1 /*
2 * Copyright (c) 1998-2004, 2006, 2007 Proofpoint, Inc. and its suppliers.
3 * All rights reserved.
4 * Copyright (c) 1983, 1995-1997 Eric P. Allman. All rights reserved.
5 * Copyright (c) 1988, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * By using this file, you agree to the terms and conditions set
9 * forth in the LICENSE file which can be found at the top level of
10 * the sendmail distribution.
11 *
12 */
13
14 #include <sendmail.h>
15 #include <sm/sendmail.h>
16
17 SM_RCSID("@(#)$Id: headers.c,v 8.320 2013-11-22 20:51:55 ca Exp $")
18
19 static HDR *allocheader __P((char *, char *, int, SM_RPOOL_T *, bool));
20 static size_t fix_mime_header __P((HDR *, ENVELOPE *));
21 static int priencode __P((char *));
22 static bool put_vanilla_header __P((HDR *, char *, MCI *));
23
24 /*
25 ** SETUPHEADERS -- initialize headers in symbol table
26 **
27 ** Parameters:
28 ** none
29 **
30 ** Returns:
31 ** none
32 */
33
34 void
setupheaders()35 setupheaders()
36 {
37 struct hdrinfo *hi;
38 STAB *s;
39
40 for (hi = HdrInfo; hi->hi_field != NULL; hi++)
41 {
42 s = stab(hi->hi_field, ST_HEADER, ST_ENTER);
43 s->s_header.hi_flags = hi->hi_flags;
44 s->s_header.hi_ruleset = NULL;
45 }
46 }
47
48 /*
49 ** DOCHOMPHEADER -- process and save a header line.
50 **
51 ** Called by chompheader.
52 **
53 ** Parameters:
54 ** line -- header as a text line.
55 ** pflag -- flags for chompheader() (from sendmail.h)
56 ** hdrp -- a pointer to the place to save the header.
57 ** e -- the envelope including this header.
58 **
59 ** Returns:
60 ** flags for this header.
61 **
62 ** Side Effects:
63 ** The header is saved on the header list.
64 ** Contents of 'line' are destroyed.
65 */
66
67 static struct hdrinfo NormalHeader = { NULL, 0, NULL };
68 static unsigned long dochompheader __P((char *, int, HDR **, ENVELOPE *));
69
70 static unsigned long
dochompheader(line,pflag,hdrp,e)71 dochompheader(line, pflag, hdrp, e)
72 char *line;
73 int pflag;
74 HDR **hdrp;
75 ENVELOPE *e;
76 {
77 unsigned char mid = '\0';
78 register char *p;
79 register HDR *h;
80 HDR **hp;
81 char *fname;
82 char *fvalue;
83 bool cond = false;
84 bool dropfrom;
85 bool headeronly;
86 STAB *s;
87 struct hdrinfo *hi;
88 bool nullheader = false;
89 BITMAP256 mopts;
90
91 headeronly = hdrp != NULL;
92 if (!headeronly)
93 hdrp = &e->e_header;
94
95 /* strip off options */
96 clrbitmap(mopts);
97 p = line;
98 if (!bitset(pflag, CHHDR_USER) && *p == '?')
99 {
100 int c;
101 register char *q;
102
103 q = strchr(++p, '?');
104 if (q == NULL)
105 goto hse;
106
107 *q = '\0';
108 c = *p & 0377;
109
110 /* possibly macro conditional */
111 if (c == MACROEXPAND)
112 {
113 /* catch ?$? */
114 if (*++p == '\0')
115 {
116 *q = '?';
117 goto hse;
118 }
119
120 mid = (unsigned char) *p++;
121
122 /* catch ?$abc? */
123 if (*p != '\0')
124 {
125 *q = '?';
126 goto hse;
127 }
128 }
129 else if (*p == '$')
130 {
131 /* catch ?$? */
132 if (*++p == '\0')
133 {
134 *q = '?';
135 goto hse;
136 }
137
138 mid = (unsigned char) macid(p);
139 if (bitset(0200, mid))
140 {
141 p += strlen(macname(mid)) + 2;
142 SM_ASSERT(p <= q);
143 }
144 else
145 p++;
146
147 /* catch ?$abc? */
148 if (*p != '\0')
149 {
150 *q = '?';
151 goto hse;
152 }
153 }
154 else
155 {
156 while (*p != '\0')
157 {
158 if (!isascii(*p))
159 {
160 *q = '?';
161 goto hse;
162 }
163
164 setbitn(bitidx(*p), mopts);
165 cond = true;
166 p++;
167 }
168 }
169 p = q + 1;
170 }
171
172 /* find canonical name */
173 fname = p;
174 while (isascii(*p) && isgraph(*p) && *p != ':')
175 p++;
176 fvalue = p;
177 while (isascii(*p) && isspace(*p))
178 p++;
179 if (*p++ != ':' || fname == fvalue)
180 {
181 hse:
182 syserr("553 5.3.0 header syntax error, line \"%s\"", line);
183 return 0;
184 }
185 *fvalue = '\0';
186 fvalue = p;
187
188 /* if the field is null, go ahead and use the default */
189 while (isascii(*p) && isspace(*p))
190 p++;
191 if (*p == '\0')
192 nullheader = true;
193
194 /* security scan: long field names are end-of-header */
195 if (strlen(fname) > 100)
196 return H_EOH;
197
198 /* check to see if it represents a ruleset call */
199 if (bitset(pflag, CHHDR_DEF))
200 {
201 char hbuf[50];
202
203 (void) expand(fvalue, hbuf, sizeof(hbuf), e);
204 for (p = hbuf; isascii(*p) && isspace(*p); )
205 p++;
206 if ((*p++ & 0377) == CALLSUBR)
207 {
208 auto char *endp;
209 bool strc;
210
211 strc = *p == '+'; /* strip comments? */
212 if (strc)
213 ++p;
214 if (strtorwset(p, &endp, ST_ENTER) > 0)
215 {
216 *endp = '\0';
217 s = stab(fname, ST_HEADER, ST_ENTER);
218 if (LogLevel > 9 &&
219 s->s_header.hi_ruleset != NULL)
220 sm_syslog(LOG_WARNING, NOQID,
221 "Warning: redefined ruleset for header=%s, old=%s, new=%s",
222 fname,
223 s->s_header.hi_ruleset, p);
224 s->s_header.hi_ruleset = newstr(p);
225 if (!strc)
226 s->s_header.hi_flags |= H_STRIPCOMM;
227 }
228 return 0;
229 }
230 }
231
232 /* see if it is a known type */
233 s = stab(fname, ST_HEADER, ST_FIND);
234 if (s != NULL)
235 hi = &s->s_header;
236 else
237 hi = &NormalHeader;
238
239 if (tTd(31, 9))
240 {
241 if (s == NULL)
242 sm_dprintf("no header flags match\n");
243 else
244 sm_dprintf("header match, flags=%lx, ruleset=%s\n",
245 hi->hi_flags,
246 hi->hi_ruleset == NULL ? "<NULL>"
247 : hi->hi_ruleset);
248 }
249
250 /* see if this is a resent message */
251 if (!bitset(pflag, CHHDR_DEF) && !headeronly &&
252 bitset(H_RESENT, hi->hi_flags))
253 e->e_flags |= EF_RESENT;
254
255 /* if this is an Errors-To: header keep track of it now */
256 if (UseErrorsTo && !bitset(pflag, CHHDR_DEF) && !headeronly &&
257 bitset(H_ERRORSTO, hi->hi_flags))
258 (void) sendtolist(fvalue, NULLADDR, &e->e_errorqueue, 0, e);
259
260 /* if this means "end of header" quit now */
261 if (!headeronly && bitset(H_EOH, hi->hi_flags))
262 return hi->hi_flags;
263
264 /*
265 ** Horrible hack to work around problem with Lotus Notes SMTP
266 ** mail gateway, which generates From: headers with newlines in
267 ** them and the <address> on the second line. Although this is
268 ** legal RFC 822, many MUAs don't handle this properly and thus
269 ** never find the actual address.
270 */
271
272 if (bitset(H_FROM, hi->hi_flags) && SingleLineFromHeader)
273 {
274 while ((p = strchr(fvalue, '\n')) != NULL)
275 *p = ' ';
276 }
277
278 /*
279 ** If there is a check ruleset, verify it against the header.
