added extended status, added nid to set_key, made slac complete. Connection to Ioniq works.

pyPlc.py

@@ -26,8 +26,15 @@ def inkey():
 def cbAddToTrace(s):
     print(s)
 
-def cbShowStatus(s):
+def cbShowStatus(s, selection=""):
-    print(s)
+    #print(s)
+    if (selection == "mode"):
+        lblMode['text']=s
+        s=""
+    if (selection == "pevmac"):
+        lblPevMac['text']=s
+        s=""
+    if (len(s)>0):
         lblStatus['text']=s
     root.update()
 
@@ -39,6 +46,11 @@ lblHelp = tk.Label(root, text="x=exit, t=testframe")
 lblHelp.pack()
 lblStatus = tk.Label(root, text="(Status)")
 lblStatus.pack()
+lblPevMac = tk.Label(root, text="(pev mac)")
+lblPevMac.pack()
+lblMode = tk.Label(root, text="(mode)")
+lblMode.pack()
+
 # Bind the keyboard handler to all relevant elements:
 display.bind('<Key>', storekeyname)
 root.bind('<Key>', storekeyname)

pyPlcHomeplug.py

@@ -46,10 +46,16 @@ def showAsHex(mybytearray):
         strHex = strHex + twoCharHex(mybytearray[i]) + " "
     print("len " + str(packetlength) + " data " + strHex)
 
+def prettyMac(macByteArray):
+    s=""
+    for i in range(0, 5):
+       s = s + twoCharHex(macByteArray[i]) + ":"
+    s = s + twoCharHex(macByteArray[i])
+    return s
+
 MAC_BROADCAST = [0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF ]
 MAC_LAPTOP    = [0xdc, 0x0e, 0xa1, 0x11, 0x67, 0x08 ]
 MAC_RANDOM    = [0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff ]
-MAC_IONIQ     = [0x04, 0x65, 0x65, 0x00, 0x64, 0xC3 ]
 MAC_ALPI      = [0x0A, 0x19, 0x4A, 0x39, 0xD6, 0x98 ] # alpitronics
 MAC_TPLINK_E4 = [0x98, 0x48, 0x27, 0x5A, 0x3C, 0xE4 ] # TPlink PLC adaptor
 MAC_TPLINK_E6 = [0x98, 0x48, 0x27, 0x5A, 0x3C, 0xE6 ] # TPlink PLC adaptor
@@ -117,7 +123,7 @@ class pyPlcHomeplug():
             protocol=mybytearray[12]*256 + mybytearray[13]
             if (protocol == 0x88E1):
                 blIsHomePlug=True
-                print("HomePlug protocol")
+                # print("HomePlug protocol")
         return blIsHomePlug
         
     def fillSourceMac(self, mac, offset=6): # at offset 6 in the ethernet frame, we have the source MAC
@@ -141,7 +147,7 @@ class pyPlcHomeplug():
 
     def setNidAt(self, index):
         # (b0f2e695666b03 was NID of TPlink)
-        # copies the network ID (NID) into the wished position in the transmit buffer
+        # copies the network ID (NID, 7 bytes) into the wished position in the transmit buffer
         for i in range(0, 7):
             self.mytransmitbuffer[index+i]=self.NID[i]
         
@@ -206,7 +212,10 @@ class pyPlcHomeplug():
         self.mytransmitbuffer[30]=0x00 # 11
         self.mytransmitbuffer[31]=0x00 # 12 pmn
         self.mytransmitbuffer[32]=0x00 # 13 cco cap
-        #self.setNidAt(33) # 14-20 nid  7 bytes from 33 to 39
+        self.setNidAt(33) # 14-20 nid  7 bytes from 33 to 39
+                            # Network ID to be associated with the key distributed herein.
+                            # The 54 LSBs of this field contain the NID (refer to Section 3.4.3.1). The
+                            # two MSBs shall be set to 0b00.
         self.mytransmitbuffer[40]=0x01 # 21 peks (payload encryption key select) Table 11-83. 01 is NMK. We had 02 here, why???
                                        # with 0x0F we could choose "no key, payload is sent in the clear"
         self.setNmkAt(41) 
@@ -256,7 +265,7 @@ class pyPlcHomeplug():
         # Destination MAC
         self.fillDestinationMac(MAC_BROADCAST)
         # Source MAC
-        self.fillSourceMac(MAC_IONIQ)
+        self.fillSourceMac(self.pevMac)
         # Protocol
         self.mytransmitbuffer[12]=0x88 # Protocol HomeplugAV
         self.mytransmitbuffer[13]=0xE1
@@ -281,7 +290,7 @@ class pyPlcHomeplug():
         self.mytransmitbuffer = bytearray(60)
         self.cleanTransmitBuffer()
         # Destination MAC
-        self.fillDestinationMac(MAC_IONIQ)
+        self.fillDestinationMac(self.pevMac)
         # Source MAC
         self.fillSourceMac(MAC_RANDOM)
         # Protocol
@@ -301,14 +310,76 @@ class pyPlcHomeplug():
         self.mytransmitbuffer[25]=0x0A # sound count
         self.mytransmitbuffer[26]=0x06 # timeout
         self.mytransmitbuffer[27]=0x01 # resptype
-        self.fillDestinationMac(MAC_IONIQ, 28)  # forwarding_sta, same as PEV MAC, plus 2 bytes 00 00
+        self.fillDestinationMac(self.pevMac, 28)  # forwarding_sta, same as PEV MAC, plus 2 bytes 00 00
         self.mytransmitbuffer[34]=0x00 # 
         self.mytransmitbuffer[35]=0x00 # 
-        self.fillDestinationMac(MAC_IONIQ, 36)  # runid, same as PEV MAC, plus 2 bytes 00 00 
+        self.fillDestinationMac(self.pevMac, 36)  # runid, same as PEV MAC, plus 2 bytes 00 00 
         self.mytransmitbuffer[42]=0x0 # 
         self.mytransmitbuffer[43]=0x0 #
         # rest is 00
         
