Adding connections api

api/connections.php

@@ -0,0 +1,69 @@
+<?php
+/**
+ * GET /api/connections.php
+ *
+ * Returns connections from the last 10 minutes (or ?minutes=N) as JSON.
+ *
+ * Authentication: same TRIGGER_TOKEN as trigger.php
+ *   Authorization: Bearer <token>
+ *   or ?token=<token>
+ *
+ * Optional query parameters:
+ *   minutes  int  Lookback window in minutes (default 10, max 1440)
+ *   node_id  int  Filter to a specific node
+ */
+
+require_once __DIR__ . '/../includes/functions.php';
+
+header('Content-Type: application/json');
+
+// ── Auth ──────────────────────────────────────────────────────────────────────
+
+if (TRIGGER_TOKEN === '') {
+    http_response_code(503);
+    echo json_encode(['error' => 'API is disabled. Set TRIGGER_TOKEN in config.php.']);
+    exit;
+}
+
+$provided = '';
+$auth_header = $_SERVER['HTTP_AUTHORIZATION'] ?? '';
+if (str_starts_with($auth_header, 'Bearer ')) {
+    $provided = substr($auth_header, 7);
+}
+if ($provided === '' && isset($_REQUEST['token'])) {
+    $provided = $_REQUEST['token'];
+}
+
+if (!hash_equals(TRIGGER_TOKEN, $provided)) {
+    http_response_code(401);
+    echo json_encode(['error' => 'Unauthorized']);
+    exit;
+}
+
+// ── Parameters ────────────────────────────────────────────────────────────────
+
+$minutes = min(1440, max(1, (int)($_GET['minutes'] ?? 10)));
+$node_id = isset($_GET['node_id']) ? (int)$_GET['node_id'] : null;
+
+// ── Query ─────────────────────────────────────────────────────────────────────
+
+$rows = connections_since($minutes, $node_id);
+
+$since = date('Y-m-d\TH:i:s\Z', time() - $minutes * 60);
+
+echo json_encode([
+    'since'   => $since,
+    'minutes' => $minutes,
+    'count'   => count($rows),
+    'connections' => array_map(fn($r) => [
+        'id'          => (int)$r['id'],
+        'occurred_at' => $r['occurred_at'],
+        'node_id'     => (int)$r['node_id'],
+        'node_name'   => $r['node_name'],
+        'src_ip'      => $r['src_ip'],
+        'src_port'    => (int)$r['src_port'],
+        'dst_port'    => (int)$r['dst_port'],
+        'banner_hex'  => $r['banner_hex'],
+        'banner_len'  => (int)$r['banner_len'],
+    ], $rows),
+], JSON_PRETTY_PRINT);