diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..dfe0770
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,2 @@
+# Auto detect text files and perform LF normalization
+* text=auto
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..eab6fcc
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,339 @@
+GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc., <http://fsf.org/>
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
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+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
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+operating system on which the executable runs, unless that component
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+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    
+    Copyright (C) 2018  Sense
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  {signature of Ty Coon}, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
\ No newline at end of file
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..9c58fc3
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,70 @@
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=ddns-scripts_aliyun
+PKG_VERSION:=1.0.0
+PKG_RELEASE:=1
+
+PKG_LICENSE:=GPLv2
+PKG_MAINTAINER:=Sense <sensec@gmail.com>
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/$(PKG_NAME)
+	SECTION:=net
+	CATEGORY:=Network
+	SUBMENU:=IP Addresses and Names
+	TITLE:=DDNS extension for AliYun.com
+	PKGARCH:=all
+	DEPENDS:=+ddns-scripts +wget +openssl-util
+endef
+
+define Package/$(PKG_NAME)/description
+	Dynamic DNS Client scripts extension for AliYun.com
+endef
+
+define Build/Configure
+endef
+
+define Build/Compile
+	$(CP) ./*.sh $(PKG_BUILD_DIR)
+endef
+
+define Package/$(PKG_NAME)/preinst
+	#!/bin/sh
+	# if NOT run buildroot then stop service
+	[ -z "$${IPKG_INSTROOT}" ] && /etc/init.d/ddns stop >/dev/null 2>&1
+	exit 0 # suppress errors
+endef
+
+define Package/$(PKG_NAME)/install
+	$(INSTALL_DIR) $(1)/usr/lib/ddns
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/update_aliyun_com.sh $(1)/usr/lib/ddns
+endef
+
+define Package/$(PKG_NAME)/postinst
+	#!/bin/sh
+	# remove old services file entries
+	/bin/sed -i '/aliyun\.com/d' $${IPKG_INSTROOT}/etc/ddns/services >/dev/null 2>&1
+	/bin/sed -i '/aliyun\.com/d' $${IPKG_INSTROOT}/etc/ddns/services_ipv6 >/dev/null 2>&1
+	# and create new
+	printf "%s\\t\\t%s\\n" '"aliyun.com"' '"update_aliyun_com.sh"' >> $${IPKG_INSTROOT}/etc/ddns/services
+	printf "%s\\t\\t%s\\n" '"aliyun.com"' '"update_aliyun_com.sh"' >> $${IPKG_INSTROOT}/etc/ddns/services_ipv6
+	# on real system restart service if enabled
+	[ -z "$${IPKG_INSTROOT}" ] && {
+		/etc/init.d/ddns enabled && \
+			/etc/init.d/ddns start >/dev/null 2>&1
+	}
+	exit 0 # suppress errors
+endef
+
+define Package/$(PKG_NAME)/prerm
+	#!/bin/sh
+	# if NOT run buildroot then stop service
+	[ -z "$${IPKG_INSTROOT}" ] && /etc/init.d/ddns stop >/dev/null 2>&1
+	# remove services file entries
+	/bin/sed -i '/aliyun\.com/d' $${IPKG_INSTROOT}/etc/ddns/services >/dev/null 2>&1
+	/bin/sed -i '/aliyun\.com/d' $${IPKG_INSTROOT}/etc/ddns/services_ipv6 >/dev/null 2>&1
+	exit 0 # suppress errors
+endef
+
+$(eval $(call BuildPackage,$(PKG_NAME)))
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..55f00b3
--- /dev/null
+++ b/README.md
@@ -0,0 +1,8 @@
+# ddns-scripts_aliyun
+适用于 OpenWRT/LEDE 自带DDNS客户端的阿里云更新脚本
