freedombone/src/freedombone-ddns

#!/bin/bash
#  _____               _           _
# |   __|___ ___ ___ _| |___ _____| |_ ___ ___ ___
# |   __|  _| -_| -_| . | . |     | . | . |   | -_|
# |__|  |_| |___|___|___|___|_|_|_|___|___|_|_|___|
#
#                              Freedom in the Cloud
#
# Change dynamic dns settings
#
# License
# =======
#
# Copyright (C) 2018 Bob Mottram <bob@freedombone.net>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

PROJECT_NAME='freedombone'

export TEXTDOMAIN=${PROJECT_NAME}-ddns
export TEXTDOMAINDIR="/usr/share/locale"

source "/usr/share/${PROJECT_NAME}/utils/${PROJECT_NAME}-utils-config"

DDNS_PROVIDER="none"
DDNS_USERNAME=
DDNS_PASSWORD=

function update_inadyn_config {
    if [ ! -f /etc/inadyn.conf ]; then
        return
    fi

    if [[ "$DDNS_PROVIDER" == *'freedns'* ]]; then
        return
    fi

    if ! grep -q "$DDNS_PROVIDER" /etc/inadyn.conf; then
        # remove entry for any previous ddns
        sed -i '/system /,$d' /etc/inadyn.conf

        # add the new provider
        { echo '';
          echo "system $DDNS_PROVIDER";
          echo '  ssl';
          echo "  checkip-url $GET_IP_ADDRESS_URL /"; } >> /etc/inadyn.conf
        if [ "$DDNS_USERNAME" ]; then
            echo "  username $DDNS_USERNAME" >> /etc/inadyn.conf
        fi
        if [ "$DDNS_PASSWORD" ]; then
            echo "  password $DDNS_PASSWORD" >> /etc/inadyn.conf
        fi
    else
        # change username/password for an existing provider
        if [ "$DDNS_USERNAME" ]; then
            sed -i "s|  username .*|  username $DDNS_USERNAME|g" /etc/inadyn.conf
        fi
        if [ "$DDNS_PASSWORD" ]; then
            sed -i "s|  password .*|  password $DDNS_PASSWORD|g" /etc/inadyn.conf
        fi
    fi

    systemctl enable inadyn
    systemctl restart inadyn
}

function dynamic_dns_setup {
    DDNS_PROVIDER='none'

    W=(1 freedns.afraid.org
       2 dyn.com
       3 zoneedit.com
       4 no-ip.com
       5 easydns.com
       6 dnsomatic.com
       7 dns.he.net
       8 tunnelbroker.net
       9 sitelutions.com
       10 dnsexit.com
       11 changeip.com
       12 zerigo.com
       13 dhis.org
       14 nsupdate.info
       15 loopia.com
       16 namecheap.com
       17 ovh.com
       18 dtdns.com
       19 giradns.com
       20 duiadns.net
       21 ddnss.de
       22 dynv6.com
       23 ipv4.dynv6.com
       24 spdyn.de
       25 freemyip.com
       26 cloudxns.net)

    # shellcheck disable=SC2068
    selection=$(dialog --backtitle $"Freedombone Configuration" --title $"Dynamic DNS" --menu $"Choose Dynamic DNS provider, or ESC for none:" 24 60 32 "${W[@]}" 3>&2 2>&1 1>&3)

    if [ ! "$selection" ]; then
        if [ -f /etc/systemd/system/inadyn.service ]; then
            systemctl stop inadyn
            systemctl disable inadyn
        fi
        return
    fi

