49 lines
2.3 KiB
Plaintext
49 lines
2.3 KiB
Plaintext
.\" Copyright (c) 1987, 1988, 1989, 1990, 1991, 1992, 1994, 1995, 1996, 1997
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that: (1) source code distributions
|
|
.\" retain the above copyright notice and this paragraph in its entirety, (2)
|
|
.\" distributions including binary code include the above copyright notice and
|
|
.\" this paragraph in its entirety in the documentation or other materials
|
|
.\" provided with the distribution, and (3) all advertising materials mentioning
|
|
.\" features or use of this software display the following acknowledgement:
|
|
.\" ``This product includes software developed by the University of California,
|
|
.\" Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
|
|
.\" the University nor the names of its contributors may be used to endorse
|
|
.\" or promote products derived from this software without specific prior
|
|
.\" written permission.
|
|
.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
|
|
.\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
|
|
.\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
.\"
|
|
.TH PCAP-LINKTYPE @MAN_MISC_INFO@ "12 March 2011"
|
|
.SH NAME
|
|
pcap-linktype \- link-layer header types supported by libpcap
|
|
.SH DESCRIPTION
|
|
For a live capture or ``savefile'', libpcap supplies, as the return
|
|
value of the
|
|
.BR pcap_datalink (3PCAP)
|
|
routine, a value that indicates the type of link-layer header at the
|
|
beginning of the packets it provides. This is not necessarily the type
|
|
of link-layer header that the packets being captured have on the network
|
|
from which they're being captured; for example, packets from an IEEE
|
|
802.11 network might be provided by libpcap with Ethernet headers that
|
|
the network adapter or the network adapter driver generates from the
|
|
802.11 headers. The names for those values begin with
|
|
.BR DLT_ ,
|
|
so they are sometimes called "DLT_ values".
|
|
.PP
|
|
The values stored in the link-layer header type field in the savefile
|
|
header are, in most but not all cases, the same as the values returned
|
|
by
|
|
.BR pcap_datalink() .
|
|
The names for those values begin with
|
|
.BR LINKTYPE_ .
|
|
.PP
|
|
The link-layer header types supported by libpcap are described at
|
|
http://www.tcpdump.org/linktypes.html.
|
|
.SH SEE ALSO
|
|
pcap_datalink(3PCAP)
|