用于OpenWRT的腾讯云DNS自动更新脚本

openwrt_hotplug_for_qcloud.sh

#!/bin/sh
#
# Howto
#   1. Install pkgs by run `opkg install ca-bundle openssl-util libustream-openssl`
#   1. Upload this script to your OpenWRT router.
#   2. Save as /etc/hotplug.d/iface/99-ddns.
#   3. Replace the VARIABLES below.
#   4. Enjoy!

# variables should be changed 
DOMAIN="yourname.com"
RECORD_ID=123456789
SUB_DOMAIN="home"
SECID="YOUR_SECRET_ID"
SECKEY="YOUR_SECRET_KEY"


###################### DO NOT CHANGE ANYTHING BELOW ######################
[ "$ACTION" = ifup ] || exit 0
[ "$INTERFACE" = wan ] || exit 0
ip=$(ifconfig pppoe-wan | grep inet | awk '{print $2}' | cut -c 6-)

TIMESTAMP=$(date +%s)

# Construct the query with MANUAL order, DO NOT REORDER THEM
QUERY="Action=RecordModify"
QUERY="${QUERY}&Nonce=${TIMESTAMP}"
QUERY="${QUERY}&SecretId=${SECID}"
QUERY="${QUERY}&Timestamp=${TIMESTAMP}"
QUERY="${QUERY}&domain=${DOMAIN}"
QUERY="${QUERY}&recordId=${RECORD_ID}"
QUERY="${QUERY}&recordLine=默认"
QUERY="${QUERY}&recordType=A"
QUERY="${QUERY}&subDomain=${SUB_DOMAIN}"
QUERY="${QUERY}&value=${ip}"

# Generate signature
STR="POSTcns.api.qcloud.com/v2/index.php?${QUERY//_/.}"

# hexdump and sed are URLEncode hack
SIGNATURE=$(echo -n "${STR}" | openssl sha1 -binary -hmac "${SECKEY}" | openssl base64 | hexdump -v -e '/1 "%02x"' | sed 's/\(..\)/%\1/g')

wget --post-data="${QUERY}&Signature=${SIGNATURE}" -O - https://cns.api.qcloud.com/v2/index.php