pcap_lookupdev(3PCAP) man page
Updated: 8 September 2017
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pcap_lookupdev - find the default device on which to capture
[DEPRECATED] char *pcap_lookupdev(char *errbuf);
This interface is obsoleted by
To find a default device on which to capture, call
and, if the list it returns is not empty, use the first device in the
list. (If the list is empty, there are no devices on which capture is
has been called, this interface always returns
returns a pointer to a string giving the name of a network device
suitable for use with
If there is an error,
has been called,
is returned and
is filled in with an appropriate error message.
is assumed to be able to hold at least
The pointer returned by
points to a static buffer; subsequent calls to
in the same thread, or calls to
in another thread, may overwrite that buffer.
In WinPcap and Npcap, this function may return a UTF-16 string rather
than an ASCII or UTF-8 string.
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