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| .TH PCAP_DATALINK_VAL_TO_NAME 3PCAP "4 May 2022" |
| .SH NAME |
| 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 |
| .SH SYNOPSIS |
| .nf |
| .ft B |
| #include <pcap.h> |
| .ft |
| .LP |
| .ft B |
| 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); |
| .ft |
| .fi |
| .SH DESCRIPTION |
| .BR pcap_datalink_val_to_name () |
| translates a link-layer header type value to the corresponding |
| link-layer header type name, which is the |
| .B DLT_ |
| name for the link-layer header type value with the |
| .B DLT_ |
| removed. |
| .B NULL |
| is returned if the type value does not correspond to a known |
| .B DLT_ |
| value. |
| .PP |
| .BR pcap_datalink_val_to_description () |
| translates a link-layer header type value to a short description of that |
| link-layer header type. |
| .B NULL |
| is returned if the type value does not correspond to a known |
| .B DLT_ |
| value. |
| .PP |
| .BR 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 |
| .BR pcap_datalink_val_to_description (). |
| If the type value does not correspond to a known |
| .B DLT_ |
| value, the string "DLT n" is returned, where n is the value of |
| the dlt argument. |
| .SH BACKWARD COMPATIBILITY |
| The |
| .BR pcap_datalink_val_to_description_or_dlt () |
| function first became available in libpcap release 1.9.1. In previous |
| releases, |
| .BR pcap_datalink_val_to_description () |
| would have to be called and, if it returned |
| .BR NULL , |
| a default string would have to be constructed. |
| .SH SEE ALSO |
| .BR pcap (3PCAP) |
