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Fixing up S1AP context management procedures to use the new class.

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master
Pedro Alvarez 7 years ago
parent 4c164acbc3
commit f33fcf65bf
2 changed files with 23 additions and 38 deletions
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2
srsepc/hdr/mme/s1ap_ctx_mngmt_proc.h
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@ -47,7 +47,7 @@ public:
void init(void); void init(void);
bool send_initial_context_setup_request(emm_ctx_t *emm_ctx, ecm_ctx_t *ecm_ctx, esm_ctx_t *esm_ctx); bool send_initial_context_setup_request(emm_ctx_t *emm_ctx, ecm_ctx_t *ecm_ctx, esm_ctx_t *esm_ctx, sec_ctx_t *sec_ctx);
bool handle_initial_context_setup_response(LIBLTE_S1AP_MESSAGE_INITIALCONTEXTSETUPRESPONSE_STRUCT *in_ctxt_resp); bool handle_initial_context_setup_response(LIBLTE_S1AP_MESSAGE_INITIALCONTEXTSETUPRESPONSE_STRUCT *in_ctxt_resp);
bool handle_ue_context_release_request(LIBLTE_S1AP_MESSAGE_UECONTEXTRELEASEREQUEST_STRUCT *ue_rel, struct sctp_sndrcvinfo *enb_sri, srslte::byte_buffer_t *reply_buffer, bool *reply_flag); bool handle_ue_context_release_request(LIBLTE_S1AP_MESSAGE_UECONTEXTRELEASEREQUEST_STRUCT *ue_rel, struct sctp_sndrcvinfo *enb_sri, srslte::byte_buffer_t *reply_buffer, bool *reply_flag);
bool send_ue_context_release_command(ecm_ctx_t *ecm_ctx, srslte::byte_buffer_t *reply_buffer); bool send_ue_context_release_command(ecm_ctx_t *ecm_ctx, srslte::byte_buffer_t *reply_buffer);

59
srsepc/src/mme/s1ap_ctx_mngmt_proc.cc
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@ -79,13 +79,11 @@ s1ap_ctx_mngmt_proc::init(void)
} }
bool bool
s1ap_ctx_mngmt_proc::send_initial_context_setup_request(ue_emm_ctx_t *emm_ctx, s1ap_ctx_mngmt_proc::send_initial_context_setup_request(emm_ctx_t *emm_ctx,
ue_ecm_ctx_t *ecm_ctx, ecm_ctx_t *ecm_ctx,
erab_ctx_t *erab_ctx) esm_ctx_t *esm_ctx,
sec_ctx_t *sec_ctx)
{ {
int s1mme = m_s1ap->get_s1_mme();
//Prepare reply PDU //Prepare reply PDU
LIBLTE_S1AP_S1AP_PDU_STRUCT pdu; LIBLTE_S1AP_S1AP_PDU_STRUCT pdu;
bzero(&pdu, sizeof(LIBLTE_S1AP_S1AP_PDU_STRUCT)); bzero(&pdu, sizeof(LIBLTE_S1AP_S1AP_PDU_STRUCT));
@ -96,10 +94,6 @@ s1ap_ctx_mngmt_proc::send_initial_context_setup_request(ue_emm_ctx_t *emm_ctx,
init->choice_type = LIBLTE_S1AP_INITIATINGMESSAGE_CHOICE_INITIALCONTEXTSETUPREQUEST; init->choice_type = LIBLTE_S1AP_INITIATINGMESSAGE_CHOICE_INITIALCONTEXTSETUPREQUEST;
LIBLTE_S1AP_MESSAGE_INITIALCONTEXTSETUPREQUEST_STRUCT *in_ctxt_req = &init->choice.InitialContextSetupRequest; LIBLTE_S1AP_MESSAGE_INITIALCONTEXTSETUPREQUEST_STRUCT *in_ctxt_req = &init->choice.InitialContextSetupRequest;
LIBLTE_S1AP_E_RABTOBESETUPITEMCTXTSUREQ_STRUCT *erab_ctx_req = &in_ctxt_req->E_RABToBeSetupListCtxtSUReq.buffer[0]; //FIXME support more than one erab
srslte::byte_buffer_t *reply_buffer = m_pool->allocate();
m_s1ap_log->info("Preparing to send Initial Context Setup request\n"); m_s1ap_log->info("Preparing to send Initial Context Setup request\n");
//Add MME and eNB S1AP Ids //Add MME and eNB S1AP Ids
