1 /* $FreeBSD: src/sys/netinet6/ip6_var.h,v 1.2.2.4 2003/01/23 21:06:47 sam Exp $ */ 2 /* $DragonFly: src/sys/netinet6/ip6_var.h,v 1.13 2008/09/04 09:08:22 hasso Exp $ */ 3 /* $KAME: ip6_var.h,v 1.62 2001/05/03 14:51:48 itojun Exp $ */ 4 5 /* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 /* 35 * Copyright (c) 1982, 1986, 1993 36 * The Regents of the University of California. All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. All advertising materials mentioning features or use of this software 47 * must display the following acknowledgement: 48 * This product includes software developed by the University of 49 * California, Berkeley and its contributors. 50 * 4. Neither the name of the University nor the names of its contributors 51 * may be used to endorse or promote products derived from this software 52 * without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 * 66 * @(#)ip_var.h 8.1 (Berkeley) 6/10/93 67 */ 68 69 #ifndef _NETINET6_IP6_VAR_H_ 70 #define _NETINET6_IP6_VAR_H_ 71 72 #ifndef _SYS_TYPES_H_ 73 #include <sys/types.h> 74 #endif 75 #ifndef _SYS_QUEUE_H_ 76 #include <sys/queue.h> 77 #endif 78 #ifndef _NETINET_IN_H_ 79 #include <netinet/in.h> 80 #endif 81 82 /* 83 * IP6 reassembly queue structure. Each fragment 84 * being reassembled is attached to one of these structures. 85 */ 86 struct ip6q { 87 u_int32_t ip6q_head; 88 u_int16_t ip6q_len; 89 u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */ 90 u_int8_t ip6q_hlim; 91 struct ip6asfrag *ip6q_down; 92 struct ip6asfrag *ip6q_up; 93 u_int32_t ip6q_ident; 94 u_int8_t ip6q_arrive; 95 u_int8_t ip6q_ttl; 96 struct in6_addr ip6q_src, ip6q_dst; 97 struct ip6q *ip6q_next; 98 struct ip6q *ip6q_prev; 99 int ip6q_unfrglen; /* len of unfragmentable part */ 100 #ifdef notyet 101 u_char *ip6q_nxtp; 102 #endif 103 int ip6q_nfrag; /* # of fragments */ 104 }; 105 106 struct ip6asfrag { 107 u_int32_t ip6af_head; 108 u_int16_t ip6af_len; 109 u_int8_t ip6af_nxt; 110 u_int8_t ip6af_hlim; 111 /* must not override the above members during reassembling */ 112 struct ip6asfrag *ip6af_down; 113 struct ip6asfrag *ip6af_up; 114 struct mbuf *ip6af_m; 115 int ip6af_offset; /* offset in ip6af_m to next header */ 116 int ip6af_frglen; /* fragmentable part length */ 117 int ip6af_off; /* fragment offset */ 118 u_int16_t ip6af_mff; /* more fragment bit in frag off */ 119 }; 120 121 #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m)) 122 123 struct ip6_moptions { 124 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */ 125 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 126 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 127 LIST_HEAD(, in6_multi_mship) im6o_memberships; 128 }; 129 130 /* 131 * Control options for outgoing packets 132 */ 133 134 /* Routing header related info */ 135 struct ip6po_rhinfo { 136 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 137 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */ 138 }; 139 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 140 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route 141 142 /* Nexthop related info */ 143 struct ip6po_nhinfo { 144 struct sockaddr *ip6po_nhi_nexthop; 145 struct route_in6 ip6po_nhi_route; /* Route to the nexthop */ 146 }; 147 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop 148 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route 149 150 struct ip6_pktopts { 151 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */ 152 int ip6po_hlim; /* Hoplimit for outgoing packets */ 153 154 /* Outgoing IF/address information */ 155 struct in6_pktinfo *ip6po_pktinfo; 156 157 /* Next-hop address information */ 158 struct ip6po_nhinfo ip6po_nhinfo; 159 160 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 161 162 /* Destination options header (before a routing header) */ 163 struct ip6_dest *ip6po_dest1; 164 165 /* Routing header related info. */ 166 struct ip6po_rhinfo ip6po_rhinfo; 167 168 /* Destination options header (after a routing header) */ 169 struct ip6_dest *ip6po_dest2; 170 /* 171 * below fields are introduced in RFC3542 172 */ 173 int ip6po_tclass; /* traffic class */ 174 int ip6po_minmtu; /* fragment vs PMTU discovery policy */ 175 #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/ 176 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ 177 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ 178 int ip6po_prefer_tempaddr; /* whether temporary addresses are 179 preferred as source address */ 180 #define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */ 181 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */ 