1 /* $OpenBSD: ip6_var.h,v 1.36 2008/11/25 12:11:45 markus Exp $ */ 2 /* $KAME: ip6_var.h,v 1.33 2000/06/11 14:59:20 jinmei 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 /* 68 * IP6 reassembly queue structure. Each fragment 69 * being reassembled is attached to one of these structures. 70 */ 71 struct ip6q { 72 u_int32_t ip6q_head; 73 u_int16_t ip6q_len; 74 u_int8_t ip6q_nxt; /* ip6f_nxt in first fragment */ 75 u_int8_t ip6q_hlim; 76 struct ip6asfrag *ip6q_down; 77 struct ip6asfrag *ip6q_up; 78 u_int32_t ip6q_ident; 79 u_int8_t ip6q_arrive; 80 u_int8_t ip6q_ttl; 81 struct in6_addr ip6q_src, ip6q_dst; 82 struct ip6q *ip6q_next; 83 struct ip6q *ip6q_prev; 84 int ip6q_unfrglen; /* len of unfragmentable part */ 85 #ifdef notyet 86 u_char *ip6q_nxtp; 87 #endif 88 int ip6q_nfrag; /* # of fragments */ 89 }; 90 91 struct ip6asfrag { 92 u_int32_t ip6af_head; 93 u_int16_t ip6af_len; 94 u_int8_t ip6af_nxt; 95 u_int8_t ip6af_hlim; 96 /* must not override the above members during reassembling */ 97 struct ip6asfrag *ip6af_down; 98 struct ip6asfrag *ip6af_up; 99 struct mbuf *ip6af_m; 100 int ip6af_offset; /* offset in ip6af_m to next header */ 101 int ip6af_frglen; /* fragmentable part length */ 102 int ip6af_off; /* fragment offset */ 103 u_int16_t ip6af_mff; /* more fragment bit in frag off */ 104 }; 105 106 #define IP6_REASS_MBUF(ip6af) ((ip6af)->ip6af_m) 107 108 struct ip6_moptions { 109 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */ 110 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 111 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 112 LIST_HEAD(, in6_multi_mship) im6o_memberships; 113 }; 114 115 /* 116 * Control options for outgoing packets 117 */ 118 119 /* Routing header related info */ 120 struct ip6po_rhinfo { 121 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 122 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */ 123 }; 124 #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 125 #define ip6po_route ip6po_rhinfo.ip6po_rhi_route 126 127 /* Nexthop related info */ 128 struct ip6po_nhinfo { 129 struct sockaddr *ip6po_nhi_nexthop; 130 struct route_in6 ip6po_nhi_route; 131 }; 132 #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop 133 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route 134 135 struct ip6_pktopts { 136 /* Hoplimit for outgoing packets */ 137 int ip6po_hlim; 138 139 /* Outgoing IF/address information */ 140 struct in6_pktinfo *ip6po_pktinfo; 141 142 /* Next-hop address information */ 143 struct ip6po_nhinfo ip6po_nhinfo; 144 145 /* Hop-by-Hop options header */ 146 struct ip6_hbh *ip6po_hbh; 147 148 /* Destination options header (before a routing header) */ 149 struct ip6_dest *ip6po_dest1; 150 151 /* Routing header related info. */ 152 struct ip6po_rhinfo ip6po_rhinfo; 153 154 /* Destination options header (after a routing header) */ 155 struct ip6_dest *ip6po_dest2; 156 157 /* traffic class */ 158 int ip6po_tclass; 159 160 /* fragment vs PMTU discovery policy */ 161 int ip6po_minmtu; 162 #define IP6PO_MINMTU_MCASTONLY -1 /* default: send at min MTU for multicast */ 163 #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ 164 #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ 165 166 int ip6po_flags; 167 #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ 168 }; 169 170 struct ip6stat { 171 u_int64_t ip6s_total; /* total packets received */ 172 u_int64_t ip6s_tooshort; /* packet too short */ 173 u_int64_t ip6s_toosmall; /* not enough data */ 174 u_int64_t ip6s_fragments; /* fragments received */ 175 u_int64_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ 176 u_int64_t ip6s_fragtimeout; /* fragments timed out */ 177 u_int64_t