122711Sdist /*
234921Sbostic  * Copyright (c) 1983 Eric P. Allman
362531Sbostic  * Copyright (c) 1988, 1993
462531Sbostic  *	The Regents of the University of California.  All rights reserved.
533731Sbostic  *
642829Sbostic  * %sccs.include.redist.c%
733731Sbostic  */
822711Sdist 
922711Sdist #ifndef lint
10*68141Seric static char sccsid[] = "@(#)savemail.c	8.50 (Berkeley) 01/07/95";
1133731Sbostic #endif /* not lint */
1222711Sdist 
1363937Seric # include "sendmail.h"
14297Seric # include <pwd.h>
15297Seric 
16297Seric /*
17297Seric **  SAVEMAIL -- Save mail on error
18297Seric **
199375Seric **	If mailing back errors, mail it back to the originator
20297Seric **	together with an error message; otherwise, just put it in
21297Seric **	dead.letter in the user's home directory (if he exists on
22297Seric **	this machine).
23297Seric **
24297Seric **	Parameters:
259337Seric **		e -- the envelope containing the message in error.
2667981Seric **		sendbody -- if TRUE, also send back the body of the
2767981Seric **			message; otherwise just send the header.
28297Seric **
29297Seric **	Returns:
30297Seric **		none
31297Seric **
32297Seric **	Side Effects:
33297Seric **		Saves the letter, by writing or mailing it back to the
34297Seric **		sender, or by putting it in dead.letter in her home
35297Seric **		directory.
36297Seric */
37297Seric 
3824942Seric /* defines for state machine */
3924942Seric # define ESM_REPORT	0	/* report to sender's terminal */
4024942Seric # define ESM_MAIL	1	/* mail back to sender */
4124942Seric # define ESM_QUIET	2	/* messages have already been returned */
4224942Seric # define ESM_DEADLETTER	3	/* save in ~/dead.letter */
4324942Seric # define ESM_POSTMASTER	4	/* return to postmaster */
4424942Seric # define ESM_USRTMP	5	/* save in /usr/tmp/dead.letter */
4524942Seric # define ESM_PANIC	6	/* leave the locked queue/transcript files */
4624942Seric # define ESM_DONE	7	/* the message is successfully delivered */
4724942Seric 
4865174Seric # ifndef _PATH_VARTMP
4965174Seric #  define _PATH_VARTMP	"/usr/tmp/"
5065174Seric # endif
5124942Seric 
5265174Seric 
5367981Seric savemail(e, sendbody)
549337Seric 	register ENVELOPE *e;
5567981Seric 	bool sendbody;
56297Seric {
57297Seric 	register struct passwd *pw;
5824942Seric 	register FILE *fp;
5924942Seric 	int state;
6059290Seric 	auto ADDRESS *q = NULL;
6165870Seric 	register char *p;
6265870Seric 	MCI mcibuf;
63297Seric 	char buf[MAXLINE+1];
64297Seric 	extern struct passwd *getpwnam();
65297Seric 	extern char *ttypath();
665846Seric 	typedef int (*fnptr)();
6764945Seric 	extern bool writable();
68297Seric 
697676Seric 	if (tTd(6, 1))
7058680Seric 	{
7166317Seric 		printf("\nsavemail, errormode = %c, id = %s, ExitStat = %d\n  e_from=",
7266317Seric 			e->e_errormode, e->e_id == NULL ? "NONE" : e->e_id,
7366317Seric 			ExitStat);
7458680Seric 		printaddr(&e->e_from, FALSE);
7558680Seric 	}
767361Seric 
7759101Seric 	if (e->e_id == NULL)
7859101Seric 	{
7959101Seric 		/* can't return a message with no id */
8059101Seric 		return;
8159101Seric 	}
8259101Seric 
83297Seric 	/*
84297Seric 	**  In the unhappy event we don't know who to return the mail
85297Seric 	**  to, make someone up.
86297Seric 	*/
87297Seric 
889337Seric 	if (e->e_from.q_paddr == NULL)
89297Seric 	{
9058733Seric 		e->e_sender = "Postmaster";
9164284Seric 		if (parseaddr(e->e_sender, &e->e_from,
9264284Seric 			      RF_COPYPARSE|RF_SENDERADDR, '\0', NULL, e) == NULL)
93297Seric 		{
9458733Seric 			syserr("553 Cannot parse Postmaster!");
95297Seric 			ExitStat = EX_SOFTWARE;
96297Seric 			finis();
97297Seric 		}
98297Seric 	}
999337Seric 	e->e_to = NULL;
100297Seric 
101297Seric 	/*
10224942Seric 	**  Basic state machine.
10324942Seric 	**
10424942Seric 	**	This machine runs through the following states:
10524942Seric 	**
10624942Seric 	**	ESM_QUIET	Errors have already been printed iff the
10724942Seric 	**			sender is local.
10824942Seric 	**	ESM_REPORT	Report directly to the sender's terminal.
10924942Seric 	**	ESM_MAIL	Mail response to the sender.
11024942Seric 	**	ESM_DEADLETTER	Save response in ~/dead.letter.
11124942Seric 	**	ESM_POSTMASTER	Mail response to the postmaster.
11224942Seric 	**	ESM_PANIC	Save response anywhere possible.
