enb_agent_mac.c 44.5 KB
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 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268
/*******************************************************************************
    OpenAirInterface
    Copyright(c) 1999 - 2014 Eurecom

    OpenAirInterface 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.


    OpenAirInterface 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 OpenAirInterface.The full GNU General Public License is
   included in this distribution in the file called "COPYING". If not,
   see <http://www.gnu.org/licenses/>.

  Contact Information
  OpenAirInterface Admin: openair_admin@eurecom.fr
  OpenAirInterface Tech : openair_tech@eurecom.fr
  OpenAirInterface Dev  : openair4g-devel@lists.eurecom.fr

  Address      : Eurecom, Compus SophiaTech 450, route des chappes, 06451 Biot, France.

 *******************************************************************************/

/*! \file enb_agent_mac.c
 * \brief enb agent message handler for MAC layer
 * \author Navid Nikaein and Xenofon Foukas
 * \date 2016
 * \version 0.1
 */

#include "enb_agent_mac.h"
#include "enb_agent_extern.h"
#include "enb_agent_common.h"
#include "enb_agent_mac_internal.h"

#include "log.h"


/*Flags showing if a mac agent has already been registered*/
unsigned int mac_agent_registered[NUM_MAX_ENB];

/*Array containing the Agent-MAC interfaces*/
AGENT_MAC_xface *agent_mac_xface[NUM_MAX_ENB];

int enb_agent_mac_handle_stats(mid_t mod_id, const void *params, Protocol__ProgranMessage **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;
  void *buffer;
  int size;
  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 cc_id = 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__ProgranMessage *input = (Protocol__ProgranMessage *)params;

  Protocol__PrpStatsRequest *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__PRP_STATS_REQUEST__BODY_COMPLETE_STATS_REQUEST: ;
    Protocol__PrpCompleteStatsRequest *comp_req = stats_req->complete_stats_request;
    if (comp_req->report_frequency == PROTOCOL__PRP_STATS_REPORT_FREQ__PRSRF_OFF) {
      /*Disable both periodic and continuous updates*/
      enb_agent_disable_cont_mac_stats_update(mod_id);
      enb_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 = 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 = 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__PRP_STATS_REPORT_FREQ__PRSRF_PERIODICAL) {
	/* Create a one off progran message as an argument for the periodical task */
	Protocol__ProgranMessage *timer_msg;
	stats_request_config_t request_config;
	request_config.report_type = PROTOCOL__PRP_STATS_TYPE__PRST_COMPLETE_STATS;
	request_config.report_frequency = PROTOCOL__PRP_STATS_REPORT_FREQ__PRSRF_ONCE;
	request_config.period = 0; 
	request_config.config = &report_config;
	enb_agent_mac_stats_request(enb_id, xid, &request_config, &timer_msg);
	/* Create a timer */
	long timer_id = 0;
	enb_agent_timer_args_t *timer_args;
	timer_args = malloc(sizeof(enb_agent_timer_args_t));
	memset (timer_args, 0, sizeof(enb_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);
	}
	enb_agent_create_timer(sec_interval, usec_interval, ENB_AGENT_DEFAULT, enb_id, ENB_AGENT_TIMER_TYPE_PERIODIC, xid, enb_agent_handle_timed_task,(void*) timer_args, &timer_id);
      } else if (comp_req->report_frequency == PROTOCOL__PRP_STATS_REPORT_FREQ__PRSRF_CONTINUOUS) {
	/*If request was for continuous updates, disable the previous configuration and
	  set up a new one*/
	enb_agent_disable_cont_mac_stats_update(mod_id);
	stats_request_config_t request_config;
	request_config.report_type = PROTOCOL__PRP_STATS_TYPE__PRST_COMPLETE_STATS;
	request_config.report_frequency = PROTOCOL__PRP_STATS_REPORT_FREQ__PRSRF_ONCE;
	request_config.period = 0; 
	request_config.config = &report_config;
	enb_agent_enable_cont_mac_stats_update(enb_id, xid, &request_config);
      }
    }
    break;
  case PROTOCOL__PRP_STATS_REQUEST__BODY_CELL_STATS_REQUEST:;
    Protocol__PrpCellStatsRequest *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__PRP_STATS_REQUEST__BODY_UE_STATS_REQUEST:;
    Protocol__PrpUeStatsRequest *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 (enb_agent_mac_stats_reply(enb_id, xid, &report_config, msg) < 0 ){
    err_code = PROTOCOL__PROGRAN_ERR__MSG_BUILD;
    goto error;
  }

  free(report_config.ue_report_type);
  free(report_config.cc_report_type);

  return 0;

 error :
  LOG_E(ENB_AGENT, "errno %d occured\n", err_code);
  return err_code;
}

int enb_agent_mac_stats_request(mid_t mod_id,
				xid_t xid,
				const stats_request_config_t *report_config, 
				Protocol__ProgranMessage **msg) {
  Protocol__PrpHeader *header;
  int i;
   
  if (prp_create_header(xid, PROTOCOL__PRP_TYPE__PRPT_STATS_REQUEST, &header) != 0)
    goto error;
  
  Protocol__PrpStatsRequest *stats_request_msg;
  stats_request_msg = malloc(sizeof(Protocol__PrpStatsRequest));
  if(stats_request_msg == NULL)
    goto error;

