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source: trunk/third/sendmail/src/sendmail.h @ 12554

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Revision 12554, 58.1 KB checked in by danw, 26 years ago (diff)
This commit was generated by cvs2svn to compensate for changes in r12553, which included commits to RCS files with non-trunk default branches.

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1	/*
2	* Copyright (c) 1998 Sendmail, Inc. All rights reserved.
3	* Copyright (c) 1983, 1995-1997 Eric P. Allman. All rights reserved.
4	* Copyright (c) 1988, 1993
5	* The Regents of the University of California. All rights reserved.
6	*
7	* By using this file, you agree to the terms and conditions set
8	* forth in the LICENSE file which can be found at the top level of
9	* the sendmail distribution.
10	*
11	*
12	* @(#)sendmail.h 8.295 (Berkeley) 1/26/1999
13	*/
14
15	/*
16	** SENDMAIL.H -- Global definitions for sendmail.
17	*/
18
19	# ifdef _DEFINE
20	# define EXTERN
21	# ifndef lint
22	static char SmailSccsId[] = "@(#)sendmail.h 8.295 1/26/1999";
23	# endif
24	# else /* _DEFINE */
25	# define EXTERN extern
26	# endif /* _DEFINE */
27
28	# include <unistd.h>
29	# include <stddef.h>
30	# include <stdlib.h>
31	# include <stdio.h>
32	# include <ctype.h>
33	# include <setjmp.h>
34	# include <string.h>
35	# include <time.h>
36	# include <errno.h>
37	# ifdef EX_OK
38	# undef EX_OK /* for SVr4.2 SMP */
39	# endif
40	# include <sysexits.h>
41
42	# include "conf.h"
43	# include "useful.h"
44
45	# ifdef LOG
46	# include <syslog.h>
47	# endif /* LOG */
48
49	# if NETINET \|\| NETUNIX \|\| NETISO \|\| NETNS \|\| NETX25
50	# include <sys/socket.h>
51	# endif
52	# if NETUNIX
53	# include <sys/un.h>
54	# endif
55	# if NETINET
56	# include <netinet/in.h>
57	# endif
58	# if NETISO
59	# include <netiso/iso.h>
60	# endif
61	# if NETNS
62	# include <netns/ns.h>
63	# endif
64	# if NETX25
65	# include <netccitt/x25.h>
66	# endif
67
68	#if NAMED_BIND
69	# include <arpa/nameser.h>
70	# ifdef NOERROR
71	# undef NOERROR /* avoid <sys/streams.h> conflict */
72	# endif
73	#endif
74
75	#ifdef HESIOD
76	# include <hesiod.h>
77	# if !defined(HES_ER_OK) \|\| defined(HESIOD_INTERFACES)
78	# define HESIOD_INIT /* support for the new interface */
79	EXTERN void *HesiodContext;
80	# endif
81	#endif
82
83	/*
84	** Following are "sort of" configuration constants, but they should
85	** be pretty solid on most architectures today. They have to be
86	** defined after <arpa/nameser.h> because some versions of that
87	** file also define them. In all cases, we can't use sizeof because
88	** some systems (e.g., Crays) always treat everything as being at
89	** least 64 bits.
90	*/
91
92	#ifndef INADDRSZ
93	# define INADDRSZ 4 /* size of an IPv4 address in bytes */
94	#endif
95	#ifndef INT16SZ
96	# define INT16SZ 2 /* size of a 16 bit integer in bytes */
97	#endif
98	#ifndef INT32SZ
99	# define INT32SZ 4 /* size of a 32 bit integer in bytes */
100	#endif
101
102
103
104	/* forward references for prototypes */
105	typedef struct envelope ENVELOPE;
106	typedef struct mailer MAILER;
107
108
109	/*
110	** Data structure for bit maps.
111	**
112	** Each bit in this map can be referenced by an ascii character.
113	** This is 256 possible bits, or 32 8-bit bytes.
114	*/
115
116	#define BITMAPBYTES 32 /* number of bytes in a bit map */
117	#define BYTEBITS 8 /* number of bits in a byte */
118
119	/* internal macros */
120	#define _BITWORD(bit) ((bit) / (BYTEBITS * sizeof (int)))
121	#define _BITBIT(bit) (1 << ((bit) % (BYTEBITS * sizeof (int))))
122
123	typedef int BITMAP[BITMAPBYTES / sizeof (int)];
124
125	/* test bit number N */
126	#define bitnset(bit, map) ((map)[_BITWORD(bit)] & _BITBIT(bit))
127
128	/* set bit number N */
129	#define setbitn(bit, map) (map)[_BITWORD(bit)] \|= _BITBIT(bit)
130
131	/* clear bit number N */
132	#define clrbitn(bit, map) (map)[_BITWORD(bit)] &= ~_BITBIT(bit)
133
134	/* clear an entire bit map */
135	#define clrbitmap(map) bzero((char *) map, BITMAPBYTES)
136
137
138	/*
139	** Utility macros
140	*/
141
142	/* return number of bytes left in a buffer */
143	#define SPACELEFT(buf, ptr) (sizeof buf - ((ptr) - buf))
144	/*
145	** Address structure.
146	** Addresses are stored internally in this structure.
147	*/
148
149	struct address
150	{
151	char q_paddr; / the printname for the address */
152	char q_user; / user name */
153	char q_ruser; / real user name, or NULL if q_user */
154	char q_host; / host name */
155	struct mailer q_mailer; / mailer to use */
156	u_long q_flags; /* status flags, see below */
157	uid_t q_uid; /* user-id of receiver (if known) */
158	gid_t q_gid; /* group-id of receiver (if known) */
159	char q_home; / home dir (local mailer only) */
160	char q_fullname; / full name if known */
161	struct address q_next; / chain */
162	struct address q_alias; / address this results from */
163	char q_owner; / owner of q_alias */
164	struct address q_tchain; / temporary use chain */
165	char q_orcpt; / ORCPT parameter from RCPT TO: line */
166	char q_status; / status code for DSNs */
167	char q_rstatus; / remote status message for DSNs */
168	time_t q_statdate; /* date of status messages */
169	char q_statmta; / MTA generating q_rstatus */
170	short q_specificity; /* how "specific" this address is */
171	};
172
173	typedef struct address ADDRESS;
174
175	# define QDONTSEND 0x00000001 /* don't send to this address */
176	# define QBADADDR 0x00000002 /* this address is verified bad */
177	# define QGOODUID 0x00000004 /* the q_uid q_gid fields are good */
178	# define QPRIMARY 0x00000008 /* set from RCPT or argv */
179	# define QQUEUEUP 0x00000010 /* queue for later transmission */
180	# define QSENT 0x00000020 /* has been successfully delivered */
181	# define QNOTREMOTE 0x00000040 /* address not for remote forwarding */
182	# define QSELFREF 0x00000080 /* this address references itself */
183	# define QVERIFIED 0x00000100 /* verified, but not expanded */
184	# define QBOGUSSHELL 0x00000400 /* user has no valid shell listed */
185	# define QUNSAFEADDR 0x00000800 /* address aquired via unsafe path */
186	# define QPINGONSUCCESS 0x00001000 /* give return on successful delivery */
187	# define QPINGONFAILURE 0x00002000 /* give return on failure */
188	# define QPINGONDELAY 0x00004000 /* give return on message delay */
189	# define QHASNOTIFY 0x00008000 /* propogate notify parameter */
190	# define QRELAYED 0x00010000 /* DSN: relayed to non-DSN aware sys */
191	# define QEXPANDED 0x00020000 /* DSN: undergone list expansion */
192	# define QDELIVERED 0x00040000 /* DSN: successful final delivery */
193	# define QDELAYED 0x00080000 /* DSN: message delayed */
194	# define QTHISPASS 0x40000000 /* temp: address set this pass */
195	# define QRCPTOK 0x80000000 /* recipient() processed address */
196
197	# define Q_PINGFLAGS (QPINGONSUCCESS\|QPINGONFAILURE\|QPINGONDELAY)
198
199	# define NULLADDR ((ADDRESS *) NULL)
200
201	/* functions */
202	extern ADDRESS parseaddr __P((char , ADDRESS , int, int, char , ENVELOPE ));
203	extern ADDRESS buildaddr __P((char , ADDRESS , int, ENVELOPE *));
204	extern ADDRESS recipient __P((ADDRESS , ADDRESS *, int, ENVELOPE ));
205	extern char *prescan __P((char , int, char[], int, char *, u_char ));
206	extern int rewrite __P((char *, int, int, ENVELOPE ));
207	extern char remotename __P((char , MAILER , int, int , ENVELOPE *));
208	extern ADDRESS getctladdr __P((ADDRESS ));
209	extern bool sameaddr __P((ADDRESS , ADDRESS ));
210	extern bool emptyaddr __P((ADDRESS *));
211	extern void printaddr __P((ADDRESS *, bool));
212	extern void cataddr __P((char , char , char *, int, int));
213	extern int sendtolist __P((char , ADDRESS , ADDRESS *, int, ENVELOPE ));
214	/*
215	** Mailer definition structure.
216	** Every mailer known to the system is declared in this
217	** structure. It defines the pathname of the mailer, some
218	** flags associated with it, and the argument vector to
219	** pass to it. The flags are defined in conf.c
220	**
221	** The argument vector is expanded before actual use. All
222	** words except the first are passed through the macro
223	** processor.