ip6s_fragoverflow; /* fragments that exceeded limit */ 178 u_int64_t ip6s_forward; /* packets forwarded */ 179 u_int64_t ip6s_cantforward; /* packets rcvd for unreachable dest */ 180 u_int64_t ip6s_redirectsent; /* packets forwarded on same net */ 181 u_int64_t ip6s_delivered; /* datagrams delivered to upper level*/ 182 u_int64_t ip6s_localout; /* total ip packets generated here */ 183 u_int64_t ip6s_odropped; /* lost packets due to nobufs, etc. */ 184 u_int64_t ip6s_reassembled; /* total packets reassembled ok */ 185 u_int64_t ip6s_fragmented; /* datagrams successfully fragmented */ 186 u_int64_t ip6s_ofragments; /* output fragments created */ 187 u_int64_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ 188 u_int64_t ip6s_badoptions; /* error in option processing */ 189 u_int64_t ip6s_noroute; /* packets discarded due to no route */ 190 u_int64_t ip6s_badvers; /* ip6 version != 6 */ 191 u_int64_t ip6s_rawout; /* total raw ip packets generated */ 192 u_int64_t ip6s_badscope; /* scope error */ 193 u_int64_t ip6s_notmember; /* don't join this multicast group */ 194 u_int64_t ip6s_nxthist[256]; /* next header history */ 195 u_int64_t ip6s_m1; /* one mbuf */ 196 u_int64_t ip6s_m2m[32]; /* two or more mbuf */ 197 u_int64_t ip6s_mext1; /* one ext mbuf */ 198 u_int64_t ip6s_mext2m; /* two or more ext mbuf */ 199 u_int64_t ip6s_exthdrtoolong; /* ext hdr are not continuous */ 200 u_int64_t ip6s_nogif; /* no match gif found */ 201 u_int64_t ip6s_toomanyhdr; /* discarded due to too many headers */ 202 203 /* 204 * statistics for improvement of the source address selection 205 * algorithm: 206 * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 207 */ 208 /* number of times that address selection fails */ 209 u_int64_t ip6s_sources_none; 210 /* number of times that an address on the outgoing I/F is chosen */ 211 u_int64_t ip6s_sources_sameif[16]; 212 /* number of times that an address on a non-outgoing I/F is chosen */ 213 u_int64_t ip6s_sources_otherif[16]; 214 /* 215 * number of times that an address that has the same scope 216 * from the destination is chosen. 217 */ 218 u_int64_t ip6s_sources_samescope[16]; 219 /* 220 * number of times that an address that has a different scope 221 * from the destination is chosen. 222 */ 223 u_int64_t ip6s_sources_otherscope[16]; 224 /* number of times that an deprecated address is chosen */ 225 u_int64_t ip6s_sources_deprecated[16]; 226 227 u_int64_t ip6s_forward_cachehit; 228 u_int64_t ip6s_forward_cachemiss; 229 }; 230 231 #ifdef _KERNEL 232 /* flags passed to ip6_output as last parameter */ 233 #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */ 234 #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 235 #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ 236 237 extern struct ip6stat ip6stat; /* statistics */ 238 extern int ip6_defhlim; /* default hop limit */ 239 extern int ip6_defmcasthlim; /* default multicast hop limit */ 240 extern int ip6_forwarding; /* act as router? */ 241 extern int ip6_mforwarding; /* act as multicast router? */ 242 extern int ip6_multipath; /* use multipath routes */ 243 extern int ip6_sendredirect; /* send ICMPv6 redirect? */ 244 extern int ip6_forward_srcrt; /* forward src-routed? */ 245 extern int ip6_use_deprecated; /* allow deprecated addr as source */ 246 extern int ip6_rr_prune; /* router renumbering prefix 247 * walk list every 5 sec. */ 248 extern int ip6_mcast_pmtu; /* path MTU discovery for multicast */ 249 extern const int ip6_v6only; 250 extern int ip6_neighborgcthresh; /* Threshold # of NDP entries for GC */ 251 extern int ip6_maxifprefixes; /* Max acceptable prefixes via RA per IF */ 252 extern int ip6_maxifdefrouters; /* Max