net/ddns-scripts/samples/update_sample.sh

   1 # sample script for sending user defined updates
   2 # 2014-2015 Christian Schoenebeck <christian dot schoenebeck at gmail dot com>
   3 #
   4 # activated inside /etc/config/ddns by setting
   5 #
   6 # option update_script '/usr/lib/ddns/update_sample.sh'
   7 #
   8 # the script is parsed (not executed) inside send_update() function
   9 # of /usr/lib/ddns/dynamic_dns_functions.sh
  10 # so you can use all available functions and global variables inside this script
  11 # already defined in dynamic_dns_updater.sh and dynamic_dns_functions.sh
  12 #
  13 # It make sence to define the update url ONLY inside this script
  14 # because it's anyway unique to the update script
  15 # otherwise it should work with the default scripts
  16 #
  17 # the code here is the copy of the default used inside send_update()
  18 #
  19 # tested with spdns.de
  20 local __URL="http://[USERNAME]:[PASSWORD]@update.spdns.de/nic/update?hostname=[DOMAIN]&myip=[IP]"
  21 # inside url we need domain, username and password
  22 [ -z "$domain" ]   && write_log 14 "Service section not configured correctly! Missing 'domain'"
  23 [ -z "$username" ] && write_log 14 "Service section not configured correctly! Missing 'username'"
  24 [ -z "$password" ] && write_log 14 "Service section not configured correctly! Missing 'password'"
  25
  26 # do replaces in URL
  27 __URL=$(echo $__URL | sed -e "s#\[USERNAME\]#$URL_USER#g" -e "s#\[PASSWORD\]#$URL_PASS#g" \
  28                              -e "s#\[PARAMENC\]#$URL_PENC#g" -e "s#\[PARAMOPT\]#$param_opt#g" \
  29                              -e "s#\[DOMAIN\]#$domain#g"     -e "s#\[IP\]#$__IP#g")
  30 [ $use_https -ne 0 ] && __URL=$(echo $__URL | sed -e 's#^http:#https:#')
  31
  32 do_transfer "$__URL" || return 1
  33
  34 write_log 7 "DDNS Provider answered:\n$(cat $DATFILE)"
  35
  36 # analyse provider answers
  37 # "good [IP_ADR]"       = successful
  38 # "nochg [IP_ADR]"      = no change but OK
  39 grep -i -E "good|nochg" $DATFILE >/dev/null 2>&1
  40 return $?       # "0" if "good" or "nochg" found
  41