NAME

       pcap_lookupdev - find the default device on which to capture

SYNOPSIS

       #include <pcap/pcap.h>

       char errbuf[PCAP_ERRBUF_SIZE];

       [DEPRECATED] char *pcap_lookupdev(char *errbuf);

DESCRIPTION

       This interface is obsoleted by pcap_findalldevs(3PCAP).  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(3PCAP)   and   pcap_activate(3PCAP),   or   with
       pcap_open_live(3PCAP), and with pcap_lookupnet(3PCAP).  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)

BUGS

       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(3PCAP)