acceptable def routers via RA */ 253 extern int ip6_maxdynroutes; /* Max # of routes created via redirect */ 254 255 extern struct socket *ip6_mrouter; /* multicast routing daemon */ 256 extern int ip6_sendredirects; /* send IP redirects when forwarding? */ 257 extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */ 258 extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */ 259 extern int ip6_sourcecheck; /* Verify source interface */ 260 extern int ip6_sourcecheck_interval; /* Interval between log messages */ 261 extern int ip6_accept_rtadv; /* Acts as a host not a router */ 262 extern int ip6_keepfaith; /* Firewall Aided Internet Translator */ 263 extern int ip6_log_interval; 264 extern time_t ip6_log_time; 265 extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */ 266 extern int ip6_dad_count; /* DupAddrDetectionTransmits */ 267 extern int ip6_dad_pending; /* number of currently running DADs */ 268 269 extern int ip6_auto_flowlabel; 270 extern int ip6_auto_linklocal; 271 272 struct in6pcb; 273 struct inpcb; 274 275 int icmp6_ctloutput(int, struct socket *, int, int, struct mbuf **); 276 277 void ip6_init(void); 278 void ip6intr(void); 279 void ip6_input(struct mbuf *); 280 void ip6_freepcbopts(struct ip6_pktopts *); 281 void ip6_freemoptions(struct ip6_moptions *); 282 int ip6_unknown_opt(u_int8_t *, struct mbuf *, int); 283 u_int8_t *ip6_get_prevhdr(struct mbuf *, int); 284 int ip6_nexthdr(struct mbuf *, int, int, int *); 285 int ip6_lasthdr(struct mbuf *, int, int, int *); 286 int ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *); 287 int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *, 288 u_int32_t *); 289 void ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **); 290 int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); 291 292 void ip6_forward(struct mbuf *, int); 293 294 void ip6_mloopback(struct ifnet *, struct mbuf *, struct sockaddr_in6 *); 295 int ip6_output(struct mbuf *, struct ip6_pktopts *, struct route_in6 *, int, 296 struct ip6_moptions *, struct ifnet **, struct inpcb *); 297 int ip6_ctloutput(int, struct socket *, int, int, struct mbuf **); 298 int ip6_raw_ctloutput(int, struct socket *, int, int, struct mbuf **); 299 void ip6_initpktopts(struct ip6_pktopts *); 300 int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *, 301 struct ip6_pktopts *, int, int); 302 void ip6_clearpktopts(struct ip6_pktopts *, int); 303 int ip6_optlen(struct inpcb *); 304 void ip6_randomid_init(void); 305 u_int32_t ip6_randomid(void); 306 307 int route6_input(struct mbuf **, int *, int); 308 309 void frag6_init(void); 310 int frag6_input(struct mbuf **, int *, int); 311 void frag6_slowtimo(void); 312 void frag6_drain(void); 313 314 void rip6_init(void); 315 int rip6_input(struct mbuf **mp, int *offp, int proto); 316 void rip6_ctlinput(int, struct sockaddr *, void *); 317 int rip6_ctloutput(int, struct socket *, int, int, struct mbuf **); 318 int rip6_output(struct mbuf *, ...); 319 int rip6_usrreq(struct socket *, 320 int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *); 321 int rip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); 322 323 int dest6_input(struct mbuf **, int *, int); 324 int none_input(struct mbuf **, int *, int); 325 326 struct in6_addr *in6_selectsrc(struct sockaddr_in6 *, struct ip6_pktopts *, 327 struct ip6_moptions *, struct route_in6 *, struct in6_addr *, 328 int *); 329 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *, 330 struct ip6_moptions *, struct route_in6 *, struct ifnet **, 331 struct rtentry **); 332 333 u_int32_t ip6_randomflowlabel(void); 334 #endif /* _KERNEL */ 335 336 #endif /* !_NETINET6_IP6_VAR_H_ */ 337