citadel/msgbase.c

   1 /*
   2  * Implements the message store.
   3  *
   4  * Copyright (c) 1987-2012 by the citadel.org team
   5  *
   6  * This program is open source software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 3.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15
  16 #include <stdio.h>
  17 #include <regex.h>
  18 #include <libcitadel.h>
  19
  20 #include "md5.h"
  21
  22 #include "ctdl_module.h"
  23 #include "citserver.h"
  24 #include "control.h"
  25 #include "clientsocket.h"
  26 #include "genstamp.h"
  27 #include "room_ops.h"
  28 #include "user_ops.h"
  29
  30 #include "internet_addressing.h"
  31 #include "euidindex.h"
  32 #include "msgbase.h"
  33 #include "journaling.h"
  34
  35 struct addresses_to_be_filed *atbf = NULL;
  36
  37 /* This temp file holds the queue of operations for AdjRefCount() */
  38 static FILE *arcfp = NULL;
  39 void AdjRefCountList(long *msgnum, long nmsg, int incr);
  40
  41 int MessageDebugEnabled = 0;
  42
  43 /*
  44  * These are the four-character field headers we use when outputting
  45  * messages in Citadel format (as opposed to RFC822 format).
  46  */
  47 char *msgkeys[] = {
  48         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  49         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  50         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  51         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  52         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  53         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  54         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  55         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  56         NULL,
  57         "from", /* A */
  58         NULL,   /* B */
  59         NULL,   /* C */
  60         NULL,   /* D */
  61         "exti", /* E */
  62         "rfca", /* F */
  63         NULL,   /* G */
  64         "hnod", /* H */
  65         "msgn", /* I */
  66         "jrnl", /* J */
  67         "rep2", /* K */
  68         "list", /* L */
  69         "text", /* M */
  70         "node", /* N */
  71         "room", /* O */
  72         "path", /* P */
  73         NULL,   /* Q */
  74         "rcpt", /* R */
  75         "spec", /* S */
  76         "time", /* T */
  77         "subj", /* U */
  78         "nvto", /* V */
  79         "wefw", /* W */
  80         NULL,   /* X */
  81         "cccc", /* Y */
  82         NULL    /* Z */
  83 };
  84
  85 eMsgField FieldOrder[]  = {
  86 /* Important fields */
  87         emessageId   ,
  88         eMessagePath ,
  89         eTimestamp   ,
  90         eAuthor      ,
  91         erFc822Addr  ,
  92         eOriginalRoom,
  93         eNodeName    ,
  94         eHumanNode   ,
  95         eRecipient   ,
  96         eDestination ,
  97 /* Semi-important fields */
  98         eBig_message ,
  99         eRemoteRoom  ,
 100         eExclusiveID ,
 101         eWeferences  ,
 102         eJournal     ,
 103 /* G is not used yet, may become virus signature*/
 104         eReplyTo     ,
 105         eListID      ,
 106 /* Q is not used yet */
 107         eSpecialField,
 108         eenVelopeTo  ,
 109 /* X is not used yet */
 110 /* Z is not used yet */
 111         eCarbonCopY  ,
 112         eMsgSubject  ,
 113 /* internal only */
 114         eErrorMsg    ,
 115         eSuppressIdx ,
 116         eExtnotify   ,
 117 /* Message text (MUST be last) */
 118         eMesageText
 119 /* Not saved to disk:
 120         eVltMsgNum
 121 */
 122 };
 123
 124 static const long NDiskFields = sizeof(FieldOrder) / sizeof(eMsgField);
 125
 126 int CM_IsEmpty(struct CtdlMessage *Msg, eMsgField which)
 127 {
 128         return !((Msg->cm_fields[which] != NULL) &&
 129                  (Msg->cm_fields[which][0] != '\0'));
 130 }
 131
 132 void CM_SetField(struct CtdlMessage *Msg, eMsgField which, const char *buf, long length)
 133 {
 134         if (Msg->cm_fields[which] != NULL)
 135                 free (Msg->cm_fields[which]);
 136         Msg->cm_fields[which] = malloc(length + 1);
 137         memcpy(Msg->cm_fields[which], buf, length);
 138         Msg->cm_fields[which][length] = '\0';
 139         Msg->cm_lengths[which] = length;
 140 }
 141
 142 void CM_SetFieldLONG(struct CtdlMessage *Msg, eMsgField which, long lvalue)
 143 {
 144         char buf[128];
 145         long len;
 146         len = snprintf(buf, sizeof(buf), "%ld", lvalue);
 147         CM_SetField(Msg, which, buf, len);
 148 }
 149 void CM_CutFieldAt(struct CtdlMessage *Msg, eMsgField WhichToCut, long maxlen)
 150 {
 151         if (Msg->cm_fields[WhichToCut] == NULL)
 152                 return;
 153
 154         if (Msg->cm_lengths[WhichToCut] > maxlen)
 155         {
 156                 Msg->cm_fields[WhichToCut][maxlen] = '\0';
 157                 Msg->cm_lengths[WhichToCut] = maxlen;
 158         }
 159 }
 160
 161 void CM_FlushField(struct CtdlMessage *Msg, eMsgField which)
 162 {
 163         if (Msg->cm_fields[which] != NULL)
 164                 free (Msg->cm_fields[which]);
 165         Msg->cm_fields[which] = NULL;
 166         Msg->cm_lengths[which] = 0;
 167 }
 168 void CM_Flush(struct CtdlMessage *Msg)
 169 {
 170         int i;
 171
 172         if (CM_IsValidMsg(Msg) == 0)
 173                 return;
 174
 175         for (i = 0; i < 256; ++i)
 176         {
 177                 CM_FlushField(Msg, i);
 178         }
 179 }
 180
 181 void CM_CopyField(struct CtdlMessage *Msg, eMsgField WhichToPutTo, eMsgField WhichtToCopy)
 182 {
 183         long len;
 184         if (Msg->cm_fields[WhichToPutTo] != NULL)
 185                 free (Msg->cm_fields[WhichToPutTo]);
 186
 187         if (Msg->cm_fields[WhichtToCopy] != NULL)
 188         {
 189                 len = Msg->cm_lengths[WhichtToCopy];
 190                 Msg->cm_fields[WhichToPutTo] = malloc(len + 1);
 191                 memcpy(Msg->cm_fields[WhichToPutTo], Msg->cm_fields[WhichtToCopy], len);
 192                 Msg->cm_fields[WhichToPutTo][len] = '\0';
 193                 Msg->cm_lengths[WhichToPutTo] = len;
 194         }
 195         else
 196         {
 197                 Msg->cm_fields[WhichToPutTo] = NULL;
 198                 Msg->cm_lengths[WhichToPutTo] = 0;
 199         }
 200 }
 201
 202
 203 void CM_PrependToField(struct CtdlMessage *Msg, eMsgField which, const char *buf, long length)
 204 {
 205         if (Msg->cm_fields[which] != NULL) {
 206                 long oldmsgsize;
 207                 long newmsgsize;
 208                 char *new;
 209
 210                 oldmsgsize = Msg->cm_lengths[which] + 1;
 211                 newmsgsize = length + oldmsgsize;
 212
 213                 new = malloc(newmsgsize);
 214                 memcpy(new, buf, length);
 215                 memcpy(new + length, Msg->cm_fields[which], oldmsgsize);
 216                 free(Msg->cm_fields[which]);
 217                 Msg->cm_fields[which] = new;
 218                 Msg->cm_lengths[which] = newmsgsize - 1;
 219         }
 220         else {
 221                 Msg->cm_fields[which] = malloc(length + 1);
 222                 memcpy(Msg->cm_fields[which], buf, length);
 223                 Msg->cm_fields[which][length] = '\0';
 224                 Msg->cm_lengths[which] = length;
 225         }
 226 }
 227
 228 void CM_SetAsField(struct CtdlMessage *Msg, eMsgField which, char **buf, long length)
 229 {
 230         if (Msg->cm_fields[which] != NULL)
 231                 free (Msg->cm_fields[which]);
 232
 233         Msg->cm_fields[which] = *buf;
 234         *buf = NULL;
 235         Msg->cm_lengths[which] = length;
 236 }
 237
 238 void CM_SetAsFieldSB(struct CtdlMessage *Msg, eMsgField which, StrBuf **buf)
 239 {
 240         if (Msg->cm_fields[which] != NULL)
 241                 free (Msg->cm_fields[which]);
 242
 243         Msg->cm_lengths[which] = StrLength(*buf);
 244         Msg->cm_fields[which] = SmashStrBuf(buf);
 245 }
 246
 247 void CM_GetAsField(struct CtdlMessage *Msg, eMsgField which, char **ret, long *retlen)
 248 {
 249         if (Msg->cm_fields[which] != NULL)
 250         {
 251                 *retlen = Msg->cm_lengths[which];
 252                 *ret = Msg->cm_fields[which];
 253                 Msg->cm_fields[which] = NULL;
 254                 Msg->cm_lengths[which] = 0;
 255         }
 256         else
 257         {
 258                 *ret = NULL;
 259                 *retlen = 0;
 260         }
 261 }
 262
 263 /*
 264  * Returns 1 if the supplied pointer points to a valid Citadel message.
 265  * If the pointer is NULL or the magic number check fails, returns 0.
 266  */
 267 int CM_IsValidMsg(struct CtdlMessage *msg) {
 268         if (msg == NULL)
 269                 return 0;
 270         if ((msg->cm_magic) != CTDLMESSAGE_MAGIC) {
 271                 struct CitContext *CCC = CC;
 272                 MSGM_syslog(LOG_WARNING, "CM_IsValidMsg() -- self-check failed\n");
 273                 return 0;
 274         }
 275         return 1;
 276 }
 277
 278 void CM_FreeContents(struct CtdlMessage *msg)
 279 {
 280         int i;
 281
 282         for (i = 0; i < 256; ++i)
 283                 if (msg->cm_fields[i] != NULL) {
 284                         free(msg->cm_fields[i]);
 285                         msg->cm_lengths[i] = 0;
 286                 }
 287
 288         msg->cm_magic = 0;      /* just in case */
 289 }
 290 /*
 291  * 'Destructor' for struct CtdlMessage
 292  */
 293 void CM_Free(struct CtdlMessage *msg)
 294 {
 295         if (CM_IsValidMsg(msg) == 0)
 296         {
 297                 if (msg != NULL) free (msg);
 298                 return;
 299         }
 300         CM_FreeContents(msg);
 301         free(msg);
 302 }
 303
 304 int CM_DupField(eMsgField i, struct CtdlMessage *OrgMsg, struct CtdlMessage *NewMsg)
 305 {
 306         long len;
 307         len = OrgMsg->cm_lengths[i];
 308         NewMsg->cm_fields[i] = malloc(len + 1);
 309         if (NewMsg->cm_fields[i] == NULL)
 310                 return 0;
 311         memcpy(NewMsg->cm_fields[i], OrgMsg->cm_fields[i], len);
 312         NewMsg->cm_fields[i][len] = '\0';
 313         NewMsg->cm_lengths[i] = len;
 314         return 1;
 315 }
 316
 317 struct CtdlMessage * CM_Duplicate(struct CtdlMessage *OrgMsg)
 318 {
 319         int i;
 320         struct CtdlMessage *NewMsg;
 321
 322         if (CM_IsValidMsg(OrgMsg) == 0)
 323                 return NULL;
 324         NewMsg = (struct CtdlMessage *)malloc(sizeof(struct CtdlMessage));
 325         if (NewMsg == NULL)
 326                 return NULL;
 327
 328         memcpy(NewMsg, OrgMsg, sizeof(struct CtdlMessage));
 329
 330         memset(&NewMsg->cm_fields, 0, sizeof(char*) * 256);
 331
 332         for (i = 0; i < 256; ++i)
 333         {
 334                 if (OrgMsg->cm_fields[i] != NULL)
 335                 {
 336                         if (!CM_DupField(i, OrgMsg, NewMsg))
 337                         {
 338                                 CM_Free(NewMsg);
 339                                 return NULL;
 340                         }
 341                 }
 342         }
 343
 344         return NewMsg;
 345 }
 346
 347
 348
 349
 350
 351 /* Determine if a given message matches the fields in a message template.
 352  * Return 0 for a successful match.
 353  */
 354 int CtdlMsgCmp(struct CtdlMessage *msg, struct CtdlMessage *template) {
 355         int i;
 356
 357         /* If there aren't any fields in the template, all messages will
 358          * match.
 359          */
 360         if (template == NULL) return(0);
 361
 362         /* Null messages are bogus. */
 363         if (msg == NULL) return(1);
 364
 365         for (i='A'; i<='Z'; ++i) {
 366                 if (template->cm_fields[i] != NULL) {
 367                         if (msg->cm_fields[i] == NULL) {
 368                                 /* Considered equal if temmplate is empty string */
 369                                 if (IsEmptyStr(template->cm_fields[i])) continue;
 370                                 return 1;
 371                         }
 372                         if ((template->cm_lengths[i] != msg->cm_lengths[i]) ||
 373                             (strcasecmp(msg->cm_fields[i], template->cm_fields[i])))
 374                                 return 1;
 375                 }
 376         }
 377
 378         /* All compares succeeded: we have a match! */
 379         return 0;
 380 }
 381
 382
 383
 384 /*
 385  * Retrieve the "seen" message list for the current room.
 386  */
 387 void CtdlGetSeen(char *buf, int which_set) {
 388         struct CitContext *CCC = CC;
 389         visit vbuf;
 390
 391         /* Learn about the user and room in question */
 392         CtdlGetRelationship(&vbuf, &CCC->user, &CCC->room);
 393
 394         if (which_set == ctdlsetseen_seen)
 395                 safestrncpy(buf, vbuf.v_seen, SIZ);
 396         if (which_set == ctdlsetseen_answered)
 397                 safestrncpy(buf, vbuf.v_answered, SIZ);
 398 }
 399
 400
 401
 402 /*
 403  * Manipulate the "seen msgs" string (or other message set strings)
 404  */
 405 void CtdlSetSeen(long *target_msgnums, int num_target_msgnums,
 406                 int target_setting, int which_set,
 407                 struct ctdluser *which_user, struct ctdlroom *which_room) {
 408         struct CitContext *CCC = CC;
 409         struct cdbdata *cdbfr;
 410         int i, k;
 411         int is_seen = 0;
 412         int was_seen = 0;
 413         long lo = (-1L);
 414         long hi = (-1L); /// TODO: we just write here. y?
 415         visit vbuf;
 416         long *msglist;
 417         int num_msgs = 0;
 418         StrBuf *vset;
 419         StrBuf *setstr;
 420         StrBuf *lostr;
 421         StrBuf *histr;
 422         const char *pvset;
 423         char *is_set;   /* actually an array of booleans */
 424
 425         /* Don't bother doing *anything* if we were passed a list of zero messages */
 426         if (num_target_msgnums < 1) {
 427                 return;
 428         }
 429
 430         /* If no room was specified, we go with the current room. */
 431         if (!which_room) {
 432                 which_room = &CCC->room;
 433         }
 434
 435         /* If no user was specified, we go with the current user. */
 436         if (!which_user) {
 437                 which_user = &CCC->user;
 438         }
 439
 440         MSG_syslog(LOG_DEBUG, "CtdlSetSeen(%d msgs starting with %ld, %s, %d) in <%s>\n",
 441                    num_target_msgnums, target_msgnums[0],
 442                    (target_setting ? "SET" : "CLEAR"),
 443                    which_set,
 444                    which_room->QRname);
 445
 446         /* Learn about the user and room in question */
 447         CtdlGetRelationship(&vbuf, which_user, which_room);
 448
 449         /* Load the message list */
 450         cdbfr = cdb_fetch(CDB_MSGLISTS, &which_room->QRnumber, sizeof(long));
 451         if (cdbfr != NULL) {
 452                 msglist = (long *) cdbfr->ptr;
 453                 cdbfr->ptr = NULL;      /* CtdlSetSeen() now owns this memory */
 454                 num_msgs = cdbfr->len / sizeof(long);
 455                 cdb_free(cdbfr);
 456         } else {
 457                 return; /* No messages at all?  No further action. */
 458         }
 459
 460         is_set = malloc(num_msgs * sizeof(char));
 461         memset(is_set, 0, (num_msgs * sizeof(char)) );
 462
 463         /* Decide which message set we're manipulating */
 464         switch(which_set) {
 465         case ctdlsetseen_seen:
 466                 vset = NewStrBufPlain(vbuf.v_seen, -1);
 467                 break;
 468         case ctdlsetseen_answered:
 469                 vset = NewStrBufPlain(vbuf.v_answered, -1);
 470                 break;
 471         default:
 472                 vset = NewStrBuf();
 473         }
 474
 475
 476 #if 0   /* This is a special diagnostic section.  Do not allow it to run during normal operation. */
 477         MSG_syslog(LOG_DEBUG, "There are %d messages in the room.\n", num_msgs);
 478         for (i=0; i<num_msgs; ++i) {
 479                 if ((i > 0) && (msglist[i] <= msglist[i-1])) abort();
 480         }
 481         MSG_syslog(LOG_DEBUG, "We are twiddling %d of them.\n", num_target_msgnums);
 482         for (k=0; k<num_target_msgnums; ++k) {
 483                 if ((k > 0) && (target_msgnums[k] <= target_msgnums[k-1])) abort();
 484         }
 485 #endif
 486
 487         MSG_syslog(LOG_DEBUG, "before update: %s\n", ChrPtr(vset));
 488
 489         /* Translate the existing sequence set into an array of booleans */
 490         setstr = NewStrBuf();
 491         lostr = NewStrBuf();
 492         histr = NewStrBuf();
 493         pvset = NULL;
 494         while (StrBufExtract_NextToken(setstr, vset, &pvset, ',') >= 0) {
 495
 496                 StrBufExtract_token(lostr, setstr, 0, ':');
 497                 if (StrBufNum_tokens(setstr, ':') >= 2) {
 498                         StrBufExtract_token(histr, setstr, 1, ':');
 499                 }
 500                 else {
 501                         FlushStrBuf(histr);
 502                         StrBufAppendBuf(histr, lostr, 0);
 503                 }
 504                 lo = StrTol(lostr);
 505                 if (!strcmp(ChrPtr(histr), "*")) {
 506                         hi = LONG_MAX;
 507                 }
 508                 else {
 509                         hi = StrTol(histr);
 510                 }
 511
 512                 for (i = 0; i < num_msgs; ++i) {
 513                         if ((msglist[i] >= lo) && (msglist[i] <= hi)) {
 514                                 is_set[i] = 1;
 515                         }
 516                 }
 517         }
 518         FreeStrBuf(&setstr);
 519         FreeStrBuf(&lostr);
 520         FreeStrBuf(&histr);
 521
 522
 523         /* Now translate the array of booleans back into a sequence set */
 524         FlushStrBuf(vset);
 525         was_seen = 0;
 526         lo = (-1);
 527         hi = (-1);
 528
 529         for (i=0; i<num_msgs; ++i) {
 530                 is_seen = is_set[i];
 531
 532                 /* Apply changes */
 533                 for (k=0; k<num_target_msgnums; ++k) {
 534                         if (msglist[i] == target_msgnums[k]) {
 535                                 is_seen = target_setting;
 536                         }
 537                 }
 538
 539                 if ((was_seen == 0) && (is_seen == 1)) {
 540                         lo = msglist[i];
 541                 }
 542                 else if ((was_seen == 1) && (is_seen == 0)) {
 543                         hi = msglist[i-1];
 544
 545                         if (StrLength(vset) > 0) {
 546                                 StrBufAppendBufPlain(vset, HKEY(","), 0);
 547                         }
 548                         if (lo == hi) {
 549                                 StrBufAppendPrintf(vset, "%ld", hi);
 550                         }
 551                         else {
 552                                 StrBufAppendPrintf(vset, "%ld:%ld", lo, hi);
 553                         }
 554                 }
 555
 556                 if ((is_seen) && (i == num_msgs - 1)) {
 557                         if (StrLength(vset) > 0) {
 558                                 StrBufAppendBufPlain(vset, HKEY(","), 0);
 559                         }
 560                         if ((i==0) || (was_seen == 0)) {
 561                                 StrBufAppendPrintf(vset, "%ld", msglist[i]);
 562                         }
 563                         else {
 564                                 StrBufAppendPrintf(vset, "%ld:%ld", lo, msglist[i]);
 565                         }
 566                 }
 567
 568                 was_seen = is_seen;
 569         }
 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          */
 577         int number_of_truncations = 0;
 578         while ( (StrLength(vset) > SIZ) && (number_of_truncations < 100) ) {
 579                 StrBufRemove_token(vset, 0, ',');
 580                 ++number_of_truncations;
 581         }
 582
 583         /*
 584          * If we're truncating the sequence set of messages marked with the 'seen' flag,
 585          * we want the earliest messages (the truncated ones) to be marked, not unmarked.
