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/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <windows.h>
#include <winerror.h>
#include <errno.h>
#include <usb100.h>
#include <adb_api.h>
#include <stdio.h>
#include "sysdeps.h"
#define TRACE_TAG TRACE_USB
#include "adb.h"
/** Structure usb_handle describes our connection to the usb device via
AdbWinApi.dll. This structure is returned from usb_open() routine and
is expected in each subsequent call that is accessing the device.
*/
struct usb_handle {
/// Previous entry in the list of opened usb handles
usb_handle *prev;
/// Next entry in the list of opened usb handles
usb_handle *next;
/// Handle to USB interface
ADBAPIHANDLE adb_interface;
/// Handle to USB read pipe (endpoint)
ADBAPIHANDLE adb_read_pipe;
/// Handle to USB write pipe (endpoint)
ADBAPIHANDLE adb_write_pipe;
/// Interface name
char* interface_name;
/// Mask for determining when to use zero length packets
unsigned zero_mask;
};
/// Class ID assigned to the device by androidusb.sys
static const GUID usb_class_id = ANDROID_USB_CLASS_ID;
/// List of opened usb handles
static usb_handle handle_list = {
.prev = &handle_list,
.next = &handle_list,
};
/// Locker for the list of opened usb handles
ADB_MUTEX_DEFINE( usb_lock );
/// Checks if there is opened usb handle in handle_list for this device.
int known_device(const char* dev_name);
/// Checks if there is opened usb handle in handle_list for this device.
/// usb_lock mutex must be held before calling this routine.
int known_device_locked(const char* dev_name);
/// Registers opened usb handle (adds it to handle_list).
int register_new_device(usb_handle* handle);
/// Checks if interface (device) matches certain criteria
int recognized_device(usb_handle* handle);
/// Enumerates present and available interfaces (devices), opens new ones and
/// registers usb transport for them.
void find_devices();
/// Entry point for thread that polls (every second) for new usb interfaces.
/// This routine calls find_devices in infinite loop.
void* device_poll_thread(void* unused);
/// Initializes this module
void usb_init();
/// Cleans up this module
void usb_cleanup();
/// Opens usb interface (device) by interface (device) name.
usb_handle* do_usb_open(const wchar_t* interface_name);
/// Writes data to the opened usb handle
int usb_write(usb_handle* handle, const void* data, int len);
/// Reads data using the opened usb handle
int usb_read(usb_handle *handle, void* data, int len);
/// Cleans up opened usb handle
void usb_cleanup_handle(usb_handle* handle);
/// Cleans up (but don't close) opened usb handle
void usb_kick(usb_handle* handle);
/// Closes opened usb handle
int usb_close(usb_handle* handle);
/// Gets interface (device) name for an opened usb handle
const char *usb_name(usb_handle* handle);
int known_device_locked(const char* dev_name) {
usb_handle* usb;
if (NULL != dev_name) {
// Iterate through the list looking for the name match.
for(usb = handle_list.next; usb != &handle_list; usb = usb->next) {
// In Windows names are not case sensetive!
if((NULL != usb->interface_name) &&
(0 == stricmp(usb->interface_name, dev_name))) {
return 1;
}
}
}
return 0;
}
int known_device(const char* dev_name) {
int ret = 0;
if (NULL != dev_name) {
adb_mutex_lock(&usb_lock);
ret = known_device_locked(dev_name);
adb_mutex_unlock(&usb_lock);
}
return ret;
}
int register_new_device(usb_handle* handle) {
if (NULL == handle)
return 0;
adb_mutex_lock(&usb_lock);
// Check if device is already in the list
if (known_device_locked(handle->interface_name)) {
adb_mutex_unlock(&usb_lock);
return 0;
}
// Not in the list. Add this handle to the list.
handle->next = &handle_list;
handle->prev = handle_list.prev;
handle->prev->next = handle;
handle->next->prev = handle;
adb_mutex_unlock(&usb_lock);
return 1;
}
void* device_poll_thread(void* unused) {
D("Created device thread\n");
while(1) {
find_devices();
adb_sleep_ms(1000);
}
return NULL;
}
void usb_init() {
adb_thread_t tid;
if(adb_thread_create(&tid, device_poll_thread, NULL)) {
fatal_errno("cannot create input thread");
}
}
void usb_cleanup() {
}
usb_handle* do_usb_open(const wchar_t* interface_name) {
// Allocate our handle
usb_handle* ret = (usb_handle*)malloc(sizeof(usb_handle));
if (NULL == ret)
return NULL;
// Set linkers back to the handle
ret->next = ret;
ret->prev = ret;
// Create interface.
