1/* SPDX-License-Identifier: BSD-3-Clause */
2/*
3 * Copyright (c) 1982, 1986, 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the University nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * @(#)udp.h 8.1 (Berkeley) 6/10/93
31 * udp.h,v 1.3 1994/08/21 05:27:41 paul Exp
32 */
33
34#ifndef UDP_H
35#define UDP_H
36
37#define UDP_TTL 0x60
38#define UDP_UDPDATALEN 16192
39
40/*
41 * Udp protocol header.
42 * Per RFC 768, September, 1981.
43 */
44struct udphdr {
45 uint16_t uh_sport; /* source port */
46 uint16_t uh_dport; /* destination port */
47 int16_t uh_ulen; /* udp length */
48 uint16_t uh_sum; /* udp checksum */
49};
50
51/*
52 * UDP kernel structures and variables.
53 */
54struct udpiphdr {
55 struct ipovly ui_i; /* overlaid ip structure */
56 struct udphdr ui_u; /* udp header */
57};
58#define ui_mbuf ui_i.ih_mbuf.mptr
59#define ui_x1 ui_i.ih_x1
60#define ui_pr ui_i.ih_pr
61#define ui_len ui_i.ih_len
62#define ui_src ui_i.ih_src
63#define ui_dst ui_i.ih_dst
64#define ui_sport ui_u.uh_sport
65#define ui_dport ui_u.uh_dport
66#define ui_ulen ui_u.uh_ulen
67#define ui_sum ui_u.uh_sum
68
69/*
70 * Names for UDP sysctl objects
71 */
72#define UDPCTL_CHECKSUM 1 /* checksum UDP packets */
73#define UDPCTL_MAXID 2
74
75struct mbuf;
76
77void udp_init(Slirp *);
78void udp_cleanup(Slirp *);
79void udp_input(register struct mbuf *, int);
80int udp_attach(struct socket *, unsigned short af);
81void udp_detach(struct socket *);
82struct socket *udp_listen(Slirp *, uint32_t, unsigned, uint32_t, unsigned, int);
83int udp_output(struct socket *so, struct mbuf *m, struct sockaddr_in *saddr,
84 struct sockaddr_in *daddr, int iptos);
85
86void udp6_input(register struct mbuf *);
87int udp6_output(struct socket *so, struct mbuf *m, struct sockaddr_in6 *saddr,
88 struct sockaddr_in6 *daddr);
89
90#endif
91