citadel/msgbase.c

   1 /*
   2  * Implements the message store.
   3  *
   4  * Copyright (c) 1987-2017 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 "config.h"
  26 #include "clientsocket.h"
  27 #include "genstamp.h"
  28 #include "room_ops.h"
  29 #include "user_ops.h"
  30
  31 #include "internet_addressing.h"
  32 #include "euidindex.h"
  33 #include "msgbase.h"
  34 #include "journaling.h"
  35
  36 struct addresses_to_be_filed *atbf = NULL;
  37
  38 /* This temp file holds the queue of operations for AdjRefCount() */
  39 static FILE *arcfp = NULL;
  40 void AdjRefCountList(long *msgnum, long nmsg, int incr);
  41
  42 /*
  43  * These are the four-character field headers we use when outputting
  44  * messages in Citadel format (as opposed to RFC822 format).
  45  */
  46 char *msgkeys[91] = {
  47         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  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,
  56         "from", /* A -> eAuthor       */
  57         NULL,   /* B -> eBig_message  */
  58         NULL,   /* C -> eRemoteRoom   */
  59         NULL,   /* D -> eDestination  */
  60         "exti", /* E -> eXclusivID    */
  61         "rfca", /* F -> erFc822Addr   */
  62         NULL,   /* G */
  63         "hnod", /* H -> eHumanNode    */
  64         "msgn", /* I -> emessageId    */
  65         "jrnl", /* J -> eJournal      */
  66         "rep2", /* K -> eReplyTo      */
  67         "list", /* L -> eListID       */
  68         "text", /* M -> eMesageText   */
  69         "node", /* N -> eNodeName     */
  70         "room", /* O -> eOriginalRoom */
  71         "path", /* P -> eMessagePath  */
  72         NULL,   /* Q */
  73         "rcpt", /* R -> eRecipient    */
  74         "spec", /* S -> eSpecialField */
  75         "time", /* T -> eTimestamp    */
  76         "subj", /* U -> eMsgSubject   */
  77         "nvto", /* V -> eenVelopeTo   */
  78         "wefw", /* W -> eWeferences   */
  79         NULL,   /* X */
  80         "cccc", /* Y -> eCarbonCopY   */
  81         NULL   /* Z */
  82
  83 };
  84 HashList *msgKeyLookup = NULL;
  85
  86 int GetFieldFromMnemonic(eMsgField *f, const char* c)
  87 {
  88         void *v = NULL;
  89         if (GetHash(msgKeyLookup, c, 4, &v)) {
  90                 *f = (eMsgField) v;
  91                 return 1;
  92         }
  93         return 0;
  94 }
  95
  96 void FillMsgKeyLookupTable(void)
  97 {
  98         long i;
  99
 100         msgKeyLookup = NewHash (1, FourHash);
 101
 102         for (i=0; i < 91; i++) {
 103                 if (msgkeys[i] != NULL) {
 104                         Put(msgKeyLookup, msgkeys[i], 4, (void*)i, reference_free_handler);
 105                 }
 106         }
 107 }
 108
 109 eMsgField FieldOrder[]  = {
 110 /* Important fields */
 111         emessageId   ,
 112         eMessagePath ,
 113         eTimestamp   ,
 114         eAuthor      ,
 115         erFc822Addr  ,
 116         eOriginalRoom,
 117         eNodeName    ,
 118         eHumanNode   ,
 119         eRecipient   ,
 120         eDestination ,
 121 /* Semi-important fields */
 122         eBig_message ,
 123         eRemoteRoom  ,
 124         eExclusiveID ,
 125         eWeferences  ,
 126         eJournal     ,
 127 /* G is not used yet, may become virus signature*/
 128         eReplyTo     ,
 129         eListID      ,
 130 /* Q is not used yet */
 131         eSpecialField,
 132         eenVelopeTo  ,
 133 /* X is not used yet */
 134 /* Z is not used yet */
 135         eCarbonCopY  ,
 136         eMsgSubject  ,
 137 /* internal only */
 138         eErrorMsg    ,
 139         eSuppressIdx ,
 140         eExtnotify   ,
 141 /* Message text (MUST be last) */
 142         eMesageText
 143 /* Not saved to disk:
 144         eVltMsgNum
 145 */
 146 };
 147
 148 static const long NDiskFields = sizeof(FieldOrder) / sizeof(eMsgField);
 149
 150 int CM_IsEmpty(struct CtdlMessage *Msg, eMsgField which)
 151 {
 152         return !((Msg->cm_fields[which] != NULL) &&
 153                  (Msg->cm_fields[which][0] != '\0'));
 154 }
 155
 156 void CM_SetField(struct CtdlMessage *Msg, eMsgField which, const char *buf, long length)
 157 {
 158         if (Msg->cm_fields[which] != NULL)
 159                 free (Msg->cm_fields[which]);
 160         Msg->cm_fields[which] = malloc(length + 1);
 161         memcpy(Msg->cm_fields[which], buf, length);
 162         Msg->cm_fields[which][length] = '\0';
