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[citadel] / citadel / msgbase.c
1 // Implements the message store.
2 //
3 // Copyright (c) 1987-2021 by the citadel.org team
4 //
5 // This program is open source software; you can redistribute it and/or modify
6 // it under the terms of the GNU General Public License version 3.
7 //
8 // This program is distributed in the hope that it will be useful,
9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11 // GNU General Public License for more details.
12
13
14 #include <stdlib.h>
15 #include <unistd.h>
16 #include <stdio.h>
17 #include <regex.h>
18 #include <sys/stat.h>
19 #include <libcitadel.h>
20 #include "ctdl_module.h"
21 #include "citserver.h"
22 #include "control.h"
23 #include "config.h"
24 #include "clientsocket.h"
25 #include "genstamp.h"
26 #include "room_ops.h"
27 #include "user_ops.h"
28 #include "internet_addressing.h"
29 #include "euidindex.h"
30 #include "msgbase.h"
31 #include "journaling.h"
32
33 struct addresses_to_be_filed *atbf = NULL;
34
35 // These are the four-character field headers we use when outputting
36 // messages in Citadel format (as opposed to RFC822 format).
37 char *msgkeys[] = {
38         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 
39         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 
40         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 
41         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 
42         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 
43         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 
44         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 
45         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 
46         NULL, 
47         "from", // A -> eAuthor
48         NULL,   // B -> eBig_message
49         NULL,   // C (formerly used as eRemoteRoom)
50         NULL,   // D (formerly used as eDestination)
51         "exti", // E -> eXclusivID
52         "rfca", // F -> erFc822Addr
53         NULL,   // G
54         "hnod", // H (formerly used as eHumanNode)
55         "msgn", // I -> emessageId
56         "jrnl", // J -> eJournal
57         "rep2", // K -> eReplyTo
58         "list", // L -> eListID
59         "text", // M -> eMesageText
60         NULL,   // N (formerly used as eNodename)
61         "room", // O -> eOriginalRoom
62         "path", // P -> eMessagePath
63         NULL,   // Q
64         "rcpt", // R -> eRecipient
65         NULL,   // S (formerly used as eSpecialField)
66         "time", // T -> eTimestamp
67         "subj", // U -> eMsgSubject
68         "nvto", // V -> eenVelopeTo
69         "wefw", // W -> eWeferences
70         NULL,   // X
71         "cccc", // Y -> eCarbonCopY
72         NULL    // Z
73 };
74
75
76 HashList *msgKeyLookup = NULL;
77
78 int GetFieldFromMnemonic(eMsgField *f, const char* c) {
79         void *v = NULL;
80         if (GetHash(msgKeyLookup, c, 4, &v)) {
81                 *f = (eMsgField) v;
82                 return 1;
83         }
84         return 0;
85 }
86
87 void FillMsgKeyLookupTable(void) {
88         long i;
89
90         msgKeyLookup = NewHash (1, FourHash);
91
92         for (i=0; i < 91; i++) {
93                 if (msgkeys[i] != NULL) {
94                         Put(msgKeyLookup, msgkeys[i], 4, (void*)i, reference_free_handler);
95                 }
96         }
97 }
98
99
100 eMsgField FieldOrder[]  = {
101 /* Important fields */
102         emessageId   ,
103         eMessagePath ,
104         eTimestamp   ,
105         eAuthor      ,
106         erFc822Addr  ,
107         eOriginalRoom,
108         eRecipient   ,
109 /* Semi-important fields */
110         eBig_message ,
111         eExclusiveID ,
112         eWeferences  ,
113         eJournal     ,
114 /* G is not used yet */
115         eReplyTo     ,
116         eListID      ,
117 /* Q is not used yet */
118         eenVelopeTo  ,
119 /* X is not used yet */
120 /* Z is not used yet */
121         eCarbonCopY  ,
122         eMsgSubject  ,
123 /* internal only */
124         eErrorMsg    ,
125         eSuppressIdx ,
126         eExtnotify   ,
127 /* Message text (MUST be last) */
128         eMesageText 
129 /* Not saved to disk: 
130         eVltMsgNum
131 */
132 };
133
134 static const long NDiskFields = sizeof(FieldOrder) / sizeof(eMsgField);
135
136
137 int CM_IsEmpty(struct CtdlMessage *Msg, eMsgField which) {
138         return !((Msg->cm_fields[which] != NULL) && (Msg->cm_fields[which][0] != '\0'));
139 }
140
141
142 void CM_SetField(struct CtdlMessage *Msg, eMsgField which, const char *buf, long length) {
143         if (Msg->cm_fields[which] != NULL) {
144                 free (Msg->cm_fields[which]);
145         }
146         if (length < 0) {                       // You can set the length to -1 to have CM_SetField measure it for you
147                 length = strlen(buf);
148         }
149         Msg->cm_fields[which] = malloc(length + 1);
150         memcpy(Msg->cm_fields[which], buf, length);
151         Msg->cm_fields[which][length] = '\0';
152         Msg->cm_lengths[which] = length;
153 }
154
155
156 void CM_SetFieldLONG(struct CtdlMessage *Msg, eMsgField which, long lvalue) {
157         char buf[128];
158         long len;
159         len = snprintf(buf, sizeof(buf), "%ld", lvalue);
160         CM_SetField(Msg, which, buf, len);
161 }
162
163
164 void CM_CutFieldAt(struct CtdlMessage *Msg, eMsgField WhichToCut, long maxlen) {
165         if (Msg->cm_fields[WhichToCut] == NULL)
166                 return;
167
168         if (Msg->cm_lengths[WhichToCut] > maxlen)
169         {
170                 Msg->cm_fields[WhichToCut][maxlen] = '\0';
171                 Msg->cm_lengths[WhichToCut] = maxlen;
172         }
173 }
174
175
176 void CM_FlushField(struct CtdlMessage *Msg, eMsgField which) {
177         if (Msg->cm_fields[which] != NULL)
178                 free (Msg->cm_fields[which]);
179         Msg->cm_fields[which] = NULL;
180         Msg->cm_lengths[which] = 0;
181 }
182
183
184 void CM_Flush(struct CtdlMessage *Msg) {
185         int i;
186
187         if (CM_IsValidMsg(Msg) == 0) {
188                 return;
189         }
190
191         for (i = 0; i < 256; ++i) {
192                 CM_FlushField(Msg, i);
193         }
194 }
195
196
197 void CM_CopyField(struct CtdlMessage *Msg, eMsgField WhichToPutTo, eMsgField WhichtToCopy) {
198         long len;
199         if (Msg->cm_fields[WhichToPutTo] != NULL) {
200                 free (Msg->cm_fields[WhichToPutTo]);
201         }
202
203         if (Msg->cm_fields[WhichtToCopy] != NULL) {
204                 len = Msg->cm_lengths[WhichtToCopy];
205                 Msg->cm_fields[WhichToPutTo] = malloc(len + 1);
206                 memcpy(Msg->cm_fields[WhichToPutTo], Msg->cm_fields[WhichtToCopy], len);
207                 Msg->cm_fields[WhichToPutTo][len] = '\0';
208                 Msg->cm_lengths[WhichToPutTo] = len;
209         }
210         else {
211                 Msg->cm_fields[WhichToPutTo] = NULL;
212                 Msg->cm_lengths[WhichToPutTo] = 0;
213         }
214 }
215
216
217 void CM_PrependToField(struct CtdlMessage *Msg, eMsgField which, const char *buf, long length) {
218         if (Msg->cm_fields[which] != NULL) {
219                 long oldmsgsize;
220                 long newmsgsize;
221                 char *new;
222
223                 oldmsgsize = Msg->cm_lengths[which] + 1;
224                 newmsgsize = length + oldmsgsize;
225
226                 new = malloc(newmsgsize);
227                 memcpy(new, buf, length);
228                 memcpy(new + length, Msg->cm_fields[which], oldmsgsize);
229                 free(Msg->cm_fields[which]);
230                 Msg->cm_fields[which] = new;
231                 Msg->cm_lengths[which] = newmsgsize - 1;
232         }
233         else {
234                 Msg->cm_fields[which] = malloc(length + 1);
235                 memcpy(Msg->cm_fields[which], buf, length);
236                 Msg->cm_fields[which][length] = '\0';
237                 Msg->cm_lengths[which] = length;
238         }
239 }
240
241
242 void CM_SetAsField(struct CtdlMessage *Msg, eMsgField which, char **buf, long length) {
243         if (Msg->cm_fields[which] != NULL) {
244                 free (Msg->cm_fields[which]);
245         }
246
247         Msg->cm_fields[which] = *buf;
248         *buf = NULL;
249         if (length < 0) {                       // You can set the length to -1 to have CM_SetField measure it for you
250                 Msg->cm_lengths[which] = strlen(Msg->cm_fields[which]);
251         }
252         else {
253                 Msg->cm_lengths[which] = length;
254         }
255 }
256
257
258 void CM_SetAsFieldSB(struct CtdlMessage *Msg, eMsgField which, StrBuf **buf) {
259         if (Msg->cm_fields[which] != NULL) {
260                 free (Msg->cm_fields[which]);
261         }
262
263         Msg->cm_lengths[which] = StrLength(*buf);
264         Msg->cm_fields[which] = SmashStrBuf(buf);
265 }
266
267
268 void CM_GetAsField(struct CtdlMessage *Msg, eMsgField which, char **ret, long *retlen) {
269         if (Msg->cm_fields[which] != NULL) {
270                 *retlen = Msg->cm_lengths[which];
271                 *ret = Msg->cm_fields[which];
272                 Msg->cm_fields[which] = NULL;
273                 Msg->cm_lengths[which] = 0;
274         }
275         else {
276                 *ret = NULL;
277                 *retlen = 0;
278         }
279 }
280
281
282 // Returns 1 if the supplied pointer points to a valid Citadel message.
283 // If the pointer is NULL or the magic number check fails, returns 0.
284 int CM_IsValidMsg(struct CtdlMessage *msg) {
285         if (msg == NULL) {
286                 return 0;
287         }
288         if ((msg->cm_magic) != CTDLMESSAGE_MAGIC) {
289                 syslog(LOG_WARNING, "msgbase: CM_IsValidMsg() self-check failed");
290                 return 0;
291         }
292         return 1;
293 }
294
295
296 void CM_FreeContents(struct CtdlMessage *msg) {
297         int i;
298
299         for (i = 0; i < 256; ++i)
300                 if (msg->cm_fields[i] != NULL) {
301                         free(msg->cm_fields[i]);
302                         msg->cm_lengths[i] = 0;
303                 }
304
305         msg->cm_magic = 0;      // just in case
306 }
307
308
309 // 'Destructor' for struct CtdlMessage
310 void CM_Free(struct CtdlMessage *msg) {
311         if (CM_IsValidMsg(msg) == 0) {
312                 if (msg != NULL) free (msg);
313                 return;
314         }
315         CM_FreeContents(msg);
316         free(msg);
317 }
318
319
320 int CM_DupField(eMsgField i, struct CtdlMessage *OrgMsg, struct CtdlMessage *NewMsg) {
321         long len;
322         len = OrgMsg->cm_lengths[i];
323         NewMsg->cm_fields[i] = malloc(len + 1);
324         if (NewMsg->cm_fields[i] == NULL) {
325                 return 0;
326         }
327         memcpy(NewMsg->cm_fields[i], OrgMsg->cm_fields[i], len);
328         NewMsg->cm_fields[i][len] = '\0';
329         NewMsg->cm_lengths[i] = len;
330         return 1;
331 }
332
333
334 struct CtdlMessage *CM_Duplicate(struct CtdlMessage *OrgMsg) {
335         int i;
336         struct CtdlMessage *NewMsg;
337
338         if (CM_IsValidMsg(OrgMsg) == 0) {
339                 return NULL;
340         }
341         NewMsg = (struct CtdlMessage *)malloc(sizeof(struct CtdlMessage));
342         if (NewMsg == NULL) {
343                 return NULL;
344         }
345
346         memcpy(NewMsg, OrgMsg, sizeof(struct CtdlMessage));
347
348         memset(&NewMsg->cm_fields, 0, sizeof(char*) * 256);
349         
350         for (i = 0; i < 256; ++i) {
351                 if (OrgMsg->cm_fields[i] != NULL) {
352                         if (!CM_DupField(i, OrgMsg, NewMsg)) {
353                                 CM_Free(NewMsg);
354                                 return NULL;
355                         }
356                 }
357         }
358
359         return NewMsg;
360 }
361
362
363 // Determine if a given message matches the fields in a message template.
364 // Return 0 for a successful match.
365 int CtdlMsgCmp(struct CtdlMessage *msg, struct CtdlMessage *template) {
366         int i;
367
368         // If there aren't any fields in the template, all messages will match.
369         if (template == NULL) return(0);
370
371         // Null messages are bogus.
372         if (msg == NULL) return(1);
373
374         for (i='A'; i<='Z'; ++i) {
375                 if (template->cm_fields[i] != NULL) {
376                         if (msg->cm_fields[i] == NULL) {
377                                 // Considered equal if temmplate is empty string
378                                 if (IsEmptyStr(template->cm_fields[i])) continue;
379                                 return 1;
380                         }
381                         if ((template->cm_lengths[i] != msg->cm_lengths[i]) ||
382                             (strcasecmp(msg->cm_fields[i], template->cm_fields[i])))
383                                 return 1;
384                 }
385         }
386
387         /* All compares succeeded: we have a match! */
388         return 0;
389 }
390
391
392 // Retrieve the "seen" message list for the current room.
393 void CtdlGetSeen(char *buf, int which_set) {
394         visit vbuf;
395
396         // Learn about the user and room in question
397         CtdlGetRelationship(&vbuf, &CC->user, &CC->room);
398
399         if (which_set == ctdlsetseen_seen) {
400                 safestrncpy(buf, vbuf.v_seen, SIZ);
401         }
402         if (which_set == ctdlsetseen_answered) {
403                 safestrncpy(buf, vbuf.v_answered, SIZ);
404         }
405 }
406
407
408 // Manipulate the "seen msgs" string (or other message set strings)
409 void CtdlSetSeen(long *target_msgnums, int num_target_msgnums,
410                 int target_setting, int which_set,
411                 struct ctdluser *which_user, struct ctdlroom *which_room) {
412         struct cdbdata *cdbfr;
413         int i, k;
414         int is_seen = 0;
415         int was_seen = 0;
416         long lo = (-1L);
417         long hi = (-1L);
418         visit vbuf;
419         long *msglist;
420         int num_msgs = 0;
421         StrBuf *vset;
422         StrBuf *setstr;
423         StrBuf *lostr;
424         StrBuf *histr;
425         const char *pvset;
426         char *is_set;   // actually an array of booleans
427
428         // Don't bother doing *anything* if we were passed a list of zero messages
429         if (num_target_msgnums < 1) {
430                 return;
431         }
432
433         // If no room was specified, we go with the current room.
434         if (!which_room) {
435                 which_room = &CC->room;
436         }
437
438         // If no user was specified, we go with the current user.
439         if (!which_user) {
440                 which_user = &CC->user;
441         }
442
443         syslog(LOG_DEBUG, "msgbase: CtdlSetSeen(%d msgs starting with %ld, %s, %d) in <%s>",
444                    num_target_msgnums, target_msgnums[0],
445                    (target_setting ? "SET" : "CLEAR"),
446                    which_set,
447                    which_room->QRname);
448
449         // Learn about the user and room in question
450         CtdlGetRelationship(&vbuf, which_user, which_room);
451
452         // Load the message list
453         cdbfr = cdb_fetch(CDB_MSGLISTS, &which_room->QRnumber, sizeof(long));
454         if (cdbfr != NULL) {
455                 msglist = (long *) cdbfr->ptr;
456                 cdbfr->ptr = NULL;      // CtdlSetSeen() now owns this memory
457                 num_msgs = cdbfr->len / sizeof(long);
458                 cdb_free(cdbfr);
459         }
460         else {
461                 return; // No messages at all?  No further action.