280 */
281
282 if (bitset(pflag, CHHDR_CHECK))
283 {
284 int rscheckflags;
285 char *rs;
286
287 rscheckflags = RSF_COUNT;
288 if (!bitset(hi->hi_flags, H_FROM|H_RCPT))
289 rscheckflags |= RSF_UNSTRUCTURED;
290
291 /* no ruleset? look for default */
292 rs = hi->hi_ruleset;
293 if (rs == NULL)
294 {
295 s = stab("*", ST_HEADER, ST_FIND);
296 if (s != NULL)
297 {
298 rs = (&s->s_header)->hi_ruleset;
299 if (bitset((&s->s_header)->hi_flags,
300 H_STRIPCOMM))
301 rscheckflags |= RSF_RMCOMM;
302 }
303 }
304 else if (bitset(hi->hi_flags, H_STRIPCOMM))
305 rscheckflags |= RSF_RMCOMM;
306 if (rs != NULL)
307 {
308 int l, k;
309 char qval[MAXNAME];
310
311 l = 0;
312 qval[l++] = '"';
313
314 /* - 3 to avoid problems with " at the end */
315 /* should be sizeof(qval), not MAXNAME */
316 for (k = 0; fvalue[k] != '\0' && l < MAXNAME - 3; k++)
317 {
318 switch (fvalue[k])
319 {
320 /* XXX other control chars? */
321 case '\011': /* ht */
322 case '\012': /* nl */
323 case '\013': /* vt */
324 case '\014': /* np */
325 case '\015': /* cr */
326 qval[l++] = ' ';
327 break;
328 case '"':
329 qval[l++] = '\\';
330 /* FALLTHROUGH */
331 default:
332 qval[l++] = fvalue[k];
333 break;
334 }
335 }
336 qval[l++] = '"';
337 qval[l] = '\0';
338 k += strlen(fvalue + k);
339 if (k >= MAXNAME)
340 {
341 if (LogLevel > 9)
342 sm_syslog(LOG_WARNING, e->e_id,
343 "Warning: truncated header '%s' before check with '%s' len=%d max=%d",
344 fname, rs, k, MAXNAME - 1);
345 }
346 macdefine(&e->e_macro, A_TEMP,
347 macid("{currHeader}"), qval);
348 macdefine(&e->e_macro, A_TEMP,
349 macid("{hdr_name}"), fname);
350
351 (void) sm_snprintf(qval, sizeof(qval), "%d", k);
352 macdefine(&e->e_macro, A_TEMP, macid("{hdrlen}"), qval);
353 if (bitset(H_FROM, hi->hi_flags))
354 macdefine(&e->e_macro, A_PERM,
355 macid("{addr_type}"), "h s");
356 else if (bitset(H_RCPT, hi->hi_flags))
357 macdefine(&e->e_macro, A_PERM,
358 macid("{addr_type}"), "h r");
359 else
360 macdefine(&e->e_macro, A_PERM,
361 macid("{addr_type}"), "h");
362 (void) rscheck(rs, fvalue, NULL, e, rscheckflags, 3,
363 NULL, e->e_id, NULL);
364 }
365 }
366
367 /*
368 ** Drop explicit From: if same as what we would generate.
369 ** This is to make MH (which doesn't always give a full name)
370 ** insert the full name information in all circumstances.
371 */
372
373 dropfrom = false;
374 p = "resent-from";
375 if (!bitset(EF_RESENT, e->e_flags))
376 p += 7;
377 if (!bitset(pflag, CHHDR_DEF) && !headeronly &&
378 !bitset(EF_QUEUERUN, e->e_flags) && sm_strcasecmp(fname, p) == 0)
379 {
380 if (e->e_from.q_paddr != NULL &&
381 e->e_from.q_mailer != NULL &&
382 bitnset(M_LOCALMAILER, e->e_from.q_mailer->m_flags) &&
383 (strcmp(fvalue, e->e_from.q_paddr) == 0 ||
384 strcmp(fvalue, e->e_from.q_user) == 0))
385 dropfrom = true;
386 if (tTd(31, 2))
387 {
388 sm_dprintf("comparing header from (%s) against default (%s or %s), drop=%d\n",
389 fvalue, e->e_from.q_paddr, e->e_from.q_user,
390 dropfrom);
391 }
392 }
393
394 /* delete default value for this header */
395 for (hp = hdrp; (h = *hp) != NULL; hp = &h->h_link)
396 {
397 if (sm_strcasecmp(fname, h->h_field) == 0 &&
398 !bitset(H_USER, h->h_flags) &&
399 !bitset(H_FORCE, h->h_flags))
400 {
401 if (nullheader)
402 {
403 /* user-supplied value was null */
404 return 0;
405 }
406 if (dropfrom)
407 {
408 /* make this look like the user entered it */
409 h->h_flags |= H_USER;
410
411 /*
412 ** If the MH hack is selected, allow to turn
413 ** it off via a mailer flag to avoid problems
414 ** with setups that remove the F flag from
415 ** the RCPT mailer.
416 */
417
418 if (bitnset(M_NOMHHACK,
419 e->e_from.q_mailer->m_flags))
420 {
421 h->h_flags &= ~H_CHECK;
422 }
423 return hi->hi_flags;
424 }
425 h->h_value = NULL;
426 if (!cond)
427 {
428 /* copy conditions from default case */
429 memmove((char *) mopts, (char *) h->h_mflags,
430 sizeof(mopts));
431 }
432 h->h_macro = mid;
433 }
434 }
435
436 /* create a new node */
437 h = (HDR *) sm_rpool_malloc_x(e->e_rpool, sizeof(*h));
438 h->h_field = sm_rpool_strdup_x(e->e_rpool, fname);
439 h->h_value = sm_rpool_strdup_x(e->e_rpool, fvalue);
440 h->h_link = NULL;
441 memmove((char *) h->h_mflags, (char *) mopts, sizeof(mopts));
442 h->h_macro = mid;
443 *hp = h;
444 h->h_flags = hi->hi_flags;
445 if (bitset(pflag, CHHDR_USER) || bitset(pflag, CHHDR_QUEUE))
446 h->h_flags |= H_USER;
447
448 /* strip EOH flag if parsing MIME headers */
449 if (headeronly)
450 h->h_flags &= ~H_EOH;
451 if (bitset(pflag, CHHDR_DEF))
452 h->h_flags |= H_DEFAULT;
453 if (cond || mid != '\0')
454 h->h_flags |= H_CHECK;
455
456 /* hack to see if this is a new format message */
457 if (!bitset(pflag, CHHDR_DEF) && !headeronly &&
458 bitset(H_RCPT|H_FROM, h->h_flags) &&
459 (strchr(fvalue, ',') != NULL || strchr(fvalue, '(') != NULL ||
460 strchr(fvalue, '<') != NULL || strchr(fvalue, ';') != NULL))
461 {
462 e->e_flags &= ~EF_OLDSTYLE;
463 }
464
465 return h->h_flags;
466 }
467
468 /*
469 ** CHOMPHEADER -- process and save a header line.
470 **
471 ** Called by collect, readcf, and readqf to deal with header lines.
472 ** This is just a wrapper for dochompheader().
473 **
474 ** Parameters:
475 ** line -- header as a text line.
476 ** pflag -- flags for chompheader() (from sendmail.h)
477 ** hdrp -- a pointer to the place to save the header.
478 ** e -- the envelope including this header.
479 **
480 ** Returns:
481 ** flags for this header.
482 **
483 ** Side Effects:
484 ** The header is saved on the header list.
485 ** Contents of 'line' are destroyed.
486 */
487
488
489 unsigned long
chompheader(line,pflag,hdrp,e)490 chompheader(line, pflag, hdrp, e)
491 char *line;
492 int pflag;
493 HDR **hdrp;
494 register ENVELOPE *e;
495 {
496 unsigned long rval;
497
498 if (tTd(31, 6))
499 {
500 sm_dprintf("chompheader: ");
501 xputs(sm_debug_file(), line);
502 sm_dprintf("\n");
503 }
504
505 /* quote this if user (not config file) input */
506 if (bitset(pflag, CHHDR_USER))
507 {
508 char xbuf[MAXLINE];
509 char *xbp = NULL;
510 int xbufs;
511
512 xbufs = sizeof(xbuf);
513 xbp = quote_internal_chars(line, xbuf, &xbufs);
514 if (tTd(31, 7))
515 {
516 sm_dprintf("chompheader: quoted: ");
517 xputs(sm_debug_file(), xbp);
518 sm_dprintf("\n");
519 }
520 rval = dochompheader(xbp, pflag, hdrp, e);
521 if (xbp != xbuf)
522 sm_free(xbp);
523 }
524 else
525 rval = dochompheader(line, pflag, hdrp, e);
526
527 return rval;
528 }
529
530 /*
531 ** ALLOCHEADER -- allocate a header entry
532 **
533 ** Parameters:
534 ** field -- the name of the header field (will not be copied).
535 ** value -- the value of the field (will be copied).
536 ** flags -- flags to add to h_flags.
537 ** rp -- resource pool for allocations
538 ** space -- add leading space?
539 **
540 ** Returns:
541 ** Pointer to a newly allocated and populated HDR.
542 **
543 ** Notes:
544 ** o field and value must be in internal format, i.e.,
545 ** metacharacters must be "quoted", see quote_internal_chars().
546 ** o maybe add more flags to decide:
547 ** - what to copy (field/value)
548 ** - whether to convert value to an internal format
549 */
550
551 static HDR *
allocheader(field,value,flags,rp,space)552 allocheader(field, value, flags, rp, space)
553 char *field;
554 char *value;
555 int flags;
556 SM_RPOOL_T *rp;
557 bool space;
558 {
559 HDR *h;
560 STAB *s;
561
562 /* find info struct */
563 s = stab(field, ST_HEADER, ST_FIND);
564
565 /* allocate space for new header */
566 h = (HDR *) sm_rpool_malloc_x(rp, sizeof(*h));
567 h->h_field = field;
568 if (space)
569 {
570 size_t l;
571 char *n;
572
573 l = strlen(value);
574 SM_ASSERT(l + 2 > l);
575 n = sm_rpool_malloc_x(rp, l + 2);
576 n[0] = ' ';
577 n[1] = '\0';
578 sm_strlcpy(n + 1, value, l + 1);
579 h->h_value = n;
580 }
581 else
582 h->h_value = sm_rpool_strdup_x(rp, value);
583 h->h_flags = flags;
584 if (s != NULL)
585 h->h_flags |= s->s_header.hi_flags;
586 clrbitmap(h->h_mflags);
587 h->h_macro = '\0';
588
589 return h;
590 }
591
592 /*
593 ** ADDHEADER -- add a header entry to the end of the queue.
