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1.1 root 1: /*
2: * Copyright (c) 1982, 1986 Regents of the University of California.
3: * 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 7.7 (Berkeley) 6/28/90
34: */
35:
36: /*
37: * Overlay for ip header used by other protocols (tcp, udp).
38: */
39: struct ipovly {
40: caddr_t ih_next, ih_prev; /* for protocol sequence q's */
41: u_char ih_x1; /* (unused) */
42: u_char ih_pr; /* protocol */
43: short ih_len; /* protocol length */
44: struct in_addr ih_src; /* source internet address */
45: struct in_addr ih_dst; /* destination internet address */
46: };
47:
48: /*
49: * Ip reassembly queue structure. Each fragment
50: * being reassembled is attached to one of these structures.
51: * They are timed out after ipq_ttl drops to 0, and may also
52: * be reclaimed if memory becomes tight.
53: */
54: struct ipq {
55: struct ipq *next,*prev; /* to other reass headers */
56: u_char ipq_ttl; /* time for reass q to live */
57: u_char ipq_p; /* protocol of this fragment */
58: u_short ipq_id; /* sequence id for reassembly */
59: struct ipasfrag *ipq_next,*ipq_prev;
60: /* to ip headers of fragments */
61: struct in_addr ipq_src,ipq_dst;
62: };
63:
64: /*
65: * Ip header, when holding a fragment.
66: *
67: * Note: ipf_next must be at same offset as ipq_next above
68: */
69: struct ipasfrag {
70: #if BYTE_ORDER == LITTLE_ENDIAN
71: u_char ip_hl:4,
72: ip_v:4;
73: #endif
74: #if BYTE_ORDER == BIG_ENDIAN
75: u_char ip_v:4,
76: ip_hl:4;
77: #endif
78: u_char ipf_mff; /* copied from (ip_off&IP_MF) */
79: short ip_len;
80: u_short ip_id;
81: short ip_off;
82: u_char ip_ttl;
83: u_char ip_p;
84: u_short ip_sum;
85: struct ipasfrag *ipf_next; /* next fragment */
86: struct ipasfrag *ipf_prev; /* previous fragment */
87: };
88:
89: /*
90: * Structure stored in mbuf in inpcb.ip_options
91: * and passed to ip_output when ip options are in use.
92: * The actual length of the options (including ipopt_dst)
93: * is in m_len.
94: */
95: #define MAX_IPOPTLEN 40
96:
97: struct ipoption {
98: struct in_addr ipopt_dst; /* first-hop dst if source routed */
99: char ipopt_list[MAX_IPOPTLEN]; /* options proper */
100: };
101:
102: struct ipstat {
103: long ips_total; /* total packets received */
104: long ips_badsum; /* checksum bad */
105: long ips_tooshort; /* packet too short */
106: long ips_toosmall; /* not enough data */
107: long ips_badhlen; /* ip header length < data size */
108: long ips_badlen; /* ip length < ip header length */
109: long ips_fragments; /* fragments received */
110: long ips_fragdropped; /* frags dropped (dups, out of space) */
111: long ips_fragtimeout; /* fragments timed out */
112: long ips_forward; /* packets forwarded */
113: long ips_cantforward; /* packets rcvd for unreachable dest */
114: long ips_redirectsent; /* packets forwarded on same net */
115: long ips_noproto; /* unknown or unsupported protocol */
116: long ips_delivered; /* packets consumed here */
117: long ips_localout; /* total ip packets generated here */
118: long ips_odropped; /* lost packets due to nobufs, etc. */
119: long ips_reassembled; /* total packets reassembled ok */
120: long ips_fragmented; /* output packets fragmented ok */
121: long ips_ofragments; /* output fragments created */
122: long ips_cantfrag; /* don't fragment flag was set, etc. */
123: };
124:
125: #ifdef KERNEL
126: /* flags passed to ip_output as last parameter */
127: #define IP_FORWARDING 0x1 /* most of ip header exists */
128: #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */
129: #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */
130:
131: struct ipstat ipstat;
132: struct ipq ipq; /* ip reass. queue */
133: u_short ip_id; /* ip packet ctr, for ids */
134:
135: struct mbuf *ip_srcroute();
136: #endif
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