mirror of
https://github.com/uhi22/pyPLC.git
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662 lines
32 KiB
Python
662 lines
32 KiB
Python
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# Preconditions:
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# Library pcap-ct (not libpcap, not pylibpcap, not pypcap)
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#
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# Version 2022-08-14:
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# - Selection of interfaces ok
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# - Sniffing of the SLAC-request ok
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# - Transmission of a demo message ok
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#
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# Test results 2022-10-15
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# 1. GET_SW.REQ broadcast is answered by both TPlinks, while the first is connected to eth, the other via PLC at the first.
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# 2. Step 1 works also, if we use a different MAC address than the original laptop ethernet MAC.
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# 3. CM_SET_KEY addressed to the correct destination works, with the following results:
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# - there were cases, when the TPlink responded "negative", but with a "valid" none (each time it used a new mynonce, and correctly
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# reflected our mynonce.
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# - but also there is "positive" response, also with correct nonces.
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# - also the Devolo reponds positive and with correct nonces.
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# - not yet checked, whether the NMK is really set
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# 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
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# request, it responds with KEY_GRANTED, Keytype=NMK, and a key 7f19ba0261892d59b7ea42aed875d2320000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
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# This key delivers exactly the NMK, which we have set in the CM_SET_KEY.
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# But: There are some pitfalls:
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# The CM_SET_KEY responds in some cases (wrong request) positive, but does not apply the NMK.
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# If the CM_SET_KEY is well-formatted, including the correct NID, we get a false-negative response, and
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# we see the LEDs on the adaptor shortly going completely off, completely on, and back to normal state. This
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# is the sign, that the new key was accepted. It means, the
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# adaptor is making a reset, to apply the new key.
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# 5. CM_SET_KEY and CM_GET_KEY works also when sent to broadcast address. For both, devolo and tpLink.
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# 2022-10-18 further tests
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# 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.
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# 7. The tpLink does NOT report the SLAC_PARAM to ethernet. Bad.
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# 8. The tpLink has software from 2017, maybe the SLAC was removed at this version.
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# 9. Article regarding firmware- and configuration update: https://fitzcarraldoblog.wordpress.com/2020/07/22/updating-the-powerline-adapters-in-my-home-network/
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import pcap
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import pyPlcIpv6
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from helpers import * # prettyMac etc
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from pyPlcModes import *
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MAC_BROADCAST = [0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF ]
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CM_SET_KEY = 0x6008
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CM_GET_KEY = 0x600C
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CM_SC_JOIN = 0x6010
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CM_CHAN_EST = 0x6014
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CM_TM_UPDATE = 0x6018
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CM_AMP_MAP = 0x601C
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CM_BRG_INFO = 0x6020
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CM_CONN_NEW = 0x6024
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CM_CONN_REL = 0x6028
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CM_CONN_MOD = 0x602C
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CM_CONN_INFO = 0x6030
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CM_STA_CAP = 0x6034
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CM_NW_INFO = 0x6038
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CM_GET_BEACON = 0x603C
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CM_HFID = 0x6040
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CM_MME_ERROR = 0x6044
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CM_NW_STATS = 0x6048
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CM_SLAC_PARAM = 0x6064
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CM_START_ATTEN_CHAR = 0x6068
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CM_ATTEN_CHAR = 0x606C
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CM_PKCS_CERT = 0x6070
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CM_MNBC_SOUND = 0x6074
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CM_VALIDATE = 0x6078
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CM_SLAC_MATCH = 0x607C
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CM_SLAC_USER_DATA = 0x6080
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CM_ATTEN_PROFILE = 0x6084
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MMTYPE_REQ = 0x0000
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MMTYPE_CNF = 0x0001
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MMTYPE_IND = 0x0002
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MMTYPE_RSP = 0x0003
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class pyPlcHomeplug():
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def showIpAddresses(self, mybytearray):
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addr = lambda pkt, offset: '.'.join(str(pkt[i]) for i in range(offset, offset + 4))
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print('SRC %-16s\tDST %-16s' % (addr(mybytearray, self.sniffer.dloff + 12), addr(mybytearray, self.sniffer.dloff + 16)))
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def showMacAddresses(self, mybytearray):
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strDestMac = ""
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for i in range(0, 6):
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strDestMac = strDestMac + twoCharHex(mybytearray[i]) + ":"
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strSourceMac = ""
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for i in range(5, 12):
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strSourceMac = strSourceMac + twoCharHex(mybytearray[i]) + ":"
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lastThreeOfSource = mybytearray[6]*256*256 + mybytearray[7]*256 + mybytearray[8]
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strSourceFriendlyName = ""
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if (lastThreeOfSource == 0x0a663a):
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strSourceFriendlyName="Fritzbox"
