diff options
Diffstat (limited to 'lib/iface.c')
| -rw-r--r-- | lib/iface.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/lib/iface.c b/lib/iface.c new file mode 100644 index 0000000..4589c4a --- /dev/null +++ b/lib/iface.c @@ -0,0 +1,164 @@ +/** @file + * @brief hid-dump - interface + * + * Copyright (C) 2010 Nikolai Kondrashov + * + * This file is part of hid-dump. + * + * Hid-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. + * + * Hid-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 hid-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 "hid_dump/iface.h" +#include <assert.h> +#include <stdlib.h> +#include <stdio.h> + +hid_dump_iface * +hid_dump_iface_new(uint8_t number) +{ + hid_dump_iface *iface; + + iface = malloc(sizeof(*iface)); + if (iface == NULL) + return NULL; + + iface->next = NULL; + iface->number = number; + iface->detached = false; + + return iface; +} + + +bool +hid_dump_iface_list_valid(const hid_dump_iface *list) +{ + for (; list != NULL; list = list->next) + if (!hid_dump_iface_valid(list)) + return false; + + return true; +} + + +void +hid_dump_iface_list_free(hid_dump_iface *list) +{ + hid_dump_iface *next; + + for (; list != NULL; list = next) + { + next = list->next; + free(list); + } +} + + +enum libusb_error +hid_dump_iface_list_new_by_class(libusb_device *dev, + uint8_t iface_class, + hid_dump_iface **plist) +{ + enum libusb_error err = LIBUSB_ERROR_OTHER; + struct libusb_config_descriptor *config = NULL; + const struct libusb_interface *libusb_iface; + hid_dump_iface *list = NULL; + hid_dump_iface *last = NULL; + hid_dump_iface *iface; + + assert(dev != NULL); + + /* Retrieve active configuration descriptor */ + err = libusb_get_active_config_descriptor(dev, &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 == iface_class) + { + fprintf(stderr, "%d\n", + libusb_iface->altsetting->bInterfaceNumber); + + iface = hid_dump_iface_new(libusb_iface->altsetting->bInterfaceNumber); + if (iface == NULL) + { + err = LIBUSB_ERROR_NO_MEM; + goto cleanup; + } + + if (last == NULL) + list = iface; + else + last->next = iface; + last = iface; + } + + /* Output the resulting list, if requested */ + if (plist != NULL) + { + *plist = list; + list = NULL; + } + +cleanup: + + hid_dump_iface_list_free(list); + + if (config != NULL) + libusb_free_config_descriptor(config); + + return err; +} + + +hid_dump_iface * +hid_dump_iface_list_fltr_by_num(hid_dump_iface *list, + int number) +{ + hid_dump_iface *prev; + hid_dump_iface *iface; + hid_dump_iface *next; + + assert(hid_dump_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; +} |