batadv_mcas...e_check_ipv4(9)

📦 version 7.3.1, in nixpkgs unstable

💅 batadv_mcast_forw_mode_check_ipv4(9) — yes bestie, that's the whole name ✨

okay so this is a page from the Kernel API Manual and the function name is genuinely a whole paragraph, but we move 🫶. It's batadv_mcast_forw_mode_check_ipv4 — say it three times fast, I dare you 😭 — and tbh she's lowkey the vibe-check bouncer at the door of IPv4 multicast forwarding.

✨ NAME ✨

batadv_mcast_forw_mode_check_ipv4 — check for optimized forwarding potential 👑

Like fr, that's her whole job description: does this packet have potential? Could it be more than classic flooding? Is it that girl? 💅

🎀 SYNOPSIS 🎀

int batadv_mcast_forw_mode_check_ipv4 (struct batadv_priv *bat_priv ,
struct sk_buff *skb , bool *is_unsnoopable , int *is_routable );

not me reading this signature and needing a lil lie-down 🙈 but it's fine, it's iconic, we love her.

🦋 ARGUMENTS 🦋

  • bat_priv — the bat priv with all the mesh interface information 🌸 like, the entire mesh interface lore lives in here, no cap.
  • skb — the IPv4 packet to check ⭐ this is the actual main character of the function ngl.
  • is_unsnoopable — stores whether the destination is snoopable 👀 yes, an out-param, it's literally storing that fact for you.
  • is_routable — stores whether the destination is routable 🧚 same deal, it writes the answer here for later.

💖 DESCRIPTION 💖

So the whole point: she checks whether the given IPv4 packet has the potential to be forwarded with a mode more optimal than classic flooding ✨. That's it. That's the function. She's basically doing a vibe check on the packet — "bestie, could you travel in a cuter, more optimized way than just shouting to literally everyone?" 🔥

State it plainly: checks whether the given IPv4 packet has the potential to be forwarded with a mode more optimal than classic flooding. periodt. 💅

🌈 RETURN 🌈

  • 0 — if so 🎉 (yes, she has potential, slay)
  • -EINVAL — otherwise 😭
  • -ENOMEM — in case of memory allocation failure 💀 (allocation said "no <3")

🔥 SEE ALSO 🔥

okay so buckle up because this list is long — the kernel file is ./net/batman-adv/multicast.c and then, like, every single multicast function that has ever existed. keeping them all, character for character, because that's the rule and I'm a woman of my word 🫶:

like?? the whole friend group showed up 😭💖 but we love a supportive ensemble cast.

and that's the page!! sign-off time 🎀: this lil masterpiece lives in ./net/batman-adv, dated October 2026, and the page name in the footer is the same iconic mouthful — batadv_mcas...e_check_ipv4(9) (yes it's abbreviated in the footer, no I don't know why, yes I'm obsessed). go check your multicast potential bestie, ily, bye 🦋💜

📦 where this page comes from