plugins/dbusoob.c

   1 /*
   2  *
   3  *  BlueZ - Bluetooth protocol stack for Linux
   4  *
   5  *  Copyright (C) 2011  ST-Ericsson SA
   6  *
   7  *  Author: Szymon Janc <szymon.janc@tieto.com> for ST-Ericsson
   8  *
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program 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
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  23  *
  24  */
  25
  26 #ifdef HAVE_CONFIG_H
  27 #include <config.h>
  28 #endif
  29
  30 #include <errno.h>
  31 #include <gdbus.h>
  32
  33 #include <bluetooth/bluetooth.h>
  34 #include <bluetooth/hci.h>
  35 #include <bluetooth/sdp.h>
  36
  37 #include "plugin.h"
  38 #include "log.h"
  39 #include "adapter.h"
  40 #include "device.h"
  41 #include "manager.h"
  42 #include "dbus-common.h"
  43 #include "event.h"
  44 #include "error.h"
  45 #include "oob.h"
  46
  47 #define OOB_INTERFACE   "org.bluez.OutOfBand"
  48
  49 struct oob_request {
  50         struct btd_adapter *adapter;
  51         DBusMessage *msg;
  52 };
  53
  54 static GSList *oob_requests = NULL;
  55 static DBusConnection *connection = NULL;
  56
  57 static gint oob_request_cmp(gconstpointer a, gconstpointer b)
  58 {
  59         const struct oob_request *data = a;
  60         const struct btd_adapter *adapter = b;
  61
  62         return data->adapter != adapter;
  63 }
  64
  65 static struct oob_request *find_oob_request(struct btd_adapter *adapter)
  66 {
  67         GSList *match;
  68
  69         match = g_slist_find_custom(oob_requests, adapter, oob_request_cmp);
  70
  71         if (match)
  72                 return match->data;
  73
  74         return NULL;
  75 }
  76
  77 static void read_local_data_complete(struct btd_adapter *adapter, uint8_t *hash,
  78                                 uint8_t *randomizer)
  79 {
  80         struct DBusMessage *reply;
  81         struct oob_request *oob_request;
  82
  83         oob_request = find_oob_request(adapter);
  84         if (!oob_request)
  85                 return;
  86
  87         if (hash && randomizer)
  88                 reply = g_dbus_create_reply(oob_request->msg,
  89                         DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE, &hash, 16,
  90                         DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE, &randomizer, 16,
  91                         DBUS_TYPE_INVALID);
  92         else
  93                 reply = btd_error_failed(oob_request->msg,
  94                                         "Failed to read local OOB data.");
  95
  96         oob_requests = g_slist_remove(oob_requests, oob_request);
  97         dbus_message_unref(oob_request->msg);
  98         g_free(oob_request);
  99
 100         if (!reply) {
 101                 error("Couldn't allocate D-Bus message");
 102                 return;
 103         }
 104
 105         if (!g_dbus_send_message(connection, reply))
 106                 error("D-Bus send failed");
 107 }
 108
 109 static DBusMessage *read_local_data(DBusConnection *conn, DBusMessage *msg,
 110                                                                 void *data)
 111 {
 112         struct btd_adapter *adapter = data;
 113         struct oob_request *oob_request;
 114
 115         if (find_oob_request(adapter))
 116                 return btd_error_in_progress(msg);
 117
 118         if (btd_adapter_read_local_oob_data(adapter))
 119                 return btd_error_failed(msg, "Request failed.");
 120
 121         oob_request = g_new(struct oob_request, 1);
 122         oob_request->adapter = adapter;
 123         oob_requests = g_slist_append(oob_requests, oob_request);
 124         oob_request->msg = dbus_message_ref(msg);
 125
 126         return NULL;
 127 }
 128
 129 static DBusMessage *add_remote_data(DBusConnection *conn, DBusMessage *msg,
 130                                                                 void *data)
