1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
extern crate libc;
extern crate log;
use crate::transport::device_selector::DeviceSelectorEvent;
use crate::transport::platform::iokit::*;
use crate::util::io_err;
use core_foundation::base::*;
use core_foundation::runloop::*;
use runloop::RunLoop;
use std::collections::HashMap;
use std::os::raw::c_void;
use std::sync::mpsc::{channel, Receiver, Sender};
use std::{io, slice};
struct DeviceData {
tx: Sender<Vec<u8>>,
runloop: RunLoop,
}
pub struct Monitor<F>
where
F: Fn(
(IOHIDDeviceRef, Receiver<Vec<u8>>),
Sender<DeviceSelectorEvent>,
Sender<crate::StatusUpdate>,
&dyn Fn() -> bool,
) + Send
+ Sync
+ 'static,
{
manager: IOHIDManagerRef,
// Keep alive until the monitor goes away.
_matcher: IOHIDDeviceMatcher,
map: HashMap<IOHIDDeviceRef, DeviceData>,
new_device_cb: F,
selector_sender: Sender<DeviceSelectorEvent>,
status_sender: Sender<crate::StatusUpdate>,
}
impl<F> Monitor<F>
where
F: Fn(
(IOHIDDeviceRef, Receiver<Vec<u8>>),
Sender<DeviceSelectorEvent>,
Sender<crate::StatusUpdate>,
&dyn Fn() -> bool,
) + Send
+ Sync
+ 'static,
{
pub fn new(
new_device_cb: F,
selector_sender: Sender<DeviceSelectorEvent>,
status_sender: Sender<crate::StatusUpdate>,
) -> Self {
let manager = unsafe { IOHIDManagerCreate(kCFAllocatorDefault, kIOHIDManagerOptionNone) };
// Match FIDO devices only.
let _matcher = IOHIDDeviceMatcher::new();
unsafe { IOHIDManagerSetDeviceMatching(manager, _matcher.dict.as_concrete_TypeRef()) };
Self {
manager,
_matcher,
new_device_cb,
map: HashMap::new(),
selector_sender,
status_sender,
}
}
pub fn start(&mut self) -> io::Result<()> {
let context = self as *mut Self as *mut c_void;
unsafe {
IOHIDManagerRegisterDeviceMatchingCallback(
self.manager,
Monitor::<F>::on_device_matching,
context,
);
IOHIDManagerRegisterDeviceRemovalCallback(
self.manager,
Monitor::<F>::on_device_removal,
context,
);
IOHIDManagerRegisterInputReportCallback(
self.manager,
Monitor::<F>::on_input_report,
context,
);
IOHIDManagerScheduleWithRunLoop(
self.manager,
CFRunLoopGetCurrent(),
kCFRunLoopDefaultMode,
);
let rv = IOHIDManagerOpen(self.manager, kIOHIDManagerOptionNone);
if rv == 0 {
Ok(())
} else {
Err(io_err(&format!("Couldn't open HID Manager, rv={rv}")))
}
}
}
pub fn stop(&mut self) {
// Remove all devices.
while !self.map.is_empty() {
let device_ref = *self.map.keys().next().unwrap();
self.remove_device(device_ref);
}
// Close the manager and its devices.
unsafe { IOHIDManagerClose(self.manager, kIOHIDManagerOptionNone) };
}
fn remove_device(&mut self, device_ref: IOHIDDeviceRef) {
if let Some(DeviceData { tx, runloop }) = self.map.remove(&device_ref) {
let _ = self
.selector_sender
.send(DeviceSelectorEvent::DeviceRemoved(device_ref));
// Dropping `tx` will make Device::read() fail eventually.
drop(tx);
// Wait until the runloop stopped.
runloop.cancel();
}
}
extern "C" fn on_input_report(
context: *mut c_void,
_: IOReturn,
device_ref: IOHIDDeviceRef,
_: IOHIDReportType,
_: u32,
report: *mut u8,
report_len: CFIndex,
) {
let this = unsafe { &mut *(context as *mut Self) };
let mut send_failed = false;
// Ignore the report if we can't find a device for it.
if let Some(DeviceData { tx, .. }) = this.map.get(&device_ref) {
let data = unsafe { slice::from_raw_parts(report, report_len as usize).to_vec() };
send_failed = tx.send(data).is_err();
}
// Remove the device if sending fails.
if send_failed {
this.remove_device(device_ref);
}
}
extern "C" fn on_device_matching(
context: *mut c_void,
_: IOReturn,
_: *mut c_void,
device_ref: IOHIDDeviceRef,
) {
let this = unsafe { &mut *(context as *mut Self) };
let _ = this
.selector_sender
.send(DeviceSelectorEvent::DevicesAdded(vec![device_ref]));
let selector_sender = this.selector_sender.clone();
let status_sender = this.status_sender.clone();
let (tx, rx) = channel();
let f = &this.new_device_cb;
// Create a new per-device runloop.
let runloop = RunLoop::new(move |alive| {
// Ensure that the runloop is still alive.
if alive() {
f((device_ref, rx), selector_sender, status_sender, alive);
}
});
if let Ok(runloop) = runloop {
this.map.insert(device_ref, DeviceData { tx, runloop });
}
}
extern "C" fn on_device_removal(
context: *mut c_void,
_: IOReturn,
_: *mut c_void,
device_ref: IOHIDDeviceRef,
) {
let this = unsafe { &mut *(context as *mut Self) };
this.remove_device(device_ref);
}
}
impl<F> Drop for Monitor<F>
where
F: Fn(
(IOHIDDeviceRef, Receiver<Vec<u8>>),
Sender<DeviceSelectorEvent>,
Sender<crate::StatusUpdate>,
&dyn Fn() -> bool,
) + Send
+ Sync
+ 'static,
{
fn drop(&mut self) {
unsafe { CFRelease(self.manager as *mut c_void) };
}
}
|
