WiP (adding paths)
[oweals/gnunet.git] / src / mesh / mesh.h
index 2c260030d110fe3cc877e2037c527b44e5918da2..bbfad3225f56c9e26fd5ca8885b45e5b7cd246d8 100644 (file)
 #define MESH_H_
 #include <stdint.h>
 
-#include <gnunet_mesh_service.h>
+#include <gnunet_mesh_service_new.h>
 #include "gnunet_common.h"
 
 /******************************************************************************/
-/********************      MESH NETWORK MESSAGES     **************************/
+/********************        MESH LOCAL MESSAGES      *************************/
 /******************************************************************************/
-/* API CALL                         MESSAGE USED
- * --------                         ------------
- * connect                          GNUNET_MESH_Connect
- * disconnect                       Server_disconnect
+/*  Any API call should be documented in the folowing table under API CALL.
+ *  Also, any message type should be documented in the following table, with the
+ * associated event.
+ * 
+ * API CALL (GNUNET_MESH_*)             MESSAGE USED
+ * ------------------------             ------------
+ * connect                              GNUNET_MESH_ClientConnect
+ * disconnect                           None (network level disconnect)
  *
- * peer_request_connect_any         GNUNET_MESH_ConnectPeer
- * peer_request_connect_all         GNUNET_MESH_ConnectPeer
- * peer_request_connect_add         GNUNET_MESH_ConnectPeer
- * peer_request_connect_del         GNUNET_MESH_ConnectPeer
- * peer_request_connect_by_type     GNUNET_MESH_ConnectPeerByType
- * peer_request_connect_cancel      GNUNET_MESH_Control
+ * tunnel_create                        GNUNET_MESH_TunnelMessage
+ * tunnel_destroy                       GNUNET_MESH_TunnelMessage
  *
- * notify_transmit_ready            GNUNET_MESH_Control
- * notify_transmit_ready_cancel     None
+ * peer_request_connect_add             GNUNET_MESH_PeerControl
+ * peer_request_connect_del             GNUNET_MESH_PeerControl
+ * peer_request_connect_by_type         GNUNET_MESH_ConnectPeerByType
+ *
+ * notify_transmit_ready                GNUNET_MESH_TransmitReady
+ * notify_transmit_ready_cancel         None (clear of internal data structures)
+ * 
+ * 
+ * 
+ * EVENT                                MESSAGE USED
+ * -----                                ------------
+ * notify_transmit_ready reply          GNUNET_MESH_TransmitReady
+ * notify_transmit_ready data           GNUNET_MESH_Data OR
+ *                                      GNUNET_MESH_DataBroadcast
+ * new incoming tunnel                  GNUNET_MESH_PeerControl
+ * peer connects to a tunnel            GNUNET_MESH_PeerControl
+ * peer disconnects from a tunnel       GNUNET_MESH_PeerControl
  */
 
-struct GNUNET_MESH_Connect {
+/******************************************************************************/
+/**************************       CONSTANTS      ******************************/
+/******************************************************************************/
+
+#define GNUNET_MESH_LOCAL_TUNNEL_ID_MARK 0x80000000
+
+
+/******************************************************************************/
+/**************************        MESSAGES      ******************************/
+/******************************************************************************/
+
+/**
+ * Message for a client to register to the service
+ */
+struct GNUNET_MESH_ClientConnect {
     /**
      * Type: GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT
      *
-     * Size: sizeof(struct GNUNET_MESH_Connect) + messages_subscribed * sizeof (message_type)
+     * Size: sizeof(struct GNUNET_MESH_ClientConnect) +
+     *       sizeof(uint16_t) * types +
+     *       sizeof(MESH_ApplicationType) * applications
      */
     struct GNUNET_MessageHeader header;
-
-    /* uint16_t messages_subscribed[] */
+    uint16_t                    types           GNUNET_PACKED;
+    uint16_t                    applications    GNUNET_PACKED;
+    /* uint16_t                 list_types[types]           */
+    /* uint16_t                 list_apps[applications]     */
 };
 
-struct GNUNET_MESH_ConnectPeer {
+
+/**
+ * Type for tunnel numbering.
+ * - Local tunnel numbers are >= 0x80000000
+ * - Global tunnel numbers are < 0x80000000
+ */
+typedef uint32_t MESH_TunnelNumber;
+
+/**
+ * Message for a client to create and destroy tunnels.
+ */
+struct GNUNET_MESH_TunnelMessage {
     /**
-     * Type: GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_[ANY|ALL|ADD|DEL]
-     * 
-     * Size: sizeof(struct GNUNET_MESH_ConnectPeer) + npeers * sizeof (struct GNUNET_PeerIdentity)
+     * Type: GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_[CREATE|DESTROY]
+     *
+     * Size: sizeof(struct GNUNET_MESH_TunnelMessage)
      */
     struct GNUNET_MessageHeader header;
 
