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Moved most of IMSI attach request into nas.cc.

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master
Pedro Alvarez 6 years ago
parent f6b8982939
commit fa0c8d5995
3 changed files with 111 additions and 81 deletions
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9
srsepc/hdr/mme/nas.h
Unescape Escape View File

@ -148,6 +148,13 @@ public:
srslte::log *nas_log);
/*Initial UE messages*/
bool handle_imsi_attach_request(uint32_t enb_ue_s1ap_id,
const LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT &attach_req,
const LIBLTE_MME_PDN_CONNECTIVITY_REQUEST_MSG_STRUCT &pdn_con_req,
srslte::byte_buffer_t *reply_buffer,
bool* reply_flag,
struct sctp_sndrcvinfo *enb_sri);
bool handle_guti_attach_request_known_ue( uint32_t enb_ue_s1ap_id,
const LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT &attach_req,
const LIBLTE_MME_PDN_CONNECTIVITY_REQUEST_MSG_STRUCT &pdn_con_req,
@ -173,7 +180,7 @@ public:
bool handle_authentication_failure( srslte::byte_buffer_t *nas_msg, srslte::byte_buffer_t *reply_buffer, bool *reply_flag);
bool handle_nas_detach_request( srslte::byte_buffer_t *nas_msg, srslte::byte_buffer_t *reply_buffer, bool *reply_flag);
/* Downlink NAS messages packing*/
/* Downlink NAS messages packing */
bool pack_authentication_request (srslte::byte_buffer_t *reply_msg);
bool pack_authentication_reject (srslte::byte_buffer_t *reply_msg);
bool pack_security_mode_command (srslte::byte_buffer_t *reply_msg);

95
srsepc/src/mme/nas.cc
Unescape Escape View File

@ -73,6 +73,101 @@ nas::init(uint16_t mcc,
********************************/
//FIXME Move UE Initiating mesages from s1ap_nas_transport
bool
nas::handle_imsi_attach_request(uint32_t enb_ue_s1ap_id,
const LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT &attach_req,
const LIBLTE_MME_PDN_CONNECTIVITY_REQUEST_MSG_STRUCT &pdn_con_req,
srslte::byte_buffer_t *reply_buffer,
bool* reply_flag,
struct sctp_sndrcvinfo *enb_sri)
{
//Get IMSI
uint64_t imsi = 0;
for(int i=0;i<=14;i++){
imsi += attach_req.eps_mobile_id.imsi[i]*std::pow(10,14-i);
}
//Save IMSI, MME UE S1AP Id and make sure UE is EMM_DEREGISTERED
m_emm_ctx.imsi = imsi;
m_emm_ctx.state = EMM_STATE_DEREGISTERED;
m_ecm_ctx.mme_ue_s1ap_id = m_s1ap->get_next_mme_ue_s1ap_id();
//Save UE network capabilities
memcpy(&m_sec_ctx.ue_network_cap, &attach_req.ue_network_cap, sizeof(LIBLTE_MME_UE_NETWORK_CAPABILITY_STRUCT));
m_sec_ctx.ms_network_cap_present = attach_req.ms_network_cap_present;
if (attach_req.ms_network_cap_present) {
memcpy(&m_sec_ctx.ms_network_cap, &attach_req.ms_network_cap, sizeof(LIBLTE_MME_MS_NETWORK_CAPABILITY_STRUCT));
}
uint8_t eps_bearer_id = pdn_con_req.eps_bearer_id; //TODO: Unused
m_emm_ctx.procedure_transaction_id = pdn_con_req.proc_transaction_id;
//Initialize NAS count
m_sec_ctx.ul_nas_count = 0;
m_sec_ctx.dl_nas_count = 0;
//Set eNB information
m_ecm_ctx.enb_ue_s1ap_id = enb_ue_s1ap_id;
memcpy(&m_ecm_ctx.enb_sri, enb_sri, sizeof(struct sctp_sndrcvinfo));
//Save whether secure ESM information transfer is necessary
m_ecm_ctx.eit = pdn_con_req.esm_info_transfer_flag_present;
//Initialize E-RABs
for (uint i = 0 ; i< MAX_ERABS_PER_UE; i++) {
m_esm_ctx[i].state = ERAB_DEACTIVATED;
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;
//Get Authentication Vectors from HSS
if (!m_hss->gen_auth_info_answer(m_emm_ctx.imsi, m_sec_ctx.k_asme, m_sec_ctx.autn, m_sec_ctx.rand, m_sec_ctx.xres)) {
m_nas_log->console("User not found. IMSI %015lu\n",m_emm_ctx.imsi);
m_nas_log->info("User not found. IMSI %015lu\n",m_emm_ctx.imsi);
return false;
}
//Allocate eKSI for this authentication vector
//Here we assume a new security context thus a new eKSI
m_sec_ctx.eksi=0;
//Save the UE context
m_s1ap->add_nas_ctx_to_imsi_map(this);
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);
//Pack NAS Authentication Request in Downlink NAS Transport msg
pack_authentication_request(reply_buffer);
//Send reply to eNB
*reply_flag = true;
m_nas_log->info("Downlink NAS: Sending Authentication Request\n");
m_nas_log->console("Downlink NAS: Sending Authentication Request\n");
return true;
}
bool
nas::handle_guti_attach_request_known_ue( uint32_t enb_ue_s1ap_id,
const LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT &attach_req,