462         }
463
464         is_set = malloc(num_msgs * sizeof(char));
465         memset(is_set, 0, (num_msgs * sizeof(char)) );
466
467         /* Decide which message set we're manipulating */
468         switch(which_set) {
469         case ctdlsetseen_seen:
470                 vset = NewStrBufPlain(vbuf.v_seen, -1);
471                 break;
472         case ctdlsetseen_answered:
473                 vset = NewStrBufPlain(vbuf.v_answered, -1);
474                 break;
475         default:
476                 vset = NewStrBuf();
477         }
478
479
480 #if 0   // This is a special diagnostic section.  Do not allow it to run during normal operation.
481         syslog(LOG_DEBUG, "There are %d messages in the room.\n", num_msgs);
482         for (i=0; i<num_msgs; ++i) {
483                 if ((i > 0) && (msglist[i] <= msglist[i-1])) abort();
484         }
485         syslog(LOG_DEBUG, "We are twiddling %d of them.\n", num_target_msgnums);
486         for (k=0; k<num_target_msgnums; ++k) {
487                 if ((k > 0) && (target_msgnums[k] <= target_msgnums[k-1])) abort();
488         }
489 #endif
490
491         // Translate the existing sequence set into an array of booleans
492         setstr = NewStrBuf();
493         lostr = NewStrBuf();
494         histr = NewStrBuf();
495         pvset = NULL;
496         while (StrBufExtract_NextToken(setstr, vset, &pvset, ',') >= 0) {
497
498                 StrBufExtract_token(lostr, setstr, 0, ':');
499                 if (StrBufNum_tokens(setstr, ':') >= 2) {
500                         StrBufExtract_token(histr, setstr, 1, ':');
501                 }
502                 else {
503                         FlushStrBuf(histr);
504                         StrBufAppendBuf(histr, lostr, 0);
505                 }
506                 lo = StrTol(lostr);
507                 if (!strcmp(ChrPtr(histr), "*")) {
508                         hi = LONG_MAX;
509                 }
510                 else {
511                         hi = StrTol(histr);
512                 }
513
514                 for (i = 0; i < num_msgs; ++i) {
515                         if ((msglist[i] >= lo) && (msglist[i] <= hi)) {
516                                 is_set[i] = 1;
517                         }
518                 }
519         }
520         FreeStrBuf(&setstr);
521         FreeStrBuf(&lostr);
522         FreeStrBuf(&histr);
523
524         // Now translate the array of booleans back into a sequence set
525         FlushStrBuf(vset);
526         was_seen = 0;
527         lo = (-1);
528         hi = (-1);
529
530         for (i=0; i<num_msgs; ++i) {
531                 is_seen = is_set[i];
532
533                 // Apply changes
534                 for (k=0; k<num_target_msgnums; ++k) {
535                         if (msglist[i] == target_msgnums[k]) {
536                                 is_seen = target_setting;
537                         }
538                 }
539
540                 if ((was_seen == 0) && (is_seen == 1)) {
541                         lo = msglist[i];
542                 }
543                 else if ((was_seen == 1) && (is_seen == 0)) {
544                         hi = msglist[i-1];
545
546                         if (StrLength(vset) > 0) {
547                                 StrBufAppendBufPlain(vset, HKEY(","), 0);
548                         }
549                         if (lo == hi) {
550                                 StrBufAppendPrintf(vset, "%ld", hi);
551                         }
552                         else {
553                                 StrBufAppendPrintf(vset, "%ld:%ld", lo, hi);
554                         }
555                 }
556
557                 if ((is_seen) && (i == num_msgs - 1)) {
558                         if (StrLength(vset) > 0) {
559                                 StrBufAppendBufPlain(vset, HKEY(","), 0);
560                         }
561                         if ((i==0) || (was_seen == 0)) {
562                                 StrBufAppendPrintf(vset, "%ld", msglist[i]);
563                         }
564                         else {
565                                 StrBufAppendPrintf(vset, "%ld:%ld", lo, msglist[i]);
566                         }
567                 }
568
569                 was_seen = is_seen;
570         }
571
572         // We will have to stuff this string back into a 4096 byte buffer, so if it's
573         // larger than that now, truncate it by removing tokens from the beginning.
574         // The limit of 100 iterations is there to prevent an infinite loop in case
575         // something unexpected happens.
576         int number_of_truncations = 0;
577         while ( (StrLength(vset) > SIZ) && (number_of_truncations < 100) ) {
578                 StrBufRemove_token(vset, 0, ',');
579                 ++number_of_truncations;
580         }
581
582         // If we're truncating the sequence set of messages marked with the 'seen' flag,
583         // we want the earliest messages (the truncated ones) to be marked, not unmarked.
584         // Otherwise messages at the beginning will suddenly appear to be 'unseen'.
585         if ( (which_set == ctdlsetseen_seen) && (number_of_truncations > 0) ) {
586                 StrBuf *first_tok;
587                 first_tok = NewStrBuf();
588                 StrBufExtract_token(first_tok, vset, 0, ',');
589                 StrBufRemove_token(vset, 0, ',');
590
591                 if (StrBufNum_tokens(first_tok, ':') > 1) {
592                         StrBufRemove_token(first_tok, 0, ':');
593                 }
594                 
595                 StrBuf *new_set;
596                 new_set = NewStrBuf();
597                 StrBufAppendBufPlain(new_set, HKEY("1:"), 0);
598                 StrBufAppendBuf(new_set, first_tok, 0);
599                 StrBufAppendBufPlain(new_set, HKEY(":"), 0);
600                 StrBufAppendBuf(new_set, vset, 0);
601
602                 FreeStrBuf(&vset);
603                 FreeStrBuf(&first_tok);
604                 vset = new_set;
605         }
606
607         // Decide which message set we're manipulating
608         switch (which_set) {
609                 case ctdlsetseen_seen:
610                         safestrncpy(vbuf.v_seen, ChrPtr(vset), sizeof vbuf.v_seen);
611                         break;
612                 case ctdlsetseen_answered:
613                         safestrncpy(vbuf.v_answered, ChrPtr(vset), sizeof vbuf.v_answered);
614                         break;
615         }
616
617         free(is_set);
618         free(msglist);
619         CtdlSetRelationship(&vbuf, which_user, which_room);
620         FreeStrBuf(&vset);
621 }
622
623
624 // API function to perform an operation for each qualifying message in the
625 // current room.  (Returns the number of messages processed.)
626 int CtdlForEachMessage(int mode, long ref, char *search_string,
627                         char *content_type,
628                         struct CtdlMessage *compare,
629                         ForEachMsgCallback CallBack,
630                         void *userdata)
631 {
632         int a, i, j;
633         visit vbuf;
634         struct cdbdata *cdbfr;
635         long *msglist = NULL;
636         int num_msgs = 0;
637         int num_processed = 0;
638         long thismsg;
639         struct MetaData smi;
640         struct CtdlMessage *msg = NULL;
641         int is_seen = 0;
642         long lastold = 0L;
643         int printed_lastold = 0;
644         int num_search_msgs = 0;
645         long *search_msgs = NULL;
646         regex_t re;
647         int need_to_free_re = 0;
648         regmatch_t pm;
649
650         if ((content_type) && (!IsEmptyStr(content_type))) {
651                 regcomp(&re, content_type, 0);
652                 need_to_free_re = 1;
653         }
654
655         /* Learn about the user and room in question */
656         if (server_shutting_down) {
657                 if (need_to_free_re) regfree(&re);
658                 return -1;
659         }
660         CtdlGetUser(&CC->user, CC->curr_user);
661
662         if (server_shutting_down) {
663                 if (need_to_free_re) regfree(&re);
664                 return -1;
665         }
666         CtdlGetRelationship(&vbuf, &CC->user, &CC->room);
667
668         if (server_shutting_down) {
669                 if (need_to_free_re) regfree(&re);
670                 return -1;
671         }
672
673         /* Load the message list */
674         cdbfr = cdb_fetch(CDB_MSGLISTS, &CC->room.QRnumber, sizeof(long));
675         if (cdbfr == NULL) {
676                 if (need_to_free_re) regfree(&re);
677                 return 0;       /* No messages at all?  No further action. */
678         }
679
680         msglist = (long *) cdbfr->ptr;
681         num_msgs = cdbfr->len / sizeof(long);
682
683         cdbfr->ptr = NULL;      /* clear this so that cdb_free() doesn't free it */
684         cdb_free(cdbfr);        /* we own this memory now */
685
686         /*
687          * Now begin the traversal.
688          */
689         if (num_msgs > 0) for (a = 0; a < num_msgs; ++a) {
690
691                 /* If the caller is looking for a specific MIME type, filter
692                  * out all messages which are not of the type requested.
693                  */
694                 if ((content_type != NULL) && (!IsEmptyStr(content_type))) {
695
696                         /* This call to GetMetaData() sits inside this loop
697                          * so that we only do the extra database read per msg
698                          * if we need to.  Doing the extra read all the time
699                          * really kills the server.  If we ever need to use
700                          * metadata for another search criterion, we need to
701                          * move the read somewhere else -- but still be smart
702                          * enough to only do the read if the caller has
703                          * specified something that will need it.
704                          */
705                         if (server_shutting_down) {
706                                 if (need_to_free_re) regfree(&re);
707                                 free(msglist);
708                                 return -1;
709                         }
710                         GetMetaData(&smi, msglist[a]);
711
712                         /* if (strcasecmp(smi.meta_content_type, content_type)) { old non-regex way */
713                         if (regexec(&re, smi.meta_content_type, 1, &pm, 0) != 0) {
714                                 msglist[a] = 0L;
715                         }
716                 }
717         }
718
719         num_msgs = sort_msglist(msglist, num_msgs);
720
721         /* If a template was supplied, filter out the messages which
722          * don't match.  (This could induce some delays!)
723          */
724         if (num_msgs > 0) {
725                 if (compare != NULL) {
726                         for (a = 0; a < num_msgs; ++a) {
727                                 if (server_shutting_down) {
728                                         if (need_to_free_re) regfree(&re);
729                                         free(msglist);
730                                         return -1;
731                                 }
732                                 msg = CtdlFetchMessage(msglist[a], 1);
733                                 if (msg != NULL) {
734                                         if (CtdlMsgCmp(msg, compare)) {
735                                                 msglist[a] = 0L;
736                                         }
737                                         CM_Free(msg);
738                                 }
739                         }
740                 }
741         }
742
743         /* If a search string was specified, get a message list from
744          * the full text index and remove messages which aren't on both
745          * lists.
746          *
747          * How this works:
748          * Since the lists are sorted and strictly ascending, and the
749          * output list is guaranteed to be shorter than or equal to the
750          * input list, we overwrite the bottom of the input list.  This
751          * eliminates the need to memmove big chunks of the list over and
752          * over again.
753          */
754         if ( (num_msgs > 0) && (mode == MSGS_SEARCH) && (search_string) ) {
755
756                 /* Call search module via hook mechanism.
757                  * NULL means use any search function available.
758                  * otherwise replace with a char * to name of search routine
759                  */
760                 CtdlModuleDoSearch(&num_search_msgs, &search_msgs, search_string, "fulltext");
761
762                 if (num_search_msgs > 0) {
763         
764                         int orig_num_msgs;
765
766                         orig_num_msgs = num_msgs;
767                         num_msgs = 0;
768                         for (i=0; i<orig_num_msgs; ++i) {
769                                 for (j=0; j<num_search_msgs; ++j) {
770                                         if (msglist[i] == search_msgs[j]) {
771                                                 msglist[num_msgs++] = msglist[i];
772                                         }
773                                 }
774                         }
775                 }
776                 else {
777                         num_msgs = 0;   /* No messages qualify */
778                 }
779                 if (search_msgs != NULL) free(search_msgs);
780
781                 /* Now that we've purged messages which don't contain the search
782                  * string, treat a MSGS_SEARCH just like a MSGS_ALL from this
783                  * point on.
784                  */
785                 mode = MSGS_ALL;
786         }
787
788         /*
789          * Now iterate through the message list, according to the
790          * criteria supplied by the caller.
791          */
792         if (num_msgs > 0)
793                 for (a = 0; a < num_msgs; ++a) {
794                         if (server_shutting_down) {
795                                 if (need_to_free_re) regfree(&re);
796                                 free(msglist);
797                                 return num_processed;
798                         }
799                         thismsg = msglist[a];
800                         if (mode == MSGS_ALL) {
801                                 is_seen = 0;
802                         }
803                         else {
804                                 is_seen = is_msg_in_sequence_set(
805                                                         vbuf.v_seen, thismsg);
806                                 if (is_seen) lastold = thismsg;
807                         }
808                         if ((thismsg > 0L)
809                             && (
810
811                                        (mode == MSGS_ALL)
812                                        || ((mode == MSGS_OLD) && (is_seen))
813                                        || ((mode == MSGS_NEW) && (!is_seen))
814                                        || ((mode == MSGS_LAST) && (a >= (num_msgs - ref)))
815                                    || ((mode == MSGS_FIRST) && (a < ref))
816                                 || ((mode == MSGS_GT) && (thismsg > ref))
817                                 || ((mode == MSGS_LT) && (thismsg < ref))
818                                 || ((mode == MSGS_EQ) && (thismsg == ref))
819                             )
820                             ) {
821                                 if ((mode == MSGS_NEW) && (CC->user.flags & US_LASTOLD) && (lastold > 0L) && (printed_lastold == 0) && (!is_seen)) {
822                                         if (CallBack) {
823                                                 CallBack(lastold, userdata);
824                                         }
825                                         printed_lastold = 1;
826                                         ++num_processed;
827                                 }
828                                 if (CallBack) {
829                                         CallBack(thismsg, userdata);
830                                 }
831                                 ++num_processed;
832                         }
833                 }
834         if (need_to_free_re) regfree(&re);
835
836         /*
837          * We cache the most recent msglist in order to do security checks later
838          */
839         if (CC->client_socket > 0) {
840                 if (CC->cached_msglist != NULL) {
841                         free(CC->cached_msglist);
842                 }
843                 CC->cached_msglist = msglist;
844                 CC->cached_num_msgs = num_msgs;
845         }
846         else {
847                 free(msglist);
848         }
849
850         return num_processed;
851 }
852
853
854 /*
855  * memfmout()  -  Citadel text formatter and paginator.
856  *           Although the original purpose of this routine was to format
857  *           text to the reader's screen width, all we're really using it
858  *           for here is to format text out to 80 columns before sending it
859  *           to the client.  The client software may reformat it again.
