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@19:434906b5b977, 2013-08-19 (annotated)

Committer:
bogdanm
Date:
Mon Aug 19 18:38:18 2013 +0300
Revision:
19:434906b5b977
Parent:
18:d56496360fc9 
Sync with official mbed library release 66

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
emilmont 16:2d471deff212 52 int UDPSocket::join_multicast_group(const char* address) {
emilmont 16:2d471deff212 53 struct ip_mreq mreq;
emilmont 16:2d471deff212 54
emilmont 16:2d471deff212 55 // Set up group address
emilmont 16:2d471deff212 56 mreq.imr_multiaddr.s_addr = inet_addr(address);
emilmont 16:2d471deff212 57 mreq.imr_interface.s_addr = htonl(INADDR_ANY);
emilmont 16:2d471deff212 58
emilmont 16:2d471deff212 59 return set_option(IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq));
emilmont 16:2d471deff212 60 }
emilmont 16:2d471deff212 61
emilmont 18:d56496360fc9 62 int UDPSocket::set_broadcasting(bool broadcast) {
emilmont 18:d56496360fc9 63 int option = (broadcast) ? (1) : (0);
emilmont 16:2d471deff212 64 return set_option(SOL_SOCKET, SO_BROADCAST, &option, sizeof(option));
emilmont 16:2d471deff212 65 }
emilmont 16:2d471deff212 66
donatien 0:1f77255a22f5 67 // -1 if unsuccessful, else number of bytes written
emilmont 11:3d83c348fb8b 68 int UDPSocket::sendTo(Endpoint &remote, char *packet, int length) {
emilmont 3:e6474399e057 69 if (_sock_fd < 0)
emilmont 3:e6474399e057 70 return -1;
emilmont 3:e6474399e057 71
emilmont 10:d24738f4ef99 72 if (!_blocking) {
emilmont 10:d24738f4ef99 73 TimeInterval timeout(_timeout);
emilmont 6:cd2e5559786d 74 if (wait_writable(timeout) != 0)
emilmont 11:3d83c348fb8b 75 return 0;
donatien 0:1f77255a22f5 76 }
emilmont 3:e6474399e057 77
emilmont 11:3d83c348fb8b 78 return lwip_sendto(_sock_fd, packet, length, 0, (const struct sockaddr *) &remote._remoteHost, sizeof(remote._remoteHost));
donatien 0:1f77255a22f5 79 }
donatien 0:1f77255a22f5 80
donatien 0:1f77255a22f5 81 // -1 if unsuccessful, else number of bytes received
emilmont 11:3d83c348fb8b 82 int UDPSocket::receiveFrom(Endpoint &remote, char *buffer, int length) {
emilmont 3:e6474399e057 83 if (_sock_fd < 0)
emilmont 3:e6474399e057 84 return -1;
emilmont 3:e6474399e057 85
emilmont 10:d24738f4ef99 86 if (!_blocking) {
emilmont 10:d24738f4ef99 87 TimeInterval timeout(_timeout);
emilmont 6:cd2e5559786d 88 if (wait_readable(timeout) != 0)
emilmont 11:3d83c348fb8b 89 return 0;
emilmont 5:300e7ad2dc1d 90 }
emilmont 11:3d83c348fb8b 91 remote.reset_address();
emilmont 11:3d83c348fb8b 92 socklen_t remoteHostLen = sizeof(remote._remoteHost);
emilmont 11:3d83c348fb8b 93 return lwip_recvfrom(_sock_fd, buffer, length, 0, (struct sockaddr*) &remote._remoteHost, &remoteHostLen);
donatien 0:1f77255a22f5 94 }