+
+依赖: ddns-scripts wget openssl-util
+建议安装: luci-app-ddns
+
+
+安装后在DDNS服务提供商一栏多出一个 aliyun.com，详情见论坛介绍帖“[分享]适用于OpenWRT/LEDE自带DDNS功能的阿里云脚本，完美嵌入” (http://www.right.com.cn/forum/thread-267501-1-1.html)
diff --git a/update_aliyun_com.sh b/update_aliyun_com.sh
new file mode 100644
index 0000000..4f5ac88
--- /dev/null
+++ b/update_aliyun_com.sh
@@ -0,0 +1,233 @@
+#!/bin/sh
+#
+# 用于阿里云解析的DNS更新脚本
+# 2017-2018 Sense <sensec at gmail dot com>
+# 阿里云解析API文档 https://help.aliyun.com/document_detail/29739.html
+#
+# 本脚本由 dynamic_dns_functions.sh 内的函数 send_update() 调用
+#
+# 需要在 /etc/config/ddns 中设置的选项
+# option username - 阿里云API访问账号 Access Key ID。可通过 aliyun.com 帐号管理的 accesskeys 获取, 或者访问 https://ak-console.aliyun.com
+# option password - 阿里云API访问密钥 Access Key Secret
+# option domain   - 完整的域名。建议主机与域名之间使用 @符号 分隔，否则将以第一个 .符号 之前的内容作为主机名
+#
+
+# 检查传入参数
+[ -z "$username" ] && write_log 14 "配置错误！保存阿里云API访问账号的'用户名'不能为空"
+[ -z "$password" ] && write_log 14 "配置错误！保存阿里云API访问密钥的'密码'不能为空"
+
+# 检查外部调用工具
+[ -n "$WGET_SSL" ] || write_log 13 "使用阿里云API需要 GNU Wget 支持，请先安装"
+command -v sed >/dev/null 2>&1 || write_log 13 "使用阿里云API需要 sed 支持，请先安装"
+command -v openssl >/dev/null 2>&1 || write_log 13 "使用阿里云API需要 openssl-util 支持，请先安装"
+
+# 包含用于解析 JSON 格式返回值的函数
+. /usr/share/libubox/jshn.sh
+
+# 变量声明
+local __HOST __DOMAIN __TYPE __URLBASE __CMDBASE __URLARGS __SEPARATOR __RECID
+[ $use_https -eq 0 ] && __URLBASE="http://alidns.aliyuncs.com/" || __URLBASE="https://alidns.aliyuncs.com/"
+__SEPARATOR="&"
+
+# 从 $domain 分离主机和域名
+[ "${domain:0:2}" == "@." ] && domain="${domain/./}" # 主域名处理
+[ "$domain" == "${domain/@/}" ] && domain="${domain/./@}" # 未找到分隔符，兼容常用域名格式
+__HOST="${domain%%@*}"
+__DOMAIN="${domain#*@}"
+[ -z "$__HOST" -o "$__HOST" == "$__DOMAIN" ] && __HOST="@"
+
+# 设置记录类型
+[ $use_ipv6 -eq 0 ] && __TYPE="A" || __TYPE="AAAA"
+
+# 构造基本通信命令
+build_command() {
+	__CMDBASE="$WGET_SSL -nv -t 1 -O $DATFILE -o $ERRFILE"
+	# 绑定用于通信的主机/IP
+	if [ -n "$bind_network" ]; then
+		local bind_ip run_prog
+		[ $use_ipv6 -eq 0 ] && run_prog="network_get_ipaddr" || run_prog="network_get_ipaddr6"
+		eval "$run_prog bind_ip $bind_network" || \
+			write_log 13 "Can not detect local IP using '$run_prog $bind_network' - Error: '$?'"
+		write_log 7 "Force communication via IP '$bind_ip'"
+		__CMDBASE="$__CMDBASE --bind-address=$bind_ip"
+	fi
+	# 强制设定IP版本
+	if [ $force_ipversion -eq 1 ]; then
+		[ $use_ipv6 -eq 0 ] && __CMDBASE="$__CMDBASE -4" || __CMDBASE="$__CMDBASE -6"
+	fi
+	# 设置CA证书参数
+	if [ $use_https -eq 1 ]; then
+		if [ "$cacert" = "IGNORE" ]; then
+			__CMDBASE="$__CMDBASE --no-check-certificate"
+		elif [ -f "$cacert" ]; then
+			__CMDBASE="$__CMDBASE --ca-certificate=${cacert}"
+		elif [ -d "$cacert" ]; then
+			__CMDBASE="$__CMDBASE --ca-directory=${cacert}"
+		elif [ -n "$cacert" ]; then
+			write_log 14 "No valid certificate(s) found at '$cacert' for HTTPS communication"
+		fi
+	fi
+	# 如果没有设置，禁用代理 (这可能是 .wgetrc 或环境设置错误)
+	[ -z "$proxy" ] && __CMDBASE="$__CMDBASE --no-proxy"
+}
+
+# 用于阿里云API的通信函数
+aliyun_transfer() {
+	local __PARAM="$@"
+	local __CNT=0
+	local __RUNPROG __ERR PID_SLEEP
+
+	[ $# -eq 0 ] && write_log 12 "Error in 'aliyun_transfer()' - wrong number of parameters"
+
+	while : ; do
+		build_Request $__PARAM
+		__RUNPROG="$__CMDBASE '${__URLBASE}?${__URLARGS}'"
+
+		write_log 7 "#> $__RUNPROG"
+		eval $__RUNPROG
+		__ERR=$?