860  */
861 void memfmout(
862         char *mptr,             /* where are we going to get our text from? */
863         const char *nl          /* string to terminate lines with */
864 ) {
865         int column = 0;
866         unsigned char ch = 0;
867         char outbuf[1024];
868         int len = 0;
869         int nllen = 0;
870
871         if (!mptr) return;
872         nllen = strlen(nl);
873         while (ch=*(mptr++), ch != 0) {
874
875                 if (ch == '\n') {
876                         if (client_write(outbuf, len) == -1) {
877                                 syslog(LOG_ERR, "msgbase: memfmout() aborting due to write failure");
878                                 return;
879                         }
880                         len = 0;
881                         if (client_write(nl, nllen) == -1) {
882                                 syslog(LOG_ERR, "msgbase: memfmout() aborting due to write failure");
883                                 return;
884                         }
885                         column = 0;
886                 }
887                 else if (ch == '\r') {
888                         /* Ignore carriage returns.  Newlines are always LF or CRLF but never CR. */
889                 }
890                 else if (isspace(ch)) {
891                         if (column > 72) {              /* Beyond 72 columns, break on the next space */
892                                 if (client_write(outbuf, len) == -1) {
893                                         syslog(LOG_ERR, "msgbase: memfmout() aborting due to write failure");
894                                         return;
895                                 }
896                                 len = 0;
897                                 if (client_write(nl, nllen) == -1) {
898                                         syslog(LOG_ERR, "msgbase: memfmout() aborting due to write failure");
899                                         return;
900                                 }
901                                 column = 0;
902                         }
903                         else {
904                                 outbuf[len++] = ch;
905                                 ++column;
906                         }
907                 }
908                 else {
909                         outbuf[len++] = ch;
910                         ++column;
911                         if (column > 1000) {            /* Beyond 1000 columns, break anywhere */
912                                 if (client_write(outbuf, len) == -1) {
913                                         syslog(LOG_ERR, "msgbase: memfmout() aborting due to write failure");
914                                         return;
915                                 }
916                                 len = 0;
917                                 if (client_write(nl, nllen) == -1) {
918                                         syslog(LOG_ERR, "msgbase: memfmout(): aborting due to write failure");
919                                         return;
920                                 }
921                                 column = 0;
922                         }
923                 }
924         }
925         if (len) {
926                 if (client_write(outbuf, len) == -1) {
927                         syslog(LOG_ERR, "msgbase: memfmout() aborting due to write failure");
928                         return;
929                 }
930                 client_write(nl, nllen);
931                 column = 0;
932         }
933 }
934
935
936 /*
937  * Callback function for mime parser that simply lists the part
938  */
939 void list_this_part(char *name, char *filename, char *partnum, char *disp,
940                     void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
941                     char *cbid, void *cbuserdata)
942 {
943         struct ma_info *ma;
944         
945         ma = (struct ma_info *)cbuserdata;
946         if (ma->is_ma == 0) {
947                 cprintf("part=%s|%s|%s|%s|%s|%ld|%s|%s\n",
948                         name, 
949                         filename, 
950                         partnum, 
951                         disp, 
952                         cbtype, 
953                         (long)length, 
954                         cbid, 
955                         cbcharset);
956         }
957 }
958
959
960 /* 
961  * Callback function for multipart prefix
962  */
963 void list_this_pref(char *name, char *filename, char *partnum, char *disp,
964                     void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
965                     char *cbid, void *cbuserdata)
966 {
967         struct ma_info *ma;
968         
969         ma = (struct ma_info *)cbuserdata;
970         if (!strcasecmp(cbtype, "multipart/alternative")) {
971                 ++ma->is_ma;
972         }
973
974         if (ma->is_ma == 0) {
975                 cprintf("pref=%s|%s\n", partnum, cbtype);
976         }
977 }
978
979
980 /* 
981  * Callback function for multipart sufffix
982  */
983 void list_this_suff(char *name, char *filename, char *partnum, char *disp,
984                     void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
985                     char *cbid, void *cbuserdata)
986 {
987         struct ma_info *ma;
988         
989         ma = (struct ma_info *)cbuserdata;
990         if (ma->is_ma == 0) {
991                 cprintf("suff=%s|%s\n", partnum, cbtype);
992         }
993         if (!strcasecmp(cbtype, "multipart/alternative")) {
994                 --ma->is_ma;
995         }
996 }
997
998
999 /*
1000  * Callback function for mime parser that opens a section for downloading
1001  * we use serv_files function here: 
1002  */
1003 extern void OpenCmdResult(char *filename, const char *mime_type);
1004 void mime_download(char *name, char *filename, char *partnum, char *disp,
1005                    void *content, char *cbtype, char *cbcharset, size_t length,
1006                    char *encoding, char *cbid, void *cbuserdata)
1007 {
1008         int rv = 0;
1009
1010         /* Silently go away if there's already a download open. */
1011         if (CC->download_fp != NULL)
1012                 return;
1013
1014         if (
1015                 (!IsEmptyStr(partnum) && (!strcasecmp(CC->download_desired_section, partnum)))
1016         ||      (!IsEmptyStr(cbid) && (!strcasecmp(CC->download_desired_section, cbid)))
1017         ) {
1018                 CC->download_fp = tmpfile();
1019                 if (CC->download_fp == NULL) {
1020                         syslog(LOG_ERR, "msgbase: mime_download() couldn't write: %m");
1021                         cprintf("%d cannot open temporary file: %s\n", ERROR + INTERNAL_ERROR, strerror(errno));
1022                         return;
1023                 }
1024         
1025                 rv = fwrite(content, length, 1, CC->download_fp);
1026                 if (rv <= 0) {
1027                         syslog(LOG_ERR, "msgbase: mime_download() Couldn't write: %m");
1028                         cprintf("%d unable to write tempfile.\n", ERROR + TOO_BIG);
1029                         fclose(CC->download_fp);
1030                         CC->download_fp = NULL;
1031                         return;
1032                 }
1033                 fflush(CC->download_fp);
1034                 rewind(CC->download_fp);
1035         
1036                 OpenCmdResult(filename, cbtype);
1037         }
1038 }
1039
1040
1041 /*
1042  * Callback function for mime parser that outputs a section all at once.
1043  * We can specify the desired section by part number *or* content-id.
1044  */
1045 void mime_spew_section(char *name, char *filename, char *partnum, char *disp,
1046                    void *content, char *cbtype, char *cbcharset, size_t length,
1047                    char *encoding, char *cbid, void *cbuserdata)
1048 {
1049         int *found_it = (int *)cbuserdata;
1050
1051         if (
1052                 (!IsEmptyStr(partnum) && (!strcasecmp(CC->download_desired_section, partnum)))
1053         ||      (!IsEmptyStr(cbid) && (!strcasecmp(CC->download_desired_section, cbid)))
1054         ) {
1055                 *found_it = 1;
1056                 cprintf("%d %d|-1|%s|%s|%s\n",
1057                         BINARY_FOLLOWS,
1058                         (int)length,
1059                         filename,
1060                         cbtype,
1061                         cbcharset
1062                 );
1063                 client_write(content, length);
1064         }
1065 }
1066
1067
1068 struct CtdlMessage *CtdlDeserializeMessage(long msgnum, int with_body, const char *Buffer, long Length)
1069 {
1070         struct CtdlMessage *ret = NULL;
1071         const char *mptr;
1072         const char *upper_bound;
1073         cit_uint8_t ch;
1074         cit_uint8_t field_header;
1075         eMsgField which;
1076
1077         mptr = Buffer;
1078         upper_bound = Buffer + Length;
1079         if (msgnum <= 0) {
1080                 return NULL;
1081         }
1082
1083         // Parse the three bytes that begin EVERY message on disk.
1084         // The first is always 0xFF, the on-disk magic number.
1085         // The second is the anonymous/public type byte.
1086         // The third is the format type byte (vari, fixed, or MIME).
1087         //
1088         ch = *mptr++;
1089         if (ch != 255) {
1090                 syslog(LOG_ERR, "msgbase: message %ld appears to be corrupted", msgnum);
1091                 return NULL;
1092         }
1093         ret = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
1094         memset(ret, 0, sizeof(struct CtdlMessage));
1095
1096         ret->cm_magic = CTDLMESSAGE_MAGIC;
1097         ret->cm_anon_type = *mptr++;                            // Anon type byte
1098         ret->cm_format_type = *mptr++;                          // Format type byte
1099
1100         // The rest is zero or more arbitrary fields.  Load them in.
1101         // We're done when we encounter either a zero-length field or
1102         // have just processed the 'M' (message text) field.
1103         //
1104         do {
1105                 field_header = '\0';
1106                 long len;
1107
1108                 while (field_header == '\0') {                  // work around possibly buggy messages
1109                         if (mptr >= upper_bound) {
1110                                 break;
1111                         }
1112                         field_header = *mptr++;
1113                 }
1114                 if (mptr >= upper_bound) {
1115                         break;
1116                 }
1117                 which = field_header;
1118                 len = strlen(mptr);
1119
1120                 CM_SetField(ret, which, mptr, len);
1121
1122                 mptr += len + 1;                                // advance to next field
1123
1124         } while ((mptr < upper_bound) && (field_header != 'M'));
1125         return (ret);
1126 }
1127
1128
1129 // Load a message from disk into memory.
1130 // This is used by CtdlOutputMsg() and other fetch functions.
1131 //
1132 // NOTE: Caller is responsible for freeing the returned CtdlMessage struct
1133 //       using the CM_Free(); function.
1134 //
1135 struct CtdlMessage *CtdlFetchMessage(long msgnum, int with_body) {
1136         struct cdbdata *dmsgtext;
1137         struct CtdlMessage *ret = NULL;
1138
1139         syslog(LOG_DEBUG, "msgbase: CtdlFetchMessage(%ld, %d)", msgnum, with_body);
1140         dmsgtext = cdb_fetch(CDB_MSGMAIN, &msgnum, sizeof(long));
1141         if (dmsgtext == NULL) {
1142                 syslog(LOG_ERR, "msgbase: message #%ld was not found", msgnum);
1143                 return NULL;
1144         }
1145
1146         if (dmsgtext->ptr[dmsgtext->len - 1] != '\0') {
1147                 syslog(LOG_ERR, "msgbase: CtdlFetchMessage(%ld, %d) Forcefully terminating message!!", msgnum, with_body);
1148                 dmsgtext->ptr[dmsgtext->len - 1] = '\0';
1149         }
1150
1151         ret = CtdlDeserializeMessage(msgnum, with_body, dmsgtext->ptr, dmsgtext->len);
1152
1153         cdb_free(dmsgtext);
1154
1155         if (ret == NULL) {
1156                 return NULL;
1157         }
1158
1159         // Always make sure there's something in the msg text field.  If
1160         // it's NULL, the message text is most likely stored separately,
1161         // so go ahead and fetch that.  Failing that, just set a dummy
1162         // body so other code doesn't barf.
1163         //
1164         if ( (CM_IsEmpty(ret, eMesageText)) && (with_body) ) {
1165                 dmsgtext = cdb_fetch(CDB_BIGMSGS, &msgnum, sizeof(long));
1166                 if (dmsgtext != NULL) {
1167                         CM_SetAsField(ret, eMesageText, &dmsgtext->ptr, dmsgtext->len - 1);
1168                         cdb_free(dmsgtext);
1169                 }
1170         }
1171         if (CM_IsEmpty(ret, eMesageText)) {
1172                 CM_SetField(ret, eMesageText, HKEY("\r\n\r\n (no text)\r\n"));
1173         }
1174
1175         return (ret);
1176 }
1177
1178
1179 // Pre callback function for multipart/alternative
1180 //
1181 // NOTE: this differs from the standard behavior for a reason.  Normally when
1182 //       displaying multipart/alternative you want to show the _last_ usable
1183 //       format in the message.  Here we show the _first_ one, because it's
1184 //       usually text/plain.  Since this set of functions is designed for text
1185 //       output to non-MIME-aware clients, this is the desired behavior.
1186 //
1187 void fixed_output_pre(char *name, char *filename, char *partnum, char *disp,
1188                 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
1189                 char *cbid, void *cbuserdata)
1190 {
1191         struct ma_info *ma;
1192         
1193         ma = (struct ma_info *)cbuserdata;
1194         syslog(LOG_DEBUG, "msgbase: fixed_output_pre() type=<%s>", cbtype);     
1195         if (!strcasecmp(cbtype, "multipart/alternative")) {
1196                 ++ma->is_ma;
1197                 ma->did_print = 0;
1198         }
1199         if (!strcasecmp(cbtype, "message/rfc822")) {
1200                 ++ma->freeze;
1201         }
1202 }
1203
1204
1205 //
1206 // Post callback function for multipart/alternative
1207 //
1208 void fixed_output_post(char *name, char *filename, char *partnum, char *disp,
1209                 void *content, char *cbtype, char *cbcharset, size_t length,
1210                 char *encoding, char *cbid, void *cbuserdata)
1211 {
1212         struct ma_info *ma;
1213         
1214         ma = (struct ma_info *)cbuserdata;
1215         syslog(LOG_DEBUG, "msgbase: fixed_output_post() type=<%s>", cbtype);    
1216         if (!strcasecmp(cbtype, "multipart/alternative")) {
1217                 --ma->is_ma;
1218                 ma->did_print = 0;
1219         }
1220         if (!strcasecmp(cbtype, "message/rfc822")) {
1221                 --ma->freeze;
1222         }
1223 }
1224
1225
1226 // Inline callback function for mime parser that wants to display text
1227 //
1228 void fixed_output(char *name, char *filename, char *partnum, char *disp,
1229                 void *content, char *cbtype, char *cbcharset, size_t length,
1230                 char *encoding, char *cbid, void *cbuserdata)
1231 {
1232         char *ptr;
1233         char *wptr;
1234         size_t wlen;
1235         struct ma_info *ma;
1236
1237         ma = (struct ma_info *)cbuserdata;
1238
1239         syslog(LOG_DEBUG,
1240                 "msgbase: fixed_output() part %s: %s (%s) (%ld bytes)",
1241                 partnum, filename, cbtype, (long)length
1242         );
1243
1244         // If we're in the middle of a multipart/alternative scope and
1245         // we've already printed another section, skip this one.
1246         //      
1247         if ( (ma->is_ma) && (ma->did_print) ) {
1248                 syslog(LOG_DEBUG, "msgbase: skipping part %s (%s)", partnum, cbtype);
1249                 return;
1250         }
1251         ma->did_print = 1;
1252
1253         if ( (!strcasecmp(cbtype, "text/plain")) 
1254            || (IsEmptyStr(cbtype)) ) {
1255                 wptr = content;
1256                 if (length > 0) {
1257                         client_write(wptr, length);
1258                         if (wptr[length-1] != '\n') {
1259                                 cprintf("\n");
1260                         }
1261                 }
1262                 return;
1263         }
1264
1265         if (!strcasecmp(cbtype, "text/html")) {
1266                 ptr = html_to_ascii(content, length, 80);
1267                 wlen = strlen(ptr);
1268                 client_write(ptr, wlen);
1269                 if ((wlen > 0) && (ptr[wlen-1] != '\n')) {
1270                         cprintf("\n");
1271                 }
1272                 free(ptr);
1273                 return;
1274         }
1275
1276         if (ma->use_fo_hooks) {
1277                 if (PerformFixedOutputHooks(cbtype, content, length)) {         // returns nonzero if it handled the part
1278                         return;
1279                 }
1280         }
1281
1282         if (strncasecmp(cbtype, "multipart/", 10)) {
1283                 cprintf("Part %s: %s (%s) (%ld bytes)\r\n",
1284                         partnum, filename, cbtype, (long)length);
1285                 return;
1286         }
1287 }
1288
1289
1290 // The client is elegant and sophisticated and wants to be choosy about
1291 // MIME content types, so figure out which multipart/alternative part
1292 // we're going to send.
1293 //
1294 // We use a system of weights.  When we find a part that matches one of the
1295 // MIME types we've declared as preferential, we can store it in ma->chosen_part
1296 // and then set ma->chosen_pref to that MIME type's position in our preference
1297 // list.  If we then hit another match, we only replace the first match if
1298 // the preference value is lower.
1299 //
1300 void choose_preferred(char *name, char *filename, char *partnum, char *disp,
1301                 void *content, char *cbtype, char *cbcharset, size_t length,
1302                 char *encoding, char *cbid, void *cbuserdata)
1303 {
1304         char buf[1024];
1305         int i;
1306         struct ma_info *ma;
1307         
1308         ma = (struct ma_info *)cbuserdata;
1309
1310         for (i=0; i<num_tokens(CC->preferred_formats, '|'); ++i) {
1311                 extract_token(buf, CC->preferred_formats, i, '|', sizeof buf);
1312                 if ( (!strcasecmp(buf, cbtype)) && (!ma->freeze) ) {
1313                         if (i < ma->chosen_pref) {
1314                                 syslog(LOG_DEBUG, "msgbase: setting chosen part to <%s>", partnum);
1315                                 safestrncpy(ma->chosen_part, partnum, sizeof ma->chosen_part);
1316                                 ma->chosen_pref = i;
1317                         }
1318                 }
1319         }
1320 }
1321
1322
1323 // Now that we've chosen our preferred part, output it.