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if (lastThreeOfSource == 0x0064c3):
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strSourceFriendlyName="Ioniq"
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print("From " + strSourceMac + strSourceFriendlyName + " to " + strDestMac)
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def getEtherType(self, messagebufferbytearray):
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etherType=0
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if len(messagebufferbytearray)>(6+6+2):
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etherType=messagebufferbytearray[12]*256 + messagebufferbytearray[13]
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return etherType
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def fillSourceMac(self, mac, offset=6): # at offset 6 in the ethernet frame, we have the source MAC
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# we can give a different offset, to re-use the MAC also in the data area
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for i in range(0, 6):
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self.mytransmitbuffer[offset+i]=mac[i]
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def fillDestinationMac(self, mac, offset=0): # at offset 0 in the ethernet frame, we have the destination MAC
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# we can give a different offset, to re-use the MAC also in the data area
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for i in range(0, 6):
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self.mytransmitbuffer[offset+i]=mac[i]
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def cleanTransmitBuffer(self): # fill the complete ethernet transmit buffer with 0x00
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for i in range(0, len(self.mytransmitbuffer)):
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self.mytransmitbuffer[i]=0
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def setNmkAt(self, index):
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# sets the Network Membership Key (NMK) at a certain position in the transmit buffer
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for i in range(0, 16):
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self.mytransmitbuffer[index+i]=self.NMK[i] # NMK
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def setNidAt(self, index):
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# (b0f2e695666b03 was NID of TPlink)
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# copies the network ID (NID, 7 bytes) into the wished position in the transmit buffer
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for i in range(0, 7):
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self.mytransmitbuffer[index+i]=self.NID[i]
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def getManagementMessageType(self):
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# calculates the MMTYPE (base value + lower two bits), see Table 11-2 of homeplug spec
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return (self.myreceivebuffer[16]<<8) + self.myreceivebuffer[15]
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def composeGetSwReq(self):
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# GET_SW.REQ request, as used by the win10 laptop
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self.mytransmitbuffer = bytearray(60)
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self.cleanTransmitBuffer()
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# Destination MAC
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self.fillDestinationMac(MAC_BROADCAST)
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# Source MAC
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self.fillSourceMac(self.myMAC)
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# Protocol
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self.mytransmitbuffer[12]=0x88 # Protocol HomeplugAV
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self.mytransmitbuffer[13]=0xE1
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self.mytransmitbuffer[14]=0x00 # version
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self.mytransmitbuffer[15]=0x00 # GET_SW.REQ
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self.mytransmitbuffer[16]=0xA0 #
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self.mytransmitbuffer[17]=0x00 # Vendor OUI
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self.mytransmitbuffer[18]=0xB0 #
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self.mytransmitbuffer[19]=0x52 #
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def composeSetKey(self, variation=0):
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# CM_SET_KEY.REQ request
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# From example trace from catphish https://openinverter.org/forum/viewtopic.php?p=40558&sid=9c23d8c3842e95c4cf42173996803241#p40558
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# Table 11-88 in the homeplug_av21_specification_final_public.pdf
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self.mytransmitbuffer = bytearray(60)
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self.cleanTransmitBuffer()
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# Destination MAC
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#self.fillDestinationMac(MAC_DEVOLO_26)
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#self.fillDestinationMac(MAC_TPLINK_E4)
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self.fillDestinationMac(MAC_BROADCAST)
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# Source MAC
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self.fillSourceMac(self.myMAC)
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# Protocol
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self.mytransmitbuffer[12]=0x88 # Protocol HomeplugAV
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self.mytransmitbuffer[13]=0xE1
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self.mytransmitbuffer[14]=0x01 # version
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self.mytransmitbuffer[15]=0x08 # CM_SET_KEY.REQ
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self.mytransmitbuffer[16]=0x60 #
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self.mytransmitbuffer[17]=0x00 # frag_index
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self.mytransmitbuffer[18]=0x00 # frag_seqnum
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self.mytransmitbuffer[19]=0x01 # 0 key info type
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self.mytransmitbuffer[20]=0xaa # 1 my nonce
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self.mytransmitbuffer[21]=0xaa # 2
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self.mytransmitbuffer[22]=0xaa # 3
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self.mytransmitbuffer[23]=0xaa # 4
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self.mytransmitbuffer[24]=0x00 # 5 your nonce
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self.mytransmitbuffer[25]=0x00 # 6
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self.mytransmitbuffer[26]=0x00 # 7
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self.mytransmitbuffer[27]=0x00 # 8
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self.mytransmitbuffer[28]=0x04 # 9 nw info pid
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self.mytransmitbuffer[29]=0x00 # 10 info prn
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self.mytransmitbuffer[30]=0x00 # 11
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self.mytransmitbuffer[31]=0x00 # 12 pmn
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self.mytransmitbuffer[32]=0x00 # 13 cco cap
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self.setNidAt(33) # 14-20 nid 7 bytes from 33 to 39
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# Network ID to be associated with the key distributed herein.
