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PCAP_SET_DATALINK

Section: Misc. Reference Manual Pages (3PCAP)
Updated: 5 March 2022
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NAME

pcap_set_datalink - set the lin-layer header type to be used by a capture device

SYNOPSIS

#include <pcap/pcap.h>

int pcap_set_datalink(pcap_t *p, int dlt);

DESCRIPTION

pcap_set_datalink() is used to set the current lin-layer header type of the pcap descriptor to the type specified by dlt.

RETURN VALUE

pcap_set_datalink() returns 0 on success, PCAP_ERROR_NOT_ACTIVATED if called on a capture handle that has been created but not activated, or PCAP_ERROR on other errors. If PCAP_ERROR is returned, pcap_geterr(3PCAP) or pcap_perror(3PCAP) may be called with p as an argument to fetch or display the error text.