IPV6_MULTICAST_LOOP(2const)

✨ IPV6_MULTICAST_LOOP ✨

okay bestie, pull up a chair, we're doing a 2const page today 💅 it's a constant from the IPV6_MULTICAST_LOOP(2const) manual, and honestly? it's a tiny page with big main character energy.

💖 NAME 💖

IPV6_MULTICAST_LOOP — loop back sent multicast packets to local sockets 🦋

📚 LIBRARY 📚

Standard C library (libc, -lc) — the usual girlie, she's always there for you 🫶

🌸 SYNOPSIS 🌸

#include <netinet/in.h>  /* Definition of IP* constants */
#include <sys/socket.h>

int setsockopt(int sockfd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
               const int *enable, sizeof(int));
int getsockopt(int sockfd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
               int *enabled, sizeof(int));

like yes, that's the whole vibe check ✨ you're either setting it or getting it, no in-between.

🔥 DESCRIPTION 🔥

So the way this works is: it controls whether the socket sees multicast packets that it has sent itself. 🎀

That's it. That's the tea. it's giving "do I wanna hear my own echo or not" and you get to decide. no cap. 🧚

💀 ERRORS 💀

bestie, the error lore lives elsewhere, so go read these:

• See IPPROTO_IPV6(2const).
• See setsockopt(2).
• See ipv6(7).

👑 HISTORY 👑

• IPV6_MULTICAST_LOOP — POSIX.1-2001. a whole legend, been around forever, lowkey iconic 💜

🌈 SEE ALSO 🌈

• IP_MULTICAST_LOOP(2const)
• IPPROTO_IPV6(2const)
• setsockopt(2)
• ipv6(7)

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and that's the page, periodt 💅 this was Linux man-pages 6.20, dated 2026-01-05 — shoutout to the man-pages girlies for keeping the lore documented, we owe them everything 🎀✨