 586          * Otherwise messages at the beginning will suddenly appear to be 'unseen'.
 587          */
 588         if ( (which_set == ctdlsetseen_seen) && (number_of_truncations > 0) ) {
 589                 StrBuf *first_tok;
 590                 first_tok = NewStrBuf();
 591                 StrBufExtract_token(first_tok, vset, 0, ',');
 592                 StrBufRemove_token(vset, 0, ',');
 593
 594                 if (StrBufNum_tokens(first_tok, ':') > 1) {
 595                         StrBufRemove_token(first_tok, 0, ':');
 596                 }
 597
 598                 StrBuf *new_set;
 599                 new_set = NewStrBuf();
 600                 StrBufAppendBufPlain(new_set, HKEY("1:"), 0);
 601                 StrBufAppendBuf(new_set, first_tok, 0);
 602                 StrBufAppendBufPlain(new_set, HKEY(":"), 0);
 603                 StrBufAppendBuf(new_set, vset, 0);
 604
 605                 FreeStrBuf(&vset);
 606                 FreeStrBuf(&first_tok);
 607                 vset = new_set;
 608         }
 609
 610         MSG_syslog(LOG_DEBUG, " after update: %s\n", ChrPtr(vset));
 611
 612         /* Decide which message set we're manipulating */
 613         switch (which_set) {
 614                 case ctdlsetseen_seen:
 615                         safestrncpy(vbuf.v_seen, ChrPtr(vset), sizeof vbuf.v_seen);
 616                         break;
 617                 case ctdlsetseen_answered:
 618                         safestrncpy(vbuf.v_answered, ChrPtr(vset), sizeof vbuf.v_answered);
 619                         break;
 620         }
 621
 622         free(is_set);
 623         free(msglist);
 624         CtdlSetRelationship(&vbuf, which_user, which_room);
 625         FreeStrBuf(&vset);
 626 }
 627
 628
 629 /*
 630  * API function to perform an operation for each qualifying message in the
 631  * current room.  (Returns the number of messages processed.)
 632  */
 633 int CtdlForEachMessage(int mode, long ref, char *search_string,
 634                         char *content_type,
 635                         struct CtdlMessage *compare,
 636                         ForEachMsgCallback CallBack,
 637                         void *userdata)
 638 {
 639         struct CitContext *CCC = CC;
 640         int a, i, j;
 641         visit vbuf;
 642         struct cdbdata *cdbfr;
 643         long *msglist = NULL;
 644         int num_msgs = 0;
 645         int num_processed = 0;
 646         long thismsg;
 647         struct MetaData smi;
 648         struct CtdlMessage *msg = NULL;
 649         int is_seen = 0;
 650         long lastold = 0L;
 651         int printed_lastold = 0;
 652         int num_search_msgs = 0;
 653         long *search_msgs = NULL;
 654         regex_t re;
 655         int need_to_free_re = 0;
 656         regmatch_t pm;
 657
 658         if ((content_type) && (!IsEmptyStr(content_type))) {
 659                 regcomp(&re, content_type, 0);
 660                 need_to_free_re = 1;
 661         }
 662
 663         /* Learn about the user and room in question */
 664         if (server_shutting_down) {
 665                 if (need_to_free_re) regfree(&re);
 666                 return -1;
 667         }
 668         CtdlGetUser(&CCC->user, CCC->curr_user);
 669
 670         if (server_shutting_down) {
 671                 if (need_to_free_re) regfree(&re);
 672                 return -1;
 673         }
 674         CtdlGetRelationship(&vbuf, &CCC->user, &CCC->room);
 675
 676         if (server_shutting_down) {
 677                 if (need_to_free_re) regfree(&re);
 678                 return -1;
 679         }
 680
 681         /* Load the message list */
 682         cdbfr = cdb_fetch(CDB_MSGLISTS, &CCC->room.QRnumber, sizeof(long));
 683         if (cdbfr == NULL) {
 684                 if (need_to_free_re) regfree(&re);
 685                 return 0;       /* No messages at all?  No further action. */
 686         }
 687
 688         msglist = (long *) cdbfr->ptr;
 689         num_msgs = cdbfr->len / sizeof(long);
 690
 691         cdbfr->ptr = NULL;      /* clear this so that cdb_free() doesn't free it */
 692         cdb_free(cdbfr);        /* we own this memory now */
 693
 694         /*
 695          * Now begin the traversal.
 696          */
 697         if (num_msgs > 0) for (a = 0; a < num_msgs; ++a) {
 698
 699                 /* If the caller is looking for a specific MIME type, filter
 700                  * out all messages which are not of the type requested.
 701                  */
 702                 if ((content_type != NULL) && (!IsEmptyStr(content_type))) {
 703
 704                         /* This call to GetMetaData() sits inside this loop
 705                          * so that we only do the extra database read per msg
 706                          * if we need to.  Doing the extra read all the time
 707                          * really kills the server.  If we ever need to use
 708                          * metadata for another search criterion, we need to
 709                          * move the read somewhere else -- but still be smart
 710                          * enough to only do the read if the caller has
 711                          * specified something that will need it.
 712                          */
 713                         if (server_shutting_down) {
 714                                 if (need_to_free_re) regfree(&re);
 715                                 free(msglist);
 716                                 return -1;
 717                         }
 718                         GetMetaData(&smi, msglist[a]);
 719
 720                         /* if (strcasecmp(smi.meta_content_type, content_type)) { old non-regex way */
 721                         if (regexec(&re, smi.meta_content_type, 1, &pm, 0) != 0) {
 722                                 msglist[a] = 0L;
 723                         }
 724                 }
 725         }
 726
 727         num_msgs = sort_msglist(msglist, num_msgs);
 728
 729         /* If a template was supplied, filter out the messages which
 730          * don't match.  (This could induce some delays!)
 731          */
 732         if (num_msgs > 0) {
 733                 if (compare != NULL) {
 734                         for (a = 0; a < num_msgs; ++a) {
 735                                 if (server_shutting_down) {
 736                                         if (need_to_free_re) regfree(&re);
 737                                         free(msglist);
 738                                         return -1;
 739                                 }
 740                                 msg = CtdlFetchMessage(msglist[a], 1);
 741                                 if (msg != NULL) {
 742                                         if (CtdlMsgCmp(msg, compare)) {
 743                                                 msglist[a] = 0L;
 744                                         }
 745                                         CM_Free(msg);
 746                                 }
 747                         }
 748                 }
 749         }
 750
 751         /* If a search string was specified, get a message list from
 752          * the full text index and remove messages which aren't on both
 753          * lists.
 754          *
 755          * How this works:
 756          * Since the lists are sorted and strictly ascending, and the
 757          * output list is guaranteed to be shorter than or equal to the
 758          * input list, we overwrite the bottom of the input list.  This
 759          * eliminates the need to memmove big chunks of the list over and
 760          * over again.
 761          */
 762         if ( (num_msgs > 0) && (mode == MSGS_SEARCH) && (search_string) ) {
 763
 764                 /* Call search module via hook mechanism.
 765                  * NULL means use any search function available.
 766                  * otherwise replace with a char * to name of search routine
 767                  */
 768                 CtdlModuleDoSearch(&num_search_msgs, &search_msgs, search_string, "fulltext");
 769
 770                 if (num_search_msgs > 0) {
 771
 772                         int orig_num_msgs;
 773
 774                         orig_num_msgs = num_msgs;
 775                         num_msgs = 0;
 776                         for (i=0; i<orig_num_msgs; ++i) {
 777                                 for (j=0; j<num_search_msgs; ++j) {
 778                                         if (msglist[i] == search_msgs[j]) {
 779                                                 msglist[num_msgs++] = msglist[i];
 780                                         }
 781                                 }
 782                         }
 783                 }
 784                 else {
 785                         num_msgs = 0;   /* No messages qualify */
 786                 }
 787                 if (search_msgs != NULL) free(search_msgs);
 788
 789                 /* Now that we've purged messages which don't contain the search
 790                  * string, treat a MSGS_SEARCH just like a MSGS_ALL from this
 791                  * point on.
 792                  */
 793                 mode = MSGS_ALL;
 794         }
 795
 796         /*
 797          * Now iterate through the message list, according to the
 798          * criteria supplied by the caller.
 799          */
 800         if (num_msgs > 0)
 801                 for (a = 0; a < num_msgs; ++a) {
 802                         if (server_shutting_down) {
 803                                 if (need_to_free_re) regfree(&re);
 804                                 free(msglist);
 805                                 return num_processed;
 806                         }
 807                         thismsg = msglist[a];
 808                         if (mode == MSGS_ALL) {
 809                                 is_seen = 0;
 810                         }
 811                         else {
 812                                 is_seen = is_msg_in_sequence_set(
 813                                                         vbuf.v_seen, thismsg);
 814                                 if (is_seen) lastold = thismsg;
 815                         }
 816                         if ((thismsg > 0L)
 817                             && (
 818
 819                                        (mode == MSGS_ALL)
 820                                        || ((mode == MSGS_OLD) && (is_seen))
 821                                        || ((mode == MSGS_NEW) && (!is_seen))
 822                                        || ((mode == MSGS_LAST) && (a >= (num_msgs - ref)))
 823                                    || ((mode == MSGS_FIRST) && (a < ref))
 824                                 || ((mode == MSGS_GT) && (thismsg > ref))
 825                                 || ((mode == MSGS_LT) && (thismsg < ref))
 826                                 || ((mode == MSGS_EQ) && (thismsg == ref))
 827                             )
 828                             ) {
 829                                 if ((mode == MSGS_NEW) && (CCC->user.flags & US_LASTOLD) && (lastold > 0L) && (printed_lastold == 0) && (!is_seen)) {
 830                                         if (CallBack)
 831                                                 CallBack(lastold, userdata);
 832                                         printed_lastold = 1;
 833                                         ++num_processed;
 834                                 }
 835                                 if (CallBack) CallBack(thismsg, userdata);
 836                                 ++num_processed;
 837                         }
 838                 }
 839         if (need_to_free_re) regfree(&re);
 840
 841         /*
 842          * We cache the most recent msglist in order to do security checks later
 843          */
 844         if (CCC->client_socket > 0) {
 845                 if (CCC->cached_msglist != NULL) {
 846                         free(CCC->cached_msglist);
 847                 }
 848                 CCC->cached_msglist = msglist;
 849                 CCC->cached_num_msgs = num_msgs;
 850         }
 851         else {
 852                 free(msglist);
 853         }
 854
 855         return num_processed;
 856 }
 857
 858
 859
 860 /*
 861  * memfmout()  -  Citadel text formatter and paginator.
 862  *           Although the original purpose of this routine was to format
 863  *           text to the reader's screen width, all we're really using it
 864  *           for here is to format text out to 80 columns before sending it
 865  *           to the client.  The client software may reformat it again.
 866  */
 867 void memfmout(
 868         char *mptr,             /* where are we going to get our text from? */
 869         const char *nl          /* string to terminate lines with */
 870 ) {
 871         struct CitContext *CCC = CC;
 872         int column = 0;
 873         unsigned char ch = 0;
 874         char outbuf[1024];
 875         int len = 0;
 876         int nllen = 0;
 877
 878         if (!mptr) return;
 879         nllen = strlen(nl);
 880         while (ch=*(mptr++), ch != 0) {
 881
 882                 if (ch == '\n') {
 883                         if (client_write(outbuf, len) == -1)
 884                         {
 885                                 MSGM_syslog(LOG_ERR, "memfmout(): aborting due to write failure.\n");
 886                                 return;
 887                         }
 888                         len = 0;
 889                         if (client_write(nl, nllen) == -1)
 890                         {
 891                                 MSGM_syslog(LOG_ERR, "memfmout(): aborting due to write failure.\n");
 892                                 return;
 893                         }
 894                         column = 0;
 895                 }
 896                 else if (ch == '\r') {
 897                         /* Ignore carriage returns.  Newlines are always LF or CRLF but never CR. */
 898                 }
 899                 else if (isspace(ch)) {
 900                         if (column > 72) {              /* Beyond 72 columns, break on the next space */
 901                                 if (client_write(outbuf, len) == -1)
 902                                 {
 903                                         MSGM_syslog(LOG_ERR, "memfmout(): aborting due to write failure.\n");
 904                                         return;
 905                                 }
 906                                 len = 0;
 907                                 if (client_write(nl, nllen) == -1)
 908                                 {
 909                                         MSGM_syslog(LOG_ERR, "memfmout(): aborting due to write failure.\n");
 910                                         return;
 911                                 }
 912                                 column = 0;
 913                         }
 914                         else {
 915                                 outbuf[len++] = ch;
 916                                 ++column;
 917                         }
 918                 }
 919                 else {
 920                         outbuf[len++] = ch;
 921                         ++column;
 922                         if (column > 1000) {            /* Beyond 1000 columns, break anywhere */
 923                                 if (client_write(outbuf, len) == -1)
 924                                 {
 925                                         MSGM_syslog(LOG_ERR, "memfmout(): aborting due to write failure.\n");
 926                                         return;
 927                                 }
 928                                 len = 0;
 929                                 if (client_write(nl, nllen) == -1)
 930                                 {
 931                                         MSGM_syslog(LOG_ERR, "memfmout(): aborting due to write failure.\n");
 932                                         return;
 933                                 }
 934                                 column = 0;
 935                         }
 936                 }
 937         }
 938         if (len) {
 939                 if (client_write(outbuf, len) == -1)
 940                 {
 941                         MSGM_syslog(LOG_ERR, "memfmout(): aborting due to write failure.\n");
 942                         return;
 943                 }
 944                 client_write(nl, nllen);
 945                 column = 0;
 946         }
 947 }
 948
 949
 950
 951 /*
 952  * Callback function for mime parser that simply lists the part
 953  */
 954 void list_this_part(char *name, char *filename, char *partnum, char *disp,
 955                     void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
 956                     char *cbid, void *cbuserdata)
 957 {
 958         struct ma_info *ma;
 959
 960         ma = (struct ma_info *)cbuserdata;
 961         if (ma->is_ma == 0) {
 962                 cprintf("part=%s|%s|%s|%s|%s|%ld|%s|%s\n",
 963                         name,
 964                         filename,
 965                         partnum,
 966                         disp,
 967                         cbtype,
 968                         (long)length,
 969                         cbid,
 970                         cbcharset);
 971         }
 972 }
 973
 974 /*
 975  * Callback function for multipart prefix
 976  */
 977 void list_this_pref(char *name, char *filename, char *partnum, char *disp,
 978                     void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
 979                     char *cbid, void *cbuserdata)
 980 {
 981         struct ma_info *ma;
 982
 983         ma = (struct ma_info *)cbuserdata;
 984         if (!strcasecmp(cbtype, "multipart/alternative")) {
 985                 ++ma->is_ma;
 986         }
 987
 988         if (ma->is_ma == 0) {
 989                 cprintf("pref=%s|%s\n", partnum, cbtype);
 990         }
 991 }
 992
 993 /*
 994  * Callback function for multipart sufffix
 995  */
 996 void list_this_suff(char *name, char *filename, char *partnum, char *disp,
 997                     void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
 998                     char *cbid, void *cbuserdata)
 999 {
1000         struct ma_info *ma;
1001
1002         ma = (struct ma_info *)cbuserdata;
1003         if (ma->is_ma == 0) {
1004                 cprintf("suff=%s|%s\n", partnum, cbtype);
1005         }
1006         if (!strcasecmp(cbtype, "multipart/alternative")) {
1007                 --ma->is_ma;
1008         }
1009 }
1010
1011
1012 /*
1013  * Callback function for mime parser that opens a section for downloading
1014  * we use serv_files function here:
1015  */
1016 extern void OpenCmdResult(char *filename, const char *mime_type);
1017 void mime_download(char *name, char *filename, char *partnum, char *disp,
1018                    void *content, char *cbtype, char *cbcharset, size_t length,
1019                    char *encoding, char *cbid, void *cbuserdata)
1020 {
1021         int rv = 0;
1022         CitContext *CCC = MyContext();
1023
1024         /* Silently go away if there's already a download open. */
1025         if (CCC->download_fp != NULL)
1026                 return;
1027
1028         if (
1029                 (!IsEmptyStr(partnum) && (!strcasecmp(CCC->download_desired_section, partnum)))
1030         ||      (!IsEmptyStr(cbid) && (!strcasecmp(CCC->download_desired_section, cbid)))
1031         ) {
1032                 CCC->download_fp = tmpfile();
1033                 if (CCC->download_fp == NULL) {
1034                         MSG_syslog(LOG_EMERG, "mime_download(): Couldn't write: %s\n",
1035                                     strerror(errno));
1036                         cprintf("%d cannot open temporary file: %s\n",
1037                                 ERROR + INTERNAL_ERROR, strerror(errno));
1038                         return;
1039                 }
1040
1041                 rv = fwrite(content, length, 1, CCC->download_fp);
1042                 if (rv <= 0) {
1043                         MSG_syslog(LOG_EMERG, "mime_download(): Couldn't write: %s\n",
1044                                    strerror(errno));
1045                         cprintf("%d unable to write tempfile.\n",
1046                                 ERROR + TOO_BIG);
1047                         fclose(CCC->download_fp);
1048                         CCC->download_fp = NULL;
1049                         return;
1050                 }
1051                 fflush(CCC->download_fp);
1052                 rewind(CCC->download_fp);
1053
1054                 OpenCmdResult(filename, cbtype);
1055         }
1056 }
1057
1058
1059
1060 /*
1061  * Callback function for mime parser that outputs a section all at once.
1062  * We can specify the desired section by part number *or* content-id.
1063  */
1064 void mime_spew_section(char *name, char *filename, char *partnum, char *disp,
1065                    void *content, char *cbtype, char *cbcharset, size_t length,
1066                    char *encoding, char *cbid, void *cbuserdata)
1067 {
1068         int *found_it = (int *)cbuserdata;
1069
1070         if (
1071                 (!IsEmptyStr(partnum) && (!strcasecmp(CC->download_desired_section, partnum)))
1072         ||      (!IsEmptyStr(cbid) && (!strcasecmp(CC->download_desired_section, cbid)))
1073         ) {
1074                 *found_it = 1;
1075                 cprintf("%d %d|-1|%s|%s|%s\n",
1076                         BINARY_FOLLOWS,
1077                         (int)length,
1078                         filename,
1079                         cbtype,
1080                         cbcharset
1081                 );
1082                 client_write(content, length);
1083         }
1084 }
1085
1086
1087 /*
1088  * Load a message from disk into memory.
1089  * This is used by CtdlOutputMsg() and other fetch functions.
1090  *
1091  * NOTE: Caller is responsible for freeing the returned CtdlMessage struct
1092  *       using the CtdlMessageFree() function.