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# The 54 LSBs of this field contain the NID (refer to Section 3.4.3.1). The
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# two MSBs shall be set to 0b00.
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self.mytransmitbuffer[40]=0x01 # 21 peks (payload encryption key select) Table 11-83. 01 is NMK. We had 02 here, why???
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# with 0x0F we could choose "no key, payload is sent in the clear"
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self.setNmkAt(41)
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self.mytransmitbuffer[41]+=variation # to try different NMKs
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# and three remaining zeros
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def composeGetKey(self):
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# CM_GET_KEY.REQ request
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# from https://github.com/uhi22/plctool2/blob/master/listen_to_eth.c
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# and homeplug_av21_specification_final_public.pdf
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self.mytransmitbuffer = bytearray(60)
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self.cleanTransmitBuffer()
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# Destination MAC
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#self.fillDestinationMac(MAC_DEVOLO_26)
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#self.fillDestinationMac(MAC_TPLINK_E4)
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self.fillDestinationMac(MAC_BROADCAST)
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# Source MAC
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self.fillSourceMac(self.myMAC)
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# Protocol
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self.mytransmitbuffer[12]=0x88 # Protocol HomeplugAV
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self.mytransmitbuffer[13]=0xE1
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self.mytransmitbuffer[14]=0x01 # version
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self.mytransmitbuffer[15]=0x0C # CM_GET_KEY.REQ https://github.com/uhi22/plctool2/blob/master/plc_homeplug.h
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self.mytransmitbuffer[16]=0x60 #
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self.mytransmitbuffer[17]=0x00 # 2 bytes fragmentation information. 0000 means: unfragmented.
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self.mytransmitbuffer[18]=0x00 #
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self.mytransmitbuffer[19]=0x00 # 0 Request Type 0=direct
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self.mytransmitbuffer[20]=0x01 # 1 RequestedKeyType only "NMK" is permitted over the H1 interface.
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# value see HomeplugAV2.1 spec table 11-89. 1 means AES-128.
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self.setNidAt(21)# NID starts here (table 11-91 Homeplug spec is wrong. Verified by accepted command.)
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self.mytransmitbuffer[28]=0xaa # 10-13 mynonce. The position at 28 is verified by the response of the devolo.
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self.mytransmitbuffer[29]=0xaa #
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self.mytransmitbuffer[30]=0xaa #
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self.mytransmitbuffer[31]=0xaa #
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self.mytransmitbuffer[32]=0x04 # 14 PID. According to ISO15118-3 fix value 4, "HLE protocol"
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self.mytransmitbuffer[33]=0x00 # 15-16 PRN Protocol run number
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self.mytransmitbuffer[34]=0x00 #
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self.mytransmitbuffer[35]=0x00 # 17 PMN Protocol message number
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def composeSlacParamReq(self):
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# SLAC_PARAM request, as it was recorded 2021-12-17 WP charger 2
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self.mytransmitbuffer = bytearray(60)
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self.cleanTransmitBuffer()
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# Destination MAC
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self.fillDestinationMac(MAC_BROADCAST)
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# Source MAC
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self.fillSourceMac(self.pevMac)
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# Protocol
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self.mytransmitbuffer[12]=0x88 # Protocol HomeplugAV
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self.mytransmitbuffer[13]=0xE1
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self.mytransmitbuffer[14]=0x01 # version
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self.mytransmitbuffer[15]=0x64 # SLAC_PARAM.REQ
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self.mytransmitbuffer[16]=0x60 #
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self.mytransmitbuffer[17]=0x00 # 2 bytes fragmentation information. 0000 means: unfragmented.