1324 //
1325 void output_preferred(char *name, 
1326                       char *filename, 
1327                       char *partnum, 
1328                       char *disp,
1329                       void *content, 
1330                       char *cbtype, 
1331                       char *cbcharset, 
1332                       size_t length,
1333                       char *encoding, 
1334                       char *cbid, 
1335                       void *cbuserdata)
1336 {
1337         int i;
1338         char buf[128];
1339         int add_newline = 0;
1340         char *text_content;
1341         struct ma_info *ma;
1342         char *decoded = NULL;
1343         size_t bytes_decoded;
1344         int rc = 0;
1345
1346         ma = (struct ma_info *)cbuserdata;
1347
1348         // This is not the MIME part you're looking for...
1349         if (strcasecmp(partnum, ma->chosen_part)) return;
1350
1351         // If the content-type of this part is in our preferred formats
1352         // list, we can simply output it verbatim.
1353         for (i=0; i<num_tokens(CC->preferred_formats, '|'); ++i) {
1354                 extract_token(buf, CC->preferred_formats, i, '|', sizeof buf);
1355                 if (!strcasecmp(buf, cbtype)) {
1356                         /* Yeah!  Go!  W00t!! */
1357                         if (ma->dont_decode == 0) 
1358                                 rc = mime_decode_now (content, 
1359                                                       length,
1360                                                       encoding,
1361                                                       &decoded,
1362                                                       &bytes_decoded);
1363                         if (rc < 0)
1364                                 break; // Give us the chance, maybe theres another one.
1365
1366                         if (rc == 0) text_content = (char *)content;
1367                         else {
1368                                 text_content = decoded;
1369                                 length = bytes_decoded;
1370                         }
1371
1372                         if (text_content[length-1] != '\n') {
1373                                 ++add_newline;
1374                         }
1375                         cprintf("Content-type: %s", cbtype);
1376                         if (!IsEmptyStr(cbcharset)) {
1377                                 cprintf("; charset=%s", cbcharset);
1378                         }
1379                         cprintf("\nContent-length: %d\n",
1380                                 (int)(length + add_newline) );
1381                         if (!IsEmptyStr(encoding)) {
1382                                 cprintf("Content-transfer-encoding: %s\n", encoding);
1383                         }
1384                         else {
1385                                 cprintf("Content-transfer-encoding: 7bit\n");
1386                         }
1387                         cprintf("X-Citadel-MSG4-Partnum: %s\n", partnum);
1388                         cprintf("\n");
1389                         if (client_write(text_content, length) == -1)
1390                         {
1391                                 syslog(LOG_ERR, "msgbase: output_preferred() aborting due to write failure");
1392                                 return;
1393                         }
1394                         if (add_newline) cprintf("\n");
1395                         if (decoded != NULL) free(decoded);
1396                         return;
1397                 }
1398         }
1399
1400         // No translations required or possible: output as text/plain
1401         cprintf("Content-type: text/plain\n\n");
1402         rc = 0;
1403         if (ma->dont_decode == 0)
1404                 rc = mime_decode_now (content, 
1405                                       length,
1406                                       encoding,
1407                                       &decoded,
1408                                       &bytes_decoded);
1409         if (rc < 0)
1410                 return; // Give us the chance, maybe theres another one.
1411         
1412         if (rc == 0) text_content = (char *)content;
1413         else {
1414                 text_content = decoded;
1415                 length = bytes_decoded;
1416         }
1417
1418         fixed_output(name, filename, partnum, disp, text_content, cbtype, cbcharset, length, encoding, cbid, cbuserdata);
1419         if (decoded != NULL) free(decoded);
1420 }
1421
1422
1423 struct encapmsg {
1424         char desired_section[64];
1425         char *msg;
1426         size_t msglen;
1427 };
1428
1429
1430 // Callback function
1431 void extract_encapsulated_message(char *name, char *filename, char *partnum, char *disp,
1432                    void *content, char *cbtype, char *cbcharset, size_t length,
1433                    char *encoding, char *cbid, void *cbuserdata)
1434 {
1435         struct encapmsg *encap;
1436
1437         encap = (struct encapmsg *)cbuserdata;
1438
1439         // Only proceed if this is the desired section...
1440         if (!strcasecmp(encap->desired_section, partnum)) {
1441                 encap->msglen = length;
1442                 encap->msg = malloc(length + 2);
1443                 memcpy(encap->msg, content, length);
1444                 return;
1445         }
1446 }
1447
1448
1449 // Determine whether the specified message exists in the cached_msglist
1450 // (This is a security check)
1451 int check_cached_msglist(long msgnum) {
1452
1453         // cases in which we skip the check
1454         if (!CC) return om_ok;                                          // not a session
1455         if (CC->client_socket <= 0) return om_ok;                       // not a client session
1456         if (CC->cached_msglist == NULL) return om_access_denied;        // no msglist fetched
1457         if (CC->cached_num_msgs == 0) return om_access_denied;          // nothing to check 
1458
1459         // Do a binary search within the cached_msglist for the requested msgnum
1460         int min = 0;
1461         int max = (CC->cached_num_msgs - 1);
1462
1463         while (max >= min) {
1464                 int middle = min + (max-min) / 2 ;
1465                 if (msgnum == CC->cached_msglist[middle]) {
1466                         return om_ok;
1467                 }
1468                 if (msgnum > CC->cached_msglist[middle]) {
1469                         min = middle + 1;
1470                 }
1471                 else {
1472                         max = middle - 1;
1473                 }
1474         }
1475
1476         return om_access_denied;
1477 }
1478
1479
1480 // Get a message off disk.  (returns om_* values found in msgbase.h)
1481 int CtdlOutputMsg(long msg_num,         // message number (local) to fetch
1482                 int mode,               // how would you like that message?
1483                 int headers_only,       // eschew the message body?
1484                 int do_proto,           // do Citadel protocol responses?
1485                 int crlf,               // Use CRLF newlines instead of LF?
1486                 char *section,          // NULL or a message/rfc822 section
1487                 int flags,              // various flags; see msgbase.h
1488                 char **Author,
1489                 char **Address,
1490                 char **MessageID
1491 ) {
1492         struct CtdlMessage *TheMessage = NULL;
1493         int retcode = CIT_OK;
1494         struct encapmsg encap;
1495         int r;
1496
1497         syslog(LOG_DEBUG, "msgbase: CtdlOutputMsg(msgnum=%ld, mode=%d, section=%s)", 
1498                 msg_num, mode,
1499                 (section ? section : "<>")
1500         );
1501
1502         r = CtdlDoIHavePermissionToReadMessagesInThisRoom();
1503         if (r != om_ok) {
1504                 if (do_proto) {
1505                         if (r == om_not_logged_in) {
1506                                 cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
1507                         }
1508                         else {
1509                                 cprintf("%d An unknown error has occurred.\n", ERROR);
1510                         }
1511                 }
1512                 return(r);
1513         }
1514
1515         /*
1516          * Check to make sure the message is actually IN this room
1517          */
1518         r = check_cached_msglist(msg_num);
1519         if (r == om_access_denied) {
1520                 /* Not in the cache?  We get ONE shot to check it again. */
1521                 CtdlForEachMessage(MSGS_ALL, 0L, NULL, NULL, NULL, NULL, NULL);
1522                 r = check_cached_msglist(msg_num);
1523         }
1524         if (r != om_ok) {
1525                 syslog(LOG_DEBUG, "msgbase: security check fail; message %ld is not in %s",
1526                            msg_num, CC->room.QRname
1527                 );
1528                 if (do_proto) {
1529                         if (r == om_access_denied) {
1530                                 cprintf("%d message %ld was not found in this room\n",
1531                                         ERROR + HIGHER_ACCESS_REQUIRED,
1532                                         msg_num
1533                                 );
1534                         }
1535                 }
1536                 return(r);
1537         }
1538
1539         /*
1540          * Fetch the message from disk.  If we're in HEADERS_FAST mode,
1541          * request that we don't even bother loading the body into memory.
1542          */
1543         if (headers_only == HEADERS_FAST) {
1544                 TheMessage = CtdlFetchMessage(msg_num, 0);
1545         }
1546         else {
1547                 TheMessage = CtdlFetchMessage(msg_num, 1);
1548         }
1549
1550         if (TheMessage == NULL) {
1551                 if (do_proto) cprintf("%d Can't locate msg %ld on disk\n",
1552                         ERROR + MESSAGE_NOT_FOUND, msg_num);
1553                 return(om_no_such_msg);
1554         }
1555
1556         /* Here is the weird form of this command, to process only an
1557          * encapsulated message/rfc822 section.
1558          */
1559         if (section) if (!IsEmptyStr(section)) if (strcmp(section, "0")) {
1560                 memset(&encap, 0, sizeof encap);
1561                 safestrncpy(encap.desired_section, section, sizeof encap.desired_section);
1562                 mime_parser(CM_RANGE(TheMessage, eMesageText),
1563                             *extract_encapsulated_message,
1564                             NULL, NULL, (void *)&encap, 0
1565                         );
1566
1567                 if ((Author != NULL) && (*Author == NULL))
1568                 {
1569                         long len;
1570                         CM_GetAsField(TheMessage, eAuthor, Author, &len);
1571                 }
1572                 if ((Address != NULL) && (*Address == NULL))
1573                 {       
1574                         long len;
1575                         CM_GetAsField(TheMessage, erFc822Addr, Address, &len);
1576                 }
1577                 if ((MessageID != NULL) && (*MessageID == NULL))
1578                 {       
1579                         long len;
1580                         CM_GetAsField(TheMessage, emessageId, MessageID, &len);
1581                 }
1582                 CM_Free(TheMessage);
1583                 TheMessage = NULL;
1584
1585                 if (encap.msg) {
1586                         encap.msg[encap.msglen] = 0;
1587                         TheMessage = convert_internet_message(encap.msg);
1588                         encap.msg = NULL;       /* no free() here, TheMessage owns it now */
1589
1590                         /* Now we let it fall through to the bottom of this
1591                          * function, because TheMessage now contains the
1592                          * encapsulated message instead of the top-level
1593                          * message.  Isn't that neat?
1594                          */
1595                 }
1596                 else {
1597                         if (do_proto) {
1598                                 cprintf("%d msg %ld has no part %s\n",
1599                                         ERROR + MESSAGE_NOT_FOUND,
1600                                         msg_num,
1601                                         section);
1602                         }
1603                         retcode = om_no_such_msg;
1604                 }
1605
1606         }
1607
1608         /* Ok, output the message now */
1609         if (retcode == CIT_OK)
1610                 retcode = CtdlOutputPreLoadedMsg(TheMessage, mode, headers_only, do_proto, crlf, flags);
1611         if ((Author != NULL) && (*Author == NULL))
1612         {
1613                 long len;
1614                 CM_GetAsField(TheMessage, eAuthor, Author, &len);
1615         }
1616         if ((Address != NULL) && (*Address == NULL))
1617         {       
1618                 long len;
1619                 CM_GetAsField(TheMessage, erFc822Addr, Address, &len);
1620         }
1621         if ((MessageID != NULL) && (*MessageID == NULL))
1622         {       
1623                 long len;
1624                 CM_GetAsField(TheMessage, emessageId, MessageID, &len);
1625         }
1626
1627         CM_Free(TheMessage);
1628
1629         return(retcode);
1630 }
1631
1632
1633 void OutputCtdlMsgHeaders(struct CtdlMessage *TheMessage, int do_proto) {
1634         int i;
1635         char buf[SIZ];
1636         char display_name[256];
1637
1638         /* begin header processing loop for Citadel message format */
1639         safestrncpy(display_name, "<unknown>", sizeof display_name);
1640         if (!CM_IsEmpty(TheMessage, eAuthor)) {
1641                 strcpy(buf, TheMessage->cm_fields[eAuthor]);
1642                 if (TheMessage->cm_anon_type == MES_ANONONLY) {
1643                         safestrncpy(display_name, "****", sizeof display_name);
1644                 }
1645                 else if (TheMessage->cm_anon_type == MES_ANONOPT) {
1646                         safestrncpy(display_name, "anonymous", sizeof display_name);
1647                 }
1648                 else {
1649                         safestrncpy(display_name, buf, sizeof display_name);
1650                 }
1651                 if ((is_room_aide())
1652                     && ((TheMessage->cm_anon_type == MES_ANONONLY)
1653                         || (TheMessage->cm_anon_type == MES_ANONOPT))) {
1654                         size_t tmp = strlen(display_name);
1655                         snprintf(&display_name[tmp],
1656                                  sizeof display_name - tmp,
1657                                  " [%s]", buf);
1658                 }
1659         }
1660
1661         /* Now spew the header fields in the order we like them. */
1662         for (i=0; i< NDiskFields; ++i) {
1663                 eMsgField Field;
1664                 Field = FieldOrder[i];
1665                 if (Field != eMesageText) {
1666                         if ( (!CM_IsEmpty(TheMessage, Field)) && (msgkeys[Field] != NULL) ) {
1667                                 if ((Field == eenVelopeTo) || (Field == eRecipient) || (Field == eCarbonCopY)) {
1668                                         sanitize_truncated_recipient(TheMessage->cm_fields[Field]);
1669                                 }
1670                                 if (Field == eAuthor) {
1671                                         if (do_proto) {
1672                                                 cprintf("%s=%s\n", msgkeys[Field], display_name);
1673                                         }
1674                                 }
1675                                 /* Masquerade display name if needed */
1676                                 else {
1677                                         if (do_proto) {
1678                                                 cprintf("%s=%s\n", msgkeys[Field], TheMessage->cm_fields[Field]);
1679                                         }
1680                                 }
1681                                 /* Give the client a hint about whether the message originated locally */
1682                                 if (Field == erFc822Addr) {
1683                                         if (IsDirectory(TheMessage->cm_fields[Field] ,0)) {
1684                                                 cprintf("locl=yes\n");                          // message originated locally.
