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import "ecere"
/////////////////////////////////////////////////////////////////////
typedef byte XDWord[4];
typedef byte XWord[2];
#define MDWORD(a,b) ((((uint32)((uint16)(b)))<<16)+((uint16)(a)))
#define LOWORD(l) ((uint16)(l))
#define HIWORD(l) ((uint16)(((uint32)(l) >> 16) & 0xFFFF))
#define SWAP_WORD(word) (((uint16)(word) & 0x00ff) << 8) \
| (((uint16)(word) & 0xff00) >> 8)
#define SWAP_DWORD(dword) ((((uint32)(dword) & 0x000000ff) << 24) \
| (((uint32)(dword) & 0x0000ff00) << 8) \
| (((uint32)(dword) & 0x00ff0000) >> 8) \
| (((uint32)(dword) & 0xff000000) >> 24))
#define PUTXDWORD(b, d) \
(b)[0] = (byte)(((d) >> 24) & 0xFF); \
(b)[1] = (byte)(((d) >> 16) & 0xFF); \
(b)[2] = (byte)(((d) >> 8) & 0xFF); \
(b)[3] = (byte)( (d) & 0xFF);
#define XDWORD(d) \
{ \
(byte)(((d) >> 24) & 0xFF), \
(byte)(((d) >> 16) & 0xFF), \
(byte)(((d) >> 8) & 0xFF), \
(byte)((d) & 0xFF) \
}
#define GETXDWORD(b) (uint32)(((b)[0] << 24) | ((b)[1] << 16) | ((b)[2] << 8) | (b)[3])
#define PUTXWORD(b, w) \
(b)[0] = (byte)(((w) >> 8) & 0xFF); \
(b)[1] = (byte)(((w) ) & 0xFF);
#define XWORD(w) \
{ \
(byte)(((w) >> 8) & 0xFF), \
(byte)((w) & 0xFF) \
}
#define GETXWORD(b) (uint16)(((b)[0] << 8) | (b)[1])
/////////////////////////////////////////////////////////////////////
define SERVER_PORT = 7649;
define MAX_HANDLES = 16;
// Packets sent from Client to Server
class BasePacket : struct
{
byte type[4];
byte size[4];
};
class OpenPacket : BasePacket
{
byte fileNameLen[4];
char fileName[1]; // Rest follows, null terminated
};
class ClosePacket : BasePacket
{
byte handle[4];
};
class ReadPacket : BasePacket
{
byte handle[4];
byte readStart[4];
byte readSize[4];
};
class SizePacket : BasePacket
{
byte handle[4];
};
enum PacketType { open, close, read, size };
class NetworkServer : Service
{
OldList clients { offset = (uint)(uintptr)&((ClientConnection)0).prev };
void OnAccept()
{
ClientConnection socket { this };
clients.Add(socket);
Logf("Connection from %s, port %d\n", socket.inetAddress, SERVER_PORT);
}
};
class ClientConnection : Socket
{
ClientConnection prev, next;
File handles[MAX_HANDLES];
byte * readBuf;
uint readSize;
uint OnReceive(const byte * buffer, uint count)
{
if(count >= sizeof(class Packet))
{
BasePacket packetHeader = (BasePacket) buffer;
if(count >= GETXDWORD(packetHeader.size))
{
Log("received packet\n");
switch((PacketType)GETXDWORD(packetHeader.type))
{
case open:
{
OpenPacket packet = (OpenPacket) packetHeader;
byte reply[4] = XDWORD(MAXDWORD);
int c;
Log("Open\n");
for(c = 0; c < MAX_HANDLES; c++)
{
if(!handles[c])
break;
}
// Test valid free handle
if(c < MAX_HANDLES)
{
handles[c] = FileOpen(packet.fileName, read);
if(handles[c])
PUTXDWORD(reply, c+1);
}
Send(reply, sizeof(reply));
break;
}
case close:
{
ClosePacket packet = (ClosePacket) packetHeader;
uint handle = GETXDWORD(packet.handle);
Log("Close\n");
if(handle > 0 && handle <= MAX_HANDLES)
{
File file = handles[handle-1];
if(file)
{
delete file;
handles[handle-1] = null;
}
}
break;
}
case read:
{
ReadPacket packet = (ReadPacket) packetHeader;
byte reply[4];
uint handle = GETXDWORD(packet.handle);
uint realRead = 0;
Log("Read\n");
if(handle > 0 && handle <= MAX_HANDLES)
{
File file = handles[handle-1];
if(file)
{
uint readSize = GETXDWORD(packet.readSize);
if(readSize > this.readSize)
{
readBuf = renew readBuf byte[readSize];
this.readSize = readSize;
}
if(readBuf)
{
file.Seek(GETXDWORD(packet.readStart), start);
realRead = file.Read(readBuf, 1, readSize);
}
}
}
PUTXDWORD(reply, realRead);
Send(reply, sizeof(reply));
Send(readBuf, realRead);
break;
}
case size:
{
SizePacket packet = (SizePacket) packetHeader;
byte reply[4] = XDWORD(0);
uint handle = GETXDWORD(packet.handle);
Logf("Size %d\n",handle);
if(handle > 0 && handle <= MAX_HANDLES)
{
File file = handles[handle-1];
if(file)
{
uint size;
file.Seek(0, end);
size = file.Tell();
PUTXDWORD(reply, size);
}
}
Send(reply, sizeof(reply));
break;
}
default:
Log("Unknown packet type\n");
}
Log("Request processed\n");
return GETXDWORD(packetHeader.size);
}
}
return 0;
}
void OnDisconnect(int code)
{
delete readBuf;
((NetworkServer)service).clients.Remove(this);
}
}
NetworkServer tcpServer { port = SERVER_PORT };
class ServerApp : GuiApplication
{
void Main()
{
// SetLoggingMode(stdout, null);
SetLoggingMode(0, null);
if(tcpServer.Start())
{
Log("Server started\n");
while(true)
{
WaitEvent();
ProcessNetworkEvents();
}
}
}
}
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