594 **
595 ** This bypasses the special checking of chompheader.
596 **
597 ** Parameters:
598 ** field -- the name of the header field (will not be copied).
599 ** value -- the value of the field (will be copied).
600 ** flags -- flags to add to h_flags.
601 ** e -- envelope.
602 ** space -- add leading space?
603 **
604 ** Returns:
605 ** none.
606 **
607 ** Side Effects:
608 ** adds the field on the list of headers for this envelope.
609 **
610 ** Notes: field and value must be in internal format, i.e.,
611 ** metacharacters must be "quoted", see quote_internal_chars().
612 */
613
614 void
addheader(field,value,flags,e,space)615 addheader(field, value, flags, e, space)
616 char *field;
617 char *value;
618 int flags;
619 ENVELOPE *e;
620 bool space;
621 {
622 register HDR *h;
623 HDR **hp;
624 HDR **hdrlist = &e->e_header;
625
626 /* find current place in list -- keep back pointer? */
627 for (hp = hdrlist; (h = *hp) != NULL; hp = &h->h_link)
628 {
629 if (sm_strcasecmp(field, h->h_field) == 0)
630 break;
631 }
632
633 /* allocate space for new header */
634 h = allocheader(field, value, flags, e->e_rpool, space);
635 h->h_link = *hp;
636 *hp = h;
637 }
638
639 /*
640 ** INSHEADER -- insert a header entry at the specified index
641 ** This bypasses the special checking of chompheader.
642 **
643 ** Parameters:
644 ** idx -- index into the header list at which to insert
645 ** field -- the name of the header field (will be copied).
646 ** value -- the value of the field (will be copied).
647 ** flags -- flags to add to h_flags.
648 ** e -- envelope.
649 ** space -- add leading space?
650 **
651 ** Returns:
652 ** none.
653 **
654 ** Side Effects:
655 ** inserts the field on the list of headers for this envelope.
656 **
657 ** Notes:
658 ** - field and value must be in internal format, i.e.,
659 ** metacharacters must be "quoted", see quote_internal_chars().
660 ** - the header list contains headers that might not be
661 ** sent "out" (see putheader(): "skip"), hence there is no
662 ** reliable way to insert a header at an exact position
663 ** (except at the front or end).
664 */
665
666 void
insheader(idx,field,value,flags,e,space)667 insheader(idx, field, value, flags, e, space)
668 int idx;
669 char *field;
670 char *value;
671 int flags;
672 ENVELOPE *e;
673 bool space;
674 {
675 HDR *h, *srch, *last = NULL;
676
677 /* allocate space for new header */
678 h = allocheader(field, value, flags, e->e_rpool, space);
679
680 /* find insertion position */
681 for (srch = e->e_header; srch != NULL && idx > 0;
682 srch = srch->h_link, idx--)
683 last = srch;
684
685 if (e->e_header == NULL)
686 {
687 e->e_header = h;
688 h->h_link = NULL;
689 }
690 else if (srch == NULL)
691 {
692 SM_ASSERT(last != NULL);
693 last->h_link = h;
694 h->h_link = NULL;
695 }
696 else
697 {
698 h->h_link = srch->h_link;
699 srch->h_link = h;
700 }
701 }
702
703 /*
704 ** HVALUE -- return value of a header.
705 **
706 ** Only "real" fields (i.e., ones that have not been supplied
707 ** as a default) are used.
708 **
709 ** Parameters:
710 ** field -- the field name.
711 ** header -- the header list.
712 **
713 ** Returns:
714 ** pointer to the value part (internal format).
715 ** NULL if not found.
716 **
717 ** Side Effects:
718 ** none.
719 */
720
721 char *
hvalue(field,header)722 hvalue(field, header)
723 char *field;
724 HDR *header;
725 {
726 register HDR *h;
727
728 for (h = header; h != NULL; h = h->h_link)
729 {
730 if (!bitset(H_DEFAULT, h->h_flags) &&
731 sm_strcasecmp(h->h_field, field) == 0)
732 {
733 char *s;
734
735 s = h->h_value;
736 if (s == NULL)
737 return NULL;
738 while (isascii(*s) && isspace(*s))
739 s++;
740 return s;
741 }
742 }
743 return NULL;
744 }
745
746 /*
747 ** ISHEADER -- predicate telling if argument is a header.
748 **
749 ** A line is a header if it has a single word followed by
750 ** optional white space followed by a colon.
751 **
752 ** Header fields beginning with two dashes, although technically
753 ** permitted by RFC822, are automatically rejected in order
754 ** to make MIME work out. Without this we could have a technically
755 ** legal header such as ``--"foo:bar"'' that would also be a legal
756 ** MIME separator.
757 **
758 ** Parameters:
759 ** h -- string to check for possible headerness.
760 **
761 ** Returns:
762 ** true if h is a header.
763 ** false otherwise.
764 **
765 ** Side Effects:
766 ** none.
767 */
768
769 bool
isheader(h)770 isheader(h)
771 char *h;
772 {
773 char *s;
774
775 s = h;
776 if (s[0] == '-' && s[1] == '-')
777 return false;
778
779 while (*s > ' ' && *s != ':' && *s != '\0')
780 s++;
781
782 if (h == s)
783 return false;
784
785 /* following technically violates RFC822 */
786 while (isascii(*s) && isspace(*s))
787 s++;
788
789 return (*s == ':');
790 }
791
792 /*
793 ** EATHEADER -- run through the stored header and extract info.
794 **
795 ** Parameters:
796 ** e -- the envelope to process.
797 ** full -- if set, do full processing (e.g., compute
798 ** message priority). This should not be set
799 ** when reading a queue file because some info
800 ** needed to compute the priority is wrong.
801 ** log -- call logsender()?
802 **
803 ** Returns:
804 ** none.
805 **
806 ** Side Effects:
807 ** Sets a bunch of global variables from information
808 ** in the collected header.
809 */
810
811 void
eatheader(e,full,log)812 eatheader(e, full, log)
813 register ENVELOPE *e;
814 bool full;
815 bool log;
816 {
817 register HDR *h;
818 register char *p;
819 int hopcnt = 0;
820 char buf[MAXLINE];
821
822 /*
823 ** Set up macros for possible expansion in headers.
824 */
825
826 macdefine(&e->e_macro, A_PERM, 'f', e->e_sender);
827 macdefine(&e->e_macro, A_PERM, 'g', e->e_sender);
828 if (e->e_origrcpt != NULL && *e->e_origrcpt != '\0')
829 macdefine(&e->e_macro, A_PERM, 'u', e->e_origrcpt);
830 else
831 macdefine(&e->e_macro, A_PERM, 'u', NULL);
832
833 /* full name of from person */
834 p = hvalue("full-name", e->e_header);
835 if (p != NULL)
836 {
837 if (!rfc822_string(p))
838 {
839 /*
840 ** Quote a full name with special characters
841 ** as a comment so crackaddr() doesn't destroy
842 ** the name portion of the address.
843 */
844
845 p = addquotes(p, e->e_rpool);
846 }
847 macdefine(&e->e_macro, A_PERM, 'x', p);
848 }
849
850 if (tTd(32, 1))
851 sm_dprintf("----- collected header -----\n");
852 e->e_msgid = NULL;
853 for (h = e->e_header; h != NULL; h = h->h_link)
854 {
855 if (tTd(32, 1))
856 sm_dprintf("%s:", h->h_field);
857 if (h->h_value == NULL)
858 {
859 if (tTd(32, 1))
860 sm_dprintf("<NULL>\n");
861 continue;
862 }
863
864 /* do early binding */
865 if (bitset(H_DEFAULT, h->h_flags) &&
866 !bitset(H_BINDLATE, h->h_flags))
867 {
868 if (tTd(32, 1))
869 {
870 sm_dprintf("(");
871 xputs(sm_debug_file(), h->h_value);
872 sm_dprintf(") ");
873 }
874 expand(h->h_value, buf, sizeof(buf), e);
875 if (buf[0] != '\0' &&
876 (buf[0] != ' ' || buf[1] != '\0'))
877 {
878 if (bitset(H_FROM, h->h_flags))
879 expand(crackaddr(buf, e),
880 buf, sizeof(buf), e);
881 h->h_value = sm_rpool_strdup_x(e->e_rpool, buf);
882 h->h_flags &= ~H_DEFAULT;
883 }
884 }
885 if (tTd(32, 1))
886 {
887 xputs(sm_debug_file(), h->h_value);
888 sm_dprintf("\n");
889 }
890
891 /* count the number of times it has been processed */
892 if (bitset(H_TRACE, h->h_flags))
893 hopcnt++;
894
895 /* send to this person if we so desire */
896 if (GrabTo && bitset(H_RCPT, h->h_flags) &&
897 !bitset(H_DEFAULT, h->h_flags) &&
898 (!bitset(EF_RESENT, e->e_flags) ||
899 bitset(H_RESENT, h->h_flags)))
900 {
901 #if 0
902 int saveflags = e->e_flags;
903 #endif /* 0 */
904
905 (void) sendtolist(denlstring(h->h_value, true, false),
906 NULLADDR, &e->e_sendqueue, 0, e);
907
908 #if 0
909 /*
910 ** Change functionality so a fatal error on an
911 ** address doesn't affect the entire envelope.
