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srsLTE
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UE receives attach accepted ok and gets an IP. Still need to parse the initial context setup complete and modify the bearer request and setup the GTPU tunnels.

This commit is contained in:
Pedro Alvarez 2017-11-30 20:08:37 +00:00
parent 45434351cc
commit c05c328194
1 changed files with 31 additions and 9 deletions
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40
srsepc/src/mme/s1ap_nas_transport.cc
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@ -276,9 +276,9 @@ s1ap_nas_transport::pack_security_mode_command(srslte::byte_buffer_t *reply_msg,
sm_cmd.nonce_mme_present=false;
uint8_t sec_hdr_type=3;
uint32_t count=0;
LIBLTE_ERROR_ENUM err = liblte_mme_pack_security_mode_command_msg(&sm_cmd,sec_hdr_type, count,(LIBLTE_BYTE_MSG_STRUCT *) nas_buffer);
ue_ctx->security_ctxt.dl_nas_count = 0;
LIBLTE_ERROR_ENUM err = liblte_mme_pack_security_mode_command_msg(&sm_cmd,sec_hdr_type, ue_ctx->security_ctxt.dl_nas_count,(LIBLTE_BYTE_MSG_STRUCT *) nas_buffer);
if(err != LIBLTE_SUCCESS)
{
m_s1ap_log->console("Error packing Athentication Request\n");
@ -298,7 +298,7 @@ s1ap_nas_transport::pack_security_mode_command(srslte::byte_buffer_t *reply_msg,
);
srslte::security_128_eia1 (&ue_ctx->security_ctxt.k_nas_int[16],
count,
ue_ctx->security_ctxt.dl_nas_count,
0,
SECURITY_DIRECTION_DOWNLINK,
&nas_buffer->msg[5],
@ -318,9 +318,8 @@ s1ap_nas_transport::pack_security_mode_command(srslte::byte_buffer_t *reply_msg,
m_s1ap_log->console("Error packing Athentication Request\n");
return false;
}
m_pool->deallocate(nas_buffer);
m_pool->deallocate(nas_buffer);
return true;
}
@ -456,10 +455,9 @@ 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");
bzero(&attach_accept, sizeof(LIBLTE_MME_ATTACH_ACCEPT_MSG_STRUCT));
bzero(&act_def_eps_bearer_context_req, sizeof(LIBLTE_MME_ACTIVATE_DEFAULT_EPS_BEARER_CONTEXT_REQUEST_MSG_STRUCT));
//Attach accept
attach_accept.eps_attach_result = LIBLTE_MME_EPS_ATTACH_RESULT_EPS_ONLY;
@ -473,6 +471,19 @@ s1ap_nas_transport::pack_attach_accept(ue_ctx_t *ue_ctx, LIBLTE_S1AP_E_RABTOBESE
attach_accept.tai_list.tai[0].mnc = 1;
attach_accept.tai_list.tai[0].tac = 1;
//Make sure all unused options are set to false
attach_accept.guti_present=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;
@ -491,6 +502,10 @@ s1ap_nas_transport::pack_attach_accept(ue_ctx_t *ue_ctx, LIBLTE_S1AP_E_RABTOBESE
std::string apn("internet");
act_def_eps_bearer_context_req.apn.apn = apn; //FIXME
act_def_eps_bearer_context_req.proc_transaction_id = 1; //FIXME
//Make sure unused options are set to false
/*
typedef struct{
LIBLTE_MME_EPS_QUALITY_OF_SERVICE_STRUCT eps_qos; //TODO
@ -513,8 +528,10 @@ s1ap_nas_transport::pack_attach_accept(ue_ctx_t *ue_ctx, LIBLTE_S1AP_E_RABTOBESE
bool br_ext_present;
}LIBLTE_MME_EPS_QUALITY_OF_SERVICE_STRUCT;
*/
uint8_t sec_hdr_type =3;
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],
@ -529,6 +546,11 @@ s1ap_nas_transport::pack_attach_accept(ue_ctx_t *ue_ctx, LIBLTE_S1AP_E_RABTOBESE
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;
}