@ -108,44 +102,42 @@ s1ap_ctx_mngmt_proc::send_initial_context_setup_request(ue_emm_ctx_t *emm_ctx,
//Set UE-AMBR //Set UE-AMBR
in_ctxt_req->uEaggregateMaximumBitrate.uEaggregateMaximumBitRateDL.BitRate=1000000000; in_ctxt_req->uEaggregateMaximumBitrate.uEaggregateMaximumBitRateDL.BitRate=1000000000;
in_ctxt_req->uEaggregateMaximumBitrate.uEaggregateMaximumBitRateUL.BitRate=1000000000;//FIXME Get UE-AMBR from HSS in_ctxt_req->uEaggregateMaximumBitrate.uEaggregateMaximumBitRateUL.BitRate=1000000000;
//Setup eRAB context //Number of E-RABs to be setup
in_ctxt_req->E_RABToBeSetupListCtxtSUReq.len = 1; in_ctxt_req->E_RABToBeSetupListCtxtSUReq.len = 1;
erab_ctx_req->e_RAB_ID.E_RAB_ID = erab_ctx->erab_id;
//Setup eRAB context
LIBLTE_S1AP_E_RABTOBESETUPITEMCTXTSUREQ_STRUCT *erab_ctx_req = &in_ctxt_req->E_RABToBeSetupListCtxtSUReq.buffer[0];
erab_ctx_req->e_RAB_ID.E_RAB_ID = esm_ctx->erab_id;
//Setup E-RAB QoS parameters //Setup E-RAB QoS parameters
erab_ctx_req->e_RABlevelQoSParameters.qCI.QCI = erab_ctx->qci; erab_ctx_req->e_RABlevelQoSParameters.qCI.QCI = esm_ctx->qci;
erab_ctx_req->e_RABlevelQoSParameters.allocationRetentionPriority.priorityLevel.PriorityLevel = 15 ;//Lowest erab_ctx_req->e_RABlevelQoSParameters.allocationRetentionPriority.priorityLevel.PriorityLevel = 15 ;//Lowest
erab_ctx_req->e_RABlevelQoSParameters.allocationRetentionPriority.pre_emptionCapability = LIBLTE_S1AP_PRE_EMPTIONCAPABILITY_SHALL_NOT_TRIGGER_PRE_EMPTION; erab_ctx_req->e_RABlevelQoSParameters.allocationRetentionPriority.pre_emptionCapability = LIBLTE_S1AP_PRE_EMPTIONCAPABILITY_SHALL_NOT_TRIGGER_PRE_EMPTION;
erab_ctx_req->e_RABlevelQoSParameters.allocationRetentionPriority.pre_emptionVulnerability = LIBLTE_S1AP_PRE_EMPTIONVULNERABILITY_PRE_EMPTABLE; erab_ctx_req->e_RABlevelQoSParameters.allocationRetentionPriority.pre_emptionVulnerability = LIBLTE_S1AP_PRE_EMPTIONVULNERABILITY_PRE_EMPTABLE;
erab_ctx_req->e_RABlevelQoSParameters.gbrQosInformation_present=false; erab_ctx_req->e_RABlevelQoSParameters.gbrQosInformation_present=false;
//Set E-RAB S-GW F-TEID //Set E-RAB S-GW F-TEID
//if (cs_resp->eps_bearer_context_created.s1_u_sgw_f_teid_present == false){
// m_s1ap_log->error("Did not receive S1-U TEID in create session response\n");
// return false;
//}
erab_ctx_req->transportLayerAddress.n_bits = 32; //IPv4 erab_ctx_req->transportLayerAddress.n_bits = 32; //IPv4
uint32_t sgw_s1u_ip = htonl(erab_ctx->sgw_s1u_fteid.ipv4); uint32_t sgw_s1u_ip = htonl(erab_ctx->sgw_s1u_fteid.ipv4);
//uint32_t sgw_s1u_ip = cs_resp->eps_bearer_context_created.s1_u_sgw_f_teid.ipv4; //uint32_t sgw_s1u_ip = cs_resp->eps_bearer_context_created.s1_u_sgw_f_teid.ipv4;
uint8_t *tmp_ptr = erab_ctx_req->transportLayerAddress.buffer; uint8_t *tmp_ptr = erab_ctx_req->transportLayerAddress.buffer;
liblte_value_2_bits(sgw_s1u_ip, &tmp_ptr, 32);//FIXME consider ipv6 liblte_value_2_bits(sgw_s1u_ip, &tmp_ptr, 32);//FIXME consider ipv6
uint32_t sgw_s1u_teid = erab_ctx->sgw_s1u_fteid.teid; uint32_t sgw_s1u_teid = esm_ctx->sgw_s1u_fteid.teid;
