main.c

   1 #include <Ecore.h>
   2 #include <E_DBus.h>
   3 #include <Efreet.h>
   4 #include <Eina.h>
   5 #include <getopt.h>
   6 #include <jansson.h>
   7 #include <libwebsockets.h>
   8 #include <string.h>
   9 #include <unistd.h>
  10 #include <sys/inotify.h>
  11 #include <sys/types.h>
  12 #include <sys/stat.h>
  13
  14 enum sockdrawer_protocols {
  15     PROTOCOL_HTTP = 0,
  16     PROTOCOL_APP_LIST,
  17     PROTOCOL_DIALER,
  18     SOCKDRAWER_PROTOCOL_COUNT
  19 };
  20
  21 #ifdef INSTALL_DATADIR
  22 #define LOCAL_RESOURCE_PATH INSTALL_DATADIR"/sockdrawer"
  23 #else
  24 #define LOCAL_RESOURCE_PATH "."
  25 #endif
  26
  27 #define DEFAULTCONTENT LOCAL_RESOURCE_PATH"/index.html"
  28 #define DEFAULTICON LOCAL_RESOURCE_PATH"/default.png"
  29
  30 #define APPDIR "/usr/share/applications"
  31
  32 struct libwebsocket_context *context;
  33
  34 E_DBus_Connection *bus;
  35
  36 json_t *app_list = NULL;
  37 char *apps_directory = NULL;
  38
  39 json_t *event_queue = NULL;
  40
  41 #define MAX_POLL_ELEMENTS 100
  42 struct pollfd pollfds[100];
  43 int count_pollfds = 0;
  44
  45 void handle_command(json_t *o);
  46 static int callback_http(struct libwebsocket_context *context,
  47                          struct libwebsocket *wsi,
  48                          enum libwebsocket_callback_reasons reason, void *user,
  49                          void *in, size_t len);
  50 void send_app_list(struct libwebsocket *socket);
  51 static int callback_app_list(struct libwebsocket_context *context,
  52                              struct libwebsocket *wsi,
  53                              enum libwebsocket_callback_reasons reason,
  54                              void *user, void *in, size_t len);
  55 static Eina_Bool get_websocket_event(void *data);
  56 static int callback_dialer(struct libwebsocket_context *context,
  57                            struct libwebsocket *wsi,
  58                            enum libwebsocket_callback_reasons reason,
  59                            void *user, void *in, size_t len);
  60
  61 /*
  62  * Per instance data
  63  */
  64 struct per_session_data__app_list {
  65     int placeholder;
  66 };
  67 struct per_session_data__dialer {
  68     int placeholder;
  69 };
  70
  71 static struct libwebsocket_protocols protocols[] = {
  72     {
  73         "http-only",
  74         callback_http,
  75         0
  76     },
  77    {
  78         "app-list-protocol",
  79         callback_app_list,
  80         sizeof(struct per_session_data__app_list),
  81     },
  82    {
  83         "dialer-protocol",
  84         callback_dialer,
  85         sizeof(struct per_session_data__dialer),
  86     },
  87     {
  88         NULL, NULL, 0
  89     }
  90 };
  91
  92 /* libwebsocket callback for handling normal http request. We use this */
  93 /* to implementa a rudamentary webserver. */
  94 static int
  95 callback_http(struct libwebsocket_context *context,
  96               struct libwebsocket *wsi,
  97               enum libwebsocket_callback_reasons reason, void *user,
  98               void *in, size_t len)
  99 {
 100     char client_name[128];
 101     char client_ip[128];
 102     char filename[256];
 103     int n;
 104     struct stat info;
 105
 106     switch (reason) {
 107     case LWS_CALLBACK_HTTP:
 108         if (in && ((char *)in)[0] == '/' && !strstr(in, "..")) {
 109             if (strstr(in, "/icon/") == in) {
 110                 /* virtual directory used for serving up system icons */
 111
 112                 char *icon = (char *)(in + 6);
 113                 const char *path = efreet_icon_path_find(getenv("E_ICON_THEME"),
 114                                                          (const char *)icon, 128);
 115                 if (!path) {
 116                     path = efreet_icon_path_find("default", icon, 128);
 117                     if (!path) {
 118                         path = efreet_icon_path_find("hicolor", icon, 128);
 119                         if (!path) {
 120                             if (icon[0] == '/' && !stat(icon, &info) && S_ISREG(info.st_mode))
 121                                 path = icon;
 122                             else {
 123                                 fprintf(stderr, "Can not find icon: %s\n", icon);
 124                                 path = DEFAULTICON;
 125                             }
 126                         }
 127                     }
 128                 }
 129
 130                 libwebsockets_serve_http_file(wsi, path,
 131                                               (const char *)efreet_mime_type_get((char *)path));
 132             } else {
 133                 snprintf(filename, 256, "%s/%s", LOCAL_RESOURCE_PATH, (char *)in + 1);
 134                 if (strlen((char *)in) == 1)
 135                     /* serve up default content */
 136                     libwebsockets_serve_http_file(wsi, DEFAULTCONTENT, "text/html");
 137                 else if (!stat(filename, &info) && S_ISREG(info.st_mode))
 138                     libwebsockets_serve_http_file(wsi, filename,
 139                                                   (const char *)efreet_mime_type_get((char *)in));
 140                 else
 141                     fprintf(stderr, "Failed to find content: %s\n", (char *)in);
 142             }
 143         } else {
 144             fprintf(stderr, "Invalid request \'%s\'\n", (char *)in);
 145         }
 146         break;
 147
 148     case LWS_CALLBACK_ADD_POLL_FD:
 149         pollfds[count_pollfds].fd = (int)(long)user;
 150         pollfds[count_pollfds].events = (int)len;
 151         pollfds[count_pollfds++].revents = 0;
 152         break;
 153
 154     case LWS_CALLBACK_DEL_POLL_FD:
 155         for (n = 0; n < count_pollfds; n++)
 156             if (pollfds[n].fd == (int)(long)user)
 157                 while (n < count_pollfds) {
 158                     pollfds[n] = pollfds[n + 1];
 159                     n++;
 160                 }
 161         count_pollfds--;
 162         break;
 163
 164     case LWS_CALLBACK_SET_MODE_POLL_FD:
 165         for (n = 0; n < count_pollfds; n++)
 166             if (pollfds[n].fd == (int)(long)user)
 167                 pollfds[n].events |= (int)(long)len;
 168         break;
 169
 170     case LWS_CALLBACK_CLEAR_MODE_POLL_FD:
 171         for (n = 0; n < count_pollfds; n++)
 172             if (pollfds[n].fd == (int)(long)user)
 173                 pollfds[n].events &= ~(int)(long)len;
 174         break;
 175
 176     default:
 177         break;
 178     }
 179
 180     return 0;
 181 }
 182
 183 /* libwebsocket callback for 'protocol-app-list' based websockets */
 184 static int
 185 callback_dialer(struct libwebsocket_context *context,
 186                 struct libwebsocket *wsi,
 187                 enum libwebsocket_callback_reasons reason,
 188                 void *user, void *in, size_t len)
 189 {
 190     json_t *o = NULL;
 191     int i;
 192
 193     switch (reason) {
 194     case LWS_CALLBACK_BROADCAST:
 195         /*
 196          * This is triggered on all open websocket connections
 197          * when libwebsocket_broadcast is called. For this
 198          * protocol we ignore the 'in' paramter and send out
 199          * the pending event queue
 200          */
 201     case LWS_CALLBACK_ESTABLISHED:
 202         if (in) {
 203             printf("About to broadcast:\n%s\n", (char *) in);
 204             unsigned char *b = malloc(LWS_SEND_BUFFER_PRE_PADDING +
 205                                       strlen((char *)in) +
 206                                       LWS_SEND_BUFFER_POST_PADDING);
 207             unsigned char *p = b + LWS_SEND_BUFFER_PRE_PADDING;
 208             int n = sprintf((char *)p, "%s", (char *)in);
 209
 210             libwebsocket_write(wsi, p, n, LWS_WRITE_TEXT);
 211
 212             free(b);
 213         }
 214         break;
 215
 216     case LWS_CALLBACK_RECEIVE:
 217         /*
 218          * The other end of the websocket is sending us text
 219          * so attempt to parse that text as a JSON object providing
 220          * either a single command object or an array of command
 221          * objects.
