ip_compute_csum(9)

💖 ip_compute_csum(9) 💖

okay so bestie, this is the Kernel API Manual page for ip_compute_csum(9), and it's lowkey iconic: she computes an 16bit IP checksum. periodt ✨

🌸 NAME 🌸

ip_compute_csum — compute an 16bit IP checksum. that's it, that's the whole gig, and she ate. 💅

✨ SYNOPSIS ✨

__sum16 ip_compute_csum (const void *buff , int len );

🎀 ARGUMENTS 🎀

• buff — buffer address. like, where the buffer is at, bestie. 📍
• len — length of buffer. the size of the buffer, fr fr. 📏

💖 RETURN 💖

returns the 16bit folded/inverted checksum of the passed buffer. Ready to fill in. 🫶✨

that's the return value, bestie. no cap. 💯

🦋 SEE ALSO 🦋

the kernel file ./arch/x86/include/asm/checksum_64.h, plus these besties:

• csum_fold(9)
• ip_fast_csum(9)
• csum_tcpudp_nofold(9)
• csum_tcpudp_magic(9)
• csum_partial(9)
• csum_ipv6_magic(9)

signing off from the source/version tag ./arch/x86/include/asm, dated October 2026, for ip_compute_csum(9) — mwah 💋🎀✨