smtpd.h revision 1.65 
1/*	$OpenBSD: smtpd.h,v 1.65 2009/01/30 20:11:13 form Exp $	*/
2
3/*
4 * Copyright (c) 2008 Gilles Chehade <gilles@openbsd.org>
5 * Copyright (c) 2008 Pierre-Yves Ritschard <pyr@openbsd.org>
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20#define CONF_FILE		 "/etc/mail/smtpd.conf"
21#define MAX_LISTEN		 16
22#define PROC_COUNT		 9
23#define READ_BUF_SIZE		 32768
24#define MAX_NAME_SIZE		 64
25
26#define MAX_HOPS_COUNT		 100
27
28/* sizes include the tailing '\0' */
29#define MAX_LINE_SIZE		 1024
30#define MAX_LOCALPART_SIZE	 65
31#define MAX_DOMAINPART_SIZE	 MAXHOSTNAMELEN
32#define MAX_ID_SIZE		 64
33
34/* return and forward path size */
35#define MAX_PATH_SIZE		 256
36
37/*#define SMTPD_CONNECT_TIMEOUT	 (60)*/
38#define SMTPD_CONNECT_TIMEOUT	 (10)
39#define SMTPD_QUEUE_INTERVAL	 (15 * 60)
40#define SMTPD_QUEUE_MAXINTERVAL	 (4 * 60 * 60)
41#define SMTPD_QUEUE_EXPIRY	 (4 * 24 * 60 * 60)
42#define SMTPD_USER		 "_smtpd"
43#define SMTPD_SOCKET		 "/var/run/smtpd.sock"
44#define SMTPD_BANNER		 "220 %s ESMTP OpenSMTPD"
45#define SMTPD_SESSION_TIMEOUT	 300
46#define SMTPD_BACKLOG		 5
47
48#define	DIRHASH_BUCKETS		 4096
49
50#define PATH_SPOOL		"/var/spool/smtpd"
51
52#define PATH_ENQUEUE		"/enqueue"
53#define PATH_INCOMING		"/incoming"
54#define PATH_QUEUE		"/queue"
55#define PATH_PURGE		"/purge"
56
57#define PATH_MESSAGE		"/message"
58#define PATH_ENVELOPES		"/envelopes"
59
60#define PATH_RUNQUEUE		"/runqueue"
61#define PATH_RUNQUEUEHIGH	"/runqueue-high"
62#define PATH_RUNQUEUELOW	"/runqueue-low"
63
64/* used by newaliases */
65#define	PATH_ALIASES		"/etc/mail/aliases"
66#define	PATH_ALIASESDB		"/etc/mail/aliases.db"
67
68/* number of MX records to lookup */
69#define MXARRAYSIZE	5
70
71/* rfc5321 limits */
72#define	SMTP_TEXTLINE_MAX	1000
73#define	SMTP_CMDLINE_MAX	512
74
75#define F_STARTTLS		 0x01
76#define F_SSMTP			 0x02
77#define F_AUTH			 0x04
78#define F_SSL			(F_SSMTP|F_STARTTLS)
79
80
81struct netaddr {
82	struct sockaddr_storage ss;
83	int bits;
84};
85
86struct relayhost {
87	u_int8_t flags;
88	char hostname[MAXHOSTNAMELEN];
89	u_int16_t port;
90};
91
92struct mxhost {
93	u_int8_t flags;
94	struct sockaddr_storage ss;
95};
96
97/* buffer specific headers */
98struct buf {
99	TAILQ_ENTRY(buf)	 entry;
100	u_char			*buf;
101	size_t			 size;
102	size_t			 max;
103	size_t			 wpos;
104	size_t			 rpos;
105	int			 fd;
106};
107
108struct msgbuf {
109	TAILQ_HEAD(, buf)	 bufs;
110	u_int32_t		 queued;
111	int			 fd;
112};
113
114struct buf_read {
115	u_char			 buf[READ_BUF_SIZE];
116	u_char			*rptr;
117	size_t			 wpos;
118};
