Manpages - pcap_set_tstamp_precision.3pcap

pcap_set_tstamp_precision - set the time stamp precision returned in captures

  #include <pcap/pcap.h>
  int pcap_set_tstamp_precision(pcap_t *p, int tstamp_precision);

pcap_set_tstamp_precision*() sets the precision of the time stamp desired for packets captured on the pcap descriptor to the type specified by tstamp_precision. It must be called on a pcap descriptor created by *pcap_create*(3PCAP) that has not yet been activated by *pcap_activate*(3PCAP). Two time stamp precisions are supported, microseconds and nanoseconds. One can use options *PCAP_TSTAMP_PRECISION_MICRO and PCAP_TSTAMP_PRECISION_NANO to request desired precision. By default, time stamps are in microseconds.

pcap_set_tstamp_precision*() returns *0 on success if the specified time stamp precision is expected to be supported by the capture device, PCAP_ERROR_TSTAMP_PRECISION_NOTSUP if the capture device does not support the requested time stamp precision, PCAP_ERROR_ACTIVATED if called on a capture handle that has been activated.

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.

*pcap*(3PCAP), *pcap_get_tstamp_precision*(3PCAP), *pcap-tstamp*(7)