/
usb_moded-network.c
1305 lines (1140 loc) · 42.2 KB
/
usb_moded-network.c
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
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
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
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
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
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
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
369
370
371
372
373
374
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
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
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
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
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
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* @file usb-moded_network.c : (De)activates network depending on the network setting system.
*
* Copyright (C) 2011 Nokia Corporation. All rights reserved.
* Copyright (C) 2012-2019 Jolla. All rights reserved.
*
* @author: Philippe De Swert <philippe.de-swert@nokia.com>
* @author: Philippe De Swert <philippedeswert@gmail.com>
* @author: Philippe De Swert <philippe.deswert@jollamobile.com>
* @author: Marko Saukko <marko.saukko@jollamobile.com>
* @author: Slava Monich <slava.monich@jolla.com>
* @author: Simo Piiroinen <simo.piiroinen@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
*/
/*============================================================================= */
#include "usb_moded-network.h"
#include "usb_moded-config-private.h"
#include "usb_moded-control.h"
#include "usb_moded-log.h"
#include "usb_moded-modesetting.h"
#include "usb_moded-worker.h"
#include <sys/stat.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#if CONNMAN || OFONO
# include <dbus/dbus.h>
#endif
/* ========================================================================= *
* Constants
* ========================================================================= */
#define UDHCP_CONFIG_PATH "/run/usb-moded/udhcpd.conf"
#define UDHCP_CONFIG_DIR "/run/usb-moded"
#define UDHCP_CONFIG_LINK "/etc/udhcpd.conf"
/* ========================================================================= *
* Types
* ========================================================================= */
/** IP forwarding configuration block */
typedef struct ipforward_data_t
{
/** Address of primary DNS */
char *dns1;
/** Address of secondary DNS */
char *dns2;
/** Interface from which packets should be forwarded */
char *nat_interface;
}ipforward_data_t;
/* ========================================================================= *
* Prototypes
* ========================================================================= */
/* ------------------------------------------------------------------------- *
* NETWORK
* ------------------------------------------------------------------------- */
static void network_free_ipforward_data (ipforward_data_t *ipforward);
static int network_check_interface (char *interface);
static char *network_get_interface (modedata_t *data);
static int network_set_usb_ip_forward (modedata_t *data, ipforward_data_t *ipforward);
static void network_clean_usb_ip_forward(void);
static int network_checklink (void);
static int network_write_udhcpd_conf (ipforward_data_t *ipforward, modedata_t *data);
int network_set_up_dhcpd (modedata_t *data);
int network_up (modedata_t *data);
int network_down (modedata_t *data);
int network_update (void);
/* ------------------------------------------------------------------------- *
* UTILITY
* ------------------------------------------------------------------------- */
#ifdef OFONO
static int get_roaming (void);
#endif // OFONO
#if CONNMAN_WORKS_BETTER
static int append_variant(DBusMessageIter *iter, const char *property, int type, const char *value);
#endif // CONNMAN_WORKS_BETTER
/* ------------------------------------------------------------------------- *
* CONNMAN
* ------------------------------------------------------------------------- */
static gboolean connman_try_set_tethering (DBusConnection *connection, const char *path, gboolean on);
gboolean connman_set_tethering (const char *path, gboolean on);
static char *connman_parse_manager_reply (DBusMessage *reply, const char *req_service);
static int connman_fill_connection_data(DBusMessage *reply, ipforward_data_t *ipforward);
static int connman_set_cellular_online (DBusConnection *dbus_conn_connman, const char *service, int retry);
static int connman_wifi_power_control (DBusConnection *dbus_conn_connman, int on);
static int connman_get_connection_data (ipforward_data_t *ipforward);
static int connman_reset_state (void);
/* ========================================================================= *
* Data
* ========================================================================= */
static const char default_interface[] = "usb0";
/* ========================================================================= *
* Functions
* ========================================================================= */
static void network_free_ipforward_data (ipforward_data_t *ipforward)
{
LOG_REGISTER_CONTEXT;
if(ipforward)
{
if(ipforward->dns1)
free(ipforward->dns1);
if(ipforward->dns2)
free(ipforward->dns2);
if(ipforward->nat_interface)
free(ipforward->nat_interface);
free(ipforward);
}
}
/* This function checks if the configured interface exists */
static int network_check_interface(char *interface)
{
LOG_REGISTER_CONTEXT;
int ret = -1;
if(interface)
{
char path[256];
snprintf(path, sizeof path, "/sys/class/net/%s", interface);
ret = access(path, F_OK);
}
return ret;
}
static char* network_get_interface(modedata_t *data)
{
LOG_REGISTER_CONTEXT;
(void)data; // FIXME: why is this passed in the 1st place?
