is_unicast_ether_addr(9)

📦 version 7.3.1, in nixpkgs unstable

💅 is_unicast_ether_addr(9) 💅

okay so bestie, welcome to the Kernel API Manual — section 9 if we're being precise, and we ARE being precise. this is one of those tiny little helpers from ./include/linux/etherdevice.h that does exactly one thing and does it iconically ✨

🌸 NAME 🌸

is_unicast_ether_addr — the vibe check that tells you whether an Ethernet address is unicast 🦋

like, that's it. that's the whole job. and she ate.

✨ SYNOPSIS ✨

bool is_unicast_ether_addr (const u8 *addr );

look at her. one parameter. returns a bool. no drama, no cap 🎀

🎀 ARGUMENTS 🎀

  • addr — a pointer to a six-byte array that's holding your Ethernet address 💖 six bytes, bestie. not five, not seven. the address lives in there and this function is gonna peek at it.

👑 RETURN 👑

it hands you back true if the address is a unicast address. that's the whole return contract, and honestly? clean. simple. main character energy 💅

lowkey important: true is the only documented outcome here — the manpage doesn't promise anything about the other branch, so don't go making up stories about it 🙈

🔥 SEE ALSO 🔥

this is the part where the friend group shows up, because is_unicast_ether_addr rolls with a whole squad in the kernel file ./include/linux/etherdevice.h:

ngl that's a whole roster — every single one of them is listed right there under ./include/linux/etherdevice.h, so go read the whole collection if you're obsessed (and you should be) 🫶

okay bye bestie, mwah 💋 this page came from ./include/linux, dated October 2026, and it's filed under is_unicast_ether_addr(9) — go be a unicast icon 🧚‍♀️⭐

📦 where this page comes from