Much to my astonishment, packets in the loopback net were being
[unix-history] / sys / netinet / udp_var.h
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1/*
2 * Copyright (c) 1982, 1986, 1989 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 *
38e82238 33 * from: @(#)udp_var.h 7.7 (Berkeley) 6/28/90
fde1aeb2 34 * $Id: udp_var.h,v 1.3 1993/11/07 17:48:16 wollman Exp $
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35 */
36
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37#ifndef _NETINET_UDP_VAR_H_
38#define _NETINET_UDP_VAR_H_ 1
39
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40/*
41 * UDP kernel structures and variables.
42 */
43struct udpiphdr {
44 struct ipovly ui_i; /* overlaid ip structure */
45 struct udphdr ui_u; /* udp header */
46};
47#define ui_next ui_i.ih_next
48#define ui_prev ui_i.ih_prev
49#define ui_x1 ui_i.ih_x1
50#define ui_pr ui_i.ih_pr
51#define ui_len ui_i.ih_len
52#define ui_src ui_i.ih_src
53#define ui_dst ui_i.ih_dst
54#define ui_sport ui_u.uh_sport
55#define ui_dport ui_u.uh_dport
56#define ui_ulen ui_u.uh_ulen
57#define ui_sum ui_u.uh_sum
58
59struct udpstat {
60 /* input statistics: */
61 int udps_ipackets; /* total input packets */
62 int udps_hdrops; /* packet shorter than header */
63 int udps_badsum; /* checksum error */
64 int udps_badlen; /* data length larger than packet */
65 int udps_noport; /* no socket on port */
66 int udps_noportbcast; /* of above, arrived as broadcast */
67 int udps_fullsock; /* not delivered, input socket full */
68 int udpps_pcbcachemiss; /* input packets missing pcb cache */
69 /* output statistics: */
70 int udps_opackets; /* total output packets */
71};
72
73#define UDP_TTL 30 /* default time to live for UDP packets */
74
75#ifdef KERNEL
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76extern struct inpcb udb;
77extern struct udpstat udpstat;
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78
79/* From in_var.h: */
80extern int udpcksum;
81extern int udp_ttl;
82extern u_long udp_sendspace;
83extern u_long udp_recvspace;
84
85#endif /* KERNEL */
8ace4366 86#endif /* _NETINET_UDP_VAR_H_ */