# See the License for the specific language governing permissions and
# limitations under the License.
-"""Traffic script that sends an ip icmp packet
-from one interface to the other"""
+"""Traffic script that sends an IP ICMPv4/ICMPv6 packet from one interface to
+the other one. Dot1q or Dot1ad tagging of the ethernet frame can be set.
+"""
import sys
+import ipaddress
+
+from scapy.layers.l2 import Ether, Dot1Q
+from scapy.layers.inet import ICMP, IP
+from scapy.layers.inet6 import IPv6, ICMPv6EchoRequest, ICMPv6ND_NS
+
from resources.libraries.python.PacketVerifier import RxQueue, TxQueue
from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
-from scapy.layers.inet import ICMP, IP
-from scapy.all import Ether
+
+
+def valid_ipv4(ip):
+ """Check if IP address has the correct IPv4 address format.
+
+ :param ip: IP address.
+ :type ip: str
+ :return: True in case of correct IPv4 address format,
+ otherwise return false.
+ :rtype: bool
+ """
+ try:
+ ipaddress.IPv4Address(unicode(ip))
+ return True
+ except (AttributeError, ipaddress.AddressValueError):
+ return False
+
+
+def valid_ipv6(ip):
+ """Check if IP address has the correct IPv6 address format.
+
+ :param ip: IP address.
+ :type ip: str
+ :return: True in case of correct IPv6 address format,
+ otherwise return false.
+ :rtype: bool
+ """
+ try:
+ ipaddress.IPv6Address(unicode(ip))
+ return True
+ except (AttributeError, ipaddress.AddressValueError):
+ return False
def main():
- """ Send IP icmp packet from one traffic generator interface to the other"""
- args = TrafficScriptArg(['src_mac', 'dst_mac', 'src_ip', 'dst_ip'])
+ """Send IP ICMPv4/ICMPv6 packet from one traffic generator interface to
+ the other one. Dot1q or Dot1ad tagging of the ethernet frame can be set.
+ """
+ args = TrafficScriptArg(['src_mac', 'dst_mac', 'src_ip', 'dst_ip'],
+ ['encaps', 'vlan1', 'vlan2', 'encaps_rx',
+ 'vlan1_rx', 'vlan2_rx'])
src_mac = args.get_arg('src_mac')
dst_mac = args.get_arg('dst_mac')
src_ip = args.get_arg('src_ip')
dst_ip = args.get_arg('dst_ip')
+
+ encaps = args.get_arg('encaps')
+ vlan1 = args.get_arg('vlan1')
+ vlan2 = args.get_arg('vlan2')
+ encaps_rx = args.get_arg('encaps_rx')
+ vlan1_rx = args.get_arg('vlan1_rx')
+ vlan2_rx = args.get_arg('vlan2_rx')
+
tx_if = args.get_arg('tx_if')
rx_if = args.get_arg('rx_if')
txq = TxQueue(tx_if)
sent_packets = []
-
+ ip_format = ''
+ icmp_format = ''
# Create empty ip ICMP packet and add padding before sending
- pkt_raw = Ether(src=src_mac, dst=dst_mac) / \
- IP(src=src_ip, dst=dst_ip) / \
- ICMP()
+ if valid_ipv4(src_ip) and valid_ipv4(dst_ip):
+ if encaps == 'Dot1q':
+ pkt_raw = (Ether(src=src_mac, dst=dst_mac) /
+ Dot1Q(vlan=int(vlan1)) /
+ IP(src=src_ip, dst=dst_ip) /
+ ICMP())
+ elif encaps == 'Dot1ad':
+ pkt_raw = (Ether(src=src_mac, dst=dst_mac, type=0x88A8) /
