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 1.5 2004/03/06 01:58:56 hsu 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 /* 73 * IP6 reassembly queue structure. Each fragment 74 * being reassembled is attached to one of these structures. 75 */ 76 struct ip6q { 77 u_int32_t ip6q_head; 78 u_int16_t ip6q_len; 79 u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */ 80 u_int8_t ip6q_hlim; 81 struct ip6asfrag *ip6q_down; 82 struct ip6asfrag *ip6q_up; 83 u_int32_t ip6q_ident; 84 u_int8_t ip6q_arrive; 85 u_int8_t ip6q_ttl; 86 struct in6_addr ip6q_src, ip6q_dst; 87 struct ip6q *ip6q_next; 88 struct ip6q *ip6q_prev; 89 int ip6q_unfrglen; /* len of unfragmentable part */ 90 #ifdef notyet 91 u_char *ip6q_nxtp; 92 #endif 93 }; 94 95 struct ip6asfrag { 96 u_int32_t ip6af_head; 97 u_int16_t ip6af_len; 98 u_int8_t ip6af_nxt; 99 u_int8_t ip6af_hlim; 100 /* must not override the above members during reassembling */ 101 struct ip6asfrag *ip6af_down; 102 struct ip6asfrag *ip6af_up; 103 struct mbuf *ip6af_m; 104 int ip6af_offset; /* offset in ip6af_m to next header */ 105 int ip6af_frglen; /* fragmentable part length */ 106 int ip6af_off; /* fragment offset */ 107 u_int16_t ip6af_mff; /* more fragment bit in frag off */ 108 }; 109 110 #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m)) 111 112 struct ip6_moptions { 113 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */ 114 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 115 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 116 LIST_HEAD(, in6_multi_mship) im6o_memberships; 117 }; 118 119 /* 120 * Control options for outgoing packets 121 */ 122 123 /* Routing header related info */ 124 struct ip6po_rhinfo { 125 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 126 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */ 127 }; 128 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 129 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route 130 131 struct ip6_pktopts { 132 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */ 133 int ip6po_hlim; /* Hoplimit for outgoing packets */ 134 135 /* Outgoing IF/address information */ 136 struct in6_pktinfo *ip6po_pktinfo; 137 138 struct sockaddr *ip6po_nexthop; /* Next-hop address */ 139 140 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 141 142 /* Destination options header (before a routing header) */ 143 struct ip6_dest *ip6po_dest1; 144 145 /* Routing header related info. */ 146 struct ip6po_rhinfo ip6po_rhinfo; 147 148 /* Destination options header (after a routing header) */ 149 struct ip6_dest *ip6po_dest2; 150 }; 151 152 /* 153 * Control options for incoming packets 154 */ 155 156 struct ip6stat { 157 u_quad_t ip6s_total; /* total packets received */ 158 u_quad_t ip6s_tooshort; /* packet too short */ 159 u_quad_t ip6s_toosmall; /* not enough data */ 160 u_quad_t ip6s_fragments; /* fragments received */ 161 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 162 u_quad_t ip6s_fragtimeout; /* fragments timed out */ 163 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */ 164 u_quad_t ip6s_forward; /* packets forwarded */ 165 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 166 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */ 167 u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/ 168 u_quad_t ip6s_localout; /* total ip packets generated here */ 169 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */ 170 u_quad_t ip6s_reassembled; /* total packets reassembled ok */ 171 u_quad_t ip6s_fragmented; /* datagrams sucessfully fragmented */ 172 u_quad_t ip6s_ofragments; /* output fragments created */ 173 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 