summaryrefslogtreecommitdiffstats
path: root/gprs.c
blob: d5306283d6da0e9bb457bcb686f2d3d8429349e4 (plain)
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
/**
 * This file is part of samsung-ril.
 *
 * Copyright (C) 2011-2012 Paul Kocialkowski <contact@oaulk.fr>
 * Copyright (C) 2011 Denis 'GNUtoo' Carikli <GNUtoo@no-log.org>
 *
 * samsung-ril is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * samsung-ril 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 GNU General Public License
 * along with samsung-ril.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include <netinet/in.h>
#include <arpa/inet.h>

#define LOG_TAG "RIL-GPRS"
#include <utils/Log.h>
#include <cutils/properties.h>

#if RIL_VERSION >= 6
#include <netutils/ifc.h>
#endif

#include "samsung-ril.h"
#include "util.h"

struct ril_gprs_connection **ril_gprs_connections;
int ril_gprs_connections_count;

RIL_LastDataCallActivateFailCause ipc2ril_gprs_fail_cause(unsigned short fail_cause)
{
	switch(fail_cause) {

		case IPC_GPRS_FAIL_INSUFFICIENT_RESOURCES:
			return PDP_FAIL_INSUFFICIENT_RESOURCES;
		case IPC_GPRS_FAIL_MISSING_UKNOWN_APN:
			return PDP_FAIL_MISSING_UKNOWN_APN;
		case IPC_GPRS_FAIL_UNKNOWN_PDP_ADDRESS_TYPE:
			return PDP_FAIL_UNKNOWN_PDP_ADDRESS_TYPE;
		case IPC_GPRS_FAIL_USER_AUTHENTICATION:
			return PDP_FAIL_USER_AUTHENTICATION;
		case IPC_GPRS_FAIL_ACTIVATION_REJECT_GGSN:
			return PDP_FAIL_ACTIVATION_REJECT_GGSN;
		case IPC_GPRS_FAIL_ACTIVATION_REJECT_UNSPECIFIED:
			return PDP_FAIL_ACTIVATION_REJECT_UNSPECIFIED;
		case IPC_GPRS_FAIL_SERVICE_OPTION_NOT_SUPPORTED:
			return PDP_FAIL_SERVICE_OPTION_NOT_SUPPORTED;
		case IPC_GPRS_FAIL_SERVICE_OPTION_NOT_SUBSCRIBED:
			return PDP_FAIL_SERVICE_OPTION_NOT_SUBSCRIBED;
		case IPC_GPRS_FAIL_SERVICE_OPTION_OUT_OF_ORDER:
			return PDP_FAIL_SERVICE_OPTION_OUT_OF_ORDER;
		case IPC_GPRS_FAIL_NSAPI_IN_USE:
			return PDP_FAIL_NSAPI_IN_USE;
		default:
			return PDP_FAIL_ERROR_UNSPECIFIED;
	}
}

int ipc2ril_gprs_connection_active(unsigned char state)
{
	switch(state) {
		case IPC_GPRS_STATE_DISABLED:
			return 1;
		case IPC_GPRS_STATE_ENABLED:
			return 2;
		case IPC_GPRS_STATE_NOT_ENABLED:
		default:
			return 0;
	}
}

void ril_gprs_connections_init(void)
{
	struct ipc_client_gprs_capabilities gprs_capabilities;
	struct ipc_client *ipc_client;
	int ril_gprs_connections_size = 0;

	ipc_client = ((struct ipc_client_object *) ipc_fmt_client->object)->ipc_client;
	ipc_client_gprs_get_capabilities(ipc_client, &gprs_capabilities);

	ril_gprs_connections_size =
		gprs_capabilities.cid_max * sizeof(struct ril_gprs_connection *);

	ril_gprs_connections = (struct ril_gprs_connection **)
		malloc(ril_gprs_connections_size);
	memset((void *) ril_gprs_connections, 0, ril_gprs_connections_size);

	ril_gprs_connections_count = gprs_capabilities.cid_max;
}

int ril_gprs_connection_reg_id(void)
{
	struct ril_gprs_connection *gprs_connection;
	int i;

	for(i=0 ; i < ril_gprs_connections_count ; i++) {
		if(ril_gprs_connections[i] == NULL)
			return i;
	}

