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80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/* inet.h
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Portable definitions for internet addresses */
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/*
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* Copyright (c) 2004,2007,2009,2014 by Internet Systems Consortium, Inc. ("ISC")
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* Copyright (c) 1996-2003 by Internet Software Consortium
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Internet Systems Consortium, Inc.
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* 950 Charter Street
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* Redwood City, CA 94063
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* <info@isc.org>
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* https://www.isc.org/
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*
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*/
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/* An internet address of up to 128 bits. */
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struct iaddr {
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unsigned len;
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unsigned char iabuf [16];
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};
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struct iaddrlist {
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struct iaddrlist *next;
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struct iaddr addr;
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};
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/* struct iaddrmatch - used to compare a host IP against a subnet spec
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*
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* There is a space/speed tradeoff here implied by the use of a second
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* struct iaddr to hold the mask; while using an unsigned (byte!) to
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* represent the subnet prefix length would be more memory efficient,
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* it makes run-time mask comparisons more expensive. Since such
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* entries are used currently only in restricted circumstances
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* (wanting to reject a subnet), the decision is in favour of run-time
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* efficiency.
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*/
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struct iaddrmatch {
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struct iaddr addr;
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struct iaddr mask;
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};
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/* its list ... */
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struct iaddrmatchlist {
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struct iaddrmatchlist *next;
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struct iaddrmatch match;
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};
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/*
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* Structure to store information about a CIDR network.
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*/
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struct iaddrcidrnet {
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struct iaddr lo_addr;
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int bits;
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};
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struct iaddrcidrnetlist {
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struct iaddrcidrnetlist *next;
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struct iaddrcidrnet cidrnet;
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};
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