113297Seric 	*/
114297Seric 
11524942Seric 	/* determine starting state */
11658734Seric 	switch (e->e_errormode)
117297Seric 	{
11824942Seric 	  case EM_WRITE:
11924942Seric 		state = ESM_REPORT;
12024942Seric 		break;
12124942Seric 
12224942Seric 	  case EM_BERKNET:
12324942Seric 		/* mail back, but return o.k. exit status */
124401Seric 		ExitStat = EX_OK;
12524942Seric 
12624942Seric 		/* fall through.... */
12724942Seric 
12824942Seric 	  case EM_MAIL:
12924942Seric 		state = ESM_MAIL;
13024942Seric 		break;
13124942Seric 
13224942Seric 	  case EM_PRINT:
13324979Seric 	  case '\0':
13424942Seric 		state = ESM_QUIET;
13524942Seric 		break;
13624942Seric 
13724942Seric 	  case EM_QUIET:
13824942Seric 		/* no need to return anything at all */
13924942Seric 		return;
14024979Seric 
14124979Seric 	  default:
14258734Seric 		syserr("554 savemail: bogus errormode x%x\n", e->e_errormode);
14324979Seric 		state = ESM_MAIL;
14424979Seric 		break;
145297Seric 	}
146297Seric 
14759094Seric 	/* if this is already an error response, send to postmaster */
14859094Seric 	if (bitset(EF_RESPONSE, e->e_flags))
14959094Seric 	{
15059094Seric 		if (e->e_parent != NULL &&
15159094Seric 		    bitset(EF_RESPONSE, e->e_parent->e_flags))
15259094Seric 		{
15359094Seric 			/* got an error sending a response -- can it */
15459094Seric 			return;
15559094Seric 		}
15659094Seric 		state = ESM_POSTMASTER;
15759094Seric 	}
15859094Seric 
15924942Seric 	while (state != ESM_DONE)
160297Seric 	{
16124979Seric 		if (tTd(6, 5))
16224979Seric 			printf("  state %d\n", state);
16324979Seric 
16424942Seric 		switch (state)
165297Seric 		{
16624979Seric 		  case ESM_QUIET:
16767473Seric 			if (bitnset(M_LOCALMAILER, e->e_from.q_mailer->m_flags))
16824979Seric 				state = ESM_DEADLETTER;
16924979Seric 			else
17024979Seric 				state = ESM_MAIL;
17124979Seric 			break;
17224979Seric 
17324942Seric 		  case ESM_REPORT:
17424942Seric 
17524942Seric 			/*
17624942Seric 			**  If the user is still logged in on the same terminal,
17724942Seric 			**  then write the error messages back to hir (sic).
17824942Seric 			*/
17924942Seric 
18024942Seric 			p = ttypath();
18124942Seric 			if (p == NULL || freopen(p, "w", stdout) == NULL)
18224942Seric 			{
18324942Seric 				state = ESM_MAIL;
18424942Seric 				break;
18524942Seric 			}
18624942Seric 
18758050Seric 			expand("\201n", buf, &buf[sizeof buf - 1], e);
1889375Seric 			printf("\r\nMessage from %s...\r\n", buf);
1899375Seric 			printf("Errors occurred while sending mail.\r\n");
1909542Seric 			if (e->e_xfp != NULL)
1919375Seric 			{
1929542Seric 				(void) fflush(e->e_xfp);
19324942Seric 				fp = fopen(queuename(e, 'x'), "r");
1949375Seric 			}
1959375Seric 			else
19624942Seric 				fp = NULL;
19724942Seric 			if (fp == NULL)
1989375Seric 			{
1999337Seric 				syserr("Cannot open %s", queuename(e, 'x'));
2009375Seric 				printf("Transcript of session is unavailable.\r\n");
2019375Seric 			}
2029375Seric 			else
2039375Seric 			{
2049375Seric 				printf("Transcript follows:\r\n");
20524942Seric 				while (fgets(buf, sizeof buf, fp) != NULL &&
2069375Seric 				       !ferror(stdout))
2079375Seric 					fputs(buf, stdout);
20858680Seric 				(void) xfclose(fp, "savemail transcript", e->e_id);
2099375Seric 			}
21024942Seric 			printf("Original message will be saved in dead.letter.\r\n");
21124942Seric 			state = ESM_DEADLETTER;
21224942Seric 			break;
213297Seric 
21424942Seric 		  case ESM_MAIL:
21524942Seric 			/*
21624942Seric 			**  If mailing back, do it.
21724942Seric 			**	Throw away all further output.  Don't alias,
21824942Seric 			**	since this could cause loops, e.g., if joe
21924942Seric 			**	mails to joe@x, and for some reason the network
22024942Seric 			**	for @x is down, then the response gets sent to
22124942Seric 			**	joe@x, which gives a response, etc.  Also force
22224942Seric 			**	the mail to be delivered even if a version of
22324942Seric 			**	it has already been sent to the sender.
22463841Seric 			**
22563841Seric 			**  If this is a configuration or local software
22663841Seric 			**	error, send to the local postmaster as well,
22763841Seric 			**	since the originator can't do anything
22863841Seric 			**	about it anyway.  Note that this is a full
22963841Seric 			**	copy of the message (intentionally) so that
23063841Seric 			**	the Postmaster can forward things along.
23124942Seric 			*/
232297Seric 
23363841Seric 			if (ExitStat == EX_CONFIG || ExitStat == EX_SOFTWARE)
23463841Seric 			{
23563841Seric 				(void) sendtolist("postmaster",
23667982Seric 					  NULLADDR, &e->e_errorqueue, 0, e);
23763841Seric 			}
23867939Seric 			if (!emptyaddr(&e->e_from))
23963841Seric 			{
24058680Seric 				(void) sendtolist(e->e_from.q_paddr,
24167982Seric 					  NULLADDR, &e->e_errorqueue, 0, e);
24263841Seric 			}
24358680Seric 
24463841Seric 			/*
24563841Seric 			**  Deliver a non-delivery report to the
24663841Seric 			**  Postmaster-designate (not necessarily
24763841Seric 			**  Postmaster).  This does not include the
24863841Seric 			**  body of the message, for privacy reasons.
24963841Seric 			**  You really shouldn't need this.
25063841Seric 			*/
25163841Seric 
25263849Seric 			e->e_flags |= EF_PM_NOTIFY;
25358178Seric 
25464792Seric 			/* check to see if there are any good addresses */
25564792Seric 			for (q = e->e_errorqueue; q != NULL; q = q->q_next)
25664792Seric 				if (!bitset(QBADADDR|QDONTSEND, q->q_flags))
25764792Seric 					break;
25858680Seric 			if (q == NULL)
25958680Seric 			{
26058680Seric 				/* this is an error-error */
26158680Seric 				state = ESM_POSTMASTER;
26258680Seric 				break;
26358680Seric 			}
26466303Seric 			if (returntosender(e->e_message, e->e_errorqueue,
26567981Seric 					   sendbody, e) == 0)
26658680Seric 			{
26758680Seric 				state = ESM_DONE;
26858680Seric 				break;
26958680Seric 			}
27024981Seric 
27158680Seric 			/* didn't work -- return to postmaster */
27258680Seric 			state = ESM_POSTMASTER;
27358680Seric 			break;
27458306Seric 
27558680Seric 		  case ESM_POSTMASTER:
27658680Seric 			/*
27758680Seric 			**  Similar to previous case, but to system postmaster.
