"""Traffic script for IPv6 sweep ping."""
-import sys
import logging
import os
+import sys
+
+# pylint: disable=no-name-in-module
+# pylint: disable=import-error
logging.getLogger("scapy.runtime").setLevel(logging.ERROR)
+
+from scapy.all import Ether
+from scapy.layers.inet6 import IPv6, ICMPv6ND_NA, ICMPv6ND_NS
+from scapy.layers.inet6 import ICMPv6NDOptDstLLAddr
+from scapy.layers.inet6 import ICMPv6EchoRequest, ICMPv6EchoReply
+
from resources.libraries.python.PacketVerifier import RxQueue, TxQueue
+from resources.libraries.python.PacketVerifier import checksum_equal
from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
-from scapy.layers.inet6 import IPv6, ICMPv6ND_NA, ICMPv6NDOptDstLLAddr
-from scapy.layers.inet6 import ICMPv6EchoRequest, ICMPv6EchoReply
-from scapy.all import Ether
def main():
# send ICMPv6 neighbor advertisement message
sent_packets = []
pkt_send = (Ether(src=src_mac, dst=dst_mac) /
- IPv6(src=src_ip, dst=dst_ip) /
- ICMPv6ND_NA(tgt=src_ip, R=0) /
- ICMPv6NDOptDstLLAddr(lladdr=src_mac))
+ IPv6(src=src_ip, dst=dst_ip) /
+ ICMPv6ND_NA(tgt=src_ip, R=0) /
+ ICMPv6NDOptDstLLAddr(lladdr=src_mac))
sent_packets.append(pkt_send)
txq.send(pkt_send)
# send ICMPv6 echo request with incremented data length and receive ICMPv6
# echo reply
- for echo_seq in range(start_size, end_size+1, step):
+ for echo_seq in range(start_size, end_size + 1, step):
pkt_send = (Ether(src=src_mac, dst=dst_mac) /
- IPv6(src=src_ip, dst=dst_ip) /
- ICMPv6EchoRequest(id=echo_id, seq=echo_seq,
- data=data[0:echo_seq]))
+ IPv6(src=src_ip, dst=dst_ip) /
+ ICMPv6EchoRequest(id=echo_id, seq=echo_seq,
+ data=data[0:echo_seq]))
sent_packets.append(pkt_send)
txq.send(pkt_send)
- ether = rxq.recv(ignore=sent_packets)
- if ether is None:
- rxq._proc.terminate()
- raise RuntimeError(
- 'ICMPv6 echo reply seq {0} Rx timeout'.format(echo_seq))
+ while True:
+ ether = rxq.recv(ignore=sent_packets)
+ if ether is None:
+ raise RuntimeError('ICMPv6 echo reply seq {0} '
+ 'Rx timeout'.format(echo_seq))
+
+ if ether.haslayer(ICMPv6ND_NS):
+ # read another packet in the queue in case of ICMPv6ND_NS packet
+ continue
+ else:
+ # otherwise process the current packet
+ break
if not ether.haslayer(IPv6):
- rxq._proc.terminate()
- raise RuntimeError(
- 'Unexpected packet with no IPv6 received {0}'.format(
- ether.__repr__()))
+ raise RuntimeError('Unexpected packet with no IPv6 layer '
+ 'received: {0}'.format(ether.__repr__()))
- ipv6 = ether['IPv6']
+ ipv6 = ether[IPv6]
if not ipv6.haslayer(ICMPv6EchoReply):
- rxq._proc.terminate()
- raise RuntimeError(
- 'Unexpected packet with no IPv6 ICMP received {0}'.format(
- ipv6.__repr__()))
+ raise RuntimeError('Unexpected packet with no ICMPv6 echo reply '
+ 'layer received: {0}'.format(ipv6.__repr__()))
- icmpv6 = ipv6['ICMPv6 Echo Reply']
+ icmpv6 = ipv6[ICMPv6EchoReply]
if icmpv6.id != echo_id or icmpv6.seq != echo_seq:
- rxq._proc.terminate()
- raise RuntimeError(
- 'Invalid ICMPv6 echo reply received ID {0} seq {1} should be ' +
- 'ID {2} seq {3}, {0}'.format(icmpv6.id, icmpv6.seq, echo_id,
- echo_seq))
+ raise RuntimeError('ICMPv6 echo reply with invalid data received: '
+ 'ID {0} seq {1} should be ID {2} seq {3}, {0}'.
+ format(icmpv6.id, icmpv6.seq, echo_id,
+ echo_seq))
cksum = icmpv6.cksum
del icmpv6.cksum
tmp = ICMPv6EchoReply(str(icmpv6))
- if tmp.cksum != cksum:
- rxq._proc.terminate()
- raise RuntimeError(
- 'Invalid checksum {0} should be {1}'.format(cksum, tmp.cksum))
+ if not checksum_equal(tmp.cksum, cksum):
+ raise RuntimeError('Invalid checksum: {0} should be {1}'.
+ format(cksum, tmp.cksum))
+
+ sent_packets.remove(pkt_send)
- rxq._proc.terminate()
sys.exit(0)
+
if __name__ == "__main__":
main()