rte_cksum.h(3)

💖 rte_cksum.h — a library functions manual, but make it cute 💖

okay bestie, so this is rte_cksum.h, a header from DPDK, and it's genuinely iconic — it's your protocol-independent checksum toolkit. no cap. if you've ever needed to compute a checksum and didn't wanna care what protocol you're in, this is the girl. 🎀

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✨ NAME ✨

rte_cksum.h — that's it, that's the name. short, slay, to the point. 💅

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🌸 SYNOPSIS 🌸

first, the vibe check — you gotta bring in the headers:

#include <stdint.h>
#include <rte_byteorder.h>
#include <rte_common.h>
#include <rte_mbuf.h>

🦋 Functions

here are the two functions, both static and both inline, so they're living their best little life in your compilation unit:

static uint16_t rte_raw_cksum (const void *buf, size_t len)
static int rte_raw_cksum_mbuf (const struct rte_mbuf *m, uint32_t off,
    uint32_t len, uint16_t *cksum)

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💜 Detailed Description 💜

Protocol independent checksum utilities.

like. it does not care what protocol you're in. it just sums. obsessed. 🌈

Definition in file rte_cksum.h.

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👑 Function Documentation 👑

⭐ uint16_t rte_raw_cksum (const void * buf, size_t len) [inline], [static]

it does the thing: process the non-complemented checksum of a buffer. note the non-complemented part, bestie — it hands you the raw sum, not the one's-complement flip. you gotta do that yourself if that's your goal. 🙈

Parameters

• buf — Pointer to the buffer.
• len — Length of the buffer.

Returns

• The non-complemented checksum.

Definition at line 94 of file rte_cksum.h.

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🌟 int rte_raw_cksum_mbuf (const struct rte_mbuf * m, uint32_t off, uint32_t len, uint16_t * cksum) [inline], [static]

now this one is the mbuf girlie — it'll compute the raw (non complemented) checksum of a packet. again: raw, non-complemented, no extra seasoning. 🔥

Parameters

• m — The pointer to the mbuf.
• off — The offset in bytes to start the checksum.
• len — The length in bytes of the data to checksum.
• cksum — A pointer to the checksum, filled on success.

Returns

• 0 on success, -1 on error (bad length or offset).

⚠️ heads up bestie: bad length or bad offset and she will NOT hesitate — that's a -1, fr fr. check your inputs before you send it. 💀

Definition at line 117 of file rte_cksum.h.

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🫶 Author 🫶

Generated automatically by Doxygen for DPDK from the source code.

like, no human wrote this, a robot did, and honestly? it ate. ✨

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and that's the whole page, bestie!! this was DPDK, Version 25.11.3, for rte_cksum.h(3) — go forth and checksum responsibly, you got this 🎀💖🦋⭐