diff options
Diffstat (limited to 'libusb/os/driver/get_interface.c')
-rw-r--r-- | libusb/os/driver/get_interface.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/libusb/os/driver/get_interface.c b/libusb/os/driver/get_interface.c new file mode 100644 index 0000000..de0baeb --- /dev/null +++ b/libusb/os/driver/get_interface.c @@ -0,0 +1,67 @@ +/* LIBUSB-WIN32, Generic Windows USB Library + * Copyright (c) 2002-2005 Stephan Meyer <ste_meyer@web.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + + +#include "libusb_driver.h" + + + +NTSTATUS get_interface(libusb_device_t *dev, + int interface, unsigned char *altsetting, + int *ret, int timeout) +{ + NTSTATUS status = STATUS_SUCCESS; + URB urb; + + DEBUG_PRINT_NL(); + DEBUG_MESSAGE("get_interface(): interface %d", interface); + DEBUG_MESSAGE("get_interface(): timeout %d", timeout); + + if(!dev->config.value) + { + DEBUG_ERROR("get_interface(): invalid configuration 0"); + return STATUS_INVALID_DEVICE_STATE; + } + + memset(&urb, 0, sizeof(URB)); + + urb.UrbHeader.Function = URB_FUNCTION_GET_INTERFACE; + urb.UrbHeader.Length = sizeof(struct _URB_CONTROL_GET_INTERFACE_REQUEST); + urb.UrbControlGetInterfaceRequest.TransferBufferLength = 1; + urb.UrbControlGetInterfaceRequest.TransferBuffer = altsetting; + urb.UrbControlGetInterfaceRequest.Interface = (USHORT)interface; + + status = call_usbd(dev, &urb, IOCTL_INTERNAL_USB_SUBMIT_URB, timeout); + + if(!NT_SUCCESS(status) || !USBD_SUCCESS(urb.UrbHeader.Status)) + { + DEBUG_ERROR("get_interface(): getting interface " + "failed: status: 0x%x, urb-status: 0x%x", + status, urb.UrbHeader.Status); + *ret = 0; + } + else + { + *ret = urb.UrbControlGetInterfaceRequest.TransferBufferLength; + DEBUG_MESSAGE("get_interface(): current altsetting is %d", *altsetting); + } + + return status; +} + + |