ansible tests: Add test for the neighbour MAC change update

ansible/roles/test/files/neighbour/neigh_test.sh

@@ -0,0 +1,115 @@
+#!/bin/bash -ex
+
+# Test for the issue #19 (https://github.com/Azure/SONiC/issues/19)
+# H/w config:
+#    +--------+      +-------+
+#    |  Host  X<---->Y  DUT  |
+#    +--------+      +-------+
+#
+# S/w config:
+# iface            - the name of the interface X
+# dut_host         - ip/hostname of the DUT management interface
+# dut_connected_ip - ip/hostname on the interface Y
+# dut_user         - user on DUT (capable to run docker, has Host in known_hosts
+# Call syntax:
+# neigh_test.sh admin arc-switch1027 20.0.0.1 20.0.0.2
+#                $1        $2           $3      $4
+
+# default values
+iface=eth2
+iface_ip=20.0.0.2
+dut_host=arc-switch1027
+dut_connected_ip=20.0.0.1
+dut_user=admin
+
+mac1=00:c0:ca:c0:1a:05
+mac2=00:c0:ca:c0:1a:06
+
+if [ ! -z $4 ]; then
+    iface_ip=$4
+fi
+
+if [ ! -z $3 ]; then
+    dut_connected_ip=$3
+fi
+
+if [ ! -z $2 ]; then
+    dut_host=$2
+fi
+
+if [ ! -z $1 ]; then
+    dut_user=$1
+fi
+
+mac1=00:c0:ca:c0:1a:05
+mac2=00:c0:ca:c0:1a:06
+
+function ping_dut()
+{
+    ping ${dut_connected_ip} -c 3 -I ${iface} >/dev/null;
+}
+
+# get mac of given interface
+# $1 interface to get mac on
+# ret: mac as string
+function get_mac()
+{
+    local mac=`ifconfig ${1} | grep -o -E '([[:xdigit:]]{1,2}:){5}[[:xdigit:]]{1,2}'`
+    #read mac < /sys/class/net/${1}/address
+    #ifconfig ${1} | grep ether | awk '{print $2}' net-tools > 2.0
+    echo ${mac};
+}
+
+# set mac on local interface
+# $1 - interface
+# $2 - mac to set
+function set_mac()
+{
+    ifconfig ${1} down; ifconfig ${1} hw ether ${2}; ifconfig ${1} up;
+}
+
+# get neighbour mac from SAI DB for given ip
+# $1 - ip of the neighbour
+# ret: 1 - not found
+#      0 - success
+function get_neighbour_mac()
+{
+    # convert ip to hex format (20.0.0.2 -> 14000002)
+    iface_ip_hex=`printf '%02X' ${iface_ip//./ }`
+    # grep redis DB to find a key holding data for the neighbour with this IP
+    key=`ssh ${dut_user}@${dut_host} "bash -c 'docker exec database redis-cli -n 1 KEYS ASIC* ' | grep -i ${iface_ip_hex}"`
+    #echo $key; echo
+    # NEIGHBOUR_DST_MAC_ADDRESS attribute code is 0, so using key 00000000
+    mac=`ssh ${dut_user}@${dut_host} "bash -c 'docker exec database redis-cli -n 1 HGET ${key} 00000000'"`
+    echo ${mac}
+}
+
+# save host's mac
+host_mac=$(get_mac ${iface})
+
+# populate neighbour #1
+set_mac ${iface} ${mac1}
+ping_dut
+
+# check neighbour #1
+neigh_mac=$(get_neighbour_mac ${iface_ip})
+if [ $neigh_mac != ${mac1//:/} ]; then
+    echo "Neighbour mac set failed"
+    exit 1
+fi
+
+# populate neighbour #2 (ip will remain the same)
+set_mac ${iface} ${mac2}
+ping_dut
+
+# chech neighbour's mac changed
+neigh_mac=$(get_neighbour_mac ${iface_ip})
+if [ $neigh_mac != ${mac2//:/} ]; then
+    echo "Neighbour mac update failed"
+    exit 1
+fi
+
+# restore host mac address
+set_mac ${iface} ${host_mac}
+
+exit 0

ansible/roles/test/tasks/neighbour.yml

@@ -0,0 +1,24 @@
+# Test run example:
+# ansible-playbook -i inventory --limit switch-host test_sonic.yml -b -e "ptf_host=ptf-1" --tags neighbour
+
+- name: Change DUT interface IP to test IP address
+  become: yes
+  command: /sbin/ifconfig Ethernet0 20.0.0.1 netmask 255.255.255.0
+
+- name: Change host interface IP to test IP address
+  become: yes
+  command: /sbin/ifconfig eth0 20.0.0.2 netmask 255.255.255.0
+  delegate_to: "{{ ptf_host }}"
+
+- name: copy neighbour test files
+  become: yes
+  copy: src=roles/test/files/neighbour/neigh_test.sh dest=/root mode=u=rx
+  delegate_to: "{{ ptf_host }}"
+
+- name: Check if switch handles neighbour MAC address change
+  become: true
+  shell: /root/neigh_test.sh admin {{ inventory_hostname }} 20.0.0.1 20.0.0.2
+  register: result
+  failed_when: result.rc != 0
+  delegate_to: "{{ ptf_host }}"
+

ansible/roles/test/tasks/sonic.yml

@@ -1,3 +1,7 @@
+- name: Neighbour tests
+  include: neighbour.yml
+  tags: neighbour
+
 - name: Test LLDP
   include: lldp.yml
   tags: lldp