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self.mytransmitbuffer[18]=0x00 #
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self.mytransmitbuffer[19]=0x00 #
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self.mytransmitbuffer[20]=0x00 #
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self.mytransmitbuffer[21]=0x04 # runid 8 bytes
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self.mytransmitbuffer[22]=0x65 #
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self.mytransmitbuffer[23]=0x65 #
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self.mytransmitbuffer[24]=0x00 #
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self.mytransmitbuffer[25]=0x64 #
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self.mytransmitbuffer[26]=0xC3 #
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self.mytransmitbuffer[27]=0x00 #
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self.mytransmitbuffer[28]=0x00 #
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# rest is 00
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def composeSlacParamCnf(self):
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self.mytransmitbuffer = bytearray(60)
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self.cleanTransmitBuffer()
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# Destination MAC
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self.fillDestinationMac(self.pevMac)
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# Source MAC
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self.fillSourceMac(self.myMAC)
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# Protocol
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self.mytransmitbuffer[12]=0x88 # Protocol HomeplugAV
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self.mytransmitbuffer[13]=0xE1
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self.mytransmitbuffer[14]=0x01 # version
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self.mytransmitbuffer[15]=0x65 # SLAC_PARAM.confirm
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self.mytransmitbuffer[16]=0x60 #
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self.mytransmitbuffer[17]=0x00 # 2 bytes fragmentation information. 0000 means: unfragmented.
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self.mytransmitbuffer[18]=0x00 #
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self.mytransmitbuffer[19]=0xff # 19-24 sound target
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self.mytransmitbuffer[20]=0xff #
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self.mytransmitbuffer[21]=0xff #
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self.mytransmitbuffer[22]=0xff #
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self.mytransmitbuffer[23]=0xff #
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self.mytransmitbuffer[24]=0xff #
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self.mytransmitbuffer[25]=0x0A # sound count
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self.mytransmitbuffer[26]=0x06 # timeout
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self.mytransmitbuffer[27]=0x01 # resptype
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self.fillDestinationMac(self.pevMac, 28) # forwarding_sta, same as PEV MAC, plus 2 bytes 00 00
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self.mytransmitbuffer[34]=0x00 #
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self.mytransmitbuffer[35]=0x00 #
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self.fillDestinationMac(self.pevMac, 36) # runid, same as PEV MAC, plus 2 bytes 00 00
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self.mytransmitbuffer[42]=0x0 #
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self.mytransmitbuffer[43]=0x0 #
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# rest is 00
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def composeStartAttenCharInd(self):
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# todo
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print("todo: implement composeStartAttenCharInd")
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pass
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def composeNmbcSoundInd(self):
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# todo
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print("todo: implement composeNmbcSoundInd")
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pass
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def composeAttenCharInd(self):
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self.mytransmitbuffer = bytearray(129)
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self.cleanTransmitBuffer()
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# Destination MAC
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self.fillDestinationMac(self.pevMac)
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# Source MAC
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self.fillSourceMac(self.myMAC)
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# Protocol
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self.mytransmitbuffer[12]=0x88 # Protocol HomeplugAV
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self.mytransmitbuffer[13]=0xE1
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self.mytransmitbuffer[14]=0x01 # version
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self.mytransmitbuffer[15]=0x6E # ATTEN_CHAR.IND
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self.mytransmitbuffer[16]=0x60 #
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self.mytransmitbuffer[17]=0x00 # 2 bytes fragmentation information. 0000 means: unfragmented.
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self.mytransmitbuffer[18]=0x00 #
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self.mytransmitbuffer[19]=0x00 # apptype
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self.mytransmitbuffer[20]=0x00 # security
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self.fillDestinationMac(self.pevMac, 21) # The wireshark calls it source_mac, but alpitronic fills it with PEV mac. We use the PEV MAC.
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self.fillDestinationMac(self.pevMac, 27) # runid. The alpitronic fills it with the PEV mac, plus 00 00.
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self.mytransmitbuffer[35]=0x00 # 35 - 51 source_id, 17 bytes. The alpitronic fills it with 00
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self.mytransmitbuffer[52]=0x00 # 52 - 68 response_id, 17 bytes. The alpitronic fills it with 00.
