udp_var.h revision 50477 
1/*
2 * Copyright (c) 1982, 1986, 1989, 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. 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 *
33 *	@(#)udp_var.h	8.1 (Berkeley) 6/10/93
34 * $FreeBSD: head/sys/netinet/udp_var.h 50477 1999-08-28 01:08:13Z peter $
35 */
36
37#ifndef _NETINET_UDP_VAR_H_
38#define _NETINET_UDP_VAR_H_
39
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_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
57struct	udpcb {
58	/* XXX - these should be by reference so we can do options quickly */
59	struct	ip udb_ip;
60	struct	udphdr udb_uh;
61	struct	sockaddr_in udb_conn;
62	struct	in_hostcache *udb_hc;
63	struct	mbuf *udb_queue;
64};
65#define	inptoudpcb(inp)	((struct udpdb *)(inp)->inp_ppcb)
66
67struct	udpstat {
68				/* input statistics: */
69	u_long	udps_ipackets;		/* total input packets */
70	u_long	udps_hdrops;		/* packet shorter than header */
71	u_long	udps_badsum;		/* checksum error */
72	u_long	udps_badlen;		/* data length larger than packet */
73	u_long	udps_noport;		/* no socket on port */
74	u_long	udps_noportbcast;	/* of above, arrived as broadcast */
75	u_long	udps_fullsock;		/* not delivered, input socket full */
76	u_long	udpps_pcbcachemiss;	/* input packets missing pcb cache */
77	u_long	udpps_pcbhashmiss;	/* input packets not for hashed pcb */
78				/* output statistics: */
79	u_long	udps_opackets;		/* total output packets */
80	u_long	udps_fastout;		/* output packets on fast path */
81};
82
83/*
84 * Names for UDP sysctl objects
85 */
86#define	UDPCTL_CHECKSUM		1	/* checksum UDP packets */
87#define UDPCTL_STATS		2	/* statistics (read-only) */
88#define	UDPCTL_MAXDGRAM		3	/* max datagram size */
89#define	UDPCTL_RECVSPACE	4	/* default receive buffer space */
90#define	UDPCTL_PCBLIST		5	/* list of PCBs for UDP sockets */
91#define UDPCTL_MAXID		6
92
93#define UDPCTL_NAMES { \
94	{ 0, 0 }, \
95	{ "checksum", CTLTYPE_INT }, \
96	{ "stats", CTLTYPE_STRUCT }, \
97	{ "maxdgram", CTLTYPE_INT }, \
98	{ "recvspace", CTLTYPE_INT }, \
99	{ "pcblist", CTLTYPE_STRUCT }, \
100}
101
102#ifdef KERNEL
103SYSCTL_DECL(_net_inet_udp);
104
105extern struct	pr_usrreqs udp_usrreqs;
106extern struct	inpcbinfo udbinfo;
107
108void	 udp_ctlinput __P((int, struct sockaddr *, void *));
109void	 udp_init __P((void));
110void	 udp_input __P((struct mbuf *, int));
111#endif
112
113#endif
114