Linux cli command pcap_datalink_val_to_description_or_dltpcap

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NAME 🖥️ pcap_datalink_val_to_description_or_dltpcap 🖥️

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)

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