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libcares/adig.c  view on Meta::CPAN

 * fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both that copyright
 * notice and this permission notice appear in supporting
 * documentation, and that the name of M.I.T. not be used in
 * advertising or publicity pertaining to distribution of the
 * software without specific, written prior permission.
 * M.I.T. makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is"
 * without express or implied warranty.
 */

#include "ares_setup.h"

#ifdef HAVE_NETINET_IN_H
#  include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
#  include <arpa/inet.h>
#endif
#ifdef HAVE_NETDB_H
#  include <netdb.h>
#endif
#ifdef HAVE_ARPA_NAMESER_H
#  include <arpa/nameser.h>
#else
#  include "nameser.h"
#endif
#ifdef HAVE_ARPA_NAMESER_COMPAT_H
#  include <arpa/nameser_compat.h>
#endif

#ifdef HAVE_STRINGS_H
#  include <strings.h>
#endif

#include "ares.h"
#include "ares_dns.h"
#include "ares_getopt.h"
#include "ares_nowarn.h"

#ifndef HAVE_STRDUP
#  include "ares_strdup.h"
#  define strdup(ptr) ares_strdup(ptr)
#endif

#ifndef HAVE_STRCASECMP
#  include "ares_strcasecmp.h"
#  define strcasecmp(p1,p2) ares_strcasecmp(p1,p2)
#endif

#ifndef HAVE_STRNCASECMP
#  include "ares_strcasecmp.h"
#  define strncasecmp(p1,p2,n) ares_strncasecmp(p1,p2,n)
#endif

#ifdef WATT32
#undef WIN32  /* Redefined in MingW headers */
#endif

#ifndef T_SRV
#  define T_SRV     33 /* Server selection */
#endif
#ifndef T_NAPTR
#  define T_NAPTR   35 /* Naming authority pointer */
#endif
#ifndef T_DS
#  define T_DS      43 /* Delegation Signer (RFC4034) */
#endif
#ifndef T_SSHFP
#  define T_SSHFP   44 /* SSH Key Fingerprint (RFC4255) */
#endif
#ifndef T_RRSIG
#  define T_RRSIG   46 /* Resource Record Signature (RFC4034) */
#endif
#ifndef T_NSEC
#  define T_NSEC    47 /* Next Secure (RFC4034) */
#endif
#ifndef T_DNSKEY
#  define T_DNSKEY  48 /* DNS Public Key (RFC4034) */
#endif

struct nv {
  const char *name;
  int value;
};

static const struct nv flags[] = {
  { "usevc",            ARES_FLAG_USEVC },
  { "primary",          ARES_FLAG_PRIMARY },
  { "igntc",            ARES_FLAG_IGNTC },
  { "norecurse",        ARES_FLAG_NORECURSE },
  { "stayopen",         ARES_FLAG_STAYOPEN },
  { "noaliases",        ARES_FLAG_NOALIASES }
};
static const int nflags = sizeof(flags) / sizeof(flags[0]);

static const struct nv classes[] = {
  { "IN",       C_IN },
  { "CHAOS",    C_CHAOS },
  { "HS",       C_HS },
  { "ANY",      C_ANY }
};
static const int nclasses = sizeof(classes) / sizeof(classes[0]);

static const struct nv types[] = {
  { "A",        T_A },
  { "NS",       T_NS },
  { "MD",       T_MD },
  { "MF",       T_MF },
  { "CNAME",    T_CNAME },
  { "SOA",      T_SOA },
  { "MB",       T_MB },
  { "MG",       T_MG },
  { "MR",       T_MR },
  { "NULL",     T_NULL },
  { "WKS",      T_WKS },
  { "PTR",      T_PTR },
  { "HINFO",    T_HINFO },
  { "MINFO",    T_MINFO },
  { "MX",       T_MX },
  { "TXT",      T_TXT },

libcares/adig.c  view on Meta::CPAN

          optmask |= ARES_OPT_TCP_PORT;
          break;

        case 'U':
          /* Set the UDP port number. */
          if (!ISDIGIT(*optarg))
            usage();
          options.udp_port = (unsigned short)strtol(optarg, NULL, 0);
          optmask |= ARES_OPT_UDP_PORT;
          break;
        }
    }
  argc -= optind;
  argv += optind;
  if (argc == 0)
    usage();

  status = ares_init_options(&channel, &options, optmask);

  if (status != ARES_SUCCESS)
    {
      fprintf(stderr, "ares_init_options: %s\n",
              ares_strerror(status));
      return 1;
    }

  if(servers)
    {
      status = ares_set_servers(channel, servers);
      destroy_addr_list(servers);
      if (status != ARES_SUCCESS)
        {
          fprintf(stderr, "ares_init_options: %s\n",
                  ares_strerror(status));
          return 1;
        }
    }

  /* Initiate the queries, one per command-line argument.  If there is
   * only one query to do, supply NULL as the callback argument;
   * otherwise, supply the query name as an argument so we can
   * distinguish responses for the user when printing them out.
   */
  if (argc == 1)
    ares_query(channel, *argv, dnsclass, type, callback, (char *) NULL);
  else
    {
      for (; *argv; argv++)
        ares_query(channel, *argv, dnsclass, type, callback, *argv);
    }

  /* Wait for all queries to complete. */
  for (;;)
    {
      FD_ZERO(&read_fds);
      FD_ZERO(&write_fds);
      nfds = ares_fds(channel, &read_fds, &write_fds);
      if (nfds == 0)
        break;
      tvp = ares_timeout(channel, NULL, &tv);
      count = select(nfds, &read_fds, &write_fds, NULL, tvp);
      if (count < 0 && (status = SOCKERRNO) != EINVAL)
        {
          printf("select fail: %d", status);
          return 1;
        }
      ares_process(channel, &read_fds, &write_fds);
    }

  ares_destroy(channel);

  ares_library_cleanup();

#ifdef USE_WINSOCK
  WSACleanup();
#endif

  return 0;
}

static void callback(void *arg, int status, int timeouts,
                     unsigned char *abuf, int alen)
{
  char *name = (char *) arg;
  int id, qr, opcode, aa, tc, rd, ra, rcode;
  unsigned int qdcount, ancount, nscount, arcount, i;
  const unsigned char *aptr;

  (void) timeouts;

  /* Display the query name if given. */
  if (name)
    printf("Answer for query %s:\n", name);

  /* Display an error message if there was an error, but only stop if
   * we actually didn't get an answer buffer.
   */
  if (status != ARES_SUCCESS)
    {
      printf("%s\n", ares_strerror(status));
      if (!abuf)
        return;
    }

  /* Won't happen, but check anyway, for safety. */
  if (alen < HFIXEDSZ)
    return;

  /* Parse the answer header. */
  id = DNS_HEADER_QID(abuf);
  qr = DNS_HEADER_QR(abuf);
  opcode = DNS_HEADER_OPCODE(abuf);
  aa = DNS_HEADER_AA(abuf);
  tc = DNS_HEADER_TC(abuf);
  rd = DNS_HEADER_RD(abuf);
  ra = DNS_HEADER_RA(abuf);
  rcode = DNS_HEADER_RCODE(abuf);
  qdcount = DNS_HEADER_QDCOUNT(abuf);
  ancount = DNS_HEADER_ANCOUNT(abuf);
  nscount = DNS_HEADER_NSCOUNT(abuf);
  arcount = DNS_HEADER_ARCOUNT(abuf);

  /* Display the answer header. */
  printf("id: %d\n", id);