#!/bin/bash
# Copyright 2015-2017 AT&T Intellectual Property, Inc
#  
# 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.
#

# What this is: An OpenStack Congress policy test. Sets up and validates policy
# creation and execution for:
# 1) Identifying VMs that have STMP (TCP port 25) open for ingress.
#
# Status: this is a work in progress, under test. 
#
# Prerequisite: 
# - OpenStack deployment with Congress service activated.
# - OpenStack CLI environment variables setup e.g. via admin-openrc.sh script.
#
# How to use:
#   $ bash smtp_ingress.sh
# 
# After test, cleanup
#   $ bash smtp_ingress-clean.sh

pass() {
  echo "Hooray!"
  set +x #echo off
  exit 0
}

# Use this to trigger fail() at the right places
# if [ "$RESULT" == "Test Failed!" ]; then fail; fi
fail() {
  echo "Test Failed!"
  set +x #echo off
  exit 1
}

unclean() {
  echo "Unclean environment!"
  fail
}

if [  $# -eq 1 ]; then
  if [ $1 == "debug" ]; then 
    set -x #echo on
  fi
fi

# Find external network if any, and details
function get_external_net () {
  echo "get_external_net()"
  network_ids=($(neutron net-list|grep -v "+"|grep -v name|awk '{print $2}'))
  for id in ${network_ids[@]}; do
      [[ $(neutron net-show ${id}|grep 'router:external'|grep -i "true") != "" ]] && ext_net_id=${id}
  done
  if [[ $ext_net_id ]]; then 
    EXTERNAL_NETWORK_NAME=$(neutron net-show $ext_net_id | awk "/ name / { print \$4 }")
    EXTERNAL_SUBNET_ID=$(neutron net-show $EXTERNAL_NETWORK_NAME | awk "/ subnets / { print \$4 }")
  else
    echo "External network not found"
    echo "Create external network"
    neutron net-create public --router:external
    EXTERNAL_NETWORK_NAME="public"
    echo "Create external subnet"
    neutron subnet-create public 192.168.10.0/24 --name public --enable_dhcp=False --allocation_pool start=192.168.10.6,end=192.168.10.49 --gateway 192.168.10.1
    EXTERNAL_SUBNET_ID=$(openstack subnet show public | awk "/ id / { print \$4 }")
  fi
}

echo "Create Congress policy 'test'"
if [[ $(openstack congress policy show test | awk "/ id / { print \$4 }") ]]; then unclean; fi
openstack congress policy create test

echo "Create smtp_ingress rule in policy 'test'"
openstack congress policy rule create test "smtp_ingress(x) :- nova:servers(id=x,status='ACTIVE'), neutronv2:ports(port_id, status='ACTIVE'), neutronv2:security_groups(sg, tenant_id, sgn, sgd), neutronv2:security_group_port_bindings(port_id, sg), neutronv2:security_group_rules(sg, rule_id, tenant_id, remote_group_id, 'ingress', ethertype, 'tcp', port_range_min, port_range_max, remote_ip), lt(port_range_min, 26), gt(port_range_max, 24)" --name smtp_ingress

echo "Create image cirros1"
image=$(openstack image list | awk "/ cirros-0.3.3-x86_64 / { print \$2 }")
if [ "$image" == "" ]; then glance --os-image-api-version 1 image-create --name cirros-0.3.3-x86_64 --disk-format qcow2 --location http://download.cirros-cloud.net/0.3.3/cirros-0.3.3-x86_64-disk.img --container-format bare
fi

get_external_net

echo "Create floating IP for external subnet"
FLOATING_IP_ID=$(neutron floatingip-create $EXTERNAL_NETWORK_NAME | awk "/ id / { print \$4 }")
FLOATING_IP=$(neutron floatingip-show $FLOATING_IP_ID | awk "/ floating_ip_address / { print \$4 }" | cut -d - -f 1)
# Save ID to pass to cleanup script
echo "FLOATING_IP_ID=$FLOATING_IP_ID" >/tmp/TEST_VARS.sh

echo "Create internal network"
if [[ $(neutron net-list | awk "/ test_internal / { print \$2 }") ]]; then unclean; fi
neutron net-create test_internal

echo "Create internal subnet"
neutron subnet-create test_internal 10.0.0.0/24 --name test_internal --gateway 10.0.0.1 --enable-dhcp --allocation-pool start=10.0.0.2,end=10.0.0.254 --dns-nameserver 8.8.8.8

echo "Create router"
if [[ $(neutron router-list | awk "/ test_router / { print \$2 }") ]]; then unclean; fi
neutron router-create test_router

echo "Create router gateway"
neutron router-gateway-set test_router $EXTERNAL_NETWORK_NAME

echo "Add router internal for internal network"
neutron router-interface-add test_router subnet=test_internal

COUNTER=1
RESULT="Failed!"
until [[ "$COUNTER" -gt 6  || "$RESULT" == "Success!" ]]; do
  echo "Get the internal network ID: try" $COUNTER 
  test_internal_NET=$(neutron net-list | awk "/ test_internal / { print \$2 }")
  if [ "$test_internal_NET" != "" ]; then RESULT="Success!"; fi
  let COUNTER+=1
  sleep 10
done
if [ "$RESULT" == "Test Failed!" ]; then fail; fi

echo "Create a security group 'smtp_ingress'"
if [[ $(neutron security-group-list | awk "/ smtp_ingress / { print \$2 }") ]]; then unclean; fi
neutron security-group-create smtp_ingress

echo "Create security group ingress rule for 'smtp_ingress'"
neutron security-group-rule-create --direction ingress --protocol=TCP --port-range-min=25 --port-range-max=25 smtp_ingress

echo "Boot cirros1 with smtp_ingress security group"
nova boot --flavor m1.tiny --image cirros-0.3.3-x86_64 --nic net-id=$test_internal_NET --security-groups smtp_ingress cirros1

echo "Get cirros1 instance ID"
test_cirros1_ID=$(openstack server list | awk "/ cirros1 / { print \$2 }")

echo "Wait for cirros1 to go ACTIVE"
COUNTER=5
RESULT="Test Failed!"
until [[ $COUNTER -eq 0  || $RESULT == "Test Success!" ]]; do
  status=$(openstack server show $test_cirros1_ID | awk "/ status / { print \$4 }")
  if [[ "$status" == "ACTIVE" ]]; then RESULT="Test Success!"; fi
  let COUNTER-=1
  sleep 5
done
if [ "$RESULT" == "Test Failed!" ]; then fail; fi

echo "Associate floating IP to cirros1"
nova floating-ip-associate cirros1 $FLOATING_IP

echo "Verify cirros1 is in the Congress policy 'test' table 'smtp_ingress'"
COUNTER=5
RESULT="Test Failed!"
until [[ $COUNTER -eq 0  || $RESULT == "Test Success!" ]]; do
  openstack congress policy row list test smtp_ingress 
  cirros1_ID=$(openstack congress policy row list test smtp_ingress | awk "/ $test_cirros1_ID / { print \$2 }")
  if [ "$cirros1_ID" == "$test_cirros1_ID" ]; then RESULT="Test Success!"
  fi
  let COUNTER-=1
  sleep 10
done
echo $RESULT
if [ "$RESULT" == "Test Failed!" ]; then fail; fi

pass