STRUCT BATADV_MCAST_QUERIER_STATE(9)

✨ struct batadv_mcast_querier_state(9) ✨ — the Kernel API Manual, bestie edition

okay so. bestie. sit down, grab a strawberry 🍓, because we're about to talk about a bitfield and honestly? she's tiny but she's doing SO much. this is struct batadv_mcast_querier_state from the Kernel API Manual, section 9, and she is literally the entire IGMP/MLD querier vibe when your mesh is bridged. no cap. 💅

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🌸 NAME 🌸

struct batadv_mcast_querier_state — IGMP/MLD querier state when bridged 🫶

like. the whole point. querier state. when bridged. she said what she said and she ate. 🔥

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🦋 SYNOPSIS 🦋

look at her. two bits. TWO. absolute minimalist queen 👑

struct batadv_mcast_querier_state {
    unsigned char exists:1;
    unsigned char shadowing:1;
 };

the way that this is literally just two single-bit flags and yet she's carrying the whole querier situation on her back 😭 iconic behavior.

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💜 Members 💜

okay so the members. there's two. that's it. that's the whole squad.

• exists — whether a querier exists in the mesh ✨ genuinely just "is there one or not", she's not being cryptic about it.
• shadowing — if a querier exists, whether it is potentially shadowing multicast listeners (i.e. querier is behind our own bridge segment) 🙈 note the "if a querier exists" part!! this one is conditional on exists, so if exists is 0 then like... don't come for her about shadowing, ok? the potentially is doing a lot of heavy lifting in there too — it's a maybe, not a promise. and yes "behind our own bridge segment" is the real actual definition, ngl that's the part you should screenshot 📸

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🧚 SEE ALSO 🧚

the girlies she hangs out with (all of them, fr fr, no skipping):

Kernel file ./net/batman-adv/types.h

• batadv_dat_addr_t(9)
• enum batadv_dhcp_recipient(9)
• BATADV_TT_REMOTE_MASK(9)
• BATADV_TT_SYNC_MASK(9)
• struct batadv_ogm_buf(9)
• struct batadv_hard_iface_bat_iv(9)
• enum batadv_v_hard_iface_flags(9)
• struct batadv_hard_iface_bat_v(9)
• enum batadv_hard_iface_wifi_flags(9)
• struct batadv_wifi_net_device_state(9)
• struct batadv_hard_iface(9)
• struct batadv_orig_ifinfo_bat_iv(9)
• struct batadv_orig_ifinfo(9)
• struct batadv_frag_table_entry(9)
• struct batadv_frag_list_entry(9)
• struct batadv_vlan_tt(9)
• struct batadv_orig_node_vlan(9)
• struct batadv_orig_bat_iv(9)
• struct batadv_orig_node(9)
• enum batadv_orig_capabilities(9)
• struct batadv_gw_node(9)
• struct batadv_hardif_neigh_node_bat_v(9)
• struct batadv_hardif_neigh_node(9)
• struct batadv_neigh_node(9)
• struct batadv_neigh_ifinfo_bat_iv(9)
• struct batadv_neigh_ifinfo_bat_v(9)
• struct batadv_neigh_ifinfo(9)
• struct batadv_bcast_duplist_entry(9)
• enum batadv_counters(9)
• struct batadv_priv_tt(9)
• struct batadv_priv_bla(9)
• struct batadv_priv_gw(9)
• struct batadv_priv_tvlv(9)
• struct batadv_priv_dat(9)
• struct batadv_mcast_mla_flags(9)
• struct batadv_priv_mcast(9)
• struct batadv_tp_unacked(9)
• struct batadv_tp_vars_common(9)
• struct batadv_tp_sender_cc(9)
• struct batadv_tp_sender(9)
• struct batadv_tp_receiver(9)
• struct batadv_meshif_vlan(9)
• struct batadv_priv_bat_v(9)
• struct batadv_priv(9)
• enum batadv_bla_backbone_gw_state(9)
• struct batadv_bla_backbone_gw(9)
• struct batadv_bla_claim(9)
• struct batadv_tt_common_entry(9)
• struct batadv_tt_local_entry(9)
• struct batadv_tt_global_entry(9)
• struct batadv_tt_orig_list_entry(9)
• struct batadv_tt_change_node(9)
• struct batadv_tt_req_node(9)
• struct batadv_tt_roam_node(9)
• struct batadv_skb_cb(9)
• struct batadv_forw_packet(9)
• struct batadv_algo_iface_ops(9)
• struct batadv_algo_neigh_ops(9)
• struct batadv_algo_orig_ops(9)
• struct batadv_algo_gw_ops(9)
• struct batadv_algo_ops(9)
• struct batadv_dat_entry(9)
• struct batadv_hw_addr(9)
• struct batadv_dat_candidate(9)
• struct batadv_tvlv_container(9)
• struct batadv_tvlv_handler(9)
• enum batadv_tvlv_handler_flags(9)

like okay that's a LOT of friends but she's a social butterfly 🦋 iykyk.

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💀 reminder bestie: shadowing only means anything when exists is set, and even then it's potential shadowing. don't go quoting her as gospel, she's giving possibility not certainty 🙈

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and that's the whole page!! ty for coming to my ted talk, mwah 🎀

from ./net/batman-adv, dated October 2026 — that's the source and the version-and-date energy, and honestly? she's timeless. periodt. 👑🌈⭐