ip6_var.h revision 120639
1/* $FreeBSD: head/sys/netinet6/ip6_var.h 120639 2003-10-01 15:13:29Z ume $ */ 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. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Berkeley and its contributors. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * @(#)ip_var.h 8.1 (Berkeley) 6/10/93 66 */ 67 68#ifndef _NETINET6_IP6_VAR_H_ 69#define _NETINET6_IP6_VAR_H_ 70 71/* 72 * IP6 reassembly queue structure. Each fragment 73 * being reassembled is attached to one of these structures. 74 */ 75struct ip6q { 76 u_int32_t ip6q_head; 77 u_int16_t ip6q_len; 78 u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */ 79 u_int8_t ip6q_hlim; 80 struct ip6asfrag *ip6q_down; 81 struct ip6asfrag *ip6q_up; 82 u_int32_t ip6q_ident; 83 u_int8_t ip6q_arrive; 84 u_int8_t ip6q_ttl; 85 struct in6_addr ip6q_src, ip6q_dst; 86 struct ip6q *ip6q_next; 87 struct ip6q *ip6q_prev; 88 int ip6q_unfrglen; /* len of unfragmentable part */ 89#ifdef notyet 90 u_char *ip6q_nxtp; 91#endif 92}; 93 94struct ip6asfrag { 95 u_int32_t ip6af_head; 96 u_int16_t ip6af_len; 97 u_int8_t ip6af_nxt; 98 u_int8_t ip6af_hlim; 99 /* must not override the above members during reassembling */ 100 struct ip6asfrag *ip6af_down; 101 struct ip6asfrag *ip6af_up; 102 struct mbuf *ip6af_m; 103 int ip6af_offset; /* offset in ip6af_m to next header */ 104 int ip6af_frglen; /* fragmentable part length */ 105 int ip6af_off; /* fragment offset */ 106 u_int16_t ip6af_mff; /* more fragment bit in frag off */ 107}; 108 109#define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m)) 110 111struct ip6_moptions { 112 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */ 113 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 114 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 115 LIST_HEAD(, in6_multi_mship) im6o_memberships; 116}; 117 118/* 119 * Control options for outgoing packets 120 */ 121 122/* Routing header related info */ 123struct ip6po_rhinfo { 124 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 125 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */ 126}; 127#define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 128#define ip6po_route ip6po_rhinfo.ip6po_rhi_route 129 130struct ip6_pktopts { 131 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */ 132 int ip6po_hlim; /* Hoplimit for outgoing packets */ 133 134 /* Outgoing IF/address information */ 135 struct in6_pktinfo *ip6po_pktinfo; 136 137 struct sockaddr *ip6po_nexthop; /* Next-hop address */ 138 139 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 140 141 /* Destination options header (before a routing header) */ 142 struct ip6_dest *ip6po_dest1; 143 144 /* Routing header related info. */ 145 struct ip6po_rhinfo ip6po_rhinfo; 146 147 /* Destination options header (after a routing header) */ 148 struct ip6_dest *ip6po_dest2; 149}; 150 151/* 152 * Control options for incoming packets 153 */ 154 155struct ip6stat { 156 u_quad_t ip6s_total; /* total packets received */ 157 u_quad_t ip6s_tooshort; /* packet too short */ 158 u_quad_t ip6s_toosmall; /* not enough data */ 159 u_quad_t ip6s_fragments; /* fragments received */ 160 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 161 u_quad_t ip6s_fragtimeout; /* fragments timed out */ 162 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */ 163 u_quad_t ip6s_forward; /* packets forwarded */ 164 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 165 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */ 166 u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/ 167 u_quad_t ip6s_localout; /* total ip packets generated here */ 168 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */ 169 u_quad_t ip6s_reassembled; /* total packets reassembled ok */ 170 u_quad_t