 163         Msg->cm_lengths[which] = length;
 164 }
 165
 166 void CM_SetFieldLONG(struct CtdlMessage *Msg, eMsgField which, long lvalue)
 167 {
 168         char buf[128];
 169         long len;
 170         len = snprintf(buf, sizeof(buf), "%ld", lvalue);
 171         CM_SetField(Msg, which, buf, len);
 172 }
 173 void CM_CutFieldAt(struct CtdlMessage *Msg, eMsgField WhichToCut, long maxlen)
 174 {
 175         if (Msg->cm_fields[WhichToCut] == NULL)
 176                 return;
 177
 178         if (Msg->cm_lengths[WhichToCut] > maxlen)
 179         {
 180                 Msg->cm_fields[WhichToCut][maxlen] = '\0';
 181                 Msg->cm_lengths[WhichToCut] = maxlen;
 182         }
 183 }
 184
 185 void CM_FlushField(struct CtdlMessage *Msg, eMsgField which)
 186 {
 187         if (Msg->cm_fields[which] != NULL)
 188                 free (Msg->cm_fields[which]);
 189         Msg->cm_fields[which] = NULL;
 190         Msg->cm_lengths[which] = 0;
 191 }
 192 void CM_Flush(struct CtdlMessage *Msg)
 193 {
 194         int i;
 195
 196         if (CM_IsValidMsg(Msg) == 0)
 197                 return;
 198
 199         for (i = 0; i < 256; ++i)
 200         {
 201                 CM_FlushField(Msg, i);
 202         }
 203 }
 204
 205 void CM_CopyField(struct CtdlMessage *Msg, eMsgField WhichToPutTo, eMsgField WhichtToCopy)
 206 {
 207         long len;
 208         if (Msg->cm_fields[WhichToPutTo] != NULL)
 209                 free (Msg->cm_fields[WhichToPutTo]);
 210
 211         if (Msg->cm_fields[WhichtToCopy] != NULL)
 212         {
 213                 len = Msg->cm_lengths[WhichtToCopy];
 214                 Msg->cm_fields[WhichToPutTo] = malloc(len + 1);
 215                 memcpy(Msg->cm_fields[WhichToPutTo], Msg->cm_fields[WhichtToCopy], len);
 216                 Msg->cm_fields[WhichToPutTo][len] = '\0';
 217                 Msg->cm_lengths[WhichToPutTo] = len;
 218         }
 219         else
 220         {
 221                 Msg->cm_fields[WhichToPutTo] = NULL;
 222                 Msg->cm_lengths[WhichToPutTo] = 0;
 223         }
 224 }
 225
 226
 227 void CM_PrependToField(struct CtdlMessage *Msg, eMsgField which, const char *buf, long length)
 228 {
 229         if (Msg->cm_fields[which] != NULL) {
 230                 long oldmsgsize;
 231                 long newmsgsize;
 232                 char *new;
 233
 234                 oldmsgsize = Msg->cm_lengths[which] + 1;
 235                 newmsgsize = length + oldmsgsize;
 236
 237                 new = malloc(newmsgsize);
 238                 memcpy(new, buf, length);
 239                 memcpy(new + length, Msg->cm_fields[which], oldmsgsize);
 240                 free(Msg->cm_fields[which]);
 241                 Msg->cm_fields[which] = new;
 242                 Msg->cm_lengths[which] = newmsgsize - 1;
 243         }
 244         else {
 245                 Msg->cm_fields[which] = malloc(length + 1);
 246                 memcpy(Msg->cm_fields[which], buf, length);
 247                 Msg->cm_fields[which][length] = '\0';
 248                 Msg->cm_lengths[which] = length;
 249         }
 250 }
 251
 252 void CM_SetAsField(struct CtdlMessage *Msg, eMsgField which, char **buf, long length)
 253 {
 254         if (Msg->cm_fields[which] != NULL)
 255                 free (Msg->cm_fields[which]);
 256
 257         Msg->cm_fields[which] = *buf;
 258         *buf = NULL;
 259         Msg->cm_lengths[which] = length;
 260 }
 261
 262 void CM_SetAsFieldSB(struct CtdlMessage *Msg, eMsgField which, StrBuf **buf)
 263 {
 264         if (Msg->cm_fields[which] != NULL)
 265                 free (Msg->cm_fields[which]);
 266
 267         Msg->cm_lengths[which] = StrLength(*buf);
 268         Msg->cm_fields[which] = SmashStrBuf(buf);
 269 }
 270
 271 void CM_GetAsField(struct CtdlMessage *Msg, eMsgField which, char **ret, long *retlen)
 272 {
 273         if (Msg->cm_fields[which] != NULL)
 274         {
 275                 *retlen = Msg->cm_lengths[which];
 276                 *ret = Msg->cm_fields[which];
 277                 Msg->cm_fields[which] = NULL;
 278                 Msg->cm_lengths[which] = 0;
 279         }
 280         else
 281         {
 282                 *ret = NULL;
 283                 *retlen = 0;
 284         }
 285 }
 286
 287 /*
 288  * Returns 1 if the supplied pointer points to a valid Citadel message.
 289  * If the pointer is NULL or the magic number check fails, returns 0.
