Add interface for easy protocol implementation

This commit adds a protocol interface to the server, its purpose is to manage TCP connections and the various third-party protocols.

More specifically, ProtoHandleConnection() takes care of exchanging the packets between the local and remote endpoint; the protocol implementation only has to parse them and act accordingly.

The interface knows which protocol is the connection for by calling IsPacketForMe(), a function implemented for each protocol.

src/Mayaqua/MayaType.h

@@ -421,6 +421,7 @@ typedef struct TUBEPAIR_DATA TUBEPAIR_DATA;
 typedef struct UDPLISTENER UDPLISTENER;
 typedef struct UDPLISTENER_SOCK UDPLISTENER_SOCK;
 typedef struct UDPPACKET UDPPACKET;
+typedef struct TCP_RAW_DATA TCP_RAW_DATA;
 typedef struct INTERRUPT_MANAGER INTERRUPT_MANAGER;
 typedef struct TUBE_FLUSH_LIST TUBE_FLUSH_LIST;
 typedef struct ICMP_RESULT ICMP_RESULT;

src/Mayaqua/Network.c

@@ -18980,6 +18980,40 @@ UDPLISTENER_SOCK *DetermineUdpSocketForSending(UDPLISTENER *u, UDPPACKET *p)
 	return NULL;
 }
 
+void FreeTcpRawData(TCP_RAW_DATA *trd)
+{
+	// Validate arguments
+	if (trd == NULL)
+	{
+		return;
+	}
+
+	ReleaseFifo(trd->Data);
+	Free(trd);
+}
+
+TCP_RAW_DATA *NewTcpRawData(IP *src_ip, UINT src_port, IP *dst_ip, UINT dst_port)
+{
+	TCP_RAW_DATA *trd;
+	// Validate arguments
+	if (dst_ip == NULL || dst_port == 0)
+	{
+		return NULL;
+	}
+
+	trd = ZeroMalloc(sizeof(TCP_RAW_DATA));
+
+	Copy(&trd->SrcIP, src_ip, sizeof(IP));
+	trd->SrcPort = src_port;
+
+	Copy(&trd->DstIP, dst_ip, sizeof(IP));
+	trd->DstPort = dst_port;
+
+	trd->Data = NewFifoFast();
+
+	return trd;
+}
+
 // Release of the UDP packet
 void FreeUdpPacket(UDPPACKET *p)
 {

src/Mayaqua/Network.h

@@ -456,6 +456,16 @@ struct TUBEPAIR_DATA
 	SOCK_EVENT *SockEvent1, *SockEvent2;	// SockEvent
 };
 
+// TCP raw data
+struct TCP_RAW_DATA
+{
+	IP SrcIP;							// Source IP address
+	IP DstIP;							// Destination IP address
+	UINT SrcPort;						// Source port
+	UINT DstPort;						// Destination port
+	FIFO *Data;							// Data body
+};
+
 // UDP listener socket entry
 struct UDPLISTENER_SOCK
 {
@@ -1411,6 +1421,8 @@ void AddPortToUdpListener(UDPLISTENER *u, UINT port);
 void DeletePortFromUdpListener(UDPLISTENER *u, UINT port);
 void DeleteAllPortFromUdpListener(UDPLISTENER *u);
 void UdpListenerSendPackets(UDPLISTENER *u, LIST *packet_list);
+TCP_RAW_DATA *NewTcpRawData(IP *src_ip, UINT src_port, IP *dst_ip, UINT dst_port);
+void FreeTcpRawData(TCP_RAW_DATA *trd);
 UDPPACKET *NewUdpPacket(IP *src_ip, UINT src_port, IP *dst_ip, UINT dst_port, void *data, UINT size);
 void FreeUdpPacket(UDPPACKET *p);
 UDPLISTENER_SOCK *DetermineUdpSocketForSending(UDPLISTENER *u, UDPPACKET *p);