in4_pton(9)

🎀 in4_pton(9) 🎀

okay so bestie, welcome to the Kernel API Manual — yes that's the manual name, we're fancy here 💅 — and today's main character is in4_pton, which is literally the glow-up from IPv4 literal to binary. no cap.

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✨ NAME ✨

in4_pton — convert an IPv4 address from literal to binary representation 🦋

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🌸 SYNOPSIS 🌸

int in4_pton (const char *src , int srclen , u8 *dst , int delim , const
char **end );

like, five arguments, all iconic, all doing their job 👑

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💖 ARGUMENTS 💖

• src — the start of the IPv4 address string. this is where the vibe begins, fr fr.
• srclen — the length of the string. and plot twist: -1 means strlen(src) — she'll figure it out herself, self-sufficient queen ✨
• dst — the binary (u8[4] array) representation of the IPv4 address. yes, exactly u8[4], not "whatever", she counts 🌈
• delim — the delimiter of the IPv4 address in src, and -1 means no delimiter. boundaries, we love to see them 🫶
• end — A pointer to the end of the parsed string will be placed here. she leaves a little note for you, cute 😭

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🦋 DESCRIPTION 🦋

Return one on success 💚 — that's the win, that's the slay.

Return zero when any error occurs 😭 (yeah, zero is the bad ending) and end will point to the end of the parsed string.

that's it, that's the whole personality. simple, effective, no toxic complexity.

bestie heads up: zero is the error return here, so do not get it twisted — one means success, zero means something went wrong 💀

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🧚 SEE ALSO 🧚

• Kernel file ./net/core/utils.c — the literal address of the function, go read the source iykyk 👑
• in6_pton(9) — her IPv6 cousin, equally iconic 🌟
• inet_pton_with_scope(9) — the scoped one 🔥
• inet_proto_csum_replace16(9) — checksum energy, very main character ⭐

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and that's the whole page, bestie 💜 — brought to you by the crew at ./net/core, stamped October 2026, and honestly? ate. periodt. 🎀🌸💅