batadv_dat_check_dhcp_ipudp(9)

💖 NAME 💖

okay so welcome to the Kernel API Manual, bestie — this is the batadv_dat_check_dhcp_ipudp(9) page, and the function name is batadv_dat_check_dhcp_ipudp. Its whole thing is: check skb for IP+UDP headers valid for DHCP. That's the name vibe, no cap 💅

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✨ SYNOPSIS ✨

like, here's the signature, copied exactly so nobody gets weird about it:

bool batadv_dat_check_dhcp_ipudp (struct sk_buff *skb , __be32 *ip_src
       );

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🎀 ARGUMENTS 🎀

two little inputs, both iconic:

• skb — the packet to check. Yes, that skb, the packet bestie 🫶
• ip_src — a buffer to store the IPv4 source address in. It's where the source address goes if the check passes ✨

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🦋 DESCRIPTION 🦋

So what does it actually do? It checks whether the given skb has an IP header and a UDP header that are valid for a DHCP message from a DHCP server. That's the whole assignment. And if so, it stores the IPv4 source address in the provided buffer. Literally that's it — clean, focused, main character energy 👑

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🌸 RETURN 🌸

Returns true if valid, false otherwise. Simple, clean, no plot twist 💖

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👑 SEE ALSO 👑

okay bestie, the SEE ALSO list is massive and we are not skipping a single one — periodt. First up, the kernel file:

• Kernel file ./net/batman-adv/distributed-arp-table.c

Then all these pages, every last one of them:

• 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_get_vid(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(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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mwah 💋 this page is brought to you by ./net/batman-adv, dated October 2026, and yes, the manual name is batadv_dat_check_dhcp_ipudp(9). slay 🌈