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          * The rest is zero or more arbitrary fields.  Load them in.
1134          * We're done when we encounter either a zero-length field or
1135          * have just processed the 'M' (message text) field.
1136          */
1137         do {
1138                 long len;
1139                 if (mptr >= upper_bound) {
1140                         break;
1141                 }
1142                 field_header = *mptr++;
1143                 which = field_header;
1144                 len = strlen(mptr);
1145                 CM_SetField(ret, which, mptr, len);
1146
1147                 mptr += len + 1;        /* advance to next field */
1148
1149         } while ((mptr < upper_bound) && (field_header != 'M'));
1150
1151         cdb_free(dmsgtext);
1152
1153         /* Always make sure there's something in the msg text field.  If
1154          * it's NULL, the message text is most likely stored separately,
1155          * so go ahead and fetch that.  Failing that, just set a dummy
1156          * body so other code doesn't barf.
1157          */
1158         if ( (CM_IsEmpty(ret, eMesageText)) && (with_body) ) {
1159                 dmsgtext = cdb_fetch(CDB_BIGMSGS, &msgnum, sizeof(long));
1160                 if (dmsgtext != NULL) {
1161                         CM_SetAsField(ret, eMesageText, &dmsgtext->ptr, dmsgtext->len);
1162                         cdb_free(dmsgtext);
1163                 }
1164         }
1165         if (CM_IsEmpty(ret, eMesageText)) {
1166                 CM_SetField(ret, eMesageText, HKEY("\r\n\r\n (no text)\r\n"));
1167         }
1168
1169         /* Perform "before read" hooks (aborting if any return nonzero) */
1170         if (PerformMessageHooks(ret, NULL, EVT_BEFOREREAD) > 0) {
1171                 CM_Free(ret);
1172                 return NULL;
1173         }
1174
1175         return (ret);
1176 }
1177
1178
1179
1180 /*
1181  * Pre callback function for multipart/alternative
1182  *
1183  * NOTE: this differs from the standard behavior for a reason.  Normally when
1184  *       displaying multipart/alternative you want to show the _last_ usable
1185  *       format in the message.  Here we show the _first_ one, because it's
1186  *       usually text/plain.  Since this set of functions is designed for text
1187  *       output to non-MIME-aware clients, this is the desired behavior.
1188  *
1189  */
1190 void fixed_output_pre(char *name, char *filename, char *partnum, char *disp,
1191                 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
1192                 char *cbid, void *cbuserdata)
1193 {
1194         struct CitContext *CCC = CC;
1195         struct ma_info *ma;
1196
1197         ma = (struct ma_info *)cbuserdata;
1198         MSG_syslog(LOG_DEBUG, "fixed_output_pre() type=<%s>\n", cbtype);
1199         if (!strcasecmp(cbtype, "multipart/alternative")) {
1200                 ++ma->is_ma;
1201                 ma->did_print = 0;
1202         }
1203         if (!strcasecmp(cbtype, "message/rfc822")) {
1204                 ++ma->freeze;
1205         }
1206 }
1207
1208 /*
1209  * Post callback function for multipart/alternative
1210  */
1211 void fixed_output_post(char *name, char *filename, char *partnum, char *disp,
1212                 void *content, char *cbtype, char *cbcharset, size_t length,
1213                 char *encoding, char *cbid, void *cbuserdata)
1214 {
1215         struct CitContext *CCC = CC;
1216         struct ma_info *ma;
1217
1218         ma = (struct ma_info *)cbuserdata;
1219         MSG_syslog(LOG_DEBUG, "fixed_output_post() type=<%s>\n", cbtype);
1220         if (!strcasecmp(cbtype, "multipart/alternative")) {
1221                 --ma->is_ma;
1222                 ma->did_print = 0;
1223         }
1224         if (!strcasecmp(cbtype, "message/rfc822")) {
1225                 --ma->freeze;
1226         }
1227 }
1228
1229 /*
1230  * Inline callback function for mime parser that wants to display text
1231  */
1232 void fixed_output(char *name, char *filename, char *partnum, char *disp,
1233                 void *content, char *cbtype, char *cbcharset, size_t length,
1234                 char *encoding, char *cbid, void *cbuserdata)
1235 {
1236         struct CitContext *CCC = CC;
1237         char *ptr;
1238         char *wptr;
1239         size_t wlen;
1240         struct ma_info *ma;
1241
1242         ma = (struct ma_info *)cbuserdata;
1243
1244         MSG_syslog(LOG_DEBUG,
1245                 "fixed_output() part %s: %s (%s) (%ld bytes)\n",
1246                 partnum, filename, cbtype, (long)length);
1247
1248         /*
1249          * If we're in the middle of a multipart/alternative scope and
1250          * we've already printed another section, skip this one.
1251          */
1252         if ( (ma->is_ma) && (ma->did_print) ) {
1253                 MSG_syslog(LOG_DEBUG, "Skipping part %s (%s)\n", partnum, cbtype);
1254                 return;
1255         }
1256         ma->did_print = 1;
1257
1258         if ( (!strcasecmp(cbtype, "text/plain"))
1259            || (IsEmptyStr(cbtype)) ) {
1260                 wptr = content;
1261                 if (length > 0) {
1262                         client_write(wptr, length);
1263                         if (wptr[length-1] != '\n') {
1264                                 cprintf("\n");
1265                         }
1266                 }
1267                 return;
1268         }
1269
1270         if (!strcasecmp(cbtype, "text/html")) {
1271                 ptr = html_to_ascii(content, length, 80, 0);
1272                 wlen = strlen(ptr);
1273                 client_write(ptr, wlen);
1274                 if ((wlen > 0) && (ptr[wlen-1] != '\n')) {
1275                         cprintf("\n");
1276                 }
1277                 free(ptr);
1278                 return;
1279         }
1280
1281         if (ma->use_fo_hooks) {
1282                 if (PerformFixedOutputHooks(cbtype, content, length)) {
1283                 /* above function returns nonzero if it handled the part */
1284                         return;
1285                 }
1286         }
1287
1288         if (strncasecmp(cbtype, "multipart/", 10)) {
1289                 cprintf("Part %s: %s (%s) (%ld bytes)\r\n",
1290                         partnum, filename, cbtype, (long)length);
1291                 return;
1292         }
1293 }
1294
1295 /*
1296  * The client is elegant and sophisticated and wants to be choosy about
1297  * MIME content types, so figure out which multipart/alternative part
1298  * we're going to send.
1299  *
1300  * We use a system of weights.  When we find a part that matches one of the
1301  * MIME types we've declared as preferential, we can store it in ma->chosen_part
1302  * and then set ma->chosen_pref to that MIME type's position in our preference
1303  * list.  If we then hit another match, we only replace the first match if
1304  * the preference value is lower.
1305  */
1306 void choose_preferred(char *name, char *filename, char *partnum, char *disp,
1307                 void *content, char *cbtype, char *cbcharset, size_t length,
1308                 char *encoding, char *cbid, void *cbuserdata)
1309 {
1310         struct CitContext *CCC = CC;
1311         char buf[1024];
1312         int i;
1313         struct ma_info *ma;
1314
1315         ma = (struct ma_info *)cbuserdata;
1316
1317         // NOTE: REMOVING THIS CONDITIONAL FIXES BUG 220
1318         //       http://bugzilla.citadel.org/show_bug.cgi?id=220
1319         // I don't know if there are any side effects!  Please TEST TEST TEST
1320         //if (ma->is_ma > 0) {
1321
1322         for (i=0; i<num_tokens(CCC->preferred_formats, '|'); ++i) {
1323                 extract_token(buf, CCC->preferred_formats, i, '|', sizeof buf);
1324                 if ( (!strcasecmp(buf, cbtype)) && (!ma->freeze) ) {
1325                         if (i < ma->chosen_pref) {
1326                                 MSG_syslog(LOG_DEBUG, "Setting chosen part: <%s>\n", partnum);
1327                                 safestrncpy(ma->chosen_part, partnum, sizeof ma->chosen_part);
1328                                 ma->chosen_pref = i;
1329                         }
1330                 }
1331         }
1332 }
1333
1334 /*
1335  * Now that we've chosen our preferred part, output it.
1336  */
1337 void output_preferred(char *name,
1338                       char *filename,
1339                       char *partnum,
1340                       char *disp,
1341                       void *content,
1342                       char *cbtype,
1343                       char *cbcharset,
1344                       size_t length,
1345                       char *encoding,
1346                       char *cbid,
1347                       void *cbuserdata)
1348 {
1349         struct CitContext *CCC = CC;
1350         int i;
1351         char buf[128];
1352         int add_newline = 0;
1353         char *text_content;
1354         struct ma_info *ma;
1355         char *decoded = NULL;
1356         size_t bytes_decoded;
1357         int rc = 0;
1358
1359         ma = (struct ma_info *)cbuserdata;
1360
1361         /* This is not the MIME part you're looking for... */
1362         if (strcasecmp(partnum, ma->chosen_part)) return;
1363
1364         /* If the content-type of this part is in our preferred formats
1365          * list, we can simply output it verbatim.
1366          */
1367         for (i=0; i<num_tokens(CCC->preferred_formats, '|'); ++i) {
1368                 extract_token(buf, CCC->preferred_formats, i, '|', sizeof buf);
1369                 if (!strcasecmp(buf, cbtype)) {
1370                         /* Yeah!  Go!  W00t!! */
1371                         if (ma->dont_decode == 0)
1372                                 rc = mime_decode_now (content,
1373                                                       length,
1374                                                       encoding,
1375                                                       &decoded,
1376                                                       &bytes_decoded);
1377                         if (rc < 0)
1378                                 break; /* Give us the chance, maybe theres another one. */
1379
1380                         if (rc == 0) text_content = (char *)content;
1381                         else {
1382                                 text_content = decoded;
1383                                 length = bytes_decoded;
1384                         }
1385
1386                         if (text_content[length-1] != '\n') {
1387                                 ++add_newline;
1388                         }
1389                         cprintf("Content-type: %s", cbtype);
1390                         if (!IsEmptyStr(cbcharset)) {
1391                                 cprintf("; charset=%s", cbcharset);
1392                         }
1393                         cprintf("\nContent-length: %d\n",
1394                                 (int)(length + add_newline) );
1395                         if (!IsEmptyStr(encoding)) {
1396                                 cprintf("Content-transfer-encoding: %s\n", encoding);
1397                         }
1398                         else {
1399                                 cprintf("Content-transfer-encoding: 7bit\n");
1400                         }
1401                         cprintf("X-Citadel-MSG4-Partnum: %s\n", partnum);
1402                         cprintf("\n");
1403                         if (client_write(text_content, length) == -1)
1404                         {
1405                                 MSGM_syslog(LOG_ERR, "output_preferred(): aborting due to write failure.\n");
1406                                 return;
1407                         }
1408                         if (add_newline) cprintf("\n");
1409                         if (decoded != NULL) free(decoded);
1410                         return;
1411                 }
1412         }
1413
1414         /* No translations required or possible: output as text/plain */
1415         cprintf("Content-type: text/plain\n\n");
1416         rc = 0;
1417         if (ma->dont_decode == 0)
1418                 rc = mime_decode_now (content,
1419                                       length,
1420                                       encoding,
1421                                       &decoded,
1422                                       &bytes_decoded);
1423         if (rc < 0)
1424                 return; /* Give us the chance, maybe theres another one. */
1425
1426         if (rc == 0) text_content = (char *)content;
1427         else {
1428                 text_content = decoded;
1429                 length = bytes_decoded;
1430         }
1431
1432         fixed_output(name, filename, partnum, disp, text_content, cbtype, cbcharset,
1433                         length, encoding, cbid, cbuserdata);
1434         if (decoded != NULL) free(decoded);
1435 }
1436
1437
1438 struct encapmsg {
1439         char desired_section[64];
1440         char *msg;
1441         size_t msglen;
1442 };
1443
1444
1445 /*
1446  * Callback function for
1447  */
1448 void extract_encapsulated_message(char *name, char *filename, char *partnum, char *disp,
1449                    void *content, char *cbtype, char *cbcharset, size_t length,
1450                    char *encoding, char *cbid, void *cbuserdata)
1451 {
1452         struct encapmsg *encap;
1453
1454         encap = (struct encapmsg *)cbuserdata;
1455
1456         /* Only proceed if this is the desired section... */
1457         if (!strcasecmp(encap->desired_section, partnum)) {
1458                 encap->msglen = length;
1459                 encap->msg = malloc(length + 2);
1460                 memcpy(encap->msg, content, length);
1461                 return;
1462         }
1463 }
1464
1465
1466 /*
1467  * Determine whether the specified message exists in the cached_msglist
1468  * (This is a security check)
1469  */
1470 int check_cached_msglist(long msgnum) {
1471         struct CitContext *CCC = CC;
1472
1473         /* cases in which we skip the check */
1474         if (!CCC) return om_ok;                                         /* not a session */
1475         if (CCC->client_socket <= 0) return om_ok;                      /* not a client session */
1476         if (CCC->cached_msglist == NULL) return om_access_denied;       /* no msglist fetched */
1477         if (CCC->cached_num_msgs == 0) return om_access_denied;         /* nothing to check */
1478
1479
1480         /* Do a binary search within the cached_msglist for the requested msgnum */
1481         int min = 0;
1482         int max = (CC->cached_num_msgs - 1);
1483
1484         while (max >= min) {
1485                 int middle = min + (max-min) / 2 ;
1486                 if (msgnum == CCC->cached_msglist[middle]) {
1487                         return om_ok;
1488                 }
1489                 if (msgnum > CC->cached_msglist[middle]) {
1490                         min = middle + 1;
1491                 }
1492                 else {
1493                         max = middle - 1;
1494                 }
1495         }
1496
1497         return om_access_denied;
1498 }
1499
1500
1501
1502 /*
1503  * Get a message off disk.  (returns om_* values found in msgbase.h)
1504  *
1505  */
1506 int CtdlOutputMsg(long msg_num,         /* message number (local) to fetch */
1507                   int mode,             /* how would you like that message? */
1508                   int headers_only,     /* eschew the message body? */
1509                   int do_proto,         /* do Citadel protocol responses? */
1510                   int crlf,             /* Use CRLF newlines instead of LF? */
1511                   char *section,        /* NULL or a message/rfc822 section */
1512                   int flags,            /* various flags; see msgbase.h */
1513                   char **Author,
1514                   char **Address
1515 ) {
1516         struct CitContext *CCC = CC;
1517         struct CtdlMessage *TheMessage = NULL;
1518         int retcode = CIT_OK;
1519         struct encapmsg encap;
1520         int r;
1521
1522         MSG_syslog(LOG_DEBUG, "CtdlOutputMsg(msgnum=%ld, mode=%d, section=%s)\n",
1523                 msg_num, mode,
1524                 (section ? section : "<>")
1525         );
1526
1527         r = CtdlDoIHavePermissionToReadMessagesInThisRoom();
1528         if (r != om_ok) {
1529                 if (do_proto) {
1530                         if (r == om_not_logged_in) {
1531                                 cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
1532                         }
1533                         else {
1534                                 cprintf("%d An unknown error has occurred.\n", ERROR);
1535                         }
1536                 }
1537                 return(r);
1538         }
1539
1540         /*
1541          * Check to make sure the message is actually IN this room
1542          */
1543         r = check_cached_msglist(msg_num);
1544         if (r == om_access_denied) {
1545                 /* Not in the cache?  We get ONE shot to check it again. */
1546                 CtdlForEachMessage(MSGS_ALL, 0L, NULL, NULL, NULL, NULL, NULL);
1547                 r = check_cached_msglist(msg_num);
1548         }
1549         if (r != om_ok) {
1550                 MSG_syslog(LOG_DEBUG, "Security check fail: message %ld is not in %s\n",
1551                            msg_num, CCC->room.QRname
1552                 );
1553                 if (do_proto) {
1554                         if (r == om_access_denied) {
1555                                 cprintf("%d message %ld was not found in this room\n",
1556                                         ERROR + HIGHER_ACCESS_REQUIRED,
1557                                         msg_num
1558                                 );
1559                         }
1560                 }
1561                 return(r);
1562         }
1563
1564         /*
1565          * Fetch the message from disk.  If we're in HEADERS_FAST mode,
1566          * request that we don't even bother loading the body into memory.