 290  */
 291 int CM_IsValidMsg(struct CtdlMessage *msg) {
 292         if (msg == NULL)
 293                 return 0;
 294         if ((msg->cm_magic) != CTDLMESSAGE_MAGIC) {
 295                 syslog(LOG_WARNING, "CM_IsValidMsg() -- self-check failed\n");
 296                 return 0;
 297         }
 298         return 1;
 299 }
 300
 301 void CM_FreeContents(struct CtdlMessage *msg)
 302 {
 303         int i;
 304
 305         for (i = 0; i < 256; ++i)
 306                 if (msg->cm_fields[i] != NULL) {
 307                         free(msg->cm_fields[i]);
 308                         msg->cm_lengths[i] = 0;
 309                 }
 310
 311         msg->cm_magic = 0;      /* just in case */
 312 }
 313 /*
 314  * 'Destructor' for struct CtdlMessage
 315  */
 316 void CM_Free(struct CtdlMessage *msg)
 317 {
 318         if (CM_IsValidMsg(msg) == 0)
 319         {
 320                 if (msg != NULL) free (msg);
 321                 return;
 322         }
 323         CM_FreeContents(msg);
 324         free(msg);
 325 }
 326
 327 int CM_DupField(eMsgField i, struct CtdlMessage *OrgMsg, struct CtdlMessage *NewMsg)
 328 {
 329         long len;
 330         len = OrgMsg->cm_lengths[i];
 331         NewMsg->cm_fields[i] = malloc(len + 1);
 332         if (NewMsg->cm_fields[i] == NULL)
 333                 return 0;
 334         memcpy(NewMsg->cm_fields[i], OrgMsg->cm_fields[i], len);
 335         NewMsg->cm_fields[i][len] = '\0';
 336         NewMsg->cm_lengths[i] = len;
 337         return 1;
 338 }
 339
 340 struct CtdlMessage * CM_Duplicate(struct CtdlMessage *OrgMsg)
 341 {
 342         int i;
 343         struct CtdlMessage *NewMsg;
 344
 345         if (CM_IsValidMsg(OrgMsg) == 0)
 346                 return NULL;
 347         NewMsg = (struct CtdlMessage *)malloc(sizeof(struct CtdlMessage));
 348         if (NewMsg == NULL)
 349                 return NULL;
 350
 351         memcpy(NewMsg, OrgMsg, sizeof(struct CtdlMessage));
 352
 353         memset(&NewMsg->cm_fields, 0, sizeof(char*) * 256);
 354
 355         for (i = 0; i < 256; ++i)
 356         {
 357                 if (OrgMsg->cm_fields[i] != NULL)
 358                 {
 359                         if (!CM_DupField(i, OrgMsg, NewMsg))
 360                         {
 361                                 CM_Free(NewMsg);
 362                                 return NULL;
 363                         }
 364                 }
 365         }
 366
 367         return NewMsg;
 368 }
 369
 370
 371
 372
 373
 374 /* Determine if a given message matches the fields in a message template.
 375  * Return 0 for a successful match.
 376  */
 377 int CtdlMsgCmp(struct CtdlMessage *msg, struct CtdlMessage *template) {
 378         int i;
 379
 380         /* If there aren't any fields in the template, all messages will
 381          * match.
 382          */
 383         if (template == NULL) return(0);
 384
 385         /* Null messages are bogus. */
 386         if (msg == NULL) return(1);
 387
 388         for (i='A'; i<='Z'; ++i) {
 389                 if (template->cm_fields[i] != NULL) {
 390                         if (msg->cm_fields[i] == NULL) {
 391                                 /* Considered equal if temmplate is empty string */
 392                                 if (IsEmptyStr(template->cm_fields[i])) continue;
 393                                 return 1;
 394                         }
 395                         if ((template->cm_lengths[i] != msg->cm_lengths[i]) ||
 396                             (strcasecmp(msg->cm_fields[i], template->cm_fields[i])))
 397                                 return 1;
 398                 }
 399         }
 400
 401         /* All compares succeeded: we have a match! */
 402         return 0;
 403 }
 404
 405
 406
 407 /*
 408  * Retrieve the "seen" message list for the current room.
 409  */
 410 void CtdlGetSeen(char *buf, int which_set) {
 411         visit vbuf;
 412
 413         /* Learn about the user and room in question */
 414         CtdlGetRelationship(&vbuf, &CC->user, &CC->room);
 415
 416         if (which_set == ctdlsetseen_seen)
 417                 safestrncpy(buf, vbuf.v_seen, SIZ);
 418         if (which_set == ctdlsetseen_answered)
 419                 safestrncpy(buf, vbuf.v_answered, SIZ);
 420 }
 421
 422
 423
 424 /*
 425  * Manipulate the "seen msgs" string (or other message set strings)
 426  */
 427 void CtdlSetSeen(long *target_msgnums, int num_target_msgnums,
 428                 int target_setting, int which_set,
 429                 struct ctdluser *which_user, struct ctdlroom *which_room) {
 430         struct cdbdata *cdbfr;
 431         int i, k;
 432         int is_seen = 0;
 433         int was_seen = 0;
 434         long lo = (-1L);
 435         long hi = (-1L); /// TODO: we just write here. y?
