1 /*
2  * Copyright (C) 2016 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 <sys/types.h>
20 
21 #include "adb.h"
22 #include "transport.h"
23 
24 // USB host/client interface.
25 
26 #define ADB_USB_INTERFACE(handle_ref_type)                       \
27     void usb_init();                                             \
28     void usb_cleanup();                                          \
29     int usb_write(handle_ref_type h, const void* data, int len); \
30     int usb_read(handle_ref_type h, void* data, int len);        \
31     int usb_close(handle_ref_type h);                            \
32     void usb_reset(handle_ref_type h);                           \
33     void usb_kick(handle_ref_type h);                            \
34     size_t usb_get_max_packet_size(handle_ref_type)
35 
36 // Linux and Darwin clients have native and libusb implementations.
37 
38 namespace libusb {
39 struct usb_handle;
40 ADB_USB_INTERFACE(libusb::usb_handle*);
41 }  // namespace libusb
42 
43 namespace native {
44 struct usb_handle;
45 ADB_USB_INTERFACE(native::usb_handle*);
46 }  // namespace native
47 
48 // Empty base that both implementations' opaque handles inherit from.
49 struct usb_handle {};
50 
51 ADB_USB_INTERFACE(::usb_handle*);
52 
53 // USB device detection.
54 int is_adb_interface(int usb_class, int usb_subclass, int usb_protocol);
55 
56 bool should_use_libusb();
57 
58 struct UsbConnection : public BlockingConnection {
UsbConnectionUsbConnection59     explicit UsbConnection(usb_handle* handle) : handle_(handle) {}
60     ~UsbConnection();
61 
62     bool Read(apacket* packet) override final;
63     bool Write(apacket* packet) override final;
64     bool DoTlsHandshake(RSA* key, std::string* auth_key) override final;
65 
66     void Close() override final;
67     virtual void Reset() override final;
68 
69     usb_handle* handle_;
70 };
71