	LOGD("No room left for another GPRS connection, trying to clean one up");

	// When all the slots are taken, see if some are in a non-working state
	for(i=0 ; i < ril_gprs_connections_count ; i++) {
		if(ril_gprs_connections[i]->enabled == 0) {
			ril_gprs_connection_del(ril_gprs_connections[i]);

			return i;
		}
	}

	return -1;
}

struct ril_gprs_connection *ril_gprs_connection_add(void)
{
	struct ril_gprs_connection *gprs_connection = NULL;
	int id = ril_gprs_connection_reg_id();

	if(id < 0) {
		LOGE("Unable to add another GPRS connection!");
		return NULL;
	}

	gprs_connection = malloc(sizeof(struct ril_gprs_connection));
	memset(gprs_connection, 0, sizeof(struct ril_gprs_connection));

	gprs_connection->cid = id + 1;
	gprs_connection->enabled = 0;
	gprs_connection->interface = NULL;
	gprs_connection->token = (RIL_Token) 0x00;

	ril_gprs_connections[id] = gprs_connection;

	return gprs_connection;
}

void ril_gprs_connection_del(struct ril_gprs_connection *gprs_connection)
{
	int i;

	if(gprs_connection == NULL)
		return;

	if(gprs_connection->interface != NULL)
		free(gprs_connection->interface);

	for(i=0 ; i < ril_gprs_connections_count ; i++)
		if(ril_gprs_connections[i] == gprs_connection)
				ril_gprs_connections[i] = NULL;

	free(gprs_connection);
}

struct ril_gprs_connection *ril_gprs_connection_get_token(RIL_Token token)
{
	int i;

	for(i=0 ; i < ril_gprs_connections_count ; i++)
		if(ril_gprs_connections[i] != NULL)
			if(ril_gprs_connections[i]->token == token)
				return ril_gprs_connections[i];

	return NULL;
}

struct ril_gprs_connection *ril_gprs_connection_get_cid(int cid)
{
	int i;

	for(i=0 ; i < ril_gprs_connections_count ; i++)
		if(ril_gprs_connections[i] != NULL)
			if(ril_gprs_connections[i]->cid == cid)
				return ril_gprs_connections[i];

	return NULL;
}

void ipc_gprs_pdp_context_enable_complete(struct ipc_message_info *info)
{
	struct ipc_gen_phone_res *phone_res = (struct ipc_gen_phone_res *) info->data;
	struct ril_gprs_connection *gprs_connection;
	int rc;

	gprs_connection = ril_gprs_connection_get_token(reqGetToken(info->aseq));

	if(!gprs_connection) {
		LOGE("Unable to find GPRS connection, aborting");

		RIL_onRequestComplete(reqGetToken(info->aseq),
			RIL_E_GENERIC_FAILURE, NULL, 0);
		return;
	}

	rc = ipc_gen_phone_res_check(phone_res);
	if(rc < 0) {
		LOGE("There was an error, aborting PDP context complete");

		gprs_connection->fail_cause = PDP_FAIL_ERROR_UNSPECIFIED;
		gprs_connection->token = (RIL_Token) 0x00;
		ril_state.gprs_last_failed_cid = gprs_connection->cid;

		RIL_onRequestComplete(reqGetToken(info->aseq),
			RIL_E_GENERIC_FAILURE, NULL, 0);
		return;
	}

	LOGD("Waiting for IP configuration!");
}

void ipc_gprs_define_pdp_context_complete(struct ipc_message_info *info)
{
	struct ipc_gen_phone_res *phone_res = (struct ipc_gen_phone_res *) info->data;
	struct ril_gprs_connection *gprs_connection;
	int aseq;
	int rc;

	gprs_connection = ril_gprs_connection_get_token(reqGetToken(info->aseq));

	if(!gprs_connection) {
		LOGE("Unable to find GPRS connection, aborting");