119
120struct imsg_fd  {
121	TAILQ_ENTRY(imsg_fd)	 entry;
122	int			 fd;
123	u_int32_t		 id;
124};
125
126struct imsgbuf {
127	TAILQ_HEAD(, imsg_fd)	 fds;
128	struct buf_read		 r;
129	struct msgbuf		 w;
130	struct event		 ev;
131	void			(*handler)(int, short, void *);
132	int			 fd;
133	pid_t			 pid;
134	short			 events;
135	void			*data;
136	u_int32_t		 id;
137};
138
139struct imsg_hdr {
140	u_int16_t		 type;
141	u_int16_t		 len;
142	u_int32_t		 peerid;
143	pid_t			 pid;
144};
145
146struct imsg {
147	struct imsg_hdr		 hdr;
148	u_int32_t		 id;
149	void			*data;
150};
151
152enum imsg_type {
153	IMSG_NONE,
154	IMSG_CTL_OK,		/* answer to smtpctl requests */
155	IMSG_CTL_FAIL,
156	IMSG_CTL_SHUTDOWN,
157	IMSG_CONF_START,
158	IMSG_CONF_SSL,
159	IMSG_CONF_SSL_CERT,
160	IMSG_CONF_SSL_KEY,
161	IMSG_CONF_LISTENER,
162	IMSG_CONF_MAP,
163	IMSG_CONF_RULE,
164	IMSG_CONF_CONDITION,
165	IMSG_CONF_OPTION,
166	IMSG_CONF_END,
167	IMSG_CONF_RELOAD,
168	IMSG_LKA_MAIL,
169	IMSG_LKA_RCPT,
170	IMSG_LKA_MX,
171	IMSG_LKA_HOST,
172	IMSG_MDA_MAILBOX_FILE,
173	IMSG_MDA_MESSAGE_FILE,
174	IMSG_MFA_RCPT,
175	IMSG_MFA_MAIL,
176
177	IMSG_QUEUE_CREATE_MESSAGE,
178	IMSG_QUEUE_SUBMIT_ENVELOPE,
179	IMSG_QUEUE_COMMIT_ENVELOPES,
180	IMSG_QUEUE_REMOVE_MESSAGE,
181	IMSG_QUEUE_COMMIT_MESSAGE,
182	IMSG_QUEUE_TEMPFAIL,
183	IMSG_QUEUE_STATS,
184
185	IMSG_QUEUE_REMOVE_SUBMISSION,
186	IMSG_QUEUE_MESSAGE_UPDATE,
187	IMSG_QUEUE_MESSAGE_FD,
188	IMSG_QUEUE_MESSAGE_FILE,
189
190	IMSG_RUNNER_UPDATE_ENVELOPE,
191	IMSG_RUNNER_STATS,
192
193	IMSG_BATCH_CREATE,
194	IMSG_BATCH_APPEND,
195	IMSG_BATCH_CLOSE,
196
197	IMSG_PARENT_MAILBOX_OPEN,
198	IMSG_PARENT_MESSAGE_OPEN,
199	IMSG_PARENT_MAILBOX_RENAME,
200	IMSG_PARENT_STATS,
201
202	IMSG_PARENT_AUTHENTICATE,
203	IMSG_PARENT_SEND_CONFIG,
204
205	IMSG_MDA_PAUSE,
206	IMSG_MTA_PAUSE,
207	IMSG_SMTP_PAUSE,
208	IMSG_SMTP_STATS,
209
210	IMSG_MDA_RESUME,
211	IMSG_MTA_RESUME,
212	IMSG_SMTP_RESUME,
213
214	IMSG_STATS
215};
216
217#define IMSG_HEADER_SIZE	 sizeof(struct imsg_hdr)
218#define	MAX_IMSGSIZE		 16384
219
220enum blockmodes {
221	BM_NORMAL,
222	BM_NONBLOCK
223};
224
225struct ctl_conn {
226	TAILQ_ENTRY(ctl_conn)	 entry;
227	u_int8_t		 flags;
228#define CTL_CONN_NOTIFY		 0x01
229	struct imsgbuf		 ibuf;
230};
231TAILQ_HEAD(ctl_connlist, ctl_conn);
232
233typedef u_int32_t		 objid_t;
234
235struct ctl_id {
236	objid_t		 id;
237	char		 name[MAX_NAME_SIZE];
238};
239
240enum smtp_proc_type {
241	PROC_PARENT = 0,
242	PROC_SMTP,
243	PROC_MFA,
244	PROC_LKA,
245	PROC_QUEUE,
246	PROC_MDA,
247	PROC_MTA,
248	PROC_CONTROL,
249	PROC_RUNNER,
250} smtpd_process;
251
252struct peer {
