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/*
* Copyright (c) 2003 Proofpoint, Inc. and its suppliers.
* All rights reserved.
*
* By using this file, you agree to the terms and conditions set
* forth in the LICENSE file which can be found at the top level of
* the sendmail distribution.
*
* Contributed by Jose Marcio Martins da Cruz - Ecole des Mines de Paris
* Jose-Marcio.Martins@ensmp.fr
*/
/* a part of this code is based on inetd.c for which this copyright applies: */
/*
* Copyright (c) 1983, 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef RATECTRL_H
#define RATECTRL_H 1
#include <sendmail.h>
/*
** stuff included - given some warnings (inet_ntoa)
** - surely not everything is needed
*/
#if NETINET || NETINET6
# include <arpa/inet.h>
#endif
#include <sm/time.h>
#ifndef HASH_ALG
# define HASH_ALG 2
#endif
#ifndef RATECTL_DEBUG
# define RATECTL_DEBUG 0
#endif
/* this should be a power of 2, otherwise CPMHMASK doesn't work well */
#ifndef CPMHSIZE
# define CPMHSIZE 1024
#endif
#define CPMHMASK (CPMHSIZE-1)
#define CHTSIZE 6
/* Number of connections for a certain "tick" */
typedef struct CTime
{
unsigned long ct_Ticks;
int ct_Count;
}
CTime_T;
typedef struct CHash
{
#if NETINET6 && NETINET
union
{
struct in_addr c4_Addr;
struct in6_addr c6_Addr;
} cu_Addr;
# define ch_Addr4 cu_Addr.c4_Addr
# define ch_Addr6 cu_Addr.c6_Addr
#else /* NETINET6 && NETINET */
# if NETINET6
struct in6_addr ch_Addr;
# define ch_Addr6 ch_Addr
# else /* NETINET6 */
struct in_addr ch_Addr;
# define ch_Addr4 ch_Addr
# endif /* NETINET6 */
#endif /* NETINET6 && NETINET */
int ch_Family;
time_t ch_LTime;
unsigned long ch_colls;
/* 6 buckets for ticks: 60s */
CTime_T ch_Times[CHTSIZE];
#if _FFR_OCC
int ch_oc; /* open connections */
#endif
}
CHash_T;
#define SM_CLFL_NONE 0x00
#define SM_CLFL_UPDATE 0x01
#define SM_CLFL_EXC 0x02 /* check if limit is exceeded */
extern void connection_rate_check __P((SOCKADDR *, ENVELOPE *));
extern int conn_limits __P((ENVELOPE *, time_t, SOCKADDR *, int, CHash_T *, int, int));
extern bool occ_exceeded __P((ENVELOPE *, MCI *, const char *, SOCKADDR *));
extern bool occ_close __P((ENVELOPE *, MCI *, const char *, SOCKADDR *));
extern void dump_ch __P((SM_FILE_T *));
#endif /* ! RATECTRL_H */
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