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
/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (the "License"); you may not use this file
* except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.openairinterface.org/?page_id=698
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
/*! \file flexran_agent_handler.c
* \brief FlexRAN agent tx and rx message handler
* \author Xenofon Foukas and Navid Nikaein and shahab SHARIAT BAGHERI
* \date 2017
* \version 0.1
*/
#include "flexran_agent_defs.h"
#include "flexran_agent_common.h"
#include "flexran_agent_mac.h"
#include "flexran_agent_rrc.h"
#include "flexran_agent_pdcp.h"
#include "flexran_agent_timer.h"
#include "flexran_agent_ran_api.h"
#include "common/utils/LOG/log.h"
#include "assertions.h"
flexran_agent_message_decoded_callback agent_messages_callback[][3] = {
{flexran_agent_hello, 0, 0}, /*PROTOCOL__FLEXRAN_MESSAGE__MSG_HELLO_MSG*/
{flexran_agent_echo_reply, 0, 0}, /*PROTOCOL__FLEXRAN_MESSAGE__MSG_ECHO_REQUEST_MSG*/
{0, 0, 0}, /*PROTOCOL__FLEXRAN_MESSAGE__MSG_ECHO_REPLY_MSG*/ //Must add handler when receiving echo reply
{flexran_agent_handle_stats, 0, 0}, /*PROTOCOL__FLEXRAN_MESSAGE__MSG_STATS_REQUEST_MSG*/
{0, 0, 0}, /*PROTOCOL__FLEXRAN_MESSAGE__MSG_STATS_REPLY_MSG*/
{0, 0, 0}, /*PROTOCOK__FLEXRAN_MESSAGE__MSG_SF_TRIGGER_MSG*/
{0, 0, 0}, /*PROTOCOL__FLEXRAN_MESSAGE__MSG_UL_SR_INFO_MSG*/
{flexran_agent_enb_config_reply, 0, 0}, /*PROTOCOL__FLEXRAN_MESSAGE__MSG_ENB_CONFIG_REQUEST_MSG*/
{0, 0, 0}, /*PROTOCOL__FLEXRAN_MESSAGE__MSG_ENB_CONFIG_REPLY_MSG*/
{flexran_agent_ue_config_reply, 0, 0}, /*PROTOCOL__FLEXRAN_MESSAGE__MSG_UE_CONFIG_REQUEST_MSG*/
{0, 0, 0}, /*PROTOCOL__FLEXRAN_MESSAGE__MSG_UE_CONFIG_REPLY_MSG*/
{flexran_agent_lc_config_reply, 0, 0}, /*PROTOCOL__FLEXRAN_MESSAGE__MSG_LC_CONFIG_REQUEST_MSG*/
{0, 0, 0}, /*PROTOCOL__FLEXRAN_MESSAGE__MSG_LC_CONFIG_REPLY_MSG*/
{flexran_agent_mac_handle_dl_mac_config, 0, 0}, /*PROTOCOL__FLEXRAN_MESSAGE__MSG_DL_MAC_CONFIG_MSG*/
{0, 0, 0}, /*PROTOCOL__FLEXRAN_MESSAGE__MSG_UE_STATE_CHANGE_MSG*/
{flexran_agent_control_delegation, 0, 0}, /*PROTOCOL__FLEXRAN_MESSAGE__MSG_CONTROL_DELEGATION_MSG*/
{flexran_agent_reconfiguration, 0, 0}, /*PROTOCOL__FLEXRAN_MESSAGE__MSG_AGENT_RECONFIGURATION_MSG*/
{flexran_agent_rrc_measurement, 0, 0}, /*PROTOCOL__FLEXRAN_MESSAGE__MSG_RRC_TRIGGERING_MSG*/
};
flexran_agent_message_destruction_callback message_destruction_callback[] = {
flexran_agent_destroy_hello,
flexran_agent_destroy_echo_request,
flexran_agent_destroy_echo_reply,
flexran_agent_destroy_stats_request,
flexran_agent_mac_destroy_stats_reply,
flexran_agent_mac_destroy_sf_trigger,
flexran_agent_mac_destroy_sr_info,
flexran_agent_destroy_enb_config_request,
flexran_agent_destroy_enb_config_reply,
flexran_agent_destroy_ue_config_request,
flexran_agent_destroy_ue_config_reply,
flexran_agent_destroy_lc_config_request,
flexran_agent_destroy_lc_config_reply,
flexran_agent_mac_destroy_dl_config,
flexran_agent_destroy_ue_state_change,
flexran_agent_destroy_control_delegation,
