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Protect against NULL device in the Android hidapi implementation

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This commit is contained in:
Sam Lantinga 2019-06-07 09:00:26 -07:00
parent 9261e473d6
commit 23a2b47790
1 changed files with 65 additions and 42 deletions
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107
src/hidapi/android/hid.cpp
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@ -1027,11 +1027,14 @@ HID_API_EXPORT hid_device * HID_API_CALL hid_open_path(const char *path, int bEx
int HID_API_EXPORT HID_API_CALL hid_write(hid_device *device, const unsigned char *data, size_t length) int HID_API_EXPORT HID_API_CALL hid_write(hid_device *device, const unsigned char *data, size_t length)
{ {
LOGV( "hid_write id=%d length=%u", device->m_nId, length ); if ( device )
hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId );
if ( pDevice )
{ {
return pDevice->SendOutputReport( data, length ); LOGV( "hid_write id=%d length=%u", device->m_nId, length );
hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId );
if ( pDevice )
{
return pDevice->SendOutputReport( data, length );
}
} }
return -1; // Controller was disconnected return -1; // Controller was disconnected
} }
@ -1039,13 +1042,16 @@ int HID_API_EXPORT HID_API_CALL hid_write(hid_device *device, const unsigned ch
// TODO: Implement timeout? // TODO: Implement timeout?
int HID_API_EXPORT HID_API_CALL hid_read_timeout(hid_device *device, unsigned char *data, size_t length, int milliseconds) int HID_API_EXPORT HID_API_CALL hid_read_timeout(hid_device *device, unsigned char *data, size_t length, int milliseconds)
{ {
// LOGV( "hid_read_timeout id=%d length=%u timeout=%d", device->m_nId, length, milliseconds ); if ( device )
hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId );
if ( pDevice )
{ {
return pDevice->GetInput( data, length ); // LOGV( "hid_read_timeout id=%d length=%u timeout=%d", device->m_nId, length, milliseconds );
hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId );
if ( pDevice )
{
return pDevice->GetInput( data, length );
}
LOGV( "controller was disconnected" );
} }
LOGV( "controller was disconnected" );
return -1; // Controller was disconnected return -1; // Controller was disconnected
} }
@ -1064,11 +1070,14 @@ int HID_API_EXPORT HID_API_CALL hid_set_nonblocking(hid_device *device, int non
int HID_API_EXPORT HID_API_CALL hid_send_feature_report(hid_device *device, const unsigned char *data, size_t length) int HID_API_EXPORT HID_API_CALL hid_send_feature_report(hid_device *device, const unsigned char *data, size_t length)
{ {
LOGV( "hid_send_feature_report id=%d length=%u", device->m_nId, length ); if ( device )
hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId );
if ( pDevice )
{ {
return pDevice->SendFeatureReport( data, length ); LOGV( "hid_send_feature_report id=%d length=%u", device->m_nId, length );
hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId );
if ( pDevice )
{
return pDevice->SendFeatureReport( data, length );
}
} }
return -1; // Controller was disconnected return -1; // Controller was disconnected
} }
@ -1077,11 +1086,14 @@ int HID_API_EXPORT HID_API_CALL hid_send_feature_report(hid_device *device, cons
// Synchronous operation. Will block until completed. // Synchronous operation. Will block until completed.
int HID_API_EXPORT HID_API_CALL hid_get_feature_report(hid_device *device, unsigned char *data, size_t length) int HID_API_EXPORT HID_API_CALL hid_get_feature_report(hid_device *device, unsigned char *data, size_t length)
{ {
LOGV( "hid_get_feature_report id=%d length=%u", device->m_nId, length ); if ( device )
hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId );
if ( pDevice )
{ {
return pDevice->GetFeatureReport( data, length ); LOGV( "hid_get_feature_report id=%d length=%u", device->m_nId, length );
hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId );
if ( pDevice )
{
return pDevice->GetFeatureReport( data, length );
}
} }
return -1; // Controller was disconnected return -1; // Controller was disconnected
} }
@ -1089,54 +1101,65 @@ int HID_API_EXPORT HID_API_CALL hid_get_feature_report(hid_device *device, unsig
void HID_API_EXPORT HID_API_CALL hid_close(hid_device *device) void HID_API_EXPORT HID_API_CALL hid_close(hid_device *device)
{ {
LOGV( "hid_close id=%d", device->m_nId ); if ( device )
hid_mutex_guard r( &g_DevicesRefCountMutex );
LOGD("Decrementing device %d (%p), refCount = %d\n", device->m_nId, device, device->m_nDeviceRefCount - 1);
if ( --device->m_nDeviceRefCount == 0 )
{ {
hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId ); LOGV( "hid_close id=%d", device->m_nId );
if ( pDevice ) hid_mutex_guard r( &g_DevicesRefCountMutex );
LOGD("Decrementing device %d (%p), refCount = %d\n", device->m_nId, device, device->m_nDeviceRefCount - 1);
if ( --device->m_nDeviceRefCount == 0 )
{ {
pDevice->Close( true ); hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId );
if ( pDevice )
{
pDevice->Close( true );
}
else
{
delete device;
}
LOGD("Deleted device %p\n", device);
} }
else
{
delete device;
}
LOGD("Deleted device %p\n", device);
} }
} }
int HID_API_EXPORT_CALL hid_get_manufacturer_string(hid_device *device, wchar_t *string, size_t maxlen) int HID_API_EXPORT_CALL hid_get_manufacturer_string(hid_device *device, wchar_t *string, size_t maxlen)
{ {
hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId ); if ( device )
if ( pDevice )
{ {
wcsncpy( string, pDevice->GetDeviceInfo()->manufacturer_string, maxlen ); hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId );
return 0; if ( pDevice )
{
wcsncpy( string, pDevice->GetDeviceInfo()->manufacturer_string, maxlen );
return 0;
}
} }
return -1; return -1;
} }
int HID_API_EXPORT_CALL hid_get_product_string(hid_device *device, wchar_t *string, size_t maxlen) int HID_API_EXPORT_CALL hid_get_product_string(hid_device *device, wchar_t *string, size_t maxlen)
{ {
hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId ); if ( device )
if ( pDevice )
{ {
wcsncpy( string, pDevice->GetDeviceInfo()->product_string, maxlen ); hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId );
return 0; if ( pDevice )
{
wcsncpy( string, pDevice->GetDeviceInfo()->product_string, maxlen );
return 0;
}
} }
return -1; return -1;
} }
int HID_API_EXPORT_CALL hid_get_serial_number_string(hid_device *device, wchar_t *string, size_t maxlen) int HID_API_EXPORT_CALL hid_get_serial_number_string(hid_device *device, wchar_t *string, size_t maxlen)
{ {
hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId ); if ( device )
if ( pDevice )
{ {
wcsncpy( string, pDevice->GetDeviceInfo()->serial_number, maxlen ); hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId );
return 0; if ( pDevice )
{
wcsncpy( string, pDevice->GetDeviceInfo()->serial_number, maxlen );
return 0;
}
} }
return -1; return -1;
} }