CSIT-235: Switched Port Analyzer mirroring (SPAN) - IPv4

 - add library for SPAN setup
 - add telemetry traffic script and a keyword to run it
 - add "telemetry" folders for python and robot libraries
 - move IPFIX libraries to these new folders
 - add first SPAN test case, mirroring IPv4 ICMP packets

Change-Id: Ibca35f724c13662bf80dce2d7e2649d1a0b8676a
Signed-off-by: selias <samelias@cisco.com>

10 files changed, 260 insertions, 6 deletions

diff --git a/resources/libraries/python/IPFIXSetup.py b/resources/libraries/python/telemetry/IPFIXSetup.py
index f0f35f3bc6..f0f35f3bc6 100644
--- a/resources/libraries/python/IPFIXSetup.py
+++ b/resources/libraries/python/telemetry/IPFIXSetup.py
diff --git a/resources/libraries/python/IPFIXUtil.py b/resources/libraries/python/telemetry/IPFIXUtil.py
index 1b193f8325..1b193f8325 100644
--- a/resources/libraries/python/IPFIXUtil.py
+++ b/resources/libraries/python/telemetry/IPFIXUtil.py
diff --git a/resources/libraries/python/telemetry/SPAN.py b/resources/libraries/python/telemetry/SPAN.py
new file mode 100644
index 0000000000..7933898c02
--- /dev/null
+++ b/resources/libraries/python/telemetry/SPAN.py
@@ -0,0 +1,48 @@
+# Copyright (c) 2016 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""SPAN setup library"""
+
+from resources.libraries.python.topology import Topology
+from resources.libraries.python.VatExecutor import VatTerminal
+
+
+# pylint: disable=too-few-public-methods
+class SPAN(object):
+    """Class contains methods for setting up SPAN mirroring on DUTs."""
+
+    def __init__(self):
+        """Initializer."""
+        pass
+
+    @staticmethod
+    def set_span_mirroring(node, src_if, dst_if):
+        """Set Span mirroring on the specified node.
+
+        :param node: DUT node.
+        :param src_if: Interface to mirror traffic from.
+        :param dst_if: Interface to mirror traffic to.
+        :type node: dict
+        :type src_if: str
+        :type dst_if: str
+        """
+
+        src_if = Topology.get_interface_name(node, src_if)
+        dst_if = Topology.get_interface_name(node, dst_if)
+
+        with VatTerminal(node, json_param=False) as vat:
+            vat.vat_terminal_exec_cmd_from_template('span_create.vat',
+                                                    src_if=src_if,
+                                                    dst_if=dst_if,
+                                                    )
+    # TODO: Update "span_create.vat" to use VAT command, once available
diff --git a/resources/libraries/python/telemetry/__init__.py b/resources/libraries/python/telemetry/__init__.py
new file mode 100644
index 0000000000..5a0e0e1c5e
--- /dev/null
+++ b/resources/libraries/python/telemetry/__init__.py
@@ -0,0 +1,12 @@
+# Copyright (c) 2016 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/resources/libraries/robot/ipfix.robot b/resources/libraries/robot/telemetry/ipfix.robot
index d8840a5261..5248964f29 100644
--- a/resources/libraries/robot/ipfix.robot
+++ b/resources/libraries/robot/telemetry/ipfix.robot
@@ -11,7 +11,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-"""Traffic keywords"""
+"""IPFIX keywords"""
 
