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Starting to move initial attach request handling to nas.cc

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master
Pedro Alvarez 6 years ago
parent 872f7adc49
commit 8bcc8ecaeb
3 changed files with 100 additions and 54 deletions
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122
srsepc/src/mme/nas.cc
Unescape Escape View File

@ -71,8 +71,77 @@ nas::init(uint16_t mcc,
* Handle UE Initiating Messages
*
********************************/
//FIXME Move UE Initiating mesages from s1ap_nas_transport
bool
nas::handle_nas_attach_request( uint32_t enb_ue_s1ap_id,
srslte::byte_buffer_t *nas_msg,
srslte::byte_buffer_t *reply_buffer,
bool* reply_flag,
struct sctp_sndrcvinfo *enb_sri)
{
bool save = true;
LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT attach_req;
LIBLTE_MME_PDN_CONNECTIVITY_REQUEST_MSG_STRUCT pdn_con_req;
//Get NAS Attach Request and PDN connectivity request messages
LIBLTE_ERROR_ENUM err = liblte_mme_unpack_attach_request_msg((LIBLTE_BYTE_MSG_STRUCT *) nas_msg, &attach_req);
if(err != LIBLTE_SUCCESS){
m_s1ap_log->error("Error unpacking NAS attach request. Error: %s\n", liblte_error_text[err]);
m_pool->deallocate(nas_msg);
return save;
}
/*Get PDN Connectivity Request*/
err = liblte_mme_unpack_pdn_connectivity_request_msg(&attach_req.esm_msg, &pdn_con_req);
if(err != LIBLTE_SUCCESS){
m_s1ap_log->error("Error unpacking NAS PDN Connectivity Request. Error: %s\n", liblte_error_text[err]);
m_pool->deallocate(nas_msg);
return save;
}
//Get attach type from attach request
if (attach_req.eps_mobile_id.type_of_id == LIBLTE_MME_EPS_MOBILE_ID_TYPE_IMSI) {
m_nas_log->console("Attach Request -- IMSI-style attach request\n");
m_nas_log->info("Attach Request -- IMSI-style attach request\n");
save = handle_nas_imsi_attach_request(enb_ue_s1ap_id, attach_req, pdn_con_req, reply_buffer, reply_flag, enb_sri);
} else if (attach_req.eps_mobile_id.type_of_id == LIBLTE_MME_EPS_MOBILE_ID_TYPE_GUTI) {
m_nas_log->console("Attach Request -- GUTI-style attach request\n");
m_nas_log->info("Attach Request -- GUTI-style attach request\n");
save = handle_nas_guti_attach_request(enb_ue_s1ap_id, attach_req, pdn_con_req, nas_msg, reply_buffer, reply_flag, enb_sri);
} else {
m_nas_log->error("Unhandled Mobile Id type in attach request\n");
return save;
}
//Log Attach Request information
m_nas_log->console("Attach request -- IMSI: %015lu\n", m_emm_ctx.imsi);
m_nas_log->info("Attach request -- IMSI: %015lu\n", m_emm_ctx.imsi);
m_nas_log->console("Attach request -- eNB-UE S1AP Id: %d, MME-UE S1AP Id: %d\n", m_ecm_ctx.enb_ue_s1ap_id, m_ecm_ctx.mme_ue_s1ap_id);
m_nas_log->info("Attach request -- eNB-UE S1AP Id: %d, MME-UE S1AP Id: %d\n", m_ecm_ctx.enb_ue_s1ap_id, m_ecm_ctx.mme_ue_s1ap_id);
m_nas_log->console("Attach request -- Attach type: %d\n", attach_req.eps_attach_type);