		RIL_onRequestComplete(reqGetToken(info->aseq),
			RIL_E_GENERIC_FAILURE, NULL, 0);
		return;
	}

	rc = ipc_gen_phone_res_check(phone_res);
	if(rc < 0) {
		LOGE("There was an error, aborting define PDP context complete");

		gprs_connection->fail_cause = PDP_FAIL_ERROR_UNSPECIFIED;
		gprs_connection->token = (RIL_Token) 0x00;
		ril_state.gprs_last_failed_cid = gprs_connection->cid;

		RIL_onRequestComplete(reqGetToken(info->aseq),
			RIL_E_GENERIC_FAILURE, NULL, 0);
		return;
	}

	// We need to get a clean new aseq here
	aseq = ril_request_reg_id(reqGetToken(info->aseq));

	ipc_gen_phone_res_expect_to_func(aseq, IPC_GPRS_PDP_CONTEXT,
		ipc_gprs_pdp_context_enable_complete);

	ipc_fmt_send(IPC_GPRS_PDP_CONTEXT, IPC_TYPE_SET,
			(void *) &(gprs_connection->context),
			sizeof(struct ipc_gprs_pdp_context_set), aseq);
}

void ipc_gprs_port_list_complete(struct ipc_message_info *info)
{
	struct ipc_gen_phone_res *phone_res = (struct ipc_gen_phone_res *) info->data;
	struct ril_gprs_connection *gprs_connection;
	int rc;
	int aseq;

	gprs_connection = ril_gprs_connection_get_token(reqGetToken(info->aseq));

	if(!gprs_connection) {
		LOGE("Unable to find GPRS connection, aborting");

		RIL_onRequestComplete(reqGetToken(info->aseq),
			RIL_E_GENERIC_FAILURE, NULL, 0);
		return;
	}

	rc = ipc_gen_phone_res_check(phone_res);
	if(rc < 0) {
		LOGE("There was an error, aborting port list complete");

		gprs_connection->fail_cause = PDP_FAIL_ERROR_UNSPECIFIED;
		gprs_connection->token = (RIL_Token) 0x00;
		ril_state.gprs_last_failed_cid = gprs_connection->cid;

		RIL_onRequestComplete(reqGetToken(info->aseq),
			RIL_E_GENERIC_FAILURE, NULL, 0);
		return;
	}

	// We need to get a clean new aseq here
	aseq = ril_request_reg_id(reqGetToken(info->aseq));

	ipc_gen_phone_res_expect_to_func(aseq, IPC_GPRS_DEFINE_PDP_CONTEXT,
		ipc_gprs_define_pdp_context_complete);

	ipc_fmt_send(IPC_GPRS_DEFINE_PDP_CONTEXT, IPC_TYPE_SET,
		(void *) &(gprs_connection->define_context),
		sizeof(struct ipc_gprs_define_pdp_context),
		aseq);
}

void ril_request_setup_data_call(RIL_Token t, void *data, int length)
{
	struct ril_gprs_connection *gprs_connection = NULL;
	struct ipc_client_gprs_capabilities gprs_capabilities;
	struct ipc_gprs_port_list port_list;
	struct ipc_client *ipc_client;

	char *username = NULL;
	char *password = NULL;
	char *apn = NULL;

	ipc_client = ((struct ipc_client_object *) ipc_fmt_client->object)->ipc_client;

	apn = ((char **) data)[2];
	username = ((char **) data)[3];
	password = ((char **) data)[4];

	LOGD("Requesting data connection to APN '%s'\n", apn);

	gprs_connection = ril_gprs_connection_add();

	if(!gprs_connection) {
		LOGE("Unable to create GPRS connection, aborting");

		RIL_onRequestComplete(t, RIL_E_GENERIC_FAILURE, NULL, 0);
		return;
	}

	gprs_connection->token = t;