1567          */
1568         if (headers_only == HEADERS_FAST) {
1569                 TheMessage = CtdlFetchMessage(msg_num, 0);
1570         }
1571         else {
1572                 TheMessage = CtdlFetchMessage(msg_num, 1);
1573         }
1574
1575         if (TheMessage == NULL) {
1576                 if (do_proto) cprintf("%d Can't locate msg %ld on disk\n",
1577                         ERROR + MESSAGE_NOT_FOUND, msg_num);
1578                 return(om_no_such_msg);
1579         }
1580
1581         /* Here is the weird form of this command, to process only an
1582          * encapsulated message/rfc822 section.
1583          */
1584         if (section) if (!IsEmptyStr(section)) if (strcmp(section, "0")) {
1585                 memset(&encap, 0, sizeof encap);
1586                 safestrncpy(encap.desired_section, section, sizeof encap.desired_section);
1587                 mime_parser(TheMessage->cm_fields[eMesageText],
1588                         NULL,
1589                         *extract_encapsulated_message,
1590                         NULL, NULL, (void *)&encap, 0
1591                 );
1592
1593                 if ((Author != NULL) && (*Author == NULL))
1594                 {
1595                         *Author = TheMessage->cm_fields[eAuthor];
1596                         TheMessage->cm_fields[eAuthor] = NULL;
1597                 }
1598                 if ((Address != NULL) && (*Address == NULL))
1599                 {
1600                         *Address = TheMessage->cm_fields[erFc822Addr];
1601                         TheMessage->cm_fields[erFc822Addr] = NULL;
1602                 }
1603                 CM_Free(TheMessage);
1604                 TheMessage = NULL;
1605
1606                 if (encap.msg) {
1607                         encap.msg[encap.msglen] = 0;
1608                         TheMessage = convert_internet_message(encap.msg);
1609                         encap.msg = NULL;       /* no free() here, TheMessage owns it now */
1610
1611                         /* Now we let it fall through to the bottom of this
1612                          * function, because TheMessage now contains the
1613                          * encapsulated message instead of the top-level
1614                          * message.  Isn't that neat?
1615                          */
1616                 }
1617                 else {
1618                         if (do_proto) {
1619                                 cprintf("%d msg %ld has no part %s\n",
1620                                         ERROR + MESSAGE_NOT_FOUND,
1621                                         msg_num,
1622                                         section);
1623                         }
1624                         retcode = om_no_such_msg;
1625                 }
1626
1627         }
1628
1629         /* Ok, output the message now */
1630         if (retcode == CIT_OK)
1631                 retcode = CtdlOutputPreLoadedMsg(TheMessage, mode, headers_only, do_proto, crlf, flags);
1632         if ((Author != NULL) && (*Author == NULL))
1633         {
1634                 *Author = TheMessage->cm_fields[eAuthor];
1635                 TheMessage->cm_fields[eAuthor] = NULL;
1636         }
1637         if ((Address != NULL) && (*Address == NULL))
1638         {
1639                 *Address = TheMessage->cm_fields[erFc822Addr];
1640                 TheMessage->cm_fields[erFc822Addr] = NULL;
1641         }
1642
1643         CM_Free(TheMessage);
1644
1645         return(retcode);
1646 }
1647
1648
1649
1650 void OutputCtdlMsgHeaders(
1651         struct CtdlMessage *TheMessage,
1652         int do_proto)           /* do Citadel protocol responses? */
1653 {
1654         int i;
1655         int suppress_f = 0;
1656         char buf[SIZ];
1657         char display_name[256];
1658
1659         /* begin header processing loop for Citadel message format */
1660         safestrncpy(display_name, "<unknown>", sizeof display_name);
1661         if (!CM_IsEmpty(TheMessage, eAuthor)) {
1662                 strcpy(buf, TheMessage->cm_fields[eAuthor]);
1663                 if (TheMessage->cm_anon_type == MES_ANONONLY) {
1664                         safestrncpy(display_name, "****", sizeof display_name);
1665                 }
1666                 else if (TheMessage->cm_anon_type == MES_ANONOPT) {
1667                         safestrncpy(display_name, "anonymous", sizeof display_name);
1668                 }
1669                 else {
1670                         safestrncpy(display_name, buf, sizeof display_name);
1671                 }
1672                 if ((is_room_aide())
1673                     && ((TheMessage->cm_anon_type == MES_ANONONLY)
1674                         || (TheMessage->cm_anon_type == MES_ANONOPT))) {
1675                         size_t tmp = strlen(display_name);
1676                         snprintf(&display_name[tmp],
1677                                  sizeof display_name - tmp,
1678                                  " [%s]", buf);
1679                 }
1680         }
1681
1682         /* Don't show Internet address for users on the
1683          * local Citadel network.
1684          */
1685         suppress_f = 0;
1686         if (!CM_IsEmpty(TheMessage, eNodeName) &&
1687             (haschar(TheMessage->cm_fields[eNodeName], '.') == 0))
1688         {
1689                 suppress_f = 1;
1690         }
1691
1692         /* Now spew the header fields in the order we like them. */
1693         for (i=0; i< NDiskFields; ++i) {
1694                 eMsgField Field;
1695                 Field = FieldOrder[i];
1696                 if (Field != eMesageText) {
1697                         if ( (!CM_IsEmpty(TheMessage, Field))
1698                              && (msgkeys[Field] != NULL) ) {
1699                                 if ((Field == eenVelopeTo) ||
1700                                     (Field == eRecipient) ||
1701                                     (Field == eCarbonCopY)) {
1702                                         sanitize_truncated_recipient(TheMessage->cm_fields[Field]);
1703                                 }
1704                                 if (Field == eAuthor) {
1705                                         if (do_proto) cprintf("%s=%s\n",
1706                                                               msgkeys[Field],
1707                                                               display_name);
1708                                 }
1709                                 else if ((Field == erFc822Addr) && (suppress_f)) {
1710                                         /* do nothing */
1711                                 }
1712                                 /* Masquerade display name if needed */
1713                                 else {
1714                                         if (do_proto) cprintf("%s=%s\n",
1715                                                               msgkeys[Field],
1716                                                               TheMessage->cm_fields[Field]
1717                                                 );
1718                                 }
1719                         }
1720                 }
1721         }
1722
1723 }
1724
1725 void OutputRFC822MsgHeaders(
1726         struct CtdlMessage *TheMessage,
1727         int flags,              /* should the bessage be exported clean */
1728         const char *nl,
1729         char *mid, long sizeof_mid,
1730         char *suser, long sizeof_suser,
1731         char *luser, long sizeof_luser,
1732         char *fuser, long sizeof_fuser,
1733         char *snode, long sizeof_snode)
1734 {
1735         char datestamp[100];
1736         int subject_found = 0;
1737         char buf[SIZ];
1738         int i, j, k;
1739         char *mptr = NULL;
1740         char *mpptr = NULL;
1741         char *hptr;
1742
1743         for (i = 0; i < 256; ++i) {
1744                 if (TheMessage->cm_fields[i]) {
1745                         mptr = mpptr = TheMessage->cm_fields[i];
1746
1747                         if (i == eAuthor) {
1748                                 safestrncpy(luser, mptr, sizeof_luser);
1749                                 safestrncpy(suser, mptr, sizeof_suser);
1750                         }
1751                         else if (i == 'Y') {
1752                                 if ((flags & QP_EADDR) != 0) {
1753                                         mptr = qp_encode_email_addrs(mptr);
1754                                 }
1755                                 sanitize_truncated_recipient(mptr);
1756                                 cprintf("CC: %s%s", mptr, nl);
1757                         }
1758                         else if (i == 'P') {
1759                                 cprintf("Return-Path: %s%s", mptr, nl);
1760                         }
1761                         else if (i == eListID) {
1762                                 cprintf("List-ID: %s%s", mptr, nl);
1763                         }
1764                         else if (i == 'V') {
1765                                 if ((flags & QP_EADDR) != 0)
1766                                         mptr = qp_encode_email_addrs(mptr);
1767                                 hptr = mptr;
1768                                 while ((*hptr != '\0') && isspace(*hptr))
1769                                         hptr ++;
1770                                 if (!IsEmptyStr(hptr))
1771                                         cprintf("Envelope-To: %s%s", hptr, nl);
1772                         }
1773                         else if (i == 'U') {
1774                                 cprintf("Subject: %s%s", mptr, nl);
1775                                 subject_found = 1;
1776                         }
1777                         else if (i == 'I')
1778                                 safestrncpy(mid, mptr, sizeof_mid); /// TODO: detect @ here and copy @nodename in if not found.
1779                         else if (i == erFc822Addr)
1780                                 safestrncpy(fuser, mptr, sizeof_fuser);
1781                         /* else if (i == 'O')
1782                            cprintf("X-Citadel-Room: %s%s",
1783                            mptr, nl); */
1784                         else if (i == 'N')
1785                                 safestrncpy(snode, mptr, sizeof_snode);
1786                         else if (i == 'R')
1787                         {
1788                                 if (haschar(mptr, '@') == 0)
1789                                 {
1790                                         sanitize_truncated_recipient(mptr);
1791                                         cprintf("To: %s@%s", mptr, config.c_fqdn);
1792                                         cprintf("%s", nl);
1793                                 }
1794                                 else
1795                                 {
1796                                         if ((flags & QP_EADDR) != 0) {
1797                                                 mptr = qp_encode_email_addrs(mptr);
1798                                         }
1799                                         sanitize_truncated_recipient(mptr);
1800                                         cprintf("To: %s", mptr);
1801                                         cprintf("%s", nl);
1802                                 }
1803                         }
1804                         else if (i == 'T') {
1805                                 datestring(datestamp, sizeof datestamp,
1806                                            atol(mptr), DATESTRING_RFC822);
1807                                 cprintf("Date: %s%s", datestamp, nl);
1808                         }
1809                         else if (i == 'W') {
1810                                 cprintf("References: ");
1811                                 k = num_tokens(mptr, '|');
1812                                 for (j=0; j<k; ++j) {
1813                                         extract_token(buf, mptr, j, '|', sizeof buf);
1814                                         cprintf("<%s>", buf);
1815                                         if (j == (k-1)) {
1816                                                 cprintf("%s", nl);
1817                                         }
1818                                         else {
1819                                                 cprintf(" ");
1820                                         }
1821                                 }
1822                         }
1823                         else if (i == eReplyTo) {
1824                                 hptr = mptr;
1825                                 while ((*hptr != '\0') && isspace(*hptr))
1826                                         hptr ++;
1827                                 if (!IsEmptyStr(hptr))
1828                                         cprintf("Reply-To: %s%s", mptr, nl);
1829                         }
1830                         if (mptr != mpptr)
1831                                 free (mptr);
1832                 }
1833         }
1834         if (subject_found == 0) {
1835                 cprintf("Subject: (no subject)%s", nl);
1836         }
1837 }
1838
1839
1840 void Dump_RFC822HeadersBody(
1841         struct CtdlMessage *TheMessage,
1842         int headers_only,       /* eschew the message body? */
1843         int flags,              /* should the bessage be exported clean? */
1844
1845         const char *nl)
1846 {
1847         cit_uint8_t prev_ch;
1848         int eoh = 0;
1849         const char *StartOfText = StrBufNOTNULL;
1850         char outbuf[1024];
1851         int outlen = 0;
1852         int nllen = strlen(nl);
1853         char *mptr;
1854
1855         mptr = TheMessage->cm_fields[eMesageText];
1856
1857
1858         prev_ch = '\0';
1859         while (*mptr != '\0') {
1860                 if (*mptr == '\r') {
1861                         /* do nothing */
1862                 }
1863                 else {
1864                         if ((!eoh) &&
1865                             (*mptr == '\n'))
1866                         {
1867                                 eoh = (*(mptr+1) == '\r') && (*(mptr+2) == '\n');
1868                                 if (!eoh)
1869                                         eoh = *(mptr+1) == '\n';
1870                                 if (eoh)
1871                                 {
1872                                         StartOfText = mptr;
1873                                         StartOfText = strchr(StartOfText, '\n');
1874                                         StartOfText = strchr(StartOfText, '\n');
1875                                 }
1876                         }
1877                         if (((headers_only == HEADERS_NONE) && (mptr >= StartOfText)) ||
1878                             ((headers_only == HEADERS_ONLY) && (mptr < StartOfText)) ||
1879                             ((headers_only != HEADERS_NONE) &&
1880                              (headers_only != HEADERS_ONLY))
1881                                 ) {
1882                                 if (*mptr == '\n') {
1883                                         memcpy(&outbuf[outlen], nl, nllen);
1884                                         outlen += nllen;
1885                                         outbuf[outlen] = '\0';
1886                                 }
1887                                 else {
1888                                         outbuf[outlen++] = *mptr;
1889                                 }
1890                         }
1891                 }
1892                 if (flags & ESC_DOT)
1893                 {
1894                         if ((prev_ch == '\n') &&
1895                             (*mptr == '.') &&
1896                             ((*(mptr+1) == '\r') || (*(mptr+1) == '\n')))
1897                         {
1898                                 outbuf[outlen++] = '.';
1899                         }
1900                         prev_ch = *mptr;
1901                 }
1902                 ++mptr;
1903                 if (outlen > 1000) {
1904                         if (client_write(outbuf, outlen) == -1)
1905                         {
1906                                 struct CitContext *CCC = CC;
1907                                 MSGM_syslog(LOG_ERR, "Dump_RFC822HeadersBody(): aborting due to write failure.\n");
1908                                 return;
1909                         }
1910                         outlen = 0;
1911                 }
1912         }
1913         if (outlen > 0) {
1914                 client_write(outbuf, outlen);
1915         }
1916 }
1917
1918
1919
1920 /* If the format type on disk is 1 (fixed-format), then we want
1921  * everything to be output completely literally ... regardless of
1922  * what message transfer format is in use.
