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Dependencies:   F7_Ethernet WebSocketClient mbed mcp3008

Fork of Nucleo_F746ZG_Ethernet by Dieter Graef

F7_Ethernet/Socket/UDPSocket.cpp@0:f9b6112278fe, 2016-06-18 (annotated)

Committer:
DieterGraef
Date:
Sat Jun 18 10:49:12 2016 +0000
Revision:
0:f9b6112278fe
Ethernet for the NUCLEO STM32F746 Board Testprogram uses DHCP and NTP to set the clock

Who changed what in which revision?

UserRevisionLine numberNew contents of line
DieterGraef 0:f9b6112278fe 1 /* Copyright (C) 2012 mbed.org, MIT License
DieterGraef 0:f9b6112278fe 2 *
DieterGraef 0:f9b6112278fe 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
DieterGraef 0:f9b6112278fe 4 * and associated documentation files (the "Software"), to deal in the Software without restriction,
DieterGraef 0:f9b6112278fe 5 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
DieterGraef 0:f9b6112278fe 6 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
DieterGraef 0:f9b6112278fe 7 * furnished to do so, subject to the following conditions:
DieterGraef 0:f9b6112278fe 8 *
DieterGraef 0:f9b6112278fe 9 * The above copyright notice and this permission notice shall be included in all copies or
DieterGraef 0:f9b6112278fe 10 * substantial portions of the Software.
DieterGraef 0:f9b6112278fe 11 *
DieterGraef 0:f9b6112278fe 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
DieterGraef 0:f9b6112278fe 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
DieterGraef 0:f9b6112278fe 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DieterGraef 0:f9b6112278fe 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
DieterGraef 0:f9b6112278fe 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
DieterGraef 0:f9b6112278fe 17 */
DieterGraef 0:f9b6112278fe 18
DieterGraef 0:f9b6112278fe 19 #include "Socket/UDPSocket.h"
DieterGraef 0:f9b6112278fe 20
DieterGraef 0:f9b6112278fe 21 #include <cstring>
DieterGraef 0:f9b6112278fe 22
DieterGraef 0:f9b6112278fe 23 using std::memset;
DieterGraef 0:f9b6112278fe 24
DieterGraef 0:f9b6112278fe 25 UDPSocket::UDPSocket() {
DieterGraef 0:f9b6112278fe 26 }
DieterGraef 0:f9b6112278fe 27
DieterGraef 0:f9b6112278fe 28 int UDPSocket::init(void) {
DieterGraef 0:f9b6112278fe 29 return init_socket(SOCK_DGRAM);
DieterGraef 0:f9b6112278fe 30 }
DieterGraef 0:f9b6112278fe 31
DieterGraef 0:f9b6112278fe 32 // Server initialization
DieterGraef 0:f9b6112278fe 33 int UDPSocket::bind(int port) {
DieterGraef 0:f9b6112278fe 34 if (init_socket(SOCK_DGRAM) < 0)
DieterGraef 0:f9b6112278fe 35 return -1;
DieterGraef 0:f9b6112278fe 36
DieterGraef 0:f9b6112278fe 37 struct sockaddr_in localHost;
DieterGraef 0:f9b6112278fe 38 std::memset(&localHost, 0, sizeof(localHost));
DieterGraef 0:f9b6112278fe 39
DieterGraef 0:f9b6112278fe 40 localHost.sin_family = AF_INET;
DieterGraef 0:f9b6112278fe 41 localHost.sin_port = htons(port);
DieterGraef 0:f9b6112278fe 42 localHost.sin_addr.s_addr = INADDR_ANY;
