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use std::marker::PhantomData;
use std::mem;
use std::slice;
use std::time::Duration;
use bit_set::BitSet;
use libc::{c_int, c_uint, c_uchar};
use libusb::*;
use context::Context;
use error::{self, Error};
use device_descriptor::DeviceDescriptor;
use config_descriptor::ConfigDescriptor;
use interface_descriptor::InterfaceDescriptor;
use fields::{Direction, RequestType, Recipient, request_type};
use language::Language;
pub struct DeviceHandle<'a> {
_context: PhantomData<&'a Context>,
handle: *mut libusb_device_handle,
interfaces: BitSet,
}
impl<'a> Drop for DeviceHandle<'a> {
fn drop(&mut self) {
unsafe {
for iface in self.interfaces.iter() {
libusb_release_interface(self.handle, iface as c_int);
}
libusb_close(self.handle);
}
}
}
unsafe impl<'a> Send for DeviceHandle<'a> {}
unsafe impl<'a> Sync for DeviceHandle<'a> {}
impl<'a> DeviceHandle<'a> {
pub fn active_configuration(&self) -> ::Result<u8> {
let mut config = unsafe { mem::uninitialized() };
try_unsafe!(libusb_get_configuration(self.handle, &mut config));
Ok(config as u8)
}
pub fn set_active_configuration(&mut self, config: u8) -> ::Result<()> {
try_unsafe!(libusb_set_configuration(self.handle, config as c_int));
Ok(())
}
pub fn unconfigure(&mut self) -> ::Result<()> {
try_unsafe!(libusb_set_configuration(self.handle, -1));
Ok(())
}
pub fn reset(&mut self) -> ::Result<()> {
try_unsafe!(libusb_reset_device(self.handle));
Ok(())
}
pub fn kernel_driver_active(&self, iface: u8) -> ::Result<bool> {
match unsafe { libusb_kernel_driver_active(self.handle, iface as c_int) } {
0 => Ok(false),
1 => Ok(true),
err => Err(error::from_libusb(err)),
}
}
pub fn detach_kernel_driver(&mut self, iface: u8) -> ::Result<()> {
try_unsafe!(libusb_detach_kernel_driver(self.handle, iface as c_int));
Ok(())
}
pub fn attach_kernel_driver(&mut self, iface: u8) -> ::Result<()> {
try_unsafe!(libusb_attach_kernel_driver(self.handle, iface as c_int));
Ok(())
}
pub fn claim_interface(&mut self, iface: u8) -> ::Result<()> {
try_unsafe!(libusb_claim_interface(self.handle, iface as c_int));
self.interfaces.insert(iface as usize);
Ok(())
}
pub fn release_interface(&mut self, iface: u8) -> ::Result<()> {
try_unsafe!(libusb_release_interface(self.handle, iface as c_int));
self.interfaces.remove(iface as usize);
Ok(())
}
pub fn set_alternate_setting(&mut self, iface: u8, setting: u8) -> ::Result<()> {
try_unsafe!(libusb_set_interface_alt_setting(self.handle, iface as c_int, setting as c_int));
Ok(())
}
pub fn read_interrupt(&self, endpoint: u8, buf: &mut [u8], timeout: Duration) -> ::Result<usize> {
if endpoint & LIBUSB_ENDPOINT_DIR_MASK != LIBUSB_ENDPOINT_IN {
return Err(Error::InvalidParam);
}
let mut transferred: c_int = unsafe { mem::uninitialized() };
let ptr = buf.as_mut_ptr() as *mut c_uchar;
let len = buf.len() as c_int;
let timeout_ms = (timeout.as_secs() * 1000 + timeout.subsec_nanos() as u64 / 1_000_000) as c_uint;
match unsafe { libusb_interrupt_transfer(self.handle, endpoint, ptr, len, &mut transferred, timeout_ms) } {
0 => {
Ok(transferred as usize)
},
err => {
if err == LIBUSB_ERROR_INTERRUPTED && transferred > 0 {