ret->adb_interface = AdbCreateInterfaceByName(interface_name);
if (NULL == ret->adb_interface) {
free(ret);
errno = GetLastError();
return NULL;
}
// Open read pipe (endpoint)
ret->adb_read_pipe =
AdbOpenDefaultBulkReadEndpoint(ret->adb_interface,
AdbOpenAccessTypeReadWrite,
AdbOpenSharingModeReadWrite);
if (NULL != ret->adb_read_pipe) {
// Open write pipe (endpoint)
ret->adb_write_pipe =
AdbOpenDefaultBulkWriteEndpoint(ret->adb_interface,
AdbOpenAccessTypeReadWrite,
AdbOpenSharingModeReadWrite);
if (NULL != ret->adb_write_pipe) {
// Save interface name
unsigned long name_len = 0;
// First get expected name length
AdbGetInterfaceName(ret->adb_interface,
NULL,
&name_len,
true);
if (0 != name_len) {
ret->interface_name = (char*)malloc(name_len);
if (NULL != ret->interface_name) {
// Now save the name
if (AdbGetInterfaceName(ret->adb_interface,
ret->interface_name,
&name_len,
true)) {
// We're done at this point
return ret;
}
} else {
SetLastError(ERROR_OUTOFMEMORY);
}
}
}
}
// Something went wrong.
int saved_errno = GetLastError();
usb_cleanup_handle(ret);
free(ret);
SetLastError(saved_errno);
return NULL;
}
int usb_write(usb_handle* handle, const void* data, int len) {
unsigned long time_out = 500 + len * 8;
unsigned long written = 0;
int ret;
D("usb_write %d\n", len);
if (NULL != handle) {
// Perform write
ret = AdbWriteEndpointSync(handle->adb_write_pipe,
(void*)data,
(unsigned long)len,
&written,
time_out);
int saved_errno = GetLastError();
if (ret) {
// Make sure that we've written what we were asked to write
D("usb_write got: %ld, expected: %d\n", written, len);
if (written == (unsigned long)len) {
if(handle->zero_mask && (len & handle->zero_mask) == 0) {
// Send a zero length packet
AdbWriteEndpointSync(handle->adb_write_pipe,
(void*)data,
0,
&written,
time_out);
}
return 0;
}
} else {
// assume ERROR_INVALID_HANDLE indicates we are disconnected
if (saved_errno == ERROR_INVALID_HANDLE)
usb_kick(handle);
}
errno = saved_errno;
} else {
D("usb_write NULL handle\n");
SetLastError(ERROR_INVALID_HANDLE);
}
D("usb_write failed: %d\n", errno);
return -1;
}
int usb_read(usb_handle *handle, void* data, int len) {
unsigned long time_out = 500 + len * 8;
unsigned long read = 0;
int ret;
D("usb_read %d\n", len);
if (NULL != handle) {
while (len > 0) {
int xfer = (len > 4096) ? 4096 : len;
ret = AdbReadEndpointSync(handle->adb_read_pipe,
(void*)data,
(unsigned long)xfer,
&read,
time_out);
int saved_errno = GetLastError();
D("usb_write got: %ld, expected: %d, errno: %d\n", read, xfer, saved_errno);
if (ret) {
data += read;
len -= read;
if (len == 0)
return 0;
} else if (saved_errno != ERROR_SEM_TIMEOUT) {
// assume ERROR_INVALID_HANDLE indicates we are disconnected
if (saved_errno == ERROR_INVALID_HANDLE)
usb_kick(handle);
break;
}
errno = saved_errno;
}
} else {
D("usb_read NULL handle\n");
SetLastError(ERROR_INVALID_HANDLE);
}
D("usb_read failed: %d\n", errno);
return -1;
}
void usb_cleanup_handle(usb_handle* handle) {
if (NULL != handle) {
if (NULL != handle->interface_name)
free(handle->interface_name);
if (NULL != handle->adb_write_pipe)
AdbCloseHandle(handle->adb_write_pipe);
if (NULL != handle->adb_read_pipe)
AdbCloseHandle(handle->adb_read_pipe);
if (NULL != handle->adb_interface)
AdbCloseHandle(handle->adb_interface);
handle->interface_name = NULL;
handle->adb_write_pipe = NULL;
handle->adb_read_pipe = NULL;
handle->adb_interface = NULL;
}
}
void usb_kick(usb_handle* handle) {
if (NULL != handle) {
adb_mutex_lock(&usb_lock);
