1 /*
2  * Copyright 2021 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #pragma once
18 
19 #include "stack/include/bt_types.h"
20 #include "stack/include/hcidefs.h"
21 
22 /**
23  * Create a bitmask of packet types from the remote feature
24  */
25 class PeerPacketTypes {
26  public:
27   struct {
28     uint16_t supported{0};
29     uint16_t unsupported{0};
30   } acl, sco;
31 
PeerPacketTypes(const BD_FEATURES & features)32   PeerPacketTypes(const BD_FEATURES& features) {
33     /* 3 and 5 slot packets? */
34     if (HCI_3_SLOT_PACKETS_SUPPORTED(features))
35       acl.supported |= (HCI_PKT_TYPES_MASK_DH3 | HCI_PKT_TYPES_MASK_DM3);
36 
37     if (HCI_5_SLOT_PACKETS_SUPPORTED(features))
38       acl.supported |= HCI_PKT_TYPES_MASK_DH5 | HCI_PKT_TYPES_MASK_DM5;
39 
40     /* 2 and 3 MPS support? */
41     if (!HCI_EDR_ACL_2MPS_SUPPORTED(features))
42       /* Not supported. Add 'not_supported' mask for all 2MPS packet types */
43       acl.unsupported |=
44           (HCI_PKT_TYPES_MASK_NO_2_DH1 | HCI_PKT_TYPES_MASK_NO_2_DH3 |
45            HCI_PKT_TYPES_MASK_NO_2_DH5);
46 
47     if (!HCI_EDR_ACL_3MPS_SUPPORTED(features))
48       /* Not supported. Add 'not_supported' mask for all 3MPS packet types */
49       acl.unsupported |=
50           (HCI_PKT_TYPES_MASK_NO_3_DH1 | HCI_PKT_TYPES_MASK_NO_3_DH3 |
51            HCI_PKT_TYPES_MASK_NO_3_DH5);
52 
53     /* EDR 3 and 5 slot support? */
54     if (HCI_EDR_ACL_2MPS_SUPPORTED(features) ||
55         HCI_EDR_ACL_3MPS_SUPPORTED(features)) {
56       if (!HCI_3_SLOT_EDR_ACL_SUPPORTED(features))
57         /* Not supported. Add 'not_supported' mask for all 3-slot EDR packet
58          * types
59          */
60         acl.unsupported |=
61             (HCI_PKT_TYPES_MASK_NO_2_DH3 | HCI_PKT_TYPES_MASK_NO_3_DH3);
62 
63       if (!HCI_5_SLOT_EDR_ACL_SUPPORTED(features))
64         /* Not supported. Add 'not_supported' mask for all 5-slot EDR packet
65          * types
66          */
67         acl.unsupported |=
68             (HCI_PKT_TYPES_MASK_NO_2_DH5 | HCI_PKT_TYPES_MASK_NO_3_DH5);
69     }
70   }
71 };
72