batadv_handle_announce(9)

💅 batadv_handle_announce(9)

okay so bestie, welcome to the Kernel API Manual — this is the bridge-loop-avoidance corner of the batman-adv mesh universe and honestly it's kind of iconic ✨

This one function, batadv_handle_announce, does exactly one thing and does it with main character energy: it checks for an ANNOUNCE frame 💖 That's the whole vibe check. Nothing more, nothing less.

---

✨ SYNOPSIS ✨

bool batadv_handle_announce (struct batadv_priv *bat_priv , u8 *an_addr
, u8 *backbone_addr , unsigned short vid );

returns a bool, takes four args, slays, leaves 🎀

---

🫶 ARGUMENTS 🫶

• bat_priv — the bat priv 🦋 this is the one carrying all the mesh interface information, like the whole group chat's contact list ngl
• an_addr — the announcement mac address (aka the ARP Sender HW address) 💌 literally who sent it, on the MAC level
• backbone_addr — the originator address of the sender, which is the Ethernet source MAC 👑 so like, where it actually came from origin-wise
• vid — the VLAN ID of the frame 🌸 the lil tag that says which network this party is happening on

---

⭐ RETURN ⭐

• true — if handled 💅 that's it, that's the return value. true means handled, periodt.

---

🔥 SEE ALSO 🔥

okay so this list is LONG and every single one of these is a friend of the show, so let's go 👑

kernel file: ./net/batman-adv/bridge_loop_avoidance.c 📁

The full squad, no cap, in order:

• batadv_choose_claim(9)
• batadv_choose_backbone_gw(9)
• batadv_compare_backbone_gw(9)
• batadv_compare_claim(9)
• batadv_backbone_gw_release(9)
• batadv_backbone_gw_put(9)
• batadv_claim_release(9)
• batadv_claim_put(9)
• batadv_claim_hash_find(9)
• batadv_backbone_hash_find(9)
• batadv_bla_del_backbone_claims(9)
• batadv_bla_send_claim(9)
• batadv_bla_loopdetect_report(9)
• batadv_bla_get_backbone_gw(9)
• batadv_bla_update_own_backbone_gw(9)
• batadv_bla_answer_request(9)
• batadv_bla_send_request(9)
• batadv_bla_send_announce(9)
• batadv_bla_add_claim(9)
• batadv_bla_claim_get_backbone_gw(9)
• batadv_bla_del_claim(9)
• batadv_handle_request(9)
• batadv_handle_unclaim(9)
• batadv_handle_claim(9)
• batadv_check_claim_group(9)
• batadv_bla_process_claim(9)
• batadv_bla_purge_backbone_gw(9)
• batadv_bla_purge_claims(9)
• batadv_bla_update_orig_address(9)
• batadv_bla_send_loopdetect(9)
• batadv_bla_status_update(9)
• batadv_bla_periodic_work(9)
• batadv_bla_init(9)
• batadv_bla_check_duplist(9)
• batadv_bla_check_ucast_duplist(9)
• batadv_bla_check_bcast_duplist(9)
• batadv_bla_is_backbone_gw_orig(9)
• batadv_bla_is_backbone_gw(9)
• batadv_bla_free(9)
• batadv_bla_loopdetect_check(9)
• batadv_bla_rx(9)
• batadv_bla_tx(9)
• batadv_bla_claim_dump_entry(9)
• batadv_bla_claim_dump_bucket(9)
• batadv_bla_claim_dump(9)
• batadv_bla_backbone_dump_entry(9)
• batadv_bla_backbone_dump_bucket(9)
• batadv_bla_backbone_dump(9)
• batadv_bla_check_claim(9)

---

bestie note 🫶 this page lives under ./net/batman-adv, and it's dated October 2026 — so yeah, mark your calendars, the mesh lore is timestamped 💀

k byeeee, go check those ANNOUNCE frames 💜🧚‍♀️🌸