From 317e988b60f55d20dc92c373da0be6891312038f Mon Sep 17 00:00:00 2001 From: Karim Baccar Date: Fri, 16 Dec 2022 16:23:14 +0100 Subject: [PATCH] Adding emergency registration procedure --- srsue/hdr/stack/upper/nas_5g.h | 2 +- srsue/hdr/stack/upper/nas_config.h | 2 ++ srsue/src/main.cc | 3 ++- srsue/src/stack/upper/nas_5g.cc | 31 ++++++++++++++-------- srsue/src/stack/upper/nas_5g_procedures.cc | 8 ++---- 5 files changed, 27 insertions(+), 19 deletions(-) diff --git a/srsue/hdr/stack/upper/nas_5g.h b/srsue/hdr/stack/upper/nas_5g.h index 122ab15e29..4b00081e8e 100644 --- a/srsue/hdr/stack/upper/nas_5g.h +++ b/srsue/hdr/stack/upper/nas_5g.h @@ -208,4 +208,4 @@ class nas_5g : public nas_base, public nas_5g_interface_rrc_nr, public nas_5g_in std::array pdu_sessions; }; } // namespace srsue -#endif \ No newline at end of file +#endif diff --git a/srsue/hdr/stack/upper/nas_config.h b/srsue/hdr/stack/upper/nas_config.h index 0d7184e2f7..f6d7a933d2 100644 --- a/srsue/hdr/stack/upper/nas_config.h +++ b/srsue/hdr/stack/upper/nas_config.h @@ -67,6 +67,8 @@ class nas_5g_args_t std::string ia5g; std::string ea5g; std::vector pdu_session_cfgs; + bool emergency_registration; + }; } // namespace srsue diff --git a/srsue/src/main.cc b/srsue/src/main.cc index ac51d2d98b..979eca69af 100644 --- a/srsue/src/main.cc +++ b/srsue/src/main.cc @@ -153,13 +153,14 @@ static int parse_args(all_args_t* args, int argc, char* argv[]) ("rrc.nr_measurement_pci", bpo::value(&args->stack.rrc_nr.sim_nr_meas_pci)->default_value(500), "NR PCI for the simulated NR measurement") ("rrc.nr_short_sn_support", bpo::value(&args->stack.rrc_nr.pdcp_short_sn_support)->default_value(true), "Announce PDCP short SN support") - ("nas.apn", bpo::value(&args->stack.nas.apn_name)->default_value(""), "Set Access Point Name (APN) for data services") + ("nas.apn", bpo::value(&args->stack.nas.apn_name)->default_value(""), "Set Access Point Name (APN) for data services") ("nas.apn_protocol", bpo::value(&args->stack.nas.apn_protocol)->default_value(""), "Set Access Point Name (APN) protocol for data services") ("nas.user", bpo::value(&args->stack.nas.apn_user)->default_value(""), "Username for CHAP authentication") ("nas.pass", bpo::value(&args->stack.nas.apn_pass)->default_value(""), "Password for CHAP authentication") ("nas.force_imsi_attach", bpo::value(&args->stack.nas.force_imsi_attach)->default_value(false), "Whether to always perform an IMSI attach") ("nas.eia", bpo::value(&args->stack.nas.eia)->default_value("1,2,3"), "List of integrity algorithms included in UE capabilities") ("nas.eea", bpo::value(&args->stack.nas.eea)->default_value("0,1,2,3"), "List of ciphering algorithms included in UE capabilities") + ("nas.enable_emergency_reg", bpo::value(&args->stack.nas_5g.emergency_registration)->default_value(false), "Specifies if it is an anonymous emergency registration.") ("pcap.enable", bpo::value(&args->stack.pkt_trace.enable)->default_value("none"), "Enable (MAC, MAC_NR, NAS) packet captures for wireshark") ("pcap.mac_filename", bpo::value(&args->stack.pkt_trace.mac_pcap.filename)->default_value("/tmp/ue_mac.pcap"), "MAC layer capture filename") diff --git a/srsue/src/stack/upper/nas_5g.cc b/srsue/src/stack/upper/nas_5g.cc index 1f8ac1ec1b..0fc2ffb057 100644 --- a/srsue/src/stack/upper/nas_5g.cc +++ b/srsue/src/stack/upper/nas_5g.cc @@ -249,9 +249,9 @@ int nas_5g::write_pdu(srsran::unique_byte_buffer_t pdu) /******************************************************************************* * Senders ******************************************************************************/ - int nas_5g::send_registration_request() { + unique_byte_buffer_t pdu = srsran::make_byte_buffer(); if (!pdu) { logger.error("Couldn't allocate PDU in %s().", __FUNCTION__); @@ -259,13 +259,21 @@ int nas_5g::send_registration_request() } initial_registration_request_stored.hdr.extended_protocol_discriminator = - nas_5gs_hdr::extended_protocol_discriminator_opts::extended_protocol_discriminator_5gmm; + nas_5gs_hdr::extended_protocol_discriminator_opts::extended_protocol_discriminator_5gmm; registration_request_t& reg_req = initial_registration_request_stored.set_registration_request(); - reg_req.registration_type_5gs.follow_on_request_bit = - registration_type_5gs_t::follow_on_request_bit_type_::options::follow_on_request_pending; + registration_type_5gs_t::follow_on_request_bit_type_::options::follow_on_request_pending; + + if(cfg.emergency_registration){ + reg_req.registration_type_5gs.registration_type = + registration_type_5gs_t::registration_type_type_::options::emergency_registration; + + mobile_identity_5gs_t::imei_s& imei = reg_req.mobile_identity_5gs.set_imei(); + usim->get_imei_vec(imei.imei.data(), 15); + } + else { reg_req.registration_type_5gs.registration_type = - registration_type_5gs_t::registration_type_type_::options::initial_registration; + registration_type_5gs_t::registration_type_type_::options::initial_registration; mobile_identity_5gs_t::suci_s& suci = reg_req.mobile_identity_5gs.set_suci(); suci.supi_format = mobile_identity_5gs_t::suci_s::supi_format_type_::options::imsi; usim->get_home_mcc_bytes(suci.mcc.data(), suci.mcc.size()); @@ -274,15 +282,15 @@ int nas_5g::send_registration_request() suci.scheme_output.resize(5); usim->get_home_msin_bcd(suci.scheme_output.data(), 5); logger.info("Requesting IMSI attach (IMSI=%s)", usim->get_imsi_str().c_str()); + } reg_req.ue_security_capability_present = true; fill_security_caps(reg_req.ue_security_capability); if (initial_registration_request_stored.pack(pdu) != SRSASN_SUCCESS) { - logger.error("Failed to pack registration request"); - return SRSRAN_ERROR; + logger.error("Failed to pack registration request"); + return SRSRAN_ERROR; } - if (pcap != nullptr) { pcap->write_nas(pdu.get()->msg, pdu.get()->N_bytes); } @@ -582,13 +590,14 @@ int nas_5g::send_pdu_session_establishment_request(uint32_t tran ul_nas_msg.pdu_session_id.pdu_session_identity_2_value = pdu_session_id; ul_nas_msg.request_type_present = true; - ul_nas_msg.request_type.request_type_value = request_type_t::Request_type_value_type_::options::initial_request; + ul_nas_msg.request_type.request_type_value = (cfg.emergency_registration)? request_type_t::Request_type_value_type_::initial_emergency_request: + request_type_t::Request_type_value_type_::options::initial_request; - ul_nas_msg.s_nssai_present = true; + ul_nas_msg.s_nssai_present = (cfg.emergency_registration)? false:true; ul_nas_msg.s_nssai.type = s_nssai_t::SST_type_::options::sst; ul_nas_msg.s_nssai.sst = 1; - ul_nas_msg.dnn_present = true; + ul_nas_msg.dnn_present = (cfg.emergency_registration)? false:true; ul_nas_msg.dnn.dnn_value.resize(pdu_session_cfg.apn_name.size() + 1); ul_nas_msg.dnn.dnn_value.data()[0] = static_cast(pdu_session_cfg.apn_name.size()); diff --git a/srsue/src/stack/upper/nas_5g_procedures.cc b/srsue/src/stack/upper/nas_5g_procedures.cc index 0d388a18f5..15e4089448 100644 --- a/srsue/src/stack/upper/nas_5g_procedures.cc +++ b/srsue/src/stack/upper/nas_5g_procedures.cc @@ -65,11 +65,7 @@ srsran::proc_outcome_t nas_5g::pdu_session_establishment_procedure::init(const u srsran::proc_outcome_t nas_5g::pdu_session_establishment_procedure::react( const srsran::nas_5g::pdu_session_establishment_accept_t& pdu_session_est_accept) { - // TODO check the pdu session values - if (pdu_session_est_accept.dnn_present == false) { - logger.warning("Expected DNN in PDU session establishment accept"); - return proc_outcome_t::error; - } + if (pdu_session_est_accept.pdu_address_present == false) { logger.warning("Expected PDU Address in PDU session establishment accept"); return proc_outcome_t::error; @@ -98,4 +94,4 @@ srsran::proc_outcome_t nas_5g::pdu_session_establishment_procedure::step() return srsran::proc_outcome_t::success; } -} // namespace srsue \ No newline at end of file +} // namespace srsue