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.TH PCAP_SET_DATALINK 3PCAP "25 July 2018"
.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 link-layer header type of the pcap descriptor
to the type specified by
.IR dlt .
.SH RETURN VALUE
.B pcap_set_datalink()
returns 0 on success and
.B PCAP_ERROR
on failure. 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 SEE ALSO
pcap(3PCAP), pcap_datalink_name_to_val(3PCAP)