nixpkgs/pkgs/tools/networking/hans/default.nix

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{ lib, stdenv, fetchFromGitHub, nettools }:
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stdenv.mkDerivation rec {
pname = "hans";
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version = "1.1";
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src = fetchFromGitHub {
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sha256 = "sha256-r6IDs8Seys94LBNnedcfVX5aW8x//ZN0Yh/DGTg8niA=";
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rev = "v${version}";
repo = "hans";
owner = "friedrich";
};
buildInputs = [ nettools ];
postPatch = ''
substituteInPlace src/tun.cpp --replace "/sbin/" "${nettools}/bin/"
'';
enableParallelBuilding = true;
installPhase = ''
install -D -m0755 hans $out/bin/hans
'';
meta = with lib; {
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description = "Tunnel IPv4 over ICMP";
longDescription = ''
Hans makes it possible to tunnel IPv4 through ICMP echo packets, so you
could call it a ping tunnel. This can be useful when you find yourself in
the situation that your Internet access is firewalled, but pings are
allowed.
'';
homepage = "https://code.gerade.org/hans/";
license = licenses.gpl3Plus;
platforms = platforms.linux;
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};
}