1923  */
1924 void DumpFormatFixed(
1925         struct CtdlMessage *TheMessage,
1926         int mode,               /* how would you like that message? */
1927         const char *nl)
1928 {
1929         cit_uint8_t ch;
1930         char buf[SIZ];
1931         int buflen;
1932         int xlline = 0;
1933         int nllen = strlen (nl);
1934         char *mptr;
1935
1936         mptr = TheMessage->cm_fields[eMesageText];
1937
1938         if (mode == MT_MIME) {
1939                 cprintf("Content-type: text/plain\n\n");
1940         }
1941         *buf = '\0';
1942         buflen = 0;
1943         while (ch = *mptr++, ch > 0) {
1944                 if (ch == '\n')
1945                         ch = '\r';
1946
1947                 if ((buflen > 250) && (!xlline)){
1948                         int tbuflen;
1949                         tbuflen = buflen;
1950
1951                         while ((buflen > 0) &&
1952                                (!isspace(buf[buflen])))
1953                                 buflen --;
1954                         if (buflen == 0) {
1955                                 xlline = 1;
1956                         }
1957                         else {
1958                                 mptr -= tbuflen - buflen;
1959                                 buf[buflen] = '\0';
1960                                 ch = '\r';
1961                         }
1962                 }
1963                 /* if we reach the outer bounds of our buffer,
1964                    abort without respect what whe purge. */
1965                 if (xlline &&
1966                     ((isspace(ch)) ||
1967                      (buflen > SIZ - nllen - 2)))
1968                         ch = '\r';
1969
1970                 if (ch == '\r') {
1971                         memcpy (&buf[buflen], nl, nllen);
1972                         buflen += nllen;
1973                         buf[buflen] = '\0';
1974
1975                         if (client_write(buf, buflen) == -1)
1976                         {
1977                                 struct CitContext *CCC = CC;
1978                                 MSGM_syslog(LOG_ERR, "DumpFormatFixed(): aborting due to write failure.\n");
1979                                 return;
1980                         }
1981                         *buf = '\0';
1982                         buflen = 0;
1983                         xlline = 0;
1984                 } else {
1985                         buf[buflen] = ch;
1986                         buflen++;
1987                 }
1988         }
1989         buf[buflen] = '\0';
1990         if (!IsEmptyStr(buf))
1991                 cprintf("%s%s", buf, nl);
1992 }
1993
1994 /*
1995  * Get a message off disk.  (returns om_* values found in msgbase.h)
1996  */
1997 int CtdlOutputPreLoadedMsg(
1998                 struct CtdlMessage *TheMessage,
1999                 int mode,               /* how would you like that message? */
2000                 int headers_only,       /* eschew the message body? */
2001                 int do_proto,           /* do Citadel protocol responses? */
2002                 int crlf,               /* Use CRLF newlines instead of LF? */
2003                 int flags               /* should the bessage be exported clean? */
2004 ) {
2005         struct CitContext *CCC = CC;
2006         int i;
2007         char *mptr = NULL;
2008         const char *nl; /* newline string */
2009         struct ma_info ma;
2010
2011         /* Buffers needed for RFC822 translation.  These are all filled
2012          * using functions that are bounds-checked, and therefore we can
2013          * make them substantially smaller than SIZ.
2014          */
2015         char suser[100];
2016         char luser[100];
2017         char fuser[100];
2018         char snode[100];
2019         char mid[100];
2020
2021         MSG_syslog(LOG_DEBUG, "CtdlOutputPreLoadedMsg(TheMessage=%s, %d, %d, %d, %d\n",
2022                    ((TheMessage == NULL) ? "NULL" : "not null"),
2023                    mode, headers_only, do_proto, crlf);
2024
2025         strcpy(mid, "unknown");
2026         nl = (crlf ? "\r\n" : "\n");
2027
2028         if (!CM_IsValidMsg(TheMessage)) {
2029                 MSGM_syslog(LOG_ERR,
2030                             "ERROR: invalid preloaded message for output\n");
2031                 cit_backtrace ();
2032                 return(om_no_such_msg);
2033         }
2034
2035         /* Suppress envelope recipients if required to avoid disclosing BCC addresses.
2036          * Pad it with spaces in order to avoid changing the RFC822 length of the message.
2037          */
2038         if ( (flags & SUPPRESS_ENV_TO) && (!CM_IsEmpty(TheMessage, eenVelopeTo)) ) {
2039                 memset(TheMessage->cm_fields[eenVelopeTo], ' ', strlen(TheMessage->cm_fields[eenVelopeTo]));
2040         }
2041
2042         /* Are we downloading a MIME component? */
2043         if (mode == MT_DOWNLOAD) {
2044                 if (TheMessage->cm_format_type != FMT_RFC822) {
2045                         if (do_proto)
2046                                 cprintf("%d This is not a MIME message.\n",
2047                                 ERROR + ILLEGAL_VALUE);
2048                 } else if (CCC->download_fp != NULL) {
2049                         if (do_proto) cprintf(
2050                                 "%d You already have a download open.\n",
2051                                 ERROR + RESOURCE_BUSY);
2052                 } else {
2053                         /* Parse the message text component */
2054                         mptr = TheMessage->cm_fields[eMesageText];
2055                         mime_parser(mptr, NULL, *mime_download, NULL, NULL, NULL, 0);
2056                         /* If there's no file open by this time, the requested
2057                          * section wasn't found, so print an error
2058                          */
2059                         if (CCC->download_fp == NULL) {
2060                                 if (do_proto) cprintf(
2061                                         "%d Section %s not found.\n",
2062                                         ERROR + FILE_NOT_FOUND,
2063                                         CCC->download_desired_section);
2064                         }
2065                 }
2066                 return((CCC->download_fp != NULL) ? om_ok : om_mime_error);
2067         }
2068
2069         /* MT_SPEW_SECTION is like MT_DOWNLOAD except it outputs the whole MIME part
2070          * in a single server operation instead of opening a download file.
2071          */
2072         if (mode == MT_SPEW_SECTION) {
2073                 if (TheMessage->cm_format_type != FMT_RFC822) {
2074                         if (do_proto)
2075                                 cprintf("%d This is not a MIME message.\n",
2076                                 ERROR + ILLEGAL_VALUE);
2077                 } else {
2078                         /* Parse the message text component */
2079                         int found_it = 0;
2080
2081                         mptr = TheMessage->cm_fields[eMesageText];
2082                         mime_parser(mptr, NULL, *mime_spew_section, NULL, NULL, (void *)&found_it, 0);
2083                         /* If section wasn't found, print an error
2084                          */
2085                         if (!found_it) {
2086                                 if (do_proto) cprintf(
2087                                         "%d Section %s not found.\n",
2088                                         ERROR + FILE_NOT_FOUND,
2089                                         CCC->download_desired_section);
2090                         }
2091                 }
2092                 return((CCC->download_fp != NULL) ? om_ok : om_mime_error);
2093         }
2094
2095         /* now for the user-mode message reading loops */
2096         if (do_proto) cprintf("%d msg:\n", LISTING_FOLLOWS);
2097
2098         /* Does the caller want to skip the headers? */
2099         if (headers_only == HEADERS_NONE) goto START_TEXT;
2100
2101         /* Tell the client which format type we're using. */
2102         if ( (mode == MT_CITADEL) && (do_proto) ) {
2103                 cprintf("type=%d\n", TheMessage->cm_format_type);
2104         }
2105
2106         /* nhdr=yes means that we're only displaying headers, no body */
2107         if ( (TheMessage->cm_anon_type == MES_ANONONLY)
2108            && ((mode == MT_CITADEL) || (mode == MT_MIME))
2109            && (do_proto)
2110            ) {
2111                 cprintf("nhdr=yes\n");
2112         }
2113
2114         if ((mode == MT_CITADEL) || (mode == MT_MIME))
2115                 OutputCtdlMsgHeaders(TheMessage, do_proto);
2116
2117
2118         /* begin header processing loop for RFC822 transfer format */
2119         strcpy(suser, "");
2120         strcpy(luser, "");
2121         strcpy(fuser, "");
2122         strcpy(snode, NODENAME);
2123         if (mode == MT_RFC822)
2124                 OutputRFC822MsgHeaders(
2125                         TheMessage,
2126                         flags,
2127                         nl,
2128                         mid, sizeof(mid),
2129                         suser, sizeof(suser),
2130                         luser, sizeof(luser),
2131                         fuser, sizeof(fuser),
2132                         snode, sizeof(snode)
2133                         );
2134
2135
2136         for (i=0; !IsEmptyStr(&suser[i]); ++i) {
2137                 suser[i] = tolower(suser[i]);
2138                 if (!isalnum(suser[i])) suser[i]='_';
2139         }
2140
2141         if (mode == MT_RFC822) {
2142                 if (!strcasecmp(snode, NODENAME)) {
2143                         safestrncpy(snode, FQDN, sizeof snode);
2144                 }
2145
2146                 /* Construct a fun message id */
2147                 cprintf("Message-ID: <%s", mid);/// todo: this possibly breaks threadding mails.
2148                 if (strchr(mid, '@')==NULL) {
2149                         cprintf("@%s", snode);
2150                 }
2151                 cprintf(">%s", nl);
2152
2153                 if (!is_room_aide() && (TheMessage->cm_anon_type == MES_ANONONLY)) {
2154                         cprintf("From: \"----\" <x@x.org>%s", nl);
2155                 }
2156                 else if (!is_room_aide() && (TheMessage->cm_anon_type == MES_ANONOPT)) {
2157                         cprintf("From: \"anonymous\" <x@x.org>%s", nl);
2158                 }
2159                 else if (!IsEmptyStr(fuser)) {
2160                         cprintf("From: \"%s\" <%s>%s", luser, fuser, nl);
2161                 }
2162                 else {
2163                         cprintf("From: \"%s\" <%s@%s>%s", luser, suser, snode, nl);
2164                 }
2165
2166                 /* Blank line signifying RFC822 end-of-headers */
2167                 if (TheMessage->cm_format_type != FMT_RFC822) {
2168                         cprintf("%s", nl);
2169                 }
2170         }
2171
2172         /* end header processing loop ... at this point, we're in the text */
2173 START_TEXT:
2174         if (headers_only == HEADERS_FAST) goto DONE;
2175
2176         /* Tell the client about the MIME parts in this message */
2177         if (TheMessage->cm_format_type == FMT_RFC822) {
2178                 if ( (mode == MT_CITADEL) || (mode == MT_MIME) ) {
2179                         mptr = TheMessage->cm_fields[eMesageText];
2180                         memset(&ma, 0, sizeof(struct ma_info));
2181                         mime_parser(mptr, NULL,
2182                                 (do_proto ? *list_this_part : NULL),
2183                                 (do_proto ? *list_this_pref : NULL),
2184                                 (do_proto ? *list_this_suff : NULL),
2185                                 (void *)&ma, 1);
2186                 }
2187                 else if (mode == MT_RFC822) {   /* unparsed RFC822 dump */
2188                         Dump_RFC822HeadersBody(
2189                                 TheMessage,
2190                                 headers_only,
2191                                 flags,
2192                                 nl);
2193                         goto DONE;
2194                 }
2195         }
2196
2197         if (headers_only == HEADERS_ONLY) {
2198                 goto DONE;
2199         }
2200
2201         /* signify start of msg text */
2202         if ( (mode == MT_CITADEL) || (mode == MT_MIME) ) {
2203                 if (do_proto) cprintf("text\n");
2204         }
2205
2206         if (TheMessage->cm_format_type == FMT_FIXED)
2207                 DumpFormatFixed(
2208                         TheMessage,
2209                         mode,           /* how would you like that message? */
2210                         nl);
2211
2212         /* If the message on disk is format 0 (Citadel vari-format), we
2213          * output using the formatter at 80 columns.  This is the final output
2214          * form if the transfer format is RFC822, but if the transfer format
2215          * is Citadel proprietary, it'll still work, because the indentation
2216          * for new paragraphs is correct and the client will reformat the
2217          * message to the reader's screen width.
2218          */
2219         if (TheMessage->cm_format_type == FMT_CITADEL) {
2220                 mptr = TheMessage->cm_fields[eMesageText];
2221
2222                 if (mode == MT_MIME) {
2223                         cprintf("Content-type: text/x-citadel-variformat\n\n");
2224                 }
2225                 memfmout(mptr, nl);
2226         }
2227
2228         /* If the message on disk is format 4 (MIME), we've gotta hand it
2229          * off to the MIME parser.  The client has already been told that
2230          * this message is format 1 (fixed format), so the callback function
2231          * we use will display those parts as-is.
2232          */
2233         if (TheMessage->cm_format_type == FMT_RFC822) {
2234                 memset(&ma, 0, sizeof(struct ma_info));
2235
2236                 if (mode == MT_MIME) {
2237                         ma.use_fo_hooks = 0;
2238                         strcpy(ma.chosen_part, "1");
2239                         ma.chosen_pref = 9999;
2240                         ma.dont_decode = CCC->msg4_dont_decode;
2241                         mime_parser(mptr, NULL,
2242                                 *choose_preferred, *fixed_output_pre,
2243                                 *fixed_output_post, (void *)&ma, 1);
2244                         mime_parser(mptr, NULL,
2245                                 *output_preferred, NULL, NULL, (void *)&ma, 1);
2246                 }
2247                 else {
2248                         ma.use_fo_hooks = 1;
2249                         mime_parser(mptr, NULL,
2250                                 *fixed_output, *fixed_output_pre,
2251                                 *fixed_output_post, (void *)&ma, 0);
2252                 }
2253
2254         }
2255
2256 DONE:   /* now we're done */
2257         if (do_proto) cprintf("000\n");
2258         return(om_ok);
2259 }
2260
2261 /*
2262  * Save one or more message pointers into a specified room
2263  * (Returns 0 for success, nonzero for failure)
2264  * roomname may be NULL to use the current room
2265  *
2266  * Note that the 'supplied_msg' field may be set to NULL, in which case
2267  * the message will be fetched from disk, by number, if we need to perform
2268  * replication checks.  This adds an additional database read, so if the
2269  * caller already has the message in memory then it should be supplied.  (Obviously
2270  * this mode of operation only works if we're saving a single message.)