char *interface = 0;
char *setting = config_get_network_setting(NETWORK_INTERFACE_KEY);
if(network_check_interface(setting) == 0)
{
/* Use the configured value */
interface = setting, setting = 0;
}
else
{
/* Fall back to default value */
interface = strdup(default_interface);
if(network_check_interface(interface) != 0)
{
log_warning("Neither configured %s nor fallback %s interface exists."
" Check your config!",
setting ?: "NULL",
interface ?: "NULL");
free(interface), interface = 0;
}
}
log_debug("interface = %s\n", interface ?: "NULL");
free(setting);
return interface;
}
/**
* Turn on ip forwarding on the usb interface
* @return: 0 on success, 1 on failure
*/
static int network_set_usb_ip_forward(modedata_t *data, ipforward_data_t *ipforward)
{
LOG_REGISTER_CONTEXT;
char *interface, *nat_interface;
char command[128];
interface = network_get_interface(data);
if(interface == NULL)
return 1;
nat_interface = config_get_network_setting(NETWORK_NAT_INTERFACE_KEY);
if((nat_interface == NULL) && (ipforward->nat_interface != NULL))
nat_interface = strdup(ipforward->nat_interface);
else
{
log_debug("No nat interface available!\n");
#ifdef CONNMAN
/* in case the cellular did not come up we want to make sure wifi gets restored */
connman_reset_state();
#endif
free(interface);
free(nat_interface);
return 1;
}
write_to_file("/proc/sys/net/ipv4/ip_forward", "1");
snprintf(command, 128, "/sbin/iptables -t nat -A POSTROUTING -o %s -j MASQUERADE", nat_interface);
common_system(command);
snprintf(command, 128, "/sbin/iptables -A FORWARD -i %s -o %s -m state --state RELATED,ESTABLISHED -j ACCEPT", nat_interface, interface);
common_system(command);
snprintf(command, 128, "/sbin/iptables -A FORWARD -i %s -o %s -j ACCEPT", interface, nat_interface);
common_system(command);
free(interface);
free(nat_interface);
log_debug("ipforwarding success!\n");
return 0;
}
/**
* Remove ip forward
*/
static void network_clean_usb_ip_forward(void)
{
LOG_REGISTER_CONTEXT;
#ifdef CONNMAN
connman_reset_state();
#endif
write_to_file("/proc/sys/net/ipv4/ip_forward", "0");
common_system("/sbin/iptables -F FORWARD");
}
#ifdef OFONO
/**
* Get roaming data from ofono
*
* @return : 1 if roaming, 0 when not (or when ofono is unavailable)
*/
static int get_roaming(void)
{
LOG_REGISTER_CONTEXT;
int ret = 0, type;
DBusError error;
DBusMessage *msg = NULL, *reply;
DBusConnection *dbus_conn_ofono = NULL;
char *modem = NULL;
DBusMessageIter iter, subiter;
dbus_error_init(&error);
if( (dbus_conn_ofono = dbus_bus_get(DBUS_BUS_SYSTEM, &error)) == 0 )
{
log_err("Could not connect to dbus for ofono\n");
}
/* find the modem object path so can find out if it is roaming or not (one modem only is assumed) */
if ((msg = dbus_message_new_method_call("org.ofono", "/", "org.ofono.Manager", "GetModems")) != NULL)
{
if ((reply = dbus_connection_send_with_reply_and_block(dbus_conn_ofono, msg, -1, NULL)) != NULL)
{
dbus_message_iter_init(reply, &iter);
