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.cpp@108:2e5eccf30a84, 2016-04-20 (annotated)

Committer:
geky
Date:
Wed Apr 20 00:46:23 2016 +0000
Revision:
108:2e5eccf30a84
Parent:
105:2fd212f8da61
Child:
109:5d8bd5752386
Fixe race condition in socket close

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 #include "Socket.h"
Christopher Haster 89:b1d417383c0d 18
Christopher Haster 90:0a988e4abb72 19 Socket::Socket()
Christopher Haster 90:0a988e4abb72 20 : _iface(0)
Christopher Haster 90:0a988e4abb72 21 , _socket(0)
Christopher Haster 89:b1d417383c0d 22 , _blocking(true)
Christopher Haster 89:b1d417383c0d 23 , _timeout(0)
Christopher Haster 89:b1d417383c0d 24 {
Christopher Haster 89:b1d417383c0d 25 }
Christopher Haster 89:b1d417383c0d 26
Christopher Haster 89:b1d417383c0d 27 Socket::~Socket()
Christopher Haster 89:b1d417383c0d 28 {
Christopher Haster 89:b1d417383c0d 29 if (_socket) {
Christopher Haster 91:cad29ce6a01c 30 close();
Christopher Haster 89:b1d417383c0d 31 }
Christopher Haster 89:b1d417383c0d 32 }
Christopher Haster 89:b1d417383c0d 33
Christopher Haster 105:2fd212f8da61 34 int Socket::open(NetworkStack *iface, nsapi_protocol_t proto)
Christopher Haster 90:0a988e4abb72 35 {
Christopher Haster 90:0a988e4abb72 36 _iface = iface;
Christopher Haster 93:65a9f84862f0 37
Christopher Haster 93:65a9f84862f0 38 void *socket;
Christopher Haster 93:65a9f84862f0 39 int err = _iface->socket_open(&socket, proto);
Christopher Haster 93:65a9f84862f0 40 if (err) {
Christopher Haster 93:65a9f84862f0 41 return err;
Christopher Haster 93:65a9f84862f0 42 }
Christopher Haster 93:65a9f84862f0 43
Christopher Haster 93:65a9f84862f0 44 _socket = socket;
Christopher Haster 92:dd5f19874adf 45 _iface->socket_attach(_socket, &Socket::thunk, this);
Christopher Haster 93:65a9f84862f0 46
Christopher Haster 93:65a9f84862f0 47 return 0;
Christopher Haster 90:0a988e4abb72 48 }
Christopher Haster 90:0a988e4abb72 49
Christopher Haster 91:cad29ce6a01c 50 int Socket::close()
Christopher Haster 90:0a988e4abb72 51 {
Christopher Haster 90:0a988e4abb72 52 if (!_socket) {
Christopher Haster 90:0a988e4abb72 53 return 0;
Christopher Haster 90:0a988e4abb72 54 }
geky 108:2e5eccf30a84 55
geky 108:2e5eccf30a84 56 _iface->socket_attach(_socket, 0, 0);
geky 108:2e5eccf30a84 57
geky 108:2e5eccf30a84 58 void *volatile socket = _socket;
Christopher Haster 93:65a9f84862f0 59 _socket = 0;
Christopher Haster 93:65a9f84862f0 60 return _iface->socket_close(socket);
Christopher Haster 90:0a988e4abb72 61 }
Christopher Haster 90:0a988e4abb72 62
Christopher Haster 98:0f614f1d0398 63 int Socket::bind(uint16_t port)
Christopher Haster 98:0f614f1d0398 64 {
Christopher Haster 98:0f614f1d0398 65 SocketAddress addr(0, port);
Christopher Haster 98:0f614f1d0398 66 return bind(addr);
Christopher Haster 98:0f614f1d0398 67 }
Christopher Haster 98:0f614f1d0398 68
Christopher Haster 98:0f614f1d0398 69 int Socket::bind(const char *address, uint16_t port)
Christopher Haster 98:0f614f1d0398 70 {
