simulators/e2sim/src/E2AP/e2ap_message_handler.cpp

   1 /*****************************************************************************\r
   2 #                                                                            *\r
   3 # Copyright 2019 AT&T Intellectual Property                                  *\r
   4 # Copyright 2019 Nokia                                                       *\r
   5 #                                                                            *\r
   6 # Licensed under the Apache License, Version 2.0 (the "License");            *\r
   7 # you may not use this file except in compliance with the License.           *\r
   8 # You may obtain a copy of the License at                                    *\r
   9 #                                                                            *\r
  10 #      http://www.apache.org/licenses/LICENSE-2.0                            *\r
  11 #                                                                            *\r
  12 # Unless required by applicable law or agreed to in writing, software        *\r
  13 # distributed under the License is distributed on an "AS IS" BASIS,          *\r
  14 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   *\r
  15 # See the License for the specific language governing permissions and        *\r
  16 # limitations under the License.                                             *\r
  17 #                                                                            *\r
  18 ******************************************************************************/\r
  19 #include "e2ap_message_handler.hpp"\r
  20 #include <unistd.h>\r
  21 \r
  22 void e2ap_handle_sctp_data(int &socket_fd, sctp_buffer_t &data)\r
  23 {\r
  24   //decode the data into E2AP-PDU\r
  25   E2AP_PDU_t* pdu = new E2AP_PDU_t();\r
  26 \r
  27   e2ap_asn1c_decode_pdu(pdu, data.buffer, data.len);\r
  28 \r
  29   e2ap_asn1c_print_pdu(pdu);\r
  30 \r
  31   int procedureCode = e2ap_asn1c_get_procedureCode(pdu);\r
  32   int index = (int)pdu->present;\r
  33 \r
  34   LOG_D("[E2AP] Unpacked E2AP-PDU: index = %d, procedureCode = %d\n",\r
  35                             index, procedureCode);\r
  36 \r
  37   switch(procedureCode)\r
  38   {\r
  39     case ProcedureCode_id_x2Setup: //X2Setup = 6\r
  40       switch(index)\r
  41       {\r
  42         case E2AP_PDU_PR_initiatingMessage: //initiatingMessage\r
  43           LOG_I("[E2AP] Received X2-SETUP-REQUEST");\r
  44           e2ap_handle_X2SetupRequest(pdu, socket_fd);\r
  45           break;\r
  46 \r
  47         case E2AP_PDU_PR_successfulOutcome: //successfulOutcome\r
  48           LOG_I("[E2AP] Received X2-SETUP-RESPONSE");\r
  49           break;\r
  50 \r
  51         case E2AP_PDU_PR_unsuccessfulOutcome:\r
  52           break;\r
  53 \r
  54         default:\r
  55           LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);\r
  56           break;\r
  57       }\r
  58       break;\r
  59 \r
  60     case ProcedureCode_id_endcX2Setup: //ENDCX2Setup = 36\r
  61       switch(index)\r
  62       {\r
  63         case E2AP_PDU_PR_initiatingMessage: //initiatingMessage\r
  64           LOG_I("[E2AP] Received ENDC-X2-SETUP-REQUEST");\r
  65           e2ap_handle_ENDCX2SetupRequest(pdu, socket_fd);\r
  66           break;\r
  67 \r
  68         case E2AP_PDU_PR_successfulOutcome: //successfulOutcome\r
