Indicate scanning state while not associated
[connman] / plugins / wifi.c
1 /*
2  *
3  *  Connection Manager
4  *
5  *  Copyright (C) 2007-2008  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 <stdio.h>
27 #include <unistd.h>
28 #include <string.h>
29 #include <sys/ioctl.h>
30 #include <sys/socket.h>
31 #include <linux/if_arp.h>
32 #include <linux/wireless.h>
33
34 #include <gdbus.h>
35
36 #include <connman/plugin.h>
37 #include <connman/driver.h>
38 #include <connman/rtnl.h>
39 #include <connman/log.h>
40
41 #include "inet.h"
42 #include "supplicant.h"
43
44 #define CLEANUP_TIMEOUT   8     /* in seconds */
45 #define INACTIVE_TIMEOUT  12    /* in seconds */
46
47 struct wifi_data {
48         GSList *current;
49         GSList *pending;
50         guint cleanup_timer;
51         guint inactive_timer;
52         gchar *identifier;
53         gboolean connected;
54 };
55
56 static int network_probe(struct connman_element *element)
57 {
58         DBG("element %p name %s", element, element->name);
59
60         return 0;
61 }
62
63 static void network_remove(struct connman_element *element)
64 {
65         DBG("element %p name %s", element, element->name);
66 }
67
68 static int network_enable(struct connman_element *element)
69 {
70         struct connman_element *device = element->parent;
71         char *name, *security = NULL, *passphrase = NULL;
72         unsigned char *ssid;
73         int ssid_len;
74
75         DBG("element %p name %s", element, element->name);
76
77         if (connman_element_get_static_property(element,
78                                                 "Name", &name) == FALSE)
79                 return -EIO;
80
81         if (connman_element_get_static_array_property(element,
82                                 "WiFi.SSID", &ssid, &ssid_len) == FALSE)
83                 return -EIO;
84
85         if (device != NULL) {
86                 struct wifi_data *data = connman_element_get_data(device);
87
88                 if (data != NULL) {
89                         if (data->connected == TRUE)
90                                 return -EBUSY;
91
92                         g_free(data->identifier);
93                         data->identifier = g_strdup(name);
94                 }
95         }
96
97         connman_element_get_value(element,
98                         CONNMAN_PROPERTY_ID_WIFI_SECURITY, &security);
99
100         connman_element_get_value(element,
101                         CONNMAN_PROPERTY_ID_WIFI_PASSPHRASE, &passphrase);
102
103         DBG("name %s security %s passhprase %s",
104                                         name, security, passphrase);
105
106         if (__supplicant_connect(element, ssid, ssid_len,
107                                                 security, passphrase) < 0)
108                 connman_error("Failed to initiate connect");
109
110         return 0;
111 }
112
113 static int network_disable(struct connman_element *element)
114 {
115         DBG("element %p name %s", element, element->name);
116
117         connman_element_unregister_children(element);
118
119         __supplicant_disconnect(element);
120
121         return 0;
122 }
123
124 static struct connman_driver network_driver = {
125         .name           = "wifi-network",
126         .type           = CONNMAN_ELEMENT_TYPE_NETWORK,
127         .subtype        = CONNMAN_ELEMENT_SUBTYPE_WIFI,
128         .probe          = network_probe,
129         .remove         = network_remove,
130         .enable         = network_enable,
131         .disable        = network_disable,
132 };
133
134 static struct connman_element *find_current_element(struct wifi_data *data,
135                                                         const char *identifier)
136 {
137         GSList *list;
138
139         for (list = data->current; list; list = list->next) {
140                 struct connman_element *element = list->data;
141
142                 if (connman_element_match_static_property(element,
143                                         "Name", &identifier) == TRUE)
144                         return element;
145         }
146
147         return NULL;
148 }
149
150 static struct connman_element *find_pending_element(struct wifi_data *data,
151                                                         const char *identifier)
152 {
153         GSList *list;
154
155         for (list = data->pending; list; list = list->next) {
156                 struct connman_element *element = list->data;
157
158                 if (connman_element_match_static_property(element,
159                                         "Name", &identifier) == TRUE)
160                         return element;
161         }
162
163         return NULL;
164 }
165
166 static gboolean inactive_scan(gpointer user_data)
167 {
168         struct connman_element *device = user_data;
169         struct wifi_data *data = connman_element_get_data(device);
170
171         DBG("");
172
173         if (data->cleanup_timer > 0) {
174                 g_source_remove(data->cleanup_timer);
175                 data->cleanup_timer = 0;
176         }
177
178         __supplicant_scan(device);
179
180         data->inactive_timer = 0;
181
182         return FALSE;
183 }
184
