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srsLTE
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Changing send initial context setup.

This commit is contained in:
Pedro Alvarez 2018-02-06 16:23:41 +00:00
parent 7c21b4cc11
commit 86adc29ce8
3 changed files with 28 additions and 22 deletions
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2
srsepc/hdr/mme/s1ap_nas_transport.h
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@ -79,7 +79,7 @@ public:
bool pack_security_mode_command(srslte::byte_buffer_t *reply_msg, ue_emm_ctx_t *ue_emm_ctx, ue_ecm_ctx_t *ue_ecm_ctx);
bool pack_esm_information_request(srslte::byte_buffer_t *reply_msg, ue_emm_ctx_t *ue_emm_ctx, ue_ecm_ctx_t *ue_ecm_ctx);
bool 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);
bool pack_attach_accept(ue_emm_ctx_t *ue_emm_ctx, ue_ecm_ctx_t *ue_ecm_ctx, LIBLTE_S1AP_E_RABTOBESETUPITEMCTXTSUREQ_STRUCT *erab_ctxt, struct srslte::gtpc_pdn_address_allocation_ie *paa, srslte::byte_buffer_t *nas_buffer);
bool pack_identity_request(srslte::byte_buffer_t *reply_msg, uint32_t enb_ue_s1ap_id, uint32_t mme_ue_s1ap_id);
bool pack_emm_information(srslte::byte_buffer_t *reply_msg, uint32_t enb_ue_s1ap_id, uint32_t mme_ue_s1ap_id);

