Annotation of embedaddon/pimdd/include/freebsd/netinet/ip_var.h, revision 1.1.1.1
1.1 misho 1: /*
2: * Copyright (c) 1982, 1986, 1993
3: * The Regents of the University of California. All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: *
33: * @(#)ip_var.h 8.2 (Berkeley) 1/9/95
34: * $Id: ip_var.h,v 1.1.1.1 1998/05/11 17:39:35 kurtw Exp $
35: */
36:
37: #ifndef _NETINET_IP_VAR_H_
38: #define _NETINET_IP_VAR_H_
39:
40: /*
41: * Overlay for ip header used by other protocols (tcp, udp).
42: */
43: struct ipovly {
44: caddr_t ih_next, ih_prev; /* for protocol sequence q's */
45: u_char ih_x1; /* (unused) */
46: u_char ih_pr; /* protocol */
47: u_short ih_len; /* protocol length */
48: struct in_addr ih_src; /* source internet address */
49: struct in_addr ih_dst; /* destination internet address */
50: };
51:
52: /*
53: * Ip reassembly queue structure. Each fragment
54: * being reassembled is attached to one of these structures.
55: * They are timed out after ipq_ttl drops to 0, and may also
56: * be reclaimed if memory becomes tight.
57: */
58: struct ipq {
59: struct ipq *next,*prev; /* to other reass headers */
60: u_char ipq_ttl; /* time for reass q to live */
61: u_char ipq_p; /* protocol of this fragment */
62: u_short ipq_id; /* sequence id for reassembly */
63: struct ipasfrag *ipq_next,*ipq_prev;
64: /* to ip headers of fragments */
65: struct in_addr ipq_src,ipq_dst;
66: #ifdef IPDIVERT
67: u_short ipq_divert; /* divert protocol port */
68: #endif
69: };
70:
71: /*
72: * Ip header, when holding a fragment.
73: *
74: * Note: ipf_next must be at same offset as ipq_next above
75: */
76: struct ipasfrag {
77: #if BYTE_ORDER == LITTLE_ENDIAN
78: u_char ip_hl:4,
79: ip_v:4;
80: #endif
81: #if BYTE_ORDER == BIG_ENDIAN
82: u_char ip_v:4,
83: ip_hl:4;
84: #endif
85: u_char ipf_mff; /* XXX overlays ip_tos: use low bit
86: * to avoid destroying tos;
87: * copied from (ip_off&IP_MF) */
88: u_short ip_len;
89: u_short ip_id;
90: u_short ip_off;
91: u_char ip_ttl;
92: u_char ip_p;
93: u_short ip_sum;
94: struct ipasfrag *ipf_next; /* next fragment */
95: struct ipasfrag *ipf_prev; /* previous fragment */
96: };
97:
98: /*
99: * Structure stored in mbuf in inpcb.ip_options
100: * and passed to ip_output when ip options are in use.
101: * The actual length of the options (including ipopt_dst)
102: * is in m_len.
103: */
104: #define MAX_IPOPTLEN 40
105:
106: struct ipoption {
107: struct in_addr ipopt_dst; /* first-hop dst if source routed */
108: char ipopt_list[MAX_IPOPTLEN]; /* options proper */
109: };
110:
111: /*
112: * Structure attached to inpcb.ip_moptions and
113: * passed to ip_output when IP multicast options are in use.
