Use Unix Domain Sockets for LS internal connections.

src/Radio/Backend/Liquidsoap.php

@@ -57,19 +57,6 @@ class Liquidsoap extends AbstractBackend
         return $event->buildConfiguration();
     }
 
-    /**
-     * Returns the internal port used to relay requests and other changes from AzuraCast to LiquidSoap.
-     *
-     * @param Entity\Station $station
-     *
-     * @return int The port number to use for this station.
-     */
-    public function getTelnetPort(Entity\Station $station): int
-    {
-        $settings = $station->getBackendConfig();
-        return $settings->getTelnetPort() ?? ($this->getStreamPort($station) - 1);
-    }
-
     /**
      * Returns the port used for DJs/Streamers to connect to LiquidSoap for broadcasting.
      *
@@ -175,12 +162,10 @@ class Liquidsoap extends AbstractBackend
      */
     public function command(Entity\Station $station, string $command_str): array
     {
-        $uri = $this->environment->getUriToStations()
-            ->withScheme('tcp')
-            ->withPort($this->getTelnetPort($station));
+        $socketPath = 'unix://' . $station->getRadioConfigDir() . '/liquidsoap.sock';
 
         $fp = stream_socket_client(
-            (string)$uri,
+            $socketPath,
             $errno,
             $errstr,
             20

src/Radio/Backend/Liquidsoap/ConfigWriter.php

@@ -109,7 +109,7 @@ class ConfigWriter implements EventSubscriberInterface
         $configDir = $station->getRadioConfigDir();
         $pidfile = $configDir . DIRECTORY_SEPARATOR . 'liquidsoap.pid';
 
-        $telnetPort = $this->liquidsoap->getTelnetPort($station);
+        $socketFile = $configDir . DIRECTORY_SEPARATOR . 'liquidsoap.sock';
 
         $stationTz = self::cleanUpString($station->getTimezone());
 
@@ -123,9 +123,9 @@ class ConfigWriter implements EventSubscriberInterface
             
             settings.server.log.level.set(4)
             
-            settings.server.telnet.set(true)
-            settings.server.telnet.bind_addr.set("127.0.0.1")
-            settings.server.telnet.port.set(${telnetPort})
+            settings.server.socket.set(true)
+            settings.server.socket.permissions.set(0o660)
+            settings.server.socket.path.set("${socketFile}")
             
             settings.harbor.bind_addrs.set(["0.0.0.0"])