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