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srsRAN_4G
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master
Pedro Alvarez 7 years ago
parent 57990ba60d
commit b14c6e85f4
1 changed files with 111 additions and 111 deletions
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222
srsepc/src/mme/s1ap_nas_transport.cc
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@ -729,6 +729,117 @@ s1ap_nas_transport::pack_esm_information_request(srslte::byte_buffer_t *reply_ms
return true;
}
bool
s1ap_nas_transport::pack_attach_accept(ue_ctx_t *ue_ctx, LIBLTE_S1AP_E_RABTOBESETUPITEMCTXTSUREQ_STRUCT *erab_ctxt, struct srslte::gtpc_pdn_address_allocation_ie *paa, srslte::byte_buffer_t *nas_buffer) {
LIBLTE_MME_ATTACH_ACCEPT_MSG_STRUCT attach_accept;
LIBLTE_MME_ACTIVATE_DEFAULT_EPS_BEARER_CONTEXT_REQUEST_MSG_STRUCT act_def_eps_bearer_context_req;
bzero(&act_def_eps_bearer_context_req,sizeof(LIBLTE_MME_ACTIVATE_DEFAULT_EPS_BEARER_CONTEXT_REQUEST_MSG_STRUCT));
m_s1ap_log->info("Packing Attach Accept\n");
//Attach accept
attach_accept.eps_attach_result = LIBLTE_MME_EPS_ATTACH_RESULT_EPS_ONLY;
//Mandatory
//FIXME: Set t3412 from config
attach_accept.t3412.unit = LIBLTE_MME_GPRS_TIMER_UNIT_1_MINUTE; // GPRS 1 minute unit
attach_accept.t3412.value = 30; // 30 minute periodic timer
//FIXME: Set tai_list from config
attach_accept.tai_list.N_tais = 1;
attach_accept.tai_list.tai[0].mcc = 1;
attach_accept.tai_list.tai[0].mnc = 1;
attach_accept.tai_list.tai[0].tac = 7;
//Allocate a GUTI ot the UE
attach_accept.guti_present=true;
attach_accept.guti.type_of_id = 6; //110 -> GUTI
attach_accept.guti.guti.mcc = 1;
attach_accept.guti.guti.mnc = 1;
attach_accept.guti.guti.mme_group_id = 0x0001;
attach_accept.guti.guti.mme_code = 0x1a;
attach_accept.guti.guti.m_tmsi = 0x124ae;
/*
typedef struct{
uint32 m_tmsi;
uint16 mcc;
uint16 mnc;
uint16 mme_group_id;
uint8 mme_code;
}LIBLTE_MME_EPS_MOBILE_ID_GUTI_STRUCT;
typedef struct{
LIBLTE_MME_EPS_MOBILE_ID_GUTI_STRUCT guti;
uint8 type_of_id;
uint8 imsi[15];
uint8 imei[15];
}LIBLTE_MME_EPS_MOBILE_ID_STRUCT;*/
//Make sure all unused options are set to false
attach_accept.lai_present=false;
attach_accept.ms_id_present=false;
attach_accept.emm_cause_present=false;
attach_accept.t3402_present=false;
attach_accept.t3423_present=false;
attach_accept.equivalent_plmns_present=false;
attach_accept.emerg_num_list_present=false;
attach_accept.eps_network_feature_support_present=false;
attach_accept.additional_update_result_present=false;
attach_accept.t3412_ext_present=false;
//Set activate default eps bearer (esm_ms)
//Set pdn_addr
act_def_eps_bearer_context_req.pdn_addr.pdn_type = LIBLTE_MME_PDN_TYPE_IPV4;
memcpy(act_def_eps_bearer_context_req.pdn_addr.addr, &paa->ipv4, 4);
//Set eps bearer id
act_def_eps_bearer_context_req.eps_bearer_id = erab_ctxt->e_RAB_ID.E_RAB_ID;
printf("%d\n",act_def_eps_bearer_context_req.eps_bearer_id);
act_def_eps_bearer_context_req.transaction_id_present = false;
//set eps_qos
act_def_eps_bearer_context_req.eps_qos.qci = erab_ctxt->e_RABlevelQoSParameters.qCI.QCI;
act_def_eps_bearer_context_req.eps_qos.mbr_ul = 254; //FIXME
act_def_eps_bearer_context_req.eps_qos.mbr_dl = 254; //FIXME
act_def_eps_bearer_context_req.eps_qos.mbr_ul_ext = 250; //FIXME