flexran_agent_destroy_agent_reconfiguration,
};
/* static const char *flexran_agent_direction2String[] = { */
/* "", /\* not_set *\/ */
/* "originating message", /\* originating message *\/ */
/* "successfull outcome", /\* successfull outcome *\/ */
/* "unsuccessfull outcome", /\* unsuccessfull outcome *\/ */
/* }; */
Protocol__FlexranMessage* flexran_agent_handle_message (mid_t mod_id,
uint8_t *data,
uint32_t size){
Protocol__FlexranMessage *decoded_message, *reply_message;
err_code_t err_code;
DevAssert(data != NULL);
if (flexran_agent_deserialize_message(data, size, &decoded_message) < 0) {
err_code= PROTOCOL__FLEXRAN_ERR__MSG_DECODING;
goto error;
}
if ((decoded_message->msg_case > sizeof(agent_messages_callback) / (3 * sizeof(flexran_agent_message_decoded_callback))) ||
(decoded_message->msg_dir > PROTOCOL__FLEXRAN_DIRECTION__UNSUCCESSFUL_OUTCOME)){
err_code= PROTOCOL__FLEXRAN_ERR__MSG_NOT_HANDLED;
goto error;
}
if (agent_messages_callback[decoded_message->msg_case-1][decoded_message->msg_dir-1] == NULL) {
err_code= PROTOCOL__FLEXRAN_ERR__MSG_NOT_SUPPORTED;
goto error;
}
err_code = ((*agent_messages_callback[decoded_message->msg_case-1][decoded_message->msg_dir-1])(mod_id, (void *) decoded_message, &reply_message));
if ( err_code < 0 ){
goto error;
} else if (err_code == 1) { //If err_code > 1, we do not want to dispose the message yet
protocol__flexran_message__free_unpacked(decoded_message, NULL);
}
return reply_message;
error:
LOG_E(FLEXRAN_AGENT,"errno %d occured\n",err_code);
return NULL;
}
void * flexran_agent_pack_message(Protocol__FlexranMessage *msg,
int * size){
void * buffer;
if (flexran_agent_serialize_message(msg, &buffer, size) < 0 ) {
LOG_E(FLEXRAN_AGENT,"errno %d occured\n",PROTOCOL__FLEXRAN_ERR__MSG_ENCODING);
goto error;
}
// free the msg --> later keep this in the data struct and just update the values
//TODO call proper destroy function
((*message_destruction_callback[msg->msg_case-1])(msg));
DevAssert(buffer !=NULL);
LOG_D(FLEXRAN_AGENT,"Serilized the eNB-UE stats reply (size %d)\n", *size);
return buffer;
error :
return NULL;
}
Protocol__FlexranMessage *flexran_agent_handle_timed_task(void *args) {
err_code_t err_code;
flexran_agent_timer_args_t *timer_args = (flexran_agent_timer_args_t *) args;
Protocol__FlexranMessage *timed_task, *reply_message;
timed_task = timer_args->msg;
err_code = ((*agent_messages_callback[timed_task->msg_case-1][timed_task->msg_dir-1])(timer_args->mod_id, (void *) timed_task, &reply_message));
if ( err_code < 0 ){
goto error;
}
return reply_message;
error:
LOG_E(FLEXRAN_AGENT,"errno %d occured\n",err_code);
return NULL;
}
Protocol__FlexranMessage* flexran_agent_process_timeout(long timer_id, void* timer_args){
struct flexran_agent_timer_element_s *found = get_timer_entry(timer_id);
if (found == NULL ) goto error;
LOG_D(FLEXRAN_AGENT, "Found the entry (%p): timer_id is 0x%lx 0x%lx\n", found, timer_id, found->timer_id);
if (timer_args == NULL)
LOG_W(FLEXRAN_AGENT,"null timer args\n");
return found->cb(timer_args);
error:
