95 lines
3.1 KiB
C++
95 lines
3.1 KiB
C++
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/* Copyright (C) 2012 mbed.org, MIT License
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
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* and associated documentation files (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge, publish, distribute,
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* sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or
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* substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
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* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "Socket/UDPSocket.h"
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#include <cstring>
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using std::memset;
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UDPSocket::UDPSocket() {
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}
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int UDPSocket::init(void) {
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return init_socket(SOCK_DGRAM);
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}
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// Server initialization
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int UDPSocket::bind(int port) {
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if (init_socket(SOCK_DGRAM) < 0)
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return -1;
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struct sockaddr_in localHost;
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std::memset(&localHost, 0, sizeof(localHost));
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localHost.sin_family = AF_INET;
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localHost.sin_port = htons(port);
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localHost.sin_addr.s_addr = INADDR_ANY;
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if (lwip_bind(_sock_fd, (const struct sockaddr *) &localHost, sizeof(localHost)) < 0) {
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close();
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return -1;
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}
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return 0;
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}
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int UDPSocket::join_multicast_group(const char* address) {
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struct ip_mreq mreq;
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// Set up group address
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mreq.imr_multiaddr.s_addr = inet_addr(address);
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mreq.imr_interface.s_addr = htonl(INADDR_ANY);
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return set_option(IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq));
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}
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int UDPSocket::set_broadcasting(bool broadcast) {
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int option = (broadcast) ? (1) : (0);
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return set_option(SOL_SOCKET, SO_BROADCAST, &option, sizeof(option));
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}
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// -1 if unsuccessful, else number of bytes written
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int UDPSocket::sendTo(Endpoint &remote, char *packet, int length) {
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if (_sock_fd < 0)
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return -1;
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if (!_blocking) {
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TimeInterval timeout(_timeout);
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if (wait_writable(timeout) != 0)
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return 0;
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}
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return lwip_sendto(_sock_fd, packet, length, 0, (const struct sockaddr *) &remote._remoteHost, sizeof(remote._remoteHost));
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}
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// -1 if unsuccessful, else number of bytes received
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int UDPSocket::receiveFrom(Endpoint &remote, char *buffer, int length) {
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if (_sock_fd < 0)
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return -1;
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if (!_blocking) {
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TimeInterval timeout(_timeout);
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if (wait_readable(timeout) != 0)
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return 0;
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}
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remote.reset_address();
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socklen_t remoteHostLen = sizeof(remote._remoteHost);
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return lwip_recvfrom(_sock_fd, buffer, length, 0, (struct sockaddr*) &remote._remoteHost, &remoteHostLen);
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}
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