1685                                         }
1686
1687
1688
1689                                 }
1690                         }
1691                 }
1692         }
1693 }
1694
1695
1696 void OutputRFC822MsgHeaders(
1697         struct CtdlMessage *TheMessage,
1698         int flags,              /* should the message be exported clean */
1699         const char *nl, int nlen,
1700         char *mid, long sizeof_mid,
1701         char *suser, long sizeof_suser,
1702         char *luser, long sizeof_luser,
1703         char *fuser, long sizeof_fuser,
1704         char *snode, long sizeof_snode)
1705 {
1706         char datestamp[100];
1707         int subject_found = 0;
1708         char buf[SIZ];
1709         int i, j, k;
1710         char *mptr = NULL;
1711         char *mpptr = NULL;
1712         char *hptr;
1713
1714         for (i = 0; i < NDiskFields; ++i) {
1715                 if (TheMessage->cm_fields[FieldOrder[i]]) {
1716                         mptr = mpptr = TheMessage->cm_fields[FieldOrder[i]];
1717                         switch (FieldOrder[i]) {
1718                         case eAuthor:
1719                                 safestrncpy(luser, mptr, sizeof_luser);
1720                                 safestrncpy(suser, mptr, sizeof_suser);
1721                                 break;
1722                         case eCarbonCopY:
1723                                 if ((flags & QP_EADDR) != 0) {
1724                                         mptr = qp_encode_email_addrs(mptr);
1725                                 }
1726                                 sanitize_truncated_recipient(mptr);
1727                                 cprintf("CC: %s%s", mptr, nl);
1728                                 break;
1729                         case eMessagePath:
1730                                 cprintf("Return-Path: %s%s", mptr, nl);
1731                                 break;
1732                         case eListID:
1733                                 cprintf("List-ID: %s%s", mptr, nl);
1734                                 break;
1735                         case eenVelopeTo:
1736                                 if ((flags & QP_EADDR) != 0) 
1737                                         mptr = qp_encode_email_addrs(mptr);
1738                                 hptr = mptr;
1739                                 while ((*hptr != '\0') && isspace(*hptr))
1740                                         hptr ++;
1741                                 if (!IsEmptyStr(hptr))
1742                                         cprintf("Envelope-To: %s%s", hptr, nl);
1743                                 break;
1744                         case eMsgSubject:
1745                                 cprintf("Subject: %s%s", mptr, nl);
1746                                 subject_found = 1;
1747                                 break;
1748                         case emessageId:
1749                                 safestrncpy(mid, mptr, sizeof_mid);
1750                                 break;
1751                         case erFc822Addr:
1752                                 safestrncpy(fuser, mptr, sizeof_fuser);
1753                                 break;
1754                         case eRecipient:
1755                                 if (haschar(mptr, '@') == 0) {
1756                                         sanitize_truncated_recipient(mptr);
1757                                         cprintf("To: %s@%s", mptr, CtdlGetConfigStr("c_fqdn"));
1758                                         cprintf("%s", nl);
1759                                 }
1760                                 else {
1761                                         if ((flags & QP_EADDR) != 0) {
1762                                                 mptr = qp_encode_email_addrs(mptr);
1763                                         }
1764                                         sanitize_truncated_recipient(mptr);
1765                                         cprintf("To: %s", mptr);
1766                                         cprintf("%s", nl);
1767                                 }
1768                                 break;
1769                         case eTimestamp:
1770                                 datestring(datestamp, sizeof datestamp, atol(mptr), DATESTRING_RFC822);
1771                                 cprintf("Date: %s%s", datestamp, nl);
1772                                 break;
1773                         case eWeferences:
1774                                 cprintf("References: ");
1775                                 k = num_tokens(mptr, '|');
1776                                 for (j=0; j<k; ++j) {
1777                                         extract_token(buf, mptr, j, '|', sizeof buf);
1778                                         cprintf("<%s>", buf);
1779                                         if (j == (k-1)) {
1780                                                 cprintf("%s", nl);
1781                                         }
1782                                         else {
1783                                                 cprintf(" ");
1784                                         }
1785                                 }
1786                                 break;
1787                         case eReplyTo:
1788                                 hptr = mptr;
1789                                 while ((*hptr != '\0') && isspace(*hptr))
1790                                         hptr ++;
1791                                 if (!IsEmptyStr(hptr))
1792                                         cprintf("Reply-To: %s%s", mptr, nl);
1793                                 break;
1794
1795                         case eExclusiveID:
1796                         case eJournal:
1797                         case eMesageText:
1798                         case eBig_message:
1799                         case eOriginalRoom:
1800                         case eErrorMsg:
1801                         case eSuppressIdx:
1802                         case eExtnotify:
1803                         case eVltMsgNum:
1804                                 /* these don't map to mime message headers. */
1805                                 break;
1806                         }
1807                         if (mptr != mpptr) {
1808                                 free (mptr);
1809                         }
1810                 }
1811         }
1812         if (subject_found == 0) {
1813                 cprintf("Subject: (no subject)%s", nl);
1814         }
1815 }
1816
1817
1818 void Dump_RFC822HeadersBody(
1819         struct CtdlMessage *TheMessage,
1820         int headers_only,       /* eschew the message body? */
1821         int flags,              /* should the bessage be exported clean? */
1822         const char *nl, int nlen)
1823 {
1824         cit_uint8_t prev_ch;
1825         int eoh = 0;
1826         const char *StartOfText = StrBufNOTNULL;
1827         char outbuf[1024];
1828         int outlen = 0;
1829         int nllen = strlen(nl);
1830         char *mptr;
1831         int lfSent = 0;
1832
1833         mptr = TheMessage->cm_fields[eMesageText];
1834
1835         prev_ch = '\0';
1836         while (*mptr != '\0') {
1837                 if (*mptr == '\r') {
1838                         /* do nothing */
1839                 }
1840                 else {
1841                         if ((!eoh) &&
1842                             (*mptr == '\n'))
1843                         {
1844                                 eoh = (*(mptr+1) == '\r') && (*(mptr+2) == '\n');
1845                                 if (!eoh)
1846                                         eoh = *(mptr+1) == '\n';
1847                                 if (eoh)
1848                                 {
1849                                         StartOfText = mptr;
1850                                         StartOfText = strchr(StartOfText, '\n');
1851                                         StartOfText = strchr(StartOfText, '\n');
1852                                 }
1853                         }
1854                         if (((headers_only == HEADERS_NONE) && (mptr >= StartOfText)) ||
1855                             ((headers_only == HEADERS_ONLY) && (mptr < StartOfText)) ||
1856                             ((headers_only != HEADERS_NONE) && 
1857                              (headers_only != HEADERS_ONLY))
1858                         ) {
1859                                 if (*mptr == '\n') {
1860                                         memcpy(&outbuf[outlen], nl, nllen);
1861                                         outlen += nllen;
1862                                         outbuf[outlen] = '\0';
1863                                 }
1864                                 else {
1865                                         outbuf[outlen++] = *mptr;
1866                                 }
1867                         }
1868                 }
1869                 if (flags & ESC_DOT) {
1870                         if ((prev_ch == '\n') && (*mptr == '.') && ((*(mptr+1) == '\r') || (*(mptr+1) == '\n'))) {
1871                                 outbuf[outlen++] = '.';
1872                         }
1873                         prev_ch = *mptr;
1874                 }
1875                 ++mptr;
1876                 if (outlen > 1000) {
1877                         if (client_write(outbuf, outlen) == -1) {
1878                                 syslog(LOG_ERR, "msgbase: Dump_RFC822HeadersBody() aborting due to write failure");
1879                                 return;
1880                         }
1881                         lfSent =  (outbuf[outlen - 1] == '\n');
1882                         outlen = 0;
1883                 }
1884         }
1885         if (outlen > 0) {
1886                 client_write(outbuf, outlen);
1887                 lfSent =  (outbuf[outlen - 1] == '\n');
1888         }
1889         if (!lfSent)
1890                 client_write(nl, nlen);
1891 }
1892
1893
1894 /* If the format type on disk is 1 (fixed-format), then we want
1895  * everything to be output completely literally ... regardless of
1896  * what message transfer format is in use.
1897  */
1898 void DumpFormatFixed(
1899         struct CtdlMessage *TheMessage,
1900         int mode,               /* how would you like that message? */
1901         const char *nl, int nllen)
1902 {
1903         cit_uint8_t ch;
1904         char buf[SIZ];
1905         int buflen;
1906         int xlline = 0;
1907         char *mptr;
1908
1909         mptr = TheMessage->cm_fields[eMesageText];
1910         
1911         if (mode == MT_MIME) {
1912                 cprintf("Content-type: text/plain\n\n");
1913         }
1914         *buf = '\0';
1915         buflen = 0;
1916         while (ch = *mptr++, ch > 0) {
1917                 if (ch == '\n')
1918                         ch = '\r';
1919
1920                 if ((buflen > 250) && (!xlline)){
1921                         int tbuflen;
1922                         tbuflen = buflen;
1923
1924                         while ((buflen > 0) && 
1925                                (!isspace(buf[buflen])))
1926                                 buflen --;
1927                         if (buflen == 0) {
1928                                 xlline = 1;
1929                         }
1930                         else {
1931                                 mptr -= tbuflen - buflen;
1932                                 buf[buflen] = '\0';
1933                                 ch = '\r';
1934                         }
1935                 }
1936
1937                 /* if we reach the outer bounds of our buffer, abort without respect for what we purge. */
1938                 if (xlline && ((isspace(ch)) || (buflen > SIZ - nllen - 2))) {
1939                         ch = '\r';
1940                 }
1941
1942                 if (ch == '\r') {
1943                         memcpy (&buf[buflen], nl, nllen);
1944                         buflen += nllen;
1945                         buf[buflen] = '\0';
1946
1947                         if (client_write(buf, buflen) == -1) {
1948                                 syslog(LOG_ERR, "msgbase: DumpFormatFixed() aborting due to write failure");
1949                                 return;
1950                         }
1951                         *buf = '\0';
1952                         buflen = 0;
1953                         xlline = 0;
1954                 } else {
1955                         buf[buflen] = ch;
1956                         buflen++;
1957                 }
1958         }
1959         buf[buflen] = '\0';
1960         if (!IsEmptyStr(buf)) {
1961                 cprintf("%s%s", buf, nl);
1962         }
1963 }
1964
1965
1966 /*
1967  * Get a message off disk.  (returns om_* values found in msgbase.h)
1968  */
1969 int CtdlOutputPreLoadedMsg(
1970                 struct CtdlMessage *TheMessage,
1971                 int mode,               /* how would you like that message? */
1972                 int headers_only,       /* eschew the message body? */
1973                 int do_proto,           /* do Citadel protocol responses? */
1974                 int crlf,               /* Use CRLF newlines instead of LF? */
1975                 int flags               /* should the bessage be exported clean? */
1976 ) {
1977         int i;
1978         const char *nl; /* newline string */
1979         int nlen;
1980         struct ma_info ma;
1981
1982         /* Buffers needed for RFC822 translation.  These are all filled
1983          * using functions that are bounds-checked, and therefore we can
1984          * make them substantially smaller than SIZ.
1985          */
1986         char suser[1024];
1987         char luser[1024];
1988         char fuser[1024];
1989         char snode[1024];
1990         char mid[1024];
1991
1992         syslog(LOG_DEBUG, "msgbase: CtdlOutputPreLoadedMsg(TheMessage=%s, %d, %d, %d, %d",
1993                    ((TheMessage == NULL) ? "NULL" : "not null"),
1994                    mode, headers_only, do_proto, crlf
1995         );
1996
1997         strcpy(mid, "unknown");
1998         nl = (crlf ? "\r\n" : "\n");
1999         nlen = crlf ? 2 : 1;
2000
2001         if (!CM_IsValidMsg(TheMessage)) {
2002                 syslog(LOG_ERR, "msgbase: error; invalid preloaded message for output");
2003                 return(om_no_such_msg);
2004         }
2005
2006         /* Suppress envelope recipients if required to avoid disclosing BCC addresses.
2007          * Pad it with spaces in order to avoid changing the RFC822 length of the message.
2008          */
2009         if ( (flags & SUPPRESS_ENV_TO) && (!CM_IsEmpty(TheMessage, eenVelopeTo)) ) {
2010                 memset(TheMessage->cm_fields[eenVelopeTo], ' ', TheMessage->cm_lengths[eenVelopeTo]);
2011         }
2012                 
2013         /* Are we downloading a MIME component? */
2014         if (mode == MT_DOWNLOAD) {
2015                 if (TheMessage->cm_format_type != FMT_RFC822) {
2016                         if (do_proto)
2017                                 cprintf("%d This is not a MIME message.\n",
2018                                 ERROR + ILLEGAL_VALUE);
2019                 } else if (CC->download_fp != NULL) {
2020                         if (do_proto) cprintf(
2021                                 "%d You already have a download open.\n",
2022                                 ERROR + RESOURCE_BUSY);
2023                 } else {
2024                         /* Parse the message text component */
2025                         mime_parser(CM_RANGE(TheMessage, eMesageText),
2026                                     *mime_download, NULL, NULL, NULL, 0);
2027                         /* If there's no file open by this time, the requested
2028                          * section wasn't found, so print an error
2029                          */
2030                         if (CC->download_fp == NULL) {
2031                                 if (do_proto) cprintf(
2032                                         "%d Section %s not found.\n",
2033                                         ERROR + FILE_NOT_FOUND,
2034                                         CC->download_desired_section);
2035                         }
2036                 }
2037                 return((CC->download_fp != NULL) ? om_ok : om_mime_error);
2038         }
2039
2040         /* MT_SPEW_SECTION is like MT_DOWNLOAD except it outputs the whole MIME part
2041          * in a single server operation instead of opening a download file.
2042          */
2043         if (mode == MT_SPEW_SECTION) {
2044                 if (TheMessage->cm_format_type != FMT_RFC822) {
2045                         if (do_proto)
2046                                 cprintf("%d This is not a MIME message.\n",
2047                                 ERROR + ILLEGAL_VALUE);
2048                 } else {
2049                         /* Parse the message text component */
2050                         int found_it = 0;
2051
2052                         mime_parser(CM_RANGE(TheMessage, eMesageText),
2053                                     *mime_spew_section, NULL, NULL, (void *)&found_it, 0);
2054                         /* If section wasn't found, print an error
2055                          */
2056                         if (!found_it) {
2057                                 if (do_proto) cprintf(
2058                                         "%d Section %s not found.\n",
2059                                         ERROR + FILE_NOT_FOUND,
2060                                         CC->download_desired_section);
2061                         }
2062                 }
2063                 return((CC->download_fp != NULL) ? om_ok : om_mime_error);
2064         }
2065
2066         /* now for the user-mode message reading loops */
2067         if (do_proto) cprintf("%d msg:\n", LISTING_FOLLOWS);
2068
2069         /* Does the caller want to skip the headers? */
2070         if (headers_only == HEADERS_NONE) goto START_TEXT;
2071
2072         /* Tell the client which format type we're using. */
2073         if ( (mode == MT_CITADEL) && (do_proto) ) {
2074                 cprintf("type=%d\n", TheMessage->cm_format_type);       // Tell the client which format type we're using.
2075         }
2076
2077         /* nhdr=yes means that we're only displaying headers, no body */
2078         if ( (TheMessage->cm_anon_type == MES_ANONONLY)
2079            && ((mode == MT_CITADEL) || (mode == MT_MIME))
2080            && (do_proto)
2081            ) {
2082                 cprintf("nhdr=yes\n");
2083         }
2084
2085         if ((mode == MT_CITADEL) || (mode == MT_MIME)) {
2086                 OutputCtdlMsgHeaders(TheMessage, do_proto);
2087         }
2088
2089         /* begin header processing loop for RFC822 transfer format */
2090         strcpy(suser, "");
2091         strcpy(luser, "");
2092         strcpy(fuser, "");
2093         strcpy(snode, "");
2094         if (mode == MT_RFC822) 
2095                 OutputRFC822MsgHeaders(
2096                         TheMessage,
2097                         flags,
2098                         nl, nlen,
2099                         mid, sizeof(mid),
2100                         suser, sizeof(suser),
2101                         luser, sizeof(luser),
2102                         fuser, sizeof(fuser),
2103                         snode, sizeof(snode)
2104                         );
2105
2106
2107         for (i=0; !IsEmptyStr(&suser[i]); ++i) {
2108                 suser[i] = tolower(suser[i]);
2109                 if (!isalnum(suser[i])) suser[i]='_';
2110         }
2111
2112         if (mode == MT_RFC822) {
2113                 /* Construct a fun message id */
2114                 cprintf("Message-ID: <%s", mid);
2115                 if (strchr(mid, '@')==NULL) {
2116                         cprintf("@%s", snode);
2117                 }
2118                 cprintf(">%s", nl);
2119
2120                 if (!is_room_aide() && (TheMessage->cm_anon_type == MES_ANONONLY)) {
2121                         cprintf("From: \"----\" <x@x.org>%s", nl);
2122                 }
2123                 else if (!is_room_aide() && (TheMessage->cm_anon_type == MES_ANONOPT)) {
2124                         cprintf("From: \"anonymous\" <x@x.org>%s", nl);
2125                 }
2126                 else if (!IsEmptyStr(fuser)) {
2127                         cprintf("From: \"%s\" <%s>%s", luser, fuser, nl);
2128                 }
2129                 else {
2130                         cprintf("From: \"%s\" <%s@%s>%s", luser, suser, snode, nl);
2131                 }
2132
2133                 /* Blank line signifying RFC822 end-of-headers */
2134                 if (TheMessage->cm_format_type != FMT_RFC822) {
2135                         cprintf("%s", nl);
2136                 }
2137         }
2138
2139         /* end header processing loop ... at this point, we're in the text */
2140 START_TEXT:
2141         if (headers_only == HEADERS_FAST) goto DONE;
2142
2143         /* Tell the client about the MIME parts in this message */
2144         if (TheMessage->cm_format_type == FMT_RFC822) {
2145                 if ( (mode == MT_CITADEL) || (mode == MT_MIME) ) {
2146                         memset(&ma, 0, sizeof(struct ma_info));
2147                         mime_parser(CM_RANGE(TheMessage, eMesageText),
2148                                 (do_proto ? *list_this_part : NULL),
2149                                 (do_proto ? *list_this_pref : NULL),
2150                                 (do_proto ? *list_this_suff : NULL),
2151                                 (void *)&ma, 1);
2152                 }
2153                 else if (mode == MT_RFC822) {   /* unparsed RFC822 dump */
2154                         Dump_RFC822HeadersBody(
2155                                 TheMessage,
2156                                 headers_only,
2157                                 flags,
2158                                 nl, nlen);
2159                         goto DONE;
2160                 }
2161         }
2162
2163         if (headers_only == HEADERS_ONLY) {
2164                 goto DONE;
2165         }
2166
2167         /* signify start of msg text */
2168         if ( (mode == MT_CITADEL) || (mode == MT_MIME) ) {
2169                 if (do_proto) cprintf("text\n");
2170         }
2171
2172         if (TheMessage->cm_format_type == FMT_FIXED) 
2173                 DumpFormatFixed(
2174                         TheMessage,
2175                         mode,           /* how would you like that message? */
2176                         nl, nlen);
2177
2178         /* If the message on disk is format 0 (Citadel vari-format), we
2179          * output using the formatter at 80 columns.  This is the final output
2180          * form if the transfer format is RFC822, but if the transfer format
2181          * is Citadel proprietary, it'll still work, because the indentation
2182          * for new paragraphs is correct and the client will reformat the
2183          * message to the reader's screen width.
