usb_moded-dbus.c 33.8 KB
Newer Older
1
/**
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
 * @file        usb_moded-dbus.c
 *
 * Copyright (C) 2010 Nokia Corporation. All rights reserved.
 * Copyright (C) 2012-2018 Jolla. All rights reserved.
 *
 * @author: Philippe De Swert <philippe.de-swert@nokia.com>
 * @author: Philippe De Swert <phdeswer@lumi.maa>
 * @author: Philippe De Swert <philippedeswert@gmail.com>
 * @author: Philippe De Swert <philippe.deswert@jollamobile.com>
 * @author: Vesa Halttunen <vesa.halttunen@jollamobile.com>
 * @author: Slava Monich <slava.monich@jolla.com>
 * @author: Martin Jones <martin.jones@jollamobile.com>
 * @author: Simo Piiroinen <simo.piiroinen@jollamobile.com>
 * @author: Andrew den Exter <andrew.den.exter@jolla.com>
 * @author: Andrew den Exter <andrew.den.exter@jollamobile.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the Lesser GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program 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
 * General Public License for more details.
 *
 * You should have received a copy of the Lesser GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 */
32 33

#include "usb_moded-dbus-private.h"
34

35
#include "usb_moded-config-private.h"
36
#include "usb_moded-control.h"
37 38 39 40 41 42 43 44
#include "usb_moded-log.h"
#include "usb_moded-modes.h"
#include "usb_moded-network.h"

#include <stdlib.h>
#include <string.h>

#include <dbus/dbus-glib-lowlevel.h>
45

46 47 48 49
/* ========================================================================= *
 * Constants
 * ========================================================================= */

50 51 52 53
#define INIT_DONE_INTERFACE "com.nokia.startup.signal"
#define INIT_DONE_SIGNAL    "init_done"
#define INIT_DONE_MATCH     "type='signal',interface='"INIT_DONE_INTERFACE"',member='"INIT_DONE_SIGNAL"'"

54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
/* ========================================================================= *
 * Prototypes
 * ========================================================================= */

/* -- umdbus -- */

static void               umdbus_send_config_signal           (const char *section, const char *key, const char *value);
static DBusHandlerResult  umdbus_msg_handler                  (DBusConnection *const connection, DBusMessage *const msg, gpointer const user_data);
DBusConnection           *umdbus_get_connection               (void);
gboolean                  umdbus_init_connection              (void);
gboolean                  umdbus_init_service                 (void);
static void               umdbus_cleanup_service              (void);
void                      umdbus_cleanup                      (void);
static int                umdbus_send_signal_ex               (const char *signal_type, const char *content);
int                       umdbus_send_state_signal            (const char *state_ind);
int                       umdbus_send_error_signal            (const char *error);
int                       umdbus_send_supported_modes_signal  (const char *supported_modes);
int                       umdbus_send_available_modes_signal  (const char *available_modes);
int                       umdbus_send_hidden_modes_signal     (const char *hidden_modes);
int                       umdbus_send_whitelisted_modes_signal(const char *whitelist);
static void               umdbus_get_name_owner_cb            (DBusPendingCall *pc, void *aptr);
gboolean                  umdbus_get_name_owner_async         (const char *name, usb_moded_get_name_owner_fn cb, DBusPendingCall **ppc);

/* ========================================================================= *
 * Data
 * ========================================================================= */

81 82
static DBusConnection *umdbus_connection = NULL;
static gboolean        umdbus_service_name_acquired   = FALSE;
83

84
/** Introspect xml format string for parents of USB_MODE_OBJECT */
85
static const char umdbus_introspect_template[] =
86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102
"<!DOCTYPE node PUBLIC \"-//freedesktop//DTD D-BUS Object Introspection 1.0//EN\" \"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd\">\n"
"<node name=\"%s\">\n"
"  <interface name=\"org.freedesktop.DBus.Introspectable\">\n"
"    <method name=\"Introspect\">\n"
"      <arg direction=\"out\" name=\"data\" type=\"s\"/>\n"
"    </method>\n"
"  </interface>\n"
"  <interface name=\"org.freedesktop.DBus.Peer\">\n"
"    <method name=\"Ping\"/>\n"
"    <method name=\"GetMachineId\">\n"
"      <arg direction=\"out\" name=\"machine_uuid\" type=\"s\" />\n"
"    </method>\n"
"  </interface>\n"
"  <node name=\"%s\"/>\n"
"</node>\n";