185 static void connect_known_networks(struct connman_element *device)
186 {
187         struct wifi_data *data = connman_element_get_data(device);
188         GSList *list;
189
190         DBG("");
191
192         if (data->inactive_timer > 0) {
193                 g_source_remove(data->inactive_timer);
194                 data->inactive_timer = 0;
195         }
196
197         for (list = data->current; list; list = list->next) {
198                 struct connman_element *element = list->data;
199
200                 if (element->policy == CONNMAN_ELEMENT_POLICY_AUTO &&
201                                                 element->remember == TRUE &&
202                                                 element->available == TRUE) {
203                         if (network_enable(element) == 0)
204                                 return;
205                 }
206         }
207
208         data->inactive_timer = g_timeout_add_seconds(INACTIVE_TIMEOUT,
209                                                         inactive_scan, device);
210 }
211
212 static void state_change(struct connman_element *device,
213                                                 enum supplicant_state state)
214 {
215         struct wifi_data *data = connman_element_get_data(device);
216         struct connman_element *element;
217
218         DBG("state %d", state);
219
220         if (state == STATE_SCANNING)
221                 connman_element_set_scanning(device, TRUE);
222         else
223                 connman_element_set_scanning(device, FALSE);
224
225         if (data == NULL)
226                 return;
227
228         if (data->identifier == NULL)
229                 goto reconnect;
230
231         element = find_current_element(data, data->identifier);
232         if (element == NULL)
233                 goto reconnect;
234
235         if (state == STATE_COMPLETED) {
236                 struct connman_element *dhcp;
237
238                 data->connected = TRUE;
239                 connman_element_set_enabled(element, TRUE);
240
241                 dhcp = connman_element_create(NULL);
242
243                 dhcp->type = CONNMAN_ELEMENT_TYPE_DHCP;
244                 dhcp->index = element->index;
245
246                 connman_element_register(dhcp, element);
247         } else if (state == STATE_INACTIVE || state == STATE_DISCONNECTED) {
248                 data->connected = FALSE;
249                 connman_element_set_enabled(element, FALSE);
250
251                 connman_element_unregister_children(element);
252         }
253
254 reconnect:
255         if (state == STATE_INACTIVE) {
256                 data->connected = FALSE;
257                 connect_known_networks(device);
258         }
259 }
260
261 static gboolean cleanup_pending(gpointer user_data)
262 {
263         struct wifi_data *data = user_data;
264         GSList *list;
265
266         DBG("");
267
268         for (list = data->pending; list; list = list->next) {
269                 struct connman_element *element = list->data;
270
271                 DBG("element %p name %s", element, element->name);
272
273                 connman_element_unregister(element);
274                 connman_element_unref(element);
275         }
276
277         g_slist_free(data->pending);
278         data->pending = NULL;
279
280         data->cleanup_timer = 0;
281
282         return FALSE;
283 }
284
285 static void clear_results(struct connman_element *device)
286 {
287         struct wifi_data *data = connman_element_get_data(device);
288
289         DBG("pending %d", g_slist_length(data->pending));
290         DBG("current %d", g_slist_length(data->current));
291
292         data->pending = data->current;
293         data->current = NULL;
294
295         if (data->cleanup_timer > 0)
296                 return;
297
298         data->cleanup_timer = g_timeout_add_seconds(CLEANUP_TIMEOUT,
299                                                         cleanup_pending, data);
300 }
301
302 static void scan_result(struct connman_element *device,
303                                         struct supplicant_network *network)
304 {
305         struct wifi_data *data = connman_element_get_data(device);
306         struct connman_element *element;
307         gchar *temp;
308         int i;
309
310         DBG("network %p identifier %s", network, network->identifier);
311
312         if (data == NULL)
313                 return;
314
315         if (network->identifier == NULL)
316                 return;
317
318         if (network->identifier[0] == '\0')
319                 return;
320
321         temp = g_strdup(network->identifier);
322
323         for (i = 0; i < strlen(temp); i++) {
324                 char tmp = temp[i];
325                 if ((tmp < '0' || tmp > '9') && (tmp < 'A' || tmp > 'Z') &&
326                                                 (tmp < 'a' || tmp > 'z'))
327                         temp[i] = '_';
328         }
329
330         element = find_pending_element(data, network->identifier);
331         if (element == NULL) {
332                 element = connman_element_create(temp);
333
334                 element->type = CONNMAN_ELEMENT_TYPE_NETWORK;
335                 element->index = device->index;
