pcap.h revision 56891 
1/*
2 * Copyright (c) 1993, 1994, 1995, 1996, 1997
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 Computer Systems
16 *	Engineering Group at Lawrence Berkeley Laboratory.
17 * 4. Neither the name of the University nor of the Laboratory may be used
18 *    to endorse or promote products derived from this software without
19 *    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 * $FreeBSD: head/contrib/libpcap/pcap.h 56891 2000-01-30 00:43:38Z fenner $
34 * @(#) $Header: /tcpdump/master/libpcap/pcap.h,v 1.22 1999/12/08 19:54:03 mcr Exp $ (LBL)
35 */
36
37#ifndef lib_pcap_h
38#define lib_pcap_h
39
40#include <sys/types.h>
41#include <sys/time.h>
42
43#include <net/bpf.h>
44
45#include <stdio.h>
46
47#ifdef __cplusplus
48extern "C" {
49#endif
50
51
52#define PCAP_VERSION_MAJOR 2
53#define PCAP_VERSION_MINOR 4
54
55#define PCAP_ERRBUF_SIZE 256
56
57/*
58 * Compatibility for systems that have a bpf.h that
59 * predates the bpf typedefs for 64-bit support.
60 */
61#if BPF_RELEASE - 0 < 199406
62typedef	int bpf_int32;
63typedef	u_int bpf_u_int32;
64#endif
65
66typedef struct pcap pcap_t;
67typedef struct pcap_dumper pcap_dumper_t;
68
69/*
70 * The first record in the file contains saved values for some
71 * of the flags used in the printout phases of tcpdump.
72 * Many fields here are 32 bit ints so compilers won't insert unwanted
73 * padding; these files need to be interchangeable across architectures.
74 */
75struct pcap_file_header {
76	bpf_u_int32 magic;
77	u_short version_major;
78	u_short version_minor;
79	bpf_int32 thiszone;	/* gmt to local correction */
80	bpf_u_int32 sigfigs;	/* accuracy of timestamps */
81	bpf_u_int32 snaplen;	/* max length saved portion of each pkt */
82	bpf_u_int32 linktype;	/* data link type (DLT_*) */
83};
84
85/*
86 * Each packet in the dump file is prepended with this generic header.
87 * This gets around the problem of different headers for different
88 * packet interfaces.
89 */
90struct pcap_pkthdr {
91	struct timeval ts;	/* time stamp */
92	bpf_u_int32 caplen;	/* length of portion present */
93	bpf_u_int32 len;	/* length this packet (off wire) */
94};
95
96/*
97 * As returned by the pcap_stats()
98 */
99struct pcap_stat {
100	u_int ps_recv;		/* number of packets received */
101	u_int ps_drop;		/* number of packets dropped */
102	u_int ps_ifdrop;	/* drops by interface XXX not yet supported */
103};
104
105typedef void (*pcap_handler)(u_char *, const struct pcap_pkthdr *,
106			     const u_char *);
107
108char	*pcap_lookupdev(char *);
109int	pcap_lookupnet(char *, bpf_u_int32 *, bpf_u_int32 *, char *);
110pcap_t	*pcap_open_live(char *, int, int, int, char *);
111pcap_t	*pcap_open_offline(const char *, char *);
112void	pcap_close(pcap_t *);
113int	pcap_loop(pcap_t *, int, pcap_handler, u_char *);
114int	pcap_dispatch(pcap_t *, int, pcap_handler, u_char *);
115const u_char*
116	pcap_next(pcap_t *, struct pcap_pkthdr *);
117int	pcap_stats(pcap_t *, struct pcap_stat *);
118int	pcap_setfilter(pcap_t *, struct bpf_program *);
119void	pcap_perror(pcap_t *, char *);
120char	*pcap_strerror(int);
121char	*pcap_geterr(pcap_t *);
122int	pcap_compile(pcap_t *, struct bpf_program *, char *, int,
123	    bpf_u_int32);
124int	pcap_compile_nopcap(int, int, struct bpf_program *,
125	    char *, int, bpf_u_int32);
126/* XXX */
127int	pcap_freecode(pcap_t *, struct bpf_program *);
128int	pcap_datalink(pcap_t *);
129int	pcap_snapshot(pcap_t *);
130int	pcap_is_swapped(pcap_t *);
131int	pcap_major_version(pcap_t *);
132int	pcap_minor_version(pcap_t *);
133
134/* XXX */
135FILE	*pcap_file(pcap_t *);
136int	pcap_fileno(pcap_t *);
137
138pcap_dumper_t *pcap_dump_open(pcap_t *, const char *);
139void	pcap_dump_close(pcap_dumper_t *);
140void	pcap_dump(u_char *, const struct pcap_pkthdr *, const u_char *);
141
142/* XXX this guy lives in the bpf tree */
143u_int	bpf_filter(struct bpf_insn *, u_char *, u_int, u_int);
144char	*bpf_image(struct bpf_insn *, int);
145
146#ifdef __cplusplus
147}
148#endif
149
150
151#endif
152