 436         visit vbuf;
 437         long *msglist;
 438         int num_msgs = 0;
 439         StrBuf *vset;
 440         StrBuf *setstr;
 441         StrBuf *lostr;
 442         StrBuf *histr;
 443         const char *pvset;
 444         char *is_set;   /* actually an array of booleans */
 445
 446         /* Don't bother doing *anything* if we were passed a list of zero messages */
 447         if (num_target_msgnums < 1) {
 448                 return;
 449         }
 450
 451         /* If no room was specified, we go with the current room. */
 452         if (!which_room) {
 453                 which_room = &CC->room;
 454         }
 455
 456         /* If no user was specified, we go with the current user. */
 457         if (!which_user) {
 458                 which_user = &CC->user;
 459         }
 460
 461         syslog(LOG_DEBUG, "CtdlSetSeen(%d msgs starting with %ld, %s, %d) in <%s>\n",
 462                    num_target_msgnums, target_msgnums[0],
 463                    (target_setting ? "SET" : "CLEAR"),
 464                    which_set,
 465                    which_room->QRname);
 466
 467         /* Learn about the user and room in question */
 468         CtdlGetRelationship(&vbuf, which_user, which_room);
 469
 470         /* Load the message list */
 471         cdbfr = cdb_fetch(CDB_MSGLISTS, &which_room->QRnumber, sizeof(long));
 472         if (cdbfr != NULL) {
 473                 msglist = (long *) cdbfr->ptr;
 474                 cdbfr->ptr = NULL;      /* CtdlSetSeen() now owns this memory */
 475                 num_msgs = cdbfr->len / sizeof(long);
 476                 cdb_free(cdbfr);
 477         } else {
 478                 return; /* No messages at all?  No further action. */
 479         }
 480
 481         is_set = malloc(num_msgs * sizeof(char));
 482         memset(is_set, 0, (num_msgs * sizeof(char)) );
 483
 484         /* Decide which message set we're manipulating */
 485         switch(which_set) {
 486         case ctdlsetseen_seen:
 487                 vset = NewStrBufPlain(vbuf.v_seen, -1);
 488                 break;
 489         case ctdlsetseen_answered:
 490                 vset = NewStrBufPlain(vbuf.v_answered, -1);
 491                 break;
 492         default:
 493                 vset = NewStrBuf();
 494         }
 495
 496
 497 #if 0   /* This is a special diagnostic section.  Do not allow it to run during normal operation. */
 498         syslog(LOG_DEBUG, "There are %d messages in the room.\n", num_msgs);
 499         for (i=0; i<num_msgs; ++i) {
 500                 if ((i > 0) && (msglist[i] <= msglist[i-1])) abort();
 501         }
 502         syslog(LOG_DEBUG, "We are twiddling %d of them.\n", num_target_msgnums);
 503         for (k=0; k<num_target_msgnums; ++k) {
 504                 if ((k > 0) && (target_msgnums[k] <= target_msgnums[k-1])) abort();
 505         }
 506 #endif
 507
 508         syslog(LOG_DEBUG, "before update: %s\n", ChrPtr(vset));
 509
 510         /* Translate the existing sequence set into an array of booleans */
 511         setstr = NewStrBuf();
 512         lostr = NewStrBuf();
 513         histr = NewStrBuf();
 514         pvset = NULL;
 515         while (StrBufExtract_NextToken(setstr, vset, &pvset, ',') >= 0) {
 516
 517                 StrBufExtract_token(lostr, setstr, 0, ':');
 518                 if (StrBufNum_tokens(setstr, ':') >= 2) {
 519                         StrBufExtract_token(histr, setstr, 1, ':');
 520                 }
 521                 else {
 522                         FlushStrBuf(histr);
 523                         StrBufAppendBuf(histr, lostr, 0);
 524                 }
 525                 lo = StrTol(lostr);
 526                 if (!strcmp(ChrPtr(histr), "*")) {
 527                         hi = LONG_MAX;
 528                 }
 529                 else {
 530                         hi = StrTol(histr);
 531                 }
 532
 533                 for (i = 0; i < num_msgs; ++i) {
 534                         if ((msglist[i] >= lo) && (msglist[i] <= hi)) {
 535                                 is_set[i] = 1;
 536                         }
 537                 }
 538         }
 539         FreeStrBuf(&setstr);
 540         FreeStrBuf(&lostr);
 541         FreeStrBuf(&histr);
 542
 543
 544         /* Now translate the array of booleans back into a sequence set */
 545         FlushStrBuf(vset);
 546         was_seen = 0;
 547         lo = (-1);
 548         hi = (-1);
 549
 550         for (i=0; i<num_msgs; ++i) {
 551                 is_seen = is_set[i];
 552
 553                 /* Apply changes */
 554                 for (k=0; k<num_target_msgnums; ++k) {
 555                         if (msglist[i] == target_msgnums[k]) {
 556                                 is_seen = target_setting;
 557                         }
 558                 }
 559
 560                 if ((was_seen == 0) && (is_seen == 1)) {
 561                         lo = msglist[i];
 562                 }
 563                 else if ((was_seen == 1) && (is_seen == 0)) {
 564                         hi = msglist[i-1];
 565
 566                         if (StrLength(vset) > 0) {
 567                                 StrBufAppendBufPlain(vset, HKEY(","), 0);
 568                         }
 569                         if (lo == hi) {
 570                                 StrBufAppendPrintf(vset, "%ld", hi);
 571                         }
 572                         else {
 573                                 StrBufAppendPrintf(vset, "%ld:%ld", lo, hi);
 574                         }
 575                 }
 576
 577                 if ((is_seen) && (i == num_msgs - 1)) {
 578                         if (StrLength(vset) > 0) {
 579                                 StrBufAppendBufPlain(vset, HKEY(","), 0);
 580                         }
 581                         if ((i==0) || (was_seen == 0)) {
 582                                 StrBufAppendPrintf(vset, "%ld", msglist[i]);
 583                         }
 584                         else {
 585                                 StrBufAppendPrintf(vset, "%ld:%ld", lo, msglist[i]);
 586                         }
 587                 }
 588
 589                 was_seen = is_seen;
 590         }
 591
 592         /*
 593          * We will have to stuff this string back into a 4096 byte buffer, so if it's
 594          * larger than that now, truncate it by removing tokens from the beginning.
