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.\"
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.\" Copyright (c) 1994, 1996, 1997
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.\" The Regents of the University of California. 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: (1) source code distributions
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.\" retain the above copyright notice and this paragraph in its entirety, (2)
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.\" distributions including binary code include the above copyright notice and
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.\" this paragraph in its entirety in the documentation or other materials
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.\" provided with the distribution, and (3) all advertising materials mentioning
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.\" features or use of this software display the following acknowledgement:
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.\" ``This product includes software developed by the University of California,
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.\" Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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.\" the University nor the names of its contributors may be used to endorse
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.\" or promote products derived from this software without specific prior
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.\" written permission.
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.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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.\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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.\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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.\"
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.TH PCAP_LIST_TSTAMP_TYPES 3PCAP "22 August 2018"
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.SH NAME
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pcap_list_tstamp_types, pcap_free_tstamp_types \- get a list of time
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stamp types supported by a capture device, and free that list
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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_list_tstamp_types(pcap_t *p, int **tstamp_typesp);
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void pcap_free_tstamp_types(int *tstamp_types);
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.ft
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.fi
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.SH DESCRIPTION
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.B pcap_list_tstamp_types()
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is used to get a list of the supported time stamp types of the interface
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associated with the pcap descriptor.
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.B pcap_list_tstamp_types()
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allocates an array to hold the list and sets
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.I *tstamp_typesp
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to point to the array.
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See
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.BR pcap-tstamp (@MAN_MISC_INFO@)
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for a list of all the time stamp types.
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.PP
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The caller is responsible for freeing the array with
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.BR pcap_free_tstamp_types() ,
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which frees the list pointed to by
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.IR tstamp_types .
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.SH RETURN VALUE
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.B pcap_list_tstamp_types()
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returns the number of time stamp types in the array on success and
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.B PCAP_ERROR
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on failure.
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A return value of one means that the only time stamp type supported is
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the one in the list, which is the capture device's default time stamp
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type. A return value of zero means that the only time stamp type
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supported is
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.BR PCAP_TSTAMP_HOST ,
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which is the capture device's default time stamp type (only older
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versions of libpcap will return that; newer versions will always return
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one or more types).
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If
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.B PCAP_ERROR
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is returned,
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.B pcap_geterr(3PCAP)
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or
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.B pcap_perror(3PCAP)
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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 the error text.
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.SH BACKWARD COMPATIBILITY
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.PP
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These functions became available in libpcap release 1.2.1. In previous
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releases, the time stamp type cannot be set; only the default time stamp
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type offered by a capture source is available.
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.SH SEE ALSO
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pcap(3PCAP), pcap_tstamp_type_val_to_name(3PCAP),
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pcap-tstamp(@MAN_MISC_INFO@)
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