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69 lines
2.4 KiB
69 lines
2.4 KiB
4 months ago
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.\"Copyright (c) 2013, Michal Sekletar
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.\"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 the following conditions
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.\"are met:
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.\"
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in
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.\" the documentation and/or other materials provided with the
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.\" distribution.
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.\" 3. The names of the authors may not be used to endorse or promote
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.\" products derived from this software without specific prior
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.\" written permission.
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.\"
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.\"THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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.\"IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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.\"WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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.TH PCAP_SET_TSTAMP_PRECISION 3PCAP "23 August 2018"
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.SH NAME
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pcap_set_tstamp_precision \- set the time stamp precision returned in
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captures
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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_set_tstamp_precision(pcap_t *p, int tstamp_precision);
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.ft
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.fi
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.SH DESCRIPTION
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.BR pcap_set_tstamp_precision ()
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sets the precision of the time stamp desired for packets captured on the pcap
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descriptor to the type specified by
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.IR tstamp_precision .
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It must be called on a pcap descriptor created by
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.BR pcap_create (3PCAP)
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that has not yet been activated by
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.BR pcap_activate (3PCAP).
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Two time stamp precisions are supported, microseconds and nanoseconds. One can
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use options
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.B PCAP_TSTAMP_PRECISION_MICRO and
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.B PCAP_TSTAMP_PRECISION_NANO
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to request desired precision. By default, time stamps are in microseconds.
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.SH RETURN VALUE
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.BR pcap_set_tstamp_precision ()
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returns
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.B 0
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on success if the specified time stamp precision is expected to be
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supported by the capture device,
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.B PCAP_ERROR_TSTAMP_PRECISION_NOTSUP
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if the capture device does not support the requested time stamp
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precision,
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.B PCAP_ERROR_ACTIVATED
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if called on a capture handle that has been activated.
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.SH BACKWARD COMPATIBILITY
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This function became available in libpcap release 1.5.1. In previous
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releases, time stamps from a capture device or savefile are always given
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in seconds and microseconds.
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.SH SEE ALSO
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.BR pcap (3PCAP),
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.BR pcap_get_tstamp_precision (3PCAP),
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.BR pcap-tstamp (@MAN_MISC_INFO@)
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