#!/bin/bash

. /usr/lib/whonix/utility_functions

# Search though files and updates IP address to the current 
# IP address(es)

FILES=(
    '/usr/lib/leaktest-workstation/simple_ping.py'
    '/usr/lib/whonixcheck/preparation'
    '/usr/share/anon-kde-streamiso/share/config/kioslaverc'
    '/usr/bin/whonix_firewall'
    '/etc/whonix_firewall.d/30_default'
    '/usr/lib/anon-shared-helper-scripts/tor_bootstrap_check.bsh'
    '/usr/bin/uwt'
    '/etc/uwt.d/30_uwt_default'
    '/usr/share/tor/tor-service-defaults-torrc.anondist'
    '/usr/bin/update-torbrowser'
    '/etc/network/interfaces.whonix'
    '/etc/resolv.conf.anondist'
    '/etc/sdwdate.d/31_anon_dist_stream_isolation_plugin'
    '/etc/rinetd.conf.anondist'
    '/etc/network/interfaces.whonix'
    '/usr/share/anon-torchat/.torchat/torchat.ini'
)

# sed search and replace. return 0 if replace happened, otherwise 1
search_replace() {
    local search="${1}"
    local replace="${2}"
    local file="${3}"
    local retval=1

    if ! [ -L "${file}" ]; then 
        ls_attrs="$(lsattr "${file}")"
        ls_attrs=${ls_attrs:4:1}
        if [ "${ls_attrs}" == "i" ]; then
            chattr -i "${file}"
        fi
    fi
    
    sed -i.bak '/'"${search}"'/,${s//'"${replace}"'/;b};$q1' "${file}"
    retval=$?

    if [ "${ls_attrs}" = "i" ]; then
        chattr +i "${file}"
    fi

    return $retval
}

function replace_ips()
{
    local search_ip="${1}"
    local replace_ip="${2}"
    local files=("${!3}")
    local retval=1

    # If IP is 10.152.152.10, network is 10.152.152.0
    search_network="${search_ip%[.]*}.0"
    replace_network="${replace_ip%[.]*}.0"

    if ! [ "${search_ip}" = "${replace_ip}" ]; then
        for file in "${files[@]}"; do
            if [ -f "$file" ]; then
                search_replace "${search_ip}" "${replace_ip}" "${file}" && retval=0
                search_replace "${search_network}" "${replace_network}" "${file}" && retval=0
            fi
        done
    fi

    return $retval
}

update_ip() {
    ip=${1}

    echo "${ip}" > /etc/whonix-netvm-gateway
    grep '^DisableNetwork 0$' /etc/tor/torrc && {
	service tor status && {
            service tor reload || true;
	}
    }
}

if [ "${WHONIX}" == "gateway" ]; then
    ip="$(xenstore-read qubes-netvm-gateway)"
    if [ x${ip} != x ]; then
        # Compare to current IP address assiged by Qubes
        replace_ips "$(cat /etc/whonix-netvm-gateway)" "${ip}" FILES[@] && update_ip "${ip}"

        # Do again; checking for original 10.152.152.10 incase of update
        replace_ips "10.152.152.10" "${ip}" FILES[@] && update_ip "${ip}"

        # Do again; checking for original 10.152.152.11 incase of update
        replace_ips "10.152.152.11" "${ip}" FILES[@] && update_ip "${ip}"
    fi

elif [ "${WHONIX}" == "workstation" ]; then
    ip="$(xenstore-read qubes-ip)"
    gateway="$(xenstore-read qubes-gateway)"

    if [ x${ip} != x ]; then
        # Compare to current IP address assiged by Qubes
        replace_ips "$(cat /etc/whonix-ip)" "${ip}" FILES[@] && echo "${ip}" > /etc/whonix-ip

        # Do again; checking for original 10.152.152.11 incase of update
        replace_ips "10.152.152.11" "${ip}" FILES[@] &&  echo "${ip}" > /etc/whonix-ip
    fi

    if [ x${gateway} != x ]; then
        # Compare to current gateway IP address assiged by Qubes
        replace_ips "$(cat /etc/whonix-netvm-gateway)" "${gateway}" FILES[@] && echo "${gateway}" > /etc/whonix-netvm-gateway

        # Do again; checking for original 10.152.152.10 incase of update
        replace_ips "10.152.152.10" "${gateway}" FILES[@] && echo "${gateway}" > /etc/whonix-netvm-gateway
    fi
fi