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@99:f51358e506c1, 2016-04-19 (annotated)

Committer:
Christopher Haster
Date:
Tue Apr 19 18:25:12 2016 -0500
Revision:
99:f51358e506c1
Parent:
98:0f614f1d0398
Child:
103:37decbcb1108
Revised stack specific configurations



Adds the following functions for direct configuration of interface

- (set|get)stackopt

- (set|get)sockopt

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 99:f51358e506c1 36 /** Close the socket
Christopher Haster 99:f51358e506c1 37 */
Christopher Haster 99:f51358e506c1 38 int close();
Christopher Haster 99:f51358e506c1 39
Christopher Haster 98:0f614f1d0398 40 /** Bind a socket to a specific port
Christopher Haster 98:0f614f1d0398 41 * @param port The port to listen for incoming connections on
Christopher Haster 98:0f614f1d0398 42 * @return 0 on success, negative on failure.
Christopher Haster 98:0f614f1d0398 43 */
Christopher Haster 98:0f614f1d0398 44 int bind(uint16_t port);
Christopher Haster 98:0f614f1d0398 45
Christopher Haster 98:0f614f1d0398 46 /** Bind a socket to a specific port
Christopher Haster 98:0f614f1d0398 47 * @param address The null-terminated address to listen for incoming connections on
Christopher Haster 98:0f614f1d0398 48 * @param port The port to listen for incoming connections on
Christopher Haster 98:0f614f1d0398 49 * @return 0 on success, negative on failure.
Christopher Haster 98:0f614f1d0398 50 */
Christopher Haster 98:0f614f1d0398 51 int bind(const char *address, uint16_t port);
Christopher Haster 98:0f614f1d0398 52
Christopher Haster 98:0f614f1d0398 53 /** Bind a socket to a specific port
Christopher Haster 98:0f614f1d0398 54 * @param address The SocketAddress to listen for incoming connections on
Christopher Haster 98:0f614f1d0398 55 * @return 0 on success, negative on failure.
Christopher Haster 98:0f614f1d0398 56 */
Christopher Haster 98:0f614f1d0398 57 int bind(const SocketAddress &address);
Christopher Haster 98:0f614f1d0398 58
Christopher Haster 89:b1d417383c0d 59 /** Set blocking or non-blocking mode of the socket
Christopher Haster 89:b1d417383c0d 60 * @param blocking true for blocking mode, false for non-blocking mode.
Christopher Haster 89:b1d417383c0d 61 */
Christopher Haster 89:b1d417383c0d 62 void set_blocking(bool blocking);
Christopher Haster 89:b1d417383c0d 63
Christopher Haster 89:b1d417383c0d 64 /** Set timeout on a socket operation if blocking behaviour is enabled
Christopher Haster 89:b1d417383c0d 65 * @param timeout timeout in ms
Christopher Haster 89:b1d417383c0d 66 */
Christopher Haster 89:b1d417383c0d 67 void set_timeout(unsigned int timeout);
Christopher Haster 89:b1d417383c0d 68
Christopher Haster 89:b1d417383c0d 69 /* Set socket options
Christopher Haster 99:f51358e506c1 70 * @param level Option level
Christopher Haster 99:f51358e506c1 71 * @param optname Option identifier
Christopher Haster 89:b1d417383c0d 72 * @param optval Option value
Christopher Haster 89:b1d417383c0d 73 * @param optlen Length of the option value
Christopher Haster 89:b1d417383c0d 74 * @return 0 on success, negative on failure
Christopher Haster 99:f51358e506c1 75 */
Christopher Haster 99:f51358e506c1 76 int setsockopt(int level, int optname, const void *optval, unsigned optlen);
Christopher Haster 99:f51358e506c1 77
Christopher Haster 89:b1d417383c0d 78 /* Get socket options
Christopher Haster 99:f51358e506c1 79 * @param level Option level
Christopher Haster 99:f51358e506c1 80 * @param optname Option identifier
Christopher Haster 99:f51358e506c1 81 * @param optval Buffer where to write option value
Christopher Haster 89:b1d417383c0d 82 * @param optlen Length of the option value
Christopher Haster 89:b1d417383c0d 83 * @return 0 on success, negative on failure
Christopher Haster 99:f51358e506c1 84 */
Christopher Haster 99:f51358e506c1 85 int getsockopt(int level, int optname, void *optval, unsigned *optlen);
Christopher Haster 89:b1d417383c0d 86
Christopher Haster 92:dd5f19874adf 87 /** Register a callback on state change of the socket
Christopher Haster 92:dd5f19874adf 88 * @param callback Function to call on state change
Christopher Haster 92:dd5f19874adf 89 * @note Callback may be called in an interrupt context.
Christopher Haster 92:dd5f19874adf 90 * The callback should not perform long operations
Christopher Haster 92:dd5f19874adf 91 * such as recv or send calls.
Christopher Haster 92:dd5f19874adf 92 */
Christopher Haster 92:dd5f19874adf 93 void attach(FunctionPointer callback);
Christopher Haster 92:dd5f19874adf 94
Christopher Haster 92:dd5f19874adf 95 template <typename T, typename M>
Christopher Haster 92:dd5f19874adf 96 void attach(T *tptr, M mptr) {
Christopher Haster 92:dd5f19874adf 97 attach(FunctionPointer(tptr, mptr));
Christopher Haster 92:dd5f19874adf 98 }
Christopher Haster 92:dd5f19874adf 99
Christopher Haster 89:b1d417383c0d 100 protected:
Christopher Haster 90:0a988e4abb72 101 Socket();
Christopher Haster 90:0a988e4abb72 102 int open(NetworkInterface *iface, nsapi_protocol_t proto);
Christopher Haster 89:b1d417383c0d 103
Christopher Haster 89:b1d417383c0d 104 static void thunk(void *);
Christopher Haster 89:b1d417383c0d 105
Christopher Haster 89:b1d417383c0d 106 NetworkInterface *_iface;
Christopher Haster 89:b1d417383c0d 107 void *_socket;
Christopher Haster 89:b1d417383c0d 108 bool _blocking;
Christopher Haster 89:b1d417383c0d 109 unsigned _timeout;
Christopher Haster 92:dd5f19874adf 110 FunctionPointer _callback;
Christopher Haster 89:b1d417383c0d 111 };
Christopher Haster 89:b1d417383c0d 112
Christopher Haster 89:b1d417383c0d 113 #endif