tools/supplicant-dbus.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2009  Intel Corporation. All rights reserved.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <errno.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <dbus/dbus.h>
  30
  31 #include "supplicant-dbus.h"
  32
  33 #define TIMEOUT 5000
  34
  35 static DBusConnection *connection;
  36
  37 void supplicant_dbus_setup(DBusConnection *conn)
  38 {
  39         connection = conn;
  40 }
  41
  42 void supplicant_dbus_array_foreach(DBusMessageIter *iter,
  43                                 supplicant_dbus_array_function function,
  44                                                         void *user_data)
  45 {
  46         DBusMessageIter entry;
  47
  48         if (dbus_message_iter_get_arg_type(iter) != DBUS_TYPE_ARRAY)
  49                 return;
  50
  51         dbus_message_iter_recurse(iter, &entry);
  52
  53         while (dbus_message_iter_get_arg_type(&entry) != DBUS_TYPE_INVALID) {
  54                 if (function != NULL)
  55                         function(&entry, user_data);
  56
  57                 dbus_message_iter_next(&entry);
  58         }
  59 }
  60
  61 void supplicant_dbus_property_foreach(DBusMessageIter *iter,
  62                                 supplicant_dbus_property_function function,
  63                                                         void *user_data)
  64 {
  65         DBusMessageIter dict;
  66
  67         if (dbus_message_iter_get_arg_type(iter) != DBUS_TYPE_ARRAY)
  68                 return;
  69
  70         dbus_message_iter_recurse(iter, &dict);
  71
  72         while (dbus_message_iter_get_arg_type(&dict) == DBUS_TYPE_DICT_ENTRY) {
  73                 DBusMessageIter entry, value;
  74                 const char *key;
  75
  76                 dbus_message_iter_recurse(&dict, &entry);
  77
  78                 if (dbus_message_iter_get_arg_type(&entry) != DBUS_TYPE_STRING)
  79                         return;
  80
  81                 dbus_message_iter_get_basic(&entry, &key);
  82                 dbus_message_iter_next(&entry);
  83
  84                 if (dbus_message_iter_get_arg_type(&entry) != DBUS_TYPE_VARIANT)
  85                         return;
  86
  87                 dbus_message_iter_recurse(&entry, &value);
  88
  89                 if (key != NULL) {
  90                         if (strcmp(key, "Properties") == 0)
  91                                 supplicant_dbus_property_foreach(&value,
  92                                                         function, user_data);
  93                         else if (function != NULL)
  94                                 function(key, &value, user_data);
  95                 }
  96
  97                 dbus_message_iter_next(&dict);
  98         }
  99 }
 100
 101 struct property_get_data {
 102         supplicant_dbus_property_function function;
 103         void *user_data;
 104 };
 105
 106 static void property_get_all_reply(DBusPendingCall *call, void *user_data)
 107 {
 108         struct property_get_data *data = user_data;
 109         DBusMessage *reply;
 110         DBusMessageIter iter;
 111
 112         reply = dbus_pending_call_steal_reply(call);
 113         if (reply == NULL)
 114                 return;
 115
 116         if (dbus_message_get_type(reply) == DBUS_MESSAGE_TYPE_ERROR)
 117                 goto done;
 118
 119         if (dbus_message_iter_init(reply, &iter) == FALSE)
 120                 goto done;
 121
 122         supplicant_dbus_property_foreach(&iter, data->function,
 123                                                         data->user_data);
 124
 125         if (data->function != NULL)
 126                 data->function(NULL, NULL, data->user_data);
 127
 128 done:
 129         dbus_message_unref(reply);
 130 }
 131
 132 int supplicant_dbus_property_get_all(const char *path, const char *interface,
 133                                 supplicant_dbus_property_function function,
 134                                                         void *user_data)
 135 {
 136         struct property_get_data *data;
 137         DBusMessage *message;
 138         DBusPendingCall *call;
 139
 140         if (path == NULL || interface == NULL)
 141                 return -EINVAL;
 142
 143         data = dbus_malloc0(sizeof(*data));
 144         if (data == NULL)
 145                 return -ENOMEM;
 146
 147         message = dbus_message_new_method_call(SUPPLICANT_SERVICE, path,
 148                                         DBUS_INTERFACE_PROPERTIES, "GetAll");
