Merge branch 'nwi_support' into 'develop'

optional nwi handling

See merge request oai/cn5g/oai-cn5g-smf!88

etc/smf.conf

@@ -89,6 +89,7 @@ SMF =
                                                         # but you may need to set to yes for UE that do not explicitly request a PDN address through NAS signalling
       USE_LOCAL_SUBSCRIPTION_INFO = "yes";  # Set to yes if SMF uses local subscription information instead of from an UDM
       USE_FQDN_DNS = "@USE_FQDN_DNS@";                  # Set to yes if AMF/UDM/NRF/UPF will relying on a DNS to resolve FQDN
+      USE_NETWORK_INSTANCE = "@USE_NETWORK_INSTANCE@"   # Set yes if network instance is to be used for given UPF
     }  
   
     AMF :
@@ -116,8 +117,8 @@ SMF =
     };
         
     UPF_LIST = (
-         {IPV4_ADDRESS = "@UPF_IPV4_ADDRESS@" ; FQDN = "@UPF_FQDN_0@"}   # YOUR UPF CONFIG HERE
-    );   
+         {IPV4_ADDRESS = "@UPF_IPV4_ADDRESS@" ; FQDN = "@UPF_FQDN_0@"; NWI_LIST = ({DOMAIN_ACCESS  = "@DOMAIN_ACCESS@", DOMAIN_CORE = "@DOMAIN_CORE@"})}   # YOUR UPF CONFIG HERE
+    );                                                               # NWI_LIST IS OPTIONAL PARAMETER    
    
     LOCAL_CONFIGURATION :
     {

scripts/entrypoint.sh

@@ -5,6 +5,11 @@ set -euo pipefail
 CONFIG_DIR="/openair-smf/etc"
 
 # Default values
+# (Default NWI Domain for all UPFs in OAI-Integration)
+USE_NETWORK_INSTANCE=${USE_NETWORK_INSTANCE:-no}
+DOMAIN_ACCESS=${DOMAIN_ACCESS:-access.oai.org}
+DOMAIN_CORE=${DOMAIN_CORE:-core.oai.org}
+
 if [[ ${USE_FQDN_DNS} == "yes" ]];then
     AMF_IPV4_ADDRESS=${AMF_IPV4_ADDRESS:-0.0.0.0}
     NRF_IPV4_ADDRESS=${NRF_IPV4_ADDRESS:-0.0.0.0}

src/smf_app/smf_config.cpp

@@ -599,6 +599,14 @@ int smf_config::load(const string& config_file) {
         use_fqdn_dns = false;
       }
 
+      support_features.lookupValue(
+          SMF_CONFIG_STRING_SUPPORT_FEATURES_USE_NETWORK_INSTANCE, opt);
+      if (boost::iequals(opt, "yes")) {
+        use_nwi = true;
+      } else {
+        use_nwi = false;
+      }
+
     } catch (const SettingNotFoundException& nfex) {
       Logger::smf_app().error(
           "%s : %s, using defaults", nfex.what(), nfex.getPath());
@@ -703,10 +711,11 @@ int smf_config::load(const string& config_file) {
         const Setting& upf_cfg = upf_list_cfg[i];
         // TODO FQDN
         string address    = {};
+        pfcp::node_id_t n = {};
         if (!use_fqdn_dns) {
           if (upf_cfg.lookupValue(
                   SMF_CONFIG_STRING_UPF_IPV4_ADDRESS, address)) {
-            pfcp::node_id_t n = {};
+            // pfcp::node_id_t n = {};
             n.node_id_type = pfcp::NODE_ID_TYPE_IPV4_ADDRESS;  // actually
             if (inet_pton(AF_INET, util::trim(address).c_str(), buf_in_addr) ==
                 1) {
@@ -736,7 +745,7 @@ int smf_config::load(const string& config_file) {
             // TODO:
             throw("DO NOT SUPPORT IPV6 ADDR FOR NRF!");
           } else {  // IPv4
-            pfcp::node_id_t n = {};
+            // pfcp::node_id_t n = {};
             n.node_id_type = pfcp::NODE_ID_TYPE_IPV4_ADDRESS;  // actually
             n.fqdn         = astring;
             if (inet_pton(AF_INET, util::trim(address).c_str(), buf_in_addr) ==
@@ -752,6 +761,25 @@ int smf_config::load(const string& config_file) {
             upfs.push_back(n);
           }
         }
+        // Network Instance
+        if (upf_cfg.exists(SMF_CONFIG_STRING_NWI_LIST) & use_nwi) {
+          const Setting& nwi_cfg = upf_cfg[SMF_CONFIG_STRING_NWI_LIST];
+          count                  = nwi_cfg.getLength();
+          // Check if NWI list for given UPF is present
+          if (count > 0) {
+            upf_nwi_list_t upf_nwi;
+            nwi_cfg[0].lookupValue(
+                SMF_CONFIG_STRING_DOMAIN_ACCESS, upf_nwi.domain_access);
+            nwi_cfg[0].lookupValue(
+                SMF_CONFIG_STRING_DOMAIN_CORE, upf_nwi.domain_core);
+            upf_nwi.upf_id = n;
+            Logger::smf_app().debug(
+                "NWI config found for UP node:-\t Nwi access: %s , \t Nwi "
+                "core: %s",
+                upf_nwi.domain_access.c_str(), upf_nwi.domain_core.c_str());
+            upf_nwi_list.push_back(upf_nwi);
+          }
+        }
       }
     }
 