2271  */
2272 int CtdlSaveMsgPointersInRoom(char *roomname, long newmsgidlist[], int num_newmsgs,
2273                         int do_repl_check, struct CtdlMessage *supplied_msg, int suppress_refcount_adj
2274 ) {
2275         struct CitContext *CCC = CC;
2276         int i, j, unique;
2277         char hold_rm[ROOMNAMELEN];
2278         struct cdbdata *cdbfr;
2279         int num_msgs;
2280         long *msglist;
2281         long highest_msg = 0L;
2282
2283         long msgid = 0;
2284         struct CtdlMessage *msg = NULL;
2285
2286         long *msgs_to_be_merged = NULL;
2287         int num_msgs_to_be_merged = 0;
2288
2289         MSG_syslog(LOG_DEBUG,
2290                    "CtdlSaveMsgPointersInRoom(room=%s, num_msgs=%d, repl=%d, suppress_rca=%d)\n",
2291                    roomname, num_newmsgs, do_repl_check, suppress_refcount_adj
2292         );
2293
2294         strcpy(hold_rm, CCC->room.QRname);
2295
2296         /* Sanity checks */
2297         if (newmsgidlist == NULL) return(ERROR + INTERNAL_ERROR);
2298         if (num_newmsgs < 1) return(ERROR + INTERNAL_ERROR);
2299         if (num_newmsgs > 1) supplied_msg = NULL;
2300
2301         /* Now the regular stuff */
2302         if (CtdlGetRoomLock(&CCC->room,
2303            ((roomname != NULL) ? roomname : CCC->room.QRname) )
2304            != 0) {
2305                 MSG_syslog(LOG_ERR, "No such room <%s>\n", roomname);
2306                 return(ERROR + ROOM_NOT_FOUND);
2307         }
2308
2309
2310         msgs_to_be_merged = malloc(sizeof(long) * num_newmsgs);
2311         num_msgs_to_be_merged = 0;
2312
2313
2314         cdbfr = cdb_fetch(CDB_MSGLISTS, &CCC->room.QRnumber, sizeof(long));
2315         if (cdbfr == NULL) {
2316                 msglist = NULL;
2317                 num_msgs = 0;
2318         } else {
2319                 msglist = (long *) cdbfr->ptr;
2320                 cdbfr->ptr = NULL;      /* CtdlSaveMsgPointerInRoom() now owns this memory */
2321                 num_msgs = cdbfr->len / sizeof(long);
2322                 cdb_free(cdbfr);
2323         }
2324
2325
2326         /* Create a list of msgid's which were supplied by the caller, but do
2327          * not already exist in the target room.  It is absolutely taboo to
2328          * have more than one reference to the same message in a room.
2329          */
2330         for (i=0; i<num_newmsgs; ++i) {
2331                 unique = 1;
2332                 if (num_msgs > 0) for (j=0; j<num_msgs; ++j) {
2333                         if (msglist[j] == newmsgidlist[i]) {
2334                                 unique = 0;
2335                         }
2336                 }
2337                 if (unique) {
2338                         msgs_to_be_merged[num_msgs_to_be_merged++] = newmsgidlist[i];
2339                 }
2340         }
2341
2342         MSG_syslog(LOG_DEBUG, "%d unique messages to be merged\n", num_msgs_to_be_merged);
2343
2344         /*
2345          * Now merge the new messages
2346          */
2347         msglist = realloc(msglist, (sizeof(long) * (num_msgs + num_msgs_to_be_merged)) );
2348         if (msglist == NULL) {
2349                 MSGM_syslog(LOG_ALERT, "ERROR: can't realloc message list!\n");
2350                 free(msgs_to_be_merged);
2351                 return (ERROR + INTERNAL_ERROR);
2352         }
2353         memcpy(&msglist[num_msgs], msgs_to_be_merged, (sizeof(long) * num_msgs_to_be_merged) );
2354         num_msgs += num_msgs_to_be_merged;
2355
2356         /* Sort the message list, so all the msgid's are in order */
2357         num_msgs = sort_msglist(msglist, num_msgs);
2358
2359         /* Determine the highest message number */
2360         highest_msg = msglist[num_msgs - 1];
2361
2362         /* Write it back to disk. */
2363         cdb_store(CDB_MSGLISTS, &CCC->room.QRnumber, (int)sizeof(long),
2364                   msglist, (int)(num_msgs * sizeof(long)));
2365
2366         /* Free up the memory we used. */
2367         free(msglist);
2368
2369         /* Update the highest-message pointer and unlock the room. */
2370         CCC->room.QRhighest = highest_msg;
2371         CtdlPutRoomLock(&CCC->room);
2372
2373         /* Perform replication checks if necessary */
2374         if ( (DoesThisRoomNeedEuidIndexing(&CCC->room)) && (do_repl_check) ) {
2375                 MSGM_syslog(LOG_DEBUG, "CtdlSaveMsgPointerInRoom() doing repl checks\n");
2376
2377                 for (i=0; i<num_msgs_to_be_merged; ++i) {
2378                         msgid = msgs_to_be_merged[i];
2379
2380                         if (supplied_msg != NULL) {
2381                                 msg = supplied_msg;
2382                         }
2383                         else {
2384                                 msg = CtdlFetchMessage(msgid, 0);
2385                         }
2386
2387                         if (msg != NULL) {
2388                                 ReplicationChecks(msg);
2389
2390                                 /* If the message has an Exclusive ID, index that... */
2391                                 if (!CM_IsEmpty(msg, eExclusiveID)) {
2392                                         index_message_by_euid(msg->cm_fields[eExclusiveID], &CCC->room, msgid);
2393                                 }
2394
2395                                 /* Free up the memory we may have allocated */
2396                                 if (msg != supplied_msg) {
2397                                         CM_Free(msg);
2398                                 }
2399                         }
2400
2401                 }
2402         }
2403
2404         else {
2405                 MSGM_syslog(LOG_DEBUG, "CtdlSaveMsgPointerInRoom() skips repl checks\n");
2406         }
2407
2408         /* Submit this room for processing by hooks */
2409         PerformRoomHooks(&CCC->room);
2410
2411         /* Go back to the room we were in before we wandered here... */
2412         CtdlGetRoom(&CCC->room, hold_rm);
2413
2414         /* Bump the reference count for all messages which were merged */
2415         if (!suppress_refcount_adj) {
2416                 AdjRefCountList(msgs_to_be_merged, num_msgs_to_be_merged, +1);
2417         }
2418
2419         /* Free up memory... */
2420         if (msgs_to_be_merged != NULL) {
2421                 free(msgs_to_be_merged);
2422         }
2423
2424         /* Return success. */
2425         return (0);
2426 }
2427
2428
2429 /*
2430  * This is the same as CtdlSaveMsgPointersInRoom() but it only accepts
2431  * a single message.
2432  */
2433 int CtdlSaveMsgPointerInRoom(char *roomname, long msgid,
2434                              int do_repl_check, struct CtdlMessage *supplied_msg)
2435 {
2436         return CtdlSaveMsgPointersInRoom(roomname, &msgid, 1, do_repl_check, supplied_msg, 0);
2437 }
2438
2439
2440
2441
2442 /*
2443  * Message base operation to save a new message to the message store
2444  * (returns new message number)
2445  *
2446  * This is the back end for CtdlSubmitMsg() and should not be directly
2447  * called by server-side modules.
2448  *
2449  */
2450 long send_message(struct CtdlMessage *msg) {
2451         struct CitContext *CCC = CC;
2452         long newmsgid;
2453         long retval;
2454         char msgidbuf[256];
2455         long msgidbuflen;
2456         struct ser_ret smr;
2457         int is_bigmsg = 0;
2458         char *holdM = NULL;
2459         long oldMLen = 0;
2460
2461         /* Get a new message number */
2462         newmsgid = get_new_message_number();
2463         msgidbuflen = snprintf(msgidbuf, sizeof msgidbuf, "%08lX-%08lX@%s",
2464                                (long unsigned int) time(NULL),
2465                                (long unsigned int) newmsgid,
2466                                config.c_fqdn
2467                 );
2468
2469         /* Generate an ID if we don't have one already */
2470         if (CM_IsEmpty(msg, emessageId)) {
2471                 CM_SetField(msg, emessageId, msgidbuf, msgidbuflen);
2472         }
2473
2474         /* If the message is big, set its body aside for storage elsewhere */
2475         if (!CM_IsEmpty(msg, eMesageText)) {
2476                 if (msg->cm_lengths[eMesageText] > BIGMSG) {
2477                         is_bigmsg = 1;
2478                         holdM = msg->cm_fields[eMesageText];
2479                         msg->cm_fields[eMesageText] = NULL;
2480                         oldMLen = msg->cm_lengths[eMesageText];
2481                         msg->cm_lengths[eMesageText] = 0;
2482                 }
2483         }
2484
2485         /* Serialize our data structure for storage in the database */
2486         CtdlSerializeMessage(&smr, msg);
2487
2488         if (is_bigmsg) {
2489                 msg->cm_fields[eMesageText] = holdM;
2490         }
2491
2492         if (smr.len == 0) {
2493                 cprintf("%d Unable to serialize message\n",
2494                         ERROR + INTERNAL_ERROR);
2495                 return (-1L);
2496         }
2497
2498         /* Write our little bundle of joy into the message base */
2499         if (cdb_store(CDB_MSGMAIN, &newmsgid, (int)sizeof(long),
2500                       smr.ser, smr.len) < 0) {
2501                 MSGM_syslog(LOG_ERR, "Can't store message\n");
2502                 retval = 0L;
2503         } else {
2504                 if (is_bigmsg) {
2505                         cdb_store(CDB_BIGMSGS,
2506                                   &newmsgid,
2507                                   (int)sizeof(long),
2508                                   holdM,
2509                                   (oldMLen + 1)
2510                                 );
2511                 }
2512                 retval = newmsgid;
2513         }
2514
2515         /* Free the memory we used for the serialized message */
2516         free(smr.ser);
2517
2518         /* Return the *local* message ID to the caller
2519          * (even if we're storing an incoming network message)
2520          */
2521         return(retval);
2522 }
2523
2524
2525
2526 /*
2527  * Serialize a struct CtdlMessage into the format used on disk and network.
2528  *
2529  * This function loads up a "struct ser_ret" (defined in server.h) which
2530  * contains the length of the serialized message and a pointer to the
2531  * serialized message in memory.  THE LATTER MUST BE FREED BY THE CALLER.
2532  */
2533 void CtdlSerializeMessage(struct ser_ret *ret,          /* return values */
2534                        struct CtdlMessage *msg) /* unserialized msg */
2535 {
2536         struct CitContext *CCC = CC;
2537         size_t wlen;
2538         int i;
2539
2540         /*
2541          * Check for valid message format
2542          */
2543         if (CM_IsValidMsg(msg) == 0) {
2544                 MSGM_syslog(LOG_ERR, "CtdlSerializeMessage() aborting due to invalid message\n");
2545                 ret->len = 0;
2546                 ret->ser = NULL;
2547                 return;
2548         }
2549
2550         ret->len = 3;
2551         for (i=0; i < NDiskFields; ++i)
2552                 if (msg->cm_fields[FieldOrder[i]] != NULL)
2553                         ret->len += msg->cm_lengths[FieldOrder[i]] + 2;
2554
2555         ret->ser = malloc(ret->len);
2556         if (ret->ser == NULL) {
2557                 MSG_syslog(LOG_ERR, "CtdlSerializeMessage() malloc(%ld) failed: %s\n",
2558                            (long)ret->len, strerror(errno));
2559                 ret->len = 0;
2560                 ret->ser = NULL;
2561                 return;
2562         }
2563
2564         ret->ser[0] = 0xFF;
2565         ret->ser[1] = msg->cm_anon_type;
2566         ret->ser[2] = msg->cm_format_type;
2567         wlen = 3;
2568
2569         for (i=0; i < NDiskFields; ++i)
2570                 if (msg->cm_fields[FieldOrder[i]] != NULL)
2571                 {
2572                         ret->ser[wlen++] = (char)FieldOrder[i];
2573
2574                         memcpy(&ret->ser[wlen],
2575                                msg->cm_fields[FieldOrder[i]],
2576                                msg->cm_lengths[FieldOrder[i]] + 1);
2577
2578                         wlen = wlen + msg->cm_lengths[FieldOrder[i]] + 1;
2579                 }
2580
2581         if (ret->len != wlen) {
2582                 MSG_syslog(LOG_ERR, "ERROR: len=%ld wlen=%ld\n",
2583                            (long)ret->len, (long)wlen);
2584         }
2585
2586         return;
2587 }
2588
2589
2590 /*
2591  * Check to see if any messages already exist in the current room which
2592  * carry the same Exclusive ID as this one.  If any are found, delete them.
2593  */
2594 void ReplicationChecks(struct CtdlMessage *msg) {
2595         struct CitContext *CCC = CC;
2596         long old_msgnum = (-1L);
2597
2598         if (DoesThisRoomNeedEuidIndexing(&CCC->room) == 0) return;
2599
2600         MSG_syslog(LOG_DEBUG, "Performing replication checks in <%s>\n",
2601                    CCC->room.QRname);
2602
2603         /* No exclusive id?  Don't do anything. */
2604         if (msg == NULL) return;
2605         if (CM_IsEmpty(msg, eExclusiveID)) return;
2606
2607         /*MSG_syslog(LOG_DEBUG, "Exclusive ID: <%s> for room <%s>\n",
2608           msg->cm_fields[eExclusiveID], CCC->room.QRname);*/
2609
2610         old_msgnum = CtdlLocateMessageByEuid(msg->cm_fields[eExclusiveID], &CCC->room);
2611         if (old_msgnum > 0L) {
2612                 MSG_syslog(LOG_DEBUG, "ReplicationChecks() replacing message %ld\n", old_msgnum);
2613                 CtdlDeleteMessages(CCC->room.QRname, &old_msgnum, 1, "");
2614         }
2615 }
2616
2617
2618
2619 /*
2620  * Save a message to disk and submit it into the delivery system.
