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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  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(3PCAP)

                             7 April 2014                 PCAP-LINKTYPE(7)



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