253	enum smtp_proc_type	 id;
254	void			(*cb)(int, short, void *);
255};
256
257enum map_type {
258	T_SINGLE,
259	T_LIST,
260	T_HASH
261};
262
263enum map_src {
264	S_NONE,
265	S_DYN,
266	S_DNS,
267	S_FILE,
268	S_DB,
269	S_EXT
270};
271
272enum mapel_type {
273	ME_STRING,
274	ME_NET,
275	ME_NETMASK
276};
277
278struct mapel {
279	TAILQ_ENTRY(mapel)		 me_entry;
280	union mapel_data {
281		char			 med_string[MAX_LINE_SIZE];
282		struct netaddr		 med_addr;
283	}				 me_key;
284	union mapel_data		 me_val;
285};
286
287struct map {
288	TAILQ_ENTRY(map)		 m_entry;
289#define F_USED				 0x01
290#define F_DYNAMIC			 0x02
291	u_int8_t			 m_flags;
292	char				 m_name[MAX_LINE_SIZE];
293	objid_t				 m_id;
294	enum map_type			 m_type;
295	enum mapel_type			 m_eltype;
296	enum map_src			 m_src;
297	char				 m_config[MAXPATHLEN];
298	TAILQ_HEAD(mapel_list, mapel)	 m_contents;
299};
300
301enum cond_type {
302	C_ALL,
303	C_NET,
304	C_DOM
305};
306
307struct cond {
308	TAILQ_ENTRY(cond)		 c_entry;
309	objid_t				 c_map;
310	enum cond_type			 c_type;
311	struct map			*c_match;
312};
313
314enum opt_type {
315	O_RWUSER,			/* rewrite user */
316	O_RWDOMAIN,			/* rewrite domain */
317};
318
319struct opt {
320	TAILQ_ENTRY(opt)		 o_entry;
321	enum opt_type			 o_type;
322};
323
324enum action_type {
325	A_RELAY,
326	A_RELAYVIA,
327	A_MAILDIR,
328	A_MBOX,
329	A_FILENAME,
330	A_EXT
331};
332#define IS_MAILBOX(x)	((x) == A_MAILDIR || (x) == A_MBOX || (x) == A_FILENAME)
333#define IS_RELAY(x)	((x) == A_RELAY || (x) == A_RELAYVIA)
334#define IS_EXT(x)	((x) == A_EXT)
335
336struct rule {
337	TAILQ_ENTRY(rule)		 r_entry;
338	int				 r_accept;
339	struct map			*r_sources;
340	TAILQ_HEAD(condlist, cond)	 r_conditions;
341	enum action_type		 r_action;
342	union rule_dest {
343		char			 path[MAXPATHLEN];
344		struct relayhost       	 relayhost;
345#define	MAXCOMMANDLEN	256
346		char			 command[MAXCOMMANDLEN];
347	}				 r_value;
348	TAILQ_HEAD(optlist, opt)	 r_options;
349};
350
351enum path_flags {
352	F_ALIAS = 0x1,
353	F_VIRTUAL = 0x2,
354	F_EXPANDED = 0x4,
355	F_NOFORWARD = 0x8,
356	F_FORWARDED = 0x10,
357	F_ACCOUNT = 0x20,
358};
359
360struct path {
361	TAILQ_ENTRY(path)		 entry;
362	struct rule			 rule;
363	enum path_flags			 flags;
364	u_int8_t			 forwardcnt;
365	char				 user[MAX_LOCALPART_SIZE];
366	char				 domain[MAX_DOMAINPART_SIZE];
367	char				 pw_name[MAXLOGNAME];
368	union path_data {
369		char filename[MAXPATHLEN];
370		char filter[MAXPATHLEN];
371	}				 u;
372};
373
374enum alias_type {
375	ALIAS_USERNAME,
376	ALIAS_FILENAME,
377	ALIAS_FILTER,
378	ALIAS_INCLUDE,