114: */
115: struct ip_moptions {
116: struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
117: u_char imo_multicast_ttl; /* TTL for outgoing multicasts */
118: u_char imo_multicast_loop; /* 1 => hear sends if a member */
119: u_short imo_num_memberships; /* no. memberships this socket */
120: struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
121: u_long imo_multicast_vif; /* vif num outgoing multicasts */
122: };
123:
124: struct ipstat {
125: u_long ips_total; /* total packets received */
126: u_long ips_badsum; /* checksum bad */
127: u_long ips_tooshort; /* packet too short */
128: u_long ips_toosmall; /* not enough data */
129: u_long ips_badhlen; /* ip header length < data size */
130: u_long ips_badlen; /* ip length < ip header length */
131: u_long ips_fragments; /* fragments received */
132: u_long ips_fragdropped; /* frags dropped (dups, out of space) */
133: u_long ips_fragtimeout; /* fragments timed out */
134: u_long ips_forward; /* packets forwarded */
135: u_long ips_cantforward; /* packets rcvd for unreachable dest */
136: u_long ips_redirectsent; /* packets forwarded on same net */
137: u_long ips_noproto; /* unknown or unsupported protocol */
138: u_long ips_delivered; /* datagrams delivered to upper level*/
139: u_long ips_localout; /* total ip packets generated here */
140: u_long ips_odropped; /* lost packets due to nobufs, etc. */
141: u_long ips_reassembled; /* total packets reassembled ok */
142: u_long ips_fragmented; /* datagrams successfully fragmented */
143: u_long ips_ofragments; /* output fragments created */
144: u_long ips_cantfrag; /* don't fragment flag was set, etc. */
145: u_long ips_badoptions; /* error in option processing */
146: u_long ips_noroute; /* packets discarded due to no route */
147: u_long ips_badvers; /* ip version != 4 */
148: u_long ips_rawout; /* total raw ip packets generated */
149: u_long ips_toolong; /* ip length > max ip packet size */
150: };
151:
152: #ifdef KERNEL
153: /* flags passed to ip_output as last parameter */
154: #define IP_FORWARDING 0x1 /* most of ip header exists */
155: #define IP_RAWOUTPUT 0x2 /* raw ip header exists */
156: #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */
157: #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
158:
159: struct inpcb;
160: struct route;
161:
162: extern struct ipstat ipstat;
163: extern struct ipq ipq; /* ip reass. queue */
164: extern u_short ip_id; /* ip packet ctr, for ids */
165: extern int ip_defttl; /* default IP ttl */
166: extern u_char ip_protox[];
167: extern struct socket *ip_rsvpd; /* reservation protocol daemon */
168: extern struct socket *ip_mrouter; /* multicast routing daemon */
169: extern int (*legal_vif_num) __P((int));
170: extern u_long (*ip_mcast_src) __P((int));
171: extern int rsvp_on;
172:
173: int ip_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
174: void ip_drain __P((void));
175: void ip_freemoptions __P((struct ip_moptions *));
176: void ip_init __P((void));
177: extern int (*ip_mforward) __P((struct ip *, struct ifnet *, struct mbuf *,
178: struct ip_moptions *));
179: int ip_output __P((struct mbuf *,
180: struct mbuf *, struct route *, int, struct ip_moptions *));
181: void ip_savecontrol __P((struct inpcb *, struct mbuf **, struct ip *,
182: struct mbuf *));
183: void ip_slowtimo __P((void));
184: struct mbuf *
185: ip_srcroute __P((void));
186: void ip_stripoptions __P((struct mbuf *, struct mbuf *));
187: int rip_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
188: void rip_init __P((void));
189: void rip_input __P((struct mbuf *, int));
190: int rip_output __P((struct mbuf *, struct socket *, u_long));
191: int rip_usrreq __P((struct socket *,
192: int, struct mbuf *, struct mbuf *, struct mbuf *));
193: void ipip_input __P((struct mbuf *, int));
194: void rsvp_input __P((struct mbuf *, int));
195: int ip_rsvp_init __P((struct socket *));
196: int ip_rsvp_done __P((void));
197: int ip_rsvp_vif_init __P((struct socket *, struct mbuf *));
198: int ip_rsvp_vif_done __P((struct socket *, struct mbuf *));
199: void ip_rsvp_force_done __P((struct socket *));
200:
201: void pim_input __P((struct mbuf *, int )); /* Protocol Independent
202: * Multicast input machinery
203: */
204:
205: #ifdef IPDIVERT
206: void div_init __P((void));
207: void div_input __P((struct mbuf *, int));
208: int div_usrreq __P((struct socket *,
209: int, struct mbuf *, struct mbuf *, struct mbuf *));
210: extern u_short ip_divert_port;
211: extern u_short ip_divert_ignore;
212: #endif /* IPDIVERT */
213:
214: #endif /* KERNEL */
215:
216: #endif /* _NETINET_IP_VAR_H_ */
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