2621  */
2622 long CtdlSubmitMsg(struct CtdlMessage *msg,     /* message to save */
2623                    recptypes *recps,            /* recipients (if mail) */
2624                    const char *force,           /* force a particular room? */
2625                    int flags                    /* should the message be exported clean? */
2626         )
2627 {
2628         char hold_rm[ROOMNAMELEN];
2629         char actual_rm[ROOMNAMELEN];
2630         char force_room[ROOMNAMELEN];
2631         char content_type[SIZ];                 /* We have to learn this */
2632         char recipient[SIZ];
2633         char bounce_to[1024];
2634         const char *room;
2635         long newmsgid;
2636         const char *mptr = NULL;
2637         struct ctdluser userbuf;
2638         int a, i;
2639         struct MetaData smi;
2640         char *collected_addresses = NULL;
2641         struct addresses_to_be_filed *aptr = NULL;
2642         StrBuf *saved_rfc822_version = NULL;
2643         int qualified_for_journaling = 0;
2644         CitContext *CCC = MyContext();
2645
2646         MSGM_syslog(LOG_DEBUG, "CtdlSubmitMsg() called\n");
2647         if (CM_IsValidMsg(msg) == 0) return(-1);        /* self check */
2648
2649         /* If this message has no timestamp, we take the liberty of
2650          * giving it one, right now.
2651          */
2652         if (CM_IsEmpty(msg, eTimestamp)) {
2653                 CM_SetFieldLONG(msg, eTimestamp, time(NULL));
2654         }
2655
2656         /* If this message has no path, we generate one.
2657          */
2658         if (CM_IsEmpty(msg, eMessagePath)) {
2659                 if (!CM_IsEmpty(msg, eAuthor)) {
2660                         CM_CopyField(msg, eMessagePath, eAuthor);
2661                         for (a=0; !IsEmptyStr(&msg->cm_fields[eMessagePath][a]); ++a) {
2662                                 if (isspace(msg->cm_fields[eMessagePath][a])) {
2663                                         msg->cm_fields[eMessagePath][a] = ' ';
2664                                 }
2665                         }
2666                 }
2667                 else {
2668                         CM_SetField(msg, eMessagePath, HKEY("unknown"));
2669                 }
2670         }
2671
2672         if (force == NULL) {
2673                 force_room[0] = '\0';
2674         }
2675         else {
2676                 strcpy(force_room, force);
2677         }
2678
2679         /* Learn about what's inside, because it's what's inside that counts */
2680         if (CM_IsEmpty(msg, eMesageText)) {
2681                 MSGM_syslog(LOG_ERR, "ERROR: attempt to save message with NULL body\n");
2682                 return(-2);
2683         }
2684
2685         switch (msg->cm_format_type) {
2686         case 0:
2687                 strcpy(content_type, "text/x-citadel-variformat");
2688                 break;
2689         case 1:
2690                 strcpy(content_type, "text/plain");
2691                 break;
2692         case 4:
2693                 strcpy(content_type, "text/plain");
2694                 mptr = bmstrcasestr(msg->cm_fields[eMesageText], "Content-type:");
2695                 if (mptr != NULL) {
2696                         char *aptr;
2697                         safestrncpy(content_type, &mptr[13], sizeof content_type);
2698                         striplt(content_type);
2699                         aptr = content_type;
2700                         while (!IsEmptyStr(aptr)) {
2701                                 if ((*aptr == ';')
2702                                     || (*aptr == ' ')
2703                                     || (*aptr == 13)
2704                                     || (*aptr == 10)) {
2705                                         *aptr = 0;
2706                                 }
2707                                 else aptr++;
2708                         }
2709                 }
2710         }
2711
2712         /* Goto the correct room */
2713         room = (recps) ? CCC->room.QRname : SENTITEMS;
2714         MSG_syslog(LOG_DEBUG, "Selected room %s\n", room);
2715         strcpy(hold_rm, CCC->room.QRname);
2716         strcpy(actual_rm, CCC->room.QRname);
2717         if (recps != NULL) {
2718                 strcpy(actual_rm, SENTITEMS);
2719         }
2720
2721         /* If the user is a twit, move to the twit room for posting */
2722         if (TWITDETECT) {
2723                 if (CCC->user.axlevel == AxProbU) {
2724                         strcpy(hold_rm, actual_rm);
2725                         strcpy(actual_rm, config.c_twitroom);
2726                         MSGM_syslog(LOG_DEBUG, "Diverting to twit room\n");
2727                 }
2728         }
2729
2730         /* ...or if this message is destined for Aide> then go there. */
2731         if (!IsEmptyStr(force_room)) {
2732                 strcpy(actual_rm, force_room);
2733         }
2734
2735         MSG_syslog(LOG_INFO, "Final selection: %s (%s)\n", actual_rm, room);
2736         if (strcasecmp(actual_rm, CCC->room.QRname)) {
2737                 /* CtdlGetRoom(&CCC->room, actual_rm); */
2738                 CtdlUserGoto(actual_rm, 0, 1, NULL, NULL);
2739         }
2740
2741         /*
2742          * If this message has no O (room) field, generate one.
2743          */
2744         if (CM_IsEmpty(msg, eOriginalRoom)) {
2745                 CM_SetField(msg, eOriginalRoom, CCC->room.QRname, strlen(CCC->room.QRname));
2746         }
2747
2748         /* Perform "before save" hooks (aborting if any return nonzero) */
2749         MSGM_syslog(LOG_DEBUG, "Performing before-save hooks\n");
2750         if (PerformMessageHooks(msg, recps, EVT_BEFORESAVE) > 0) return(-3);
2751
2752         /*
2753          * If this message has an Exclusive ID, and the room is replication
2754          * checking enabled, then do replication checks.
2755          */
2756         if (DoesThisRoomNeedEuidIndexing(&CCC->room)) {
2757                 ReplicationChecks(msg);
2758         }
2759
2760         /* Save it to disk */
2761         MSGM_syslog(LOG_DEBUG, "Saving to disk\n");
2762         newmsgid = send_message(msg);
2763         if (newmsgid <= 0L) return(-5);
2764
2765         /* Write a supplemental message info record.  This doesn't have to
2766          * be a critical section because nobody else knows about this message
2767          * yet.
2768          */
2769         MSGM_syslog(LOG_DEBUG, "Creating MetaData record\n");
2770         memset(&smi, 0, sizeof(struct MetaData));
2771         smi.meta_msgnum = newmsgid;
2772         smi.meta_refcount = 0;
2773         safestrncpy(smi.meta_content_type, content_type,
2774                     sizeof smi.meta_content_type);
2775
2776         /*
2777          * Measure how big this message will be when rendered as RFC822.
2778          * We do this for two reasons:
2779          * 1. We need the RFC822 length for the new metadata record, so the
2780          *    POP and IMAP services don't have to calculate message lengths
2781          *    while the user is waiting (multiplied by potentially hundreds
2782          *    or thousands of messages).
2783          * 2. If journaling is enabled, we will need an RFC822 version of the
2784          *    message to attach to the journalized copy.
2785          */
2786         if (CCC->redirect_buffer != NULL) {
2787                 MSGM_syslog(LOG_ALERT, "CCC->redirect_buffer is not NULL during message submission!\n");
2788                 abort();
2789         }
2790         CCC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
2791         CtdlOutputPreLoadedMsg(msg, MT_RFC822, HEADERS_ALL, 0, 1, QP_EADDR);
2792         smi.meta_rfc822_length = StrLength(CCC->redirect_buffer);
2793         saved_rfc822_version = CCC->redirect_buffer;
2794         CCC->redirect_buffer = NULL;
2795
2796         PutMetaData(&smi);
2797
2798         /* Now figure out where to store the pointers */
2799         MSGM_syslog(LOG_DEBUG, "Storing pointers\n");
2800
2801         /* If this is being done by the networker delivering a private
2802          * message, we want to BYPASS saving the sender's copy (because there
2803          * is no local sender; it would otherwise go to the Trashcan).
2804          */
2805         if ((!CCC->internal_pgm) || (recps == NULL)) {
2806                 if (CtdlSaveMsgPointerInRoom(actual_rm, newmsgid, 1, msg) != 0) {
2807                         MSGM_syslog(LOG_ERR, "ERROR saving message pointer!\n");
2808                         CtdlSaveMsgPointerInRoom(config.c_aideroom, newmsgid, 0, msg);
2809                 }
2810         }
2811
2812         /* For internet mail, drop a copy in the outbound queue room */
2813         if ((recps != NULL) && (recps->num_internet > 0)) {
2814                 CtdlSaveMsgPointerInRoom(SMTP_SPOOLOUT_ROOM, newmsgid, 0, msg);
2815         }
2816
2817         /* If other rooms are specified, drop them there too. */
2818         if ((recps != NULL) && (recps->num_room > 0))
2819                 for (i=0; i<num_tokens(recps->recp_room, '|'); ++i) {
2820                         extract_token(recipient, recps->recp_room, i,
2821                                       '|', sizeof recipient);
2822                         MSG_syslog(LOG_DEBUG, "Delivering to room <%s>\n", recipient);///// xxxx
2823                         CtdlSaveMsgPointerInRoom(recipient, newmsgid, 0, msg);
2824                 }
2825
2826         /* Bump this user's messages posted counter. */
2827         MSGM_syslog(LOG_DEBUG, "Updating user\n");
2828         CtdlGetUserLock(&CCC->user, CCC->curr_user);
2829         CCC->user.posted = CCC->user.posted + 1;
2830         CtdlPutUserLock(&CCC->user);
2831
2832         /* Decide where bounces need to be delivered */
2833         if ((recps != NULL) && (recps->bounce_to == NULL))
2834         {
2835                 if (CCC->logged_in)
2836                         snprintf(bounce_to, sizeof bounce_to, "%s@%s",
2837                                  CCC->user.fullname, config.c_nodename);
2838                 else
2839                         snprintf(bounce_to, sizeof bounce_to, "%s@%s",
2840                                  msg->cm_fields[eAuthor], msg->cm_fields[eNodeName]);
2841                 recps->bounce_to = bounce_to;
2842         }
2843
2844         CM_SetFieldLONG(msg, eVltMsgNum, newmsgid);
2845
2846
2847         /* If this is private, local mail, make a copy in the
2848          * recipient's mailbox and bump the reference count.
2849          */
2850         if ((recps != NULL) && (recps->num_local > 0))
2851         {
2852                 char *pch;
2853                 int ntokens;
2854
2855                 pch = recps->recp_local;
2856                 recps->recp_local = recipient;
2857                 ntokens = num_tokens(pch, '|');
2858                 for (i=0; i<ntokens; ++i)
2859                 {
2860                         extract_token(recipient, pch, i, '|', sizeof recipient);
2861                         MSG_syslog(LOG_DEBUG, "Delivering private local mail to <%s>\n", recipient);
2862                         if (CtdlGetUser(&userbuf, recipient) == 0) {
2863                                 CtdlMailboxName(actual_rm, sizeof actual_rm, &userbuf, MAILROOM);
2864                                 CtdlSaveMsgPointerInRoom(actual_rm, newmsgid, 0, msg);
2865                                 CtdlBumpNewMailCounter(userbuf.usernum);
2866                                 PerformMessageHooks(msg, recps, EVT_AFTERUSRMBOXSAVE);
2867                         }
2868                         else {
2869                                 MSG_syslog(LOG_DEBUG, "No user <%s>\n", recipient);
2870                                 CtdlSaveMsgPointerInRoom(config.c_aideroom, newmsgid, 0, msg);
2871                         }
2872                 }
2873                 recps->recp_local = pch;
2874         }
2875
2876         /* Perform "after save" hooks */
2877         MSGM_syslog(LOG_DEBUG, "Performing after-save hooks\n");
2878
2879         PerformMessageHooks(msg, recps, EVT_AFTERSAVE);
2880         CM_FlushField(msg, eVltMsgNum);
2881
2882         /* Go back to the room we started from */
2883         MSG_syslog(LOG_DEBUG, "Returning to original room %s\n", hold_rm);
2884         if (strcasecmp(hold_rm, CCC->room.QRname))
2885                 CtdlUserGoto(hold_rm, 0, 1, NULL, NULL);
2886
2887         /*
2888          * Any addresses to harvest for someone's address book?
2889          */
2890         if ( (CCC->logged_in) && (recps != NULL) ) {
2891                 collected_addresses = harvest_collected_addresses(msg);
2892         }
2893
2894         if (collected_addresses != NULL) {
2895                 aptr = (struct addresses_to_be_filed *)
2896                         malloc(sizeof(struct addresses_to_be_filed));
2897                 CtdlMailboxName(actual_rm, sizeof actual_rm,
2898                                 &CCC->user, USERCONTACTSROOM);
2899                 aptr->roomname = strdup(actual_rm);
2900                 aptr->collected_addresses = collected_addresses;
2901                 begin_critical_section(S_ATBF);
2902                 aptr->next = atbf;
2903                 atbf = aptr;
2904                 end_critical_section(S_ATBF);
2905         }
2906
2907         /*
2908          * Determine whether this message qualifies for journaling.
2909          */
2910         if (!CM_IsEmpty(msg, eJournal)) {
2911                 qualified_for_journaling = 0;
2912         }
2913         else {
2914                 if (recps == NULL) {
2915                         qualified_for_journaling = config.c_journal_pubmsgs;
2916                 }
2917                 else if (recps->num_local + recps->num_ignet + recps->num_internet > 0) {
2918                         qualified_for_journaling = config.c_journal_email;
2919                 }
2920                 else {
2921                         qualified_for_journaling = config.c_journal_pubmsgs;
2922                 }
2923         }
2924
2925         /*
2926          * Do we have to perform journaling?  If so, hand off the saved
2927          * RFC822 version will be handed off to the journaler for background
2928          * submit.  Otherwise, we have to free the memory ourselves.
2929          */
2930         if (saved_rfc822_version != NULL) {
2931                 if (qualified_for_journaling) {
2932                         JournalBackgroundSubmit(msg, saved_rfc822_version, recps);
2933                 }
2934                 else {
2935                         FreeStrBuf(&saved_rfc822_version);
2936                 }
2937         }
2938
2939         if ((recps != NULL) && (recps->bounce_to == bounce_to))
2940                 recps->bounce_to = NULL;
2941
2942         /* Done. */
2943         return(newmsgid);
2944 }
2945
2946
2947 /*
2948  * Convenience function for generating small administrative messages.
