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PCAP_LOOKUPDEV 3PCAP "3 January 2014"
NAME
pcap_lookupdev - find the default device on which to capture
SYNOPSIS
#include <pcap/pcap.h>

char errbuf[PCAP_ERRBUF_SIZE];

char *pcap_lookupdev(char *errbuf);

DESCRIPTION
pcap_lookupdev() 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(3PCAP), pcap_create(3PCAP), pcap_activate(3PCAP), pcap_open_live(3PCAP), pcap_lookupnet(3PCAP)