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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?
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self.mytransmitbuffer[70]=0x3A # Number of groups = 58. Should this be more flexible?
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for i in range(71, 129): # 71 to 128: The group attenuation for the 58 announced groups.
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self.mytransmitbuffer[i]=9 # Typical values are between 1 and 0x19. Since we have no real measurements from the AR7020,
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# we just simulate something. 0 seems to be interpreted as "defect", the IONIQ does not send
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# a positive response in this case.
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# higher attenuation for the higher frequencies, to be a little bit realistic (real data from alpitronic trace)
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self.mytransmitbuffer[126]=0x0f
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self.mytransmitbuffer[127]=0x13
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self.mytransmitbuffer[128]=0x19
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def composeSlacMatchCnf(self):
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self.mytransmitbuffer = bytearray(109)
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self.cleanTransmitBuffer()
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# Destination MAC
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self.fillDestinationMac(self.pevMac)
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# Source MAC
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self.fillSourceMac(self.myMAC)
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# Protocol
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self.mytransmitbuffer[12]=0x88 # Protocol HomeplugAV
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self.mytransmitbuffer[13]=0xE1
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self.mytransmitbuffer[14]=0x01 # version
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self.mytransmitbuffer[15]=0x7D # SLAC_MATCH.CNF
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self.mytransmitbuffer[16]=0x60 #
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self.mytransmitbuffer[17]=0x00 # 2 bytes fragmentation information. 0000 means: unfragmented.
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self.mytransmitbuffer[18]=0x00 #
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self.mytransmitbuffer[19]=0x00 # apptype
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self.mytransmitbuffer[20]=0x00 # security
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self.mytransmitbuffer[21]=0x56 # length 2 byte
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self.mytransmitbuffer[22]=0x00 #
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# 23 - 39: pev_id 17 bytes. All zero in alpi/Ioniq trace.
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self.fillDestinationMac(self.pevMac, 40) # 40 - 45 pev_mac
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# 46 - 62: evse_id 17 bytes. All zero in alpi/Ioniq trace.
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self.fillSourceMac(self.myMAC, 63) # 63 - 68 evse_mac
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self.fillDestinationMac(self.pevMac, 69) # 69-76 run_id. Is the ioniq mac plus 00 00.
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# 77 to 84 reserved 0
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self.setNidAt(85) # 85-91 NID. We can nearly freely choose this, but the upper two bits need to be zero
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# 92 reserved 0
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self.setNmkAt(93) # 93 to 108 NMK. We can freely choose this. Normally we should use a random number.
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def runPevSequencer(self):
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# in PEV mode, initiate the SLAC sequence
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# Todo: Timing between the states, and timeout handling to be implemented
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if (self.iAmPev==1):
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if (self.pevSequenceState==0): # waiting for start condition
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# In real life we would check whether we see 5% PWM on the pilot line.
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# Then we would maybe wait a little bit until the homeplug modems are awake.
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# Now sending the first packet for the SLAC sequence:
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self.composeSlacParamReq()
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self.addToTrace("transmitting SLAC_PARAM.REQ...")
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self.transmit(self.mytransmitbuffer)
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self.pevSequenceState = 1
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return
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if (self.pevSequenceState==1): # waiting for SLAC_PARAM.CNF
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return
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|
if (self.pevSequenceState==2): # received SLAC_PARAM.CNF
|
|
# todo: transmit the START_ATTEN_CHAR.IND 3 times
|
|
self.composeStartAttenCharInd()
|
|
self.addToTrace("transmitting START_ATTEN_CHAR.IND...")
|
|
self.transmit(self.mytransmitbuffer)
|
|
self.pevSequenceState = 3
|
|
return
|
|
if (self.pevSequenceState==3):
|
|
# todo: transmit the START_ATTEN_CHAR.IND 3 times
|
|
self.composeStartAttenCharInd()
|
|
self.addToTrace("transmitting START_ATTEN_CHAR.IND...")
|
|
self.transmit(self.mytransmitbuffer)
|
|
self.pevSequenceState = 4
|
|
return
|
|
if (self.pevSequenceState==4):
|
|
# todo: transmit the START_ATTEN_CHAR.IND 3 times
|
|
self.composeStartAttenCharInd()
|
|
self.addToTrace("transmitting START_ATTEN_CHAR.IND...")
