bool UDPSocket::confEndpoint(Endpoint & ep) { char * host; char cmd[30]; if (!endpoint_configured) { host = ep.get_address(); if (host[0] != '\0') { // set host sprintf(cmd, "set i h %s\r", host); if (!wifi->sendCommand(cmd, "AOK")) return false; // set remote port sprintf(cmd, "set i r %d\r", ep.get_port()); if (!wifi->sendCommand(cmd, "AOK")) return false; wifi->exit(); endpoint_configured = true; return true; } } return true; }
int main() { bool result = false; EthernetInterface eth; eth.init(); //Use DHCP eth.connect(); printf("UDP client IP Address is %s\n", eth.getIPAddress()); UDPSocket sock; sock.init(); Endpoint nist; nist.set_address(HTTP_SERVER_NAME, HTTP_SERVER_PORT); char out_buffer[] = "plop"; // Does not matter sock.sendTo(nist, out_buffer, sizeof(out_buffer)); union { char in_buffer_tab[4]; unsigned int in_buffer_uint; }; const int n = sock.receiveFrom(nist, in_buffer_tab, sizeof(in_buffer_tab)); if (n > 0) { result = true; const unsigned int timeRes = ntohl(in_buffer_uint); const float years = timeRes / 60.0 / 60.0 / 24.0 / 365; printf("UDP: Received %d bytes from server %s on port %d\r\n", n, nist.get_address(), nist.get_port()); printf("UDP: %u seconds since 01/01/1900 00:00 GMT ... %s\r\n", timeRes, timeRes > 0 ? "[OK]" : "[FAIL]"); printf("UDP: %.2f years since 01/01/1900 00:00 GMT ... %s\r\n", years, timeRes > YEARS_TO_PASS ? "[OK]" : "[FAIL]"); if (years < YEARS_TO_PASS) { result = false; } } sock.close(); eth.disconnect(); notify_completion(result); return 0; }