STRUCT UDP_TABLE(9)

💖 NAME 💖

okay bestie, welcome to the struct udp_table(9) page in the Kernel API Manual — and yes, this is literally the UDP table. struct udp_table — UDP table. That’s the whole vibe. 💅✨

🦋 SYNOPSIS 🦋

here’s the struct in all its iconic glory, no cap:

       struct udp_table {
           struct udp_hslot        *hash;
           struct udp_hslot_main   *hash2;
         #if !IS_ENABLED(CONFIG_BASE_SMALL);
           struct udp_hslot        *hash4;
         #endif;
           unsigned int            mask;
           unsigned int            log;
        };

that #if !IS_ENABLED(CONFIG_BASE_SMALL); situation around hash4? yeah, it’s right there in the struct, bestie 🫶

🌸 Members 🌸

• hash — hash table, sockets are hashed on (local port) 💖
• hash2 — hash table, sockets are hashed on (local port, local address) 🎀
• hash4 — hash table, connected sockets are hashed on (local port, local address, remote port, remote address) 🦋
• mask — number of slots in hash tables, minus 1 🔥
• log — log2(number of slots in hash table) ⭐

like, each member is doing its own little main character thing, and honestly? obsessed 😌💅

🔥 SEE ALSO 🔥

go peek at these besties, fr fr:

• Kernel file ./include/net/udp.h 📁
• struct udp_skb_cb(9) 🧚
• struct udp_hslot(9) ✨
• struct udp_hslot_main(9) 🌈
• udp_csum_outgoing(9) 👑

mwah 💋 — this little page is sourced from ./include/net, dated October 2026, and it’s struct udp_table(9) in the Kernel API Manual. go off, bestie 💖🎀