socket_mcjoin4(3)

💖 socket_mcjoin4 — the manual page, but make it a group chat 💖

okay bestie, sit down, hydrate, because today we're learning how to slide into a multicast group like it's a Discord server and you just got the invite link. this page lives in the Library Functions Manual, section 3, and its whole name is socket_mcjoin4(3) 🎀

✨ NAME ✨

socket_mcjoin4 — join a multicast group 🫶

like. that's it. that's the job. it joins. you're in the group. slay.

🌸 SYNTAX 🌸

first things first, you gotta bring the header along or nothing works:

#include <libowfat/socket.h>

and here's the actual function signature, verbatim, no cap:

int socket_mcjoin4(int s,const char groupip[4],const char interface[4]);

💅 DESCRIPTION 💅

okay so socket_mcjoin4 joins the IPv4 multicast group groupip on interface. that's the whole vibe. you hand it a socket, you hand it the group's IP, you hand it which interface you're rolling up on, and boom — you're in the group chat. iconic behavior fr fr.

and if something goes wrong? it does not sugarcoat it. socket_mcjoin4 returns -1, and it sets errno appropriately so you can go read exactly what went sideways. very "we need to talk" of it. 😭

ngl, always check that return value. -1 means the join did NOT happen, and errno is holding the receipts.

🦋 SEE ALSO 🦋

• socket_mcleave4(3) — for when you gotta leave the group (no hard feelings 🥲)
• socket_mcjoin6(3) — same energy, but IPv6 ✨
• socket_getifidx(3) — to figure out which interface index you even want

and that's the whole page, bestie!! it comes to you from the Library Functions Manual and it's filed under socket_mcjoin4(3) — that's the source, the version, the whole entire vibe. now go join that multicast group. you got this. periodt 💜🌈👑