	// Create the structs with the apn
	ipc_gprs_define_pdp_context_setup(&(gprs_connection->define_context),
		gprs_connection->cid, 1, apn);

	// Create the structs with the username/password tuple
	ipc_gprs_pdp_context_setup(&(gprs_connection->context),
		gprs_connection->cid, 1, username, password);

	ipc_client_gprs_get_capabilities(ipc_client, &gprs_capabilities);

	// If the device has the capability, deal with port list
	if(gprs_capabilities.port_list) {
		ipc_gprs_port_list_setup(&port_list);

		ipc_gen_phone_res_expect_to_func(reqGetId(t), IPC_GPRS_PORT_LIST,
			ipc_gprs_port_list_complete);

		ipc_fmt_send(IPC_GPRS_PORT_LIST, IPC_TYPE_SET,
			(void *) &port_list, sizeof(struct ipc_gprs_port_list), reqGetId(t));
	} else {
		ipc_gen_phone_res_expect_to_func(reqGetId(t), IPC_GPRS_DEFINE_PDP_CONTEXT,
			ipc_gprs_define_pdp_context_complete);

		ipc_fmt_send(IPC_GPRS_DEFINE_PDP_CONTEXT, IPC_TYPE_SET,
			(void *) &(gprs_connection->define_context),
				sizeof(struct ipc_gprs_define_pdp_context), reqGetId(t));
	}
}

void ipc_gprs_ip_configuration(struct ipc_message_info *info)
{
	struct ril_gprs_connection *gprs_connection;
        struct ipc_gprs_ip_configuration *ip_configuration =
		(struct ipc_gprs_ip_configuration *) info->data;

	gprs_connection = ril_gprs_connection_get_cid(ip_configuration->cid);

	if(!gprs_connection) {
		LOGE("Unable to find GPRS connection, aborting");

		RIL_onRequestComplete(reqGetToken(info->aseq),
			RIL_E_GENERIC_FAILURE, NULL, 0);
		return;
	}

	LOGD("Obtained IP Configuration");

	// Copy the obtained IP configuration to the GPRS connection structure
	memcpy(&(gprs_connection->ip_configuration),
		ip_configuration, sizeof(struct ipc_gprs_ip_configuration));

	LOGD("Waiting for GPRS call status");
}

void ipc_gprs_pdp_context_disable_complete(struct ipc_message_info *info)
{
	struct ipc_gen_phone_res *phone_res = (struct ipc_gen_phone_res *) info->data;
	struct ril_gprs_connection *gprs_connection;
	int rc;

	gprs_connection = ril_gprs_connection_get_token(reqGetToken(info->aseq));

	if(!gprs_connection) {
		LOGE("Unable to find GPRS connection, aborting");

		RIL_onRequestComplete(reqGetToken(info->aseq),
			RIL_E_GENERIC_FAILURE, NULL, 0);
		return;
	}

	rc = ipc_gen_phone_res_check(phone_res);
	if(rc < 0) {
		LOGE("There was an error, aborting PDP context complete");

		// RILJ is not going to ask for fail reason
		ril_gprs_connection_del(gprs_connection);

		RIL_onRequestComplete(reqGetToken(info->aseq),
			RIL_E_GENERIC_FAILURE, NULL, 0);
		return;
	}

	LOGD("Waiting for GPRS call status");
}

void ril_request_deactivate_data_call(RIL_Token t, void *data, int length)
{
	struct ril_gprs_connection *gprs_connection;
	struct ipc_gprs_pdp_context_set context;

	char *cid = ((char **) data)[0];
	int rc;

	gprs_connection = ril_gprs_connection_get_cid(atoi(cid));

	if(!gprs_connection) {
		LOGE("Unable to find GPRS connection, aborting");

