mininet: init at 2.3.0d4 (#41261)

Mininet (https://github.com/mininet/mininet) is a popular network emulator that
glues several components such as network namespaces, traffic control
commands into a set of python bindings. It is then "easy" to describe a
topology and run experiments on it.

nixos/modules/module-list.nix

@@ -103,6 +103,7 @@
   ./programs/less.nix
   ./programs/light.nix
   ./programs/mosh.nix
+  ./programs/mininet.nix
   ./programs/mtr.nix
   ./programs/nano.nix
   ./programs/npm.nix

nixos/modules/programs/mininet.nix

@@ -0,0 +1,39 @@
+# Global configuration for mininet
+# kernel must have NETNS/VETH/SCHED
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg  = config.programs.mininet;
+
+  generatedPath = with pkgs; makeSearchPath "bin"  [
+    iperf ethtool iproute socat
+  ];
+
+  pyEnv = pkgs.python.withPackages(ps: [ ps.mininet-python ]);
+
+  mnexecWrapped = pkgs.runCommand "mnexec-wrapper"
+    { buildInputs = [ pkgs.makeWrapper pkgs.pythonPackages.wrapPython ]; }
+    ''
+      makeWrapper ${pkgs.mininet}/bin/mnexec \
+        $out/bin/mnexec \
+        --prefix PATH : "${generatedPath}"
+
+      ln -s ${pyEnv}/bin/mn $out/bin/mn
+
+      # mn errors out without a telnet binary
+      # pkgs.telnet brings an undesired ifconfig into PATH see #43105
+      ln -s ${pkgs.telnet}/bin/telnet $out/bin/telnet
+    '';
+in
+{
+  options.programs.mininet.enable = mkEnableOption "Mininet";
+
+  config = mkIf cfg.enable {
+
+    virtualisation.vswitch.enable = true;
+
+    environment.systemPackages = [ mnexecWrapped ];
+  };
+}

pkgs/tools/virtualization/mininet/default.nix

@@ -0,0 +1,48 @@
+{ stdenv, lib, fetchFromGitHub
+, which
+, python
+, help2man
+}:
+
+let
+  pyEnv = python.withPackages(ps: [ ps.setuptools ]);
+in
+stdenv.mkDerivation rec {
+  name = "mininet-${version}";
+  version = "2.3.0d4";
+
+  outputs = [ "out" "py" ];
+
+  src = fetchFromGitHub {
+    owner = "mininet";
+    repo = "mininet";
+    rev = version;
+    sha256 = "02hsqa7r5ykj8m1ycl32xwn1agjrw78wkq87xif0dl2vkzln41i4";
+  };
+
+  buildFlags = [ "mnexec" ];
+  makeFlags = [ "PREFIX=$(out)" ];
+
+  pythonPath = [ python.pkgs.setuptools ];
+  buildInputs = [ python which help2man ];
+
+  installTargets = [ "install-mnexec" "install-manpages" ];
+
+  preInstall = ''
+    mkdir -p $out $py
+    # without --root, install fails
+    ${pyEnv.interpreter} setup.py install --root="/" --prefix=$py
+  '';
+
+  doCheck = false;
+
+
+  meta = with lib; {
+    description = "Emulator for rapid prototyping of Software Defined Networks";
+    license = {
+      fullName = "Mininet 2.3.0d4 License";
+    };
+    homepage = https://github.com/mininet/mininet;
+    maintainers = with maintainers; [ teto ];
+  };
+}

pkgs/top-level/all-packages.nix

@@ -21734,6 +21734,8 @@ with pkgs;
 
   scotch = callPackage ../applications/science/math/scotch { };
 
+  mininet = callPackage ../tools/virtualization/mininet { };
+
   msieve = callPackage ../applications/science/math/msieve { };
 
   weka = callPackage ../applications/science/math/weka { };

pkgs/top-level/python-packages.nix

@@ -422,6 +422,8 @@ in {
 
   monty = callPackage ../development/python-modules/monty { };
 
+  mininet-python = (toPythonModule (pkgs.mininet.override{ inherit python; })).py;
+
   mpi4py = callPackage ../development/python-modules/mpi4py {
     mpi = pkgs.openmpi;
   };