Copyright (c) 1994, 1996, 1997
The Regents of the University of California. All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that: (1) source code distributions
retain the above copyright notice and this paragraph in its entirety, (2)
distributions including binary code include the above copyright notice and
this paragraph in its entirety in the documentation or other materials
provided with the distribution, and (3) all advertising materials mentioning
features or use of this software display the following acknowledgement:
``This product includes software developed by the University of California,
Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
the University nor the names of its contributors may be used to endorse
or promote products derived from this software without specific prior
written permission.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

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

#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);

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.

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. pcap (3PCAP)