#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#define MYPORT 3900
//#define MYPORT 5432

main()
{
  int sd,ns;
  char buf[256];
  struct sockaddr sockaddr;
  int fromlen;
  char myname[32];

  struct servent	*sp;
  struct hostent	*hp;
  struct sockaddr_in	sin;

  sd = socket(AF_INET,SOCK_DGRAM,0);

  /*proper war to access gethostbyname. */
  if (gethostname(myname,sizeof(myname)-1)<0) {
    perror("gethosbyname problem");
    exit(1);
  }
  printf("My hostname is: %s\n",myname);
  hp = gethostbyname(myname);
  bzero((char *)&sin,sizeof(sin));
  bcopy(hp->h_addr,(char *)&sin.sin_addr,hp->h_length);
  // forgot the following two lines, no wonder it didn't work!!
  sin.sin_port = htons(MYPORT);
  sin.sin_family = hp->h_addrtype;
  
  if (bind(sd,(struct sockaddr *)&sin,sizeof(sin)) == -1) {
    perror("bind error");
    exit(1);
  }

  for(;;) {
    recvfrom(sd,buf,sizeof(buf),0,&sockaddr,&fromlen);
    printf("Server received %s\n",buf);
  }
}