m_nas_log->info("Attach request -- Attach type: %d\n", attach_req.eps_attach_type);
m_nas_log->console("Attach Request -- UE Network Capabilities EEA: %d%d%d%d%d%d%d%d\n",
attach_req.ue_network_cap.eea[0], attach_req.ue_network_cap.eea[1], attach_req.ue_network_cap.eea[2], attach_req.ue_network_cap.eea[3],
attach_req.ue_network_cap.eea[4], attach_req.ue_network_cap.eea[5], attach_req.ue_network_cap.eea[6], attach_req.ue_network_cap.eea[7]);
m_nas_log->info("Attach Request -- UE Network Capabilities EEA: %d%d%d%d%d%d%d%d\n",
attach_req.ue_network_cap.eea[0], attach_req.ue_network_cap.eea[1], attach_req.ue_network_cap.eea[2], attach_req.ue_network_cap.eea[3],
attach_req.ue_network_cap.eea[4], attach_req.ue_network_cap.eea[5], attach_req.ue_network_cap.eea[6], attach_req.ue_network_cap.eea[7]);
m_nas_log->console("Attach Request -- UE Network Capabilities EIA: %d%d%d%d%d%d%d%d\n",
attach_req.ue_network_cap.eia[0], attach_req.ue_network_cap.eia[1], attach_req.ue_network_cap.eia[2], attach_req.ue_network_cap.eia[3],
attach_req.ue_network_cap.eia[4], attach_req.ue_network_cap.eia[5], attach_req.ue_network_cap.eia[6], attach_req.ue_network_cap.eia[7]);
m_nas_log->info("Attach Request -- UE Network Capabilities EIA: %d%d%d%d%d%d%d%d\n",
attach_req.ue_network_cap.eia[0], attach_req.ue_network_cap.eia[1], attach_req.ue_network_cap.eia[2], attach_req.ue_network_cap.eia[3],
attach_req.ue_network_cap.eia[4], attach_req.ue_network_cap.eia[5], attach_req.ue_network_cap.eia[6], attach_req.ue_network_cap.eia[7]);
m_nas_log->console("Attach Request -- MS Network Capabilities Present: %s\n", attach_req.ms_network_cap_present ? "true" : "false");
m_nas_log->info("Attach Request -- MS Network Capabilities Present: %s\n", attach_req.ms_network_cap_present ? "true" : "false");
m_nas_log->console("PDN Connectivity Request -- EPS Bearer Identity requested: %d\n", pdn_con_req.eps_bearer_id);
m_nas_log->info("PDN Connectivity Request -- EPS Bearer Identity requested: %d\n", pdn_con_req.eps_bearer_id);
m_nas_log->console("PDN Connectivity Request -- Procedure Transaction Id: %d\n", pdn_con_req.proc_transaction_id);
m_nas_log->info("PDN Connectivity Request -- Procedure Transaction Id: %d\n", pdn_con_req.proc_transaction_id);
m_nas_log->console("PDN Connectivity Request -- ESM Information Transfer requested: %s\n", pdn_con_req.esm_info_transfer_flag_present ? "true" : "false");
m_nas_log->info("PDN Connectivity Request -- ESM Information Transfer requested: %s\n", pdn_con_req.esm_info_transfer_flag_present ? "true" : "false");
return save;
}
bool
nas::handle_imsi_attach_request(uint32_t enb_ue_s1ap_id,
const LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT &attach_req,
@ -120,25 +189,6 @@ nas::handle_imsi_attach_request(uint32_t enb_ue_s1ap_id,
m_esm_ctx[i].erab_id = i;
}
//Log Attach Request information
m_nas_log->console("Attach request -- IMSI: %015lu\n", m_emm_ctx.imsi);
