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
213
214
215
use std::fmt;
use std::slice;
use libusb::*;
use endpoint_descriptor::{self, EndpointDescriptor};
pub struct Interface<'a> {
descriptors: &'a [libusb_interface_descriptor],
}
impl<'a> Interface<'a> {
pub fn number(&self) -> u8 {
self.descriptors[0].bInterfaceNumber
}
pub fn descriptors(&self) -> InterfaceDescriptors<'a> {
InterfaceDescriptors {
iter: self.descriptors.iter(),
}
}
}
pub struct InterfaceDescriptors<'a> {
iter: slice::Iter<'a, libusb_interface_descriptor>,
}
impl<'a> Iterator for InterfaceDescriptors<'a> {
type Item = InterfaceDescriptor<'a>;
fn next(&mut self) -> Option<InterfaceDescriptor<'a>> {
self.iter.next().map(|descriptor| {
InterfaceDescriptor { descriptor: descriptor }
})
}
fn size_hint(&self) -> (usize, Option<usize>) {
self.iter.size_hint()
}
}
pub struct InterfaceDescriptor<'a> {
descriptor: &'a libusb_interface_descriptor,
}
impl<'a> InterfaceDescriptor<'a> {
pub fn interface_number(&self) -> u8 {
self.descriptor.bInterfaceNumber
}
pub fn setting_number(&self) -> u8 {
self.descriptor.bAlternateSetting
}
pub fn class_code(&self) -> u8 {
self.descriptor.bInterfaceClass
}
pub fn sub_class_code(&self) -> u8 {
self.descriptor.bInterfaceSubClass
}
pub fn protocol_code(&self) -> u8 {
self.descriptor.bInterfaceProtocol
}
pub fn description_string_index(&self) -> Option<u8> {
match self.descriptor.iInterface {
0 => None,
n => Some(n),
}
}
pub fn num_endpoints(&self) -> u8 {
self.descriptor.bNumEndpoints
}
pub fn endpoint_descriptors(&self) -> EndpointDescriptors {
let endpoints = unsafe {
slice::from_raw_parts(
self.descriptor.endpoint,
self.descriptor.bNumEndpoints as usize
)
};
EndpointDescriptors { iter: endpoints.iter() }
}
}
impl<'a> fmt::Debug for InterfaceDescriptor<'a> {
fn fmt(&self, fmt: &mut fmt::Formatter) -> Result<(), fmt::Error> {
let mut debug = fmt.debug_struct("InterfaceDescriptor");
debug.field("bLength", &self.descriptor.bLength);
debug.field("bDescriptorType", &self.descriptor.bDescriptorType);
debug.field("bInterfaceNumber", &self.descriptor.bInterfaceNumber);
debug.field("bAlternateSetting", &self.descriptor.bAlternateSetting);
debug.field("bNumEndpoints", &self.descriptor.bNumEndpoints);
debug.field("bInterfaceClass", &self.descriptor.bInterfaceClass);
debug.field("bInterfaceSubClass", &self.descriptor.bInterfaceSubClass);
debug.field("bInterfaceProtocol", &self.descriptor.bInterfaceProtocol);
debug.field("iInterface", &self.descriptor.iInterface);
debug.finish()
}
}
pub struct EndpointDescriptors<'a> {
iter: slice::Iter<'a, libusb_endpoint_descriptor>,
}
impl<'a> Iterator for EndpointDescriptors<'a> {
type Item = EndpointDescriptor<'a>;
fn next(&mut self) -> Option<EndpointDescriptor<'a>> {
self.iter.next().map(|endpoint| {
endpoint_descriptor::from_libusb(endpoint)
})
}
fn size_hint(&self) -> (usize, Option<usize>) {
self.iter.size_hint()
}
}
#[doc(hidden)]
pub unsafe fn from_libusb(interface: &libusb_interface) -> Interface {
let descriptors = slice::from_raw_parts(interface.altsetting, interface.num_altsetting as usize);
debug_assert!(descriptors.len() > 0);
Interface { descriptors: descriptors }
}
#[cfg(test)]
mod test {
#[test]
fn it_has_interface_number() {
assert_eq!(42, unsafe { super::from_libusb(&interface!(interface_descriptor!(bInterfaceNumber: 42))) }.number());
}
#[test]
fn it_has_interface_number_in_descriptor() {
assert_eq!(vec!(42), unsafe { super::from_libusb(&interface!(interface_descriptor!(bInterfaceNumber: 42))) }.descriptors().map(|setting| setting.interface_number()).collect::<Vec<_>>());
}
#[test]
fn it_has_alternate_setting_number() {
assert_eq!(vec!(42), unsafe { super::from_libusb(&interface!(interface_descriptor!(bAlternateSetting: 42))) }.descriptors().map(|setting| setting.setting_number()).collect::<Vec<_>>());
}
#[test]
fn it_has_class_code() {
assert_eq!(vec!(42), unsafe { super::from_libusb(&interface!(interface_descriptor!(bInterfaceClass: 42))) }.descriptors().map(|setting| setting.class_code()).collect::<Vec<_>>());
}
#[test]
fn it_has_sub_class_code() {
assert_eq!(vec!(42), unsafe { super::from_libusb(&interface!(interface_descriptor!(bInterfaceSubClass: 42))) }.descriptors().map(|setting| setting.sub_class_code()).collect::<Vec<_>>());
}
#[test]
fn it_has_protocol_code() {
assert_eq!(vec!(42), unsafe { super::from_libusb(&interface!(interface_descriptor!(bInterfaceProtocol: 42))) }.descriptors().map(|setting| setting.protocol_code()).collect::<Vec<_>>());
}
#[test]
fn it_has_description_string_index() {
assert_eq!(vec!(Some(42)), unsafe { super::from_libusb(&interface!(interface_descriptor!(iInterface: 42))) }.descriptors().map(|setting| setting.description_string_index()).collect::<Vec<_>>());
}
#[test]
fn it_handles_missing_description_string_index() {
assert_eq!(vec!(None), unsafe { super::from_libusb(&interface!(interface_descriptor!(iInterface: 0))) }.descriptors().map(|setting| setting.description_string_index()).collect::<Vec<_>>());
}
#[test]
fn it_has_num_endpoints() {
let endpoint1 = endpoint_descriptor!(bEndpointAddress: 0x81);
let endpoint2 = endpoint_descriptor!(bEndpointAddress: 0x01);
assert_eq!(vec!(2), unsafe { super::from_libusb(&interface!(interface_descriptor!(endpoint1, endpoint2))) }.descriptors().map(|setting| setting.num_endpoints()).collect::<Vec<_>>());
}
#[test]
fn it_has_endpoints() {
let libusb_interface = interface!(interface_descriptor!(endpoint_descriptor!(bEndpointAddress: 0x87)));
let interface = unsafe { super::from_libusb(&libusb_interface) };
let endpoint_addresses = interface.descriptors().next().unwrap().endpoint_descriptors().map(|endpoint| {
endpoint.address()
}).collect::<Vec<_>>();
assert_eq!(vec![0x87], endpoint_addresses);
}
}