Open Ldap 에서 query 하기..

어제 책 읽고 다시 만든 ldap query 입니다.

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <lber.h>
#include <ldap.h>

int
main (int argc, char **argv)
{
  LDAP *ld;
  int auth_method = LDAP_AUTH_SIMPLE;
  int desired_version = LDAP_VERSION3;
  char *ldap_host = "[hostname]";
  char *root_dn = "uid=[ldap-user-name],dc=[dc1],dc=[dc2]....";
  char *root_pw = "secret" ;
  char *base = "dc=[dca],dc=[dcb]...";
  char *filter = "[filter string]";
  char *errstring;
  char *dn = NULL;
  char *attr;
  char **vals;

  int i;
  int result;

  BerElement *ber;
  LDAPMessage *msg;
  LDAPMessage *entry;

  if ((ld = ldap_init (ldap_host, LDAP_PORT)) == NULL)
    {
      perror ("ldap_init failed");
      exit (EXIT_FAILURE);
    }

  if (ldap_set_option (ld, LDAP_OPT_PROTOCOL_VERSION, &desired_version) !=
      LDAP_OPT_SUCCESS)
    {
      ldap_perror (ld, "ldap_set_option");
      exit (EXIT_FAILURE);
    }

  if (ldap_bind_s (ld, root_dn, root_pw, auth_method) != LDAP_SUCCESS)
    {
      ldap_perror (ld, "ldap_bind");
      exit (EXIT_FAILURE);
    }

  if (ldap_search_s (ld, base, LDAP_SCOPE_SUBTREE, filter, NULL, 0, &msg)
      != LDAP_SUCCESS)
    {
      ldap_perror (ld, "ldap_search_s");
      exit (EXIT_FAILURE);
    }

  printf ("the number of entries returned was %d\n\n",
	  ldap_count_entries (ld, msg));

  for (entry = ldap_first_entry (ld, msg);
       entry != NULL; entry = ldap_next_entry (ld, entry))
    {
      if ((dn = ldap_get_dn (ld, entry)) != NULL)
	{
	  printf ("Returned dn: %s\n", dn);
	  ldap_memfree (dn);
	}

      for (attr = ldap_first_attribute (ld, entry, &ber);
	   attr != NULL; attr = ldap_next_attribute (ld, entry, ber))
	{
	  if ((vals = ldap_get_values (ld, entry, attr)) != NULL)
	    {
	      for (i = 0; vals[i] != NULL; i++)
		printf ("%s: %s\n", attr, vals[i]);
	      ldap_value_free (vals);
	    }
	  ldap_memfree (attr);
	}
      if (ber != NULL)
	ber_free (ber, 0);
      printf ("\n");
    }
  ldap_msgfree (msg);
  result = ldap_unbind_s (ld);

  if (result != 0)
    {
      fprintf (stderr, "ldap_unbind_s: %s\n", ldap_err2string (result));
      exit (1);
    }
  return 0;
}