NetworkSocketAPI / NetworkSocketAPI

Base class for IP Based Networking Libraries

Dependencies:   DnsQuery

Dependents:   TempTower BSDInterfaceTests HelloBSDInterface ESP8266InterfaceTests ... more

For a complete getting started guide see the wiki...

Network Socket API

The Network Socket API provides a common interface for using sockets on network devices. The API provides a simple class-based interface that should be familiar to users experienced with other socket APIs. Additionally, the API provides a simple interface for implementing network devices, making it easy to connect hardware agnostic programs to new devices.

Network Interfaces

The NetworkInterface provides an abstract class for network devices that support sockets. Devices should provide a DeviceInterface class that inherits this interface and adds implementation specific methods for using the device. A NetworkInterface must be provided to a Socket constructor to open a socket on the interface. Currently two subclasses are defined for common devices, EthernetInterface and WiFiInterface.

Sockets

The Socket class is used for managing network sockets. Once opened, the socket provides a pipe through which data can sent and recieved to a specific endpoint. The socket class can be instantiated as either a TCPSocket or a UDPSocket which defines the protocol used for the connection.

Socket.h@92:dd5f19874adf, 2016-04-19 (annotated)

Committer:
Christopher Haster
Date:
Tue Apr 19 18:23:29 2016 -0500
Revision:
92:dd5f19874adf
Parent:
91:cad29ce6a01c
Child:
98:0f614f1d0398
Move to single state-change interrupt