memcpy(erab_ctx_req->gTP_TEID.buffer, &sgw_s1u_teid, sizeof(uint32_t)); memcpy(erab_ctx_req->gTP_TEID.buffer, &sgw_s1u_teid, sizeof(uint32_t));
//Set UE security capabilities and k_enb //Set UE security capabilities and k_enb
bzero(in_ctxt_req->UESecurityCapabilities.encryptionAlgorithms.buffer,sizeof(uint8_t)*16); bzero(in_ctxt_req->UESecurityCapabilities.encryptionAlgorithms.buffer,sizeof(uint8_t)*16);
bzero(in_ctxt_req->UESecurityCapabilities.integrityProtectionAlgorithms.buffer,sizeof(uint8_t)*16); bzero(in_ctxt_req->UESecurityCapabilities.integrityProtectionAlgorithms.buffer,sizeof(uint8_t)*16);
for (int i = 0; i<3; i++) { for (int i = 0; i<3; i++) {
if(emm_ctx->security_ctxt.ue_network_cap.eea[i+1] == true){ if(sec_ctx->ue_network_cap.eea[i+1] == true){
in_ctxt_req->UESecurityCapabilities.encryptionAlgorithms.buffer[i] = 1; //EEA supported in_ctxt_req->UESecurityCapabilities.encryptionAlgorithms.buffer[i] = 1; //EEA supported
} else { } else {
in_ctxt_req->UESecurityCapabilities.encryptionAlgorithms.buffer[i] = 0; //EEA not supported in_ctxt_req->UESecurityCapabilities.encryptionAlgorithms.buffer[i] = 0; //EEA not supported
} }
if(emm_ctx->security_ctxt.ue_network_cap.eia[i+1] == true){ if(sec_ctx->ue_network_cap.eia[i+1] == true){
in_ctxt_req->UESecurityCapabilities.integrityProtectionAlgorithms.buffer[i] = 1; //EEA supported in_ctxt_req->UESecurityCapabilities.integrityProtectionAlgorithms.buffer[i] = 1; //EEA supported
} else { } else {
in_ctxt_req->UESecurityCapabilities.integrityProtectionAlgorithms.buffer[i] = 0; //EEA not supported in_ctxt_req->UESecurityCapabilities.integrityProtectionAlgorithms.buffer[i] = 0; //EEA not supported
@ -153,8 +145,8 @@ s1ap_ctx_mngmt_proc::send_initial_context_setup_request(ue_emm_ctx_t *emm_ctx,
} }
//Get K eNB //Get K eNB
liblte_unpack(emm_ctx->security_ctxt.k_enb, 32, in_ctxt_req->SecurityKey.buffer); liblte_unpack(sec_ctx->k_enb, 32, in_ctxt_req->SecurityKey.buffer);
m_s1ap_log->info_hex(emm_ctx->security_ctxt.k_enb, 32, "Initial Context Setup Request -- Key eNB (k_enb)\n"); m_s1ap_log->info_hex(sec_ctx->k_enb, 32, "Initial Context Setup Request -- Key eNB (k_enb)\n");
srslte::byte_buffer_t *nas_buffer = m_pool->allocate(); srslte::byte_buffer_t *nas_buffer = m_pool->allocate();
if (emm_ctx->state == EMM_STATE_DEREGISTERED) { if (emm_ctx->state == EMM_STATE_DEREGISTERED) {
@ -164,13 +156,12 @@ s1ap_ctx_mngmt_proc::send_initial_context_setup_request(ue_emm_ctx_t *emm_ctx,
m_s1ap_nas_transport->pack_attach_accept(emm_ctx, ecm_ctx, erab_ctx_req, &erab_ctx->pdn_addr_alloc, nas_buffer); m_s1ap_nas_transport->pack_attach_accept(emm_ctx, ecm_ctx, erab_ctx_req, &erab_ctx->pdn_addr_alloc, nas_buffer);
} }
srslte::byte_buffer_t *reply_buffer = m_pool->allocate();
LIBLTE_ERROR_ENUM err = liblte_s1ap_pack_s1ap_pdu(&pdu, (LIBLTE_BYTE_MSG_STRUCT*)reply_buffer); LIBLTE_ERROR_ENUM err = liblte_s1ap_pack_s1ap_pdu(&pdu, (LIBLTE_BYTE_MSG_STRUCT*)reply_buffer);
if (err != LIBLTE_SUCCESS) { if (err != LIBLTE_SUCCESS) {
m_s1ap_log->error("Could not pack Initial Context Setup Request Message\n"); m_s1ap_log->error("Could not pack Initial Context Setup Request Message\n");