2949  */
2950 void quickie_message(const char *from,
2951                      const char *fromaddr,
2952                      const char *to,
2953                      char *room,
2954                      const char *text,
2955                      int format_type,
2956                      const char *subject)
2957 {
2958         struct CtdlMessage *msg;
2959         recptypes *recp = NULL;
2960
2961         msg = malloc(sizeof(struct CtdlMessage));
2962         memset(msg, 0, sizeof(struct CtdlMessage));
2963         msg->cm_magic = CTDLMESSAGE_MAGIC;
2964         msg->cm_anon_type = MES_NORMAL;
2965         msg->cm_format_type = format_type;
2966
2967         if (from != NULL) {
2968                 msg->cm_fields[eAuthor] = strdup(from);
2969         }
2970         else if (fromaddr != NULL) {
2971                 msg->cm_fields[eAuthor] = strdup(fromaddr);
2972                 if (strchr(msg->cm_fields[eAuthor], '@')) {
2973                         *strchr(msg->cm_fields[eAuthor], '@') = 0;
2974                 }
2975         }
2976         else {
2977                 msg->cm_fields[eAuthor] = strdup("Citadel");
2978         }
2979
2980         if (fromaddr != NULL) msg->cm_fields[erFc822Addr] = strdup(fromaddr);
2981         if (room != NULL) msg->cm_fields[eOriginalRoom] = strdup(room);
2982         msg->cm_fields[eNodeName] = strdup(NODENAME);
2983         if (to != NULL) {
2984                 msg->cm_fields[eRecipient] = strdup(to);
2985                 recp = validate_recipients(to, NULL, 0);
2986         }
2987         if (subject != NULL) {
2988                 msg->cm_fields[eMsgSubject] = strdup(subject);
2989         }
2990         msg->cm_fields[eMesageText] = strdup(text);
2991
2992         CtdlSubmitMsg(msg, recp, room, 0);
2993         CM_Free(msg);
2994         if (recp != NULL) free_recipients(recp);
2995 }
2996
2997 void flood_protect_quickie_message(const char *from,
2998                                    const char *fromaddr,
2999                                    const char *to,
3000                                    char *room,
3001                                    const char *text,
3002                                    int format_type,
3003                                    const char *subject,
3004                                    int nCriterions,
3005                                    const char **CritStr,
3006                                    long *CritStrLen,
3007                                    long ccid,
3008                                    long ioid,
3009                                    time_t NOW)
3010 {
3011         int i;
3012         u_char rawdigest[MD5_DIGEST_LEN];
3013         struct MD5Context md5context;
3014         StrBuf *guid;
3015         char timestamp[64];
3016         long tslen;
3017         time_t tsday = NOW / (8*60*60); /* just care for a day... */
3018
3019         tslen = snprintf(timestamp, sizeof(timestamp), "%ld", tsday);
3020         MD5Init(&md5context);
3021
3022         for (i = 0; i < nCriterions; i++)
3023                 MD5Update(&md5context,
3024                           (const unsigned char*)CritStr[i], CritStrLen[i]);
3025         MD5Update(&md5context,
3026                   (const unsigned char*)timestamp, tslen);
3027         MD5Final(rawdigest, &md5context);
3028
3029         guid = NewStrBufPlain(NULL,
3030                               MD5_DIGEST_LEN * 2 + 12);
3031         StrBufHexEscAppend(guid, NULL, rawdigest, MD5_DIGEST_LEN);
3032         StrBufAppendBufPlain(guid, HKEY("_fldpt"), 0);
3033         if (StrLength(guid) > 40)
3034                 StrBufCutAt(guid, 40, NULL);
3035
3036         if (CheckIfAlreadySeen("FPAideMessage",
3037                                guid,
3038                                NOW,
3039                                tsday,
3040                                eUpdate,
3041                                ccid,
3042                                ioid)!= 0)
3043         {
3044                 FreeStrBuf(&guid);
3045                 /* yes, we did. flood protection kicks in. */
3046                 syslog(LOG_DEBUG,
3047                        "not sending message again\n");
3048                 return;
3049         }
3050         FreeStrBuf(&guid);
3051         /* no, this message isn't sent recently; go ahead. */
3052         quickie_message(from,
3053                         fromaddr,
3054                         to,
3055                         room,
3056                         text,
3057                         format_type,
3058                         subject);
3059 }
3060
3061
3062 /*
3063  * Back end function used by CtdlMakeMessage() and similar functions
3064  */
3065 StrBuf *CtdlReadMessageBodyBuf(char *terminator,        /* token signalling EOT */
3066                                long tlen,
3067                                size_t maxlen,           /* maximum message length */
3068                                StrBuf *exist,           /* if non-null, append to it;
3069                                                            exist is ALWAYS freed  */
3070                                int crlf,                /* CRLF newlines instead of LF */
3071                                int *sock                /* socket handle or 0 for this session's client socket */
3072         )
3073 {
3074         StrBuf *Message;
3075         StrBuf *LineBuf;
3076         int flushing = 0;
3077         int finished = 0;
3078         int dotdot = 0;
3079
3080         LineBuf = NewStrBufPlain(NULL, SIZ);
3081         if (exist == NULL) {
3082                 Message = NewStrBufPlain(NULL, 4 * SIZ);
3083         }
3084         else {
3085                 Message = NewStrBufDup(exist);
3086         }
3087
3088         /* Do we need to change leading ".." to "." for SMTP escaping? */
3089         if ((tlen == 1) && (*terminator == '.')) {
3090                 dotdot = 1;
3091         }
3092
3093         /* read in the lines of message text one by one */
3094         do {
3095                 if (sock != NULL) {
3096                         if ((CtdlSockGetLine(sock, LineBuf, 5) < 0) ||
3097                             (*sock == -1))
3098                                 finished = 1;
3099                 }
3100                 else {
3101                         if (CtdlClientGetLine(LineBuf) < 0) finished = 1;
3102                 }
3103                 if ((StrLength(LineBuf) == tlen) &&
3104                     (!strcmp(ChrPtr(LineBuf), terminator)))
3105                         finished = 1;
3106
3107                 if ( (!flushing) && (!finished) ) {
3108                         if (crlf) {
3109                                 StrBufAppendBufPlain(LineBuf, HKEY("\r\n"), 0);
3110                         }
3111                         else {
3112                                 StrBufAppendBufPlain(LineBuf, HKEY("\n"), 0);
3113                         }
3114
3115                         /* Unescape SMTP-style input of two dots at the beginning of the line */
3116                         if ((dotdot) &&
3117                             (StrLength(LineBuf) == 2) &&
3118                             (!strcmp(ChrPtr(LineBuf), "..")))
3119                         {
3120                                 StrBufCutLeft(LineBuf, 1);
3121                         }
3122
3123                         StrBufAppendBuf(Message, LineBuf, 0);
3124                 }
3125
3126                 /* if we've hit the max msg length, flush the rest */
3127                 if (StrLength(Message) >= maxlen) flushing = 1;
3128
3129         } while (!finished);
3130         FreeStrBuf(&LineBuf);
3131         return Message;
3132 }
3133
3134 void DeleteAsyncMsg(ReadAsyncMsg **Msg)
3135 {
3136         if (*Msg == NULL)
3137                 return;
3138         FreeStrBuf(&(*Msg)->MsgBuf);
3139
3140         free(*Msg);
3141         *Msg = NULL;
3142 }
3143
3144 ReadAsyncMsg *NewAsyncMsg(const char *terminator,       /* token signalling EOT */
3145                           long tlen,
3146                           size_t maxlen,                /* maximum message length */
3147                           size_t expectlen,             /* if we expect a message, how long should it be? */
3148                           StrBuf *exist,                /* if non-null, append to it;
3149                                                            exist is ALWAYS freed  */
3150                           long eLen,                    /* length of exist */
3151                           int crlf                      /* CRLF newlines instead of LF */
3152         )
3153 {
3154         ReadAsyncMsg *NewMsg;
3155
3156         NewMsg = (ReadAsyncMsg *)malloc(sizeof(ReadAsyncMsg));
3157         memset(NewMsg, 0, sizeof(ReadAsyncMsg));
3158
3159         if (exist == NULL) {
3160                 long len;
3161
3162                 if (expectlen == 0) {
3163                         len = 4 * SIZ;
3164                 }
3165                 else {
3166                         len = expectlen + 10;
3167                 }
3168                 NewMsg->MsgBuf = NewStrBufPlain(NULL, len);
3169         }
3170         else {
3171                 NewMsg->MsgBuf = NewStrBufDup(exist);
3172         }
3173         /* Do we need to change leading ".." to "." for SMTP escaping? */
3174         if ((tlen == 1) && (*terminator == '.')) {
3175                 NewMsg->dodot = 1;
3176         }
3177
3178         NewMsg->terminator = terminator;
3179         NewMsg->tlen = tlen;
3180
3181         NewMsg->maxlen = maxlen;
3182
3183         NewMsg->crlf = crlf;
3184
3185         return NewMsg;
3186 }
3187
3188 /*
3189  * Back end function used by CtdlMakeMessage() and similar functions
3190  */
3191 eReadState CtdlReadMessageBodyAsync(AsyncIO *IO)
3192 {
3193         ReadAsyncMsg *ReadMsg;
3194         int MsgFinished = 0;
3195         eReadState Finished = eMustReadMore;
3196
3197 #ifdef BIGBAD_IODBG
3198         char fn [SIZ];
3199         FILE *fd;
3200         const char *pch = ChrPtr(IO->SendBuf.Buf);
3201         const char *pchh = IO->SendBuf.ReadWritePointer;
3202         long nbytes;
3203
3204         if (pchh == NULL)
3205                 pchh = pch;
3206
3207         nbytes = StrLength(IO->SendBuf.Buf) - (pchh - pch);
3208         snprintf(fn, SIZ, "/tmp/foolog_ev_%s.%d",
3209                  ((CitContext*)(IO->CitContext))->ServiceName,
3210                  IO->SendBuf.fd);
3211
3212         fd = fopen(fn, "a+");
3213 #endif
3214
3215         ReadMsg = IO->ReadMsg;
3216
3217         /* read in the lines of message text one by one */
3218         do {
3219                 Finished = StrBufChunkSipLine(IO->IOBuf, &IO->RecvBuf);
3220
3221                 switch (Finished) {
3222                 case eMustReadMore: /// read new from socket...
3223 #ifdef BIGBAD_IODBG
3224                         if (IO->RecvBuf.ReadWritePointer != NULL) {
3225                                 nbytes = StrLength(IO->RecvBuf.Buf) - (IO->RecvBuf.ReadWritePointer - ChrPtr(IO->RecvBuf.Buf));
3226                                 fprintf(fd, "Read; Line unfinished: %ld Bytes still in buffer [", nbytes);
3227
3228                                 fwrite(IO->RecvBuf.ReadWritePointer, nbytes, 1, fd);
3229
3230                                 fprintf(fd, "]\n");
3231                         } else {
3232                                 fprintf(fd, "BufferEmpty! \n");
3233                         }
3234                         fclose(fd);
3235 #endif
3236                         return Finished;
3237                     break;
3238                 case eBufferNotEmpty: /* shouldn't happen... */
3239                 case eReadSuccess: /// done for now...
3240                     break;
3241                 case eReadFail: /// WHUT?
3242                     ///todo: shut down!
3243                         break;
3244                 }
3245
3246
3247                 if ((StrLength(IO->IOBuf) == ReadMsg->tlen) &&
3248                     (!strcmp(ChrPtr(IO->IOBuf), ReadMsg->terminator))) {
3249                         MsgFinished = 1;
3250 #ifdef BIGBAD_IODBG
3251                         fprintf(fd, "found Terminator; Message Size: %d\n", StrLength(ReadMsg->MsgBuf));
3252 #endif
3253                 }
3254                 else if (!ReadMsg->flushing) {
3255
3256 #ifdef BIGBAD_IODBG
3257                         fprintf(fd, "Read Line: [%d][%s]\n", StrLength(IO->IOBuf), ChrPtr(IO->IOBuf));
3258 #endif
3259
3260                         /* Unescape SMTP-style input of two dots at the beginning of the line */
3261                         if ((ReadMsg->dodot) &&
3262                             (StrLength(IO->IOBuf) == 2) &&  /* TODO: do we just unescape lines with two dots or any line? */
3263                             (!strcmp(ChrPtr(IO->IOBuf), "..")))