 *** Settings ***
 | Library | resources.libraries.python.TrafficScriptExecutor
diff --git a/resources/libraries/robot/telemetry/span.robot b/resources/libraries/robot/telemetry/span.robot
new file mode 100644
index 0000000000..d994e95e3e
--- /dev/null
+++ b/resources/libraries/robot/telemetry/span.robot
@@ -0,0 +1,56 @@
+# Copyright (c) 2016 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+*** Settings ***
+| Library | resources.libraries.python.TrafficScriptExecutor
+| Library | resources.libraries.python.topology.Topology
+| Documentation | SPAN traffic keywords
+
+*** Keywords ***
+| Send Packet And Check Received Copies
+| | [Documentation] | Sends an ARP or ICMP packet from TG to DUT using one\
+| | ... | link, then receive a copy of both the sent packet and the DUT's reply\
+| | ... | on the second link.
+| | ...
+| | ... | *Arguments:*
+| | ...
+| | ... | - tg_node - Node to execute scripts on (TG). Type: dictionary
+| | ... | - tx_src_port - First interface on TG. Type: string
+| | ... | - tx_src_mac - MAC address of the first interface on TG. Type: string
+| | ... | - tx_dst_mac - MAC address of the first interface on DUT. Type: string
+| | ... | - rx_port - Second interface on TG. Type: string
+| | ... | - src_ip - Packet source IP address. Type: string
+| | ... | - dst_ip - Packet destination IP address. Type: string
+| | ... | - ptype - Type of payload, ARP or ICMP. Type: string
+| | ...
+| | ... | *Return:*
+| | ... | - No value returned
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \| Send Packet And Check Received Copies \| ${nodes['TG']} \| eth1 \
+| | ... | \| 8:00:27:ee:fd:b3 \| 08:00:27:a2:52:5b \
+| | ... | \| eth3 \| 192.168.0.2 \| 192.168.0.3 \| ARP \|
+| | ...
+| | [Arguments] | ${tg_node} | ${tx_src_port}
+| | ... | ${tx_src_mac} | ${tx_dst_mac} | ${rx_port}
+| | ... | ${src_ip} | ${dst_ip} | ${ptype}
+| | ${tx_port_name}= | Get interface name | ${tg_node} | ${tx_src_port}
+| | ${rx_port_name}= | Get interface name | ${tg_node} | ${rx_port}
+| | ${args}= | Catenate
+| | ... | --tg_src_mac ${tx_src_mac} --dut_if1_mac ${tx_dst_mac}
+| | ... | --src_ip ${src_ip} --dst_ip ${dst_ip}
+| | ... | --tx_if ${tx_port_name} --rx_if | ${rx_port_name}
+| | ... | --ptype ${ptype}
+| | Run Traffic Script On Node | span_check.py | ${tg_node} |
+| | ... | ${args}
\ No newline at end of file
diff --git a/resources/templates/vat/span_create.vat b/resources/templates/vat/span_create.vat
new file mode 100644
index 0000000000..62c423248b
--- /dev/null
+++ b/resources/templates/vat/span_create.vat
@@ -0,0 +1 @@
+exec set span src {src_if} dst {dst_if}
diff --git a/resources/traffic_scripts/ipfix_check.py b/resources/traffic_scripts/ipfix_check.py
index 14b5a074db..aa04b24038 100755
--- a/resources/traffic_scripts/ipfix_check.py
+++ b/resources/traffic_scripts/ipfix_check.py
@@ -22,7 +22,8 @@ from scapy.layers.inet import IP, TCP, UDP
 from scapy.layers.inet6 import IPv6
 from scapy.layers.l2 import Ether
 
-from resources.libraries.python.IPFIXUtil import IPFIXHandler, IPFIXData
+from resources.libraries.python.telemetry.IPFIXUtil import IPFIXHandler, \
+    IPFIXData
 from resources.libraries.python.PacketVerifier import RxQueue, TxQueue, auto_pad
 from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
 
@@ -81,7 +82,6 @@ def main():
     rxq = RxQueue(tx_if)
 
     # generate simple packet based on arguments
-    ip_version = None
     if valid_ipv4(src_ip) and valid_ipv4(dst_ip):
         ip_version = IP
     elif valid_ipv6(src_ip) and valid_ipv6(dst_ip):
diff --git a/resources/traffic_scripts/ipfix_sessions.py b/resources/traffic_scripts/ipfix_sessions.py
index 2994916144..e7597a894a 100755
--- a/resources/traffic_scripts/ipfix_sessions.py
+++ b/resources/traffic_scripts/ipfix_sessions.py
@@ -22,7 +22,8 @@ from scapy.layers.inet import IP, TCP, UDP
 from scapy.layers.inet6 import IPv6
 from scapy.layers.l2 import Ether
 
-from resources.libraries.python.IPFIXUtil import IPFIXHandler, IPFIXData
+from resources.libraries.python.telemetry.IPFIXUtil import IPFIXHandler, \
+    IPFIXData
 from resources.libraries.python.PacketVerifier import RxQueue, TxQueue, auto_pad
 from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
 
@@ -133,8 +134,6 @@ def main():
     tx_if = args.get_arg('tx_if')
 
     protocol = args.get_arg('protocol')
-    source_port = int(args.get_arg('port'))
-    destination_port = int(args.get_arg('port'))
     count = int(args.get_arg('count'))
     sessions = int(args.get_arg('sessions'))
 