 222          */
 223         if (in && (o = json_loads((char *)in, 0, NULL))) {
 224             if (json_is_array(o)) {
 225                 for (i = 0; i < json_array_size(o); i++)
 226                     handle_command(json_array_get(o, i));
 227                 json_array_clear(o);
 228             } else {
 229                 handle_command(o);
 230                 json_object_clear(o);
 231             }
 232         }
 233         break;
 234
 235     default:
 236         break;
 237     }
 238
 239     return 0;
 240 }
 241
 242 /* Write a serialized JSON object containing */
 243 /* a list of objects each describing an application */
 244 void send_app_list(struct libwebsocket *socket)
 245 {
 246     /*
 247      * WARNING: libwebsockets requires prefixing and post
 248      *          fixing the send buffer with enough space
 249      *          for the library to insert required websocket
 250      *          protocol information.
 251      *          Ignoring this will result in segfaults.
 252      */
 253     char *dump = json_dumps(app_list, 0);
 254     unsigned char *b = malloc(LWS_SEND_BUFFER_PRE_PADDING +
 255                               strlen(dump) +
 256                               LWS_SEND_BUFFER_POST_PADDING);
 257     unsigned char *p = b + LWS_SEND_BUFFER_PRE_PADDING;
 258     int n = sprintf((char *)p, "%s", dump);
 259
 260     libwebsocket_write(socket, p, n, LWS_WRITE_TEXT);
 261
 262     free(dump);
 263     free(b);
 264 }
 265
 266 /* command object parser */
 267 void handle_command(json_t *o)
 268 {
 269     const char *cmd = json_string_value(json_object_get(o, "cmd"));
 270     if (!cmd)
 271         return;
 272
 273     json_t *tmp;
 274     if (strncmp(cmd, "launch", 6) == 0 && (tmp = json_object_get(o, "index"))) {
 275         int index = json_integer_value(tmp);
 276         json_t *app = json_array_get(app_list, index);
 277         if (!app)
 278             return;
 279
 280         json_t *exec = json_object_get(app, "exec");
 281         if (!exec)
 282             return;
 283
 284         ecore_exe_run(json_string_value(exec), NULL);
 285     }
 286 }
 287
 288 /* libwebsocket callback for 'protocol-app-list' based websockets */
 289 static int
 290 callback_app_list(struct libwebsocket_context *context,
 291                   struct libwebsocket *wsi,
 292                   enum libwebsocket_callback_reasons reason,
 293                   void *user, void *in, size_t len)
 294 {
 295     json_t *o = NULL;
 296     int i;
 297
 298     switch (reason) {
 299     case LWS_CALLBACK_BROADCAST:
 300         /*
 301          * This is triggered on all open websocket connections
 302          * when libwebsocket_broadcast is called. For this
 303          * protocol we only do one possible thing on broadcast
 304          * so just ignore the incoming 'in' string and just
 305          * send a new list of applications.
 306          */
 307     case LWS_CALLBACK_ESTABLISHED:
 308         send_app_list(wsi);
 309         break;
 310
 311     case LWS_CALLBACK_RECEIVE:
 312         /*
 313          * The other end of the websocket is sending us text
 314          * so attempt to parse that text as a JSON object providing
 315          * either a single command object or an array of command
 316          * objects.
