--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/network/core/packet.h	Wed Jan 03 08:32:17 2007 +0000
@@ -0,0 +1,67 @@
+/* $Id$ */
+
+#ifndef NETWORK_CORE_PACKET_H
+#define NETWORK_CORE_PACKET_H
+
+#ifdef ENABLE_NETWORK
+
+/**
+ * @file packet.h Basic functions to create, fill and read packets.
+ */
+
+typedef struct NetworkClientState NetworkClientState;
+
+/**
+ * Queries the network client state struct to determine whether
+ * the client has quit. It indirectly also queries whether the
+ * packet is corrupt as the connection will be closed if it is
+ * reading beyond the boundary of the received packet.
+ * @param cs the state to query
+ * @param true if the connection should be considered dropped
+ */
+bool HasClientQuit(NetworkClientState *cs);
+
+typedef uint16 PacketSize; ///< Size of the whole packet.
+typedef uint8  PacketType; ///< Identifier for the packet
+
+/**
+ * Internal entity of a packet. As everything is sent as a packet,
+ * all network communication will need to call the functions that
+ * populate the packet.
+ * Every packet can be at most SEND_MTU bytes. Overflowing this
+ * limit will give an assertion when sending (i.e. writing) the
+ * packet. Reading past the size of the packet when receiving
+ * will return all 0 values and "" in case of the string.
+ */
+typedef struct Packet {
+	/** The next packet. Used for queueing packets before sending. */
+	struct Packet *next;
+	/** The size of the whole packet for received packets. For packets
+	 * that will be sent, the value is filled in just before the
+	 * actual transmission. */
+	PacketSize size;
+	/** The current read/write position in the packet */
+	PacketSize pos;
+	/** The buffer of this packet */
+	byte buffer[SEND_MTU];
+} Packet;
+
+
+Packet *NetworkSend_Init(PacketType type);
+void NetworkSend_FillPacketSize(Packet *packet);
+void NetworkSend_uint8 (Packet *packet, uint8 data);
+void NetworkSend_uint16(Packet *packet, uint16 data);
+void NetworkSend_uint32(Packet *packet, uint32 data);
+void NetworkSend_uint64(Packet *packet, uint64 data);
+void NetworkSend_string(Packet *packet, const char* data);
+
+void NetworkRecv_ReadPacketSize(Packet *packet);
+uint8  NetworkRecv_uint8 (NetworkClientState *cs, Packet *packet);
+uint16 NetworkRecv_uint16(NetworkClientState *cs, Packet *packet);
+uint32 NetworkRecv_uint32(NetworkClientState *cs, Packet *packet);
+uint64 NetworkRecv_uint64(NetworkClientState *cs, Packet *packet);
+void   NetworkRecv_string(NetworkClientState *cs, Packet *packet, char* buffer, size_t size);
+
+#endif /* ENABLE_NETWORK */
+
+#endif /* NETWORK_CORE_PACKET_H */