batadv_dat_get_vid(9)

💅 batadv_dat_get_vid(9) — like, the Kernel API Manual era ✨

okay bestie, welcome to the Kernel API Manual 💖 this one's all about batadv_dat_get_vid and honestly? she's a little diva with a realloc warning, so pay attention 🎀

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✨ NAME ✨

batadv_dat_get_vid — extract the VLAN identifier from skb if any 🦋 (yes, if any, she's conditional like that)

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🌸 SYNOPSIS 🌸

unsigned short batadv_dat_get_vid (struct sk_buff *skb , int *hdr_size
);

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🎀 ARGUMENTS 🎀

• skb — the buffer containing the packet to extract the VID from, iykyk 🫶
• hdr_size — the size of the batman-adv header encapsulating the packet, literally the header size bestie 💫

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💜 DESCRIPTION 💜

okay so the caller must ensure that at least hdr_size + ETH_HLEN bytes are accessible after skb->data. that's on you, not on her 💅

⚠️ Warning, and I mean it: this function calls batadv_get_vid and may therefore reallocate the skb data buffer 😭 any pointer into the skb data (e.g. obtained from skb->data or eth_hdr) before this call must be considered invalid afterwards and has to be reacquired. no cap, do not keep those stale pointers around, they will betray you 💀

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👑 RETURN 👑

if the packet embedded in the skb is vlan tagged, this function returns the VID with the BATADV_VLAN_HAS_TAG flag 🌈 otherwise BATADV_NO_FLAGS is returned. slay, simple as that ✨

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🌟 SEE ALSO 🌟

the kernel file is ./net/batman-adv/distributed-arp-table.c — go look, she ate 🔥

and then the whole extended friend group, all of them, no skipped invites 💖:

• enum batadv_bootpop(9)
• enum batadv_boothtype(9)
• enum batadv_dhcpoptioncode(9)
• enum batadv_dhcptype(9)
• struct batadv_dhcp_packet(9)
• struct batadv_dhcp_header(9)
• struct batadv_dhcp_option_header(9)
• batadv_dat_start_timer(9)
• batadv_dat_entry_release(9)
• batadv_dat_entry_put(9)
• batadv_dat_to_purge(9)
• __batadv_dat_purge(9)
• batadv_dat_purge(9)
• batadv_compare_dat(9)
• batadv_arp_hw_src(9)
• batadv_arp_ip_src(9)
• batadv_arp_hw_dst(9)
• batadv_arp_ip_dst(9)
• batadv_hash_dat(9)
• batadv_dat_entry_hash_find(9)
• batadv_dat_entry_add(9)
• batadv_dbg_arp(9)
• batadv_is_orig_node_eligible(9)
• batadv_choose_next_candidate(9)
• batadv_dat_select_candidates(9)
• batadv_dat_forward_data(9)
• batadv_dat_tvlv_container_update(9)
• batadv_dat_status_update(9)
• batadv_dat_tvlv_ogm_handler_v1(9)
• batadv_dat_hash_free(9)
• batadv_dat_init(9)
• batadv_dat_free(9)
• batadv_dat_cache_dump_entry(9)
• batadv_dat_cache_dump_bucket(9)
• batadv_dat_cache_dump(9)
• batadv_arp_get_type(9)
• batadv_dat_arp_create_reply(9)
• batadv_dat_snoop_outgoing_arp_request(9)
• batadv_dat_snoop_incoming_arp_request(9)
• batadv_dat_snoop_outgoing_arp_reply(9)
• batadv_dat_snoop_incoming_arp_reply(9)
• batadv_dat_check_dhcp_ipudp(9)
• batadv_dat_check_dhcp(9)
• batadv_dat_get_dhcp_message_type(9)
• batadv_dat_dhcp_get_yiaddr(9)
• batadv_dat_get_dhcp_chaddr(9)
• batadv_dat_put_dhcp(9)
• batadv_dat_check_dhcp_ack(9)
• batadv_dat_snoop_outgoing_dhcp_ack(9)
• batadv_dat_snoop_incoming_dhcp_ack(9)
• batadv_dat_drop_broadcast_packet(9)

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🫶 and that's the whole page babes!! brought to you by the folks over at ./net/batman-adv, dated October 2026, and this absolute icon of a manpage is batadv_dat_get_vid(9) — periodt 💅✨🧚💜