kernel_sock_ip_overhead(9)

💖 NAME 💖

kernel_sock_ip_overhead — bestie, this one literally tells you the IP overhead that a socket is imposing ✨

(also hi, you're reading the Kernel API Manual, welcome to the group chat 🫶)

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🌸 SYNOPSIS 🌸

u32 kernel_sock_ip_overhead (struct sock *sk );

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🎀 ARGUMENTS 🎀

• sk — the socket. that's it. that's the whole argument. iconic of it honestly 👑

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🦋 DESCRIPTION 🦋

okay so picture this: this routine returns the IP overhead imposed by a socket — like, the actual length of the underlying IP header 👀 and that number depends on two things:

• whether this is an IPv4 or an IPv6 socket 💅
• the length that comes from IP options that are turned on at the socket ✨

⚠️ important vibe check: this assumes that the caller has a lock on the socket. no lock, no peace, bestie. don't come crying to me 😭

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🌈 SEE ALSO 🌈

Kernel file ./net/socket.c — and here's the whole friend group, no cap, everybody's invited 🫶:

• move_addr_to_kernel(9)
• move_addr_to_user(9)
• sock_read_xattr(9)
• sock_alloc_file(9)
• sock_from_file(9)
• sockfd_lookup(9)
• sock_alloc(9)
• sock_release(9)
• sock_sendmsg(9)
• kernel_sendmsg(9)
• sock_recvmsg(9)
• kernel_recvmsg(9)
• sock_create_lite(9)
• __sock_create(9)
• sock_create(9)
• sock_create_kern(9)
• sock_register(9)
• sock_unregister(9)
• kernel_bind(9)
• kernel_listen(9)
• kernel_accept(9)
• kernel_connect(9)
• kernel_getsockname(9)
• kernel_getpeername(9)
• kernel_sock_shutdown(9)

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that's the whole page, mwah 💋

this little masterpiece lives in ./net, it's dated October 2026, and it's filed under kernel_sock_ip_overhead(9) — go forth and compute your overheads, bestie, i'm obsessed with you fr fr 🎀💜