Wireshark
4.5.0
The Wireshark network protocol analyzer
Loading...
Searching...
No Matches
wiretap
libpcap.h
Go to the documentation of this file.
1
9
#ifndef __W_LIBPCAP_H__
10
#define __W_LIBPCAP_H__
11
12
#include <glib.h>
13
#include <
wiretap/wtap.h
>
14
#include "ws_symbol_export.h"
15
16
/* Magic numbers in "libpcap" files.
17
18
"libpcap" file records are written in the byte order of the host that
19
writes them, and the reader is expected to fix this up.
20
21
PCAP_MAGIC is the magic number, in host byte order; PCAP_SWAPPED_MAGIC
22
is a byte-swapped version of that.
23
24
PCAP_MODIFIED_MAGIC is for Alexey Kuznetsov's modified "libpcap"
25
format, as generated on Linux systems that have a "libpcap" with
26
his patches, at
27
28
http://ftp.sunet.se/pub/os/Linux/ip-routing/lbl-tools/
29
30
applied; PCAP_SWAPPED_MODIFIED_MAGIC is the byte-swapped version.
31
32
PCAP_IXIAMODIFIED_MAGIC is used by IXIA's lcap file format. It adds
33
a length field at the end of the file header (size of all records).
34
PCAP_SWAPPED_IXIAMODIFIED_MAGIC is the byte-swapped version.
35
36
PCAP_NSEC_MAGIC is for Ulf Lamping's modified "libpcap" format,
37
which uses the same common file format as PCAP_MAGIC, but the
38
timestamps are saved in nanosecond resolution instead of microseconds.
39
PCAP_SWAPPED_NSEC_MAGIC is a byte-swapped version of that. */
40
#define PCAP_MAGIC 0xa1b2c3d4
41
#define PCAP_SWAPPED_MAGIC 0xd4c3b2a1
42
#define PCAP_MODIFIED_MAGIC 0xa1b2cd34
43
#define PCAP_SWAPPED_MODIFIED_MAGIC 0x34cdb2a1
44
#define PCAP_IXIAHW_MAGIC 0x1c0001ac
45
#define PCAP_SWAPPED_IXIAHW_MAGIC 0xac01001c
46
#define PCAP_IXIASW_MAGIC 0x1c0001ab
47
#define PCAP_SWAPPED_IXIASW_MAGIC 0xab01001c
48
#define PCAP_NSEC_MAGIC 0xa1b23c4d
49
#define PCAP_SWAPPED_NSEC_MAGIC 0x4d3cb2a1
50
51
/* "libpcap" file header (minus magic number). */
52
struct
pcap_hdr
{
53
uint16_t version_major;
/* major version number */
54
uint16_t version_minor;
/* minor version number */
55
int32_t thiszone;
/* GMT to local correction */
56
uint32_t sigfigs;
/* accuracy of timestamps */
57
uint32_t snaplen;
/* max length of captured packets, in octets */
58
uint32_t network;
/* data link type */
59
};
60
61
/* "libpcap" record header. */
62
struct
pcaprec_hdr
{
63
uint32_t ts_sec;
/* timestamp seconds */
64
uint32_t ts_usec;
/* timestamp microseconds (nsecs for PCAP_NSEC_MAGIC) */
65
uint32_t incl_len;
/* number of octets of packet saved in file */
66
uint32_t orig_len;
/* actual length of packet */
67
};
68
69
/* "libpcap" record header for Alexey's patched version. */
70
struct
pcaprec_modified_hdr
{
71
struct
pcaprec_hdr
hdr;
/* the regular header */
72
uint32_t ifindex;
/* index, in *capturing* machine's list of
73
interfaces, of the interface on which this
74
packet came in. */
75
uint16_t protocol;
/* Ethernet packet type */
76
uint8_t pkt_type;
/* broadcast/multicast/etc. indication */
77
uint8_t pad;
/* pad to a 4-byte boundary */
78
};
79
80
/* "libpcap" record header for Alexey's patched version in its ss990915
81
incarnation; this version shows up in SuSE Linux 6.3. */
82
struct
pcaprec_ss990915_hdr
{
83
struct
pcaprec_hdr
hdr;
/* the regular header */
84
uint32_t ifindex;
/* index, in *capturing* machine's list of
85
interfaces, of the interface on which this
86
packet came in. */
87
uint16_t protocol;
/* Ethernet packet type */
88
uint8_t pkt_type;
/* broadcast/multicast/etc. indication */
89
uint8_t cpu1, cpu2;
/* SMP debugging gunk? */
90
uint8_t pad[3];
/* pad to a 4-byte boundary */
91
};
92
93
/* "libpcap" record header for version used on some Nokia boxes (firewalls?) */
94
struct
pcaprec_nokia_hdr
{
95
struct
pcaprec_hdr
hdr;
/* the regular header */
96
uint8_t stuff[4];
/* mysterious stuff */
97
};
98
99
wtap_open_return_val libpcap_open(
wtap
*wth,
int
*err,
char
**err_info);
100
101
#endif
pcap_hdr
Definition
libpcap.h:52
pcaprec_hdr
Definition
libpcap.h:62
pcaprec_modified_hdr
Definition
libpcap.h:70
pcaprec_nokia_hdr
Definition
libpcap.h:94
pcaprec_ss990915_hdr
Definition
libpcap.h:82
wtap
Definition
wtap-int.h:37
wtap.h
Generated by
1.9.8