1093  */
1094 struct CtdlMessage *CtdlFetchMessage(long msgnum, int with_body)
1095 {
1096         struct CitContext *CCC = CC;
1097         struct cdbdata *dmsgtext;
1098         struct CtdlMessage *ret = NULL;
1099         char *mptr;
1100         char *upper_bound;
1101         cit_uint8_t ch;
1102         cit_uint8_t field_header;
1103         eMsgField which;
1104
1105         MSG_syslog(LOG_DEBUG, "CtdlFetchMessage(%ld, %d)\n", msgnum, with_body);
1106         dmsgtext = cdb_fetch(CDB_MSGMAIN, &msgnum, sizeof(long));
1107         if (dmsgtext == NULL) {
1108                 MSG_syslog(LOG_ERR, "CtdlFetchMessage(%ld, %d) Failed!\n", msgnum, with_body);
1109                 return NULL;
1110         }
1111         mptr = dmsgtext->ptr;
1112         upper_bound = mptr + dmsgtext->len;
1113
1114         /* Parse the three bytes that begin EVERY message on disk.
1115          * The first is always 0xFF, the on-disk magic number.
1116          * The second is the anonymous/public type byte.
1117          * The third is the format type byte (vari, fixed, or MIME).
1118          */
1119         ch = *mptr++;
1120         if (ch != 255) {
1121                 MSG_syslog(LOG_ERR, "Message %ld appears to be corrupted.\n", msgnum);
1122                 cdb_free(dmsgtext);
1123                 return NULL;
1124         }
1125         ret = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
1126         memset(ret, 0, sizeof(struct CtdlMessage));
1127
1128         ret->cm_magic = CTDLMESSAGE_MAGIC;
1129         ret->cm_anon_type = *mptr++;    /* Anon type byte */
1130         ret->cm_format_type = *mptr++;  /* Format type byte */
1131
1132
1133         if (dmsgtext->ptr[dmsgtext->len - 1] != '\0')
1134         {
1135                 MSG_syslog(LOG_ERR, "CtdlFetchMessage(%ld, %d) Forcefully terminating message!!\n", msgnum, with_body);
1136                 dmsgtext->ptr[dmsgtext->len - 1] = '\0';
1137         }
1138
1139         /*
1140          * The rest is zero or more arbitrary fields.  Load them in.
1141          * We're done when we encounter either a zero-length field or
1142          * have just processed the 'M' (message text) field.
1143          */
1144         do {
1145                 field_header = '\0';
1146                 long len;
1147
1148                 /* work around possibly buggy messages: */
1149                 while (field_header == '\0')
1150                 {
1151                         if (mptr >= upper_bound) {
1152                                 break;
1153                         }
1154                         field_header = *mptr++;
1155                 }
1156                 which = field_header;
1157                 len = strlen(mptr);
1158                 CM_SetField(ret, which, mptr, len);
1159
1160                 mptr += len + 1;        /* advance to next field */
1161
1162         } while ((mptr < upper_bound) && (field_header != 'M'));
1163
1164         cdb_free(dmsgtext);
1165
1166         /* Always make sure there's something in the msg text field.  If
1167          * it's NULL, the message text is most likely stored separately,
1168          * so go ahead and fetch that.  Failing that, just set a dummy
1169          * body so other code doesn't barf.
1170          */
1171         if ( (CM_IsEmpty(ret, eMesageText)) && (with_body) ) {
1172                 dmsgtext = cdb_fetch(CDB_BIGMSGS, &msgnum, sizeof(long));
1173                 if (dmsgtext != NULL) {
1174                         CM_SetAsField(ret, eMesageText, &dmsgtext->ptr, dmsgtext->len - 1);
1175                         cdb_free(dmsgtext);
1176                 }
1177         }
1178         if (CM_IsEmpty(ret, eMesageText)) {
1179                 CM_SetField(ret, eMesageText, HKEY("\r\n\r\n (no text)\r\n"));
1180         }
1181
1182         /* Perform "before read" hooks (aborting if any return nonzero) */
1183         if (PerformMessageHooks(ret, NULL, EVT_BEFOREREAD) > 0) {
1184                 CM_Free(ret);
1185                 return NULL;
1186         }
1187
1188         return (ret);
1189 }
1190
1191
1192
1193 /*
1194  * Pre callback function for multipart/alternative
1195  *
1196  * NOTE: this differs from the standard behavior for a reason.  Normally when
1197  *       displaying multipart/alternative you want to show the _last_ usable
1198  *       format in the message.  Here we show the _first_ one, because it's
1199  *       usually text/plain.  Since this set of functions is designed for text
1200  *       output to non-MIME-aware clients, this is the desired behavior.
1201  *
1202  */
1203 void fixed_output_pre(char *name, char *filename, char *partnum, char *disp,
1204                 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
1205                 char *cbid, void *cbuserdata)
1206 {
1207         struct CitContext *CCC = CC;
1208         struct ma_info *ma;
1209
1210         ma = (struct ma_info *)cbuserdata;
1211         MSG_syslog(LOG_DEBUG, "fixed_output_pre() type=<%s>\n", cbtype);
1212         if (!strcasecmp(cbtype, "multipart/alternative")) {
1213                 ++ma->is_ma;
1214                 ma->did_print = 0;
1215         }
1216         if (!strcasecmp(cbtype, "message/rfc822")) {
1217                 ++ma->freeze;
1218         }
1219 }
1220
1221 /*
1222  * Post callback function for multipart/alternative
1223  */
1224 void fixed_output_post(char *name, char *filename, char *partnum, char *disp,
1225                 void *content, char *cbtype, char *cbcharset, size_t length,
1226                 char *encoding, char *cbid, void *cbuserdata)
1227 {
1228         struct CitContext *CCC = CC;
1229         struct ma_info *ma;
1230
1231         ma = (struct ma_info *)cbuserdata;
1232         MSG_syslog(LOG_DEBUG, "fixed_output_post() type=<%s>\n", cbtype);
1233         if (!strcasecmp(cbtype, "multipart/alternative")) {
1234                 --ma->is_ma;
1235                 ma->did_print = 0;
1236         }
1237         if (!strcasecmp(cbtype, "message/rfc822")) {
1238                 --ma->freeze;
1239         }
1240 }
1241
1242 /*
1243  * Inline callback function for mime parser that wants to display text
1244  */
1245 void fixed_output(char *name, char *filename, char *partnum, char *disp,
1246                 void *content, char *cbtype, char *cbcharset, size_t length,
1247                 char *encoding, char *cbid, void *cbuserdata)
1248 {
1249         struct CitContext *CCC = CC;
1250         char *ptr;
1251         char *wptr;
1252         size_t wlen;
1253         struct ma_info *ma;
1254
1255         ma = (struct ma_info *)cbuserdata;
1256
1257         MSG_syslog(LOG_DEBUG,
1258                 "fixed_output() part %s: %s (%s) (%ld bytes)\n",
1259                 partnum, filename, cbtype, (long)length);
1260
1261         /*
1262          * If we're in the middle of a multipart/alternative scope and
1263          * we've already printed another section, skip this one.
1264          */
1265         if ( (ma->is_ma) && (ma->did_print) ) {
1266                 MSG_syslog(LOG_DEBUG, "Skipping part %s (%s)\n", partnum, cbtype);
1267                 return;
1268         }
1269         ma->did_print = 1;
1270
1271         if ( (!strcasecmp(cbtype, "text/plain"))
1272            || (IsEmptyStr(cbtype)) ) {
1273                 wptr = content;
1274                 if (length > 0) {
1275                         client_write(wptr, length);
1276                         if (wptr[length-1] != '\n') {
1277                                 cprintf("\n");
1278                         }
1279                 }
1280                 return;
1281         }
1282
1283         if (!strcasecmp(cbtype, "text/html")) {
1284                 ptr = html_to_ascii(content, length, 80, 0);
1285                 wlen = strlen(ptr);
1286                 client_write(ptr, wlen);
1287                 if ((wlen > 0) && (ptr[wlen-1] != '\n')) {
1288                         cprintf("\n");
1289                 }
1290                 free(ptr);
1291                 return;
1292         }
1293
1294         if (ma->use_fo_hooks) {
1295                 if (PerformFixedOutputHooks(cbtype, content, length)) {
1296                 /* above function returns nonzero if it handled the part */
1297                         return;
1298                 }
1299         }
1300
1301         if (strncasecmp(cbtype, "multipart/", 10)) {
1302                 cprintf("Part %s: %s (%s) (%ld bytes)\r\n",
1303                         partnum, filename, cbtype, (long)length);
1304                 return;
1305         }
1306 }
1307
1308 /*
1309  * The client is elegant and sophisticated and wants to be choosy about
1310  * MIME content types, so figure out which multipart/alternative part
1311  * we're going to send.
1312  *
1313  * We use a system of weights.  When we find a part that matches one of the
1314  * MIME types we've declared as preferential, we can store it in ma->chosen_part
1315  * and then set ma->chosen_pref to that MIME type's position in our preference
1316  * list.  If we then hit another match, we only replace the first match if
1317  * the preference value is lower.
1318  */
1319 void choose_preferred(char *name, char *filename, char *partnum, char *disp,
1320                 void *content, char *cbtype, char *cbcharset, size_t length,
1321                 char *encoding, char *cbid, void *cbuserdata)
1322 {
1323         struct CitContext *CCC = CC;
1324         char buf[1024];
1325         int i;
1326         struct ma_info *ma;
1327
1328         ma = (struct ma_info *)cbuserdata;
1329
1330         // NOTE: REMOVING THIS CONDITIONAL FIXES BUG 220
1331         //       http://bugzilla.citadel.org/show_bug.cgi?id=220
1332         // I don't know if there are any side effects!  Please TEST TEST TEST
1333         //if (ma->is_ma > 0) {
1334
1335         for (i=0; i<num_tokens(CCC->preferred_formats, '|'); ++i) {
1336                 extract_token(buf, CCC->preferred_formats, i, '|', sizeof buf);
1337                 if ( (!strcasecmp(buf, cbtype)) && (!ma->freeze) ) {
1338                         if (i < ma->chosen_pref) {
1339                                 MSG_syslog(LOG_DEBUG, "Setting chosen part: <%s>\n", partnum);
1340                                 safestrncpy(ma->chosen_part, partnum, sizeof ma->chosen_part);
1341                                 ma->chosen_pref = i;
1342                         }
1343                 }
1344         }
1345 }
1346
1347 /*
1348  * Now that we've chosen our preferred part, output it.
1349  */
1350 void output_preferred(char *name,
1351                       char *filename,
1352                       char *partnum,
1353                       char *disp,
1354                       void *content,
1355                       char *cbtype,
1356                       char *cbcharset,
1357                       size_t length,
1358                       char *encoding,
1359                       char *cbid,
1360                       void *cbuserdata)
1361 {
1362         struct CitContext *CCC = CC;
1363         int i;
1364         char buf[128];
1365         int add_newline = 0;
1366         char *text_content;
1367         struct ma_info *ma;
1368         char *decoded = NULL;
1369         size_t bytes_decoded;
1370         int rc = 0;
1371
1372         ma = (struct ma_info *)cbuserdata;
1373
1374         /* This is not the MIME part you're looking for... */
1375         if (strcasecmp(partnum, ma->chosen_part)) return;
1376
1377         /* If the content-type of this part is in our preferred formats
1378          * list, we can simply output it verbatim.
1379          */
1380         for (i=0; i<num_tokens(CCC->preferred_formats, '|'); ++i) {
1381                 extract_token(buf, CCC->preferred_formats, i, '|', sizeof buf);
1382                 if (!strcasecmp(buf, cbtype)) {
1383                         /* Yeah!  Go!  W00t!! */
1384                         if (ma->dont_decode == 0)
1385                                 rc = mime_decode_now (content,
1386                                                       length,
1387                                                       encoding,
1388                                                       &decoded,
1389                                                       &bytes_decoded);
1390                         if (rc < 0)
1391                                 break; /* Give us the chance, maybe theres another one. */
1392
1393                         if (rc == 0) text_content = (char *)content;
1394                         else {
1395                                 text_content = decoded;
1396                                 length = bytes_decoded;
1397                         }
1398
1399                         if (text_content[length-1] != '\n') {
1400                                 ++add_newline;
1401                         }
1402                         cprintf("Content-type: %s", cbtype);
1403                         if (!IsEmptyStr(cbcharset)) {
1404                                 cprintf("; charset=%s", cbcharset);
1405                         }
1406                         cprintf("\nContent-length: %d\n",
1407                                 (int)(length + add_newline) );
1408                         if (!IsEmptyStr(encoding)) {
1409                                 cprintf("Content-transfer-encoding: %s\n", encoding);
1410                         }
1411                         else {
1412                                 cprintf("Content-transfer-encoding: 7bit\n");
1413                         }
1414                         cprintf("X-Citadel-MSG4-Partnum: %s\n", partnum);
1415                         cprintf("\n");
1416                         if (client_write(text_content, length) == -1)
1417                         {
1418                                 MSGM_syslog(LOG_ERR, "output_preferred(): aborting due to write failure.\n");
1419                                 return;
1420                         }
1421                         if (add_newline) cprintf("\n");
1422                         if (decoded != NULL) free(decoded);
1423                         return;
1424                 }
1425         }
1426
1427         /* No translations required or possible: output as text/plain */
1428         cprintf("Content-type: text/plain\n\n");
1429         rc = 0;
1430         if (ma->dont_decode == 0)
1431                 rc = mime_decode_now (content,
1432                                       length,
1433                                       encoding,
1434                                       &decoded,
1435                                       &bytes_decoded);
1436         if (rc < 0)
1437                 return; /* Give us the chance, maybe theres another one. */
1438
1439         if (rc == 0) text_content = (char *)content;
1440         else {
1441                 text_content = decoded;
1442                 length = bytes_decoded;
1443         }
1444
1445         fixed_output(name, filename, partnum, disp, text_content, cbtype, cbcharset,
1446                         length, encoding, cbid, cbuserdata);
1447         if (decoded != NULL) free(decoded);
1448 }
1449
1450
1451 struct encapmsg {
1452         char desired_section[64];
1453         char *msg;
1454         size_t msglen;
1455 };
1456
1457
1458 /*
1459  * Callback function for
1460  */
1461 void extract_encapsulated_message(char *name, char *filename, char *partnum, char *disp,
1462                    void *content, char *cbtype, char *cbcharset, size_t length,
1463                    char *encoding, char *cbid, void *cbuserdata)
1464 {
1465         struct encapmsg *encap;
1466
1467         encap = (struct encapmsg *)cbuserdata;
1468
1469         /* Only proceed if this is the desired section... */
1470         if (!strcasecmp(encap->desired_section, partnum)) {
1471                 encap->msglen = length;
1472                 encap->msg = malloc(length + 2);
1473                 memcpy(encap->msg, content, length);
1474                 return;
1475         }
1476 }
1477
1478
1479 /*
1480  * Determine whether the specified message exists in the cached_msglist
1481  * (This is a security check)
1482  */
1483 int check_cached_msglist(long msgnum) {
1484         struct CitContext *CCC = CC;
1485
1486         /* cases in which we skip the check */
1487         if (!CCC) return om_ok;                                         /* not a session */
1488         if (CCC->client_socket <= 0) return om_ok;                      /* not a client session */
1489         if (CCC->cached_msglist == NULL) return om_access_denied;       /* no msglist fetched */
1490         if (CCC->cached_num_msgs == 0) return om_access_denied;         /* nothing to check */
1491
1492
1493         /* Do a binary search within the cached_msglist for the requested msgnum */
1494         int min = 0;
1495         int max = (CC->cached_num_msgs - 1);
1496
1497         while (max >= min) {
1498                 int middle = min + (max-min) / 2 ;
1499                 if (msgnum == CCC->cached_msglist[middle]) {
1500                         return om_ok;
1501                 }
1502                 if (msgnum > CC->cached_msglist[middle]) {
1503                         min = middle + 1;
1504                 }
1505                 else {
1506                         max = middle - 1;
1507                 }
1508         }
1509
1510         return om_access_denied;
1511 }
1512
1513
1514
1515 /*
1516  * Get a message off disk.  (returns om_* values found in msgbase.h)
1517  *
1518  */
1519 int CtdlOutputMsg(long msg_num,         /* message number (local) to fetch */
1520                   int mode,             /* how would you like that message? */
1521                   int headers_only,     /* eschew the message body? */
1522                   int do_proto,         /* do Citadel protocol responses? */
1523                   int crlf,             /* Use CRLF newlines instead of LF? */
1524                   char *section,        /* NULL or a message/rfc822 section */
1525                   int flags,            /* various flags; see msgbase.h */
1526                   char **Author,
1527                   char **Address
1528 ) {
1529         struct CitContext *CCC = CC;
1530         struct CtdlMessage *TheMessage = NULL;
1531         int retcode = CIT_OK;
1532         struct encapmsg encap;
1533         int r;
1534
1535         MSG_syslog(LOG_DEBUG, "CtdlOutputMsg(msgnum=%ld, mode=%d, section=%s)\n",
1536                 msg_num, mode,
1537                 (section ? section : "<>")
1538         );
1539
1540         r = CtdlDoIHavePermissionToReadMessagesInThisRoom();
1541         if (r != om_ok) {
1542                 if (do_proto) {
1543                         if (r == om_not_logged_in) {
1544                                 cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
1545                         }
1546                         else {
1547                                 cprintf("%d An unknown error has occurred.\n", ERROR);
1548                         }
1549                 }
1550                 return(r);
1551         }
1552
1553         /*
1554          * Check to make sure the message is actually IN this room
1555          */
1556         r = check_cached_msglist(msg_num);
1557         if (r == om_access_denied) {
1558                 /* Not in the cache?  We get ONE shot to check it again. */
1559                 CtdlForEachMessage(MSGS_ALL, 0L, NULL, NULL, NULL, NULL, NULL);
1560                 r = check_cached_msglist(msg_num);
1561         }
1562         if (r != om_ok) {
1563                 MSG_syslog(LOG_DEBUG, "Security check fail: message %ld is not in %s\n",
1564                            msg_num, CCC->room.QRname
1565                 );
1566                 if (do_proto) {
1567                         if (r == om_access_denied) {
1568                                 cprintf("%d message %ld was not found in this room\n",
1569                                         ERROR + HIGHER_ACCESS_REQUIRED,
1570                                         msg_num
1571                                 );
1572                         }
1573                 }
1574                 return(r);
1575         }
1576
1577         /*
1578          * Fetch the message from disk.  If we're in HEADERS_FAST mode,
1579          * request that we don't even bother loading the body into memory.
1580          */
1581         if (headers_only == HEADERS_FAST) {
1582                 TheMessage = CtdlFetchMessage(msg_num, 0);
1583         }
1584         else {
1585                 TheMessage = CtdlFetchMessage(msg_num, 1);
1586         }
1587
1588         if (TheMessage == NULL) {
1589                 if (do_proto) cprintf("%d Can't locate msg %ld on disk\n",
1590                         ERROR + MESSAGE_NOT_FOUND, msg_num);
1591                 return(om_no_such_msg);
1592         }
1593
1594         /* Here is the weird form of this command, to process only an
1595          * encapsulated message/rfc822 section.
