batadv_recv...ttl_exceeded(9)

📦 version 7.3.1, in nixpkgs unstable

💅 batadv_recv...ttl_exceeded(9) — like, the Kernel API Manual page, bestie ✨

okay so you found the Kernel API Manual page for batadv_recv...ttl_exceeded(9) and honestly? iconic of you. sit down, grab a strawberry 🍓, and let's get into it.

🎀 NAME 🎀

batadv_recv_icmp_ttl_exceeded — handles an ICMP packet that literally hit TTL 0 😭 (yes, it expired, rip)

🦋 SYNOPSIS 🦋

int batadv_recv_icmp_ttl_exceeded (struct batadv_priv *bat_priv , struct
       sk_buff *skb );

that's the whole signature, no cap. it takes two things and gives you back an int.

🌸 ARGUMENTS 🌸

  • bat_priv — the bat priv that's holding all the mesh interface information, she's the main character here 👑
  • skb — the ICMP packet whose TTL has expired 💀 (gone, but not forgotten)

✨ DESCRIPTION ✨

so here's the vibe: for traceroute-style ICMP echo requests, this function sends a TTL exceeded reply right back to the source. it's giving "you tried, here's your receipt" 🫶

other ICMP types? simply dropped. not today. 🙈

🔥 RETURN 🔥

  • NET_RX_SUCCESS — if the reply was queued, slay 💅
  • NET_RX_DROP — otherwise, it's a no from me

👑 SEE ALSO 👑

highkey the whole friend group, fr fr:

Kernel file ./net/batman-adv/routing.c

ok that's the whole page bestie, go read the source now, iykyk 🧚‍♀️

mwah 💜 — this cutie came from ./net/batman-adv, dated October 2026, and she's filed under batadv_recv...ttl_exceeded(9). periodt. 🌈

📦 where this page comes from