LOG_E(FLEXRAN_AGENT, "can't get the timer element\n");
return NULL;
}
err_code_t flexran_agent_destroy_flexran_message(Protocol__FlexranMessage *msg) {
return ((*message_destruction_callback[msg->msg_case-1])(msg));
}
/*
Top Level Statistics Report
*/
int flexran_agent_handle_stats(mid_t mod_id, const void *params, Protocol__FlexranMessage **msg){
// TODO: Must deal with sanitization of input
// TODO: Must check if RNTIs and cell ids of the request actually exist
// TODO: Must resolve conflicts among stats requests
int i;
err_code_t err_code;
xid_t xid;
uint32_t usec_interval, sec_interval;
//TODO: We do not deal with multiple CCs at the moment and eNB id is 0
int enb_id = mod_id;
//eNB_MAC_INST *eNB = &eNB_mac_inst[enb_id];
//UE_list_t *eNB_UE_list= &eNB->UE_list;
report_config_t report_config;
uint32_t ue_flags = 0;
uint32_t c_flags = 0;
Protocol__FlexranMessage *input = (Protocol__FlexranMessage *)params;
Protocol__FlexStatsRequest *stats_req = input->stats_request_msg;
xid = (stats_req->header)->xid;
// Check the type of request that is made
switch(stats_req->body_case) {
case PROTOCOL__FLEX_STATS_REQUEST__BODY_COMPLETE_STATS_REQUEST: ;
Protocol__FlexCompleteStatsRequest *comp_req = stats_req->complete_stats_request;
if (comp_req->report_frequency == PROTOCOL__FLEX_STATS_REPORT_FREQ__FLSRF_OFF) {
/*Disable both periodic and continuous updates*/
// flexran_agent_disable_cont_stats_update(mod_id);
flexran_agent_destroy_timer_by_task_id(xid);
*msg = NULL;
return 0;
} else { //One-off, periodical or continuous reporting
//Set the proper flags
ue_flags = comp_req->ue_report_flags;
c_flags = comp_req->cell_report_flags;
//Create a list of all eNB RNTIs and cells
//Set the number of UEs and create list with their RNTIs stats configs
report_config.nr_ue = flexran_get_num_ues(mod_id); //eNB_UE_list->num_UEs
report_config.ue_report_type = (ue_report_type_t *) malloc(sizeof(ue_report_type_t) * report_config.nr_ue);
if (report_config.ue_report_type == NULL) {
// TODO: Add appropriate error code
err_code = -100;
goto error;
}
for (i = 0; i < report_config.nr_ue; i++) {
report_config.ue_report_type[i].ue_rnti = flexran_get_ue_crnti(enb_id, i); //eNB_UE_list->eNB_UE_stats[UE_PCCID(enb_id,i)][i].crnti;
report_config.ue_report_type[i].ue_report_flags = ue_flags;
}
//Set the number of CCs and create a list with the cell stats configs
report_config.nr_cc = MAX_NUM_CCs;
report_config.cc_report_type = (cc_report_type_t *) malloc(sizeof(cc_report_type_t) * report_config.nr_cc);
if (report_config.cc_report_type == NULL) {
// TODO: Add appropriate error code
err_code = -100;
goto error;
}
for (i = 0; i < report_config.nr_cc; i++) {
//TODO: Must fill in the proper cell ids
report_config.cc_report_type[i].cc_id = i;
report_config.cc_report_type[i].cc_report_flags = c_flags;
}
/* Check if request was periodical */
if (comp_req->report_frequency == PROTOCOL__FLEX_STATS_REPORT_FREQ__FLSRF_PERIODICAL) {
/* Create a one off flexran message as an argument for the periodical task */
