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138 lines
5.5 KiB
138 lines
5.5 KiB
#
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# script for sending updates to cloudflare.com
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# 2014 Christian Schoenebeck <christian dot schoenebeck at gmail dot com>
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# many thanks to Paul for testing and feedback during development
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#
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# This script is parsed by dynamic_dns_functions.sh inside send_update() function
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#
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# using following options from /etc/config/ddns
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# option username - your cloudflare e-mail
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# option password - cloudflare api key, you can get it from cloudflare.com/my-account/
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# option domain - your full hostname to update, in cloudflare its subdomain.domain
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# i.e. myhost.example.com where myhost is the subdomain and example.com is your domain
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#
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# Attention !!! script will only work if there is only one subdomain-level at your domain
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# subdomain2.subdomain1.domain i.e. mail.host.example.com will not work
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#
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# variable __IP already defined with the ip-address to use for update
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#
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[ $use_https -eq 0 ] && write_log 14 "Cloudflare only support updates via Secure HTTP (HTTPS). Please correct configuration!"
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local __RECID __URL __KEY __KEYS __FOUND __DOMREC
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local __SUBDOM=$(echo $domain | awk -F "." '{print $1}')
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local __DOMAIN=$(echo $domain | awk -F "${__SUBDOM}." '{print $2}')
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local __TMP="/tmp/$$.json"
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# parse OpenWrt script with
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# functions for parsing and generating json
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. /usr/share/libubox/jshn.sh
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# function copied from /usr/share/libubox/jshn.sh
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# from BB14.09 for backward compatibility to AA12.09
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json_get_keys() {
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local __dest="$1"
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local _tbl_cur
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if [ -n "$2" ]; then
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json_get_var _tbl_cur "$2"
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else
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_json_get_var _tbl_cur JSON_CUR
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fi
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local __var="${JSON_PREFIX}KEYS_${_tbl_cur}"
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eval "export -- \"$__dest=\${$__var}\"; [ -n \"\${$__var+x}\" ]"
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}
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# function to "sed" unwanted string parts from DATFILE
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cleanup() {
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#based on the sample output on cloudflare.com homepage we need to do some cleanup
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sed -i 's/^[ \t]*//;s/[ \t]*$//' $DATFILE # remove invisible chars at beginning and end of lines
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sed -i '/^-$/d' $DATFILE # remove lines with "-" (dash)
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sed -i '/^$/d' $DATFILE # remove empty lines
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sed -i "#'##g" $DATFILE # remove "'" (single quote)
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}
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# build url according to cloudflare client api at https://www.cloudflare.com/docs/client-api.html
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# to "rec_load_all" to detect rec_id needed for update
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__URL="https://www.cloudflare.com/api_json.html" # https://www.cloudflare.com/api_json.html
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__URL="${__URL}?a=rec_load_all" # -d 'a=rec_load_all'
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__URL="${__URL}&tkn=$password" # -d 'tkn=8afbe6dea02407989af4dd4c97bb6e25'
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__URL="${__URL}&email=$username" # -d 'email=sample@example.com'
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__URL="${__URL}&z=$__DOMAIN" # -d 'z=example.com'
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# lets request the data
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do_transfer "$__URL" || return 1
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cleanup # cleanup dat file
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json_load "$(cat $DATFILE)" # lets extract data
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__FOUND=0 # found record indicator
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json_get_var __RES "result" # cloudflare result of last request
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json_get_var __MSG "msg" # cloudflare error message
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[ "$__RES" != "success" ] && {
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write_log 4 "'rec_load_all' failed with error: \n$__MSG"
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return 1
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}
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json_select "response"
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json_select "recs"
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json_select "objs"
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json_get_keys __KEYS
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for __KEY in $__KEYS; do
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local __ZONE __NAME __DISPLAY __TYPE
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json_select "$__KEY"
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json_get_var __ZONE "zone_name"
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json_get_var __NAME "name"
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json_get_var __DISPLAY "display_name"
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json_get_var __TYPE "type"
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# if "zone_name" == "name" == "display_name" == $domain, then we found a valid domain record
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if [ "$__NAME" = "$domain" ]; then
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[ "$__DISPLAY" = "$__ZONE" ] && __DOMREC=1 || __DOMREC=0
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# we must verify IPv4 and IPv6 because there might be both for the same host
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[ \( $use_ipv6 -eq 0 -a "$__TYPE" = "A" \) -o \( $use_ipv6 -eq 1 -a "$__TYPE" = "AAAA" \) ] && {
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__FOUND=1 # mark found
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break # found leave for loop
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}
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fi
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json_select ..
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done
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[ $__FOUND -eq 0 ] && {
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# we don't need to continue trying to update cloudflare because record to update does not exist
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# user has to setup record first outside ddns-scripts
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write_log 14 "No valid record found at Cloudflare setup. Please create first!"
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}
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json_get_var __RECID "rec_id" # last thing to do get rec_id
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json_cleanup # cleanup
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write_log 7 "rec_id '$__RECID' detected for host/domain '$domain'"
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# build url according to cloudflare client api at https://www.cloudflare.com/docs/client-api.html
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# for "rec_edit" to update IP address
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__URL="https://www.cloudflare.com/api_json.html" # https://www.cloudflare.com/api_json.html
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__URL="${__URL}?a=rec_edit" # -d 'a=rec_edit'
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__URL="${__URL}&tkn=$password" # -d 'tkn=8afbe6dea02407989af4dd4c97bb6e25'
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__URL="${__URL}&id=$__RECID" # -d 'id=9001'
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__URL="${__URL}&email=$username" # -d 'email=sample@example.com'
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[ $__DOMREC -eq 0 ] && __URL="${__URL}&z=$__DOMAIN" # -d 'z=example.com'
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[ $__DOMREC -eq 1 ] && __URL="${__URL}&z=$domain" # -d 'z=example.com'
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[ $use_ipv6 -eq 0 ] && __URL="${__URL}&type=A" # -d 'type=A' (IPv4)
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[ $use_ipv6 -eq 1 ] && __URL="${__URL}&type=AAAA" # -d 'type=AAAA' (IPv6)
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[ $__DOMREC -eq 0 ] && __URL="${__URL}&name=$__SUBDOM" # -d 'name=sub' (HOST/SUBDOMAIN)
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[ $__DOMREC -eq 1 ] && __URL="${__URL}&name=$domain" # -d 'name=example.com'(DOMAIN)
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__URL="${__URL}&content=$__IP" # -d 'content=1.2.3.4'
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__URL="${__URL}&service_mode=0" # -d 'service_mode=0'
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__URL="${__URL}&ttl=1" # -d 'ttl=1'
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# lets do the update
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do_transfer "$__URL" || return 1
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cleanup # cleanup tmp file
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json_load "$(cat $DATFILE)" # lets extract data
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json_get_var __RES "result" # cloudflare result of last request
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json_get_var __MSG "msg" # cloudflare error message
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[ "$__RES" != "success" ] && {
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write_log 4 "'rec_edit' failed with error:\n$__MSG"
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return 1
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}
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write_log 7 "Update of rec_id '$__RECID' successful"
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return 0
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