73 lines
2.6 KiB
Plaintext
73 lines
2.6 KiB
Plaintext
.\" Copyright (c) 1994, 1996, 1997
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that: (1) source code distributions
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.\" retain the above copyright notice and this paragraph in its entirety, (2)
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.\" distributions including binary code include the above copyright notice and
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.\" this paragraph in its entirety in the documentation or other materials
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.\" provided with the distribution, and (3) all advertising materials mentioning
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.\" features or use of this software display the following acknowledgement:
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.\" ``This product includes software developed by the University of California,
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.\" Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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.\" the University nor the names of its contributors may be used to endorse
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.\" or promote products derived from this software without specific prior
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.\" written permission.
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.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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.\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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.\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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.\"
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.TH PCAP_CAN_SET_RFMON 3PCAP "31 July 2016"
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.SH NAME
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pcap_can_set_rfmon \- check whether monitor mode can be set for a
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not-yet-activated capture handle
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.SH SYNOPSIS
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.nf
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.ft B
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#include <pcap/pcap.h>
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.LP
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.ft B
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int pcap_can_set_rfmon(pcap_t *p);
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.ft
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.fi
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.SH DESCRIPTION
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.B pcap_can_set_rfmon()
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checks whether monitor mode could be set on a capture handle when
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the handle is activated.
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.SH RETURN VALUE
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.B pcap_can_set_rfmon()
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returns 0 if monitor mode could not be set,
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1 if monitor mode could be set, and a negative value on error.
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A negative return value indicates what error condition occurred.
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The possible error values are:
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.TP
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.B PCAP_ERROR_NO_SUCH_DEVICE
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The capture source specified when the handle was created doesn't
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exist.
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.TP
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.B PCAP_ERROR_PERM_DENIED
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The process doesn't have permission to check whether monitor mode
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could be supported.
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.TP
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.B PCAP_ERROR_ACTIVATED
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The capture handle has already been activated.
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.TP
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.B PCAP_ERROR
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Another error occurred.
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.B pcap_geterr(3PCAP)
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or
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.B \%pcap_perror(3PCAP)
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may be called with
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.I p
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as an argument to fetch or display a message describing the error.
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.LP
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Additional error codes may be added in the future; a program should
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check for 0, 1, and negative, return codes, and treat all negative
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return codes as errors.
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.B pcap_statustostr(3PCAP)
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can be called, with a warning or error code as an argument, to fetch a
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message describing the warning or error code.
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.SH SEE ALSO
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pcap(3PCAP), pcap_create(3PCAP), pcap_activate(3PCAP),
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pcap_set_rfmon(3PCAP)
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