m_nas_log->info("Attach request -- IMSI: %015lu\n", m_emm_ctx.imsi);
m_nas_log->console("Attach request -- eNB-UE S1AP Id: %d, MME-UE S1AP Id: %d\n", m_ecm_ctx.enb_ue_s1ap_id, m_ecm_ctx.mme_ue_s1ap_id);
m_nas_log->info("Attach request -- eNB-UE S1AP Id: %d, MME-UE S1AP Id: %d\n", m_ecm_ctx.enb_ue_s1ap_id, m_ecm_ctx.mme_ue_s1ap_id);
m_nas_log->console("Attach request -- Attach type: %d\n", attach_req.eps_attach_type);
m_nas_log->info("Attach request -- Attach type: %d\n", attach_req.eps_attach_type);
m_nas_log->console("Attach Request -- UE Network Capabilities EEA: %d%d%d%d%d%d%d%d\n",
attach_req.ue_network_cap.eea[0], attach_req.ue_network_cap.eea[1], attach_req.ue_network_cap.eea[2], attach_req.ue_network_cap.eea[3],
attach_req.ue_network_cap.eea[4], attach_req.ue_network_cap.eea[5], attach_req.ue_network_cap.eea[6], attach_req.ue_network_cap.eea[7]);
m_nas_log->console("Attach Request -- UE Network Capabilities EIA: %d%d%d%d%d%d%d%d\n",
attach_req.ue_network_cap.eia[0], attach_req.ue_network_cap.eia[1], attach_req.ue_network_cap.eia[2], attach_req.ue_network_cap.eia[3],
attach_req.ue_network_cap.eia[4], attach_req.ue_network_cap.eia[5], attach_req.ue_network_cap.eia[6], attach_req.ue_network_cap.eia[7]);
m_nas_log->console("Attach Request -- MS Network Capabilities Present: %s\n", attach_req.ms_network_cap_present ? "true" : "false");
m_nas_log->console("PDN Connectivity Request -- EPS Bearer Identity requested: %d\n", pdn_con_req.eps_bearer_id);
m_nas_log->console("PDN Connectivity Request -- Procedure Transaction Id: %d\n", pdn_con_req.proc_transaction_id);
m_nas_log->console("PDN Connectivity Request -- ESM Information Transfer requested: %s\n", pdn_con_req.esm_info_transfer_flag_present ? "true" : "false");
//Save attach request type
m_emm_ctx.attach_type = attach_req.eps_attach_type;
@ -216,20 +266,6 @@ nas::handle_guti_attach_request_known_ue( uint32_t enb_ue_s1ap_id,
m_nas_log->console("Generating KeNB with UL NAS COUNT: %d\n", m_sec_ctx.ul_nas_count);
m_nas_log->info_hex(m_sec_ctx.k_enb, 32, "Key eNodeB (k_enb)\n");
m_nas_log->console("Attach request -- IMSI: %015lu\n", m_emm_ctx.imsi);
m_nas_log->info("Attach request -- IMSI: %015lu\n", m_emm_ctx.imsi);
m_nas_log->console("Attach request -- eNB-UE S1AP Id: %d, MME-UE S1AP Id: %d\n", m_ecm_ctx.enb_ue_s1ap_id, m_ecm_ctx.mme_ue_s1ap_id);
m_nas_log->console("Attach Request -- UE Network Capabilities EEA: %d%d%d%d%d%d%d%d\n",
attach_req.ue_network_cap.eea[0], attach_req.ue_network_cap.eea[1], attach_req.ue_network_cap.eea[2], attach_req.ue_network_cap.eea[3],
attach_req.ue_network_cap.eea[4], attach_req.ue_network_cap.eea[5], attach_req.ue_network_cap.eea[6], attach_req.ue_network_cap.eea[7]);
m_nas_log->console("Attach Request -- UE Network Capabilities EIA: %d%d%d%d%d%d%d%d\n",
