snap-dyndns-server/update.sh

#!/bin/bash
########################################################################
#  Copyright (C) 2016 Max Mehl <mail [at] mehl [dot] mx>
########################################################################
#  
#  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/>.
#  
########################################################################
#  
#  This file uses the data forwarded by update.php, validates the given 
#  login data in the user database, and does the API call to the INWX 
#  API. 
#  
########################################################################


cd "$(dirname "$(readlink -f "$0")")"

# Test if config.cfg exists and set needed variables
if [ ! -e config.cfg ]; then echo "Missing config.cfg file. Edit and rename config.cfg.sample"; exit 1; fi
source config.cfg

# Test whether necessary applications are installed
function testinst {
  APP=$1
  if [ $(which $APP | wc -l) != 1 ]; then
    echo "$APP does not seem to be installed. Aborting."
    exit 1
  fi
}
testinst curl

USERDB=users.db

DOMAIN="$1"
NEWIP="$2"
U_USER="$3"
U_PASS="$4"

E=$(grep "^$DOMAIN;" $USERDB)

if [ "$E" != "" ]; then
  DNSID=$(echo $E | cut -d";" -f2)
  E_USER=$(echo $E | cut -d";" -f3)
  E_PASS=$(echo $E | cut -d";" -f4)
  
  # Check if user as given correct user and password
  if [ "$U_USER" == "$E_USER" ] && [ "$U_PASS" == "$E_PASS" ]; then
    DATA=$(cat update.api | sed "s/%PASSWD%/$PASSWORD/g;s/%USER%/$USERNAME/g;s/%DNSID%/$DNSID/g;s/%NEWIP%/$NEWIP/g")
    curl -X POST -d "$DATA" "$APIHOST" --header "Content-Type:text/xml" --insecure > update.log
    echo "" >> update.log
    echo "Updated IP address for $DNSID ($DOMAIN) to $NEWIP." >> update.log
    echo "Success: Updated $DOMAIN to $NEWIP."
  else
    echo "Wrong user or password."
  fi
else
  echo "Domain does not exist in database"
fi