  protocol__prp_stats_request__init(stats_request_msg);
  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__PRP_STATS_TYPE__PRST_COMPLETE_STATS:
    stats_request_msg->body_case =  PROTOCOL__PRP_STATS_REQUEST__BODY_COMPLETE_STATS_REQUEST;
    Protocol__PrpCompleteStatsRequest *complete_stats;
    complete_stats = malloc(sizeof(Protocol__PrpCompleteStatsRequest));
    if(complete_stats == NULL)
      goto error;
    protocol__prp_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__PRP_STATS_TYPE__PRST_CELL_STATS:
    stats_request_msg->body_case = PROTOCOL__PRP_STATS_REQUEST__BODY_CELL_STATS_REQUEST;
     Protocol__PrpCellStatsRequest *cell_stats;
     cell_stats = malloc(sizeof(Protocol__PrpCellStatsRequest));
    if(cell_stats == NULL)
      goto error;
    protocol__prp_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__PRP_STATS_TYPE__PRST_UE_STATS:
    stats_request_msg->body_case = PROTOCOL__PRP_STATS_REQUEST__BODY_UE_STATS_REQUEST;
     Protocol__PrpUeStatsRequest *ue_stats;
     ue_stats = malloc(sizeof(Protocol__PrpUeStatsRequest));
    if(ue_stats == NULL)
      goto error;
    protocol__prp_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__ProgranMessage));
  if(*msg == NULL)
    goto error;
  protocol__progran_message__init(*msg);
  (*msg)->msg_case = PROTOCOL__PROGRAN_MESSAGE__MSG_STATS_REQUEST_MSG;
  (*msg)->msg_dir = PROTOCOL__PROGRAN_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 enb_agent_mac_destroy_stats_request(Protocol__ProgranMessage *msg) {
   if(msg->msg_case != PROTOCOL__PROGRAN_MESSAGE__MSG_STATS_REQUEST_MSG)
    goto error;
  free(msg->stats_request_msg->header);
  if (msg->stats_request_msg->body_case == PROTOCOL__PRP_STATS_REQUEST__BODY_CELL_STATS_REQUEST) {
    free(msg->stats_request_msg->cell_stats_request->cell);
  }
  if (msg->stats_request_msg->body_case == PROTOCOL__PRP_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;
}

int enb_agent_mac_stats_reply(mid_t mod_id,
			      xid_t xid,
			      const report_config_t *report_config, 
			      Protocol__ProgranMessage **msg) {
  Protocol__PrpHeader *header;
  int i, j, k;
  int cc_id = 0;
  int enb_id = mod_id;
  //eNB_MAC_INST *eNB = &eNB_mac_inst[enb_id];
  //UE_list_t *eNB_UE_list=  &eNB->UE_list;
  
  
  if (prp_create_header(xid, PROTOCOL__PRP_TYPE__PRPT_STATS_REPLY, &header) != 0)
    goto error;

  Protocol__PrpStatsReply *stats_reply_msg;
  stats_reply_msg = malloc(sizeof(Protocol__PrpStatsReply));
  if (stats_reply_msg == NULL)
    goto error;
  protocol__prp_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;

  Protocol__PrpUeStatsReport **ue_report;
  Protocol__PrpCellStatsReport **cell_report;

  
  /* Allocate memory for list of UE reports */
  if (report_config->nr_ue > 0) {
    ue_report = malloc(sizeof(Protocol__PrpUeStatsReport *) * 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__PrpUeStatsReport));
      protocol__prp_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;
      /* Check the types of reports that need to be constructed based on flag values */

      /* Check flag for creation of buffer status report */
      if (report_config->ue_report_type[i].ue_report_flags & PROTOCOL__PRP_UE_STATS_TYPE__PRUST_BSR) {
	//TODO: Create a report for each LCG (4 elements). See prp_ue_stats_report of
	// progRAN specifications for more details
	ue_report[i]->n_bsr = 4;
	uint32_t *elem;
	elem = (uint32_t *) malloc(sizeof(uint32_t)*ue_report[i]->n_bsr);
	if (elem == NULL)
	  goto error;
	for (j = 0; j++; j < ue_report[i]->n_bsr) {
	  // Set the actual BSR for LCG j of the current UE
	  // NN: we need to know the cc_id here, consider the first one
	  elem[j] = get_ue_bsr (enb_id, i, j); //eNB_UE_list->UE_template[UE_PCCID(enb_id,i)][i].bsr_info[j];
	}
	ue_report[i]->bsr = elem;
      }
      
      /* Check flag for creation of PRH report */
      if (report_config->ue_report_type[i].ue_report_flags & PROTOCOL__PRP_UE_STATS_TYPE__PRUST_PRH) {
	// TODO: Fill in the actual power headroom value for the RNTI
	ue_report[i]->phr = get_ue_phr (enb_id, i); // eNB_UE_list->UE_template[UE_PCCID(enb_id,i)][i].phr_info;
	ue_report[i]->has_phr = 1;
      }

      /* Check flag for creation of RLC buffer status report */
      if (report_config->ue_report_type[i].ue_report_flags & PROTOCOL__PRP_UE_STATS_TYPE__PRUST_RLC_BS) {
	// TODO: Fill in the actual RLC buffer status reports
	ue_report[i]->n_rlc_report = 1; // Set this to the number of LCs for this UE
	Protocol__PrpRlcBsr ** rlc_reports;
	rlc_reports = malloc(sizeof(Protocol__PrpRlcBsr) * ue_report[i]->n_rlc_report);
	if (rlc_reports == NULL)
	  goto error;
	
	// Fill the buffer status report for each logical channel of the UE
	// NN: see LAYER2/openair2_proc.c for rlc status
	for (j = 0; j < ue_report[i]->n_rlc_report; j++) {
	  rlc_reports[j] = malloc(sizeof(Protocol__PrpRlcBsr));
	  if (rlc_reports[j] == NULL)
	    goto error;
	  protocol__prp_rlc_bsr__init(rlc_reports[j]);
	  //TODO:Set logical channel id
	  rlc_reports[j]->lc_id = 1;
	  rlc_reports[j]->has_lc_id = 1;
	  //TODO:Set tx queue size in bytes
	  rlc_reports[j]->tx_queue_size = 10;
	  rlc_reports[j]->has_tx_queue_size = 1;
	  //TODO:Set tx queue head of line delay in ms
	  rlc_reports[j]->tx_queue_hol_delay = 100;
	  rlc_reports[j]->has_tx_queue_hol_delay = 1;
	  //TODO:Set retransmission queue size in bytes
	  rlc_reports[j]->retransmission_queue_size = 10;
	  rlc_reports[j]->has_retransmission_queue_size = 1;
	  //TODO:Set retransmission queue head of line delay in ms
	  rlc_reports[j]->retransmission_queue_hol_delay = 100;
	  rlc_reports[j]->has_retransmission_queue_hol_delay = 1;
	  //TODO:Set current size of the pending message in bytes
	  rlc_reports[j]->status_pdu_size = 100;
	  rlc_reports[j]->has_status_pdu_size = 1;
	}
	// Add RLC buffer status reports to the full report
	if (ue_report[i]->n_rlc_report > 0)
	  ue_report[i]->rlc_report = rlc_reports;
      }