Protocol__FlexranMessage *timer_msg;
stats_request_config_t request_config;
request_config.report_type = PROTOCOL__FLEX_STATS_TYPE__FLST_COMPLETE_STATS;
request_config.report_frequency = PROTOCOL__FLEX_STATS_REPORT_FREQ__FLSRF_ONCE;
request_config.period = 0;
/* Need to make sure that the ue flags are saved (Bug) */
if (report_config.nr_ue == 0) {
report_config.nr_ue = 1;
report_config.ue_report_type = (ue_report_type_t *) malloc(sizeof(ue_report_type_t));
if (report_config.ue_report_type == NULL) {
// TODO: Add appropriate error code
err_code = -100;
goto error;
}
report_config.ue_report_type[0].ue_rnti = 0; // Dummy value
report_config.ue_report_type[0].ue_report_flags = ue_flags;
}
request_config.config = &report_config;
flexran_agent_stats_request(enb_id, xid, &request_config, &timer_msg);
/* Create a timer */
long timer_id = 0;
flexran_agent_timer_args_t *timer_args;
timer_args = malloc(sizeof(flexran_agent_timer_args_t));
memset (timer_args, 0, sizeof(flexran_agent_timer_args_t));
timer_args->mod_id = enb_id;
timer_args->msg = timer_msg;
/*Convert subframes to usec time*/
usec_interval = 1000*comp_req->sf;
sec_interval = 0;
/*add seconds if required*/
if (usec_interval >= 1000*1000) {
sec_interval = usec_interval/(1000*1000);
usec_interval = usec_interval%(1000*1000);
}
flexran_agent_create_timer(sec_interval, usec_interval, FLEXRAN_AGENT_DEFAULT, enb_id, FLEXRAN_AGENT_TIMER_TYPE_PERIODIC, xid, flexran_agent_handle_timed_task,(void*) timer_args, &timer_id);
} else if (comp_req->report_frequency == PROTOCOL__FLEX_STATS_REPORT_FREQ__FLSRF_CONTINUOUS) {
/*If request was for continuous updates, disable the previous configuration and
set up a new one*/
flexran_agent_disable_cont_stats_update(mod_id);
stats_request_config_t request_config;
request_config.report_type = PROTOCOL__FLEX_STATS_TYPE__FLST_COMPLETE_STATS;
request_config.report_frequency = PROTOCOL__FLEX_STATS_REPORT_FREQ__FLSRF_ONCE;
request_config.period = 0;
/* Need to make sure that the ue flags are saved (Bug) */
if (report_config.nr_ue == 0) {
report_config.nr_ue = 1;
report_config.ue_report_type = (ue_report_type_t *) malloc(sizeof(ue_report_type_t));
if (report_config.ue_report_type == NULL) {
// TODO: Add appropriate error code
err_code = -100;
goto error;
}
report_config.ue_report_type[0].ue_rnti = 0; // Dummy value
report_config.ue_report_type[0].ue_report_flags = ue_flags;
}
request_config.config = &report_config;
flexran_agent_enable_cont_stats_update(enb_id, xid, &request_config);
}
}
break;
case PROTOCOL__FLEX_STATS_REQUEST__BODY_CELL_STATS_REQUEST:;
Protocol__FlexCellStatsRequest *cell_req = stats_req->cell_stats_request;
// UE report config will be blank
report_config.nr_ue = 0;
report_config.ue_report_type = NULL;
report_config.nr_cc = cell_req->n_cell;
report_config.cc_report_type = (cc_report_type_t *) malloc(sizeof(cc_report_type_t) * report_config.nr_cc);
if (report_config.cc_report_type == NULL) {
// TODO: Add appropriate error code
err_code = -100;
goto error;
}
for (i = 0; i < report_config.nr_cc; i++) {