27858680Seric 			*/
27958680Seric 
28059432Seric 			q = NULL;
28167982Seric 			if (sendtolist("postmaster", NULL, &q, 0, e) <= 0)
28224942Seric 			{
28358680Seric 				syserr("553 cannot parse postmaster!");
28458680Seric 				ExitStat = EX_SOFTWARE;
28558680Seric 				state = ESM_USRTMP;
28658680Seric 				break;
28724942Seric 			}
28867981Seric 			if (returntosender(e->e_message, q, sendbody, e) == 0)
28924942Seric 			{
29024942Seric 				state = ESM_DONE;
29124942Seric 				break;
29224942Seric 			}
293297Seric 
29458680Seric 			/* didn't work -- last resort */
29558680Seric 			state = ESM_USRTMP;
29624942Seric 			break;
297297Seric 
29824942Seric 		  case ESM_DEADLETTER:
29924942Seric 			/*
30024942Seric 			**  Save the message in dead.letter.
30124942Seric 			**	If we weren't mailing back, and the user is
30224942Seric 			**	local, we should save the message in
30324942Seric 			**	~/dead.letter so that the poor person doesn't
30424942Seric 			**	have to type it over again -- and we all know
30524942Seric 			**	what poor typists UNIX users are.
30624942Seric 			*/
3075315Seric 
30824942Seric 			p = NULL;
30967473Seric 			if (bitnset(M_HASPWENT, e->e_from.q_mailer->m_flags))
31024942Seric 			{
31124942Seric 				if (e->e_from.q_home != NULL)
31224942Seric 					p = e->e_from.q_home;
31324942Seric 				else if ((pw = getpwnam(e->e_from.q_user)) != NULL)
31424942Seric 					p = pw->pw_dir;
31524942Seric 			}
31624942Seric 			if (p == NULL)
31724942Seric 			{
31858865Seric 				/* no local directory */
31924942Seric 				state = ESM_MAIL;
32024942Seric 				break;
32124942Seric 			}
32224942Seric 			if (e->e_dfp != NULL)
32324942Seric 			{
32424942Seric 				bool oldverb = Verbose;
32524942Seric 
32624942Seric 				/* we have a home directory; open dead.letter */
32724942Seric 				define('z', p, e);
32858050Seric 				expand("\201z/dead.letter", buf, &buf[sizeof buf - 1], e);
32924942Seric 				Verbose = TRUE;
33058151Seric 				message("Saving message in %s", buf);
33124942Seric 				Verbose = oldverb;
33224942Seric 				e->e_to = buf;
33324942Seric 				q = NULL;
33467982Seric 				(void) sendtolist(buf, &e->e_from, &q, 0, e);
33564354Seric 				if (q != NULL &&
33664354Seric 				    !bitset(QBADADDR, q->q_flags) &&
33764354Seric 				    deliver(e, q) == 0)
33824942Seric 					state = ESM_DONE;
33924942Seric 				else
34024942Seric 					state = ESM_MAIL;
34124942Seric 			}
34225569Seric 			else
34325569Seric 			{
34425569Seric 				/* no data file -- try mailing back */
34525569Seric 				state = ESM_MAIL;
34625569Seric 			}
34724942Seric 			break;
34824942Seric 
34924942Seric 		  case ESM_USRTMP:
35024942Seric 			/*
35124942Seric 			**  Log the mail in /usr/tmp/dead.letter.
35224942Seric 			*/
35324942Seric 
35457438Seric 			if (e->e_class < 0)
35557438Seric 			{
35657438Seric 				state = ESM_DONE;
35757438Seric 				break;
35857438Seric 			}
35957438Seric 
36065174Seric 			strcpy(buf, _PATH_VARTMP);
36165174Seric 			strcat(buf, "dead.letter");
36265112Seric 			if (!writable(buf, NULLADDR, SFF_NOSLINK))
36364945Seric 			{
36464945Seric 				state = ESM_PANIC;
36564945Seric 				break;
36664945Seric 			}
36764945Seric 			fp = dfopen(buf, O_WRONLY|O_CREAT|O_APPEND, FileMode);
36824942Seric 			if (fp == NULL)
36924942Seric 			{
37024942Seric 				state = ESM_PANIC;
37124942Seric 				break;
37224942Seric 			}
37324942Seric 
37465870Seric 			bzero(&mcibuf, sizeof mcibuf);
37565870Seric 			mcibuf.mci_out = fp;
37665870Seric 			mcibuf.mci_mailer = FileMailer;
37765870Seric 			if (bitnset(M_7BITS, FileMailer->m_flags))
37865870Seric 				mcibuf.mci_flags |= MCIF_7BIT;
37965870Seric 
38065870Seric 			putfromline(&mcibuf, e);
38167936Seric 			(*e->e_puthdr)(&mcibuf, e->e_header, e, 0);
38267936Seric 			(*e->e_putbody)(&mcibuf, e, NULL, 0);
38365870Seric 			putline("\n", &mcibuf);
38424942Seric 			(void) fflush(fp);
38524942Seric 			state = ferror(fp) ? ESM_PANIC : ESM_DONE;
38667809Seric 			(void) xfclose(fp, "savemail", buf);
38724942Seric 			break;
38824942Seric 
38924942Seric 		  default:
39058151Seric 			syserr("554 savemail: unknown state %d", state);
39124942Seric 
39224942Seric 			/* fall through ... */
39324942Seric 
39424942Seric 		  case ESM_PANIC:
39524942Seric 			/* leave the locked queue & transcript files around */
39664949Seric 			syserr("!554 savemail: cannot save rejected email anywhere");
39724942Seric 		}
398297Seric 	}
399297Seric }
400297Seric /*
4014633Seric **  RETURNTOSENDER -- return a message to the sender with an error.
4024633Seric **
4034633Seric **	Parameters:
4044633Seric **		msg -- the explanatory message.
40516479Seric **		returnq -- the queue of people to send the message to.
