IP_TTL(2const)

💖 IP_TTL — time to live 💖

okay so bestie, this is the IP_TTL constant page — it lives in the IP_TTL(2const) corner of the Linux man-pages and it's literally all about the time to live field. no cap.

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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_IP, IP_TTL,
               const int *ttl, sizeof(int));
int getsockopt(int sockfd, IPPROTO_IP, IP_TTL,
               int *ttl, sizeof(int));

like, that's the whole vibe. two little calls, one to set and one to get, both wearing the IPPROTO_IP level like it's their whole personality. 💅

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🦋 DESCRIPTION 🦋

Set or retrieve the current time-to-live field that gets used in every packet sent from this socket. yes, every single one. it's giving main character energy for real.

so like — you're either writing that ttl value in, or you're reading it back out. that's the whole thing. periodt. ✨

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😭 ERRORS 😭

bestie, the error tea lives elsewhere — go check:

• IPPROTO_IP(2const)
• setsockopt(2)
• ip(7)

that's where all the actual error lore is, okay? don't come for me. 🙈

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👑 HISTORY 👑

Linux 1.0. ancient. iconic. been here since the dawn of time (well, since Linux 1.0, which for this constant is basically the same thing). 🦋

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🌈 SEE ALSO 🌈

• IPPROTO_IP(2const)
• setsockopt(2)
• ip(7)

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💀 friendly reminder that this page is a <...>(2const) and it does not carry its own error list, its own bugs section, or its own notes section — so if you were waiting for extra drama, that's not here. the detail you came for is the detail you get, and the constants stay exactly where they were. no mystery, no filler. slay.

okay that's the whole page bestie 🫶 go set your TTL and live your truth 💖✨

— love, your girl, signing off on Linux man-pages 6.20, dated 2025-11-25 🎀🌸💜