/** Introspect xml data for object path USB_MODE_OBJECT */
103
static const char umdbus_introspect_usbmoded[] =
104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146
"<!DOCTYPE node PUBLIC \"-//freedesktop//DTD D-BUS Object Introspection 1.0//EN\" "
"\"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd\">\n"
"<node name=\"" USB_MODE_OBJECT "\">\n"
"  <interface name=\"org.freedesktop.DBus.Introspectable\">\n"
"    <method name=\"Introspect\">\n"
"      <arg name=\"xml\" type=\"s\" direction=\"out\"/>\n"
"    </method>\n"
"  </interface>\n"
"  <interface name=\"org.freedesktop.DBus.Peer\">\n"
"    <method name=\"Ping\"/>\n"
"    <method name=\"GetMachineId\">\n"
"      <arg direction=\"out\" name=\"machine_uuid\" type=\"s\" />\n"
"    </method>\n"
"  </interface>\n"
"  <interface name=\"" USB_MODE_INTERFACE "\">\n"
"    <method name=\"" USB_MODE_STATE_REQUEST "\">\n"
"      <arg name=\"mode\" type=\"s\" direction=\"out\"/>\n"
"    </method>\n"
"    <method name=\"" USB_MODE_STATE_SET "\">\n"
"      <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"
"      <arg name=\"mode\" type=\"s\" direction=\"out\"/>\n"
"    </method>\n"
"    <method name=\"" USB_MODE_CONFIG_SET "\">\n"
"      <arg name=\"config\" type=\"s\" direction=\"in\"/>\n"
"      <arg name=\"config\" type=\"s\" direction=\"out\"/>\n"
"    </method>\n"
"    <method name=\"" USB_MODE_NETWORK_SET "\">\n"
"      <arg name=\"key\" type=\"s\" direction=\"in\"/>\n"
"      <arg name=\"value\" type=\"s\" direction=\"in\"/>\n"
"      <arg name=\"key\" type=\"s\" direction=\"out\"/>\n"
"      <arg name=\"value\" type=\"s\" direction=\"out\"/>\n"
"    </method>\n"
"    <method name=\"" USB_MODE_NETWORK_GET "\">\n"
"      <arg name=\"key\" type=\"s\" direction=\"in\"/>\n"
"      <arg name=\"key\" type=\"s\" direction=\"out\"/>\n"
"      <arg name=\"value\" type=\"s\" direction=\"out\"/>\n"
"    </method>\n"
"    <method name=\"" USB_MODE_CONFIG_GET "\">\n"
"      <arg name=\"mode\" type=\"s\" direction=\"out\"/>\n"
"    </method>\n"
"    <method name=\"" USB_MODE_LIST "\">\n"
"      <arg name=\"modes\" type=\"s\" direction=\"out\"/>\n"
"    </method>\n"
147 148 149 150 151
"    <method name=\"" USB_MODE_AVAILABLE_MODES_GET "\">\n"
"      <arg name=\"modes\" type=\"s\" direction=\"out\"/>\n"
"    </method>\n"
"    <method name=\"" USB_MODE_WHITELISTED_MODES_GET "\">\n"
"      <arg name=\"modes\" type=\"s\" direction=\"out\"/>\n"
152
"    </method>\n"
153 154 155 156 157 158 159
"    <method name=\"" USB_MODE_WHITELISTED_MODES_SET "\">"
"      <arg name=\"modes\" type=\"s\" direction=\"in\"/>"
"    </method>"
"    <method name=\"" USB_MODE_WHITELISTED_SET "\">"
"      <arg name=\"mode\" type=\"s\" direction=\"in\"/>"
"      <arg name=\"whitelisted\" type=\"b\" direction=\"in\"/>"
"     </method>"
160 161 162 163 164 165 166 167 168 169
"    <method name=\"" USB_MODE_RESCUE_OFF "\"/>\n"
"    <signal name=\"" USB_MODE_SIGNAL_NAME "\">\n"
"      <arg name=\"mode\" type=\"s\"/>\n"
"    </signal>\n"
"    <signal name=\"" USB_MODE_ERROR_SIGNAL_NAME "\">\n"
"      <arg name=\"error\" type=\"s\"/>\n"
"    </signal>\n"
"    <signal name=\"" USB_MODE_SUPPORTED_MODES_SIGNAL_NAME "\">\n"
"      <arg name=\"modes\" type=\"s\"/>\n"
"    </signal>\n"
170 171 172 173 174 175
"    <signal name=\"" USB_MODE_AVAILABLE_MODES_SIGNAL_NAME "\">\n"
"      <arg name=\"modes\" type=\"s\">\n"
"    </signal>\n"
"    <signal name=\"" USB_MODE_WHITELISTED_MODES_SIGNAL_NAME "\">\n"
"      <arg name=\"modes\" type=\"s\">\n"
"    </signal>\n"
176 177 178 179 180 181 182 183
"    <signal name=\"" USB_MODE_CONFIG_SIGNAL_NAME "\">\n"
"      <arg name=\"section\" type=\"s\"/>\n"
"      <arg name=\"key\" type=\"s\"/>\n"
"      <arg name=\"value\" type=\"s\"/>\n"
"    </signal>\n"
"  </interface>\n"
"</node>\n";

