import sys
import logging
+
+# pylint: disable=no-name-in-module
+# pylint: disable=import-error
logging.getLogger("scapy.runtime").setLevel(logging.ERROR)
-from resources.libraries.python.PacketVerifier import RxQueue, TxQueue,\
- checksum_equal
-from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
-from scapy.layers.inet6 import IPv6, ICMPv6ND_NA, ICMPv6NDOptDstLLAddr
+
+from scapy.layers.inet6 import IPv6, ICMPv6ND_NA, ICMPv6ND_NS
+from scapy.layers.inet6 import ICMPv6NDOptDstLLAddr
from scapy.layers.inet6 import ICMPv6EchoRequest, ICMPv6EchoReply
from scapy.all import Ether
+from resources.libraries.python.PacketVerifier import RxQueue, TxQueue
+from resources.libraries.python.PacketVerifier import checksum_equal
+from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
+
def main():
args = TrafficScriptArg(['src_mac', 'dst_mac', 'src_nh_mac', 'dst_nh_mac',
# send ICMPv6 neighbor advertisement message
pkt_send = (Ether(src=src_mac, dst='ff:ff:ff:ff:ff:ff') /
- IPv6(src=src_ip, dst='ff02::1:ff00:2') /
- ICMPv6ND_NA(tgt=src_ip, R=0) /
- ICMPv6NDOptDstLLAddr(lladdr=src_mac))
+ IPv6(src=src_ip, dst='ff02::1:ff00:2') /
+ ICMPv6ND_NA(tgt=src_ip, R=0) /
+ ICMPv6NDOptDstLLAddr(lladdr=src_mac))
src_sent_packets.append(pkt_send)
src_txq.send(pkt_send)
pkt_send = (Ether(src=dst_mac, dst='ff:ff:ff:ff:ff:ff') /
- IPv6(src=dst_ip, dst='ff02::1:ff00:2') /
- ICMPv6ND_NA(tgt=dst_ip, R=0) /
- ICMPv6NDOptDstLLAddr(lladdr=dst_mac))
+ IPv6(src=dst_ip, dst='ff02::1:ff00:2') /
+ ICMPv6ND_NA(tgt=dst_ip, R=0) /
+ ICMPv6NDOptDstLLAddr(lladdr=dst_mac))
dst_sent_packets.append(pkt_send)
dst_txq.send(pkt_send)
# send ICMPv6 echo request from first TG interface
pkt_send = (Ether(src=src_mac, dst=src_nh_mac) /
- IPv6(src=src_ip, dst=dst_ip, hlim=hop_limit) /
- ICMPv6EchoRequest(id=echo_id, seq=echo_seq))
+ IPv6(src=src_ip, dst=dst_ip, hlim=hop_limit) /
+ ICMPv6EchoRequest(id=echo_id, seq=echo_seq))
src_sent_packets.append(pkt_send)
src_txq.send(pkt_send)
# receive ICMPv6 echo request on second TG interface
- ether = dst_rxq.recv(2, dst_sent_packets)
- if ether is None:
- raise RuntimeError('ICMPv6 echo reply Rx timeout')
+ while True:
+ ether = dst_rxq.recv(2, dst_sent_packets)
+ if ether is None:
+ raise RuntimeError('ICMPv6 echo reply Rx timeout')
+
+ if ether.haslayer(ICMPv6ND_NS):
+ # read another packet in the queue if the current one is ICMPv6ND_NS
+ continue
+ else:
+ # otherwise process the current packet
+ break
if not ether.haslayer(IPv6):
- raise RuntimeError('Unexpected packet with no IPv6 received {0}'.format(
- ether.__repr__()))
+ raise RuntimeError('Unexpected packet with no IPv6 received: {0}'.
+ format(ether.__repr__()))
- ipv6 = ether['IPv6']
+ ipv6 = ether[IPv6]
# verify hop limit processing
if ipv6.hlim != (hop_limit - hop_num):
- raise RuntimeError(
- 'Invalid hop limit {0} should be {1}'.format(ipv6.hlim,
- hop_limit - hop_num))
+ raise RuntimeError('Invalid hop limit {0} should be {1}'.
+ format(ipv6.hlim,hop_limit - hop_num))
if not ipv6.haslayer(ICMPv6EchoRequest):
- raise RuntimeError(
- 'Unexpected packet with no IPv6 ICMP received {0}'.format(
- ipv6.__repr__()))
+ raise RuntimeError('Unexpected packet with no IPv6 ICMP received {0}'.
