Conversation

Notices

1. Embed this notice
   Chris Siebenmann (cks@mastodon.social)'s status on Thursday, 21-Mar-2024 05:22:45 JST Chris Siebenmann

   This is my face when Python's socket.gethostbyaddr() appears not to be able to return multiple names for a single IP address. Or at least it doesn't on Fedora and Ubuntu with their versions of Python 3.

   (If you want to test it yourself, try 72.136.172.146, which right now returns 17 DNS PTR results for me. I would be interested if this works for you.)

   • silverwizard likes this.
   • Embed this notice
     Haelwenn /элвэн/ :triskell: (lanodan@queer.hacktivis.me)'s status on Thursday, 21-Mar-2024 05:22:45 JST Haelwenn /элвэн/ :triskell:

     in reply to

     @cks Yeah, seems like it, just tried it with the 3 versions I have:

     $ drill -Q -t -x 72.136.172.146 | wc -l 17 $ for i in python3.1{0,1,2}; do printf "$i: "; $i -c 'import socket; print(socket.gethostbyaddr("72.136.172.146"))'; done python3.10: ('stchathamwireless.rogers.com', ['stchathamwireless.rogers.com'], ['72.136.172.146']) python3.11: ('stthunderbaywireless.rogers.com', ['stthunderbaywireless.rogers.com'], ['72.136.172.146']) python3.12: ('stkanatawireless.rogers.com', ['stkanatawireless.rogers.com'], ['72.136.172.146'])
   • Embed this notice
     Haelwenn /элвэн/ :triskell: (lanodan@queer.hacktivis.me)'s status on Thursday, 21-Mar-2024 06:03:28 JST Haelwenn /элвэн/ :triskell:

     in reply to

     • Fink :antifa:

     @fink @cks 72.136.172.146 stgeorgetownwireless.rogers.com stgeorgetownwireless.rogers.com

   • Embed this notice
     Fink :antifa: (fink@chaos.social)'s status on Thursday, 21-Mar-2024 06:03:29 JST Fink :antifa:

     in reply to

     • Haelwenn /элвэн/ :triskell:

     @lanodan @cks 3.11.8 the same. What does `getent hosts 72.136.172.146` tell you?

   • Embed this notice
     Fink :antifa: (fink@chaos.social)'s status on Thursday, 21-Mar-2024 06:03:30 JST Fink :antifa:

     in reply to

     • Haelwenn /элвэн/ :triskell:

     @lanodan @cks 3.12.2 works and retuns a shitload

   • Embed this notice
     Haelwenn /элвэн/ :triskell: (lanodan@queer.hacktivis.me)'s status on Thursday, 21-Mar-2024 06:21:28 JST Haelwenn /элвэн/ :triskell:

     in reply to

     • Fink :antifa:
     @fink @cks Mine is on musl 1.2.5. :D
   • Embed this notice
     Fink :antifa: (fink@chaos.social)'s status on Thursday, 21-Mar-2024 06:21:29 JST Fink :antifa:

     in reply to

     • Haelwenn /элвэн/ :triskell:

     @cks @lanodan No, which glibc?

     I tried on a rather recent archlinux wsl

   • Embed this notice
     Fink :antifa: (fink@chaos.social)'s status on Thursday, 21-Mar-2024 06:21:31 JST Fink :antifa:

     in reply to

     • Haelwenn /элвэн/ :triskell:

     @cks @lanodan Afair that's what python uses too.

     You could also 'strace -f xxx' where xxx is the command. There you can see what happens under the hood and which sys calls are being used. Should be the same at some point.

     Which kernel?

   • Embed this notice
     Chris Siebenmann (cks@mastodon.social)'s status on Thursday, 21-Mar-2024 06:21:32 JST Chris Siebenmann

     in reply to

     • Haelwenn /элвэн/ :triskell:
     • Fink :antifa:

     @lanodan @fink I get a single result from getent (although the name in the result can be random).