379	ALIAS_ADDRESS
380};
381
382struct alias {
383	TAILQ_ENTRY(alias)		entry;
384	enum alias_type			 type;
385	union alias_data {
386		char username[MAXLOGNAME];
387		char filename[MAXPATHLEN];
388		char filter[MAXPATHLEN];
389		struct path path;
390	}                                   u;
391};
392TAILQ_HEAD(aliaseslist, alias);
393
394enum message_type {
395	T_MDA_MESSAGE		= 0x1,
396	T_MTA_MESSAGE		= 0x2,
397	T_DAEMON_MESSAGE	= 0x4
398};
399
400enum message_status {
401	S_MESSAGE_LOCKFAILURE	= 0x1,
402	S_MESSAGE_PERMFAILURE	= 0x2,
403	S_MESSAGE_TEMPFAILURE	= 0x4,
404	S_MESSAGE_REJECTED	= 0x8,
405	S_MESSAGE_ACCEPTED	= 0x10,
406	S_MESSAGE_RETRY		= 0x20,
407	S_MESSAGE_EDNS		= 0x40,
408	S_MESSAGE_ECONNECT	= 0x80
409};
410
411enum message_flags {
412	F_MESSAGE_RESOLVED	= 0x1,
413	F_MESSAGE_SCHEDULED	= 0x2,
414	F_MESSAGE_PROCESSING	= 0x4,
415	F_MESSAGE_AUTHENTICATED	= 0x8,
416	F_MESSAGE_ENQUEUED	= 0x10
417};
418
419struct message {
420	SPLAY_ENTRY(message)		 nodes;
421	TAILQ_ENTRY(message)		 entry;
422
423	enum message_type		 type;
424
425	u_int64_t			 id;
426	u_int64_t			 session_id;
427	u_int64_t			 batch_id;
428
429	char				 message_id[MAX_ID_SIZE];
430	char				 message_uid[MAX_ID_SIZE];
431
432	char				 session_helo[MAXHOSTNAMELEN];
433	char				 session_hostname[MAXHOSTNAMELEN];
434	char				 session_errorline[MAX_LINE_SIZE];
435	struct sockaddr_storage		 session_ss;
436	struct path			 session_rcpt;
437
438	struct path			 sender;
439	struct path			 recipient;
440	TAILQ_HEAD(pathlist,path)	 recipients;
441
442	u_int16_t			 rcptcount;
443
444	time_t				 creation;
445	time_t				 lasttry;
446	u_int8_t			 retry;
447	enum message_flags		 flags;
448	enum message_status		 status;
449	FILE				*datafp;
450	int				 mboxfd;
451	int				 messagefd;
452};
453
454enum batch_status {
455	S_BATCH_PERMFAILURE	= 0x1,
456	S_BATCH_TEMPFAILURE	= 0x2,
457	S_BATCH_REJECTED	= 0x4,
458	S_BATCH_ACCEPTED	= 0x8,
459	S_BATCH_RETRY		= 0x10,
460	S_BATCH_EDNS		= 0x20,
461	S_BATCH_ECONNECT	= 0x40
462};
463
464enum batch_type {
465	T_MDA_BATCH		= 0x1,
466	T_MTA_BATCH		= 0x2,
467	T_DAEMON_BATCH		= 0x4
468};
469
470enum batch_flags {
471	F_BATCH_COMPLETE	= 0x1,
472	F_BATCH_RESOLVED	= 0x2,
473	F_BATCH_SCHEDULED	= 0x4,
474	F_BATCH_EXPIRED		= 0x8,
475};
476
477struct mdaproc {
478	SPLAY_ENTRY(mdaproc)	mdaproc_nodes;
479
480	pid_t			pid;
481};
482
483struct batch {
484	SPLAY_ENTRY(batch)	 b_nodes;
485
486	u_int64_t		 id;
487	u_int64_t		 session_id;
488	enum batch_type		 type;
489	enum batch_flags	 flags;
490
491	struct rule			 rule;
492
493	struct smtpd			*env;
494
495	char				 message_id[MAX_ID_SIZE];