184 185 186 187 188 189 190 191
/* ========================================================================= *
 * Functions
 * ========================================================================= */

/**
 * Issues "sig_usb_config_ind" signal.
*/
static void umdbus_send_config_signal(const char *section, const char *key, const char *value)
192
{
193
    DBusMessage* msg = 0;
194

195 196 197 198 199 200 201
    if( !section || !key || !value )  {
        log_err("config notification with NULL %s",
                !section ? "section" : !key ? "key" : value);
        goto EXIT;
    }

    if( !umdbus_service_name_acquired ) {
202 203
        log_err("config notification without service: [%s] %s=%s",
                section, key, value);
204
        goto EXIT;
205
    }
206 207 208 209 210

    if( !umdbus_connection ) {
        log_err("config notification without connection: [%s] %s=%s",
                section, key, value);
        goto EXIT;
211
    }
212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227

    log_debug("broadcast signal %s(%s, %s, %s)\n", USB_MODE_CONFIG_SIGNAL_NAME, section, key, value);

    msg = dbus_message_new_signal(USB_MODE_OBJECT, USB_MODE_INTERFACE, USB_MODE_CONFIG_SIGNAL_NAME);
    if( !msg )
        goto EXIT;

    dbus_message_append_args(msg, DBUS_TYPE_STRING, &section,
                             DBUS_TYPE_STRING, &key,
                             DBUS_TYPE_STRING, &value,
                             DBUS_TYPE_INVALID);
    dbus_connection_send(umdbus_connection, msg, NULL);

EXIT:
    if( msg )
        dbus_message_unref(msg);
228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254
}

static DBusHandlerResult umdbus_msg_handler(DBusConnection *const connection, DBusMessage *const msg, gpointer const user_data)
{
    DBusHandlerResult   status    = DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
    DBusMessage        *reply     = 0;
    const char         *interface = dbus_message_get_interface(msg);
    const char         *member    = dbus_message_get_member(msg);
    const char         *object    = dbus_message_get_path(msg);
    int                 type      = dbus_message_get_type(msg);

    (void)user_data;

    if(!interface || !member || !object) goto EXIT;

    log_debug("DBUS %s %s.%s from %s",
              dbus_message_type_to_string(type),
              interface, member,
              dbus_message_get_sender(msg) ?: "N/A");

    if( type == DBUS_MESSAGE_TYPE_SIGNAL )
    {
        if( !strcmp(interface, INIT_DONE_INTERFACE) && !strcmp(member, INIT_DONE_SIGNAL) ) {
            /* Update the cached state value */
            usbmoded_set_init_done(true);

            /* Auto-disable rescue mode when bootup is finished */
255 256
            if( usbmoded_get_rescue_mode() ) {
                usbmoded_set_rescue_mode(false);
257 258 259 260 261 262 263 264 265 266 267 268
                log_debug("init done reached - rescue mode disabled");
            }
        }
        goto EXIT;
    }

    if( type == DBUS_MESSAGE_TYPE_METHOD_CALL && !strcmp(interface, USB_MODE_INTERFACE) && !strcmp(object, USB_MODE_OBJECT))
    {
        status = DBUS_HANDLER_RESULT_HANDLED;

        if(!strcmp(member, USB_MODE_STATE_REQUEST))
        {
269
            const char *mode = control_get_external_mode();
270 271 272 273 274 275 276 277

            /* To the outside we want to keep CHARGING and CHARGING_FALLBACK the same */
            if(!strcmp(MODE_CHARGING_FALLBACK, mode))
                mode = MODE_CHARGING;
            if((reply = dbus_message_new_method_return(msg)))
                dbus_message_append_args (reply, DBUS_TYPE_STRING, &mode, DBUS_TYPE_INVALID);
        }
        else if(!strcmp(member, USB_MODE_STATE_SET))
278
        {
279 280 281 282 283 284 285 286
            char *use = 0;
            DBusError   err = DBUS_ERROR_INIT;

            if(!dbus_message_get_args(msg, &err, DBUS_TYPE_STRING, &use, DBUS_TYPE_INVALID))
                reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, member);
            else
            {
                /* check if usb is connected, since it makes no sense to change mode if it isn't */
287
                if( control_get_cable_state() != CABLE_STATE_PC_CONNECTED ) {
288 289 290 291
                    log_warning("USB not connected, not changing mode!\n");
                    goto error_reply;
                }
                /* check if the mode exists */
292
                if(common_valid_mode(use))
293 294
                    goto error_reply;
                /* do not change mode if the mode requested is the one already set */
295
                if(strcmp(use, control_get_usb_mode()) != 0)
296
                {
297
                    control_set_usb_mode(use);
298
                }
299
                if((reply = dbus_message_new_method_return(msg)))
300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368
                    dbus_message_append_args (reply, DBUS_TYPE_STRING, &use, DBUS_TYPE_INVALID);
                else
                    error_reply:
                    reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, member);
            }
            dbus_error_free(&err);
        }
        else if(!strcmp(member, USB_MODE_CONFIG_SET))
        {
            char *config = 0;
            DBusError   err = DBUS_ERROR_INIT;

