icmp_global_allow(9)

icmp_global_allow 💖

okay so this is a page from the Kernel API Manual, bestie — manual name folded in right here near the top, as requested — and it's all about the icmp_global_allow(9) function. let's get into it 🫶

✨ NAME ✨

icmp_global_allow — Are we allowed to send one more ICMP message ?

🦋 SYNOPSIS 🦋

bool icmp_global_allow (struct net *net );

🌸 ARGUMENTS 🌸

• net — network namespace. that's the whole argument, icon 💅

🎀 DESCRIPTION 🎀

So this function uses a token bucket to limit our ICMP messages to ~sysctl_icmp_msgs_per_sec. rate limiting but make it kernel, no cap ✨

It returns false if we reached the limit and can not send another packet. so if it says false, that's a no, bestie — the packet does not get to go 😭

It works in tandem with icmp_global_consume. they're a duo, iykyk 🔥

⭐ SEE ALSO ⭐

• Kernel file ./net/ipv4/icmp.c

that's the whole vibe. signing off from ./net/ipv4, dated October 2026, page icmp_global_allow(9) 💖✨🎀🦋🌸💅🫶