 595          * The limit of 100 iterations is there to prevent an infinite loop in case
 596          * something unexpected happens.
 597          */
 598         int number_of_truncations = 0;
 599         while ( (StrLength(vset) > SIZ) && (number_of_truncations < 100) ) {
 600                 StrBufRemove_token(vset, 0, ',');
 601                 ++number_of_truncations;
 602         }
 603
 604         /*
 605          * If we're truncating the sequence set of messages marked with the 'seen' flag,
 606          * we want the earliest messages (the truncated ones) to be marked, not unmarked.
 607          * Otherwise messages at the beginning will suddenly appear to be 'unseen'.
 608          */
 609         if ( (which_set == ctdlsetseen_seen) && (number_of_truncations > 0) ) {
 610                 StrBuf *first_tok;
 611                 first_tok = NewStrBuf();
 612                 StrBufExtract_token(first_tok, vset, 0, ',');
 613                 StrBufRemove_token(vset, 0, ',');
 614
 615                 if (StrBufNum_tokens(first_tok, ':') > 1) {
 616                         StrBufRemove_token(first_tok, 0, ':');
 617                 }
 618
 619                 StrBuf *new_set;
 620                 new_set = NewStrBuf();
 621                 StrBufAppendBufPlain(new_set, HKEY("1:"), 0);
 622                 StrBufAppendBuf(new_set, first_tok, 0);
 623                 StrBufAppendBufPlain(new_set, HKEY(":"), 0);
 624                 StrBufAppendBuf(new_set, vset, 0);
 625
 626                 FreeStrBuf(&vset);
 627                 FreeStrBuf(&first_tok);
 628                 vset = new_set;
 629         }
 630
 631         syslog(LOG_DEBUG, " after update: %s\n", ChrPtr(vset));
 632
 633         /* Decide which message set we're manipulating */
 634         switch (which_set) {
 635                 case ctdlsetseen_seen:
 636                         safestrncpy(vbuf.v_seen, ChrPtr(vset), sizeof vbuf.v_seen);
 637                         break;
 638                 case ctdlsetseen_answered:
 639                         safestrncpy(vbuf.v_answered, ChrPtr(vset), sizeof vbuf.v_answered);
 640                         break;
 641         }
 642
 643         free(is_set);
 644         free(msglist);
 645         CtdlSetRelationship(&vbuf, which_user, which_room);
 646         FreeStrBuf(&vset);
 647 }
 648
 649
 650 /*
 651  * API function to perform an operation for each qualifying message in the
 652  * current room.  (Returns the number of messages processed.)
 653  */
 654 int CtdlForEachMessage(int mode, long ref, char *search_string,
 655                         char *content_type,
 656                         struct CtdlMessage *compare,
 657                         ForEachMsgCallback CallBack,
 658                         void *userdata)
 659 {
 660         int a, i, j;
 661         visit vbuf;
 662         struct cdbdata *cdbfr;
 663         long *msglist = NULL;
 664         int num_msgs = 0;
 665         int num_processed = 0;
 666         long thismsg;
 667         struct MetaData smi;
 668         struct CtdlMessage *msg = NULL;
 669         int is_seen = 0;
 670         long lastold = 0L;
 671         int printed_lastold = 0;
 672         int num_search_msgs = 0;
 673         long *search_msgs = NULL;
 674         regex_t re;
 675         int need_to_free_re = 0;
 676         regmatch_t pm;
 677
 678         if ((content_type) && (!IsEmptyStr(content_type))) {
 679                 regcomp(&re, content_type, 0);
 680                 need_to_free_re = 1;
 681         }
 682
 683         /* Learn about the user and room in question */
 684         if (server_shutting_down) {
 685                 if (need_to_free_re) regfree(&re);
 686                 return -1;
 687         }
 688         CtdlGetUser(&CC->user, CC->curr_user);
 689
 690         if (server_shutting_down) {
 691                 if (need_to_free_re) regfree(&re);
 692                 return -1;
 693         }
 694         CtdlGetRelationship(&vbuf, &CC->user, &CC->room);
 695
 696         if (server_shutting_down) {
 697                 if (need_to_free_re) regfree(&re);
 698                 return -1;
 699         }
 700
 701         /* Load the message list */
 702         cdbfr = cdb_fetch(CDB_MSGLISTS, &CC->room.QRnumber, sizeof(long));
 703         if (cdbfr == NULL) {
 704                 if (need_to_free_re) regfree(&re);
 705                 return 0;       /* No messages at all?  No further action. */
 706         }
 707
 708         msglist = (long *) cdbfr->ptr;
 709         num_msgs = cdbfr->len / sizeof(long);
 710
 711         cdbfr->ptr = NULL;      /* clear this so that cdb_free() doesn't free it */
 712         cdb_free(cdbfr);        /* we own this memory now */
 713
 714         /*
 715          * Now begin the traversal.