912 */
913
914 /* delete fatal errors generated by this address */
915 if (!bitset(EF_FATALERRS, saveflags))
916 e->e_flags &= ~EF_FATALERRS;
917 #endif /* 0 */
918 }
919
920 /* save the message-id for logging */
921 p = "resent-message-id";
922 if (!bitset(EF_RESENT, e->e_flags))
923 p += 7;
924 if (sm_strcasecmp(h->h_field, p) == 0)
925 {
926 e->e_msgid = h->h_value;
927 while (isascii(*e->e_msgid) && isspace(*e->e_msgid))
928 e->e_msgid++;
929 macdefine(&e->e_macro, A_PERM, macid("{msg_id}"),
930 e->e_msgid);
931 }
932 }
933 if (tTd(32, 1))
934 sm_dprintf("----------------------------\n");
935
936 /* if we are just verifying (that is, sendmail -t -bv), drop out now */
937 if (OpMode == MD_VERIFY)
938 return;
939
940 /* store hop count */
941 if (hopcnt > e->e_hopcount)
942 {
943 e->e_hopcount = hopcnt;
944 (void) sm_snprintf(buf, sizeof(buf), "%d", e->e_hopcount);
945 macdefine(&e->e_macro, A_TEMP, 'c', buf);
946 }
947
948 /* message priority */
949 p = hvalue("precedence", e->e_header);
950 if (p != NULL)
951 e->e_class = priencode(p);
952 if (e->e_class < 0)
953 e->e_timeoutclass = TOC_NONURGENT;
954 else if (e->e_class > 0)
955 e->e_timeoutclass = TOC_URGENT;
956 if (full)
957 {
958 e->e_msgpriority = e->e_msgsize
959 - e->e_class * WkClassFact
960 + e->e_nrcpts * WkRecipFact;
961 }
962
963 /* check for DSN to properly set e_timeoutclass */
964 p = hvalue("content-type", e->e_header);
965 if (p != NULL)
966 {
967 bool oldsupr;
968 char **pvp;
969 char pvpbuf[MAXLINE];
970 extern unsigned char MimeTokenTab[256];
971
972 /* tokenize header */
973 oldsupr = SuprErrs;
974 SuprErrs = true;
975 pvp = prescan(p, '\0', pvpbuf, sizeof(pvpbuf), NULL,
976 MimeTokenTab, false);
977 SuprErrs = oldsupr;
978
979 /* Check if multipart/report */
980 if (pvp != NULL && pvp[0] != NULL &&
981 pvp[1] != NULL && pvp[2] != NULL &&
982 sm_strcasecmp(*pvp++, "multipart") == 0 &&
983 strcmp(*pvp++, "/") == 0 &&
984 sm_strcasecmp(*pvp++, "report") == 0)
985 {
986 /* Look for report-type=delivery-status */
987 while (*pvp != NULL)
988 {
989 /* skip to semicolon separator */
990 while (*pvp != NULL && strcmp(*pvp, ";") != 0)
991 pvp++;
992
993 /* skip semicolon */
994 if (*pvp++ == NULL || *pvp == NULL)
995 break;
996
997 /* look for report-type */
998 if (sm_strcasecmp(*pvp++, "report-type") != 0)
999 continue;
1000
1001 /* skip equal */
1002 if (*pvp == NULL || strcmp(*pvp, "=") != 0)
1003 continue;
1004
1005 /* check value */
1006 if (*++pvp != NULL &&
1007 sm_strcasecmp(*pvp,
1008 "delivery-status") == 0)
1009 e->e_timeoutclass = TOC_DSN;
1010
1011 /* found report-type, no need to continue */
1012 break;
1013 }
1014 }
1015 }
1016
1017 /* message timeout priority */
1018 p = hvalue("priority", e->e_header);
1019 if (p != NULL)
1020 {
1021 /* (this should be in the configuration file) */
1022 if (sm_strcasecmp(p, "urgent") == 0)
1023 e->e_timeoutclass = TOC_URGENT;
1024 else if (sm_strcasecmp(p, "normal") == 0)
1025 e->e_timeoutclass = TOC_NORMAL;
1026 else if (sm_strcasecmp(p, "non-urgent") == 0)
1027 e->e_timeoutclass = TOC_NONURGENT;
1028 else if (bitset(EF_RESPONSE, e->e_flags))
1029 e->e_timeoutclass = TOC_DSN;
1030 }
1031 else if (bitset(EF_RESPONSE, e->e_flags))
1032 e->e_timeoutclass = TOC_DSN;
1033
1034 /* date message originated */
1035 p = hvalue("posted-date", e->e_header);
1036 if (p == NULL)
1037 p = hvalue("date", e->e_header);
1038 if (p != NULL)
1039 macdefine(&e->e_macro, A_PERM, 'a', p);
1040
1041 /* check to see if this is a MIME message */
1042 if ((e->e_bodytype != NULL &&
1043 sm_strcasecmp(e->e_bodytype, "8BITMIME") == 0) ||
1044 hvalue("MIME-Version", e->e_header) != NULL)
1045 {
1046 e->e_flags |= EF_IS_MIME;
1047 if (HasEightBits)
1048 e->e_bodytype = "8BITMIME";
1049 }
1050 else if ((p = hvalue("Content-Type", e->e_header)) != NULL)
1051 {
1052 /* this may be an RFC 1049 message */
1053 p = strpbrk(p, ";/");
1054 if (p == NULL || *p == ';')
1055 {
1056 /* yep, it is */
1057 e->e_flags |= EF_DONT_MIME;
1058 }
1059 }
1060
1061 /*
1062 ** From person in antiquated ARPANET mode
1063 ** required by UK Grey Book e-mail gateways (sigh)
1064 */
1065
1066 if (OpMode == MD_ARPAFTP)
1067 {
1068 register struct hdrinfo *hi;
1069
1070 for (hi = HdrInfo; hi->hi_field != NULL; hi++)
1071 {
1072 if (bitset(H_FROM, hi->hi_flags) &&
1073 (!bitset(H_RESENT, hi->hi_flags) ||
1074 bitset(EF_RESENT, e->e_flags)) &&
1075 (p = hvalue(hi->hi_field, e->e_header)) != NULL)
1076 break;
1077 }
1078 if (hi->hi_field != NULL)
1079 {
1080 if (tTd(32, 2))
1081 sm_dprintf("eatheader: setsender(*%s == %s)\n",
1082 hi->hi_field, p);
1083 setsender(p, e, NULL, '\0', true);
1084 }
1085 }
1086
1087 /*
1088 ** Log collection information.
1089 */
1090
1091 if (tTd(92, 2))
1092 sm_dprintf("eatheader: e_id=%s, EF_LOGSENDER=%d, LogLevel=%d, log=%d\n",
1093 e->e_id, bitset(EF_LOGSENDER, e->e_flags), LogLevel,
1094 log);
1095 if (log && bitset(EF_LOGSENDER, e->e_flags) && LogLevel > 4)
1096 {
1097 logsender(e, e->e_msgid);
1098 e->e_flags &= ~EF_LOGSENDER;
1099 }
1100 }
1101
1102 /*
1103 ** LOGSENDER -- log sender information
1104 **
1105 ** Parameters:
1106 ** e -- the envelope to log
1107 ** msgid -- the message id
1108 **
1109 ** Returns:
1110 ** none
1111 */
1112
1113 void
logsender(e,msgid)1114 logsender(e, msgid)
1115 register ENVELOPE *e;
1116 char *msgid;
1117 {
1118 char *name;
1119 register char *sbp;
1120 register char *p;
1121 char hbuf[MAXNAME + 1];
1122 char sbuf[MAXLINE + 1];
1123 char mbuf[MAXNAME + 1];
1124
1125 /* don't allow newlines in the message-id */
1126 /* XXX do we still need this? sm_syslog() replaces control chars */
1127 if (msgid != NULL)
1128 {
1129 size_t l;
1130
1131 l = strlen(msgid);
1132 if (l > sizeof(mbuf) - 1)
1133 l = sizeof(mbuf) - 1;
1134 memmove(mbuf, msgid, l);
1135 mbuf[l] = '\0';
1136 p = mbuf;
1137 while ((p = strchr(p, '\n')) != NULL)
1138 *p++ = ' ';
1139 }
1140
1141 if (bitset(EF_RESPONSE, e->e_flags))
1142 name = "[RESPONSE]";
1143 else if ((name = macvalue('_', e)) != NULL)
1144 /* EMPTY */
1145 ;
1146 else if (RealHostName == NULL)
1147 name = "localhost";
1148 else if (RealHostName[0] == '[')
1149 name = RealHostName;
1150 else
1151 {
1152 name = hbuf;
1153 (void) sm_snprintf(hbuf, sizeof(hbuf), "%.80s", RealHostName);
1154 if (RealHostAddr.sa.sa_family != 0)
1155 {
1156 p = &hbuf[strlen(hbuf)];
1157 (void) sm_snprintf(p, SPACELEFT(hbuf, p),
1158 " (%.100s)",
1159 anynet_ntoa(&RealHostAddr));
1160 }
1161 }
1162
1163 /* some versions of syslog only take 5 printf args */
1164 #if (SYSLOG_BUFSIZE) >= 256
1165 sbp = sbuf;
1166 (void) sm_snprintf(sbp, SPACELEFT(sbuf, sbp),
1167 "from=%.200s, size=%ld, class=%d, nrcpts=%d",
1168 e->e_from.q_paddr == NULL ? "<NONE>" : e->e_from.q_paddr,
1169 PRT_NONNEGL(e->e_msgsize), e->e_class, e->e_nrcpts);
1170 sbp += strlen(sbp);
1171 if (msgid != NULL)
1172 {
1173 (void) sm_snprintf(sbp, SPACELEFT(sbuf, sbp),
1174 ", msgid=%.100s", mbuf);
1175 sbp += strlen(sbp);
1176 }
1177 if (e->e_bodytype != NULL)
1178 {
1179 (void) sm_snprintf(sbp, SPACELEFT(sbuf, sbp),
1180 ", bodytype=%.20s", e->e_bodytype);
1181 sbp += strlen(sbp);
1182 }
1183 p = macvalue('r', e);
1184 if (p != NULL)
1185 {
1186 (void) sm_snprintf(sbp, SPACELEFT(sbuf, sbp),
1187 ", proto=%.20s", p);
1188 sbp += strlen(sbp);
1189 }
1190 p = macvalue(macid("{daemon_name}"), e);
1191 if (p != NULL)
1192 {
1193 (void) sm_snprintf(sbp, SPACELEFT(sbuf, sbp),
1194 ", daemon=%.20s", p);
1195 sbp += strlen(sbp);
1196 }
1197 sm_syslog(LOG_INFO, e->e_id, "%.850s, relay=%s", sbuf, name);
1198
1199 #else /* (SYSLOG_BUFSIZE) >= 256 */
1200
1201 sm_syslog(LOG_INFO, e->e_id,
1202 "from=%s",
1203 e->e_from.q_paddr == NULL ? "<NONE>"
1204 : shortenstring(e->e_from.q_paddr,
1205 83));
1206 sm_syslog(LOG_INFO, e->e_id,
1207 "size=%ld, class=%ld, nrcpts=%d",
1208 PRT_NONNEGL(e->e_msgsize), e->e_class, e->e_nrcpts);
1209 if (msgid != NULL)
1210 sm_syslog(LOG_INFO, e->e_id,
1211 "msgid=%s",
1212 shortenstring(mbuf, 83));
1213 sbp = sbuf;
1214 *sbp = '\0';
1215 if (e->e_bodytype != NULL)
1216 {
1217 (void) sm_snprintf(sbp, SPACELEFT(sbuf, sbp),
1218 "bodytype=%.20s, ", e->e_bodytype);
1219 sbp += strlen(sbp);
1220 }
1221 p = macvalue('r', e);
1222 if (p != NULL)
1223 {
1224 (void) sm_snprintf(sbp, SPACELEFT(sbuf, sbp),
1225 "proto=%.20s, ", p);
1226 sbp += strlen(sbp);
1227 }
1228 sm_syslog(LOG_INFO, e->e_id,
1229 "%.400srelay=%s", sbuf, name);
1230 #endif /* (SYSLOG_BUFSIZE) >= 256 */
1231 }
1232
1233 /*
1234 ** PRIENCODE -- encode external priority names into internal values.
