udp_var.h revision 1.31 
1/*	$OpenBSD: udp_var.h,v 1.31 2017/01/29 19:58:47 bluhm Exp $	*/
2/*	$NetBSD: udp_var.h,v 1.12 1996/02/13 23:44:41 christos Exp $	*/
3
4/*
5 * Copyright (c) 1982, 1986, 1989, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 *	@(#)udp_var.h	8.1 (Berkeley) 6/10/93
33 */
34
35#ifndef _NETINET_UDP_VAR_H_
36#define _NETINET_UDP_VAR_H_
37
38/*
39 * UDP kernel structures and variables.
40 */
41struct	udpiphdr {
42	struct	ipovly ui_i;		/* overlaid ip structure */
43	struct	udphdr ui_u;		/* udp header */
44};
45#define	ui_x1		ui_i.ih_x1
46#define	ui_pr		ui_i.ih_pr
47#define	ui_len		ui_i.ih_len
48#define	ui_src		ui_i.ih_src
49#define	ui_dst		ui_i.ih_dst
50#define	ui_sport	ui_u.uh_sport
51#define	ui_dport	ui_u.uh_dport
52#define	ui_ulen		ui_u.uh_ulen
53#define	ui_sum		ui_u.uh_sum
54
55struct	udpstat {
56				/* input statistics: */
57	u_long	udps_ipackets;		/* total input packets */
58	u_long	udps_hdrops;		/* packet shorter than header */
59	u_long	udps_badsum;		/* checksum error */
60	u_long	udps_nosum;		/* no checksum */
61	u_long	udps_badlen;		/* data length larger than packet */
62	u_long	udps_noport;		/* no socket on port */
63	u_long	udps_noportbcast;	/* of above, arrived as broadcast */
64	u_long	udps_nosec;		/* dropped for lack of ipsec */
65	u_long	udps_fullsock;		/* not delivered, input socket full */
66	u_long	udps_pcbhashmiss;	/* input packets missing pcb hash */
67	u_long	udps_inswcsum;		/* input software-csummed packets */
68				/* output statistics: */
69	u_long	udps_opackets;		/* total output packets */
70	u_long	udps_outswcsum;		/* output software-csummed packets */
71};
72
73/*
74 * Names for UDP sysctl objects
75 */
76#define	UDPCTL_CHECKSUM		1 /* checksum UDP packets */
77#define	UDPCTL_BADDYNAMIC	2 /* return bad dynamic port bitmap */
78#define UDPCTL_RECVSPACE	3 /* receive buffer space */
79#define UDPCTL_SENDSPACE	4 /* send buffer space */
80#define UDPCTL_STATS		5 /* UDP statistics */
81#define UDPCTL_ROOTONLY		6 /* root only port bitmap */
82#define UDPCTL_MAXID		7
83
84#define UDPCTL_NAMES { \
85	{ 0, 0 }, \
86	{ "checksum", CTLTYPE_INT }, \
87	{ "baddynamic", CTLTYPE_STRUCT }, \
88	{ "recvspace",  CTLTYPE_INT }, \
89	{ "sendspace",  CTLTYPE_INT }, \
90	{ "stats",	CTLTYPE_STRUCT }, \
91	{ "rootonly", CTLTYPE_STRUCT }, \
92}
93
94#define UDPCTL_VARS { \
95	NULL, \
96	&udpcksum, \
97	NULL, \
98	&udp_recvspace, \
99	&udp_sendspace, \
100	NULL, \
101	NULL \
102}
103
104#ifdef _KERNEL
105
106#include <sys/percpu.h>
107
108enum udpstat_counters {
109			/* input statistics: */
110	udps_ipackets,		/* total input packets */
111	udps_hdrops,		/* packet shorter than header */
112	udps_badsum,		/* checksum error */
113	udps_nosum,		/* no checksum */
114	udps_badlen,		/* data length larger than packet */
115	udps_noport,		/* no socket on port */
116	udps_noportbcast,	/* of above, arrived as broadcast */
117	udps_nosec,		/* dropped for lack of ipsec */
118	udps_fullsock,		/* not delivered, input socket full */
119	udps_pcbhashmiss,	/* input packets missing pcb hash */
120	udps_inswcsum,		/* input software-csummed packets */
121			/* output statistics: */
122	udps_opackets,		/* total output packets */
123	udps_outswcsum,		/* output software-csummed packets */
124
125	udps_ncounters
126};
127
128extern struct cpumem *udpcounters;
129
130static inline void
131udpstat_inc(enum udpstat_counters c)
132{
133	counters_inc(udpcounters, c);
134}
135
136extern struct	inpcbtable udbtable;
137extern struct	udpstat udpstat;
138
139#ifdef INET6
140void	udp6_ctlinput(int, struct sockaddr *, u_int, void *);
141#endif /* INET6 */
142void	 udp_ctlinput(int, struct sockaddr *, u_int, void *);
143void	 udp_init(void);
144int	 udp_input(struct mbuf **, int *, int);
145#ifdef INET6
146int	 udp6_output(struct inpcb *, struct mbuf *, struct mbuf *,
147	struct mbuf *);
148#endif /* INET6 */
149int	 udp_sysctl(int *, u_int, void *, size_t *, void *, size_t);
150int	 udp_usrreq(struct socket *,
151	    int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *);
152#endif /* _KERNEL */
153#endif /* _NETINET_UDP_VAR_H_ */
154