60 lines
1.7 KiB
Python
Executable File
60 lines
1.7 KiB
Python
Executable File
#!/usr/bin/env python
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import sys
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import struct
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from scapy.all import sniff, sendp, hexdump, get_if_list, get_if_hwaddr, bind_layers
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from scapy.all import Packet, IPOption
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from scapy.all import IP, UDP, Raw, Ether
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from scapy.layers.inet import _IPOption_HDR
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from scapy.fields import *
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def get_if():
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ifs=get_if_list()
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iface=None
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for i in get_if_list():
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if "eth0" in i:
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iface=i
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break;
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if not iface:
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print "Cannot find eth0 interface"
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exit(1)
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return iface
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class IPOption_MRI(IPOption):
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name = "MRI"
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option = 31
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fields_desc = [ _IPOption_HDR,
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FieldLenField("length", None, fmt="B",
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length_of="swids",
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adjust=lambda pkt,l:l+4),
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ShortField("count", 0),
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FieldListField("swids",
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[],
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IntField("", 0),
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length_from=lambda pkt:pkt.count*4) ]
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def handle_pkt(pkt):
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print "got a packet"
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pkt.show2()
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# hexdump(pkt)
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sys.stdout.flush()
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class SourceRoute(Packet):
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fields_desc = [ BitField("bos", 0, 1),
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BitField("port", 0, 15)]
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class SourceRoutingTail(Packet):
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fields_desc = [ XShortField("etherType", 0x800)]
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bind_layers(Ether, SourceRoute, type=0x1234)
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bind_layers(SourceRoute, SourceRoute, bos=0)
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bind_layers(SourceRoute, SourceRoutingTail, bos=1)
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def main():
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iface = 'h2-eth0'
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print "sniffing on %s" % iface
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sys.stdout.flush()
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sniff(filter="udp and port 4321", iface = iface,
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prn = lambda x: handle_pkt(x))
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if __name__ == '__main__':
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main()
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