Add IEs to support UE Rel 16

src/smf_app/smf_app.hpp

@@ -213,6 +213,16 @@ class smf_app {
       protocol_configuration_options_t& pco_resp,
       const pco_protocol_or_container_id_t* const poc_id);
 
+  /*
+   * process_pco_selected_bearer_control_mode
+   * @param [protocol_configuration_options_t &] pco_resp
+   * @param [pco_protocol_or_container_id_t *const] proc_id
+   * @return
+   */
+  int process_pco_selected_bearer_control_mode(
+      protocol_configuration_options_t& pco_resp,
+      const pco_protocol_or_container_id_t* const poc_id);
+
  public:
   explicit smf_app(const std::string& config_file);
   smf_app(smf_app const&) = delete;

src/smf_app/smf_context.cpp

@@ -1514,7 +1514,10 @@ void smf_context::handle_pdu_session_create_sm_context_request(
       .ci_ip_address_allocation_via_nas_signalling = 0,
       .ci_ipv4_address_allocation_via_dhcpv4       = 0,
       .ci_ipv4_link_mtu_request                    = 0,
-      .ci_dns_server_ipv6_address_request          = 0};
+      .ci_dns_server_ipv6_address_request          = 0,
+      .ci_ipv6_p_cscf_request                      = 0,
+      .ci_ipv4_p_cscf_request                      = 0,
+      .ci_selected_bearer_control_mode             = 0};
 
   smf_app_inst->process_pco_request(pco_req, pco_resp, pco_ids);
   sm_context_resp_pending->res.set_epco(pco_resp);

src/smf_app/smf_n1.cpp

@@ -153,7 +153,8 @@ bool smf_n1::create_n1_pdu_session_establishment_accept(
     return false;
   }
 
-  sm_msg->pdu_session_establishment_accept.presence = 0x038a;
+  sm_msg->pdu_session_establishment_accept.presence =
+      0x039a;  // Update Presence when adding a new IE
   if (static_cast<uint8_t>(sm_cause) > 0) {
     sm_msg->pdu_session_establishment_accept.presence = 0x039b;
     sm_msg->pdu_session_establishment_accept._5gsmcause =
@@ -217,9 +218,9 @@ bool smf_n1::create_n1_pdu_session_establishment_accept(
       sm_msg->pdu_session_establishment_accept.snssai.sd,
       sm_msg->pdu_session_establishment_accept.snssai.sd);
 
-  // TODO: AlwaysonPDUSessionIndication
-  // sm_msg->pdu_session_establishment_accept.alwaysonpdusessionindication.apsi_indication
-  // = ALWAYSON_PDU_SESSION_REQUIRED;
+  // AlwaysonPDUSessionIndication
+  sm_msg->pdu_session_establishment_accept.alwaysonpdusessionindication
+      .apsi_indication = ALWAYSON_PDU_SESSION_REQUIRED;
 
   // TODO: MappedEPSBearerContexts
   // TODO: EAPMessage

src/smf_app/smf_pco.cpp

@@ -386,6 +386,23 @@ int smf_app::process_pco_p_cscf_v6_request(
   return pco_push_protocol_or_container_id(pco_resp, &poc_id_resp);
 }
 
+//------------------------------------------------------------------------------
+int smf_app::process_pco_selected_bearer_control_mode(
+    protocol_configuration_options_t& pco_resp,
+    const pco_protocol_or_container_id_t* const poc_id) {
+  pco_protocol_or_container_id_t poc_id_resp = {0};
+  uint8_t value;
+
+  Logger::smf_app().debug(
+      "PCO: Protocol identifier Selected Bearer Control Mode");
+  poc_id_resp.protocol_id =
+      PCO_CONTAINER_IDENTIFIER_SELECTED_BEARER_CONTROL_MODE;
+  poc_id_resp.length_of_protocol_id_contents = 1;
+  value                            = 0x02;  // MS/NW mode, hardcoded for now
+  poc_id_resp.protocol_id_contents = std::to_string(value);
+  return pco_push_protocol_or_container_id(pco_resp, &poc_id_resp);
+}
+
 //------------------------------------------------------------------------------
 int smf_app::process_pco_request(
     const protocol_configuration_options_t& pco_req,
@@ -446,6 +463,11 @@ int smf_app::process_pco_request(
             pco_resp, &pco_req.protocol_or_container_ids[id]);
         pco_ids.ci_ipv4_p_cscf_request = true;
         break;
+      case PCO_CONTAINER_IDENTIFIER_SELECTED_BEARER_CONTROL_MODE:
+        process_pco_selected_bearer_control_mode(
+            pco_resp, &pco_req.protocol_or_container_ids[id]);
+        pco_ids.ci_selected_bearer_control_mode = true;
+        break;
       default:
         Logger::smf_app().warn(
             "PCO: Protocol/container identifier 0x%04X not supported now",

src/smf_app/smf_pco.hpp

@@ -50,6 +50,7 @@ typedef struct protocol_configuration_options_ids_s {
   uint8_t ci_dns_server_ipv6_address_request : 1;
   uint8_t ci_ipv6_p_cscf_request : 1;
   uint8_t ci_ipv4_p_cscf_request : 1;
+  uint8_t ci_selected_bearer_control_mode : 1;
 } protocol_configuration_options_ids_t;
 
 #endif