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

int main( int argc, char **argv )
{
  struct sockaddr_in to;
  char *buf;
  int sd, ret;
					
  sd = socket( AF_INET, SOCK_DGRAM, 0 );
  if( sd <= 0 ) {
    perror( "socket" );
    exit( -1 );
  }
  bzero( &to, sizeof(to) );
  to.sin_family = AF_INET;
  inet_aton( "127.0.0.1", &to.sin_addr );
  to.sin_port = htons( (unsigned short)5555 );
  buf = "Hallo vom User-Space";
  ret = sendto( sd, buf, strlen(buf)+1, 0, (struct sockaddr *)&to,
		sizeof(to) );
  close( sd );
  return 0;
}