      /* Check flag for creation of MAC CE buffer status report */
      if (report_config->ue_report_type[i].ue_report_flags & PROTOCOL__PRP_UE_STATS_TYPE__PRUST_MAC_CE_BS) {
	// TODO: Fill in the actual MAC CE buffer status report
	ue_report[i]->pending_mac_ces = -1; /* Use as bitmap. Set one or more of the
					       PROTOCOL__PRP_CE_TYPE__PRPCET_ values
					       found in stats_common.pb-c.h. See
					       prp_ce_type in progRAN specification */
	ue_report[i]->has_pending_mac_ces = 1;
      }
      
      /* Check flag for creation of DL CQI report */
      if (report_config->ue_report_type[i].ue_report_flags & PROTOCOL__PRP_UE_STATS_TYPE__PRUST_DL_CQI) {
	// TODO: Fill in the actual DL CQI report for the UE based on its configuration
	Protocol__PrpDlCqiReport * dl_report;
	dl_report = malloc(sizeof(Protocol__PrpDlCqiReport));
	if (dl_report == NULL)
	  goto error;
	protocol__prp_dl_cqi_report__init(dl_report);
	//TODO:Set the SFN and SF of the last report held in the agent.
	dl_report->sfn_sn = get_sfn_sf(enb_id);
	dl_report->has_sfn_sn = 1;
	//TODO:Set the number of DL CQI reports for this UE. One for each CC
	dl_report->n_csi_report = 1;
	//TODO:Create the actual CSI reports.
	Protocol__PrpDlCsi **csi_reports;
	csi_reports = malloc(sizeof(Protocol__PrpDlCsi *)*dl_report->n_csi_report);
	if (csi_reports == NULL)
	  goto error;
	for (j = 0; j < dl_report->n_csi_report; j++) {
	  csi_reports[j] = malloc(sizeof(Protocol__PrpDlCsi));
	  if (csi_reports[j] == NULL)
	    goto error;
	  protocol__prp_dl_csi__init(csi_reports[j]);
	  //TODO: the servCellIndex for this report
	  csi_reports[j]->serv_cell_index = 0;
	  csi_reports[j]->has_serv_cell_index = 1;
	  //TODO: the rank indicator value for this cc
	  csi_reports[j]->ri = 1;
	  csi_reports[j]->has_ri = 1;
	  //TODO: the type of CSI report based on the configuration of the UE
	  //For this example we use type P10, which only needs a wideband value
	  //The full set of types can be found in stats_common.pb-c.h and
	  //in the progRAN specifications
	  csi_reports[j]->type =  PROTOCOL__PRP_CSI_TYPE__PRCSIT_P10;
	  csi_reports[j]->has_type = 1;
	  csi_reports[j]->report_case = PROTOCOL__PRP_DL_CSI__REPORT_P10CSI;
	  Protocol__PrpCsiP10 *csi10;
	  csi10 = malloc(sizeof(Protocol__PrpCsiP10));
	  if (csi10 == NULL)
	    goto error;
	  protocol__prp_csi_p10__init(csi10);
	  //TODO: set the wideband value
	  // NN: this is also depends on cc_id
	  csi10->wb_cqi = get_ue_wcqi (enb_id, i); //eNB_UE_list->eNB_UE_stats[UE_PCCID(enb_id,i)][i].dl_cqi;
	  csi10->has_wb_cqi = 1;
	  //Add the type of measurements to the csi report in the proper union type
	  csi_reports[j]->p10csi = csi10;
	}
	//Add the csi reports to the full DL CQI report
	dl_report->csi_report = csi_reports;
	//Add the DL CQI report to the stats report
	ue_report[i]->dl_cqi_report = dl_report;
      }
      
      /* Check flag for creation of paging buffer status report */
      if (report_config->ue_report_type[i].ue_report_flags & PROTOCOL__PRP_UE_STATS_TYPE__PRUST_PBS) {
	//TODO: Fill in the actual paging buffer status report. For this field to be valid, the RNTI
	//set in the report must be a P-RNTI
	Protocol__PrpPagingBufferReport *paging_report;
	paging_report = malloc(sizeof(Protocol__PrpPagingBufferReport));
	if (paging_report == NULL)
	  goto error;
	protocol__prp_paging_buffer_report__init(paging_report);
	//Set the number of pending paging messages
	paging_report->n_paging_info = 1;
	//Provide a report for each pending paging message
	Protocol__PrpPagingInfo **p_info;
	p_info = malloc(sizeof(Protocol__PrpPagingInfo *) * paging_report->n_paging_info);
	if (p_info == NULL)
	  goto error;
	for (j = 0; j < paging_report->n_paging_info; j++) {
	  p_info[j] = malloc(sizeof(Protocol__PrpPagingInfo));
	  if(p_info[j] == NULL)
	    goto error;
	  protocol__prp_paging_info__init(p_info[j]);
	  //TODO: Set paging index. This index is the same that will be used for the scheduling of the
	  //paging message by the controller
	  p_info[j]->paging_index = 10;
	  p_info[j]->has_paging_index = 1;
	  //TODO:Set the paging message size
	  p_info[j]->paging_message_size = 100;
	  p_info[j]->has_paging_message_size = 1;
	  //TODO: Set the paging subframe
	  p_info[j]->paging_subframe = 10;
	  p_info[j]->has_paging_subframe = 1;
	  //TODO: Set the carrier index for the pending paging message
	  p_info[j]->carrier_index = 0;
	  p_info[j]->has_carrier_index = 1;
	}
	//Add all paging info to the paging buffer rerport
	paging_report->paging_info = p_info;
	//Add the paging report to the UE report
	ue_report[i]->pbr = paging_report;
      }
      