act_def_eps_bearer_context_req.eps_qos.mbr_dl_ext = 250; //FIXME check
//set apn
//act_def_eps_bearer_context_req.apn
std::string apn("test123");
act_def_eps_bearer_context_req.apn.apn = apn; //FIXME
act_def_eps_bearer_context_req.proc_transaction_id = ue_ctx->procedure_transaction_id; //FIXME
//Set DNS server
act_def_eps_bearer_context_req.protocol_cnfg_opts_present = true;
act_def_eps_bearer_context_req.protocol_cnfg_opts.N_opts = 1;
act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].id = 0x0d;
act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].len = 4;
act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].contents[0] = 8;
act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].contents[1] = 8;
act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].contents[2] = 8;
act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].contents[3] = 8;
uint8_t sec_hdr_type =2;
ue_ctx->security_ctxt.dl_nas_count++;
liblte_mme_pack_activate_default_eps_bearer_context_request_msg(&act_def_eps_bearer_context_req, &attach_accept.esm_msg);
liblte_mme_pack_attach_accept_msg(&attach_accept, sec_hdr_type, ue_ctx->security_ctxt.dl_nas_count, (LIBLTE_BYTE_MSG_STRUCT *) nas_buffer);
//Integrity protect NAS message
uint8_t mac[4];
srslte::security_128_eia1 (&ue_ctx->security_ctxt.k_nas_int[16],
ue_ctx->security_ctxt.dl_nas_count,
0,
SECURITY_DIRECTION_DOWNLINK,
&nas_buffer->msg[5],
nas_buffer->N_bytes - 5,
mac
);
memcpy(&nas_buffer->msg[1],mac,4);
m_s1ap_log->info("Packed Attach Complete\n");
//Add nas message to context setup request
erab_ctxt->nAS_PDU_present = true;
memcpy(erab_ctxt->nAS_PDU.buffer, nas_buffer->msg, nas_buffer->N_bytes);
erab_ctxt->nAS_PDU.n_octets = nas_buffer->N_bytes;
return true;
}
/*Helper functions*/
@ -857,115 +968,4 @@ s1ap_nas_transport::log_unhandled_initial_ue_message_ies(LIBLTE_S1AP_MESSAGE_INI
}
bool
s1ap_nas_transport::pack_attach_accept(ue_ctx_t *ue_ctx, LIBLTE_S1AP_E_RABTOBESETUPITEMCTXTSUREQ_STRUCT *erab_ctxt, struct srslte::gtpc_pdn_address_allocation_ie *paa, srslte::byte_buffer_t *nas_buffer) {
LIBLTE_MME_ATTACH_ACCEPT_MSG_STRUCT attach_accept;
LIBLTE_MME_ACTIVATE_DEFAULT_EPS_BEARER_CONTEXT_REQUEST_MSG_STRUCT act_def_eps_bearer_context_req;
bzero(&act_def_eps_bearer_context_req,sizeof(LIBLTE_MME_ACTIVATE_DEFAULT_EPS_BEARER_CONTEXT_REQUEST_MSG_STRUCT));
m_s1ap_log->info("Packing Attach Accept\n");
//Attach accept
attach_accept.eps_attach_result = LIBLTE_MME_EPS_ATTACH_RESULT_EPS_ONLY;
//Mandatory
//FIXME: Set t3412 from config
attach_accept.t3412.unit = LIBLTE_MME_GPRS_TIMER_UNIT_1_MINUTE; // GPRS 1 minute unit
attach_accept.t3412.value = 30; // 30 minute periodic timer
//FIXME: Set tai_list from config
attach_accept.tai_list.N_tais = 1;
attach_accept.tai_list.tai[0].mcc = 1;
attach_accept.tai_list.tai[0].mnc = 1;
attach_accept.tai_list.tai[0].tac = 7;
//Allocate a GUTI ot the UE
attach_accept.guti_present=true;
attach_accept.guti.type_of_id = 6; //110 -> GUTI
attach_accept.guti.guti.mcc = 1;
attach_accept.guti.guti.mnc = 1;
attach_accept.guti.guti.mme_group_id = 0x0001;
attach_accept.guti.guti.mme_code = 0x1a;
attach_accept.guti.guti.m_tmsi = 0x124ae;
/*
typedef struct{
uint32 m_tmsi;
uint16 mcc;
