Bluetooth (FreeBSD): add support (not tested)

src/detection/bluetooth/bluetooth_bsd.c

@@ -0,0 +1,25 @@
+#include "bluetooth.h"
+
+#define L2CAP_SOCKET_CHECKED
+#include <bluetooth.h>
+
+static int enumDev(FF_MAYBE_UNUSED int sockfd, struct bt_devinfo const* dev, FFlist* devices)
+{
+    FFBluetoothResult* device = ffListAdd(devices);
+    ffStrbufInitS(&device->name, bt_devremote_name_gen(dev->devname, &dev->bdaddr));
+    ffStrbufInitS(&device->address, bt_ntoa(&dev->bdaddr, NULL));
+    ffStrbufUpperCase(&device->address);
+    ffStrbufInit(&device->type);
+    device->battery = 0;
+    device->connected = true;
+    return 0;
+}
+
+const char* ffDetectBluetooth(FF_MAYBE_UNUSED FFBluetoothOptions* options, FF_MAYBE_UNUSED FFlist* devices /* FFBluetoothResult */)
+{
+    // struct hostent* ent = bt_gethostent();
+    if (bt_devenum((void*) enumDev, devices) < 0)
+        return "bt_devenum() failed";
+
+    return 0;
+}