496	char				 hostname[MAXHOSTNAMELEN];
497	char				 errorline[MAX_LINE_SIZE];
498
499	char				 session_helo[MAXHOSTNAMELEN];
500	char				 session_hostname[MAXHOSTNAMELEN];
501	struct sockaddr_storage		 session_ss;
502
503	int8_t				 getaddrinfo_error;
504	struct mxhost			 mxarray[MXARRAYSIZE*2];
505	u_int8_t			 mx_cnt;
506	u_int8_t			 mx_off;
507
508	time_t				 creation;
509	time_t				 lasttry;
510	u_int8_t			 retry;
511
512	struct session			*sessionp;
513
514	struct message			message;
515	struct message			*messagep;
516	FILE				*messagefp;
517	TAILQ_HEAD(messagelist, message) messages;
518
519	enum batch_status		status;
520};
521
522enum session_state {
523	S_INIT = 0,
524	S_GREETED,
525	S_TLS,
526	S_AUTH_INIT,
527	S_AUTH_USERNAME,
528	S_AUTH_PASSWORD,
529	S_AUTH_FINALIZE,
530	S_HELO,
531	S_MAILREQUEST,
532	S_MAIL,
533	S_RCPTREQUEST,
534	S_RCPT,
535	S_DATAREQUEST,
536	S_DATA,
537	S_DATACONTENT,
538	S_DONE,
539	S_QUIT
540};
541#define	IS_AUTH(x)	((x) == S_AUTH_INIT || (x) == S_AUTH_USERNAME || (x) == S_AUTH_PASSWORD || (x) == S_AUTH_FINALIZE)
542
543struct ssl {
544	SPLAY_ENTRY(ssl)	 ssl_nodes;
545	char			 ssl_name[PATH_MAX];
546	char			*ssl_cert;
547	off_t			 ssl_cert_len;
548	char			*ssl_key;
549	off_t			 ssl_key_len;
550};
551
552struct listener {
553	u_int8_t		 flags;
554	int			 fd;
555	struct sockaddr_storage	 ss;
556	in_port_t		 port;
557	struct timeval		 timeout;
558	struct event		 ev;
559	struct smtpd		*env;
560	char			 ssl_cert_name[PATH_MAX];
561	struct ssl		*ssl;
562	void			*ssl_ctx;
563	TAILQ_ENTRY(listener)	 entry;
564};
565
566struct session_auth_req {
567	u_int64_t	session_id;
568	char		buffer[MAX_LINE_SIZE];
569};
570
571struct session_auth_reply {
572	u_int64_t	session_id;
573	u_int8_t	value;
574};
575
576enum session_flags {
577	F_EHLO		= 0x1,
578	F_QUIT		= 0x2,
579	F_8BITMIME	= 0x4,
580	F_SECURE	= 0x8,
581	F_AUTHENTICATED	= 0x10,
582	F_PEERHASTLS	= 0x20,
583	F_EVLOCKED	= 0x40
584};
585
586struct session {
587	SPLAY_ENTRY(session)		 s_nodes;
588	u_int64_t			 s_id;
589
590	enum session_flags		 s_flags;
591	enum session_state		 s_state;
592	time_t				 s_tm;
593	int				 s_fd;
594	struct sockaddr_storage		 s_ss;
595	char				 s_hostname[MAXHOSTNAMELEN];
596	struct event			 s_ev;
597	struct bufferevent		*s_bev;
598	struct listener			*s_l;
599	struct smtpd			*s_env;
600	void				*s_ssl;
601	u_char				*s_buf;
602	int				 s_buflen;
603	struct timeval			 s_tv;
604	struct message			 s_msg;
605
606	struct session_auth_req		 s_auth;
607
608	struct mxhost			*mxarray;
609	u_int8_t			 mx_cnt;
610	u_int8_t			 mx_off;
611
612	struct batch			*batch;