      /* Check flag for creation of UL CQI report */
      if (report_config->ue_report_type[i].ue_report_flags & PROTOCOL__PRP_UE_STATS_TYPE__PRUST_UL_CQI) {
	//Fill in the full UL CQI report of the UE
	Protocol__PrpUlCqiReport *full_ul_report;
	full_ul_report = malloc(sizeof(Protocol__PrpUlCqiReport));
	if(full_ul_report == NULL)
	  goto error;
	protocol__prp_ul_cqi_report__init(full_ul_report);
	//TODO:Set the SFN and SF of the generated report
	full_ul_report->sfn_sn = get_sfn_sf(enb_id);
	full_ul_report->has_sfn_sn = 1;
	//TODO:Set the number of UL measurement reports based on the types of measurements
	//configured for this UE and on the servCellIndex
	full_ul_report->n_cqi_meas = 1;
	Protocol__PrpUlCqi **ul_report;
	ul_report = malloc(sizeof(Protocol__PrpUlCqi *) * full_ul_report->n_cqi_meas);
	if(ul_report == NULL)
	  goto error;
	//Fill each UL report of the UE for each of the configured report types
	for(j = 0; j++; j < full_ul_report->n_cqi_meas) {
	  ul_report[j] = malloc(sizeof(Protocol__PrpUlCqi));
	  if(ul_report[j] == NULL)
	  goto error;
	  protocol__prp_ul_cqi__init(ul_report[j]);
	  //TODO: Set the type of the UL report. As an example set it to SRS UL report
	  // See enum prp_ul_cqi_type in progRAN specification for more details
	  ul_report[j]->type = PROTOCOL__PRP_UL_CQI_TYPE__PRUCT_SRS;
	  ul_report[j]->has_type = 1;
	  //TODO:Set the number of SINR measurements based on the report type
	  //See struct prp_ul_cqi in progRAN specification for more details
	  ul_report[j]->n_sinr = 100;
	  uint32_t *sinr_meas;
	  sinr_meas = (uint32_t *) malloc(sizeof(uint32_t) * ul_report[j]->n_sinr);
	  if (sinr_meas == NULL)
	    goto error;
	  //TODO:Set the SINR measurements for the specified type
	  for (k = 0; k < ul_report[j]->n_sinr; k++) {
	    sinr_meas[k] = 10;
	  }
	  ul_report[j]->sinr = sinr_meas;
	  //TODO: Set the servCellIndex for this report
	  ul_report[j]->serv_cell_index = 0;
	  ul_report[j]->has_serv_cell_index = 1;
	  //Set the list of UL reports of this UE to the full UL report
	  full_ul_report->cqi_meas = ul_report;
	  //Add full UL CQI report to the UE report
	  ue_report[i]->ul_cqi_report = full_ul_report;
	}
      }
    }
    /* Add list of all UE reports to the message */
    stats_reply_msg->ue_report = ue_report;
  }

  /* Allocate memory for list of cell reports */
  if (report_config->nr_cc > 0) {
    cell_report = malloc(sizeof(Protocol__PrpCellStatsReport *) * report_config->nr_cc);
    if (cell_report == NULL)
      goto error;
    // Fill in the Cell reports
    for (i = 0; i < report_config->nr_cc; i++) {
      cell_report[i] = malloc(sizeof(Protocol__PrpCellStatsReport));
      if(cell_report[i] == NULL)
	goto error;
      protocol__prp_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;

      /* Check flag for creation of noise and interference report */
      if(report_config->cc_report_type[i].cc_report_flags & PROTOCOL__PRP_CELL_STATS_TYPE__PRCST_NOISE_INTERFERENCE) {
	// TODO: Fill in the actual noise and interference report for this cell
	Protocol__PrpNoiseInterferenceReport *ni_report;
	ni_report = malloc(sizeof(Protocol__PrpNoiseInterferenceReport));
	if(ni_report == NULL)
	  goto error;
	protocol__prp_noise_interference_report__init(ni_report);
	// Current frame and subframe number
	ni_report->sfn_sf = get_sfn_sf(enb_id);
	ni_report->has_sfn_sf = 1;
	// Received interference power in dbm
	ni_report->rip = 0;
	ni_report->has_rip = 1;
	// Thermal noise power in dbm
	ni_report->tnp = 0;
	ni_report->has_tnp = 1;
	cell_report[i]->noise_inter_report = ni_report;
      }
    }
    /* Add list of all cell reports to the message */
    stats_reply_msg->cell_report = cell_report;
  }
  
  *msg = malloc(sizeof(Protocol__ProgranMessage));
  if(*msg == NULL)
    goto error;
  protocol__progran_message__init(*msg);
  (*msg)->msg_case = PROTOCOL__PROGRAN_MESSAGE__MSG_STATS_REPLY_MSG;
  (*msg)->msg_dir =  PROTOCOL__PROGRAN_DIRECTION__SUCCESSFUL_OUTCOME;
  (*msg)->stats_reply_msg = stats_reply_msg;
  return 0;
  
 error:
  // TODO: Need to make proper error handling
  if (header != NULL)
    free(header);
  if (stats_reply_msg != NULL)
    free(stats_reply_msg);
  if(*msg != NULL)
    free(*msg);
  //LOG_E(MAC, "%s: an error occured\n", __FUNCTION__);
  return -1;
}

int enb_agent_mac_destroy_stats_reply(Protocol__ProgranMessage *msg) {
  //TODO: Need to deallocate memory for the stats reply message
  if(msg->msg_case != PROTOCOL__PROGRAN_MESSAGE__MSG_STATS_REPLY_MSG)
    goto error;
  free(msg->stats_reply_msg->header);
  int i, j, k;
  
  Protocol__PrpStatsReply *reply = msg->stats_reply_msg;
  Protocol__PrpDlCqiReport *dl_report;
  Protocol__PrpUlCqiReport *ul_report;
  Protocol__PrpPagingBufferReport *paging_report;