182 #define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */ 183 184 int ip6po_flags; 185 #if 0 /* Parameters in this block are obsolete. Do not reuse the values. */ 186 #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */ 187 #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 188 #endif 189 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ 190 #define IP6PO_USECOA 0x08 /* use care of address */ 191 }; 192 193 /* 194 * Control options for incoming packets 195 */ 196 struct ip6stat { 197 u_quad_t ip6s_total; /* total packets received */ 198 u_quad_t ip6s_tooshort; /* packet too short */ 199 u_quad_t ip6s_toosmall; /* not enough data */ 200 u_quad_t ip6s_fragments; /* fragments received */ 201 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 202 u_quad_t ip6s_fragtimeout; /* fragments timed out */ 203 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */ 204 u_quad_t ip6s_forward; /* packets forwarded */ 205 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 206 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */ 207 u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/ 208 u_quad_t ip6s_localout; /* total ip packets generated here */ 209 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */ 210 u_quad_t ip6s_reassembled; /* total packets reassembled ok */ 211 u_quad_t ip6s_fragmented; /* datagrams successfully fragmented */ 212 u_quad_t ip6s_ofragments; /* output fragments created */ 213 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 214 u_quad_t ip6s_badoptions; /* error in option processing */ 215 u_quad_t ip6s_noroute; /* packets discarded due to no route */ 216 u_quad_t ip6s_badvers; /* ip6 version != 6 */ 217 u_quad_t ip6s_rawout; /* total raw ip packets generated */ 218 u_quad_t ip6s_badscope; /* scope error */ 219 u_quad_t ip6s_notmember; /* don't join this multicast group */ 220 u_quad_t ip6s_nxthist[256]; /* next header history */ 221 u_quad_t ip6s_m1; /* one mbuf */ 222 u_quad_t ip6s_m2m[32]; /* two or more mbuf */ 223 u_quad_t ip6s_mext1; /* one ext mbuf */ 224 u_quad_t ip6s_mext2m; /* two or more ext mbuf */ 225 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */ 226 u_quad_t ip6s_nogif; /* no match gif found */ 227 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */ 228 229 /* 230 * statistics for improvement of the source address selection 231 * algorithm: 232 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 233 */ 234 /* number of times that address selection fails */ 235 u_quad_t ip6s_sources_none; 236 /* number of times that an address on the outgoing I/F is chosen */ 237 u_quad_t ip6s_sources_sameif[16]; 238 /* number of times that an address on a non-outgoing I/F is chosen */ 239 u_quad_t ip6s_sources_otherif[16]; 240 /* 241 * number of times that an address that has the same scope 242 * from the destination is chosen. 243 */ 244 u_quad_t ip6s_sources_samescope[16]; 245 /* 246 * number of times that an address that has a different scope 247 * from the destination is chosen. 248 */ 249 u_quad_t ip6s_sources_otherscope[16]; 250 /* number of times that an deprecated address is chosen */ 251 u_quad_t ip6s_sources_deprecated[16]; 252 253 u_quad_t ip6s_forward_cachehit; 254 u_quad_t ip6s_forward_cachemiss; 255 }; 256 257 #ifdef _KERNEL 258 /* 259 * IPv6 onion peeling state. 260 * it will be initialized when we come into ip6_input(). 261 * XXX do not make it a kitchen sink! 262 */ 263 struct ip6aux { 264 u_int32_t ip6a_flags; 265 #define IP6A_SWAP 0x01 /* swapped home/care-of on packet */ 266 #define IP6A_HASEEN 0x02 /* HA was present */ 267 #define IP6A_BRUID 0x04 /* BR Unique Identifier was present */ 268 #define IP6A_RTALERTSEEN 0x08 /* rtalert present */ 269 270 /* ip6.ip6_src */ 271 struct in6_addr ip6a_careof; /* care-of address of the peer */ 272 struct in6_addr ip6a_home; /* home address of the peer */ 273 u_int16_t ip6a_bruid; /* BR unique identifier */ 274 275 /* ip6.ip6_dst */ 276 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */ 277 278 /* rtalert */ 279 u_int16_t ip6a_rtalert; /* rtalert option value */ 280 281 /* 282 * decapsulation history will be here. 283 * with IPsec it may not be accurate. 