#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <errno.h>
#include <string.h>
#include <arpa/inet.h>
#include <unistd.h>

int main (void)
{
	char str [] = "150.208.12.199";

	int sock = socket(AF_INET, SOCK_DGRAM, 0);
	if (sock == -1){
	  printf("socket() error:%s\n", strerror(errno));
	  return -1;
	}
	  
	struct sockaddr_in servaddr;
	servaddr.sin_family = AF_INET;
	servaddr.sin_port = htons(53);
	servaddr.sin_addr.s_addr = inet_addr(str);

	char buf[512];
	//fill in buffer

	int ret = sendto(sock, buf, strlen(buf), 0, (const struct sockaddr*)&servaddr, sizeof(servaddr));
	if( ret == -1 )
	  printf("send:%s\n", strerror(errno));
	else if( ret != strlen(buf) )
	  printf("only %d sent!\n", ret);
	
	if( close(sock) == - 1 )
	  printf("close:%s\n", strerror(errno));
}