csu3_am335x/EVSE/GPL/libpcap-1.9.0/pcap_set_datalink.3pcap

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.TH PCAP_SET_DATALINK 3PCAP "3 January 2014"
.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 \-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(3PCAP), pcap_geterr(3PCAP),
pcap_datalink_name_to_val(3PCAP)