3264                         {
3265 #ifdef BIGBAD_IODBG
3266                                 fprintf(fd, "UnEscaped!\n");
3267 #endif
3268                                 StrBufCutLeft(IO->IOBuf, 1);
3269                         }
3270
3271                         if (ReadMsg->crlf) {
3272                                 StrBufAppendBufPlain(IO->IOBuf, HKEY("\r\n"), 0);
3273                         }
3274                         else {
3275                                 StrBufAppendBufPlain(IO->IOBuf, HKEY("\n"), 0);
3276                         }
3277
3278                         StrBufAppendBuf(ReadMsg->MsgBuf, IO->IOBuf, 0);
3279                 }
3280
3281                 /* if we've hit the max msg length, flush the rest */
3282                 if (StrLength(ReadMsg->MsgBuf) >= ReadMsg->maxlen) ReadMsg->flushing = 1;
3283
3284         } while (!MsgFinished);
3285
3286 #ifdef BIGBAD_IODBG
3287         fprintf(fd, "Done with reading; %s.\n, ",
3288                 (MsgFinished)?"Message Finished": "FAILED");
3289         fclose(fd);
3290 #endif
3291         if (MsgFinished)
3292                 return eReadSuccess;
3293         else
3294                 return eAbort;
3295 }
3296
3297
3298 /*
3299  * Back end function used by CtdlMakeMessage() and similar functions
3300  */
3301 char *CtdlReadMessageBody(char *terminator,     /* token signalling EOT */
3302                           long tlen,
3303                           size_t maxlen,                /* maximum message length */
3304                           StrBuf *exist,                /* if non-null, append to it;
3305                                                    exist is ALWAYS freed  */
3306                           int crlf,             /* CRLF newlines instead of LF */
3307                           int *sock             /* socket handle or 0 for this session's client socket */
3308         )
3309 {
3310         StrBuf *Message;
3311
3312         Message = CtdlReadMessageBodyBuf(terminator,
3313                                          tlen,
3314                                          maxlen,
3315                                          exist,
3316                                          crlf,
3317                                          sock);
3318         if (Message == NULL)
3319                 return NULL;
3320         else
3321                 return SmashStrBuf(&Message);
3322 }
3323
3324 struct CtdlMessage *CtdlMakeMessage(
3325         struct ctdluser *author,        /* author's user structure */
3326         char *recipient,                /* NULL if it's not mail */
3327         char *recp_cc,                  /* NULL if it's not mail */
3328         char *room,                     /* room where it's going */
3329         int type,                       /* see MES_ types in header file */
3330         int format_type,                /* variformat, plain text, MIME... */
3331         char *fake_name,                /* who we're masquerading as */
3332         char *my_email,                 /* which of my email addresses to use (empty is ok) */
3333         char *subject,                  /* Subject (optional) */
3334         char *supplied_euid,            /* ...or NULL if this is irrelevant */
3335         char *preformatted_text,        /* ...or NULL to read text from client */
3336         char *references                /* Thread references */
3337 )
3338 {
3339         return CtdlMakeMessageLen(
3340                 author, /* author's user structure */
3341                 recipient,              /* NULL if it's not mail */
3342                 (recipient)?strlen(recipient) : 0,
3343                 recp_cc,                        /* NULL if it's not mail */
3344                 (recp_cc)?strlen(recp_cc): 0,
3345                 room,                   /* room where it's going */
3346                 (room)?strlen(room): 0,
3347                 type,                   /* see MES_ types in header file */
3348                 format_type,            /* variformat, plain text, MIME... */
3349                 fake_name,              /* who we're masquerading as */
3350                 (fake_name)?strlen(fake_name): 0,
3351                 my_email,                       /* which of my email addresses to use (empty is ok) */
3352                 (my_email)?strlen(my_email): 0,
3353                 subject,                        /* Subject (optional) */
3354                 (subject)?strlen(subject): 0,
3355                 supplied_euid,          /* ...or NULL if this is irrelevant */
3356                 (supplied_euid)?strlen(supplied_euid):0,
3357                 preformatted_text,      /* ...or NULL to read text from client */
3358                 (preformatted_text)?strlen(preformatted_text) : 0,
3359                 references,             /* Thread references */
3360                 (references)?strlen(references):0);
3361
3362 }
3363
3364 /*
3365  * Build a binary message to be saved on disk.
3366  * (NOTE: if you supply 'preformatted_text', the buffer you give it
3367  * will become part of the message.  This means you are no longer
3368  * responsible for managing that memory -- it will be freed along with
3369  * the rest of the fields when CM_Free() is called.)
3370  */
3371
3372 struct CtdlMessage *CtdlMakeMessageLen(
3373         struct ctdluser *author,        /* author's user structure */
3374         char *recipient,                /* NULL if it's not mail */
3375         long rcplen,
3376         char *recp_cc,                  /* NULL if it's not mail */
3377         long cclen,
3378         char *room,                     /* room where it's going */
3379         long roomlen,
3380         int type,                       /* see MES_ types in header file */
3381         int format_type,                /* variformat, plain text, MIME... */
3382         char *fake_name,                /* who we're masquerading as */
3383         long fnlen,
3384         char *my_email,                 /* which of my email addresses to use (empty is ok) */
3385         long myelen,
3386         char *subject,                  /* Subject (optional) */
3387         long subjlen,
3388         char *supplied_euid,            /* ...or NULL if this is irrelevant */
3389         long euidlen,
3390         char *preformatted_text,        /* ...or NULL to read text from client */
3391         long textlen,
3392         char *references,               /* Thread references */
3393         long reflen
3394         )
3395 {
3396         struct CitContext *CCC = CC;
3397         /* Don't confuse the poor folks if it's not routed mail. * /
3398            char dest_node[256] = "";*/
3399         long blen;
3400         char buf[1024];
3401         struct CtdlMessage *msg;
3402         StrBuf *FakeAuthor;
3403         StrBuf *FakeEncAuthor = NULL;
3404
3405         msg = malloc(sizeof(struct CtdlMessage));
3406         memset(msg, 0, sizeof(struct CtdlMessage));
3407         msg->cm_magic = CTDLMESSAGE_MAGIC;
3408         msg->cm_anon_type = type;
3409         msg->cm_format_type = format_type;
3410
3411         if (recipient != NULL) rcplen = striplt(recipient);
3412         if (recp_cc != NULL) cclen = striplt(recp_cc);
3413
3414         /* Path or Return-Path */
3415         if (myelen > 0) {
3416                 CM_SetField(msg, eMessagePath, my_email, myelen);
3417         }
3418         else {
3419                 CM_SetField(msg, eMessagePath, author->fullname, strlen(author->fullname));
3420         }
3421         convert_spaces_to_underscores(msg->cm_fields[eMessagePath]);
3422
3423         blen = snprintf(buf, sizeof buf, "%ld", (long)time(NULL));
3424         CM_SetField(msg, eTimestamp, buf, blen);
3425
3426         if (fnlen > 0) {
3427                 FakeAuthor = NewStrBufPlain (fake_name, fnlen);
3428         }
3429         else {
3430                 FakeAuthor = NewStrBufPlain (author->fullname, -1);
3431         }
3432         StrBufRFC2047encode(&FakeEncAuthor, FakeAuthor);
3433         CM_SetAsFieldSB(msg, eAuthor, &FakeEncAuthor);
3434
3435         if (CCC->room.QRflags & QR_MAILBOX) {           /* room */
3436                 CM_SetField(msg, eOriginalRoom, &CCC->room.QRname[11], strlen(&CCC->room.QRname[11]));
3437         }
3438         else {
3439                 CM_SetField(msg, eOriginalRoom, CCC->room.QRname, strlen(CCC->room.QRname));
3440         }
3441
3442         CM_SetField(msg, eNodeName, NODENAME, strlen(NODENAME));
3443         CM_SetField(msg, eHumanNode, HUMANNODE, strlen(HUMANNODE));
3444
3445         if (rcplen > 0) {
3446                 CM_SetField(msg, eRecipient, recipient, rcplen);
3447         }
3448         if (cclen > 0) {
3449                 CM_SetField(msg, eCarbonCopY, recp_cc, cclen);
3450         }
3451
3452         if (myelen > 0) {
3453                 CM_SetField(msg, erFc822Addr, my_email, myelen);
3454         }
3455         else if ( (author == &CCC->user) && (!IsEmptyStr(CCC->cs_inet_email)) ) {
3456                 CM_SetField(msg, erFc822Addr, CCC->cs_inet_email, strlen(CCC->cs_inet_email));
3457         }
3458
3459         if (subject != NULL) {
3460                 long length;
3461                 length = striplt(subject);
3462                 if (length > 0) {
3463                         long i;
3464                         long IsAscii;
3465                         IsAscii = -1;
3466                         i = 0;
3467                         while ((subject[i] != '\0') &&
3468                                (IsAscii = isascii(subject[i]) != 0 ))
3469                                 i++;
3470                         if (IsAscii != 0)
3471                                 CM_SetField(msg, eMsgSubject, subject, subjlen);
3472                         else /* ok, we've got utf8 in the string. */
3473                         {
3474                                 char *rfc2047Subj;
3475                                 rfc2047Subj = rfc2047encode(subject, length);
3476                                 CM_SetAsField(msg, eMsgSubject, &rfc2047Subj, strlen(rfc2047Subj));
3477                         }
3478
3479                 }
3480         }
3481
3482         if (euidlen > 0) {
3483                 CM_SetField(msg, eExclusiveID, supplied_euid, euidlen);
3484         }
3485
3486         if (reflen > 0) {
3487                 CM_SetField(msg, eWeferences, references, reflen);
3488         }
3489
3490         if (preformatted_text != NULL) {
3491                 CM_SetField(msg, eMesageText, preformatted_text, textlen);
3492         }
3493         else {
3494                 preformatted_text = CtdlReadMessageBody(HKEY("000"), config.c_maxmsglen, NULL, 0, 0);
3495                 if (preformatted_text != NULL) {
3496                         CM_SetField(msg, eMesageText, preformatted_text, strlen(preformatted_text));
3497                 }
3498         }
3499
3500         return(msg);
3501 }
3502
3503
3504
3505
3506 /*
3507  * API function to delete messages which match a set of criteria
3508  * (returns the actual number of messages deleted)
3509  */
3510 int CtdlDeleteMessages(char *room_name,         /* which room */
3511                        long *dmsgnums,          /* array of msg numbers to be deleted */
3512                        int num_dmsgnums,        /* number of msgs to be deleted, or 0 for "any" */
3513                        char *content_type       /* or "" for any.  regular expressions expected. */
3514         )
3515 {
3516         struct CitContext *CCC = CC;
3517         struct ctdlroom qrbuf;
3518         struct cdbdata *cdbfr;
3519         long *msglist = NULL;
3520         long *dellist = NULL;
3521         int num_msgs = 0;
3522         int i, j;
3523         int num_deleted = 0;
3524         int delete_this;
3525         struct MetaData smi;
3526         regex_t re;
3527         regmatch_t pm;
3528         int need_to_free_re = 0;
3529
3530         if (content_type) if (!IsEmptyStr(content_type)) {
3531                         regcomp(&re, content_type, 0);
3532                         need_to_free_re = 1;
3533                 }
3534         MSG_syslog(LOG_DEBUG, " CtdlDeleteMessages(%s, %d msgs, %s)\n",
3535                    room_name, num_dmsgnums, content_type);
3536
3537         /* get room record, obtaining a lock... */
3538         if (CtdlGetRoomLock(&qrbuf, room_name) != 0) {
3539                 MSG_syslog(LOG_ERR, " CtdlDeleteMessages(): Room <%s> not found\n",
3540                            room_name);
3541                 if (need_to_free_re) regfree(&re);
3542                 return (0);     /* room not found */
3543         }
3544         cdbfr = cdb_fetch(CDB_MSGLISTS, &qrbuf.QRnumber, sizeof(long));
3545
3546         if (cdbfr != NULL) {
3547                 dellist = malloc(cdbfr->len);
3548                 msglist = (long *) cdbfr->ptr;
3549                 cdbfr->ptr = NULL;      /* CtdlDeleteMessages() now owns this memory */
3550                 num_msgs = cdbfr->len / sizeof(long);
3551                 cdb_free(cdbfr);
3552         }
3553         if (num_msgs > 0) {
3554                 int have_contenttype = (content_type != NULL) && !IsEmptyStr(content_type);
3555                 int have_delmsgs = (num_dmsgnums == 0) || (dmsgnums == NULL);
3556                 int have_more_del = 1;
3557
3558                 num_msgs = sort_msglist(msglist, num_msgs);
3559                 if (num_dmsgnums > 1)
3560                         num_dmsgnums = sort_msglist(dmsgnums, num_dmsgnums);
3561 /*
3562                 {
3563                         StrBuf *dbg = NewStrBuf();
3564                         for (i = 0; i < num_dmsgnums; i++)
3565                                 StrBufAppendPrintf(dbg, ", %ld", dmsgnums[i]);
3566                         MSG_syslog(LOG_DEBUG, " Deleting before: %s", ChrPtr(dbg));
3567                         FreeStrBuf(&dbg);
3568                 }
3569 */
3570                 i = 0; j = 0;
3571                 while ((i < num_msgs) && (have_more_del)) {
3572                         delete_this = 0x00;
3573
3574                         /* Set/clear a bit for each criterion */
3575
3576                         /* 0 messages in the list or a null list means that we are
3577                          * interested in deleting any messages which meet the other criteria.
3578                          */
3579                         if (have_delmsgs) {
3580                                 delete_this |= 0x01;
3581                         }
3582                         else {
3583                                 while ((i < num_msgs) && (msglist[i] < dmsgnums[j])) i++;
3584
3585                                 if (i >= num_msgs)
3586                                         continue;
3587
3588                                 if (msglist[i] == dmsgnums[j]) {
3589                                         delete_this |= 0x01;
3590                                 }
3591                                 j++;
3592                                 have_more_del = (j < num_dmsgnums);
3593                         }
3594
3595                         if (have_contenttype) {
3596                                 GetMetaData(&smi, msglist[i]);
3597                                 if (regexec(&re, smi.meta_content_type, 1, &pm, 0) == 0) {
3598                                         delete_this |= 0x02;
3599                                 }
3600                         } else {
3601                                 delete_this |= 0x02;
3602                         }
3603
3604                         /* Delete message only if all bits are set */
3605                         if (delete_this == 0x03) {
3606                                 dellist[num_deleted++] = msglist[i];
3607                                 msglist[i] = 0L;
3608                         }
3609                         i++;
3610                 }
3611 /*
3612                 {
3613                         StrBuf *dbg = NewStrBuf();
3614                         for (i = 0; i < num_deleted; i++)
3615                                 StrBufAppendPrintf(dbg, ", %ld", dellist[i]);
3616                         MSG_syslog(LOG_DEBUG, " Deleting: %s", ChrPtr(dbg));
3617                         FreeStrBuf(&dbg);
3618                 }
3619 */
3620                 num_msgs = sort_msglist(msglist, num_msgs);
3621                 cdb_store(CDB_MSGLISTS, &qrbuf.QRnumber, (int)sizeof(long),
3622                           msglist, (int)(num_msgs * sizeof(long)));
3623
3624                 if (num_msgs > 0)
3625                         qrbuf.QRhighest = msglist[num_msgs - 1];
3626                 else
3627                         qrbuf.QRhighest = 0;
3628         }
3629         CtdlPutRoomLock(&qrbuf);
3630
3631         /* Go through the messages we pulled out of the index, and decrement
3632          * their reference counts by 1.  If this is the only room the message
3633          * was in, the reference count will reach zero and the message will
3634          * automatically be deleted from the database.  We do this in a
3635          * separate pass because there might be plug-in hooks getting called,
3636          * and we don't want that happening during an S_ROOMS critical
3637          * section.