dbus_message_iter_recurse(&iter, &subiter);
iter = subiter;
dbus_message_iter_recurse(&iter, &subiter);
type = dbus_message_iter_get_arg_type(&subiter);
if(type == DBUS_TYPE_OBJECT_PATH)
{
dbus_message_iter_get_basic(&subiter, &modem);
log_debug("modem = %s\n", modem);
}
dbus_message_unref(reply);
}
dbus_message_unref(msg);
}
/* if modem found then we check roaming state */
if(modem != NULL)
{
if ((msg = dbus_message_new_method_call("org.ofono", modem, "org.ofono.NetworkRegistration", "GetProperties")) != NULL)
{
if ((reply = dbus_connection_send_with_reply_and_block(dbus_conn_ofono, msg, -1, NULL)) != NULL)
{
dbus_message_iter_init(reply, &iter);
dbus_message_iter_recurse(&iter, &subiter);
iter = subiter;
dbus_message_iter_recurse(&iter, &subiter);
type = dbus_message_iter_get_arg_type(&subiter);
if(type == DBUS_TYPE_STRING)
{
dbus_message_iter_next (&subiter);
iter = subiter;
dbus_message_iter_recurse(&iter, &subiter);
dbus_message_iter_get_basic(&subiter, &modem);
log_debug("modem status = %s\n", modem);
}
}
dbus_message_unref(reply);
}
dbus_message_unref(msg);
if(!strcmp("roaming", modem))
ret = 1;
}
return ret;
}
#endif
#ifndef CONNMAN
/**
* Read dns settings from /etc/resolv.conf
*/
static int resolv_conf_dns(ipforward_data_t *ipforward)
{
LOG_REGISTER_CONTEXT;
FILE *resolv;
int i = 0, count = 0;
char *line = NULL, **tokens;
size_t len = 0;
ssize_t read;
resolv = fopen("/etc/resolv.conf", "r");
if (resolv == NULL)
return 1;
/* we don't expect more than 10 lines in /etc/resolv.conf */
for (i=0; i < 10; i++)
{
read = getline(&line, &len, resolv);
if(read)
{
if(strstr(line, "nameserver") != NULL)
{
tokens = g_strsplit(line, " ", 2);
if(count == 0)
ipforward->dns1 = strdup(tokens[1]);
else
ipforward->dns2 = strdup(tokens[1]);
count++;
g_strfreev(tokens);
}
}
if(count == 2)
goto end;
}
end:
free(line);
fclose(resolv);
return 0;
}
#endif
static int network_checklink(void)
{
LOG_REGISTER_CONTEXT;
int ret = -1;
char dest[sizeof UDHCP_CONFIG_PATH + 1];
size_t len = readlink(UDHCP_CONFIG_LINK, dest, sizeof dest - 1);
if (len > 0)
{
dest[len] = 0;
ret = strcmp(dest, UDHCP_CONFIG_PATH);
}
return ret;
}
/**
* Write udhcpd.conf
* @ipforward : NULL if we want a simple config, otherwise include dns info etc...
*/
static int network_write_udhcpd_conf(ipforward_data_t *ipforward, modedata_t *data)
{
LOG_REGISTER_CONTEXT;
FILE *conffile;
char *ip, *interface, *netmask;
char *ipstart, *ipend;
int dot = 0, i = 0, test;
struct stat st;
/* /tmp and /run is often tmpfs, so we avoid writing to flash */
mkdir(UDHCP_CONFIG_DIR, 0664);
conffile = fopen(UDHCP_CONFIG_PATH, "w");
if(conffile == NULL)
{
log_debug("Error creating "UDHCP_CONFIG_PATH"!\n");
return 1;
}
interface = network_get_interface(data);
if(interface == NULL)
{
fclose(conffile);
return 1;
}
/* generate start and end ip based on the setting */
ip = config_get_network_setting(NETWORK_IP_KEY);
ipstart = malloc(15);
ipend = malloc(15);
while(i < 15)
{
if(dot < 3)
{
if(ip[i] == '.')
