Diff: NetworkInterface.h

Revision:

76:bbe51641f405

Child:

77:b66a6984ed2d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/NetworkInterface.h	Tue Apr 05 09:07:28 2016 -0500
@@ -0,0 +1,190 @@
+/* NetworkInterface Base Class
+ * Copyright (c) 2015 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef NETWORK_INTERFACE_H
+#define NETWORK_INTERFACE_H
+
+/** NetworkInterface class
+ *  Common interface that is shared between all hardware that
+ *  can connect to a network over IP.
+ */
+class NetworkInterface
+{
+public:
+    virtual ~NetworkInterface() {};
+
+    /** Get the internally stored IP address
+    /return     IP address of the interface or null if not yet connected
+    */
+    virtual const char *get_ip_address() = 0;
+
+    /** Get the internally stored MAC address
+    /return     MAC address of the interface
+    */
+    virtual const char *get_mac_address() = 0;
+
+    /** Get the current status of the interface
+    /return     true if connected
+    */
+    virtual bool is_connected() {
+        return get_ip_address() != NULL;
+    }
+
+    /** Looks up the specified host's IP address
+    /param name Hostname to lookup
+    /param port Optional port to pass to SocketAddress
+    /return     Resolved IP address, SocketAddress with null IP address on failure
+    */
+    virtual SocketAddress gethostbyname(const char *name, uint16_t port=0);
+
+protected:
+    /** Enum of socket protocols
+    /enum protocol_t
+    */
+    enum protocol_t {
+        TCP, /*!< Socket is of TCP type */
+        UDP, /*!< Socket is of UDP type */
+    };
+
+    /** Create a socket
+    /param proto    The type of socket to open, TCP or UDP
+    /return         The alocated socket or null on failure
+    */
+    virtual void *socket_create(protocol_t proto) = 0;
+
+    /** Destroy a socket
+    /param socket   Previously allocated socket
+    */
+    virtual void socket_destroy(void *handle) = 0;
+
+    /** Set socket options
+    \param handle   Socket handle
+    \param optname  Option ID
+    \param optval   Option value
+    \param optlen   Length of the option value
+    \return         0 on success, negative on failure
+    */    
+    virtual int socket_set_option(void *handle, int optname, const void *optval, unsigned int optlen) = 0;
+
+    /** Get socket options
+    \param handle   Socket handle
+    \param optname  Option ID
+    \param optval   Buffer pointer where to write the option value
+    \param optlen   Length of the option value
+    \return         0 on success, negative on failure
+    */
+    virtual int socket_get_option(void *handle, int optname, void *optval, unsigned int *optlen) = 0;
+
+    /** Bind a server socket to a specific port
+    \param handle   Socket handle
+    \param port     The port to listen for incoming connections on
+    \return         0 on success, negative on failure.
+    */
+    virtual int socket_bind(void *handle, int port) = 0;
+
+    /** Start listening for incoming connections
+    \param handle   Socket handle
+    \param backlog  Number of pending connections that can be queued up at any
+                    one time [Default: 1]
+    \return         0 on success, negative on failure
+    */
+    virtual int socket_listen(void *handle, int backlog=1) = 0;
+
+    /** Accept a new connection.
+    \param handle   Socket handle
+    \param socket   A TCPSocket instance that will handle the incoming connection.
+    \return         0 on success, negative on failure.
+    */
+    virtual int socket_accept(void *handle, void **connection) = 0;
+    
+    /** Connects this TCP socket to the server
+    \param handle   Socket handle
+    \param address  SocketAddress to connect to
+    \return         0 on success, negative on failure
+    */
+    virtual int socket_connect(void *handle, SocketAddress address) = 0;
+
+    /** Check if the socket is connected
+    \param handle   Socket handle
+    \return         true if connected, false otherwise
+    */
+    virtual bool socket_is_connected(void *handle);
+
+    /** Send data to the remote host
+    \param handle   Socket handle
+    \param data     The buffer to send to the host
+    \param size     The length of the buffer to send
+    \return         Number of written bytes on success, negative on failure
+    */
+    virtual int socket_send(void *handle, const void *data, unsigned size) = 0;
+
+    /** Receive data from the remote host
+    \param handle   Socket handle
+    \param data     The buffer in which to store the data received from the host
+    \param size     The maximum length of the buffer
+    \return         Number of received bytes on success, negative on failure
+    */
+    virtual int socket_recv(void *handle, void *data, unsigned size) = 0;
+
+    /** Send a packet to a remote endpoint
+    \param handle   Socket handle
+    \param address  The remote SocketAddress
+    \param data     The packet to be sent
+    \param size     The length of the packet to be sent
+    \return the number of written bytes on success, negative on failure
+    */
+    virtual int socket_sendto(void *handle, SocketAddress address, const void *data, unsigned size) = 0;
+
+    /** Receive a packet from a remote endpoint
+    \param handle   Socket handle
+    \param address  Destination for the remote SocketAddress or null
+    \param buffer   The buffer for storing the incoming packet data
+                    If a packet is too long to fit in the supplied buffer,
+                    excess bytes are discarded
+    \param size     The length of the buffer
+    \return the number of received bytes on success, negative on failure
+    */
+    virtual int socket_recvfrom(void *handle, SocketAddress *address, void *buffer, unsigned size) = 0;
+
+    /** Close the socket
+    \param handle   Socket handle
+    \param shutdown  free the left-over data in message queues
+    */
+    virtual int socket_close(void *handle, bool shutdown) = 0;
+
+    /** Register a callback on when a new connection is ready
+    \param handle   Socket handle
+    \param callback Function to call when accept will succeed, may be called in
+                    interrupt context.
+    */
+    virtual void socket_attach_accept(void *handle, FuncPtr<void()> callback) = 0;
+
+    /** Register a callback on when send is ready
+    \param handle   Socket handle
+    \param callback Function to call when send will succeed, may be called in
+                    interrupt context.
+    */
+    virtual void socket_attach_send(void *handle, FuncPtr<void()> callback) = 0;
+
+    /** Register a callback on when recv is ready
+    \param handle   Socket handle
+    \param callback Function to call when recv will succeed, may be called in
+                    interrupt context.
+    */
+    virtual void socket_attach_recv(void *handle, FuncPtr<void()> callback) = 0;
+};
+
+#endif