X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?p=sim%2Fe2-interface.git;a=blobdiff_plain;f=e2sim%2Fe2apv1sim%2Fe2sim%2Fsrc%2FE2AP%2Fe2ap_message_handler.cpp;fp=e2sim%2Fe2apv1sim%2Fe2sim%2Fsrc%2FE2AP%2Fe2ap_message_handler.cpp;h=45d31d06f4cf48a477a0f873a007dd247cd9863c;hp=0000000000000000000000000000000000000000;hb=3ebf932d23dcbec9ed19f4a51f9d00a0a54f5124;hpb=6896318f2b4ff01b4a88b16019c3dc93b0b693f5 diff --git a/e2sim/e2apv1sim/e2sim/src/E2AP/e2ap_message_handler.cpp b/e2sim/e2apv1sim/e2sim/src/E2AP/e2ap_message_handler.cpp new file mode 100644 index 0000000..45d31d0 --- /dev/null +++ b/e2sim/e2apv1sim/e2sim/src/E2AP/e2ap_message_handler.cpp @@ -0,0 +1,295 @@ + + +/***************************************************************************** +# * +# Copyright 2019 AT&T Intellectual Property * +# Copyright 2019 Nokia * +# * +# Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 * +# * +# 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. * +# * +******************************************************************************/ +#include "e2ap_message_handler.hpp" + +//#include +//#include + +#include "encode_e2apv1.hpp" +#include "kpm_callbacks.hpp" + +#include + +void e2ap_handle_sctp_data(int &socket_fd, sctp_buffer_t &data, bool xmlenc, E2Sim *e2sim) +{ + fprintf(stderr, "in e2ap_handle_sctp_data()\n"); + //decode the data into E2AP-PDU + E2AP_PDU_t* pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU)); + ASN_STRUCT_RESET(asn_DEF_E2AP_PDU, pdu); + + fprintf(stderr, "decoding...\n"); + + asn_transfer_syntax syntax; + + + syntax = ATS_ALIGNED_BASIC_PER; + + + fprintf(stderr, "full buffer\n%s\n", data.buffer); + // e2ap_asn1c_decode_pdu(pdu, data.buffer, data.len); + + auto rval = asn_decode(nullptr, syntax, &asn_DEF_E2AP_PDU, (void **) &pdu, + data.buffer, data.len); + + + int index = (int)pdu->present; + fprintf(stderr, "length of data %d\n", rval.consumed); + fprintf(stderr, "result %d\n", rval.code); + fprintf(stderr, "index is %d\n", index); + + fprintf(stderr, "showing xer of data\n"); + + xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu); + + int procedureCode = e2ap_asn1c_get_procedureCode(pdu); + index = (int)pdu->present; + + LOG_D("[E2AP] Unpacked E2AP-PDU: index = %d, procedureCode = %d\n", + index, procedureCode); + + switch(procedureCode) + { + + case ProcedureCode_id_E2setup: + switch(index) + { + case E2AP_PDU_PR_initiatingMessage: + e2ap_handle_E2SetupRequest(pdu, socket_fd); + LOG_I("[E2AP] Received SETUP-REQUEST"); + break; + + case E2AP_PDU_PR_successfulOutcome: + LOG_I("[E2AP] Received SETUP-RESPONSE-SUCCESS"); + break; + + case E2AP_PDU_PR_unsuccessfulOutcome: + LOG_I("[E2AP] Received SETUP-RESPONSE-FAILURE"); + break; + + default: + LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index); + break; + } + break; + + case ProcedureCode_id_Reset: //reset = 7 + switch(index) + { + case E2AP_PDU_PR_initiatingMessage: + LOG_I("[E2AP] Received RESET-REQUEST"); + break; + + case E2AP_PDU_PR_successfulOutcome: + break; + + case E2AP_PDU_PR_unsuccessfulOutcome: + break; + + default: + LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index); + break; + } + break; + + case ProcedureCode_id_RICsubscription: //RIC SUBSCRIPTION = 201 + switch(index) + { + case E2AP_PDU_PR_initiatingMessage: { //initiatingMessage + LOG_I("[E2AP] Received RIC-SUBSCRIPTION-REQUEST"); + // e2ap_handle_RICSubscriptionRequest(pdu, socket_fd); + long func_id = get_function_id_from_subscription(pdu); + SubscriptionCallback cb = e2sim->get_subscription_callback(func_id); + cb(pdu); + // callback_kpm_subscription_request(pdu, socket_fd); + + } + break; + + case E2AP_PDU_PR_successfulOutcome: + LOG_I("[E2AP] Received RIC-SUBSCRIPTION-RESPONSE"); + break; + + case E2AP_PDU_PR_unsuccessfulOutcome: + LOG_I("[E2AP] Received RIC-SUBSCRIPTION-FAILURE"); + break; + + default: + LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index); + break; + } + break; + + case