1 /* libusb-win32, Generic Windows USB Library
2 * Copyright (c) 2002-2005 Stephan Meyer <ste_meyer@web.de>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18
19
20 #include "libusb_driver.h"
21
22
23
get_interface(libusb_device_t * dev,int interface_number,unsigned char * altsetting,int timeout)24 NTSTATUS get_interface(libusb_device_t *dev,
25 int interface_number,
26 unsigned char *altsetting,
27 int timeout)
28 {
29 NTSTATUS status = STATUS_SUCCESS;
30 URB urb;
31 PUSB_INTERFACE_DESCRIPTOR interface_descriptor;
32
33 USBMSG("interface: %d timeout: %d\n", interface_number, timeout);
34
35 if (!dev->config.value)
36 {
37 USBERR0("invalid configuration 0\n");
38 return STATUS_INVALID_DEVICE_STATE;
39 }
40
41 memset(&urb, 0, sizeof(URB));
42
43 urb.UrbHeader.Function = URB_FUNCTION_GET_INTERFACE;
44 urb.UrbHeader.Length = sizeof(struct _URB_CONTROL_GET_INTERFACE_REQUEST);
45 urb.UrbControlGetInterfaceRequest.TransferBufferLength = 1;
46 urb.UrbControlGetInterfaceRequest.TransferBuffer = altsetting;
47 urb.UrbControlGetInterfaceRequest.Interface = (USHORT)interface_number;
48
49 status = call_usbd(dev, &urb, IOCTL_INTERNAL_USB_SUBMIT_URB, timeout);
50
51 if (!NT_SUCCESS(status) || !USBD_SUCCESS(urb.UrbHeader.Status))
52 {
53 USBERR("getting interface failed: status: 0x%x, urb-status: 0x%x\n",
54 status, urb.UrbHeader.Status);
55 }
56 else
57 {
58 USBMSG("current altsetting is %d\n", *altsetting);
59 }
60
61 return status;
62 }
63
get_interface_ex(libusb_device_t * dev,interface_request_t * interface_request,int timeout)64 NTSTATUS get_interface_ex(libusb_device_t *dev,
65 interface_request_t* interface_request,
66 int timeout)
67 {
68 unsigned char alt_number;
69 NTSTATUS status = STATUS_SUCCESS;
70
71 USB_INTERFACE_DESCRIPTOR *interface_descriptor = NULL;
72
73 USBMSG("interface-%s=%d timeout=%d\n",
74 interface_request->intf_use_index ? "index" : "number",
75 interface_request->intf_use_index ? interface_request->interface_index : interface_request->interface_number,
76 timeout);
77
78 if (!dev->config.value || !dev->config.descriptor)
79 {
80 USBERR0("device is not configured\n");
81 return STATUS_INVALID_DEVICE_STATE;
82 }
83
84 interface_request->altsetting_index=FIND_INTERFACE_INDEX_ANY;
85 interface_descriptor = find_interface_desc_ex(dev->config.descriptor,dev->config.total_size,interface_request,NULL);
86 if (!interface_descriptor)
87 {
88 return STATUS_NO_MORE_ENTRIES;
89 }
90
91 status = get_interface(dev,interface_descriptor->bInterfaceNumber, &alt_number, timeout);
92 if (!NT_SUCCESS(status))
93 {
94 return STATUS_NO_MORE_ENTRIES;
95 }
96
97 interface_request->interface_number=interface_descriptor->bInterfaceNumber;
98 interface_request->altsetting_number=alt_number;
99 interface_request->altf_use_index=0;
100 interface_request->intf_use_index=0;
101
102 interface_descriptor = find_interface_desc_ex(dev->config.descriptor,dev->config.total_size,interface_request,NULL);
103 if (!interface_descriptor)
104 {
105 return STATUS_NO_MORE_ENTRIES;
106 }
107
108 return status;
109 }
110