PCAP_DATALINK_VAL_TO_NAME(3PCAP) PCAP_DATALINK_VAL_TO_NAME(3PCAP)

NAME

pcap_datalink_val_to_name, pcap_datalink_val_to_description,
pcap_datalink_val_to_description_or_dlt - get a name or description
for a link-layer header type value

SYNOPSIS

#include <pcap.h>

const char *pcap_datalink_val_to_name(int dlt);
const char *pcap_datalink_val_to_description(int dlt);
const char *pcap_datalink_val_to_description_or_dlt(int dlt);

DESCRIPTION

pcap_datalink_val_to_name() translates a link-layer header type value
to the corresponding link-layer header type name, which is the DLT_
name for the link-layer header type value with the DLT_ removed.
NULL is returned if the type value does not correspond to a known
DLT_ value.

pcap_datalink_val_to_description() translates a link-layer header
type value to a short description of that link-layer header type.
NULL is returned if the type value does not correspond to a known
DLT_ value.

pcap_datalink_val_to_description_or_dlt() translates a link-layer
header type value to a short description of that link-layer header
type just like pcap_datalink_val_to_description(). If the type value
does not correspond to a known DLT_ value, the string "DLT n" is
returned, where n is the value of the dlt argument.

BACKWARD COMPATIBILITY

The pcap_datalink_val_to_description_or_dlt() function first became
available in libpcap release 1.9.1. In previous releases,
pcap_datalink_val_to_description() would have to be called and, if it
returned NULL, a default string would have to be constructed.

SEE ALSO

pcap(3PCAP)

4 May 2022 PCAP_DATALINK_VAL_TO_NAME(3PCAP)