224	*/
225
226	struct mailer
227	{
228	char m_name; / symbolic name of this mailer */
229	char m_mailer; / pathname of the mailer to use */
230	char m_mtatype; / type of this MTA */
231	char m_addrtype; / type for addresses */
232	char m_diagtype; / type for diagnostics */
233	BITMAP m_flags; /* status flags, see below */
234	short m_mno; /* mailer number internally */
235	short m_nice; /* niceness to run at (mostly for prog) */
236	char *m_argv; / template argument vector */
237	short m_sh_rwset; /* rewrite set: sender header addresses */
238	short m_se_rwset; /* rewrite set: sender envelope addresses */
239	short m_rh_rwset; /* rewrite set: recipient header addresses */
240	short m_re_rwset; /* rewrite set: recipient envelope addresses */
241	char m_eol; / end of line string */
242	long m_maxsize; /* size limit on message to this mailer */
243	int m_linelimit; /* max # characters per line */
244	char m_execdir; / directory to chdir to before execv */
245	uid_t m_uid; /* UID to run as */
246	gid_t m_gid; /* GID to run as */
247	char m_defcharset; / default character set */
248	};
249
250	/* bits for m_flags */
251	# define M_ESMTP 'a' /* run Extended SMTP protocol */
252	# define M_ALIASABLE 'A' /* user can be LHS of an alias */
253	# define M_BLANKEND 'b' /* ensure blank line at end of message */
254	# define M_NOCOMMENT 'c' /* don't include comment part of address */
255	# define M_CANONICAL 'C' /* make addresses canonical "u@dom" */
256	# define M_NOBRACKET 'd' /* never angle bracket envelope route-addrs */
257	/* 'D' CF: include Date: */
258	# define M_EXPENSIVE 'e' /* it costs to use this mailer.... */
259	# define M_ESCFROM 'E' /* escape From lines to >From */
260	# define M_FOPT 'f' /* mailer takes picky -f flag */
261	/* 'F' CF: include From: or Resent-From: */
262	# define M_NO_NULL_FROM 'g' /* sender of errors should be $g */
263	# define M_HST_UPPER 'h' /* preserve host case distinction */
264	# define M_PREHEAD 'H' /* MAIL11V3: preview headers */
265	# define M_UDBENVELOPE 'i' /* do udbsender rewriting on envelope */
266	# define M_INTERNAL 'I' /* SMTP to another sendmail site */
267	# define M_UDBRECIPIENT 'j' /* do udbsender rewriting on recipient lines */
268	# define M_NOLOOPCHECK 'k' /* don't check for loops in HELO command */
269	# define M_CHUNKING 'K' /* CHUNKING: reserved for future use */
270	# define M_LOCALMAILER 'l' /* delivery is to this host */
271	# define M_LIMITS 'L' /* must enforce SMTP line limits */
272	# define M_MUSER 'm' /* can handle multiple users at once */
273	/* 'M' CF: include Message-Id: */
274	# define M_NHDR 'n' /* don't insert From line */
275	# define M_MANYSTATUS 'N' /* MAIL11V3: DATA returns multi-status */
276	# define M_RUNASRCPT 'o' /* always run mailer as recipient */
277	# define M_FROMPATH 'p' /* use reverse-path in MAIL FROM: */
278	/* 'P' CF: include Return-Path: */
279	# define M_VRFY250 'q' /* VRFY command returns 250 instead of 252 */
280	# define M_ROPT 'r' /* mailer takes picky -r flag */
281	# define M_SECURE_PORT 'R' /* try to send on a reserved TCP port */
282	# define M_STRIPQ 's' /* strip quote chars from user/host */
283	# define M_SPECIFIC_UID 'S' /* run as specific uid/gid */
284	# define M_USR_UPPER 'u' /* preserve user case distinction */
285	# define M_UGLYUUCP 'U' /* this wants an ugly UUCP from line */
286	# define M_CONTENT_LEN 'v' /* add Content-Length: header (SVr4) */
287	/* 'V' UIUC: !-relativize all addresses */
288	# define M_HASPWENT 'w' /* check for /etc/passwd entry */
289	/* 'x' CF: include Full-Name: */
290	# define M_XDOT 'X' /* use hidden-dot algorithm */
291	# define M_LMTP 'z' /* run Local Mail Transport Protocol */
292	# define M_NOMX '0' /* turn off MX lookups */
293	# define M_NONULLS '1' /* don't send null bytes */
294	# define M_EBCDIC '3' /* extend Q-P encoding for EBCDIC */
295	# define M_TRYRULESET5 '5' /* use ruleset 5 after local aliasing */
296	# define M_7BITHDRS '6' /* strip headers to 7 bits even in 8 bit path */
297	# define M_7BITS '7' /* use 7-bit path */
298	# define M_8BITS '8' /* force "just send 8" behaviour */
299	# define M_MAKE8BIT '9' /* convert 7 -> 8 bit if appropriate */
300	# define M_CHECKINCLUDE ':' /* check for :include: files */
301	# define M_CHECKPROG '\|' /* check for \|program addresses */
302	# define M_CHECKFILE '/' /* check for /file addresses */
303	# define M_CHECKUDB '@' /* user can be user database key */
304	# define M_CHECKHDIR '~' /* SGI: check for valid home directory */
305
306	EXTERN MAILER *Mailer[MAXMAILERS+1];
307
308	EXTERN MAILER LocalMailer; / ptr to local mailer */
309	EXTERN MAILER ProgMailer; / ptr to program mailer */
310	EXTERN MAILER FileMailer; / ptr to file mailer */
311	EXTERN MAILER InclMailer; / ptr to include mailer */
312	/*
313	** Information about currently open connections to mailers, or to
314	** hosts that we have looked up recently.
315	*/
316
317	# define MCI struct mailer_con_info
318
319	MCI
320	{
321	short mci_flags; /* flag bits, see below */
322	short mci_errno; /* error number on last connection */
323	short mci_herrno; /* h_errno from last DNS lookup */
324	short mci_exitstat; /* exit status from last connection */
325	short mci_state; /* SMTP state */
326	off_t mci_contentlen; /* body length for Content-Length: */
327	long mci_maxsize; /* max size this server will accept */
328	FILE mci_in; / input side of connection */
329	FILE mci_out; / output side of connection */
330	pid_t mci_pid; /* process id of subordinate proc */
331	char mci_phase; / SMTP phase string */
332	struct mailer mci_mailer; / ptr to the mailer for this conn */
333	char mci_host; / host name */
334	char mci_status; / DSN status to be copied to addrs */
335	char mci_rstatus; / SMTP status to be copied to addrs */
336	time_t mci_lastuse; /* last usage time */
337	FILE mci_statfile; / long term status file */
338	};
339
340
341	/* flag bits */
342	#define MCIF_VALID 0x0001 /* this entry is valid */
343	#define MCIF_TEMP 0x0002 /* don't cache this connection */
344	#define MCIF_CACHED 0x0004 /* currently in open cache */
345	#define MCIF_ESMTP 0x0008 /* this host speaks ESMTP */
346	#define MCIF_EXPN 0x0010 /* EXPN command supported */
347	#define MCIF_SIZE 0x0020 /* SIZE option supported */
348	#define MCIF_8BITMIME 0x0040 /* BODY=8BITMIME supported */
349	#define MCIF_7BIT 0x0080 /* strip this message to 7 bits */
350	#define MCIF_MULTSTAT 0x0100 /* MAIL11V3: handles MULT status */
351	#define MCIF_INHEADER 0x0200 /* currently outputing header */
352	#define MCIF_CVT8TO7 0x0400 /* convert from 8 to 7 bits */
353	#define MCIF_DSN 0x0800 /* DSN extension supported */
354	#define MCIF_8BITOK 0x1000 /* OK to send 8 bit characters */
355	#define MCIF_CVT7TO8 0x2000 /* convert from 7 to 8 bits */
356	#define MCIF_INMIME 0x4000 /* currently reading MIME header */
357
358	/* states */
359	#define MCIS_CLOSED 0 /* no traffic on this connection */
360	#define MCIS_OPENING 1 /* sending initial protocol */
361	#define MCIS_OPEN 2 /* open, initial protocol sent */
362	#define MCIS_ACTIVE 3 /* message being sent */
363	#define MCIS_QUITING 4 /* running quit protocol */
364	#define MCIS_SSD 5 /* service shutting down */
365	#define MCIS_ERROR 6 /* I/O error on connection */
366
367	/* functions */
368	extern MCI mci_get __P((char , MAILER *));
369	extern void mci_cache __P((MCI *));
370	extern void mci_flush __P((bool, MCI *));
371	extern void mci_dump __P((MCI *, bool));
372	extern void mci_dump_all __P((bool));
373	extern MCI *mci_scan __P((MCI ));
374	extern int mci_traverse_persistent __P((int ()(), char ));
375	extern int mci_print_persistent __P((char , char ));
376	extern int mci_purge_persistent __P((char , char ));
377	extern int mci_lock_host __P((MCI *));
378	extern void mci_unlock_host __P((MCI *));
379	extern int mci_lock_host_statfile __P((MCI *));
380	extern void mci_store_persistent __P((MCI *));
381	extern int mci_read_persistent __P((FILE , MCI ));
382	/*
383	** Header structure.
384	** This structure is used internally to store header items.
