90 lines
2.9 KiB
Plaintext
90 lines
2.9 KiB
Plaintext
.\" @(#) $Header: /tcpdump/master/libpcap/pcap_activate.3pcap,v 1.1.2.5 2008-07-01 08:04:03 guy Exp $
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.\"
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.\" 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_ACTIVATE 3PCAP "5 April 2008"
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.SH NAME
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pcap_activate \- activate a 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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.ft
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.LP
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.ft B
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int pcap_activate(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_activate()
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is used to activate a packet capture handle to look
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at packets on the network, with the options that were set on the handle
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being in effect.
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.SH RETURN VALUE
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.B pcap_activate()
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returns 0 on success without warnings,
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.B PCAP_WARNING_PROMISC_NOTSUP
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on success on a device that doesn't support promiscuous mode if
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promiscuous mode was requested,
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.B PCAP_WARNING
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on success with any other warning,
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.B PCAP_ERROR_ACTIVATED
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if the handle has already been activated,
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.B PCAP_ERROR_NO_SUCH_DEVICE
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if the capture source specified when the handle was created doesn't
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exist,
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.B PCAP_ERROR_PERM_DENIED
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if the process doesn't have permission to open the capture source,
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.B PCAP_ERROR_RFMON_NOTSUP
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if monitor mode was specified but the capture source doesn't support
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monitor mode,
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.B PCAP_ERROR_IFACE_NOT_UP
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if the capture source is not up, and
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.B PCAP_ERROR
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if another error occurred.
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If
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.B PCAP_WARNING
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or
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.B PCAP_ERROR
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is returned,
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.B pcap_geterr()
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or
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.B pcap_perror()
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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 warning or
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error.
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If
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.BR PCAP_WARNING_PROMISC_NOTSUP ,
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.BR PCAP_ERROR_NO_SUCH_DEVICE ,
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or
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.B PCAP_ERROR_PERM_DENIED
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is returned,
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.B pcap_geterr()
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or
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.B pcap_perror()
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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 an message giving additional details
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about the problem that might be useful for debugging the problem if it's
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unexpected.
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.SH SEE ALSO
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pcap(3PCAP)
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