pcap_lookupdev(3) - NetBSD Manual Pages

Command:
Section:
Arch:
Collection:
>>>
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];

       [DEPRECATED] char *pcap_lookupdev(char *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() 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.


SEE ALSO

       pcap(3)


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(3)