PCAP_DATALINK_VAL_TO_NAME(3PCAP)

🦋 PCAP_DATALINK_VAL_TO_NAME — the 3PCAP manual page 🦋

okay so bestie, welcome to the PCAP_DATALINK_VAL_TO_NAME(3PCAP) page — yes, 3PCAP is the manual section, and this whole thing is about getting a name or description for a link-layer header type value. it’s giving “tiny functions, very useful” energy. 💅

✨ NAME ✨

pcap_datalink_val_to_name, pcap_datalink_val_to_description, and pcap_datalink_val_to_description_or_dlt — 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. that name is the DLT_ name for the link-layer header type value with the DLT_ removed. if the type value does not correspond to a known DLT_ value, NULL is returned. 😭
• pcap_datalink_val_to_description() — translates a link-layer header type value to a short description of that link-layer header type. if the type value does not correspond to a known DLT_ value, NULL is returned.
• 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(). but 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. no NULL jump-scare here, bestie. 🫶

🌈 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. lowkey a little手工 arts-and-crafts moment. ✂️💀

👑 SEE ALSO 👑

pcap(3PCAP) 🌟

mwah 💋 — source/version: PCAP_DATALINK_VAL_TO_NAME(3PCAP), date: 4 May 2022. periodt. 💖