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Annotation of embedaddon/dhcp/includes/inet.h, revision 1.1

1.1     ! misho       1: /* inet.h
        !             2: 
        !             3:    Portable definitions for internet addresses */
        !             4: 
        !             5: /*
        !             6:  * Copyright (c) 2004,2007,2009 by Internet Systems Consortium, Inc. ("ISC")
        !             7:  * Copyright (c) 1996-2003 by Internet Software Consortium
        !             8:  *
        !             9:  * Permission to use, copy, modify, and distribute this software for any
        !            10:  * purpose with or without fee is hereby granted, provided that the above
        !            11:  * copyright notice and this permission notice appear in all copies.
        !            12:  *
        !            13:  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
        !            14:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
        !            15:  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
        !            16:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
        !            17:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
        !            18:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
        !            19:  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            20:  *
        !            21:  *   Internet Systems Consortium, Inc.
        !            22:  *   950 Charter Street
        !            23:  *   Redwood City, CA 94063
        !            24:  *   <info@isc.org>
        !            25:  *   https://www.isc.org/
        !            26:  *
        !            27:  * This software has been written for Internet Systems Consortium
        !            28:  * by Ted Lemon in cooperation with Vixie Enterprises and Nominum, Inc.
        !            29:  * To learn more about Internet Systems Consortium, see
        !            30:  * ``https://www.isc.org/''.  To learn more about Vixie Enterprises,
        !            31:  * see ``http://www.vix.com''.   To learn more about Nominum, Inc., see
        !            32:  * ``http://www.nominum.com''.
        !            33:  */
        !            34: 
        !            35: /* An internet address of up to 128 bits. */
        !            36: 
        !            37: struct iaddr {
        !            38:        unsigned len;
        !            39:        unsigned char iabuf [16];
        !            40: };
        !            41: 
        !            42: struct iaddrlist {
        !            43:        struct iaddrlist *next;
        !            44:        struct iaddr addr;
        !            45: };
        !            46: 
        !            47: 
        !            48: /* struct iaddrmatch - used to compare a host IP against a subnet spec
        !            49:  *
        !            50:  * There is a space/speed tradeoff here implied by the use of a second
        !            51:  * struct iaddr to hold the mask; while using an unsigned (byte!) to
        !            52:  * represent the subnet prefix length would be more memory efficient,
        !            53:  * it makes run-time mask comparisons more expensive.  Since such
        !            54:  * entries are used currently only in restricted circumstances
        !            55:  * (wanting to reject a subnet), the decision is in favour of run-time
        !            56:  * efficiency.
        !            57:  */
        !            58: 
        !            59: struct iaddrmatch {
        !            60:        struct iaddr addr;
        !            61:        struct iaddr mask;
        !            62: };
        !            63: 
        !            64: /* its list ... */
        !            65:  
        !            66: struct iaddrmatchlist {
        !            67:        struct iaddrmatchlist *next;
        !            68:        struct iaddrmatch match;
        !            69: };
        !            70: 
        !            71: 
        !            72: /*
        !            73:  * Structure to store information about a CIDR network.
        !            74:  */
        !            75: 
        !            76: struct iaddrcidrnet {
        !            77:        struct iaddr lo_addr;
        !            78:        int bits;
        !            79: };
        !            80: 
        !            81: struct iaddrcidrnetlist {
        !            82:        struct iaddrcidrnetlist *next;
        !            83:        struct iaddrcidrnet cidrnet;
        !            84: };
        !            85: