1 /******************************************************************************
2  *
3  *  Copyright 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 "bt_types.h"
22 #include "hci_layer.h"
23 #include "osi/include/allocator.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,
28                                      bool send_transmit_finished);
29 
30 typedef struct {
31   // Called for every packet fragment.
32   packet_fragmented_cb fragmented;
33 
34   // Called for every completely reassembled packet.
35   packet_reassembled_cb reassembled;
36 
37   // Called when the fragmenter finishes sending all requested fragments,
38   // but the packet has not been entirely sent.
39   transmit_finished_cb transmit_finished;
40 } packet_fragmenter_callbacks_t;
41 
42 typedef struct packet_fragmenter_t {
43   // Initialize the fragmenter, specifying the |result_callbacks|.
44   void (*init)(const packet_fragmenter_callbacks_t* result_callbacks);
45 
46   // Release all resources associated with the fragmenter.
47   void (*cleanup)(void);
48 
49   // Fragments |packet| if necessary and hands off everything to the fragmented
50   // callback.
51   void (*fragment_and_dispatch)(BT_HDR* packet);
52   // If |packet| is a complete packet, forwards to the reassembled callback.
53   // Otherwise
54   // holds onto it until all fragments arrive, at which point the reassembled
55   // callback is called
56   // with the reassembled data.
57   void (*reassemble_and_dispatch)(BT_HDR* packet);
58 } packet_fragmenter_t;
59 
60 const packet_fragmenter_t* packet_fragmenter_get_interface();
61 
62 const packet_fragmenter_t* packet_fragmenter_get_test_interface(
63     const controller_t* controller_interface,
64     const allocator_t* buffer_allocator_interface);
65