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. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *	@(#)udp.h	8.1 (Berkeley) 6/10/93
30 * udp.h,v 1.3 1994/08/21 05:27:41 paul Exp
31 */
32
33#ifndef _UDP_H_
34#define _UDP_H_
35
36#include "helper.h"
37
38#define UDP_TTL 0x60
39#define UDP_UDPDATALEN 16192
40
41extern struct socket *udp_last_so;
42
43/*
44 * Udp protocol header.
45 * Per RFC 768, September, 1981.
46 */
47struct udphdr {
48	port_t	uh_sport;		/* source port */
49	port_t	uh_dport;		/* destination port */
50	int16_t	uh_ulen;		/* udp length */
51	u_int16_t	uh_sum;			/* udp checksum */
52};
53
54/*
55 * UDP kernel structures and variables.
56 */
57struct udpiphdr {
58	        struct  ipovly ui_i;            /* overlaid ip structure */
59	        struct  udphdr ui_u;            /* udp header */
60};
61#define ui_mbuf         ui_i.ih_mbuf.mptr
62#define ui_x1           ui_i.ih_x1
63#define ui_pr           ui_i.ih_pr
64#define ui_len          ui_i.ih_len
65#define ui_src          ui_i.ih_src
66#define ui_dst          ui_i.ih_dst
67#define ui_sport        ui_u.uh_sport
68#define ui_dport        ui_u.uh_dport
69#define ui_ulen         ui_u.uh_ulen
70#define ui_sum          ui_u.uh_sum
71
72struct udpstat {
73	                                /* input statistics: */
74	        u_long  udps_ipackets;          /* total input packets */
75	        u_long  udps_hdrops;            /* packet shorter than header */
76	        u_long  udps_badsum;            /* checksum error */
77	        u_long  udps_badlen;            /* data length larger than packet */
78	        u_long  udps_noport;            /* no socket on port */
79	        u_long  udps_noportbcast;       /* of above, arrived as broadcast */
80	        u_long  udps_fullsock;          /* not delivered, input socket full */
81	        u_long  udpps_pcbcachemiss;     /* input packets missing pcb cache */
82	                                /* output statistics: */
83	        u_long  udps_opackets;          /* total output packets */
84};
85
86/*
87 * Names for UDP sysctl objects
88 */
89#define UDPCTL_CHECKSUM         1       /* checksum UDP packets */
90#define UDPCTL_MAXID            2
91
92extern struct udpstat udpstat;
93
94extern struct socket udb;
95struct mbuf;
96
97void udp_init _P((void));
98void udp_input _P((register struct mbuf *, int));
99int udp_output_ _P((struct socket *, struct mbuf *, SockAddress *));
100int udp_attach _P((struct socket *));
101void udp_detach _P((struct socket *));
102struct socket * udp_listen _P((u_int, u_int32_t, u_int, int));
103int udp_unlisten _P((u_int));
104
105int udp_output2_(struct socket *so, struct mbuf *m,
106                const SockAddress *saddr, const SockAddress *daddr,
107                int iptos);
108#endif
109