  69           LOG_I("[E2AP] Received ENDC-X2-SETUP-RESPONSE");\r
  70           //no handler yet\r
  71           break;\r
  72 \r
  73         case E2AP_PDU_PR_unsuccessfulOutcome:\r
  74           LOG_I("[E2AP] Received ENDC-X2-SETUP-FAILURE");\r
  75           //no handler yet\r
  76           break;\r
  77 \r
  78         default:\r
  79           LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);\r
  80           break;\r
  81       }\r
  82       break;\r
  83 \r
  84     case ProcedureCode_id_reset: //reset = 7\r
  85       switch(index)\r
  86       {\r
  87         case E2AP_PDU_PR_initiatingMessage:\r
  88           LOG_I("[E2AP] Received RESET-REQUEST");\r
  89           break;\r
  90 \r
  91         case E2AP_PDU_PR_successfulOutcome:\r
  92           break;\r
  93 \r
  94         case E2AP_PDU_PR_unsuccessfulOutcome:\r
  95           break;\r
  96 \r
  97         default:\r
  98           LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);\r
  99           break;\r
 100       }\r
 101       break;\r
 102 \r
 103     case ProcedureCode_id_ricSubscription: //RIC SUBSCRIPTION = 201\r
 104       switch(index)\r
 105       {\r
 106         case E2AP_PDU_PR_initiatingMessage: //initiatingMessage\r
 107           LOG_I("[E2AP] Received RIC-SUBSCRIPTION-REQUEST");\r
 108           //e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);\r
 109           e2ap_handle_RICSubscriptionRequest_securityDemo(pdu, socket_fd);\r
 110           break;\r
 111 \r
 112         case E2AP_PDU_PR_successfulOutcome:\r
 113           LOG_I("[E2AP] Received RIC-SUBSCRIPTION-RESPONSE");\r
 114           break;\r
 115 \r
 116         case E2AP_PDU_PR_unsuccessfulOutcome:\r
 117           LOG_I("[E2AP] Received RIC-SUBSCRIPTION-FAILURE");\r
 118           break;\r
 119 \r
 120         default:\r
 121           LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);\r
 122           break;\r
 123       }\r
 124       break;\r
 125 \r
 126     case ProcedureCode_id_ricIndication: // 205\r
 127       switch(index)\r
 128       {\r
 129         case E2AP_PDU_PR_initiatingMessage: //initiatingMessage\r
 130           LOG_I("[E2AP] Received RIC-INDICATION");\r
 131           // e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);\r
 132           break;\r
 133 \r
 134         default:\r
 135           LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,\r
 136                                     (int)ProcedureCode_id_ricIndication);\r
 137           break;\r
 138       }\r
 139       break;\r
 140 \r
 141     default:\r
 142       LOG_E("[E2AP] No available handler for procedureCode=%d", procedureCode);\r
 143       break;\r
 144   }\r
 145 }\r
 146 \r
 147 /*\r
 148 Simply send back X2SetupResponse\r
 149 Todo: add more handling options (failure, duplicated request, etc.)\r
 150 */\r
 151 void e2ap_handle_X2SetupRequest(E2AP_PDU_t* pdu, int &socket_fd)\r
 152 {\r
 153   E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_X2SetupResponse.xml");\r
 154 \r
 155   LOG_D("[E2AP] Created X2-SETUP-RESPONSE");\r
 156 \r
 157   e2ap_asn1c_print_pdu(res_pdu);\r
 158 \r
 159   uint8_t       *buf;\r
 160   sctp_buffer_t data;\r
 161 \r
 162   data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);\r
 163   memcpy(data.buffer, buf, data.len);\r
 164 \r
 165   //send response data over sctp\r