ip6s_fragmented; /* datagrams sucessfully fragmented */ 171 u_quad_t ip6s_ofragments; /* output fragments created */ 172 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 173 u_quad_t ip6s_badoptions; /* error in option processing */ 174 u_quad_t ip6s_noroute; /* packets discarded due to no route */ 175 u_quad_t ip6s_badvers; /* ip6 version != 6 */ 176 u_quad_t ip6s_rawout; /* total raw ip packets generated */ 177 u_quad_t ip6s_badscope; /* scope error */ 178 u_quad_t ip6s_notmember; /* don't join this multicast group */ 179 u_quad_t ip6s_nxthist[256]; /* next header history */ 180 u_quad_t ip6s_m1; /* one mbuf */ 181 u_quad_t ip6s_m2m[32]; /* two or more mbuf */ 182 u_quad_t ip6s_mext1; /* one ext mbuf */ 183 u_quad_t ip6s_mext2m; /* two or more ext mbuf */ 184 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */ 185 u_quad_t ip6s_nogif; /* no match gif found */ 186 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */ 187 188 /* 189 * statistics for improvement of the source address selection 190 * algorithm: 191 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 192 */ 193 /* number of times that address selection fails */ 194 u_quad_t ip6s_sources_none; 195 /* number of times that an address on the outgoing I/F is chosen */ 196 u_quad_t ip6s_sources_sameif[16]; 197 /* number of times that an address on a non-outgoing I/F is chosen */ 198 u_quad_t ip6s_sources_otherif[16]; 199 /* 200 * number of times that an address that has the same scope 201 * from the destination is chosen. 202 */ 203 u_quad_t ip6s_sources_samescope[16]; 204 /* 205 * number of times that an address that has a different scope 206 * from the destination is chosen. 207 */ 208 u_quad_t ip6s_sources_otherscope[16]; 209 /* number of times that a deprecated address is chosen */ 210 u_quad_t ip6s_sources_deprecated[16]; 211 212 u_quad_t ip6s_forward_cachehit; 213 u_quad_t ip6s_forward_cachemiss; 214}; 215 216#ifdef _KERNEL 217/* 218 * IPv6 onion peeling state. 219 * it will be initialized when we come into ip6_input(). 220 * XXX do not make it a kitchen sink! 221 */ 222struct ip6aux { 223 u_int32_t ip6a_flags; 224#define IP6A_SWAP 0x01 /* swapped home/care-of on packet */ 225#define IP6A_HASEEN 0x02 /* HA was present */ 226#define IP6A_BRUID 0x04 /* BR Unique Identifier was present */ 227#define IP6A_RTALERTSEEN 0x08 /* rtalert present */ 228 229 /* ip6.ip6_src */ 230 struct in6_addr ip6a_careof; /* care-of address of the peer */ 231 struct in6_addr ip6a_home; /* home address of the peer */ 232 u_int16_t ip6a_bruid; /* BR unique identifier */ 233 234 /* ip6.ip6_dst */ 235 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */ 236 237 /* rtalert */ 238 u_int16_t ip6a_rtalert; /* rtalert option value */ 239 240 /* 241 * decapsulation history will be here. 242 * with IPsec it may not be accurate. 243 */ 244}; 245#endif 246 247#ifdef _KERNEL 248/* flags passed to ip6_output as last parameter */ 249#define IPV6_DADOUTPUT 0x01 /* DAD */ 250#define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 251#define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 252 253extern struct ip6stat ip6stat; /* statistics */ 254extern u_int32_t ip6_id; /* fragment identifier */ 255extern int ip6_defhlim; /* default hop limit */ 256extern int ip6_defmcasthlim; /* default multicast hop limit */ 257extern int ip6_forwarding; /* act as router? */ 258extern int ip6_forward_srcrt; /* forward src-routed? */ 259extern int ip6_gif_hlim; /* Hop limit for gif encap packet */ 260extern int ip6_use_deprecated; /* allow deprecated addr as source */ 261extern int ip6_rr_prune; /* router renumbering prefix 262 * walk list every 5 sec. */ 263extern int ip6_v6only; 264 265extern struct socket *ip6_mrouter; /* multicast routing daemon */ 266extern int ip6_sendredirects; /* send