385	*/
386
387	struct header
388	{
389	char h_field; / the name of the field */
390	char h_value; / the value of that field */
391	struct header h_link; / the next header */
392	u_short h_flags; /* status bits, see below */
393	BITMAP h_mflags; /* m_flags bits needed */
394	};
395
396	typedef struct header HDR;
397
398	/*
399	** Header information structure.
400	** Defined in conf.c, this struct declares the header fields
401	** that have some magic meaning.
402	*/
403
404	struct hdrinfo
405	{
406	char hi_field; / the name of the field */
407	u_short hi_flags; /* status bits, see below */
408	char hi_ruleset; / validity check ruleset */
409	};
410
411	extern struct hdrinfo HdrInfo[];
412
413	/* bits for h_flags and hi_flags */
414	# define H_EOH 0x0001 /* this field terminates header */
415	# define H_RCPT 0x0002 /* contains recipient addresses */
416	# define H_DEFAULT 0x0004 /* if another value is found, drop this */
417	# define H_RESENT 0x0008 /* this address is a "Resent-..." address */
418	# define H_CHECK 0x0010 /* check h_mflags against m_flags */
419	# define H_ACHECK 0x0020 /* ditto, but always (not just default) */
420	# define H_FORCE 0x0040 /* force this field, even if default */
421	# define H_TRACE 0x0080 /* this field contains trace information */
422	# define H_FROM 0x0100 /* this is a from-type field */
423	# define H_VALID 0x0200 /* this field has a validated value */
424	# define H_RECEIPTTO 0x0400 /* this field has return receipt info */
425	# define H_ERRORSTO 0x0800 /* this field has error address info */
426	# define H_CTE 0x1000 /* this field is a content-transfer-encoding */
427	# define H_CTYPE 0x2000 /* this is a content-type field */
428	# define H_BCC 0x4000 /* Bcc: header: strip value or delete */
429	# define H_ENCODABLE 0x8000 /* field can be RFC 1522 encoded */
430
431	/* functions */
432	extern void addheader __P((char , char , HDR **));
433	extern char hvalue __P((char , HDR *));
434	extern void commaize __P((HDR , char , bool, MCI , ENVELOPE ));
435	extern void put_vanilla_header __P((HDR , char , MCI *));
436	extern void eatheader __P((ENVELOPE *, bool));
437	extern int chompheader __P((char , bool, HDR , ENVELOPE ));
438	/*
439	** Envelope structure.
440	** This structure defines the message itself. There is usually
441	** only one of these -- for the message that we originally read
442	** and which is our primary interest -- but other envelopes can
443	** be generated during processing. For example, error messages
444	** will have their own envelope.
445	*/
446
447	struct envelope
448	{
449	HDR e_header; / head of header list */
450	long e_msgpriority; /* adjusted priority of this message */
451	time_t e_ctime; /* time message appeared in the queue */
452	char e_to; / the target person */
453	ADDRESS e_from; /* the person it is from */
454	char e_sender; / e_from.q_paddr w comments stripped */
455	char *e_fromdomain; / the domain part of the sender */
456	ADDRESS e_sendqueue; / list of message recipients */
457	ADDRESS e_errorqueue; / the queue for error responses */
458	long e_msgsize; /* size of the message in bytes */
459	long e_flags; /* flags, see below */
460	int e_nrcpts; /* number of recipients */
461	short e_class; /* msg class (priority, junk, etc.) */
462	short e_hopcount; /* number of times processed */
463	short e_nsent; /* number of sends since checkpoint */
464	short e_sendmode; /* message send mode */
465	short e_errormode; /* error return mode */
466	short e_timeoutclass; /* message timeout class */
467	void (e_puthdr)__P((MCI , HDR , ENVELOPE , int));
468	/* function to put header of message */
469	void (e_putbody)__P((MCI , ENVELOPE , char ));
470	/* function to put body of message */
471	struct envelope e_parent; / the message this one encloses */
472	struct envelope e_sibling; / the next envelope of interest */
473	char e_bodytype; / type of message body */
474	FILE e_dfp; / temporary file */
475	char e_id; / code for this entry in queue */
476	FILE e_xfp; / transcript file */
477	FILE e_lockfp; / the lock file for this message */
478	char e_message; / error message */
479	char e_statmsg; / stat msg (changes per delivery) */
480	char e_msgboundary; / MIME-style message part boundary */
481	char e_origrcpt; / original recipient (one only) */
482	char e_envid; / envelope id from MAIL FROM: line */
483	char e_status; / DSN status for this message */
484	time_t e_dtime; /* time of last delivery attempt */
485	int e_ntries; /* number of delivery attempts */
486	dev_t e_dfdev; /* df file's device, for crash recov */
487	ino_t e_dfino; /* df file's ino, for crash recovery */
488	char e_macro[256]; / macro definitions */
489	};
490
491	/* values for e_flags */
492	#define EF_OLDSTYLE 0x0000001 /* use spaces (not commas) in hdrs */
493	#define EF_INQUEUE 0x0000002 /* this message is fully queued */
494	#define EF_NO_BODY_RETN 0x0000004 /* omit message body on error */
495	#define EF_CLRQUEUE 0x0000008 /* disk copy is no longer needed */
496	#define EF_SENDRECEIPT 0x0000010 /* send a return receipt */
497	#define EF_FATALERRS 0x0000020 /* fatal errors occured */
498	#define EF_DELETE_BCC 0x0000040 /* delete Bcc: headers entirely */
499	#define EF_RESPONSE 0x0000080 /* this is an error or return receipt */
500	#define EF_RESENT 0x0000100 /* this message is being forwarded */
501	#define EF_VRFYONLY 0x0000200 /* verify only (don't expand aliases) */
502	#define EF_WARNING 0x0000400 /* warning message has been sent */
503	#define EF_QUEUERUN 0x0000800 /* this envelope is from queue */
504	#define EF_GLOBALERRS 0x0001000 /* treat errors as global */
505	#define EF_PM_NOTIFY 0x0002000 /* send return mail to postmaster */
506	#define EF_METOO 0x0004000 /* send to me too */
507	#define EF_LOGSENDER 0x0008000 /* need to log the sender */
508	#define EF_NORECEIPT 0x0010000 /* suppress all return-receipts */
509	#define EF_HAS8BIT 0x0020000 /* at least one 8-bit char in body */
510	#define EF_NL_NOT_EOL 0x0040000 /* don't accept raw NL as EOLine */
511	#define EF_CRLF_NOT_EOL 0x0080000 /* don't accept CR-LF as EOLine */
512	#define EF_RET_PARAM 0x0100000 /* RCPT command had RET argument */
513	#define EF_HAS_DF 0x0200000 /* set when df file is instantiated */
514	#define EF_IS_MIME 0x0400000 /* really is a MIME message */
515	#define EF_DONT_MIME 0x0800000 /* never MIME this message */
516	#define EF_DISCARD 0x1000000 /* discard the message */
517
518	EXTERN ENVELOPE CurEnv; / envelope currently being processed */
519
520	/* functions */
521	extern ENVELOPE newenvelope __P((ENVELOPE , ENVELOPE *));
522	extern void dropenvelope __P((ENVELOPE *, bool));
523	extern void clearenvelope __P((ENVELOPE *, bool));
524
525	extern void putheader __P((MCI , HDR , ENVELOPE *, int));
526	extern void putbody __P((MCI , ENVELOPE , char *));
527	/*
528	** Message priority classes.
529	**
530	** The message class is read directly from the Priority: header
531	** field in the message.
532	**
533	** CurEnv->e_msgpriority is the number of bytes in the message plus
534	** the creation time (so that jobs ``tend'' to be ordered correctly),
535	** adjusted by the message class, the number of recipients, and the
536	** amount of time the message has been sitting around. This number
537	** is used to order the queue. Higher values mean LOWER priority.
538	**
539	** Each priority class point is worth WkClassFact priority points;
540	** each recipient is worth WkRecipFact priority points. Each time
541	** we reprocess a message the priority is adjusted by WkTimeFact.
542	** WkTimeFact should normally decrease the priority so that jobs
543	** that have historically failed will be run later; thanks go to
544	** Jay Lepreau at Utah for pointing out the error in my thinking.
545	**
546	** The "class" is this number, unadjusted by the age or size of
547	** this message. Classes with negative representations will have
548	** error messages thrown away if they are not local.
549	*/
550
551	struct priority
552	{
553	char pri_name; / external name of priority */
554	int pri_val; /* internal value for same */
555	};
556
557	EXTERN struct priority Priorities[MAXPRIORITIES];
558	EXTERN int NumPriorities; /* pointer into Priorities */
559	/*
560	** Rewrite rules.
561	*/
562
563	struct rewrite
564	{
565	char *r_lhs; / pattern match */
566	char *r_rhs; / substitution value */
567	struct rewrite r_next;/ next in chain */
568	};
569
570	EXTERN struct rewrite *RewriteRules[MAXRWSETS];
571
572	/*
573	** Special characters in rewriting rules.
574	** These are used internally only.
575	** The COND* rules are actually used in macros rather than in
576	** rewriting rules, but are given here because they
577	** cannot conflict.
