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.TH PCAP_CAN_SET_RFMON 3PCAP "18 May 2010"
.SH NAME
pcap_can_set_rfmon \- check whether monitor mode can be set for a
not-yet-activated capture handle
.SH SYNOPSIS
.nf
.ft B
#include <pcap/pcap.h>
.LP
.ft B
int pcap_can_set_rfmon(pcap_t *p);
.ft
.fi
.SH DESCRIPTION
.B pcap_can_set_rfmon()
checks whether monitor mode could be set on a capture handle when
the handle is activated.
.SH RETURN VALUE
.B pcap_can_set_rfmon()
returns 0 if monitor mode could not be set,
1 if monitor mode could be set,
.B PCAP_ERROR_NO_SUCH_DEVICE
if the capture source specified when the handle was created doesn't
exist,
.B PCAP_ERROR_PERM_DENIED
if the process doesn't have permission to check whether monitor mode
could be supported,
.B PCAP_ERROR_ACTIVATED
if called on a capture handle that has been activated, or
.B PCAP_ERROR
if an error occurred.
If
.B PCAP_ERROR
is returned,
.B pcap_geterr()
or
.B pcap_perror()
may be called with
.I p
as an argument to fetch or display the error text.
.SH SEE ALSO
pcap(3PCAP), pcap_create(3PCAP), pcap_activate(3PCAP),
pcap_set_rfmon(3PCAP)