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/* Copyright (C) 2009 jonathon jongsma
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <glibmm/object.h>
#include <giomm/inetaddress.h>
#include <giomm/cancellable.h>
#include <giomm/srvtarget.h>
#include <giomm/asyncresult.h>

_DEFS(giomm,gio)
_PINCLUDE(glibmm/private/object_p.h)


// Forward declarations for classes in the Glib namespace.
namespace Glib
{

class VariantContainerBase;

}

namespace Gio
{

_WRAP_ENUM(ResolverRecordType, GResolverRecordType)

/** Asynchronous and cancellable DNS resolver
 *
 * Resolver provides cancellable synchronous and asynchronous DNS resolution,
 * for hostnames (lookup_by_address(), lookup_by_name() and their async
 * variants) and SRV (service) records (lookup_service()).
 *
 * NetworkAddress and NetworkService provide wrappers around Resolver
 * functionality that also implement SocketConnectable, making it easy to
 * connect to a remote host/service.
 *
 * @newin{2,24}
 * @ingroup NetworkIO
 */
class Resolver
: public Glib::Object
{
  _CLASS_GOBJECT(Resolver, GResolver, G_RESOLVER, Glib::Object, GObject)

protected:

public:
  static Glib::RefPtr<Resolver> get_default();
  _IGNORE(g_resolver_get_default)
  static void set_default(const Glib::RefPtr<Resolver>& resolver);
  _IGNORE(g_resolver_set_default)

  // g_resolver_free_addresses is just a C convenience function
  _IGNORE(g_resolver_free_addresses)

#m4 _CONVERSION(`GList*',`Glib::ListHandle< Glib::RefPtr<InetAddress> >',`$2($3, Glib::OWNERSHIP_DEEP)')
  _WRAP_METHOD(Glib::ListHandle< Glib::RefPtr<InetAddress> > lookup_by_name(const Glib::ustring& hostname, const Glib::RefPtr<Cancellable>& cancellable{?}), g_resolver_lookup_by_name, errthrow)

  /** Begins asynchronously resolving hostname to determine its associated IP address(es), and eventually calls @a slot, which must call
   * lookup_by_name_finish() to get the result. See lookup_by_name() for more details.
   *
   * @param hostname The hostname to look up.
   * @param slot A callback slot to call after the resolution completes.
   * @param cancellable A Cancellable object which can be used to cancel the operation.
   */
  void lookup_by_name_async(const Glib::ustring& hostname, const SlotAsyncReady& slot, const Glib::RefPtr<Cancellable>& cancellable);

  /** Begins asynchronously resolving hostname to determine its associated IP address(es), and eventually calls @a slot, which must call
   * lookup_by_name_finish() to get the result. See lookup_by_name() for more details.
   *
   * @param hostname The hostname to look up.
   * @param slot A callback slot to call after the resolution completes.
   */
  void lookup_by_name_async(const Glib::ustring& hostname, const SlotAsyncReady& slot);
  _IGNORE(g_resolver_lookup_by_name_async)

  _WRAP_METHOD(Glib::ListHandle< Glib::RefPtr<InetAddress> > lookup_by_name_finish(const Glib::RefPtr<AsyncResult>& result), g_resolver_lookup_by_name_finish, errthrow)

  _WRAP_METHOD(Glib::ustring lookup_by_address(const Glib::RefPtr<InetAddress>& address, const Glib::RefPtr<Cancellable>& cancellable{?}), g_resolver_lookup_by_address, errthrow)

  /** Begins asynchronously reverse-resolving an address to determine its associated hostname, and eventually calls callback, which must call
   * lookup_by_address_finish() to get the final result.
   *
   * @param address The address to reverse-resolve.
   * @param slot A callback slot to call after the resolution completes.
   * @param cancellable A Cancellable object which can be used to cancel the operation.
   */
  void lookup_by_address_async(const Glib::RefPtr<InetAddress>& address, const SlotAsyncReady& slot, const Glib::RefPtr<Cancellable>& cancellable);

  /** Begins asynchronously reverse-resolving an address to determine its associated hostname, and eventually calls callback, which must call
   * lookup_by_address_finish() to get the final result.
   *
   * @param address The address to reverse-resolve.
   * @param slot A callback slot to call after the resolution completes.
   */
  void lookup_by_address_async(const Glib::RefPtr<InetAddress>& address, const SlotAsyncReady& slot);
  _IGNORE(g_resolver_lookup_by_address_async)