 716          */
 717         if (num_msgs > 0) for (a = 0; a < num_msgs; ++a) {
 718
 719                 /* If the caller is looking for a specific MIME type, filter
 720                  * out all messages which are not of the type requested.
 721                  */
 722                 if ((content_type != NULL) && (!IsEmptyStr(content_type))) {
 723
 724                         /* This call to GetMetaData() sits inside this loop
 725                          * so that we only do the extra database read per msg
 726                          * if we need to.  Doing the extra read all the time
 727                          * really kills the server.  If we ever need to use
 728                          * metadata for another search criterion, we need to
 729                          * move the read somewhere else -- but still be smart
 730                          * enough to only do the read if the caller has
 731                          * specified something that will need it.
 732                          */
 733                         if (server_shutting_down) {
 734                                 if (need_to_free_re) regfree(&re);
 735                                 free(msglist);
 736                                 return -1;
 737                         }
 738                         GetMetaData(&smi, msglist[a]);
 739
 740                         /* if (strcasecmp(smi.meta_content_type, content_type)) { old non-regex way */
 741                         if (regexec(&re, smi.meta_content_type, 1, &pm, 0) != 0) {
 742                                 msglist[a] = 0L;
 743                         }
 744                 }
 745         }
 746
 747         num_msgs = sort_msglist(msglist, num_msgs);
 748
 749         /* If a template was supplied, filter out the messages which
 750          * don't match.  (This could induce some delays!)
 751          */
 752         if (num_msgs > 0) {
 753                 if (compare != NULL) {
 754                         for (a = 0; a < num_msgs; ++a) {
 755                                 if (server_shutting_down) {
 756                                         if (need_to_free_re) regfree(&re);
 757                                         free(msglist);
 758                                         return -1;
 759                                 }
 760                                 msg = CtdlFetchMessage(msglist[a], 1, 1);
 761                                 if (msg != NULL) {
 762                                         if (CtdlMsgCmp(msg, compare)) {
 763                                                 msglist[a] = 0L;
 764                                         }
 765                                         CM_Free(msg);
 766                                 }
 767                         }
 768                 }
 769         }
 770
 771         /* If a search string was specified, get a message list from
 772          * the full text index and remove messages which aren't on both
 773          * lists.
 774          *
 775          * How this works:
 776          * Since the lists are sorted and strictly ascending, and the
 777          * output list is guaranteed to be shorter than or equal to the
 778          * input list, we overwrite the bottom of the input list.  This
 779          * eliminates the need to memmove big chunks of the list over and
 780          * over again.
 781          */
 782         if ( (num_msgs > 0) && (mode == MSGS_SEARCH) && (search_string) ) {
 783
 784                 /* Call search module via hook mechanism.
 785                  * NULL means use any search function available.
 786                  * otherwise replace with a char * to name of search routine
 787                  */
 788                 CtdlModuleDoSearch(&num_search_msgs, &search_msgs, search_string, "fulltext");
 789
 790                 if (num_search_msgs > 0) {
 791
 792                         int orig_num_msgs;
 793
 794                         orig_num_msgs = num_msgs;
 795                         num_msgs = 0;
 796                         for (i=0; i<orig_num_msgs; ++i) {
 797                                 for (j=0; j<num_search_msgs; ++j) {
 798                                         if (msglist[i] == search_msgs[j]) {
 799                                                 msglist[num_msgs++] = msglist[i];
 800                                         }
 801                                 }
 802                         }
 803                 }
 804                 else {
 805                         num_msgs = 0;   /* No messages qualify */
 806                 }
 807                 if (search_msgs != NULL) free(search_msgs);
 808
 809                 /* Now that we've purged messages which don't contain the search
 810                  * string, treat a MSGS_SEARCH just like a MSGS_ALL from this
 811                  * point on.
 812                  */
 813                 mode = MSGS_ALL;
 814         }
 815
 816         /*
 817          * Now iterate through the message list, according to the
 818          * criteria supplied by the caller.