2184          */
2185         if (TheMessage->cm_format_type == FMT_CITADEL) {
2186                 if (mode == MT_MIME) {
2187                         cprintf("Content-type: text/x-citadel-variformat\n\n");
2188                 }
2189                 memfmout(TheMessage->cm_fields[eMesageText], nl);
2190         }
2191
2192         /* If the message on disk is format 4 (MIME), we've gotta hand it
2193          * off to the MIME parser.  The client has already been told that
2194          * this message is format 1 (fixed format), so the callback function
2195          * we use will display those parts as-is.
2196          */
2197         if (TheMessage->cm_format_type == FMT_RFC822) {
2198                 memset(&ma, 0, sizeof(struct ma_info));
2199
2200                 if (mode == MT_MIME) {
2201                         ma.use_fo_hooks = 0;
2202                         strcpy(ma.chosen_part, "1");
2203                         ma.chosen_pref = 9999;
2204                         ma.dont_decode = CC->msg4_dont_decode;
2205                         mime_parser(CM_RANGE(TheMessage, eMesageText),
2206                                     *choose_preferred, *fixed_output_pre,
2207                                     *fixed_output_post, (void *)&ma, 1);
2208                         mime_parser(CM_RANGE(TheMessage, eMesageText),
2209                                     *output_preferred, NULL, NULL, (void *)&ma, 1);
2210                 }
2211                 else {
2212                         ma.use_fo_hooks = 1;
2213                         mime_parser(CM_RANGE(TheMessage, eMesageText),
2214                                     *fixed_output, *fixed_output_pre,
2215                                     *fixed_output_post, (void *)&ma, 0);
2216                 }
2217
2218         }
2219
2220 DONE:   /* now we're done */
2221         if (do_proto) cprintf("000\n");
2222         return(om_ok);
2223 }
2224
2225 /*
2226  * Save one or more message pointers into a specified room
2227  * (Returns 0 for success, nonzero for failure)
2228  * roomname may be NULL to use the current room
2229  *
2230  * Note that the 'supplied_msg' field may be set to NULL, in which case
2231  * the message will be fetched from disk, by number, if we need to perform
2232  * replication checks.  This adds an additional database read, so if the
2233  * caller already has the message in memory then it should be supplied.  (Obviously
2234  * this mode of operation only works if we're saving a single message.)
2235  */
2236 int CtdlSaveMsgPointersInRoom(char *roomname, long newmsgidlist[], int num_newmsgs,
2237                         int do_repl_check, struct CtdlMessage *supplied_msg, int suppress_refcount_adj
2238 ) {
2239         int i, j, unique;
2240         char hold_rm[ROOMNAMELEN];
2241         struct cdbdata *cdbfr;
2242         int num_msgs;
2243         long *msglist;
2244         long highest_msg = 0L;
2245
2246         long msgid = 0;
2247         struct CtdlMessage *msg = NULL;
2248
2249         long *msgs_to_be_merged = NULL;
2250         int num_msgs_to_be_merged = 0;
2251
2252         syslog(LOG_DEBUG,
2253                 "msgbase: CtdlSaveMsgPointersInRoom(room=%s, num_msgs=%d, repl=%d, suppress_rca=%d)",
2254                 roomname, num_newmsgs, do_repl_check, suppress_refcount_adj
2255         );
2256
2257         strcpy(hold_rm, CC->room.QRname);
2258
2259         /* Sanity checks */
2260         if (newmsgidlist == NULL) return(ERROR + INTERNAL_ERROR);
2261         if (num_newmsgs < 1) return(ERROR + INTERNAL_ERROR);
2262         if (num_newmsgs > 1) supplied_msg = NULL;
2263
2264         /* Now the regular stuff */
2265         if (CtdlGetRoomLock(&CC->room,
2266            ((roomname != NULL) ? roomname : CC->room.QRname) )
2267            != 0) {
2268                 syslog(LOG_ERR, "msgbase: no such room <%s>", roomname);
2269                 return(ERROR + ROOM_NOT_FOUND);
2270         }
2271
2272
2273         msgs_to_be_merged = malloc(sizeof(long) * num_newmsgs);
2274         num_msgs_to_be_merged = 0;
2275
2276
2277         cdbfr = cdb_fetch(CDB_MSGLISTS, &CC->room.QRnumber, sizeof(long));
2278         if (cdbfr == NULL) {
2279                 msglist = NULL;
2280                 num_msgs = 0;
2281         } else {
2282                 msglist = (long *) cdbfr->ptr;
2283                 cdbfr->ptr = NULL;      /* CtdlSaveMsgPointerInRoom() now owns this memory */
2284                 num_msgs = cdbfr->len / sizeof(long);
2285                 cdb_free(cdbfr);
2286         }
2287
2288
2289         /* Create a list of msgid's which were supplied by the caller, but do
2290          * not already exist in the target room.  It is absolutely taboo to
2291          * have more than one reference to the same message in a room.
2292          */
2293         for (i=0; i<num_newmsgs; ++i) {
2294                 unique = 1;
2295                 if (num_msgs > 0) for (j=0; j<num_msgs; ++j) {
2296                         if (msglist[j] == newmsgidlist[i]) {
2297                                 unique = 0;
2298                         }
2299                 }
2300                 if (unique) {
2301                         msgs_to_be_merged[num_msgs_to_be_merged++] = newmsgidlist[i];
2302                 }
2303         }
2304
2305         syslog(LOG_DEBUG, "msgbase: %d unique messages to be merged", num_msgs_to_be_merged);
2306
2307         /*
2308          * Now merge the new messages
2309          */
2310         msglist = realloc(msglist, (sizeof(long) * (num_msgs + num_msgs_to_be_merged)) );
2311         if (msglist == NULL) {
2312                 syslog(LOG_ALERT, "msgbase: ERROR; can't realloc message list!");
2313                 free(msgs_to_be_merged);
2314                 return (ERROR + INTERNAL_ERROR);
2315         }
2316         memcpy(&msglist[num_msgs], msgs_to_be_merged, (sizeof(long) * num_msgs_to_be_merged) );
2317         num_msgs += num_msgs_to_be_merged;
2318
2319         /* Sort the message list, so all the msgid's are in order */
2320         num_msgs = sort_msglist(msglist, num_msgs);
2321
2322         /* Determine the highest message number */
2323         highest_msg = msglist[num_msgs - 1];
2324
2325         /* Write it back to disk. */
2326         cdb_store(CDB_MSGLISTS, &CC->room.QRnumber, (int)sizeof(long),
2327                   msglist, (int)(num_msgs * sizeof(long)));
2328
2329         /* Free up the memory we used. */
2330         free(msglist);
2331
2332         /* Update the highest-message pointer and unlock the room. */
2333         CC->room.QRhighest = highest_msg;
2334         CtdlPutRoomLock(&CC->room);
2335
2336         /* Perform replication checks if necessary */
2337         if ( (DoesThisRoomNeedEuidIndexing(&CC->room)) && (do_repl_check) ) {
2338                 syslog(LOG_DEBUG, "msgbase: CtdlSaveMsgPointerInRoom() doing repl checks");
2339
2340                 for (i=0; i<num_msgs_to_be_merged; ++i) {
2341                         msgid = msgs_to_be_merged[i];
2342         
2343                         if (supplied_msg != NULL) {
2344                                 msg = supplied_msg;
2345                         }
2346                         else {
2347                                 msg = CtdlFetchMessage(msgid, 0);
2348                         }
2349         
2350                         if (msg != NULL) {
2351                                 ReplicationChecks(msg);
2352                 
2353                                 /* If the message has an Exclusive ID, index that... */
2354                                 if (!CM_IsEmpty(msg, eExclusiveID)) {
2355                                         index_message_by_euid(msg->cm_fields[eExclusiveID], &CC->room, msgid);
2356                                 }
2357
2358                                 /* Free up the memory we may have allocated */
2359                                 if (msg != supplied_msg) {
2360                                         CM_Free(msg);
2361                                 }
2362                         }
2363         
2364                 }
2365         }
2366
2367         else {
2368                 syslog(LOG_DEBUG, "msgbase: CtdlSaveMsgPointerInRoom() skips repl checks");
2369         }
2370
2371         /* Submit this room for processing by hooks */
2372         int total_roomhook_errors = PerformRoomHooks(&CC->room);
2373         if (total_roomhook_errors) {
2374                 syslog(LOG_WARNING, "msgbase: room hooks returned %d errors", total_roomhook_errors);
2375         }
2376
2377         /* Go back to the room we were in before we wandered here... */
2378         CtdlGetRoom(&CC->room, hold_rm);
2379
2380         /* Bump the reference count for all messages which were merged */
2381         if (!suppress_refcount_adj) {
2382                 AdjRefCountList(msgs_to_be_merged, num_msgs_to_be_merged, +1);
2383         }
2384
2385         /* Free up memory... */
2386         if (msgs_to_be_merged != NULL) {
2387                 free(msgs_to_be_merged);
2388         }
2389
2390         /* Return success. */
2391         return (0);
2392 }
2393
2394
2395 /*
2396  * This is the same as CtdlSaveMsgPointersInRoom() but it only accepts
2397  * a single message.
2398  */
2399 int CtdlSaveMsgPointerInRoom(char *roomname, long msgid,
2400                              int do_repl_check, struct CtdlMessage *supplied_msg)
2401 {
2402         return CtdlSaveMsgPointersInRoom(roomname, &msgid, 1, do_repl_check, supplied_msg, 0);
2403 }
2404
2405
2406 /*
2407  * Message base operation to save a new message to the message store
2408  * (returns new message number)
2409  *
2410  * This is the back end for CtdlSubmitMsg() and should not be directly
2411  * called by server-side modules.
2412  *
2413  */
2414 long CtdlSaveThisMessage(struct CtdlMessage *msg, long msgid, int Reply) {
2415         long retval;
2416         struct ser_ret smr;
2417         int is_bigmsg = 0;
2418         char *holdM = NULL;
2419         long holdMLen = 0;
2420
2421         /*
2422          * If the message is big, set its body aside for storage elsewhere
2423          * and we hide the message body from the serializer
2424          */
2425         if (!CM_IsEmpty(msg, eMesageText) && msg->cm_lengths[eMesageText] > BIGMSG) {
2426                 is_bigmsg = 1;
2427                 holdM = msg->cm_fields[eMesageText];
2428                 msg->cm_fields[eMesageText] = NULL;
2429                 holdMLen = msg->cm_lengths[eMesageText];
2430                 msg->cm_lengths[eMesageText] = 0;
2431         }
2432
2433         /* Serialize our data structure for storage in the database */  
2434         CtdlSerializeMessage(&smr, msg);
2435
2436         if (is_bigmsg) {
2437                 /* put the message body back into the message */
2438                 msg->cm_fields[eMesageText] = holdM;
2439                 msg->cm_lengths[eMesageText] = holdMLen;
2440         }
2441
2442         if (smr.len == 0) {
2443                 if (Reply) {
2444                         cprintf("%d Unable to serialize message\n",
2445                                 ERROR + INTERNAL_ERROR);
2446                 }
2447                 else {
2448                         syslog(LOG_ERR, "msgbase: CtdlSaveMessage() unable to serialize message");
2449
2450                 }
2451                 return (-1L);
2452         }
2453
2454         /* Write our little bundle of joy into the message base */
2455         retval = cdb_store(CDB_MSGMAIN, &msgid, (int)sizeof(long), smr.ser, smr.len);
2456         if (retval < 0) {
2457                 syslog(LOG_ERR, "msgbase: can't store message %ld: %ld", msgid, retval);
2458         }
2459         else {
2460                 if (is_bigmsg) {
2461                         retval = cdb_store(CDB_BIGMSGS,
2462                                            &msgid,
2463                                            (int)sizeof(long),
2464                                            holdM,
2465                                            (holdMLen + 1)
2466                                 );
2467                         if (retval < 0) {
2468                                 syslog(LOG_ERR, "msgbase: failed to store message body for msgid %ld: %ld", msgid, retval);
2469                         }
2470                 }
2471         }
2472
2473         /* Free the memory we used for the serialized message */
2474         free(smr.ser);
2475
2476         return(retval);
2477 }
2478
2479
2480 long send_message(struct CtdlMessage *msg) {
2481         long newmsgid;
2482         long retval;
2483         char msgidbuf[256];
2484         long msgidbuflen;
2485
2486         /* Get a new message number */
2487         newmsgid = get_new_message_number();
2488
2489         /* Generate an ID if we don't have one already */
2490         if (CM_IsEmpty(msg, emessageId)) {
2491                 msgidbuflen = snprintf(msgidbuf, sizeof msgidbuf, "%08lX-%08lX@%s",
2492                                        (long unsigned int) time(NULL),
2493                                        (long unsigned int) newmsgid,
2494                                        CtdlGetConfigStr("c_fqdn")
2495                         );
2496
2497                 CM_SetField(msg, emessageId, msgidbuf, msgidbuflen);
2498         }
2499
2500         retval = CtdlSaveThisMessage(msg, newmsgid, 1);
2501
2502         if (retval == 0) {
2503                 retval = newmsgid;
2504         }
2505
2506         /* Return the *local* message ID to the caller
2507          * (even if we're storing an incoming network message)
2508          */
2509         return(retval);
2510 }
2511
2512
2513 /*
2514  * Serialize a struct CtdlMessage into the format used on disk.
2515  * 
2516  * This function loads up a "struct ser_ret" (defined in server.h) which
2517  * contains the length of the serialized message and a pointer to the
2518  * serialized message in memory.  THE LATTER MUST BE FREED BY THE CALLER.
2519  */
2520 void CtdlSerializeMessage(struct ser_ret *ret,          /* return values */
2521                           struct CtdlMessage *msg)      /* unserialized msg */
2522 {
2523         size_t wlen;
2524         int i;
2525
2526         /*
2527          * Check for valid message format
2528          */
2529         if (CM_IsValidMsg(msg) == 0) {
2530                 syslog(LOG_ERR, "msgbase: CtdlSerializeMessage() aborting due to invalid message");
2531                 ret->len = 0;
2532                 ret->ser = NULL;
2533                 return;
2534         }
2535
2536         ret->len = 3;
2537         for (i=0; i < NDiskFields; ++i)
2538                 if (msg->cm_fields[FieldOrder[i]] != NULL)
2539                         ret->len += msg->cm_lengths[FieldOrder[i]] + 2;
2540
2541         ret->ser = malloc(ret->len);
2542         if (ret->ser == NULL) {
2543                 syslog(LOG_ERR, "msgbase: CtdlSerializeMessage() malloc(%ld) failed: %m", (long)ret->len);
2544                 ret->len = 0;
2545                 ret->ser = NULL;
2546                 return;
2547         }
2548
2549         ret->ser[0] = 0xFF;
2550         ret->ser[1] = msg->cm_anon_type;
2551         ret->ser[2] = msg->cm_format_type;
2552         wlen = 3;
2553
2554         for (i=0; i < NDiskFields; ++i) {
2555                 if (msg->cm_fields[FieldOrder[i]] != NULL) {
2556                         ret->ser[wlen++] = (char)FieldOrder[i];
2557
2558                         memcpy(&ret->ser[wlen],
2559                                msg->cm_fields[FieldOrder[i]],
2560                                msg->cm_lengths[FieldOrder[i]] + 1);
2561
2562                         wlen = wlen + msg->cm_lengths[FieldOrder[i]] + 1;
2563                 }
2564         }
2565
2566         if (ret->len != wlen) {
2567                 syslog(LOG_ERR, "msgbase: ERROR; len=%ld wlen=%ld", (long)ret->len, (long)wlen);
2568         }
2569
2570         return;
2571 }
2572
2573
2574 /*
2575  * Check to see if any messages already exist in the current room which
2576  * carry the same Exclusive ID as this one.  If any are found, delete them.
