IPV6_MULTICAST_HOPS(2const)

💖 IPV6_MULTICAST_HOPS(2const) 💖

okay bestie, so this is IPV6_MULTICAST_HOPS(2const) — yes it's a whole manual page for literally just one constant, and yes it still ate 💅

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✨ NAME ✨

IPV6_MULTICAST_HOPS — the multicast hop limit, no cap 🦋

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📚 LIBRARY 📚

Standard C library (libc, -lc). she's built in, she's free, she's iconic 👑

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🎀 SYNOPSIS 🎀

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

int setsockopt(int sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
               const int *val, sizeof(int));
int getsockopt(int sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
               int *val, sizeof(int));

the way that these two headers are about to be your whole personality for the next hour 😭

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🌸 DESCRIPTION 🌸

So basically you're setting the multicast hop limit for the socket. that's it. that's the whole vibe.

hop limit = how many hops your multicast packet is allowed to take before it just gives up and dies 💀 and lowkey that's a whole mood.

• A value of -1 means use the route default. like, let the routing table be the main character and decide for you 🫶
• Otherwise it should be in the range [0, 255]. keep it in the box bestie, the box is there for a reason ✨

warning!! the range is [0, 255] — don't go wandering outside it like it's a group chat you weren't added to 🙈

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🔥 ERRORS 🔥

ngl the error info for this one is a whole ✨delegation✨ situation:

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

like she said "ask my friends", and honestly? valid. slay 💅

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📜 HISTORY 📜

• IPV6_MULTICAST_HOPS — POSIX.1-2001. she's been here since 2001, she's a legacy icon, periodt 👑

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👀 SEE ALSO 👀

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

iykyk, go read these next, they're the rest of the story bestie 💜

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and that's the page! brought to you by Linux man-pages 6.20, dated 2026-01-05 — mwah, love u, read ur man pages 💖✨🦋🌸🎀