336
337                 connman_element_add_static_property(element, "Name",
338                                 DBUS_TYPE_STRING, &network->identifier);
339
340                 connman_element_add_static_array_property(element, "WiFi.SSID",
341                         DBUS_TYPE_BYTE, &network->ssid, network->ssid_len);
342
343                 if (element->wifi.security == NULL) {
344                         const char *security;
345
346                         if (network->has_rsn == TRUE)
347                                 security = "wpa2";
348                         else if (network->has_wpa == TRUE)
349                                 security = "wpa";
350                         else if (network->has_wep == TRUE)
351                                 security = "wep";
352                         else
353                                 security = "none";
354
355                         element->wifi.security = g_strdup(security);
356                 }
357
358                 element->strength = network->quality;
359
360                 connman_element_add_static_property(element, "Strength",
361                                         DBUS_TYPE_BYTE, &element->strength);
362
363                 DBG("%s (%s) strength %d", network->identifier,
364                                 element->wifi.security, element->strength);
365
366                 connman_element_register(element, device);
367         } else {
368                 data->pending = g_slist_remove(data->pending, element);
369
370                 if (element->strength != network->quality) {
371                         element->strength = network->quality;
372
373                         connman_element_set_static_property(element, "Strength",
374                                         DBUS_TYPE_BYTE, &element->strength);
375
376                         connman_element_update(element);
377                 }
378         }
379
380         data->current = g_slist_append(data->current, element);
381
382         element->available = TRUE;
383
384         g_free(temp);
385 }
386
387 static struct supplicant_callback wifi_callback = {
388         .state_change   = state_change,
389         .clear_results  = clear_results,
390         .scan_result    = scan_result,
391 };
392
393 static int wifi_probe(struct connman_element *element)
394 {
395         struct wifi_data *data;
396
397         DBG("element %p name %s", element, element->name);
398
399         data = g_try_new0(struct wifi_data, 1);
400         if (data == NULL)
401                 return -ENOMEM;
402
403         data->connected = FALSE;
404
405         connman_element_set_data(element, data);
406
407         return 0;
408 }
409
410 static void wifi_remove(struct connman_element *element)
411 {
412         struct wifi_data *data = connman_element_get_data(element);
413
414         DBG("element %p name %s", element, element->name);
415
416         connman_element_set_data(element, NULL);
417
418         g_free(data->identifier);
419         g_free(data);
420 }
421
422 static int wifi_update(struct connman_element *element)
423 {
424         DBG("element %p name %s", element, element->name);
425
426         __supplicant_scan(element);
427
428         return 0;
429 }
430
431 static int wifi_enable(struct connman_element *element)
432 {
433         int err;
434
435         DBG("element %p name %s", element, element->name);
436
437         err = __supplicant_start(element, &wifi_callback);
438         if (err < 0)
439                 return err;
440
441         __supplicant_scan(element);
442
443         return 0;
444 }
445
446 static int wifi_disable(struct connman_element *element)
447 {
448         struct wifi_data *data = connman_element_get_data(element);
449         GSList *list;
450
451         DBG("element %p name %s", element, element->name);
452
453         if (data->cleanup_timer > 0) {
454                 g_source_remove(data->cleanup_timer);
455                 data->cleanup_timer = 0;
456         }
457
458         if (data->inactive_timer > 0) {
459                 g_source_remove(data->inactive_timer);
460                 data->inactive_timer = 0;
461         }
462
463         __supplicant_disconnect(element);
464
465         for (list = data->pending; list; list = list->next) {
466                 struct connman_element *network = list->data;
467
468                 connman_element_unref(network);
469         }
470
471         g_slist_free(data->pending);
472         data->pending = NULL;
473
474         for (list = data->current; list; list = list->next) {
475                 struct connman_element *network = list->data;
476
477                 connman_element_unref(network);
478         }
479
480         g_slist_free(data->current);
481         data->current = NULL;
482
483         connman_element_unregister_children(element);
484
485         __supplicant_stop(element);
486
487         return 0;
488 }
489
490 static struct connman_driver wifi_driver = {
491         .name           = "wifi-device",
492         .type           = CONNMAN_ELEMENT_TYPE_DEVICE,
493         .subtype        = CONNMAN_ELEMENT_SUBTYPE_WIFI,
494         .probe          = wifi_probe,
495         .remove         = wifi_remove,
