mirror of https://github.com/PentHertz/srsLTE.git
add basic handling for deactivating eps bearer
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c14c3c23f1
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1c749ad559
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@ -3733,8 +3733,11 @@ typedef struct{
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bool protocol_cnfg_opts_present;
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}LIBLTE_MME_DEACTIVATE_EPS_BEARER_CONTEXT_ACCEPT_MSG_STRUCT;
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// Functions
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LIBLTE_ERROR_ENUM liblte_mme_pack_deactivate_eps_bearer_context_accept_msg(LIBLTE_MME_DEACTIVATE_EPS_BEARER_CONTEXT_ACCEPT_MSG_STRUCT *deact_eps_bearer_context_accept,
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LIBLTE_BYTE_MSG_STRUCT *msg);
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LIBLTE_ERROR_ENUM liblte_mme_pack_deactivate_eps_bearer_context_accept_msg(
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LIBLTE_MME_DEACTIVATE_EPS_BEARER_CONTEXT_ACCEPT_MSG_STRUCT* deact_eps_bearer_context_accept,
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uint8 sec_hdr_type,
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uint32 count,
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LIBLTE_BYTE_MSG_STRUCT* msg);
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LIBLTE_ERROR_ENUM liblte_mme_unpack_deactivate_eps_bearer_context_accept_msg(LIBLTE_BYTE_MSG_STRUCT *msg,
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LIBLTE_MME_DEACTIVATE_EPS_BEARER_CONTEXT_ACCEPT_MSG_STRUCT *deact_eps_bearer_context_accept);
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@ -9810,42 +9810,55 @@ LIBLTE_ERROR_ENUM liblte_mme_unpack_bearer_resource_modification_request_msg(LIB
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Document Reference: 24.301 v10.2.0 Section 8.3.11
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*********************************************************************/
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LIBLTE_ERROR_ENUM liblte_mme_pack_deactivate_eps_bearer_context_accept_msg(LIBLTE_MME_DEACTIVATE_EPS_BEARER_CONTEXT_ACCEPT_MSG_STRUCT *deact_eps_bearer_context_accept,
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LIBLTE_BYTE_MSG_STRUCT *msg)
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LIBLTE_ERROR_ENUM liblte_mme_pack_deactivate_eps_bearer_context_accept_msg(
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LIBLTE_MME_DEACTIVATE_EPS_BEARER_CONTEXT_ACCEPT_MSG_STRUCT* deact_eps_bearer_context_accept,
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uint8 sec_hdr_type,
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uint32 count,
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LIBLTE_BYTE_MSG_STRUCT* msg)
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{
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LIBLTE_ERROR_ENUM err = LIBLTE_ERROR_INVALID_INPUTS;
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uint8 *msg_ptr = msg->msg;
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LIBLTE_ERROR_ENUM err = LIBLTE_ERROR_INVALID_INPUTS;
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uint8* msg_ptr = msg->msg;
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if(deact_eps_bearer_context_accept != NULL &&
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msg != NULL)
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{
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// Protocol Discriminator and EPS Bearer ID
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*msg_ptr = (deact_eps_bearer_context_accept->eps_bearer_id << 4) | (LIBLTE_MME_PD_EPS_SESSION_MANAGEMENT);
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msg_ptr++;
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if (deact_eps_bearer_context_accept != NULL && msg != NULL) {
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if (LIBLTE_MME_SECURITY_HDR_TYPE_PLAIN_NAS != sec_hdr_type) {
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// Protocol Discriminator and Security Header Type
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*msg_ptr = (sec_hdr_type << 4) | (LIBLTE_MME_PD_EPS_MOBILITY_MANAGEMENT);
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msg_ptr++;
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// Procedure Transaction ID
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*msg_ptr = deact_eps_bearer_context_accept->proc_transaction_id;
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msg_ptr++;
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// MAC will be filled in later
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msg_ptr += 4;
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// Message Type
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*msg_ptr = LIBLTE_MME_MSG_TYPE_DEACTIVATE_EPS_BEARER_CONTEXT_ACCEPT;
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msg_ptr++;
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// Protocol Configuration Options
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if(deact_eps_bearer_context_accept->protocol_cnfg_opts_present)
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{
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*msg_ptr = LIBLTE_MME_PROTOCOL_CONFIGURATION_OPTIONS_IEI;
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msg_ptr++;
