# Preconditions: # Library pcap-ct (not libpcap, not pylibpcap, not pypcap) # # Version 2022-08-14: # - Selection of interfaces ok # - Sniffing of the SLAC-request ok # - Transmission of a demo message ok # # Test results 2022-10-15 # 1. GET_SW.REQ broadcast is answered by both TPlinks, while the first is connected to eth, the other via PLC at the first. # 2. Step 1 works also, if we use a different MAC address than the original laptop ethernet MAC. # 3. CM_SET_KEY addressed to the correct destination works, with the following results: # - there were cases, when the TPlink responded "negative", but with a "valid" none (each time it used a new mynonce, and correctly # reflected our mynonce. # - but also there is "positive" response, also with correct nonces. # - also the Devolo reponds positive and with correct nonces. # - not yet checked, whether the NMK is really set # 4. CM_GET_KEY with wrong NID is refused by the devolo. But at least it delivers the NID (e.g. d57c1fe9544e01), and if we use this NID in the next # request, it responds with KEY_GRANTED, Keytype=NMK, and a key 7f19ba0261892d59b7ea42aed875d2320000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 # This key delivers exactly the NMK, which we have set in the CM_SET_KEY. # But: There are some pitfalls: # The CM_SET_KEY responds in some cases (wrong request) positive, but does not apply the NMK. # If the CM_SET_KEY is well-formatted, including the correct NID, we get a false-negative response, and # we see the LEDs on the adaptor shortly going completely off, completely on, and back to normal state. This # is the sign, that the new key was accepted. It means, the # adaptor is making a reset, to apply the new key. # 5. CM_SET_KEY and CM_GET_KEY works also when sent to broadcast address. For both, devolo and tpLink. # 2022-10-18 further tests # 6. The devolo reports the SLAC_PARAM from the standalone-IONIQ to the wirkshark. Even in the case, when the devolo is paired to a tpLink. # 7. The tpLink does NOT report the SLAC_PARAM to ethernet. Bad. # 8. The tpLink has software from 2017, maybe the SLAC was removed at this version. # 9. Article regarding firmware- and configuration update: https://fitzcarraldoblog.wordpress.com/2020/07/22/updating-the-powerline-adapters-in-my-home-network/ import pcap import pyPlcIpv6 from helpers import * # prettyMac etc MAC_BROADCAST = [0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF ] MAC_LAPTOP = [0xdc, 0x0e, 0xa1, 0x11, 0x67, 0x08 ] # Win10 laptop MAC_RANDOM = [0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff ] 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 MAC_DEVOLO_26 = [0xBC, 0xF2, 0xAF, 0x0B, 0x8E, 0x26 ] # Devolo PLC adaptor CM_SET_KEY = 0x6008 CM_GET_KEY = 0x600C CM_SC_JOIN = 0x6010 CM_CHAN_EST = 0x6014 CM_TM_UPDATE = 0x6018 CM_AMP_MAP = 0x601C CM_BRG_INFO = 0x6020 CM_CONN_NEW = 0x6024 CM_CONN_REL = 0x6028 CM_CONN_MOD = 0x602C CM_CONN_INFO = 0x6030 CM_STA_CAP = 0x6034 CM_NW_INFO = 0x6038 CM_GET_BEACON = 0x603C CM_HFID = 0x6040 CM_MME_ERROR = 0x6044 CM_NW_STATS = 0x6048 CM_SLAC_PARAM = 0x6064 CM_START_ATTEN_CHAR = 0x6068 CM_ATTEN_CHAR = 0x606C CM_PKCS_CERT = 0x6070 CM_MNBC_SOUND = 0x6074 CM_VALIDATE = 0x6078 CM_SLAC_MATCH = 0x607C CM_SLAC_USER_DATA = 0x6080 CM_ATTEN_PROFILE = 0x6084 MMTYPE_REQ = 0x0000 MMTYPE_CNF = 0x0001 MMTYPE_IND = 0x0002 MMTYPE_RSP = 0x0003 class pyPlcHomeplug(): def showIpAddresses(self, mybytearray): addr = lambda pkt, offset: '.'