            if(!dbus_message_get_args(msg, &err, DBUS_TYPE_STRING, &config, DBUS_TYPE_INVALID))
                reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, member);
            else
            {
                /* error checking is done when setting configuration */
                int ret = config_set_mode_setting(config);
                if (ret == SET_CONFIG_UPDATED)
                    umdbus_send_config_signal(MODE_SETTING_ENTRY, MODE_SETTING_KEY, config);
                if (SET_CONFIG_OK(ret))
                {
                    if((reply = dbus_message_new_method_return(msg)))
                        dbus_message_append_args (reply, DBUS_TYPE_STRING, &config, DBUS_TYPE_INVALID);
                }
                else
                    reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, config);
            }
            dbus_error_free(&err);
        }
        else if(!strcmp(member, USB_MODE_HIDE))
        {
            char *config = 0;
            DBusError   err = DBUS_ERROR_INIT;

            if(!dbus_message_get_args(msg, &err, DBUS_TYPE_STRING, &config, DBUS_TYPE_INVALID))
                reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, member);
            else
            {
                /* error checking is done when setting configuration */
                int ret = config_set_hide_mode_setting(config);
                if (ret == SET_CONFIG_UPDATED)
                    umdbus_send_config_signal(MODE_SETTING_ENTRY, MODE_HIDE_KEY, config);
                if (SET_CONFIG_OK(ret))
                {
                    if((reply = dbus_message_new_method_return(msg)))
                        dbus_message_append_args (reply, DBUS_TYPE_STRING, &config, DBUS_TYPE_INVALID);
                }
                else
                    reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, config);
            }
            dbus_error_free(&err);
        }
        else if(!strcmp(member, USB_MODE_UNHIDE))
        {
            char *config = 0;
            DBusError   err = DBUS_ERROR_INIT;

            if(!dbus_message_get_args(msg, &err, DBUS_TYPE_STRING, &config, DBUS_TYPE_INVALID))
                reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, member);
            else
            {
                /* error checking is done when setting configuration */
                int ret = config_set_unhide_mode_setting(config);
                if (ret == SET_CONFIG_UPDATED)
                    umdbus_send_config_signal(MODE_SETTING_ENTRY, MODE_HIDE_KEY, config);
                if (SET_CONFIG_OK(ret))
                {
                    if((reply = dbus_message_new_method_return(msg)))
369
                        dbus_message_append_args (reply, DBUS_TYPE_STRING, &config, DBUS_TYPE_INVALID);
370 371 372 373 374
                }
                else
                    reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, config);
            }
            dbus_error_free(&err);
375
        }
376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441
        else if(!strcmp(member, USB_MODE_HIDDEN_GET))
        {
            char *config = config_get_hidden_modes();
            if(!config)
                config = g_strdup("");
            if((reply = dbus_message_new_method_return(msg)))
                dbus_message_append_args (reply, DBUS_TYPE_STRING, &config, DBUS_TYPE_INVALID);
            g_free(config);
        }
        else if(!strcmp(member, USB_MODE_NETWORK_SET))
        {
            char *config = 0, *setting = 0;
            DBusError   err = DBUS_ERROR_INIT;

            if(!dbus_message_get_args(msg, &err, DBUS_TYPE_STRING, &config, DBUS_TYPE_STRING, &setting, DBUS_TYPE_INVALID))
                reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, member);
            else
            {
                /* error checking is done when setting configuration */
                int ret = config_set_network_setting(config, setting);
                if (ret == SET_CONFIG_UPDATED)
                    umdbus_send_config_signal(NETWORK_ENTRY, config, setting);
                if (SET_CONFIG_OK(ret))
                {
                    if((reply = dbus_message_new_method_return(msg)))
                        dbus_message_append_args (reply, DBUS_TYPE_STRING, &config, DBUS_TYPE_STRING, &setting, DBUS_TYPE_INVALID);
                    network_update();
                }
                else
                    reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, config);
            }
            dbus_error_free(&err);
        }
        else if(!strcmp(member, USB_MODE_NETWORK_GET))
        {
            char *config = 0;
            char *setting = 0;
            DBusError   err = DBUS_ERROR_INIT;

