Validate MEC simulator for UETAG

simu/data/ue_information_list.csv

 appInst,ueTag,address,state
 appInst01,UeTagA,acr:192.0.0.1,UNREGISTERED
-appInst01,UeTagC,acr:192.0.0.3,UNREGISTERED
+appInst01,UeTagC,acr:192.0.0.3,INVALID_STATE
 appInst02,UeTagB,acr:192.0.0.2,UNREGISTERED
 appInst03,UeTagD,acr:192.0.0.4,UNREGISTERED
 appInst03,UeTagE,acr:192.0.0.5,UNREGISTERED

simu/mec_database.py

@@ -212,13 +212,15 @@ class mec_database:
     def registerUEidentity(self, p_app_inst, p_json_msg):
         print(">>> registerUEidentity", p_json_msg)
         if p_json_msg["state"] != "REGISTERED" and p_json_msg["state"] != "UNREGISTERED":
-            return None
+            return '400 Bad Request'
         resp = None
         try:
             # Check the record exists
             r = tuple(self.__ue_information_list__.loc[p_app_inst, p_json_msg["ueIdentityTag"]])
             print("registerUEidentity: Find zoneId for appInst: ", p_app_inst, ", r= ", r)
-            self.__ue_information_list__.loc[p_app_inst, p_json_msg["ueIdentityTag"]]['state']  = p_json_msg["state"]
+            if self.__ue_information_list__.loc[p_app_inst, p_json_msg["ueIdentityTag"]]['state'] == 'INVALID_STATE':
+                return '412 Precondition Failed'
+            self.__ue_information_list__.loc[p_app_inst, p_json_msg["ueIdentityTag"]]['state'] = p_json_msg["state"]
             l = (p_json_msg["ueIdentityTag"], p_json_msg["state"])
             resp = self.__to_ueIdentityTagInfo__(p_json_msg["ueIdentityTag"], l)
         except KeyError:

simu/mec_http_server.py

@@ -96,12 +96,20 @@ class myHandler(http.server.BaseHTTPRequestHandler):
         else:
             if resp.find('Not Found') != -1:
                 self.send_response(404, 'Not Found')
+                resp = ""
             elif resp.find('Forbidden') != -1:
                 self.send_response(403, 'Forbidden')
+                resp = ""
             elif resp.find('Bad Request') != -1:
                 self.send_response(400, 'Bad Request')
+                resp = ""
+            elif resp.find('Precondition Failed') != -1:
+                self.send_response(412, 'Precondition Failed')
+                resp = "{\"problemDetails\": {\t\"type\": \"Precondition Failed\",\t\"title\": \"N/A\",\t\"status\": 412,\t\"detail\": \"Wrong preconditions\",\t\"instance\": \"N/A\"}}"
+                content_type = 'application/problem+json'
             elif resp.find('userTrackingSubscription') != -1:
                 self.send_response(201, 'Created')
+                resp = ""
             else:
                 self.send_response(200, 'OK')
             self.send_header('Host', self.headers.get('Host')) # send_header() shall be after send_response()

simu/mec_simulator.py

@@ -8,9 +8,9 @@ import sys, os, time
 import msvcrt
 
 # MEC simulator IPv4 address
-#ADDRESS_BINDING = '172.28.4.87'
+ADDRESS_BINDING = '172.28.4.87'
 #ADDRESS_BINDING = '192.168.1.21'
-ADDRESS_BINDING = '192.168.0.17'
+#ADDRESS_BINDING = '192.168.0.17'
 #ADDRESS_BINDING = '127.0.0.1'
 # MEC simulator IPv4 listening port
 PORT_NUMBER = 8081