#!/bin/bash

# Search though files and updates IP address to the current 
# 'qubes-netvm-gateway' IP address

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 restart_tor=0

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

    if ! [ "${search_ip}" == "${replace_ip}" ]; then
        for file in "${files[@]}"; do
            if [ -f "$file" ]; then
                search_replace "${search_ip}" "${replace_ip}" "${file}" && restart_tor=1
                search_replace "${search_network}" "${replace_network}" "${file}" && restart_tor=1
            fi
        done

        if [ "${restart_tor}" == "1" ]; then
            echo "${replace_ip}" > /etc/whonix-netvm-gateway
    	    service tor restart
        fi
    fi
}

ip="$(xenstore-read qubes-netvm-gateway)"

# Compare to current IP address assiged by Qubes
replace_ips "$(cat /etc/whonix-netvm-gateway)" "${ip}" FILES[@]

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

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