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portset.h
/* * 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 https://mozilla.org/MPL/2.0/. * * See the COPYRIGHT file distributed with this work for additional * information regarding copyright ownership. */ /*! \file isc/portset.h * \brief Transport Protocol Port Manipulation Module * * This module provides simple utilities to handle a set of transport protocol * (UDP or TCP) port numbers, e.g., for creating an ACL list. An isc_portset_t * object is an opaque instance of a port set, for which the user can add or * remove a specific port or a range of consecutive ports. This object is * expected to be used as a temporary work space only, and does not protect * simultaneous access from multiple threads. Therefore it must not be stored * in a place that can be accessed from multiple threads. */ #ifndef ISC_PORTSET_H #define ISC_PORTSET_H 1 /*** *** Imports ***/ #include <stdbool.h> #include <isc/net.h> /*** *** Functions ***/ ISC_LANG_BEGINDECLS isc_result_t isc_portset_create(isc_mem_t *mctx, isc_portset_t **portsetp); /*%< * Create a port set and initialize it as an empty set. * * Requires: *\li 'mctx' to be valid. *\li 'portsetp' to be non NULL and '*portsetp' to be NULL; * * Returns: *\li #ISC_R_SUCCESS *\li #ISC_R_NOMEMORY */ void isc_portset_destroy(isc_mem_t *mctx, isc_portset_t **portsetp); /*%< * Destroy a port set. * * Requires: *\li 'mctx' to be valid and must be the same context given when the port set * was created. *\li '*portsetp' to be a valid set. */ bool isc_portset_isset(isc_portset_t *portset, in_port_t port); /*%< * Test whether the given port is stored in the portset. * * Requires: *\li 'portset' to be a valid set. * * Returns * \li #true if the port is found, false otherwise. */ unsigned int isc_portset_nports(isc_portset_t *portset); /*%< * Provides the number of ports stored in the given portset. * * Requires: *\li 'portset' to be a valid set. * * Returns * \li the number of ports stored in portset. */ void isc_portset_add(isc_portset_t *portset, in_port_t port); /*%< * Add the given port to the portset. The port may or may not be stored in * the portset. * * Requires: *\li 'portlist' to be valid. */ void isc_portset_remove(isc_portset_t *portset, in_port_t port); /*%< * Remove the given port to the portset. The port may or may not be stored in * the portset. * * Requires: *\li 'portlist' to be valid. */ void isc_portset_addrange(isc_portset_t *portset, in_port_t port_lo, in_port_t port_hi); /*%< * Add a subset of [port_lo, port_hi] (inclusive) to the portset. Ports in the * subset may or may not be stored in portset. * * Requires: *\li 'portlist' to be valid. *\li port_lo <= port_hi */ void isc_portset_removerange(isc_portset_t *portset, in_port_t port_lo, in_port_t port_hi); /*%< * Subtract a subset of [port_lo, port_hi] (inclusive) from the portset. Ports * in the subset may or may not be stored in portset. * * Requires: *\li 'portlist' to be valid. *\li port_lo <= port_hi */ ISC_LANG_ENDDECLS #endif /* ISC_PORTSET_H */
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