@@ -1014,6 +1042,8 @@ void smf_config::display() {
       "    Push PCO (DNS+MTU).........: %s", force_push_pco ? "Yes" : "No");
   Logger::smf_app().info(
       "    Use FQDN ..................: %s", use_fqdn_dns ? "Yes" : "No");
+  Logger::smf_app().info(
+      "    Use NWI  ..................: %s", use_nwi ? "Yes" : "No");
 
   Logger::smf_app().info("- AMF:");
   Logger::smf_app().info(
@@ -1182,3 +1212,33 @@ std::string smf_config::get_default_dnn() {
   Logger::smf_app().debug("Default DNN: %s", smf_cfg.dnn[0].dnn.c_str());
   return smf_cfg.dnn[0].dnn;
 }
+
+//------------------------------------------------------------------------------
+bool smf_config::get_nwi_list_index(
+    bool nwi_enabled, uint8_t nwi_list_index, pfcp::node_id_t node_id) {
+  Logger::smf_app().debug("Default DNN: %s", smf_cfg.dnn[0].dnn.c_str());
+  // return smf_cfg.dnn[0].dnn;
+  if (node_id.node_id_type == pfcp::NODE_ID_TYPE_IPV4_ADDRESS) {
+    for (int i = 0; i < upf_nwi_list.size(); i++) {
+      if (node_id.u1.ipv4_address.s_addr ==
+          upf_nwi_list[i].upf_id.u1.ipv4_address.s_addr) {
+        nwi_list_index = i;
+        nwi_enabled    = true;
+        return true;
+      }
+    }
+    nwi_enabled = false;
+    return false;
+  }
+  if (node_id.node_id_type == pfcp::NODE_ID_TYPE_FQDN) {
+    for (int i = 0; i < upf_nwi_list.size(); i++) {
+      if (node_id.fqdn == upf_nwi_list[i].upf_id.fqdn) {
+        nwi_list_index = i;
+        nwi_enabled    = true;
+        return true;
+      }
+    }
+    nwi_enabled = false;
+    return false;
+  }
+}
\ No newline at end of file

src/smf_app/smf_config.hpp

@@ -111,6 +111,11 @@
 #define SMF_CONFIG_STRING_NRF_IPV4_ADDRESS "IPV4_ADDRESS"
 #define SMF_CONFIG_STRING_NRF_PORT "PORT"
 
+#define SMF_CONFIG_STRING_NWI_LIST "NWI_LIST"
+#define SMF_CONFIG_STRING_DOMAIN_ACCESS "DOMAIN_ACCESS"
+#define SMF_CONFIG_STRING_DOMAIN_CORE "DOMAIN_CORE"
+#define SMF_CONFIG_STRING_DOMAIN_SGI_LAN "DOMAIN_SGI_LAN"
+
 #define SMF_CONFIG_STRING_LOCAL_CONFIGURATION "LOCAL_CONFIGURATION"
 #define SMF_CONFIG_STRING_SESSION_MANAGEMENT_SUBSCRIPTION_LIST                 \
   "SESSION_MANAGEMENT_SUBSCRIPTION_LIST"
@@ -139,6 +144,8 @@
 #define SMF_CONFIG_STRING_NAS_FORCE_PUSH_PCO                                   \
   "FORCE_PUSH_PROTOCOL_CONFIGURATION_OPTIONS"
 #define SMF_CONFIG_STRING_SUPPORT_FEATURES_USE_FQDN_DNS "USE_FQDN_DNS"
+#define SMF_CONFIG_STRING_SUPPORT_FEATURES_USE_NETWORK_INSTANCE                \
+  "USE_NETWORK_INSTANCE"
 
 #define SMF_MAX_ALLOCATED_PDN_ADDRESSES 1024
 
@@ -221,6 +228,7 @@ class smf_config {
   bool discover_upf;
   bool use_local_subscription_info;
   bool use_fqdn_dns;
+  bool use_nwi;
 
   struct {
     struct in_addr ipv4_addr;
@@ -245,6 +253,18 @@ class smf_config {
     std::string fqdn;
   } nrf_addr;
 
