typedef union {

   HEADER qb1;

   char qb2[PACKETSZ];

} querybuf;

 

int getinfo(

char *name,

char *domain,

int   type)

 

   HEADER   *hp;

   char     *eom, *cp;

   querybuf buf, answer;

   int      n;

   int      ancount, nscount, arcount, qdcount;

   char     host[2*MAXDNAME+2];

 

   if (domain == NULL)

      (void)sprintf(host, "%.*s", MAXDNAME, name);

   else

      (void)sprintf(host, "%.*s.%.*s", MAXDNAME, name, MAXDNAME, domain);

 

   printf("Querying name: %s\n", host);

 

   n = res_mkquery(QUERY, host, C_IN, type, (char *)NULL, 0, NULL,

      (char *)&buf, sizeof(buf));

   if (n < 0) {

      if (_res.options & RES_DEBUG)

         printf("res_mkquery failed\n");

      h_errno = NO_RECOVERY;

      return(0);

   }

   n = res_send((char *)&buf, n, (char *)&answer, sizeof(answer));

   if (n < 0) {

      if (_res.options & RES_DEBUG)

         printf("res_send failed\n");

      h_errno = TRY_AGAIN;

      return (0);

   }

 

   eom = (char *)&answer + n;

   hp = (HEADER *)&answer;

   ancount = ntohs(hp->ancount);

   qdcount = ntohs(hp->qdcount);

   nscount = ntohs(hp->nscount);

   arcount = ntohs(hp->arcount);

   printf("Ans %d -  QDs %d - NSs %d - ARs %d \n",

           ancount, qdcount, nscount, arcount);

   return(n);

 

void main(

int argc,

char **argv)

   int status;

 

   res_init();

 

   _res.options |= RES_USEVC;

   _res.retry = 1;

   _res.retrans = 15;

   _res.options &= ~RES_RECURSE;

   _res.options |= RES_DEBUG;

 

   if (argc < 3)

      status = getinfo(argv[1], "cs.clemson.edu.", T_A);

   else

      status = getinfo(argv[1], argv[2], T_A);

 

   printf("%d bytes returned \n", status);