IP redirects when forwarding? */ 267extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */ 268extern int ip6_sourcecheck; /* Verify source interface */ 269extern int ip6_sourcecheck_interval; /* Interval between log messages */ 270extern int ip6_accept_rtadv; /* Acts as a host not a router */ 271extern int ip6_keepfaith; /* Firewall Aided Internet Translator */ 272extern int ip6_log_interval; 273extern time_t ip6_log_time; 274extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */ 275extern int ip6_dad_count; /* DupAddrDetectionTransmits */ 276 277extern u_int32_t ip6_flow_seq; 278extern int ip6_auto_flowlabel; 279extern int ip6_auto_linklocal; 280 281extern int ip6_anonportmin; /* minimum ephemeral port */ 282extern int ip6_anonportmax; /* maximum ephemeral port */ 283extern int ip6_lowportmin; /* minimum reserved port */ 284extern int ip6_lowportmax; /* maximum reserved port */ 285 286extern int ip6_use_tempaddr; /* whether to use temporary addresses. */ 287 288#ifdef PFIL_HOOKS 289extern struct pfil_head inet6_pfil_hook; 290#endif 291 292extern struct pr_usrreqs rip6_usrreqs; 293struct sockopt; 294 295struct inpcb; 296 297int icmp6_ctloutput __P((struct socket *, struct sockopt *sopt)); 298 299struct in6_ifaddr; 300void ip6_init __P((void)); 301void ip6_input __P((struct mbuf *)); 302struct in6_ifaddr *ip6_getdstifaddr __P((struct mbuf *)); 303void ip6_freepcbopts __P((struct ip6_pktopts *)); 304void ip6_freemoptions __P((struct ip6_moptions *)); 305int ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int)); 306char * ip6_get_prevhdr __P((struct mbuf *, int)); 307int ip6_nexthdr __P((struct mbuf *, int, int, int *)); 308int ip6_lasthdr __P((struct mbuf *, int, int, int *)); 309 310struct ip6aux *ip6_addaux __P((struct mbuf *)); 311struct ip6aux *ip6_findaux __P((struct mbuf *)); 312void ip6_delaux __P((struct mbuf *)); 313 314int ip6_mforward __P((struct ip6_hdr *, struct ifnet *, struct mbuf *)); 315int ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *, 316 u_int32_t *)); 317void ip6_savecontrol __P((struct inpcb *, struct mbuf **, struct ip6_hdr *, 318 struct mbuf *)); 319void ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *, 320 u_int32_t *)); 321int ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t)); 322 323void ip6_forward __P((struct mbuf *, int)); 324 325void ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *)); 326int ip6_output __P((struct mbuf *, struct ip6_pktopts *, 327 struct route_in6 *, 328 int, 329 struct ip6_moptions *, struct ifnet **, 330 struct inpcb *)); 331int ip6_ctloutput __P((struct socket *, struct sockopt *sopt)); 332void init_ip6pktopts __P((struct ip6_pktopts *)); 333int ip6_setpktoptions __P((struct mbuf *, struct ip6_pktopts *, int, int)); 334void ip6_clearpktopts __P((struct ip6_pktopts *, int, int)); 335struct ip6_pktopts *ip6_copypktopts __P((struct ip6_pktopts *, int)); 336int ip6_optlen __P((struct inpcb *)); 337 338int route6_input __P((struct mbuf **, int *, int)); 339 340void frag6_init __P((void)); 341int frag6_input __P((struct mbuf **, int *, int)); 342void frag6_slowtimo __P((void)); 343void frag6_drain __P((void)); 344 345void rip6_init __P((void)); 346int rip6_input __P((struct mbuf **mp, int *offp, int proto)); 347void rip6_ctlinput __P((int, struct sockaddr *, void *)); 348int rip6_ctloutput __P((struct socket *so, struct sockopt *sopt)); 349int rip6_output __P((struct mbuf *, ...)); 350int rip6_usrreq __P((struct socket *, 351 int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *)); 352 353int dest6_input __P((struct mbuf **, int *, int)); 354int none_input __P((struct mbuf **, int *, int)); 355 356u_int32_t ip6_randomid __P((void)); 357#endif /* _KERNEL */ 358 359#endif /* !_NETINET6_IP6_VAR_H_ */ 360