4065984Seric **		sendbody -- if TRUE, also send back the body of the
4075984Seric **			message; otherwise just send the header.
40855012Seric **		e -- the current envelope.
4094633Seric **
4104633Seric **	Returns:
4114633Seric **		zero -- if everything went ok.
4124633Seric **		else -- some error.
4134633Seric **
4144633Seric **	Side Effects:
4154633Seric **		Returns the current message to the sender via
4164633Seric **		mail.
4174633Seric */
4184633Seric 
4195984Seric static bool	SendBody;
4204633Seric 
4217045Seric #define MAXRETURNS	6	/* max depth of returning messages */
42258559Seric #define ERRORFUDGE	100	/* nominal size of error message text */
4237045Seric 
42455012Seric returntosender(msg, returnq, sendbody, e)
4254633Seric 	char *msg;
42616479Seric 	ADDRESS *returnq;
4275984Seric 	bool sendbody;
42855012Seric 	register ENVELOPE *e;
4294633Seric {
4304633Seric 	char buf[MAXNAME];
4316978Seric 	extern putheader(), errbody();
4326978Seric 	register ENVELOPE *ee;
43358680Seric 	ENVELOPE *oldcur = CurEnv;
4346978Seric 	ENVELOPE errenvelope;
4357045Seric 	static int returndepth;
4369375Seric 	register ADDRESS *q;
4374633Seric 
43860010Seric 	if (returnq == NULL)
43960010Seric 		return (-1);
44060010Seric 
44158966Seric 	if (msg == NULL)
44258966Seric 		msg = "Unable to deliver mail";
44358966Seric 
4447676Seric 	if (tTd(6, 1))
4457287Seric 	{
44667987Seric 		printf("\n*** Return To Sender: msg=\"%s\", depth=%d, e=%x, returnq=",
44755012Seric 		       msg, returndepth, e);
44816479Seric 		printaddr(returnq, TRUE);
44967987Seric 		if (tTd(6, 20))
45067987Seric 		{
45167987Seric 			printf("Sendq=");
45267987Seric 			printaddr(e->e_sendqueue, TRUE);
45367987Seric 		}
4547287Seric 	}
4557287Seric 
4567045Seric 	if (++returndepth >= MAXRETURNS)
4577045Seric 	{
4587045Seric 		if (returndepth != MAXRETURNS)
45958151Seric 			syserr("554 returntosender: infinite recursion on %s", returnq->q_paddr);
4607045Seric 		/* don't "unrecurse" and fake a clean exit */
4617045Seric 		/* returndepth--; */
4627045Seric 		return (0);
4637045Seric 	}
4647045Seric 
4655984Seric 	SendBody = sendbody;
46658680Seric 	define('g', e->e_from.q_paddr, e);
46764940Seric 	define('u', NULL, e);
46867880Seric 
46967880Seric 	/* initialize error envelope */
47058179Seric 	ee = newenvelope(&errenvelope, e);
47158050Seric 	define('a', "\201b", ee);
47259057Seric 	define('r', "internal", ee);
47359057Seric 	define('s', "localhost", ee);
47459057Seric 	define('_', "localhost", ee);
4756978Seric 	ee->e_puthdr = putheader;
4766978Seric 	ee->e_putbody = errbody;
47764120Seric 	ee->e_flags |= EF_RESPONSE|EF_METOO;
47855012Seric 	if (!bitset(EF_OLDSTYLE, e->e_flags))
47945155Seric 		ee->e_flags &= ~EF_OLDSTYLE;
48016479Seric 	ee->e_sendqueue = returnq;
48164655Seric 	ee->e_msgsize = ERRORFUDGE;
48267473Seric 	if (!bitset(EF_NORETURN, e->e_flags))
48364655Seric 		ee->e_msgsize += e->e_msgsize;
48464737Seric 	initsys(ee);
48516479Seric 	for (q = returnq; q != NULL; q = q->q_next)
4869375Seric 	{
48759989Seric 		if (bitset(QBADADDR, q->q_flags))
48858559Seric 			continue;
48958559Seric 
490*68141Seric 		if (!DontPruneRoutes && pruneroute(q->q_paddr))
491*68141Seric 		{
492*68141Seric 			register ADDRESS *p;
493*68141Seric 
494*68141Seric 			parseaddr(q->q_paddr, q, RF_COPYPARSE, '\0', NULL, e);
495*68141Seric 			for (p = returnq; p != NULL; p = p->q_next)
496*68141Seric 			{
497*68141Seric 				if (p != q && sameaddr(p, q))
498*68141Seric 					q->q_flags |= QDONTSEND;
499*68141Seric 			}
500*68141Seric 		}
501*68141Seric 
50259989Seric 		if (!bitset(QDONTSEND, q->q_flags))
50359989Seric 			ee->e_nrcpts++;
50458559Seric 
5059375Seric 		if (q->q_alias == NULL)
50667546Seric 			addheader("To", q->q_paddr, &ee->e_header);
5079375Seric 	}
50824942Seric 
50957642Seric # ifdef LOG
51058020Seric 	if (LogLevel > 5)
51165054Seric 		syslog(LOG_INFO, "%s: %s: return to sender: %s",
51257642Seric 			e->e_id, ee->e_id, msg);
51357642Seric # endif
51457642Seric 
51568003Seric 	if (SendMIMEErrors)
51667261Seric 	{
51768003Seric 		addheader("MIME-Version", "1.0", &ee->e_header);
51868003Seric 		(void) sprintf(buf, "%s.%ld/%s",
51968003Seric 			ee->e_id, curtime(), MyHostName);
52068003Seric 		ee->e_msgboundary = newstr(buf);
52168003Seric 		(void) sprintf(buf,
52268028Seric #ifdef DSN
52368085Seric 			"multipart/report; report-type=X-delivery-status-1; boundary=\"%s\"",
52468028Seric #else
52568028Seric 			"multipart/mixed; boundary=\"%s\"",
52668028Seric #endif
52768003Seric 			ee->e_msgboundary);
52868003Seric 		addheader("Content-Type", buf, &ee->e_header);
52968003Seric 	}
53068003Seric 	else if (strncmp(msg, "Warning:", 8) == 0)
53168003Seric 	{
53267261Seric 		addheader("Subject", msg, ee);
53367546Seric 		addheader("Precedence", "autoreply warning-timeout", &ee->e_header);