|
|
self.transmit(self.mytransmitbuffer)
|
|
self.pevSequenceState = 5
|
|
self.SoundCountDown=10
|
|
return
|
|
if (self.pevSequenceState==5): # START_ATTEN_CHAR.IND are finished. Now we send 10 MNBC_SOUND.IND
|
|
self.composeNmbcSoundInd()
|
|
self.addToTrace("transmitting MNBC_SOUND.IND...")
|
|
self.transmit(self.mytransmitbuffer)
|
|
if (self.SoundCountDown>0):
|
|
self.SoundCountDown-=1
|
|
else:
|
|
self.pevSequenceState = 6
|
|
return
|
|
if (self.pevSequenceState==6): # waiting for ATTEN_CHAR.IND
|
|
# todo: it is possible that we receive this message from multiple chargers. We need
|
|
# to select the charger with the loudest reported signals.
|
|
return
|
|
if (self.pevSequenceState==7): # ATTEN_CHAR.IND was received and the nearest charger decided
|
|
self.composeAttenCharRsp()
|
|
self.addToTrace("transmitting ATTEN_CHAR.RSP...")
|
|
self.transmit(self.mytransmitbuffer)
|
|
self.pevSequenceState = 8
|
|
return
|
|
if (self.pevSequenceState==8): # ATTEN_CHAR.RSP was transmitted. Next is SLAC_MATCH.REQ
|
|
self.composeSlacMatchReq()
|
|
self.addToTrace("transmitting SLAC_MATCH.REQ...")
|
|
self.transmit(self.mytransmitbuffer)
|
|
self.pevSequenceState = 9
|
|
return
|
|
if (self.pevSequenceState==9): # waiting for SLAC_MATCH.CNF
|
|
return
|
|
if (self.pevSequenceState==10): # SLAC is finished, KEY is set, AVLN is established.
|
|
# todo: inform the higher-level state machine, that now it can start the SDP
|
|
return
|
|
|
|
|
|
|
|
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) # set key with modified content
|
|
self.addToTrace("transmitting SET_KEY.REQ (key 2)")
|
|
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.addressManager.setPevMac(self.pevMac)
|
|
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 evaluateSlacParamCnf(self):
|
|
# As PEV, we receive the first response from the charger.
|
|
if (self.iAmPev==1):
|
|
if (self.pevSequenceState==1): # we were waiting for the SlacParamCnf
|
|
self.pevSequenceState=2 # enter next state. Will be handled in the cyclic runPevSequencer
|
|
|
|
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_SLAC_PARAM + MMTYPE_CNF):
|
|
self.evaluateSlacParamCnf()
|
|
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, mode=C_LISTEN_MODE, addrMan=None):
|
|
self.mytransmitbuffer = bytearray("Hallo das ist ein Test", 'UTF-8')
|
|
self.nPacketsReceived = 0
|
|
self.callbackAddToTrace = callbackAddToTrace
|
|
self.callbackShowStatus = callbackShowStatus
|
|
self.addressManager = addrMan
|
|
self.pevSequenceState = 0
|
|
#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. Will be overwritten later.
|
|
self.myMAC = self.addressManager.getLocalMacAddress()
|
|
self.runningCounter=0
|
|
self.ipv6 = pyPlcIpv6.ipv6handler(self.transmit, self.addressManager)
|
|
self.ipv6.ownMac = self.myMAC
|
|
if (mode == C_LISTEN_MODE):
|
|
self.enterListenMode()
|
|
if (mode == C_EVSE_MODE):
|
|
self.enterEvseMode()
|
|
if (mode == C_PEV_MODE):
|
|
self.enterPevMode()
|
|
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
|
|
# We received an ethernet package. Determine its type, and dispatch it to the related handler.
|
|
etherType = self.getEtherType(pkt)
|
|
if (etherType == 0x88E1): # it is a HomePlug message
|
|
self.myreceivebuffer = pkt
|
|
self.evaluateReceivedHomeplugPacket()
|
|
if (etherType == 0x86dd): # it is an IPv6 frame
|
|
self.ipv6.evaluateReceivedPacket(pkt)
|
|
|
|
self.showStatus("nPacketsReceived=" + str(self.nPacketsReceived))
|
|
self.runPevSequencer() # run the message sequencer for the PEV side
|
|
|
|
def close(self):
|
|
self.sniffer.close()
|
|
|