613
614};
615
616struct smtpd {
617#define SMTPD_OPT_VERBOSE			 0x00000001
618#define SMTPD_OPT_NOACTION			 0x00000002
619	u_int32_t				 sc_opts;
620#define SMTPD_CONFIGURING			 0x00000001
621#define SMTPD_EXITING				 0x00000002
622#define SMTPD_MDA_PAUSED		       	 0x00000004
623#define SMTPD_MTA_PAUSED		       	 0x00000008
624#define SMTPD_SMTP_PAUSED		       	 0x00000010
625	u_int32_t				 sc_flags;
626	struct timeval				 sc_qintval;
627	u_int32_t				 sc_maxconn;
628	struct event				 sc_ev;
629	int					 sc_pipes[PROC_COUNT]
630						    [PROC_COUNT][2];
631	struct imsgbuf				*sc_ibufs[PROC_COUNT];
632	struct passwd				*sc_pw;
633	char					 sc_hostname[MAXHOSTNAMELEN];
634	TAILQ_HEAD(listenerlist, listener)	 sc_listeners;
635	TAILQ_HEAD(maplist, map)		*sc_maps;
636	TAILQ_HEAD(rulelist, rule)		*sc_rules;
637	SPLAY_HEAD(sessiontree, session)	 sc_sessions;
638	SPLAY_HEAD(msgtree, message)		 sc_messages;
639	SPLAY_HEAD(ssltree, ssl)		 sc_ssl;
640
641	SPLAY_HEAD(batchtree, batch)		batch_queue;
642	SPLAY_HEAD(mdaproctree, mdaproc)	mdaproc_queue;
643};
644
645struct s_parent {
646	time_t		start;
647};
648
649struct s_queue {
650	size_t		inserts;
651};
652
653struct s_runner {
654	size_t		active;
655};
656
657struct s_smtp {
658	size_t		clients;
659};
660
661struct stats {
662	int			fd;
663	union u_stats {
664		struct s_parent	parent;
665		struct s_queue	queue;
666		struct s_runner	runner;
667		struct s_smtp	smtp;
668	}			u;
669};
670
671struct submit_status {
672	u_int64_t			 id;
673	int				 code;
674	union submit_path {
675		struct path		 path;
676		char			 msgid[MAX_ID_SIZE];
677		char			 errormsg[MAX_LINE_SIZE];
678	}				 u;
679	enum message_flags		 flags;
680	struct sockaddr_storage		 ss;
681	struct message			 msg;
682};
683
684struct message_recipient {
685	u_int64_t			 id;
686	struct sockaddr_storage		 ss;
687	enum message_flags		 flags;
688	struct path			 path;
689	struct message			 msg;
690};
691
692
693/* aliases.c */
694int aliases_exist(struct smtpd *, char *);
695int aliases_get(struct smtpd *, struct aliaseslist *, char *);
696int aliases_virtual_exist(struct smtpd *, struct path *);
697int aliases_virtual_get(struct smtpd *, struct aliaseslist *, struct path *);
698int alias_parse(struct alias *, char *);
699
700
701/* log.c */
702void		log_init(int);
703void		log_warn(const char *, ...)
704    __attribute__ ((format (printf, 1, 2)));
705void		log_warnx(const char *, ...)
706    __attribute__ ((format (printf, 1, 2)));
707void		log_info(const char *, ...)
708    __attribute__ ((format (printf, 1, 2)));
709void		log_debug(const char *, ...)
