Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

features/netsocket/UDPSocket.h@1:3deb71413561, 2017-07-20 (annotated)

Committer:
xuaner
Date:
Thu Jul 20 14:26:57 2017 +0000
Revision:
1:3deb71413561
Parent:
0:f269e3021894 
mbed_os

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elessair 0:f269e3021894 1
elessair 0:f269e3021894 2 /** \addtogroup netsocket */
elessair 0:f269e3021894 3 /** @{*/
elessair 0:f269e3021894 4 /* UDPSocket
elessair 0:f269e3021894 5 * Copyright (c) 2015 ARM Limited
elessair 0:f269e3021894 6 *
elessair 0:f269e3021894 7 * Licensed under the Apache License, Version 2.0 (the "License");
elessair 0:f269e3021894 8 * you may not use this file except in compliance with the License.
elessair 0:f269e3021894 9 * You may obtain a copy of the License at
elessair 0:f269e3021894 10 *
elessair 0:f269e3021894 11 * http://www.apache.org/licenses/LICENSE-2.0
elessair 0:f269e3021894 12 *
elessair 0:f269e3021894 13 * Unless required by applicable law or agreed to in writing, software
elessair 0:f269e3021894 14 * distributed under the License is distributed on an "AS IS" BASIS,
elessair 0:f269e3021894 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elessair 0:f269e3021894 16 * See the License for the specific language governing permissions and
elessair 0:f269e3021894 17 * limitations under the License.
elessair 0:f269e3021894 18 */
elessair 0:f269e3021894 19
elessair 0:f269e3021894 20 #ifndef UDPSOCKET_H
elessair 0:f269e3021894 21 #define UDPSOCKET_H
elessair 0:f269e3021894 22
elessair 0:f269e3021894 23 #include "netsocket/Socket.h"
elessair 0:f269e3021894 24 #include "netsocket/NetworkStack.h"
elessair 0:f269e3021894 25 #include "netsocket/NetworkInterface.h"
elessair 0:f269e3021894 26 #include "rtos/Semaphore.h"
elessair 0:f269e3021894 27
elessair 0:f269e3021894 28
elessair 0:f269e3021894 29 /** UDP socket
elessair 0:f269e3021894 30 */
elessair 0:f269e3021894 31 class UDPSocket : public Socket {
elessair 0:f269e3021894 32 public:
elessair 0:f269e3021894 33 /** Create an uninitialized socket
elessair 0:f269e3021894 34 *
elessair 0:f269e3021894 35 * Must call open to initialize the socket on a network stack.
elessair 0:f269e3021894 36 */
elessair 0:f269e3021894 37 UDPSocket();
elessair 0:f269e3021894 38
elessair 0:f269e3021894 39 /** Create a socket on a network interface
elessair 0:f269e3021894 40 *
elessair 0:f269e3021894 41 * Creates and opens a socket on the network stack of the given
elessair 0:f269e3021894 42 * network interface.
elessair 0:f269e3021894 43 *
elessair 0:f269e3021894 44 * @param stack Network stack as target for socket
elessair 0:f269e3021894 45 */
elessair 0:f269e3021894 46 template <typename S>
elessair 0:f269e3021894 47 UDPSocket(S *stack)
elessair 0:f269e3021894 48 : _pending(0), _read_sem(0), _write_sem(0),
elessair 0:f269e3021894 49 _read_in_progress(false), _write_in_progress(false)
elessair 0:f269e3021894 50 {
elessair 0:f269e3021894 51 open(stack);
elessair 0:f269e3021894 52 }
elessair 0:f269e3021894 53
elessair 0:f269e3021894 54 /** Destroy a socket
elessair 0:f269e3021894 55 *
elessair 0:f269e3021894 56 * Closes socket if the socket is still open
elessair 0:f269e3021894 57 */
elessair 0:f269e3021894 58 virtual ~UDPSocket();
elessair 0:f269e3021894 59
elessair 0:f269e3021894 60 /** Send a packet over a UDP socket
elessair 0:f269e3021894 61 *
elessair 0:f269e3021894 62 * Sends data to the specified address specified by either a domain name
elessair 0:f269e3021894 63 * or an IP address and port. Returns the number of bytes sent from the
elessair 0:f269e3021894 64 * buffer.
elessair 0:f269e3021894 65 *