 149         if (message == NULL) {
 150                 dbus_free(data);
 151                 return -ENOMEM;
 152         }
 153
 154         dbus_message_set_auto_start(message, FALSE);
 155
 156         dbus_message_append_args(message, DBUS_TYPE_STRING, &interface, NULL);
 157
 158         if (dbus_connection_send_with_reply(connection, message,
 159                                                 &call, TIMEOUT) == FALSE) {
 160                 dbus_message_unref(message);
 161                 dbus_free(data);
 162                 return -EIO;
 163         }
 164
 165         if (call == NULL) {
 166                 dbus_message_unref(message);
 167                 dbus_free(data);
 168                 return -EIO;
 169         }
 170
 171         data->function = function;
 172         data->user_data = user_data;
 173
 174         dbus_pending_call_set_notify(call, property_get_all_reply,
 175                                                         data, dbus_free);
 176
 177         dbus_message_unref(message);
 178
 179         return 0;
 180 }
 181
 182 struct property_set_data {
 183         supplicant_dbus_result_function function;
 184         void *user_data;
 185 };
 186
 187 static void property_set_reply(DBusPendingCall *call, void *user_data)
 188 {
 189         struct property_set_data *data = user_data;
 190         DBusMessage *reply;
 191         DBusMessageIter iter;
 192         const char *error;
 193
 194         reply = dbus_pending_call_steal_reply(call);
 195         if (reply == NULL)
 196                 return;
 197
 198         if (dbus_message_get_type(reply) == DBUS_MESSAGE_TYPE_ERROR)
 199                 error = dbus_message_get_error_name(reply);
 200         else
 201                 error = NULL;
 202
 203         if (dbus_message_iter_init(reply, &iter) == FALSE)
 204                 goto done;
 205
 206         if (data->function != NULL)
 207                 data->function(error, &iter, data->user_data);
 208
 209 done:
 210         dbus_message_unref(reply);
 211 }
 212
 213 int supplicant_dbus_property_set(const char *path, const char *interface,
 214                                 const char *key, const char *signature,
 215                                 supplicant_dbus_setup_function setup,
 216                                 supplicant_dbus_result_function function,
 217                                                         void *user_data)
 218 {
 219         struct property_set_data *data;
 220         DBusMessage *message;
 221         DBusMessageIter iter, value;
 222         DBusPendingCall *call;
 223
 224         if (path == NULL || interface == NULL)
 225                 return -EINVAL;
 226
 227         if (key == NULL || signature == NULL || setup == NULL)
 228                 return -EINVAL;
 229
 230         data = dbus_malloc0(sizeof(*data));
 231         if (data == NULL)
 232                 return -ENOMEM;
 233
 234         message = dbus_message_new_method_call(SUPPLICANT_SERVICE, path,
 235                                         DBUS_INTERFACE_PROPERTIES, "Set");
 236         if (message == NULL) {
 237                 dbus_free(data);
 238                 return -ENOMEM;
 239         }
 240
 241         dbus_message_set_auto_start(message, FALSE);
 242
 243         dbus_message_iter_init_append(message, &iter);
 244         dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &interface);
 245         dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &key);
 246
 247         dbus_message_iter_open_container(&iter, DBUS_TYPE_VARIANT,
 248                                                         signature, &value);
 249         setup(&value, user_data);
 250         dbus_message_iter_close_container(&iter, &value);
 251
 252         if (dbus_connection_send_with_reply(connection, message,
 253                                                 &call, TIMEOUT) == FALSE) {
 254                 dbus_message_unref(message);
 255                 dbus_free(data);
 256                 return -EIO;
 257         }
 258
 259         if (call == NULL) {
 260                 dbus_message_unref(message);
 261                 dbus_free(data);
 262                 return -EIO;
 263         }
 264
 265         data->function = function;
 266         data->user_data = user_data;
 267
 268         dbus_pending_call_set_notify(call, property_set_reply,
 269                                                         data, dbus_free);
 270
 271         dbus_message_unref(message);
 272
 273         return 0;
 274 }