device: Add workaround for Sony Dualshock 4 broken SDP

Sony DualShock 4 is not respecting negotiated L2CAP MTU. This might
results in SDP response being dropped by kernel. Workaround this by
forcing SDP code to use bigger MTU while connecting.

diff --git a/src/device.c b/src/device.c
index 1bd27a1..76b876e 100644 (file)
--- a/src/device.c
+++ b/src/device.c
@@ -118,6 +118,7 @@ struct browse_req {
        int search_uuid;
        int reconnect_attempt;
        guint listener_id;
+       uint16_t sdp_flags;
 };
 
 struct included_search {
@@ -2971,7 +2972,8 @@ static void browse_cb(sdp_list_t *recs, int err, gpointer user_data)
                sdp_uuid16_create(&uuid, uuid_list[req->search_uuid++]);
                bt_search_service(btd_adapter_get_address(adapter),
                                                &device->bdaddr, &uuid,
-                                               browse_cb, user_data, NULL, 0);
+                                               browse_cb, user_data, NULL,
+                                               req->sdp_flags);
                return;
        }
 
@@ -3498,6 +3500,23 @@ done:
        return 0;
 }
 
+static uint16_t get_sdp_flags(struct btd_device *device)
+{
+       uint16_t vid, pid;
+
+       vid = btd_device_get_vendor(device);
+       pid = btd_device_get_product(device);
+
+       /* Sony DualShock 4 is not respecting negotiated L2CAP MTU. This might
+        * results in SDP response being dropped by kernel. Workaround this by
+        * forcing SDP code to use bigger MTU while connecting.
+        */
+       if (vid == 0x054c && pid == 0x05c4)
+               return SDP_LARGE_MTU;
+
+       return 0;
+}
+
 static int device_browse_sdp(struct btd_device *device, DBusMessage *msg)
 {
        struct btd_adapter *adapter = device->adapter;
@@ -3512,9 +3531,11 @@ static int device_browse_sdp(struct btd_device *device, DBusMessage *msg)
        req->device = device;
        sdp_uuid16_create(&uuid, uuid_list[req->search_uuid++]);
 
+       req->sdp_flags = get_sdp_flags(device);
+
        err = bt_search_service(btd_adapter_get_address(adapter),
                                &device->bdaddr, &uuid, browse_cb, req, NULL,
-                               0);
+                               req->sdp_flags);
        if (err < 0) {
                browse_request_free(req);
                return err;