578	*/
579
580	/* left hand side items */
581	# define MATCHZANY ((u_char)0220) /* match zero or more tokens */
582	# define MATCHANY ((u_char)0221) /* match one or more tokens */
583	# define MATCHONE ((u_char)0222) /* match exactly one token */
584	# define MATCHCLASS ((u_char)0223) /* match one token in a class */
585	# define MATCHNCLASS ((u_char)0224) /* match anything not in class */
586	# define MATCHREPL ((u_char)0225) /* replacement on RHS for above */
587
588	/* right hand side items */
589	# define CANONNET ((u_char)0226) /* canonical net, next token */
590	# define CANONHOST ((u_char)0227) /* canonical host, next token */
591	# define CANONUSER ((u_char)0230) /* canonical user, next N tokens */
592	# define CALLSUBR ((u_char)0231) /* call another rewriting set */
593
594	/* conditionals in macros */
595	# define CONDIF ((u_char)0232) /* conditional if-then */
596	# define CONDELSE ((u_char)0233) /* conditional else */
597	# define CONDFI ((u_char)0234) /* conditional fi */
598
599	/* bracket characters for host name lookup */
600	# define HOSTBEGIN ((u_char)0235) /* hostname lookup begin */
601	# define HOSTEND ((u_char)0236) /* hostname lookup end */
602
603	/* bracket characters for generalized lookup */
604	# define LOOKUPBEGIN ((u_char)0205) /* generalized lookup begin */
605	# define LOOKUPEND ((u_char)0206) /* generalized lookup end */
606
607	/* macro substitution character */
608	# define MACROEXPAND ((u_char)0201) /* macro expansion */
609	# define MACRODEXPAND ((u_char)0202) /* deferred macro expansion */
610
611	/* to make the code clearer */
612	# define MATCHZERO CANONHOST
613
614	/* external <==> internal mapping table */
615	struct metamac
616	{
617	char metaname; /* external code (after $) */
618	u_char metaval; /* internal code (as above) */
619	};
620
621	/* values for macros with external names only */
622	# define MID_OPMODE 0202 /* operation mode */
623
624	/* functions */
625	extern void expand __P((char , char , size_t, ENVELOPE *));
626	extern void define __P((int, char , ENVELOPE ));
627	extern char macvalue __P((int, ENVELOPE ));
628	extern char *macname __P((int));
629	extern int macid __P((char , char *));
630	/*
631	** Name canonification short circuit.
632	**
633	** If the name server for a host is down, the process of trying to
634	** canonify the name can hang. This is similar to (but alas, not
635	** identical to) looking up the name for delivery. This stab type
636	** caches the result of the name server lookup so we don't hang
637	** multiple times.
638	*/
639
640	#define NAMECANON struct _namecanon
641
642	NAMECANON
643	{
644	short nc_errno; /* cached errno */
645	short nc_herrno; /* cached h_errno */
646	short nc_stat; /* cached exit status code */
647	short nc_flags; /* flag bits */
648	char nc_cname; / the canonical name */
649	};
650
651	/* values for nc_flags */
652	#define NCF_VALID 0x0001 /* entry valid */
653	/*
654	** Mapping functions
655	**
656	** These allow arbitrary mappings in the config file. The idea
657	** (albeit not the implementation) comes from IDA sendmail.
658	*/
659
660	# define MAPCLASS struct _mapclass
661	# define MAP struct _map
662	# define MAXMAPACTIONS 3 /* size of map_actions array */
663
664
665	/*
666	** An actual map.
667	*/
668
669	MAP
670	{
671	MAPCLASS map_class; / the class of this map */
672	char map_mname; / name of this map */
673	long map_mflags; /* flags, see below */
674	char map_file; / the (nominal) filename */
675	ARBPTR_T map_db1; /* the open database ptr */
676	ARBPTR_T map_db2; /* an "extra" database pointer */
677	char map_keycolnm; / key column name */
678	char map_valcolnm; / value column name */
679	u_char map_keycolno; /* key column number */
680	u_char map_valcolno; /* value column number */
681	char map_coldelim; /* column delimiter */
682	char map_app; / to append to successful matches */
683	char map_tapp; / to append to "tempfail" matches */
684	char map_domain; / the (nominal) NIS domain */
685	char map_rebuild; / program to run to do auto-rebuild */
686	time_t map_mtime; /* last database modification time */
687	pid_t map_pid; /* PID of process which opened map */
688	int map_lockfd; /* auxiliary lock file descriptor */
689	short map_specificity; /* specificity of aliases */
690	MAP map_stack[MAXMAPSTACK]; / list for stacked maps */
691	short map_return[MAXMAPACTIONS]; /* return bitmaps for stacked maps */
692	};
693
694	/* bit values for map_mflags */
695	# define MF_VALID 0x00000001 /* this entry is valid */
696	# define MF_INCLNULL 0x00000002 /* include null byte in key */
697	# define MF_OPTIONAL 0x00000004 /* don't complain if map not found */
698	# define MF_NOFOLDCASE 0x00000008 /* don't fold case in keys */
699	# define MF_MATCHONLY 0x00000010 /* don't use the map value */
700	# define MF_OPEN 0x00000020 /* this entry is open */
701	# define MF_WRITABLE 0x00000040 /* open for writing */
702	# define MF_ALIAS 0x00000080 /* this is an alias file */
703	# define MF_TRY0NULL 0x00000100 /* try with no null byte */
704	# define MF_TRY1NULL 0x00000200 /* try with the null byte */
705	# define MF_LOCKED 0x00000400 /* this map is currently locked */
706	# define MF_ALIASWAIT 0x00000800 /* alias map in aliaswait state */
707	# define MF_IMPL_HASH 0x00001000 /* implicit: underlying hash database */
708	# define MF_IMPL_NDBM 0x00002000 /* implicit: underlying NDBM database */
709	# define MF_UNSAFEDB 0x00004000 /* this map is world writable */
710	# define MF_APPEND 0x00008000 /* append new entry on rebuiled */
711	# define MF_KEEPQUOTES 0x00010000 /* don't dequote key before lookup */
712	# define MF_NODEFER 0x00020000 /* don't defer if map lookup fails */
713	# define MF_REGEX_NOT 0x00040000 /* regular expression negation */
714
715	/* indices for map_actions */
716	# define MA_NOTFOUND 0 /* member map returned "not found" */
717	# define MA_UNAVAIL 1 /* member map is not available */
718	# define MA_TRYAGAIN 2 /* member map returns temp failure */
719
720	/*
721	** The class of a map -- essentially the functions to call
722	*/
723
724	MAPCLASS
725	{
726	char map_cname; / name of this map class */
727	char map_ext; / extension for database file */
728	short map_cflags; /* flag bits, see below */
729	bool (map_parse)__P((MAP , char *));
730	/* argument parsing function */
731	char (map_lookup)__P((MAP , char , char *, int ));
732	/* lookup function */
733	void (map_store)__P((MAP , char , char ));
734	/* store function */
735	bool (map_open)__P((MAP , int));
736	/* open function */
737	void (map_close)__P((MAP ));
738	/* close function */
739	};
740
741	/* bit values for map_cflags */
742	#define MCF_ALIASOK 0x0001 /* can be used for aliases */
743	#define MCF_ALIASONLY 0x0002 /* usable only for aliases */
744	#define MCF_REBUILDABLE 0x0004 /* can rebuild alias files */
745	#define MCF_OPTFILE 0x0008 /* file name is optional */
746
747	/* functions */
748	extern char map_rewrite __P((MAP , const char , size_t, char *));
749	extern MAP makemapentry __P((char ));
750	extern void initmaps __P((bool, ENVELOPE *));
751	/*
752	** Symbol table definitions
753	*/
754
755	struct symtab
756	{
757	char s_name; / name to be entered */
758	short s_type; /* general type (see below) */
759	short s_len; /* length of this entry */
760	struct symtab s_next; / pointer to next in chain */
761	union
762	{
763	BITMAP sv_class; /* bit-map of word classes */
764	ADDRESS sv_addr; / pointer to address header */
765	MAILER sv_mailer; / pointer to mailer */
766	char sv_alias; / alias */
767	MAPCLASS sv_mapclass; /* mapping function class */
768	MAP sv_map; /* mapping function */
769	char sv_hostsig; / host signature */
770	MCI sv_mci; /* mailer connection info */
771	NAMECANON sv_namecanon; /* canonical name cache */
772	int sv_macro; /* macro name => id mapping */
773	int sv_ruleset; /* ruleset index */
774	struct hdrinfo sv_header; /* header metainfo */
775	char sv_service[MAXMAPSTACK]; / service switch */
776	} s_value;
777	};
778
779	typedef struct symtab STAB;
780
781	/* symbol types */
782	# define ST_UNDEF 0 /* undefined type */
783	# define ST_CLASS 1 /* class map */
784	# define ST_ADDRESS 2 /* an address in parsed format */
785	# define ST_MAILER 3 /* a mailer header */
786	# define ST_ALIAS 4 /* an alias */
787	# define ST_MAPCLASS 5 /* mapping function class */
788	# define ST_MAP 6 /* mapping function */
789	# define ST_HOSTSIG 7 /* host signature */
790	# define ST_NAMECANON 8 /* cached canonical name */
791	# define ST_MACRO 9 /* macro name to id mapping */
792	# define ST_RULESET 10 /* ruleset index */
793	# define ST_SERVICE 11 /* service switch entry */
794	# define ST_HEADER 12 /* special header flags */
795	# define ST_MCI 16 /* mailer connection info (offset) */
796
797	# define s_class s_value.sv_class
798	# define s_address s_value.sv_addr
799	# define s_mailer s_value.sv_mailer
800	# define s_alias s_value.sv_alias
801	# define s_mci s_value.sv_mci
802	# define s_mapclass s_value.sv_mapclass
803	# define s_hostsig s_value.sv_hostsig
804	# define s_map s_value.sv_map
805	# define s_namecanon s_value.sv_namecanon
806	# define s_macro s_value.sv_macro
807	# define s_ruleset s_value.sv_ruleset
808	# define s_service s_value.sv_service
809	# define s_header s_value.sv_header
810
811	extern STAB stab __P((char , int, int));
812	extern void stabapply __P((void ()(STAB , int), int));
813
814	/* opcodes to stab */
815	# define ST_FIND 0 /* find entry */
816	# define ST_ENTER 1 /* enter if not there */
817	/*
818	** STRUCT EVENT -- event queue.
