. 222 */ 223 u_quad_t ip6s_sources_samescope[16]; 224 /* 225 * number of times that an address that has a different scope 226 * from the destination is chosen. 227 */ 228 u_quad_t ip6s_sources_otherscope[16]; 229 /* number of times that a deprecated address is chosen */ 230 u_quad_t ip6s_sources_deprecated[16]; 231 232 /* number of times that each rule of source selection is applied. */ 233 u_quad_t ip6s_sources_rule[16]; 234 }; 235 236 #ifdef _KERNEL 237 /* 238 * IPv6 onion peeling state. 239 * it will be initialized when we come into ip6_input(). 240 * XXX do not make it a kitchen sink! 241 */ 242 struct ip6aux { 243 u_int32_t ip6a_flags; 244 #define IP6A_SWAP 0x01 /* swapped home/care-of on packet */ 245 #define IP6A_HASEEN 0x02 /* HA was present */ 246 #define IP6A_BRUID 0x04 /* BR Unique Identifier was present */ 247 #define IP6A_RTALERTSEEN 0x08 /* rtalert present */ 248 249 /* ip6.ip6_src */ 250 struct in6_addr ip6a_careof; /* care-of address of the peer */ 251 struct in6_addr ip6a_home; /* home address of the peer */ 252 u_int16_t ip6a_bruid; /* BR unique identifier */ 253 254 /* ip6.ip6_dst */ 255 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */ 256 257 /* rtalert */ 258 u_int16_t ip6a_rtalert; /* rtalert option value */ 259 260 /* 261 * decapsulation history will be here. 262 * with IPsec it may not be accurate. 263 */ 264 }; 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 278 279 #ifdef VIMAGE_GLOBALS 280 extern struct ip6stat ip6stat; /* statistics */ 281 extern int ip6_defhlim; /* default hop limit */ 282 extern int ip6_defmcasthlim; /* default multicast hop limit */ 283 extern int ip6_forwarding; /* act as router? */ 284 extern int ip6_gif_hlim; /* Hop limit for gif encap packet */ 285 extern int ip6_use_deprecated; /* allow deprecated addr as source */ 286 extern int ip6_rr_prune; /* router renumbering prefix 287 * walk list every 5 sec. */ 288 extern int ip6_mcast_pmtu; /* enable pMTU discovery for multicast? */ 289 extern int ip6_v6only; 290 #endif /* VIMAGE_GLOBALS */ 291 292 extern struct socket *ip6_mrouter; /* multicast routing daemon */ 293 #ifdef VIMAGE_GLOBALS 294 extern int ip6_sendredirects; /* send IP redirects when forwarding? */ 295 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */ 296 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */ 297 extern int ip6_accept_rtadv; /* Acts as a host not a router */ 298 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */ 299 extern int ip6_log_interval; 300 extern time_t ip6_log_time; 301 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */ 302 extern int ip6_dad_count; /* DupAddrDetectionTransmits */ 303 304 extern int ip6_auto_flowlabel; 305 extern int ip6_auto_linklocal; 306 307 extern int ip6_use_tempaddr; /* whether to use temporary addresses. */ 308 extern int ip6_prefer_tempaddr; /* whether to prefer temporary addresses 309 in the source address selection */ 310 311 #ifdef IPSTEALTH 312 extern int ip6stealth; 313 #endif 314 315 extern int ip6_use_defzone; /* whether to use the default scope zone 316 when unspecified */ 317 #endif /* VIMAGE_GLOBALS */ 318 319 extern struct pfil_head inet6_pfil_hook; /* packet filter hooks */ 320 321 extern struct pr_usrreqs rip6_usrreqs; 322 struct sockopt; 323 324 struct inpcb; 325 326 int icmp6_ctloutput __P((struct socket *, struct sockopt *sopt)); 327 328 struct in6_ifaddr; 329 void ip6_init __P((void)); 330 void ip6_input __P((struct mbuf *)); 331 struct in6_ifaddr *ip6_getdstifaddr __P((struct mbuf *)); 332 void ip6_freepcbopts __P((struct ip6_pktopts *)); 333 void ip6_freemoptions __P((struct ip6_moptions *)); 334 int ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int)); 335 char * ip6_get_prevhdr __P((struct mbuf *, int)); 336 int ip6_nexthdr __P((struct mbuf *, int, int, int *)); 337 int ip6_lasthdr __P((struct mbuf *, int, int, int *)); 338 339 struct ip6aux *ip6_addaux __P((struct mbuf *)); 340 struct ip6aux *ip6_findaux __P((struct mbuf *)); 341 void ip6_delaux __P((struct mbuf *)); 342 343 extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, 344 struct mbuf *); 345 346 int ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *, 347 u_int32_t *)); 348 struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *, 349 struct mbuf **, int *); 350 void ip6_savecontrol __P((struct inpcb *, struct mbuf *, struct mbuf **)); 351 void ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *, 352 u_int32_t *)); 353 int ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t)); 354 355 void ip6_forward __P((struct mbuf *, int)); 356 357 void ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *)); 358 int ip6_output __P((struct mbuf *, struct ip6_pktopts *, 359 struct route_in6 *, 360 int, 361 struct ip6_moptions *, struct ifnet **, 362 struct inpcb *)); 363 int ip6_ctloutput __P((struct socket *, struct sockopt *)); 364 int ip6_raw_ctloutput __P((struct socket *, struct sockopt *)); 365 void ip6_initpktopts __P((struct ip6_pktopts *)); 366 int ip6_setpktopts __P((struct mbuf *, struct ip6_pktopts *, 367 struct ip6_pktopts *, struct ucred *, int)); 368 void ip6_clearpktopts __P((struct ip6_pktopts *, int)); 369 struct ip6_pktopts *ip6_copypktopts __P((struct ip6_pktopts *, int)); 370 int ip6_optlen __P((struct inpcb *)); 371 372 int route6_input __P((struct mbuf **, int *, int)); 373 374 void frag6_init __P((void)); 375 int frag6_input __P((struct mbuf **, int *, int)); 376 void frag6_slowtimo __P((void)); 377 void frag6_drain __P((void)); 378 379 void rip6_init __P((void)); 380 int rip6_input __P((struct mbuf **, int *, int)); 381 void rip6_ctlinput __P((int, struct sockaddr *, void *)); 382 int rip6_ctloutput __P((struct socket *, struct sockopt *)); 383 int rip6_output __P((struct mbuf *, ...)); 384 int rip6_usrreq __P((struct socket *, 385 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *)); 386 387 int dest6_input __P((struct mbuf **, int *, int)); 388 int none_input __P((struct mbuf **, int *, int)); 389 390 struct in6_addr *in6_selectsrc __P((struct sockaddr_in6 *, struct ip6_pktopts *, 391 struct inpcb *inp, struct route_in6 *, struct ucred *cred, 392 struct ifnet **, int *)); 393 int in6_selectroute __P((struct sockaddr_in6 *, struct ip6_pktopts *, 394 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 395 struct rtentry **)); 396 u_int32_t ip6_randomid __P((void)); 397 u_int32_t ip6_randomflowlabel __P((void)); 398 #endif /* _KERNEL */ 399 400 #endif /* !_NETINET6_IP6_VAR_H_ */ 401