3638          */
3639         if (num_deleted) {
3640                 for (i=0; i<num_deleted; ++i) {
3641                         PerformDeleteHooks(qrbuf.QRname, dellist[i]);
3642                 }
3643                 AdjRefCountList(dellist, num_deleted, -1);
3644         }
3645         /* Now free the memory we used, and go away. */
3646         if (msglist != NULL) free(msglist);
3647         if (dellist != NULL) free(dellist);
3648         MSG_syslog(LOG_DEBUG, " %d message(s) deleted.\n", num_deleted);
3649         if (need_to_free_re) regfree(&re);
3650         return (num_deleted);
3651 }
3652
3653
3654
3655
3656 /*
3657  * GetMetaData()  -  Get the supplementary record for a message
3658  */
3659 void GetMetaData(struct MetaData *smibuf, long msgnum)
3660 {
3661
3662         struct cdbdata *cdbsmi;
3663         long TheIndex;
3664
3665         memset(smibuf, 0, sizeof(struct MetaData));
3666         smibuf->meta_msgnum = msgnum;
3667         smibuf->meta_refcount = 1;      /* Default reference count is 1 */
3668
3669         /* Use the negative of the message number for its supp record index */
3670         TheIndex = (0L - msgnum);
3671
3672         cdbsmi = cdb_fetch(CDB_MSGMAIN, &TheIndex, sizeof(long));
3673         if (cdbsmi == NULL) {
3674                 return;         /* record not found; go with defaults */
3675         }
3676         memcpy(smibuf, cdbsmi->ptr,
3677                ((cdbsmi->len > sizeof(struct MetaData)) ?
3678                 sizeof(struct MetaData) : cdbsmi->len));
3679         cdb_free(cdbsmi);
3680         return;
3681 }
3682
3683
3684 /*
3685  * PutMetaData()  -  (re)write supplementary record for a message
3686  */
3687 void PutMetaData(struct MetaData *smibuf)
3688 {
3689         long TheIndex;
3690
3691         /* Use the negative of the message number for the metadata db index */
3692         TheIndex = (0L - smibuf->meta_msgnum);
3693
3694         cdb_store(CDB_MSGMAIN,
3695                   &TheIndex, (int)sizeof(long),
3696                   smibuf, (int)sizeof(struct MetaData));
3697
3698 }
3699
3700 /*
3701  * AdjRefCount  -  submit an adjustment to the reference count for a message.
3702  *                 (These are just queued -- we actually process them later.)
3703  */
3704 void AdjRefCount(long msgnum, int incr)
3705 {
3706         struct CitContext *CCC = CC;
3707         struct arcq new_arcq;
3708         int rv = 0;
3709
3710         MSG_syslog(LOG_DEBUG, "AdjRefCount() msg %ld ref count delta %+d\n", msgnum, incr);
3711
3712         begin_critical_section(S_SUPPMSGMAIN);
3713         if (arcfp == NULL) {
3714                 arcfp = fopen(file_arcq, "ab+");
3715                 chown(file_arcq, CTDLUID, (-1));
3716                 chmod(file_arcq, 0600);
3717         }
3718         end_critical_section(S_SUPPMSGMAIN);
3719
3720         /* msgnum < 0 means that we're trying to close the file */
3721         if (msgnum < 0) {
3722                 MSGM_syslog(LOG_DEBUG, "Closing the AdjRefCount queue file\n");
3723                 begin_critical_section(S_SUPPMSGMAIN);
3724                 if (arcfp != NULL) {
3725                         fclose(arcfp);
3726                         arcfp = NULL;
3727                 }
3728                 end_critical_section(S_SUPPMSGMAIN);
3729                 return;
3730         }
3731
3732         /*
3733          * If we can't open the queue, perform the operation synchronously.
3734          */
3735         if (arcfp == NULL) {
3736                 TDAP_AdjRefCount(msgnum, incr);
3737                 return;
3738         }
3739
3740         new_arcq.arcq_msgnum = msgnum;
3741         new_arcq.arcq_delta = incr;
3742         rv = fwrite(&new_arcq, sizeof(struct arcq), 1, arcfp);
3743         if (rv == -1) {
3744                 MSG_syslog(LOG_EMERG, "Couldn't write Refcount Queue File %s: %s\n",
3745                            file_arcq,
3746                            strerror(errno));
3747         }
3748         fflush(arcfp);
3749
3750         return;
3751 }
3752
3753 void AdjRefCountList(long *msgnum, long nmsg, int incr)
3754 {
3755         struct CitContext *CCC = CC;
3756         long i, the_size, offset;
3757         struct arcq *new_arcq;
3758         int rv = 0;
3759
3760         MSG_syslog(LOG_DEBUG, "AdjRefCountList() msg %ld ref count delta %+d\n", nmsg, incr);
3761
3762         begin_critical_section(S_SUPPMSGMAIN);
3763         if (arcfp == NULL) {
3764                 arcfp = fopen(file_arcq, "ab+");
3765                 chown(file_arcq, CTDLUID, (-1));
3766                 chmod(file_arcq, 0600);
3767         }
3768         end_critical_section(S_SUPPMSGMAIN);
3769
3770         /*
3771          * If we can't open the queue, perform the operation synchronously.
3772          */
3773         if (arcfp == NULL) {
3774                 for (i = 0; i < nmsg; i++)
3775                         TDAP_AdjRefCount(msgnum[i], incr);
3776                 return;
3777         }
3778
3779         the_size = sizeof(struct arcq) * nmsg;
3780         new_arcq = malloc(the_size);
3781         for (i = 0; i < nmsg; i++) {
3782                 new_arcq[i].arcq_msgnum = msgnum[i];
3783                 new_arcq[i].arcq_delta = incr;
3784         }
3785         rv = 0;
3786         offset = 0;
3787         while ((rv >= 0) && (offset < the_size))
3788         {
3789                 rv = fwrite(new_arcq + offset, 1, the_size - offset, arcfp);
3790                 if (rv == -1) {
3791                         MSG_syslog(LOG_EMERG, "Couldn't write Refcount Queue File %s: %s\n",
3792                                    file_arcq,
3793                                    strerror(errno));
3794                 }
3795                 else {
3796                         offset += rv;
3797                 }
3798         }
3799         free(new_arcq);
3800         fflush(arcfp);
3801
3802         return;
3803 }
3804
3805
3806 /*
3807  * TDAP_ProcessAdjRefCountQueue()
3808  *
3809  * Process the queue of message count adjustments that was created by calls
3810  * to AdjRefCount() ... by reading the queue and calling TDAP_AdjRefCount()
3811  * for each one.  This should be an "off hours" operation.
3812  */
3813 int TDAP_ProcessAdjRefCountQueue(void)
3814 {
3815         struct CitContext *CCC = CC;
3816         char file_arcq_temp[PATH_MAX];
3817         int r;
3818         FILE *fp;
3819         struct arcq arcq_rec;
3820         int num_records_processed = 0;
3821
3822         snprintf(file_arcq_temp, sizeof file_arcq_temp, "%s.%04x", file_arcq, rand());
3823
3824         begin_critical_section(S_SUPPMSGMAIN);
3825         if (arcfp != NULL) {
3826                 fclose(arcfp);
3827                 arcfp = NULL;
3828         }
3829
3830         r = link(file_arcq, file_arcq_temp);
3831         if (r != 0) {
3832                 MSG_syslog(LOG_CRIT, "%s: %s\n", file_arcq_temp, strerror(errno));
3833                 end_critical_section(S_SUPPMSGMAIN);
3834                 return(num_records_processed);
3835         }
3836
3837         unlink(file_arcq);
3838         end_critical_section(S_SUPPMSGMAIN);
3839
3840         fp = fopen(file_arcq_temp, "rb");
3841         if (fp == NULL) {
3842                 MSG_syslog(LOG_CRIT, "%s: %s\n", file_arcq_temp, strerror(errno));
3843                 return(num_records_processed);
3844         }
3845
3846         while (fread(&arcq_rec, sizeof(struct arcq), 1, fp) == 1) {
3847                 TDAP_AdjRefCount(arcq_rec.arcq_msgnum, arcq_rec.arcq_delta);
3848                 ++num_records_processed;
3849         }
3850
3851         fclose(fp);
3852         r = unlink(file_arcq_temp);
3853         if (r != 0) {
3854                 MSG_syslog(LOG_CRIT, "%s: %s\n", file_arcq_temp, strerror(errno));
3855         }
3856
3857         return(num_records_processed);
3858 }
3859
3860
3861
3862 /*
3863  * TDAP_AdjRefCount  -  adjust the reference count for a message.
3864  *                      This one does it "for real" because it's called by
3865  *                      the autopurger function that processes the queue
3866  *                      created by AdjRefCount().   If a message's reference
3867  *                      count becomes zero, we also delete the message from
3868  *                      disk and de-index it.
3869  */
3870 void TDAP_AdjRefCount(long msgnum, int incr)
3871 {
3872         struct CitContext *CCC = CC;
3873
3874         struct MetaData smi;
3875         long delnum;
3876
3877         /* This is a *tight* critical section; please keep it that way, as
3878          * it may get called while nested in other critical sections.
3879          * Complicating this any further will surely cause deadlock!
3880          */
3881         begin_critical_section(S_SUPPMSGMAIN);
3882         GetMetaData(&smi, msgnum);
3883         smi.meta_refcount += incr;
3884         PutMetaData(&smi);
3885         end_critical_section(S_SUPPMSGMAIN);
3886         MSG_syslog(LOG_DEBUG, "TDAP_AdjRefCount() msg %ld ref count delta %+d, is now %d\n",
3887                    msgnum, incr, smi.meta_refcount
3888                 );
3889
3890         /* If the reference count is now zero, delete the message
3891          * (and its supplementary record as well).
3892          */
3893         if (smi.meta_refcount == 0) {
3894                 MSG_syslog(LOG_DEBUG, "Deleting message <%ld>\n", msgnum);
3895
3896                 /* Call delete hooks with NULL room to show it has gone altogether */
3897                 PerformDeleteHooks(NULL, msgnum);
3898
3899                 /* Remove from message base */
3900                 delnum = msgnum;
3901                 cdb_delete(CDB_MSGMAIN, &delnum, (int)sizeof(long));
3902                 cdb_delete(CDB_BIGMSGS, &delnum, (int)sizeof(long));
3903
3904                 /* Remove metadata record */
3905                 delnum = (0L - msgnum);
3906                 cdb_delete(CDB_MSGMAIN, &delnum, (int)sizeof(long));
3907         }
3908
3909 }
3910
3911 /*
3912  * Write a generic object to this room
3913  *
3914  * Note: this could be much more efficient.  Right now we use two temporary
3915  * files, and still pull the message into memory as with all others.
3916  */
3917 void CtdlWriteObject(char *req_room,                    /* Room to stuff it in */
3918                      char *content_type,                /* MIME type of this object */
3919                      char *raw_message,         /* Data to be written */
3920                      off_t raw_length,          /* Size of raw_message */
3921                      struct ctdluser *is_mailbox,       /* Mailbox room? */
3922                      int is_binary,                     /* Is encoding necessary? */
3923                      int is_unique,                     /* Del others of this type? */
3924                      unsigned int flags         /* Internal save flags */
3925         )
3926 {
3927         struct CitContext *CCC = CC;
3928         struct ctdlroom qrbuf;
3929         char roomname[ROOMNAMELEN];
3930         struct CtdlMessage *msg;
3931         StrBuf *encoded_message = NULL;
3932
3933         if (is_mailbox != NULL) {
3934                 CtdlMailboxName(roomname, sizeof roomname, is_mailbox, req_room);
3935         }
3936         else {
3937                 safestrncpy(roomname, req_room, sizeof(roomname));
3938         }
3939
3940         MSG_syslog(LOG_DEBUG, "Raw length is %ld\n", (long)raw_length);
3941
3942         if (is_binary) {
3943                 encoded_message = NewStrBufPlain(NULL, (size_t) (((raw_length * 134) / 100) + 4096 ) );
3944         }
3945         else {
3946                 encoded_message = NewStrBufPlain(NULL, (size_t)(raw_length + 4096));
3947         }
3948
3949         StrBufAppendBufPlain(encoded_message, HKEY("Content-type: "), 0);
3950         StrBufAppendBufPlain(encoded_message, content_type, -1, 0);
3951         StrBufAppendBufPlain(encoded_message, HKEY("\n"), 0);
3952
3953         if (is_binary) {
3954                 StrBufAppendBufPlain(encoded_message, HKEY("Content-transfer-encoding: base64\n\n"), 0);
3955         }
3956         else {
3957                 StrBufAppendBufPlain(encoded_message, HKEY("Content-transfer-encoding: 7bit\n\n"), 0);
3958         }
3959
3960         if (is_binary) {
3961                 StrBufBase64Append(encoded_message, NULL, raw_message, raw_length, 0);
3962         }
3963         else {
3964                 StrBufAppendBufPlain(encoded_message, raw_message, raw_length, 0);
3965         }
3966
3967         MSGM_syslog(LOG_DEBUG, "Allocating\n");
3968         msg = malloc(sizeof(struct CtdlMessage));
3969         memset(msg, 0, sizeof(struct CtdlMessage));
3970         msg->cm_magic = CTDLMESSAGE_MAGIC;
3971         msg->cm_anon_type = MES_NORMAL;
3972         msg->cm_format_type = 4;
3973         CM_SetField(msg, eAuthor, CCC->user.fullname, strlen(CCC->user.fullname));
3974         CM_SetField(msg, eOriginalRoom, req_room, strlen(req_room));
3975         CM_SetField(msg, eNodeName, config.c_nodename, strlen(config.c_nodename));
3976         CM_SetField(msg, eHumanNode, config.c_humannode, strlen(config.c_humannode));
3977         msg->cm_flags = flags;
3978
3979         CM_SetAsFieldSB(msg, eMesageText, &encoded_message);
3980
3981         /* Create the requested room if we have to. */
3982         if (CtdlGetRoom(&qrbuf, roomname) != 0) {
3983                 CtdlCreateRoom(roomname,
3984                                ( (is_mailbox != NULL) ? 5 : 3 ),
3985                                "", 0, 1, 0, VIEW_BBS);
3986         }
3987         /* If the caller specified this object as unique, delete all
3988          * other objects of this type that are currently in the room.
3989          */
3990         if (is_unique) {
3991                 MSG_syslog(LOG_DEBUG, "Deleted %d other msgs of this type\n",
3992                            CtdlDeleteMessages(roomname, NULL, 0, content_type)
3993                         );
3994         }
3995         /* Now write the data */
3996         CtdlSubmitMsg(msg, NULL, roomname, 0);
3997         CM_Free(msg);
3998 }
3999
4000
4001
4002 /*****************************************************************************/
4003 /*                      MODULE INITIALIZATION STUFF                          */
4004 /*****************************************************************************/
4005 void SetMessageDebugEnabled(const int n)
4006 {
4007         MessageDebugEnabled = n;
4008 }
4009 CTDL_MODULE_INIT(msgbase)
4010 {
4011         if (!threading) {
4012                 CtdlRegisterDebugFlagHook(HKEY("messages"), SetMessageDebugEnabled, &MessageDebugEnabled);
4013         }
4014
4015         /* return our Subversion id for the Log */
4016         return "msgbase";
4017 }