#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>

main()
{
	int sock = socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP);
	struct sockaddr_in ClientAddr;
	memset(&ClientAddr, 0, sizeof(ClientAddr));
	ClientAddr.sin_family = AF_INET;
	ClientAddr.sin_addr.s_addr = inet_addr("227.234.253.9");
	int port = 15922;
	ClientAddr.sin_port = htons((short) port);
	char str[] = "Hello, world";
	sendto(sock, str, strlen(str), 0, (struct sockaddr *)&ClientAddr, sizeof(ClientAddr));
	close(sock);
}