		RIL_onRequestComplete(t, RIL_E_GENERIC_FAILURE, NULL, 0);
		return;
	}

	gprs_connection->token = t;

	ipc_gprs_pdp_context_setup(&context, gprs_connection->cid, 0, NULL, NULL);

	ipc_gen_phone_res_expect_to_func(reqGetId(t), IPC_GPRS_PDP_CONTEXT,
		ipc_gprs_pdp_context_disable_complete);

	ipc_fmt_send(IPC_GPRS_PDP_CONTEXT, IPC_TYPE_SET,
		(void *) &context, sizeof(struct ipc_gprs_pdp_context_set), reqGetId(t));
}

int ipc_gprs_connection_enable(struct ril_gprs_connection *gprs_connection,
	RIL_Data_Call_Response *setup_data_call_response)
{
	struct ipc_client *ipc_client;
        struct ipc_gprs_ip_configuration *ip_configuration;

	char *interface = NULL;
	char *ip;
	char *gateway;
	char *subnet_mask;
	char *dns1;
	char *dns2;

	char prop_name[PROPERTY_KEY_MAX];

	int rc;

	ipc_client = ((struct ipc_client_object *) ipc_fmt_client->object)->ipc_client;

	ip_configuration = &(gprs_connection->ip_configuration);

	asprintf(&ip, "%i.%i.%i.%i",
		(ip_configuration->ip)[0],
		(ip_configuration->ip)[1],
		(ip_configuration->ip)[2],
		(ip_configuration->ip)[3]);

	// FIXME: gateway isn't reliable!
	asprintf(&gateway, "%i.%i.%i.%i",
		(ip_configuration->ip)[0],
		(ip_configuration->ip)[1],
		(ip_configuration->ip)[2],
		(ip_configuration->ip)[3]);
	// FIXME: subnet isn't reliable!
    asprintf(&subnet_mask, "255.255.255.255");
    
	asprintf(&dns1, "%i.%i.%i.%i",
		(ip_configuration->dns1)[0],
		(ip_configuration->dns1)[1],
		(ip_configuration->dns1)[2],
		(ip_configuration->dns1)[3]);
    asprintf(&dns2, "%i.%i.%i.%i",
		(ip_configuration->dns2)[0],
		(ip_configuration->dns2)[1],
		(ip_configuration->dns2)[2],
		(ip_configuration->dns2)[3]);	

	if(ipc_client_gprs_handlers_available(ipc_client)) {
		rc = ipc_client_gprs_activate(ipc_client);
		if(rc < 0) {
			// This is not a critical issue
			LOGE("Failed to activate interface!");
		}
	}

	rc = ipc_client_gprs_get_iface(ipc_client, &interface, gprs_connection->cid);
	if(rc < 0) {
		// This is not a critical issue, fallback to rmnet
		LOGE("Failed to get interface name!");
		asprintf(&interface, "rmnet%d", gprs_connection->cid - 1);
	}

	if(gprs_connection->interface == NULL && interface != NULL) {
		gprs_connection->interface = strdup(interface);
	}

	LOGD("Using net interface: %s\n", interface);

        LOGD("GPRS configuration: iface: %s, ip:%s, "
			"gateway:%s, subnet_mask:%s, dns1:%s, dns2:%s",
		interface, ip, gateway, subnet_mask, dns1, dns2);

	int subnet_addr = inet_addr(subnet_mask);
	#if RIL_VERSION >= 6
		subnet_addr = ipv4NetmaskToPrefixLength(subnet_addr);
	#endif

	rc = ifc_configure(interface, inet_addr(ip),
		subnet_addr,
		inet_addr(gateway),
		inet_addr(dns1), inet_addr(dns2));

	if(rc < 0) {
		LOGE("ifc_configure failed");

		free(interface);
		return -1;
	}

	snprintf(prop_name, PROPERTY_KEY_MAX, "net.%s.dns1", interface);
	property_set(prop_name, dns1);
	snprintf(prop_name, PROPERTY_KEY_MAX, "net.%s.dns2", interface);
	property_set(prop_name, dns2);
	snprintf(prop_name, PROPERTY_KEY_MAX, "net.%s.gw", interface);
	property_set(prop_name, gateway);

	setup_data_call_response->cid = gprs_connection->cid;
	setup_data_call_response->active = 1;
	setup_data_call_response->type = strdup("IP");

