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.\" @(#) $Header: /tcpdump/master/libpcap/pcap_set_datalink.3pcap,v 1.2 2008-04-05 20:26:56 guy Exp $
.\"
.\" Copyright (c) 1994, 1996, 1997
.\" The Regents of the University of California. All rights reserved.
.\"
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.\" retain the above copyright notice and this paragraph in its entirety, (2)
.\" distributions including binary code include the above copyright notice and
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.\" features or use of this software display the following acknowledgement:
.\" ``This product includes software developed by the University of California,
.\" Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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.\"
.TH PCAP_SET_DATALINK 3PCAP "4 April 2008"
.SH NAME
pcap_set_datalink \- set the link-layer header type to be used by a
capture device
.SH SYNOPSIS
.nf
.ft B
#include <pcap/pcap.h>
.ft
.LP
.ft B
int pcap_set_datalink(pcap_t *p, int dlt);
.ft
.fi
.SH DESCRIPTION
.B pcap_set_datalink()
is used to set the current data link type of the pcap descriptor
to the type specified by
.IR dlt .
.SH RETURN VALUE
.B pcap_set_datalink()
returns 0 on success and \-1 on failure.
If \-1 is returned,
.B pcap_geterr()
or
.B pcap_perror()
may be called with
.I p
as an argument to fetch or display the error text.
.SH SEE ALSO
pcap_geterr(3PCAP)
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