From a413bd6aab1904339781d36ecbe9fdec5129799d Mon Sep 17 00:00:00 2001
From: arabezar <arabezar@users.noreply.github.com>
Date: Tue, 14 Jul 2020 07:34:56 +0300
Subject: [PATCH] Synology DSM DNS Server API

Adding/removing TXT records to Synology DSM DNS Server script
---
 dnsapi/dns_synology_dsm.sh | 60 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 dnsapi/dns_synology_dsm.sh

diff --git a/dnsapi/dns_synology_dsm.sh b/dnsapi/dns_synology_dsm.sh
new file mode 100644
index 00000000..5909f96b
--- /dev/null
+++ b/dnsapi/dns_synology_dsm.sh
@@ -0,0 +1,60 @@
+#!/bin/bash
+
+# Here is a script to add/remove TXT records to DNS Server on Synology DSM
+#
+# Author: Arabezar (on github) aka Arkadii Zhuchenko ©13.07.2020
+#
+#returns 0 means success, otherwise error.
+
+_DNS_TTL="1"
+
+########  Public functions #####################
+
+dns_synology_dsm_add() {
+
+  _info "Using API for Synology DSM - adding TXT to Synology DNS Server"
+  
+  fulldomain=$1
+  txtvalue=$2
+  _debug fulldomain "$fulldomain"
+  _debug txtvalue "$txtvalue"
+
+  maindomain="${fulldomain//_acme-challenge\./}"
+  _debug3 maindomain "$maindomain"
+
+  # WebAPI-call can be replaced by adding line to the "/var/packages/DNSServer/target/named/etc/zone/master/$maindomain" file
+  response=$(synowebapi --exec api=SYNO.DNSServer.Zone.Record method=create version=1 runner=admin \
+    zone_name='"'"${maindomain}"'"' \
+    domain_name='"'"${maindomain}"'"' \
+    rr_owner='"'"${fulldomain}"\.'"' \
+    rr_ttl='"'${_DNS_TTL}'"' \
+    rr_type='"'"TXT"'"' \
+    rr_info='"'"${txtvalue}"'"' 2> /dev/null)
+
+  _debug3 response "$response"
+
+  if [ "$(echo "$response" | jq '.success')" == true ]; then
+      return 0
+  fi
+
+  return 1
+}
+
+dns_synology_dsm_rm() {
+
+  _info "Using API for Synology DSM - removing TXT from Synology DNS Server"
+  
+  fulldomain=$1
+  txtvalue=$2
+  _debug fulldomain "$fulldomain"
+  _debug txtvalue "$txtvalue"
+
+  maindomain="${fulldomain//_acme-challenge\./}"
+  _debug3 maindomain "$maindomain"
+
+  # Just removing TXT record from file (calling synowebapi failed due to some bug in specifying "items" param)
+  _dns_zone_url="/var/packages/DNSServer/target/named/etc/zone/master/$maindomain"
+  sed -i "/^${fulldomain}.[[:blank:]]${_DNS_TTL}[[:blank:]]TXT[[:blank:]]\"${txtvalue}\"/d" "$_dns_zone_url"
+
+  return 0
+}