Ok(transferred as usize)
}
else {
Err(error::from_libusb(err))
}
},
}
}
pub fn write_interrupt(&self, endpoint: u8, buf: &[u8], timeout: Duration) -> ::Result<usize> {
if endpoint & LIBUSB_ENDPOINT_DIR_MASK != LIBUSB_ENDPOINT_OUT {
return Err(Error::InvalidParam);
}
let mut transferred: c_int = unsafe { mem::uninitialized() };
let ptr = buf.as_ptr() as *mut c_uchar;
let len = buf.len() as c_int;
let timeout_ms = (timeout.as_secs() * 1000 + timeout.subsec_nanos() as u64 / 1_000_000) as c_uint;
match unsafe { libusb_interrupt_transfer(self.handle, endpoint, ptr, len, &mut transferred, timeout_ms) } {
0 => {
Ok(transferred as usize)
},
err => {
if err == LIBUSB_ERROR_INTERRUPTED && transferred > 0 {
Ok(transferred as usize)
}
else {
Err(error::from_libusb(err))
}
},
}
}
pub fn read_bulk(&self, endpoint: u8, buf: &mut [u8], timeout: Duration) -> ::Result<usize> {
if endpoint & LIBUSB_ENDPOINT_DIR_MASK != LIBUSB_ENDPOINT_IN {
return Err(Error::InvalidParam);
}
let mut transferred: c_int = unsafe { mem::uninitialized() };
let ptr = buf.as_mut_ptr() as *mut c_uchar;
let len = buf.len() as c_int;
let timeout_ms = (timeout.as_secs() * 1000 + timeout.subsec_nanos() as u64 / 1_000_000) as c_uint;
match unsafe { libusb_bulk_transfer(self.handle, endpoint, ptr, len, &mut transferred, timeout_ms) } {
0 => {
Ok(transferred as usize)
},
err => {
if err == LIBUSB_ERROR_INTERRUPTED && transferred > 0 {
Ok(transferred as usize)
}
else {
Err(error::from_libusb(err))
}
},
}
}
pub fn write_bulk(&self, endpoint: u8, buf: &[u8], timeout: Duration) -> ::Result<usize> {
if endpoint & LIBUSB_ENDPOINT_DIR_MASK != LIBUSB_ENDPOINT_OUT {
return Err(Error::InvalidParam);
}
let mut transferred: c_int = unsafe { mem::uninitialized() };
let ptr = buf.as_ptr() as *mut c_uchar;
let len = buf.len() as c_int;
let timeout_ms = (timeout.as_secs() * 1000 + timeout.subsec_nanos() as u64 / 1_000_000) as c_uint;
match unsafe { libusb_bulk_transfer(self.handle, endpoint, ptr, len, &mut transferred, timeout_ms) } {
0 => {
Ok(transferred as usize)
},
err => {
if err == LIBUSB_ERROR_INTERRUPTED && transferred > 0 {
Ok(transferred as usize)
}
else {
Err(error::from_libusb(err))
}
},
}
}
pub fn read_control(&self, request_type: u8, request: u8, value: u16, index: u16, buf: &mut [u8], timeout: Duration) -> ::Result<usize> {
if request_type & LIBUSB_ENDPOINT_DIR_MASK != LIBUSB_ENDPOINT_IN {
return Err(Error::InvalidParam);
}
let ptr = buf.as_mut_ptr() as *mut c_uchar;
let len = buf.len() as u16;
let timeout_ms = (timeout.as_secs() * 1000 + timeout.subsec_nanos() as u64 / 1_000_000) as c_uint;
let res = unsafe {
libusb_control_transfer(self.handle, request_type, request, value, index, ptr, len, timeout_ms)
};
if res < 0 {
Err(error::from_libusb(res))
} else {
Ok(res as usize)
}
}
pub fn write_control(&self, request_type: u8, request: u8, value: u16, index: u16, buf: &[u8], timeout: Duration) -> ::Result<usize> {
if request_type & LIBUSB_ENDPOINT_DIR_MASK != LIBUSB_ENDPOINT_OUT {
return Err(Error::InvalidParam);
}
let ptr = buf.as_ptr() as *mut c_uchar;
let len = buf.len() as u16;