1235 **
1236 ** Parameters:
1237 ** p -- priority in ascii.
1238 **
1239 ** Returns:
1240 ** priority as a numeric level.
1241 **
1242 ** Side Effects:
1243 ** none.
1244 */
1245
1246 static int
priencode(p)1247 priencode(p)
1248 char *p;
1249 {
1250 register int i;
1251
1252 for (i = 0; i < NumPriorities; i++)
1253 {
1254 if (sm_strcasecmp(p, Priorities[i].pri_name) == 0)
1255 return Priorities[i].pri_val;
1256 }
1257
1258 /* unknown priority */
1259 return 0;
1260 }
1261
1262 /*
1263 ** CRACKADDR -- parse an address and turn it into a macro
1264 **
1265 ** This doesn't actually parse the address -- it just extracts
1266 ** it and replaces it with "$g". The parse is totally ad hoc
1267 ** and isn't even guaranteed to leave something syntactically
1268 ** identical to what it started with. However, it does leave
1269 ** something semantically identical if possible, else at least
1270 ** syntactically correct.
1271 **
1272 ** For example, it changes "Real Name <real@example.com> (Comment)"
1273 ** to "Real Name <$g> (Comment)".
1274 **
1275 ** This algorithm has been cleaned up to handle a wider range
1276 ** of cases -- notably quoted and backslash escaped strings.
1277 ** This modification makes it substantially better at preserving
1278 ** the original syntax.
1279 **
1280 ** Parameters:
1281 ** addr -- the address to be cracked.
1282 ** e -- the current envelope.
1283 **
1284 ** Returns:
1285 ** a pointer to the new version.
1286 **
1287 ** Side Effects:
1288 ** none.
1289 **
1290 ** Warning:
1291 ** The return value is saved in local storage and should
1292 ** be copied if it is to be reused.
1293 */
1294
1295 #define SM_HAVE_ROOM ((bp < buflim) && (buflim <= bufend))
1296
1297 /*
1298 ** Append a character to bp if we have room.
1299 ** If not, punt and return $g.
1300 */
1301
1302 #define SM_APPEND_CHAR(c) \
1303 do \
1304 { \
1305 if (SM_HAVE_ROOM) \
1306 *bp++ = (c); \
1307 else \
1308 goto returng; \
1309 } while (0)
1310
1311 #if MAXNAME < 10
1312 ERROR MAXNAME must be at least 10
1313 #endif /* MAXNAME < 10 */
1314
1315 char *
crackaddr(addr,e)1316 crackaddr(addr, e)
1317 register char *addr;
1318 ENVELOPE *e;
1319 {
1320 register char *p;
1321 register char c;
1322 int cmtlev; /* comment level in input string */
1323 int realcmtlev; /* comment level in output string */
1324 int anglelev; /* angle level in input string */
1325 int copylev; /* 0 == in address, >0 copying */
1326 int bracklev; /* bracket level for IPv6 addr check */
1327 bool addangle; /* put closing angle in output */
1328 bool qmode; /* quoting in original string? */
1329 bool realqmode; /* quoting in output string? */
1330 bool putgmac = false; /* already wrote $g */
1331 bool quoteit = false; /* need to quote next character */
1332 bool gotangle = false; /* found first '<' */
1333 bool gotcolon = false; /* found a ':' */
1334 register char *bp;
1335 char *buflim;
1336 char *bufhead;
1337 char *addrhead;
1338 char *bufend;
1339 static char buf[MAXNAME + 1];
1340
1341 if (tTd(33, 1))
1342 sm_dprintf("crackaddr(%s)\n", addr);
1343
1344 buflim = bufend = &buf[sizeof(buf) - 1];
1345 bp = bufhead = buf;
1346
1347 /* skip over leading spaces but preserve them */
1348 while (*addr != '\0' && isascii(*addr) && isspace(*addr))
1349 {
1350 SM_APPEND_CHAR(*addr);
1351 addr++;
1352 }
1353 bufhead = bp;
1354
1355 /*
1356 ** Start by assuming we have no angle brackets. This will be
1357 ** adjusted later if we find them.
1358 */
1359
1360 p = addrhead = addr;
1361 copylev = anglelev = cmtlev = realcmtlev = 0;
1362 bracklev = 0;
1363 qmode = realqmode = addangle = false;
1364
1365 while ((c = *p++) != '\0')
1366 {
1367 /*
1368 ** Try to keep legal syntax using spare buffer space
1369 ** (maintained by buflim).
1370 */
1371
1372 if (copylev > 0)
1373 SM_APPEND_CHAR(c);
1374
1375 /* check for backslash escapes */
1376 if (c == '\\')
1377 {
1378 /* arrange to quote the address */
1379 if (cmtlev <= 0 && !qmode)
1380 quoteit = true;
1381
1382 if ((c = *p++) == '\0')
1383 {
1384 /* too far */
1385 p--;
1386 goto putg;
1387 }
1388 if (copylev > 0)
1389 SM_APPEND_CHAR(c);
1390 goto putg;
1391 }
1392
1393 /* check for quoted strings */
1394 if (c == '"' && cmtlev <= 0)
1395 {
1396 qmode = !qmode;
1397 if (copylev > 0 && SM_HAVE_ROOM)
1398 {
1399 if (realqmode)
1400 buflim--;
1401 else
1402 buflim++;
1403 realqmode = !realqmode;
1404 }
1405 continue;
1406 }
1407 if (qmode)
1408 goto putg;
1409
1410 /* check for comments */
1411 if (c == '(')
1412 {
1413 cmtlev++;
1414
1415 /* allow space for closing paren */
1416 if (SM_HAVE_ROOM)
1417 {
1418 buflim--;
1419 realcmtlev++;
1420 if (copylev++ <= 0)
1421 {
1422 if (bp != bufhead)
1423 SM_APPEND_CHAR(' ');
1424 SM_APPEND_CHAR(c);
1425 }
1426 }
1427 }
1428 if (cmtlev > 0)
1429 {
1430 if (c == ')')
1431 {
1432 cmtlev--;
1433 copylev--;
1434 if (SM_HAVE_ROOM)
1435 {
1436 realcmtlev--;
1437 buflim++;
1438 }
1439 }
1440 continue;
1441 }
1442 else if (c == ')')
1443 {
1444 /* syntax error: unmatched ) */
1445 if (copylev > 0 && SM_HAVE_ROOM && bp > bufhead)
1446 bp--;
1447 }
1448
1449 /* count nesting on [ ... ] (for IPv6 domain literals) */
1450 if (c == '[')
1451 bracklev++;
1452 else if (c == ']')
1453 bracklev--;
1454
1455 /* check for group: list; syntax */
1456 if (c == ':' && anglelev <= 0 && bracklev <= 0 &&
1457 !gotcolon && !ColonOkInAddr)
1458 {
1459 register char *q;
1460
1461 /*
1462 ** Check for DECnet phase IV ``::'' (host::user)
1463 ** or DECnet phase V ``:.'' syntaxes. The latter
1464 ** covers ``user@DEC:.tay.myhost'' and
1465 ** ``DEC:.tay.myhost::user'' syntaxes (bletch).
