SCTP_GETASSOCID(3)

📦 version 15.1, in freebsd 14.5, freebsd 15.1

💅 sctp_getassocid(3) — bestie edition

okay so this one lives in the Library Functions Manual, section 3, and it's about getting an association id back from a socket address. yes it's niche. yes it's iconic. let's go 🫶

✨ NAME ✨

sctp_getassocid — bestie, this returns an association id for a specified socket address 💫

📚 LIBRARY 📚

Standard C Library (libc, -lc) — the classic, the moment, the blueprint 🎀

🌸 SYNOPSIS 🌸

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/sctp.h>

sctp_assoc_t
sctp_getassocid(int s, struct sockaddr *addr);

three includes, one function call, zero drama (well, mostly) 🦋

💖 DESCRIPTION 💖

okay so the way that sctp_getassocid() works is: it attempts to look up the socket address you handed it in addr, and then finds the respective association identification for it. that's the whole vibe. it's giving "matchmaker but for sockets" 💅

you give it a socket (s) and an address (addr), and it goes looking for the association that belongs to that address. literally that simple, no cap ✨

🔥 RETURN VALUES 🔥

the call returns the association id upon success 🎉 and 0 is returned upon failure 😭 (yes, 0 is the fail state here — keep that in mind, it's important, don't let it catch you slipping).

💀 ERRORS 💀

the sctp_getassocid() function can return the following errors — read these, they're your besties when stuff goes sideways:

  • [ENOENT] — The address does not have an association setup to it. bestie there is literally nothing there, the address is standing alone in the group chat with no association 🥲
  • [EBADF] — The argument s is not a valid descriptor. your file descriptor said "who? never met her" 🙈
  • [ENOTSOCK] — The argument s is not a socket. the thing you passed is not a socket, and honestly? vibe check failed 💀

👀 SEE ALSO 👀

  • sctp(4) — go read the big SCTP page, it's the main character energy of this whole saga 👑

okay that's the whole page, mwah 💋 this one's from Debian, dated December 15, 2006 — vintage, lowkey a classic, fr fr 🎀✨💜

📦 where this page comes from