34
srsepc/src/mme/s1ap_ctx_mngmt_proc.cc
View File

@ -98,19 +98,25 @@ s1ap_ctx_mngmt_proc::send_initial_context_setup_request(uint32_t mme_ue_s1ap_id,
m_s1ap_log->info("Preparing to send Initial Context Setup request\n");
//Find UE Context
ue_ctx_t *ue_ctx = m_s1ap->find_ue_ctx(mme_ue_s1ap_id);
if(ue_ctx == NULL)
ue_ecm_ctx_t *ue_ecm_ctx = m_s1ap->find_ue_ecm_ctx_from_mme_ue_s1ap_id(mme_ue_s1ap_id);
if(ue_ecm_ctx == NULL)
{
m_s1ap_log->error("Could not find UE to send Setup Context Request. MME S1AP Id: %d", mme_ue_s1ap_id);
return false;
}
ue_emm_ctx_t *ue_emm_ctx = m_s1ap->find_ue_emm_ctx_from_imsi(ue_ecm_ctx->imsi);
if(ue_emm_ctx == NULL)
{
m_s1ap_log->error("Could not find UE to send Setup Context Request. MME S1AP Id: %d", mme_ue_s1ap_id);
return false;
}
//Add MME and eNB S1AP Ids
in_ctxt_req->MME_UE_S1AP_ID.MME_UE_S1AP_ID = ue_ctx->mme_ue_s1ap_id;
in_ctxt_req->eNB_UE_S1AP_ID.ENB_UE_S1AP_ID = ue_ctx->enb_ue_s1ap_id;
in_ctxt_req->MME_UE_S1AP_ID.MME_UE_S1AP_ID = ue_ecm_ctx->mme_ue_s1ap_id;
in_ctxt_req->eNB_UE_S1AP_ID.ENB_UE_S1AP_ID = ue_ecm_ctx->enb_ue_s1ap_id;
//Set UE-AMBR
in_ctxt_req->uEaggregateMaximumBitrate.uEaggregateMaximumBitRateDL.BitRate=1000000000;//2^32-1
in_ctxt_req->uEaggregateMaximumBitrate.uEaggregateMaximumBitRateDL.BitRate=1000000000;
in_ctxt_req->uEaggregateMaximumBitrate.uEaggregateMaximumBitRateUL.BitRate=1000000000;//FIXME Get UE-AMBR from HSS
//Setup eRAB context
@ -143,7 +149,7 @@ s1ap_ctx_mngmt_proc::send_initial_context_setup_request(uint32_t mme_ue_s1ap_id,
bzero(in_ctxt_req->UESecurityCapabilities.integrityProtectionAlgorithms.buffer,sizeof(uint8_t)*16);
for(int i = 0; i<3; i++)
{
if(ue_ctx->security_ctxt.ue_network_cap.eea[i+1] == true)
if(ue_emm_ctx->security_ctxt.ue_network_cap.eea[i+1] == true)
{
in_ctxt_req->UESecurityCapabilities.encryptionAlgorithms.buffer[i] = 1; //EEA supported
}
@ -151,7 +157,7 @@ s1ap_ctx_mngmt_proc::send_initial_context_setup_request(uint32_t mme_ue_s1ap_id,
{
in_ctxt_req->UESecurityCapabilities.encryptionAlgorithms.buffer[i] = 0; //EEA not supported
}
if(ue_ctx->security_ctxt.ue_network_cap.eia[i+1] == true)
if(ue_emm_ctx->security_ctxt.ue_network_cap.eia[i+1] == true)
{
in_ctxt_req->UESecurityCapabilities.integrityProtectionAlgorithms.buffer[i] = 1; //EEA supported
}
@ -162,9 +168,9 @@ s1ap_ctx_mngmt_proc::send_initial_context_setup_request(uint32_t mme_ue_s1ap_id,
// in_ctxt_req->UESecurityCapabilities.integrityProtectionAlgorithms.buffer[0] = 1; //EIA1
}
uint8_t key_enb[32];
liblte_security_generate_k_enb(ue_ctx->security_ctxt.k_asme, ue_ctx->security_ctxt.ul_nas_count, key_enb);
liblte_security_generate_k_enb(ue_emm_ctx->security_ctxt.k_asme, ue_emm_ctx->security_ctxt.ul_nas_count, key_enb);
liblte_unpack(key_enb, 32, in_ctxt_req->SecurityKey.buffer);
m_s1ap_log->info("Generating KeNB with UL NAS COUNT: %d\n",ue_ctx->security_ctxt.ul_nas_count);
m_s1ap_log->info("Generating KeNB with UL NAS COUNT: %d\n",ue_emm_ctx->security_ctxt.ul_nas_count);
//Set Attach accepted and activat default bearer NAS messages
if(cs_resp->paa_present != true)
{
@ -177,7 +183,7 @@ s1ap_ctx_mngmt_proc::send_initial_context_setup_request(uint32_t mme_ue_s1ap_id,
return false;
}
srslte::byte_buffer_t *nas_buffer = m_pool->allocate();
m_s1ap_nas_transport->pack_attach_accept(ue_ctx, erab_ctxt, &cs_resp->paa, nas_buffer);
m_s1ap_nas_transport->pack_attach_accept(ue_emm_ctx, ue_ecm_ctx, erab_ctxt, &cs_resp->paa, nas_buffer);
LIBLTE_ERROR_ENUM err = liblte_s1ap_pack_s1ap_pdu(&pdu, (LIBLTE_BYTE_MSG_STRUCT*)reply_buffer);
@ -187,7 +193,7 @@ s1ap_ctx_mngmt_proc::send_initial_context_setup_request(uint32_t mme_ue_s1ap_id,
return false;
}
//Send Reply to eNB
ssize_t n_sent = sctp_send(s1mme,reply_buffer->msg, reply_buffer->N_bytes, &ue_ctx->enb_sri, 0);
ssize_t n_sent = sctp_send(s1mme,reply_buffer->msg, reply_buffer->N_bytes, &ue_ecm_ctx->enb_sri, 0);
if(n_sent == -1)
{
m_s1ap_log->error("Failed to send Initial Context Setup Request\n");
@ -195,9 +201,9 @@ s1ap_ctx_mngmt_proc::send_initial_context_setup_request(uint32_t mme_ue_s1ap_id,
}
//Change E-RAB state to Context Setup Requested and save S-GW control F-TEID
ue_ctx->erabs_ctx[erab_ctxt->e_RAB_ID.E_RAB_ID].state = ERAB_CTX_REQUESTED;
ue_ctx->erabs_ctx[erab_ctxt->e_RAB_ID.E_RAB_ID].sgw_ctrl_fteid.teid = sgw_ctrl_fteid.teid;
ue_ctx->erabs_ctx[erab_ctxt->e_RAB_ID.E_RAB_ID].sgw_ctrl_fteid.ipv4 = sgw_ctrl_fteid.ipv4;
ue_ecm_ctx->erabs_ctx[erab_ctxt->e_RAB_ID.E_RAB_ID].state = ERAB_CTX_REQUESTED;
ue_ecm_ctx->erabs_ctx[erab_ctxt->e_RAB_ID.E_RAB_ID].sgw_ctrl_fteid.teid = sgw_ctrl_fteid.teid;
ue_ecm_ctx->erabs_ctx[erab_ctxt->e_RAB_ID.E_RAB_ID].sgw_ctrl_fteid.ipv4 = sgw_ctrl_fteid.ipv4;
struct in_addr addr;
addr.s_addr = htonl(sgw_s1u_ip);

