1/* $FreeBSD: src/sys/netinet6/ip6_var.h,v 1.2.2.2 2001/07/03 11:01:54 ume 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. 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#include <sys/appleapiopts.h> 71 72#ifdef KERNEL_PRIVATE 73/* 74 * IP6 reassembly queue structure. Each fragment 75 * being reassembled is attached to one of these structures. 76 */ 77struct ip6q { 78 u_int32_t ip6q_head; 79 u_int16_t ip6q_len; 80 u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */ 81 u_int8_t ip6q_hlim; 82 struct ip6asfrag *ip6q_down; 83 struct ip6asfrag *ip6q_up; 84 u_int32_t ip6q_ident; 85 u_int8_t ip6q_arrive; 86 u_int8_t ip6q_ttl; 87 struct in6_addr ip6q_src, ip6q_dst; 88 struct ip6q *ip6q_next; 89 struct ip6q *ip6q_prev; 90 int ip6q_unfrglen; /* len of unfragmentable part */ 91#if notyet 92 u_char *ip6q_nxtp; 93#endif 94 int ip6q_nfrag; /* number of fragments */ 95}; 96 97struct ip6asfrag { 98 u_int32_t ip6af_head; 99 u_int16_t ip6af_len; 100 u_int8_t ip6af_nxt; 101 u_int8_t ip6af_hlim; 102 /* must not override the above members during reassembling */ 103 struct ip6asfrag *ip6af_down; 104 struct ip6asfrag *ip6af_up; 105 struct mbuf *ip6af_m; 106 int ip6af_offset; /* offset in ip6af_m to next header */ 107 int ip6af_frglen; /* fragmentable part length */ 108 int ip6af_off; /* fragment offset */ 109 u_int16_t ip6af_mff; /* more fragment bit in frag off */ 110}; 111 112#define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m)) 113 114struct ip6_moptions { 115 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */ 116 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 117 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 118 LIST_HEAD(, in6_multi_mship) im6o_memberships; 119}; 120 121/* 122 * Control options for outgoing packets 123 */ 124 125/* Routing header related info */ 126struct ip6po_rhinfo { 127 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 128 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */ 129}; 130#define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 131#define ip6po_route ip6po_rhinfo.ip6po_rhi_route 132 133struct ip6_pktopts { 134 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */ 135 int ip6po_hlim; /* Hoplimit for outgoing packets */ 136 137 /* Outgoing IF/address information */ 138 struct in6_pktinfo *ip6po_pktinfo; 139 140 struct sockaddr *ip6po_nexthop; /* Next-hop address */ 141 142 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 143 144 /* Destination options header (before a routing header) */ 145 struct ip6_dest *ip6po_dest1; 146 147 /* Routing header related info. */ 148 struct ip6po_rhinfo ip6po_rhinfo; 149 150 /* Destination options header (after a routing header) */ 151 struct ip6_dest *ip6po_dest2; 152}; 153 154/* 155 * Control options for incoming packets 156 */ 157#endif /* KERNEL_PRIVATE */ 158 159struct ip6stat { 160 u_quad_t ip6s_total; /* total packets received */ 161 u_quad_t ip6s_tooshort; /* packet too short */ 162 u_quad_t ip6s_toosmall; /* not enough data */ 163 u_quad_t ip6s_fragments; /* fragments received */ 164 u_quad_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 165 u_quad_t ip6s_fragtimeout; /* fragments timed out */ 166 u_quad_t ip6s_fragoverflow; /* fragments that exceeded limit */ 167 u_quad_t ip6s_forward; /* packets forwarded */ 168 u_quad_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 169 u_quad_t ip6s_redirectsent; /* packets forwarded on same net */ 170 u_quad_t ip6s_delivered; /* datagrams delivered to upper level*/ 171 u_quad_t ip6s_localout; /* total ip packets generated here */ 172 u_quad_t ip6s_odropped; /* lost packets due to nobufs, etc. */ 173 u_quad_t ip6s_reassembled; /* total packets reassembled ok */ 174 u_quad_t ip6s_fragmented; /* datagrams sucessfully fragmented */ 175 u_quad_t ip6s_ofragments; /* output fragments created */ 176 u_quad_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 177 u_quad_t