CSIT-227, CSIT-240 IPv4/IPv6 Multipath routing tests

  - add IPv4 Equal-cost multipath routing test
  - add IPv6 Equal-cost multipath routing test

Change-Id: I62eaf9983b7767e124f80af7d8c8652ffc460cf8
Signed-off-by: Patrik Hrnciar <phrnciar@cisco.com>

4 files changed, 188 insertions, 4 deletions

diff --git a/resources/libraries/python/Routing.py b/resources/libraries/python/Routing.py
index ff675f39a9..73c58e2053 100644
--- a/resources/libraries/python/Routing.py
+++ b/resources/libraries/python/Routing.py
@@ -19,14 +19,14 @@ from resources.libraries.python.ssh import exec_cmd_no_error
 
 
 class Routing(object):
-
     """Routing utilities."""
 
     # pylint: disable=too-many-arguments
     @staticmethod
     def vpp_route_add(node, network, prefix_len, gateway=None,
                       interface=None, use_sw_index=True, resolve_attempts=10,
-                      count=1, vrf=None, lookup_vrf=None):
+                      count=1, vrf=None, lookup_vrf=None, multipath=False,
+                      weight=None):
         """Add route to the VPP node.
 
         :param node: Node to add route on.
@@ -40,6 +40,8 @@ class Routing(object):
         :param count: number of IP addresses to add starting from network IP
         with same prefix (increment is 1). If None, then is not used.
         :param lookup_vrf: VRF table ID for lookup.
+        :param multipath: Enable multipath routing.
+        :param weight: Weight value for unequal cost multipath routing.
         :type node: dict
         :type network: str
         :type prefix_len: int
@@ -50,6 +52,8 @@ class Routing(object):
         :type count: int
         :type vrf: int
         :type lookup_vrf: int
+        :type multipath: bool
+        :type weight: int
         """
         if use_sw_index:
             int_cmd = ('sw_if_index {}'.
@@ -69,6 +73,10 @@ class Routing(object):
 
         lookup_vrf = 'lookup-in-vrf {}'.format(lookup_vrf) if lookup_vrf else ''
 
+        multipath = 'multipath' if multipath else ''
+
+        weight = 'weight {}'.format(weight) if weight else ''
+
         with VatTerminal(node, json_param=False) as vat:
             vat.vat_terminal_exec_cmd_from_template('add_route.vat',
                                                     network=network,
@@ -78,7 +86,9 @@ class Routing(object):
                                                     interface=int_cmd,
                                                     resolve_attempts=rap,
                                                     count=cnt,
-                                                    lookup_vrf=lookup_vrf)
+                                                    lookup_vrf=lookup_vrf,
+                                                    multipath=multipath,
+                                                    weight=weight)
 