+    def composeAttenCharInd(self):
+        self.mytransmitbuffer = bytearray(129)
+        self.cleanTransmitBuffer()
+        # Destination MAC
+        self.fillDestinationMac(self.pevMac)
+        # Source MAC
+        self.fillSourceMac(MAC_RANDOM)
+        # Protocol
+        self.mytransmitbuffer[12]=0x88 # Protocol HomeplugAV
+        self.mytransmitbuffer[13]=0xE1
+        self.mytransmitbuffer[14]=0x01 # version
+        self.mytransmitbuffer[15]=0x6E # ATTEN_CHAR.IND
+        self.mytransmitbuffer[16]=0x60 # 
+        self.mytransmitbuffer[17]=0x00 # 2 bytes fragmentation information. 0000 means: unfragmented.
+        self.mytransmitbuffer[18]=0x00 # 
+        self.mytransmitbuffer[19]=0x00 # apptype
+        self.mytransmitbuffer[20]=0x00 # security
+        self.fillDestinationMac(self.pevMac, 21) # The wireshark calls it source_mac, but alpitronic fills it with PEV mac. We use the PEV MAC.
+        self.fillDestinationMac(self.pevMac, 27) # runid. The alpitronic fills it with the PEV mac, plus 00 00.
+        self.mytransmitbuffer[35]=0x00 # 35 - 51 source_id, 17 bytes. The alpitronic fills it with 00
+        
+        self.mytransmitbuffer[52]=0x00 # 52 - 68 response_id, 17 bytes. The alpitronic fills it with 00.
+        self.mytransmitbuffer[69]=0x0A # Number of sounds. 10 in normal case. Should this be more flexible, e.g. using the counter from first MNBC_SOUND?
+        self.mytransmitbuffer[70]=0x3A # Number of groups = 58. Should this be more flexible?
+        for i in range(71, 129):  # 71 to 128: The group attenuation for the 58 announced groups.
+            self.mytransmitbuffer[i]=9 # Typical values are between 1 and 0x19. Since we have no real measurements from the AR7020,
+                                          # we just simulate something. 0 seems to be interpreted as "defect", the IONIQ does not send
+                                          # a positive response in this case.
+        # higher attenuation for the higher frequencies, to be a little bit realistic (real data from alpitronic trace)
+        self.mytransmitbuffer[126]=0x0f
+        self.mytransmitbuffer[127]=0x13
+        self.mytransmitbuffer[128]=0x19
+        
+    def composeSlacMatchCnf(self):
+        self.mytransmitbuffer = bytearray(109)
+        self.cleanTransmitBuffer()
+        # Destination MAC
+        self.fillDestinationMac(self.pevMac)
+        # Source MAC
+        self.fillSourceMac(MAC_RANDOM)
+        # Protocol
+        self.mytransmitbuffer[12]=0x88 # Protocol HomeplugAV
+        self.mytransmitbuffer[13]=0xE1
+        self.mytransmitbuffer[14]=0x01 # version
+        self.mytransmitbuffer[15]=0x7D # SLAC_MATCH.CNF
+        self.mytransmitbuffer[16]=0x60 # 
+        self.mytransmitbuffer[17]=0x00 # 2 bytes fragmentation information. 0000 means: unfragmented.
+        self.mytransmitbuffer[18]=0x00 # 
+        self.mytransmitbuffer[19]=0x00 # apptype
+        self.mytransmitbuffer[20]=0x00 # security
+        self.mytransmitbuffer[21]=0x56 # length 2 byte
+        self.mytransmitbuffer[22]=0x00 # 
+                                       # 23 - 39: pev_id 17 bytes. All zero in alpi/Ioniq trace.
+        self.fillDestinationMac(self.pevMac, 40) # 40 - 45 pev_mac                               
+                                       # 46 - 62: evse_id 17 bytes. All zero in alpi/Ioniq trace.
+        self.fillSourceMac(MAC_RANDOM, 63) # 63 - 68 evse_mac 
+        self.fillDestinationMac(self.pevMac, 69) # 69-76 run_id. Is the ioniq mac plus 00 00.
+                                       # 77 to 84 reserved 0
+        self.setNidAt(85) # 85-91 NID. We can nearly freely choose this, but the upper two bits need to be zero
+                                       # 92 reserved 0                                 
+        self.setNmkAt(93) # 93 to 108 NMK. We can freely choose this. Normally we should use a random number. 
+        
     def composeDHCP(self):
 		# DHCP discover, to check whether this "normal" package arrives on the other side
         self.mytransmitbuffer = bytearray(379)
@@ -363,8 +434,8 @@ class pyPlcHomeplug():
             self.addToTrace("transmitting GetSwReq...")
             self.sniffer.sendpacket(bytes(self.mytransmitbuffer))
         if (selection=="s"):
-            self.composeSetKey(1)
+            self.composeSetKey(0)
-            self.addToTrace("transmitting SET_KEY.REQ (key 1)")
+            self.addToTrace("transmitting SET_KEY.REQ (key 0)")
             self.sniffer.sendpacket(bytes(self.mytransmitbuffer))
         if (selection=="t"):
             self.composeSetKey(2)
@@ -383,25 +454,66 @@ class pyPlcHomeplug():
         # The getkey response contains the Network ID (NID), even if the request was rejected. We store the NID,
         # to have it available for the next request.
         s = ""
-        for i in range(0, 7):
+        for i in range(0, 7): # NID has 7 bytes
             self.NID[i] = self.myreceivebuffer[29+i]
             s=s+hex(self.NID[i])+ " "
         print("From GetKeyCnf, got network ID (NID) " + s)
 