Pros

- Easier to implement

- More similar to SIGIO in BDS sockets



Cons

- Less information, but this information had a high risk of being

  faulty/spurious

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Christopher Haster 89:b1d417383c0d 1 /* Socket
Christopher Haster 89:b1d417383c0d 2 * Copyright (c) 2015 ARM Limited
Christopher Haster 89:b1d417383c0d 3 *
Christopher Haster 89:b1d417383c0d 4 * Licensed under the Apache License, Version 2.0 (the "License");
Christopher Haster 89:b1d417383c0d 5 * you may not use this file except in compliance with the License.
Christopher Haster 89:b1d417383c0d 6 * You may obtain a copy of the License at
Christopher Haster 89:b1d417383c0d 7 *
Christopher Haster 89:b1d417383c0d 8 * http://www.apache.org/licenses/LICENSE-2.0
Christopher Haster 89:b1d417383c0d 9 *
Christopher Haster 89:b1d417383c0d 10 * Unless required by applicable law or agreed to in writing, software
Christopher Haster 89:b1d417383c0d 11 * distributed under the License is distributed on an "AS IS" BASIS,
Christopher Haster 89:b1d417383c0d 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Christopher Haster 89:b1d417383c0d 13 * See the License for the specific language governing permissions and
Christopher Haster 89:b1d417383c0d 14 * limitations under the License.
Christopher Haster 89:b1d417383c0d 15 */
Christopher Haster 89:b1d417383c0d 16
Christopher Haster 89:b1d417383c0d 17 #ifndef SOCKET_H
Christopher Haster 89:b1d417383c0d 18 #define SOCKET_H
Christopher Haster 89:b1d417383c0d 19
Christopher Haster 89:b1d417383c0d 20 #include "SocketAddress.h"
Christopher Haster 89:b1d417383c0d 21 #include "NetworkInterface.h"
Christopher Haster 89:b1d417383c0d 22
Christopher Haster 89:b1d417383c0d 23 /** Abstract socket class
Christopher Haster 89:b1d417383c0d 24 */
Christopher Haster 89:b1d417383c0d 25 class Socket {
Christopher Haster 89:b1d417383c0d 26 public:
Christopher Haster 89:b1d417383c0d 27 /** Socket lifetime
Christopher Haster 89:b1d417383c0d 28 */
Christopher Haster 89:b1d417383c0d 29 virtual ~Socket();
Christopher Haster 90:0a988e4abb72 30
Christopher Haster 90:0a988e4abb72 31 /** Open the socket
Christopher Haster 90:0a988e4abb72 32 * @param iface Interface to open socket on
Christopher Haster 90:0a988e4abb72 33 */
Christopher Haster 90:0a988e4abb72 34 virtual int open(NetworkInterface *iface) = 0;
Christopher Haster 89:b1d417383c0d 35
Christopher Haster 89:b1d417383c0d 36 /** Set blocking or non-blocking mode of the socket
Christopher Haster 89:b1d417383c0d 37 * @param blocking true for blocking mode, false for non-blocking mode.
Christopher Haster 89:b1d417383c0d 38 */
Christopher Haster 89:b1d417383c0d 39 void set_blocking(bool blocking);
Christopher Haster 89:b1d417383c0d 40
Christopher Haster 89:b1d417383c0d 41 /** Set timeout on a socket operation if blocking behaviour is enabled
Christopher Haster 89:b1d417383c0d 42 * @param timeout timeout in ms
Christopher Haster 89:b1d417383c0d 43 */
Christopher Haster 89:b1d417383c0d 44 void set_timeout(unsigned int timeout);
Christopher Haster 89:b1d417383c0d 45
Christopher Haster 89:b1d417383c0d 46 /* Set socket options
Christopher Haster 89:b1d417383c0d 47 * @param optname Option ID
Christopher Haster 89:b1d417383c0d 48 * @param optval Option value
Christopher Haster 89:b1d417383c0d 49 * @param optlen Length of the option value
Christopher Haster 89:b1d417383c0d 50 * @return 0 on success, negative on failure
Christopher Haster 89:b1d417383c0d 51 */
Christopher Haster 89:b1d417383c0d 52 int set_option(int optname, const void *optval, unsigned optlen);
Christopher Haster 89:b1d417383c0d 53
Christopher Haster 89:b1d417383c0d 54 /* Get socket options
Christopher Haster 89:b1d417383c0d 55 * @param optname Option ID
Christopher Haster 89:b1d417383c0d 56 * @param optval Buffer pointer where to write the option value
Christopher Haster 89:b1d417383c0d 57 * @param optlen Length of the option value
Christopher Haster 89:b1d417383c0d 58 * @return 0 on success, negative on failure
Christopher Haster 89:b1d417383c0d 59 */
Christopher Haster 89:b1d417383c0d 60 int get_option(int optname, void *optval, unsigned *optlen);
Christopher Haster 89:b1d417383c0d 61
Christopher Haster 89:b1d417383c0d 62 /** Close the socket
Christopher Haster 89:b1d417383c0d 63 */
Christopher Haster 91:cad29ce6a01c 64 int close();
Christopher Haster 89:b1d417383c0d 65
Christopher Haster 92:dd5f19874adf 66 /** Register a callback on state change of the socket
Christopher Haster 92:dd5f19874adf 67 * @param callback Function to call on state change
Christopher Haster 92:dd5f19874adf 68 * @note Callback may be called in an interrupt context.
Christopher Haster 92:dd5f19874adf 69 * The callback should not perform long operations
Christopher Haster 92:dd5f19874adf 70 * such as recv or send calls.
Christopher Haster 92:dd5f19874adf 71 */
Christopher Haster 92:dd5f19874adf 72 void attach(FunctionPointer callback);
Christopher Haster 92:dd5f19874adf 73
Christopher Haster 92:dd5f19874adf 74 template <typename T, typename M>
Christopher Haster 92:dd5f19874adf 75 void attach(T *tptr, M mptr) {
Christopher Haster 92:dd5f19874adf 76 attach(FunctionPointer(tptr, mptr));
Christopher Haster 92:dd5f19874adf 77 }
Christopher Haster 92:dd5f19874adf 78
Christopher Haster 89:b1d417383c0d 79 protected:
Christopher Haster 90:0a988e4abb72 80 Socket();
Christopher Haster 90:0a988e4abb72 81 int open(NetworkInterface *iface, nsapi_protocol_t proto);
Christopher Haster 89:b1d417383c0d 82
Christopher Haster 89:b1d417383c0d 83 static void thunk(void *);
Christopher Haster 89:b1d417383c0d 84
Christopher Haster 89:b1d417383c0d 85 NetworkInterface *_iface;
Christopher Haster 89:b1d417383c0d 86 void *_socket;
Christopher Haster 89:b1d417383c0d 87 bool _blocking;
Christopher Haster 89:b1d417383c0d 88 unsigned _timeout;
Christopher Haster 92:dd5f19874adf 89 FunctionPointer _callback;
Christopher Haster 89:b1d417383c0d 90 };
Christopher Haster 89:b1d417383c0d 91
Christopher Haster 89:b1d417383c0d 92 #endif