Use openldap.h on OpenLDAP 2.4.48

OpenLDAP 2.4.48 added openldap.h, which defines ldap_init_fd. Use the
header file with 2.4.48 and define the function for older versions.

The patch also cleans up #include. All OpenLDAP includes are now in
common.h and use global includes ``#include <ldap.h>`` instead of local
includes ``#include "ldap.h"``.

Fixes: https://github.com/python-ldap/python-ldap/issues/353
See: https://bugs.openldap.org/show_bug.cgi?id=8671
Signed-off-by: Christian Heimes <cheimes@redhat.com>

Modules/LDAPObject.h

@@ -5,12 +5,6 @@
 
 #include "common.h"
 
-#include "lber.h"
-#include "ldap.h"
-#if LDAP_API_VERSION < 2040
-#error Current python-ldap requires OpenLDAP 2.4.x
-#endif
-
 #if PYTHON_API_VERSION < 1007
 typedef PyObject *_threadstate;
 #else

Modules/berval.h

@@ -4,7 +4,6 @@
 #define __h_berval
 
 #include "common.h"
-#include "lber.h"
 
 PyObject *LDAPberval_to_object(const struct berval *bv);
 PyObject *LDAPberval_to_unicode_object(const struct berval *bv);

Modules/common.h

@@ -12,6 +12,33 @@
 #include "config.h"
 #endif
 
+#include <lber.h>
+#include <ldap.h>
+#include <ldap_features.h>
+
+#if LDAP_API_VERSION < 2040
+#error Current python-ldap requires OpenLDAP 2.4.x
+#endif
+
+#if LDAP_VENDOR_VERSION >= 20448
+  /* openldap.h with ldap_init_fd() was introduced in 2.4.48
+   * see https://bugs.openldap.org/show_bug.cgi?id=8671
+   */
+#include <openldap.h>
+#ifndef HAVE_LDAP_INIT_FD
+#define HAVE_LDAP_INIT_FD
+#endif
+#else
+  /* ldap_init_fd() has been around for a very long time
+   * SSSD has been defining the function for a while, so it's probably OK.
+   */
+#define LDAP_PROTO_TCP 1
+#define LDAP_PROTO_UDP 2
+#define LDAP_PROTO_IPC 3
+extern int ldap_init_fd(ber_socket_t fd, int proto, LDAP_CONST char *url,
+                        LDAP **ldp);
+#endif
+
 #if defined(MS_WINDOWS)
 #include <winsock.h>
 #else /* unix */

Modules/constants.c

@@ -4,8 +4,6 @@
 #include "common.h"
 #include "constants.h"
 #include "ldapcontrol.h"
-#include "lber.h"
-#include "ldap.h"
 
 /* the base exception class */
 

Modules/constants.h

@@ -4,8 +4,6 @@
 #define __h_constants_
 
 #include "common.h"
-#include "lber.h"
-#include "ldap.h"
 
 extern int LDAPinit_constants(PyObject *m);
 extern PyObject *LDAPconstant(int);

Modules/functions.c

@@ -32,20 +32,7 @@ l_ldap_initialize(PyObject *unused, PyObject *args)
 
 #ifdef HAVE_LDAP_INIT_FD
 
-/* initialize_fd(fileno, url)
- *
- * ldap_init_fd() is not a private API but it's not in a public header either
- * SSSD has been using the function for a while, so it's probably OK.
- */
-
-#ifndef LDAP_PROTO_TCP
-#define LDAP_PROTO_TCP 1
-#define LDAP_PROTO_UDP 2
-#define LDAP_PROTO_IPC 3
-#endif
-
-extern int
-  ldap_init_fd(ber_socket_t fd, int proto, LDAP_CONST char *url, LDAP **ldp);
+/* initialize_fd(fileno, url) */
 
 static PyObject *
 l_ldap_initialize_fd(PyObject *unused, PyObject *args)

Modules/ldapcontrol.c

@@ -6,8 +6,6 @@
 #include "berval.h"
 #include "constants.h"
 
-#include "lber.h"
-
 /* Prints to stdout the contents of an array of LDAPControl objects */
 
 /* XXX: This is a debugging tool, and the printf generates some warnings

Modules/ldapcontrol.h

@@ -4,7 +4,6 @@
 #define __h_ldapcontrol
 
 #include "common.h"
-#include "ldap.h"
 
 void LDAPinit_control(PyObject *d);
 void LDAPControl_List_DEL(LDAPControl **);

Modules/message.h

@@ -4,8 +4,6 @@
 #define __h_message
 
 #include "common.h"
-#include "lber.h"
-#include "ldap.h"
 
 extern PyObject *LDAPmessage_to_python(LDAP *ld, LDAPMessage *m, int add_ctrls,
                                        int add_intermediates);