    case $selection in
        1) DDNS_PROVIDER="default@freedns.afraid.org";;
        2) DDNS_PROVIDER="default@www.dyn.com";;
        3) DDNS_PROVIDER="default@www.zoneedit.com";;
        4) DDNS_PROVIDER="default@www.no-ip.com";;
        5) DDNS_PROVIDER="default@www.easydns.com";;
        6) DDNS_PROVIDER="default@www.dnsomatic.com";;
        7) DDNS_PROVIDER="default@dns.he.net";;
        8) DDNS_PROVIDER="default@www.tunnelbroker.net";;
        9) DDNS_PROVIDER="default@www.sitelutions.com";;
        10) DDNS_PROVIDER="default@www.dnsexit.com";;
        11) DDNS_PROVIDER="default@www.changeip.com";;
        12) DDNS_PROVIDER="default@www.zerigo.com";;
        13) DDNS_PROVIDER="default@www.dhis.org";;
        14) DDNS_PROVIDER="default@nsupdate.info";;
        15) DDNS_PROVIDER="default@www.loopia.com";;
        16) DDNS_PROVIDER="default@www.namecheap.com";;
        17) DDNS_PROVIDER="default@www.ovh.com";;
        18) DDNS_PROVIDER="default@www.dtdns.com";;
        19) DDNS_PROVIDER="default@giradns.com";;
        20) DDNS_PROVIDER="default@www.duiadns.net";;
        21) DDNS_PROVIDER="default@ddnss.de";;
        22) DDNS_PROVIDER="default@dynv6.com";;
        23) DDNS_PROVIDER="default@ipv4.dynv6.com";;
        24) DDNS_PROVIDER="default@spdyn.de";;
        25) DDNS_PROVIDER="default@freemyip.com";;
        26) DDNS_PROVIDER="default@www.cloudxns.net";;
    esac
    save_configuration_values

    valid_ddns_username=
    valid_ddns_password=
    if [[ "$DDNS_PROVIDER" == "none" ]]; then
        if [ -f /etc/systemd/system/inadyn.service ]; then
            systemctl stop inadyn
            systemctl disable inadyn
        fi
    else
        while [ ! $valid_ddns_username ]
        do
            data=$(mktemp 2>/dev/null)
            dialog --backtitle $"Freedombone Configuration" \
                   --inputbox $"Dynamic DNS provider username" 10 30 "$(grep 'DDNS_USERNAME' temp.cfg | awk -F '=' '{print $2}')" 2> "$data"
            sel=$?
            case $sel in
                0)  possible_username=$(cat "$data")
                    if [ "$possible_username" ]; then
                        if [ ${#possible_username} -gt 1 ]; then
                            valid_ddns_username=$(cat "$data")
                            # shellcheck disable=SC2034
                            DDNS_USERNAME="$valid_ddns_username"
                            rm -f "$data"
                            break;
                        fi
                    fi
                    ;;
                1) rm -f "$data"
                   clear
                   exit 1;;
                255) rm -f "$data"
                     clear
                     exit 1;;
            esac
            rm -f "$data"
        done
        save_configuration_values

        while [ ! $valid_ddns_password ]
        do
            data=$(mktemp 2>/dev/null)
            dialog --backtitle $"Freedombone Configuration" \
                   --clear \
                   --insecure \
                   --passwordbox $"Dynamic DNS provider password" 10 30 "$(grep 'DDNS_PASSWORD' temp.cfg | awk -F '=' '{print $2}')" 2> "$data"
            sel=$?
            case $sel in
                0)  possible_password=$(cat "$data")
                    if [ "$possible_password" ]; then
                        if [ ${#possible_password} -gt 1 ]; then
                            valid_ddns_password=$(cat "$data")
                            DDNS_PASSWORD=$valid_ddns_password
                            break;
                        fi
                    fi
                    ;;
                1) rm -f "$data"
                   clear
                   exit 1;;
                255) rm -f "$data"
                     clear
                     exit 1;;
            esac
            rm -f "$data"
            if [ ${#DDNS_PASSWORD} -lt "$MINIMUM_PASSWORD_LENGTH" ]; then
                dialog --title $"Password quality check" --msgbox $"The password given was too short. It must be at least $MINIMUM_PASSWORD_LENGTH characters. You may need to change your password on the dynamic DNS provider's web site." 10 40
                DDNS_PASSWORD=""
            fi
        done
        save_configuration_values
        update_inadyn_config
    fi
}

function choose_dynamic_dns {
    if [[ "$SYSTEM_TYPE" != "mesh"* && "$ONION_ONLY" == "no" ]]; then
        dialog --title $"Dynamic DNS" \
               --backtitle $"Freedombone Configuration" \
               --yesno $"\\nConfigure a dynamic DNS service?\\n\\nIf it is already handled by your internet router then select 'no'." 10 50
        sel=$?
        case $sel in
            0) dynamic_dns_setup
               ;;
            255) clear
                 exit 1
                 ;;
        esac
    fi
}

if [ ! "$CONFIGURATION_FILE" ]; then
    CONFIGURATION_FILE=$HOME/${PROJECT_NAME}.cfg
fi

read_configuration_values

if [[ "$ONION_ONLY" != 'no' ]]; then
    exit 0
fi

choose_dynamic_dns
clear

exit 0