53467261Seric 	}
53567429Seric 	else if (strcmp(msg, "Return receipt") == 0)
53667429Seric 	{
53767429Seric 		addheader("Subject", msg, ee);
53867546Seric 		addheader("Precedence", "autoreply return-receipt", &ee->e_header);
53967429Seric 	}
54067261Seric 	else
54167261Seric 	{
54267261Seric 		sprintf(buf, "Returned mail: %.*s", sizeof buf - 20, msg);
54367546Seric 		addheader("Subject", buf, &ee->e_header);
54467546Seric 		addheader("Precedence", "autoreply failure-message", &ee->e_header);
54567261Seric 	}
5464633Seric 
5474633Seric 	/* fake up an address header for the from person */
54858050Seric 	expand("\201n", buf, &buf[sizeof buf - 1], e);
54964284Seric 	if (parseaddr(buf, &ee->e_from, RF_COPYALL|RF_SENDERADDR, '\0', NULL, e) == NULL)
5504633Seric 	{
55158151Seric 		syserr("553 Can't parse myself!");
5524633Seric 		ExitStat = EX_SOFTWARE;
5537045Seric 		returndepth--;
5544633Seric 		return (-1);
5554633Seric 	}
55658704Seric 	ee->e_sender = ee->e_from.q_paddr;
5575984Seric 
5586978Seric 	/* push state into submessage */
5596978Seric 	CurEnv = ee;
56058050Seric 	define('f', "\201n", ee);
5619375Seric 	define('x', "Mail Delivery Subsystem", ee);
56258929Seric 	eatheader(ee, TRUE);
5635984Seric 
56463753Seric 	/* mark statistics */
56564284Seric 	markstats(ee, NULLADDR);
56663753Seric 
5676978Seric 	/* actually deliver the error message */
56814876Seric 	sendall(ee, SM_DEFAULT);
5696978Seric 
5706978Seric 	/* restore state */
5717811Seric 	dropenvelope(ee);
57258680Seric 	CurEnv = oldcur;
5737045Seric 	returndepth--;
5746978Seric 
5757045Seric 	/* should check for delivery errors here */
5764633Seric 	return (0);
5774633Seric }
5784633Seric /*
5796978Seric **  ERRBODY -- output the body of an error message.
5806978Seric **
5816978Seric **	Typically this is a copy of the transcript plus a copy of the
5826978Seric **	original offending message.
5836978Seric **
584297Seric **	Parameters:
58565870Seric **		mci -- the mailer connection information.
5869542Seric **		e -- the envelope we are working in.
58767546Seric **		separator -- any possible MIME separator.
58867936Seric **		flags -- to modify the behaviour.
589297Seric **
590297Seric **	Returns:
591297Seric **		none
592297Seric **
593297Seric **	Side Effects:
5946978Seric **		Outputs the body of an error message.
595297Seric */
596297Seric 
59767936Seric errbody(mci, e, separator, flags)
59865870Seric 	register MCI *mci;
5999542Seric 	register ENVELOPE *e;
60067546Seric 	char *separator;
601297Seric {
6026978Seric 	register FILE *xfile;
60359082Seric 	char *p;
60459082Seric 	register ADDRESS *q;
60559082Seric 	bool printheader;
60667936Seric 	int pflags = flags;
6073189Seric 	char buf[MAXLINE];
608297Seric 
60967546Seric 	if (bitset(MCIF_INHEADER, mci->mci_flags))
61067546Seric 	{
61167546Seric 		putline("", mci);
61267546Seric 		mci->mci_flags &= ~MCIF_INHEADER;
61367546Seric 	}
61458680Seric 	if (e->e_parent == NULL)
61558680Seric 	{
61658680Seric 		syserr("errbody: null parent");
61765870Seric 		putline("   ----- Original message lost -----\n", mci);
61858680Seric 		return;
61958680Seric 	}
62058680Seric 
6219057Seric 	/*
62259730Seric 	**  Output MIME header.
62359730Seric 	*/
62459730Seric 
62559730Seric 	if (e->e_msgboundary != NULL)
62659730Seric 	{
62765870Seric 		putline("This is a MIME-encapsulated message", mci);
62865870Seric 		putline("", mci);
62959730Seric 		(void) sprintf(buf, "--%s", e->e_msgboundary);
63065870Seric 		putline(buf, mci);
63165870Seric 		putline("", mci);
63259730Seric 	}
63359730Seric 
63459730Seric 	/*
63563852Seric 	**  Output introductory information.
63663852Seric 	*/
63763852Seric 
63864718Seric 	for (q = e->e_parent->e_sendqueue; q != NULL; q = q->q_next)
63964718Seric 		if (bitset(QBADADDR, q->q_flags))
64064718Seric 			break;
64165054Seric 	if (q == NULL &&
64265054Seric 	    !bitset(EF_FATALERRS|EF_SENDRECEIPT, e->e_parent->e_flags))
64364718Seric 	{
64464718Seric 		putline("    **********************************************",
64565870Seric 			mci);
64664718Seric 		putline("    **      THIS IS A WARNING MESSAGE ONLY      **",
64765870Seric 			mci);
64864718Seric 		putline("    **  YOU DO NOT NEED TO RESEND YOUR MESSAGE  **",
64965870Seric 			mci);
65064718Seric 		putline("    **********************************************",
65165870Seric 			mci);
65265870Seric 		putline("", mci);
65364718Seric 	}
65464718Seric 	sprintf(buf, "The original message was received at %s",
65564718Seric 		arpadate(ctime(&e->e_parent->e_ctime)));
65665870Seric 	putline(buf, mci);
65764025Seric 	expand("from \201_", buf, &buf[sizeof buf - 1], e->e_parent);
65865870Seric 	putline(buf, mci);
65965870Seric 	putline("", mci);
66063852Seric 
66163852Seric 	/*
66255372Seric 	**  Output error message header (if specified and available).