 819          */
 820         if (num_msgs > 0)
 821                 for (a = 0; a < num_msgs; ++a) {
 822                         if (server_shutting_down) {
 823                                 if (need_to_free_re) regfree(&re);
 824                                 free(msglist);
 825                                 return num_processed;
 826                         }
 827                         thismsg = msglist[a];
 828                         if (mode == MSGS_ALL) {
 829                                 is_seen = 0;
 830                         }
 831                         else {
 832                                 is_seen = is_msg_in_sequence_set(
 833                                                         vbuf.v_seen, thismsg);
 834                                 if (is_seen) lastold = thismsg;
 835                         }
 836                         if ((thismsg > 0L)
 837                             && (
 838
 839                                        (mode == MSGS_ALL)
 840                                        || ((mode == MSGS_OLD) && (is_seen))
 841                                        || ((mode == MSGS_NEW) && (!is_seen))
 842                                        || ((mode == MSGS_LAST) && (a >= (num_msgs - ref)))
 843                                    || ((mode == MSGS_FIRST) && (a < ref))
 844                                 || ((mode == MSGS_GT) && (thismsg > ref))
 845                                 || ((mode == MSGS_LT) && (thismsg < ref))
 846                                 || ((mode == MSGS_EQ) && (thismsg == ref))
 847                             )
 848                             ) {
 849                                 if ((mode == MSGS_NEW) && (CC->user.flags & US_LASTOLD) && (lastold > 0L) && (printed_lastold == 0) && (!is_seen)) {
 850                                         if (CallBack)
 851                                                 CallBack(lastold, userdata);
 852                                         printed_lastold = 1;
 853                                         ++num_processed;
 854                                 }
 855                                 if (CallBack) CallBack(thismsg, userdata);
 856                                 ++num_processed;
 857                         }
 858                 }
 859         if (need_to_free_re) regfree(&re);
 860
 861         /*
 862          * We cache the most recent msglist in order to do security checks later
 863          */
 864         if (CC->client_socket > 0) {
 865                 if (CC->cached_msglist != NULL) {
 866                         free(CC->cached_msglist);
 867                 }
 868                 CC->cached_msglist = msglist;
 869                 CC->cached_num_msgs = num_msgs;
 870         }
 871         else {
 872                 free(msglist);
 873         }
 874
 875         return num_processed;
 876 }
 877
 878
 879
 880 /*
 881  * memfmout()  -  Citadel text formatter and paginator.
 882  *           Although the original purpose of this routine was to format
 883  *           text to the reader's screen width, all we're really using it
 884  *           for here is to format text out to 80 columns before sending it
 885  *           to the client.  The client software may reformat it again.
 886  */
 887 void memfmout(
 888         char *mptr,             /* where are we going to get our text from? */
 889         const char *nl          /* string to terminate lines with */
 890 ) {
 891         int column = 0;
 892         unsigned char ch = 0;
 893         char outbuf[1024];
 894         int len = 0;
 895         int nllen = 0;
 896
 897         if (!mptr) return;
 898         nllen = strlen(nl);
 899         while (ch=*(mptr++), ch != 0) {
 900
 901                 if (ch == '\n') {
 902                         if (client_write(outbuf, len) == -1)
 903                         {
 904                                 syslog(LOG_ERR, "memfmout(): aborting due to write failure.\n");
 905                                 return;
 906                         }
 907                         len = 0;
 908                         if (client_write(nl, nllen) == -1)
 909                         {
 910                                 syslog(LOG_ERR, "memfmout(): aborting due to write failure.\n");
 911                                 return;
 912                         }
 913                         column = 0;
 914                 }
 915                 else if (ch == '\r') {
 916                         /* Ignore carriage returns.  Newlines are always LF or CRLF but never CR. */
 917                 }
 918                 else if (isspace(ch)) {
 919                         if (column > 72) {              /* Beyond 72 columns, break on the next space */
 920                                 if (client_write(outbuf, len) == -1)
 921                                 {
 922                                         syslog(LOG_ERR, "memfmout(): aborting due to write failure.\n");
 923                                         return;
 924                                 }
 925                                 len = 0;
 926                                 if (client_write(nl, nllen) == -1)
 927                                 {
 928                                         syslog(LOG_ERR, "memfmout(): aborting due to write failure.\n");
 929                                         return;
 930                                 }
 931                                 column = 0;
 932                         }
 933                         else {
 934                                 outbuf[len++] = ch;
 935                                 ++column;
 936                         }
 937                 }
 938                 else {
 939                         outbuf[len++] = ch;
 940                         ++column;
 941                         if (column > 1000) {            /* Beyond 1000 columns, break anywhere */
 942                                 if (client_write(outbuf, len) == -1)
 943                                 {
 944                                         syslog(LOG_ERR, "memfmout(): aborting due to write failure.\n");
 945                                         return;
 946                                 }
 947                                 len = 0;
 948                                 if (client_write(nl, nllen) == -1)
 949                                 {
