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PCAP-LINKTYPE(7)					      PCAP-LINKTYPE(7)

NAME

pcap-linktype - link-layer header types supported by libpcap

DESCRIPTION

For a live capture or ``savefile'', libpcap supplies, as the return value of the pcap_datalink(3) 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 libp- cap 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 DLT_, so they are sometimes called "DLT_ values". 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 pcap_datalink(). The names for those values begin with LINKTYPE_. The link-layer header types supported by libpcap are described at http://www.tcpdump.org/linktypes.html.

SEE ALSO

pcap_datalink(3) 23 October 2008 PCAP-LINKTYPE(7)