+  // Network instance
+  // bool network_instance_configuration;
+  struct upf_nwi_list_s {
+    pfcp::node_id_t upf_id;
+    std::string domain_access;
+    std::string domain_core;
+    //      std::string domain_sgi_lan;
+  };
+  typedef struct upf_nwi_list_s upf_nwi_list_t;
+
+  std::vector<upf_nwi_list_t> upf_nwi_list;
+
 #define SMF_NUM_SESSION_MANAGEMENT_SUBSCRIPTION_MAX 10
   struct {
     snssai_t single_nssai;
@@ -338,6 +358,8 @@ class smf_config {
   bool is_dotted_dnn_handled(
       const std::string& dnn, const pdu_session_type_t& pdn_session_type);
   std::string get_default_dnn();
+  bool get_nwi_list_index(
+      bool nwi_enabled, uint8_t nwi_list_index, pfcp::node_id_t node_id);
 };
 
 }  // namespace smf

src/smf_app/smf_procedure.cpp

@@ -153,6 +153,15 @@ int session_create_sm_context_procedure::run(
   cp_fseid.seid = sps->seid;
   n4_triggered->pfcp_ies.set(cp_fseid);
 
+  //-------------------
+  // IE network instance
+  //-------------------
+  bool nwi_list_present  = false;
+  uint8_t nwi_list_index = 0;
+  if (smf_cfg.get_nwi_list_index(nwi_list_present, nwi_list_index, node_id) &
+      smf_cfg.use_nwi)
+    nwi_list_present = true;
+
   //*******************
   // UPLINK
   //*******************
@@ -173,7 +182,14 @@ int session_create_sm_context_procedure::run(
   destination_interface.interface_value =
       pfcp::INTERFACE_VALUE_CORE;  // ACCESS is for downlink, CORE for uplink
   forwarding_parameters.set(destination_interface);
-  // TODO: Network Instance
+
+  if (nwi_list_present) {
+    pfcp::network_instance_t network_instance = {};
+    network_instance.network_instance =
+        smf_cfg.upf_nwi_list[nwi_list_index].domain_core;
+    forwarding_parameters.set(network_instance);
+  }
+
   // TODO: Redirect Information
   // TODO: Outer Header Creation (e.g., in case of N9)
 
@@ -220,6 +236,13 @@ int session_create_sm_context_procedure::run(
   // Session Establishment Request, 3GPP TS 29.244 V16.0.0)  source interface
   source_interface.interface_value = pfcp::INTERFACE_VALUE_ACCESS;
   pdi.set(source_interface);
+
+  if (nwi_list_present) {
+    pfcp::network_instance_t network_instance = {};
+    network_instance.network_instance = smf_cfg.upf_nwi_list[0].domain_access;
+    pdi.set(network_instance);
+  }
+
   // CN tunnel info
   local_fteid.ch =
       1;  // SMF requests the UPF to assign a local F-TEID to the PDR
@@ -546,6 +569,15 @@ int session_update_sm_context_procedure::run(
     }
   */
 
+  //-------------------
+  // IE network instance
+  //-------------------
+  bool nwi_list_present  = false;
+  uint8_t nwi_list_index = 0;
+  if (smf_cfg.get_nwi_list_index(nwi_list_present, nwi_list_index, up_node_id) &
+      smf_cfg.use_nwi)
+    nwi_list_present = true;
+
   //-------------------
   n11_trigger           = sm_context_req;
   n11_triggered_pending = sm_context_resp;
@@ -679,6 +711,12 @@ int session_update_sm_context_procedure::run(
           destination_interface.interface_value =
               pfcp::INTERFACE_VALUE_ACCESS;  // ACCESS is for downlink, CORE for
                                              // uplink
+          if (nwi_list_present) {
+            pfcp::network_instance_t network_instance = {};
+            network_instance.network_instance =
+                smf_cfg.upf_nwi_list[0].domain_access;
+            forwarding_parameters.set(network_instance);
+          }
           forwarding_parameters.set(destination_interface);
           outer_header_creation.outer_header_creation_description =
               OUTER_HEADER_CREATION_GTPU_UDP_IPV4;
@@ -731,7 +769,13 @@ int session_update_sm_context_procedure::run(
           // pfcp::framed_routing_t           framed_routing = {};
           // pfcp::framed_ipv6_route_t        framed_ipv6_route = {};
           source_interface.interface_value = pfcp::INTERFACE_VALUE_CORE;
-
+          if (nwi_list_present) {
+            pfcp::network_instance_t network_instance =
+                {};  // mandatory for travelping
+            network_instance.network_instance =
+                smf_cfg.upf_nwi_list[0].domain_core;
+            pdi.set(network_instance);
+          }
           // local_fteid.from_core_fteid(qos_flow.qos_flow.dl_fteid);
           if (sps->ipv4) {
             ue_ip_address.v4 = 1;
@@ -813,6 +857,13 @@ int session_update_sm_context_procedure::run(
           precedence.precedence = flow.precedence.precedence;
 
           source_interface.interface_value = pfcp::INTERFACE_VALUE_CORE;
+          if (nwi_list_present) {
+            pfcp::network_instance_t network_instance =
+                {};  // mandatory for travelping
+            network_instance.network_instance =
+                smf_cfg.upf_nwi_list[0].domain_core;
+            pdi.set(network_instance);
+          }
           pdi.set(source_interface);
           pdi.set(ue_ip_address);