ProcedureCode_id_RICindication: // 205 + switch(index) + { + case E2AP_PDU_PR_initiatingMessage: //initiatingMessage + LOG_I("[E2AP] Received RIC-INDICATION-REQUEST"); + // e2ap_handle_RICSubscriptionRequest(pdu, socket_fd); + break; + case E2AP_PDU_PR_successfulOutcome: + LOG_I("[E2AP] Received RIC-INDICATION-RESPONSE"); + break; + + case E2AP_PDU_PR_unsuccessfulOutcome: + LOG_I("[E2AP] Received RIC-INDICATION-FAILURE"); + break; + + default: + LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index, + (int)ProcedureCode_id_RICindication); + break; + } + break; + + default: + + LOG_E("[E2AP] No available handler for procedureCode=%d", procedureCode); + + break; + } +} + +void e2ap_handle_E2SetupRequest(E2AP_PDU_t* pdu, int &socket_fd) { + + + E2AP_PDU_t* res_pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU)); + generate_e2apv1_setup_response(res_pdu); + + + LOG_D("[E2AP] Created E2-SETUP-RESPONSE"); + + e2ap_asn1c_print_pdu(res_pdu); + + + auto buffer_size = MAX_SCTP_BUFFER; + unsigned char buffer[MAX_SCTP_BUFFER]; + + sctp_buffer_t data; + auto er = asn_encode_to_buffer(nullptr, ATS_BASIC_XER, &asn_DEF_E2AP_PDU, res_pdu, buffer, buffer_size); + + data.len = er.encoded; + fprintf(stderr, "er encoded is %d\n", er.encoded); + + //data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf); + memcpy(data.buffer, buffer, er.encoded); + + //send response data over sctp + if(sctp_send_data(socket_fd, data) > 0) { + LOG_I("[SCTP] Sent E2-SETUP-RESPONSE"); + } else { + LOG_E("[SCTP] Unable to send E2-SETUP-RESPONSE to peer"); + } + + sleep(5); + + //Sending Subscription Request + + E2AP_PDU_t* pdu_sub = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU)); + + generate_e2apv1_subscription_request(pdu_sub); + + xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_sub); + + auto buffer_size2 = MAX_SCTP_BUFFER; + unsigned char buffer2[MAX_SCTP_BUFFER]; + + sctp_buffer_t data2; + + auto er2 = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_sub, buffer2, buffer_size2); + + data2.len = er2.encoded; + memcpy(data2.buffer, buffer2, er2.encoded); + + fprintf(stderr, "er encded is %d\n", er2.encoded); + + if(sctp_send_data(socket_fd, data2) > 0) { + LOG_I("[SCTP] Sent E2-SUBSCRIPTION-REQUEST"); + } else { + LOG_E("[SCTP] Unable to send E2-SUBSCRIPTION-REQUEST to peer"); + } + + +} + + +void e2ap_handle_RICSubscriptionRequest(E2AP_PDU_t* pdu, int &socket_fd) +{ + + //Send back Subscription Success Response + + E2AP_PDU_t* pdu_resp = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU)); + + generate_e2apv1_subscription_response(pdu_resp, pdu); + + fprintf(stderr, "Subscription Response\n"); + + xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_resp); + + auto buffer_size2 = MAX_SCTP_BUFFER; + unsigned char buffer2[MAX_SCTP_BUFFER]; + + sctp_buffer_t data2; + + auto er2 = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_resp, buffer2, buffer_size2); + data2.len = er2.encoded; + + fprintf(stderr, "er encded is %d\n", er2.encoded); + + memcpy(data2.buffer, buffer2, er2.encoded); + + if(sctp_send_data(socket_fd, data2) > 0) { + LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE"); + } else { + LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer"); + } + + + //Send back an Indication + + E2AP_PDU_t* pdu_ind = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU)); + + generate_e2apv1_indication_request(pdu_ind); + + xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_ind); + + auto buffer_size = MAX_SCTP_BUFFER; + unsigned char buffer[MAX_SCTP_BUFFER]; + + sctp_buffer_t data; + + auto er = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_ind, buffer, buffer_size); + data.len = er.encoded; + + fprintf(stderr, "er encded is %d\n", er.encoded); + + memcpy(data.buffer, buffer, er.encoded); + + if(sctp_send_data(socket_fd, data) > 0) { + LOG_I("[SCTP] Sent RIC-INDICATION-REQUEST"); + } else { + LOG_E("[SCTP] Unable to send RIC-INDICATION-REQUEST to peer"); + } + +} + + + +