.\"Copyright (c) 2013, Michal Sekletar

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.TH PCAP_SET_TSTAMP_PRECISION 3PCAP "5 February 2015"

.SH NAME

pcap_set_tstamp_precision \- set the time stamp precision returned in

captures

.SH SYNOPSIS

.nf

.ft B

#include <pcap/pcap.h>

.ft

.LP

.ft B

int pcap_set_tstamp_precision(pcap_t *p, int tstamp_precision);

.ft

.fi

.SH DESCRIPTION

.B pcap_set_tstamp_precision()

sets the precision of the time stamp desired for packets captured on the pcap

descriptor to the type specified by

.IR tstamp_precision .

It must be called on a pcap descriptor created by

.B pcap_create(3PCAP)

that has not yet been activated by

.BR pcap_activate(3PCAP) .

Two time stamp precisions are supported, microseconds and nanoseconds. One can

use options

.B PCAP_TSTAMP_PRECISION_MICRO and

.B PCAP_TSTAMP_PRECISION_NANO

to request desired precision. By default, time stamps are in microseconds.

.SH RETURN VALUE

.B pcap_set_tstamp_precision()

returns 0 on success if the specified time stamp precision is expected to be

supported by the capture device,

.B PCAP_ERROR_TSTAMP_PRECISION_NOTSUP

if the capture device does not support the requested time stamp

precision,

.B PCAP_ERROR_ACTIVATED

if called on a capture handle that has been activated.

.SH BACKWARD COMPATIBILITY

This function became available in libpcap release 1.5.1.  In previous

releases, time stamps from a capture device or savefile are always given

in seconds and microseconds.

.SH SEE ALSO

pcap(3PCAP),

pcap_get_tstamp_precision(3PCAP),

pcap-tstamp(@MAN_MISC_INFO@)