66355372Seric 	*/
66455372Seric 
66567682Seric 	if (ErrMsgFile != NULL && !bitset(EF_SENDRECEIPT, e->e_parent->e_flags))
66655372Seric 	{
66755372Seric 		if (*ErrMsgFile == '/')
66855372Seric 		{
66955372Seric 			xfile = fopen(ErrMsgFile, "r");
67055372Seric 			if (xfile != NULL)
67155372Seric 			{
67255372Seric 				while (fgets(buf, sizeof buf, xfile) != NULL)
67355425Seric 				{
67455425Seric 					expand(buf, buf, &buf[sizeof buf - 1], e);
67565870Seric 					putline(buf, mci);
67655425Seric 				}
67755372Seric 				(void) fclose(xfile);
67865870Seric 				putline("\n", mci);
67955372Seric 			}
68055372Seric 		}
68155372Seric 		else
68255372Seric 		{
68355425Seric 			expand(ErrMsgFile, buf, &buf[sizeof buf - 1], e);
68465870Seric 			putline(buf, mci);
68565870Seric 			putline("", mci);
68655372Seric 		}
68755372Seric 	}
68855372Seric 
68955372Seric 	/*
69059082Seric 	**  Output message introduction
69159082Seric 	*/
69259082Seric 
69359082Seric 	printheader = TRUE;
69459082Seric 	for (q = e->e_parent->e_sendqueue; q != NULL; q = q->q_next)
69559082Seric 	{
69667981Seric 		if (bitset(QBADADDR|QREPORT|QRELAYED, q->q_flags))
69759082Seric 		{
69859082Seric 			if (printheader)
69959082Seric 			{
70067880Seric 				putline("   ----- The following addresses have delivery notifications -----",
70165870Seric 					mci);
70259082Seric 				printheader = FALSE;
70359082Seric 			}
70463849Seric 			strcpy(buf, q->q_paddr);
70563787Seric 			if (bitset(QBADADDR, q->q_flags))
70663849Seric 				strcat(buf, "  (unrecoverable error)");
70767981Seric 			else if (bitset(QRELAYED, q->q_flags))
70867981Seric 				strcat(buf, "  (relayed to non-DSN-aware mailer)");
70967880Seric 			else if (bitset(QSENT, q->q_flags))
71067880Seric 				strcat(buf, "  (successfully delivered)");
71163787Seric 			else
71263849Seric 				strcat(buf, "  (transient failure)");
71365870Seric 			putline(buf, mci);
71463849Seric 			if (q->q_alias != NULL)
71563849Seric 			{
71663849Seric 				strcpy(buf, "    (expanded from: ");
71763849Seric 				strcat(buf, q->q_alias->q_paddr);
71863849Seric 				strcat(buf, ")");
71965870Seric 				putline(buf, mci);
72063849Seric 			}
72159082Seric 		}
72259082Seric 	}
72359082Seric 	if (!printheader)
72465870Seric 		putline("\n", mci);
72559082Seric 
72659082Seric 	/*
7279057Seric 	**  Output transcript of errors
7289057Seric 	*/
7299057Seric 
7304086Seric 	(void) fflush(stdout);
7319542Seric 	p = queuename(e->e_parent, 'x');
7329337Seric 	if ((xfile = fopen(p, "r")) == NULL)
7339057Seric 	{
7349337Seric 		syserr("Cannot open %s", p);
73565870Seric 		putline("   ----- Transcript of session is unavailable -----\n", mci);
7369057Seric 	}
7379057Seric 	else
7389057Seric 	{
73965870Seric 		putline("   ----- Transcript of session follows -----\n", mci);
7409542Seric 		if (e->e_xfp != NULL)
7419542Seric 			(void) fflush(e->e_xfp);
7429057Seric 		while (fgets(buf, sizeof buf, xfile) != NULL)
74365870Seric 			putline(buf, mci);
74458680Seric 		(void) xfclose(xfile, "errbody xscript", p);
7459057Seric 	}
746297Seric 	errno = 0;
7474318Seric 
74868028Seric #ifdef DSN
7494318Seric 	/*
75067880Seric 	**  Output machine-readable version.
75167880Seric 	*/
75267880Seric 
75367880Seric 	if (e->e_msgboundary != NULL)
75467880Seric 	{
75567880Seric 		putline("", mci);
75667880Seric 		(void) sprintf(buf, "--%s", e->e_msgboundary);
75767880Seric 		putline(buf, mci);
75868085Seric 		putline("Content-Type: message/X-delivery-status-1", mci);
75967880Seric 		putline("", mci);
76067880Seric 
76167880Seric 		/*
76267880Seric 		**  Output per-message information.
76367880Seric 		*/
76467880Seric 
76567963Seric 		/* OMTS from MAIL FROM: line */
76667963Seric 		if (e->e_parent->e_omts != NULL)
76767963Seric 		{
76867963Seric 			(void) sprintf(buf, "Original-MTS-Type: %s",
76967963Seric 				e->e_parent->e_omts);
77067963Seric 			putline(buf, mci);
77167963Seric 		}
77267880Seric 
77367880Seric 		/* original envelope id from MAIL FROM: line */
77467880Seric 		if (e->e_parent->e_envid != NULL)
77567880Seric 		{
77667880Seric 			(void) sprintf(buf, "Original-Envelope-Id: %s",
77767880Seric 				e->e_parent->e_envid);
77867880Seric 			putline(buf, mci);
77967880Seric 		}
78067880Seric 
78167963Seric 		/* Final-MTS-Type: is required -- our type */
78267996Seric 		if (e->e_parent->e_from.q_mailer->m_mtstype == NULL)
78367996Seric 			putline("Final-MTS-Type: Internet", mci);
78467996Seric 		else
78567996Seric 		{
78667996Seric 			(void) sprintf(buf, "Final-MTS-Type: %s",
78767996Seric 				e->e_parent->e_from.q_mailer->m_mtstype);
78867996Seric 			putline(buf, mci);
78967996Seric 		}
79067880Seric 
79167880Seric 		/* Final-MTA: seems silly -- this is in the From: line */
79267880Seric 		(void) sprintf(buf, "Final-MTA: %s", MyHostName);
79367880Seric 		putline(buf, mci);
79467880Seric 
79567963Seric 		/* Received-From: shows where we got this message from */
79667990Seric 		if (RealHostName != NULL)
79767990Seric 		{
79867990Seric 			(void) sprintf(buf, "Received-From: %s", RealHostName);
79967990Seric 			putline(buf, mci);
80067990Seric 		}
80167963Seric 
80267963Seric 		/* Arrival-Date: -- when it arrived here */
80367963Seric 		(void) sprintf(buf, "Arrival-Date: %s",
80467963Seric 			arpadate(ctime(&e->e_parent->e_ctime)));
80567963Seric 		putline(buf, mci);
80667963Seric 
80767880Seric 		/*
80867880Seric 		**  Output per-address information.