#if RIL_VERSION >= 6
	setup_data_call_response->status = 0;
	setup_data_call_response->ifname = interface;
	setup_data_call_response->addresses = ip;
	setup_data_call_response->gateways = gateway;
	asprintf(&setup_data_call_response->dnses, "%s %s", dns1, dns2);
#else
	setup_data_call_response->address = ip;
	free(gateway);
#endif
	
	free(subnet_mask);
	free(dns1);
	free(dns2);

	return 0;
}

int ipc_gprs_connection_disable(struct ril_gprs_connection *gprs_connection)
{
	struct ipc_client *ipc_client;

	char *interface;
	int rc;

	ipc_client = ((struct ipc_client_object *) ipc_fmt_client->object)->ipc_client;

	if(gprs_connection->interface == NULL) {
		rc = ipc_client_gprs_get_iface(ipc_client, &interface, gprs_connection->cid);
		if(rc < 0) {
			// This is not a critical issue, fallback to rmnet
			LOGE("Failed to get interface name!");
			asprintf(&interface, "rmnet%d", gprs_connection->cid);
		}
	} else {
		interface = gprs_connection->interface;
	}

	LOGD("Using net interface: %s\n", interface);

	rc = ifc_down(interface);

	if(gprs_connection->interface == NULL)
		free(interface);

	if(rc < 0) {
		LOGE("ifc_down failed");
	}

	if(ipc_client_gprs_handlers_available(ipc_client)) {
		rc = ipc_client_gprs_deactivate(ipc_client);
		if(rc < 0) {
			// This is not a critical issue
			LOGE("Failed to deactivate interface!");
		}
	}

	return 0;
}

static void cleanup_ril_data_call_response(RIL_Data_Call_Response *response) {
	if (!response) {
		return;
	}
	free(response->type);
#if RIL_VERSION < 6
	free(response->apn);
	free(response->address);
#else
	free(response->addresses);
	free(response->ifname);
	free(response->dnses);
	free(response->gateways);
#endif
}

void ipc_gprs_call_status(struct ipc_message_info *info)
{
	struct ril_gprs_connection *gprs_connection;
	struct ipc_gprs_call_status *call_status =
		(struct ipc_gprs_call_status *) info->data;

	RIL_Data_Call_Response setup_data_call_response;
	memset(&setup_data_call_response, 0, sizeof(setup_data_call_response));
	int rc;

	gprs_connection = ril_gprs_connection_get_cid(call_status->cid);

	if(!gprs_connection) {
		LOGE("Unable to find GPRS connection, aborting");

		RIL_onRequestComplete(reqGetToken(info->aseq),
			RIL_E_GENERIC_FAILURE, NULL, 0);
		return;
	}

	if(call_status->fail_cause == 0) {
		if(!gprs_connection->enabled &&
			call_status->state == IPC_GPRS_STATE_ENABLED &&
			gprs_connection->token != (RIL_Token) 0x00) {
			LOGD("GPRS connection is now enabled");

			rc = ipc_gprs_connection_enable(gprs_connection,
				&setup_data_call_response);
			if(rc < 0) {
				LOGE("Failed to enable and configure GPRS interface");

				gprs_connection->enabled = 0;
				gprs_connection->fail_cause = PDP_FAIL_ERROR_UNSPECIFIED;
				ril_state.gprs_last_failed_cid = gprs_connection->cid;

				RIL_onRequestComplete(gprs_connection->token,
					RIL_E_GENERIC_FAILURE, NULL, 0);
			} else {
				LOGD("GPRS interface enabled");

				gprs_connection->enabled = 1;