174 u_quad_t ip6s_badoptions; /* error in option processing */ 175 u_quad_t ip6s_noroute; /* packets discarded due to no route */ 176 u_quad_t ip6s_badvers; /* ip6 version != 6 */ 177 u_quad_t ip6s_rawout; /* total raw ip packets generated */ 178 u_quad_t ip6s_badscope; /* scope error */ 179 u_quad_t ip6s_notmember; /* don't join this multicast group */ 180 u_quad_t ip6s_nxthist[256]; /* next header history */ 181 u_quad_t ip6s_m1; /* one mbuf */ 182 u_quad_t ip6s_m2m[32]; /* two or more mbuf */ 183 u_quad_t ip6s_mext1; /* one ext mbuf */ 184 u_quad_t ip6s_mext2m; /* two or more ext mbuf */ 185 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */ 186 u_quad_t ip6s_nogif; /* no match gif found */ 187 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */ 188 189 /* 190 * statistics for improvement of the source address selection 191 * algorithm: 192 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 193 */ 194 /* number of times that address selection fails */ 195 u_quad_t ip6s_sources_none; 196 /* number of times that an address on the outgoing I/F is chosen */ 197 u_quad_t ip6s_sources_sameif[16]; 198 /* number of times that an address on a non-outgoing I/F is chosen */ 199 u_quad_t ip6s_sources_otherif[16]; 200 /* 201 * number of times that an address that has the same scope 202 * from the destination is chosen. 203 */ 204 u_quad_t ip6s_sources_samescope[16]; 205 /* 206 * number of times that an address that has a different scope 207 * from the destination is chosen. 208 */ 209 u_quad_t ip6s_sources_otherscope[16]; 210 /* number of times that an deprecated address is chosen */ 211 u_quad_t ip6s_sources_deprecated[16]; 212 213 u_quad_t ip6s_forward_cachehit; 214 u_quad_t ip6s_forward_cachemiss; 215 }; 216 217 #ifdef _KERNEL 218 /* 219 * IPv6 onion peeling state. 220 * it will be initialized when we come into ip6_input(). 221 * XXX do not make it a kitchen sink! 222 */ 223 struct ip6aux { 224 u_int32_t ip6a_flags; 225 #define IP6A_SWAP 0x01 /* swapped home/care-of on packet */ 226 #define IP6A_HASEEN 0x02 /* HA was present */ 227 #define IP6A_BRUID 0x04 /* BR Unique Identifier was present */ 228 #define IP6A_RTALERTSEEN 0x08 /* rtalert present */ 229 230 /* ip6.ip6_src */ 231 struct in6_addr ip6a_careof; /* care-of address of the peer */ 232 struct in6_addr ip6a_home; /* home address of the peer */ 233 u_int16_t ip6a_bruid; /* BR unique identifier */ 234 235 /* ip6.ip6_dst */ 236 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */ 237 238 /* rtalert */ 239 u_int16_t ip6a_rtalert; /* rtalert option value */ 240 241 /* 242 * decapsulation history will be here. 243 * with IPsec it may not be accurate. 244 */ 245 }; 246 #endif 247 248 #ifdef _KERNEL 249 /* flags passed to ip6_output as last parameter */ 250 #define IPV6_DADOUTPUT 0x01 /* DAD */ 251 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 252 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 253 254 extern struct ip6stat ip6stat; /* statistics */ 255 extern u_int32_t ip6_id; /* fragment identifier */ 256 extern int ip6_defhlim; /* default hop limit */ 257 extern int ip6_defmcasthlim; /* default multicast hop limit */ 258 extern int ip6_forwarding; /* act as router? */ 259 extern int ip6_forward_srcrt; /* forward src-routed? */ 260 extern int ip6_gif_hlim; /* Hop limit for gif encap packet */ 261 extern int ip6_use_deprecated; /* allow deprecated addr as source */ 262 extern int ip6_rr_prune; /* router renumbering prefix 263 * walk list every 5 sec. */ 264 extern int ip6_v6only; 265 266 extern struct socket *ip6_mrouter; /* multicast routing daemon */ 267 extern int ip6_sendredirects; /* send