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liblte_mme_pack_protocol_config_options_ie(&deact_eps_bearer_context_accept->protocol_cnfg_opts, &msg_ptr);
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}
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// Fill in the number of bytes used
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msg->N_bytes = msg_ptr - msg->msg;
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err = LIBLTE_SUCCESS;
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// Sequence Number
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*msg_ptr = count & 0xFF;
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msg_ptr++;
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}
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return(err);
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// Protocol Discriminator and EPS Bearer ID
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*msg_ptr = (deact_eps_bearer_context_accept->eps_bearer_id << 4) | (LIBLTE_MME_PD_EPS_SESSION_MANAGEMENT);
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msg_ptr++;
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// Procedure Transaction ID
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*msg_ptr = deact_eps_bearer_context_accept->proc_transaction_id;
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msg_ptr++;
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// Message Type
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*msg_ptr = LIBLTE_MME_MSG_TYPE_DEACTIVATE_EPS_BEARER_CONTEXT_ACCEPT;
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msg_ptr++;
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// Protocol Configuration Options
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if (deact_eps_bearer_context_accept->protocol_cnfg_opts_present) {
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*msg_ptr = LIBLTE_MME_PROTOCOL_CONFIGURATION_OPTIONS_IEI;
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msg_ptr++;
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liblte_mme_pack_protocol_config_options_ie(&deact_eps_bearer_context_accept->protocol_cnfg_opts, &msg_ptr);
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}
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// Fill in the number of bytes used
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msg->N_bytes = msg_ptr - msg->msg;
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err = LIBLTE_SUCCESS;
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}
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return (err);
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}
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LIBLTE_ERROR_ENUM liblte_mme_unpack_deactivate_eps_bearer_context_accept_msg(LIBLTE_BYTE_MSG_STRUCT *msg,
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LIBLTE_MME_DEACTIVATE_EPS_BEARER_CONTEXT_ACCEPT_MSG_STRUCT *deact_eps_bearer_context_accept)
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@ -183,6 +183,7 @@ private:
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void parse_detach_request(uint32_t lcid, srslte::unique_byte_buffer_t pdu);
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void parse_emm_status(uint32_t lcid, srslte::unique_byte_buffer_t pdu);
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void parse_activate_dedicated_eps_bearer_context_request(uint32_t lcid, srslte::unique_byte_buffer_t pdu);
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void parse_deactivate_eps_bearer_context_request(srslte::unique_byte_buffer_t pdu);
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void parse_activate_test_mode(uint32_t lcid, srslte::unique_byte_buffer_t pdu, const uint8_t sec_hdr_type);
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// Packet generators
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@ -202,6 +203,7 @@ private:
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void send_detach_accept();
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void send_activate_dedicated_eps_bearer_context_accept(const uint8_t& proc_transaction_id,
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const uint8_t& eps_bearer_id);
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void send_deactivate_eps_bearer_context_accept(const uint8_t& proc_transaction_id, const uint8_t& eps_bearer_id);
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void send_activate_test_mode_complete(const uint8_t sec_hdr_type);
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// security context persistence file
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@ -419,6 +419,9 @@ void nas::write_pdu(uint32_t lcid, unique_byte_buffer_t pdu)
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case LIBLTE_MME_MSG_TYPE_ACTIVATE_DEDICATED_EPS_BEARER_CONTEXT_REQUEST:
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parse_activate_dedicated_eps_bearer_context_request(lcid, std::move(pdu));
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break;
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case LIBLTE_MME_MSG_TYPE_DEACTIVATE_EPS_BEARER_CONTEXT_REQUEST:
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parse_deactivate_eps_bearer_context_request(std::move(pdu));
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break;
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case LIBLTE_MME_MSG_TYPE_ACTIVATE_TEST_MODE:
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parse_activate_test_mode(lcid, std::move(pdu), sec_hdr_type);
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break;
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@ -1115,6 +1118,24 @@ void nas::parse_activate_dedicated_eps_bearer_context_request(uint32_t lcid, uni
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send_activate_dedicated_eps_bearer_context_accept(request.proc_transaction_id, request.eps_bearer_id);
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}
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void nas::parse_deactivate_eps_bearer_context_request(unique_byte_buffer_t pdu)
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{
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LIBLTE_MME_DEACTIVATE_EPS_BEARER_CONTEXT_REQUEST_MSG_STRUCT request;
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liblte_mme_unpack_deactivate_eps_bearer_context_request_msg((LIBLTE_BYTE_MSG_STRUCT*)pdu.get(), &request);
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nas_log->info("Received Deactivate EPS bearer context request (eps_bearer_id=%d, proc_id=%d)\n",
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request.eps_bearer_id,
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request.proc_transaction_id);
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ctxt.rx_count++;
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// fixme: add proper checks before sending accepts
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send_deactivate_eps_bearer_context_accept(request.proc_transaction_id, request.eps_bearer_id);
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}
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void nas::parse_activate_test_mode(uint32_t lcid, unique_byte_buffer_t pdu, const uint8_t sec_hdr_type)
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{
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nas_log->info("Received Activate test mode\n");
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@ -1785,6 +1806,46 @@ void nas::send_activate_dedicated_eps_bearer_context_accept(const uint8_t& proc_
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ctxt.tx_count++;
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}
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void nas::send_deactivate_eps_bearer_context_accept(const uint8_t& proc_transaction_id, const uint8_t& eps_bearer_id)
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{
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unique_byte_buffer_t pdu = srslte::allocate_unique_buffer(*pool, true);
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LIBLTE_MME_DEACTIVATE_EPS_BEARER_CONTEXT_ACCEPT_MSG_STRUCT accept = {};
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accept.eps_bearer_id = eps_bearer_id;
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accept.proc_transaction_id = proc_transaction_id;
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if (liblte_mme_pack_deactivate_eps_bearer_context_accept_msg(&accept,
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LIBLTE_MME_SECURITY_HDR_TYPE_INTEGRITY_AND_CIPHERED,
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ctxt.tx_count,
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(LIBLTE_BYTE_MSG_STRUCT*)pdu.get())) {
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nas_log->error("Error packing Aeactivate EPS Bearer context accept.\n");
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return;
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}
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if (pcap != NULL) {
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pcap->write_nas(pdu->msg, pdu->N_bytes);
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}
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cipher_encrypt(pdu.get());
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if (pdu->N_bytes > 5) {
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integrity_generate(
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&k_nas_int[16], ctxt.tx_count, SECURITY_DIRECTION_UPLINK, &pdu->msg[5], pdu->N_bytes - 5, &pdu->msg[1]);
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} else {
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nas_log->error("Invalid PDU size %d\n", pdu->N_bytes);
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return;
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}
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nas_log->info_hex(pdu->msg,
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pdu->N_bytes,
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"Sending Deactivate EPS Bearer context accept (eps_bearer_id=%d, proc_id=%d)\n",
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accept.eps_bearer_id,
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accept.proc_transaction_id);
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rrc->write_sdu(std::move(pdu));
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ctxt.tx_count++;
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}
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void nas::send_activate_test_mode_complete(const uint8_t sec_hdr_type)
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{
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unique_byte_buffer_t pdu = srslte::allocate_unique_buffer(*pool, true);
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