//TODO: Must fill in the proper cell ids
report_config.cc_report_type[i].cc_id = cell_req->cell[i];
report_config.cc_report_type[i].cc_report_flags = cell_req->flags;
}
break;
case PROTOCOL__FLEX_STATS_REQUEST__BODY_UE_STATS_REQUEST:;
Protocol__FlexUeStatsRequest *ue_req = stats_req->ue_stats_request;
// Cell report config will be blank
report_config.nr_cc = 0;
report_config.cc_report_type = NULL;
report_config.nr_ue = ue_req->n_rnti;
report_config.ue_report_type = (ue_report_type_t *) malloc(sizeof(ue_report_type_t) * report_config.nr_ue);
if (report_config.ue_report_type == NULL) {
// TODO: Add appropriate error code
err_code = -100;
goto error;
}
for (i = 0; i < report_config.nr_ue; i++) {
report_config.ue_report_type[i].ue_rnti = ue_req->rnti[i];
report_config.ue_report_type[i].ue_report_flags = ue_req->flags;
}
break;
default:
//TODO: Add appropriate error code
err_code = -100;
goto error;
}
if (flexran_agent_stats_reply(enb_id, xid, &report_config, msg )){
err_code = PROTOCOL__FLEXRAN_ERR__MSG_BUILD;
goto error;
}
free(report_config.ue_report_type);
free(report_config.cc_report_type);
return 0;
error :
LOG_E(FLEXRAN_AGENT, "errno %d occured\n", err_code);
return err_code;
}
/*
Top level reply
*/
int flexran_agent_stats_reply(mid_t enb_id, xid_t xid, const report_config_t *report_config, Protocol__FlexranMessage **msg){
Protocol__FlexHeader *header = NULL;
err_code_t err_code;
int i;
if (flexran_create_header(xid, PROTOCOL__FLEX_TYPE__FLPT_STATS_REPLY, &header) != 0)
goto error;
Protocol__FlexStatsReply *stats_reply_msg;
stats_reply_msg = malloc(sizeof(Protocol__FlexStatsReply));
if (stats_reply_msg == NULL)
goto error;
protocol__flex_stats_reply__init(stats_reply_msg);
stats_reply_msg->header = header;
stats_reply_msg->n_ue_report = report_config->nr_ue;
stats_reply_msg->n_cell_report = report_config->nr_cc;
// UE report
Protocol__FlexUeStatsReport **ue_report;
ue_report = malloc(sizeof(Protocol__FlexUeStatsReport *) * report_config->nr_ue);
if (ue_report == NULL)
goto error;
for (i = 0; i < report_config->nr_ue; i++) {
ue_report[i] = malloc(sizeof(Protocol__FlexUeStatsReport));
protocol__flex_ue_stats_report__init(ue_report[i]);
ue_report[i]->rnti = report_config->ue_report_type[i].ue_rnti;
ue_report[i]->has_rnti = 1;
ue_report[i]->flags = report_config->ue_report_type[i].ue_report_flags;
ue_report[i]->has_flags = 1;
}
// cell rpoert
Protocol__FlexCellStatsReport **cell_report;
cell_report = malloc(sizeof(Protocol__FlexCellStatsReport *) * report_config->nr_cc);
if (cell_report == NULL)
goto error;
for (i = 0; i < report_config->nr_cc; i++) {
cell_report[i] = malloc(sizeof(Protocol__FlexCellStatsReport));
if(cell_report[i] == NULL)
goto error;
protocol__flex_cell_stats_report__init(cell_report[i]);
cell_report[i]->carrier_index = report_config->cc_report_type[i].cc_id;
cell_report[i]->has_carrier_index = 1;
cell_report[i]->flags = report_config->cc_report_type[i].cc_report_flags;
cell_report[i]->has_flags = 1;
}
/*
MAC reply split
*/