14
srsepc/src/mme/s1ap_nas_transport.cc
View File

@ -993,7 +993,7 @@ s1ap_nas_transport::pack_esm_information_request(srslte::byte_buffer_t *reply_ms
}
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) {
s1ap_nas_transport::pack_attach_accept(ue_emm_ctx_t *ue_emm_ctx, ue_ecm_ctx_t *ue_ecm_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));
@ -1040,7 +1040,7 @@ s1ap_nas_transport::pack_attach_accept(ue_ctx_t *ue_ctx, LIBLTE_S1AP_E_RABTOBESE
attach_accept.guti.guti.mnc = mnc;
attach_accept.guti.guti.mme_group_id = m_s1ap->m_s1ap_args.mme_group;
attach_accept.guti.guti.mme_code = m_s1ap->m_s1ap_args.mme_code;
attach_accept.guti.guti.m_tmsi = m_s1ap->allocate_m_tmsi(ue_ctx->mme_ue_s1ap_id);
attach_accept.guti.guti.m_tmsi = m_s1ap->allocate_m_tmsi(ue_ecm_ctx->mme_ue_s1ap_id);
m_s1ap_log->debug("Allocated GUTI: MCC %d, MNC %d, MME Group Id %d, MME Code 0x%x, M-TMSI 0x%x\n",
attach_accept.guti.guti.mcc,
attach_accept.guti.guti.mnc,
@ -1077,7 +1077,7 @@ s1ap_nas_transport::pack_attach_accept(ue_ctx_t *ue_ctx, LIBLTE_S1AP_E_RABTOBESE
//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
act_def_eps_bearer_context_req.proc_transaction_id = ue_emm_ctx->procedure_transaction_id; //FIXME
//Set DNS server
act_def_eps_bearer_context_req.protocol_cnfg_opts_present = true;
@ -1098,13 +1098,13 @@ s1ap_nas_transport::pack_attach_accept(ue_ctx_t *ue_ctx, LIBLTE_S1AP_E_RABTOBESE
act_def_eps_bearer_context_req.esm_cause_present = false;
uint8_t sec_hdr_type =2;
ue_ctx->security_ctxt.dl_nas_count++;
ue_emm_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);
liblte_mme_pack_attach_accept_msg(&attach_accept, sec_hdr_type, ue_emm_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,
srslte::security_128_eia1 (&ue_emm_ctx->security_ctxt.k_nas_int[16],
ue_emm_ctx->security_ctxt.dl_nas_count,
0,
SECURITY_DIRECTION_DOWNLINK,
&nas_buffer->msg[5],