#!/bin/bash

# COPYRIGHT NOTICE STARTS HERE
#
# Copyright 2019 Intel Co., Ltd.
#
# 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.
#
# COPYRIGHT NOTICE ENDS HERE

# This script prepares the runtime environment
# for running vIPSec shell scripts on Ubuntu18.04

set -o nounset
set -o pipefail
set -o xtrace
set -o errexit

function setup_dependencies {
    apt-get update
    apt-get install -y curl gnupg2 pciutils make gcc libnuma-dev git linux-headers-`uname -r` module-init-tools libssl-dev
    echo "deb [trusted=yes] https://packagecloud.io/fdio/release/ubuntu bionic main" >> /etc/apt/sources.list.d/99fd.io.list
    curl -L https://packagecloud.io/fdio/master/gpgkey | apt-key add -
}

function install_vpp {
    apt-get update
    apt-get install -y vpp vpp-plugin-core vpp-plugin-dpdk
}

function install_dpdk {
    cd /opt
    git clone http://dpdk.org/git/dpdk
    cd /opt/dpdk
    export RTE_TARGET=x86_64-native-linux-gcc/ && export DESTDIR=/opt/dpdk && export RTE_SDK=/opt/dpdk &&  make install T=x86_64-native-linux-gcc
    modprobe uio
    insmod x86_64-native-linux-gcc/kmod/igb_uio.ko
}

function ipsec_settings {
# Create vpp configuration file
    cat > /opt/config/vpp.config << EOF
    unix {
            exec /opt/config/ipsec.conf
            nodaemon
            cli-listen /run/vpp/cli.sock
            log /tmp/vpp.log
         }

    cpu {
           main-core 0
           corelist-workers 1
        }

    dpdk {
            socket-mem 512
            log-level debug
            no-tx-checksum-offload
            dev default{
                    num-tx-desc 512
                    num-rx-desc 512
            }
            dev interfaceABus
            {
                    workers 0
            }
            dev interfaceBBus
            {
                    workers 0
            }
            vdev crypto_aesni_mb0

            no-multi-seg

            #enable_cryptodev

         }
EOF

# Check if sriov and qat are enabled, bind the pci devices with igb_uio driver
    if [ "$sriov_enabled" = true ]; then
        export interfaceABus=$(lspci -D -nn | grep -m1 '8086:154c' | cut -d ' ' -f 1)
        export interfaceBBus=$(lspci -D -nn | grep -m2 '8086:154c' | cut -d ' ' -f 1 | tail -n1)
    else
        export interfaceABus=$(ls -la /sys/class/net | grep 'eth1' | cut -d '/' -f 5)
        export interfaceBBus=$(ls -la /sys/class/net | grep 'eth3' | cut -d '/' -f 5)
    fi
    sed -i -e "s/interfaceABus/${interfaceABus}/g" -e "s/interfaceBBus/${interfaceBBus}/g" /opt/config/vpp.config
    python /opt/dpdk/usertools/dpdk-devbind.py -b igb_uio $interfaceABus $interfaceBBus
    export interfaceA=$(vppctl sh int | awk '$2 == "1"' | cut -d ' ' -f 1)
    export interfaceB=$(vppctl sh int | awk '$2 == "2"' | cut -d ' ' -f 1)

    if [ "$qat_enabled" = true ]; then
        export qatABus=$(lspci -D -nn | grep -m1 '8086:37c9' | cut -d ' ' -f 1)
        export qatBBus=$(lspci -D -nn | grep -m2 '8086:37c9' | cut -d ' ' -f 1 | tail -n1)
        python /opt/dpdk/usertools/dpdk-devbind.py -b igb_uio $qatABus $qatBBus
        sed -i "/#enable_cryptodev/a\n              dev $qatABus\n              dev $qatBBus\n" /opt/config/vpp.config
        sed -i "/vdev crypto_aesni_mb0/d" /opt/config/vpp.config
    fi