ip6s_badoptions; /* error in option processing */ 178 u_quad_t ip6s_noroute; /* packets discarded due to no route */ 179 u_quad_t ip6s_badvers; /* ip6 version != 6 */ 180 u_quad_t ip6s_rawout; /* total raw ip packets generated */ 181 u_quad_t ip6s_badscope; /* scope error */ 182 u_quad_t ip6s_notmember; /* don't join this multicast group */ 183 u_quad_t ip6s_nxthist[256]; /* next header history */ 184 u_quad_t ip6s_m1; /* one mbuf */ 185 u_quad_t ip6s_m2m[32]; /* two or more mbuf */ 186 u_quad_t ip6s_mext1; /* one ext mbuf */ 187 u_quad_t ip6s_mext2m; /* two or more ext mbuf */ 188 u_quad_t ip6s_exthdrtoolong; /* ext hdr are not continuous */ 189 u_quad_t ip6s_nogif; /* no match gif found */ 190 u_quad_t ip6s_toomanyhdr; /* discarded due to too many headers */ 191 192 /* 193 * statistics for improvement of the source address selection 194 * algorithm: 195 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 196 */ 197 /* number of times that address selection fails */ 198 u_quad_t ip6s_sources_none; 199 /* number of times that an address on the outgoing I/F is chosen */ 200 u_quad_t ip6s_sources_sameif[16]; 201 /* number of times that an address on a non-outgoing I/F is chosen */ 202 u_quad_t ip6s_sources_otherif[16]; 203 /* 204 * number of times that an address that has the same scope 205 * from the destination is chosen. 206 */ 207 u_quad_t ip6s_sources_samescope[16]; 208 /* 209 * number of times that an address that has a different scope 210 * from the destination is chosen. 211 */ 212 u_quad_t ip6s_sources_otherscope[16]; 213 /* number of times that an deprecated address is chosen */ 214 u_quad_t ip6s_sources_deprecated[16]; 215 216 u_quad_t ip6s_forward_cachehit; 217 u_quad_t ip6s_forward_cachemiss; 218}; 219 220#ifdef KERNEL_PRIVATE 221#ifdef KERNEL 222/* 223 * IPv6 onion peeling state. 224 * it will be initialized when we come into ip6_input(). 225 * XXX do not make it a kitchen sink! 226 */ 227struct ip6aux { 228 u_int32_t ip6a_flags; 229#define IP6A_SWAP 0x01 /* swapped home/care-of on packet */ 230#define IP6A_HASEEN 0x02 /* HA was present */ 231#define IP6A_BRUID 0x04 /* BR Unique Identifier was present */ 232#define IP6A_RTALERTSEEN 0x08 /* rtalert present */ 233 234 /* ip6.ip6_src */ 235 struct in6_addr ip6a_careof; /* care-of address of the peer */ 236 struct in6_addr ip6a_home; /* home address of the peer */ 237 u_int16_t ip6a_bruid; /* BR unique identifier */ 238 239 /* ip6.ip6_dst */ 240 struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */ 241 242 /* rtalert */ 243 u_int16_t ip6a_rtalert; /* rtalert option value */ 244 245 /* 246 * decapsulation history will be here. 247 * with IPsec it may not be accurate. 248 */ 249}; 250 251/* flags passed to ip6_output as last parameter */ 252#define IPV6_DADOUTPUT 0x01 /* DAD */ 253#define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 254#define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 255 256extern struct ip6stat ip6stat; /* statistics */ 257extern u_int32_t ip6_id; /* fragment identifier */ 258extern int ip6_defhlim; /* default hop limit */ 259extern int ip6_defmcasthlim; /* default multicast hop limit */ 260extern int ip6_forwarding; /* act as router? */ 261extern int ip6_forward_srcrt; /* forward src-routed? */ 262extern int ip6_gif_hlim; /* Hop limit for gif encap packet */ 263extern int ip6_use_deprecated; /* allow deprecated addr as source */ 264extern int ip6_rr_prune; /* router renumbering prefix 265 * walk list every 5 sec. */ 266#define ip6_mapped_addr_on (!ip6_v6only) 267extern int ip6_v6only; 268 269extern int ip6_neighborgcthresh; /* Threshold # of NDP entries for GC */ 270extern int ip6_maxifprefixes; /* Max acceptable prefixes via RA per IF */ 271extern int ip6_maxifdefrouters; /* Max acceptable def routers via RA */ 272extern int ip6_maxdynroutes; /* Max # of routes created via redirect */ 273 274extern struct socket *ip6_mrouter; /* multicast routing