  _WRAP_METHOD(Glib::ustring lookup_by_address_finish(const Glib::RefPtr<AsyncResult>& result), g_resolver_lookup_by_address_finish, errthrow)

#m4 _CONVERSION(`GList*',`ListHandle_SrvTarget',`$2($3, Glib::OWNERSHIP_DEEP)')
  _WRAP_METHOD(ListHandle_SrvTarget lookup_service(const Glib::ustring& service, const Glib::ustring& protocol, const Glib::ustring& domain, const Glib::RefPtr<Cancellable>& cancellable{?}), g_resolver_lookup_service, errthrow)

  /** Begins asynchronously performing a DNS SRV lookup for the given service and protocol in the given domain, and eventually calls callback,
   * which must call lookup_service_finish() to get the final result. See glookup_service() for more details.
   *
   * @param service The service type to look up (eg, "ldap").
   * @param protocol The networking protocol to use for service (eg, "tcp")
   * @param domain The DNS domain to look up the service in.
   * @param slot A callback slot to call after the resolution completes.
   * @param cancellable A Cancellable object which can be used to cancel the operation.
   */
  void lookup_service_async(const Glib::ustring& service, const Glib::ustring& protocol, const Glib::ustring& domain, const SlotAsyncReady& slot, const Glib::RefPtr<Cancellable>& cancellable);

  /** Begins asynchronously performing a DNS SRV lookup for the given service and protocol in the given domain, and eventually calls callback,
   * which must call lookup_service_finish() to get the final result. See glookup_service() for more details.
   *
   * @param service The service type to look up (eg, "ldap").
   * @param protocol The networking protocol to use for service (eg, "tcp")
   * @param domain The DNS domain to look up the service in.
   * @param slot A callback slot to call after the resolution completes.
   */
  void lookup_service_async(const Glib::ustring& service, const Glib::ustring& protocol, const Glib::ustring& domain, const SlotAsyncReady& slot);
  _IGNORE(g_resolver_lookup_service_async)

  _WRAP_METHOD(ListHandle_SrvTarget lookup_service_finish(const Glib::RefPtr<AsyncResult>& result), g_resolver_lookup_service_finish, errthrow)

#m4 _CONVERSION(`GList*',`std::vector<Glib::VariantContainerBase>',`Glib::ListHandler<Glib::VariantContainerBase>::list_to_vector($3, Glib::OWNERSHIP_DEEP)')

  _WRAP_METHOD(std::vector<Glib::VariantContainerBase> lookup_records(const Glib::ustring& rrname, ResolverRecordType record_type, const Glib::RefPtr<Cancellable>& cancellable{?}), g_resolver_lookup_records, errthrow)

  /** Begins asynchronously performing a DNS lookup for the given @a rrname,
   * and eventually calls @a slot, which must call lookup_records_finish() to
   * get the final result. See lookup_records() for more details.
   *
   * @param rrname The DNS name to lookup the record for.
   * @param record_type The type of DNS record to lookup.
   * @param cancellable A Cancellable.
   * @param slot The slot to call after the resolution completes.
   * @newin{2,36}
   */
  void lookup_records_async(const Glib::ustring& rrname,
    ResolverRecordType record_type, const SlotAsyncReady& slot,
    const Glib::RefPtr<Cancellable>& cancellable);
  _IGNORE(g_resolver_lookup_records_async)

  /// A non-cancellable version of lookup_records_async().
  void lookup_records_async(const Glib::ustring& rrname,
    ResolverRecordType record_type, const SlotAsyncReady& slot);

  _WRAP_METHOD(std::vector<Glib::VariantContainerBase> lookup_records_finish(const Glib::RefPtr<AsyncResult>& result), g_resolver_lookup_records_finish, errthrow)

  //TODO: Remove no_default_handler when we can break ABI:
  _WRAP_SIGNAL(void reload(), reload, no_default_handler)
};

std::string hostname_to_ascii (const Glib::ustring& hostname);
Glib::ustring hostname_to_unicode (const Glib::ustring& hostname);
bool hostname_is_non_ascii (const Glib::ustring& hostname);
bool hostname_is_ascii_encoded (const Glib::ustring& hostname);
bool hostname_is_ip_address (const Glib::ustring& hostname);

} // namespace Gio