2009-03-21 20:43:56 +00:00
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2015-01-06 18:58:31 +00:00
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.TH PCAP_ACTIVATE 3PCAP "21 September 2010"
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2009-03-21 20:43:56 +00:00
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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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2012-01-31 17:22:07 +00:00
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.B PCAP_WARNING_TSTAMP_TYPE_NOTSUP
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on success if the time stamp type specified in a previous
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.B pcap_set_tstamp_type()
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call isn't supported by the capture source (the time stamp type is
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left as the default),
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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_PROMISC_PERM_DENIED
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if the process has permission to open the capture source but doesn't
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have permission to put it into promiscuous mode,
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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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