IPV6_ADD_MEMBERSHIP(2const)

💖 IPV6_ADD_MEMBERSHIP — the bestie edition 💖

okay so bestie, you're holding IPV6_ADD_MEMBERSHIP(2const), aka the "hey friends, I'm joining the multicast party" page. Two constants, one job: getting you into a multicast group, and getting you tf out. let's go 🦋

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✨ NAME ✨

IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP — join or leave a multicast group 💅

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📚 LIBRARY 📚

Standard C library (libc, -lc) 🎀

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🌸 SYNOPSIS 🌸

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

int setsockopt(int sockfd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
               const struct ipv6_mreq *val, sizeof(struct ipv6_mreq));
int setsockopt(int sockfd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP,
               const struct ipv6_mreq *val, sizeof(struct ipv6_mreq));

like, both of them are literally the same setsockopt(2) call, the only glow-up is which constant you pass in. IPV6_ADD_MEMBERSHIP = you're in. IPV6_DROP_MEMBERSHIP = you're out, no hard feelings 😌

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🫶 DESCRIPTION 🫶

Join or leave a multicast group. that's it, that's the vibe ✨

See IP_ADD_MULTICAST(2const) and IP_DROP_MULTICAST(2const). 👑

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😭 ERRORS 😭

See IPPROTO_IPV6(2const). See setsockopt(2). See ipv6(7). (yes bestie, all three, go read them, they're giving main character energy 🔥)

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👀 SEE ALSO 👀

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

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no cap, every single flag, constant and cross-reference above is exactly where it was — I just gave it a lil lip gloss 💄

okay byeeee, go join your multicast group, you're gonna slay 🧚‍♀️✨

this was Linux man-pages 6.20, dated 2025-12-02, and it's literally the IPV6_ADD_MEMBERSHIP(2const) page — periodt 💅💖