+ format(ipv6.__repr__()))
- icmpv6 = ipv6['ICMPv6 Echo Request']
+ icmpv6 = ipv6[ICMPv6EchoRequest]
# check identifier and sequence number
if icmpv6.id != echo_id or icmpv6.seq != echo_seq:
- raise RuntimeError(
- 'Invalid ICMPv6 echo reply received ID {0} seq {1} should be ' \
- 'ID {2} seq {3}'.format(icmpv6.id, icmpv6.seq, echo_id, echo_seq))
+ raise RuntimeError('Invalid ICMPv6 echo reply received ID {0} '
+ 'seq {1} should be ID {2} seq {3}'.
+ format(icmpv6.id, icmpv6.seq, echo_id, echo_seq))
# verify checksum
cksum = icmpv6.cksum
del icmpv6.cksum
tmp = ICMPv6EchoRequest(str(icmpv6))
if not checksum_equal(tmp.cksum, cksum):
- raise RuntimeError(
- 'Invalid checksum {0} should be {1}'.format(cksum, tmp.cksum))
+ raise RuntimeError('Invalid checksum {0} should be {1}'.
+ format(cksum, tmp.cksum))
# send ICMPv6 echo reply from second TG interface
pkt_send = (Ether(src=dst_mac, dst=dst_nh_mac) /
- IPv6(src=dst_ip, dst=src_ip) /
- ICMPv6EchoReply(id=echo_id, seq=echo_seq))
+ IPv6(src=dst_ip, dst=src_ip) /
+ ICMPv6EchoReply(id=echo_id, seq=echo_seq))
dst_sent_packets.append(pkt_send)
dst_txq.send(pkt_send)
# receive ICMPv6 echo reply on first TG interface
- ether = src_rxq.recv(2, src_sent_packets)
- if ether is None:
- raise RuntimeError('ICMPv6 echo reply Rx timeout')
+ while True:
+ ether = src_rxq.recv(2, src_sent_packets)
+ if ether is None:
+ raise RuntimeError('ICMPv6 echo reply Rx timeout')
+
+ if ether.haslayer(ICMPv6ND_NS):
+ # read another packet in the queue if the current one is ICMPv6ND_NS
+ continue
+ else:
+ # otherwise process the current packet
+ break
if not ether.haslayer(IPv6):
- 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]
# verify hop limit processing
if ipv6.hlim != (hop_limit - hop_num):
- raise RuntimeError(
- 'Invalid hop limit {0} should be {1}'.format(ipv6.hlim,
- hop_limit - hop_num))
+ raise RuntimeError('Invalid hop limit {0} should be {1}'.
+ format(ipv6.hlim, hop_limit - hop_num))
if not ipv6.haslayer(ICMPv6EchoReply):
- raise RuntimeError(
- 'Unexpected packet with no IPv6 ICMP received {0}'.format(
- ipv6.__repr__()))
+ raise RuntimeError('Unexpected packet with no IPv6 ICMP received {0}'.
+ format(ipv6.__repr__()))
- icmpv6 = ipv6['ICMPv6 Echo Reply']
+ icmpv6 = ipv6[ICMPv6EchoReply]
# check identifier and sequence number
if icmpv6.id != echo_id or icmpv6.seq != echo_seq:
- raise RuntimeError(
- 'Invalid ICMPv6 echo reply received ID {0} seq {1} should be ' \
- 'ID {2} seq {3}'.format(icmpv6.id, icmpv6.seq, echo_id, echo_seq))
+ raise RuntimeError('Invalid ICMPv6 echo reply received ID {0} '
+ 'seq {1} should be ID {2} seq {3}'.
+ format(icmpv6.id, icmpv6.seq, echo_id, echo_seq))
# verify checksum
cksum = icmpv6.cksum
del icmpv6.cksum
tmp = ICMPv6EchoReply(str(icmpv6))
if not checksum_equal(tmp.cksum, cksum):
- raise RuntimeError(
- 'Invalid checksum {0} should be {1}'.format(cksum, tmp.cksum))
+ raise RuntimeError('Invalid checksum {0} should be {1}'.
+ format(cksum, tmp.cksum))
sys.exit(0)
+
if __name__ == "__main__":
main()
Code Review / csit.git / blobdiff