softether: support SoftEther VPN 4.18

lib/maintainers.nix

···
   refnil = "Martin Lavoie <[e-mail]>";
   relrod = "Ricky Elrod <[e-mail]>";
   renzo = "Renzo Carbonara <[e-mail]>";
+  rick68 = "Wei-Ming Yang <[e-mail]>";
   rickynils = "Rickard Nilsson <[e-mail]>";
   rob = "Rob Vermaas <[e-mail]>";
   robberer = "Longrin Wischnewski <[e-mail]>";

nixos/modules/module-list.nix

···
   ./services/networking/seeks.nix
   ./services/networking/skydns.nix
   ./services/networking/shout.nix
+  ./services/networking/softether.nix
   ./services/networking/spiped.nix
   ./services/networking/sslh.nix
   ./services/networking/ssh/lshd.nix

nixos/modules/services/networking/softether.nix

···
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  pkg = pkgs.softether;
+  cfg = config.services.softether;
+
+in
+{
+
+  ###### interface
+
+  options = {
+
+    services.softether = {
+
+      enable = mkEnableOption "SoftEther VPN services";
+
+      vpnserver.enable = mkEnableOption "SoftEther VPN Server";
+
+      vpnbridge.enable = mkEnableOption "SoftEther VPN Bridge";
+
+      vpnclient = {
+        enable = mkEnableOption "SoftEther VPN Client";
+        up = mkOption {
+          type = types.lines;
+          default = "";
+          description = ''
+            Shell commands executed when the Virtual Network Adapter(s) is/are starting.
+          '';
+        };
+        down = mkOption {
+          type = types.lines;
+          default = "";
+          description = ''
+            Shell commands executed when the Virtual Network Adapter(s) is/are shutting down.
+          '';
+        };
+      };
+
+      dataDir = mkOption {
+        type = types.string;
+        default = "${pkg.dataDir}";
+        description = ''
+          Data directory for SoftEther VPN.
+        '';
+      };
+
+    };
+
+  };
+
+  ###### implementation
+
+  config = mkIf cfg.enable (
+
+    mkMerge [{
+      environment.systemPackages = [
+          (pkgs.lib.overrideDerivation pkg (attrs: {
+            dataDir = cfg.dataDir;
+          }))
+        ];
+      jobs.softether = {
+        description = "SoftEther VPN services initial job";
+        startOn = "started network-interfaces";
+        preStart = ''
+            for d in vpnserver vpnbridge vpnclient vpncmd; do
+                if ! test -e ${cfg.dataDir}/$d; then
+                    ${pkgs.coreutils}/bin/mkdir -m0700 -p ${cfg.dataDir}/$d
+                    install -m0600 ${pkg}${cfg.dataDir}/$d/hamcore.se2 ${cfg.dataDir}/$d/hamcore.se2
+                fi
+            done
+            rm -rf ${cfg.dataDir}/vpncmd/vpncmd
+            ln -s ${pkg}${cfg.dataDir}/vpncmd/vpncmd ${cfg.dataDir}/vpncmd/vpncmd
+        '';
+        exec = "true";
+      };
+    }
+
+    (mkIf (cfg.vpnserver.enable) {
+      systemd.services.vpnserver = {
+        description = "SoftEther VPN Server";
+        after = [ "network-interfaces.target" ];
+        wantedBy = [ "multi-user.target" ];
+        serviceConfig = {
+          ExecStart = "${pkg}/bin/vpnserver start";
+          ExecStop = "${pkg}/bin/vpnserver stop";
+          Type = "forking";
+        };
+        preStart = ''
+            rm -rf ${cfg.dataDir}/vpnserver/vpnserver
+            ln -s ${pkg}${cfg.dataDir}/vpnserver/vpnserver ${cfg.dataDir}/vpnserver/vpnserver
+        '';
+        postStop = ''
+            rm -rf ${cfg.dataDir}/vpnserver/vpnserver
+        '';
+      };
+    })
+
+    (mkIf (cfg.vpnbridge.enable) {
+      systemd.services.vpnbridge = {
+        description = "SoftEther VPN Bridge";
+        after = [ "network-interfaces.target" ];
+        wantedBy = [ "multi-user.target" ];
+        serviceConfig = {
+          ExecStart = "${pkg}/bin/vpnbridge start";
+          ExecStop = "${pkg}/bin/vpnbridge stop";
+          Type = "forking";
+        };
+        preStart = ''
+            rm -rf ${cfg.dataDir}/vpnbridge/vpnbridge
+            ln -s ${pkg}${cfg.dataDir}/vpnbridge/vpnbridge ${cfg.dataDir}/vpnbridge/vpnbridge
+        '';
+        postStop = ''
+            rm -rf ${cfg.dataDir}/vpnbridge/vpnbridge
+        '';
+      };
+    })
+
+    (mkIf (cfg.vpnclient.enable) {
+      systemd.services.vpnclient = {
+        description = "SoftEther VPN Client";
+        after = [ "network-interfaces.target" ];
+        wantedBy = [ "multi-user.target" ];
+        serviceConfig = {
+          ExecStart = "${pkg}/bin/vpnclient start";
+          ExecStop = "${pkg}/bin/vpnclient stop";
+          Type = "forking";
+        };
+        preStart = ''
+            rm -rf ${cfg.dataDir}/vpnclient/vpnclient
+            ln -s ${pkg}${cfg.dataDir}/vpnclient/vpnclient ${cfg.dataDir}/vpnclient/vpnclient
+        '';
+        postStart = ''
+            sleep 1
+            ${cfg.vpnclient.up}
+        '';
+        postStop = ''
+            rm -rf ${cfg.dataDir}/vpnclient/vpnclient
+            sleep 1
+            ${cfg.vpnclient.down}
+        '';
+      };
+      boot.kernelModules = [ "tun" ];
+    })
+
+  ]);
+
+}

