pcap_lookupdev3
Find the default device on which to capture
Usage
#include <pcap/pcap.h>
char errbuf[PCAP_ERRBUF_SIZE];
[DEPRECATED] char *pcap_lookupdev(char *errbuf);
Overview
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.) errbuf is a buffer large enough to hold at least PCAP_ERRBUF_SIZE chars.
If pcap_init(3) has been called, this interface always returns NULL.
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_lookupnet(3). If there is an error, or if pcap_init(3) has been called, NULL is returned and errbuf is filled in with an appropriate error message.
Releases
39 releases since FreeBSD 8.0-RELEASE; the text changed 10 times.