#! /bin/bash

# Copyright (C) 2015 GRNET S.A.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.

### BEGIN TASK INFO
# Provides:             ConfigureNetwork
# RunBefore:            EnforcePersonality
# RunAfter:             InstallUnattend
# Short-Description:    Configure the VM's network interfaces
### END TASK INFO

set -e
. "@commondir@/common.sh"


trap task_cleanup EXIT
report_task_start

# Check if the task should be prevented from running.
check_if_excluded

if [ ! -d "$SNF_IMAGE_TARGET" ]; then
    log_error "Target dir: \`$SNF_IMAGE_TARGET' is missing"
fi

distro=$(get_base_distro "$SNF_IMAGE_TARGET")

if [ ! -f "@networkingdir@/$distro.sh" ]; then
    warn "Don't know how to configure the network for this OS"
    exit 0
fi

export SNF_IMAGE_TARGET

# Initialize the driver
"@networkingdir@/$distro.sh" -i

for index in $(seq 0 $((NIC_COUNT-1))); do
    dhcp=no
    dhcp6=no
    ipv4=no
    ipv6=no

    eval export TYPE=\"\$NIC_${index}_FRONTEND_TYPE\"
    eval export IP=\"\$NIC_${index}_IP\"
    eval export LINK=\"\$NIC_${index}_LINK\"
    eval export MAC=\"\$NIC_${index}_MAC\"
    eval export MODE=\"\$NIC_${index}_MODE\"
    eval export NAME=\"\$NIC_${index}_NAME\"
    eval export GATEWAY=\"\$NIC_${index}_NETWORK_GATEWAY\"
    eval export GATEWAY6=\"\$NIC_${index}_NETWORK_GATEWAY6\"
    eval export NETWORK_NAME=\"\$NIC_${index}_NETWORK_NAME\"
    eval export SUBNET=\"\$NIC_${index}_NETWORK_SUBNET\"
    eval export SUBNET6=\"\$NIC_${index}_NETWORK_SUBNET6\"
    eval export TAGS=\"\$NIC_${index}_NETWORK_TAGS\"

   # Relative to the card type index
    : $((${TYPE}_index++))
    export ${TYPE}_index


    for tag in ${TAGS}; do
        for dhcp_tag in $SNF_IMAGE_DHCP_TAGS; do
            if [ "$tag" = "$dhcp_tag" ]; then
                dhcp=yes
            fi
        done
        for dhcp_tag in $SNF_IMAGE_STATEFUL_DHCPV6_TAGS; do
            if [ "$tag" = "$dhcp_tag" ]; then
                dhcp6=stateful
            fi
        done
        for dhcp_tag in $SNF_IMAGE_STATELESS_DHCPV6_TAGS; do
            if [ "$tag" = "$dhcp_tag" ]; then
                dhcp6=stateless
            fi
        done
    done

    if [ -n "${IP}" ]; then
        ipv4=yes
    fi

    if [ -n "${GATEWAY6}" ]; then
        ipv6=yes
    fi

    ARGS="-n $index"

    if [ "$ipv4" = yes ]; then
        if [ "$dhcp" = yes ]; then
            ARGS+=" -4 dhcp"
        else
            ARGS+=" -4 static"
        fi
    fi

    if [ "$ipv6" = yes ]; then
        if [ "$dhcp6" = stateful ]; then
            ARGS+=" -6 dhcp"
        elif [ "$dhcp6" = stateless ]; then
            ARGS+=" -6 slaac_dhcp"
        else
            ARGS+=" -6 slaac"
        fi
    fi

    "@networkingdir@/$distro.sh" $ARGS

done

# Finalize the driver
"@networkingdir@/$distro.sh" -f


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