            if(!dbus_message_get_args(msg, &err, DBUS_TYPE_STRING, &config, DBUS_TYPE_INVALID))
            {
                reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, member);
            }
            else
            {
                setting = config_get_network_setting(config);
                if(setting)
                {
                    if((reply = dbus_message_new_method_return(msg)))
                        dbus_message_append_args (reply, DBUS_TYPE_STRING, &config, DBUS_TYPE_STRING, &setting, DBUS_TYPE_INVALID);
                    free(setting);
                }
                else
                    reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, config);
            }
        }
        else if(!strcmp(member, USB_MODE_CONFIG_GET))
        {
            char *config = config_get_mode_setting();

            if((reply = dbus_message_new_method_return(msg)))
                dbus_message_append_args (reply, DBUS_TYPE_STRING, &config, DBUS_TYPE_INVALID);
            g_free(config);
        }
        else if(!strcmp(member, USB_MODE_LIST))
        {
442
            gchar *mode_list = common_get_mode_list(SUPPORTED_MODES_LIST);
443

444 445 446 447 448 449
            if((reply = dbus_message_new_method_return(msg)))
                dbus_message_append_args (reply, DBUS_TYPE_STRING, (const char *) &mode_list, DBUS_TYPE_INVALID);
            g_free(mode_list);
        }
        else if(!strcmp(member, USB_MODE_AVAILABLE_MODES_GET))
        {
450
            gchar *mode_list = common_get_mode_list(AVAILABLE_MODES_LIST);
451 452 453 454 455 456 457

            if((reply = dbus_message_new_method_return(msg)))
                dbus_message_append_args (reply, DBUS_TYPE_STRING, (const char *) &mode_list, DBUS_TYPE_INVALID);
            g_free(mode_list);
        }
        else if(!strcmp(member, USB_MODE_RESCUE_OFF))
        {
458
            usbmoded_set_rescue_mode(false);
459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546
            log_debug("Rescue mode off\n ");
            reply = dbus_message_new_method_return(msg);
        }
        else if(!strcmp(member, USB_MODE_WHITELISTED_MODES_GET))
        {
            gchar *mode_list = config_get_mode_whitelist();

            if(!mode_list)
                mode_list = g_strdup("");

            if((reply = dbus_message_new_method_return(msg)))
                dbus_message_append_args(reply, DBUS_TYPE_STRING, &mode_list, DBUS_TYPE_INVALID);
            g_free(mode_list);
        }
        else if(!strcmp(member, USB_MODE_WHITELISTED_MODES_SET))
        {
            const char *whitelist = 0;
            DBusError err = DBUS_ERROR_INIT;

            if (!dbus_message_get_args(msg, &err, DBUS_TYPE_STRING, &whitelist, DBUS_TYPE_INVALID))
                reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, member);
            else
            {
                int ret = config_set_mode_whitelist(whitelist);
                if (ret == SET_CONFIG_UPDATED)
                    umdbus_send_config_signal(MODE_SETTING_ENTRY, MODE_WHITELIST_KEY, whitelist);
                if (SET_CONFIG_OK(ret))
                {
                    if ((reply = dbus_message_new_method_return(msg)))
                        dbus_message_append_args(reply, DBUS_TYPE_STRING, &whitelist, DBUS_TYPE_INVALID);
                }
                else
                    reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, whitelist);
            }
            dbus_error_free(&err);
        }
        else if (!strcmp(member, USB_MODE_WHITELISTED_SET))
        {
            const char *mode = 0;
            dbus_bool_t enabled = FALSE;
            DBusError err = DBUS_ERROR_INIT;

            if (!dbus_message_get_args(msg, &err, DBUS_TYPE_STRING, &mode, DBUS_TYPE_BOOLEAN, &enabled, DBUS_TYPE_INVALID))
                reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, member);
            else
            {
                int ret = config_set_mode_in_whitelist(mode, enabled);
                if (ret == SET_CONFIG_UPDATED)
                {
                    char *whitelist = config_get_mode_whitelist();
                    if (!whitelist)
                        whitelist = g_strdup(MODE_UNDEFINED);
                    umdbus_send_config_signal(MODE_SETTING_ENTRY, MODE_WHITELIST_KEY, whitelist);
                    g_free(whitelist);
                }
                if (SET_CONFIG_OK(ret))
                    reply = dbus_message_new_method_return(msg);
                else
                    reply = dbus_message_new_error(msg, DBUS_ERROR_INVALID_ARGS, mode);
            }
            dbus_error_free(&err);
        }
        else
        {
            /*unknown methods are handled here */
            reply = dbus_message_new_error(msg, DBUS_ERROR_UNKNOWN_METHOD, member);
        }