1466 */
1467
1468 if (*p == ':' || *p == '.')
1469 {
1470 if (cmtlev <= 0 && !qmode)
1471 quoteit = true;
1472 if (copylev > 0)
1473 {
1474 SM_APPEND_CHAR(c);
1475 SM_APPEND_CHAR(*p);
1476 }
1477 p++;
1478 goto putg;
1479 }
1480
1481 gotcolon = true;
1482
1483 bp = bufhead;
1484 if (quoteit)
1485 {
1486 SM_APPEND_CHAR('"');
1487
1488 /* back up over the ':' and any spaces */
1489 --p;
1490 while (p > addr &&
1491 isascii(*--p) && isspace(*p))
1492 continue;
1493 p++;
1494 }
1495 for (q = addrhead; q < p; )
1496 {
1497 c = *q++;
1498 if (quoteit && c == '"')
1499 SM_APPEND_CHAR('\\');
1500 SM_APPEND_CHAR(c);
1501 }
1502 if (quoteit)
1503 {
1504 if (bp == &bufhead[1])
1505 bp--;
1506 else
1507 SM_APPEND_CHAR('"');
1508 while ((c = *p++) != ':')
1509 SM_APPEND_CHAR(c);
1510 SM_APPEND_CHAR(c);
1511 }
1512
1513 /* any trailing white space is part of group: */
1514 while (isascii(*p) && isspace(*p))
1515 {
1516 SM_APPEND_CHAR(*p);
1517 p++;
1518 }
1519 copylev = 0;
1520 putgmac = quoteit = false;
1521 bufhead = bp;
1522 addrhead = p;
1523 continue;
1524 }
1525
1526 if (c == ';' && copylev <= 0 && !ColonOkInAddr)
1527 SM_APPEND_CHAR(c);
1528
1529 /* check for characters that may have to be quoted */
1530 if (strchr(MustQuoteChars, c) != NULL)
1531 {
1532 /*
1533 ** If these occur as the phrase part of a <>
1534 ** construct, but are not inside of () or already
1535 ** quoted, they will have to be quoted. Note that
1536 ** now (but don't actually do the quoting).
1537 */
1538
1539 if (cmtlev <= 0 && !qmode)
1540 quoteit = true;
1541 }
1542
1543 /* check for angle brackets */
1544 if (c == '<')
1545 {
1546 register char *q;
1547
1548 /* assume first of two angles is bogus */
1549 if (gotangle)
1550 quoteit = true;
1551 gotangle = true;
1552
1553 /* oops -- have to change our mind */
1554 anglelev = 1;
1555 if (SM_HAVE_ROOM)
1556 {
1557 if (!addangle)
1558 buflim--;
1559 addangle = true;
1560 }
1561
1562 bp = bufhead;
1563 if (quoteit)
1564 {
1565 SM_APPEND_CHAR('"');
1566
1567 /* back up over the '<' and any spaces */
1568 --p;
1569 while (p > addr &&
1570 isascii(*--p) && isspace(*p))
1571 continue;
1572 p++;
1573 }
1574 for (q = addrhead; q < p; )
1575 {
1576 c = *q++;
1577 if (quoteit && c == '"')
1578 {
1579 SM_APPEND_CHAR('\\');
1580 SM_APPEND_CHAR(c);
1581 }
1582 else
1583 SM_APPEND_CHAR(c);
1584 }
1585 if (quoteit)
1586 {
1587 if (bp == &buf[1])
1588 bp--;
1589 else
1590 SM_APPEND_CHAR('"');
1591 while ((c = *p++) != '<')
1592 SM_APPEND_CHAR(c);
1593 SM_APPEND_CHAR(c);
1594 }
1595 copylev = 0;
1596 putgmac = quoteit = false;
1597 continue;
1598 }
1599
1600 if (c == '>')
1601 {
1602 if (anglelev > 0)
1603 {
1604 anglelev--;
1605 if (SM_HAVE_ROOM)
1606 {
1607 if (addangle)
1608 buflim++;
1609 addangle = false;
1610 }
1611 }
1612 else if (SM_HAVE_ROOM)
1613 {
1614 /* syntax error: unmatched > */
1615 if (copylev > 0 && bp > bufhead)
1616 bp--;
1617 quoteit = true;
1618 continue;
1619 }
1620 if (copylev++ <= 0)
1621 SM_APPEND_CHAR(c);
1622 continue;
1623 }
1624
1625 /* must be a real address character */
1626 putg:
1627 if (copylev <= 0 && !putgmac)
1628 {
1629 if (bp > buf && bp[-1] == ')')
1630 SM_APPEND_CHAR(' ');
1631 SM_APPEND_CHAR(MACROEXPAND);
1632 SM_APPEND_CHAR('g');
1633 putgmac = true;
1634 }
1635 }
1636
1637 /* repair any syntactic damage */
1638 if (realqmode && bp < bufend)
1639 *bp++ = '"';
1640 while (realcmtlev-- > 0 && bp < bufend)
1641 *bp++ = ')';
1642 if (addangle && bp < bufend)
1643 *bp++ = '>';
1644 *bp = '\0';
1645 if (bp < bufend)
1646 goto success;
1647
1648 returng:
1649 /* String too long, punt */
1650 buf[0] = '<';
1651 buf[1] = MACROEXPAND;
1652 buf[2]= 'g';
1653 buf[3] = '>';
1654 buf[4]= '\0';
1655 sm_syslog(LOG_ALERT, e->e_id,
1656 "Dropped invalid comments from header address");
1657
1658 success:
1659 if (tTd(33, 1))
1660 {
1661 sm_dprintf("crackaddr=>`");
1662 xputs(sm_debug_file(), buf);
1663 sm_dprintf("'\n");
1664 }
1665 return buf;
1666 }
1667
1668 /*
1669 ** PUTHEADER -- put the header part of a message from the in-core copy
1670 **
1671 ** Parameters:
1672 ** mci -- the connection information.
1673 ** hdr -- the header to put.
1674 ** e -- envelope to use.
1675 ** flags -- MIME conversion flags.
1676 **
1677 ** Returns:
1678 ** true iff header part was written successfully
1679 **
1680 ** Side Effects:
1681 ** none.
1682 */
1683
1684 bool
putheader(mci,hdr,e,flags)1685 putheader(mci, hdr, e, flags)
1686 register MCI *mci;
1687 HDR *hdr;
1688 register ENVELOPE *e;
1689 int flags;
1690 {
1691 register HDR *h;
1692 char buf[SM_MAX(MAXLINE,BUFSIZ)];
1693 char obuf[MAXLINE];
1694
1695 if (tTd(34, 1))
1696 sm_dprintf("--- putheader, mailer = %s ---\n",
1697 mci->mci_mailer->m_name);
1698
1699 /*
1700 ** If we're in MIME mode, we're not really in the header of the
1701 ** message, just the header of one of the parts of the body of
1702 ** the message. Therefore MCIF_INHEADER should not be turned on.
1703 */
1704
1705 if (!bitset(MCIF_INMIME, mci->mci_flags))
1706 mci->mci_flags |= MCIF_INHEADER;
1707
1708 for (h = hdr; h != NULL; h = h->h_link)
1709 {
1710 register char *p = h->h_value;
1711 char *q;
1712
1713 if (tTd(34, 11))
1714 {
1715 sm_dprintf(" %s:", h->h_field);
1716 xputs(sm_debug_file(), p);
1717 }
1718
1719 /* Skip empty headers */
1720 if (h->h_value == NULL)
1721 continue;
1722
1723 /* heuristic shortening of MIME fields to avoid MUA overflows */
1724 if (MaxMimeFieldLength > 0 &&
1725 wordinclass(h->h_field,
1726 macid("{checkMIMEFieldHeaders}")))
1727 {
1728 size_t len;
1729
1730 len = fix_mime_header(h, e);
1731 if (len > 0)
1732 {
1733 sm_syslog(LOG_ALERT, e->e_id,
1734 "Truncated MIME %s header due to field size (length = %ld) (possible attack)",
1735 h->h_field, (unsigned long) len);
1736 if (tTd(34, 11))
1737 sm_dprintf(" truncated MIME %s header due to field size (length = %ld) (possible attack)\n",
1738 h->h_field,
1739 (unsigned long) len);
1740 }
1741 }
1742
1743 if (MaxMimeHeaderLength > 0 &&
1744 wordinclass(h->h_field,
1745 macid("{checkMIMETextHeaders}")))
1746 {
1747 size_t len;
1748
1749 len = strlen(h->h_value);
1750 if (len > (size_t) MaxMimeHeaderLength)
1751 {
1752 h->h_value[MaxMimeHeaderLength - 1] = '\0';
1753 sm_syslog(LOG_ALERT, e->e_id,
1754 "Truncated long MIME %s header (length = %ld) (possible attack)",
1755 h->h_field, (unsigned long) len);
1756 if (tTd(34, 11))
1757 sm_dprintf(" truncated long MIME %s header (length = %ld) (possible attack)\n",
1758 h->h_field,
1759 (unsigned long) len);
1760 }
1761 }
1762
1763 if (MaxMimeHeaderLength > 0 &&
1764 wordinclass(h->h_field,
1765 macid("{checkMIMEHeaders}")))
1766 {
1767 size_t len;
1768
1769 len = strlen(h->h_value);
1770 if (shorten_rfc822_string(h->h_value,
1771 MaxMimeHeaderLength))
1772 {
1773 if (len < MaxMimeHeaderLength)
1774 {
1775 /* we only rebalanced a bogus header */
1776 sm_syslog(LOG_ALERT, e->e_id,
1777 "Fixed MIME %s header (possible attack)",
1778 h->h_field);
1779 if (tTd(34, 11))
1780 sm_dprintf(" fixed MIME %s header (possible attack)\n",
1781 h->h_field);
1782 }
1783 else
1784 {
1785 /* we actually shortened header */
1786 sm_syslog(LOG_ALERT, e->e_id,
1787 "Truncated long MIME %s header (length = %ld) (possible attack)",
1788 h->h_field,
1789 (unsigned long) len);
1790 if (tTd(34, 11))
1791 sm_dprintf(" truncated long MIME %s header (length = %ld) (possible attack)\n",
1792 h->h_field,
1793 (unsigned long) len);
1794 }
1795 }
1796 }
1797
1798 /*
1799 ** Suppress Content-Transfer-Encoding: if we are MIMEing
1800 ** and we are potentially converting from 8 bit to 7 bit
1801 ** MIME. If converting, add a new CTE header in
1802 ** mime8to7().
