pcap_lookupdev(3) pcap_lookupdev(3)
NAME
pcap_lookupdev - find the default device on which to capture
SYNOPSIS
#include <pcap/pcap.h>
char errbuf[PCAP_ERRBUF_SIZE];
pcap_lookupdev(3) *errbuf);
DESCRIPTION
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(3) returns a pointer to a string giving the name of a
network device suitable for use with pcap_create() and pcap_activate(),
or with pcap_open_live(), and with pcap_lookupnet(). 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.
SEE ALSO
pcap(3), pcap_create(3), pcap_activate(3),
pcap_open_live(3), pcap_lookupnet(3)
BUGS
The pointer returned by pcap_lookupdev(3) points to a static buffer;
subsequent calls to pcap_lookupdev(3) in the same thread, or calls to
pcap_lookupdev(3) 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)
libpcap 1.9.0 - Generated Sat Jul 28 16:14:26 CDT 2018