IP redirects when forwarding? */ 268 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */ 269 extern int ip6_sourcecheck; /* Verify source interface */ 270 extern int ip6_sourcecheck_interval; /* Interval between log messages */ 271 extern int ip6_accept_rtadv; /* Acts as a host not a router */ 272 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */ 273 extern int ip6_log_interval; 274 extern time_t ip6_log_time; 275 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */ 276 extern int ip6_dad_count; /* DupAddrDetectionTransmits */ 277 278 extern u_int32_t ip6_flow_seq; 279 extern int ip6_auto_flowlabel; 280 extern int ip6_auto_linklocal; 281 282 extern int ip6_anonportmin; /* minimum ephemeral port */ 283 extern int ip6_anonportmax; /* maximum ephemeral port */ 284 extern int ip6_lowportmin; /* minimum reserved port */ 285 extern int ip6_lowportmax; /* maximum reserved port */ 286 287 extern int ip6_use_tempaddr; /* whether to use temporary addresses. */ 288 289 #ifdef PFIL_HOOKS 290 extern struct pfil_head inet6_pfil_hook; 291 #endif 292 293 extern struct pr_usrreqs rip6_usrreqs; 294 struct sockopt; 295 296 struct inpcb; 297 298 int icmp6_ctloutput (struct socket *, struct sockopt *sopt); 299 300 struct in6_ifaddr; 301 void ip6_init (void); 302 void ip6intr (void); 303 struct netmsg; 304 void ip6_input (struct netmsg *); 305 struct in6_ifaddr *ip6_getdstifaddr (struct mbuf *); 306 void ip6_freepcbopts (struct ip6_pktopts *); 307 void ip6_freemoptions (struct ip6_moptions *); 308 int ip6_unknown_opt (u_int8_t *, struct mbuf *, int); 309 char * ip6_get_prevhdr (struct mbuf *, int); 310 int ip6_nexthdr (struct mbuf *, int, int, int *); 311 int ip6_lasthdr (struct mbuf *, int, int, int *); 312 313 struct ip6aux *ip6_addaux (struct mbuf *); 314 struct ip6aux *ip6_findaux (struct mbuf *); 315 void ip6_delaux (struct mbuf *); 316 317 int ip6_mforward (struct ip6_hdr *, struct ifnet *, struct mbuf *); 318 int ip6_process_hopopts (struct mbuf *, u_int8_t *, int, u_int32_t *, 319 u_int32_t *); 320 void ip6_savecontrol (struct inpcb *, struct mbuf **, struct ip6_hdr *, 321 struct mbuf *); 322 void ip6_notify_pmtu (struct inpcb *, struct sockaddr_in6 *, 323 u_int32_t *); 324 int ip6_sysctl (int *, u_int, void *, size_t *, void *, size_t); 325 326 void ip6_forward (struct mbuf *, int); 327 328 void ip6_mloopback (struct ifnet *, struct mbuf *, struct sockaddr_in6 *); 329 int ip6_output (struct mbuf *, struct ip6_pktopts *, 330 struct route_in6 *, 331 int, 332 struct ip6_moptions *, struct ifnet **, 333 struct inpcb *); 334 int ip6_ctloutput (struct socket *, struct sockopt *sopt); 335 void init_ip6pktopts (struct ip6_pktopts *); 336 int ip6_setpktoptions (struct mbuf *, struct ip6_pktopts *, int, int); 337 void ip6_clearpktopts (struct ip6_pktopts *, int, int); 338 struct ip6_pktopts *ip6_copypktopts (struct ip6_pktopts *, int); 339 int ip6_optlen (struct inpcb *); 340 341 int route6_input (struct mbuf **, int *, int); 342 343 void frag6_init (void); 344 int frag6_input (struct mbuf **, int *, int); 345 void frag6_slowtimo (void); 346 void frag6_drain (void); 347 348 void rip6_init (void); 349 int rip6_input (struct mbuf **mp, int *offp, int proto); 350 void rip6_ctlinput (int, struct sockaddr *, void *); 351 int rip6_ctloutput (struct socket *so, struct sockopt *sopt); 352 int rip6_output (struct mbuf *, ...); 353 int rip6_usrreq (struct socket *, 354 int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *); 355 356 int dest6_input (struct mbuf **, int *, int); 357 int none_input (struct mbuf **, int *, int); 358 #endif /* _KERNEL */ 359 360 #endif /* !_NETINET6_IP6_VAR_H_ */ 361