pcap_datalink_val_to_name3pcap

Usage

#include <pcap.h>

Overview

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. A null pointer 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. A null pointer 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 a null pointer, a default string would have to be constructed.