92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
/* $OpenBSD: sync.h,v 1.3 2008/05/22 19:54:11 deraadt Exp $ */
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/*
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* Copyright (c) 2006, 2007 Reyk Floeter <reyk@openbsd.org>
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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 THE AUTHOR 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 THE AUTHOR 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 OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef _SPAMD_SYNC
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#define _SPAMD_SYNC
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/*
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* spamd(8) synchronisation protocol.
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*
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* This protocol has been designed for realtime synchronisation between
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* multiple machines running spamd(8), ie. in front of a MX and a backup MX.
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* It is a simple Type-Length-Value based protocol, it allows easy
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* extension with future subtypes and bulk transfers by sending multiple
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* entries at once. The unencrypted messages will be authenticated using
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* HMAC-SHA1.
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*
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* the spamd(8) synchronisation protocol is not intended to be used as
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* a public SPAM sender database or distribution between vendors.
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*/
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#define SPAM_SYNC_VERSION 2
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#define SPAM_SYNC_MCASTADDR "224.0.1.240" /* XXX choose valid address */
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#define SPAM_SYNC_MCASTTTL IP_DEFAULT_MULTICAST_TTL
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#define SPAM_SYNC_HMAC_LEN 20 /* SHA1 */
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#define SPAM_SYNC_MAXSIZE 1408
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#define SPAM_SYNC_KEY "/etc/mail/spamd.key"
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#define SPAM_ALIGNBYTES (15)
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#define SPAM_ALIGN(p) (((u_int)(p) + SPAM_ALIGNBYTES) &~ SPAM_ALIGNBYTES)
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struct spam_synchdr {
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u_int8_t sh_version;
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u_int8_t sh_af;
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u_int16_t sh_length;
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u_int32_t sh_counter;
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u_int8_t sh_hmac[SPAM_SYNC_HMAC_LEN];
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u_int8_t sh_pad[4];
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} __packed;
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struct spam_synctlv_hdr {
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u_int16_t st_type;
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u_int16_t st_length;
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} __packed;
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struct spam_synctlv_grey {
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u_int16_t sg_type;
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u_int16_t sg_length;
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u_int32_t sg_timestamp;
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u_int32_t sg_ip;
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u_int16_t sg_from_length;
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u_int16_t sg_to_length;
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u_int16_t sg_helo_length;
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/* strings go here, then packet code re-aligns packet */
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} __packed;
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struct spam_synctlv_addr {
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u_int16_t sd_type;
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u_int16_t sd_length;
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u_int32_t sd_timestamp;
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u_int32_t sd_expire;
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u_int32_t sd_ip;
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} __packed;
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#define SPAM_SYNC_END 0x0000
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#define SPAM_SYNC_GREY 0x0001
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#define SPAM_SYNC_WHITE 0x0002
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#define SPAM_SYNC_TRAPPED 0x0003
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extern int sync_init(const char *, const char *, u_short);
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extern int sync_addhost(const char *, u_short);
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extern void sync_recv(void);
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extern void sync_update(time_t, char *, char *, char *, char *);
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extern void sync_white(time_t, time_t, char *);
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extern void sync_trapped(time_t, time_t, char *);
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#endif /* _SPAMD_SYNC */
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