batadv_mcast_forw_push_dest(9)

📦 version 7.3.1, in nixpkgs unstable

💅 batadv_mcast_forw_push_dest(9) — the Kernel API Manual, bestie edition

okay so bestie, this is batadv_mcast_forw_push_dest — it lives in the Kernel API Manual, and the whole entire job of this function is literally just pushing an originator MAC address onto an skb. that's it. that's the gig. 🎀

✨ SYNOPSIS ✨

bool batadv_mcast_forw_push_dest (struct batadv_priv *bat_priv , struct
       sk_buff *skb , unsigned short vid , struct batadv_orig_node *orig_node ,
       unsigned short *num_dests , unsigned short *tvlv_len );

it returns a bool, so you already know it's about to be a yes-or-no situation. 💖

🫶 ARGUMENTS 🫶

  • bat_priv — the bat priv with all the mesh interface information. it's giving "holder of all the mesh lore". 👑
  • skb — the skb you're pushing the destination address onto. the main character of this operation, ngl.
  • vid — the vlan identifier. yes, it's short. yes, it's iconic.
  • orig_node — the originator node you're getting the MAC address from. we're borrowing, bestie, not stealing.
  • num_dests — a pointer to store the number of pushed addresses in. it's a pointer, so it's storing something, not just vibing. 🦋
  • tvlv_len — stores the amount of currently pushed TVLV bytes. gotta keep that byte count cute and accurate. 📏

🌸 DESCRIPTION 🌸

here's the vibe check. if the orig_node is a BLA backbone gateway, or if there's not enough skb headroom available, or if num_dests is already at its maximum (that's 65535, no cap), then neither the skb nor num_dests is changed. nothing happens. zero movement. we respect the boundary. 🙈

otherwise? the originator's MAC address gets pushed onto the given skb and num_dests gets incremented by one. slay. ✨

fr fr remember: all three of those conditions are "hands off the skb" territory — the function literally changes nothing in those cases. 💀

🔥 RETURN 🔥

  • returns true if the orig_node is a backbone gateway or if an orig address was pushed successfully 🎉
  • returns false otherwise 💅

🌈 SEE ALSO 🌈

the kernel file in question:

  • ./net/batman-adv/multicast_forw.c

and the whole entire friend group (they all showed up, nobody cancelled):

and that's the whole page, bestie!! 💖✨🎀 this one shipped straight out of ./net/batman-adv with an October 2026 date stamp — so like, go forth and push those destination addresses responsibly. mwah. 🫶🦋🌸

📦 where this page comes from