710    __attribute__ ((format (printf, 1, 2)));
711__dead void	fatal(const char *);
712__dead void	fatalx(const char *);
713
714
715/* buffer.c */
716struct buf	*buf_open(size_t);
717struct buf	*buf_dynamic(size_t, size_t);
718int		 buf_add(struct buf *, void *, size_t);
719void		*buf_reserve(struct buf *, size_t);
720int		 buf_close(struct msgbuf *, struct buf *);
721void		 buf_free(struct buf *);
722void		 msgbuf_init(struct msgbuf *);
723void		 msgbuf_clear(struct msgbuf *);
724int		 msgbuf_write(struct msgbuf *);
725
726
727/* dns.c */
728size_t getmxbyname(char *, char ***);
729
730
731/* forward.c */
732int forwards_get(struct aliaseslist *, char *);
733
734
735/* imsg.c */
736void	 imsg_init(struct imsgbuf *, int, void (*)(int, short, void *));
737ssize_t	 imsg_read(struct imsgbuf *);
738ssize_t	 imsg_get(struct imsgbuf *, struct imsg *);
739int	 imsg_compose(struct imsgbuf *, enum imsg_type, u_int32_t, pid_t,
740	    int, void *, u_int16_t);
741int	 imsg_composev(struct imsgbuf *, enum imsg_type, u_int32_t,
742	    pid_t, int, const struct iovec *, int);
743int	 imsg_compose_fds(struct imsgbuf *, enum imsg_type, u_int32_t, pid_t,
744	    void *, u_int16_t, int, ...);
745struct buf *imsg_create(struct imsgbuf *, enum imsg_type, u_int32_t, pid_t,
746	    u_int16_t);
747int	 imsg_add(struct buf *, void *, u_int16_t);
748int	 imsg_append(struct imsgbuf *, struct buf *);
749int	 imsg_close(struct imsgbuf *, struct buf *);
750void	 imsg_free(struct imsg *);
751void	 imsg_event_add(struct imsgbuf *); /* needs to be provided externally */
752int	 imsg_get_fd(struct imsgbuf *, struct imsg *);
753int	 imsg_flush(struct imsgbuf *);
754void	 imsg_clear(struct imsgbuf *);
755
756/* lka.c */
757pid_t		 lka(struct smtpd *);
758
759/* mfa.c */
760pid_t		 mfa(struct smtpd *);
761int		 msg_cmp(struct message *, struct message *);
762SPLAY_PROTOTYPE(msgtree, message, nodes, msg_cmp);
763
764/* queue.c */
765pid_t		 queue(struct smtpd *);
766u_int64_t	 queue_generate_id(void);
767int		 queue_remove_batch_message(struct smtpd *, struct batch *,
768 		     struct message *);
769int		 queue_load_envelope(struct message *, char *);
770int		 queue_update_envelope(struct message *);
771int		 queue_remove_envelope(struct message *);
772int		 batch_cmp(struct batch *, struct batch *);
773struct batch    *batch_by_id(struct smtpd *, u_int64_t);
774struct message	*message_by_id(struct smtpd *, struct batch *, u_int64_t);
775u_int16_t	 queue_hash(char *);
776
777/* queue_shared.c */
778int		 queue_create_layout_message(char *, char *);
779void		 queue_delete_layout_message(char *, char *);
780int		 queue_record_layout_envelope(char *, struct message *);
781int		 queue_remove_layout_envelope(char *, struct message *);
782int		 queue_commit_layout_message(char *, struct message *);
783int		 queue_open_layout_messagefile(char *, struct message *);
784int		 enqueue_create_layout(char *);
785void		 enqueue_delete_message(char *);
786int		 enqueue_record_envelope(struct message *);
787int		 enqueue_remove_envelope(struct message *);
788int		 enqueue_commit_message(struct message *);
789int		 enqueue_open_messagefile(struct message *);
790int		 queue_create_incoming_layout(char *);
791void		 queue_delete_incoming_message(char *);
792int		 queue_record_incoming_envelope(struct message *);
