PCAP_SET_DATALINK(3)

💖 PCAP_SET_DATALINK(3) 💖

okay bestie, welcome to the pcap_set_datalink page from the Library Functions Manual ✨ this one is lowkey short but highkey useful: it's all about setting the link-layer header type for a capture device. no cap 🫶

✨ NAME ✨

pcap_set_datalink — set the link-layer header type to be used by a capture device 💅

🌸 SYNOPSIS 🌸

#include <pcap/pcap.h>

int pcap_set_datalink(pcap_t *p, int dlt);

💅 DESCRIPTION 💅

so basically, pcap_set_datalink() is used to set the current link-layer header type of the pcap descriptor to the type specified by dlt 🦋

like, that's the whole vibe. p is your pcap descriptor, and dlt is the link-layer header type you want it to use. iconic, honestly 👑

🔥 RETURN VALUE 🔥

pcap_set_datalink() returns 0 on success, bestie 🎀

it returns PCAP_ERROR_NOT_ACTIVATED if you call it on a capture handle that has been created but not activated 😭

on other errors, it returns PCAP_ERROR 💀

and if PCAP_ERROR is returned, you may call pcap_geterr(3) or pcap_perror(3) with p as an argument to fetch or display the error text. very helpful, very demure 🙈

🌈 SEE ALSO 🌈

• pcap(3)
• pcap_datalink_name_to_val(3)

signed off from the Library Functions Manual, dated 5 March 2022, page PCAP_SET_DATALINK(3) — slay and goodbye, bestie 💌✨💖