forked from osmocom/wireshark
108 lines
4.0 KiB
C
108 lines
4.0 KiB
C
/* libpcap.h
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*
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* Wiretap Library
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* Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef __W_LIBPCAP_H__
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#define __W_LIBPCAP_H__
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#include <glib.h>
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#include <wiretap/wtap.h>
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#include "ws_symbol_export.h"
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/* Magic numbers in "libpcap" files.
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"libpcap" file records are written in the byte order of the host that
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writes them, and the reader is expected to fix this up.
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PCAP_MAGIC is the magic number, in host byte order; PCAP_SWAPPED_MAGIC
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is a byte-swapped version of that.
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PCAP_MODIFIED_MAGIC is for Alexey Kuznetsov's modified "libpcap"
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format, as generated on Linux systems that have a "libpcap" with
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his patches, at
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http://ftp.sunet.se/pub/os/Linux/ip-routing/lbl-tools/
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applied; PCAP_SWAPPED_MODIFIED_MAGIC is the byte-swapped version.
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PCAP_NSEC_MAGIC is for Ulf Lamping's modified "libpcap" format,
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which uses the same common file format as PCAP_MAGIC, but the
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timestamps are saved in nanosecond resolution instead of microseconds.
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PCAP_SWAPPED_NSEC_MAGIC is a byte-swapped version of that. */
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#define PCAP_MAGIC 0xa1b2c3d4
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#define PCAP_SWAPPED_MAGIC 0xd4c3b2a1
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#define PCAP_MODIFIED_MAGIC 0xa1b2cd34
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#define PCAP_SWAPPED_MODIFIED_MAGIC 0x34cdb2a1
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#define PCAP_NSEC_MAGIC 0xa1b23c4d
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#define PCAP_SWAPPED_NSEC_MAGIC 0x4d3cb2a1
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/* "libpcap" file header (minus magic number). */
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struct pcap_hdr {
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guint16 version_major; /* major version number */
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guint16 version_minor; /* minor version number */
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gint32 thiszone; /* GMT to local correction */
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guint32 sigfigs; /* accuracy of timestamps */
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guint32 snaplen; /* max length of captured packets, in octets */
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guint32 network; /* data link type */
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};
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/* "libpcap" record header. */
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struct pcaprec_hdr {
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guint32 ts_sec; /* timestamp seconds */
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guint32 ts_usec; /* timestamp microseconds (nsecs for PCAP_NSEC_MAGIC) */
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guint32 incl_len; /* number of octets of packet saved in file */
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guint32 orig_len; /* actual length of packet */
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};
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/* "libpcap" record header for Alexey's patched version. */
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struct pcaprec_modified_hdr {
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struct pcaprec_hdr hdr; /* the regular header */
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guint32 ifindex; /* index, in *capturing* machine's list of
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interfaces, of the interface on which this
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packet came in. */
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guint16 protocol; /* Ethernet packet type */
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guint8 pkt_type; /* broadcast/multicast/etc. indication */
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guint8 pad; /* pad to a 4-byte boundary */
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};
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/* "libpcap" record header for Alexey's patched version in its ss990915
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incarnation; this version shows up in SuSE Linux 6.3. */
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struct pcaprec_ss990915_hdr {
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struct pcaprec_hdr hdr; /* the regular header */
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guint32 ifindex; /* index, in *capturing* machine's list of
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interfaces, of the interface on which this
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packet came in. */
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guint16 protocol; /* Ethernet packet type */
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guint8 pkt_type; /* broadcast/multicast/etc. indication */
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guint8 cpu1, cpu2; /* SMP debugging gunk? */
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guint8 pad[3]; /* pad to a 4-byte boundary */
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};
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/* "libpcap" record header for version used on some Nokia boxes (firewalls?) */
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struct pcaprec_nokia_hdr {
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struct pcaprec_hdr hdr; /* the regular header */
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guint8 stuff[4]; /* mysterious stuff */
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};
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wtap_open_return_val libpcap_open(wtap *wth, int *err, gchar **err_info);
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gboolean libpcap_dump_open(wtap_dumper *wdh, int *err);
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int libpcap_dump_can_write_encap(int encap);
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#endif
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