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/* $OpenBSD: sync.h,v 1.3 2008/05/22 19:54:11 deraadt Exp $ */
/*
* Copyright (c) 2006, 2007 Reyk Floeter <reyk@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _SPAMD_SYNC
#define _SPAMD_SYNC
/*
* spamd(8) synchronisation protocol.
*
* This protocol has been designed for realtime synchronisation between
* multiple machines running spamd(8), ie. in front of a MX and a backup MX.
* It is a simple Type-Length-Value based protocol, it allows easy
* extension with future subtypes and bulk transfers by sending multiple
* entries at once. The unencrypted messages will be authenticated using
* HMAC-SHA1.
*
* the spamd(8) synchronisation protocol is not intended to be used as
* a public SPAM sender database or distribution between vendors.
*/
#define SPAM_SYNC_VERSION 2
#define SPAM_SYNC_MCASTADDR "224.0.1.240" /* XXX choose valid address */
#define SPAM_SYNC_MCASTTTL IP_DEFAULT_MULTICAST_TTL
#define SPAM_SYNC_HMAC_LEN 20 /* SHA1 */
#define SPAM_SYNC_MAXSIZE 1408
#define SPAM_SYNC_KEY "/etc/mail/spamd.key"
#define SPAM_ALIGNBYTES (15)
#define SPAM_ALIGN(p) (((u_int)(p) + SPAM_ALIGNBYTES) &~ SPAM_ALIGNBYTES)
struct spam_synchdr {
u_int8_t sh_version;
u_int8_t sh_af;
u_int16_t sh_length;
u_int32_t sh_counter;
u_int8_t sh_hmac[SPAM_SYNC_HMAC_LEN];
u_int8_t sh_pad[4];
} __packed;
struct spam_synctlv_hdr {
u_int16_t st_type;
u_int16_t st_length;
} __packed;
struct spam_synctlv_grey {
u_int16_t sg_type;
u_int16_t sg_length;
u_int32_t sg_timestamp;
u_int32_t sg_ip;
u_int16_t sg_from_length;
u_int16_t sg_to_length;
u_int16_t sg_helo_length;
/* strings go here, then packet code re-aligns packet */
} __packed;
struct spam_synctlv_addr {
u_int16_t sd_type;
u_int16_t sd_length;
u_int32_t sd_timestamp;
u_int32_t sd_expire;
u_int32_t sd_ip;
} __packed;
#define SPAM_SYNC_END 0x0000
#define SPAM_SYNC_GREY 0x0001
#define SPAM_SYNC_WHITE 0x0002
#define SPAM_SYNC_TRAPPED 0x0003
extern int sync_init(const char *, const char *, u_short);
extern int sync_addhost(const char *, u_short);
extern void sync_recv(void);
extern void sync_update(time_t, char *, char *, char *, char *);
extern void sync_white(time_t, time_t, char *);
extern void sync_trapped(time_t, time_t, char *);
#endif /* _SPAMD_SYNC */
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