 166   if(sctp_send_data(socket_fd, data) > 0) {\r
 167     LOG_I("[SCTP] Sent X2-SETUP-RESPONSE");\r
 168   } else {\r
 169     LOG_E("[SCTP] Unable to send X2-SETUP-RESPONSE to peer");\r
 170   }\r
 171 }\r
 172 \r
 173 /*\r
 174 Simply send back ENDCX2SetupResponse\r
 175 Todo: add more handling options (failure, duplicated request, etc.)\r
 176 */\r
 177 void e2ap_handle_ENDCX2SetupRequest(E2AP_PDU_t* pdu, int &socket_fd)\r
 178 {\r
 179   E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_ENDCX2SetupResponse.xml");\r
 180 \r
 181   LOG_D("[E2AP] Created ENDC-X2-SETUP-RESPONSE");\r
 182 \r
 183   e2ap_asn1c_print_pdu(res_pdu);\r
 184 \r
 185   uint8_t       *buf;\r
 186   sctp_buffer_t data;\r
 187 \r
 188   data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);\r
 189   memcpy(data.buffer, buf, data.len);\r
 190 \r
 191   //send response data over sctp\r
 192   if(sctp_send_data(socket_fd, data) > 0) {\r
 193     LOG_I("[SCTP] Sent ENDC-X2-SETUP-RESPONSE");\r
 194   } else {\r
 195     LOG_E("[SCTP] Unable to send ENDC-X2-SETUP-RESPONSE to peer");\r
 196   }\r
 197 }\r
 198 \r
 199 /*\r
 200 Simply send back hard-coded RICSubscriptionResponse\r
 201 Todo: add more handling options (failure, duplicated request, etc.)\r
 202 */\r
 203 void e2ap_handle_RICSubscriptionRequest(E2AP_PDU_t* pdu, int &socket_fd)\r
 204 {\r
 205   E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_RICsubscriptionResponse.xml");\r
 206 \r
 207   LOG_D("[E2AP] Created RIC-SUBSCRIPTION-RESPONSE");\r
 208 \r
 209   e2ap_asn1c_print_pdu(res_pdu);\r
 210 \r
 211   uint8_t       *buf;\r
 212   sctp_buffer_t data;\r
 213 \r
 214   data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);\r
 215   memcpy(data.buffer, buf, data.len);\r
 216 \r
 217   //send response data over sctp\r
 218   if(sctp_send_data(socket_fd, data) > 0) {\r
 219     LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");\r
 220   } else {\r
 221     LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");\r
 222   }\r
 223 }\r
 224 \r
 225 void e2ap_handle_RICSubscriptionRequest_securityDemo(E2AP_PDU_t* pdu, int &socket_fd)\r
 226 {\r
 227   E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_RICsubscriptionResponse.xml");\r
 228 \r
 229   LOG_D("[E2AP] Created RIC-SUBSCRIPTION-RESPONSE");\r
 230 \r
 231   e2ap_asn1c_print_pdu(res_pdu);\r
 232 \r
 233   uint8_t       *buf;\r
 234   sctp_buffer_t data;\r
 235 \r
 236   data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);\r
 237   memcpy(data.buffer, buf, data.len);\r
 238 \r
 239   //send response data over sctp\r
 240   if(sctp_send_data(socket_fd, data) > 0) {\r
 241     LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");\r
 242   } else {\r
 243     LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");\r
 244   }\r
 245 \r
 246   //Start sending RIC Indication\r
 247   int count1 = 0, count2 = 0;\r
 248 \r
 249   E2AP_PDU_t* indication_type1 = e2ap_xml_to_pdu("E2AP_RICindication_type1.xml");\r
 250   E2AP_PDU_t* indication_type2 = e2ap_xml_to_pdu("E2AP_RICindication_type2.xml");\r
 251 \r
 252   uint8_t *buf1, *buf2;\r
 253   sctp_buffer_t data1, data2;\r
 254   data1.len = e2ap_asn1c_encode_pdu(indication_type1, &buf1);\r
 255   memcpy(data1.buffer, buf1, data1.len);\r
 256 \r
 257   data2.len = e2ap_asn1c_encode_pdu(indication_type2, &buf2);\r
 258   memcpy(data2.buffer, buf2, data2.len);\r