1803 */
1804
1805 if (bitset(H_CTE, h->h_flags) &&
1806 bitset(MCIF_CVT8TO7|MCIF_CVT7TO8|MCIF_INMIME,
1807 mci->mci_flags) &&
1808 !bitset(M87F_NO8TO7, flags))
1809 {
1810 if (tTd(34, 11))
1811 sm_dprintf(" (skipped (content-transfer-encoding))\n");
1812 continue;
1813 }
1814
1815 if (bitset(MCIF_INMIME, mci->mci_flags))
1816 {
1817 if (tTd(34, 11))
1818 sm_dprintf("\n");
1819 if (!put_vanilla_header(h, p, mci))
1820 goto writeerr;
1821 continue;
1822 }
1823
1824 if (bitset(H_CHECK|H_ACHECK, h->h_flags) &&
1825 !bitintersect(h->h_mflags, mci->mci_mailer->m_flags) &&
1826 (h->h_macro == '\0' ||
1827 (q = macvalue(bitidx(h->h_macro), e)) == NULL ||
1828 *q == '\0'))
1829 {
1830 if (tTd(34, 11))
1831 sm_dprintf(" (skipped)\n");
1832 continue;
1833 }
1834
1835 /* handle Resent-... headers specially */
1836 if (bitset(H_RESENT, h->h_flags) && !bitset(EF_RESENT, e->e_flags))
1837 {
1838 if (tTd(34, 11))
1839 sm_dprintf(" (skipped (resent))\n");
1840 continue;
1841 }
1842
1843 /* suppress return receipts if requested */
1844 if (bitset(H_RECEIPTTO, h->h_flags) &&
1845 (RrtImpliesDsn || bitset(EF_NORECEIPT, e->e_flags)))
1846 {
1847 if (tTd(34, 11))
1848 sm_dprintf(" (skipped (receipt))\n");
1849 continue;
1850 }
1851
1852 /* macro expand value if generated internally */
1853 if (bitset(H_DEFAULT, h->h_flags) ||
1854 bitset(H_BINDLATE, h->h_flags))
1855 {
1856 expand(p, buf, sizeof(buf), e);
1857 p = buf;
1858 if (*p == '\0')
1859 {
1860 if (tTd(34, 11))
1861 sm_dprintf(" (skipped -- null value)\n");
1862 continue;
1863 }
1864 }
1865
1866 if (bitset(H_BCC, h->h_flags))
1867 {
1868 /* Bcc: field -- either truncate or delete */
1869 if (bitset(EF_DELETE_BCC, e->e_flags))
1870 {
1871 if (tTd(34, 11))
1872 sm_dprintf(" (skipped -- bcc)\n");
1873 }
1874 else
1875 {
1876 /* no other recipient headers: truncate value */
1877 (void) sm_strlcpyn(obuf, sizeof(obuf), 2,
1878 h->h_field, ":");
1879 if (!putline(obuf, mci))
1880 goto writeerr;
1881 }
1882 continue;
1883 }
1884
1885 if (tTd(34, 11))
1886 sm_dprintf("\n");
1887
1888 if (bitset(H_FROM|H_RCPT, h->h_flags))
1889 {
1890 /* address field */
1891 bool oldstyle = bitset(EF_OLDSTYLE, e->e_flags);
1892
1893 if (bitset(H_FROM, h->h_flags))
1894 oldstyle = false;
1895 commaize(h, p, oldstyle, mci, e,
1896 PXLF_HEADER | PXLF_STRIPMQUOTE);
1897 }
1898 else
1899 {
1900 if (!put_vanilla_header(h, p, mci))
1901 goto writeerr;
1902 }
1903 }
1904
1905 /*
1906 ** If we are converting this to a MIME message, add the
1907 ** MIME headers (but not in MIME mode!).
1908 */
1909
1910 #if MIME8TO7
1911 if (bitset(MM_MIME8BIT, MimeMode) &&
1912 bitset(EF_HAS8BIT, e->e_flags) &&
1913 !bitset(EF_DONT_MIME, e->e_flags) &&
1914 !bitnset(M_8BITS, mci->mci_mailer->m_flags) &&
1915 !bitset(MCIF_CVT8TO7|MCIF_CVT7TO8|MCIF_INMIME, mci->mci_flags) &&
1916 hvalue("MIME-Version", e->e_header) == NULL)
1917 {
1918 if (!putline("MIME-Version: 1.0", mci))
1919 goto writeerr;
1920 if (hvalue("Content-Type", e->e_header) == NULL)
1921 {
1922 (void) sm_snprintf(obuf, sizeof(obuf),
1923 "Content-Type: text/plain; charset=%s",
1924 defcharset(e));
1925 if (!putline(obuf, mci))
1926 goto writeerr;
1927 }
1928 if (hvalue("Content-Transfer-Encoding", e->e_header) == NULL
1929 && !putline("Content-Transfer-Encoding: 8bit", mci))
1930 goto writeerr;
1931 }
1932 #endif /* MIME8TO7 */
1933 return true;
1934
1935 writeerr:
1936 return false;
1937 }
1938
1939 /*
1940 ** PUT_VANILLA_HEADER -- output a fairly ordinary header
1941 **
1942 ** Parameters:
1943 ** h -- the structure describing this header
1944 ** v -- the value of this header
1945 ** mci -- the connection info for output
1946 **
1947 ** Returns:
1948 ** true iff header was written successfully
1949 */
1950
1951 static bool
put_vanilla_header(h,v,mci)1952 put_vanilla_header(h, v, mci)
1953 HDR *h;
1954 char *v;
1955 MCI *mci;
1956 {
1957 register char *nlp;
1958 register char *obp;
1959 int putflags;
1960 char obuf[MAXLINE + 256]; /* additional length for h_field */
1961
1962 putflags = PXLF_HEADER | PXLF_STRIPMQUOTE;
1963 if (bitnset(M_7BITHDRS, mci->mci_mailer->m_flags))
1964 putflags |= PXLF_STRIP8BIT;
1965 (void) sm_snprintf(obuf, sizeof(obuf), "%.200s:", h->h_field);
1966 obp = obuf + strlen(obuf);
1967 while ((nlp = strchr(v, '\n')) != NULL)
1968 {
1969 int l;
1970
1971 l = nlp - v;
1972
1973 /*
1974 ** XXX This is broken for SPACELEFT()==0
1975 ** However, SPACELEFT() is always > 0 unless MAXLINE==1.
1976 */
1977
1978 if (SPACELEFT(obuf, obp) - 1 < (size_t) l)
1979 l = SPACELEFT(obuf, obp) - 1;
1980
1981 (void) sm_snprintf(obp, SPACELEFT(obuf, obp), "%.*s", l, v);
1982 if (!putxline(obuf, strlen(obuf), mci, putflags))
1983 goto writeerr;
1984 v += l + 1;
1985 obp = obuf;
1986 if (*v != ' ' && *v != '\t')
1987 *obp++ = ' ';
1988 }
1989
1990 /* XXX This is broken for SPACELEFT()==0 */
1991 (void) sm_snprintf(obp, SPACELEFT(obuf, obp), "%.*s",
1992 (int) (SPACELEFT(obuf, obp) - 1), v);
1993 return putxline(obuf, strlen(obuf), mci, putflags);
1994
1995 writeerr:
1996 return false;
1997 }
1998
1999 /*
2000 ** COMMAIZE -- output a header field, making a comma-translated list.
2001 **
2002 ** Parameters:
2003 ** h -- the header field to output.
2004 ** p -- the value to put in it.
2005 ** oldstyle -- true if this is an old style header.
2006 ** mci -- the connection information.
2007 ** e -- the envelope containing the message.
2008 ** putflags -- flags for putxline()
2009 **
2010 ** Returns:
2011 ** true iff header field was written successfully
2012 **
2013 ** Side Effects:
2014 ** outputs "p" to "mci".
2015 */
2016
2017 bool
commaize(h,p,oldstyle,mci,e,putflags)2018 commaize(h, p, oldstyle, mci, e, putflags)
2019 register HDR *h;
2020 register char *p;
2021 bool oldstyle;
2022 register MCI *mci;
2023 register ENVELOPE *e;
2024 int putflags;
2025 {
2026 register char *obp;
2027 int opos, omax, spaces;
2028 bool firstone = true;
2029 char **res;
2030 char obuf[MAXLINE + 3];
2031
2032 /*
2033 ** Output the address list translated by the
2034 ** mailer and with commas.