 317          */
 318         if (in && (o = json_loads((char *)in, 0, NULL))) {
 319             if (json_is_array(o)) {
 320                 for (i = 0; i < json_array_size(o); i++)
 321                     handle_command(json_array_get(o, i));
 322                 json_array_clear(o);
 323             } else {
 324                 handle_command(o);
 325                 json_object_clear(o);
 326             }
 327         }
 328         break;
 329
 330     default:
 331         break;
 332     }
 333
 334     return 0;
 335 }
 336
 337 void build_app_list(char *dir) {
 338     Eina_Iterator *it;
 339     const char *filename;
 340     const Eina_File_Direct_Info *info;
 341
 342     json_array_clear(app_list);
 343
 344     int index = 0;
 345     it = eina_file_ls(dir);
 346     EINA_ITERATOR_FOREACH(it, filename)
 347         {
 348             if (!eina_str_has_suffix(filename, ".desktop"))
 349                 continue;
 350
 351             Efreet_Desktop *desktop = efreet_desktop_get(filename);
 352             if (!desktop || !desktop->name || !desktop->icon || !desktop->exec)
 353                 continue;
 354
 355             json_t *o = json_object();
 356             json_object_set(o, "id", json_integer(index++));
 357             json_object_set(o, "version", json_string("0.1"));
 358             json_object_set(o, "show", json_boolean(1));
 359             json_object_set(o, "name", json_string(desktop->name));
 360             json_object_set(o, "iconPath", json_string(desktop->icon));
 361             json_object_set(o, "exec", json_string(desktop->exec));
 362             json_array_append(app_list, o);
 363         }
 364     eina_iterator_free(it);
 365 }
 366
 367 #define BUFF_SIZE ((sizeof(struct inotify_event)+FILENAME_MAX)*1024)
 368 static Eina_Bool poll_descriptors(void *data)
 369 {
 370     int n;
 371     ssize_t len, i = 0;
 372     char buff[BUFF_SIZE] = {0};
 373
 374     n = poll(pollfds, count_pollfds, 100);
 375     if (n > -1) {
 376         if (pollfds[0].revents) {
 377             /* The first descriptor what inotify returns*/
 378             len = read(pollfds[0].fd, buff, BUFF_SIZE);
 379             while (i < len) {
 380                 struct inotify_event *pevent = (struct inotify_event *)&buff[i];
 381                 if (pevent->name && eina_str_has_suffix(pevent->name, ".desktop")) {
 382                     build_app_list(apps_directory);
 383
 384                     /* Trigger the broadcast callback for all open connectinos */
 385                     libwebsockets_broadcast(&protocols[PROTOCOL_APP_LIST], "x", 2);
 386                     break;
 387                 }
 388
 389                 i += sizeof(struct inotify_event) + pevent->len;
 390             }
 391         }
 392         if (count_pollfds > 1) {
 393             for (n = 1; n < count_pollfds; n++)
 394                 if (pollfds[n].revents)
 395                     libwebsocket_service_fd(context, &pollfds[n]);
 396         }
 397     }
 398
 399     return ECORE_CALLBACK_RENEW;
 400 }
 401
 402 void call_properties_changed_cb(void *data, DBusMessage *msg)
 403 {
 404     DBusMessageIter iter, value;
 405     const char *property, *v;
 406     char *dump;
 407     int n;
 408     json_t *object;
 409
 410     dbus_message_iter_init(msg, &iter);
 411     dbus_message_iter_get_basic(&iter, &property);
 412
 413     dbus_message_iter_next(&iter);
 414     dbus_message_iter_recurse(&iter, &value);
 415
 416     dbus_message_iter_get_basic(&value, &v);
 417
 418     printf("Call changed: %s=%s\n", property, v);
 419
 420     object = json_object();
 421     json_object_set(object, property, json_string(v));
 422     dump = json_dumps(object, 0);
 423     libwebsockets_broadcast(&protocols[PROTOCOL_DIALER], dump, strlen(dump));