 259 \r
 260   while(1){\r
 261     sleep(1);\r
 262     //type1\r
 263     if(sctp_send_data(socket_fd, data1) > 0) {\r
 264       count1++;\r
 265       LOG_I("[SCTP] Sent RIC-INDICATION SgNBAdditionRequest Type 1, count1 = %d", count1);\r
 266     } else {\r
 267       LOG_E("[SCTP] Unable to send RIC-INDICATION to peer");\r
 268     }\r
 269 \r
 270     sleep(1);\r
 271     //type2\r
 272     if(sctp_send_data(socket_fd, data2) > 0) {\r
 273       count2++;\r
 274       LOG_I("[SCTP] Sent RIC-INDICATION SgNBAdditionRequest Type 2, count2 = %d", count2);\r
 275     } else {\r
 276       LOG_E("[SCTP] Unable to send RIC-INDICATION to peer");\r
 277     }\r
 278   } //end while\r
 279 \r
 280 }\r
 281 \r
 282 // void e2ap_handle_RICSubscriptionRequest_old(e2ap_pdu_t* pdu, int &socket_fd)\r
 283 // {\r
 284 //   RICsubscription_params_t params;\r
 285 //   e2ap_parse_RICsubscriptionRequest(pdu, params);\r
 286 //\r
 287 //   /* Example handling logic\r
 288 //   - Accept if request id is even-numbered -> send back response\r
 289 //     in this case, accept every other actions\r
 290 //\r
 291 //   - Reject if request id is odd-numbered -> send back failure\r
 292 //   */\r
 293 //\r
 294 //   e2ap_pdu_t* res_pdu = new_e2ap_pdu();\r
 295 //   bool is_failure = false;\r
 296 //\r
 297 //   if(params.request_id % 2 == 0)\r
 298 //   {\r
 299 //     for(size_t i = 0; i < params.actionList.size(); i++)\r
 300 //     {\r
 301 //       if(i%2 == 0){\r
 302 //         params.actionList[i].isAdmitted = true;\r
 303 //       } else {\r
 304 //         params.actionList[i].isAdmitted = false;\r
 305 //         params.actionList[i].notAdmitted_cause = RICcause_radioNetwork;\r
 306 //         params.actionList[i].notAdmitted_subCause = 5;\r
 307 //       }\r
 308 //     }\r
 309 //\r
 310 //     e2ap_create_RICsubscriptionResponse(res_pdu, params);\r
 311 //     LOG_I("[E2AP] Created RIC-SUBSCRIPTION-RESPONSE");\r
 312 //   }\r
 313 //   else\r
 314 //   {\r
 315 //     is_failure = true;\r
 316 //\r
 317 //     for(size_t i = 0; i < params.actionList.size(); i++)\r
 318 //     {\r
 319 //       params.actionList[i].isAdmitted = false;\r
 320 //       params.actionList[i].notAdmitted_cause = RICcause_radioNetwork;\r
 321 //       params.actionList[i].notAdmitted_subCause = 5;\r
 322 //     }\r
 323 //\r
 324 //     e2ap_create_RICsubscriptionFailure(res_pdu, params);\r
 325 //     LOG_I("[E2AP] Created RIC-SUBSCRIPTION-FAILURE");\r
 326 //   }\r
 327 //\r
 328 //   e2ap_print_pdu(res_pdu);\r
 329 //\r
 330 //   //Encode into buffer\r
 331 //   sctp_buffer_t data;\r
 332 //   e2ap_encode_pdu(res_pdu, data.buffer, sizeof(data.buffer), data.len);\r
 333 //\r
 334 //   //send response data over sctp\r
 335 //   if(sctp_send_data(socket_fd, data) > 0)\r
 336 //   {\r
 337 //     if(is_failure) {\r
 338 //       LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-FAILURE");\r
 339 //     }\r
 340 //     else {\r
 341 //       LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");\r
 342 //     }\r
 343 //   }\r
 344 //   else\r
 345 //   {\r
 346 //     if(is_failure) {\r
 347 //       LOG_I("[SCTP] Unable to send RIC-SUBSCRIPTION-FAILURE");\r
 348 //     }\r
 349 //     else {\r
 350 //       LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE");\r
 351 //     }\r
 352 //   }\r
 353 //\r
 354 // }\r