2577  */
2578 void ReplicationChecks(struct CtdlMessage *msg) {
2579         long old_msgnum = (-1L);
2580
2581         if (DoesThisRoomNeedEuidIndexing(&CC->room) == 0) return;
2582
2583         syslog(LOG_DEBUG, "msgbase: performing replication checks in <%s>", CC->room.QRname);
2584
2585         /* No exclusive id?  Don't do anything. */
2586         if (msg == NULL) return;
2587         if (CM_IsEmpty(msg, eExclusiveID)) return;
2588
2589         /*syslog(LOG_DEBUG, "msgbase: exclusive ID: <%s> for room <%s>",
2590           msg->cm_fields[eExclusiveID], CC->room.QRname);*/
2591
2592         old_msgnum = CtdlLocateMessageByEuid(msg->cm_fields[eExclusiveID], &CC->room);
2593         if (old_msgnum > 0L) {
2594                 syslog(LOG_DEBUG, "msgbase: ReplicationChecks() replacing message %ld", old_msgnum);
2595                 CtdlDeleteMessages(CC->room.QRname, &old_msgnum, 1, "");
2596         }
2597 }
2598
2599
2600 /*
2601  * Save a message to disk and submit it into the delivery system.
2602  */
2603 long CtdlSubmitMsg(struct CtdlMessage *msg,     /* message to save */
2604                    struct recptypes *recps,     /* recipients (if mail) */
2605                    const char *force            /* force a particular room? */
2606 ) {
2607         char hold_rm[ROOMNAMELEN];
2608         char actual_rm[ROOMNAMELEN];
2609         char force_room[ROOMNAMELEN];
2610         char content_type[SIZ];                 /* We have to learn this */
2611         char recipient[SIZ];
2612         char bounce_to[1024];
2613         const char *room;
2614         long newmsgid;
2615         const char *mptr = NULL;
2616         struct ctdluser userbuf;
2617         int a, i;
2618         struct MetaData smi;
2619         char *collected_addresses = NULL;
2620         struct addresses_to_be_filed *aptr = NULL;
2621         StrBuf *saved_rfc822_version = NULL;
2622         int qualified_for_journaling = 0;
2623
2624         syslog(LOG_DEBUG, "msgbase: CtdlSubmitMsg() called");
2625         if (CM_IsValidMsg(msg) == 0) return(-1);        /* self check */
2626
2627         /* If this message has no timestamp, we take the liberty of
2628          * giving it one, right now.
2629          */
2630         if (CM_IsEmpty(msg, eTimestamp)) {
2631                 CM_SetFieldLONG(msg, eTimestamp, time(NULL));
2632         }
2633
2634         /* If this message has no path, we generate one.
2635          */
2636         if (CM_IsEmpty(msg, eMessagePath)) {
2637                 if (!CM_IsEmpty(msg, eAuthor)) {
2638                         CM_CopyField(msg, eMessagePath, eAuthor);
2639                         for (a=0; !IsEmptyStr(&msg->cm_fields[eMessagePath][a]); ++a) {
2640                                 if (isspace(msg->cm_fields[eMessagePath][a])) {
2641                                         msg->cm_fields[eMessagePath][a] = ' ';
2642                                 }
2643                         }
2644                 }
2645                 else {
2646                         CM_SetField(msg, eMessagePath, HKEY("unknown"));
2647                 }
2648         }
2649
2650         if (force == NULL) {
2651                 force_room[0] = '\0';
2652         }
2653         else {
2654                 strcpy(force_room, force);
2655         }
2656
2657         /* Learn about what's inside, because it's what's inside that counts */
2658         if (CM_IsEmpty(msg, eMesageText)) {
2659                 syslog(LOG_ERR, "msgbase: ERROR; attempt to save message with NULL body");
2660                 return(-2);
2661         }
2662
2663         switch (msg->cm_format_type) {
2664         case 0:
2665                 strcpy(content_type, "text/x-citadel-variformat");
2666                 break;
2667         case 1:
2668                 strcpy(content_type, "text/plain");
2669                 break;
2670         case 4:
2671                 strcpy(content_type, "text/plain");
2672                 mptr = bmstrcasestr(msg->cm_fields[eMesageText], "Content-type:");
2673                 if (mptr != NULL) {
2674                         char *aptr;
2675                         safestrncpy(content_type, &mptr[13], sizeof content_type);
2676                         striplt(content_type);
2677                         aptr = content_type;
2678                         while (!IsEmptyStr(aptr)) {
2679                                 if ((*aptr == ';')
2680                                     || (*aptr == ' ')
2681                                     || (*aptr == 13)
2682                                     || (*aptr == 10)) {
2683                                         *aptr = 0;
2684                                 }
2685                                 else aptr++;
2686                         }
2687                 }
2688         }
2689
2690         /* Goto the correct room */
2691         room = (recps) ? CC->room.QRname : SENTITEMS;
2692         syslog(LOG_DEBUG, "msgbase: selected room %s", room);
2693         strcpy(hold_rm, CC->room.QRname);
2694         strcpy(actual_rm, CC->room.QRname);
2695         if (recps != NULL) {
2696                 strcpy(actual_rm, SENTITEMS);
2697         }
2698
2699         /* If the user is a twit, move to the twit room for posting */
2700         if (TWITDETECT) {
2701                 if (CC->user.axlevel == AxProbU) {
2702                         strcpy(hold_rm, actual_rm);
2703                         strcpy(actual_rm, CtdlGetConfigStr("c_twitroom"));
2704                         syslog(LOG_DEBUG, "msgbase: diverting to twit room");
2705                 }
2706         }
2707
2708         /* ...or if this message is destined for Aide> then go there. */
2709         if (!IsEmptyStr(force_room)) {
2710                 strcpy(actual_rm, force_room);
2711         }
2712
2713         syslog(LOG_DEBUG, "msgbase: final selection: %s (%s)", actual_rm, room);
2714         if (strcasecmp(actual_rm, CC->room.QRname)) {
2715                 /* CtdlGetRoom(&CC->room, actual_rm); */
2716                 CtdlUserGoto(actual_rm, 0, 1, NULL, NULL, NULL, NULL);
2717         }
2718
2719         /*
2720          * If this message has no O (room) field, generate one.
2721          */
2722         if (CM_IsEmpty(msg, eOriginalRoom) && !IsEmptyStr(CC->room.QRname)) {
2723                 CM_SetField(msg, eOriginalRoom, CC->room.QRname, -1);
2724         }
2725
2726         /* Perform "before save" hooks (aborting if any return nonzero) */
2727         syslog(LOG_DEBUG, "msgbase: performing before-save hooks");
2728         if (PerformMessageHooks(msg, recps, EVT_BEFORESAVE) > 0) return(-3);
2729
2730         /*
2731          * If this message has an Exclusive ID, and the room is replication
2732          * checking enabled, then do replication checks.
2733          */
2734         if (DoesThisRoomNeedEuidIndexing(&CC->room)) {
2735                 ReplicationChecks(msg);
2736         }
2737
2738         /* Save it to disk */
2739         syslog(LOG_DEBUG, "msgbase: saving to disk");
2740         newmsgid = send_message(msg);
2741         if (newmsgid <= 0L) return(-5);
2742
2743         /* Write a supplemental message info record.  This doesn't have to
2744          * be a critical section because nobody else knows about this message
2745          * yet.
2746          */
2747         syslog(LOG_DEBUG, "msgbase: creating metadata record");
2748         memset(&smi, 0, sizeof(struct MetaData));
2749         smi.meta_msgnum = newmsgid;
2750         smi.meta_refcount = 0;
2751         safestrncpy(smi.meta_content_type, content_type, sizeof smi.meta_content_type);
2752
2753         /*
2754          * Measure how big this message will be when rendered as RFC822.
2755          * We do this for two reasons:
2756          * 1. We need the RFC822 length for the new metadata record, so the
2757          *    POP and IMAP services don't have to calculate message lengths
2758          *    while the user is waiting (multiplied by potentially hundreds
2759          *    or thousands of messages).
2760          * 2. If journaling is enabled, we will need an RFC822 version of the
2761          *    message to attach to the journalized copy.
2762          */
2763         if (CC->redirect_buffer != NULL) {
2764                 syslog(LOG_ALERT, "msgbase: CC->redirect_buffer is not NULL during message submission!");
2765                 abort();
2766         }
2767         CC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
2768         CtdlOutputPreLoadedMsg(msg, MT_RFC822, HEADERS_ALL, 0, 1, QP_EADDR);
2769         smi.meta_rfc822_length = StrLength(CC->redirect_buffer);
2770         saved_rfc822_version = CC->redirect_buffer;
2771         CC->redirect_buffer = NULL;
2772
2773         PutMetaData(&smi);
2774
2775         /* Now figure out where to store the pointers */
2776         syslog(LOG_DEBUG, "msgbase: storing pointers");
2777
2778         /* If this is being done by the networker delivering a private
2779          * message, we want to BYPASS saving the sender's copy (because there
2780          * is no local sender; it would otherwise go to the Trashcan).
2781          */
2782         if ((!CC->internal_pgm) || (recps == NULL)) {
2783                 if (CtdlSaveMsgPointerInRoom(actual_rm, newmsgid, 1, msg) != 0) {
2784                         syslog(LOG_ERR, "msgbase: ERROR saving message pointer %ld in %s", newmsgid, actual_rm);
2785                         CtdlSaveMsgPointerInRoom(CtdlGetConfigStr("c_aideroom"), newmsgid, 0, msg);
2786                 }
2787         }
2788
2789         /* For internet mail, drop a copy in the outbound queue room */
2790         if ((recps != NULL) && (recps->num_internet > 0)) {
2791                 CtdlSaveMsgPointerInRoom(SMTP_SPOOLOUT_ROOM, newmsgid, 0, msg);
2792         }
2793
2794         /* If other rooms are specified, drop them there too. */
2795         if ((recps != NULL) && (recps->num_room > 0)) {
2796                 for (i=0; i<num_tokens(recps->recp_room, '|'); ++i) {
2797                         extract_token(recipient, recps->recp_room, i, '|', sizeof recipient);
2798                         syslog(LOG_DEBUG, "msgbase: delivering to room <%s>", recipient);
2799                         CtdlSaveMsgPointerInRoom(recipient, newmsgid, 0, msg);
2800                 }
2801         }
2802
2803         /* Bump this user's messages posted counter. */
2804         syslog(LOG_DEBUG, "msgbase: updating user");
2805         CtdlLockGetCurrentUser();
2806         CC->user.posted = CC->user.posted + 1;
2807         CtdlPutCurrentUserLock();
2808
2809         /* Decide where bounces need to be delivered */
2810         if ((recps != NULL) && (recps->bounce_to == NULL)) {
2811                 if (CC->logged_in) {
2812                         strcpy(bounce_to, CC->user.fullname);
2813                 }
2814                 else if (!IsEmptyStr(msg->cm_fields[eAuthor])){
2815                         strcpy(bounce_to, msg->cm_fields[eAuthor]);
2816                 }
2817                 recps->bounce_to = bounce_to;
2818         }
2819                 
2820         CM_SetFieldLONG(msg, eVltMsgNum, newmsgid);
2821
2822         /* If this is private, local mail, make a copy in the
2823          * recipient's mailbox and bump the reference count.
2824          */
2825         if ((recps != NULL) && (recps->num_local > 0)) {
2826                 char *pch;
2827                 int ntokens;
2828
2829                 pch = recps->recp_local;
2830                 recps->recp_local = recipient;
2831                 ntokens = num_tokens(pch, '|');
2832                 for (i=0; i<ntokens; ++i) {
2833                         extract_token(recipient, pch, i, '|', sizeof recipient);
2834                         syslog(LOG_DEBUG, "msgbase: delivering private local mail to <%s>", recipient);
2835                         if (CtdlGetUser(&userbuf, recipient) == 0) {
2836                                 CtdlMailboxName(actual_rm, sizeof actual_rm, &userbuf, MAILROOM);
2837                                 CtdlSaveMsgPointerInRoom(actual_rm, newmsgid, 0, msg);
2838                                 CtdlBumpNewMailCounter(userbuf.usernum);
2839                                 PerformMessageHooks(msg, recps, EVT_AFTERUSRMBOXSAVE);
2840                         }
2841                         else {
2842                                 syslog(LOG_DEBUG, "msgbase: no user <%s>", recipient);
2843                                 CtdlSaveMsgPointerInRoom(CtdlGetConfigStr("c_aideroom"), newmsgid, 0, msg);
2844                         }
2845                 }
2846                 recps->recp_local = pch;
2847         }
2848
2849         /* Perform "after save" hooks */
2850         syslog(LOG_DEBUG, "msgbase: performing after-save hooks");
2851
2852         PerformMessageHooks(msg, recps, EVT_AFTERSAVE);
2853         CM_FlushField(msg, eVltMsgNum);
2854
2855         /* Go back to the room we started from */
2856         syslog(LOG_DEBUG, "msgbase: returning to original room %s", hold_rm);
2857         if (strcasecmp(hold_rm, CC->room.QRname)) {
2858                 CtdlUserGoto(hold_rm, 0, 1, NULL, NULL, NULL, NULL);
2859         }
2860
2861         /*
2862          * Any addresses to harvest for someone's address book?
2863          */
2864         if ( (CC->logged_in) && (recps != NULL) ) {
2865                 collected_addresses = harvest_collected_addresses(msg);
2866         }
2867
2868         if (collected_addresses != NULL) {
2869                 aptr = (struct addresses_to_be_filed *) malloc(sizeof(struct addresses_to_be_filed));
2870                 CtdlMailboxName(actual_rm, sizeof actual_rm, &CC->user, USERCONTACTSROOM);
2871                 aptr->roomname = strdup(actual_rm);
2872                 aptr->collected_addresses = collected_addresses;
2873                 begin_critical_section(S_ATBF);
2874                 aptr->next = atbf;
2875                 atbf = aptr;
2876                 end_critical_section(S_ATBF);
2877         }
2878
2879         /*
2880          * Determine whether this message qualifies for journaling.
2881          */
2882         if (!CM_IsEmpty(msg, eJournal)) {
2883                 qualified_for_journaling = 0;
2884         }
2885         else {
2886                 if (recps == NULL) {
2887                         qualified_for_journaling = CtdlGetConfigInt("c_journal_pubmsgs");
2888                 }
2889                 else if (recps->num_local + recps->num_ignet + recps->num_internet > 0) {
2890                         qualified_for_journaling = CtdlGetConfigInt("c_journal_email");
2891                 }
2892                 else {
2893                         qualified_for_journaling = CtdlGetConfigInt("c_journal_pubmsgs");
2894                 }
2895         }
2896
2897         /*
2898          * Do we have to perform journaling?  If so, hand off the saved
2899          * RFC822 version will be handed off to the journaler for background
2900          * submit.  Otherwise, we have to free the memory ourselves.