1596          */
1597         if (section) if (!IsEmptyStr(section)) if (strcmp(section, "0")) {
1598                 memset(&encap, 0, sizeof encap);
1599                 safestrncpy(encap.desired_section, section, sizeof encap.desired_section);
1600                 mime_parser(CM_RANGE(TheMessage, eMesageText),
1601                             *extract_encapsulated_message,
1602                             NULL, NULL, (void *)&encap, 0
1603                         );
1604
1605                 if ((Author != NULL) && (*Author == NULL))
1606                 {
1607                         long len;
1608                         CM_GetAsField(TheMessage, eAuthor, Author, &len);
1609                 }
1610                 if ((Address != NULL) && (*Address == NULL))
1611                 {
1612                         long len;
1613                         CM_GetAsField(TheMessage, erFc822Addr, Address, &len);
1614                 }
1615                 CM_Free(TheMessage);
1616                 TheMessage = NULL;
1617
1618                 if (encap.msg) {
1619                         encap.msg[encap.msglen] = 0;
1620                         TheMessage = convert_internet_message(encap.msg);
1621                         encap.msg = NULL;       /* no free() here, TheMessage owns it now */
1622
1623                         /* Now we let it fall through to the bottom of this
1624                          * function, because TheMessage now contains the
1625                          * encapsulated message instead of the top-level
1626                          * message.  Isn't that neat?
1627                          */
1628                 }
1629                 else {
1630                         if (do_proto) {
1631                                 cprintf("%d msg %ld has no part %s\n",
1632                                         ERROR + MESSAGE_NOT_FOUND,
1633                                         msg_num,
1634                                         section);
1635                         }
1636                         retcode = om_no_such_msg;
1637                 }
1638
1639         }
1640
1641         /* Ok, output the message now */
1642         if (retcode == CIT_OK)
1643                 retcode = CtdlOutputPreLoadedMsg(TheMessage, mode, headers_only, do_proto, crlf, flags);
1644         if ((Author != NULL) && (*Author == NULL))
1645         {
1646                 long len;
1647                 CM_GetAsField(TheMessage, eAuthor, Author, &len);
1648         }
1649         if ((Address != NULL) && (*Address == NULL))
1650         {
1651                 long len;
1652                 CM_GetAsField(TheMessage, erFc822Addr, Address, &len);
1653         }
1654
1655         CM_Free(TheMessage);
1656
1657         return(retcode);
1658 }
1659
1660
1661
1662 void OutputCtdlMsgHeaders(
1663         struct CtdlMessage *TheMessage,
1664         int do_proto)           /* do Citadel protocol responses? */
1665 {
1666         int i;
1667         int suppress_f = 0;
1668         char buf[SIZ];
1669         char display_name[256];
1670
1671         /* begin header processing loop for Citadel message format */
1672         safestrncpy(display_name, "<unknown>", sizeof display_name);
1673         if (!CM_IsEmpty(TheMessage, eAuthor)) {
1674                 strcpy(buf, TheMessage->cm_fields[eAuthor]);
1675                 if (TheMessage->cm_anon_type == MES_ANONONLY) {
1676                         safestrncpy(display_name, "****", sizeof display_name);
1677                 }
1678                 else if (TheMessage->cm_anon_type == MES_ANONOPT) {
1679                         safestrncpy(display_name, "anonymous", sizeof display_name);
1680                 }
1681                 else {
1682                         safestrncpy(display_name, buf, sizeof display_name);
1683                 }
1684                 if ((is_room_aide())
1685                     && ((TheMessage->cm_anon_type == MES_ANONONLY)
1686                         || (TheMessage->cm_anon_type == MES_ANONOPT))) {
1687                         size_t tmp = strlen(display_name);
1688                         snprintf(&display_name[tmp],
1689                                  sizeof display_name - tmp,
1690                                  " [%s]", buf);
1691                 }
1692         }
1693
1694         /* Don't show Internet address for users on the
1695          * local Citadel network.
1696          */
1697         suppress_f = 0;
1698         if (!CM_IsEmpty(TheMessage, eNodeName) &&
1699             (haschar(TheMessage->cm_fields[eNodeName], '.') == 0))
1700         {
1701                 suppress_f = 1;
1702         }
1703
1704         /* Now spew the header fields in the order we like them. */
1705         for (i=0; i< NDiskFields; ++i) {
1706                 eMsgField Field;
1707                 Field = FieldOrder[i];
1708                 if (Field != eMesageText) {
1709                         if ( (!CM_IsEmpty(TheMessage, Field))
1710                              && (msgkeys[Field] != NULL) ) {
1711                                 if ((Field == eenVelopeTo) ||
1712                                     (Field == eRecipient) ||
1713                                     (Field == eCarbonCopY)) {
1714                                         sanitize_truncated_recipient(TheMessage->cm_fields[Field]);
1715                                 }
1716                                 if (Field == eAuthor) {
1717                                         if (do_proto) cprintf("%s=%s\n",
1718                                                               msgkeys[Field],
1719                                                               display_name);
1720                                 }
1721                                 else if ((Field == erFc822Addr) && (suppress_f)) {
1722                                         /* do nothing */
1723                                 }
1724                                 /* Masquerade display name if needed */
1725                                 else {
1726                                         if (do_proto) cprintf("%s=%s\n",
1727                                                               msgkeys[Field],
1728                                                               TheMessage->cm_fields[Field]
1729                                                 );
1730                                 }
1731                         }
1732                 }
1733         }
1734
1735 }
1736
1737 void OutputRFC822MsgHeaders(
1738         struct CtdlMessage *TheMessage,
1739         int flags,              /* should the bessage be exported clean */
1740         const char *nl,
1741         char *mid, long sizeof_mid,
1742         char *suser, long sizeof_suser,
1743         char *luser, long sizeof_luser,
1744         char *fuser, long sizeof_fuser,
1745         char *snode, long sizeof_snode)
1746 {
1747         char datestamp[100];
1748         int subject_found = 0;
1749         char buf[SIZ];
1750         int i, j, k;
1751         char *mptr = NULL;
1752         char *mpptr = NULL;
1753         char *hptr;
1754
1755         for (i = 0; i < NDiskFields; ++i) {
1756                 if (TheMessage->cm_fields[FieldOrder[i]]) {
1757                         mptr = mpptr = TheMessage->cm_fields[FieldOrder[i]];
1758                         switch (FieldOrder[i]) {
1759                         case eAuthor:
1760                                 safestrncpy(luser, mptr, sizeof_luser);
1761                                 safestrncpy(suser, mptr, sizeof_suser);
1762                                 break;
1763                         case eCarbonCopY:
1764                                 if ((flags & QP_EADDR) != 0) {
1765                                         mptr = qp_encode_email_addrs(mptr);
1766                                 }
1767                                 sanitize_truncated_recipient(mptr);
1768                                 cprintf("CC: %s%s", mptr, nl);
1769                                 break;
1770                         case eMessagePath:
1771                                 cprintf("Return-Path: %s%s", mptr, nl);
1772                                 break;
1773                         case eListID:
1774                                 cprintf("List-ID: %s%s", mptr, nl);
1775                                 break;
1776                         case eenVelopeTo:
1777                                 if ((flags & QP_EADDR) != 0)
1778                                         mptr = qp_encode_email_addrs(mptr);
1779                                 hptr = mptr;
1780                                 while ((*hptr != '\0') && isspace(*hptr))
1781                                         hptr ++;
1782                                 if (!IsEmptyStr(hptr))
1783                                         cprintf("Envelope-To: %s%s", hptr, nl);
1784                                 break;
1785                         case eMsgSubject:
1786                                 cprintf("Subject: %s%s", mptr, nl);
1787                                 subject_found = 1;
1788                                 break;
1789                         case emessageId:
1790                                 safestrncpy(mid, mptr, sizeof_mid); /// TODO: detect @ here and copy @nodename in if not found.
1791                                 break;
1792                         case erFc822Addr:
1793                                 safestrncpy(fuser, mptr, sizeof_fuser);
1794                         /* case eOriginalRoom:
1795                            cprintf("X-Citadel-Room: %s%s",
1796                            mptr, nl)
1797                            break;
1798                            ; */
1799                         case eNodeName:
1800                                 safestrncpy(snode, mptr, sizeof_snode);
1801                                 break;
1802                         case eRecipient:
1803                                 if (haschar(mptr, '@') == 0)
1804                                 {
1805                                         sanitize_truncated_recipient(mptr);
1806                                         cprintf("To: %s@%s", mptr, config.c_fqdn);
1807                                         cprintf("%s", nl);
1808                                 }
1809                                 else
1810                                 {
1811                                         if ((flags & QP_EADDR) != 0) {
1812                                                 mptr = qp_encode_email_addrs(mptr);
1813                                         }
1814                                         sanitize_truncated_recipient(mptr);
1815                                         cprintf("To: %s", mptr);
1816                                         cprintf("%s", nl);
1817                                 }
1818                                 break;
1819                         case eTimestamp:
1820                                 datestring(datestamp, sizeof datestamp,
1821                                            atol(mptr), DATESTRING_RFC822);
1822                                 cprintf("Date: %s%s", datestamp, nl);
1823                                 break;
1824                         case eWeferences:
1825                                 cprintf("References: ");
1826                                 k = num_tokens(mptr, '|');
1827                                 for (j=0; j<k; ++j) {
1828                                         extract_token(buf, mptr, j, '|', sizeof buf);
1829                                         cprintf("<%s>", buf);
1830                                         if (j == (k-1)) {
1831                                                 cprintf("%s", nl);
1832                                         }
1833                                         else {
1834                                                 cprintf(" ");
1835                                         }
1836                                 }
1837                                 break;
1838                         case eReplyTo:
1839                                 hptr = mptr;
1840                                 while ((*hptr != '\0') && isspace(*hptr))
1841                                         hptr ++;
1842                                 if (!IsEmptyStr(hptr))
1843                                         cprintf("Reply-To: %s%s", mptr, nl);
1844                                 break;
1845
1846                         case eRemoteRoom:
1847                         case eDestination:
1848                         case eExclusiveID:
1849                         case eHumanNode:
1850                         case eJournal:
1851                         case eMesageText:
1852                         case eBig_message:
1853                         case eOriginalRoom:
1854                         case eSpecialField:
1855                         case eErrorMsg:
1856                         case eSuppressIdx:
1857                         case eExtnotify:
1858                         case eVltMsgNum:
1859                                 /* these don't map to mime message headers. */
1860                                 break;
1861
1862                         }
1863                         if (mptr != mpptr)
1864                                 free (mptr);
1865                 }
1866         }
1867         if (subject_found == 0) {
1868                 cprintf("Subject: (no subject)%s", nl);
1869         }
1870 }
1871
1872
1873 void Dump_RFC822HeadersBody(
1874         struct CtdlMessage *TheMessage,
1875         int headers_only,       /* eschew the message body? */
1876         int flags,              /* should the bessage be exported clean? */
1877
1878         const char *nl)
1879 {
1880         cit_uint8_t prev_ch;
1881         int eoh = 0;
1882         const char *StartOfText = StrBufNOTNULL;
1883         char outbuf[1024];
1884         int outlen = 0;
1885         int nllen = strlen(nl);
1886         char *mptr;
1887
1888         mptr = TheMessage->cm_fields[eMesageText];
1889
1890
1891         prev_ch = '\0';
1892         while (*mptr != '\0') {
1893                 if (*mptr == '\r') {
1894                         /* do nothing */
1895                 }
1896                 else {
1897                         if ((!eoh) &&
1898                             (*mptr == '\n'))
1899                         {
1900                                 eoh = (*(mptr+1) == '\r') && (*(mptr+2) == '\n');
1901                                 if (!eoh)
1902                                         eoh = *(mptr+1) == '\n';
1903                                 if (eoh)
1904                                 {
1905                                         StartOfText = mptr;
1906                                         StartOfText = strchr(StartOfText, '\n');
1907                                         StartOfText = strchr(StartOfText, '\n');
1908                                 }
1909                         }
1910                         if (((headers_only == HEADERS_NONE) && (mptr >= StartOfText)) ||
1911                             ((headers_only == HEADERS_ONLY) && (mptr < StartOfText)) ||
1912                             ((headers_only != HEADERS_NONE) &&
1913                              (headers_only != HEADERS_ONLY))
1914                                 ) {
1915                                 if (*mptr == '\n') {
1916                                         memcpy(&outbuf[outlen], nl, nllen);
1917                                         outlen += nllen;
1918                                         outbuf[outlen] = '\0';
1919                                 }
1920                                 else {
1921                                         outbuf[outlen++] = *mptr;
1922                                 }
1923                         }
1924                 }
1925                 if (flags & ESC_DOT)
1926                 {
1927                         if ((prev_ch == '\n') &&
1928                             (*mptr == '.') &&
1929                             ((*(mptr+1) == '\r') || (*(mptr+1) == '\n')))
1930                         {
1931                                 outbuf[outlen++] = '.';
1932                         }
1933                         prev_ch = *mptr;
1934                 }
1935                 ++mptr;
1936                 if (outlen > 1000) {
1937                         if (client_write(outbuf, outlen) == -1)
1938                         {
1939                                 struct CitContext *CCC = CC;
1940                                 MSGM_syslog(LOG_ERR, "Dump_RFC822HeadersBody(): aborting due to write failure.\n");
1941                                 return;
1942                         }
1943                         outlen = 0;
1944                 }
1945         }
1946         if (outlen > 0) {
1947                 client_write(outbuf, outlen);
1948         }
1949 }
1950
1951
1952
1953 /* If the format type on disk is 1 (fixed-format), then we want
1954  * everything to be output completely literally ... regardless of
1955  * what message transfer format is in use.
1956  */
1957 void DumpFormatFixed(
1958         struct CtdlMessage *TheMessage,
1959         int mode,               /* how would you like that message? */
1960         const char *nl)
1961 {
1962         cit_uint8_t ch;
1963         char buf[SIZ];
1964         int buflen;
1965         int xlline = 0;
1966         int nllen = strlen (nl);
1967         char *mptr;
1968
1969         mptr = TheMessage->cm_fields[eMesageText];
1970
1971         if (mode == MT_MIME) {
1972                 cprintf("Content-type: text/plain\n\n");
1973         }
1974         *buf = '\0';
1975         buflen = 0;
1976         while (ch = *mptr++, ch > 0) {
1977                 if (ch == '\n')
1978                         ch = '\r';
1979
1980                 if ((buflen > 250) && (!xlline)){
1981                         int tbuflen;
1982                         tbuflen = buflen;
1983
1984                         while ((buflen > 0) &&
1985                                (!isspace(buf[buflen])))
1986                                 buflen --;
1987                         if (buflen == 0) {
1988                                 xlline = 1;
1989                         }
1990                         else {
1991                                 mptr -= tbuflen - buflen;
1992                                 buf[buflen] = '\0';
1993                                 ch = '\r';
1994                         }
1995                 }
1996                 /* if we reach the outer bounds of our buffer,
1997                    abort without respect what whe purge. */
1998                 if (xlline &&
1999                     ((isspace(ch)) ||
2000                      (buflen > SIZ - nllen - 2)))
2001                         ch = '\r';
2002
2003                 if (ch == '\r') {
2004                         memcpy (&buf[buflen], nl, nllen);
2005                         buflen += nllen;
2006                         buf[buflen] = '\0';
2007
2008                         if (client_write(buf, buflen) == -1)
2009                         {
2010                                 struct CitContext *CCC = CC;
2011                                 MSGM_syslog(LOG_ERR, "DumpFormatFixed(): aborting due to write failure.\n");
2012                                 return;
2013                         }
2014                         *buf = '\0';
2015                         buflen = 0;
2016                         xlline = 0;
2017                 } else {
2018                         buf[buflen] = ch;
2019                         buflen++;
2020                 }
2021         }
2022         buf[buflen] = '\0';
2023         if (!IsEmptyStr(buf))
2024                 cprintf("%s%s", buf, nl);
2025 }
2026
2027 /*
2028  * Get a message off disk.  (returns om_* values found in msgbase.h)
2029  */
2030 int CtdlOutputPreLoadedMsg(
2031                 struct CtdlMessage *TheMessage,
2032                 int mode,               /* how would you like that message? */
2033                 int headers_only,       /* eschew the message body? */
2034                 int do_proto,           /* do Citadel protocol responses? */
2035                 int crlf,               /* Use CRLF newlines instead of LF? */
2036                 int flags               /* should the bessage be exported clean? */
2037 ) {
2038         struct CitContext *CCC = CC;
2039         int i;
2040         const char *nl; /* newline string */
2041         struct ma_info ma;
2042
2043         /* Buffers needed for RFC822 translation.  These are all filled
2044          * using functions that are bounds-checked, and therefore we can
2045          * make them substantially smaller than SIZ.
2046          */
2047         char suser[100];
2048         char luser[100];
2049         char fuser[100];
2050         char snode[100];
2051         char mid[100];
2052
2053         MSG_syslog(LOG_DEBUG, "CtdlOutputPreLoadedMsg(TheMessage=%s, %d, %d, %d, %d\n",
2054                    ((TheMessage == NULL) ? "NULL" : "not null"),
2055                    mode, headers_only, do_proto, crlf);
2056
2057         strcpy(mid, "unknown");
2058         nl = (crlf ? "\r\n" : "\n");
2059
2060         if (!CM_IsValidMsg(TheMessage)) {
2061                 MSGM_syslog(LOG_ERR,
2062                             "ERROR: invalid preloaded message for output\n");
2063                 cit_backtrace ();
2064                 return(om_no_such_msg);
2065         }
2066
2067         /* Suppress envelope recipients if required to avoid disclosing BCC addresses.
2068          * Pad it with spaces in order to avoid changing the RFC822 length of the message.
2069          */
2070         if ( (flags & SUPPRESS_ENV_TO) && (!CM_IsEmpty(TheMessage, eenVelopeTo)) ) {
2071                 memset(TheMessage->cm_fields[eenVelopeTo], ' ', TheMessage->cm_lengths[eenVelopeTo]);
2072         }
2073
2074         /* Are we downloading a MIME component? */
2075         if (mode == MT_DOWNLOAD) {
2076                 if (TheMessage->cm_format_type != FMT_RFC822) {
2077                         if (do_proto)
2078                                 cprintf("%d This is not a MIME message.\n",
2079                                 ERROR + ILLEGAL_VALUE);
2080                 } else if (CCC->download_fp != NULL) {
2081                         if (do_proto) cprintf(
2082                                 "%d You already have a download open.\n",
2083                                 ERROR + RESOURCE_BUSY);
2084                 } else {
2085                         /* Parse the message text component */
2086                         mime_parser(CM_RANGE(TheMessage, eMesageText),
2087                                     *mime_download, NULL, NULL, NULL, 0);
2088                         /* If there's no file open by this time, the requested
2089                          * section wasn't found, so print an error
2090                          */
2091                         if (CCC->download_fp == NULL) {
2092                                 if (do_proto) cprintf(
2093                                         "%d Section %s not found.\n",
2094                                         ERROR + FILE_NOT_FOUND,
2095                                         CCC->download_desired_section);
2096                         }
2097                 }
2098                 return((CCC->download_fp != NULL) ? om_ok : om_mime_error);
2099         }
2100
2101         /* MT_SPEW_SECTION is like MT_DOWNLOAD except it outputs the whole MIME part
2102          * in a single server operation instead of opening a download file.
