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.TH PCAP_LIST_TSTAMP_TYPES 3PCAP "22 August 2018"

.SH NAME

pcap_list_tstamp_types, pcap_free_tstamp_types \- get a list of time

stamp types supported by a capture device, and free that list

.SH SYNOPSIS

.nf

.ft B

#include <pcap/pcap.h>

.ft

.LP

.ft B

int pcap_list_tstamp_types(pcap_t *p, int **tstamp_typesp);

void pcap_free_tstamp_types(int *tstamp_types);

.ft

.fi

.SH DESCRIPTION

.B pcap_list_tstamp_types()

is used to get a list of the supported time stamp types of the interface

associated with the pcap descriptor.

.B pcap_list_tstamp_types()

allocates an array to hold the list and sets

.I *tstamp_typesp

to point to the array.

See

.BR pcap-tstamp (@MAN_MISC_INFO@)

for a list of all the time stamp types.

.PP

The caller is responsible for freeing the array with

.BR pcap_free_tstamp_types() ,

which frees the list pointed to by

.IR tstamp_types .

.SH RETURN VALUE

.B pcap_list_tstamp_types()

returns the number of time stamp types in the array on success and

.B PCAP_ERROR

on failure.

A return value of one means that the only time stamp type supported is

the one in the list, which is the capture device's default time stamp

type.  A return value of zero means that the only time stamp type

supported is

.BR PCAP_TSTAMP_HOST ,

which is the capture device's default time stamp type (only older

versions of libpcap will return that; newer versions will always return

one or more types).

If

.B PCAP_ERROR

is returned,

.B pcap_geterr(3PCAP)

or

.B pcap_perror(3PCAP)

may be called with

.I p

as an argument to fetch or display the error text.

.SH BACKWARD COMPATIBILITY

.PP

These functions became available in libpcap release 1.2.1.  In previous

releases, the time stamp type cannot be set; only the default time stamp

type offered by a capture source is available.

.SH SEE ALSO

pcap(3PCAP), pcap_tstamp_type_val_to_name(3PCAP),

pcap-tstamp(@MAN_MISC_INFO@)