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72 lines
2.3 KiB
Python
72 lines
2.3 KiB
Python
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# Vorraussetzungen:
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# Library pcap-ct (nicht libpcap, nicht pylibpcap, nicht pypcap)
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#
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# Stand 2022-08-14:
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# - Auswahl des Interaces ok
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# - Sniffen des SLAC-request ok
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# - Aussenden eine Demo-Botschaft ok
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#
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import pcap
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def twoCharHex(b):
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strHex = "%0.2X" % b
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return strHex
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def showAsHex(mybytearray):
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packetlength = len(mybytearray)
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strHex = ""
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for i in range(0, packetlength):
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strHex = strHex + twoCharHex(mybytearray[i]) + " "
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print("len " + str(packetlength) + " data " + strHex)
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def showIpAddresses(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, sniffer.dloff + 12), addr(mybytearray, sniffer.dloff + 16)))
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def showMacAddresses(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 isHomeplug(mybytearray):
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blIsHomePlug=False
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if len(mybytearray)>(6+6+2):
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protocol=mybytearray[12]*256 + mybytearray[13]
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if (protocol == 0x88E1):
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blIsHomePlug=True
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print("HomePlug protocol")
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return blIsHomePlug
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def sendTestFrame():
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print("todo...")
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mytransmitbuffer = bytearray("Hallo das ist ein Test", 'UTF-8')
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#sniffer = pcap.pcap(name=None, promisc=True, immediate=True, timeout_ms=50)
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# eth3 bedeutet: Dritter Eintrag von hinten, in der Liste der Interfaces, die von pcap.findalldevs geliefert wird.
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# Verbesserungsbedarf: Interface namensbasiert auswählen.
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sniffer = pcap.pcap(name="eth3", promisc=True, immediate=True, timeout_ms=50)
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print("Press control-C to stop")
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for ts, pkt in sniffer:
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#print('%d' % (ts))
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if (isHomeplug(pkt)):
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showMacAddresses(pkt)
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showAsHex(pkt)
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sendTestFrame()
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sniffer.sendpacket(bytes(mytransmitbuffer))
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else:
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print("(other)")
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sniffer.close() |