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authorZdeno Olsovsky <zolsovsk@cisco.com>2016-07-28 15:04:54 +0200
committerJan Gelety <jgelety@cisco.com>2016-08-25 22:16:46 +0000
commit1942363fa62b6a079ae5552d20c90eb55f0033d9 (patch)
tree8eb689a564db5036f6f7cb09e97f0a44555af56e /resources/traffic_scripts
parentf2711a847cd8de8dadce1049747e78f96bcae031 (diff)
CSIT-237: VPN routed forwarding (VRF) - baseline for IPv6
Change-Id: I5c3053c692df29255a1da22a66f7ac282e3d5624 Signed-off-by: Zdeno Olsovsky <zolsovsk@cisco.com>
Diffstat (limited to 'resources/traffic_scripts')
-rwxr-xr-xresources/traffic_scripts/send_icmp_wait_for_reply.py94
1 files changed, 80 insertions, 14 deletions
diff --git a/resources/traffic_scripts/send_icmp_wait_for_reply.py b/resources/traffic_scripts/send_icmp_wait_for_reply.py
index 3c8b71abc8..a77f15efc2 100755
--- a/resources/traffic_scripts/send_icmp_wait_for_reply.py
+++ b/resources/traffic_scripts/send_icmp_wait_for_reply.py
@@ -12,22 +12,33 @@
# See the License for the specific language governing permissions and
# limitations under the License.
-"""Traffic script that sends an IP ICMPv4."""
+"""Traffic script that sends an IP ICMPv4 or ICMPv6."""
import sys
+import ipaddress
from scapy.layers.inet import ICMP, IP
+from scapy.layers.inet6 import IPv6, ICMPv6EchoRequest
from scapy.all import Ether
from resources.libraries.python.PacketVerifier import RxQueue, TxQueue
from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
-def is_icmp_reply(pkt):
+def is_icmp_reply(pkt, ipformat):
"""Return True if pkt is echo reply, else return False. If exception occurs
- return False."""
+ return False.
+
+ :param pkt: Packet.
+ :param ipformat: Dictionary of names to distinguish IPv4 and IPv6.
+ :type pkt: dict
+ :type ipformat: dict
+ :rtype: bool
+ """
+ #pylint: disable=bare-except
try:
- if pkt['IP']['ICMP'].type == 0: # 0 - echo-reply
+ if pkt[ipformat['IPType']][ipformat['ICMP_rep']].type == \
+ ipformat['Type']:
return True
else:
return False
@@ -35,16 +46,59 @@ def is_icmp_reply(pkt):
return False
-def address_check(request, reply):
+def address_check(request, reply, ipformat):
"""Compare request packet source address with reply destination address
- and vice versa. If exception occurs return False."""
+ and vice versa. If exception occurs return False.
+
+ :param request: Sent packet containing request.
+ :param reply: Received packet containing reply.
+ :param ipformat: Dictionary of names to distinguish IPv4 and IPv6.
+ :type request: dict
+ :type reply: dict
+ :type ipformat: dict
+ :rtype: bool
+ """
+ #pylint: disable=bare-except
try:
- return reply['IP'].src == request['IP'].dst \
- and reply['IP'].dst == request['IP'].src
+ r_src = reply[ipformat['IPType']].src == request[ipformat['IPType']].dst
+ r_dst = reply[ipformat['IPType']].dst == request[ipformat['IPType']].src
+ return r_src and r_dst
except:
return False
+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 ICMP echo request and wait for ICMP echo reply. It ignores all other
packets."""
@@ -65,21 +119,33 @@ def main():
sent_packets = []
# Create empty ip ICMP packet
- icmp_request = (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):
+ icmp_request = (Ether(src=src_mac, dst=dst_mac) /
+ IP(src=src_ip, dst=dst_ip) /
+ ICMP())
+ ip_format = {'IPType': 'IP', 'ICMP_req': 'ICMP',
+ 'ICMP_rep': 'ICMP', 'Type': 0}
+ elif valid_ipv6(src_ip) and valid_ipv6(dst_ip):
+ icmp_request = (Ether(src=src_mac, dst=dst_mac) /
+ IPv6(src=src_ip, dst=dst_ip) /
+ ICMPv6EchoRequest())
+ ip_format = {'IPType': 'IPv6', 'ICMP_req': 'ICMPv6 Echo Request',
+ 'ICMP_rep': 'ICMPv6 Echo Reply', 'Type': 129}
+ else:
+ raise ValueError("IP not in correct format")
+
# Send created packet on the interface
sent_packets.append(icmp_request)
txq.send(icmp_request)
for _ in range(1000):
- icmp_reply = rxq.recv(wait_step)
+ icmp_reply = rxq.recv(wait_step, ignore=sent_packets)
if icmp_reply is None:
timeout -= wait_step
if timeout < 0:
raise RuntimeError("ICMP echo Rx timeout")
- elif is_icmp_reply(icmp_reply):
- if address_check(icmp_request, icmp_reply):
+ elif is_icmp_reply(icmp_reply, ip_format):
+ if address_check(icmp_request, icmp_reply, ip_format):
break
else:
raise RuntimeError("Max packet count limit reached")