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hlissner/synology-ddns.linode.php

Last active July 29, 2022 14:44
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  1. Henrik Lissner revised this gist Nov 20, 2021. 2 changed files with 0 additions and 32 deletions.
    32 changes: 0 additions & 32 deletions 2.linode-api.org
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    Original file line number Diff line number Diff line change
    @@ -1,32 +0,0 @@
    #+TITLE: How to acquire domain and resource IDs

    ** Acquiring the domain ID
    #+BEGIN_SRC sh :exports code :results output
    APIKEY=...
    curl -H "Authorization: Bearer $APIKEY" \
    -H "Accept: application/json" \
    https://api.linode.com/v4/domains | jq
    #+END_SRC

    ** Acquiring the resource ID
    #+BEGIN_SRC sh :exports code :results output
    APIKEY=...
    DOMAIN=1234567
    curl -H "Authorization: Bearer $APIKEY" \
    -H "Accept: application/json" \
    "https://api.linode.com/v4/domains/$DOMAIN/records" | jq
    #+END_SRC

    ** Updating a resource's DNS record
    #+BEGIN_SRC sh
    APIKEY=...
    DOMAIN=1234567
    RECORD=12345678
    IP=123.123.123.123
    curl -H "Authorization: Bearer $APIKEY" \
    -H "Accept: application/json" \
    -H "Content-Type: application/json" \
    -X PUT \
    -d "{\"target\":\"$IP\"}" \
    "https://api.linode.com/v4/domains/$DOMAIN/records/$RECORD"
    #+END_SRC
    0 1.synology-ddns.linode.php → synology-ddns.linode.php
    View file
    File renamed without changes.
  2. Henrik Lissner created this gist Nov 20, 2021.
    92 changes: 92 additions & 0 deletions 1.synology-ddns.linode.php
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    Original file line number Diff line number Diff line change
    @@ -0,0 +1,92 @@
    #!/usr/bin/php -d open_basedir=/usr/syno/bin/ddns
    <?php

    if ($argc !== 5) {
    echo 'badparam';
    exit();
    }

    // Entered into DSM (Control Panel > External Access > DDNS)
    $username = (string) $argv[1]; // Resource ID
    $password = (string) $argv[2]; // API Key
    $hostname = (string) $argv[3]; // DomainID.domain (e.g. 1234567.henrik.io)
    $ip = (string) $argv[4]; // External address

    $token = $password;
    $domainId = explode('.', $hostname)[0];
    $resourceId = $username;

    // only for IPv4 format
    if (!filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) {
    echo "badparam";
    exit();
    }

    function linode_request($curl, $token, $uri, $fields = [], $type = 'GET')
    {
    $BASE_URL = 'https://api.linode.com/v4';
    $HEADERS = [
    'Authorization: Bearer '.$token,
    'Content-type: application/json',
    ];

    curl_setopt($curl, CURLOPT_URL, $BASE_URL.$uri);
    curl_setopt($curl, CURLOPT_CUSTOMREQUEST, $type);
    curl_setopt($curl, CURLOPT_HTTPHEADER, $HEADERS);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    if (count($fields) > 0) {
    curl_setopt($curl, CURLOPT_POST, true);
    curl_setopt($curl, CURLOPT_POSTFIELDS, json_encode($fields));
    array_push($HEADERS, 'Accept: application/json');
    } else {
    curl_setopt($curl, CURLOPT_POST, false);
    }
    $res = curl_exec($curl);
    $http_status = curl_getinfo($curl, CURLINFO_HTTP_CODE);

    $error = null;
    switch ($http_status) {
    case 200: break;
    case 401: $error = 'badauth'; break;
    default : $error = '911'; break;
    }
    if ($error !== null) {
    echo $error;
    curl_close($curl):
    exit(-1);
    }
    return json_decode($res, true);
    }


    $req = curl_init();

    //
    $json = linode_request($req, $token, 'GET', "/domains/$domainId/records");
    if ($json['results'] < 1) {
    echo 'nohost';
    curl_close($req);
    exit();
    }

    $record = null;
    foreach($json['data'] as $row) {
    if ($row['type'] == 'A' && (string) $row['id'] == $resourceId) {
    $record = $row['target'];
    }
    }
    if ($record === null) {
    echo 'nohost';
    curl_close($req);
    exit();
    }
    if ($record == $ip) {
    echo 'nochg';
    curl_close($req);
    exit();
    }

    //
    linode_request($req, $token, 'PUT', "/domains/$domainId/records/$resourceId", [ 'target' => $ip ]);
    curl_close($req);
    echo 'good';
    32 changes: 32 additions & 0 deletions 2.linode-api.org
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,32 @@
    #+TITLE: How to acquire domain and resource IDs

    ** Acquiring the domain ID
    #+BEGIN_SRC sh :exports code :results output
    APIKEY=...
    curl -H "Authorization: Bearer $APIKEY" \
    -H "Accept: application/json" \
    https://api.linode.com/v4/domains | jq
    #+END_SRC

    ** Acquiring the resource ID
    #+BEGIN_SRC sh :exports code :results output
    APIKEY=...
    DOMAIN=1234567
    curl -H "Authorization: Bearer $APIKEY" \
    -H "Accept: application/json" \
    "https://api.linode.com/v4/domains/$DOMAIN/records" | jq
    #+END_SRC

    ** Updating a resource's DNS record
    #+BEGIN_SRC sh
    APIKEY=...
    DOMAIN=1234567
    RECORD=12345678
    IP=123.123.123.123
    curl -H "Authorization: Bearer $APIKEY" \
    -H "Accept: application/json" \
    -H "Content-Type: application/json" \
    -X PUT \
    -d "{\"target\":\"$IP\"}" \
    "https://api.linode.com/v4/domains/$DOMAIN/records/$RECORD"
    #+END_SRC