+    def evaluateSetKeyCnf(self):
+        # The Setkey confirmation
+        # In spec, the result 0 means "success". But in reality, the 0 means: did not work. When it works,
+        # then the LEDs are blinking (device is restarting), and the response is 1.
+        result = self.myreceivebuffer[19]
+        if (result == 0):
+            self.addToTrace("SetKeyCnf says 0, this is a bad sign")
+        else:
+            self.addToTrace("SetKeyCnf says " + str(result) + ", this is formally 'rejected', but indeed ok.")
+
     def evaluateSlacParamReq(self):
         # We received a SLAC_PARAM request from the PEV. This is the initiation of a SLAC procedure.
+        # We extract the pev MAC from it.
+        
+        for i in range(0, 6):
+            self.pevMac[i] = self.myreceivebuffer[6+i]
+        self.showStatus(prettyMac(self.pevMac), "pevmac")
         # If we want to emulate an EVSE, we want to answer.
+        if (self.iAmEvse==1):
             self.composeSlacParamCnf()
             self.addToTrace("transmitting CM_SLAC_PARAM.CNF")
             self.sniffer.sendpacket(bytes(self.mytransmitbuffer))
             
+    def evaluateMnbcSoundInd(self):
+        # We received MNBC_SOUND.IND from the PEV. Normally this happens 10times, with a countdown (remaining number of sounds)
+        # running from 9 to 0. If the countdown is 0, this is the last message. In case we are the EVSE, we need
+        # to answer with a ATTEN_CHAR.IND, which normally contains the attenuation for 10 sounds, 58 groups.
+        if (self.iAmEvse==1):
+            countdown = self.myreceivebuffer[38]
+            if (countdown == 0):
+                self.composeAttenCharInd()
+                self.addToTrace("transmitting ATTEN_CHAR.IND")
+                self.sniffer.sendpacket(bytes(self.mytransmitbuffer))
+            
+    def evaluateSlacMatchReq(self):
+        # We received SLAC_MATCH.REQ from the PEV.
+        # If we are EVSE, we send the response.
+        if (self.iAmEvse==1):
+            self.composeSlacMatchCnf()
+            self.addToTrace("transmitting SLAC_MATCH.CNF")
+            self.sniffer.sendpacket(bytes(self.mytransmitbuffer))
+        
+  
     def evaluateSlacMatchCnf(self):
         # The SLAC_MATCH.CNF contains the NMK and the NID.
         # We extract this information, so that we can use it for the CM_SET_KEY afterwards.
         # References: https://github.com/qca/open-plc-utils/blob/master/slac/evse_cm_slac_match.c
         # 2021-12-16_HPC_säule1_full_slac.pcapng
+        if (self.iAmEvse==1):
+            # If we are EVSE, nothing to do. We have sent the match.CNF by our own.
+            # The SET_KEY was already done at startup.
+            pass
+        else:
             s = ""
-        for i in range(0, 7):
+            for i in range(0, 7): # NID has 7 bytes
                 self.NID[i] = self.myreceivebuffer[85+i]
                 s=s+hex(self.NID[i])+ " "
             print("From SlacMatchCnf, got network ID (NID) " + s)        
@@ -420,10 +532,16 @@ class pyPlcHomeplug():
         print(hex(mmt))
         if (mmt == CM_GET_KEY + MMTYPE_CNF):
             self.evaluateGetKeyCnf()
+        if (mmt == CM_SLAC_MATCH + MMTYPE_REQ):
+            self.evaluateSlacMatchReq()
         if (mmt == CM_SLAC_MATCH + MMTYPE_CNF):