.join(str(pkt[i]) for i in range(offset, offset + 4)) print('SRC %-16s\tDST %-16s' % (addr(mybytearray, self.sniffer.dloff + 12), addr(mybytearray, self.sniffer.dloff + 16))) def showMacAddresses(self, mybytearray): strDestMac = "" for i in range(0, 6): strDestMac = strDestMac + twoCharHex(mybytearray[i]) + ":" strSourceMac = "" for i in range(5, 12): strSourceMac = strSourceMac + twoCharHex(mybytearray[i]) + ":" lastThreeOfSource = mybytearray[6]*256*256 + mybytearray[7]*256 + mybytearray[8] strSourceFriendlyName = "" if (lastThreeOfSource == 0x0a663a): strSourceFriendlyName="Fritzbox" if (lastThreeOfSource == 0x0064c3): strSourceFriendlyName="Ioniq" print("From " + strSourceMac + strSourceFriendlyName + " to " + strDestMac) def getEtherType(self, messagebufferbytearray): etherType=0 if len(messagebufferbytearray)>(6+6+2): etherType=messagebufferbytearray[12]*256 + messagebufferbytearray[13] return etherType def fillSourceMac(self, mac, offset=6): # at offset 6 in the ethernet frame, we have the source MAC # we can give a different offset, to re-use the MAC also in the data area for i in range(0, 6): self.mytransmitbuffer[offset+i]=mac[i] def fillDestinationMac(self, mac, offset=0): # at offset 0 in the ethernet frame, we have the destination MAC # we can give a different offset, to re-use the MAC also in the data area for i in range(0, 6): self.mytransmitbuffer[offset+i]=mac[i] def cleanTransmitBuffer(self): # fill the complete ethernet transmit buffer with 0x00 for i in range(0, len(self.mytransmitbuffer)): self.mytransmitbuffer[i]=0 def setNmkAt(self, index): # sets the Network Membership Key (NMK) at a certain position in the transmit buffer for i in range(0, 16): self.mytransmitbuffer[index+i]=self.NMK[i] # NMK def setNidAt(self, index): # (b0f2e695666b03 was NID of TPlink) # 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] def getManagementMessageType(self): # calculates the MMTYPE (base value + lower two bits), see Table 11-2 of homeplug spec return (self.myreceivebuffer[16]<<8) + self.myreceivebuffer[15] def composeGetSwReq(self): # GET_SW.REQ request, as used by the win10 laptop self.mytransmitbuffer = bytearray(60) self.cleanTransmitBuffer() # Destination MAC self.fillDestinationMac(MAC_BROADCAST) # Source MAC self.fillSourceMac(self.myMAC) # Protocol self.mytransmitbuffer[12]=0x88 # Protocol HomeplugAV self.mytransmitbuffer[13]=0xE1 self.mytransmitbuffer[14]=0x00 # version self.mytransmitbuffer[15]=0x00 # GET_SW.REQ self.mytransmitbuffer[16]=0xA0 # self.mytransmitbuffer[17]=0x00 # Vendor OUI self.mytransmitbuffer[18]=0xB0 # self.mytransmitbuffer[19]=0x52 # def composeSetKey(self, variation=0): # CM_SET_KEY.REQ request # From example trace from catphish https://openinverter.org/forum/viewtopic.php?p=40558&sid=9c23d8c3842e95c4cf42173996803241#p40558 # Table 11-88 in the homeplug_av21_specification_final_public.pdf self.mytransmitbuffer = bytearray(60) self.cleanTransmitBuffer() # Destination MAC #self.fillDestinationMac(MAC_DEVOLO_26) #self.fillDestinationMac(MAC_TPLINK_E4) self.fillDestinationMac(MAC_BROADCAST) # Source MAC #self.fillSourceMac(MAC_LAPTOP) self.fillSourceMac(self.myMAC) # Protocol self.mytransmitbuffer[12]=0x88 # Protocol HomeplugAV self.mytransmitbuffer[13]=0xE1 self.mytransmitbuffer[14]=0x01 # version self.mytransmitbuffer[15]=0x08 # CM_SET_KEY.REQ self.mytransmitbuffer[16]=0x60 # self.mytransmitbuffer[17]=0x00 # frag_index self.mytransmitbuffer[18]=0x00 # frag_seqnum self.mytransmitbuffer[19]=0x01 # 0 key info type self.mytransmitbuffer[20]=0xaa # 1 my nonce self.mytransmitbuffer[21]=0xaa # 2 self.mytransmitbuffer[22]=0xaa # 3 self.mytransmitbuffer[23]=0xaa # 4 self.mytransmitbuffer[24]=0x00 # 5 your nonce self.mytransmitbuffer[25]=0x00 # 6 self.mytransmitbuffer[26]=0x00 # 7 self.mytransmitbuffer[27]=0x00 # 8 self.mytransmitbuffer[28]=0x04 # 9 nw info pid self.mytransmitbuffer[29]=0x00 # 10 info prn 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 # 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) self.mytransmitbuffer[41]+=variation # to try different NMKs # and three remaining zeros def composeGetKey(self): # CM_GET_KEY.REQ request # from https://github.com/uhi22/plctool2/blob/master/listen_to_eth.c # and homeplug_av21_specification_final_public.pdf self.mytransmitbuffer = bytearray(60) self.cleanTransmitBuffer() # Destination MAC #self.fillDestinationMac(MAC_DEVOLO_26) #self.fillDestinationMac(MAC_TPLINK_E4) self.fillDestinationMac(MAC_BROADCAST) # Source MAC #self.fillSourceMac(MAC_LAPTOP) self.fillSourceMac(self.myMAC) # Protocol self.mytransmitbuffer[12]=0x88 # Protocol HomeplugAV self.mytransmitbuffer[13]=0xE1 self.mytransmitbuffer[14]=0x01 # version self.mytransmitbuffer[15]=0x0C # CM_GET_KEY.REQ https://github.com/uhi22/plctool2/blob/master/plc_homeplug.h self.mytransmitbuffer[16]=0x60 # self.mytransmitbuffer[17]=0x00 # 2 bytes fragmentation information. 0000 means: unfragmented. self.mytransmitbuffer[18]=0x00 # self.mytransmitbuffer[19]=0x00 # 0 Request Type 0=direct self.mytransmitbuffer[20]=0x01 # 1 RequestedKeyType only "NMK" is permitted over the H1 interface. # value see HomeplugAV2.1 spec table 11-89. 1 means AES-128. self.setNidAt(21)# NID starts here (table 11-91 Homeplug spec is wrong. Verified by accepted command.) self.mytransmitbuffer[28]=0xaa # 10-13 mynonce. The position at 28 is verified by the response of the devolo. self.mytransmitbuffer[29]=0xaa # self.mytransmitbuffer[30]=0xaa # self.mytransmitbuffer[31]=0xaa # self.mytransmitbuffer[32]=0x04 # 14 PID. According to ISO15118-3 fix value 4, "HLE protocol" self.mytransmitbuffer[33]=0x00 # 15-16 PRN Protocol run number self.mytransmitbuffer[34]=0x00 # self.mytransmitbuffer[35]=0x00 # 17 PMN Protocol message number def composeSlacParamReq(self): # SLAC_PARAM request, as it was recorded 2021-12-17 WP charger 2 self.mytransmitbuffer = bytearray(60) self.cleanTransmitBuffer() # Destination MAC self.fillDestinationMac(MAC_BROADCAST) # Source MAC self.fillSourceMac(self.pevMac) # Protocol self.mytransmitbuffer[12]=0x88 # Protocol HomeplugAV self.mytransmitbuffer[13]=0xE1 self.mytransmitbuffer[14]=0x01 # version self.mytransmitbuffer[15]=0x64 # SLAC_PARAM.REQ self.mytransmitbuffer[16]=0x60 # self.mytransmitbuffer[17]=0x00 # 2 bytes fragmentation information. 