1/*	$NetBSD: udp_var.h,v 1.48 2021/02/03 11:53:43 roy 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};
44#ifdef CTASSERT
45CTASSERT(sizeof(struct udpiphdr) == 28);
46#endif
47#define	ui_x1		ui_i.ih_x1
48#define	ui_pr		ui_i.ih_pr
49#define	ui_len		ui_i.ih_len
50#define	ui_src		ui_i.ih_src
51#define	ui_dst		ui_i.ih_dst
52#define	ui_sport	ui_u.uh_sport
53#define	ui_dport	ui_u.uh_dport
54#define	ui_ulen		ui_u.uh_ulen
55#define	ui_sum		ui_u.uh_sum
56
57/*
58 * UDP statistics.
59 * Each counter is an unsigned 64-bit value.
60 */
61#define	UDP_STAT_IPACKETS	0	/* total input packets */
62#define	UDP_STAT_HDROPS		1	/* packet shorter than header */
63#define	UDP_STAT_BADSUM		2	/* checksum error */
64#define	UDP_STAT_BADLEN		3	/* data length larger than packet */
65#define	UDP_STAT_NOPORT		4	/* no socket on port */
66#define	UDP_STAT_NOPORTBCAST	5	/* of above, arrived as broadcast */
67#define	UDP_STAT_FULLSOCK	6	/* not delivered, input socket full */
68#define	UDP_STAT_PCBHASHMISS	7	/* input packets missing PCB hash */
69#define	UDP_STAT_OPACKETS	8	/* total output packets */
70
71#define	UDP_NSTATS		9
72
73/*
74 * Names for UDP sysctl objects
75 */
76#define	UDPCTL_CHECKSUM		1	/* checksum UDP packets */
77#define	UDPCTL_SENDSPACE	2	/* default send buffer */
78#define	UDPCTL_RECVSPACE	3	/* default recv buffer */
79#define	UDPCTL_LOOPBACKCKSUM	4	/* do UDP checksum on loopback */
80#define	UDPCTL_STATS		5	/* UDP statistics */
81
82#ifdef _KERNEL
83
84extern struct inpcbtable udbtable;
85extern const struct pr_usrreqs udp_usrreqs;
86
87void *udp_ctlinput(int, const struct sockaddr *, void *);
88int udp_ctloutput(int, struct socket *, struct sockopt *);
89void udp_init(void);
90void udp_init_common(void);
91void udp_input(struct mbuf *, int, int);
92int udp_output(struct mbuf *, struct inpcb *, struct mbuf *, struct lwp *);
93int udp_send(struct socket *, struct mbuf *, struct sockaddr *,
94    struct mbuf *, struct lwp *);
95int udp_input_checksum(int af, struct mbuf *, const struct udphdr *, int, int);
96void udp_statinc(u_int);
97#endif /* _KERNEL */
98
99#endif /* !_NETINET_UDP_VAR_H_ */