# Create ipsec configuration file
    cat > /opt/config/ipsec.conf << EOF
    set interface state VirtualFunctionEthernet0/5/0 up
    set interface state VirtualFunctionEthernet0/6/0 up

    set interface ip address VirtualFunctionEthernet0/5/0 input_interface_ip/24
    set interface ip address VirtualFunctionEthernet0/6/0 output_interface_ip/24

    set int promiscuous on VirtualFunctionEthernet0/5/0
    set int promiscuous on VirtualFunctionEthernet0/6/0

    set ip arp VirtualFunctionEthernet0/6/0 remote_tunnel_ip fa:16:3e:a6:e4:c7
    set ip arp VirtualFunctionEthernet0/5/0 routing_ip fa:16:3e:f1:65:dc

    ip route add count 1 packet_dst/32 via route_interface VirtualFunctionEthernet0/6/0

    ipsec spd add 1
    set interface ipsec spd VirtualFunctionEthernet0/6/0 1
    ipsec sa add 1 spi 1921681004 esp tunnel-src local_tunnel_ip tunnel-dst remote_tunnel_ip crypto-key 2b7e151628aed2a6abf7158809cf4f3d crypto-alg aes-cbc-128 integ-key 6867666568676665686766656867666568676669 integ-alg sha1-96
    ipsec policy add spd 1 traffic_direction priority 100 action protect sa 1 local-ip-range packet_src-packet_src remote-ip-range packet_dst-packet_dst
    ipsec policy add spd 1 traffic_direction priority 90 protocol 50 action bypass local-ip-range packet_src-255.255.255.255 remote-ip-range remote_tunnel_ip-remote_tunnel_ip
EOF

# Replace the actual ip and interfaces into the ipsec configuration
    sed -i -e "s/input_interface_ip/${input_interface_ip}/g" -e "s/output_interface_ip/${output_interface_ip}/g" -e "s/routing_ip/${vsn_private_ip_0}/g" -e "s#VirtualFunctionEthernet0/5/0#${interfaceA}#g" -e "s#VirtualFunctionEthernet0/6/0#${interfaceB}#g" -e "s/local_tunnel_ip/${local_tunnel_ip}/g" -e "s/remote_tunnel_ip/${remote_tunnel_ip}/g" -e "s/route_interface/${route_interface}/g" -e "s/packet_src/${packet_src}/g" -e "s/packet_dst/${packet_dst}/g" -e "s/traffic_direction/${traffic_direction}/g" /opt/config/ipsec.conf
    vpp -c /opt/config/vpp.config
}


mkdir /opt/config
echo "$demo_artifacts_version"                >  /opt/config/demo_artifacts_version.txt
echo "$dcae_collector_ip"                     >  /opt/config/dcae_collector_ip.txt
echo "$dcae_collector_port"                   >  /opt/config/dcae_collector_port.txt
echo "$ipsec_private_net_gw"                  >  /opt/config/ipsec_private_net_gw_ip.txt
echo "$ipsec_private_net_cidr"                >  /opt/config/ipsec_private_net_cidr.txt
echo "$ipsec_private_network_name"            >  /opt/config/ipsec_private_network_name.txt
echo "$packet_src"                            >  /opt/config/packet_source_ip.txt
echo "$packet_dst"                            >  /opt/config/packet_destination_ip.txt
echo "$remote_tunnel_ip"                      >  /opt/config/remote_tunnel.txt
echo "$route_interface"                       >  /opt/config/route_interface.txt
echo "$traffic_direction"                     >  /opt/config/traffic_direction.txt
echo "$vipsecB_private_ip_0"                  >  /opt/config/vipsecB_private_ip0.txt
echo "$vipsecB_private_ip_2"                  >  /opt/config/vipsecB_private_ip2.txt
echo "$protected_clientB_network_name"        >  /opt/config/protected_clientB_network_name.txt
echo "$protected_clientB_net_gw"              >  /opt/config/protected_clientB_net_gw.txt
echo "$protected_clientB_net_cidr"            >  /opt/config/protected_clientB_net_cidr.txt

echo 'vm.nr_hugepages = 1024' >> /etc/sysctl.conf
sysctl -p

setup_dependencies
install_vpp
install_dpdk
ipsec_settings