daemon */ 275extern int ip6_sendredirects; /* send IP redirects when forwarding? */ 276extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */ 277extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */ 278extern int ip6_sourcecheck; /* Verify source interface */ 279extern int ip6_sourcecheck_interval; /* Interval between log messages */ 280extern int ip6_accept_rtadv; /* Acts as a host not a router */ 281extern int ip6_keepfaith; /* Firewall Aided Internet Translator */ 282extern int ip6_log_interval; 283extern time_t ip6_log_time; 284extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */ 285extern int ip6_dad_count; /* DupAddrDetectionTransmits */ 286 287extern u_int32_t ip6_flow_seq; 288extern int ip6_auto_flowlabel; 289extern int ip6_auto_linklocal; 290 291extern int ip6_anonportmin; /* minimum ephemeral port */ 292extern int ip6_anonportmax; /* maximum ephemeral port */ 293extern int ip6_lowportmin; /* minimum reserved port */ 294extern int ip6_lowportmax; /* maximum reserved port */ 295 296extern int ip6_use_tempaddr; /* whether to use temporary addresses. */ 297 298extern struct pr_usrreqs rip6_usrreqs; 299extern struct pr_usrreqs icmp6_dgram_usrreqs; 300struct sockopt; 301 302struct inpcb; 303 304int icmp6_ctloutput(struct socket *, struct sockopt *); 305int icmp6_dgram_ctloutput(struct socket *, struct sockopt *); 306int icmp6_dgram_send(struct socket *, int , struct mbuf *, struct sockaddr *, struct mbuf *, struct proc *); 307int icmp6_dgram_attach(struct socket *, int , struct proc *); 308 309 310struct in6_ifaddr; 311void ip6_init(void); 312void ip6intr(void); 313void ip6_input(struct mbuf *); 314struct in6_ifaddr *ip6_getdstifaddr(struct mbuf *); 315void ip6_freepcbopts(struct ip6_pktopts *); 316void ip6_freemoptions(struct ip6_moptions *); 317int ip6_unknown_opt(u_int8_t *, struct mbuf *, int, int); 318char * ip6_get_prevhdr(struct mbuf *, int); 319int ip6_nexthdr(struct mbuf *, int, int, int *); 320int ip6_lasthdr(struct mbuf *, int, int, int *); 321 322struct ip6aux *ip6_addaux(struct mbuf *); 323struct ip6aux *ip6_findaux(struct mbuf *); 324void ip6_delaux(struct mbuf *); 325 326int ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *); 327int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *, 328 u_int32_t *); 329void ip6_savecontrol(struct inpcb *, struct mbuf **, struct ip6_hdr *, 330 struct mbuf *); 331void ip6_notify_pmtu(struct inpcb *, struct sockaddr_in6 *, 332 u_int32_t *); 333int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); 334 335void ip6_forward(struct mbuf *, struct route_in6 *, int, int); 336 337void ip6_mloopback(struct ifnet *, struct mbuf *, struct sockaddr_in6 *); 338int ip6_output(struct mbuf *, struct ip6_pktopts *, 339 struct route_in6 *, 340 int, 341 struct ip6_moptions *, struct ifnet **, int locked); 342int ip6_ctloutput(struct socket *, struct sockopt *sopt); 343void init_ip6pktopts(struct ip6_pktopts *); 344int ip6_setpktoptions(struct mbuf *, struct ip6_pktopts *, int, int); 345void ip6_clearpktopts(struct ip6_pktopts *, int, int); 346struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int); 347int ip6_optlen(struct inpcb *); 348 349int route6_input(struct mbuf **, int *); 350 351void frag6_init(void); 352int frag6_input(struct mbuf **, int *); 353void frag6_slowtimo(void); 354void frag6_drain(void); 355 356void rip6_init(void); 357int rip6_input(struct mbuf **mp, int *offset); 358void rip6_ctlinput(int, struct sockaddr *, void *); 359int rip6_ctloutput(struct socket *so, struct sockopt *sopt); 360int rip6_output(struct mbuf *, struct socket *, struct sockaddr_in6 *, struct mbuf *); 361int rip6_usrreq(struct socket *, 362 int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *); 363 364int dest6_input(struct mbuf **, int *); 365int none_input(struct mbuf **, int *); 366#endif /* KERNEL */ 367#endif /* KERNEL_PRIVATE */ 368 369#endif /* !_NETINET6_IP6_VAR_H_ */ 370