1 /******************************************************************************
2  *
3  *  Copyright (C) 2014 Google, Inc.
4  *
5  *  Licensed under the Apache License, Version 2.0 (the "License");
6  *  you may not use this file except in compliance with the License.
7  *  You may obtain a copy of the License at:
8  *
9  *  http://www.apache.org/licenses/LICENSE-2.0
10  *
11  *  Unless required by applicable law or agreed to in writing, software
12  *  distributed under the License is distributed on an "AS IS" BASIS,
13  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  *  See the License for the specific language governing permissions and
15  *  limitations under the License.
16  *
17  ******************************************************************************/
18 
19 #pragma once
20 
21 #include "allocator.h"
22 #include "bt_types.h"
23 #include "hci_layer.h"
24 
25 typedef void (*transmit_finished_cb)(BT_HDR *packet, bool all_fragments_sent);
26 typedef void (*packet_reassembled_cb)(BT_HDR *packet);
27 typedef void (*packet_fragmented_cb)(BT_HDR *packet, bool send_transmit_finished);
28 
29 typedef struct {
30   // Called for every packet fragment.
31   packet_fragmented_cb fragmented;
32 
33   // Called for every completely reassembled packet.
34   packet_reassembled_cb reassembled;
35 
36   // Called when the fragmenter finishes sending all requested fragments,
37   // but the packet has not been entirely sent.
38   transmit_finished_cb transmit_finished;
39 } packet_fragmenter_callbacks_t;
40 
41 typedef struct packet_fragmenter_t {
42   // Initialize the fragmenter, specifying the |result_callbacks|.
43   void (*init)(const packet_fragmenter_callbacks_t *result_callbacks);
44 
45   // Release all resources associated with the fragmenter.
46   void (*cleanup)(void);
47 
48   // Fragments |packet| if necessary and hands off everything to the fragmented callback.
49   void (*fragment_and_dispatch)(BT_HDR *packet);
50   // If |packet| is a complete packet, forwards to the reassembled callback. Otherwise
51   // holds onto it until all fragments arrive, at which point the reassembled callback is called
52   // with the reassembled data.
53   void (*reassemble_and_dispatch)(BT_HDR *packet);
54 } packet_fragmenter_t;
55 
56 const packet_fragmenter_t *packet_fragmenter_get_interface();
57 
58 const packet_fragmenter_t *packet_fragmenter_get_test_interface(
59     const controller_t *controller_interface,
60     const allocator_t *buffer_allocator_interface);
61