+		[ $__ERR -eq 0 ] && return 0
+
+		write_log 3 "GNU Wget Error: '$__ERR'"
+		write_log 7 "$(cat $ERRFILE)"
+
+		if [ $VERBOSE -gt 1 ]; then
+			write_log 4 "Transfer failed - Verbose Mode: $VERBOSE - NO retry on error"
+			return 1
+		fi
+
+		__CNT=$(( $__CNT + 1 ))
+		[ $retry_count -gt 0 -a $__CNT -gt $retry_count ] && \
+			write_log 14 "Transfer failed after $retry_count retries"
+
+		write_log 4 "Transfer failed - retry $__CNT/$retry_count in $RETRY_SECONDS seconds"
+		sleep $RETRY_SECONDS &
+		PID_SLEEP=$!
+		wait $PID_SLEEP
+		PID_SLEEP=0
+	done
+}
+
+# 百分号编码
+percentEncode() {
+	if [ -z "${1//[A-Za-z0-9_.~-]/}" ]; then
+		echo -n "$1"
+	else
+		local string=$1; local i=0; local ret chr
+		while [ $i -lt ${#string} ]; do
+			chr=${string:$i:1}
+			[ -z "${chr#[^A-Za-z0-9_.~-]}" ] && chr=$(printf '%%%02X' "'$chr")
+			ret="$ret$chr"
+			i=$(( $i + 1 ))
+		done
+		echo -n "$ret"
+	fi
+}
+
+# 构造阿里云解析请求参数
+build_Request() {
+	local args="$@"; local string
+	local HTTP_METHOD="GET"
+
+	# 添加请求参数
+	__URLARGS=
+	for string in $args; do
+		case "${string%%=*}" in
+			Format|Version|AccessKeyId|SignatureMethod|Timestamp|SignatureVersion|SignatureNonce|Signature) ;; # 过滤公共参数
+			*) __URLARGS="$__URLARGS${__SEPARATOR}"$(percentEncode "${string%%=*}")"="$(percentEncode "${string#*=}");;
+		esac
+	done
+	__URLARGS="${__URLARGS:1}"
+
+	# 附加公共参数
+	string="Format=JSON"; __URLARGS="$__URLARGS${__SEPARATOR}"$(percentEncode "${string%%=*}")"="$(percentEncode "${string#*=}")
+	string="Version=2015-01-09"; __URLARGS="$__URLARGS${__SEPARATOR}"$(percentEncode "${string%%=*}")"="$(percentEncode "${string#*=}")
+	string="AccessKeyId=$username"; __URLARGS="$__URLARGS${__SEPARATOR}"$(percentEncode "${string%%=*}")"="$(percentEncode "${string#*=}")
+	string="SignatureMethod=HMAC-SHA1"; __URLARGS="$__URLARGS${__SEPARATOR}"$(percentEncode "${string%%=*}")"="$(percentEncode "${string#*=}")
+	string="Timestamp="$(date -u '+%Y-%m-%dT%H:%M:%SZ'); __URLARGS="$__URLARGS${__SEPARATOR}"$(percentEncode "${string%%=*}")"="$(percentEncode "${string#*=}")
+	string="SignatureVersion=1.0"; __URLARGS="$__URLARGS${__SEPARATOR}"$(percentEncode "${string%%=*}")"="$(percentEncode "${string#*=}")
+	string="SignatureNonce="$(cat '/proc/sys/kernel/random/uuid'); __URLARGS="$__URLARGS${__SEPARATOR}"$(percentEncode "${string%%=*}")"="$(percentEncode "${string#*=}")
+
+	# 对请求参数进行排序，用于生成签名
+	string=$(echo -n "$__URLARGS" | sed 's/\'"${__SEPARATOR}"'/\n/g' | sort | sed ':label; N; s/\n/\'"${__SEPARATOR}"'/g; b label')
+	# 构造用于计算签名的字符串
+	string="${HTTP_METHOD}${__SEPARATOR}"$(percentEncode "/")"${__SEPARATOR}"$(percentEncode "$string")
