SiSK / EthernetInterface

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Socket/UDPSocket.cpp@0:d7bd7384a37c, 2016-12-07 (annotated)

Committer:
grzemich
Date:
Wed Dec 07 23:47:50 2016 +0000
Revision:
0:d7bd7384a37c
dgd

Who changed what in which revision?

UserRevisionLine numberNew contents of line
grzemich 0:d7bd7384a37c 1 /* Copyright (C) 2012 mbed.org, MIT License
grzemich 0:d7bd7384a37c 2 *
grzemich 0:d7bd7384a37c 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
grzemich 0:d7bd7384a37c 4 * and associated documentation files (the "Software"), to deal in the Software without restriction,
grzemich 0:d7bd7384a37c 5 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
grzemich 0:d7bd7384a37c 6 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
grzemich 0:d7bd7384a37c 7 * furnished to do so, subject to the following conditions:
grzemich 0:d7bd7384a37c 8 *
grzemich 0:d7bd7384a37c 9 * The above copyright notice and this permission notice shall be included in all copies or
grzemich 0:d7bd7384a37c 10 * substantial portions of the Software.
grzemich 0:d7bd7384a37c 11 *
grzemich 0:d7bd7384a37c 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
grzemich 0:d7bd7384a37c 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
grzemich 0:d7bd7384a37c 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
grzemich 0:d7bd7384a37c 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
grzemich 0:d7bd7384a37c 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
grzemich 0:d7bd7384a37c 17 */
grzemich 0:d7bd7384a37c 18
grzemich 0:d7bd7384a37c 19 #include "Socket/UDPSocket.h"
grzemich 0:d7bd7384a37c 20
grzemich 0:d7bd7384a37c 21 #include <cstring>
grzemich 0:d7bd7384a37c 22
grzemich 0:d7bd7384a37c 23 using std::memset;
grzemich 0:d7bd7384a37c 24
grzemich 0:d7bd7384a37c 25 UDPSocket::UDPSocket() {
grzemich 0:d7bd7384a37c 26 }
grzemich 0:d7bd7384a37c 27
grzemich 0:d7bd7384a37c 28 int UDPSocket::init(void) {
grzemich 0:d7bd7384a37c 29 return init_socket(SOCK_DGRAM);
grzemich 0:d7bd7384a37c 30 }
grzemich 0:d7bd7384a37c 31
grzemich 0:d7bd7384a37c 32 // Server initialization
grzemich 0:d7bd7384a37c 33 int UDPSocket::bind(int port) {
grzemich 0:d7bd7384a37c 34 if (init_socket(SOCK_DGRAM) < 0)
grzemich 0:d7bd7384a37c 35 return -1;
grzemich 0:d7bd7384a37c 36
grzemich 0:d7bd7384a37c 37 struct sockaddr_in localHost;
grzemich 0:d7bd7384a37c 38 std::memset(&localHost, 0, sizeof(localHost));
grzemich 0:d7bd7384a37c 39
grzemich 0:d7bd7384a37c 40 localHost.sin_family = AF_INET;
grzemich 0:d7bd7384a37c 41 localHost.sin_port = htons(port);
grzemich 0:d7bd7384a37c 42 localHost.sin_addr.s_addr = INADDR_ANY;
grzemich 0:d7bd7384a37c 43
grzemich 0:d7bd7384a37c 44 if (lwip_bind(_sock_fd, (const struct sockaddr *) &localHost, sizeof(localHost)) < 0) {
grzemich 0:d7bd7384a37c 45 close();
grzemich 0:d7bd7384a37c 46 return -1;
grzemich 0:d7bd7384a37c 47 }
grzemich 0:d7bd7384a37c 48
grzemich 0:d7bd7384a37c 49 return 0;
grzemich 0:d7bd7384a37c 50 }
grzemich 0:d7bd7384a37c 51
grzemich 0:d7bd7384a37c 52 int UDPSocket::join_multicast_group(const char* address) {
grzemich 0:d7bd7384a37c 53 struct ip_mreq mreq;
grzemich 0:d7bd7384a37c 54
grzemich 0:d7bd7384a37c 55 // Set up group address
grzemich 0:d7bd7384a37c 56 mreq.imr_multiaddr.s_addr = inet_addr(address);
grzemich 0:d7bd7384a37c 57 mreq.imr_interface.s_addr = htonl(INADDR_ANY);
grzemich 0:d7bd7384a37c 58
grzemich 0:d7bd7384a37c 59 return set_option(IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq));
grzemich 0:d7bd7384a37c 60 }
grzemich 0:d7bd7384a37c 61
grzemich 0:d7bd7384a37c 62 int UDPSocket::set_broadcasting(bool broadcast) {
grzemich 0:d7bd7384a37c 63 int option = (broadcast) ? (1) : (0);
grzemich 0:d7bd7384a37c 64 return set_option(SOL_SOCKET, SO_BROADCAST, &option, sizeof(option));
grzemich 0:d7bd7384a37c 65 }
grzemich 0:d7bd7384a37c 66
grzemich 0:d7bd7384a37c 67 // -1 if unsuccessful, else number of bytes written
grzemich 0:d7bd7384a37c 68 int UDPSocket::sendTo(Endpoint &remote, char *packet, int length) {
grzemich 0:d7bd7384a37c 69 if (_sock_fd < 0)
grzemich 0:d7bd7384a37c 70 return -1;
grzemich 0:d7bd7384a37c 71
grzemich 0:d7bd7384a37c 72 if (!_blocking) {
grzemich 0:d7bd7384a37c 73 TimeInterval timeout(_timeout);
grzemich 0:d7bd7384a37c 74 if (wait_writable(timeout) != 0)
grzemich 0:d7bd7384a37c 75 return 0;
grzemich 0:d7bd7384a37c 76 }
grzemich 0:d7bd7384a37c 77
grzemich 0:d7bd7384a37c 78 return lwip_sendto(_sock_fd, packet, length, 0, (const struct sockaddr *) &remote._remoteHost, sizeof(remote._remoteHost));
grzemich 0:d7bd7384a37c 79 }
grzemich 0:d7bd7384a37c 80
grzemich 0:d7bd7384a37c 81 // -1 if unsuccessful, else number of bytes received
grzemich 0:d7bd7384a37c 82 int UDPSocket::receiveFrom(Endpoint &remote, char *buffer, int length) {
grzemich 0:d7bd7384a37c 83 if (_sock_fd < 0)
grzemich 0:d7bd7384a37c 84 return -1;
grzemich 0:d7bd7384a37c 85
grzemich 0:d7bd7384a37c 86 if (!_blocking) {
grzemich 0:d7bd7384a37c 87 TimeInterval timeout(_timeout);
grzemich 0:d7bd7384a37c 88 if (wait_readable(timeout) != 0)
grzemich 0:d7bd7384a37c 89 return 0;
grzemich 0:d7bd7384a37c 90 }
grzemich 0:d7bd7384a37c 91 remote.reset_address();
grzemich 0:d7bd7384a37c 92 socklen_t remoteHostLen = sizeof(remote._remoteHost);
grzemich 0:d7bd7384a37c 93 return lwip_recvfrom(_sock_fd, buffer, length, 0, (struct sockaddr*) &remote._remoteHost, &remoteHostLen);
grzemich 0:d7bd7384a37c 94 }