mbed official / Socket

mbed socket API

Dependents:   EthernetInterface EthernetInterface_RSF EthernetInterface EthernetInterface ... more

Deprecated

This is an mbed 2 sockets library. For mbed 5, network sockets have been revised to better support additional network stacks and thread safety here.

UDPSocket.cpp@10:d24738f4ef99, 2012-07-31 (annotated)

Committer:
emilmont
Date:
Tue Jul 31 11:50:55 2012 +0000
Revision:
10:d24738f4ef99
Parent:
6:cd2e5559786d
Child:
11:3d83c348fb8b
Add explicit setting of socket blocking/non-blocking mode and timeout

Who changed what in which revision?

UserRevisionLine numberNew contents of line
donatien 0:1f77255a22f5 1 /* Copyright (C) 2012 mbed.org, MIT License
donatien 0:1f77255a22f5 2 *
donatien 0:1f77255a22f5 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
donatien 0:1f77255a22f5 4 * and associated documentation files (the "Software"), to deal in the Software without restriction,
donatien 0:1f77255a22f5 5 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
donatien 0:1f77255a22f5 6 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
donatien 0:1f77255a22f5 7 * furnished to do so, subject to the following conditions:
donatien 0:1f77255a22f5 8 *
donatien 0:1f77255a22f5 9 * The above copyright notice and this permission notice shall be included in all copies or
donatien 0:1f77255a22f5 10 * substantial portions of the Software.
donatien 0:1f77255a22f5 11 *
donatien 0:1f77255a22f5 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
donatien 0:1f77255a22f5 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
donatien 0:1f77255a22f5 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
donatien 0:1f77255a22f5 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
donatien 0:1f77255a22f5 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
donatien 0:1f77255a22f5 17 */
donatien 0:1f77255a22f5 18
emilmont 5:300e7ad2dc1d 19 #include "Socket/UDPSocket.h"
donatien 0:1f77255a22f5 20
donatien 0:1f77255a22f5 21 #include <cstring>
donatien 0:1f77255a22f5 22
donatien 0:1f77255a22f5 23 using std::memset;
donatien 0:1f77255a22f5 24
emilmont 3:e6474399e057 25 UDPSocket::UDPSocket() {
donatien 0:1f77255a22f5 26 }
donatien 0:1f77255a22f5 27
emilmont 5:300e7ad2dc1d 28 int UDPSocket::init(void) {
emilmont 5:300e7ad2dc1d 29 return init_socket(SOCK_DGRAM);
emilmont 5:300e7ad2dc1d 30 }
emilmont 5:300e7ad2dc1d 31
emilmont 3:e6474399e057 32 // Server initialization
emilmont 3:e6474399e057 33 int UDPSocket::bind(int port) {
emilmont 5:300e7ad2dc1d 34 if (init_socket(SOCK_DGRAM) < 0)
emilmont 3:e6474399e057 35 return -1;
emilmont 3:e6474399e057 36
emilmont 3:e6474399e057 37 struct sockaddr_in localHost;
emilmont 3:e6474399e057 38 std::memset(&localHost, 0, sizeof(localHost));
emilmont 3:e6474399e057 39
emilmont 3:e6474399e057 40 localHost.sin_family = AF_INET;
emilmont 3:e6474399e057 41 localHost.sin_port = htons(port);
emilmont 3:e6474399e057 42 localHost.sin_addr.s_addr = INADDR_ANY;
emilmont 3:e6474399e057 43
emilmont 3:e6474399e057 44 if (lwip_bind(_sock_fd, (const struct sockaddr *) &localHost, sizeof(localHost)) < 0) {
emilmont 3:e6474399e057 45 close();
emilmont 3:e6474399e057 46 return -1;
emilmont 3:e6474399e057 47 }
emilmont 3:e6474399e057 48
emilmont 3:e6474399e057 49 return 0;
donatien 0:1f77255a22f5 50 }
donatien 0:1f77255a22f5 51
donatien 0:1f77255a22f5 52 // -1 if unsuccessful, else number of bytes written
emilmont 10:d24738f4ef99 53 int UDPSocket::sendTo(UDPPacket& packet) {
emilmont 3:e6474399e057 54 if (_sock_fd < 0)
emilmont 3:e6474399e057 55 return -1;
emilmont 3:e6474399e057 56
emilmont 10:d24738f4ef99 57 if (!_blocking) {
emilmont 10:d24738f4ef99 58 TimeInterval timeout(_timeout);
emilmont 6:cd2e5559786d 59 if (wait_writable(timeout) != 0)
emilmont 5:300e7ad2dc1d 60 return -1;
donatien 0:1f77255a22f5 61 }
emilmont 3:e6474399e057 62
emilmont 5:300e7ad2dc1d 63 return lwip_sendto(_sock_fd, packet._buffer, packet._length, 0, (const struct sockaddr *) &packet._remoteHost, sizeof(packet._remoteHost));
donatien 0:1f77255a22f5 64 }
donatien 0:1f77255a22f5 65
donatien 0:1f77255a22f5 66 // -1 if unsuccessful, else number of bytes received
emilmont 10:d24738f4ef99 67 int UDPSocket::receiveFrom(UDPPacket& packet) {
emilmont 3:e6474399e057 68 if (_sock_fd < 0)
emilmont 3:e6474399e057 69 return -1;
emilmont 3:e6474399e057 70
emilmont 10:d24738f4ef99 71 if (!_blocking) {
emilmont 10:d24738f4ef99 72 TimeInterval timeout(_timeout);
emilmont 6:cd2e5559786d 73 if (wait_readable(timeout) != 0)
emilmont 5:300e7ad2dc1d 74 return -1;
emilmont 5:300e7ad2dc1d 75 }
donatien 0:1f77255a22f5 76
emilmont 5:300e7ad2dc1d 77 packet.reset_address();
emilmont 5:300e7ad2dc1d 78 socklen_t remoteHostLen = sizeof(packet._remoteHost);
emilmont 5:300e7ad2dc1d 79 return lwip_recvfrom(_sock_fd, packet._buffer, packet._length, 0, (struct sockaddr*) &packet._remoteHost, &remoteHostLen);
donatien 0:1f77255a22f5 80 }
donatien 0:1f77255a22f5 81
emilmont 3:e6474399e057 82 UDPSocket::~UDPSocket() {
emilmont 3:e6474399e057 83 close(); //Don't want to leak
donatien 0:1f77255a22f5 84 }