Annotation of sys/netinet6/ip6_var.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: ip6_var.h,v 1.31 2007/06/01 00:52:38 henning 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:
! 251: extern struct socket *ip6_mrouter; /* multicast routing daemon */
! 252: extern int ip6_sendredirects; /* send IP redirects when forwarding? */
! 253: extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */
! 254: extern int ip6_maxfrags; /* Maximum fragments in reassembly queue */
! 255: extern int ip6_sourcecheck; /* Verify source interface */
! 256: extern int ip6_sourcecheck_interval; /* Interval between log messages */
! 257: extern int ip6_accept_rtadv; /* Acts as a host not a router */
! 258: extern int ip6_keepfaith; /* Firewall Aided Internet Translator */
! 259: extern int ip6_log_interval;
! 260: extern time_t ip6_log_time;
! 261: extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */
! 262: extern int ip6_dad_count; /* DupAddrDetectionTransmits */
! 263:
! 264: extern int ip6_auto_flowlabel;
! 265: extern int ip6_auto_linklocal;
! 266:
! 267: struct in6pcb;
! 268: struct inpcb;
! 269:
! 270: int icmp6_ctloutput(int, struct socket *, int, int, struct mbuf **);
! 271:
! 272: void ip6_init(void);
! 273: void ip6intr(void);
! 274: void ip6_input(struct mbuf *);
! 275: void ip6_freepcbopts(struct ip6_pktopts *);
! 276: void ip6_freemoptions(struct ip6_moptions *);
! 277: int ip6_unknown_opt(u_int8_t *, struct mbuf *, int);
! 278: u_int8_t *ip6_get_prevhdr(struct mbuf *, int);
! 279: int ip6_nexthdr(struct mbuf *, int, int, int *);
! 280: int ip6_lasthdr(struct mbuf *, int, int, int *);
! 281: int ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *);
! 282: int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
! 283: u_int32_t *);
! 284: void ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **);
! 285: int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
! 286:
! 287: void ip6_forward(struct mbuf *, int);
! 288:
! 289: void ip6_mloopback(struct ifnet *, struct mbuf *, struct sockaddr_in6 *);
! 290: int ip6_output(struct mbuf *, struct ip6_pktopts *, struct route_in6 *, int,
! 291: struct ip6_moptions *, struct ifnet **, struct inpcb *);
! 292: int ip6_ctloutput(int, struct socket *, int, int, struct mbuf **);
! 293: int ip6_raw_ctloutput(int, struct socket *, int, int, struct mbuf **);
! 294: void ip6_initpktopts(struct ip6_pktopts *);
! 295: int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *,
! 296: struct ip6_pktopts *, int, int);
! 297: void ip6_clearpktopts(struct ip6_pktopts *, int);
! 298: struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int);
! 299: int ip6_optlen(struct inpcb *);
! 300:
! 301: int route6_input(struct mbuf **, int *, int);
! 302:
! 303: void frag6_init(void);
! 304: int frag6_input(struct mbuf **, int *, int);
! 305: void frag6_slowtimo(void);
! 306: void frag6_drain(void);
! 307:
! 308: void rip6_init(void);
! 309: int rip6_input(struct mbuf **mp, int *offp, int proto);
! 310: void rip6_ctlinput(int, struct sockaddr *, void *);
! 311: int rip6_ctloutput(int, struct socket *, int, int, struct mbuf **);
! 312: int rip6_output(struct mbuf *, ...);
! 313: int rip6_usrreq(struct socket *,
! 314: int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *);
! 315:
! 316: int dest6_input(struct mbuf **, int *, int);
! 317: int none_input(struct mbuf **, int *, int);
! 318:
! 319: struct in6_addr *in6_selectsrc(struct sockaddr_in6 *, struct ip6_pktopts *,
! 320: struct ip6_moptions *, struct route_in6 *, struct in6_addr *,
! 321: int *);
! 322: int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *,
! 323: struct ip6_moptions *, struct route_in6 *, struct ifnet **,
! 324: struct rtentry **);
! 325:
! 326: u_int32_t ip6_randomid(void);
! 327: u_int32_t ip6_randomflowlabel(void);
! 328: #endif /* _KERNEL */
! 329:
! 330: #endif /* !_NETINET6_IP6_VAR_H_ */
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