793int		 queue_remove_incoming_envelope(struct message *);
794int		 queue_commit_incoming_message(struct message *);
795int		 queue_open_incoming_message_file(struct message *);
796int		 queue_open_message_file(char *msgid);
797void		 queue_message_update(struct message *);
798void		 queue_delete_message(char *);
799struct qwalk	*qwalk_new(char *);
800int		 qwalk(struct qwalk *, char *);
801void		 qwalk_close(struct qwalk *);
802void		 show_queue(char *, int);
803
804u_int16_t	queue_hash(char *);
805
806/* mda.c */
807pid_t		 mda(struct smtpd *);
808int		 mdaproc_cmp(struct mdaproc *, struct mdaproc *);
809SPLAY_PROTOTYPE(mdaproctree, mdaproc, mdaproc_nodes, mdaproc_cmp);
810
811/* mta.c */
812pid_t		 mta(struct smtpd *);
813
814/* control.c */
815pid_t		 control(struct smtpd *);
816void		 session_socket_blockmode(int, enum blockmodes);
817
818/* runner.c */
819pid_t		 runner(struct smtpd *);
820SPLAY_PROTOTYPE(batchtree, batch, b_nodes, batch_cmp);
821
822
823/* smtp.c */
824pid_t		 smtp(struct smtpd *);
825void		 smtp_listener_setup(struct smtpd *, struct listener *);
826
827/* smtp_session.c */
828void		 session_init(struct listener *, struct session *);
829int		 session_cmp(struct session *, struct session *);
830void		 session_pickup(struct session *, struct submit_status *);
831void		 session_destroy(struct session *);
832void		 session_respond(struct session *, char *, ...)
833		    __attribute__ ((format (printf, 2, 3)));
834
835SPLAY_PROTOTYPE(sessiontree, session, s_nodes, session_cmp);
836
837/* store.c */
838int store_write_header(struct batch *, struct message *, FILE *, int);
839int store_write_message(struct batch *, struct message *);
840int store_write_daemon(struct batch *, struct message *);
841int store_message(struct batch *, struct message *,
842    int (*)(struct batch *, struct message *));
843
844/* config.c */
845#define		 PURGE_LISTENERS	0x01
846#define		 PURGE_MAPS		0x02
847#define		 PURGE_RULES		0x04
848#define		 PURGE_SSL		0x08
849#define		 PURGE_EVERYTHING	0xff
850void		 purge_config(struct smtpd *, u_int8_t);
851void		 unconfigure(struct smtpd *);
852void		 configure(struct smtpd *);
853void		 init_peers(struct smtpd *);
854void		 config_peers(struct smtpd *, struct peer *, u_int);
855
856/* parse.y */
857int		 parse_config(struct smtpd *, const char *, int);
858int		 cmdline_symset(char *);
859
860/* ssl.c */
861void	 ssl_init(void);
862void	 ssl_transaction(struct session *);
863
864void	 ssl_session_init(struct session *);
865void	 ssl_session_destroy(struct session *);
866int	 ssl_load_certfile(struct smtpd *, const char *);
867void	 ssl_setup(struct smtpd *, struct listener *);
868int	 ssl_cmp(struct ssl *, struct ssl *);
869SPLAY_PROTOTYPE(ssltree, ssl, ssl_nodes, ssl_cmp);
870
871/* ssl_privsep.c */
872int	 ssl_ctx_use_private_key(void *, char *, off_t);
873int	 ssl_ctx_use_certificate_chain(void *, char *, off_t);
874
875/* smtpd.c */
876struct map	*map_find(struct smtpd *, objid_t);
877struct map	*map_findbyname(struct smtpd *, const char *);
878
879/* util.c */
880int		 bsnprintf(char *, size_t, const char *, ...)
881    __attribute__ ((format (printf, 3, 4)));
882int		 safe_fclose(FILE *);
883struct passwd 	*safe_getpwnam(const char *);
884struct passwd 	*safe_getpwuid(uid_t);
885int		 hostname_match(char *, char *);
886int		 recipient_to_path(struct path *, char *);
887