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sshd: fix startWhenNeeded and listenAddresses combination for ipv6 #56340

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sshd: fix startWhenNeeded and listenAddresses combination for ipv6 #56340

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uvNikita
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Motivation for this change

This is a continuation of #56326, @vcunat made a good comment regarding ipv6 support: #56326 (comment)

systemd.socket ListenSteam option requires ipv6 address to be enclosed
in brackets, see https://www.freedesktop.org/software/systemd/man/systemd.socket.html#ListenStream=.

In this implementation, I just check for colon in IP address string, which is not perfect but I'm not sure we need a full ipv6 regex for this purpose either.

Things done
  • Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
  • Built on platform(s)
    • NixOS
    • macOS
    • other Linux distributions
  • Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
  • Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
  • Tested execution of all binary files (usually in ./result/bin/)
  • Determined the impact on package closure size (by running nix path-info -S before and after)
  • Assured whether relevant documentation is up to date
  • Fits CONTRIBUTING.md.

@uvNikita
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cc @lheckemann

@uvNikita
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Hmm, according to https://linux.die.net/man/5/sshd_config, ListenAddress parameter in sshd understands [ipv6]:port notation as well, so I'm not sure if we need to patch this.

@lheckemann
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Yeah, if I understand correctly, passing addr = "::1" wouldn't actually have worked anyway, and this change here would break addr = "[::1]".

@uvNikita
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yeah, you are right. Closing this one then.

@uvNikita uvNikita closed this Feb 25, 2019
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@infinisil infinisil Awaiting requested review from infinisil

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6.topic: nixos 8.has: module (update) 10.rebuild-darwin: 0 10.rebuild-linux: 0
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@uvNikita @lheckemann @GrahamcOfBorg