dot ++;
ipstart[i] = ip[i];
ipend[i] = ip[i];
}
else
{
ipstart[i] = '\0';
ipend[i] = '\0';
break;
}
i++;
}
strcat(ipstart,"1");
strcat(ipend, "15");
netmask = config_get_network_setting(NETWORK_NETMASK_KEY);
/* print all data in the file */
fprintf(conffile, "start\t%s\n", ipstart);
fprintf(conffile, "end\t%s\n", ipend);
fprintf(conffile, "interface\t%s\n", interface);
fprintf(conffile, "option\tsubnet\t%s\n", netmask);
fprintf(conffile, "option\tlease\t3600\n");
fprintf(conffile, "max_leases\t15\n");
if(ipforward != NULL)
{
if(!ipforward->dns1 || !ipforward->dns2)
{
log_debug("No dns info!");
}
else
fprintf(conffile, "opt\tdns\t%s %s\n", ipforward->dns1, ipforward->dns2);
fprintf(conffile, "opt\trouter\t%s\n", ip);
}
free(ipstart);
free(ipend);
free(ip);
free(interface);
free(netmask);
fclose(conffile);
/* check if it is a symlink, if not remove and link, create the link if missing */
test = lstat(UDHCP_CONFIG_LINK, &st);
/* if stat fails there is no file or link */
if(test == -1)
goto link;
/* if it is not a link, or points to the wrong place we remove it */
if(((st.st_mode & S_IFMT) != S_IFLNK) || network_checklink())
{
unlink(UDHCP_CONFIG_LINK);
}
else
goto end;
link:
if (symlink(UDHCP_CONFIG_PATH, UDHCP_CONFIG_LINK) == -1)
{
log_debug("Error creating link "UDHCP_CONFIG_LINK" -> "UDHCP_CONFIG_PATH": %m\n");
unlink(UDHCP_CONFIG_PATH);
return 1;
}
end:
log_debug(UDHCP_CONFIG_LINK" created\n");
return 0;
}
#ifdef CONNMAN
# define CONNMAN_SERVICE "net.connman"
# define CONNMAN_TECH_INTERFACE "net.connman.Technology"
# define CONNMAN_ERROR_INTERFACE CONNMAN_SERVICE ".Error"
# define CONNMAN_ERROR_ALREADY_ENABLED CONNMAN_ERROR_INTERFACE ".AlreadyEnabled"
# define CONNMAN_ERROR_ALREADY_DISABLED CONNMAN_ERROR_INTERFACE ".AlreadyDisabled"
/*
* Configures tethering for the specified connman technology.
*/
static gboolean connman_try_set_tethering(DBusConnection *connection, const char *path, gboolean on)
{
LOG_REGISTER_CONTEXT;
gboolean ok = FALSE;
DBusMessage *message = dbus_message_new_method_call(CONNMAN_SERVICE, path, CONNMAN_TECH_INTERFACE, "SetProperty");
if (message)
{
DBusMessage *reply;
DBusMessageIter iter;
DBusMessageIter iter2;
DBusError error;
const char* key = "Tethering";
dbus_bool_t value = (on != FALSE);
dbus_message_iter_init_append(message, &iter);
dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &key);
dbus_message_iter_open_container(&iter, DBUS_TYPE_VARIANT, DBUS_TYPE_BOOLEAN_AS_STRING, &iter2);
dbus_message_iter_append_basic(&iter2, DBUS_TYPE_BOOLEAN, &value);
dbus_message_iter_close_container(&iter, &iter2);
dbus_error_init(&error);
reply = dbus_connection_send_with_reply_and_block(connection, message, DBUS_TIMEOUT_USE_DEFAULT, &error);
dbus_message_unref(message);
if (reply)
{
log_debug("%s tethering %s", path, on ? "on" : "off");
dbus_message_unref(reply);
ok = TRUE;
}
else
{
if ((on && !g_strcmp0(error.name, CONNMAN_ERROR_ALREADY_ENABLED)) ||
(!on && (!g_strcmp0(error.name, CONNMAN_ERROR_ALREADY_DISABLED) ||
!g_strcmp0(error.name, DBUS_ERROR_UNKNOWN_OBJECT))))
{
ok = TRUE;
}
else
{
log_err("%s\n", error.message);
}
dbus_error_free(&error);
}
}
return ok;
}
gboolean connman_set_tethering(const char *path, gboolean on)
{
LOG_REGISTER_CONTEXT;
gboolean ok = FALSE;
DBusError error;
DBusConnection *connection;
dbus_error_init(&error);
connection = dbus_bus_get(DBUS_BUS_SYSTEM, &error);
if (connection)
{
int i;
for (i=0; i<10; i++)
{
if (i>0)
{
if( !common_msleep(200) )
break;
}
if (connman_try_set_tethering(connection, path, on))
{
ok = TRUE;
break;
}
}
dbus_connection_unref(connection);
}
else
{
log_err("%s\n", error.message);
dbus_error_free (&error);
}
return ok;
}
/**
* Connman message handling
*/