2103          */
2104         if (mode == MT_SPEW_SECTION) {
2105                 if (TheMessage->cm_format_type != FMT_RFC822) {
2106                         if (do_proto)
2107                                 cprintf("%d This is not a MIME message.\n",
2108                                 ERROR + ILLEGAL_VALUE);
2109                 } else {
2110                         /* Parse the message text component */
2111                         int found_it = 0;
2112
2113                         mime_parser(CM_RANGE(TheMessage, eMesageText),
2114                                     *mime_spew_section, NULL, NULL, (void *)&found_it, 0);
2115                         /* If section wasn't found, print an error
2116                          */
2117                         if (!found_it) {
2118                                 if (do_proto) cprintf(
2119                                         "%d Section %s not found.\n",
2120                                         ERROR + FILE_NOT_FOUND,
2121                                         CCC->download_desired_section);
2122                         }
2123                 }
2124                 return((CCC->download_fp != NULL) ? om_ok : om_mime_error);
2125         }
2126
2127         /* now for the user-mode message reading loops */
2128         if (do_proto) cprintf("%d msg:\n", LISTING_FOLLOWS);
2129
2130         /* Does the caller want to skip the headers? */
2131         if (headers_only == HEADERS_NONE) goto START_TEXT;
2132
2133         /* Tell the client which format type we're using. */
2134         if ( (mode == MT_CITADEL) && (do_proto) ) {
2135                 cprintf("type=%d\n", TheMessage->cm_format_type);
2136         }
2137
2138         /* nhdr=yes means that we're only displaying headers, no body */
2139         if ( (TheMessage->cm_anon_type == MES_ANONONLY)
2140            && ((mode == MT_CITADEL) || (mode == MT_MIME))
2141            && (do_proto)
2142            ) {
2143                 cprintf("nhdr=yes\n");
2144         }
2145
2146         if ((mode == MT_CITADEL) || (mode == MT_MIME))
2147                 OutputCtdlMsgHeaders(TheMessage, do_proto);
2148
2149
2150         /* begin header processing loop for RFC822 transfer format */
2151         strcpy(suser, "");
2152         strcpy(luser, "");
2153         strcpy(fuser, "");
2154         memcpy(snode, CFG_KEY(c_nodename) + 1);
2155         if (mode == MT_RFC822)
2156                 OutputRFC822MsgHeaders(
2157                         TheMessage,
2158                         flags,
2159                         nl,
2160                         mid, sizeof(mid),
2161                         suser, sizeof(suser),
2162                         luser, sizeof(luser),
2163                         fuser, sizeof(fuser),
2164                         snode, sizeof(snode)
2165                         );
2166
2167
2168         for (i=0; !IsEmptyStr(&suser[i]); ++i) {
2169                 suser[i] = tolower(suser[i]);
2170                 if (!isalnum(suser[i])) suser[i]='_';
2171         }
2172
2173         if (mode == MT_RFC822) {
2174                 if (!strcasecmp(snode, NODENAME)) {
2175                         safestrncpy(snode, FQDN, sizeof snode);
2176                 }
2177
2178                 /* Construct a fun message id */
2179                 cprintf("Message-ID: <%s", mid);/// todo: this possibly breaks threadding mails.
2180                 if (strchr(mid, '@')==NULL) {
2181                         cprintf("@%s", snode);
2182                 }
2183                 cprintf(">%s", nl);
2184
2185                 if (!is_room_aide() && (TheMessage->cm_anon_type == MES_ANONONLY)) {
2186                         cprintf("From: \"----\" <x@x.org>%s", nl);
2187                 }
2188                 else if (!is_room_aide() && (TheMessage->cm_anon_type == MES_ANONOPT)) {
2189                         cprintf("From: \"anonymous\" <x@x.org>%s", nl);
2190                 }
2191                 else if (!IsEmptyStr(fuser)) {
2192                         cprintf("From: \"%s\" <%s>%s", luser, fuser, nl);
2193                 }
2194                 else {
2195                         cprintf("From: \"%s\" <%s@%s>%s", luser, suser, snode, nl);
2196                 }
2197
2198                 /* Blank line signifying RFC822 end-of-headers */
2199                 if (TheMessage->cm_format_type != FMT_RFC822) {
2200                         cprintf("%s", nl);
2201                 }
2202         }
2203
2204         /* end header processing loop ... at this point, we're in the text */
2205 START_TEXT:
2206         if (headers_only == HEADERS_FAST) goto DONE;
2207
2208         /* Tell the client about the MIME parts in this message */
2209         if (TheMessage->cm_format_type == FMT_RFC822) {
2210                 if ( (mode == MT_CITADEL) || (mode == MT_MIME) ) {
2211                         memset(&ma, 0, sizeof(struct ma_info));
2212                         mime_parser(CM_RANGE(TheMessage, eMesageText),
2213                                 (do_proto ? *list_this_part : NULL),
2214                                 (do_proto ? *list_this_pref : NULL),
2215                                 (do_proto ? *list_this_suff : NULL),
2216                                 (void *)&ma, 1);
2217                 }
2218                 else if (mode == MT_RFC822) {   /* unparsed RFC822 dump */
2219                         Dump_RFC822HeadersBody(
2220                                 TheMessage,
2221                                 headers_only,
2222                                 flags,
2223                                 nl);
2224                         goto DONE;
2225                 }
2226         }
2227
2228         if (headers_only == HEADERS_ONLY) {
2229                 goto DONE;
2230         }
2231
2232         /* signify start of msg text */
2233         if ( (mode == MT_CITADEL) || (mode == MT_MIME) ) {
2234                 if (do_proto) cprintf("text\n");
2235         }
2236
2237         if (TheMessage->cm_format_type == FMT_FIXED)
2238                 DumpFormatFixed(
2239                         TheMessage,
2240                         mode,           /* how would you like that message? */
2241                         nl);
2242
2243         /* If the message on disk is format 0 (Citadel vari-format), we
2244          * output using the formatter at 80 columns.  This is the final output
2245          * form if the transfer format is RFC822, but if the transfer format
2246          * is Citadel proprietary, it'll still work, because the indentation
2247          * for new paragraphs is correct and the client will reformat the
2248          * message to the reader's screen width.
2249          */
2250         if (TheMessage->cm_format_type == FMT_CITADEL) {
2251                 if (mode == MT_MIME) {
2252                         cprintf("Content-type: text/x-citadel-variformat\n\n");
2253                 }
2254                 memfmout(TheMessage->cm_fields[eMesageText], nl);
2255         }
2256
2257         /* If the message on disk is format 4 (MIME), we've gotta hand it
2258          * off to the MIME parser.  The client has already been told that
2259          * this message is format 1 (fixed format), so the callback function
2260          * we use will display those parts as-is.
2261          */
2262         if (TheMessage->cm_format_type == FMT_RFC822) {
2263                 memset(&ma, 0, sizeof(struct ma_info));
2264
2265                 if (mode == MT_MIME) {
2266                         ma.use_fo_hooks = 0;
2267                         strcpy(ma.chosen_part, "1");
2268                         ma.chosen_pref = 9999;
2269                         ma.dont_decode = CCC->msg4_dont_decode;
2270                         mime_parser(CM_RANGE(TheMessage, eMesageText),
2271                                     *choose_preferred, *fixed_output_pre,
2272                                     *fixed_output_post, (void *)&ma, 1);
2273                         mime_parser(CM_RANGE(TheMessage, eMesageText),
2274                                     *output_preferred, NULL, NULL, (void *)&ma, 1);
2275                 }
2276                 else {
2277                         ma.use_fo_hooks = 1;
2278                         mime_parser(CM_RANGE(TheMessage, eMesageText),
2279                                     *fixed_output, *fixed_output_pre,
2280                                     *fixed_output_post, (void *)&ma, 0);
2281                 }
2282
2283         }
2284
2285 DONE:   /* now we're done */
2286         if (do_proto) cprintf("000\n");
2287         return(om_ok);
2288 }
2289
2290 /*
2291  * Save one or more message pointers into a specified room
2292  * (Returns 0 for success, nonzero for failure)
2293  * roomname may be NULL to use the current room
2294  *
2295  * Note that the 'supplied_msg' field may be set to NULL, in which case
2296  * the message will be fetched from disk, by number, if we need to perform
2297  * replication checks.  This adds an additional database read, so if the
2298  * caller already has the message in memory then it should be supplied.  (Obviously
2299  * this mode of operation only works if we're saving a single message.)
2300  */
2301 int CtdlSaveMsgPointersInRoom(char *roomname, long newmsgidlist[], int num_newmsgs,
2302                         int do_repl_check, struct CtdlMessage *supplied_msg, int suppress_refcount_adj
2303 ) {
2304         struct CitContext *CCC = CC;
2305         int i, j, unique;
2306         char hold_rm[ROOMNAMELEN];
2307         struct cdbdata *cdbfr;
2308         int num_msgs;
2309         long *msglist;
2310         long highest_msg = 0L;
2311
2312         long msgid = 0;
2313         struct CtdlMessage *msg = NULL;
2314
2315         long *msgs_to_be_merged = NULL;
2316         int num_msgs_to_be_merged = 0;
2317
2318         MSG_syslog(LOG_DEBUG,
2319                    "CtdlSaveMsgPointersInRoom(room=%s, num_msgs=%d, repl=%d, suppress_rca=%d)\n",
2320                    roomname, num_newmsgs, do_repl_check, suppress_refcount_adj
2321         );
2322
2323         strcpy(hold_rm, CCC->room.QRname);
2324
2325         /* Sanity checks */
2326         if (newmsgidlist == NULL) return(ERROR + INTERNAL_ERROR);
2327         if (num_newmsgs < 1) return(ERROR + INTERNAL_ERROR);
2328         if (num_newmsgs > 1) supplied_msg = NULL;
2329
2330         /* Now the regular stuff */
2331         if (CtdlGetRoomLock(&CCC->room,
2332            ((roomname != NULL) ? roomname : CCC->room.QRname) )
2333            != 0) {
2334                 MSG_syslog(LOG_ERR, "No such room <%s>\n", roomname);
2335                 return(ERROR + ROOM_NOT_FOUND);
2336         }
2337
2338
2339         msgs_to_be_merged = malloc(sizeof(long) * num_newmsgs);
2340         num_msgs_to_be_merged = 0;
2341
2342
2343         cdbfr = cdb_fetch(CDB_MSGLISTS, &CCC->room.QRnumber, sizeof(long));
2344         if (cdbfr == NULL) {
2345                 msglist = NULL;
2346                 num_msgs = 0;
2347         } else {
2348                 msglist = (long *) cdbfr->ptr;
2349                 cdbfr->ptr = NULL;      /* CtdlSaveMsgPointerInRoom() now owns this memory */
2350                 num_msgs = cdbfr->len / sizeof(long);
2351                 cdb_free(cdbfr);
2352         }
2353
2354
2355         /* Create a list of msgid's which were supplied by the caller, but do
2356          * not already exist in the target room.  It is absolutely taboo to
2357          * have more than one reference to the same message in a room.
2358          */
2359         for (i=0; i<num_newmsgs; ++i) {
2360                 unique = 1;
2361                 if (num_msgs > 0) for (j=0; j<num_msgs; ++j) {
2362                         if (msglist[j] == newmsgidlist[i]) {
2363                                 unique = 0;
2364                         }
2365                 }
2366                 if (unique) {
2367                         msgs_to_be_merged[num_msgs_to_be_merged++] = newmsgidlist[i];
2368                 }
2369         }
2370
2371         MSG_syslog(LOG_DEBUG, "%d unique messages to be merged\n", num_msgs_to_be_merged);
2372
2373         /*
2374          * Now merge the new messages
2375          */
2376         msglist = realloc(msglist, (sizeof(long) * (num_msgs + num_msgs_to_be_merged)) );
2377         if (msglist == NULL) {
2378                 MSGM_syslog(LOG_ALERT, "ERROR: can't realloc message list!\n");
2379                 free(msgs_to_be_merged);
2380                 return (ERROR + INTERNAL_ERROR);
2381         }
2382         memcpy(&msglist[num_msgs], msgs_to_be_merged, (sizeof(long) * num_msgs_to_be_merged) );
2383         num_msgs += num_msgs_to_be_merged;
2384
2385         /* Sort the message list, so all the msgid's are in order */
2386         num_msgs = sort_msglist(msglist, num_msgs);
2387
2388         /* Determine the highest message number */
2389         highest_msg = msglist[num_msgs - 1];
2390
2391         /* Write it back to disk. */
2392         cdb_store(CDB_MSGLISTS, &CCC->room.QRnumber, (int)sizeof(long),
2393                   msglist, (int)(num_msgs * sizeof(long)));
2394
2395         /* Free up the memory we used. */
2396         free(msglist);
2397
2398         /* Update the highest-message pointer and unlock the room. */
2399         CCC->room.QRhighest = highest_msg;
2400         CtdlPutRoomLock(&CCC->room);
2401
2402         /* Perform replication checks if necessary */
2403         if ( (DoesThisRoomNeedEuidIndexing(&CCC->room)) && (do_repl_check) ) {
2404                 MSGM_syslog(LOG_DEBUG, "CtdlSaveMsgPointerInRoom() doing repl checks\n");
2405
2406                 for (i=0; i<num_msgs_to_be_merged; ++i) {
2407                         msgid = msgs_to_be_merged[i];
2408
2409                         if (supplied_msg != NULL) {
2410                                 msg = supplied_msg;
2411                         }
2412                         else {
2413                                 msg = CtdlFetchMessage(msgid, 0);
2414                         }
2415
2416                         if (msg != NULL) {
2417                                 ReplicationChecks(msg);
2418
2419                                 /* If the message has an Exclusive ID, index that... */
2420                                 if (!CM_IsEmpty(msg, eExclusiveID)) {
2421                                         index_message_by_euid(msg->cm_fields[eExclusiveID], &CCC->room, msgid);
2422                                 }
2423
2424                                 /* Free up the memory we may have allocated */
2425                                 if (msg != supplied_msg) {
2426                                         CM_Free(msg);
2427                                 }
2428                         }
2429
2430                 }
2431         }
2432
2433         else {
2434                 MSGM_syslog(LOG_DEBUG, "CtdlSaveMsgPointerInRoom() skips repl checks\n");
2435         }
2436
2437         /* Submit this room for processing by hooks */
2438         PerformRoomHooks(&CCC->room);
2439
2440         /* Go back to the room we were in before we wandered here... */
2441         CtdlGetRoom(&CCC->room, hold_rm);
2442
2443         /* Bump the reference count for all messages which were merged */
2444         if (!suppress_refcount_adj) {
2445                 AdjRefCountList(msgs_to_be_merged, num_msgs_to_be_merged, +1);
2446         }
2447
2448         /* Free up memory... */
2449         if (msgs_to_be_merged != NULL) {
2450                 free(msgs_to_be_merged);
2451         }
2452
2453         /* Return success. */
2454         return (0);
2455 }
2456
2457
2458 /*
2459  * This is the same as CtdlSaveMsgPointersInRoom() but it only accepts
2460  * a single message.
2461  */
2462 int CtdlSaveMsgPointerInRoom(char *roomname, long msgid,
2463                              int do_repl_check, struct CtdlMessage *supplied_msg)
2464 {
2465         return CtdlSaveMsgPointersInRoom(roomname, &msgid, 1, do_repl_check, supplied_msg, 0);
2466 }
2467
2468
2469
2470
2471 /*
2472  * Message base operation to save a new message to the message store
2473  * (returns new message number)
2474  *
2475  * This is the back end for CtdlSubmitMsg() and should not be directly
2476  * called by server-side modules.
2477  *
2478  */
2479 long send_message(struct CtdlMessage *msg) {
2480         struct CitContext *CCC = CC;
2481         long newmsgid;
2482         long retval;
2483         char msgidbuf[256];
2484         long msgidbuflen;
2485         struct ser_ret smr;
2486         int is_bigmsg = 0;
2487         char *holdM = NULL;
2488         long holdMLen = 0;
2489
2490         /* Get a new message number */
2491         newmsgid = get_new_message_number();
2492         msgidbuflen = snprintf(msgidbuf, sizeof msgidbuf, "%08lX-%08lX@%s",
2493                                (long unsigned int) time(NULL),
2494                                (long unsigned int) newmsgid,
2495                                config.c_fqdn
2496                 );
2497
2498         /* Generate an ID if we don't have one already */
2499         if (CM_IsEmpty(msg, emessageId)) {
2500                 CM_SetField(msg, emessageId, msgidbuf, msgidbuflen);
2501         }
2502
2503         /* If the message is big, set its body aside for storage elsewhere */
2504         if (!CM_IsEmpty(msg, eMesageText)) {
2505                 if (msg->cm_lengths[eMesageText] > BIGMSG) {
2506                         is_bigmsg = 1;
2507                         holdM = msg->cm_fields[eMesageText];
2508                         msg->cm_fields[eMesageText] = NULL;
2509                         holdMLen = msg->cm_lengths[eMesageText];
2510                         msg->cm_lengths[eMesageText] = 0;
2511                 }
2512         }
2513
2514         /* Serialize our data structure for storage in the database */
2515         CtdlSerializeMessage(&smr, msg);
2516
2517         if (is_bigmsg) {
2518                 msg->cm_fields[eMesageText] = holdM;
2519                 msg->cm_lengths[eMesageText] = holdMLen;
2520         }
2521
2522         if (smr.len == 0) {
2523                 cprintf("%d Unable to serialize message\n",
2524                         ERROR + INTERNAL_ERROR);
2525                 return (-1L);
2526         }
2527
2528         /* Write our little bundle of joy into the message base */
2529         if (cdb_store(CDB_MSGMAIN, &newmsgid, (int)sizeof(long),
2530                       smr.ser, smr.len) < 0) {
2531                 MSGM_syslog(LOG_ERR, "Can't store message\n");
2532                 retval = 0L;
2533         } else {
2534                 if (is_bigmsg) {
2535                         cdb_store(CDB_BIGMSGS,
2536                                   &newmsgid,
2537                                   (int)sizeof(long),
2538                                   holdM,
2539                                   (holdMLen + 1)
2540                                 );
2541                 }
2542                 retval = newmsgid;
2543         }
2544
2545         /* Free the memory we used for the serialized message */
2546         free(smr.ser);
2547
2548         /* Return the *local* message ID to the caller
2549          * (even if we're storing an incoming network message)
2550          */
2551         return(retval);
2552 }
2553
2554
2555
2556 /*
2557  * Serialize a struct CtdlMessage into the format used on disk and network.
2558  *
2559  * This function loads up a "struct ser_ret" (defined in server.h) which
2560  * contains the length of the serialized message and a pointer to the
2561  * serialized message in memory.  THE LATTER MUST BE FREED BY THE CALLER.
2562  */
2563 void CtdlSerializeMessage(struct ser_ret *ret,          /* return values */
2564                        struct CtdlMessage *msg) /* unserialized msg */
2565 {
2566         struct CitContext *CCC = CC;
2567         size_t wlen;
2568         int i;
2569
2570         /*
2571          * Check for valid message format
2572          */
2573         if (CM_IsValidMsg(msg) == 0) {
2574                 MSGM_syslog(LOG_ERR, "CtdlSerializeMessage() aborting due to invalid message\n");
2575                 ret->len = 0;
2576                 ret->ser = NULL;
2577                 return;
2578         }
2579
2580         ret->len = 3;
2581         for (i=0; i < NDiskFields; ++i)
2582                 if (msg->cm_fields[FieldOrder[i]] != NULL)
2583                         ret->len += msg->cm_lengths[FieldOrder[i]] + 2;
2584
2585         ret->ser = malloc(ret->len);
2586         if (ret->ser == NULL) {
2587                 MSG_syslog(LOG_ERR, "CtdlSerializeMessage() malloc(%ld) failed: %s\n",
2588                            (long)ret->len, strerror(errno));
2589                 ret->len = 0;
2590                 ret->ser = NULL;
2591                 return;
2592         }
2593
2594         ret->ser[0] = 0xFF;
2595         ret->ser[1] = msg->cm_anon_type;
2596         ret->ser[2] = msg->cm_format_type;
2597         wlen = 3;
2598
2599         for (i=0; i < NDiskFields; ++i)
2600                 if (msg->cm_fields[FieldOrder[i]] != NULL)
2601                 {
2602                         ret->ser[wlen++] = (char)FieldOrder[i];
2603
2604                         memcpy(&ret->ser[wlen],
2605                                msg->cm_fields[FieldOrder[i]],
2606                                msg->cm_lengths[FieldOrder[i]] + 1);
2607
2608                         wlen = wlen + msg->cm_lengths[FieldOrder[i]] + 1;
2609                 }
2610
2611         if (ret->len != wlen) {
2612                 MSG_syslog(LOG_ERR, "ERROR: len=%ld wlen=%ld\n",
2613                            (long)ret->len, (long)wlen);
2614         }
2615
2616         return;
2617 }
2618
2619
2620 /*
2621  * Check to see if any messages already exist in the current room which
2622  * carry the same Exclusive ID as this one.  If any are found, delete them.
