pcap_datalink(3PCAP) man page
Updated: 7 April 2014
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pcap_datalink - get the link-layer header type
int pcap_datalink(pcap_t *p);
returns the link-layer header type for the live capture or ``savefile''
It must not be called on a pcap descriptor created by
that has not yet been activated by
lists the values
can return and describes the packet formats that
correspond to those values.
assume that the packets for a given capture or ``savefile`` will have
any given link-layer header type, such as
for Ethernet. For example, the "any" device on Linux will have a
link-layer header type of
even if all devices on the system at the time the "any" device is opened
have some other data link type, such as
returns the link-layer header type on success and
if called on a capture handle that has been created but not activated.
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