Added external files required for token handling

ext/dayon.sql

@@ -0,0 +1,10 @@
+BEGIN TRANSACTION;
+CREATE TABLE IF NOT EXISTS `tokens` (
+	`token`	TEXT,
+	`assistant`	TEXT,
+	`port`	INTEGER,
+	`assisted`	TEXT,
+	`ts`	INTEGER,
+	PRIMARY KEY(`token`)
+);
+COMMIT;

ext/index.php

@@ -0,0 +1,82 @@
+<?php
+define('DB_NAME', "dayon.db");
+define('TOKEN_LIFETIME', 604800000);
+header('Content-type: text/plain');
+if (isset($_GET['port'])) {
+	$port = clean($_GET['port'], 5);
+    $token = substr(str_shuffle("ABCDEFGHJKLMNPQRSTUVWXYZ123456789"), 0, 6);
+	$token .= checksum($token);
+	$pdo = new PDO('sqlite:'.DB_NAME);
+	echo insertToken(strtoupper($token), $_SERVER['REMOTE_ADDR'], $port, $pdo);
+	if (rand(0, 5) == 5) {
+		removeOldTokens($pdo);
+	}
+}
+
+if (isset($_GET['token'])) {
+	$token = clean($_GET['token'], 7);
+	$pdo = new PDO('sqlite:'.DB_NAME);
+	echo readToken($token, $pdo);
+	updateToken($token, $_SERVER['REMOTE_ADDR'], $pdo);
+}
+
+function clean($val, $maxLen = "") {
+	$val = trim(strip_tags($val));
+	if (!empty($maxLen)) {
+		$val = substr($val, 0, $maxLen);
+	}
+	return $val;
+}
+
+function checksum($in) {
+        return substr(sha1($in), -1);
+}
+
+function insertToken($token, $address, $port, $pdo) {
+    $sql = "INSERT INTO tokens (token,assistant,port,ts) VALUES (:token,:address,:port,:ts)";
+	$date = new DateTime();
+	$ts = $date->getTimestamp();
+        $stmt = $pdo->prepare($sql);
+        $stmt->bindParam(':token', $token, PDO::PARAM_STR, 7);
+        $stmt->bindParam(':address', $address, PDO::PARAM_STR);
+        $stmt->bindParam(':port', $port, PDO::PARAM_INT);
+        $stmt->bindParam(':ts', $ts, PDO::PARAM_INT);
+        $success = $stmt->execute();
+        if (!$success) {
+ 		print_r($stmt->errorInfo());
+	} else {
+		return $token;
+	}
+}
+
+function removeOldTokens($pdo) {
+	$date = new DateTime();
+	$ts = $date->getTimestamp();
+	$delete = "DELETE FROM tokens WHERE ts < ?";
+	$stmt = $pdo->prepare($delete);
+	$stmt->execute(array($ts-TOKEN_LIFETIME));
+}
+
+function readToken($token, $pdo) {
+	$sql = "SELECT assistant,port FROM tokens WHERE token = :token";
+    $stmt = $pdo->prepare($sql);
+	if ($stmt->execute([":token" => $token])) {
+	    $stmt->bindColumn(1, $address);
+	    $stmt->bindColumn(2, $port);
+	    return $stmt->fetch(PDO::FETCH_BOUND) ? "$address*$port" : "";
+	} else {
+	    return "";
+	}
+}
+
+function updateToken($token, $address, $pdo) {
+	$sql = "UPDATE tokens SET assisted = :address,ts = :ts WHERE token = :token";
+	$date = new DateTime();
+	$ts = $date->getTimestamp();
+    $stmt = $pdo->prepare($sql);
+	$stmt->bindParam(':address', $address, PDO::PARAM_STR);
+	$stmt->bindParam(':ts', $ts, PDO::PARAM_INT);
+	$stmt->bindParam(':token', $token, PDO::PARAM_STR, 7);
+	$stmt->execute();
+}
+?>

ext/whatismyip.php

@@ -0,0 +1,4 @@
+<?php
+header('Content-type: text/plain');
+echo $_SERVER['REMOTE_ADDR'];
+?>