attach_req.ue_network_cap.eia[0], attach_req.ue_network_cap.eia[1], attach_req.ue_network_cap.eia[2], attach_req.ue_network_cap.eia[3],
attach_req.ue_network_cap.eia[4], attach_req.ue_network_cap.eia[5], attach_req.ue_network_cap.eia[6], attach_req.ue_network_cap.eia[7]);
m_nas_log->console("Attach Request -- MS Network Capabilities Present: %s\n", attach_req.ms_network_cap_present ? "true" : "false");
m_nas_log->console("PDN Connectivity Request -- EPS Bearer Identity requested: %d\n", pdn_con_req.eps_bearer_id);
m_nas_log->console("PDN Connectivity Request -- Procedure Transaction Id: %d\n", pdn_con_req.proc_transaction_id);
m_nas_log->console("PDN Connectivity Request -- ESM Information Transfer requested: %s\n", pdn_con_req.esm_info_transfer_flag_present ? "true" : "false");
if (m_ecm_ctx.eit) {
m_nas_log->console("Secure ESM information transfer requested.\n");
m_nas_log->info("Secure ESM information transfer requested.\n");
@ -361,23 +397,6 @@ nas::handle_guti_attach_request_unknown_ue( uint32_t enb_ue_s1ap_id,
m_esm_ctx[i].erab_id = i;
}
m_nas_log->console("Attach request -- IMSI: %015lu\n", m_emm_ctx.imsi);
m_nas_log->info("Attach request -- IMSI: %015lu\n", m_emm_ctx.imsi);
m_nas_log->console("Attach request -- eNB-UE S1AP Id: %d, MME-UE S1AP Id: %d\n", m_ecm_ctx.enb_ue_s1ap_id, m_ecm_ctx.mme_ue_s1ap_id);
m_nas_log->console("Attach Request -- UE Network Capabilities EEA: %d%d%d%d%d%d%d%d\n",
attach_req.ue_network_cap.eea[0], attach_req.ue_network_cap.eea[1], attach_req.ue_network_cap.eea[2], attach_req.ue_network_cap.eea[3],
attach_req.ue_network_cap.eea[4], attach_req.ue_network_cap.eea[5], attach_req.ue_network_cap.eea[6], attach_req.ue_network_cap.eea[7]);
m_nas_log->console("Attach Request -- UE Network Capabilities EIA: %d%d%d%d%d%d%d%d\n",
attach_req.ue_network_cap.eia[0], attach_req.ue_network_cap.eia[1], attach_req.ue_network_cap.eia[2], attach_req.ue_network_cap.eia[3],
attach_req.ue_network_cap.eia[4], attach_req.ue_network_cap.eia[5], attach_req.ue_network_cap.eia[6], attach_req.ue_network_cap.eia[7]);
m_nas_log->console("Attach Request -- MS Network Capabilities Present: %s\n", attach_req.ms_network_cap_present ? "true" : "false");
m_nas_log->console("PDN Connectivity Request -- EPS Bearer Identity requested: %d\n", pdn_con_req.eps_bearer_id);
m_nas_log->console("PDN Connectivity Request -- Procedure Transaction Id: %d\n", pdn_con_req.proc_transaction_id);
m_nas_log->console("PDN Connectivity Request -- ESM Information Transfer requested: %s\n", pdn_con_req.esm_info_transfer_flag_present ? "true" : "false");
m_nas_log->console("Could not find M-TMSI. Sending ID request\n");
m_nas_log->info("Could not find M-TMSI=. Sending Id Request\n");
//Store temporary ue context
m_s1ap->add_nas_ctx_to_mme_ue_s1ap_id_map(this);
m_s1ap->add_ue_to_enb_set(enb_sri->sinfo_assoc_id,m_ecm_ctx.mme_ue_s1ap_id);
@ -386,6 +405,7 @@ nas::handle_guti_attach_request_unknown_ue( uint32_t enb_ue_s1ap_id,