             self.evaluateSlacMatchCnf()
         if (mmt == CM_SLAC_PARAM + MMTYPE_REQ):
             self.evaluateSlacParamReq()
+        if (mmt == CM_MNBC_SOUND + MMTYPE_IND):
+            self.evaluateMnbcSoundInd()
+        if (mmt == CM_SET_KEY + MMTYPE_CNF):
+            self.evaluateSetKeyCnf()
 
         
     def findEthernetAdaptor(self):
@@ -436,6 +554,19 @@ class pyPlcHomeplug():
                 self.strInterfaceName="eth"+str(i)
             print("eth"+ str(i) + " is " + strInterfaceName)
             
+    def enterPevMode(self):
+        self.iAmEvse = 0 # not emulating a charging station
+        self.iAmPev = 1 # emulating a vehicle
+        self.showStatus("PEV mode", "mode")
+    def enterEvseMode(self):
+        self.iAmEvse = 1 # not emulating a charging station
+        self.iAmPev = 0 # emulating a vehicle
+        self.showStatus("EVSE mode", "mode")
+    def enterListenMode(self):
+        self.iAmEvse = 0 # not emulating a charging station
+        self.iAmPev = 0 # emulating a vehicle
+        self.showStatus("LISTEN mode", "mode")        
+
     def __init__(self, callbackAddToTrace=None, callbackShowStatus=None):
         self.mytransmitbuffer = bytearray("Hallo das ist ein Test", 'UTF-8')
         self.nPacketsReceived = 0
@@ -461,20 +592,23 @@ class pyPlcHomeplug():
         self.sniffer.setnonblock(True)
         self.NMK = [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 ] # a default network key
         self.NID = [ 1, 2, 3, 4, 5, 6, 7 ] # a default network ID
+        self.pevMac = [0x55, 0x56, 0x57, 0x58, 0x59, 0x5A ] # a default pev MAC
         self.runningCounter=0
+        self.enterEvseMode()
+        self.showStatus(prettyMac(self.pevMac), "pevmac")
         print("sniffer created at " + self.strInterfaceName)
 
     def addToTrace(self, s):
         self.callbackAddToTrace(s)
 
-    def showStatus(self, s):
+    def showStatus(self, s, selection=""):
-        self.callbackShowStatus(s) 
+        self.callbackShowStatus(s, selection) 
         
     def mainfunction(self):  
         # print("will evaluate self.sniffer")
         for ts, pkt in self.sniffer: # attention: for using this in non-blocking manner, we need the patch described above.
             self.nPacketsReceived+=1
-            print('%d' % (ts))
+            # print('%d' % (ts)) # the time stamp
             if (self.isHomeplug(pkt)):
                 self.myreceivebuffer = pkt
                 #    self.showMacAddresses(pkt)

pyPlcWorker.py

@@ -18,8 +18,8 @@ class pyPlcWorker():
     def addToTrace(self, s):
         self.callbackAddToTrace(s)
         
-    def showStatus(self, s):
+    def showStatus(self, s, selection = ""):
-        self.callbackShowStatus(s)        
+        self.callbackShowStatus(s, selection)        
         
     def mainfunction(self):
         self.nMainFunctionCalls+=1
@@ -28,6 +28,13 @@ class pyPlcWorker():
         
     def handleUserAction(self, strAction):
         self.strUserAction = strAction
+        if (strAction == "P"):
+            self.hp.enterPevMode()
+        if (strAction == "E"):
+            self.hp.enterEvseMode()
+        if (strAction == "L"):
+            self.hp.enterListenMode()
+            
         self.addToTrace("UserAction " + strAction)
         self.hp.sendTestFrame(strAction)