static char * connman_parse_manager_reply(DBusMessage *reply, const char *req_service)
{
LOG_REGISTER_CONTEXT;
DBusMessageIter iter, subiter, origiter;
int type;
char *service;
dbus_message_iter_init(reply, &iter);
type = dbus_message_iter_get_arg_type(&iter);
dbus_message_iter_recurse(&iter, &subiter);
type = dbus_message_iter_get_arg_type(&subiter);
origiter = subiter;
iter = subiter;
while(type != DBUS_TYPE_INVALID)
{
if(type == DBUS_TYPE_STRUCT)
{
origiter = iter;
dbus_message_iter_recurse(&iter, &subiter);
type = dbus_message_iter_get_arg_type(&subiter);
if(type == DBUS_TYPE_OBJECT_PATH)
{
dbus_message_iter_get_basic(&subiter, &service);
log_debug("service = %s\n", service);
if(strstr(service, req_service))
{
log_debug("%s service found!\n", req_service);
return strdup(service);
}
}
}
dbus_message_iter_next(&origiter);
type = dbus_message_iter_get_arg_type(&origiter);
iter = origiter;
}
log_debug("end of list\n");
return 0;
}
static int connman_fill_connection_data(DBusMessage *reply, ipforward_data_t *ipforward)
{
LOG_REGISTER_CONTEXT;
DBusMessageIter array_iter, dict_iter, inside_dict_iter, variant_iter;
DBusMessageIter sub_array_iter, string_iter;
int type, next;
char *string;
log_debug("Filling in dns data\n");
dbus_message_iter_init(reply, &array_iter);
type = dbus_message_iter_get_arg_type(&array_iter);
dbus_message_iter_recurse(&array_iter, &dict_iter);
type = dbus_message_iter_get_arg_type(&dict_iter);
while(type != DBUS_TYPE_INVALID)
{
dbus_message_iter_recurse(&dict_iter, &inside_dict_iter);
type = dbus_message_iter_get_arg_type(&inside_dict_iter);
if(type == DBUS_TYPE_STRING)
{
dbus_message_iter_get_basic(&inside_dict_iter, &string);
//log_debug("string = %s\n", string);
if(!strcmp(string, "Nameservers"))
{
//log_debug("Trying to get Nameservers");
dbus_message_iter_next (&inside_dict_iter);
type = dbus_message_iter_get_arg_type(&inside_dict_iter);
dbus_message_iter_recurse(&inside_dict_iter, &variant_iter);
type = dbus_message_iter_get_arg_type(&variant_iter);
if(type == DBUS_TYPE_ARRAY)
{
dbus_message_iter_recurse(&variant_iter, &string_iter);
type = dbus_message_iter_get_arg_type(&string_iter);
if(type != DBUS_TYPE_STRING)
{
/* not online */
return 1;
}
dbus_message_iter_get_basic(&string_iter, &string);
log_debug("dns = %s\n", string);
ipforward->dns1 = strdup(string);
next = dbus_message_iter_next (&string_iter);
if(!next)
{
log_debug("No secundary dns\n");
/* FIXME: set the same dns for dns2 to avoid breakage */
ipforward->dns2 = strdup(string);
return 0;
}
dbus_message_iter_get_basic(&string_iter, &string);
log_debug("dns2 = %s\n", string);
ipforward->dns2 = strdup(string);
return 0;
}
}
else if(!strcmp(string, "State"))
{
//log_debug("Trying to get online state");
dbus_message_iter_next (&inside_dict_iter);
type = dbus_message_iter_get_arg_type(&inside_dict_iter);
dbus_message_iter_recurse(&inside_dict_iter, &variant_iter);
type = dbus_message_iter_get_arg_type(&variant_iter);
if(type == DBUS_TYPE_STRING)
{
dbus_message_iter_get_basic(&variant_iter, &string);
log_debug("Connection state = %s\n", string);
/* if cellular not online, connect it */
if(strcmp(string, "online"))
{
/* if in ready state connection might be up anyway */
if(strcmp(string, "ready"))
log_debug("Not online. Turning on cellular data connection.\n");
return 1;
}
}
}
else if(!strcmp(string, "Ethernet"))
{
dbus_message_iter_next (&inside_dict_iter);
type = dbus_message_iter_get_arg_type(&inside_dict_iter);
dbus_message_iter_recurse(&inside_dict_iter, &variant_iter);
type = dbus_message_iter_get_arg_type(&variant_iter);
if(type == DBUS_TYPE_ARRAY)
{
dbus_message_iter_recurse(&variant_iter, &sub_array_iter);
/* we want the second dict */
dbus_message_iter_next(&sub_array_iter);