 424     free(dump);
 425 }
 426
 427 void call_added_cb(void *data, DBusMessage *msg)
 428 {
 429     DBusMessageIter iter, properties;
 430     const char *path;
 431
 432     json_t *object = json_object();
 433
 434     dbus_message_iter_init(msg, &iter);
 435     dbus_message_iter_get_basic(&iter, &path);
 436
 437     dbus_message_iter_next(&iter);
 438     dbus_message_iter_recurse(&iter, &properties);
 439
 440     printf("%s :", path);
 441     while (dbus_message_iter_get_arg_type(&properties) == DBUS_TYPE_DICT_ENTRY) {
 442         DBusMessageIter entry, value;
 443         const char *key, *v;
 444
 445         dbus_message_iter_recurse(&properties, &entry);
 446         dbus_message_iter_get_basic(&entry, &key);
 447
 448         dbus_message_iter_next(&entry);
 449         dbus_message_iter_recurse(&entry, &value);
 450
 451         dbus_message_iter_get_basic(&value, &v);
 452
 453         printf(" %s=%s ", key, v);
 454         json_object_set(object, key, json_string(v));
 455
 456         dbus_message_iter_next(&properties);
 457     }
 458     printf("\n");
 459
 460     e_dbus_signal_handler_add(bus,
 461                               "org.ofono",
 462                               path,
 463                               "org.ofono.VoiceCall",
 464                               "PropertyChanged",
 465                               call_properties_changed_cb,
 466                               NULL);
 467
 468     char *dump = json_dumps(object, 0);
 469     libwebsockets_broadcast(&protocols[PROTOCOL_DIALER], dump, strlen(dump));
 470     free(dump);
 471 }
 472
 473 void call_removed_cb(void *data, DBusMessage *msg)
 474 {
 475     json_t *object = json_object();
 476     json_object_set(object, "type", json_string("CallRemoved"));
 477     char *dump = json_dumps(object, 0);
 478     libwebsockets_broadcast(&protocols[PROTOCOL_DIALER], dump, strlen(dump));
 479     free(dump);
 480 }
 481
 482 void
 483 get_modems_reply(void *data, DBusMessage *reply, DBusError *error)
 484 {
 485     DBusMessageIter iter, entry;
 486     if (dbus_error_is_set(error)) {
 487         printf("Error: %s - %s\n", error->name, error->message);
 488         return;
 489     }
 490
 491     dbus_message_iter_init(reply, &iter);
 492     if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY) {
 493         fprintf(stderr, "Unexpeced signature from ofono GetModems call\n");
 494         return;
 495     }
 496
 497     dbus_message_iter_recurse(&iter, &entry);
 498
 499     while (dbus_message_iter_get_arg_type(&entry) == DBUS_TYPE_STRUCT) {
 500         const char *path;
 501         DBusMessageIter item, properties;
 502
 503         dbus_message_iter_recurse(&entry, &item);
 504         dbus_message_iter_get_basic(&item, &path);
 505
 506         dbus_message_iter_next(&item);
 507         dbus_message_iter_recurse(&item, &properties);
 508
 509         while (dbus_message_iter_get_arg_type(&properties) == DBUS_TYPE_DICT_ENTRY) {
 510             const char *key;
 511             DBusMessageIter interfaces, value, entry;
 512
 513             dbus_message_iter_recurse(&properties, &entry);
 514             dbus_message_iter_get_basic(&entry, &key);
 515
 516             dbus_message_iter_next(&entry);
 517             dbus_message_iter_recurse(&entry, &value);
 518
 519             if (!strcasecmp(key, "Interfaces")) {
 520                 dbus_message_iter_recurse(&value, &interfaces);
 521                 while (dbus_message_iter_get_arg_type(&interfaces) ==
 522                        DBUS_TYPE_STRING) {
 523                     const char *iface;
 524
 525                     dbus_message_iter_get_basic(&interfaces, &iface);
 526
 527                     if (!strcasecmp(iface, "org.ofono.VoiceCallManager")) {
 528                         printf("Listening for calls on %s\n", path);
