udp_internals(3)

✨ udp_internals ✨

okay so bestie, welcome to the udp_internals(3) page 💖 this is a Library Functions Manual situation, and honestly? it's giving backstage pass energy. you're in the library functions part of the building now.

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🌸 NAME 🌸

udp_internals — Internal UDP functions 🦋

like… the secret little helpers. the ones behind the curtain. iykyk.

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💅 SYNOPSIS 💅

Functions

void nfq_udp_compute_checksum_ipv4 (struct udphdr *udph, struct iphdr *iph)
void nfq_udp_compute_checksum_ipv6 (struct udphdr *udph, struct ip6_hdr *ip6h)

two functions. that's the whole lineup. periodt. 👑

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🎀 Detailed Description 🎀

Most user-space programs will never need these.

fr fr. like, no cap — if you're writing a normal little user-space program, these are not your problem, bestie. they're internal. the vibes are backstage, not main stage. 💀

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🧚 Function Documentation 🧚

void nfq_udp_compute_checksum_ipv4 (struct udphdr * udph, struct iphdr * iph)

nfq_udp_compute_checksum_ipv4 — sets up the UDP checksum in a UDP/IPv4 packet. that's it, that's the job, and it does it slayfully. ✨

Parameters

• udph — pointer to the UDP header 🫶
• iph — pointer to the IPv4 header 💜

Note

nfq_udp_mangle_ipv4() invokes this function. As long as developers always use nfq_udp_mangle_ipv4 when changing the content of a UDP message, there is no need to call nfq_udp_compute_checksum_ipv4.

so like… the way that nfq_udp_mangle_ipv4() already calls this for you?? 🥹 if you always use nfq_udp_mangle_ipv4 when you're changing the content of a UDP message, you genuinely do not need to call nfq_udp_compute_checksum_ipv4 yourself. it's already handled. don't do extra work, it's not the vibe. 💅

Definition at line 108 of file udp.c. 📍

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void nfq_udp_compute_checksum_ipv6 (struct udphdr * udph, struct ip6_hdr * ip6h)

nfq_udp_compute_checksum_ipv6 — sets up the UDP checksum in a UDP/IPv6 packet. same energy, different protocol, iconic as always. 🌈

Parameters

• udph — pointer to the UDP header 🫶
• ip6h — pointer to the IPv6 header ⭐

Note

nfq_udp_mangle_ipv6() invokes this function. As long as developers always use nfq_udp_mangle_ipv6 when changing the content of a UDP message, there is no need to call nfq_udp_compute_checksum_ipv6.

yeah bestie, same deal as the IPv4 one — nfq_udp_mangle_ipv6() invokes this function, so as long as you always use nfq_udp_mangle_ipv6 when you're changing the content of a UDP message, there is no need to call nfq_udp_compute_checksum_ipv6. the mangle function is your main character, let it cook. 🍓

Definition at line 126 of file udp.c. 📍

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👑 Author 👑

Generated automatically by Doxygen for libnetfilter_queue from the source code.

(not me getting auto-generated by doxygen 😭 it's literally a machine-written baddie)

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and that's the whole page, bestie!! 🎀 this was libnetfilter_queue, Version 1.0.5, and the page is udp_internals(3) — we did it, we read the whole thing, ate and left no crumbs. mwah 💖✨