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/** @file
* @brief usbhid-dump - interface list
*
* Copyright (C) 2010 Nikolai Kondrashov
*
* This file is part of usbhid-dump.
*
* Usbhid-dump 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.
*
* Usbhid-dump 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 usbhid-dump; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* @author Nikolai Kondrashov <spbnick@gmail.com>
*
* @(#) $Id$
*/
#include "uhd/iface_list.h"
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
bool
uhd_iface_list_valid(const uhd_iface *list)
{
UHD_IFACE_LIST_FOR_EACH(list, list)
if (!uhd_iface_valid(list))
return false;
return true;
}
size_t
uhd_iface_list_len(const uhd_iface *list)
{
size_t len = 0;
UHD_IFACE_LIST_FOR_EACH(list, list)
len++;
return len;
}
void
uhd_iface_list_free(uhd_iface *list)
{
uhd_iface *next;
for (; list != NULL; list = next)
{
next = list->next;
uhd_iface_free(list);
}
}
enum libusb_error
uhd_iface_list_new_from_dev(libusb_device_handle *handle,
uhd_iface **plist)
{
enum libusb_error err = LIBUSB_ERROR_OTHER;
struct libusb_config_descriptor *config = NULL;
const struct libusb_interface *libusb_iface;
const struct libusb_endpoint_descriptor *ep_list;
uint8_t ep_num;
const struct libusb_endpoint_descriptor *ep;
uhd_iface *list = NULL;
uhd_iface *last = NULL;
uhd_iface *iface;
assert(handle != NULL);
/* Retrieve active configuration descriptor */
err = libusb_get_active_config_descriptor(libusb_get_device(handle),
&config);
if (err != LIBUSB_SUCCESS)
goto cleanup;
/* Build the matching interface list */
for (libusb_iface = config->interface;
libusb_iface - config->interface < config->bNumInterfaces;
libusb_iface++)
{
if (libusb_iface->num_altsetting != 1 ||
libusb_iface->altsetting->bInterfaceClass != LIBUSB_CLASS_HID)
continue;
ep_list = libusb_iface->altsetting->endpoint;
ep_num = libusb_iface->altsetting->bNumEndpoints;
for (ep = ep_list; (ep - ep_list) < ep_num; ep++)
{
if ((ep->bmAttributes & LIBUSB_TRANSFER_TYPE_MASK) !=
LIBUSB_TRANSFER_TYPE_INTERRUPT ||
(ep->bEndpointAddress & LIBUSB_ENDPOINT_DIR_MASK) !=
LIBUSB_ENDPOINT_IN)
continue;
iface = uhd_iface_new(
handle,
libusb_iface->altsetting->bInterfaceNumber,
ep->bEndpointAddress, ep->wMaxPacketSize);
if (iface == NULL)
{
err = LIBUSB_ERROR_NO_MEM;
goto cleanup;
}
if (last == NULL)
list = iface;
else
last->next = iface;
last = iface;
break;
}
}
/* Output the resulting list, if requested */
if (plist != NULL)
{
*plist = list;
list = NULL;
}
cleanup:
uhd_iface_list_free(list);
if (config != NULL)
libusb_free_config_descriptor(config);
return err;
}
uhd_iface *
uhd_iface_list_fltr_by_num(uhd_iface *list,
int number)
{
uhd_iface *prev;
uhd_iface *iface;
uhd_iface *next;
assert(uhd_iface_list_valid(list));
assert(number < UINT8_MAX);
if (number < 0)
return list;
for (prev = NULL, iface = list; iface != NULL; iface = next)
{
next = iface->next;
if (iface->number == (uint8_t)number)
prev = iface;
else
{
if (prev == NULL)
list = next;
else
prev->next = next;
free(iface);
}
}
return list;
}
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