0000 means: unfragmented. self.mytransmitbuffer[18]=0x00 # self.mytransmitbuffer[19]=0x00 # self.mytransmitbuffer[20]=0x00 # self.mytransmitbuffer[21]=0x04 # runid 8 bytes self.mytransmitbuffer[22]=0x65 # self.mytransmitbuffer[23]=0x65 # self.mytransmitbuffer[24]=0x00 # self.mytransmitbuffer[25]=0x64 # self.mytransmitbuffer[26]=0xC3 # self.mytransmitbuffer[27]=0x00 # self.mytransmitbuffer[28]=0x00 # # rest is 00 def composeSlacParamCnf(self): self.mytransmitbuffer = bytearray(60) self.cleanTransmitBuffer() # Destination MAC self.fillDestinationMac(self.pevMac) # Source MAC self.fillSourceMac(self.myMAC) # Protocol self.mytransmitbuffer[12]=0x88 # Protocol HomeplugAV self.mytransmitbuffer[13]=0xE1 self.mytransmitbuffer[14]=0x01 # version self.mytransmitbuffer[15]=0x65 # SLAC_PARAM.confirm self.mytransmitbuffer[16]=0x60 # self.mytransmitbuffer[17]=0x00 # 2 bytes fragmentation information. 0000 means: unfragmented. self.mytransmitbuffer[18]=0x00 # self.mytransmitbuffer[19]=0xff # 19-24 sound target self.mytransmitbuffer[20]=0xff # self.mytransmitbuffer[21]=0xff # self.mytransmitbuffer[22]=0xff # self.mytransmitbuffer[23]=0xff # self.mytransmitbuffer[24]=0xff # self.mytransmitbuffer[25]=0x0A # sound count self.mytransmitbuffer[26]=0x06 # timeout self.mytransmitbuffer[27]=0x01 # resptype 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(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(self.myMAC) # 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(self.myMAC) # 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(self.myMAC, 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) self.cleanTransmitBuffer() # Destination MAC self.fillDestinationMac(MAC_BROADCAST) # Source MAC self.fillSourceMac(MAC_LAPTOP) self.mytransmitbuffer[12]=0x08 # Protocol IPv4 self.mytransmitbuffer[13]=0x00 self.mytransmitbuffer[14]=0x45 # header len self.mytransmitbuffer[15]=0x00 # self.mytransmitbuffer[16]=0x01 # self.mytransmitbuffer[17]=0x6D # self.mytransmitbuffer[18]=0x9B # self.mytransmitbuffer[19]=0x30 # self.mytransmitbuffer[20]=0x00 # self.mytransmitbuffer[21]=0x00 # self.mytransmitbuffer[22]=0x40 # self.mytransmitbuffer[23]=0x11 # self.mytransmitbuffer[24]=0xde # self.mytransmitbuffer[25]=0x50 # self.mytransmitbuffer[26]=0x00 # self.mytransmitbuffer[27]=0x00 # self.mytransmitbuffer[28]=0x00 # self.mytransmitbuffer[29]=0x00 # self.mytransmitbuffer[30]=0xFF # self.mytransmitbuffer[31]=0xFF # self.mytransmitbuffer[32]=0xFF # self.mytransmitbuffer[33]=0xFF # self.mytransmitbuffer[34]=0x00 # self.mytransmitbuffer[35]=0x44 # self.mytransmitbuffer[36]=0x00 # self.mytransmitbuffer[37]=0x43 # def sendTestFrame(self, selection): if (selection=="1"): self.composeSlacParamReq() self.addToTrace("transmitting SLAC_PARAM.REQ...") self.transmit(self.mytransmitbuffer) if (selection=="2"): self.composeSlacParamCnf() self.addToTrace("transmitting SLAC_PARAM.CNF...") self.transmit(self.mytransmitbuffer) if (selection=="S"): self.composeGetSwReq() self.addToTrace("transmitting GetSwReq...") self.transmit(self.mytransmitbuffer) if (selection=="s"): self.composeSetKey(0) self.addToTrace("transmitting SET_KEY.REQ (key 0)") self.transmit(self.mytransmitbuffer) if (selection=="t"): self.composeSetKey(2) self.addToTrace("transmitting SET_KEY.REQ (key 2)") self.transmit(self.mytransmitbuffer) if (selection=="D"): self.composeDHCP() self.addToTrace("transmitting broken DHCP") self.transmit(self.mytransmitbuffer) if (selection=="G"): self.composeGetKey() self.addToTrace("transmitting GET_KEY") self.transmit(self.mytransmitbuffer) def