if (flexran_agent_mac_stats_reply(enb_id, report_config, ue_report, cell_report) < 0 ) {
err_code = PROTOCOL__FLEXRAN_ERR__MSG_BUILD;
goto error;
}
/*
RRC reply split
*/
if (flexran_agent_rrc_stats_reply(enb_id, report_config, ue_report, cell_report) < 0 ) {
err_code = PROTOCOL__FLEXRAN_ERR__MSG_BUILD;
goto error;
}
/*
PDCP reply split
*/
if (flexran_agent_pdcp_stats_reply(enb_id, report_config, ue_report, cell_report) < 0 ) {
err_code = PROTOCOL__FLEXRAN_ERR__MSG_BUILD;
goto error;
}
stats_reply_msg->cell_report = cell_report;
stats_reply_msg->ue_report = ue_report;
*msg = malloc(sizeof(Protocol__FlexranMessage));
if(*msg == NULL)
goto error;
protocol__flexran_message__init(*msg);
(*msg)->msg_case = PROTOCOL__FLEXRAN_MESSAGE__MSG_STATS_REPLY_MSG;
(*msg)->msg_dir = PROTOCOL__FLEXRAN_DIRECTION__SUCCESSFUL_OUTCOME;
(*msg)->stats_reply_msg = stats_reply_msg;
return 0;
error :
LOG_E(FLEXRAN_AGENT, "errno %d occured\n", err_code);
return err_code;
}
/*
Top Level Request
*/
int flexran_agent_stats_request(mid_t mod_id,
xid_t xid,
const stats_request_config_t *report_config,
Protocol__FlexranMessage **msg) {
Protocol__FlexHeader *header = NULL;
int i;
Protocol__FlexStatsRequest *stats_request_msg;
stats_request_msg = malloc(sizeof(Protocol__FlexStatsRequest));
if(stats_request_msg == NULL)
goto error;
protocol__flex_stats_request__init(stats_request_msg);
if (flexran_create_header(xid, PROTOCOL__FLEX_TYPE__FLPT_STATS_REQUEST, &header) != 0)
goto error;
stats_request_msg->header = header;
stats_request_msg->type = report_config->report_type;
stats_request_msg->has_type = 1;
switch (report_config->report_type) {
case PROTOCOL__FLEX_STATS_TYPE__FLST_COMPLETE_STATS:
stats_request_msg->body_case = PROTOCOL__FLEX_STATS_REQUEST__BODY_COMPLETE_STATS_REQUEST;
Protocol__FlexCompleteStatsRequest *complete_stats;
complete_stats = malloc(sizeof(Protocol__FlexCompleteStatsRequest));
if(complete_stats == NULL)
goto error;
protocol__flex_complete_stats_request__init(complete_stats);
complete_stats->report_frequency = report_config->report_frequency;
complete_stats->has_report_frequency = 1;
complete_stats->sf = report_config->period;
complete_stats->has_sf = 1;
complete_stats->has_cell_report_flags = 1;
complete_stats->has_ue_report_flags = 1;
if (report_config->config->nr_cc > 0) {
complete_stats->cell_report_flags = report_config->config->cc_report_type[0].cc_report_flags;
}
if (report_config->config->nr_ue > 0) {
complete_stats->ue_report_flags = report_config->config->ue_report_type[0].ue_report_flags;
}
stats_request_msg->complete_stats_request = complete_stats;
break;
case PROTOCOL__FLEX_STATS_TYPE__FLST_CELL_STATS:
stats_request_msg->body_case = PROTOCOL__FLEX_STATS_REQUEST__BODY_CELL_STATS_REQUEST;
Protocol__FlexCellStatsRequest *cell_stats;
cell_stats = malloc(sizeof(Protocol__FlexCellStatsRequest));
if(cell_stats == NULL)
goto error;
protocol__flex_cell_stats_request__init(cell_stats);
cell_stats->n_cell = report_config->config->nr_cc;
cell_stats->has_flags = 1;
if (cell_stats->n_cell > 0) {
uint32_t *cells;