 529                         e_dbus_signal_handler_add(bus, "org.ofono",
 530                                                   path, iface, "CallAdded",
 531                                                   call_added_cb, NULL);
 532                         e_dbus_signal_handler_add(bus, "org.ofono",
 533                                                   path, iface,
 534                                                   "CallRemoved",
 535                                                   call_removed_cb, NULL);
 536                     }
 537
 538                     dbus_message_iter_next(&interfaces);
 539                 }
 540             }
 541
 542             dbus_message_iter_next(&properties);
 543         }
 544
 545         dbus_message_iter_next(&entry);
 546     }
 547 }
 548
 549
 550 static struct option options[] = {
 551     { "help",      no_argument,         NULL, 'h' },
 552     { "port",      required_argument,   NULL, 'p' },
 553     { "directory", required_argument,   NULL, 'd' },
 554     { NULL, 0, 0, 0 }
 555 };
 556
 557 int main(int argc, char **argv)
 558 {
 559     int fd;
 560     int n = 0;
 561     int port = 7681;
 562     int opts = 0;
 563
 564     eina_init();
 565     ecore_init();
 566     e_dbus_init();
 567     efreet_init();
 568     efreet_mime_init();
 569     ecore_app_args_set(argc, (const char **)argv);
 570
 571     /* parse command-line options */
 572     while (n >= 0) {
 573         n = getopt_long(argc, argv, "hp:d:", options, NULL);
 574         if (n < 0)
 575             continue;
 576         switch (n) {
 577         case 'd':
 578             apps_directory = strdup(optarg);
 579             break;
 580         case 'p':
 581             port = atoi(optarg);
 582             break;
 583         case 'h':
 584             fprintf(stderr, "Usage: %s [--port=<p>] [--directory=<d>]\n", argv[0]);
 585             exit(-1);
 586         }
 587     }
 588     if (!apps_directory)
 589         apps_directory = APPDIR;
 590
 591     /* Initialize and build up the application list */
 592     app_list = json_array();
 593     build_app_list(apps_directory);
 594
 595     bus = e_dbus_bus_get(DBUS_BUS_SYSTEM);
 596
 597     /* Start listening for incoming phone calls */
 598     DBusMessage *msg;
 599     msg = dbus_message_new_method_call(
 600                                        "org.ofono",
 601                                        "/",
 602                                        "org.ofono.Manager",
 603                                        "GetModems"
 604                                        );
 605     e_dbus_message_send(bus, msg, get_modems_reply, -1, NULL);
 606
 607
 608     /* Listen for updates on application desktop files*/
 609     fd = inotify_init();
 610     inotify_add_watch(fd, APPDIR, IN_CREATE | IN_DELETE | IN_MODIFY);
 611     pollfds[0].fd = fd;
 612     pollfds[0].events = POLLIN;
 613     pollfds[0].revents = 0;
 614     count_pollfds = 1;
 615
 616     /* Start listening for incoming websocket connections */
 617     context = libwebsocket_create_context(port, NULL, protocols,
 618                                           libwebsocket_internal_extensions,
 619                                           NULL, NULL, -1, -1, opts);
 620     if (context == NULL) {
 621         fprintf(stderr, "libwebsocket init failed\n");
 622         return -1;
 623     }
 624
 625     ecore_idler_add(poll_descriptors, NULL);
 626
 627     ecore_main_loop_begin();
 628
 629     /* cleanup */
 630     libwebsocket_context_destroy(context);
 631     ecore_shutdown();
 632     return 0;
 633 }
 634
 635 /* Local Variables:      */
 636 /* mode:c                */
 637 /* c-basic-offset:4      */
 638 /* indent-tabs-mode: nil */
 639 /* End:                  */