Annotation of sys/netinet6/ip6_var.h, Revision 1.1.1.1
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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