Manpages - pcap_datalink_val_to_name.3pcap

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 1.10.0. 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.

*pcap*(3PCAP)