        if( !reply )
        {
            reply = dbus_message_new_error(msg, DBUS_ERROR_FAILED, member);
        }
    }
    else if( type == DBUS_MESSAGE_TYPE_METHOD_CALL &&
             !strcmp(interface, "org.freedesktop.DBus.Introspectable") &&
             !strcmp(member, "Introspect"))
    {
        const gchar *xml = 0;
        gchar       *tmp = 0;
        gchar       *err = 0;
        size_t       len = strlen(object);
        const char  *pos = USB_MODE_OBJECT;

        if( !strncmp(object, pos, len) )
        {
            if( pos[len] == 0 )
            {
                /* Full length USB_MODE_OBJECT requested */
547
                xml = umdbus_introspect_usbmoded;
548 549 550 551 552 553 554 555 556 557
            }
            else if( pos[len] == '/' )
            {
                /* Leading part of USB_MODE_OBJECT requested */
                gchar *parent = 0;
                gchar *child = 0;
                parent = g_strndup(pos, len);
                pos += len + 1;
                len = strcspn(pos, "/");
                child = g_strndup(pos, len);
558
                xml = tmp = g_strdup_printf(umdbus_introspect_template,
559 560 561 562 563 564 565 566 567 568 569 570
                                            parent, child);
                g_free(child);
                g_free(parent);
            }
            else if( !strcmp(object, "/") )
            {
                /* Root object needs to be handled separately */
                const char *parent = "/";
                gchar *child = 0;
                pos += 1;
                len = strcspn(pos, "/");
                child = g_strndup(pos, len);
571
                xml = tmp = g_strdup_printf(umdbus_introspect_template,
572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598
                                            parent, child);
                g_free(child);
            }
        }

        if( xml )
        {
            if((reply = dbus_message_new_method_return(msg)))
                dbus_message_append_args (reply,
                                          DBUS_TYPE_STRING, &xml,
                                          DBUS_TYPE_INVALID);
        }
        else
        {
            err = g_strdup_printf("Object '%s' does not exist", object);
            reply = dbus_message_new_error(msg, DBUS_ERROR_UNKNOWN_OBJECT,
                                           err);
        }

        g_free(err);
        g_free(tmp);

        if( reply )
        {
            status = DBUS_HANDLER_RESULT_HANDLED;
        }
    }
599 600 601

EXIT:

602 603 604 605 606 607 608 609 610 611 612
    if(reply)
    {
        if( !dbus_message_get_no_reply(msg) )
        {
            if( !dbus_connection_send(connection, reply, 0) )
                log_debug("Failed sending reply. Out Of Memory!\n");
        }
        dbus_message_unref(reply);
    }

    return status;
613 614
}

615
DBusConnection *umdbus_get_connection(void)
616 617
{
    DBusConnection *connection = 0;
618 619
    if( umdbus_connection )
        connection = dbus_connection_ref(umdbus_connection);
620
    else
621
        log_err("something asked for connection ref while unconnected");
622 623 624
    return connection;
}

625
/**
626
 * Establish D-Bus SystemBus connection
627 628 629
 *
 * @return TRUE when everything went ok
 */
630
gboolean umdbus_init_connection(void)
631
{
632 633
    gboolean status = FALSE;
    DBusError error = DBUS_ERROR_INIT;
634

635
    /* connect to system bus */
636
    if ((umdbus_connection = dbus_bus_get(DBUS_BUS_SYSTEM, &error)) == NULL)
637 638
    {
        log_debug("Failed to open connection to system message bus; %s\n",  error.message);
639
        goto EXIT;
640
    }
641

642
    /* Initialise message handlers */
643
    if (!dbus_connection_add_filter(umdbus_connection, umdbus_msg_handler, NULL, NULL))
644
        goto EXIT;
645

646
    /* Listen to init-done signals */
647
    dbus_bus_add_match(umdbus_connection, INIT_DONE_MATCH, 0);
648

649 650
    /* Re-check flag file after adding signal listener */
    usbmoded_probe_init_done();
651

652
    /* Connect D-Bus to the mainloop */
653
    dbus_connection_setup_with_g_main(umdbus_connection, NULL);
654

655 656
    /* everything went fine */
    status = TRUE;
657 658

EXIT:
659 660
    dbus_error_free(&error);
    return status;
661 662 663 664 665 666 667
}

/**
 * Reserve "com.meego.usb_moded" D-Bus Service Name
 *
 * @return TRUE when everything went ok
 */
668
gboolean umdbus_init_service(void)
669
{
670 671 672 673
    gboolean status = FALSE;
    DBusError error = DBUS_ERROR_INIT;
    int ret;