transmit(self, pkt): self.sniffer.sendpacket(bytes(pkt)) def evaluateGetKeyCnf(self): # 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): # 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): # 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) s = "" for i in range(0, 16): self.NMK[i] = self.myreceivebuffer[93+i] s=s+hex(self.NMK[i])+ " " print("From SlacMatchCnf, got network membership key (NMK) " + s) # use the extracted NMK and NID to set the key in the adaptor: self.composeSetKey(0) self.addToTrace("transmitting CM_SET_KEY.REQ") self.sniffer.sendpacket(bytes(self.mytransmitbuffer)) def evaluateReceivedHomeplugPacket(self): mmt = self.getManagementMessageType() 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): self.strInterfaceName="eth0" # default, if the real is not found print("Interfaces:\n" + '\n'.join(pcap.findalldevs())) for i in range(0, 10): strInterfaceName = pcap.ex_name("eth"+str(i)) if (strInterfaceName == '\\Device\\NPF_{E4B8176C-8516-4D48-88BC-85225ABCF259}'): print("This is the wanted Ethernet adaptor.") 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.ipv6.enterPevMode() self.showStatus("PEV mode", "mode") def enterEvseMode(self): self.iAmEvse = 1 # emulating a charging station self.iAmPev = 0 # not emulating a vehicle self.ipv6.enterEvseMode() self.showStatus("EVSE mode", "mode") def enterListenMode(self): self.iAmEvse = 0 # not emulating a charging station self.iAmPev = 0 # not emulating a vehicle self.ipv6.enterListenMode() 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 self.callbackAddToTrace = callbackAddToTrace self.callbackShowStatus = callbackShowStatus #self.sniffer = pcap.pcap(name=None, promisc=True, immediate=True, timeout_ms=50) # eth3 means: Third entry from back, in the list of interfaces, which is provided by pcap.findalldevs. # Improvement necessary: select the interface based on the name. # For debugging of the interface names, we can patch the file # C:\Users\uwemi\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\pcap\_pcap_ex.py, # in the function # def name(name: bytes) -> bytes: # in the place after # if i == idx: # print("index match at " + str(i) + " dev name=" + str(dev.name) + " dev.description=" + str(dev.description)) # This will print the description of the used interface. # # Patch for non-blocking read-iteration: # in _pcap.py, function def __next__(self), in the case of timeout (if n==0), we need to "raise StopIteration" instead of "continue". # self.findEthernetAdaptor() self.sniffer = pcap.pcap(name=self.strInterfaceName, promisc=True, immediate=True, timeout_ms=50) 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.myMAC = MAC_LAPTOP # todo: find this dynamically self.runningCounter=0 self.ipv6 = pyPlcIpv6.ipv6handler(self.transmit) self.ipv6.ownMac = self.myMAC 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, selection=""): 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)) # the time stamp etherType = self.getEtherType(pkt) if (etherType == 0x88E1): # it is a HomePlug message self.myreceivebuffer = pkt # self.showMacAddresses(pkt) self.evaluateReceivedHomeplugPacket() if (etherType == 0x86dd): # it is an IPv6 frame self.ipv6.evaluateReceivedPacket(pkt) self.showStatus("nPacketsReceived=" + str(self.nPacketsReceived)) def close(self): self.sniffer.close()