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git://git.code.sf.net/p/xtables-addons/xtables-addons
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7d8ffffd85
This requires Linux 2.6.35 or newer to build, so it is deactivated by default in the "mconfig" file.
128 lines
2.8 KiB
C
128 lines
2.8 KiB
C
#ifndef _IP_SET_TIMEOUT_H
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#define _IP_SET_TIMEOUT_H
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/* Copyright (C) 2003-2010 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifdef __KERNEL__
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/* How often should the gc be run by default */
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#define IPSET_GC_TIME (3 * 60)
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/* Timeout period depending on the timeout value of the given set */
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#define IPSET_GC_PERIOD(timeout) \
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((timeout/3) ? min_t(u32, (timeout)/3, IPSET_GC_TIME) : 1)
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/* Set is defined without timeout support: timeout value may be 0 */
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#define IPSET_NO_TIMEOUT UINT_MAX
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#define with_timeout(timeout) ((timeout) != IPSET_NO_TIMEOUT)
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static inline unsigned int
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ip_set_timeout_uget(struct nlattr *tb)
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{
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unsigned int timeout = ip_set_get_h32(tb);
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/* Userspace supplied TIMEOUT parameter: adjust crazy size */
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return timeout == IPSET_NO_TIMEOUT ? IPSET_NO_TIMEOUT - 1 : timeout;
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}
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#ifdef IP_SET_BITMAP_TIMEOUT
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/* Bitmap specific timeout constants and macros for the entries */
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/* Bitmap entry is unset */
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#define IPSET_ELEM_UNSET 0
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/* Bitmap entry is set with no timeout value */
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#define IPSET_ELEM_PERMANENT (UINT_MAX/2)
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static inline bool
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ip_set_timeout_test(unsigned long timeout)
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{
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return timeout != IPSET_ELEM_UNSET
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&& (timeout == IPSET_ELEM_PERMANENT
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|| time_after(timeout, jiffies));
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}
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static inline bool
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ip_set_timeout_expired(unsigned long timeout)
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{
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return timeout != IPSET_ELEM_UNSET
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&& timeout != IPSET_ELEM_PERMANENT
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&& time_before(timeout, jiffies);
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}
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static inline unsigned long
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ip_set_timeout_set(u32 timeout)
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{
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unsigned long t;
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if (!timeout)
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return IPSET_ELEM_PERMANENT;
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t = timeout * HZ + jiffies;
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if (t == IPSET_ELEM_UNSET || t == IPSET_ELEM_PERMANENT)
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/* Bingo! */
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t++;
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return t;
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}
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static inline u32
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ip_set_timeout_get(unsigned long timeout)
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{
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return timeout == IPSET_ELEM_PERMANENT ? 0 : (timeout - jiffies)/HZ;
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}
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#else
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/* Hash specific timeout constants and macros for the entries */
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/* Hash entry is set with no timeout value */
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#define IPSET_ELEM_PERMANENT 0
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static inline bool
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ip_set_timeout_test(unsigned long timeout)
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{
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return timeout == IPSET_ELEM_PERMANENT
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|| time_after(timeout, jiffies);
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}
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static inline bool
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ip_set_timeout_expired(unsigned long timeout)
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{
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return timeout != IPSET_ELEM_PERMANENT
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&& time_before(timeout, jiffies);
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}
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static inline unsigned long
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ip_set_timeout_set(u32 timeout)
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{
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unsigned long t;
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if (!timeout)
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return IPSET_ELEM_PERMANENT;
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t = timeout * HZ + jiffies;
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if (t == IPSET_ELEM_PERMANENT)
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/* Bingo! :-) */
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t++;
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return t;
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}
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static inline u32
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ip_set_timeout_get(unsigned long timeout)
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{
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return timeout == IPSET_ELEM_PERMANENT ? 0 : (timeout - jiffies)/HZ;
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}
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#endif /* ! IP_SET_BITMAP_TIMEOUT */
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#endif /* __KERNEL__ */
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#endif /* _IP_SET_TIMEOUT_H */
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