674
    if( !umdbus_connection ) {
675
        goto EXIT;
676 677 678
    }

    /* Acquire D-Bus service */
679
    ret = dbus_bus_request_name(umdbus_connection, USB_MODE_SERVICE, DBUS_NAME_FLAG_DO_NOT_QUEUE, &error);
680 681 682 683 684 685 686 687
    if (ret != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER)
    {
        log_debug("failed claiming dbus name\n");
        if( dbus_error_is_set(&error) )
            log_debug("DBUS ERROR: %s, %s \n", error.name, error.message);
        goto EXIT;
    }
    log_debug("claimed name %s", USB_MODE_SERVICE);
688
    umdbus_service_name_acquired = TRUE;
689 690
    /* everything went fine */
    status = TRUE;
691

692
EXIT:
693 694
    dbus_error_free(&error);
    return status;
695 696
}

697 698
/** Release "com.meego.usb_moded" D-Bus Service Name
 */
699
static void umdbus_cleanup_service(void)
700
{
701
    if( !umdbus_service_name_acquired )
702 703
        goto EXIT;

704
    umdbus_service_name_acquired = FALSE;
705 706
    log_debug("release name %s", USB_MODE_SERVICE);

707 708
    if( umdbus_connection &&
        dbus_connection_get_is_connected(umdbus_connection) )
709
    {
710
        dbus_bus_release_name(umdbus_connection, USB_MODE_SERVICE, NULL);
711 712 713 714 715 716
    }

EXIT:
    return;
}

717 718 719 720
/**
 * Clean up the dbus connections on exit
 *
 */
721
void umdbus_cleanup(void)
722
{
723
    /* clean up system bus connection */
724
    if (umdbus_connection != NULL)
725
    {
726
        umdbus_cleanup_service();
727

728
        dbus_connection_remove_filter(umdbus_connection, umdbus_msg_handler, NULL);
729

730 731
        dbus_connection_unref(umdbus_connection),
            umdbus_connection = NULL;
732
    }
733 734 735
}

/**
736
 * Helper function for sending the different signals
737
 *
738
 * @return 0 on success, 1 on failure
739 740
 * @param signal_type the type of signal (normal, error, ...)
 * @@param content string which can be mode name, error, list of modes, ...
741
*/
742
static int umdbus_send_signal_ex(const char *signal_type, const char *content)
743
{
744 745 746
    int result = 1;
    DBusMessage* msg = 0;

747 748 749 750 751
    /* Assume NULL content equals no value / empty list, and that skipping
     * signal broadcast is never preferable over sending empty string. */
    if( !content )
        content = "";

752 753
    log_debug("broadcast signal %s(%s)\n", signal_type, content);

754
    if( !umdbus_service_name_acquired )
755 756 757 758 759
    {
        log_err("sending signal without service: %s(%s)",
                signal_type, content);
        goto EXIT;
    }
760
    if(!umdbus_connection)
761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780
    {
        log_err("Dbus system connection broken!\n");
        goto EXIT;
    }
    // create a signal and check for errors
    msg = dbus_message_new_signal(USB_MODE_OBJECT, USB_MODE_INTERFACE, signal_type );
    if (NULL == msg)
    {
        log_debug("Message Null\n");
        goto EXIT;
    }

    // append arguments onto signal
    if (!dbus_message_append_args(msg, DBUS_TYPE_STRING, &content, DBUS_TYPE_INVALID))
    {
        log_debug("Appending arguments failed. Out Of Memory!\n");
        goto EXIT;
    }

    // send the message on the correct bus  and flush the connection
781
    if (!dbus_connection_send(umdbus_connection, msg, 0))
782 783 784 785 786
    {
        log_debug("Failed sending message. Out Of Memory!\n");
        goto EXIT;
    }
    result = 0;
787

788
EXIT:
789 790 791
    // free the message
    if(msg != 0)
        dbus_message_unref(msg);
792

793
    return result;
794 795
}

796 797 798
/**
 * Send regular usb_moded state signal
 *
799
 * @return 0 on success, 1 on failure
800 801 802
 * @param state_ind the signal name
 *
*/
803
int umdbus_send_state_signal(const char *state_ind)
804
{
805
    return(umdbus_send_signal_ex(USB_MODE_SIGNAL_NAME, state_ind));
806
}
807

808 809 810
/**
 * Send regular usb_moded error signal
 *
811
 * @return 0 on success, 1 on failure
812
 * @param error the error to be signalled
813 814
 *
*/
815
int umdbus_send_error_signal(const char *error)
816
{
817
    return(umdbus_send_signal_ex(USB_MODE_ERROR_SIGNAL_NAME, error));
818
}
819

820 821 822
/**
 * Send regular usb_moded mode list signal
 *
823
 * @return 0 on success, 1 on failure
824
 * @param supported_modes list of supported modes
825 826
 *
*/
827
int umdbus_send_supported_modes_signal(const char *supported_modes)
828
{
829
    return(umdbus_send_signal_ex(USB_MODE_SUPPORTED_MODES_SIGNAL_NAME, supported_modes));
830
}
831