80967880Seric 		*/
81067880Seric 
81167880Seric 		for (q = e->e_parent->e_sendqueue; q != NULL; q = q->q_next)
81267880Seric 		{
81367880Seric 			register ADDRESS *r;
81467880Seric 
81567880Seric 			if (!bitset(QBADADDR|QREPORT|QRELAYED, q->q_flags))
81667880Seric 				continue;
81767880Seric 			putline("", mci);
81867880Seric 
81967998Seric 			/* Recipient: -- use name of alias */
82067998Seric 			r = q;
82167998Seric 			if (r->q_alias != NULL)
82267998Seric 				r = r->q_alias;
82367998Seric 			p = r->q_user;
82467998Seric 			if (strchr(p, '@') == NULL)
82567998Seric 				(void) sprintf(buf, "Recipient: %s@%s",
82667998Seric 					p, MyHostName);
82767998Seric 			else
82867998Seric 				(void) sprintf(buf, "Recipient: %s",
82967998Seric 					p);
83067880Seric 			putline(buf, mci);
83167880Seric 
83267880Seric 			/* Action: -- what happened? */
83367880Seric 			if (bitset(QBADADDR, q->q_flags))
83467880Seric 				putline("Action: failed", mci);
83567880Seric 			else if (bitset(QQUEUEUP, q->q_flags))
83667880Seric 				putline("Action: delayed", mci);
83767880Seric 			else if (bitset(QRELAYED, q->q_flags))
83867880Seric 				putline("Action: relayed", mci);
83967880Seric 			else
84067880Seric 				putline("Action: delivered", mci);
84167880Seric 
84267880Seric 			/* Status: -- what _really_ happened? */
84367880Seric 			strcpy(buf, "Status: ");
84467998Seric 			if (q->q_status == NULL)
84567998Seric 				q->q_status = q->q_fstatus;
84667880Seric 			if (q->q_status != NULL)
84767880Seric 				strcat(buf, q->q_status);
84867880Seric 			else if (bitset(QBADADDR, q->q_flags))
84967880Seric 				strcat(buf, "500");
85067880Seric 			else if (bitset(QQUEUEUP, q->q_flags))
85167880Seric 				strcat(buf, "400");
85267880Seric 			else if (bitset(QRELAYED, q->q_flags))
85367880Seric 				strcat(buf, "601");
85467880Seric 			else
85567880Seric 				strcat(buf, "200");
85667880Seric 			putline(buf, mci);
85767880Seric 
85867880Seric 			/* Date: -- fine granularity */
85967880Seric 			if (q->q_statdate == (time_t) 0L)
86067880Seric 				q->q_statdate = curtime();
86167880Seric 			(void) sprintf(buf, "Date: %s",
86267880Seric 				arpadate(ctime(&q->q_statdate)));
86367880Seric 			putline(buf, mci);
86467880Seric 
86567880Seric 			/* Final-Log-Id: -- why isn't this per-message? */
86667880Seric 			(void) sprintf(buf, "Final-Log-Id: %s", e->e_id);
86767880Seric 			putline(buf, mci);
86867880Seric 
86967963Seric 			/* Expiry-Date: -- for delayed messages only */
87067963Seric 			if (bitset(QQUEUEUP, q->q_flags) &&
87167963Seric 			    !bitset(QBADADDR, q->q_flags))
87267963Seric 			{
87367963Seric 				time_t xdate;
87467963Seric 
87567963Seric 				xdate = e->e_ctime + TimeOuts.to_q_return[e->e_timeoutclass];
87667963Seric 				sprintf(buf, "Expiry-Date: %s",
87767963Seric 					arpadate(ctime(&xdate)));
87867963Seric 				putline(buf, mci);
87967963Seric 			}
88067963Seric 
88167990Seric 			/* Original-Recipient: -- passed from on high */
88267880Seric 			if (q->q_orcpt != NULL)
88367880Seric 			{
88467990Seric 				(void) sprintf(buf, "Original-Recipient: %s",
88567880Seric 					q->q_orcpt);
88667880Seric 				putline(buf, mci);
88767880Seric 			}
88867880Seric 
88967998Seric 			/* Final-Recipient: -- the name from the RCPT command */
89067998Seric 			for (r = q; r->q_alias != NULL; r = r->q_alias)
89167998Seric 				continue;
89268003Seric 			if (strchr(r->q_user, '@') == NULL)
89368003Seric 				(void) sprintf(buf, "Final-Recipient: %s@%s",
89468003Seric 					r->q_user, MyHostName);
89568003Seric 			else
89668003Seric 				(void) sprintf(buf, "Final-Recipient: %s",
89768003Seric 					r->q_user);
89867998Seric 			putline(buf, mci);
89967880Seric 
90067880Seric 			/* Final-Status: -- same as Status?  XXX */
90167998Seric 			if (q->q_fstatus != NULL && q->q_fstatus != q->q_status)
90267990Seric 			{
90367990Seric 				(void) sprintf(buf, "Final-Status: %s",
90467990Seric 					q->q_fstatus);
90567990Seric 				putline(buf, mci);
90667990Seric 			}
90767880Seric 
90867996Seric 			/* Remote-MTS-Type: -- depends on mailer */
90967990Seric 			if (q->q_mailer->m_mtstype != NULL)
91067990Seric 			{
91167990Seric 				(void) sprintf(buf, "Remote-MTS-Type: %s",
91267990Seric 					q->q_mailer->m_mtstype);
91367990Seric 				putline(buf, mci);
91467990Seric 			}
91567880Seric 
91667880Seric 			/* Remote-MTA: -- who was I talking to? */
91767880Seric 			if (q->q_statmta != NULL)
91867880Seric 			{
91967880Seric 				(void) sprintf(buf, "Remote-MTA: %s",
92067880Seric 					q->q_statmta);
92167880Seric 				putline(buf, mci);
92267880Seric 			}
92367998Seric 			else if (q->q_host != NULL)
92467998Seric 			{
92567998Seric 				(void) sprintf(buf, "Remote-MTA: %s",
92667998Seric 					q->q_host);