2623  */
2624 void ReplicationChecks(struct CtdlMessage *msg) {
2625         struct CitContext *CCC = CC;
2626         long old_msgnum = (-1L);
2627
2628         if (DoesThisRoomNeedEuidIndexing(&CCC->room) == 0) return;
2629
2630         MSG_syslog(LOG_DEBUG, "Performing replication checks in <%s>\n",
2631                    CCC->room.QRname);
2632
2633         /* No exclusive id?  Don't do anything. */
2634         if (msg == NULL) return;
2635         if (CM_IsEmpty(msg, eExclusiveID)) return;
2636
2637         /*MSG_syslog(LOG_DEBUG, "Exclusive ID: <%s> for room <%s>\n",
2638           msg->cm_fields[eExclusiveID], CCC->room.QRname);*/
2639
2640         old_msgnum = CtdlLocateMessageByEuid(msg->cm_fields[eExclusiveID], &CCC->room);
2641         if (old_msgnum > 0L) {
2642                 MSG_syslog(LOG_DEBUG, "ReplicationChecks() replacing message %ld\n", old_msgnum);
2643                 CtdlDeleteMessages(CCC->room.QRname, &old_msgnum, 1, "");
2644         }
2645 }
2646
2647
2648
2649 /*
2650  * Save a message to disk and submit it into the delivery system.
2651  */
2652 long CtdlSubmitMsg(struct CtdlMessage *msg,     /* message to save */
2653                    recptypes *recps,            /* recipients (if mail) */
2654                    const char *force,           /* force a particular room? */
2655                    int flags                    /* should the message be exported clean? */
2656         )
2657 {
2658         char hold_rm[ROOMNAMELEN];
2659         char actual_rm[ROOMNAMELEN];
2660         char force_room[ROOMNAMELEN];
2661         char content_type[SIZ];                 /* We have to learn this */
2662         char recipient[SIZ];
2663         char bounce_to[1024];
2664         const char *room;
2665         long newmsgid;
2666         const char *mptr = NULL;
2667         struct ctdluser userbuf;
2668         int a, i;
2669         struct MetaData smi;
2670         char *collected_addresses = NULL;
2671         struct addresses_to_be_filed *aptr = NULL;
2672         StrBuf *saved_rfc822_version = NULL;
2673         int qualified_for_journaling = 0;
2674         CitContext *CCC = MyContext();
2675
2676         MSGM_syslog(LOG_DEBUG, "CtdlSubmitMsg() called\n");
2677         if (CM_IsValidMsg(msg) == 0) return(-1);        /* self check */
2678
2679         /* If this message has no timestamp, we take the liberty of
2680          * giving it one, right now.
2681          */
2682         if (CM_IsEmpty(msg, eTimestamp)) {
2683                 CM_SetFieldLONG(msg, eTimestamp, time(NULL));
2684         }
2685
2686         /* If this message has no path, we generate one.
2687          */
2688         if (CM_IsEmpty(msg, eMessagePath)) {
2689                 if (!CM_IsEmpty(msg, eAuthor)) {
2690                         CM_CopyField(msg, eMessagePath, eAuthor);
2691                         for (a=0; !IsEmptyStr(&msg->cm_fields[eMessagePath][a]); ++a) {
2692                                 if (isspace(msg->cm_fields[eMessagePath][a])) {
2693                                         msg->cm_fields[eMessagePath][a] = ' ';
2694                                 }
2695                         }
2696                 }
2697                 else {
2698                         CM_SetField(msg, eMessagePath, HKEY("unknown"));
2699                 }
2700         }
2701
2702         if (force == NULL) {
2703                 force_room[0] = '\0';
2704         }
2705         else {
2706                 strcpy(force_room, force);
2707         }
2708
2709         /* Learn about what's inside, because it's what's inside that counts */
2710         if (CM_IsEmpty(msg, eMesageText)) {
2711                 MSGM_syslog(LOG_ERR, "ERROR: attempt to save message with NULL body\n");
2712                 return(-2);
2713         }
2714
2715         switch (msg->cm_format_type) {
2716         case 0:
2717                 strcpy(content_type, "text/x-citadel-variformat");
2718                 break;
2719         case 1:
2720                 strcpy(content_type, "text/plain");
2721                 break;
2722         case 4:
2723                 strcpy(content_type, "text/plain");
2724                 mptr = bmstrcasestr(msg->cm_fields[eMesageText], "Content-type:");
2725                 if (mptr != NULL) {
2726                         char *aptr;
2727                         safestrncpy(content_type, &mptr[13], sizeof content_type);
2728                         striplt(content_type);
2729                         aptr = content_type;
2730                         while (!IsEmptyStr(aptr)) {
2731                                 if ((*aptr == ';')
2732                                     || (*aptr == ' ')
2733                                     || (*aptr == 13)
2734                                     || (*aptr == 10)) {
2735                                         *aptr = 0;
2736                                 }
2737                                 else aptr++;
2738                         }
2739                 }
2740         }
2741
2742         /* Goto the correct room */
2743         room = (recps) ? CCC->room.QRname : SENTITEMS;
2744         MSG_syslog(LOG_DEBUG, "Selected room %s\n", room);
2745         strcpy(hold_rm, CCC->room.QRname);
2746         strcpy(actual_rm, CCC->room.QRname);
2747         if (recps != NULL) {
2748                 strcpy(actual_rm, SENTITEMS);
2749         }
2750
2751         /* If the user is a twit, move to the twit room for posting */
2752         if (TWITDETECT) {
2753                 if (CCC->user.axlevel == AxProbU) {
2754                         strcpy(hold_rm, actual_rm);
2755                         strcpy(actual_rm, config.c_twitroom);
2756                         MSGM_syslog(LOG_DEBUG, "Diverting to twit room\n");
2757                 }
2758         }
2759
2760         /* ...or if this message is destined for Aide> then go there. */
2761         if (!IsEmptyStr(force_room)) {
2762                 strcpy(actual_rm, force_room);
2763         }
2764
2765         MSG_syslog(LOG_INFO, "Final selection: %s (%s)\n", actual_rm, room);
2766         if (strcasecmp(actual_rm, CCC->room.QRname)) {
2767                 /* CtdlGetRoom(&CCC->room, actual_rm); */
2768                 CtdlUserGoto(actual_rm, 0, 1, NULL, NULL);
2769         }
2770
2771         /*
2772          * If this message has no O (room) field, generate one.
2773          */
2774         if (CM_IsEmpty(msg, eOriginalRoom)) {
2775                 CM_SetField(msg, eOriginalRoom, CCC->room.QRname, strlen(CCC->room.QRname));
2776         }
2777
2778         /* Perform "before save" hooks (aborting if any return nonzero) */
2779         MSGM_syslog(LOG_DEBUG, "Performing before-save hooks\n");
2780         if (PerformMessageHooks(msg, recps, EVT_BEFORESAVE) > 0) return(-3);
2781
2782         /*
2783          * If this message has an Exclusive ID, and the room is replication
2784          * checking enabled, then do replication checks.
2785          */
2786         if (DoesThisRoomNeedEuidIndexing(&CCC->room)) {
2787                 ReplicationChecks(msg);
2788         }
2789
2790         /* Save it to disk */
2791         MSGM_syslog(LOG_DEBUG, "Saving to disk\n");
2792         newmsgid = send_message(msg);
2793         if (newmsgid <= 0L) return(-5);
2794
2795         /* Write a supplemental message info record.  This doesn't have to
2796          * be a critical section because nobody else knows about this message
2797          * yet.
2798          */
2799         MSGM_syslog(LOG_DEBUG, "Creating MetaData record\n");
2800         memset(&smi, 0, sizeof(struct MetaData));
2801         smi.meta_msgnum = newmsgid;
2802         smi.meta_refcount = 0;
2803         safestrncpy(smi.meta_content_type, content_type,
2804                     sizeof smi.meta_content_type);
2805
2806         /*
2807          * Measure how big this message will be when rendered as RFC822.
2808          * We do this for two reasons:
2809          * 1. We need the RFC822 length for the new metadata record, so the
2810          *    POP and IMAP services don't have to calculate message lengths
2811          *    while the user is waiting (multiplied by potentially hundreds
2812          *    or thousands of messages).
2813          * 2. If journaling is enabled, we will need an RFC822 version of the
2814          *    message to attach to the journalized copy.
2815          */
2816         if (CCC->redirect_buffer != NULL) {
2817                 MSGM_syslog(LOG_ALERT, "CCC->redirect_buffer is not NULL during message submission!\n");
2818                 abort();
2819         }
2820         CCC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
2821         CtdlOutputPreLoadedMsg(msg, MT_RFC822, HEADERS_ALL, 0, 1, QP_EADDR);
2822         smi.meta_rfc822_length = StrLength(CCC->redirect_buffer);
2823         saved_rfc822_version = CCC->redirect_buffer;
2824         CCC->redirect_buffer = NULL;
2825
2826         PutMetaData(&smi);
2827
2828         /* Now figure out where to store the pointers */
2829         MSGM_syslog(LOG_DEBUG, "Storing pointers\n");
2830
2831         /* If this is being done by the networker delivering a private
2832          * message, we want to BYPASS saving the sender's copy (because there
2833          * is no local sender; it would otherwise go to the Trashcan).
2834          */
2835         if ((!CCC->internal_pgm) || (recps == NULL)) {
2836                 if (CtdlSaveMsgPointerInRoom(actual_rm, newmsgid, 1, msg) != 0) {
2837                         MSGM_syslog(LOG_ERR, "ERROR saving message pointer!\n");
2838                         CtdlSaveMsgPointerInRoom(config.c_aideroom, newmsgid, 0, msg);
2839                 }
2840         }
2841
2842         /* For internet mail, drop a copy in the outbound queue room */
2843         if ((recps != NULL) && (recps->num_internet > 0)) {
2844                 CtdlSaveMsgPointerInRoom(SMTP_SPOOLOUT_ROOM, newmsgid, 0, msg);
2845         }
2846
2847         /* If other rooms are specified, drop them there too. */
2848         if ((recps != NULL) && (recps->num_room > 0))
2849                 for (i=0; i<num_tokens(recps->recp_room, '|'); ++i) {
2850                         extract_token(recipient, recps->recp_room, i,
2851                                       '|', sizeof recipient);
2852                         MSG_syslog(LOG_DEBUG, "Delivering to room <%s>\n", recipient);///// xxxx
2853                         CtdlSaveMsgPointerInRoom(recipient, newmsgid, 0, msg);
2854                 }
2855
2856         /* Bump this user's messages posted counter. */
2857         MSGM_syslog(LOG_DEBUG, "Updating user\n");
2858         CtdlGetUserLock(&CCC->user, CCC->curr_user);
2859         CCC->user.posted = CCC->user.posted + 1;
2860         CtdlPutUserLock(&CCC->user);
2861
2862         /* Decide where bounces need to be delivered */
2863         if ((recps != NULL) && (recps->bounce_to == NULL))
2864         {
2865                 if (CCC->logged_in)
2866                         snprintf(bounce_to, sizeof bounce_to, "%s@%s",
2867                                  CCC->user.fullname, config.c_nodename);
2868                 else
2869                         snprintf(bounce_to, sizeof bounce_to, "%s@%s",
2870                                  msg->cm_fields[eAuthor], msg->cm_fields[eNodeName]);
2871                 recps->bounce_to = bounce_to;
2872         }
2873
2874         CM_SetFieldLONG(msg, eVltMsgNum, newmsgid);
2875
2876
2877         /* If this is private, local mail, make a copy in the
2878          * recipient's mailbox and bump the reference count.
2879          */
2880         if ((recps != NULL) && (recps->num_local > 0))
2881         {
2882                 char *pch;
2883                 int ntokens;
2884
2885                 pch = recps->recp_local;
2886                 recps->recp_local = recipient;
2887                 ntokens = num_tokens(pch, '|');
2888                 for (i=0; i<ntokens; ++i)
2889                 {
2890                         extract_token(recipient, pch, i, '|', sizeof recipient);
2891                         MSG_syslog(LOG_DEBUG, "Delivering private local mail to <%s>\n", recipient);
2892                         if (CtdlGetUser(&userbuf, recipient) == 0) {
2893                                 CtdlMailboxName(actual_rm, sizeof actual_rm, &userbuf, MAILROOM);
2894                                 CtdlSaveMsgPointerInRoom(actual_rm, newmsgid, 0, msg);
2895                                 CtdlBumpNewMailCounter(userbuf.usernum);
2896                                 PerformMessageHooks(msg, recps, EVT_AFTERUSRMBOXSAVE);
2897                         }
2898                         else {
2899                                 MSG_syslog(LOG_DEBUG, "No user <%s>\n", recipient);
2900                                 CtdlSaveMsgPointerInRoom(config.c_aideroom, newmsgid, 0, msg);
2901                         }
2902                 }
2903                 recps->recp_local = pch;
2904         }
2905
2906         /* Perform "after save" hooks */
2907         MSGM_syslog(LOG_DEBUG, "Performing after-save hooks\n");
2908
2909         PerformMessageHooks(msg, recps, EVT_AFTERSAVE);
2910         CM_FlushField(msg, eVltMsgNum);
2911
2912         /* Go back to the room we started from */
2913         MSG_syslog(LOG_DEBUG, "Returning to original room %s\n", hold_rm);
2914         if (strcasecmp(hold_rm, CCC->room.QRname))
2915                 CtdlUserGoto(hold_rm, 0, 1, NULL, NULL);
2916
2917         /*
2918          * Any addresses to harvest for someone's address book?
2919          */
2920         if ( (CCC->logged_in) && (recps != NULL) ) {
2921                 collected_addresses = harvest_collected_addresses(msg);
2922         }
2923
2924         if (collected_addresses != NULL) {
2925                 aptr = (struct addresses_to_be_filed *)
2926                         malloc(sizeof(struct addresses_to_be_filed));
2927                 CtdlMailboxName(actual_rm, sizeof actual_rm,
2928                                 &CCC->user, USERCONTACTSROOM);
2929                 aptr->roomname = strdup(actual_rm);
2930                 aptr->collected_addresses = collected_addresses;
2931                 begin_critical_section(S_ATBF);
2932                 aptr->next = atbf;
2933                 atbf = aptr;
2934                 end_critical_section(S_ATBF);
2935         }
2936
2937         /*
2938          * Determine whether this message qualifies for journaling.
2939          */
2940         if (!CM_IsEmpty(msg, eJournal)) {
2941                 qualified_for_journaling = 0;
2942         }
2943         else {
2944                 if (recps == NULL) {
2945                         qualified_for_journaling = config.c_journal_pubmsgs;
2946                 }
2947                 else if (recps->num_local + recps->num_ignet + recps->num_internet > 0) {
2948                         qualified_for_journaling = config.c_journal_email;
2949                 }
2950                 else {
2951                         qualified_for_journaling = config.c_journal_pubmsgs;
2952                 }
2953         }
2954
2955         /*
2956          * Do we have to perform journaling?  If so, hand off the saved
2957          * RFC822 version will be handed off to the journaler for background
2958          * submit.  Otherwise, we have to free the memory ourselves.
2959          */
2960         if (saved_rfc822_version != NULL) {
2961                 if (qualified_for_journaling) {
2962                         JournalBackgroundSubmit(msg, saved_rfc822_version, recps);
2963                 }
2964                 else {
2965                         FreeStrBuf(&saved_rfc822_version);
2966                 }
2967         }
2968
2969         if ((recps != NULL) && (recps->bounce_to == bounce_to))
2970                 recps->bounce_to = NULL;
2971
2972         /* Done. */
2973         return(newmsgid);
2974 }
2975
2976
2977 /*
2978  * Convenience function for generating small administrative messages.
2979  */
2980 void quickie_message(const char *from,
2981                      const char *fromaddr,
2982                      const char *to,
2983                      char *room,
2984                      const char *text,
2985                      int format_type,
2986                      const char *subject)
2987 {
2988         struct CtdlMessage *msg;
2989         recptypes *recp = NULL;
2990
2991         msg = malloc(sizeof(struct CtdlMessage));
2992         memset(msg, 0, sizeof(struct CtdlMessage));
2993         msg->cm_magic = CTDLMESSAGE_MAGIC;
2994         msg->cm_anon_type = MES_NORMAL;
2995         msg->cm_format_type = format_type;
2996
2997         if (from != NULL) {
2998                 CM_SetField(msg, eAuthor, from, strlen(from));
2999         }
3000         else if (fromaddr != NULL) {
3001                 char *pAt;
3002                 CM_SetField(msg, eAuthor, fromaddr, strlen(fromaddr));
3003                 pAt = strchr(msg->cm_fields[eAuthor], '@');
3004                 if (pAt != NULL) {
3005                         CM_CutFieldAt(msg, eAuthor, pAt - msg->cm_fields[eAuthor]);
3006                 }
3007         }
3008         else {
3009                 msg->cm_fields[eAuthor] = strdup("Citadel");
3010         }
3011
3012         if (fromaddr != NULL) CM_SetField(msg, erFc822Addr, fromaddr, strlen(fromaddr));
3013         if (room != NULL) CM_SetField(msg, eOriginalRoom, room, strlen(room));
3014         CM_SetField(msg, eNodeName, CFG_KEY(c_nodename));
3015         if (to != NULL) {
3016                 CM_SetField(msg, eRecipient, to, strlen(to));
3017                 recp = validate_recipients(to, NULL, 0);
3018         }
3019         if (subject != NULL) {
3020                 CM_SetField(msg, eMsgSubject, subject, strlen(subject));
3021         }
3022         CM_SetField(msg, eMesageText, text, strlen(text));
3023
3024         CtdlSubmitMsg(msg, recp, room, 0);
3025         CM_Free(msg);
3026         if (recp != NULL) free_recipients(recp);
3027 }
3028
3029 void flood_protect_quickie_message(const char *from,
3030                                    const char *fromaddr,
3031                                    const char *to,
3032                                    char *room,
3033                                    const char *text,
3034                                    int format_type,
3035                                    const char *subject,
3036                                    int nCriterions,
3037                                    const char **CritStr,
3038                                    long *CritStrLen,
3039                                    long ccid,
3040                                    long ioid,
3041                                    time_t NOW)
3042 {
3043         int i;
3044         u_char rawdigest[MD5_DIGEST_LEN];
3045         struct MD5Context md5context;
3046         StrBuf *guid;
3047         char timestamp[64];
3048         long tslen;
3049         time_t tsday = NOW / (8*60*60); /* just care for a day... */
3050
3051         tslen = snprintf(timestamp, sizeof(timestamp), "%ld", tsday);
3052         MD5Init(&md5context);
3053
3054         for (i = 0; i < nCriterions; i++)
3055                 MD5Update(&md5context,
3056                           (const unsigned char*)CritStr[i], CritStrLen[i]);
3057         MD5Update(&md5context,
3058                   (const unsigned char*)timestamp, tslen);
3059         MD5Final(rawdigest, &md5context);
3060
3061         guid = NewStrBufPlain(NULL,
3062                               MD5_DIGEST_LEN * 2 + 12);
3063         StrBufHexEscAppend(guid, NULL, rawdigest, MD5_DIGEST_LEN);
3064         StrBufAppendBufPlain(guid, HKEY("_fldpt"), 0);
3065         if (StrLength(guid) > 40)
3066                 StrBufCutAt(guid, 40, NULL);
3067
3068         if (CheckIfAlreadySeen("FPAideMessage",
3069                                guid,
3070                                NOW,
3071                                tsday,
3072                                eUpdate,
3073                                ccid,
3074                                ioid)!= 0)
3075         {
3076                 FreeStrBuf(&guid);
3077                 /* yes, we did. flood protection kicks in. */
3078                 syslog(LOG_DEBUG,
3079                        "not sending message again\n");
3080                 return;
3081         }
3082         FreeStrBuf(&guid);
3083         /* no, this message isn't sent recently; go ahead. */
3084         quickie_message(from,
3085                         fromaddr,
3086                         to,
3087                         room,
3088                         text,
3089                         format_type,
3090                         subject);
3091 }
3092
3093
3094 /*
3095  * Back end function used by CtdlMakeMessage() and similar functions
3096  */
3097 StrBuf *CtdlReadMessageBodyBuf(char *terminator,        /* token signalling EOT */
3098                                long tlen,
3099                                size_t maxlen,           /* maximum message length */
3100                                StrBuf *exist,           /* if non-null, append to it;
3101                                                            exist is ALWAYS freed  */
3102                                int crlf,                /* CRLF newlines instead of LF */
3103                                int *sock                /* socket handle or 0 for this session's client socket */
3104         )
3105 {
3106         StrBuf *Message;
3107         StrBuf *LineBuf;
3108         int flushing = 0;
3109         int finished = 0;
3110         int dotdot = 0;
3111
3112         LineBuf = NewStrBufPlain(NULL, SIZ);
3113         if (exist == NULL) {
3114                 Message = NewStrBufPlain(NULL, 4 * SIZ);
3115         }
3116         else {
3117                 Message = NewStrBufDup(exist);
3118         }
3119
3120         /* Do we need to change leading ".." to "." for SMTP escaping? */
3121         if ((tlen == 1) && (*terminator == '.')) {
3122                 dotdot = 1;
3123         }
3124
3125         /* read in the lines of message text one by one */
3126         do {
3127                 if (sock != NULL) {
3128                         if ((CtdlSockGetLine(sock, LineBuf, 5) < 0) ||
3129                             (*sock == -1))
3130                                 finished = 1;
3131                 }
3132                 else {
3133                         if (CtdlClientGetLine(LineBuf) < 0) finished = 1;
3134                 }
3135                 if ((StrLength(LineBuf) == tlen) &&
3136                     (!strcmp(ChrPtr(LineBuf), terminator)))
3137                         finished = 1;
3138
3139                 if ( (!flushing) && (!finished) ) {
3140                         if (crlf) {
3141                                 StrBufAppendBufPlain(LineBuf, HKEY("\r\n"), 0);
3142                         }
3143                         else {
3144                                 StrBufAppendBufPlain(LineBuf, HKEY("\n"), 0);
3145                         }
3146
3147                         /* Unescape SMTP-style input of two dots at the beginning of the line */
3148                         if ((dotdot) &&
3149                             (StrLength(LineBuf) == 2) &&
3150                             (!strcmp(ChrPtr(LineBuf), "..")))
