pcap_datalink_val_to_name.3pcap - Man Page

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 1.10.0.  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)

Referenced By

The man pages pcap_datalink_val_to_description.3pcap(3) and pcap_datalink_val_to_description_or_dlt.3pcap(3) are aliases of pcap_datalink_val_to_name.3pcap(3).

15 April 2019