832 833 834 835 836 837 838
/**
 * Send regular usb_moded mode list signal
 *
 * @return 0 on success, 1 on failure
 * @param available_modes list of available modes
 *
*/
839
int umdbus_send_available_modes_signal(const char *available_modes)
840
{
841
    return(umdbus_send_signal_ex(USB_MODE_AVAILABLE_MODES_SIGNAL_NAME, available_modes));
842 843
}

844 845 846 847 848 849 850
/**
 * Send regular usb_moded hidden mode list signal
 *
 * @return 0 on success, 1 on failure
 * @param hidden_modes list of supported modes
 *
*/
851
int umdbus_send_hidden_modes_signal(const char *hidden_modes)
852
{
853
    return(umdbus_send_signal_ex(USB_MODE_HIDDEN_MODES_SIGNAL_NAME, hidden_modes));
854
}
855

856 857 858 859 860 861
/**
 * Send regular usb_moded whitelisted mode list signal
 *
 * @return 0 on success, 1 on failure
 * @param whitelist list of allowed modes
 */
862
int umdbus_send_whitelisted_modes_signal(const char *whitelist)
863
{
864
    return(umdbus_send_signal_ex(USB_MODE_WHITELISTED_MODES_SIGNAL_NAME, whitelist));
865 866
}

867
/** Async reply handler for umdbus_get_name_owner_async()
868 869 870 871
 *
 * @param pc    Pending call object pointer
 * @param aptr  Notify function to call (as a void pointer)
 */
872
static void umdbus_get_name_owner_cb(DBusPendingCall *pc, void *aptr)
873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896
{
    usb_moded_get_name_owner_fn cb = aptr;

    DBusMessage *rsp = 0;
    const char  *dta = 0;
    DBusError    err = DBUS_ERROR_INIT;

    if( !(rsp = dbus_pending_call_steal_reply(pc)) ) {
        log_err("did not get reply");
        goto EXIT;
    }

    if( dbus_set_error_from_message(&err, rsp) )
    {
        if( strcmp(err.name, DBUS_ERROR_NAME_HAS_NO_OWNER) )
            log_err("error reply: %s: %s", err.name, err.message);
        goto EXIT;
    }

    if( !dbus_message_get_args(rsp, &err,
                               DBUS_TYPE_STRING, &dta,
                               DBUS_TYPE_INVALID) )
    {
        if( strcmp(err.name, DBUS_ERROR_NAME_HAS_NO_OWNER) )
897
            log_err("parse error: %s: %s", err.name, err.message);
898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918
        goto EXIT;
    }

EXIT:
    /* Allways call the notification function. Equate any error
     * situations with "service does not have an owner". */
    cb(dta ?: "");

    if( rsp ) dbus_message_unref(rsp);

    dbus_error_free(&err);
}

/** Helper function for making async dbus name owner queries
 *
 * @param name  D-Bus name to query
 * @param cb    Function to call when async reply is received
 * @param ppc   Where to store pending call object, or NULL
 *
 * @return TRUE if method call was sent, FALSE otherwise
 */
919
gboolean umdbus_get_name_owner_async(const char *name,
920 921 922 923 924 925 926
                                        usb_moded_get_name_owner_fn cb,
                                        DBusPendingCall **ppc)
{
    gboolean         ack = FALSE;
    DBusMessage     *req = 0;
    DBusPendingCall *pc  = 0;

927
    if(!umdbus_connection)
928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945
        goto EXIT;

    req = dbus_message_new_method_call(DBUS_INTERFACE_DBUS,
                                       DBUS_PATH_DBUS,
                                       DBUS_INTERFACE_DBUS,
                                       DBUS_GET_NAME_OWNER_REQ);
    if( !req ) {
        log_err("could not create method call message");
        goto EXIT;
    }

    if( !dbus_message_append_args(req,
                                  DBUS_TYPE_STRING, &name,
                                  DBUS_TYPE_INVALID) ) {
        log_err("could not add method call parameters");
        goto EXIT;
    }

946
    if( !dbus_connection_send_with_reply(umdbus_connection, req, &pc, -1) )
947 948 949 950 951
        goto EXIT;

    if( !pc )
        goto EXIT;

952
    if( !dbus_pending_call_set_notify(pc, umdbus_get_name_owner_cb, cb, 0) )
953 954 955 956 957 958 959 960 961 962 963 964 965 966
        goto EXIT;

    ack = TRUE;

    if( ppc )
        *ppc = pc, pc = 0;

EXIT:

    if( pc  ) dbus_pending_call_unref(pc);
    if( req ) dbus_message_unref(req);

    return ack;
}