2 * Copyright (c) 1994, 1995, 1996
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
33 * @(#) $Header: /tcpdump/master/libpcap/pcap-int.h,v 1.33 2001/08/24 07:46:52 guy Exp $ (LBL)
60 struct pcap_stat stat;
62 int use_bpf; /* using kernel filter */
63 u_long TotPkts; /* can't oflow for 79 hrs on ether */
64 u_long TotAccepted; /* count accepted by filter */
65 u_long TotDrops; /* count of dropped packets */
66 long TotMissed; /* missed by i/f during this run */
67 long OrigMissed; /* missed by i/f before this run */
69 int sock_packet; /* using Linux 2.0 compatible interface */
70 int timeout; /* timeout specified to pcap_open_live */
71 int clear_promisc; /* must clear promiscuous mode when we close */
72 int cooked; /* using SOCK_DGRAM rather than SOCK_RAW */
73 int lo_ifindex; /* interface index of the loopback device */
74 char *device; /* device name */
75 struct pcap *next; /* list of open promiscuous sock_packet pcaps */
83 int tzoff; /* timezone offset */
84 int offset; /* offset for proper alignment */
98 * Place holder for pcap_next().
104 * Placeholder for filter code if bpf not in kernel.
106 struct bpf_program fcode;
108 char errbuf[PCAP_ERRBUF_SIZE];
114 * This is a timeval as stored in disk in a dumpfile.
115 * It has to use the same types everywhere, independent of the actual
119 struct pcap_timeval {
120 bpf_int32 tv_sec; /* seconds */
121 bpf_int32 tv_usec; /* microseconds */
125 * How a `pcap_pkthdr' is actually stored in the dumpfile.
127 * Do not change the format of this structure, in any way (this includes
128 * changes that only affect the length of fields in this structure),
129 * and do not make the time stamp anything other than seconds and
130 * microseconds (e.g., seconds and nanoseconds). Instead:
132 * introduce a new structure for the new format;
134 * send mail to "tcpdump-workers@tcpdump.org", requesting a new
135 * magic number for your new capture file format, and, when
136 * you get the new magic number, put it in "savefile.c";
138 * use that magic number for save files with the changed record
141 * make the code in "savefile.c" capable of reading files with
142 * the old record header as well as files with the new record header
143 * (using the magic number to determine the header format).
145 * Then supply the changes to "patches@tcpdump.org", so that future
146 * versions of libpcap and programs that use it (such as tcpdump) will
147 * be able to read your new capture file format.
150 struct pcap_sf_pkthdr {
151 struct pcap_timeval ts; /* time stamp */
152 bpf_u_int32 caplen; /* length of portion present */
153 bpf_u_int32 len; /* length this packet (off wire) */
157 * How a `pcap_pkthdr' is actually stored in dumpfiles written
158 * by some patched versions of libpcap (e.g. the ones in Red
159 * Hat Linux 6.1 and 6.2).
161 * Do not change the format of this structure, in any way (this includes
162 * changes that only affect the length of fields in this structure).
163 * Instead, introduce a new structure, as per the above.
166 struct pcap_sf_patched_pkthdr {
167 struct pcap_timeval ts; /* time stamp */
168 bpf_u_int32 caplen; /* length of portion present */
169 bpf_u_int32 len; /* length this packet (off wire) */
171 unsigned short protocol;
172 unsigned char pkt_type;
178 #define min(a, b) ((a) > (b) ? (b) : (a))
181 /* XXX should these be in pcap.h? */
182 int pcap_offline_read(pcap_t *, int, pcap_handler, u_char *);
183 int pcap_read(pcap_t *, int cnt, pcap_handler, u_char *);
186 * Ultrix, DEC OSF/1^H^H^H^H^H^H^H^H^HDigital UNIX^H^H^H^H^H^H^H^H^H^H^H^H
187 * Tru64 UNIX, and NetBSD pad to make everything line up on a nice boundary.
189 #if defined(ultrix) || defined(__osf__) || defined(__NetBSD__)
190 #define PCAP_FDDIPAD 3
194 #define strlcpy(x, y, z) \
195 (strncpy((x), (y), (z)), \
196 ((z) <= 0 ? 0 : ((x)[(z) - 1] = '\0')), \
201 void pcap_close_linux(pcap_t *);
205 extern int pcap_fddipad;
207 int install_bpf_program(pcap_t *, struct bpf_program *);