496         .update         = wifi_update,
497         .enable         = wifi_enable,
498         .disable        = wifi_disable,
499 };
500
501 static GSList *device_list = NULL;
502
503 static void wifi_newlink(unsigned short type, int index,
504                                         unsigned flags, unsigned change)
505 {
506         struct connman_element *device;
507         GSList *list;
508         gboolean exists = FALSE;
509         gchar *name, *devname;
510         struct iwreq iwr;
511         int sk;
512
513         DBG("index %d", index);
514
515         if (type != ARPHRD_ETHER)
516                 return;
517
518         name = inet_index2ident(index, "dev_");
519         devname = inet_index2name(index);
520
521         memset(&iwr, 0, sizeof(iwr));
522         strncpy(iwr.ifr_ifrn.ifrn_name, devname, IFNAMSIZ);
523
524         sk = socket(PF_INET, SOCK_DGRAM, 0);
525
526         if (ioctl(sk, SIOCGIWNAME, &iwr) < 0) {
527                 g_free(name);
528                 close(sk);
529                 return;
530         }
531
532         close(sk);
533
534         for (list = device_list; list; list = list->next) {
535                 struct connman_element *device = list->data;
536
537                 if (device->index == index) {
538                         exists = TRUE;
539                         break;
540                 }
541         }
542
543         if (exists == TRUE) {
544                 g_free(name);
545                 return;
546         }
547
548         device = connman_element_create(NULL);
549         device->type = CONNMAN_ELEMENT_TYPE_DEVICE;
550         device->subtype = CONNMAN_ELEMENT_SUBTYPE_WIFI;
551
552         device->index = index;
553         device->name = name;
554         device->devname = devname;
555
556         connman_element_register(device, NULL);
557         device_list = g_slist_append(device_list, device);
558 }
559
560 static void wifi_dellink(unsigned short type, int index,
561                                         unsigned flags, unsigned change)
562 {
563         GSList *list;
564
565         DBG("index %d", index);
566
567         for (list = device_list; list; list = list->next) {
568                 struct connman_element *device = list->data;
569
570                 if (device->index == index) {
571                         device_list = g_slist_remove(device_list, device);
572                         connman_element_unregister(device);
573                         connman_element_unref(device);
574                         break;
575                 }
576         }
577 }
578
579 static struct connman_rtnl wifi_rtnl = {
580         .name           = "wifi",
581         .newlink        = wifi_newlink,
582         .dellink        = wifi_dellink,
583 };
584
585 static void supplicant_connect(DBusConnection *connection, void *user_data)
586 {
587         DBG("connection %p", connection);
588
589         __supplicant_init(connection);
590
591         if (connman_rtnl_register(&wifi_rtnl) < 0)
592                 return;
593
594         connman_rtnl_send_getlink();
595 }
596
597 static void supplicant_disconnect(DBusConnection *connection, void *user_data)
598 {
599         GSList *list;
600
601         DBG("connection %p", connection);
602
603         connman_rtnl_unregister(&wifi_rtnl);
604
605         for (list = device_list; list; list = list->next) {
606                 struct connman_element *device = list->data;
607
608                 connman_element_unregister(device);
609                 connman_element_unref(device);
610         }
611
612         g_slist_free(device_list);
613         device_list = NULL;
614
615         __supplicant_exit();
616 }
617
618 static DBusConnection *connection;
619 static guint watch;
620
621 static int wifi_init(void)
622 {
623         int err;
624
625         connection = dbus_bus_get(DBUS_BUS_SYSTEM, NULL);
626         if (connection == NULL)
627                 return -EIO;
628
629         err = connman_driver_register(&network_driver);
630         if (err < 0) {
631                 dbus_connection_unref(connection);
632                 return err;
633         }
634
635         err = connman_driver_register(&wifi_driver);
636         if (err < 0) {
637                 connman_driver_unregister(&network_driver);
638                 dbus_connection_unref(connection);
639                 return err;
640         }
641
642         watch = g_dbus_add_service_watch(connection, SUPPLICANT_NAME,
643                         supplicant_connect, supplicant_disconnect, NULL, NULL);
644
645         if (g_dbus_check_service(connection, SUPPLICANT_NAME) == TRUE)
646                 supplicant_connect(connection, NULL);
647
648         return 0;
649 }
650
651 static void wifi_exit(void)
652 {
653         connman_driver_unregister(&network_driver);
654         connman_driver_unregister(&wifi_driver);
655
656         if (watch > 0)
657                 g_dbus_remove_watch(connection, watch);
658
659         supplicant_disconnect(connection, NULL);
660
661         dbus_connection_unref(connection);
662 }
663
664 CONNMAN_PLUGIN_DEFINE(wifi, "WiFi interface plugin", VERSION,
665                                                         wifi_init, wifi_exit)