  // Free the memory for the UE reports
  for (i = 0; i < reply->n_ue_report; i++) {
    free(reply->ue_report[i]->bsr);
    for (j = 0; j < reply->ue_report[i]->n_rlc_report; j++) {
      free(reply->ue_report[i]->rlc_report[j]);
    }
    free(reply->ue_report[i]->rlc_report);
    // If DL CQI report flag was set
    if (reply->ue_report[i]->flags & PROTOCOL__PRP_UE_STATS_TYPE__PRUST_DL_CQI) {
      dl_report = reply->ue_report[i]->dl_cqi_report;
      // Delete all CSI reports
      for (j = 0; j < dl_report->n_csi_report; j++) {
	//Must free memory based on the type of report
	switch(dl_report->csi_report[j]->report_case) {
	case PROTOCOL__PRP_DL_CSI__REPORT_P10CSI:
	  free(dl_report->csi_report[j]->p10csi);
	  break;
	case PROTOCOL__PRP_DL_CSI__REPORT_P11CSI:
	  free(dl_report->csi_report[j]->p11csi->wb_cqi);
	  free(dl_report->csi_report[j]->p11csi);
	  break;
	case PROTOCOL__PRP_DL_CSI__REPORT_P20CSI:
	  free(dl_report->csi_report[j]->p20csi);
	  break;
	case PROTOCOL__PRP_DL_CSI__REPORT_P21CSI:
	  free(dl_report->csi_report[j]->p21csi->wb_cqi);
	  free(dl_report->csi_report[j]->p21csi->sb_cqi);
	  free(dl_report->csi_report[j]->p21csi);
	  break;
	case PROTOCOL__PRP_DL_CSI__REPORT_A12CSI:
	  free(dl_report->csi_report[j]->a12csi->wb_cqi);
	  free(dl_report->csi_report[j]->a12csi->sb_pmi);
	  free(dl_report->csi_report[j]->a12csi);
	  break;
	case PROTOCOL__PRP_DL_CSI__REPORT_A22CSI:
	  free(dl_report->csi_report[j]->a22csi->wb_cqi);
	  free(dl_report->csi_report[j]->a22csi->sb_cqi);
	  free(dl_report->csi_report[j]->a22csi->sb_list);
	  free(dl_report->csi_report[j]->a22csi);
	  break;
	case PROTOCOL__PRP_DL_CSI__REPORT_A20CSI:
	  free(dl_report->csi_report[j]->a20csi->sb_list);
	  free(dl_report->csi_report[j]->a20csi);
	  break;
	case PROTOCOL__PRP_DL_CSI__REPORT_A30CSI:
	  free(dl_report->csi_report[j]->a30csi->sb_cqi);
	  free(dl_report->csi_report[j]->a30csi);
	  break;
	case PROTOCOL__PRP_DL_CSI__REPORT_A31CSI:
	  free(dl_report->csi_report[j]->a31csi->wb_cqi);
	  for (k = 0; k < dl_report->csi_report[j]->a31csi->n_sb_cqi; k++) {
	    free(dl_report->csi_report[j]->a31csi->sb_cqi[k]);
	  }
	  free(dl_report->csi_report[j]->a31csi->sb_cqi);
	  break;
	}  
	
	free(dl_report->csi_report[j]);
      }
      free(dl_report->csi_report);
      free(dl_report);
    }
    // If Paging buffer report flag was set
    if (reply->ue_report[i]->flags & PROTOCOL__PRP_UE_STATS_TYPE__PRUST_PBS) {
      paging_report = reply->ue_report[i]->pbr;
      // Delete all paging buffer reports
      for (j = 0; j < paging_report->n_paging_info; j++) {
	free(paging_report->paging_info[j]);
      }
      free(paging_report->paging_info);
      free(paging_report);
    }
    // If UL CQI report flag was set
    if (reply->ue_report[i]->flags & PROTOCOL__PRP_UE_STATS_TYPE__PRUST_UL_CQI) {
      ul_report = reply->ue_report[i]->ul_cqi_report;
      for (j = 0; j < ul_report->n_cqi_meas; j++) {
	free(ul_report->cqi_meas[j]->sinr);
	free(ul_report->cqi_meas[j]);
      }
      free(ul_report->cqi_meas);
    }
    free(reply->ue_report[i]);
  }
  free(reply->ue_report);

  // Free memory for all Cell reports
  for (i = 0; i < reply->n_cell_report; i++) {
    free(reply->cell_report[i]->noise_inter_report);
    free(reply->cell_report[i]);
  }
  free(reply->cell_report);
  
  free(reply);
  free(msg);
  return 0;
  
 error:
  //LOG_E(MAC, "%s: an error occured\n", __FUNCTION__);
  return -1;
}

int enb_agent_mac_sr_info(mid_t mod_id, const void *params, Protocol__ProgranMessage **msg) {
  Protocol__PrpHeader *header;
  int i;
  const int xid = *((int *)params);
  if (prp_create_header(xid, PROTOCOL__PRP_TYPE__PRPT_UL_SR_INFO, &header) != 0)
    goto error;

  Protocol__PrpUlSrInfo *ul_sr_info_msg;
  ul_sr_info_msg = malloc(sizeof(Protocol__PrpUlSrInfo));
  if (ul_sr_info_msg == NULL) {
    goto error;
  }
  protocol__prp_ul_sr_info__init(ul_sr_info_msg);
  
  ul_sr_info_msg->header = header;
  ul_sr_info_msg->has_sfn_sf = 1;
  ul_sr_info_msg->sfn_sf = get_sfn_sf(mod_id);
  /*TODO: Set the number of UEs that sent an SR */
  ul_sr_info_msg->n_rnti = 1;
  ul_sr_info_msg->rnti = (uint32_t *) malloc(ul_sr_info_msg->n_rnti * sizeof(uint32_t));

  if(ul_sr_info_msg->rnti == NULL) {
    goto error;
  }
  /*TODO:Set the rnti of the UEs that sent an SR */
  for (i = 0; i < ul_sr_info_msg->n_rnti; i++) {
    ul_sr_info_msg->rnti[i] = 1;
  }
    