819	**
820	** Maintained in sorted order.
821	**
822	** We store the pid of the process that set this event to insure
823	** that when we fork we will not take events intended for the parent.
824	*/
825
826	struct event
827	{
828	time_t ev_time; /* time of the function call */
829	void (*ev_func)__P((int));
830	/* function to call */
831	int ev_arg; /* argument to ev_func */
832	int ev_pid; /* pid that set this event */
833	struct event ev_link; / link to next item */
834	};
835
836	typedef struct event EVENT;
837
838	EXTERN EVENT EventQueue; / head of event queue */
839
840	/* functions */
841	extern EVENT setevent __P((time_t, void()(), int));
842	extern void clrevent __P((EVENT *));
843	/*
844	** Operation, send, error, and MIME modes
845	**
846	** The operation mode describes the basic operation of sendmail.
847	** This can be set from the command line, and is "send mail" by
848	** default.
849	**
850	** The send mode tells how to send mail. It can be set in the
851	** configuration file. It's setting determines how quickly the
852	** mail will be delivered versus the load on your system. If the
853	** -v (verbose) flag is given, it will be forced to SM_DELIVER
854	** mode.
855	**
856	** The error mode tells how to return errors.
857	*/
858
859	EXTERN char OpMode; /* operation mode, see below */
860
861	#define MD_DELIVER 'm' /* be a mail sender */
862	#define MD_SMTP 's' /* run SMTP on standard input */
863	#define MD_ARPAFTP 'a' /* obsolete ARPANET mode (Grey Book) */
864	#define MD_DAEMON 'd' /* run as a daemon */
865	#define MD_FGDAEMON 'D' /* run daemon in foreground */
866	#define MD_VERIFY 'v' /* verify: don't collect or deliver */
867	#define MD_TEST 't' /* test mode: resolve addrs only */
868	#define MD_INITALIAS 'i' /* initialize alias database */
869	#define MD_PRINT 'p' /* print the queue */
870	#define MD_FREEZE 'z' /* freeze the configuration file */
871	#define MD_HOSTSTAT 'h' /* print persistent host stat info */
872	#define MD_PURGESTAT 'H' /* purge persistent host stat info */
873
874	/* values for e_sendmode -- send modes */
875	#define SM_DELIVER 'i' /* interactive delivery */
876	#define SM_FORK 'b' /* deliver in background */
877	#define SM_QUEUE 'q' /* queue, don't deliver */
878	#define SM_DEFER 'd' /* defer map lookups as well as queue */
879	#define SM_VERIFY 'v' /* verify only (used internally) */
880
881	/* used only as a parameter to sendall */
882	#define SM_DEFAULT '\0' /* unspecified, use SendMode */
883
884
885	/* values for e_errormode -- error handling modes */
886	#define EM_PRINT 'p' /* print errors */
887	#define EM_MAIL 'm' /* mail back errors */
888	#define EM_WRITE 'w' /* write back errors */
889	#define EM_BERKNET 'e' /* special berknet processing */
890	#define EM_QUIET 'q' /* don't print messages (stat only) */
891
892
893	/* MIME processing mode */
894	EXTERN int MimeMode;
895
896	/* bit values for MimeMode */
897	#define MM_CVTMIME 0x0001 /* convert 8 to 7 bit MIME */
898	#define MM_PASS8BIT 0x0002 /* just send 8 bit data blind */
899	#define MM_MIME8BIT 0x0004 /* convert 8-bit data to MIME */
900
901	/* queue sorting order algorithm */
902	EXTERN int QueueSortOrder;
903
904	#define QS_BYPRIORITY 0 /* sort by message priority */
905	#define QS_BYHOST 1 /* sort by first host name */
906	#define QS_BYTIME 2 /* sort by submission time */
907
908
909	/* how to handle messages without any recipient addresses */
910	EXTERN int NoRecipientAction;
911
912	#define NRA_NO_ACTION 0 /* just leave it as is */
913	#define NRA_ADD_TO 1 /* add To: header */
914	#define NRA_ADD_APPARENTLY_TO 2 /* add Apparently-To: header */
915	#define NRA_ADD_BCC 3 /* add empty Bcc: header */
916	#define NRA_ADD_TO_UNDISCLOSED 4 /* add To: undisclosed:; header */
917
918
919	/* flags to putxline */
920	#define PXLF_NOTHINGSPECIAL 0 /* no special mapping */
921	#define PXLF_MAPFROM 0x0001 /* map From_ to >From_ */
922	#define PXLF_STRIP8BIT 0x0002 /* strip 8th bit */
923	#define PXLF_HEADER 0x0004 /* map newlines in headers */
924	/*
925	** Additional definitions
926	*/
927
928
929	/*
930	** Privacy flags
931	** These are bit values for the PrivacyFlags word.
932	*/
933
934	#define PRIV_PUBLIC 0 /* what have I got to hide? */
935	#define PRIV_NEEDMAILHELO 0x0001 /* insist on HELO for MAIL, at least */
936	#define PRIV_NEEDEXPNHELO 0x0002 /* insist on HELO for EXPN */
937	#define PRIV_NEEDVRFYHELO 0x0004 /* insist on HELO for VRFY */
938	#define PRIV_NOEXPN 0x0008 /* disallow EXPN command entirely */
939	#define PRIV_NOVRFY 0x0010 /* disallow VRFY command entirely */
940	#define PRIV_AUTHWARNINGS 0x0020 /* flag possible authorization probs */
941	#define PRIV_NORECEIPTS 0x0040 /* disallow return receipts */
942	#define PRIV_NOETRN 0x0080 /* disallow ETRN command entirely */
943	#define PRIV_NOVERB 0x0100 /* disallow VERB command entirely */
944	#define PRIV_RESTRICTMAILQ 0x1000 /* restrict mailq command */
945	#define PRIV_RESTRICTQRUN 0x2000 /* restrict queue run */
946	#define PRIV_GOAWAY 0x0fff /* don't give no info, anyway, anyhow */
947
948	/* struct defining such things */
949	struct prival
950	{
951	char pv_name; / name of privacy flag */
952	int pv_flag; /* numeric level */
953	};
954
955
956	/*
957	** Flags passed to remotename, parseaddr, allocaddr, and buildaddr.
958	*/
959
960	#define RF_SENDERADDR 0x001 /* this is a sender address */
961	#define RF_HEADERADDR 0x002 /* this is a header address */
962	#define RF_CANONICAL 0x004 /* strip comment information */
963	#define RF_ADDDOMAIN 0x008 /* OK to do domain extension */
964	#define RF_COPYPARSE 0x010 /* copy parsed user & host */
965	#define RF_COPYPADDR 0x020 /* copy print address */
966	#define RF_COPYALL (RF_COPYPARSE\|RF_COPYPADDR)
967	#define RF_COPYNONE 0
968
969
970	/*
971	** Flags passed to safefile/safedirpath.
972	*/
973
974	#define SFF_ANYFILE 0 /* no special restrictions */
975	#define SFF_MUSTOWN 0x0001 /* user must own this file */
976	#define SFF_NOSLINK 0x0002 /* file cannot be a symbolic link */
977	#define SFF_ROOTOK 0x0004 /* ok for root to own this file */
978	#define SFF_RUNASREALUID 0x0008 /* if no ctladdr, run as real uid */
979	#define SFF_NOPATHCHECK 0x0010 /* don't bother checking dir path */
980	#define SFF_SETUIDOK 0x0020 /* setuid files are ok */
981	#define SFF_CREAT 0x0040 /* ok to create file if necessary */
982	#define SFF_REGONLY 0x0080 /* regular files only */
983	#define SFF_SAFEDIRPATH 0x0100 /* no writable directories allowed */
984	#define SFF_NOHLINK 0x0200 /* file cannot have hard links */
985	#define SFF_NOWLINK 0x0400 /* links only in non-writable dirs */
986	#define SFF_NOGWFILES 0x0800 /* disallow world writable files */
987	#define SFF_NOWWFILES 0x1000 /* disallow group writable files */
988
989	/* flags that are actually specific to safeopen/safefopen/dfopen */
990	#define SFF_OPENASROOT 0x2000 /* open as root instead of real user */
991	#define SFF_NOLOCK 0x4000 /* don't lock the file */
992
993	/* pseudo-flags */
994	#define SFF_NOLINK (SFF_NOHLINK\|SFF_NOSLINK)
995
996	/* functions */
997	extern int safefile __P((char , UID_T, GID_T, char , int, int, struct stat *));
998	extern int safedirpath __P((char , UID_T, GID_T, char , int));
999	extern int safeopen __P((char *, int, int, int));
1000	extern FILE safefopen __P((char , int, int, int));
1001	extern int dfopen __P((char *, int, int, int));
1002	extern bool filechanged __P((char , int, struct stat ));
1003
1004
1005	/*
1006	** Flags passed to mime8to7.
