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63 lines
2.2 KiB
C
63 lines
2.2 KiB
C
/*
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* Copyright (c) 2007-2012, Vsevolod Stakhov
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* All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer. Redistributions in binary form
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* must reproduce the above copyright notice, this list of conditions and the
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* following disclaimer in the documentation and/or other materials provided with
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* the distribution. Neither the name of the author nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef AWL_H
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#define AWL_H
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#include "config.h"
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#define NEST_NUMBER 2048 / sizeof (uintptr_t)
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typedef struct awl_item_s {
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uint32_t ip;
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time_t last;
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uint16_t hits;
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struct awl_item_s *prev;
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struct awl_item_s *next;
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} awl_item_t;
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typedef struct awl_hash_s {
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awl_item_t * nests[NEST_NUMBER];
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u_char *pool;
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size_t poolsize;
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size_t free[NEST_NUMBER];
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/* Number of hits to whitelist */
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int white_hits;
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/* Live time of record */
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int ttl;
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#ifdef _THREAD_SAFE
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pthread_mutex_t locks[NEST_NUMBER];
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#endif
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} awl_hash_t;
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awl_hash_t * awl_init (size_t poolsize, int hits, int ttl);
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int awl_check (uint32_t ip, awl_hash_t *hash, time_t tm);
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void awl_add (uint32_t ip, awl_hash_t *hash, time_t tm);
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#endif
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/*
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* vi:ts=4
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*/
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