				RIL_onRequestComplete(gprs_connection->token,
					RIL_E_SUCCESS, &setup_data_call_response,
					sizeof(setup_data_call_response));
				gprs_connection->token = (RIL_Token) 0x00;
			}
			cleanup_ril_data_call_response(&setup_data_call_response);
		} else if(gprs_connection->enabled &&
			call_status->state == IPC_GPRS_STATE_DISABLED &&
			gprs_connection->token != (RIL_Token) 0x00) {
			LOGD("GPRS connection is now disabled");

			rc = ipc_gprs_connection_disable(gprs_connection);
			if(rc < 0) {
				LOGE("Failed to disable GPRS interface");

				RIL_onRequestComplete(gprs_connection->token,
					RIL_E_GENERIC_FAILURE, NULL, 0);

				// RILJ is not going to ask for fail reason
				ril_gprs_connection_del(gprs_connection);
			} else {
				LOGD("GPRS interface disabled");

				gprs_connection->enabled = 0;

				RIL_onRequestComplete(gprs_connection->token,
					RIL_E_SUCCESS, NULL, 0);

				ril_gprs_connection_del(gprs_connection);
			}
		} else {
			LOGE("GPRS connection reported as changed though state is not OK:"
			"\n\tgprs_connection->enabled=%d\n\tgprs_connection->token=0x%x",
				gprs_connection->enabled, (unsigned)gprs_connection->token);

			ril_unsol_data_call_list_changed();
		}
	} else {
		if(!gprs_connection->enabled &&
			(call_status->state == IPC_GPRS_STATE_NOT_ENABLED ||
			call_status->state == IPC_GPRS_STATE_DISABLED) &&
			gprs_connection->token != (RIL_Token) 0x00) {
			LOGE("Failed to enable GPRS connection");

			gprs_connection->enabled = 0;
			gprs_connection->fail_cause =
				ipc2ril_gprs_fail_cause(call_status->fail_cause);
			ril_state.gprs_last_failed_cid = gprs_connection->cid;

			RIL_onRequestComplete(gprs_connection->token,
				RIL_E_GENERIC_FAILURE, NULL, 0);
			gprs_connection->token = (RIL_Token) 0x00;

			ril_unsol_data_call_list_changed();
		} else if(gprs_connection->enabled &&
			call_status->state == IPC_GPRS_STATE_DISABLED) {
			LOGE("GPRS connection suddently got disabled");

			rc = ipc_gprs_connection_disable(gprs_connection);
			if(rc < 0) {
				LOGE("Failed to disable GPRS interface");

				// RILJ is not going to ask for fail reason
				ril_gprs_connection_del(gprs_connection);
			} else {
				LOGE("GPRS interface disabled");

				gprs_connection->enabled = 0;
				ril_gprs_connection_del(gprs_connection);
			}

			ril_unsol_data_call_list_changed();
		} else {
			LOGE("GPRS connection reported to have failed though state is OK:"
			"\n\tgprs_connection->enabled=%d\n\tgprs_connection->token=0x%x",
				gprs_connection->enabled, (unsigned)gprs_connection->token);

			ril_unsol_data_call_list_changed();
		}
	}
}

void ril_request_last_data_call_fail_cause(RIL_Token t)
{
	struct ril_gprs_connection *gprs_connection;
	int last_failed_cid;
	int fail_cause;

	last_failed_cid = ril_state.gprs_last_failed_cid;

	if(!last_failed_cid) {
		LOGE("No GPRS connection was reported to have failed");

		goto fail_cause_unspecified;
	}

	gprs_connection = ril_gprs_connection_get_cid(last_failed_cid);

	if(!gprs_connection) {
		LOGE("Unable to find GPRS connection");

		goto fail_cause_unspecified;
	}

	fail_cause = gprs_connection->fail_cause;

	LOGD("Destroying GPRS connection with cid: %d", gprs_connection->cid);
	ril_gprs_connection_del(gprs_connection);

	goto fail_cause_return;

fail_cause_unspecified:
	fail_cause = PDP_FAIL_ERROR_UNSPECIFIED;

fail_cause_return:
	ril_state.gprs_last_failed_cid = 0;
	RIL_onRequestComplete(t, RIL_E_SUCCESS, &fail_cause, sizeof(fail_cause));
}

