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.TH PCAP_LOOKUPDEV 3PCAP "5 April 2008"
.SH NAME
pcap_lookupdev \- find the default device on which to capture
.SH SYNOPSIS
.nf
.ft B
#include <pcap/pcap.h>
.ft
.LP
.nf
.ft B
char errbuf[PCAP_ERRBUF_SIZE];
.ft
.LP
.ft B
char *pcap_lookupdev(char *errbuf);
.ft
.fi
.SH DESCRIPTION
.B pcap_lookupdev()
returns a pointer to a string giving the name of a network device
suitable for use with
.B pcap_create()
and
.BR pcap_activate() ,
or with
.BR pcap_open_live() ,
and with
.BR pcap_lookupnet() .
If there is an error,
.B NULL
is returned and
.I errbuf
is filled in with an appropriate error message.
.I errbuf
is assumed to be able to hold at least
.B PCAP_ERRBUF_SIZE
chars.
.SH SEE ALSO
pcap(3PCAP), pcap_create(3PCAP), pcap_activate(3PCAP),
pcap_open_live(3PCAP), pcap_lookupnet(3PCAP)