+ Dot1Q(vlan=int(vlan1), type=0x8100) /
+ Dot1Q(vlan=int(vlan2)) /
+ IP(src=src_ip, dst=dst_ip) /
+ ICMP())
+ else:
+ pkt_raw = (Ether(src=src_mac, dst=dst_mac) /
+ IP(src=src_ip, dst=dst_ip) /
+ ICMP())
+ ip_format = IP
+ icmp_format = ICMP
+ elif valid_ipv6(src_ip) and valid_ipv6(dst_ip):
+ if encaps == 'Dot1q':
+ pkt_raw = (Ether(src=src_mac, dst=dst_mac) /
+ Dot1Q(vlan=int(vlan1)) /
+ IPv6(src=src_ip, dst=dst_ip) /
+ ICMPv6EchoRequest())
+ elif encaps == 'Dot1ad':
+ pkt_raw = (Ether(src=src_mac, dst=dst_mac, type=0x88A8) /
+ Dot1Q(vlan=int(vlan1), type=0x8100) /
+ Dot1Q(vlan=int(vlan2)) /
+ IPv6(src=src_ip, dst=dst_ip) /
+ ICMPv6EchoRequest())
+ else:
+ pkt_raw = (Ether(src=src_mac, dst=dst_mac) /
+ IPv6(src=src_ip, dst=dst_ip) /
+ ICMPv6EchoRequest())
+ ip_format = IPv6
+ icmp_format = ICMPv6EchoRequest
+ else:
+ raise ValueError("IP(s) not in correct format")
# Send created packet on one interface and receive on the other
sent_packets.append(pkt_raw)
txq.send(pkt_raw)
- ether = rxq.recv(1)
+ # Receive ICMP / ICMPv6 echo reply
+ while True:
+ ether = rxq.recv(2,)
+ if ether is None:
+ raise RuntimeError('ICMP echo 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
- # Check whether received packet contains layers Ether, IP and ICMP
- if ether is None:
- rxq._proc.terminate()
- raise RuntimeError('ICMPv6 echo reply Rx timeout')
+ # Check whether received packet contains layers IP/IPv6 and
+ # ICMP/ICMPv6EchoRequest
+ if encaps_rx:
+ if encaps_rx == 'Dot1q':
+ if not vlan1_rx:
+ vlan1_rx = vlan1
+ if not ether.haslayer(Dot1Q):
+ raise RuntimeError('Not VLAN tagged Eth frame received:\n{0}'.
+ format(ether.__repr__()))
+ elif ether[Dot1Q].vlan != int(vlan1_rx):
+ raise RuntimeError('Ethernet frame with wrong VLAN tag ({}) '
+ 'received ({} expected):\n{}'.
+ format(ether[Dot1Q].vlan, vlan1_rx,
+ ether.__repr__()))
+ elif encaps_rx == 'Dot1ad':
+ if not vlan1_rx:
+ vlan1_rx = vlan1
+ if not vlan2_rx:
+ vlan2_rx = vlan2
+ # TODO
+ raise RuntimeError('Encapsulation {0} not implemented yet.'.
+ format(encaps_rx))
+ else:
+ raise RuntimeError('Unsupported encapsulation expected: {0}'.
+ format(encaps_rx))
- if not ether.haslayer(IP):
- rxq._proc.terminate()
- raise RuntimeError(
- 'Not an IP packet received {0}'.format(ether.__repr__()))
+ if not ether.haslayer(ip_format):
+ raise RuntimeError('Not an IP/IPv6 packet received:\n{0}'.
+ format(ether.__repr__()))
- if not ether.haslayer(ICMP):
- rxq._proc.terminate()
- raise RuntimeError(
- 'Not an ICMP packet received {0}'.format(ether.__repr__()))
+ if not ether.haslayer(icmp_format):
+ raise RuntimeError('Not an ICMP/ICMPv6EchoRequest packet received:\n'
+ '{0}'.format(ether.__repr__()))
- rxq._proc.terminate()
sys.exit(0)
+
if __name__ == "__main__":
main()
Code Review / csit.git / blobdiff