1/* $NetBSD: udp_var.h,v 1.41 2016/01/20 22:01:18 riastradh Exp $ */
2
3/*
4 * Copyright (c) 1982, 1986, 1989, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93
32 */
33
34#ifndef _NETINET_UDP_VAR_H_
35#define _NETINET_UDP_VAR_H_
36
37/*
38 * UDP kernel structures and variables.
39 */
40struct udpiphdr {
41 struct ipovly ui_i; /* overlaid ip structure */
42 struct udphdr ui_u; /* udp header */
43} __packed;
44#define ui_x1 ui_i.ih_x1
45#define ui_pr ui_i.ih_pr
46#define ui_len ui_i.ih_len
47#define ui_src ui_i.ih_src
48#define ui_dst ui_i.ih_dst
49#define ui_sport ui_u.uh_sport
50#define ui_dport ui_u.uh_dport
51#define ui_ulen ui_u.uh_ulen
52#define ui_sum ui_u.uh_sum
53
54/*
55 * UDP statistics.
56 * Each counter is an unsigned 64-bit value.
57 */
58#define UDP_STAT_IPACKETS 0 /* total input packets */
59#define UDP_STAT_HDROPS 1 /* packet shorter than header */
60#define UDP_STAT_BADSUM 2 /* checksum error */
61#define UDP_STAT_BADLEN 3 /* data length larger than packet */
62#define UDP_STAT_NOPORT 4 /* no socket on port */
63#define UDP_STAT_NOPORTBCAST 5 /* of above, arrived as broadcast */
64#define UDP_STAT_FULLSOCK 6 /* not delivered, input socket full */
65#define UDP_STAT_PCBHASHMISS 7 /* input packets missing PCB hash */
66#define UDP_STAT_OPACKETS 8 /* total output packets */
67
68#define UDP_NSTATS 9
69
70/*
71 * Names for UDP sysctl objects
72 */
73#define UDPCTL_CHECKSUM 1 /* checksum UDP packets */
74#define UDPCTL_SENDSPACE 2 /* default send buffer */
75#define UDPCTL_RECVSPACE 3 /* default recv buffer */
76#define UDPCTL_LOOPBACKCKSUM 4 /* do UDP checksum on loopback */
77#define UDPCTL_STATS 5 /* UDP statistics */
78#define UDPCTL_MAXID 7
79
80#define UDPCTL_NAMES { \
81 { 0, 0 }, \
82 { "checksum", CTLTYPE_INT }, \
83 { "sendspace", CTLTYPE_INT }, \
84 { "recvspace", CTLTYPE_INT }, \
85 { "do_loopback_cksum", CTLTYPE_INT }, \
86 { "stats", CTLTYPE_STRUCT }, \
87}
88
89#ifdef _KERNEL
90
91extern struct inpcbtable udbtable;
92extern const struct pr_usrreqs udp_usrreqs;
93
94void *udp_ctlinput(int, const struct sockaddr *, void *);
95int udp_ctloutput(int, struct socket *, struct sockopt *);
96void udp_init(void);
97void udp_init_common(void);
98void udp_input(struct mbuf *, ...);
99int udp_output(struct mbuf *, struct inpcb *);
100int udp_sysctl(int *, u_int, void *, size_t *, void *, size_t);
101
102int udp_input_checksum(int af, struct mbuf *, const struct udphdr *, int,
103 int);
104void udp_statinc(u_int);
105#endif /* _KERNEL */
106
107#endif /* !_NETINET_UDP_VAR_H_ */
108