1007	*/
1008
1009	#define M87F_OUTER 0 /* outer context */
1010	#define M87F_NO8BIT 0x0001 /* can't have 8-bit in this section */
1011	#define M87F_DIGEST 0x0002 /* processing multipart/digest */
1012	#define M87F_NO8TO7 0x0004 /* don't do 8->7 bit conversions */
1013
1014
1015	/*
1016	** Flags passed to returntosender.
1017	*/
1018
1019	#define RTSF_NO_BODY 0 /* send headers only */
1020	#define RTSF_SEND_BODY 0x0001 /* include body of message in return */
1021	#define RTSF_PM_BOUNCE 0x0002 /* this is a postmaster bounce */
1022
1023
1024	/*
1025	** Regular UNIX sockaddrs are too small to handle ISO addresses, so
1026	** we are forced to declare a supertype here.
1027	*/
1028
1029	# if NETINET \|\| NETUNIX \|\| NETISO \|\| NETNS \|\| NETX25
1030	union bigsockaddr
1031	{
1032	struct sockaddr sa; /* general version */
1033	#if NETUNIX
1034	struct sockaddr_un sunix; /* UNIX family */
1035	#endif
1036	#if NETINET
1037	struct sockaddr_in sin; /* INET family */
1038	#endif
1039	#if NETISO
1040	struct sockaddr_iso siso; /* ISO family */
1041	#endif
1042	#if NETNS
1043	struct sockaddr_ns sns; /* XNS family */
1044	#endif
1045	#if NETX25
1046	struct sockaddr_x25 sx25; /* X.25 family */
1047	#endif
1048	};
1049
1050	#define SOCKADDR union bigsockaddr
1051
1052	EXTERN SOCKADDR RealHostAddr; /* address of host we are talking to */
1053
1054	extern char hostnamebyanyaddr __P((SOCKADDR ));
1055	extern char anynet_ntoa __P((SOCKADDR ));
1056	# if DAEMON
1057	extern char validate_connection __P((SOCKADDR , char , ENVELOPE ));
1058	# endif
1059
1060	#endif
1061
1062
1063	/*
1064	** Vendor codes
1065	**
1066	** Vendors can customize sendmail to add special behaviour,
1067	** generally for back compatibility. Ideally, this should
1068	** be set up in the .cf file using the "V" command. However,
1069	** it's quite reasonable for some vendors to want the default
1070	** be their old version; this can be set using
1071	** -DVENDOR_DEFAULT=VENDOR_xxx
1072	** in the Makefile.
1073	**
1074	** Vendors should apply to sendmail@CS.Berkeley.EDU for
1075	** unique vendor codes.
1076	*/
1077
1078	#define VENDOR_BERKELEY 1 /* Berkeley-native configuration file */
1079	#define VENDOR_SUN 2 /* Sun-native configuration file */
1080	#define VENDOR_HP 3 /* Hewlett-Packard specific config syntax */
1081	#define VENDOR_IBM 4 /* IBM specific config syntax */
1082	#define VENDOR_SENDMAIL 5 /* Sendmail, Inc. specific config syntax */
1083
1084	EXTERN int VendorCode; /* vendor-specific operation enhancements */
1085
1086	/* prototypes for vendor-specific hook routines */
1087	extern void vendor_set_uid __P((UID_T));
1088	extern void vendor_daemon_setup __P((ENVELOPE *));
1089
1090	/*
1091	** DontBlameSendmail options
1092	**
1093	** Hopefully nobody uses these.
1094	*/
1095	#define DBS_SAFE 0
1096	#define DBS_ASSUMESAFECHOWN 0x00000001
1097	#define DBS_GROUPWRITABLEDIRPATHSAFE 0x00000002
1098	#define DBS_GROUPWRITABLEFORWARDFILESAFE 0x00000004
1099	#define DBS_GROUPWRITABLEINCLUDEFILESAFE 0x00000008
1100	#define DBS_GROUPWRITABLEALIASFILE 0x00000010
1101	#define DBS_WORLDWRITABLEALIASFILE 0x00000020
1102	#define DBS_FORWARDFILEINUNSAFEDIRPATH 0x00000040
1103	#define DBS_MAPINUNSAFEDIRPATH 0x00000080
1104	#define DBS_LINKEDALIASFILEINWRITABLEDIR 0x00000100
1105	#define DBS_LINKEDCLASSFILEINWRITABLEDIR 0x00000200
1106	#define DBS_LINKEDFORWARDFILEINWRITABLEDIR 0x00000400
1107	#define DBS_LINKEDINCLUDEFILEINWRITABLEDIR 0x00000800
1108	#define DBS_LINKEDMAPINWRITABLEDIR 0x00001000
1109	#define DBS_LINKEDSERVICESWITCHFILEINWRITABLEDIR 0x00002000
1110	#define DBS_FILEDELIVERYTOHARDLINK 0x00004000
1111	#define DBS_FILEDELIVERYTOSYMLINK 0x00008000
1112	#define DBS_WRITEMAPTOHARDLINK 0x00010000
1113	#define DBS_WRITEMAPTOSYMLINK 0x00020000
1114	#define DBS_WRITESTATSTOHARDLINK 0x00040000
1115	#define DBS_WRITESTATSTOSYMLINK 0x00080000
1116	#define DBS_FORWARDFILEINGROUPWRITABLEDIRPATH 0x00100000
1117	#define DBS_INCLUDEFILEINGROUPWRITABLEDIRPATH 0x00200000
1118	#define DBS_CLASSFILEINUNSAFEDIRPATH 0x00400000
1119	#define DBS_ERRORHEADERINUNSAFEDIRPATH 0x00800000
1120	#define DBS_HELPFILEINUNSAFEDIRPATH 0x01000000
1121	#define DBS_FORWARDFILEINUNSAFEDIRPATHSAFE 0x02000000
1122	#define DBS_INCLUDEFILEINUNSAFEDIRPATHSAFE 0x04000000
1123	#define DBS_RUNPROGRAMINUNSAFEDIRPATH 0x08000000
1124	#define DBS_RUNWRITABLEPROGRAM 0x10000000
1125	#define DBS_INCLUDEFILEINUNSAFEDIRPATH 0x20000000
1126
1127	/* struct defining such things */
1128	struct dbsval
1129	{
1130	char dbs_name; / name of DontBlameSendmail flag */
1131	long dbs_flag; /* numeric level */
1132	};
1133
1134	EXTERN long DontBlameSendmail; /* DontBlameSendmail option bits */
1135
1136	/*
1137	** Terminal escape codes.
1138	**
1139	** To make debugging output clearer.
1140	*/
1141
1142	struct termescape
1143	{
1144	char te_rv_on; / turn reverse-video on */
1145	char te_rv_off; / turn reverse-video off */
1146	};
1147
1148	EXTERN struct termescape TermEscape;
1149
1150
1151	/*
1152	** Error return from inet_addr(3), in case not defined in /usr/include.
1153	*/
1154
1155	#ifndef INADDR_NONE
1156	# define INADDR_NONE 0xffffffff
1157	#endif
1158	/*
1159	** Global variables.
