97f31560ca
* Copying P4D2 Fall 2017 into P4D2 2018 East. * Updated P4D2_2018_East VM. Added vagrant URL workaround, cdrom to VM. Updated to latest commits of BMV2, p4c, PI. Known issue with p4runtime exercise. * Applied patch from @antoninbas in and updated solution
54 lines
1.5 KiB
Python
Executable File
54 lines
1.5 KiB
Python
Executable File
#!/usr/bin/env python
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import sys
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import struct
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import os
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from scapy.all import sniff, sendp, hexdump, get_if_list, get_if_hwaddr
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from scapy.all import Packet, IPOption
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from scapy.all import ShortField, IntField, LongField, BitField, FieldListField, FieldLenField
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from scapy.all import IP, TCP, UDP, Raw
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from scapy.layers.inet import _IPOption_HDR
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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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if TCP in pkt and pkt[TCP].dport == 1234:
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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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def main():
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ifaces = filter(lambda i: 'eth' in i, os.listdir('/sys/class/net/'))
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iface = ifaces[0]
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print "sniffing on %s" % iface
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sys.stdout.flush()
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sniff(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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