pkgs/servers/softether/4.18.nix

···
+{ stdenv, fetchurl
+, openssl, readline, ncurses, zlib }:
+
+let
+  os = if stdenv.isLinux then "1"
+       else if stdenv.isFreeBSD then "2"
+       else if stdenv.isSunOS then "3"
+       else if stdenv.isDarwin then "4"
+       else if stdenv.isOpenBSD then "5"
+       else "";
+  cpuBits = if stdenv.is64bit then "2" else "1";
+
+in
+
+stdenv.mkDerivation rec {
+  name = "softether-${version}";
+  version = "4.18";
+  build = "9570";
+  compiledDate = "2015.07.26";
+  dataDir = "/var/lib/softether";
+
+  src = fetchurl {
+    url = "http://www.softether-download.com/files/softether/v${version}-${build}-rtm-${compiledDate}-tree/Source_Code/softether-src-v${version}-${build}-rtm.tar.gz";
+    sha256 = "585d61e524d3cad90806cbeb52ebe54b5144359e6c44676e8e7fb5683ffd4574";
+  };
+
+  buildInputs = [ openssl readline ncurses zlib ];
+
+  preConfigure = ''
+      echo "${os}
+      ${cpuBits}
+      " | ./configure
+      rm configure
+  '';
+
+  buildPhase = ''
+      mkdir -p $out/bin
+      sed -i \
+          -e "/INSTALL_BINDIR=/s|/usr/bin|/bin|g" \
+          -e "/_DIR=/s|/usr|${dataDir}|g" \
+          -e "s|\$(INSTALL|$out/\$(INSTALL|g" \
+          -e "/echo/s|echo $out/|echo |g" \
+          Makefile
+  '';
+
+  meta = with stdenv.lib; {
+    description = "An Open-Source Free Cross-platform Multi-protocol VPN Program";
+    homepage = https://www.softether.org/;
+    license = licenses.gpl2;
+    maintainers = [ maintainers.rick68 ];
+    platforms = platforms.all;
+  };
+}

pkgs/top-level/all-packages.nix

···
 
   socat2pre = lowPrio (callPackage ../tools/networking/socat/2.x.nix { });
 
+  softether_4_18 = callPackage ../servers/softether/4.18.nix { };
+  softether = softether_4_18;
+
   sourceHighlight = callPackage ../tools/text/source-highlight { };
 
   spaceFM = callPackage ../applications/misc/spacefm { };