pcap-int.h revision 56891 
1/*
2 * Copyright (c) 1994, 1995, 1996
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-int.h 56891 2000-01-30 00:43:38Z fenner $
34 * @(#) $Header: /tcpdump/master/libpcap/pcap-int.h,v 1.20 1999/11/21 01:10:20 assar Exp $ (LBL)
35 */
36
37#ifndef pcap_int_h
38#define pcap_int_h
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44#include <pcap.h>
45
46/*
47 * Savefile
48 */
49struct pcap_sf {
50	FILE *rfile;
51	int swapped;
52	int version_major;
53	int version_minor;
54	u_char *base;
55};
56
57struct pcap_md {
58	struct pcap_stat stat;
59	/*XXX*/
60	int use_bpf;
61	u_long	TotPkts;	/* can't oflow for 79 hrs on ether */
62	u_long	TotAccepted;	/* count accepted by filter */
63	u_long	TotDrops;	/* count of dropped packets */
64	long	TotMissed;	/* missed by i/f during this run */
65	long	OrigMissed;	/* missed by i/f before this run */
66#ifdef linux
67	int pad;
68	int skip;
69	char *device;
70#endif
71};
72
73struct pcap {
74	int fd;
75	int snapshot;
76	int linktype;
77	int tzoff;		/* timezone offset */
78	int offset;		/* offset for proper alignment */
79
80	struct pcap_sf sf;
81	struct pcap_md md;
82
83	/*
84	 * Read buffer.
85	 */
86	int bufsize;
87	u_char *buffer;
88	u_char *bp;
89	int cc;
90
91	/*
92	 * Place holder for pcap_next().
93	 */
94	u_char *pkt;
95
96
97	/*
98	 * Placeholder for filter code if bpf not in kernel.
99	 */
100	struct bpf_program fcode;
101
102	char errbuf[PCAP_ERRBUF_SIZE];
103};
104
105/*
106 * This is a timeval as stored in disk in a dumpfile.
107 * It has to use the same types everywhere, independent of the actual
108 * `struct timeval'
109 */
110
111struct pcap_timeval {
112    bpf_int32 tv_sec;		/* seconds */
113    bpf_int32 tv_usec;		/* microseconds */
114};
115
116/*
117 * How a `pcap_pkthdr' is actually stored in the dumpfile.
118 */
119
120struct pcap_sf_pkthdr {
121    struct pcap_timeval ts;	/* time stamp */
122    bpf_u_int32 caplen;		/* length of portion present */
123    bpf_u_int32 len;		/* length this packet (off wire) */
124};
125
126int	yylex(void);
127
128#ifndef min
129#define min(a, b) ((a) > (b) ? (b) : (a))
130#endif
131
132/* XXX should these be in pcap.h? */
133int	pcap_offline_read(pcap_t *, int, pcap_handler, u_char *);
134int	pcap_read(pcap_t *, int cnt, pcap_handler, u_char *);
135
136/* Ultrix pads to make everything line up on a nice boundary */
137#if defined(ultrix) || defined(__alpha) || defined(__NetBSD__)
138#define       PCAP_FDDIPAD 3
139#endif
140
141/* XXX */
142extern	int pcap_fddipad;
143
144#ifdef __cplusplus
145}
146#endif
147
148#endif
149