/* we go into the dict and get the string */
dbus_message_iter_recurse(&sub_array_iter, &variant_iter);
type = dbus_message_iter_get_arg_type(&variant_iter);
if(type == DBUS_TYPE_STRING)
{
dbus_message_iter_get_basic(&variant_iter, &string);
if(!strcmp(string, "Interface"))
{
/* get variant and iter down in it */
dbus_message_iter_next(&variant_iter);
dbus_message_iter_recurse(&variant_iter, &string_iter);
dbus_message_iter_get_basic(&string_iter, &string);
log_debug("cellular interface = %s\n", string);
ipforward->nat_interface = strdup(string);
}
}
}
}
}
dbus_message_iter_next (&dict_iter);
type = dbus_message_iter_get_arg_type(&dict_iter);
}
return 0;
}
/**
* Turn on cellular connection if it is not on
*/
static int connman_set_cellular_online(DBusConnection *dbus_conn_connman, const char *service, int retry)
{
LOG_REGISTER_CONTEXT;
DBusMessage *msg = NULL, *reply;
DBusError error;
int ret = 0;
char *wifi = NULL;
dbus_error_init(&error);
if(!retry)
{
if ((msg = dbus_message_new_method_call("net.connman", "/", "net.connman.Manager", "GetServices")) != NULL)
{
if ((reply = dbus_connection_send_with_reply_and_block(dbus_conn_connman, msg, -1, NULL)) != NULL)
{
wifi = connman_parse_manager_reply(reply, "wifi");
dbus_message_unref(reply);
}
dbus_message_unref(msg);
}
if(wifi != NULL)
{
/* we must make sure that wifi is disconnected as sometimes cellular will not come up otherwise */
if ((msg = dbus_message_new_method_call("net.connman", wifi, "net.connman.Service", "Disconnect")) != NULL)
{
/* we don't care for the reply, which is empty anyway if all goes well */
ret = !dbus_connection_send(dbus_conn_connman, msg, NULL);
dbus_connection_flush(dbus_conn_connman);
dbus_message_unref(msg);
}
}
}
if ((msg = dbus_message_new_method_call("net.connman", service, "net.connman.Service", "Connect")) != NULL)
{
/* we don't care for the reply, which is empty anyway if all goes well */
ret = !dbus_connection_send(dbus_conn_connman, msg, NULL);
/* sleep for the connection to come up */
common_sleep(5);
/* make sure the message is sent before cleaning up and closing the connection */
dbus_connection_flush(dbus_conn_connman);
dbus_message_unref(msg);
}
if(wifi)
free(wifi);
return ret;
}
/*
* Turn on or off the wifi service
* wifistatus static variable tracks the state so we do not turn on the wifi if it was off
*
*/
static int connman_wifi_power_control(DBusConnection *dbus_conn_connman, int on)
{
LOG_REGISTER_CONTEXT;
static int wifistatus = 0;
int type = 0;
char *string;
DBusMessage *msg = NULL, *reply;
//DBusError error;
DBusMessageIter array_iter, dict_iter, inside_dict_iter, variant_iter;
if(!on)
{
/* check wifi status only before turning off */
if ((msg = dbus_message_new_method_call("net.connman", "/net/connman/technology/wifi", "net.connman.Technology", "GetProperties")) != NULL)
{
if ((reply = dbus_connection_send_with_reply_and_block(dbus_conn_connman, msg, -1, NULL)) != NULL)
{
dbus_message_iter_init(reply, &array_iter);
dbus_message_iter_recurse(&array_iter, &dict_iter);
type = dbus_message_iter_get_arg_type(&dict_iter);
while(type != DBUS_TYPE_INVALID)
{
dbus_message_iter_recurse(&dict_iter, &inside_dict_iter);
type = dbus_message_iter_get_arg_type(&inside_dict_iter);
if(type == DBUS_TYPE_STRING)
{
dbus_message_iter_get_basic(&inside_dict_iter, &string);
log_debug("string = %s\n", string);
if(!strcmp(string, "Powered"))
{
dbus_message_iter_next (&inside_dict_iter);
type = dbus_message_iter_get_arg_type(&inside_dict_iter);
dbus_message_iter_recurse(&inside_dict_iter, &variant_iter);
type = dbus_message_iter_get_arg_type(&variant_iter);
if(type == DBUS_TYPE_BOOLEAN)
{
dbus_message_iter_get_basic(&variant_iter, &wifistatus);
log_debug("Powered state = %d\n", wifistatus);
