pcap-linktype(7) - phpMan

PCAP-LINKTYPE(7)                 Miscellaneous Information Manual                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  cap-
       tured;  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.tcp-
       dump.org/linktypes.html.

SEE ALSO
       pcap_datalink(3PCAP)



                                         23 October 2008                         PCAP-LINKTYPE(7)

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