  *msg = malloc(sizeof(Protocol__ProgranMessage));
  if(*msg == NULL)
    goto error;
  protocol__progran_message__init(*msg);
  (*msg)->msg_case = PROTOCOL__PROGRAN_MESSAGE__MSG_UL_SR_INFO_MSG;
  (*msg)->msg_dir =  PROTOCOL__PROGRAN_DIRECTION__INITIATING_MESSAGE;
  (*msg)->ul_sr_info_msg = ul_sr_info_msg;
  return 0;
  
 error:
  // TODO: Need to make proper error handling
  if (header != NULL)
    free(header);
  if (ul_sr_info_msg != NULL) {
    free(ul_sr_info_msg->rnti);
    free(ul_sr_info_msg);
  }
  if(*msg != NULL)
    free(*msg);
  //LOG_E(MAC, "%s: an error occured\n", __FUNCTION__);
  return -1;
}

int enb_agent_mac_destroy_sr_info(Protocol__ProgranMessage *msg) {
   if(msg->msg_case != PROTOCOL__PROGRAN_MESSAGE__MSG_UL_SR_INFO_MSG)
     goto error;

   free(msg->ul_sr_info_msg->header);
   free(msg->ul_sr_info_msg->rnti);
   free(msg->ul_sr_info_msg);
   free(msg);
   return 0;

 error:
   //LOG_E(MAC, "%s: an error occured\n", __FUNCTION__);
   return -1;
}

int enb_agent_mac_sf_trigger(mid_t mod_id, const void *params, Protocol__ProgranMessage **msg) {
  Protocol__PrpHeader *header;
  int i,j;
  const int xid = *((int *)params);
  if (prp_create_header(xid, PROTOCOL__PRP_TYPE__PRPT_SF_TRIGGER, &header) != 0)
    goto error;

  Protocol__PrpSfTrigger *sf_trigger_msg;
  sf_trigger_msg = malloc(sizeof(Protocol__PrpSfTrigger));
  if (sf_trigger_msg == NULL) {
    goto error;
  }
  protocol__prp_sf_trigger__init(sf_trigger_msg);
  
  sf_trigger_msg->header = header;
  sf_trigger_msg->has_sfn_sf = 1;
  sf_trigger_msg->sfn_sf = get_sfn_sf(mod_id);

  /*TODO: Fill in the number of dl HARQ related info, based on the number of currently
   *transmitting UEs
   */
  sf_trigger_msg->n_dl_info = get_num_ues(mod_id);
  
  Protocol__PrpDlInfo **dl_info = NULL;

  if (sf_trigger_msg->n_dl_info > 0) {
    dl_info = malloc(sizeof(Protocol__PrpDlInfo *) * sf_trigger_msg->n_dl_info);
    if(dl_info == NULL)
      goto error;
    //Fill the status of the current HARQ process for each UE
    for(i = 0; i++; i < sf_trigger_msg->n_dl_info) {
      dl_info[i] = malloc(sizeof(Protocol__PrpDlInfo));
      if(dl_info[i] == NULL)
	goto error;
      protocol__prp_dl_info__init(dl_info[i]);
      dl_info[i]->rnti = get_ue_crnti(mod_id, i);
      dl_info[i]->has_rnti = 1;
      /*TODO: fill in the right id of this round's HARQ process for this UE*/
      dl_info[i]->harq_process_id = 1;
      dl_info[i]->has_harq_process_id = 1;
      /*TODO: fill in the status of the HARQ process (2 TBs)*/
      dl_info[i]->n_harq_status = 2;
      dl_info[i]->harq_status = malloc(sizeof(uint32_t) * dl_info[i]->n_harq_status);
      for (j = 0; j < dl_info[j]->n_harq_status; j++) {
	dl_info[i]->harq_status[j] = PROTOCOL__PRP_HARQ_STATUS__PRHS_ACK;
      }
      /*TODO: fill in the serving cell index for this UE */
      dl_info[i]->serv_cell_index = 0;
      dl_info[i]->has_serv_cell_index = 1;
    }
  }
  
  sf_trigger_msg->dl_info = dl_info;

    /*TODO: Fill in the number of UL reception status related info, based on the number of currently
   *transmitting UEs
   */
  sf_trigger_msg->n_ul_info = get_num_ues(mod_id);
  
  Protocol__PrpUlInfo **ul_info = NULL;

  if (sf_trigger_msg->n_ul_info > 0) {
    ul_info = malloc(sizeof(Protocol__PrpUlInfo *) * sf_trigger_msg->n_ul_info);
    if(ul_info == NULL)
      goto error;
    //Fill the reception info for each transmitting UE
    for(i = 0; i++; i < sf_trigger_msg->n_ul_info) {
      ul_info[i] = malloc(sizeof(Protocol__PrpUlInfo));
      if(ul_info[i] == NULL)
	goto error;
      protocol__prp_ul_info__init(ul_info[i]);
      ul_info[i]->rnti = get_ue_crnti(mod_id, i);
      ul_info[i]->has_rnti = 1;
      /*TODO: fill in the Tx power control command for this UE (if available)*/
      ul_info[i]->tpc = 1;
      ul_info[i]->has_tpc = 0;
      /*TODO: fill in the amount of data in bytes in the MAC SDU received in this subframe for the 
	given logical channel*/
      ul_info[i]->n_ul_reception = 11;
      ul_info[i]->ul_reception = malloc(sizeof(uint32_t) * ul_info[i]->n_ul_reception);
      for (j = 0; j < ul_info[j]->n_ul_reception; j++) {
	ul_info[i]->ul_reception[j] = 100;
      }
      /*TODO: Fill in the reception status for each UEs data*/
      ul_info[i]->reception_status = PROTOCOL__PRP_RECEPTION_STATUS__PRRS_OK;
      ul_info[i]->has_reception_status = 1;
      /*TODO: fill in the serving cell index for this UE */
      ul_info[i]->serv_cell_index = 0;
      ul_info[i]->has_serv_cell_index = 1;
    }
  }
  
  sf_trigger_msg->ul_info = ul_info;