return false; return false;
} }
if (!m_s1ap->s1ap_tx_pdu(reply_buffer,&ecm_ctx->enb_sri)) { if (!m_s1ap->s1ap_tx_pdu(reply_buffer,&ecm_ctx->enb_sri)) {
m_s1ap_log->error("Error sending Initial Context Setup Request.\n"); m_s1ap_log->error("Error sending Initial Context Setup Request.\n");
return false; return false;
@ -306,9 +297,6 @@ s1ap_ctx_mngmt_proc::handle_ue_context_release_request(LIBLTE_S1AP_MESSAGE_UECON
bool bool
s1ap_ctx_mngmt_proc::send_ue_context_release_command(ue_ecm_ctx_t *ecm_ctx, srslte::byte_buffer_t *reply_buffer) s1ap_ctx_mngmt_proc::send_ue_context_release_command(ue_ecm_ctx_t *ecm_ctx, srslte::byte_buffer_t *reply_buffer)
{ {
int s1mme = m_s1ap->get_s1_mme();
//Prepare reply PDU //Prepare reply PDU
LIBLTE_S1AP_S1AP_PDU_STRUCT pdu; LIBLTE_S1AP_S1AP_PDU_STRUCT pdu;
bzero(&pdu, sizeof(LIBLTE_S1AP_S1AP_PDU_STRUCT)); bzero(&pdu, sizeof(LIBLTE_S1AP_S1AP_PDU_STRUCT));
@ -319,7 +307,6 @@ s1ap_ctx_mngmt_proc::send_ue_context_release_command(ue_ecm_ctx_t *ecm_ctx, srsl
init->choice_type = LIBLTE_S1AP_INITIATINGMESSAGE_CHOICE_UECONTEXTRELEASECOMMAND; init->choice_type = LIBLTE_S1AP_INITIATINGMESSAGE_CHOICE_UECONTEXTRELEASECOMMAND;
LIBLTE_S1AP_MESSAGE_UECONTEXTRELEASECOMMAND_STRUCT *ctx_rel_cmd = &init->choice.UEContextReleaseCommand; LIBLTE_S1AP_MESSAGE_UECONTEXTRELEASECOMMAND_STRUCT *ctx_rel_cmd = &init->choice.UEContextReleaseCommand;
ctx_rel_cmd->UE_S1AP_IDs.choice_type = LIBLTE_S1AP_UE_S1AP_IDS_CHOICE_UE_S1AP_ID_PAIR; ctx_rel_cmd->UE_S1AP_IDs.choice_type = LIBLTE_S1AP_UE_S1AP_IDS_CHOICE_UE_S1AP_ID_PAIR;
ctx_rel_cmd->UE_S1AP_IDs.choice.uE_S1AP_ID_pair.mME_UE_S1AP_ID.MME_UE_S1AP_ID = ecm_ctx->mme_ue_s1ap_id; ctx_rel_cmd->UE_S1AP_IDs.choice.uE_S1AP_ID_pair.mME_UE_S1AP_ID.MME_UE_S1AP_ID = ecm_ctx->mme_ue_s1ap_id;
ctx_rel_cmd->UE_S1AP_IDs.choice.uE_S1AP_ID_pair.eNB_UE_S1AP_ID.ENB_UE_S1AP_ID = ecm_ctx->enb_ue_s1ap_id; ctx_rel_cmd->UE_S1AP_IDs.choice.uE_S1AP_ID_pair.eNB_UE_S1AP_ID.ENB_UE_S1AP_ID = ecm_ctx->enb_ue_s1ap_id;
@ -329,18 +316,16 @@ s1ap_ctx_mngmt_proc::send_ue_context_release_command(ue_ecm_ctx_t *ecm_ctx, srsl
ctx_rel_cmd->Cause.choice.nas.e = LIBLTE_S1AP_CAUSENAS_NORMAL_RELEASE; ctx_rel_cmd->Cause.choice.nas.e = LIBLTE_S1AP_CAUSENAS_NORMAL_RELEASE;
LIBLTE_ERROR_ENUM err = liblte_s1ap_pack_s1ap_pdu(&pdu, (LIBLTE_BYTE_MSG_STRUCT*)reply_buffer); LIBLTE_ERROR_ENUM err = liblte_s1ap_pack_s1ap_pdu(&pdu, (LIBLTE_BYTE_MSG_STRUCT*)reply_buffer);
if(err != LIBLTE_SUCCESS) if(err != LIBLTE_SUCCESS){
{
m_s1ap_log->error("Could not pack Initial Context Setup Request Message\n"); m_s1ap_log->error("Could not pack Initial Context Setup Request Message\n");
return false; return false;
} }
//Send Reply to eNB
if(!m_s1ap->s1ap_tx_pdu(reply_buffer,&ecm_ctx->enb_sri)) //Send Reply to eNB
{ if(!m_s1ap->s1ap_tx_pdu(reply_buffer,&ecm_ctx->enb_sri)){
m_s1ap_log->error("Error sending UE Context Release command.\n"); m_s1ap_log->error("Error sending UE Context Release command.\n");
return false; return false;
} }
return true; return true;
} }

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