pcap-linktype(7) - NetBSD Manual Pages

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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)