diff --git a/resources/traffic_scripts/span_check.py b/resources/traffic_scripts/span_check.py
new file mode 100755
index 0000000000..66400d9dfb
--- /dev/null
+++ b/resources/traffic_scripts/span_check.py
@@ -0,0 +1,138 @@
+#!/usr/bin/env python
+# Copyright (c) 2016 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Traffic script that sends an IP ICMPv4/ICMPv6 packet from one interface
+to the other. Source and destination IP addresses and source and destination
+MAC addresses are checked in received packet.
+"""
+
+import sys
+import ipaddress
+
+from scapy.layers.inet import IP, ICMP, ARP
+from scapy.layers.inet6 import IPv6, ICMPv6EchoRequest, ICMPv6EchoReply
+from scapy.layers.l2 import Ether
+
+from resources.libraries.python.PacketVerifier import RxQueue, TxQueue, auto_pad
+from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
+
+
+def valid_ipv4(address):
+    """Check if IP address has the correct IPv4 address format.
+
+    :param address: IP address.
+    :type address: str
+    :return: True in case of correct IPv4 address format,
+    otherwise return false.
+    :rtype: bool
+    """
+    try:
+        ipaddress.IPv4Address(unicode(address))
+        return True
+    except (AttributeError, ipaddress.AddressValueError):
+        return False
+
+
+def valid_ipv6(address):
+    """Check if IP address has the correct IPv6 address format.
+
+    :param address: IP address.
+    :type address: str
+    :return: True in case of correct IPv6 address format,
+    otherwise return false.
+    :rtype: bool
+    """
+    try:
+        ipaddress.IPv6Address(unicode(address))
+        return True
+    except (AttributeError, ipaddress.AddressValueError):
+        return False
+
+
+def main():
+    """Send a simple L2 or ICMP packet from one TG interface to DUT, then
+    receive a copy of the packet on the second TG interface, and a copy of
+    the ICMP reply."""
+    args = TrafficScriptArg(
+        ['tg_src_mac', 'src_ip', 'dst_ip', 'dut_if1_mac', 'ptype'])
+
+    src_mac = args.get_arg('tg_src_mac')
+    dst_mac = args.get_arg('dut_if1_mac')
+    src_ip = args.get_arg('src_ip')
+    dst_ip = args.get_arg('dst_ip')
+    tx_if = args.get_arg('tx_if')
+    rx_if = args.get_arg('rx_if')
+    ptype = args.get_arg('ptype')
+
+    rxq = RxQueue(rx_if)
+    txq = TxQueue(tx_if)
+
+    if ptype == "ARP":
+        pkt_raw = (Ether(src=src_mac, dst=dst_mac) /
+                   ARP(hwsrc=src_mac, hwdst="00:00:00:00:00:00",
+                       psrc=src_ip, pdst=dst_ip, op="who-has"))
+    elif ptype == "ICMP":
+        if valid_ipv4(src_ip) and valid_ipv4(dst_ip):
+            pkt_raw = (Ether(src=src_mac, dst=dst_mac) /
+                       IP(src=src_ip, dst=dst_ip) /
+                       ICMP(type="echo-request"))
+        elif valid_ipv6(src_ip) and valid_ipv6(dst_ip):
+            pkt_raw = (Ether(src=src_mac, dst=dst_mac) /
+                       IPv6(src=src_ip, dst=dst_ip) /
+                       ICMPv6EchoRequest())
+        else:
+            raise ValueError("IP not in correct format")
+    else:
+        raise RuntimeError("Unexpected payload type.")
+
+    txq.send(pkt_raw)
+    ether = rxq.recv(2)
+
+    # Receive copy of sent packet.
+    if ether is None:
+        raise RuntimeError("Rx timeout")
+    pkt = auto_pad(pkt_raw)
+    if str(ether) != str(pkt):
+        raise RuntimeError("Mirrored packet does not match packet sent.")
+
+    # Receive copy of reply to sent packet.
+    ether = rxq.recv(2)
+    if ether is None:
+        raise RuntimeError("Rx timeout")
+    if ether.src != dst_mac or ether.dst != src_mac:
+        raise RuntimeError("MAC mismatch in mirrored response.")
+    if ptype == "ARP":
+        if ether['ARP'].op != 2:
+            raise RuntimeError("Mirrored packet is not an ARP reply.")
+        if ether['ARP'].hwsrc != dst_mac or ether['ARP'].hwdst != src_mac:
+            raise RuntimeError("ARP MAC does not match l2 MAC "
+                               "in mirrored response.")
+        if ether['ARP'].psrc != dst_ip or ether['ARP'].pdst != src_ip:
+            raise RuntimeError("ARP IP address mismatch in mirrored response.")
+    elif ptype == "ICMP" and ether.haslayer(IP):
+        if ether['IP'].src != dst_ip or ether['IP'].dst != src_ip:
+            raise RuntimeError("IP address mismatch in mirrored reply.")
+        if ether['ICMP'].type != 0:
+            raise RuntimeError("Mirrored packet is not an ICMP reply.")
+    elif ptype == "ICMP" and ether.haslayer(IPv6):
+        if ether['IPv6'].src != dst_ip or ether['IPv6'].dst != src_ip:
+            raise RuntimeError("IP address mismatch in mirrored reply.")
+        if not ether.haslayer(ICMPv6EchoReply):
+            raise RuntimeError("Mirrored packet is not an ICMP reply.")
+
+    sys.exit(0)
+
+
+if __name__ == "__main__":
+    main()