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/* * Copyright (C) Internet Systems Consortium, Inc. ("ISC") * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. * * See the COPYRIGHT file distributed with this work for additional * information regarding copyright ownership. / #ifndef ISC_INTERFACEITER_H #define ISC_INTERFACEITER_H 1 /** * Module Info **/ /! \file isc/interfaceiter.h * \brief Iterates over the list of network interfaces. * * Interfaces whose address family is not supported are ignored and never * returned by the iterator. Interfaces whose netmask, interface flags, * or similar cannot be obtained are also ignored, and the failure is logged. * * Standards: * The API for scanning varies greatly among operating systems. * This module attempts to hide the differences. / / * Imports **/ #include <isc/lang.h> #include <isc/netaddr.h> #include <isc/types.h> /! * \brief Public structure describing a network interface. / struct isc_interface { char name[32]; /%< Interface name, null-terminated. / unsigned int af; /%< Address family. / isc_netaddr_t address; /%< Local address. / isc_netaddr_t netmask; /%< Network mask. / isc_netaddr_t dstaddress; /%< Destination address (point-to-point only). / isc_uint32_t flags; /%< Flags; see INTERFACE flags. / }; /@{/ /! Interface flags. / #define INTERFACE_F_UP 0x00000001U #define INTERFACE_F_POINTTOPOINT 0x00000002U #define INTERFACE_F_LOOPBACK 0x00000004U /@}/ / * Functions **/ ISC_LANG_BEGINDECLS isc_result_t isc_interfaceiter_create(isc_mem_t mctx, isc_interfaceiter_t *iterp); /!< * \brief Create an iterator for traversing the operating system's list * of network interfaces. * * Returns: \li #ISC_R_SUCCESS \li #ISC_R_NOMEMORY \li Various network-related errors / isc_result_t isc_interfaceiter_first(isc_interfaceiter_t iter); /!< * \brief Position the iterator on the first interface. * * Returns: \li #ISC_R_SUCCESS Success. \li #ISC_R_NOMORE There are no interfaces. / isc_result_t isc_interfaceiter_current(isc_interfaceiter_t iter, isc_interface_t ifdata); /!< * \brief Get information about the interface the iterator is currently * positioned at and store it at ifdata. * Requires: \li The iterator has been successfully positioned using isc_interface_iter_first() / isc_interface_iter_next(). * * Returns: \li #ISC_R_SUCCESS Success. / isc_result_t isc_interfaceiter_next(isc_interfaceiter_t iter); /!< * \brief Position the iterator on the next interface. * * Requires: * \li The iterator has been successfully positioned using * isc_interface_iter_first() / isc_interface_iter_next(). * * Returns: \li #ISC_R_SUCCESS Success. \li #ISC_R_NOMORE There are no more interfaces. / void isc_interfaceiter_destroy(isc_interfaceiter_t iterp); /!< * \brief Destroy the iterator. / ISC_LANG_ENDDECLS #endif / ISC_INTERFACEITER_H */

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