- NetBSD Manual Pages
Powered by man-cgi (2021-06-01).
Maintained for NetBSD
by Kimmo Suominen.
Based on man-cgi by Panagiotis Christias.
pcap_lookupdev - find the default device on which to capture
[DEPRECATED] char *pcap_lookupdev(char *errbuf);
This interface is obsoleted by pcap_findalldevs(3). To find a default
device on which to capture, call pcap_findalldevs() 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 possible.)
pcap_lookupdev() returns a pointer to a string giving the name of a
network device suitable for use with pcap_create(3) and
pcap_activate(3), or with pcap_open_live(3), and with pcap_lookup-
net(3). If there is an error, NULL is returned and errbuf is filled in
with an appropriate error message. errbuf is assumed to be able to
hold at least PCAP_ERRBUF_SIZE chars.
The pointer returned by pcap_lookupdev() points to a static buffer;
subsequent calls to pcap_lookupdev() in the same thread, or calls to
pcap_lookupdev() in another thread, may overwrite that buffer.
In WinPcap, this function may return a UTF-16 string rather than an
ASCII or UTF-8 string.
8 September 2017 PCAP_LOOKUPDEV(3)