let timeout_ms = (timeout.as_secs() * 1000 + timeout.subsec_nanos() as u64 / 1_000_000) as c_uint;
let res = unsafe {
libusb_control_transfer(self.handle, request_type, request, value, index, ptr, len, timeout_ms)
};
if res < 0 {
Err(error::from_libusb(res))
} else {
Ok(res as usize)
}
}
pub fn read_languages(&self, timeout: Duration) -> ::Result<Vec<Language>> {
let mut buf = Vec::<u8>::with_capacity(256);
let mut buf_slice = unsafe {
slice::from_raw_parts_mut((&mut buf[..]).as_mut_ptr(), buf.capacity())
};
let len = try!(self.read_control(request_type(Direction::In, RequestType::Standard, Recipient::Device),
LIBUSB_REQUEST_GET_DESCRIPTOR,
(LIBUSB_DT_STRING as u16) << 8,
0,
buf_slice,
timeout));
unsafe {
buf.set_len(len);
}
Ok(buf.chunks(2).skip(1).map(|chunk| {
let lang_id = chunk[0] as u16 | (chunk[1] as u16) << 8;
::language::from_lang_id(lang_id)
}).collect())
}
pub fn read_string_descriptor(&self, language: Language, index: u8, timeout: Duration) -> ::Result<String> {
let mut buf = Vec::<u8>::with_capacity(256);
let mut buf_slice = unsafe {
slice::from_raw_parts_mut((&mut buf[..]).as_mut_ptr(), buf.capacity())
};
let len = try!(self.read_control(request_type(Direction::In, RequestType::Standard, Recipient::Device),
LIBUSB_REQUEST_GET_DESCRIPTOR,
(LIBUSB_DT_STRING as u16) << 8 | index as u16,
language.lang_id(),
buf_slice,
timeout));
unsafe {
buf.set_len(len);
}
let utf16: Vec<u16> = buf.chunks(2).skip(1).map(|chunk| {
chunk[0] as u16 | (chunk[1] as u16) << 8
}).collect();
String::from_utf16(&utf16[..]).map_err(|_| Error::Other)
}
pub fn read_manufacturer_string(&self, language: Language, device: &DeviceDescriptor, timeout: Duration) -> ::Result<String> {
match device.manufacturer_string_index() {
None => Err(Error::InvalidParam),
Some(n) => self.read_string_descriptor(language, n, timeout)
}
}
pub fn read_product_string(&self, language: Language, device: &DeviceDescriptor, timeout: Duration) -> ::Result<String> {
match device.product_string_index() {
None => Err(Error::InvalidParam),
Some(n) => self.read_string_descriptor(language, n, timeout)
}
}
pub fn read_serial_number_string(&self, language: Language, device: &DeviceDescriptor, timeout: Duration) -> ::Result<String> {
match device.serial_number_string_index() {
None => Err(Error::InvalidParam),
Some(n) => self.read_string_descriptor(language, n, timeout)
}
}
pub fn read_configuration_string(&self, language: Language, configuration: &ConfigDescriptor, timeout: Duration) -> ::Result<String> {
match configuration.description_string_index() {
None => Err(Error::InvalidParam),
Some(n) => self.read_string_descriptor(language, n, timeout)
}
}
pub fn read_interface_string(&self, language: Language, interface: &InterfaceDescriptor, timeout: Duration) -> ::Result<String> {
match interface.description_string_index() {
None => Err(Error::InvalidParam),
Some(n) => self.read_string_descriptor(language, n, timeout)
}
}
}
#[doc(hidden)]
pub unsafe fn from_libusb<'a>(context: PhantomData<&'a Context>, handle: *mut libusb_device_handle) -> DeviceHandle<'a> {
DeviceHandle {
_context: context,
handle: handle,
interfaces: BitSet::with_capacity(u8::max_value() as usize + 1),
}
}