88
srsepc/src/mme/s1ap_nas_transport.cc
Unescape Escape View File

@ -379,89 +379,17 @@ s1ap_nas_transport::handle_nas_imsi_attach_request(uint32_t enb_ue_s1ap_id,
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);
emm_ctx_t *emm_ctx = &nas_ctx->m_emm_ctx;
ecm_ctx_t *ecm_ctx = &nas_ctx->m_ecm_ctx;
sec_ctx_t *sec_ctx = &nas_ctx->m_sec_ctx;
//Save IMSI, MME UE S1AP Id and make sure UE is EMM_DEREGISTERED
emm_ctx->imsi = imsi;
emm_ctx->state = EMM_STATE_DEREGISTERED;
ecm_ctx->mme_ue_s1ap_id = m_s1ap->get_next_mme_ue_s1ap_id();
//Save UE network capabilities
memcpy(&sec_ctx->ue_network_cap, &attach_req.ue_network_cap, sizeof(LIBLTE_MME_UE_NETWORK_CAPABILITY_STRUCT));
sec_ctx->ms_network_cap_present = attach_req.ms_network_cap_present;
if (attach_req.ms_network_cap_present) {
memcpy(&sec_ctx->ms_network_cap, &attach_req.ms_network_cap, sizeof(LIBLTE_MME_MS_NETWORK_CAPABILITY_STRUCT));
}
uint8_t eps_bearer_id = pdn_con_req.eps_bearer_id; //TODO: Unused
emm_ctx->procedure_transaction_id = pdn_con_req.proc_transaction_id;
//Initialize NAS count
sec_ctx->ul_nas_count = 0;
sec_ctx->dl_nas_count = 0;
//Set eNB information
ecm_ctx->enb_ue_s1ap_id = enb_ue_s1ap_id;
memcpy(&ecm_ctx->enb_sri, enb_sri, sizeof(struct sctp_sndrcvinfo));
//Save whether secure ESM information transfer is necessary
ecm_ctx->eit = pdn_con_req.esm_info_transfer_flag_present;
//Initialize E-RABs
for (uint i = 0 ; i< MAX_ERABS_PER_UE; i++) {
nas_ctx->m_esm_ctx[i].state = ERAB_DEACTIVATED;
nas_ctx->m_esm_ctx[i].erab_id = i;
}
//Log Attach Request information
m_s1ap_log->console("Attach request -- IMSI: %015lu\n", emm_ctx->imsi);
m_s1ap_log->info("Attach request -- IMSI: %015lu\n", emm_ctx->imsi);
m_s1ap_log->console("Attach request -- eNB-UE S1AP Id: %d, MME-UE S1AP Id: %d\n", ecm_ctx->enb_ue_s1ap_id, ecm_ctx->mme_ue_s1ap_id);
m_s1ap_log->info("Attach request -- eNB-UE S1AP Id: %d, MME-UE S1AP Id: %d\n", ecm_ctx->enb_ue_s1ap_id, ecm_ctx->mme_ue_s1ap_id);
m_s1ap_log->console("Attach request -- Attach type: %d\n", attach_req.eps_attach_type);
m_s1ap_log->info("Attach request -- Attach type: %d\n", attach_req.eps_attach_type);
m_s1ap_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_s1ap_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_s1ap_log->console("Attach Request -- MS Network Capabilities Present: %s\n", attach_req.ms_network_cap_present ? "true" : "false");
m_s1ap_log->console("PDN Connectivity Request -- EPS Bearer Identity requested: %d\n", pdn_con_req.eps_bearer_id);
m_s1ap_log->console("PDN Connectivity Request -- Procedure Transaction Id: %d\n", pdn_con_req.proc_transaction_id);
m_s1ap_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
emm_ctx->attach_type = attach_req.eps_attach_type;
//Get Authentication Vectors from HSS
if (!m_hss->gen_auth_info_answer(emm_ctx->imsi, sec_ctx->k_asme, sec_ctx->autn, sec_ctx->rand, sec_ctx->xres)) {
m_s1ap_log->console("User not found. IMSI %015lu\n",emm_ctx->imsi);
m_s1ap_log->info("User not found. IMSI %015lu\n",emm_ctx->imsi);
bool err = nas_ctx->handle_imsi_attach_request( enb_ue_s1ap_id,
attach_req,
pdn_con_req,
reply_buffer,
reply_flag,
enb_sri);
if (err == false){
delete nas_ctx;
return false;
}
//Allocate eKSI for this authentication vector
//Here we assume a new security context thus a new eKSI
sec_ctx->eksi=0;
//Save the UE context
m_s1ap->add_nas_ctx_to_imsi_map(nas_ctx);
m_s1ap->add_nas_ctx_to_mme_ue_s1ap_id_map(nas_ctx);
m_s1ap->add_ue_to_enb_set(enb_sri->sinfo_assoc_id,ecm_ctx->mme_ue_s1ap_id);
//Pack NAS Authentication Request in Downlink NAS Transport msg
nas_ctx->pack_authentication_request(reply_buffer);
//Send reply to eNB
*reply_flag = true;
m_s1ap_log->info("Downlink NAS: Sending Authentication Request\n");
m_s1ap_log->console("Downlink NAS: Sending Authentication Request\n");
return true;
return err;
}
bool

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