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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(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 Eth-
       ernet  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(3PCAP)



                                23 October 2008               PCAP-LINKTYPE(7)