batadv_mcast_forw_send(9)

👑 batadv_mcast_forw_send(9) — the Kernel API Manual, bestie edition

okay so we're in the batadv_mcast_forw_send page of the Kernel API Manual and honestly? this one's a little baddie. it takes a multicast packet and makes sure the right mesh besties actually get it. let's get into it 💅

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✨ NAME ✨

batadv_mcast_forw_send — literally sends a packet to any detected multicast recipient 🎀

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🌸 SYNOPSIS 🌸

int batadv_mcast_forw_send (struct batadv_priv *bat_priv , struct
sk_buff *skb , unsigned short vid , int is_routable );

like, that's the whole signature, no notes 🔥

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🦋 ARGUMENTS 🦋

• bat_priv — the bat priv, aka the thing holding all the mesh interface information 🫶
• skb — the multicast packet we're transmitting, the main character fr
• vid — the vlan identifier, iykyk
• is_routable — stores whether the destination is routable 👑

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💖 DESCRIPTION 💖

so what it does: it sends copies of a frame with a multicast destination to any node that signaled interest in it. and "signaled interest" means either via the translation table or via the according want-all flags. for each such destination node, a transmission is performed via a batman-adv unicast packet. cute, right? 🧚

⚠️ heads up bestie: the given skb is consumed/freed. like, it's gone. do not touch it after. no cap 💀

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🌈 RETURN 🌈

• NET_XMIT_DROP — when memory allocation fails, or when the protocol family is neither IPv4 nor IPv6 😭
• NET_XMIT_SUCCESS — otherwise, slay ✨

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⭐ SEE ALSO ⭐

the whole group chat, in Kernel file ./net/batman-adv/multicast.c:

• batadv_mcast_start_timer(9)
• batadv_mcast_get_bridge(9)
• batadv_mcast_mla_rtr_flags_meshif_get_ipv4(9)
• batadv_mcast_mla_rtr_flags_meshif_get_ipv6(9)
• batadv_mcast_mla_rtr_flags_meshif_get(9)
• batadv_mcast_mla_rtr_flags_bridge_get(9)
• batadv_mcast_mla_rtr_flags_get(9)
• batadv_mcast_mla_forw_flags_get(9)
• batadv_mcast_mla_flags_get(9)
• batadv_mcast_mla_is_duplicate(9)
• batadv_mcast_mla_meshif_get_ipv4(9)
• batadv_mcast_mla_meshif_get_ipv6(9)
• batadv_mcast_mla_meshif_get(9)
• batadv_mcast_mla_br_addr_cpy(9)
• batadv_mcast_mla_bridge_get(9)
• batadv_mcast_mla_list_free(9)
• batadv_mcast_mla_tt_retract(9)
• batadv_mcast_mla_tt_add(9)
• batadv_mcast_querier_log(9)
• batadv_mcast_bridge_log(9)
• batadv_mcast_flags_log(9)
• batadv_mcast_mla_flags_update(9)
• __batadv_mcast_mla_update(9)
• batadv_mcast_mla_update(9)
• batadv_mcast_is_report_ipv4(9)
• batadv_mcast_forw_mode_check_ipv4(9)
• batadv_mcast_is_report_ipv6(9)
• batadv_mcast_forw_mode_check_ipv6(9)
• batadv_mcast_forw_mode_check(9)
• batadv_mcast_forw_want_all_ip_count(9)
• batadv_mcast_forw_rtr_count(9)
• batadv_mcast_forw_mode_by_count(9)
• batadv_mcast_forw_mode(9)
• batadv_mcast_forw_send_orig(9)
• batadv_mcast_forw_tt(9)
• batadv_mcast_forw_want_all_ipv4(9)
• batadv_mcast_forw_want_all_ipv6(9)
• batadv_mcast_forw_want_all(9)
• batadv_mcast_forw_want_all_rtr4(9)
• batadv_mcast_forw_want_all_rtr6(9)
• batadv_mcast_forw_want_rtr(9)
• batadv_mcast_want_unsnoop_update(9)
• batadv_mcast_want_ipv4_update(9)
• batadv_mcast_want_ipv6_update(9)
• batadv_mcast_want_rtr4_update(9)
• batadv_mcast_want_rtr6_update(9)
• batadv_mcast_have_mc_ptype_update(9)
• batadv_mcast_tvlv_flags_get(9)
• batadv_mcast_tvlv_ogm_handler(9)
• batadv_mcast_init(9)
• batadv_mcast_mesh_info_put(9)
• batadv_mcast_flags_dump_entry(9)
• batadv_mcast_flags_dump_bucket(9)
• __batadv_mcast_flags_dump(9)
• batadv_mcast_netlink_get_primary(9)
• batadv_mcast_flags_dump(9)
• batadv_mcast_free(9)
• batadv_mcast_purge_orig(9)

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and that's the page!! this one came out of ./net/batman-adv in October 2026, part of the Kernel API Manual, and it's filed under batadv_mcast_forw_send(9) — mwah, go read the whole multicast.c bestie 💜