}
break;
}
}
dbus_message_iter_next (&dict_iter);
type = dbus_message_iter_get_arg_type(&dict_iter);
}
dbus_message_unref(reply);
}
dbus_message_unref(msg);
}
}
/* /net/connman/technology/wifi net.connman.Technology.SetProperty string:Powered variant:boolean:false */
if(wifistatus && !on)
common_system("/bin/dbus-send --print-reply --type=method_call --system --dest=net.connman /net/connman/technology/wifi net.connman.Technology.SetProperty string:Powered variant:boolean:false");
if(wifistatus && on)
/* turn on wifi after tethering is over and wifi was on before */
common_system("/bin/dbus-send --print-reply --type=method_call --system --dest=net.connman /net/connman/technology/wifi net.connman.Technology.SetProperty string:Powered variant:boolean:true");
return 0;
}
static int connman_get_connection_data(ipforward_data_t *ipforward)
{
LOG_REGISTER_CONTEXT;
DBusConnection *dbus_conn_connman = NULL;
DBusMessage *msg = NULL, *reply = NULL;
DBusError error;
char *service = NULL;
int online = 0, ret = 0;
dbus_error_init(&error);
if( (dbus_conn_connman = dbus_bus_get(DBUS_BUS_SYSTEM, &error)) == 0 )
{
log_err("Could not connect to dbus for connman\n");
}
/* turn off wifi in preparation for cellular connection if needed */
connman_wifi_power_control(dbus_conn_connman, 0);
/* get list of services so we can find out which one is the cellular */
if ((msg = dbus_message_new_method_call("net.connman", "/", "net.connman.Manager", "GetServices")) != NULL)
{
if ((reply = dbus_connection_send_with_reply_and_block(dbus_conn_connman, msg, -1, NULL)) != NULL)
{
service = connman_parse_manager_reply(reply, "cellular");
dbus_message_unref(reply);
}
dbus_message_unref(msg);
}
log_debug("service = %s\n", service);
if(service)
{
try_again:
if ((msg = dbus_message_new_method_call("net.connman", service, "net.connman.Service", "GetProperties")) != NULL)
{
if ((reply = dbus_connection_send_with_reply_and_block(dbus_conn_connman, msg, -1, NULL)) != NULL)
{
if(connman_fill_connection_data(reply, ipforward))
{
if(!connman_set_cellular_online(dbus_conn_connman, service, online) && !online)
{
online = 1;
goto try_again;
}
else
{
log_debug("Cannot connect to cellular data\n");
ret = 1;
}
}
dbus_message_unref(reply);
}
dbus_message_unref(msg);
}
}
dbus_connection_unref(dbus_conn_connman);
dbus_error_free(&error);
free(service);
return ret;
}
static int connman_reset_state(void)
{
LOG_REGISTER_CONTEXT;
DBusConnection *dbus_conn_connman = NULL;
DBusError error;
dbus_error_init(&error);
if( (dbus_conn_connman = dbus_bus_get(DBUS_BUS_SYSTEM, &error)) == 0 )
{
log_err("Could not connect to dbus for connman\n");
}
/* make sure connman turns wifi back on when we disconnect */
log_debug("Turning wifi back on\n");
connman_wifi_power_control(dbus_conn_connman, 1);
dbus_connection_unref(dbus_conn_connman);
dbus_error_free(&error);
return 0;
}
#endif /* CONNMAN */
/**
* Write out /etc/udhcpd.conf conf so the config is available when it gets started
*/
int network_set_up_dhcpd(modedata_t *data)
{
LOG_REGISTER_CONTEXT;
ipforward_data_t *ipforward = NULL;
int ret = 1;
/* Set up nat info only if it is required */
if(data->nat)
{
#ifdef OFONO
/* check if we are roaming or not */
if(get_roaming())
{
/* get permission to use roaming */
if(config_is_roaming_not_allowed())
goto end;
}
#endif /* OFONO */
ipforward = calloc(1, sizeof *ipforward);
#ifdef CONNMAN
if(connman_get_connection_data(ipforward))
{
log_debug("data connection not available!\n");
/* TODO: send a message to the UI */
goto end;
}
#else
if(resolv_conf_dns(ipforward))
goto end;
#endif /*CONNMAN */
}
/* ipforward can be NULL here, which is expected and handled in this function */
ret = network_write_udhcpd_conf(ipforward, data);