*
******************************************************************/
-#include <plib/sg.h>
-
-// Message identifiers
-#define CHAT_MSG_ID 1
-#define POS_DATA_ID 2
-
-#define MAX_CALLSIGN_LEN 10
-/** Header for use with all messages sent */
-typedef struct {
-
- /** Message identifier */
- char MsgId;
-
- /** Length of the message inclusive of this header */
- unsigned int iMsgLen;
-
- /** IP address for reply to message (player's receiver address) */
- unsigned long int lReplyAddress;
-
- /** Port for replies (player's receiver port) */
- unsigned int iReplyPort;
-
- /** Callsign used by the player */
- char sCallsign[MAX_CALLSIGN_LEN];
-
-} T_MsgHdr;
-
-#define MAX_CHAT_MSG_LEN 50
-/** Chat message */
-typedef struct {
+#include <vector>
- /** Text of chat message */
- char sText[MAX_CHAT_MSG_LEN];
-
-} T_ChatMsg;
-
-
-#define MAX_MODEL_NAME_LEN 50
-/** Aircraft position message */
-typedef struct {
-
- /** Name of the aircraft model */
- char sModel[MAX_MODEL_NAME_LEN];
-
- /** Position data for the aircraft */
- sgMat4 PlayerPos;
-
-} T_PositionMsg;
+#include <plib/sg.h>
+#include <simgear/compiler.h>
+#include <simgear/math/SGMath.hxx>
+#include "tiny_xdr.hxx"
+// magic value for messages
+const uint32_t MSG_MAGIC = 0x46474653; // "FGFS"
+// protocoll version
+const uint32_t PROTO_VER = 0x00010001; // 1.1
+// Message identifiers
+#define CHAT_MSG_ID 1
+#define UNUSABLE_POS_DATA_ID 2
+#define OLD_OLD_POS_DATA_ID 3
+#define OLD_POS_DATA_ID 4
+#define OLD_PROP_MSG_ID 5
+#define RESET_DATA_ID 6
+#define POS_DATA_ID 7
+
+// XDR demands 4 byte alignment, but some compilers use8 byte alignment
+// so it's safe to let the overall size of a network message be a
+// multiple of 8!
+#define MAX_CALLSIGN_LEN 8
+#define MAX_CHAT_MSG_LEN 256
+#define MAX_MODEL_NAME_LEN 96
+#define MAX_PROPERTY_LEN 52
+
+// Header for use with all messages sent
+struct T_MsgHdr {
+ xdr_data_t Magic; // Magic Value
+ xdr_data_t Version; // Protocoll version
+ xdr_data_t MsgId; // Message identifier
+ xdr_data_t MsgLen; // absolute length of message
+ xdr_data_t ReplyAddress; // (player's receiver address
+ xdr_data_t ReplyPort; // player's receiver port
+ char Callsign[MAX_CALLSIGN_LEN]; // Callsign used by the player
+};
+
+// Chat message
+struct T_ChatMsg {
+ char Text[MAX_CHAT_MSG_LEN]; // Text of chat message
+};
+
+// Position message
+struct T_PositionMsg {
+ char Model[MAX_MODEL_NAME_LEN]; // Name of the aircraft model
+
+ // Time when this packet was generated
+ xdr_data2_t time;
+ xdr_data2_t lag;
+
+ // position wrt the earth centered frame
+ xdr_data2_t position[3];
+ // orientation wrt the earth centered frame, stored in the angle axis
+ // representation where the angle is coded into the axis length
+ xdr_data_t orientation[3];
+
+ // linear velocity wrt the earth centered frame measured in
+ // the earth centered frame
+ xdr_data_t linearVel[3];
+ // angular velocity wrt the earth centered frame measured in
+ // the earth centered frame
+ xdr_data_t angularVel[3];
+
+ // linear acceleration wrt the earth centered frame measured in
+ // the earth centered frame
+ xdr_data_t linearAccel[3];
+ // angular acceleration wrt the earth centered frame measured in
+ // the earth centered frame
+ xdr_data_t angularAccel[3];
+};
+
+// Property message
+struct T_PropertyMsg {
+ xdr_data_t id;
+ xdr_data_t value;
+};
+
+struct FGFloatPropertyData {
+ unsigned id;
+ float value;
+};
+
+// Position message
+struct FGExternalMotionData {
+ // simulation time when this packet was generated
+ double time;
+ // the artificial lag the client should stay behind the average
+ // simulation time to arrival time diference
+ // FIXME: should be some 'per model' instead of 'per packet' property
+ double lag;
+
+ // position wrt the earth centered frame
+ SGVec3d position;
+ // orientation wrt the earth centered frame
+ SGQuatf orientation;
+
+ // linear velocity wrt the earth centered frame measured in
+ // the earth centered frame
+ SGVec3f linearVel;
+ // angular velocity wrt the earth centered frame measured in
+ // the earth centered frame
+ SGVec3f angularVel;
+
+ // linear acceleration wrt the earth centered frame measured in
+ // the earth centered frame
+ SGVec3f linearAccel;
+ // angular acceleration wrt the earth centered frame measured in
+ // the earth centered frame
+ SGVec3f angularAccel;
+
+ // The set of properties recieved for this timeslot
+ std::vector<FGFloatPropertyData> properties;
+};
#endif
-
-