1160	*/
1161
1162	EXTERN bool FromFlag; /* if set, "From" person is explicit */
1163	EXTERN bool MeToo; /* send to the sender also */
1164	EXTERN bool IgnrDot; /* don't let dot end messages */
1165	EXTERN bool SaveFrom; /* save leading "From" lines */
1166	EXTERN bool GrabTo; /* if set, get recipients from msg */
1167	EXTERN bool SuprErrs; /* set if we are suppressing errors */
1168	EXTERN bool HoldErrs; /* only output errors to transcript */
1169	EXTERN bool NoConnect; /* don't connect to non-local mailers */
1170	EXTERN bool SuperSafe; /* be extra careful, even if expensive */
1171	EXTERN bool ForkQueueRuns; /* fork for each job when running the queue */
1172	EXTERN bool AutoRebuild; /* auto-rebuild the alias database as needed */
1173	EXTERN bool CheckAliases; /* parse addresses during newaliases */
1174	EXTERN bool NoAlias; /* suppress aliasing */
1175	EXTERN bool UseNameServer; /* using DNS -- interpret h_errno & MX RRs */
1176	EXTERN bool UseHesiod; /* using Hesiod -- interpret Hesiod errors */
1177	EXTERN bool SevenBitInput; /* force 7-bit data on input */
1178	EXTERN bool HasEightBits; /* has at least one eight bit input byte */
1179	EXTERN bool ConfigFileRead; /* configuration file has been read */
1180	EXTERN time_t SafeAlias; /* interval to wait until @:@ in alias file */
1181	EXTERN FILE InChannel; / input connection */
1182	EXTERN FILE OutChannel; / output connection */
1183	EXTERN char RealUserName; / real user name of caller */
1184	EXTERN uid_t RealUid; /* real uid of caller */
1185	EXTERN gid_t RealGid; /* real gid of caller */
1186	EXTERN uid_t DefUid; /* default uid to run as */
1187	EXTERN gid_t DefGid; /* default gid to run as */
1188	EXTERN char DefUser; / default user to run as (from DefUid) */
1189	EXTERN uid_t TrustedUid; /* uid of trusted user for files and startup */
1190	EXTERN MODE_T OldUmask; /* umask when sendmail starts up */
1191	EXTERN int Verbose; /* set if blow-by-blow desired */
1192	EXTERN int Errors; /* set if errors (local to single pass) */
1193	EXTERN int ExitStat; /* exit status code */
1194	EXTERN int LineNumber; /* line number in current input */
1195	EXTERN int LogLevel; /* level of logging to perform */
1196	EXTERN int FileMode; /* mode on files */
1197	EXTERN int QueueLA; /* load average starting forced queueing */
1198	EXTERN int RefuseLA; /* load average refusing connections are */
1199	EXTERN int CurrentLA; /* current load average */
1200	EXTERN long QueueFactor; /* slope of queue function */
1201	EXTERN time_t QueueIntvl; /* intervals between running the queue */
1202	EXTERN char HelpFile; / location of SMTP help file */
1203	EXTERN char ErrMsgFile; / file to prepend to all error messages */
1204	EXTERN char StatFile; / location of statistics summary */
1205	EXTERN char QueueDir; / location of queue directory */
1206	EXTERN char FileName; / name to print on error messages */
1207	EXTERN char SmtpPhase; / current phase in SMTP processing */
1208	EXTERN char MyHostName; / name of this host for SMTP messages */
1209	EXTERN char RealHostName; / name of host we are talking to */
1210	EXTERN char CurHostName; / current host we are dealing with */
1211	EXTERN jmp_buf TopFrame; /* branch-to-top-of-loop-on-error frame */
1212	EXTERN bool QuickAbort; /* .... but only if we want a quick abort */
1213	EXTERN bool OnlyOneError; /* .... or only want to give one SMTP reply */
1214	EXTERN bool LogUsrErrs; /* syslog user errors (e.g., SMTP RCPT cmd) */
1215	EXTERN bool SendMIMEErrors; /* send error messages in MIME format */
1216	EXTERN bool MatchGecos; /* look for user names in gecos field */
1217	EXTERN bool UseErrorsTo; /* use Errors-To: header (back compat) */
1218	EXTERN bool TryNullMXList; /* if we are the best MX, try host directly */
1219	EXTERN bool InChild; /* true if running in an SMTP subprocess */
1220	EXTERN bool DisConnected; /* running with OutChannel redirected to xf */
1221	EXTERN bool ColonOkInAddr; /* single colon legal in address */
1222	EXTERN bool HasWildcardMX; /* don't use MX records when canonifying */
1223	EXTERN char SpaceSub; /* substitution for <lwsp> */
1224	EXTERN int PrivacyFlags; /* privacy flags */
1225	EXTERN char ConfFile; / location of configuration file [conf.c] */
1226	EXTERN char PidFile; / location of proc id file [conf.c] */
1227	EXTERN char ControlSocketName; / control socket filename [control.c] */
1228	extern ADDRESS NullAddress; /* a null (template) address [main.c] */
1229	EXTERN long WkClassFact; /* multiplier for message class -> priority */
1230	EXTERN long WkRecipFact; /* multiplier for # of recipients -> priority */
1231	EXTERN long WkTimeFact; /* priority offset each time this job is run */
1232	EXTERN char UdbSpec; / user database source spec */
1233	EXTERN int MaxHopCount; /* max # of hops until bounce */
1234	EXTERN int ConfigLevel; /* config file level */
1235	EXTERN char TimeZoneSpec; / override time zone specification */
1236	EXTERN char ForwardPath; / path to search for .forward files */
1237	EXTERN long MinBlocksFree; /* min # of blocks free on queue fs */
1238	EXTERN char FallBackMX; / fall back MX host */
1239	EXTERN long MaxMessageSize; /* advertised max size we will accept */
1240	EXTERN time_t MinQueueAge; /* min delivery interval */
1241	EXTERN time_t DialDelay; /* delay between dial-on-demand tries */
1242	EXTERN char SafeFileEnv; / chroot location for file delivery */
1243	EXTERN char HostsFile; / path to /etc/hosts file */
1244	EXTERN char HostStatDir; / location of host status information */
1245	EXTERN int MaxQueueRun; /* maximum number of jobs in one queue run */
1246	EXTERN int MaxChildren; /* maximum number of daemonic children */
1247	EXTERN int CurChildren; /* current number of daemonic children */
1248	EXTERN char SmtpGreeting; / SMTP greeting message (old $e macro) */
1249	EXTERN char UnixFromLine; / UNIX From_ line (old $l macro) */
1250	EXTERN char OperatorChars; / operators (old $o macro) */
1251	EXTERN bool DontInitGroups; /* avoid initgroups() because of NIS cost */
1252	EXTERN int DefaultNotify; /* default DSN notification flags */
1253	EXTERN bool AllowBogusHELO; /* allow syntax errors on HELO command */
1254	EXTERN bool UserSubmission; /* initial (user) mail submission */
1255	EXTERN char RunAsUserName; / user to become for bulk of run */
1256	EXTERN uid_t RunAsUid; /* UID to become for bulk of run */
1257	EXTERN gid_t RunAsGid; /* GID to become for bulk of run */
1258	EXTERN int MaxRcptPerMsg; /* max recipients per SMTP message */
1259	EXTERN bool DoQueueRun; /* non-interrupt time queue run needed */
1260	EXTERN u_long ConnectOnlyTo; /* override connection address (for testing) */
1261	EXTERN int MaxHeadersLength; /* max length of headers */
1262	#if _FFR_DSN_RRT_OPTION
1263	EXTERN bool RrtImpliesDsn; /* turn Return-Receipt-To: into DSN */
1264	#endif
1265	EXTERN char DeadLetterDrop; / path to dead letter office */
1266	EXTERN bool DontProbeInterfaces; /* don't probe interfaces for names */
1267	EXTERN bool ChownAlwaysSafe; /* treat chown(2) as safe */
1268	EXTERN bool IgnoreHostStatus; /* ignore long term host status files */
1269	EXTERN bool SingleThreadDelivery; /* single thread hosts on delivery */
1270	EXTERN bool SingleLineFromHeader; /* force From: header to be one line */
1271	EXTERN bool DontLockReadFiles; /* don't read lock support files */
1272	EXTERN int ConnRateThrottle; /* throttle for SMTP connection rate */
1273	EXTERN int MaxAliasRecursion; /* maximum depth of alias recursion */
1274	EXTERN int MaxMacroRecursion; /* maximum depth of macro recursion */
1275	EXTERN int MaxRuleRecursion; /* maximum depth of ruleset recursion */
1276	EXTERN char MustQuoteChars; / quote these characters in phrases */
1277	EXTERN char ServiceSwitchFile; / backup service switch */
1278	EXTERN char DefaultCharSet; / default character set for MIME */
1279	EXTERN char PostMasterCopy; / address to get errs cc's */
1280	EXTERN int CheckpointInterval; /* queue file checkpoint interval */
1281	EXTERN bool DontPruneRoutes; /* don't prune source routes */
1282	EXTERN bool DontExpandCnames; /* do not $[...$] expand CNAMEs */
1283	EXTERN int MaxMciCache; /* maximum entries in MCI cache */
1284	EXTERN time_t ServiceCacheTime; /* time service switch was cached */
1285	EXTERN time_t ServiceCacheMaxAge; /* refresh interval for cache */
1286	EXTERN time_t MciCacheTimeout; /* maximum idle time on connections */
1287	EXTERN time_t MciInfoTimeout; /* how long 'til we retry down hosts */
1288	EXTERN FILE TrafficLogFile; / file in which to log all traffic */
1289	EXTERN char DoubleBounceAddr; / where to send double bounces */
1290	EXTERN char *ExternalEnviron; / input environment */
1291	EXTERN char *UserEnviron[MAXUSERENVIRON + 1];
1292	/* saved user environment */
1293	EXTERN int MaxMimeHeaderLength; /* maximum MIME header length */
1294	EXTERN int MaxMimeFieldLength; /* maximum MIME field length */
1295
1296	extern int errno;
1297
1298	/*
1299	** Queue Run Limitations
1300	*/
1301	struct queue_char
1302	{
1303	char queue_match; / string to match */
1304	struct queue_char *queue_next;
1305	};
1306
1307	typedef struct queue_char QUEUE_CHAR;
1308
1309	EXTERN QUEUE_CHAR QueueLimitRecipient; / limit queue runs to this recipient */
1310	EXTERN QUEUE_CHAR QueueLimitSender; / limit queue runs to this sender */
1311	EXTERN QUEUE_CHAR QueueLimitId; / limit queue runs to this id */
1312
1313	/*
1314	** Timeouts
1315	**
1316	** Indicated values are the MINIMUM per RFC 1123 section 5.3.2.
