diff options
Diffstat (limited to 'lib/iface_list.c')
| -rw-r--r-- | lib/iface_list.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/lib/iface_list.c b/lib/iface_list.c new file mode 100644 index 0000000..9a0c862 --- /dev/null +++ b/lib/iface_list.c @@ -0,0 +1,181 @@ +/** @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) +{ + for (; list != NULL; list = list->next) + if (!uhd_iface_valid(list)) + return false; + + return true; +} + + +size_t +uhd_iface_list_len(const uhd_iface *list) +{ + size_t len = 0; + + for (; list != NULL; list = list->next) + 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; +} + + |