feat(Core): replace ACE network with Boost.Asio (#6574)

src/server/game/Server/Protocol/ServerPktHeader.h

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
+ * Copyright (C) 2021+ WarheadCore <https://github.com/WarheadCore>
+ */
+
+#ifndef __SERVERPKTHDR_H__
+#define __SERVERPKTHDR_H__
+
+#include "Log.h"
+
+#pragma pack(push, 1)
+
+struct ServerPktHeader
+{
+    /**
+     * size is the length of the payload _plus_ the length of the opcode
+     */
+    ServerPktHeader(uint32 size, uint16 cmd) : size(size)
+    {
+        uint8 headerIndex=0;
+        if (isLargePacket())
+        {
+            LOG_DEBUG("network", "initializing large server to client packet. Size: %u, cmd: %u", size, cmd);
+            header[headerIndex++] = 0x80 | (0xFF & (size >> 16));
+        }
+        header[headerIndex++] = 0xFF &(size >> 8);
+        header[headerIndex++] = 0xFF & size;
+
+        header[headerIndex++] = 0xFF & cmd;
+        header[headerIndex++] = 0xFF & (cmd >> 8);
+    }
+
+    uint8 getHeaderLength()
+    {
+        // cmd = 2 bytes, size= 2||3bytes
+        return 2 + (isLargePacket() ? 3 : 2);
+    }
+
+    bool isLargePacket() const
+    {
+        return size > 0x7FFF;
+    }
+
+    const uint32 size;
+    uint8 header[5];
+};
+
+#pragma pack(pop)
+
+#endif