libgupnp/gupnp-windows-context-manager.c

   1 /*
   2  * Copyright (C) 2009, 2010 Jens Georg
   3  * Copyright (C) 2009 Nokia Corporation.
   4  * Copyright (C) 2006, 2007, 2008 OpenedHand Ltd.
   5  *
   6  * Author: Zeeshan Ali (Khattak) <zeeshanak@gnome.org>
   7  *         Jorn Baayen <jorn@openedhand.com>
   8  *         Jens Georg <mail@jensge.org>
   9  *
  10  * This library is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Library General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2 of the License, or (at your option) any later version.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Library General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Library General Public
  21  * License along with this library; if not, write to the
  22  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23  * Boston, MA 02111-1307, USA.
  24  */
  25
  26 /**
  27  * SECTION:gupnp-windows-context-manager
  28  * @short_description: Windows-specific implementation of #GUPnPContextManager.
  29  */
  30
  31 #include <config.h>
  32 #include <string.h>
  33 #ifndef _WIN32_WINNT
  34 #define _WIN32_WINNT 0x0502
  35 #endif
  36 #include <winsock2.h>
  37 #include <ws2tcpip.h>
  38 #include <iphlpapi.h>
  39
  40 #include "gupnp-windows-context-manager.h"
  41 #include "gupnp-context.h"
  42
  43 G_DEFINE_TYPE (GUPnPWindowsContextManager,
  44                gupnp_windows_context_manager,
  45                GUPNP_TYPE_SIMPLE_CONTEXT_MANAGER);
  46
  47 /*
  48  * Create a context for all network interfaces that are up.
  49  */
  50 static GList *
  51 gupnp_windows_context_manager_get_interfaces
  52                                         (GUPnPSimpleContextManager *manager)
  53 {
  54         GList *interfaces = NULL;
  55         ULONG flags = GAA_FLAG_INCLUDE_PREFIX |
  56                       GAA_FLAG_SKIP_DNS_SERVER |
  57                       GAA_FLAG_SKIP_MULTICAST;
  58         /* use 15k buffer initially as documented in MSDN */
  59         DWORD size = 0x3C00;
  60         DWORD ret;
  61         PIP_ADAPTER_ADDRESSES adapters_addresses;
  62         PIP_ADAPTER_ADDRESSES adapter;
  63
  64         do {
  65                 adapters_addresses = (PIP_ADAPTER_ADDRESSES) g_malloc0 (size);
  66                 ret = GetAdaptersAddresses (AF_UNSPEC,
  67                                             flags,
  68                                             NULL,
  69                                             adapters_addresses,
  70                                             &size);
  71                 if (ret == ERROR_BUFFER_OVERFLOW) {
  72                         g_free (adapters_addresses);
  73                 }
  74         } while (ret == ERROR_BUFFER_OVERFLOW);
  75
  76         if (ret != ERROR_SUCCESS)
  77                 return NULL;
  78
  79         for (adapter = adapters_addresses;
  80              adapter != NULL;
  81              adapter = adapter->Next) {
  82                 if (adapter->FirstUnicastAddress == NULL)
  83                         continue;
  84                 if (adapter->OperStatus != IfOperStatusUp)
  85                         continue;
  86                 interfaces = g_list_append (interfaces,
  87                                             g_strdup (adapter->AdapterName));
  88         }
  89
  90         return interfaces;
  91 }
  92
  93 static void
  94 gupnp_windows_context_manager_init (GUPnPWindowsContextManager *manager)
  95 {
  96 }
  97
  98 static void
  99 gupnp_windows_context_manager_class_init (GUPnPWindowsContextManagerClass *klass)
 100 {
 101         GUPnPSimpleContextManagerClass *parent_class;
 102
 103         parent_class = GUPNP_SIMPLE_CONTEXT_MANAGER_CLASS (klass);
 104         parent_class->get_interfaces =
 105                                 gupnp_windows_context_manager_get_interfaces;
 106 }