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|
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.xrdp;
confDir = pkgs.runCommand "xrdp.conf" { preferLocalBuild = true; } ''
mkdir $out
cp ${cfg.package}/etc/xrdp/{km-*,xrdp,sesman,xrdp_keyboard}.ini $out
cat > $out/startwm.sh <<EOF
#!/bin/sh
. /etc/profile
${cfg.defaultWindowManager}
EOF
chmod +x $out/startwm.sh
substituteInPlace $out/xrdp.ini \
--replace "#rsakeys_ini=" "rsakeys_ini=/run/xrdp/rsakeys.ini" \
--replace "certificate=" "certificate=${cfg.sslCert}" \
--replace "key_file=" "key_file=${cfg.sslKey}" \
--replace LogFile=xrdp.log LogFile=/dev/null \
--replace EnableSyslog=true EnableSyslog=false
substituteInPlace $out/sesman.ini \
--replace LogFile=xrdp-sesman.log LogFile=/dev/null \
--replace EnableSyslog=1 EnableSyslog=0
# Ensure that clipboard works for non-ASCII characters
sed -i -e '/.*SessionVariables.*/ a\
LANG=${config.i18n.defaultLocale}\
LOCALE_ARCHIVE=${config.i18n.glibcLocales}/lib/locale/locale-archive
' $out/sesman.ini
'';
in
{
###### interface
options = {
services.xrdp = {
enable = mkEnableOption "xrdp, the Remote Desktop Protocol server";
package = mkOption {
type = types.package;
default = pkgs.xrdp;
defaultText = literalExpression "pkgs.xrdp";
description = ''
The package to use for the xrdp daemon's binary.
'';
};
port = mkOption {
type = types.int;
default = 3389;
description = ''
Specifies on which port the xrdp daemon listens.
'';
};
openFirewall = mkOption {
default = false;
type = types.bool;
description = "Whether to open the firewall for the specified RDP port.";
};
sslKey = mkOption {
type = types.str;
default = "/etc/xrdp/key.pem";
example = "/path/to/your/key.pem";
description = ''
ssl private key path
A self-signed certificate will be generated if file not exists.
'';
};
sslCert = mkOption {
type = types.str;
default = "/etc/xrdp/cert.pem";
example = "/path/to/your/cert.pem";
description = ''
ssl certificate path
A self-signed certificate will be generated if file not exists.
'';
};
defaultWindowManager = mkOption {
type = types.str;
default = "xterm";
example = "xfce4-session";
description = ''
The script to run when user log in, usually a window manager, e.g. "icewm", "xfce4-session"
This is per-user overridable, if file ~/startwm.sh exists it will be used instead.
'';
};
confDir = mkOption {
type = types.path;
default = confDir;
defaultText = literalDocBook "generated from configuration";
description = "The location of the config files for xrdp.";
};
};
};
###### implementation
config = mkIf cfg.enable {
networking.firewall.allowedTCPPorts = mkIf cfg.openFirewall [ cfg.port ];
# xrdp can run X11 program even if "services.xserver.enable = false"
xdg = {
autostart.enable = true;
menus.enable = true;
mime.enable = true;
icons.enable = true;
};
fonts.enableDefaultFonts = mkDefault true;
systemd = {
services.xrdp = {
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
description = "xrdp daemon";
requires = [ "xrdp-sesman.service" ];
preStart = ''
# prepare directory for unix sockets (the sockets will be owned by loggedinuser:xrdp)
mkdir -p /tmp/.xrdp || true
chown xrdp:xrdp /tmp/.xrdp
chmod 3777 /tmp/.xrdp
# generate a self-signed certificate
if [ ! -s ${cfg.sslCert} -o ! -s ${cfg.sslKey} ]; then
mkdir -p $(dirname ${cfg.sslCert}) || true
mkdir -p $(dirname ${cfg.sslKey}) || true
${pkgs.openssl.bin}/bin/openssl req -x509 -newkey rsa:2048 -sha256 -nodes -days 365 \
-subj /C=US/ST=CA/L=Sunnyvale/O=xrdp/CN=www.xrdp.org \
-config ${cfg.package}/share/xrdp/openssl.conf \
-keyout ${cfg.sslKey} -out ${cfg.sslCert}
chown root:xrdp ${cfg.sslKey} ${cfg.sslCert}
chmod 440 ${cfg.sslKey} ${cfg.sslCert}
fi
if [ ! -s /run/xrdp/rsakeys.ini ]; then
mkdir -p /run/xrdp
${cfg.package}/bin/xrdp-keygen xrdp /run/xrdp/rsakeys.ini
fi
'';
serviceConfig = {
User = "xrdp";
Group = "xrdp";
PermissionsStartOnly = true;
ExecStart = "${cfg.package}/bin/xrdp --nodaemon --port ${toString cfg.port} --config ${cfg.confDir}/xrdp.ini";
};
};
services.xrdp-sesman = {
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
description = "xrdp session manager";
restartIfChanged = false; # do not restart on "nixos-rebuild switch". like "display-manager", it can have many interactive programs as children
serviceConfig = {
ExecStart = "${cfg.package}/bin/xrdp-sesman --nodaemon --config ${cfg.confDir}/sesman.ini";
ExecStop = "${pkgs.coreutils}/bin/kill -INT $MAINPID";
};
};
};
users.users.xrdp = {
description = "xrdp daemon user";
isSystemUser = true;
group = "xrdp";
};
users.groups.xrdp = {};
security.pam.services.xrdp-sesman = { allowNullPassword = true; startSession = true; };
};
}
|