DieterGraef 0:f9b6112278fe 43
DieterGraef 0:f9b6112278fe 44 if (lwip_bind(_sock_fd, (const struct sockaddr *) &localHost, sizeof(localHost)) < 0) {
DieterGraef 0:f9b6112278fe 45 close();
DieterGraef 0:f9b6112278fe 46 return -1;
DieterGraef 0:f9b6112278fe 47 }
DieterGraef 0:f9b6112278fe 48
DieterGraef 0:f9b6112278fe 49 return 0;
DieterGraef 0:f9b6112278fe 50 }
DieterGraef 0:f9b6112278fe 51
DieterGraef 0:f9b6112278fe 52 int UDPSocket::join_multicast_group(const char* address) {
DieterGraef 0:f9b6112278fe 53 struct ip_mreq mreq;
DieterGraef 0:f9b6112278fe 54
DieterGraef 0:f9b6112278fe 55 // Set up group address
DieterGraef 0:f9b6112278fe 56 mreq.imr_multiaddr.s_addr = inet_addr(address);
DieterGraef 0:f9b6112278fe 57 mreq.imr_interface.s_addr = htonl(INADDR_ANY);
DieterGraef 0:f9b6112278fe 58
DieterGraef 0:f9b6112278fe 59 return set_option(IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq));
DieterGraef 0:f9b6112278fe 60 }
DieterGraef 0:f9b6112278fe 61
DieterGraef 0:f9b6112278fe 62 int UDPSocket::set_broadcasting(bool broadcast) {
DieterGraef 0:f9b6112278fe 63 int option = (broadcast) ? (1) : (0);
DieterGraef 0:f9b6112278fe 64 return set_option(SOL_SOCKET, SO_BROADCAST, &option, sizeof(option));
DieterGraef 0:f9b6112278fe 65 }
DieterGraef 0:f9b6112278fe 66
DieterGraef 0:f9b6112278fe 67 // -1 if unsuccessful, else number of bytes written
DieterGraef 0:f9b6112278fe 68 int UDPSocket::sendTo(Endpoint &remote, char *packet, int length) {
DieterGraef 0:f9b6112278fe 69 if (_sock_fd < 0)
DieterGraef 0:f9b6112278fe 70 return -1;
DieterGraef 0:f9b6112278fe 71
DieterGraef 0:f9b6112278fe 72 if (!_blocking) {
DieterGraef 0:f9b6112278fe 73 TimeInterval timeout(_timeout);
DieterGraef 0:f9b6112278fe 74 if (wait_writable(timeout) != 0)
DieterGraef 0:f9b6112278fe 75 return 0;
DieterGraef 0:f9b6112278fe 76 }
DieterGraef 0:f9b6112278fe 77
DieterGraef 0:f9b6112278fe 78 return lwip_sendto(_sock_fd, packet, length, 0, (const struct sockaddr *) &remote._remoteHost, sizeof(remote._remoteHost));
DieterGraef 0:f9b6112278fe 79 }
DieterGraef 0:f9b6112278fe 80
DieterGraef 0:f9b6112278fe 81 // -1 if unsuccessful, else number of bytes received
DieterGraef 0:f9b6112278fe 82 int UDPSocket::receiveFrom(Endpoint &remote, char *buffer, int length) {
DieterGraef 0:f9b6112278fe 83 if (_sock_fd < 0)
DieterGraef 0:f9b6112278fe 84 return -1;
DieterGraef 0:f9b6112278fe 85
DieterGraef 0:f9b6112278fe 86 if (!_blocking) {
DieterGraef 0:f9b6112278fe 87 TimeInterval timeout(_timeout);
DieterGraef 0:f9b6112278fe 88 if (wait_readable(timeout) != 0)
DieterGraef 0:f9b6112278fe 89 return 0;
DieterGraef 0:f9b6112278fe 90 }
DieterGraef 0:f9b6112278fe 91 remote.reset_address();
DieterGraef 0:f9b6112278fe 92 socklen_t remoteHostLen = sizeof(remote._remoteHost);
DieterGraef 0:f9b6112278fe 93 return lwip_recvfrom(_sock_fd, buffer, length, 0, (struct sockaddr*) &remote._remoteHost, &remoteHostLen);
DieterGraef 0:f9b6112278fe 94 }