  *msg = malloc(sizeof(Protocol__ProgranMessage));
  if(*msg == NULL)
    goto error;
  protocol__progran_message__init(*msg);
  (*msg)->msg_case = PROTOCOL__PROGRAN_MESSAGE__MSG_SF_TRIGGER_MSG;
  (*msg)->msg_dir =  PROTOCOL__PROGRAN_DIRECTION__INITIATING_MESSAGE;
  (*msg)->sf_trigger_msg = sf_trigger_msg;
  return 0;
  
 error:
  if (header != NULL)
    free(header);
  if (sf_trigger_msg != NULL) {
    for (i = 0; i < sf_trigger_msg->n_dl_info; i++) {
      free(sf_trigger_msg->dl_info[i]->harq_status);
    }
    free(sf_trigger_msg->dl_info);
    for (i = 0; i < sf_trigger_msg->n_ul_info; i++) {
      free(sf_trigger_msg->ul_info[i]->reception_status);
    }
    free(sf_trigger_msg->ul_info);
    free(sf_trigger_msg);
  }
  if(*msg != NULL)
    free(*msg);
  //LOG_E(MAC, "%s: an error occured\n", __FUNCTION__);
  return -1;
}

int enb_agent_mac_destroy_sf_trigger(Protocol__ProgranMessage *msg) {
  int i;
  if(msg->msg_case != PROTOCOL__PROGRAN_MESSAGE__MSG_SF_TRIGGER_MSG)
    goto error;
  
  free(msg->sf_trigger_msg->header);
  for (i = 0; i < msg->sf_trigger_msg->n_dl_info; i++) {
    free(msg->sf_trigger_msg->dl_info[i]->harq_status);
  }
  free(msg->sf_trigger_msg->dl_info);
  for (i = 0; i < msg->sf_trigger_msg->n_ul_info; i++) {
    free(msg->sf_trigger_msg->ul_info[i]->reception_status);
  }
  free(msg->sf_trigger_msg->ul_info);
  free(msg->sf_trigger_msg);
  free(msg);
  
  return 0;

 error:
  //LOG_E(MAC, "%s: an error occured\n", __FUNCTION__);
  return -1;
}

int enb_agent_mac_create_empty_dl_config(mid_t mod_id, Protocol__ProgranMessage **msg) {

  int xid = 0;
  Protocol__PrpHeader *header;
  if (prp_create_header(xid, PROTOCOL__PRP_TYPE__PRPT_DL_MAC_CONFIG, &header) != 0)
    goto error;

  Protocol__PrpDlMacConfig *dl_mac_config_msg;
  dl_mac_config_msg = malloc(sizeof(Protocol__PrpDlMacConfig));
  if (dl_mac_config_msg == NULL) {
    goto error;
  }
  protocol__prp_dl_mac_config__init(dl_mac_config_msg);
  
  dl_mac_config_msg->header = header;
  dl_mac_config_msg->has_sfn_sf = 1;
  dl_mac_config_msg->sfn_sf = get_sfn_sf(mod_id);
  
  *msg = malloc(sizeof(Protocol__ProgranMessage));
  if(*msg == NULL)
    goto error;
  protocol__progran_message__init(*msg);
  (*msg)->msg_case = PROTOCOL__PROGRAN_MESSAGE__MSG_DL_MAC_CONFIG_MSG;
  (*msg)->msg_dir =  PROTOCOL__PROGRAN_DIRECTION__INITIATING_MESSAGE;
  (*msg)->dl_mac_config_msg = dl_mac_config_msg;

  return 0;

 error:
  return -1;
}

int enb_agent_mac_destroy_dl_config(Protocol__ProgranMessage *msg) {
  //TODO: De-allocate the memory of the message
  return -1;
}

/***********************************************
 * eNB agent - technology mac API implementation
 ***********************************************/

void enb_agent_send_sr_info(mid_t mod_id) {
  int size;
  Protocol__ProgranMessage *msg;
  void *data;
  int priority;
  err_code_t err_code;

  int xid = 0;

  /*TODO: Must use a proper xid*/
  err_code = enb_agent_mac_sr_info(mod_id, (void *) &xid, &msg);
  if (err_code < 0) {
    goto error;
  }

  if (msg != NULL){
    data=enb_agent_pack_message(msg, &size);
    /*Send sr info using the MAC channel of the eNB*/
    if (enb_agent_msg_send(mod_id, ENB_AGENT_MAC, data, size, priority)) {
      err_code = PROTOCOL__PROGRAN_ERR__MSG_ENQUEUING;
      goto error;
    }

    LOG_D(ENB_AGENT,"sent message with size %d\n", size);
    return;
  }
 error:
  LOG_D(ENB_AGENT, "Could not send sr message\n");
}

void enb_agent_send_sf_trigger(mid_t mod_id) {
  int size;
  Protocol__ProgranMessage *msg;
  void *data;
  int priority;
  err_code_t err_code;

  int xid = 0;
  
  /*TODO: Must use a proper xid*/
  err_code = enb_agent_mac_sf_trigger(mod_id, (void *) &xid, &msg);
  if (err_code < 0) {
    goto error;
  }

  if (msg != NULL){
    data=enb_agent_pack_message(msg, &size);
    /*Send sr info using the MAC channel of the eNB*/
    if (enb_agent_msg_send(mod_id, ENB_AGENT_MAC, data, size, priority)) {
      err_code = PROTOCOL__PROGRAN_ERR__MSG_ENQUEUING;
      goto error;
    }