2035 */
2036
2037 if (tTd(14, 2))
2038 sm_dprintf("commaize(%s:%s)\n", h->h_field, p);
2039
2040 if (bitnset(M_7BITHDRS, mci->mci_mailer->m_flags))
2041 putflags |= PXLF_STRIP8BIT;
2042
2043 obp = obuf;
2044 (void) sm_snprintf(obp, SPACELEFT(obuf, obp), "%.200s:", h->h_field);
2045 /* opos = strlen(obp); instead of the next 3 lines? */
2046 opos = strlen(h->h_field) + 1;
2047 if (opos > 201)
2048 opos = 201;
2049 obp += opos;
2050
2051 spaces = 0;
2052 while (*p != '\0' && isascii(*p) && isspace(*p))
2053 {
2054 ++spaces;
2055 ++p;
2056 }
2057 if (spaces > 0)
2058 {
2059 SM_ASSERT(sizeof(obuf) > opos * 2);
2060
2061 /*
2062 ** Restrict number of spaces to half the length of buffer
2063 ** so the header field body can be put in here too.
2064 ** Note: this is a hack...
2065 */
2066
2067 if (spaces > sizeof(obuf) / 2)
2068 spaces = sizeof(obuf) / 2;
2069 (void) sm_snprintf(obp, SPACELEFT(obuf, obp), "%*s", spaces,
2070 "");
2071 opos += spaces;
2072 obp += spaces;
2073 SM_ASSERT(obp < &obuf[MAXLINE]);
2074 }
2075
2076 omax = mci->mci_mailer->m_linelimit - 2;
2077 if (omax < 0 || omax > 78)
2078 omax = 78;
2079
2080 /*
2081 ** Run through the list of values.
2082 */
2083
2084 while (*p != '\0')
2085 {
2086 register char *name;
2087 register int c;
2088 char savechar;
2089 int flags;
2090 auto int status;
2091
2092 /*
2093 ** Find the end of the name. New style names
2094 ** end with a comma, old style names end with
2095 ** a space character. However, spaces do not
2096 ** necessarily delimit an old-style name -- at
2097 ** signs mean keep going.
2098 */
2099
2100 /* find end of name */
2101 while ((isascii(*p) && isspace(*p)) || *p == ',')
2102 p++;
2103 name = p;
2104 res = NULL;
2105 for (;;)
2106 {
2107 auto char *oldp;
2108 char pvpbuf[PSBUFSIZE];
2109
2110 res = prescan(p, oldstyle ? ' ' : ',', pvpbuf,
2111 sizeof(pvpbuf), &oldp, ExtTokenTab, false);
2112 p = oldp;
2113 #if _FFR_IGNORE_BOGUS_ADDR
2114 /* ignore addresses that can't be parsed */
2115 if (res == NULL)
2116 {
2117 name = p;
2118 continue;
2119 }
2120 #endif /* _FFR_IGNORE_BOGUS_ADDR */
2121
2122 /* look to see if we have an at sign */
2123 while (*p != '\0' && isascii(*p) && isspace(*p))
2124 p++;
2125
2126 if (*p != '@')
2127 {
2128 p = oldp;
2129 break;
2130 }
2131 ++p;
2132 while (*p != '\0' && isascii(*p) && isspace(*p))
2133 p++;
2134 }
2135 /* at the end of one complete name */
2136
2137 /* strip off trailing white space */
2138 while (p >= name &&
2139 ((isascii(*p) && isspace(*p)) || *p == ',' || *p == '\0'))
2140 p--;
2141 if (++p == name)
2142 continue;
2143
2144 /*
2145 ** if prescan() failed go a bit backwards; this is a hack,
2146 ** there should be some better error recovery.
2147 */
2148
2149 if (res == NULL && p > name &&
2150 !((isascii(*p) && isspace(*p)) || *p == ',' || *p == '\0'))
2151 --p;
2152 savechar = *p;
2153 *p = '\0';
2154
2155 /* translate the name to be relative */
2156 flags = RF_HEADERADDR|RF_ADDDOMAIN;
2157 if (bitset(H_FROM, h->h_flags))
2158 flags |= RF_SENDERADDR;
2159 #if USERDB
2160 else if (e->e_from.q_mailer != NULL &&
2161 bitnset(M_UDBRECIPIENT, e->e_from.q_mailer->m_flags))
2162 {
2163 char *q;
2164
2165 q = udbsender(name, e->e_rpool);
2166 if (q != NULL)
2167 name = q;
2168 }
2169 #endif /* USERDB */
2170 status = EX_OK;
2171 name = remotename(name, mci->mci_mailer, flags, &status, e);
2172 if (*name == '\0')
2173 {
2174 *p = savechar;
2175 continue;
2176 }
2177 name = denlstring(name, false, true);
2178
2179 /* output the name with nice formatting */
2180 opos += strlen(name);
2181 if (!firstone)
2182 opos += 2;
2183 if (opos > omax && !firstone)
2184 {
2185 (void) sm_strlcpy(obp, ",\n", SPACELEFT(obuf, obp));
2186 if (!putxline(obuf, strlen(obuf), mci, putflags))
2187 goto writeerr;
2188 obp = obuf;
2189 (void) sm_strlcpy(obp, " ", sizeof(obuf));
2190 opos = strlen(obp);
2191 obp += opos;
2192 opos += strlen(name);
2193 }
2194 else if (!firstone)
2195 {
2196 (void) sm_strlcpy(obp, ", ", SPACELEFT(obuf, obp));
2197 obp += 2;
2198 }
2199
2200 while ((c = *name++) != '\0' && obp < &obuf[MAXLINE])
2201 *obp++ = c;
2202 firstone = false;
2203 *p = savechar;
2204 }
2205 if (obp < &obuf[sizeof(obuf)])
2206 *obp = '\0';
2207 else
2208 obuf[sizeof(obuf) - 1] = '\0';
2209 return putxline(obuf, strlen(obuf), mci, putflags);
2210
2211 writeerr:
2212 return false;
2213 }
2214
2215 /*
2216 ** COPYHEADER -- copy header list
2217 **
2218 ** This routine is the equivalent of newstr for header lists
2219 **
2220 ** Parameters:
2221 ** header -- list of header structures to copy.
2222 ** rpool -- resource pool, or NULL
2223 **
2224 ** Returns:
2225 ** a copy of 'header'.
2226 **
2227 ** Side Effects:
2228 ** none.
2229 */
2230
2231 HDR *
copyheader(header,rpool)2232 copyheader(header, rpool)
2233 register HDR *header;
2234 SM_RPOOL_T *rpool;
2235 {
2236 register HDR *newhdr;
2237 HDR *ret;
2238 register HDR **tail = &ret;
2239
2240 while (header != NULL)
2241 {
2242 newhdr = (HDR *) sm_rpool_malloc_x(rpool, sizeof(*newhdr));
2243 STRUCTCOPY(*header, *newhdr);
2244 *tail = newhdr;
2245 tail = &newhdr->h_link;
2246 header = header->h_link;
2247 }
2248 *tail = NULL;
2249
2250 return ret;
2251 }
2252
2253 /*
2254 ** FIX_MIME_HEADER -- possibly truncate/rebalance parameters in a MIME header
2255 **
2256 ** Run through all of the parameters of a MIME header and
2257 ** possibly truncate and rebalance the parameter according
2258 ** to MaxMimeFieldLength.
2259 **
2260 ** Parameters:
2261 ** h -- the header to truncate/rebalance
2262 ** e -- the current envelope
2263 **
2264 ** Returns:
2265 ** length of last offending field, 0 if all ok.
2266 **
2267 ** Side Effects:
2268 ** string modified in place
2269 */
2270
2271 static size_t
fix_mime_header(h,e)2272 fix_mime_header(h, e)
2273 HDR *h;
2274 ENVELOPE *e;
2275 {
2276 char *begin = h->h_value;
2277 char *end;
2278 size_t len = 0;
2279 size_t retlen = 0;
2280
2281 if (begin == NULL || *begin == '\0')
2282 return 0;
2283
2284 /* Split on each ';' */
2285 /* find_character() never returns NULL */
2286 while ((end = find_character(begin, ';')) != NULL)
2287 {
2288 char save = *end;
2289 char *bp;
2290
2291 *end = '\0';
2292
2293 len = strlen(begin);
2294
2295 /* Shorten individual parameter */
2296 if (shorten_rfc822_string(begin, MaxMimeFieldLength))
2297 {
2298 if (len < MaxMimeFieldLength)
2299 {
2300 /* we only rebalanced a bogus field */
2301 sm_syslog(LOG_ALERT, e->e_id,
2302 "Fixed MIME %s header field (possible attack)",
2303 h->h_field);
2304 if (tTd(34, 11))
2305 sm_dprintf(" fixed MIME %s header field (possible attack)\n",
2306 h->h_field);
2307 }
2308 else
2309 {
2310 /* we actually shortened the header */
2311 retlen = len;
2312 }
2313 }
2314
2315 /* Collapse the possibly shortened string with rest */
2316 bp = begin + strlen(begin);
2317 if (bp != end)
2318 {
2319 char *ep = end;
2320
2321 *end = save;
2322 end = bp;
2323
2324 /* copy character by character due to overlap */
2325 while (*ep != '\0')
2326 *bp++ = *ep++;
2327 *bp = '\0';
2328 }
2329 else
2330 *end = save;
2331 if (*end == '\0')
2332 break;
2333
2334 /* Move past ';' */
2335 begin = end + 1;
2336 }
2337 return retlen;
2338 }
2339