sel_netport_sid_slow(9)

📦 version 7.3.1, in nixpkgs unstable

💅 sel_netport_sid_slow — like, the slow one, but make it slay

okay bestie, welcome to section 9 of the Kernel API Manual, and yes we're talking about sel_netport_sid_slow today. it's a kernel function, it's got the word "slow" in the name, and honestly? she owns it. 🐌✨

🌸 NAME 🌸

sel_netport_sid_slow — literally looks up the SID of a network address by asking the policy. that's the whole gig. no cap.

🦋 SYNOPSIS 🦋

int sel_netport_sid_slow (u8 protocol , u16 pnum , u32 *sid );

like, three args, one return value, and she's int. iconic behavior tbh.

🎀 ARGUMENTS 🎀

  • protocol — the protocol. yeah. that's the description. it's a u8, it's a protocol, we move. 💅
  • pnum — the port. (pnum = port number, iykyk 🧚)
  • sid — the port SID. this one's a pointer (u32 *), so she's writing back to you, not just chatting. 🫶

💖 DESCRIPTION 💖

so here's the vibe: this function figures out the SID of a network port by querying the security policy. that's the main character moment right there. 🔥

and then — because future-you deserves nice things — the result gets added to the network port table so upcoming queries are speedier. caching! we love her! ⭐

return value tea: it returns zero on success, and negative values on failure. so if you see a negative number, something went sideways, no cap. 😭

lowkey important: sel_netport_sid_slow is the slow path. the whole point of that table insert is so you don't have to keep coming back here. respect the cache, bestie. 💀

🌈 SEE ALSO 🌈

this whole thing lives in the kernel file ./security/selinux/netport.c, and honestly the friend group is:

go say hi. they're all in the same file, it's giving family reunion. 👑

and that's the page, pookie! 🍓 this lil number comes to you from ./security/selinux, dated October 2026, and it's filed under sel_netport_sid_slow(9) — go forth and query that policy responsibly. 💜✨🦋

📦 where this page comes from