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Local changes: - In contrib/libpcap/pcap/bpf.h, do not include pcap/dlt.h. Our system net/dlt.h is pulled in from net/bpf.h. - sys/net/dlt.h: Incorporate changes from libpcap 1.10.3. - lib/libpcap/Makefile: Update for libpcap 1.10.3. Changelog: https://git.tcpdump.org/libpcap/blob/95691ebe7564afa3faa5c6ba0dbd17e351be455a:/CHANGES Reviewed by: emaste Obtained from: https://www.tcpdump.org/release/libpcap-1.10.3.tar.gz Sponsored by: The FreeBSD Foundation
49 lines
2.3 KiB
Plaintext
49 lines
2.3 KiB
Plaintext
.\" Copyright (c) 1987, 1988, 1989, 1990, 1991, 1992, 1994, 1995, 1996, 1997
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.\" The Regents of the University of California. All rights reserved.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that: (1) source code distributions
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.\" retain the above copyright notice and this paragraph in its entirety, (2)
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.\" distributions including binary code include the above copyright notice and
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.\" this paragraph in its entirety in the documentation or other materials
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.\" provided with the distribution, and (3) all advertising materials mentioning
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.\" features or use of this software display the following acknowledgement:
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.\" ``This product includes software developed by the University of California,
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.\" Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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.\" the University nor the names of its contributors may be used to endorse
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.\" or promote products derived from this software without specific prior
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.\" written permission.
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.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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.\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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.\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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.\"
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.TH PCAP-LINKTYPE @MAN_MISC_INFO@ "6 April 2020"
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.SH NAME
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pcap-linktype \- link-layer header types supported by libpcap
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.SH DESCRIPTION
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For a live capture or ``savefile'', libpcap supplies, as the return
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value of the
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.BR pcap_datalink (3PCAP)
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routine, a value that indicates the type of link-layer header at the
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beginning of the packets it provides. This is not necessarily the type
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of link-layer header that the packets being captured have on the network
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from which they're being captured; for example, packets from an IEEE
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802.11 network might be provided by libpcap with Ethernet headers that
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the network adapter or the network adapter driver generates from the
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802.11 headers. The names for those values begin with
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.BR DLT_ ,
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so they are sometimes called "DLT_ values".
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.PP
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The values stored in the link-layer header type field in the savefile
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header are, in most but not all cases, the same as the values returned
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by
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.BR pcap_datalink ().
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The names for those values begin with
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.BR LINKTYPE_ .
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.PP
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The link-layer header types supported by libpcap are described at
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https://www.tcpdump.org/linktypes.html .
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.SH SEE ALSO
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.BR pcap (3PCAP)
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