uint16 mnc;
uint16 mme_group_id;
uint8 mme_code;
}LIBLTE_MME_EPS_MOBILE_ID_GUTI_STRUCT;
typedef struct{
LIBLTE_MME_EPS_MOBILE_ID_GUTI_STRUCT guti;
uint8 type_of_id;
uint8 imsi[15];
uint8 imei[15];
}LIBLTE_MME_EPS_MOBILE_ID_STRUCT;*/
//Make sure all unused options are set to false
attach_accept.lai_present=false;
attach_accept.ms_id_present=false;
attach_accept.emm_cause_present=false;
attach_accept.t3402_present=false;
attach_accept.t3423_present=false;
attach_accept.equivalent_plmns_present=false;
attach_accept.emerg_num_list_present=false;
attach_accept.eps_network_feature_support_present=false;
attach_accept.additional_update_result_present=false;
attach_accept.t3412_ext_present=false;
//Set activate default eps bearer (esm_ms)
//Set pdn_addr
act_def_eps_bearer_context_req.pdn_addr.pdn_type = LIBLTE_MME_PDN_TYPE_IPV4;
memcpy(act_def_eps_bearer_context_req.pdn_addr.addr, &paa->ipv4, 4);
//Set eps bearer id
act_def_eps_bearer_context_req.eps_bearer_id = erab_ctxt->e_RAB_ID.E_RAB_ID;
printf("%d\n",act_def_eps_bearer_context_req.eps_bearer_id);
act_def_eps_bearer_context_req.transaction_id_present = false;
//set eps_qos
act_def_eps_bearer_context_req.eps_qos.qci = erab_ctxt->e_RABlevelQoSParameters.qCI.QCI;
act_def_eps_bearer_context_req.eps_qos.mbr_ul = 254; //FIXME
act_def_eps_bearer_context_req.eps_qos.mbr_dl = 254; //FIXME
act_def_eps_bearer_context_req.eps_qos.mbr_ul_ext = 250; //FIXME
act_def_eps_bearer_context_req.eps_qos.mbr_dl_ext = 250; //FIXME check
//set apn
//act_def_eps_bearer_context_req.apn
std::string apn("test123");
act_def_eps_bearer_context_req.apn.apn = apn; //FIXME
act_def_eps_bearer_context_req.proc_transaction_id = ue_ctx->procedure_transaction_id; //FIXME
//Set DNS server
act_def_eps_bearer_context_req.protocol_cnfg_opts_present = true;
act_def_eps_bearer_context_req.protocol_cnfg_opts.N_opts = 1;
act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].id = 0x0d;
act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].len = 4;
act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].contents[0] = 8;
act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].contents[1] = 8;
act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].contents[2] = 8;
act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].contents[3] = 8;
uint8_t sec_hdr_type =2;
ue_ctx->security_ctxt.dl_nas_count++;
liblte_mme_pack_activate_default_eps_bearer_context_request_msg(&act_def_eps_bearer_context_req, &attach_accept.esm_msg);
liblte_mme_pack_attach_accept_msg(&attach_accept, sec_hdr_type, ue_ctx->security_ctxt.dl_nas_count, (LIBLTE_BYTE_MSG_STRUCT *) nas_buffer);
//Integrity protect NAS message
uint8_t mac[4];
srslte::security_128_eia1 (&ue_ctx->security_ctxt.k_nas_int[16],
ue_ctx->security_ctxt.dl_nas_count,
0,
SECURITY_DIRECTION_DOWNLINK,
&nas_buffer->msg[5],
nas_buffer->N_bytes - 5,
mac
);
memcpy(&nas_buffer->msg[1],mac,4);
m_s1ap_log->info("Packed Attach Complete\n");
//Add nas message to context setup request
erab_ctxt->nAS_PDU_present = true;
memcpy(erab_ctxt->nAS_PDU.buffer, nas_buffer->msg, nas_buffer->N_bytes);
erab_ctxt->nAS_PDU.n_octets = nas_buffer->N_bytes;
return true;
}
} //namespace srsepc

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