3151                         {
3152                                 StrBufCutLeft(LineBuf, 1);
3153                         }
3154
3155                         StrBufAppendBuf(Message, LineBuf, 0);
3156                 }
3157
3158                 /* if we've hit the max msg length, flush the rest */
3159                 if (StrLength(Message) >= maxlen) flushing = 1;
3160
3161         } while (!finished);
3162         FreeStrBuf(&LineBuf);
3163         return Message;
3164 }
3165
3166 void DeleteAsyncMsg(ReadAsyncMsg **Msg)
3167 {
3168         if (*Msg == NULL)
3169                 return;
3170         FreeStrBuf(&(*Msg)->MsgBuf);
3171
3172         free(*Msg);
3173         *Msg = NULL;
3174 }
3175
3176 ReadAsyncMsg *NewAsyncMsg(const char *terminator,       /* token signalling EOT */
3177                           long tlen,
3178                           size_t maxlen,                /* maximum message length */
3179                           size_t expectlen,             /* if we expect a message, how long should it be? */
3180                           StrBuf *exist,                /* if non-null, append to it;
3181                                                            exist is ALWAYS freed  */
3182                           long eLen,                    /* length of exist */
3183                           int crlf                      /* CRLF newlines instead of LF */
3184         )
3185 {
3186         ReadAsyncMsg *NewMsg;
3187
3188         NewMsg = (ReadAsyncMsg *)malloc(sizeof(ReadAsyncMsg));
3189         memset(NewMsg, 0, sizeof(ReadAsyncMsg));
3190
3191         if (exist == NULL) {
3192                 long len;
3193
3194                 if (expectlen == 0) {
3195                         len = 4 * SIZ;
3196                 }
3197                 else {
3198                         len = expectlen + 10;
3199                 }
3200                 NewMsg->MsgBuf = NewStrBufPlain(NULL, len);
3201         }
3202         else {
3203                 NewMsg->MsgBuf = NewStrBufDup(exist);
3204         }
3205         /* Do we need to change leading ".." to "." for SMTP escaping? */
3206         if ((tlen == 1) && (*terminator == '.')) {
3207                 NewMsg->dodot = 1;
3208         }
3209
3210         NewMsg->terminator = terminator;
3211         NewMsg->tlen = tlen;
3212
3213         NewMsg->maxlen = maxlen;
3214
3215         NewMsg->crlf = crlf;
3216
3217         return NewMsg;
3218 }
3219
3220 /*
3221  * Back end function used by CtdlMakeMessage() and similar functions
3222  */
3223 eReadState CtdlReadMessageBodyAsync(AsyncIO *IO)
3224 {
3225         ReadAsyncMsg *ReadMsg;
3226         int MsgFinished = 0;
3227         eReadState Finished = eMustReadMore;
3228
3229 #ifdef BIGBAD_IODBG
3230         char fn [SIZ];
3231         FILE *fd;
3232         const char *pch = ChrPtr(IO->SendBuf.Buf);
3233         const char *pchh = IO->SendBuf.ReadWritePointer;
3234         long nbytes;
3235
3236         if (pchh == NULL)
3237                 pchh = pch;
3238
3239         nbytes = StrLength(IO->SendBuf.Buf) - (pchh - pch);
3240         snprintf(fn, SIZ, "/tmp/foolog_ev_%s.%d",
3241                  ((CitContext*)(IO->CitContext))->ServiceName,
3242                  IO->SendBuf.fd);
3243
3244         fd = fopen(fn, "a+");
3245 #endif
3246
3247         ReadMsg = IO->ReadMsg;
3248
3249         /* read in the lines of message text one by one */
3250         do {
3251                 Finished = StrBufChunkSipLine(IO->IOBuf, &IO->RecvBuf);
3252
3253                 switch (Finished) {
3254                 case eMustReadMore: /// read new from socket...
3255 #ifdef BIGBAD_IODBG
3256                         if (IO->RecvBuf.ReadWritePointer != NULL) {
3257                                 nbytes = StrLength(IO->RecvBuf.Buf) - (IO->RecvBuf.ReadWritePointer - ChrPtr(IO->RecvBuf.Buf));
3258                                 fprintf(fd, "Read; Line unfinished: %ld Bytes still in buffer [", nbytes);
3259
3260                                 fwrite(IO->RecvBuf.ReadWritePointer, nbytes, 1, fd);
3261
3262                                 fprintf(fd, "]\n");
3263                         } else {
3264                                 fprintf(fd, "BufferEmpty! \n");
3265                         }
3266                         fclose(fd);
3267 #endif
3268                         return Finished;
3269                     break;
3270                 case eBufferNotEmpty: /* shouldn't happen... */
3271                 case eReadSuccess: /// done for now...
3272                     break;
3273                 case eReadFail: /// WHUT?
3274                     ///todo: shut down!
3275                         break;
3276                 }
3277
3278
3279                 if ((StrLength(IO->IOBuf) == ReadMsg->tlen) &&
3280                     (!strcmp(ChrPtr(IO->IOBuf), ReadMsg->terminator))) {
3281                         MsgFinished = 1;
3282 #ifdef BIGBAD_IODBG
3283                         fprintf(fd, "found Terminator; Message Size: %d\n", StrLength(ReadMsg->MsgBuf));
3284 #endif
3285                 }
3286                 else if (!ReadMsg->flushing) {
3287
3288 #ifdef BIGBAD_IODBG
3289                         fprintf(fd, "Read Line: [%d][%s]\n", StrLength(IO->IOBuf), ChrPtr(IO->IOBuf));
3290 #endif
3291
3292                         /* Unescape SMTP-style input of two dots at the beginning of the line */
3293                         if ((ReadMsg->dodot) &&
3294                             (StrLength(IO->IOBuf) == 2) &&  /* TODO: do we just unescape lines with two dots or any line? */
3295                             (!strcmp(ChrPtr(IO->IOBuf), "..")))
3296                         {
3297 #ifdef BIGBAD_IODBG
3298                                 fprintf(fd, "UnEscaped!\n");
3299 #endif
3300                                 StrBufCutLeft(IO->IOBuf, 1);
3301                         }
3302
3303                         if (ReadMsg->crlf) {
3304                                 StrBufAppendBufPlain(IO->IOBuf, HKEY("\r\n"), 0);
3305                         }
3306                         else {
3307                                 StrBufAppendBufPlain(IO->IOBuf, HKEY("\n"), 0);
3308                         }
3309
3310                         StrBufAppendBuf(ReadMsg->MsgBuf, IO->IOBuf, 0);
3311                 }
3312
3313                 /* if we've hit the max msg length, flush the rest */
3314                 if (StrLength(ReadMsg->MsgBuf) >= ReadMsg->maxlen) ReadMsg->flushing = 1;
3315
3316         } while (!MsgFinished);
3317
3318 #ifdef BIGBAD_IODBG
3319         fprintf(fd, "Done with reading; %s.\n, ",
3320                 (MsgFinished)?"Message Finished": "FAILED");
3321         fclose(fd);
3322 #endif
3323         if (MsgFinished)
3324                 return eReadSuccess;
3325         else
3326                 return eAbort;
3327 }
3328
3329
3330 /*
3331  * Back end function used by CtdlMakeMessage() and similar functions
3332  */
3333 char *CtdlReadMessageBody(char *terminator,     /* token signalling EOT */
3334                           long tlen,
3335                           size_t maxlen,                /* maximum message length */
3336                           StrBuf *exist,                /* if non-null, append to it;
3337                                                    exist is ALWAYS freed  */
3338                           int crlf,             /* CRLF newlines instead of LF */
3339                           int *sock             /* socket handle or 0 for this session's client socket */
3340         )
3341 {
3342         StrBuf *Message;
3343
3344         Message = CtdlReadMessageBodyBuf(terminator,
3345                                          tlen,
3346                                          maxlen,
3347                                          exist,
3348                                          crlf,
3349                                          sock);
3350         if (Message == NULL)
3351                 return NULL;
3352         else
3353                 return SmashStrBuf(&Message);
3354 }
3355
3356 struct CtdlMessage *CtdlMakeMessage(
3357         struct ctdluser *author,        /* author's user structure */
3358         char *recipient,                /* NULL if it's not mail */
3359         char *recp_cc,                  /* NULL if it's not mail */
3360         char *room,                     /* room where it's going */
3361         int type,                       /* see MES_ types in header file */
3362         int format_type,                /* variformat, plain text, MIME... */
3363         char *fake_name,                /* who we're masquerading as */
3364         char *my_email,                 /* which of my email addresses to use (empty is ok) */
3365         char *subject,                  /* Subject (optional) */
3366         char *supplied_euid,            /* ...or NULL if this is irrelevant */
3367         char *preformatted_text,        /* ...or NULL to read text from client */
3368         char *references                /* Thread references */
3369 )
3370 {
3371         return CtdlMakeMessageLen(
3372                 author, /* author's user structure */
3373                 recipient,              /* NULL if it's not mail */
3374                 (recipient)?strlen(recipient) : 0,
3375                 recp_cc,                        /* NULL if it's not mail */
3376                 (recp_cc)?strlen(recp_cc): 0,
3377                 room,                   /* room where it's going */
3378                 (room)?strlen(room): 0,
3379                 type,                   /* see MES_ types in header file */
3380                 format_type,            /* variformat, plain text, MIME... */
3381                 fake_name,              /* who we're masquerading as */
3382                 (fake_name)?strlen(fake_name): 0,
3383                 my_email,                       /* which of my email addresses to use (empty is ok) */
3384                 (my_email)?strlen(my_email): 0,
3385                 subject,                        /* Subject (optional) */
3386                 (subject)?strlen(subject): 0,
3387                 supplied_euid,          /* ...or NULL if this is irrelevant */
3388                 (supplied_euid)?strlen(supplied_euid):0,
3389                 preformatted_text,      /* ...or NULL to read text from client */
3390                 (preformatted_text)?strlen(preformatted_text) : 0,
3391                 references,             /* Thread references */
3392                 (references)?strlen(references):0);
3393
3394 }
3395
3396 /*
3397  * Build a binary message to be saved on disk.
3398  * (NOTE: if you supply 'preformatted_text', the buffer you give it
3399  * will become part of the message.  This means you are no longer
3400  * responsible for managing that memory -- it will be freed along with
3401  * the rest of the fields when CM_Free() is called.)
3402  */
3403
3404 struct CtdlMessage *CtdlMakeMessageLen(
3405         struct ctdluser *author,        /* author's user structure */
3406         char *recipient,                /* NULL if it's not mail */
3407         long rcplen,
3408         char *recp_cc,                  /* NULL if it's not mail */
3409         long cclen,
3410         char *room,                     /* room where it's going */
3411         long roomlen,
3412         int type,                       /* see MES_ types in header file */
3413         int format_type,                /* variformat, plain text, MIME... */
3414         char *fake_name,                /* who we're masquerading as */
3415         long fnlen,
3416         char *my_email,                 /* which of my email addresses to use (empty is ok) */
3417         long myelen,
3418         char *subject,                  /* Subject (optional) */
3419         long subjlen,
3420         char *supplied_euid,            /* ...or NULL if this is irrelevant */
3421         long euidlen,
3422         char *preformatted_text,        /* ...or NULL to read text from client */
3423         long textlen,
3424         char *references,               /* Thread references */
3425         long reflen
3426         )
3427 {
3428         struct CitContext *CCC = CC;
3429         /* Don't confuse the poor folks if it's not routed mail. * /
3430            char dest_node[256] = "";*/
3431         long blen;
3432         char buf[1024];
3433         struct CtdlMessage *msg;
3434         StrBuf *FakeAuthor;
3435         StrBuf *FakeEncAuthor = NULL;
3436
3437         msg = malloc(sizeof(struct CtdlMessage));
3438         memset(msg, 0, sizeof(struct CtdlMessage));
3439         msg->cm_magic = CTDLMESSAGE_MAGIC;
3440         msg->cm_anon_type = type;
3441         msg->cm_format_type = format_type;
3442
3443         if (recipient != NULL) rcplen = striplt(recipient);
3444         if (recp_cc != NULL) cclen = striplt(recp_cc);
3445
3446         /* Path or Return-Path */
3447         if (myelen > 0) {
3448                 CM_SetField(msg, eMessagePath, my_email, myelen);
3449         }
3450         else {
3451                 CM_SetField(msg, eMessagePath, author->fullname, strlen(author->fullname));
3452         }
3453         convert_spaces_to_underscores(msg->cm_fields[eMessagePath]);
3454
3455         blen = snprintf(buf, sizeof buf, "%ld", (long)time(NULL));
3456         CM_SetField(msg, eTimestamp, buf, blen);
3457
3458         if (fnlen > 0) {
3459                 FakeAuthor = NewStrBufPlain (fake_name, fnlen);
3460         }
3461         else {
3462                 FakeAuthor = NewStrBufPlain (author->fullname, -1);
3463         }
3464         StrBufRFC2047encode(&FakeEncAuthor, FakeAuthor);
3465         CM_SetAsFieldSB(msg, eAuthor, &FakeEncAuthor);
3466         FreeStrBuf(&FakeAuthor);
3467
3468         if (CCC->room.QRflags & QR_MAILBOX) {           /* room */
3469                 CM_SetField(msg, eOriginalRoom, &CCC->room.QRname[11], strlen(&CCC->room.QRname[11]));
3470         }
3471         else {
3472                 CM_SetField(msg, eOriginalRoom, CCC->room.QRname, strlen(CCC->room.QRname));
3473         }
3474
3475         CM_SetField(msg, eNodeName, CFG_KEY(c_nodename));
3476         CM_SetField(msg, eHumanNode, CFG_KEY(c_humannode));
3477
3478         if (rcplen > 0) {
3479                 CM_SetField(msg, eRecipient, recipient, rcplen);
3480         }
3481         if (cclen > 0) {
3482                 CM_SetField(msg, eCarbonCopY, recp_cc, cclen);
3483         }
3484
3485         if (myelen > 0) {
3486                 CM_SetField(msg, erFc822Addr, my_email, myelen);
3487         }
3488         else if ( (author == &CCC->user) && (!IsEmptyStr(CCC->cs_inet_email)) ) {
3489                 CM_SetField(msg, erFc822Addr, CCC->cs_inet_email, strlen(CCC->cs_inet_email));
3490         }
3491
3492         if (subject != NULL) {
3493                 long length;
3494                 length = striplt(subject);
3495                 if (length > 0) {
3496                         long i;
3497                         long IsAscii;
3498                         IsAscii = -1;
3499                         i = 0;
3500                         while ((subject[i] != '\0') &&
3501                                (IsAscii = isascii(subject[i]) != 0 ))
3502                                 i++;
3503                         if (IsAscii != 0)
3504                                 CM_SetField(msg, eMsgSubject, subject, subjlen);
3505                         else /* ok, we've got utf8 in the string. */
3506                         {
3507                                 char *rfc2047Subj;
3508                                 rfc2047Subj = rfc2047encode(subject, length);
3509                                 CM_SetAsField(msg, eMsgSubject, &rfc2047Subj, strlen(rfc2047Subj));
3510                         }
3511
3512                 }
3513         }
3514
3515         if (euidlen > 0) {
3516                 CM_SetField(msg, eExclusiveID, supplied_euid, euidlen);
3517         }
3518
3519         if (reflen > 0) {
3520                 CM_SetField(msg, eWeferences, references, reflen);
3521         }
3522
3523         if (preformatted_text != NULL) {
3524                 CM_SetField(msg, eMesageText, preformatted_text, textlen);
3525         }
3526         else {
3527                 StrBuf *MsgBody;
3528                 MsgBody = CtdlReadMessageBodyBuf(HKEY("000"), config.c_maxmsglen, NULL, 0, 0);
3529                 if (MsgBody != NULL) {
3530                         CM_SetAsFieldSB(msg, eMesageText, &MsgBody);
3531                 }
3532         }
3533
3534         return(msg);
3535 }
3536
3537
3538
3539
3540 /*
3541  * API function to delete messages which match a set of criteria
3542  * (returns the actual number of messages deleted)
3543  */
3544 int CtdlDeleteMessages(char *room_name,         /* which room */
3545                        long *dmsgnums,          /* array of msg numbers to be deleted */
3546                        int num_dmsgnums,        /* number of msgs to be deleted, or 0 for "any" */
3547                        char *content_type       /* or "" for any.  regular expressions expected. */
3548         )
3549 {
3550         struct CitContext *CCC = CC;
3551         struct ctdlroom qrbuf;
3552         struct cdbdata *cdbfr;
3553         long *msglist = NULL;
3554         long *dellist = NULL;
3555         int num_msgs = 0;
3556         int i, j;
3557         int num_deleted = 0;
3558         int delete_this;
3559         struct MetaData smi;
3560         regex_t re;
3561         regmatch_t pm;
3562         int need_to_free_re = 0;
3563
3564         if (content_type) if (!IsEmptyStr(content_type)) {
3565                         regcomp(&re, content_type, 0);
3566                         need_to_free_re = 1;
3567                 }
3568         MSG_syslog(LOG_DEBUG, " CtdlDeleteMessages(%s, %d msgs, %s)\n",
3569                    room_name, num_dmsgnums, content_type);
3570
3571         /* get room record, obtaining a lock... */
3572         if (CtdlGetRoomLock(&qrbuf, room_name) != 0) {
3573                 MSG_syslog(LOG_ERR, " CtdlDeleteMessages(): Room <%s> not found\n",
3574                            room_name);
3575                 if (need_to_free_re) regfree(&re);
3576                 return (0);     /* room not found */
3577         }
3578         cdbfr = cdb_fetch(CDB_MSGLISTS, &qrbuf.QRnumber, sizeof(long));
3579
3580         if (cdbfr != NULL) {
3581                 dellist = malloc(cdbfr->len);
3582                 msglist = (long *) cdbfr->ptr;
3583                 cdbfr->ptr = NULL;      /* CtdlDeleteMessages() now owns this memory */
3584                 num_msgs = cdbfr->len / sizeof(long);
3585                 cdb_free(cdbfr);
3586         }
3587         if (num_msgs > 0) {
3588                 int have_contenttype = (content_type != NULL) && !IsEmptyStr(content_type);
3589                 int have_delmsgs = (num_dmsgnums == 0) || (dmsgnums == NULL);
3590                 int have_more_del = 1;
3591
3592                 num_msgs = sort_msglist(msglist, num_msgs);
3593                 if (num_dmsgnums > 1)
3594                         num_dmsgnums = sort_msglist(dmsgnums, num_dmsgnums);
3595 /*
3596                 {
3597                         StrBuf *dbg = NewStrBuf();
3598                         for (i = 0; i < num_dmsgnums; i++)
3599                                 StrBufAppendPrintf(dbg, ", %ld", dmsgnums[i]);
3600                         MSG_syslog(LOG_DEBUG, " Deleting before: %s", ChrPtr(dbg));
3601                         FreeStrBuf(&dbg);
3602                 }
3603 */
3604                 i = 0; j = 0;
3605                 while ((i < num_msgs) && (have_more_del)) {
3606                         delete_this = 0x00;
3607
3608                         /* Set/clear a bit for each criterion */
3609
3610                         /* 0 messages in the list or a null list means that we are
3611                          * interested in deleting any messages which meet the other criteria.