/*
 * Some modem firmwares have a bug that will make the first cid (1) overriden
 * by the current cid, thus reporting it twice, with a wrong 2nd status.
 *
 * This shouldn't change anything to healthy structures.
 */
void ipc_gprs_pdp_context_fix(RIL_Data_Call_Response *data_call_list, int c)
{
	int i, j, k;

	for(i=0 ; i < c ; i++) {
		for(j=i-1 ; j >= 0 ; j--) {
			if(data_call_list[i].cid == data_call_list[j].cid) {
				for(k=0 ; k < c ; k++) {
					if(data_call_list[k].cid == 1) {
						data_call_list[i].cid = 0;
						break;
					}
				}

				data_call_list[i].cid = 1;
			}
		}
	}
}

void ipc_gprs_pdp_context(struct ipc_message_info *info)
{
	struct ril_gprs_connection *gprs_connection;
        struct ipc_gprs_ip_configuration *ip_configuration;
	struct ipc_gprs_pdp_context_get *context =
		(struct ipc_gprs_pdp_context_get *) info->data;

	RIL_Data_Call_Response data_call_list[IPC_GPRS_PDP_CONTEXT_GET_DESC_COUNT];
	memset(data_call_list, 0, sizeof(data_call_list));

	int i;

	for(i=0 ; i < IPC_GPRS_PDP_CONTEXT_GET_DESC_COUNT ; i++) {
		data_call_list[i].cid = context->desc[i].cid;
		data_call_list[i].active =
			ipc2ril_gprs_connection_active(context->desc[i].state);

		if(context->desc[i].state == IPC_GPRS_STATE_ENABLED) {
			gprs_connection = ril_gprs_connection_get_cid(context->desc[i].cid);

			if(gprs_connection == NULL) {
				LOGE("CID %d reported as enabled but not listed here",
					context->desc[i].cid);
				continue;
			}

			ip_configuration = &(gprs_connection->ip_configuration);

			char *addr = NULL;
			asprintf(&addr, "%i.%i.%i.%i",
				(ip_configuration->ip)[0],
				(ip_configuration->ip)[1],
				(ip_configuration->ip)[2],
				(ip_configuration->ip)[3]);

			RIL_Data_Call_Response *resp = &data_call_list[i];
			resp->type = strdup("IP");

			#if RIL_VERSION < 6
			resp->address = addr;
			asprintf(&(resp->apn), "%s",
				gprs_connection->define_context.apn);
			#else
			resp->addresses = addr;
			resp->gateways = strdup(addr);
			resp->ifname = strdup(gprs_connection->interface);
			asprintf(&resp->dnses, "%i.%i.%i.%i %i.%i.%i.%i",
				ip_configuration->dns1[0],
				ip_configuration->dns1[1],
				ip_configuration->dns1[2],
				ip_configuration->dns1[3],

				ip_configuration->dns2[0],
				ip_configuration->dns2[1],
				ip_configuration->dns2[2],
				ip_configuration->dns2[3]);
			#endif
		}
	}

	ipc_gprs_pdp_context_fix(data_call_list, IPC_GPRS_PDP_CONTEXT_GET_DESC_COUNT);

	if(info->aseq == 0xff)
		RIL_onUnsolicitedResponse(RIL_UNSOL_DATA_CALL_LIST_CHANGED,
			&data_call_list, sizeof(data_call_list));
	else
		RIL_onRequestComplete(reqGetToken(info->aseq), RIL_E_SUCCESS,
			&data_call_list, sizeof(data_call_list));

	for(i = 0; i < IPC_GPRS_PDP_CONTEXT_GET_DESC_COUNT; i++) {
		cleanup_ril_data_call_response(data_call_list + i);
	}
}

void ril_unsol_data_call_list_changed(void)
{
	ipc_fmt_send_get(IPC_GPRS_PDP_CONTEXT, 0xff);
}

void ril_request_data_call_list(RIL_Token t)
{
	ipc_fmt_send_get(IPC_GPRS_PDP_CONTEXT, reqGetId(t));
}