Split up Socket and Rcon classes to be engine specific extensions.

SourceQuery/Socket/GoldSourceSocket.php

@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+namespace xPaw\SourceQuery\Socket;
+
+use xPaw\SourceQuery\Buffer;
+
+final class GoldSourceSocket extends AbstractSocket
+{
+    /**
+     * @return int
+     */
+    public function getType(): int
+    {
+        return SocketType::GOLDSOURCE;
+    }
+
+    /**
+     * @param Buffer $buffer
+     * @param int $count
+     * @param int $number
+     * @param bool $isCompressed
+     * @param int|null $checksum
+     */
+    protected function readInternalPacketData(
+        Buffer $buffer,
+        int &$count,
+        int &$number,
+        bool &$isCompressed,
+        ?int &$checksum
+    ): void {
+        $packetCountAndNumber = $buffer->getByte();
+        $count = $packetCountAndNumber & 0xF;
+        $number = $packetCountAndNumber >> 4;
+        $isCompressed = false;
+    }
+}