cells = (uint32_t *) malloc(sizeof(uint32_t)*cell_stats->n_cell);
for (i = 0; i < cell_stats->n_cell; i++) {
cells[i] = report_config->config->cc_report_type[i].cc_id;
}
cell_stats->cell = cells;
cell_stats->flags = report_config->config->cc_report_type[i].cc_report_flags;
}
stats_request_msg->cell_stats_request = cell_stats;
break;
case PROTOCOL__FLEX_STATS_TYPE__FLST_UE_STATS:
stats_request_msg->body_case = PROTOCOL__FLEX_STATS_REQUEST__BODY_UE_STATS_REQUEST;
Protocol__FlexUeStatsRequest *ue_stats;
ue_stats = malloc(sizeof(Protocol__FlexUeStatsRequest));
if(ue_stats == NULL)
goto error;
protocol__flex_ue_stats_request__init(ue_stats);
ue_stats->n_rnti = report_config->config->nr_ue;
ue_stats->has_flags = 1;
if (ue_stats->n_rnti > 0) {
uint32_t *ues;
ues = (uint32_t *) malloc(sizeof(uint32_t)*ue_stats->n_rnti);
for (i = 0; i < ue_stats->n_rnti; i++) {
ues[i] = report_config->config->ue_report_type[i].ue_rnti;
}
ue_stats->rnti = ues;
ue_stats->flags = report_config->config->ue_report_type[i].ue_report_flags;
}
stats_request_msg->ue_stats_request = ue_stats;
break;
default:
goto error;
}
*msg = malloc(sizeof(Protocol__FlexranMessage));
if(*msg == NULL)
goto error;
protocol__flexran_message__init(*msg);
(*msg)->msg_case = PROTOCOL__FLEXRAN_MESSAGE__MSG_STATS_REQUEST_MSG;
(*msg)->msg_dir = PROTOCOL__FLEXRAN_DIRECTION__INITIATING_MESSAGE;
(*msg)->stats_request_msg = stats_request_msg;
return 0;
error:
// TODO: Need to make proper error handling
if (header != NULL)
free(header);
if (stats_request_msg != NULL)
free(stats_request_msg);
if(*msg != NULL)
free(*msg);
//LOG_E(MAC, "%s: an error occured\n", __FUNCTION__);
return -1;
}
int flexran_agent_destroy_stats_request(Protocol__FlexranMessage *msg) {
if(msg->msg_case != PROTOCOL__FLEXRAN_MESSAGE__MSG_STATS_REQUEST_MSG)
goto error;
free(msg->stats_request_msg->header);
if (msg->stats_request_msg->body_case == PROTOCOL__FLEX_STATS_REQUEST__BODY_CELL_STATS_REQUEST) {
free(msg->stats_request_msg->cell_stats_request->cell);
}
if (msg->stats_request_msg->body_case == PROTOCOL__FLEX_STATS_REQUEST__BODY_UE_STATS_REQUEST) {
free(msg->stats_request_msg->ue_stats_request->rnti);
}
free(msg->stats_request_msg);
free(msg);
return 0;
error:
//LOG_E(MAC, "%s: an error occured\n", __FUNCTION__);
return -1;
}
/*
Top Level Update
*/
void flexran_agent_send_update_stats(mid_t mod_id) {
Protocol__FlexranMessage *current_report = NULL;
void *data;
int size;
err_code_t err_code;
int priority = 0;
if (pthread_mutex_lock(stats_context[mod_id].mutex)) {
goto error;
}
if (stats_context[mod_id].cont_update == 1) {
/*Create a fresh report with the required flags*/
err_code = flexran_agent_handle_stats(mod_id, (void *) stats_context[mod_id].stats_req, ¤t_report);
if (err_code < 0) {
goto error;
}
}
/* /\*TODO:Check if a previous reports exists and if yes, generate a report */
/* *that is the diff between the old and the new report, */
/* *respecting the thresholds. Otherwise send the new report*\/ */
/* if (stats_context[mod_id].prev_stats_reply != NULL) { */