*reply_flag = true;
return true;
}
/*
*
* Handle Uplink NAS Transport message

4
srsepc/src/mme/s1ap.cc
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@ -585,8 +585,8 @@ s1ap::allocate_m_tmsi(uint64_t imsi)
uint64_t
s1ap::find_imsi_from_m_tmsi(uint32_t m_tmsi)
{
std::map<uint32_t,uint64_t>::iterator it = m_s1ap->m_tmsi_to_imsi.find(m_tmsi);
if (it != m_s1ap->m_tmsi_to_imsi.end()) {
std::map<uint32_t,uint64_t>::iterator it = m_tmsi_to_imsi.find(m_tmsi);
if (it != m_tmsi_to_imsi.end()) {
m_s1ap_log->debug("Found IMSI %015lu from M-TMSI 0x%x", it->second, m_tmsi);
return it->second;
} else {

28
srsepc/src/mme/s1ap_nas_transport.cc
Unescape Escape View File

@ -88,6 +88,7 @@ s1ap_nas_transport::handle_initial_ue_message(LIBLTE_S1AP_MESSAGE_INITIALUEMESSA
memcpy(nas_msg->msg, &init_ue->NAS_PDU.buffer, init_ue->NAS_PDU.n_octets);
nas_msg->N_bytes = init_ue->NAS_PDU.n_octets;
uint64_t imsi;
uint32_t m_tmsi;
uint32_t enb_ue_s1ap_id = init_ue->eNB_UE_S1AP_ID.ENB_UE_S1AP_ID;
liblte_mme_parse_msg_header((LIBLTE_BYTE_MSG_STRUCT *) nas_msg, &pd, &msg_type);
@ -102,8 +103,29 @@ s1ap_nas_transport::handle_initial_ue_message(LIBLTE_S1AP_MESSAGE_INITIALUEMESSA
m_pool->deallocate(nas_msg);
return false;
}
//Get NAS context if TMSI is present
nas *nas_ctx = NULL;
if (init_ue->S_TMSI_present) {
m_tmsi = ntohl(*((uint32_t*)&init_ue->S_TMSI.m_TMSI.buffer));
imsi = m_s1ap->find_imsi_from_m_tmsi(m_tmsi);
if(imsi !=0){
nas_ctx = m_s1ap->find_nas_ctx_from_imsi(imsi);
}
}
//Create new NAS context if Attach request without known NAS context
//This will be release if the attach request returns an error
if (msg_type == LIBLTE_MME_MSG_TYPE_ATTACH_REQUEST && nas_ctx == NULL) {
nas_ctx = new nas;
nas_ctx->init(m_s1ap->m_s1ap_args.mcc,
m_s1ap->m_s1ap_args.mnc,
m_s1ap->m_s1ap_args.mme_code,
m_s1ap->m_s1ap_args.mme_group,
m_s1ap->m_s1ap_args.tac,
m_s1ap->m_s1ap_args.mme_apn,
m_s1ap->m_s1ap_args.dns_addr,
m_s1ap, m_mme_gtpc, m_hss, m_s1ap->m_nas_log);
}
switch (msg_type)
@ -111,7 +133,10 @@ s1ap_nas_transport::handle_initial_ue_message(LIBLTE_S1AP_MESSAGE_INITIALUEMESSA
case LIBLTE_MME_MSG_TYPE_ATTACH_REQUEST:
m_s1ap_log->console("Received Initial UE message -- Attach Request\n");
m_s1ap_log->info("Received Initial UE message -- Attach Request\n");
err = handle_nas_attach_request(enb_ue_s1ap_id, nas_msg, reply_buffer,reply_flag, enb_sri);
err = nas_ctx->handle_nas_attach_request(enb_ue_s1ap_id, nas_msg, reply_buffer,reply_flag, enb_sri);
if (err == false) {
delete nas_ctx;
}
break;
case LIBLTE_MME_SECURITY_HDR_TYPE_SERVICE_REQUEST:
m_s1ap_log->console("Received Initial UE message -- Service Request\n");
@ -339,6 +364,7 @@ s1ap_nas_transport::handle_nas_attach_request(uint32_t enb_ue_s1ap_id,
m_s1ap_log->error("Unhandled Mobile Id type in attach request\n");
return false;
}
return true;
}

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