+	# 字符串计算签名HMAC值
+	local signature=$(echo -n "$string" | openssl dgst -sha1 -hmac "${password}&" -binary)
+	# HMAC值编码成字符串，得到签名值
+	signature=$(echo -n "$signature" | openssl base64)
+
+	# 附加签名参数
+	string="Signature=$signature"; __URLARGS="$__URLARGS${__SEPARATOR}"$(percentEncode "${string%%=*}")"="$(percentEncode "${string#*=}")
+}
+
+# 添加解析记录
+add_domain() {
+	local value
+	aliyun_transfer "Action=AddDomainRecord" "DomainName=${__DOMAIN}" "RR=${__HOST}" "Type=${__TYPE}" "Value=${__IP}" || write_log 14 "服务器通信失败"
+	json_cleanup; json_load "$(cat "$DATFILE" 2> /dev/null)" >/dev/null 2>&1
+	json_get_var value "RecordId"
+	[ -z "$value" ] && write_log 14 "添加新解析记录失败"
+	write_log 7 "添加新解析记录成功"
+	return 0
+}
+
+# 修改解析记录
+update_domain() {
+	local value
+	aliyun_transfer "Action=UpdateDomainRecord" "RecordId=${__RECID}" "RR=${__HOST}" "Type=${__TYPE}" "Value=${__IP}" || write_log 14 "服务器通信失败"
+	json_cleanup; json_load "$(cat "$DATFILE" 2> /dev/null)" >/dev/null 2>&1
+	json_get_var value "RecordId"
+	[ -z "$value" ] && write_log 14 "修改解析记录失败"
+	write_log 7 "修改解析记录成功"
+	return 0
+}
+
+# 启用解析记录
+enable_domain() {
+	local value
+	aliyun_transfer "Action=SetDomainRecordStatus" "RecordId=${__RECID}" "Status=Enable" || write_log 14 "服务器通信失败"
+	json_cleanup; json_load "$(cat "$DATFILE" 2> /dev/null)" >/dev/null 2>&1
+	json_get_var value "Status"
+	[ "$value" != "Enable" ] && write_log 14 "启用解析记录失败"
+	write_log 7 "启用解析记录成功"
+	return 0
+}
+
+# 获取子域名解析记录列表
+describe_domain() {
+	local value type; local ret=0
+	aliyun_transfer "Action=DescribeSubDomainRecords" "SubDomain=${__HOST}.${__DOMAIN}" || write_log 14 "服务器通信失败"
+	json_cleanup; json_load "$(cat "$DATFILE" 2> /dev/null)" >/dev/null 2>&1
+	json_get_var value "TotalCount"
+	if [ $value -eq 0 ]; then
+		write_log 7 "解析记录不存在"
+		ret=1
+	else
+		json_select "DomainRecords" >/dev/null 2>&1
+		json_select "Record" >/dev/null 2>&1
+		json_select 1 >/dev/null 2>&1
+		json_get_var value "Locked"
+		[ $value -ne 0 ] && write_log 14 "解析记录被锁定"
+		json_get_var __RECID "RecordId"
+		write_log 7 "获得解析记录ID: ${__RECID}"
+		json_get_var value "Status"
+		[ "$value" != "ENABLE" ] && ret=$(( $ret | 2 )) && write_log 7 "解析记录被禁用"
+		json_get_var type "Type"
+		json_get_var value "Value"
+		[ "$type" != "${__TYPE}" -o "$value" != "${__IP}" ] && ret=$(( $ret | 4 )) && write_log 7 "地址或类型需要修改"
+	fi
+	return $ret
+}
+
+build_command
+describe_domain
+ret=$?
+if [ $ret -eq 1 ]; then
+	sleep 3 && add_domain
+else
+	[ $(( $ret & 2 )) -ne 0 ] && sleep 3 && enable_domain
+	[ $(( $ret & 4 )) -ne 0 ] && sleep 3 && update_domain
+fi
+
+return 0