    LOG_D(ENB_AGENT,"sent message with size %d\n", size);
    return;
  }
 error:
  LOG_D(ENB_AGENT, "Could not send sf trigger message\n");
}

void enb_agent_send_update_mac_stats(mid_t mod_id) {

  Protocol__ProgranMessage *current_report, *msg;
  void *data;
  int size;
  err_code_t err_code;
  int priority;
  
  mac_stats_updates_context_t stats_context = mac_stats_context[mod_id];

  if (pthread_mutex_lock(mac_stats_context[mod_id].mutex)) {
    goto error;
  }
  
  /*Create a fresh report with the required flags*/
  err_code = enb_agent_mac_handle_stats(mod_id, (void *) mac_stats_context[mod_id].stats_req, &current_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 (mac_stats_context[mod_id].prev_stats_reply != NULL) {

    msg = enb_agent_generate_diff_mac_stats_report(current_report, mac_stats_context[mod_id].prev_stats_reply);

    /*Destroy the old stats*/
     enb_agent_destroy_progran_message(mac_stats_context[mod_id].prev_stats_reply);
  }
  /*Use the current report for future comparissons*/
  mac_stats_context[mod_id].prev_stats_reply = current_report;
  
  
  if (pthread_mutex_unlock(mac_stats_context[mod_id].mutex)) {
    goto error;
  }
  
  if (msg != NULL){
    data=enb_agent_pack_message(msg, &size);
    /*Send any stats updates using the MAC channel of the eNB*/
    if (enb_agent_msg_send(mod_id, ENB_AGENT_MAC, data, size, priority)) {
      err_code = PROTOCOL__PROGRAN_ERR__MSG_ENQUEUING;
      goto error;
    }

    LOG_D(ENB_AGENT,"sent message with size %d\n", size);
    return;
  }
 error:
  LOG_D(ENB_AGENT, "Could not send sf trigger message\n");
}

int enb_agent_register_mac_xface(mid_t mod_id, AGENT_MAC_xface *xface) {
  if (mac_agent_registered[mod_id]) {
    LOG_E(MAC, "MAC agent for eNB %d is already registered\n", mod_id);
    return -1;
  }

  //xface->agent_ctxt = &shared_ctxt[mod_id];
  xface->enb_agent_send_sr_info = enb_agent_send_sr_info;
  xface->enb_agent_send_sf_trigger = enb_agent_send_sf_trigger;
  xface->enb_agent_send_update_mac_stats = enb_agent_send_update_mac_stats;

  
  mac_agent_registered[mod_id] = 1;
  agent_mac_xface[mod_id] = xface;

  return 0;
}

int enb_agent_unregister_mac_xface(mid_t mod_id, AGENT_MAC_xface *xface) {
  
  //xface->agent_ctxt = NULL;
  xface->enb_agent_send_sr_info = NULL;
  xface->enb_agent_send_sf_trigger = NULL;
  xface->enb_agent_send_update_mac_stats = NULL;

  mac_agent_registered[mod_id] = 0;
  agent_mac_xface[mod_id] = NULL;
  
  return 0;
}


/******************************************************
 *Implementations of enb_agent_mac_internal.h functions
 ******************************************************/

err_code_t enb_agent_init_cont_mac_stats_update(mid_t mod_id) {
  
  /*Initialize the Mac stats update structure*/
  /*Initially the continuous update is set to false*/
  mac_stats_context[mod_id].cont_update = 0;
  mac_stats_context[mod_id].is_initialized = 1;
  mac_stats_context[mod_id].stats_req = NULL;
  mac_stats_context[mod_id].prev_stats_reply = NULL;
  mac_stats_context[mod_id].mutex = calloc(1, sizeof(pthread_mutex_t));
  if (mac_stats_context[mod_id].mutex == NULL)
    goto error;
  if (pthread_mutex_init(mac_stats_context[mod_id].mutex, NULL))
    goto error;;
  
  return 0;
  
 error:
  return -1;
}

err_code_t enb_agent_destroy_cont_mac_stats_update(mid_t mod_id) {
  /*Disable the continuous updates for the MAC*/
  mac_stats_context[mod_id].cont_update = 0;
  mac_stats_context[mod_id].is_initialized = 0;
  enb_agent_destroy_progran_message(mac_stats_context[mod_id].stats_req);
  enb_agent_destroy_progran_message(mac_stats_context[mod_id].prev_stats_reply);
  free(mac_stats_context[mod_id].mutex);
  
  mac_agent_registered[mod_id] = NULL;
  return 1;
}


err_code_t enb_agent_enable_cont_mac_stats_update(mid_t mod_id,
						  xid_t xid, stats_request_config_t *stats_req) {
  /*Enable the continuous updates for the MAC*/
  if (pthread_mutex_lock(mac_stats_context[mod_id].mutex)) {
    goto error;
  }

  Protocol__ProgranMessage *req_msg;

  enb_agent_mac_stats_request(mod_id, xid, stats_req, &req_msg);
  mac_stats_context[mod_id].stats_req = req_msg;
  mac_stats_context[mod_id].prev_stats_reply = NULL;
  
  mac_stats_context[mod_id].cont_update = 1;
  mac_stats_context[mod_id].xid = xid;
  
  if (pthread_mutex_unlock(mac_stats_context[mod_id].mutex)) {
    goto error;
  }
  return 0;
  
 error:
  LOG_E(ENB_AGENT, "mac_stats_context for eNB %d is not initialized\n", mod_id);
  return -1;
}

err_code_t enb_agent_disable_cont_mac_stats_update(mid_t mod_id) {
  /*Disable the continuous updates for the MAC*/
  if (pthread_mutex_lock(mac_stats_context[mod_id].mutex)) {
    goto error;
  }
  mac_stats_context[mod_id].cont_update = 0;
  mac_stats_context[mod_id].xid = 0;
  if (mac_stats_context[mod_id].stats_req != NULL) {
    enb_agent_destroy_progran_message(mac_stats_context[mod_id].stats_req);
  }
  if (mac_stats_context[mod_id].prev_stats_reply != NULL) {
    enb_agent_destroy_progran_message(mac_stats_context[mod_id].prev_stats_reply);
  }
  if (pthread_mutex_unlock(mac_stats_context[mod_id].mutex)) {
    goto error;
  }
  return 0;

 error:
  LOG_E(ENB_AGENT, "mac_stats_context for eNB %d is not initialized\n", mod_id);
  return -1;
  
}