ddclient: T5612: Enable TTL support for web-service based protocols

Enable TTL support for web-service based protocols in addition to
RFC2136 based (nsupdate) protocol.

Since TTL is not supported by all protocols, and thus cannot have a
configuration default, the existing XML snippet `include/dns/time-to-live.xml.i`
does not have common `<defaultValue>300</defaultValue>` anymore and is
instead added explicitly whenever necessary.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/conf_mode/dns_dynamic.py b/src/conf_mode/dns_dynamic.py
index 84c983ee3..5150574a8 100755
--- a/src/conf_mode/dns_dynamic.py
+++ b/src/conf_mode/dns_dynamic.py
@@ -35,6 +35,9 @@ zone_required = ['cloudflare', 'godaddy', 'hetzner', 'gandi', 'nfsn']
 # Protocols that do not require username
 username_unnecessary = ['1984', 'cloudflare', 'cloudns', 'duckdns', 'freemyip', 'hetzner', 'keysystems', 'njalla']
 
+# Protocols that support TTL
+ttl_supported = ['cloudflare', 'gandi', 'hetzner', 'dnsexit', 'godaddy', 'nfsn']
+
 # Protocols that support both IPv4 and IPv6
 dualstack_supported = ['cloudflare', 'dyndns2', 'freedns', 'njalla']
 
@@ -97,6 +100,9 @@ def verify(dyndns):
                     if 'username' not in config:
                         raise ConfigError(f'"username" {error_msg}')
 
+                if config['protocol'] not in ttl_supported and 'ttl' in config:
+                    raise ConfigError(f'"{config["protocol"]}" does not support "ttl"')
+
                 if config['ip_version'] == 'both':
                     if config['protocol'] not in dualstack_supported:
                         raise ConfigError(f'"{config["protocol"]}" does not support '