Manpage of PCAP_LOOKUPDEV
Section: Misc. Reference Manual Pages (3PCAP)
Updated: 8 September 2017
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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.
This document was created by
man2html,
using the manual pages from "The Tcpdump Group" git repositories.
Time: 09:49:42 GMT, July 19, 2018