284 */ 285 }; 286 #endif 287 288 #ifdef _KERNEL 289 /* flags passed to ip6_output as last parameter */ 290 #define IPV6_DADOUTPUT 0x01 /* DAD */ 291 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 292 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 293 294 /* direction passed to ip_hashfn as last parameter */ 295 #define IP6_MPORT_IN 0 /* Find lwkt port for incoming packets */ 296 #define IP6_MPORT_OUT 1 /* Find lwkt port for outgoing packets */ 297 298 extern struct ip6stat ip6stat; /* statistics */ 299 extern u_int32_t ip6_id; /* fragment identifier */ 300 extern int ip6_minhlim; /* minimum hop limit */ 301 extern int ip6_defhlim; /* default hop limit */ 302 extern int ip6_defmcasthlim; /* default multicast hop limit */ 303 extern int ip6_forwarding; /* act as router? */ 304 extern int ip6_forward_srcrt; /* forward src-routed? */ 305 extern int ip6_gif_hlim; /* Hop limit for gif encap packet */ 306 extern int ip6_use_deprecated; /* allow deprecated addr as source */ 307 extern int ip6_rr_prune; /* router renumbering prefix 308 * walk list every 5 sec. */ 309 310 extern struct socket *ip6_mrouter; /* multicast routing daemon */ 311 extern int ip6_sendredirects; /* send IP redirects when forwarding? */ 312 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */ 313 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */ 314 extern int ip6_sourcecheck; /* Verify source interface */ 315 extern int ip6_sourcecheck_interval; /* Interval between log messages */ 316 extern int ip6_accept_rtadv; /* Acts as a host not a router */ 317 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */ 318 extern int ip6_log_interval; 319 extern time_t ip6_log_time; 320 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */ 321 extern int ip6_dad_count; /* DupAddrDetectionTransmits */ 322 323 extern u_int32_t ip6_flow_seq; 324 extern int ip6_auto_flowlabel; 325 extern int ip6_auto_linklocal; 326 327 extern int ip6_anonportmin; /* minimum ephemeral port */ 328 extern int ip6_anonportmax; /* maximum ephemeral port */ 329 extern int ip6_lowportmin; /* minimum reserved port */ 330 extern int ip6_lowportmax; /* maximum reserved port */ 331 332 extern int ip6_use_tempaddr; /* whether to use temporary addresses. */ 333 334 extern struct pfil_head inet6_pfil_hook; 335 336 extern struct pr_usrreqs rip6_usrreqs; 337 338 struct proc; 339 struct inpcb; 340 struct sockopt; 341 struct in6_ifaddr; 342 struct ip6_hdr; 343 union netmsg; 344 345 void icmp6_ctloutput (union netmsg *); 346 347 void ip6_init (void); 348 void ip6intr (void); 349 struct in6_ifaddr *ip6_getdstifaddr (struct mbuf *); 350 void ip6_freepcbopts (struct ip6_pktopts *); 351 void ip6_freemoptions (struct ip6_moptions *); 352 int ip6_unknown_opt (u_int8_t *, struct mbuf *, int); 353 char * ip6_get_prevhdr (struct mbuf *, int); 354 int ip6_nexthdr (struct mbuf *, int, int, int *); 355 int ip6_lasthdr (struct mbuf *, int, int, int *); 356 357 struct ip6aux *ip6_addaux (struct mbuf *); 358 struct ip6aux *ip6_findaux (struct mbuf *); 359 void ip6_delaux (struct mbuf *); 360 361 int ip6_mforward (struct ip6_hdr *, struct ifnet *, struct mbuf *); 362 int ip6_process_hopopts (struct mbuf *, u_int8_t *, int, u_int32_t *, 363 u_int32_t *); 364 void ip6_savecontrol (struct inpcb *, struct mbuf **, struct ip6_hdr *, 365 struct mbuf *); 366 void ip6_notify_pmtu (struct inpcb *, struct sockaddr_in6 *, 367 u_int32_t *); 368 int ip6_sysctl (int *, u_int, void *, size_t *, void *, size_t); 369 370 void ip6_forward (struct mbuf *, int); 371 372 void ip6_mloopback (struct ifnet *, struct mbuf *, struct sockaddr_in6 *); 373 int ip6_output (struct mbuf *, struct ip6_pktopts *, 374 struct route_in6 *, 375 int, 376 struct ip6_moptions *, struct ifnet **, 377 struct inpcb *); 378 void ip6_ctloutput_dispatch(netmsg_t msg); 379 int ip6_ctloutput (struct socket *, struct sockopt *); 380 int ip6_raw_ctloutput (struct socket *, struct sockopt *); 381 void init_ip6pktopts (struct ip6_pktopts *); 382 int 383 ip6_setpktoptions(struct mbuf *, struct ip6_pktopts *, 384 struct ip6_pktopts *, int , int); 385 void ip6_clearpktopts (struct ip6_pktopts *, int); 386 struct ip6_pktopts *ip6_copypktopts (struct ip6_pktopts *, int); 387 int ip6_optlen (struct inpcb *); 388 389 int route6_input (struct mbuf **, int *, int); 390 391 void frag6_init (void); 392 int frag6_input (struct mbuf **, int *, int); 393 void frag6_slowtimo (void); 394 void frag6_drain (void); 395 396 void rip6_init (void); 397 int rip6_input (struct mbuf **, int *, int); 398 void rip6_ctlinput (union netmsg *); 399 void rip6_ctloutput (union netmsg *); 400 int rip6_output (struct mbuf *, struct socket *, ...); 401 int rip6_usrreq (struct socket *, 402 int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *); 403 404 int dest6_input (struct mbuf **, int *, int); 405 int none_input (struct mbuf **, int *, int); 406 #endif /* _KERNEL */ 407 408 #endif /* !_NETINET6_IP6_VAR_H_ */ 409