     @staticmethod
     def add_fib_table(node, network, prefix_len, fib_id, place):
diff --git a/resources/libraries/robot/traffic.robot b/resources/libraries/robot/traffic.robot
index 2522444e35..f21831fe5a 100644
--- a/resources/libraries/robot/traffic.robot
+++ b/resources/libraries/robot/traffic.robot
@@ -388,3 +388,46 @@
 | | ...                 | --src_ip | ${src_ip} | --dst_ip | ${tgt_ip}
 | | Run Keyword And Expect Error | ARP reply timeout
 | | ... | Run Traffic Script On Node | arp_request.py | ${tg_node} | ${args}
+
+| Send Packets And Check Multipath Routing
+| | [Documentation] | Send 100 IP ICMP packets traffic and check if it is\
+| | ...             | divided into two paths.
+| | ...
+| | ... | *Arguments:*
+| | ...
+| | ... | _NOTE:_ Arguments are based on topology:
+| | ... | TG(if1)->(if1)DUT(if2)->TG(if2)
+| | ...
+| | ... | - tg_node - Node to execute scripts on (TG). Type: dictionary
+| | ... | - src_port - Interface of TG-if1. Type: string
+| | ... | - dst_port - Interface of TG-if2. Type: string
+| | ... | - src_ip - IP of source interface (TG-if1). Type: string
+| | ... | - dst_ip - IP of destination interface (TG-if2). Type: string
+| | ... | - tx_src_mac - MAC address of TG-if1. Type: string
+| | ... | - tx_dst_mac - MAC address of DUT-if1. Type: string
+| | ... | - rx_src_mac - MAC address of DUT-if2. Type: string
+| | ... | - rx_dst_mac_1 - MAC address of interface for path 1. Type: string
+| | ... | - rx_dst_mac_2 - MAC address of interface for path 2. Type: string
+| | ...
+| | ... | *Return:*
+| | ... | - No value returned
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \| Send Packet And Check Multipath Routing \| ${nodes['TG']} \
+| | ... | \| eth2 \| eth3 \| 16.0.0.1 \| 32.0.0.1 \
+| | ... | \| 08:00:27:cc:4f:54 \| 08:00:27:c9:6a:d5 \| 08:00:27:54:59:f9 \
+| | ... | \| 02:00:00:00:00:02 \| 02:00:00:00:00:03 \|
+| | ...
+| | [Arguments] | ${tg_node} | ${src_port} | ${dst_port} | ${src_ip} | ${dst_ip}
+| | ...         | ${tx_src_mac} | ${tx_dst_mac} | ${rx_src_mac}
+| | ...         | ${rx_dst_mac_1} | ${rx_dst_mac_2}
+| | ${src_port_name}= | Get interface name | ${tg_node} | ${src_port}
+| | ${dst_port_name}= | Get interface name | ${tg_node} | ${dst_port}
+| | ${args}= | Catenate | --tx_if | ${src_port_name}
+| | ... | --rx_if | ${dst_port_name} | --src_ip | ${src_ip}
+| | ... | --dst_ip | ${dst_ip} | --tg_if1_mac | ${tx_src_mac}
+| | ... | --dut_if1_mac | ${tx_dst_mac} | --dut_if2_mac | ${rx_src_mac}
+| | ... | --path_1_mac | ${rx_dst_mac_1} | --path_2_mac | ${rx_dst_mac_2}
+| | Run Traffic Script On Node | send_icmp_check_multipath.py | ${tg_node}
+| | ... | ${args}
diff --git a/resources/templates/vat/add_route.vat b/resources/templates/vat/add_route.vat
index 9fe89526e6..8411bfbdfb 100644
--- a/resources/templates/vat/add_route.vat
+++ b/resources/templates/vat/add_route.vat
@@ -1 +1 @@
-ip_add_del_route {network}/{prefix_length} {via} {vrf} {interface} {resolve_attempts} {count} {lookup_vrf}
+ip_add_del_route {network}/{prefix_length} {via} {vrf} {interface} {resolve_attempts} {count} {lookup_vrf} {multipath} {weight}
\ No newline at end of file
diff --git a/resources/traffic_scripts/send_icmp_check_multipath.py b/resources/traffic_scripts/send_icmp_check_multipath.py
new file mode 100755
index 0000000000..4e39efdfcd
--- /dev/null
+++ b/resources/traffic_scripts/send_icmp_check_multipath.py
@@ -0,0 +1,131 @@
+#!/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 packets traffic
+and check if it is divided into two paths."""
+
+import sys
+import ipaddress
+
+from scapy.layers.inet import ICMP, IP
+from scapy.layers.inet6 import IPv6
+from scapy.all import Ether
+from scapy.layers.inet6 import ICMPv6EchoRequest
+
+from resources.libraries.python.PacketVerifier import RxQueue, TxQueue
+from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
+
+
+def valid_ipv4(ip):
+    try:
+        ipaddress.IPv4Address(unicode(ip))
+        return True
+    except (AttributeError, ipaddress.AddressValueError):
+        return False
+
+
+def valid_ipv6(ip):
+    try:
+        ipaddress.IPv6Address(unicode(ip))
+        return True
+    except (AttributeError, ipaddress.AddressValueError):
+        return False
+
+
+def main():
+    """Send 100 IP ICMP packets traffic and check if it is divided into
+    two paths."""
+    args = TrafficScriptArg(
+        ['src_ip', 'dst_ip', 'tg_if1_mac', 'dut_if1_mac', 'dut_if2_mac',
+         'path_1_mac', 'path_2_mac'])
+
+    src_ip = args.get_arg('src_ip')
+    dst_ip = args.get_arg('dst_ip')
+    tg_if1_mac = args.get_arg('tg_if1_mac')
+    dut_if1_mac = args.get_arg('dut_if1_mac')
+    dut_if2_mac = args.get_arg('dut_if2_mac')
+    path_1_mac = args.get_arg('path_1_mac')
+    path_2_mac = args.get_arg('path_2_mac')
+    tx_if = args.get_arg('tx_if')
+    rx_if = args.get_arg('rx_if')
+    path_1_counter = 0
+    path_2_counter = 0
+
+    rxq = RxQueue(rx_if)
+    txq = TxQueue(tx_if)
+    sent_packets = []
+    ip_format = ''
+    pkt_raw = ''
+    separator = ''
+
+    if valid_ipv4(src_ip):
+        separator = '.'
+    elif valid_ipv6(src_ip):
+        separator = ':'
+    else:
+        raise ValueError("Source address not in correct format")
+
+    src_ip_base = (src_ip.rsplit(separator, 1))[0] + separator
+
+    for i in range(1, 101):
+        if valid_ipv4(src_ip) and valid_ipv4(dst_ip):
+            pkt_raw = (Ether(src=tg_if1_mac, dst=dut_if1_mac) /
+                       IP(src=src_ip_base+str(i), dst=dst_ip) /
+                       ICMP())
+            ip_format = 'IP'
+        elif valid_ipv6(src_ip) and valid_ipv6(dst_ip):
+            pkt_raw = (Ether(src=tg_if1_mac, dst=dut_if1_mac) /
+                       IPv6(src=src_ip_base+str(i), dst=dst_ip) /
+                       ICMPv6EchoRequest())
+            ip_format = 'IPv6'
+        else:
+            raise ValueError("IP not in correct format")
+
+        sent_packets.append(pkt_raw)
+        txq.send(pkt_raw)
+        ether = rxq.recv(2)
+
+        if ether is None:
+            raise RuntimeError("ICMP echo Rx timeout")
+        if not ether.haslayer(ip_format):
+            raise RuntimeError("Not an IP packet received {0}"
+                               .format(ether.__repr__()))
+
+        if ether['Ethernet'].src != dut_if2_mac:
+            raise RuntimeError("Source MAC address error")
+
+        if ether['Ethernet'].dst == path_1_mac:
+            path_1_counter += 1
+        elif ether['Ethernet'].dst == path_2_mac:
+            path_2_counter += 1
+        else:
+            raise RuntimeError("Destination MAC address error")
+
+    if (path_1_counter + path_2_counter) != 100:
+        raise RuntimeError("Packet loss: recevied only {} packets of 100 "
+                           .format(path_1_counter + path_2_counter))
+
+    if path_1_counter == 0:
+        raise RuntimeError("Path 1 error!")
+
+    if path_2_counter == 0:
+        raise RuntimeError("Path 2 error!")
+
+    print "Path_1 counter: {}".format(path_1_counter)
+    print "Path_2 counter: {}".format(path_2_counter)
+
+    sys.exit(0)
+
+if __name__ == "__main__":
+    main()