1317	*/
1318
1319	EXTERN struct
1320	{
1321	/* RFC 1123-specified timeouts [minimum value] */
1322	time_t to_initial; /* initial greeting timeout [5m] */
1323	time_t to_mail; /* MAIL command [5m] */
1324	time_t to_rcpt; /* RCPT command [5m] */
1325	time_t to_datainit; /* DATA initiation [2m] */
1326	time_t to_datablock; /* DATA block [3m] */
1327	time_t to_datafinal; /* DATA completion [10m] */
1328	time_t to_nextcommand; /* next command [5m] */
1329	/* following timeouts are not mentioned in RFC 1123 */
1330	time_t to_iconnect; /* initial connection timeout (first try) */
1331	time_t to_connect; /* initial connection timeout (later tries) */
1332	time_t to_rset; /* RSET command */
1333	time_t to_helo; /* HELO command */
1334	time_t to_quit; /* QUIT command */
1335	time_t to_miscshort; /* misc short commands (NOOP, VERB, etc) */
1336	time_t to_ident; /* IDENT protocol requests */
1337	time_t to_fileopen; /* opening :include: and .forward files */
1338	/* following are per message */
1339	time_t to_q_return[MAXTOCLASS]; /* queue return timeouts */
1340	time_t to_q_warning[MAXTOCLASS]; /* queue warning timeouts */
1341	} TimeOuts;
1342
1343	/* timeout classes for return and warning timeouts */
1344	# define TOC_NORMAL 0 /* normal delivery */
1345	# define TOC_URGENT 1 /* urgent delivery */
1346	# define TOC_NONURGENT 2 /* non-urgent delivery */
1347
1348
1349	/*
1350	** Trace information
1351	*/
1352
1353	/* trace vector and macros for debugging flags */
1354	EXTERN u_char tTdvect[100];
1355	# define tTd(flag, level) (tTdvect[flag] >= level)
1356	# define tTdlevel(flag) (tTdvect[flag])
1357	/*
1358	** Miscellaneous information.
1359	*/
1360
1361
1362	/*
1363	** The "no queue id" queue id for sm_syslog
1364	*/
1365
1366	#define NOQID "~"
1367
1368
1369	/*
1370	** Some in-line functions
1371	*/
1372
1373	/* set exit status */
1374	#define setstat(s) { \
1375	if (ExitStat == EX_OK \|\| ExitStat == EX_TEMPFAIL) \
1376	ExitStat = s; \
1377	}
1378
1379	/* make a copy of a string */
1380	#define newstr(s) strcpy(xalloc(strlen(s) + 1), s)
1381
1382	#define STRUCTCOPY(s, d) d = s
1383
1384
1385
1386	/*
1387	** Declarations of useful functions
1388	*/
1389
1390	extern char *xalloc __P((int));
1391	extern char sfgets __P((char , int, FILE , time_t, char ));
1392	extern char queuename __P((ENVELOPE , int));
1393	extern time_t curtime __P((void));
1394	extern bool transienterror __P((int));
1395	extern char fgetfolded __P((char , int, FILE *));
1396	extern char *username __P((void));
1397	extern char *pintvl __P((time_t, bool));
1398	extern bool shouldqueue __P((long, time_t));
1399	extern bool lockfile __P((int, char , char , int));
1400	extern char hostsignature __P((MAILER , char , ENVELOPE ));
1401	extern void openxscript __P((ENVELOPE *));
1402	extern void closexscript __P((ENVELOPE *));
1403	extern char shortenstring __P((const char , int));
1404	extern bool usershellok __P((char , char ));
1405	extern char defcharset __P((ENVELOPE ));
1406	extern bool wordinclass __P((char *, int));
1407	extern char denlstring __P((char , bool, bool));
1408	extern void makelower __P((char *));
1409	extern bool rebuildaliases __P((MAP *, bool));
1410	extern void readaliases __P((MAP , FILE , bool, bool));
1411	extern void finis __P((bool, volatile int));
1412	extern void setsender __P((char , ENVELOPE , char **, int, bool));
1413	extern void xputs __P((const char *));
1414	extern void logsender __P((ENVELOPE , char ));
1415	extern void smtprset __P((MAILER , MCI , ENVELOPE *));
1416	extern void smtpquit __P((MAILER , MCI , ENVELOPE *));
1417	extern void setuserenv __P((const char , const char ));
1418	extern char getextenv __P((const char ));
1419	extern void disconnect __P((int, ENVELOPE *));
1420	extern void putxline __P((char , size_t, MCI , int));
1421	extern void dumpfd __P((int, bool, bool));
1422	extern void makemailer __P((char *));
1423	extern void putfromline __P((MCI , ENVELOPE ));
1424	extern void setoption __P((int, char , bool, bool, ENVELOPE ));
1425	extern void setclass __P((int, char *));
1426	extern void inittimeouts __P((char *));
1427	extern void logdelivery __P((MAILER , MCI , const char , ADDRESS , time_t, ENVELOPE *));
1428	extern void giveresponse __P((int, MAILER , MCI , ADDRESS , time_t, ENVELOPE ));
1429	extern void buildfname __P((char , char , char *, int));
1430	extern void mci_setstat __P((MCI , int, char , char *));
1431	extern char *smtptodsn __P((int));
1432	extern int rscheck __P((char , char , char , ENVELOPE e));
1433	extern void mime7to8 __P((MCI , HDR , ENVELOPE *));
1434	extern int mime8to7 __P((MCI , HDR , ENVELOPE , char *, int));
1435	extern void xfclose __P((FILE , char , char *));
1436	extern int switch_map_find __P((char , char [], short []));
1437	extern void shorten_hostname __P((char []));
1438	extern int waitfor __P((pid_t));
1439	extern void proc_list_add __P((pid_t, char *));
1440	extern void proc_list_set __P((pid_t, char *));
1441	extern void proc_list_drop __P((pid_t));
1442	extern void proc_list_clear __P((void));
1443	extern void proc_list_display __P((FILE *));
1444	extern void proc_list_probe __P((void));
1445	extern void buffer_errors __P((void));
1446	extern void flush_errors __P((bool));
1447	extern void putline __P((char , MCI ));
1448	extern bool xtextok __P((char *));
1449	extern char xtextify __P((char , char *));
1450	extern char xuntextify __P((char ));
1451	extern void cleanstrcpy __P((char , char , int));
1452	extern int getmxrr __P((char , char , bool, int ));
1453	extern int strtorwset __P((char , char *, int));
1454	extern void printav __P((char **));
1455	extern void printopenfds __P((bool));
1456	extern int endmailer __P((MCI , ENVELOPE , char **));
1457	extern void fixcrlf __P((char *, bool));
1458	extern int dofork __P((void));
1459	extern void initsys __P((ENVELOPE *));
1460	extern void collect __P((FILE , bool, HDR , ENVELOPE ));
1461	extern void stripquotes __P((char *));
1462	extern int include __P((char , bool, ADDRESS , ADDRESS *, int, ENVELOPE ));
1463	extern void unlockqueue __P((ENVELOPE *));
1464	extern void xunlink __P((char *));
1465	extern bool runqueue __P((bool, bool));
1466	extern int getla __P((void));
1467	extern void sendall __P((ENVELOPE *, int));
1468	extern void queueup __P((ENVELOPE *, bool));
1469	extern void checkfds __P((char *));
1470	extern int returntosender __P((char , ADDRESS , int, ENVELOPE *));
1471	extern void markstats __P((ENVELOPE , ADDRESS , bool));
1472	extern void poststats __P((char *));
1473	extern char arpadate __P((char ));
1474	extern int mailfile __P((char volatile, MAILER volatile, ADDRESS , volatile int, ENVELOPE ));
1475	extern void loseqfile __P((ENVELOPE , char ));
1476	extern int prog_open __P((char *, int , ENVELOPE *));
1477	extern bool getcanonname __P((char *, int, bool));
1478	extern bool path_is_dir __P((char *, bool));
1479	extern pid_t dowork __P((char , bool, bool, ENVELOPE ));
1480	extern int drop_privileges __P((bool));
1481	extern void fill_fd __P((int, char *));
1482	extern void closecontrolsocket __P((bool));
1483	extern void clrcontrol __P((void));
1484
1485	extern const char *errstring __P((int));
1486	extern sigfunc_t setsignal __P((int, sigfunc_t));
1487	extern int blocksignal __P((int));
1488	extern int releasesignal __P((int));
1489	extern struct hostent sm_gethostbyname __P((char ));
1490	extern struct hostent sm_gethostbyaddr __P((char , int, int));
1491	extern struct passwd sm_getpwnam __P((char ));
1492	extern struct passwd *sm_getpwuid __P((UID_T));
1493	extern struct passwd finduser __P((char , bool *));
1494
1495	#ifdef XDEBUG
1496	extern void checkfdopen __P((int, char *));
1497	extern void checkfd012 __P((char *));
1498	#endif
1499
1500	/* ellipsis is a different case though */
1501	extern void auth_warning __P((ENVELOPE , const char , ...));
1502	extern void syserr __P((const char *, ...));
1503	extern void usrerr __P((const char *, ...));
1504	extern void message __P((const char *, ...));
1505	extern void nmessage __P((const char *, ...));
1506	extern void setproctitle __P((const char *, ...));
1507	extern void sm_setproctitle __P((bool, const char *, ...));
1508	extern void sm_syslog __P((int, const char , const char , ...));
1509
1510	#if !HASSNPRINTF
1511	extern int snprintf __P((char , size_t, const char , ...));
1512	extern int vsnprintf __P((char , size_t, const char , va_list));
1513	#endif
1514	extern char *quad_to_string __P((QUAD_T));

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