 131 {
 132         struct btd_adapter *adapter = data;
 133         uint8_t *hash, *randomizer;
 134         int32_t hlen, rlen;
 135         const char *addr;
 136         bdaddr_t bdaddr;
 137
 138         if (!dbus_message_get_args(msg, NULL,
 139                         DBUS_TYPE_STRING, &addr,
 140                         DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE, &hash, &hlen,
 141                         DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE, &randomizer, &rlen,
 142                         DBUS_TYPE_INVALID))
 143                 return btd_error_invalid_args(msg);
 144
 145         if (hlen != 16 || rlen != 16 || bachk(addr))
 146                 return btd_error_invalid_args(msg);
 147
 148         str2ba(addr, &bdaddr);
 149
 150         if (btd_adapter_add_remote_oob_data(adapter, &bdaddr, hash, randomizer))
 151                 return btd_error_failed(msg, "Request failed");
 152
 153         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 154 }
 155
 156 static DBusMessage *remove_remote_data(DBusConnection *conn, DBusMessage *msg,
 157                                                                 void *data)
 158 {
 159         struct btd_adapter *adapter = data;
 160         const char *addr;
 161         bdaddr_t bdaddr;
 162
 163         if (!dbus_message_get_args(msg, NULL, DBUS_TYPE_STRING, &addr,
 164                         DBUS_TYPE_INVALID))
 165                 return btd_error_invalid_args(msg);
 166
 167         if (bachk(addr))
 168                 return btd_error_invalid_args(msg);
 169
 170         str2ba(addr, &bdaddr);
 171
 172         if (btd_adapter_remove_remote_oob_data(adapter, &bdaddr))
 173                 return btd_error_failed(msg, "Request failed");
 174
 175         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 176 }
 177
 178 static GDBusMethodTable oob_methods[] = {
 179         {"AddRemoteData",       "sayay",        "",     add_remote_data},
 180         {"RemoveRemoteData",    "s",            "",     remove_remote_data},
 181         {"ReadLocalData",       "",             "ayay", read_local_data,
 182                                                 G_DBUS_METHOD_FLAG_ASYNC},
 183         {}
 184 };
 185
 186 static int oob_probe(struct btd_adapter *adapter)
 187 {
 188         const char *path = adapter_get_path(adapter);
 189
 190         if (!g_dbus_register_interface(connection, path, OOB_INTERFACE,
 191                                 oob_methods, NULL, NULL, adapter, NULL)) {
 192                         error("OOB interface init failed on path %s", path);
 193                         return -EIO;
 194                 }
 195
 196         return 0;
 197 }
 198
 199 static void oob_remove(struct btd_adapter *adapter)
 200 {
 201         read_local_data_complete(adapter, NULL, NULL);
 202
 203         g_dbus_unregister_interface(connection, adapter_get_path(adapter),
 204                                                         OOB_INTERFACE);
 205 }
 206
 207 static struct btd_adapter_driver oob_driver = {
 208         .name   = "oob",
 209         .probe  = oob_probe,
 210         .remove = oob_remove,
 211 };
 212
 213 static int dbusoob_init(void)
 214 {
 215         DBG("Setup dbusoob plugin");
 216
 217         connection = get_dbus_connection();
 218
 219         oob_register_cb(read_local_data_complete);
 220
 221         return btd_register_adapter_driver(&oob_driver);
 222 }
 223
 224 static void dbusoob_exit(void)
 225 {
 226         DBG("Cleanup dbusoob plugin");
 227
 228         manager_foreach_adapter((adapter_cb) oob_remove, NULL);
 229
 230         btd_unregister_adapter_driver(&oob_driver);
 231 }
 232
 233 BLUETOOTH_PLUGIN_DEFINE(dbusoob, VERSION, BLUETOOTH_PLUGIN_PRIORITY_DEFAULT,
 234                                                 dbusoob_init, dbusoob_exit)