Linode support for ddclient (updated for Debian bullseye package 3.9.1-7)

linode-support.diff

--- a/ddclient
+++ b/ddclient
@@ -764,6 +764,16 @@
             $variables{'service-common-defaults'},
             ),
     },
+    'linode' => {
+        'updateable' => undef,
+        'update'     => \&nic_linode_update,
+        'examples'   => \&nic_linode_examples,
+        'variables'  => merge(
+                          { 'server'       => setv(T_FQDNP,  1, 0, 1, 'api.linode.com',   undef)    },
+                          { 'min-interval' => setv(T_DELAY,  0, 0, 1, 0, interval('5m')),},
+                          $variables{'service-common-defaults'},
+                        ),
+    },
 );
 $variables{'merged'} = merge($variables{'global-defaults'},
     $variables{'service-common-defaults'},
@@ -3825,6 +3835,86 @@
             $config{$h}{'ip'}     = $ip;
             $config{$h}{'mtime'}  = $now;
             $config{$h}{'status'} = 'good';
+            success("updating %s: good: IP address set to %s", $h, $ip);
+        } else {
+            $config{$h}{'status'} = 'failed';
+            warning("SENT:    %s", $url) unless opt('verbose');
+            warning("REPLIED: %s", $reply);
+            failed("updating %s: Invalid reply.", $h);
+        }
+    }
+}
+
+######################################################################
+
+######################################################################
+## nic_linode_examples
+######################################################################
+sub nic_linode_examples {
+    return <<EoEXAMPLE;
+
+o 'linode'
+
+The 'linode' protocol is used by DNS services offered by www.linode.com.
+
+Configuration variables applicable to the 'linode' protocol are:
+  protocol=linode              ##
+  server=fqdn.of.service       ## defaults to api.linode.com
+  login=domain-id              ## domain id from the service
+  password=linode-api-key      ## api key from service account
+  resourceid                   ## id of the A record for the domain from the service
+
+Example ${program}.conf file entries:
+  ## single host update
+  protocol=linode,                                         \\
+  login=my-linode.com-domain-id,                           \\
+  password=my-linode.com-api-key                           \\
+  my-linode.com-resource-id
+
+EoEXAMPLE
+}
+######################################################################
+## nic_linode_update
+##
+## written by Mike W. Smith
+##
+## based on http://www.linode.com/api/?method=domain.resource.update
+## needs this url to update:
+## #https://api.linode.com?api_key=my_api_key&api_action=domain.resource.update&DomainID=my_domain_id&ResourceID=my_resource_id&Target=my_ip
+##
+######################################################################
+sub nic_linode_update {
+
+
+    debug("\nnic_linode_update -------------------");
+
+    ## update each configured host
+    foreach my $h (@_) {
+        my $ip = delete $config{$h}{'wantip'};
+        info("setting IP address to %s for %s", $ip, $h);
+        verbose("UPDATE:","updating %s", $h);
+
+        my $url;
+        $url   = "https://$config{$h}{'server'}/";
+        $url  .= "?api_key=$config{$h}{'password'}";
+        $url  .= "&api_action=domain.resource.update";
+        $url  .= "&DomainID=$config{$h}{'login'}";
+        $url  .= "&ResourceID=$h";
+        $url  .= "&Target=";
+        $url  .= $ip if $ip;
+
+        my $reply = geturl(opt('proxy'), $url);
+        if (!defined($reply) || !$reply) {
+            failed("updating %s: Could not connect to %s.", $h, $config{$h}{'server'});
+            last;
+        }
+        last if !header_ok($h, $reply);
+
+        my @reply = split /\n/, $reply;
+        if (grep /\[\]/i, @reply) {
+            $config{$h}{'ip'}     = $ip;
+            $config{$h}{'mtime'}  = $now;
+            $config{$h}{'status'} = 'good';
             success("updating %s: good: IP address set to %s", $h, $ip);
         } else {
             $config{$h}{'status'} = 'failed';

Hi David, would it be possible to contribute your code also to the ddclient git repository?

This patch was originally found here.

Hi David, thank you for the info. Since you have experience patching this part in the code, can you add the patch on the ddclient so that others can benefit, too, and you don't have to re-patch on every new release :)?

Hi @rfc4711,
Unfortunately I don't use this patch anymore (although I might use it in the future).
I've reapplied the patch to the latest upstream source, you can find it here: https://github.com/amoe/ddclient/tree/feature_provider_linode