usb_cleanup_handle(handle);
adb_mutex_unlock(&usb_lock);
} else {
SetLastError(ERROR_INVALID_HANDLE);
errno = ERROR_INVALID_HANDLE;
}
}
int usb_close(usb_handle* handle) {
D("usb_close\n");
if (NULL != handle) {
// Remove handle from the list
adb_mutex_lock(&usb_lock);
if ((handle->next != handle) && (handle->prev != handle)) {
handle->next->prev = handle->prev;
handle->prev->next = handle->next;
handle->prev = handle;
handle->next = handle;
}
adb_mutex_unlock(&usb_lock);
// Cleanup handle
usb_cleanup_handle(handle);
free(handle);
}
return 0;
}
const char *usb_name(usb_handle* handle) {
if (NULL == handle) {
SetLastError(ERROR_INVALID_HANDLE);
errno = ERROR_INVALID_HANDLE;
return NULL;
}
return (const char*)handle->interface_name;
}
int recognized_device(usb_handle* handle) {
if (NULL == handle)
return 0;
// Check vendor and product id first
USB_DEVICE_DESCRIPTOR device_desc;
if (!AdbGetUsbDeviceDescriptor(handle->adb_interface,
&device_desc)) {
return 0;
}
// Then check interface properties
USB_INTERFACE_DESCRIPTOR interf_desc;
if (!AdbGetUsbInterfaceDescriptor(handle->adb_interface,
&interf_desc)) {
return 0;
}
// Must have two endpoints
if (2 != interf_desc.bNumEndpoints) {
return 0;
}
if (is_adb_interface(device_desc.idVendor, device_desc.idProduct,
interf_desc.bInterfaceClass, interf_desc.bInterfaceSubClass, interf_desc.bInterfaceProtocol)) {
if(interf_desc.bInterfaceProtocol == 0x01) {
AdbEndpointInformation endpoint_info;
// assuming zero is a valid bulk endpoint ID
if (AdbGetEndpointInformation(handle->adb_interface, 0, &endpoint_info)) {
handle->zero_mask = endpoint_info.max_packet_size - 1;
}
}
return 1;
}
return 0;
}
void find_devices() {
usb_handle* handle = NULL;
char entry_buffer[2048];
char interf_name[2048];
AdbInterfaceInfo* next_interface = (AdbInterfaceInfo*)(&entry_buffer[0]);
unsigned long entry_buffer_size = sizeof(entry_buffer);
char* copy_name;
// Enumerate all present and active interfaces.
ADBAPIHANDLE enum_handle =
AdbEnumInterfaces(usb_class_id, true, true, true);
if (NULL == enum_handle)
return;
while (AdbNextInterface(enum_handle, next_interface, &entry_buffer_size)) {
// TODO: FIXME - temp hack converting wchar_t into char.
// It would be better to change AdbNextInterface so it will return
// interface name as single char string.
const wchar_t* wchar_name = next_interface->device_name;
for(copy_name = interf_name;
L'\0' != *wchar_name;
wchar_name++, copy_name++) {
*copy_name = (char)(*wchar_name);
}
*copy_name = '\0';
// Lets see if we already have this device in the list
if (!known_device(interf_name)) {
// This seems to be a new device. Open it!
handle = do_usb_open(next_interface->device_name);
if (NULL != handle) {
// Lets see if this interface (device) belongs to us
if (recognized_device(handle)) {
D("adding a new device %s\n", interf_name);
char serial_number[512];
unsigned long serial_number_len = sizeof(serial_number);
if (AdbGetSerialNumber(handle->adb_interface,
serial_number,
&serial_number_len,
true)) {
// Lets make sure that we don't duplicate this device
if (register_new_device(handle)) {
register_usb_transport(handle, serial_number, 1);
} else {
D("register_new_device failed for %s\n", interf_name);
usb_cleanup_handle(handle);
free(handle);
}
} else {
D("cannot get serial number\n");
usb_cleanup_handle(handle);
free(handle);
}
} else {
usb_cleanup_handle(handle);
free(handle);
}
}
}
entry_buffer_size = sizeof(entry_buffer);
}
AdbCloseHandle(enum_handle);
}