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@moesoha
Created July 15, 2022 04:36
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Juniper DDNS script
version 1.0;
ns junos = "http://xml.juniper.net/junos/*/junos";
ns jcs = "http://xml.juniper.net/junos/commit-scripts/1.0";
ns curl extension = "http://xml.libslax.org/curl";
import "../import/junos.xsl";
/*
put this file as /var/db/scripts/op/update-ddns.slax
and then configure:
system {
scripts {
op {
file update-ddns.slax {
command update-ddns;
routing-instance somewhere; // optional, add this if you want to send update with non-default instance
}
}
}
services {
apply-macro ddns:he-example {
type HE;
hostname example.com;
password 114514;
interface pp0.0; // IP source, optional
}
}
}
event-options {
generate-event {
every-10min time-interval 600;
}
policy ddns-update {
events [ snmp_trap_link_up every-10min ];
attributes-match {
snmp_trap_link_up.interface-name matches pp0.0;
}
then {
execute-commands {
commands {
"ping 1 count 5 interval 1 wait 1"; // wait 5s for pp0.0 to be online
"op update-ddns";
}
}
}
}
}
*/
match / {
var $configs = jcs:invoke(<get-configuration> {
<configuration> {
<system> {
<services> {
<apply-macro>;
}
}
}
}, "no-login-logout");
for-each ($configs//apply-macro[starts-with(./name, 'ddns:')]) {
expr jcs:output('Processing config ' _ ./name);
call update-ddns($config=.);
}
}
template update-ddns($config) {
var $address = {
if ($config/data[./name="interface"]) {
var $iface = jcs:invoke(<get-interface-information> {
<interface-name> $config/data[./name="interface"]/value;
});
expr $iface//address-family[./address-family-name="inet"]/interface-address/ifa-local[1];
}
};
var $hostname = $config/data[./name="hostname"]/value;
if ($config/data[./name="type"][value="HE"]) {
var $curlParam := {
<insecure>; /* TOO LAZY TO IMPORT CA CERTIFICATE BUNDLE */
<url> 'https://dyn.dns.he.net/nic/update';
<method> 'POST';
<param name="hostname"> $hostname;
<param name="password"> $config/data[./name="password"]/value;
if ($address) {
<param name="myip"> $address;
}
};
if ($address) {
expr jcs:output('[HE:' _ $hostname _ '] Updating to address ' _ $address);
} else {
expr jcs:output('[HE:' _ $hostname _ '] Updating');
}
var $curlResult = curl:single($curlParam);
if (not($curlResult/curl-success)) {
expr jcs:output('[HE:' _ $hostname _ '] cURL error: ' _ $curlResult//error);
} else if ($curlResult//headers/code = 200) {
expr jcs:output('[HE:' _ $hostname _ '] Success with content: ' _ $curlResult//raw-data);
} else {
expr jcs:output('[HE:' _ $hostname _ '] Failed with content: ' _ $curlResult//raw-data);
}
}
}
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