2901          */
2902         if (saved_rfc822_version != NULL) {
2903                 if (qualified_for_journaling) {
2904                         JournalBackgroundSubmit(msg, saved_rfc822_version, recps);
2905                 }
2906                 else {
2907                         FreeStrBuf(&saved_rfc822_version);
2908                 }
2909         }
2910
2911         if ((recps != NULL) && (recps->bounce_to == bounce_to))
2912                 recps->bounce_to = NULL;
2913
2914         /* Done. */
2915         return(newmsgid);
2916 }
2917
2918
2919 /*
2920  * Convenience function for generating small administrative messages.
2921  */
2922 long quickie_message(const char *from,
2923                      const char *fromaddr,
2924                      const char *to,
2925                      char *room,
2926                      const char *text, 
2927                      int format_type,
2928                      const char *subject)
2929 {
2930         struct CtdlMessage *msg;
2931         struct recptypes *recp = NULL;
2932
2933         msg = malloc(sizeof(struct CtdlMessage));
2934         memset(msg, 0, sizeof(struct CtdlMessage));
2935         msg->cm_magic = CTDLMESSAGE_MAGIC;
2936         msg->cm_anon_type = MES_NORMAL;
2937         msg->cm_format_type = format_type;
2938
2939         if (!IsEmptyStr(from)) {
2940                 CM_SetField(msg, eAuthor, from, -1);
2941         }
2942         else if (!IsEmptyStr(fromaddr)) {
2943                 char *pAt;
2944                 CM_SetField(msg, eAuthor, fromaddr, -1);
2945                 pAt = strchr(msg->cm_fields[eAuthor], '@');
2946                 if (pAt != NULL) {
2947                         CM_CutFieldAt(msg, eAuthor, pAt - msg->cm_fields[eAuthor]);
2948                 }
2949         }
2950         else {
2951                 msg->cm_fields[eAuthor] = strdup("Citadel");
2952         }
2953
2954         if (!IsEmptyStr(fromaddr)) CM_SetField(msg, erFc822Addr, fromaddr, -1);
2955         if (!IsEmptyStr(room)) CM_SetField(msg, eOriginalRoom, room, -1);
2956         if (!IsEmptyStr(to)) {
2957                 CM_SetField(msg, eRecipient, to, -1);
2958                 recp = validate_recipients(to, NULL, 0);
2959         }
2960         if (!IsEmptyStr(subject)) {
2961                 CM_SetField(msg, eMsgSubject, subject, -1);
2962         }
2963         if (!IsEmptyStr(text)) {
2964                 CM_SetField(msg, eMesageText, text, -1);
2965         }
2966
2967         long msgnum = CtdlSubmitMsg(msg, recp, room);
2968         CM_Free(msg);
2969         if (recp != NULL) free_recipients(recp);
2970         return msgnum;
2971 }
2972
2973
2974 /*
2975  * Back end function used by CtdlMakeMessage() and similar functions
2976  */
2977 StrBuf *CtdlReadMessageBodyBuf(char *terminator,        /* token signalling EOT */
2978                                long tlen,
2979                                size_t maxlen,           /* maximum message length */
2980                                StrBuf *exist,           /* if non-null, append to it;
2981                                                            exist is ALWAYS freed  */
2982                                int crlf                 /* CRLF newlines instead of LF */
2983 ) {
2984         StrBuf *Message;
2985         StrBuf *LineBuf;
2986         int flushing = 0;
2987         int finished = 0;
2988         int dotdot = 0;
2989
2990         LineBuf = NewStrBufPlain(NULL, SIZ);
2991         if (exist == NULL) {
2992                 Message = NewStrBufPlain(NULL, 4 * SIZ);
2993         }
2994         else {
2995                 Message = NewStrBufDup(exist);
2996         }
2997
2998         /* Do we need to change leading ".." to "." for SMTP escaping? */
2999         if ((tlen == 1) && (*terminator == '.')) {
3000                 dotdot = 1;
3001         }
3002
3003         /* read in the lines of message text one by one */
3004         do {
3005                 if (CtdlClientGetLine(LineBuf) < 0) {
3006                         finished = 1;
3007                 }
3008                 if ((StrLength(LineBuf) == tlen) && (!strcmp(ChrPtr(LineBuf), terminator))) {
3009                         finished = 1;
3010                 }
3011                 if ( (!flushing) && (!finished) ) {
3012                         if (crlf) {
3013                                 StrBufAppendBufPlain(LineBuf, HKEY("\r\n"), 0);
3014                         }
3015                         else {
3016                                 StrBufAppendBufPlain(LineBuf, HKEY("\n"), 0);
3017                         }
3018                         
3019                         /* Unescape SMTP-style input of two dots at the beginning of the line */
3020                         if ((dotdot) && (StrLength(LineBuf) > 1) && (ChrPtr(LineBuf)[0] == '.')) {
3021                                 StrBufCutLeft(LineBuf, 1);
3022                         }
3023                         StrBufAppendBuf(Message, LineBuf, 0);
3024                 }
3025
3026                 /* if we've hit the max msg length, flush the rest */
3027                 if (StrLength(Message) >= maxlen) flushing = 1;
3028
3029         } while (!finished);
3030         FreeStrBuf(&LineBuf);
3031         return Message;
3032 }
3033
3034
3035 /*
3036  * Back end function used by CtdlMakeMessage() and similar functions
3037  */
3038 char *CtdlReadMessageBody(char *terminator,     /* token signalling EOT */
3039                           long tlen,
3040                           size_t maxlen,                /* maximum message length */
3041                           StrBuf *exist,                /* if non-null, append to it;
3042                                                    exist is ALWAYS freed  */
3043                           int crlf              /* CRLF newlines instead of LF */
3044         ) 
3045 {
3046         StrBuf *Message;
3047
3048         Message = CtdlReadMessageBodyBuf(terminator,
3049                                          tlen,
3050                                          maxlen,
3051                                          exist,
3052                                          crlf
3053         );
3054         if (Message == NULL)
3055                 return NULL;
3056         else
3057                 return SmashStrBuf(&Message);
3058 }
3059
3060
3061 struct CtdlMessage *CtdlMakeMessage(
3062         struct ctdluser *author,        /* author's user structure */
3063         char *recipient,                /* NULL if it's not mail */
3064         char *recp_cc,                  /* NULL if it's not mail */
3065         char *room,                     /* room where it's going */
3066         int type,                       /* see MES_ types in header file */
3067         int format_type,                /* variformat, plain text, MIME... */
3068         char *fake_name,                /* who we're masquerading as */
3069         char *my_email,                 /* which of my email addresses to use (empty is ok) */
3070         char *subject,                  /* Subject (optional) */
3071         char *supplied_euid,            /* ...or NULL if this is irrelevant */
3072         char *preformatted_text,        /* ...or NULL to read text from client */
3073         char *references                /* Thread references */
3074 ) {
3075         return CtdlMakeMessageLen(
3076                 author, /* author's user structure */
3077                 recipient,              /* NULL if it's not mail */
3078                 (recipient)?strlen(recipient) : 0,
3079                 recp_cc,                        /* NULL if it's not mail */
3080                 (recp_cc)?strlen(recp_cc): 0,
3081                 room,                   /* room where it's going */
3082                 (room)?strlen(room): 0,
3083                 type,                   /* see MES_ types in header file */
3084                 format_type,            /* variformat, plain text, MIME... */
3085                 fake_name,              /* who we're masquerading as */
3086                 (fake_name)?strlen(fake_name): 0,
3087                 my_email,                       /* which of my email addresses to use (empty is ok) */
3088                 (my_email)?strlen(my_email): 0,
3089                 subject,                        /* Subject (optional) */
3090                 (subject)?strlen(subject): 0,
3091                 supplied_euid,          /* ...or NULL if this is irrelevant */
3092                 (supplied_euid)?strlen(supplied_euid):0,
3093                 preformatted_text,      /* ...or NULL to read text from client */
3094                 (preformatted_text)?strlen(preformatted_text) : 0,
3095                 references,             /* Thread references */
3096                 (references)?strlen(references):0);
3097
3098 }
3099
3100
3101 /*
3102  * Build a binary message to be saved on disk.
3103  * (NOTE: if you supply 'preformatted_text', the buffer you give it
3104  * will become part of the message.  This means you are no longer
3105  * responsible for managing that memory -- it will be freed along with
3106  * the rest of the fields when CM_Free() is called.)
3107  */
3108 struct CtdlMessage *CtdlMakeMessageLen(
3109         struct ctdluser *author,        /* author's user structure */
3110         char *recipient,                /* NULL if it's not mail */
3111         long rcplen,
3112         char *recp_cc,                  /* NULL if it's not mail */
3113         long cclen,
3114         char *room,                     /* room where it's going */
3115         long roomlen,
3116         int type,                       /* see MES_ types in header file */
3117         int format_type,                /* variformat, plain text, MIME... */
3118         char *fake_name,                /* who we're masquerading as */
3119         long fnlen,
3120         char *my_email,                 /* which of my email addresses to use (empty is ok) */
3121         long myelen,
3122         char *subject,                  /* Subject (optional) */
3123         long subjlen,
3124         char *supplied_euid,            /* ...or NULL if this is irrelevant */
3125         long euidlen,
3126         char *preformatted_text,        /* ...or NULL to read text from client */
3127         long textlen,
3128         char *references,               /* Thread references */
3129         long reflen
3130 ) {
3131         long blen;
3132         char buf[1024];
3133         struct CtdlMessage *msg;
3134         StrBuf *FakeAuthor;
3135         StrBuf *FakeEncAuthor = NULL;
3136
3137         msg = malloc(sizeof(struct CtdlMessage));
3138         memset(msg, 0, sizeof(struct CtdlMessage));
3139         msg->cm_magic = CTDLMESSAGE_MAGIC;
3140         msg->cm_anon_type = type;
3141         msg->cm_format_type = format_type;
3142
3143         if (recipient != NULL) rcplen = striplt(recipient);
3144         if (recp_cc != NULL) cclen = striplt(recp_cc);
3145
3146         /* Path or Return-Path */
3147         if (myelen > 0) {
3148                 CM_SetField(msg, eMessagePath, my_email, myelen);
3149         }
3150         else if (!IsEmptyStr(author->fullname)) {
3151                 CM_SetField(msg, eMessagePath, author->fullname, -1);
3152         }
3153         convert_spaces_to_underscores(msg->cm_fields[eMessagePath]);
3154
3155         blen = snprintf(buf, sizeof buf, "%ld", (long)time(NULL));
3156         CM_SetField(msg, eTimestamp, buf, blen);
3157
3158         if (fnlen > 0) {
3159                 FakeAuthor = NewStrBufPlain (fake_name, fnlen);
3160         }
3161         else {
3162                 FakeAuthor = NewStrBufPlain (author->fullname, -1);
3163         }
3164         StrBufRFC2047encode(&FakeEncAuthor, FakeAuthor);
3165         CM_SetAsFieldSB(msg, eAuthor, &FakeEncAuthor);
3166         FreeStrBuf(&FakeAuthor);
3167
3168         if (!!IsEmptyStr(CC->room.QRname)) {
3169                 if (CC->room.QRflags & QR_MAILBOX) {            /* room */
3170                         CM_SetField(msg, eOriginalRoom, &CC->room.QRname[11], -1);
3171                 }
3172                 else {
3173                         CM_SetField(msg, eOriginalRoom, CC->room.QRname, -1);
3174                 }
3175         }
3176
3177         if (rcplen > 0) {
3178                 CM_SetField(msg, eRecipient, recipient, rcplen);
3179         }
3180         if (cclen > 0) {
3181                 CM_SetField(msg, eCarbonCopY, recp_cc, cclen);
3182         }
3183
3184         if (myelen > 0) {
3185                 CM_SetField(msg, erFc822Addr, my_email, myelen);
3186         }
3187         else if ( (author == &CC->user) && (!IsEmptyStr(CC->cs_inet_email)) ) {
3188                 CM_SetField(msg, erFc822Addr, CC->cs_inet_email, -1);
3189         }
3190
3191         if (subject != NULL) {
3192                 long length;
3193                 length = striplt(subject);
3194                 if (length > 0) {
3195                         long i;
3196                         long IsAscii;
3197                         IsAscii = -1;
3198                         i = 0;
3199                         while ((subject[i] != '\0') &&
3200                                (IsAscii = isascii(subject[i]) != 0 ))
3201                                 i++;
3202                         if (IsAscii != 0)
3203                                 CM_SetField(msg, eMsgSubject, subject, subjlen);
3204                         else /* ok, we've got utf8 in the string. */
3205                         {
3206                                 char *rfc2047Subj;
3207                                 rfc2047Subj = rfc2047encode(subject, length);
3208                                 CM_SetAsField(msg, eMsgSubject, &rfc2047Subj, strlen(rfc2047Subj));
3209                         }
3210
3211                 }
3212         }
3213
3214         if (euidlen > 0) {
3215                 CM_SetField(msg, eExclusiveID, supplied_euid, euidlen);
3216         }
3217
3218         if (reflen > 0) {
3219                 CM_SetField(msg, eWeferences, references, reflen);
3220         }
3221
3222         if (preformatted_text != NULL) {
3223                 CM_SetField(msg, eMesageText, preformatted_text, textlen);
3224         }
3225         else {
3226                 StrBuf *MsgBody;
3227                 MsgBody = CtdlReadMessageBodyBuf(HKEY("000"), CtdlGetConfigLong("c_maxmsglen"), NULL, 0);
3228                 if (MsgBody != NULL) {
3229                         CM_SetAsFieldSB(msg, eMesageText, &MsgBody);
3230                 }
3231         }
3232
3233         return(msg);
3234 }
3235
3236
3237 /*
3238  * API function to delete messages which match a set of criteria
3239  * (returns the actual number of messages deleted)
3240  */
3241 int CtdlDeleteMessages(const char *room_name,   // which room
3242                        long *dmsgnums,          // array of msg numbers to be deleted
3243                        int num_dmsgnums,        // number of msgs to be deleted, or 0 for "any"
3244                        char *content_type       // or "" for any.  regular expressions expected.
3245 ) {
3246         struct ctdlroom qrbuf;
3247         struct cdbdata *cdbfr;
3248         long *msglist = NULL;
3249         long *dellist = NULL;
3250         int num_msgs = 0;
3251         int i, j;
3252         int num_deleted = 0;
3253         int delete_this;
3254         struct MetaData smi;
3255         regex_t re;
3256         regmatch_t pm;
3257         int need_to_free_re = 0;
3258
3259         if (content_type) if (!IsEmptyStr(content_type)) {
3260                         regcomp(&re, content_type, 0);
3261                         need_to_free_re = 1;
3262                 }
3263         syslog(LOG_DEBUG, "msgbase: CtdlDeleteMessages(%s, %d msgs, %s)", room_name, num_dmsgnums, content_type);
3264
3265         /* get room record, obtaining a lock... */
3266         if (CtdlGetRoomLock(&qrbuf, room_name) != 0) {
3267                 syslog(LOG_ERR, "msgbase: CtdlDeleteMessages(): Room <%s> not found", room_name);
3268                 if (need_to_free_re) regfree(&re);
3269                 return(0);      /* room not found */
3270         }
3271         cdbfr = cdb_fetch(CDB_MSGLISTS, &qrbuf.QRnumber, sizeof(long));
3272
3273         if (cdbfr != NULL) {
3274                 dellist = malloc(cdbfr->len);
3275                 msglist = (long *) cdbfr->ptr;
3276                 cdbfr->ptr = NULL;      /* CtdlDeleteMessages() now owns this memory */
3277                 num_msgs = cdbfr->len / sizeof(long);
3278                 cdb_free(cdbfr);
3279         }
3280         if (num_msgs > 0) {
3281                 int have_contenttype = (content_type != NULL) && !IsEmptyStr(content_type);
3282                 int have_delmsgs = (num_dmsgnums == 0) || (dmsgnums == NULL);
3283                 int have_more_del = 1;
3284
3285                 num_msgs = sort_msglist(msglist, num_msgs);
3286                 if (num_dmsgnums > 1)
3287                         num_dmsgnums = sort_msglist(dmsgnums, num_dmsgnums);
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