-    /* struct GNUNET_PeerIdentity peers[] */
+    /**
+     * ID of a tunnel controlled by this client.
+     */
+    MESH_TunnelNumber           tunnel_id GNUNET_PACKED;
+};
+
+/**
+ * Message for:
+ * - request adding and deleting peers from a tunnel
+ * - notify the client that peers have connected:
+ *   -- requested
+ *   -- unrequested (new incoming tunnels)
+ * - notify the client that peers have disconnected
+ */
+struct GNUNET_MESH_PeerControl {
+
+  /**
+   * Type: GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_[ADD|DEL]
+   *       (client to service, client created tunnel)
+   *       GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_[CONNECTED|DISCONNECTED]
+   *       (service to client)
+   * 
+   * Size: sizeof(struct GNUNET_MESH_PeerControl) 
+   */
+  struct GNUNET_MessageHeader   header;
+
+  /**
+   * ID of a tunnel controlled by this client.
+   */
+   MESH_TunnelNumber            tunnel_id GNUNET_PACKED;
+  
+  /**
+   * Peer to connect/disconnect.
+   */
+  struct GNUNET_PeerIdentity    peer;
 };
 
+
+/**
+ * Message for connecting to peers offering a certain service.
+ */
 struct GNUNET_MESH_ConnectPeerByType {
     /**
      * Type: GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_BY_TYPE
      */
     struct GNUNET_MessageHeader header;
 
-    /* Type specification */
-    GNUNET_MESH_ApplicationType type;
+  /**
+   * ID of a tunnel controlled by this client.
+   */
+   MESH_TunnelNumber            tunnel_id GNUNET_PACKED;
+  /**
+   * Type specification 
+   */
+    GNUNET_MESH_ApplicationType type GNUNET_PACKED;
 };
 
-struct GNUNET_MESH_Control {
+
+/**
+ *  Message for notifying the service that the client wants to send data or
+ * notifying a client that the service is ready to accept data.
+ */
+struct GNUNET_MESH_TransmitReady {
     /**
-     * Type: GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_CANCEL
-     *       GNUNET_MESSAGE_TYPE_MESH_LOCAL_TRANSMIT_READY
+     * Type: GNUNET_MESSAGE_TYPE_MESH_LOCAL_REQUEST_TRANSMIT_READY
+     *       GNUNET_MESSAGE_TYPE_MESH_LOCAL_NOTIFY_TRANSMIT_READY
      */
     struct GNUNET_MessageHeader header;
 
-    uint32_t tunnel_id GNUNET_PACKED;
-    uint32_t variable GNUNET_PACKED; /* Size of data / connection ID */
-};
-
-struct GNUNET_MESH_TunnelEvent {
     /**
-     * Type: GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_[CREATED\DESTROYED]
+     * ID of a tunnel controlled by this client.
      */
-    struct GNUNET_MessageHeader header;
+    MESH_TunnelNumber           tunnel_id GNUNET_PACKED;
 
-    uint32_t tunnel_id GNUNET_PACKED;
-    uint32_t reason GNUNET_PACKED; /* incoming, connect, timeout, disconnect */
+    /**
+     * Size of message we would like to transmit to this tunnel
+     */
+    uint32_t                    msg_size GNUNET_PACKED; 
 };
 
+
+/**
+ * Message to encapsulate data transmitted to/from the service
+ */
 struct GNUNET_MESH_Data {
     /**
      * Type: GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA
-     *
+     *       (client to service, or service to client)
      * Size: sizeof(struct GNUNET_MESH_Data) + sizeof (data)
      */
     struct GNUNET_MessageHeader header;
 
-    uint32_t tunnel_id GNUNET_PACKED;
+    /**
+     * ID of a tunnel controlled by this client.
+     */
+    MESH_TunnelNumber           tunnel_id GNUNET_PACKED;
 
-    struct GNUNET_PeerIdentity destination;
+    /**
+     * Source or destination of the message (depending on direction).
+     */
+    struct GNUNET_PeerIdentity  peer_id;
 
     /* uint8_t data[] */
 };
 
+/**
+ * Message to encapsulate broadcast data transmitted to the service
+ */
 struct GNUNET_MESH_DataBroadcast {
     /**
      * Type: GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA_BROADCAST
-     *
+     *       (client to service only, client created tunnel)
      * Size: sizeof(struct GNUNET_MESH_DataBroadcast) + sizeof (data)
      */
     struct GNUNET_MessageHeader header;
 
-    uint32_t tunnel_id GNUNET_PACKED;
+    /**
+     * ID of a tunnel controlled by this client.
+     */
+    MESH_TunnelNumber           tunnel_id GNUNET_PACKED;
 
     /* uint8_t data[] */
 };
 
+
 #endif