Christopher Haster 98:0f614f1d0398 71 SocketAddress addr(address, port);
Christopher Haster 98:0f614f1d0398 72 return bind(addr);
Christopher Haster 98:0f614f1d0398 73 }
Christopher Haster 98:0f614f1d0398 74
Christopher Haster 98:0f614f1d0398 75 int Socket::bind(const SocketAddress &address)
Christopher Haster 98:0f614f1d0398 76 {
Christopher Haster 98:0f614f1d0398 77 if (!_socket) {
Christopher Haster 98:0f614f1d0398 78 return NSAPI_ERROR_NO_SOCKET;
Christopher Haster 98:0f614f1d0398 79 }
Christopher Haster 98:0f614f1d0398 80
Christopher Haster 98:0f614f1d0398 81 return _iface->socket_bind(_socket, address);
Christopher Haster 98:0f614f1d0398 82 }
Christopher Haster 98:0f614f1d0398 83
Christopher Haster 89:b1d417383c0d 84 void Socket::set_blocking(bool blocking)
Christopher Haster 89:b1d417383c0d 85 {
Christopher Haster 89:b1d417383c0d 86 _blocking = blocking;
Christopher Haster 89:b1d417383c0d 87 }
Christopher Haster 89:b1d417383c0d 88
Christopher Haster 89:b1d417383c0d 89 void Socket::set_timeout(unsigned timeout)
Christopher Haster 89:b1d417383c0d 90 {
Christopher Haster 89:b1d417383c0d 91 _timeout = timeout;
Christopher Haster 89:b1d417383c0d 92 }
Christopher Haster 89:b1d417383c0d 93
Christopher Haster 99:f51358e506c1 94 int Socket::setsockopt(int level, int optname, const void *optval, unsigned optlen)
Christopher Haster 89:b1d417383c0d 95 {
Christopher Haster 89:b1d417383c0d 96 if (!_socket) {
Christopher Haster 89:b1d417383c0d 97 return NSAPI_ERROR_NO_SOCKET;
Christopher Haster 89:b1d417383c0d 98 }
Christopher Haster 89:b1d417383c0d 99
Christopher Haster 99:f51358e506c1 100 return _iface->setsockopt(_socket, level, optname, optval, optlen);
Christopher Haster 89:b1d417383c0d 101 }
Christopher Haster 89:b1d417383c0d 102
Christopher Haster 99:f51358e506c1 103 int Socket::getsockopt(int level, int optname, void *optval, unsigned *optlen)
Christopher Haster 89:b1d417383c0d 104 {
Christopher Haster 89:b1d417383c0d 105 if (!_socket) {
Christopher Haster 89:b1d417383c0d 106 return NSAPI_ERROR_NO_SOCKET;
Christopher Haster 89:b1d417383c0d 107 }
Christopher Haster 89:b1d417383c0d 108
Christopher Haster 99:f51358e506c1 109 return _iface->getsockopt(_socket, level, optname, optval, optlen);
Christopher Haster 99:f51358e506c1 110
Christopher Haster 89:b1d417383c0d 111 }
Christopher Haster 89:b1d417383c0d 112
Christopher Haster 92:dd5f19874adf 113 void Socket::thunk(void *data)
Christopher Haster 89:b1d417383c0d 114 {
Christopher Haster 92:dd5f19874adf 115 Socket *self = (Socket *)data;
Christopher Haster 92:dd5f19874adf 116 if (self->_callback) {
Christopher Haster 92:dd5f19874adf 117 self->_callback();
Christopher Haster 92:dd5f19874adf 118 }
Christopher Haster 89:b1d417383c0d 119 }
Christopher Haster 92:dd5f19874adf 120
Christopher Haster 92:dd5f19874adf 121 void Socket::attach(FunctionPointer callback)
Christopher Haster 92:dd5f19874adf 122 {
Christopher Haster 92:dd5f19874adf 123 _callback = callback;
Christopher Haster 92:dd5f19874adf 124 }