92767998Seric 				putline(buf, mci);
92867998Seric 			}
92967880Seric 
93067998Seric 			/* Remote-Recipient: -- recipient passed to far end */
93167998Seric 			if (strcmp(q->q_user, r->q_paddr) != 0)
93267990Seric 			{
93367990Seric 				(void) sprintf(buf, "Remote-Recipient: %s",
93467990Seric 					q->q_user);
93567990Seric 				putline(buf, mci);
93667990Seric 			}
93767880Seric 
93867990Seric 			/* Remote-Status: -- return code from remote mailer */
93967990Seric 			if (q->q_rstatus != NULL)
94067990Seric 			{
94167990Seric 				(void) sprintf(buf, "Remote-Status: %s",
94267990Seric 					q->q_rstatus);
94367990Seric 				putline(buf, mci);
94467990Seric 			}
94567880Seric 		}
94667880Seric 	}
94768028Seric #endif
94867880Seric 
94967880Seric 	/*
9504318Seric 	**  Output text of original message
9514318Seric 	*/
9524318Seric 
95367880Seric 	if (bitset(EF_NORETURN, e->e_parent->e_flags))
95458665Seric 		SendBody = FALSE;
95567937Seric 	if (!SendBody && e->e_msgboundary != NULL)
95667937Seric 		pflags |= PF_DELETEMIMEHDRS;
95765870Seric 	putline("", mci);
95858680Seric 	if (e->e_parent->e_df != NULL)
9594199Seric 	{
96067880Seric 		if (e->e_msgboundary == NULL)
96167880Seric 		{
96267880Seric 			if (SendBody)
96367880Seric 				putline("   ----- Original message follows -----\n", mci);
96467880Seric 			else
96567880Seric 				putline("   ----- Message header follows -----\n", mci);
96667880Seric 			(void) fflush(mci->mci_out);
96767880Seric 		}
9685984Seric 		else
9695984Seric 		{
97059730Seric 			(void) sprintf(buf, "--%s", e->e_msgboundary);
97165870Seric 			putline(buf, mci);
97265870Seric 			putline("Content-Type: message/rfc822", mci);
9735984Seric 		}
97467981Seric 		putline("", mci);
97567936Seric 		putheader(mci, e->e_parent->e_header, e->e_parent, pflags);
97659730Seric 		if (SendBody)
97767936Seric 			putbody(mci, e->e_parent, e->e_msgboundary, pflags);
97859987Seric 		else
97967546Seric 		{
98067546Seric 			putline("", mci);
98165870Seric 			putline("   ----- Message body suppressed -----", mci);
98267546Seric 		}
9834199Seric 	}
9844199Seric 	else
98510170Seric 	{
98665870Seric 		putline("  ----- No message was collected -----\n", mci);
98710170Seric 	}
9884318Seric 
98960010Seric 	if (e->e_msgboundary != NULL)
99060010Seric 	{
99165870Seric 		putline("", mci);
99260010Seric 		(void) sprintf(buf, "--%s--", e->e_msgboundary);
99365870Seric 		putline(buf, mci);
99460010Seric 	}
99565870Seric 	putline("", mci);
99659730Seric 
9974318Seric 	/*
9984318Seric 	**  Cleanup and exit
9994318Seric 	*/
10004318Seric 
1001297Seric 	if (errno != 0)
10026978Seric 		syserr("errbody: I/O error");
1003297Seric }
100458144Seric /*
100558144Seric **  PRUNEROUTE -- prune an RFC-822 source route
100658144Seric **
100758144Seric **	Trims down a source route to the last internet-registered hop.
100858144Seric **	This is encouraged by RFC 1123 section 5.3.3.
100958144Seric **
101058144Seric **	Parameters:
101158144Seric **		addr -- the address
101258144Seric **
101358144Seric **	Returns:
101458144Seric **		TRUE -- address was modified
101558144Seric **		FALSE -- address could not be pruned
101658144Seric **
101758144Seric **	Side Effects:
101858144Seric **		modifies addr in-place
101958144Seric */
102058144Seric 
102158144Seric pruneroute(addr)
102258144Seric 	char *addr;
102358144Seric {
102466334Seric #if NAMED_BIND
102558144Seric 	char *start, *at, *comma;
102658144Seric 	char c;
102758144Seric 	int rcode;
102858144Seric 	char hostbuf[BUFSIZ];
102958144Seric 	char *mxhosts[MAXMXHOSTS + 1];
103058144Seric 
103158144Seric 	/* check to see if this is really a route-addr */
103258144Seric 	if (*addr != '<' || addr[1] != '@' || addr[strlen(addr) - 1] != '>')
103358144Seric 		return FALSE;
103458144Seric 	start = strchr(addr, ':');
103558144Seric 	at = strrchr(addr, '@');
103658144Seric 	if (start == NULL || at == NULL || at < start)
103758144Seric 		return FALSE;
103858144Seric 
103958144Seric 	/* slice off the angle brackets */
104058144Seric 	strcpy(hostbuf, at + 1);
104158144Seric 	hostbuf[strlen(hostbuf) - 1] = '\0';
104258144Seric 
104358144Seric 	while (start)
104458144Seric 	{
104559273Seric 		if (getmxrr(hostbuf, mxhosts, FALSE, &rcode) > 0)
104658144Seric 		{
104758144Seric 			strcpy(addr + 1, start + 1);
104858144Seric 			return TRUE;
104958144Seric 		}
105058144Seric 		c = *start;
105158144Seric 		*start = '\0';
105258144Seric 		comma = strrchr(addr, ',');
105358144Seric 		if (comma && comma[1] == '@')
105458144Seric 			strcpy(hostbuf, comma + 2);
105558144Seric 		else
105658144Seric 			comma = 0;
105758144Seric 		*start = c;
105858144Seric 		start = comma;
105958144Seric 	}
106058144Seric #endif
106158144Seric 	return FALSE;
106258144Seric }
1063