ddns.sh

_DEBUG_=false;_LOG_=true;_ERR_=true;AccessKeyId=${MY_ALIYUN_KEY};AccessKeySec=${MY_ALIYUN_SECRET};DomainRR=${1:-${DomainRR}};DomainName=${DOMAIN};DomainType=${DOMAIN_TYPE:-A};DomainRecordId="";ALiServerAddr="alidns.aliyuncs.com";MyIPEchoUrl="http://whatismyip.akamai.com/";if [ "${DomainType}" == "AAAA" ];then MyIPEchoUrl="http://ipv6.whatismyip.akamai.com/";fi;g_pn=0;_func_ret="";_debug(){ ${_DEBUG_}&&echo $(date "+%F %T")"DEBUG $*";};_log(){ ${_LOG_}&&echo $(date "+%F %T")"INFO $*";};_err(){ ${_ERR_}&&echo $(date "+%F %T")"ERROR $*">&2;};reset_func_ret(){ _func_ret="";};put_param(){ eval g_pkey_${g_pn}=$1;eval g_pval_$1=$2;g_pn=$((g_pn + 1));};reset_param(){ g_pn=0;};put_params_public(){ put_param "Format" "JSON";put_param "Version" "2015-01-09";put_param "AccessKeyId" "${AccessKeyId}";put_param "SignatureMethod" "HMAC-SHA1";put_param "SignatureVersion" "1.0";rand_num=$(openssl rand -hex 16);local time_utc=$(date -u +"%Y-%m-%dT%H:%M:%SZ");_debug time_stamp: ${time_utc};put_param "Timestamp" "${time_utc}";_debug rand_num: ${rand_num};put_param "SignatureNonce" "${rand_num}";};put_params_UpdateDomainRecord(){ put_param "Action" "UpdateDomainRecord";put_param "RR" "${DomainRR}";put_param "RecordId" "${DomainRecordId}";put_param "Type" "${DomainType}";put_param "Value" "${1}";};put_params_DescribeDomainRecordInfo(){ put_param "Action" "DescribeDomainRecords";put_param "DomainName" "${DomainName}";put_param "RRKeyWord" "${DomainRR}";put_param "Type" "${DomainType}";};pack_params(){ reset_func_ret;local ret="";local key key_enc val val_enc;local i=0;while [ $i -lt ${g_pn} ];do eval key="\$g_pkey_${i}";eval val="\$g_pval_${key}";rawurl_encode "${key}";key_enc=${_func_ret};rawurl_encode "${val}";val_enc=${_func_ret};ret="${ret}${key_enc}=${val_enc}&";i=$((++i));done;_func_ret=${ret%"&"};};get_my_ip(){ reset_func_ret;local my_ip=$(curl ${MyIPEchoUrl} --silent --connect-timeout 10);_func_ret=${my_ip};};get_domain_ip(){ put_params_public;put_params_DescribeDomainRecordInfo;send_request;local result=${_func_ret};reset_param;reset_func_ret;_func_ret=$(echo ${result}|grep -Eo '"Value":"[0-9a-f:.]+"'|grep -Eo '[0-9a-f:.]{5,}');DomainRecordId=$(echo ${result}|grep -Eo '"RecordId":"[0-9]+"'|grep -Eo '[0-9]{5,}');if [ -z ${DomainRecordId} ];then _err get domain ip failed ${result};exit 1;fi;_debug DomainRecordId: ${DomainRecordId};};rawurl_encode(){ reset_func_ret;local string="${1}";local strlen=${#string};local encoded="";local pos c o;pos=0;while [ ${pos} -lt ${strlen} ];do c=${string:$pos:1};case "$c" in [-_.~a-zA-Z0-9])o="${c}";;*)o=$(printf "%%%02X" "'$c");;esac;encoded="${encoded}${o}";pos=$(($pos + 1));done;_func_ret="${encoded}";};calc_signature(){ reset_func_ret;local sorted_key=$(
i=0
while [ $i -lt ${g_pn} ];do
eval key="\$g_pkey_$i"
echo "${key}"
i=$((++i))
done|LC_ALL=C sort
);local query_str="";for key in ${sorted_key};do eval val="\$g_pval_${key}";rawurl_encode "${key}";key_enc=${_func_ret};rawurl_encode "${val}";val_enc=${_func_ret};query_str="${query_str}${key_enc}=${val_enc}&";done;query_str=${query_str%"&"};_debug Query String: ${query_str};rawurl_encode "${query_str}";local encoded_str=${_func_ret};local str_to_signed="GET&%2F&"${encoded_str};_debug String to Signed: ${str_to_signed};local key_sign="${AccessKeySec}&";_func_ret=$(/bin/echo -n ${str_to_signed}|openssl dgst -binary -sha1 -hmac ${key_sign}|openssl enc -base64);};send_request(){ reset_func_ret;calc_signature;local signature=${_func_ret};put_param "Signature" "${signature}";pack_params;local packed_params=${_func_ret};local req_url="${ALiServerAddr}/?${packed_params}";_debug Request addr: ${req_url};local respond=$(curl -3 ${req_url} --silent --connect-timeout 10 -w "HttpCode:%{http_code}");_debug ${respond};_func_ret=${respond};};update_record(){ get_my_ip;local my_ip=${_func_ret};_debug My IP: ${my_ip};if [ -z "${my_ip}" ];then _err Could not get my ip, exitting...;exit;fi;get_domain_ip;local domain_ip=${_func_ret};_debug Current Domain IP: ${domain_ip};if [ "${my_ip}" == "${domain_ip}" ];then _log Need not to update, current IP: ${my_ip};else put_params_public;put_params_UpdateDomainRecord ${my_ip};send_request;_log updated ${my_ip};fi;};_log ${DomainRR}.${DomainName} ${DomainType};_debug AccessKeyId: ${AccessKeyId};_debug AccessKeySec: ${AccessKeySec};update_record