/* msg = flexran_agent_generate_diff_mac_stats_report(current_report, stats_context[mod_id].prev_stats_reply); */
/* /\*Destroy the old stats*\/ */
/* flexran_agent_destroy_flexran_message(stats_context[mod_id].prev_stats_reply); */
/* } */
/* /\*Use the current report for future comparissons*\/ */
/* stats_context[mod_id].prev_stats_reply = current_report; */
if (pthread_mutex_unlock(stats_context[mod_id].mutex)) {
goto error;
}
if (current_report != NULL){
data=flexran_agent_pack_message(current_report, &size);
/*Send any stats updates using the MAC channel of the eNB*/
if (flexran_agent_msg_send(mod_id, FLEXRAN_AGENT_MAC, data, size, priority)) {
err_code = PROTOCOL__FLEXRAN_ERR__MSG_ENQUEUING;
goto error;
}
LOG_D(FLEXRAN_AGENT,"sent message with size %d\n", size);
return;
}
error:
LOG_D(FLEXRAN_AGENT, "Could not send sf trigger message\n");
}
err_code_t flexran_agent_disable_cont_stats_update(mid_t mod_id) {
/*Disable the continuous updates for the MAC*/
if (pthread_mutex_lock(stats_context[mod_id].mutex)) {
goto error;
}
stats_context[mod_id].cont_update = 0;
stats_context[mod_id].xid = 0;
if (stats_context[mod_id].stats_req != NULL) {
flexran_agent_destroy_flexran_message(stats_context[mod_id].stats_req);
}
if (stats_context[mod_id].prev_stats_reply != NULL) {
flexran_agent_destroy_flexran_message(stats_context[mod_id].prev_stats_reply);
}
if (pthread_mutex_unlock(stats_context[mod_id].mutex)) {
goto error;
}
return 0;
error:
LOG_E(FLEXRAN_AGENT, "stats_context for eNB %d is not initialized\n", mod_id);
return -1;
}
err_code_t flexran_agent_enable_cont_stats_update(mid_t mod_id,
xid_t xid, stats_request_config_t *stats_req) {
if (pthread_mutex_lock(stats_context[mod_id].mutex)) {
goto error;
}
Protocol__FlexranMessage *req_msg;
flexran_agent_stats_request(mod_id, xid, stats_req, &req_msg);
stats_context[mod_id].stats_req = req_msg;
stats_context[mod_id].prev_stats_reply = NULL;
stats_context[mod_id].cont_update = 1;
stats_context[mod_id].xid = xid;
if (pthread_mutex_unlock(stats_context[mod_id].mutex)) {
goto error;
}
return 0;
error:
LOG_E(FLEXRAN_AGENT, "stats_context for eNB %d is not initialized\n", mod_id);
return -1;
}
err_code_t flexran_agent_init_cont_stats_update(mid_t mod_id) {
/*Initially the continuous update is set to false*/
stats_context[mod_id].cont_update = 0;
stats_context[mod_id].is_initialized = 1;
stats_context[mod_id].stats_req = NULL;
stats_context[mod_id].prev_stats_reply = NULL;
stats_context[mod_id].mutex = calloc(1, sizeof(pthread_mutex_t));
if (stats_context[mod_id].mutex == NULL)
goto error;
if (pthread_mutex_init(stats_context[mod_id].mutex, NULL))
goto error;
return 0;
error:
return -1;
}
err_code_t flexran_agent_destroy_cont_stats_update(mid_t mod_id) {
stats_context[mod_id].cont_update = 0;
stats_context[mod_id].is_initialized = 0;
flexran_agent_destroy_flexran_message(stats_context[mod_id].stats_req);
flexran_agent_destroy_flexran_message(stats_context[mod_id].prev_stats_reply);
free(stats_context[mod_id].mutex);
return 1;
}