3612                          */
3613                         if (have_delmsgs) {
3614                                 delete_this |= 0x01;
3615                         }
3616                         else {
3617                                 while ((i < num_msgs) && (msglist[i] < dmsgnums[j])) i++;
3618
3619                                 if (i >= num_msgs)
3620                                         continue;
3621
3622                                 if (msglist[i] == dmsgnums[j]) {
3623                                         delete_this |= 0x01;
3624                                 }
3625                                 j++;
3626                                 have_more_del = (j < num_dmsgnums);
3627                         }
3628
3629                         if (have_contenttype) {
3630                                 GetMetaData(&smi, msglist[i]);
3631                                 if (regexec(&re, smi.meta_content_type, 1, &pm, 0) == 0) {
3632                                         delete_this |= 0x02;
3633                                 }
3634                         } else {
3635                                 delete_this |= 0x02;
3636                         }
3637
3638                         /* Delete message only if all bits are set */
3639                         if (delete_this == 0x03) {
3640                                 dellist[num_deleted++] = msglist[i];
3641                                 msglist[i] = 0L;
3642                         }
3643                         i++;
3644                 }
3645 /*
3646                 {
3647                         StrBuf *dbg = NewStrBuf();
3648                         for (i = 0; i < num_deleted; i++)
3649                                 StrBufAppendPrintf(dbg, ", %ld", dellist[i]);
3650                         MSG_syslog(LOG_DEBUG, " Deleting: %s", ChrPtr(dbg));
3651                         FreeStrBuf(&dbg);
3652                 }
3653 */
3654                 num_msgs = sort_msglist(msglist, num_msgs);
3655                 cdb_store(CDB_MSGLISTS, &qrbuf.QRnumber, (int)sizeof(long),
3656                           msglist, (int)(num_msgs * sizeof(long)));
3657
3658                 if (num_msgs > 0)
3659                         qrbuf.QRhighest = msglist[num_msgs - 1];
3660                 else
3661                         qrbuf.QRhighest = 0;
3662         }
3663         CtdlPutRoomLock(&qrbuf);
3664
3665         /* Go through the messages we pulled out of the index, and decrement
3666          * their reference counts by 1.  If this is the only room the message
3667          * was in, the reference count will reach zero and the message will
3668          * automatically be deleted from the database.  We do this in a
3669          * separate pass because there might be plug-in hooks getting called,
3670          * and we don't want that happening during an S_ROOMS critical
3671          * section.
3672          */
3673         if (num_deleted) {
3674                 for (i=0; i<num_deleted; ++i) {
3675                         PerformDeleteHooks(qrbuf.QRname, dellist[i]);
3676                 }
3677                 AdjRefCountList(dellist, num_deleted, -1);
3678         }
3679         /* Now free the memory we used, and go away. */
3680         if (msglist != NULL) free(msglist);
3681         if (dellist != NULL) free(dellist);
3682         MSG_syslog(LOG_DEBUG, " %d message(s) deleted.\n", num_deleted);
3683         if (need_to_free_re) regfree(&re);
3684         return (num_deleted);
3685 }
3686
3687
3688
3689
3690 /*
3691  * GetMetaData()  -  Get the supplementary record for a message
3692  */
3693 void GetMetaData(struct MetaData *smibuf, long msgnum)
3694 {
3695
3696         struct cdbdata *cdbsmi;
3697         long TheIndex;
3698
3699         memset(smibuf, 0, sizeof(struct MetaData));
3700         smibuf->meta_msgnum = msgnum;
3701         smibuf->meta_refcount = 1;      /* Default reference count is 1 */
3702
3703         /* Use the negative of the message number for its supp record index */
3704         TheIndex = (0L - msgnum);
3705
3706         cdbsmi = cdb_fetch(CDB_MSGMAIN, &TheIndex, sizeof(long));
3707         if (cdbsmi == NULL) {
3708                 return;         /* record not found; go with defaults */
3709         }
3710         memcpy(smibuf, cdbsmi->ptr,
3711                ((cdbsmi->len > sizeof(struct MetaData)) ?
3712                 sizeof(struct MetaData) : cdbsmi->len));
3713         cdb_free(cdbsmi);
3714         return;
3715 }
3716
3717
3718 /*
3719  * PutMetaData()  -  (re)write supplementary record for a message
3720  */
3721 void PutMetaData(struct MetaData *smibuf)
3722 {
3723         long TheIndex;
3724
3725         /* Use the negative of the message number for the metadata db index */
3726         TheIndex = (0L - smibuf->meta_msgnum);
3727
3728         cdb_store(CDB_MSGMAIN,
3729                   &TheIndex, (int)sizeof(long),
3730                   smibuf, (int)sizeof(struct MetaData));
3731
3732 }
3733
3734 /*
3735  * AdjRefCount  -  submit an adjustment to the reference count for a message.
3736  *                 (These are just queued -- we actually process them later.)
3737  */
3738 void AdjRefCount(long msgnum, int incr)
3739 {
3740         struct CitContext *CCC = CC;
3741         struct arcq new_arcq;
3742         int rv = 0;
3743
3744         MSG_syslog(LOG_DEBUG, "AdjRefCount() msg %ld ref count delta %+d\n", msgnum, incr);
3745
3746         begin_critical_section(S_SUPPMSGMAIN);
3747         if (arcfp == NULL) {
3748                 arcfp = fopen(file_arcq, "ab+");
3749                 chown(file_arcq, CTDLUID, (-1));
3750                 chmod(file_arcq, 0600);
3751         }
3752         end_critical_section(S_SUPPMSGMAIN);
3753
3754         /* msgnum < 0 means that we're trying to close the file */
3755         if (msgnum < 0) {
3756                 MSGM_syslog(LOG_DEBUG, "Closing the AdjRefCount queue file\n");
3757                 begin_critical_section(S_SUPPMSGMAIN);
3758                 if (arcfp != NULL) {
3759                         fclose(arcfp);
3760                         arcfp = NULL;
3761                 }
3762                 end_critical_section(S_SUPPMSGMAIN);
3763                 return;
3764         }
3765
3766         /*
3767          * If we can't open the queue, perform the operation synchronously.
3768          */
3769         if (arcfp == NULL) {
3770                 TDAP_AdjRefCount(msgnum, incr);
3771                 return;
3772         }
3773
3774         new_arcq.arcq_msgnum = msgnum;
3775         new_arcq.arcq_delta = incr;
3776         rv = fwrite(&new_arcq, sizeof(struct arcq), 1, arcfp);
3777         if (rv == -1) {
3778                 MSG_syslog(LOG_EMERG, "Couldn't write Refcount Queue File %s: %s\n",
3779                            file_arcq,
3780                            strerror(errno));
3781         }
3782         fflush(arcfp);
3783
3784         return;
3785 }
3786
3787 void AdjRefCountList(long *msgnum, long nmsg, int incr)
3788 {
3789         struct CitContext *CCC = CC;
3790         long i, the_size, offset;
3791         struct arcq *new_arcq;
3792         int rv = 0;
3793
3794         MSG_syslog(LOG_DEBUG, "AdjRefCountList() msg %ld ref count delta %+d\n", nmsg, incr);
3795
3796         begin_critical_section(S_SUPPMSGMAIN);
3797         if (arcfp == NULL) {
3798                 arcfp = fopen(file_arcq, "ab+");
3799                 chown(file_arcq, CTDLUID, (-1));
3800                 chmod(file_arcq, 0600);
3801         }
3802         end_critical_section(S_SUPPMSGMAIN);
3803
3804         /*
3805          * If we can't open the queue, perform the operation synchronously.
3806          */
3807         if (arcfp == NULL) {
3808                 for (i = 0; i < nmsg; i++)
3809                         TDAP_AdjRefCount(msgnum[i], incr);
3810                 return;
3811         }
3812
3813         the_size = sizeof(struct arcq) * nmsg;
3814         new_arcq = malloc(the_size);
3815         for (i = 0; i < nmsg; i++) {
3816                 new_arcq[i].arcq_msgnum = msgnum[i];
3817                 new_arcq[i].arcq_delta = incr;
3818         }
3819         rv = 0;
3820         offset = 0;
3821         while ((rv >= 0) && (offset < the_size))
3822         {
3823                 rv = fwrite(new_arcq + offset, 1, the_size - offset, arcfp);
3824                 if (rv == -1) {
3825                         MSG_syslog(LOG_EMERG, "Couldn't write Refcount Queue File %s: %s\n",
3826                                    file_arcq,
3827                                    strerror(errno));
3828                 }
3829                 else {
3830                         offset += rv;
3831                 }
3832         }
3833         free(new_arcq);
3834         fflush(arcfp);
3835
3836         return;
3837 }
3838
3839
3840 /*
3841  * TDAP_ProcessAdjRefCountQueue()
3842  *
3843  * Process the queue of message count adjustments that was created by calls
3844  * to AdjRefCount() ... by reading the queue and calling TDAP_AdjRefCount()
3845  * for each one.  This should be an "off hours" operation.
3846  */
3847 int TDAP_ProcessAdjRefCountQueue(void)
3848 {
3849         struct CitContext *CCC = CC;
3850         char file_arcq_temp[PATH_MAX];
3851         int r;
3852         FILE *fp;
3853         struct arcq arcq_rec;
3854         int num_records_processed = 0;
3855
3856         snprintf(file_arcq_temp, sizeof file_arcq_temp, "%s.%04x", file_arcq, rand());
3857
3858         begin_critical_section(S_SUPPMSGMAIN);
3859         if (arcfp != NULL) {
3860                 fclose(arcfp);
3861                 arcfp = NULL;
3862         }
3863
3864         r = link(file_arcq, file_arcq_temp);
3865         if (r != 0) {
3866                 MSG_syslog(LOG_CRIT, "%s: %s\n", file_arcq_temp, strerror(errno));
3867                 end_critical_section(S_SUPPMSGMAIN);
3868                 return(num_records_processed);
3869         }
3870
3871         unlink(file_arcq);
3872         end_critical_section(S_SUPPMSGMAIN);
3873
3874         fp = fopen(file_arcq_temp, "rb");
3875         if (fp == NULL) {
3876                 MSG_syslog(LOG_CRIT, "%s: %s\n", file_arcq_temp, strerror(errno));
3877                 return(num_records_processed);
3878         }
3879
3880         while (fread(&arcq_rec, sizeof(struct arcq), 1, fp) == 1) {
3881                 TDAP_AdjRefCount(arcq_rec.arcq_msgnum, arcq_rec.arcq_delta);
3882                 ++num_records_processed;
3883         }
3884
3885         fclose(fp);
3886         r = unlink(file_arcq_temp);
3887         if (r != 0) {
3888                 MSG_syslog(LOG_CRIT, "%s: %s\n", file_arcq_temp, strerror(errno));
3889         }
3890
3891         return(num_records_processed);
3892 }
3893
3894
3895
3896 /*
3897  * TDAP_AdjRefCount  -  adjust the reference count for a message.
3898  *                      This one does it "for real" because it's called by
3899  *                      the autopurger function that processes the queue
3900  *                      created by AdjRefCount().   If a message's reference
3901  *                      count becomes zero, we also delete the message from
3902  *                      disk and de-index it.
3903  */
3904 void TDAP_AdjRefCount(long msgnum, int incr)
3905 {
3906         struct CitContext *CCC = CC;
3907
3908         struct MetaData smi;
3909         long delnum;
3910
3911         /* This is a *tight* critical section; please keep it that way, as
3912          * it may get called while nested in other critical sections.
3913          * Complicating this any further will surely cause deadlock!
3914          */
3915         begin_critical_section(S_SUPPMSGMAIN);
3916         GetMetaData(&smi, msgnum);
3917         smi.meta_refcount += incr;
3918         PutMetaData(&smi);
3919         end_critical_section(S_SUPPMSGMAIN);
3920         MSG_syslog(LOG_DEBUG, "TDAP_AdjRefCount() msg %ld ref count delta %+d, is now %d\n",
3921                    msgnum, incr, smi.meta_refcount
3922                 );
3923
3924         /* If the reference count is now zero, delete the message
3925          * (and its supplementary record as well).
3926          */
3927         if (smi.meta_refcount == 0) {
3928                 MSG_syslog(LOG_DEBUG, "Deleting message <%ld>\n", msgnum);
3929
3930                 /* Call delete hooks with NULL room to show it has gone altogether */
3931                 PerformDeleteHooks(NULL, msgnum);
3932
3933                 /* Remove from message base */
3934                 delnum = msgnum;
3935                 cdb_delete(CDB_MSGMAIN, &delnum, (int)sizeof(long));
3936                 cdb_delete(CDB_BIGMSGS, &delnum, (int)sizeof(long));
3937
3938                 /* Remove metadata record */
3939                 delnum = (0L - msgnum);
3940                 cdb_delete(CDB_MSGMAIN, &delnum, (int)sizeof(long));
3941         }
3942
3943 }
3944
3945 /*
3946  * Write a generic object to this room
3947  *
3948  * Note: this could be much more efficient.  Right now we use two temporary
3949  * files, and still pull the message into memory as with all others.
3950  */
3951 void CtdlWriteObject(char *req_room,                    /* Room to stuff it in */
3952                      char *content_type,                /* MIME type of this object */
3953                      char *raw_message,         /* Data to be written */
3954                      off_t raw_length,          /* Size of raw_message */
3955                      struct ctdluser *is_mailbox,       /* Mailbox room? */
3956                      int is_binary,                     /* Is encoding necessary? */
3957                      int is_unique,                     /* Del others of this type? */
3958                      unsigned int flags         /* Internal save flags */
3959         )
3960 {
3961         struct CitContext *CCC = CC;
3962         struct ctdlroom qrbuf;
3963         char roomname[ROOMNAMELEN];
3964         struct CtdlMessage *msg;
3965         StrBuf *encoded_message = NULL;
3966
3967         if (is_mailbox != NULL) {
3968                 CtdlMailboxName(roomname, sizeof roomname, is_mailbox, req_room);
3969         }
3970         else {
3971                 safestrncpy(roomname, req_room, sizeof(roomname));
3972         }
3973
3974         MSG_syslog(LOG_DEBUG, "Raw length is %ld\n", (long)raw_length);
3975
3976         if (is_binary) {
3977                 encoded_message = NewStrBufPlain(NULL, (size_t) (((raw_length * 134) / 100) + 4096 ) );
3978         }
3979         else {
3980                 encoded_message = NewStrBufPlain(NULL, (size_t)(raw_length + 4096));
3981         }
3982
3983         StrBufAppendBufPlain(encoded_message, HKEY("Content-type: "), 0);
3984         StrBufAppendBufPlain(encoded_message, content_type, -1, 0);
3985         StrBufAppendBufPlain(encoded_message, HKEY("\n"), 0);
3986
3987         if (is_binary) {
3988                 StrBufAppendBufPlain(encoded_message, HKEY("Content-transfer-encoding: base64\n\n"), 0);
3989         }
3990         else {
3991                 StrBufAppendBufPlain(encoded_message, HKEY("Content-transfer-encoding: 7bit\n\n"), 0);
3992         }
3993
3994         if (is_binary) {
3995                 StrBufBase64Append(encoded_message, NULL, raw_message, raw_length, 0);
3996         }
3997         else {
3998                 StrBufAppendBufPlain(encoded_message, raw_message, raw_length, 0);
3999         }
4000
4001         MSGM_syslog(LOG_DEBUG, "Allocating\n");
4002         msg = malloc(sizeof(struct CtdlMessage));
4003         memset(msg, 0, sizeof(struct CtdlMessage));
4004         msg->cm_magic = CTDLMESSAGE_MAGIC;
4005         msg->cm_anon_type = MES_NORMAL;
4006         msg->cm_format_type = 4;
4007         CM_SetField(msg, eAuthor, CCC->user.fullname, strlen(CCC->user.fullname));
4008         CM_SetField(msg, eOriginalRoom, req_room, strlen(req_room));
4009         CM_SetField(msg, eNodeName, CFG_KEY(c_nodename));
4010         CM_SetField(msg, eHumanNode, CFG_KEY(c_humannode));
4011         msg->cm_flags = flags;
4012
4013         CM_SetAsFieldSB(msg, eMesageText, &encoded_message);
4014
4015         /* Create the requested room if we have to. */
4016         if (CtdlGetRoom(&qrbuf, roomname) != 0) {
4017                 CtdlCreateRoom(roomname,
4018                                ( (is_mailbox != NULL) ? 5 : 3 ),
4019                                "", 0, 1, 0, VIEW_BBS);
4020         }
4021         /* If the caller specified this object as unique, delete all
4022          * other objects of this type that are currently in the room.
4023          */
4024         if (is_unique) {
4025                 MSG_syslog(LOG_DEBUG, "Deleted %d other msgs of this type\n",
4026                            CtdlDeleteMessages(roomname, NULL, 0, content_type)
4027                         );
4028         }
4029         /* Now write the data */
4030         CtdlSubmitMsg(msg, NULL, roomname, 0);
4031         CM_Free(msg);
4032 }
4033
4034
4035
4036 /*****************************************************************************/
4037 /*                      MODULE INITIALIZATION STUFF                          */
4038 /*****************************************************************************/
4039 void SetMessageDebugEnabled(const int n)
4040 {
4041         MessageDebugEnabled = n;
4042 }
4043 CTDL_MODULE_INIT(msgbase)
4044 {
4045         if (!threading) {
4046                 CtdlRegisterDebugFlagHook(HKEY("messages"), SetMessageDebugEnabled, &MessageDebugEnabled);
4047         }
4048
4049         /* return our Subversion id for the Log */
4050         return "msgbase";
4051 }