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.\" Copyright (c) 1994, 1996, 1997
.\" The Regents of the University of California. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that: (1) source code distributions
.\" retain the above copyright notice and this paragraph in its entirety, (2)
.\" distributions including binary code include the above copyright notice and
.\" this paragraph in its entirety in the documentation or other materials
.\" provided with the distribution, and (3) all advertising materials mentioning
.\" features or use of this software display the following acknowledgement:
.\" ``This product includes software developed by the University of California,
.\" Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
.\" the University nor the names of its contributors may be used to endorse
.\" or promote products derived from this software without specific prior
.\" written permission.
.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
.\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
.\"
.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)
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