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/* $OpenBSD: filter_api.h,v 1.4 2012/08/20 21:14:17 gilles Exp $ */
/*
* Copyright (c) 2011 Gilles Chehade <gilles@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.
*/
#include <sys/socket.h>
#include <netdb.h>
#define FILTER_API_VERSION 50
#define MAX_LINE_SIZE 2048
#define MAX_LOCALPART_SIZE 64
#define MAX_DOMAINPART_SIZE 255
enum filter_status {
STATUS_IGNORE,
STATUS_REJECT,
STATUS_ACCEPT,
STATUS_WAITING
};
enum filter_type {
FILTER_CONNECT = 0x001,
FILTER_HELO = 0x002,
FILTER_EHLO = 0x004,
FILTER_MAIL = 0x008,
FILTER_RCPT = 0x010,
FILTER_DATALINE = 0x020,
FILTER_QUIT = 0x040,
FILTER_CLOSE = 0x080,
FILTER_RSET = 0x100,
};
struct filter_connect {
char hostname[MAXHOSTNAMELEN];
struct sockaddr_storage hostaddr;
};
struct filter_helo {
char helohost[MAXHOSTNAMELEN];
};
struct filter_mail {
char user[MAX_LOCALPART_SIZE];
char domain[MAX_DOMAINPART_SIZE];
};
struct filter_rcpt {
char user[MAX_LOCALPART_SIZE];
char domain[MAX_DOMAINPART_SIZE];
};
struct filter_dataline {
char line[MAX_LINE_SIZE];
};
union filter_union {
struct filter_connect connect;
struct filter_helo helo;
struct filter_mail mail;
struct filter_rcpt rcpt;
struct filter_dataline dataline;
};
struct filter_msg {
uint64_t id; /* set by smtpd(8) */
uint64_t cl_id; /* set by smtpd(8) */
int8_t code;
uint8_t version;
enum filter_type type;
union filter_union u;
};
/**/
void filter_init(void);
void filter_loop(void);
void filter_register_connect_callback(enum filter_status (*)(uint64_t, struct filter_connect *, void *), void *);
void filter_register_helo_callback(enum filter_status (*)(uint64_t, struct filter_helo *, void *), void *);
void filter_register_ehlo_callback(enum filter_status (*)(uint64_t, struct filter_helo *, void *), void *);
void filter_register_mail_callback(enum filter_status (*)(uint64_t, struct filter_mail *, void *), void *);
void filter_register_rcpt_callback(enum filter_status (*)(uint64_t, struct filter_rcpt *, void *), void *);
void filter_register_dataline_callback(enum filter_status (*)(uint64_t, struct filter_dataline *, void *), void *);
void filter_register_quit_callback(enum filter_status (*)(uint64_t, void *), void *);
void filter_register_close_callback(enum filter_status (*)(uint64_t, void *), void *);
void filter_register_rset_callback(enum filter_status (*)(uint64_t, void *), void *);
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