elessair 0:f269e3021894 66 * By default, sendto blocks until data is sent. If socket is set to
elessair 0:f269e3021894 67 * non-blocking or times out, NSAPI_ERROR_WOULD_BLOCK is returned
elessair 0:f269e3021894 68 * immediately.
elessair 0:f269e3021894 69 *
elessair 0:f269e3021894 70 * @param host Hostname of the remote host
elessair 0:f269e3021894 71 * @param port Port of the remote host
elessair 0:f269e3021894 72 * @param data Buffer of data to send to the host
elessair 0:f269e3021894 73 * @param size Size of the buffer in bytes
elessair 0:f269e3021894 74 * @return Number of sent bytes on success, negative error
elessair 0:f269e3021894 75 * code on failure
elessair 0:f269e3021894 76 */
elessair 0:f269e3021894 77 int sendto(const char *host, uint16_t port, const void *data, unsigned size);
elessair 0:f269e3021894 78
elessair 0:f269e3021894 79 /** Send a packet over a UDP socket
elessair 0:f269e3021894 80 *
elessair 0:f269e3021894 81 * Sends data to the specified address. Returns the number of bytes
elessair 0:f269e3021894 82 * sent from the buffer.
elessair 0:f269e3021894 83 *
elessair 0:f269e3021894 84 * By default, sendto blocks until data is sent. If socket is set to
elessair 0:f269e3021894 85 * non-blocking or times out, NSAPI_ERROR_WOULD_BLOCK is returned
elessair 0:f269e3021894 86 * immediately.
elessair 0:f269e3021894 87 *
elessair 0:f269e3021894 88 * @param address The SocketAddress of the remote host
elessair 0:f269e3021894 89 * @param data Buffer of data to send to the host
elessair 0:f269e3021894 90 * @param size Size of the buffer in bytes
elessair 0:f269e3021894 91 * @return Number of sent bytes on success, negative error
elessair 0:f269e3021894 92 * code on failure
elessair 0:f269e3021894 93 */
elessair 0:f269e3021894 94 int sendto(const SocketAddress &address, const void *data, unsigned size);
elessair 0:f269e3021894 95
elessair 0:f269e3021894 96 /** Receive a packet over a UDP socket
elessair 0:f269e3021894 97 *
elessair 0:f269e3021894 98 * Receives data and stores the source address in address if address
elessair 0:f269e3021894 99 * is not NULL. Returns the number of bytes received into the buffer.
elessair 0:f269e3021894 100 *
elessair 0:f269e3021894 101 * By default, recvfrom blocks until data is sent. If socket is set to
elessair 0:f269e3021894 102 * non-blocking or times out, NSAPI_ERROR_WOULD_BLOCK is returned
elessair 0:f269e3021894 103 * immediately.
elessair 0:f269e3021894 104 *
elessair 0:f269e3021894 105 * @param address Destination for the source address or NULL
elessair 0:f269e3021894 106 * @param data Destination buffer for data received from the host
elessair 0:f269e3021894 107 * @param size Size of the buffer in bytes
elessair 0:f269e3021894 108 * @return Number of received bytes on success, negative error
elessair 0:f269e3021894 109 * code on failure
elessair 0:f269e3021894 110 */
elessair 0:f269e3021894 111 int recvfrom(SocketAddress *address, void *data, unsigned size);
elessair 0:f269e3021894 112
elessair 0:f269e3021894 113 protected:
elessair 0:f269e3021894 114 virtual nsapi_protocol_t get_proto();
elessair 0:f269e3021894 115 virtual void event();
elessair 0:f269e3021894 116
elessair 0:f269e3021894 117 volatile unsigned _pending;
elessair 0:f269e3021894 118 rtos::Semaphore _read_sem;
elessair 0:f269e3021894 119 rtos::Semaphore _write_sem;
elessair 0:f269e3021894 120 bool _read_in_progress;
elessair 0:f269e3021894 121 bool _write_in_progress;
elessair 0:f269e3021894 122 };
elessair 0:f269e3021894 123
elessair 0:f269e3021894 124
elessair 0:f269e3021894 125 #endif
elessair 0:f269e3021894 126
elessair 0:f269e3021894 127 /** @}*/