batadv_recv_mcast_packet(9)

📦 version 7.3.1, in nixpkgs unstable

💅 batadv_recv_mcast_packet(9) — the Kernel API Manual page, but make it make sense

okay so bestie, you've stumbled into the Kernel API Manual and the star of the show is batadv_recv_mcast_packet — it's the one that processes a received batman-adv multicast packet. that's literally the whole name. slay. 🌈

✨ NAME ✨

batadv_recv_mcast_packet — process received batman-adv multicast packet 🎀

no cap, that's it. it takes the multicast packet that just landed and does the processing thing. very main character of it.

🦋 SYNOPSIS 🦋

int batadv_recv_mcast_packet (struct sk_buff *skb , struct
batadv_hard_iface *recv_if );

look at that signature. gorgeous. she returns an int, she takes a struct sk_buff * and a struct batadv_hard_iface *. periodt. 💅

💖 ARGUMENTS 💖

  • skb — the received batman-adv multicast packet. yes, THE packet, the one we're here for. icon behavior.
  • recv_if — interface that the skb is received on. like, which hard interface this whole thing came in through. iykyk.

🌸 DESCRIPTION 🌸

okay so what actually happens: it parses the given, received batman-adv multicast packet. simple enough, right?

but then, depending on the contents of its TVLV, it forwards it and/or decapsulates it to hand it over to the mesh interface. so basically the TVLV is the vibe check — whatever's inside decides whether she forwards, whether she decapsulates, or both. 🧚 the "and/or" is doing so much work there and honestly? respect it.

⭐ RETURN ⭐

what you get back, bestie:

  • NET_RX_SUCCESS if the skb was locally received 🎉
  • NET_RX_DROP otherwise 💀
  • or a negative errno code when the multicast tracker TVLV could not be processed 😭

so like, three possible timelines. pick your fighter.

ngl, if you get a negative errno back it's specifically because the multicast tracker TVLV couldn't be processed — that's not a "packet was meh" situation, that's a real problem with the TVLV itself. don't conflate them.

👑 SEE ALSO 👑

bestie, this list is LONG and every single one of them is coming to the party. no skips. 🫶

Kernel file ./net/batman-adv/routing.c, and also:

like, go read them. or don't. i'm not your mom. 😌

🍓 the sign-off 🍓

this lil page lives at ./net/batman-adv, dated October 2026, and it's page batadv_recv_mcast_packet(9) of the Kernel API Manual. go forth and process those multicast packets, bestie. mwah. 💋✨

📦 where this page comes from