 950                                         syslog(LOG_ERR, "memfmout(): aborting due to write failure.\n");
 951                                         return;
 952                                 }
 953                                 column = 0;
 954                         }
 955                 }
 956         }
 957         if (len) {
 958                 if (client_write(outbuf, len) == -1)
 959                 {
 960                         syslog(LOG_ERR, "memfmout(): aborting due to write failure.\n");
 961                         return;
 962                 }
 963                 client_write(nl, nllen);
 964                 column = 0;
 965         }
 966 }
 967
 968
 969
 970 /*
 971  * Callback function for mime parser that simply lists the part
 972  */
 973 void list_this_part(char *name, char *filename, char *partnum, char *disp,
 974                     void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
 975                     char *cbid, void *cbuserdata)
 976 {
 977         struct ma_info *ma;
 978
 979         ma = (struct ma_info *)cbuserdata;
 980         if (ma->is_ma == 0) {
 981                 cprintf("part=%s|%s|%s|%s|%s|%ld|%s|%s\n",
 982                         name,
 983                         filename,
 984                         partnum,
 985                         disp,
 986                         cbtype,
 987                         (long)length,
 988                         cbid,
 989                         cbcharset);
 990         }
 991 }
 992
 993 /*
 994  * Callback function for multipart prefix
 995  */
 996 void list_this_pref(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 (!strcasecmp(cbtype, "multipart/alternative")) {
1004                 ++ma->is_ma;
1005         }
1006
1007         if (ma->is_ma == 0) {
1008                 cprintf("pref=%s|%s\n", partnum, cbtype);
1009         }
1010 }
1011
1012 /*
1013  * Callback function for multipart sufffix
1014  */
1015 void list_this_suff(char *name, char *filename, char *partnum, char *disp,
1016                     void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
1017                     char *cbid, void *cbuserdata)
1018 {
1019         struct ma_info *ma;
1020
1021         ma = (struct ma_info *)cbuserdata;
1022         if (ma->is_ma == 0) {
1023                 cprintf("suff=%s|%s\n", partnum, cbtype);
1024         }
1025         if (!strcasecmp(cbtype, "multipart/alternative")) {
1026                 --ma->is_ma;
1027         }
1028 }
1029
1030
1031 /*
1032  * Callback function for mime parser that opens a section for downloading
1033  * we use serv_files function here:
1034  */
1035 extern void OpenCmdResult(char *filename, const char *mime_type);
1036 void mime_download(char *name, char *filename, char *partnum, char *disp,
1037                    void *content, char *cbtype, char *cbcharset, size_t length,
1038                    char *encoding, char *cbid, void *cbuserdata)
1039 {
1040         int rv = 0;
1041
1042         /* Silently go away if there's already a download open. */
1043         if (CC->download_fp != NULL)
1044                 return;
1045
1046         if (
1047                 (!IsEmptyStr(partnum) && (!strcasecmp(CC->download_desired_section, partnum)))
1048         ||      (!IsEmptyStr(cbid) && (!strcasecmp(CC->download_desired_section, cbid)))
1049         ) {
1050                 CC->download_fp = tmpfile();
1051                 if (CC->download_fp == NULL) {
1052                         syslog(LOG_EMERG, "mime_download(): Couldn't write: %s\n",
1053                                     strerror(errno));
1054                         cprintf("%d cannot open temporary file: %s\n",
1055                                 ERROR + INTERNAL_ERROR, strerror(errno));
1056                         return;
1057                 }
1058
1059                 rv = fwrite(content, length, 1, CC->download_fp);
1060                 if (rv <= 0) {
1061                         syslog(LOG_EMERG, "mime_download(): Couldn't write: %s\n",
1062                                    strerror(errno));
1063                         cprintf("%d unable to write tempfile.\n",
1064                                 ERROR + TOO_BIG);
1065                         fclose(CC->download_fp);
1066                         CC->download_fp = NULL;
1067                         return;
1068                 }
1069                 fflush(CC->download_fp);
1070                 rewind(CC->download_fp);
1071
1072                 OpenCmdResult(filename, cbtype);
1073         }
1074 }
1075
1076
1077
1078 /*
1079  * Callback function for mime parser that outputs a section all at once.
1080  * We can specify the desired section by part number *or* content-id.
1081  */
1082 void mime_spew_section(char *name, char *filename, char *partnum, char *disp,
1083                    void *content, char *cbtype, char *cbcharset, size_t length,
1084                    char *encoding, char *cbid, void *cbuserdata)
1085 {
1086         int *found_it = (int *)cbuserdata;
1087
1088         if (
1089                 (!IsEmptyStr(partnum) && (!strcasecmp(CC->download_desired_section, partnum)))
1090         ||      (!IsEmptyStr(cbid) && (!strcasecmp(CC->download_desired_section, cbid)))
1091         ) {
1092                 *found_it = 1;
1093                 cprintf("%d %d|-1|%s|%s|%s\n",
1094                         BINARY_FOLLOWS,
1095                         (int)length,
1096                         filename,
1097                         cbtype,
1098                         cbcharset
1099                 );
1100                 client_write(content, length);
1101         }
1102 }
1103
1104 struct CtdlMessage *CtdlDeserializeMessage(long msgnum, int with_body, const char *Buffer, long Length)
1105 {
1106         struct CtdlMessage *ret = NULL;
1107         const char *mptr;
1108         const char *upper_bound;
1109         cit_uint8_t ch;
1110         cit_uint8_t field_header;
1111         eMsgField which;
1112
1113         mptr = Buffer;
1114         upper_bound = Buffer + Length;
1115
1116         /* Parse the three bytes that begin EVERY message on disk.
1117          * The first is always 0xFF, the on-disk magic number.
1118          * The second is the anonymous/public type byte.
1119          * The third is the format type byte (vari, fixed, or MIME).
1120          */
1121         ch = *mptr++;
1122         if (ch != 255) {
1123                 syslog(LOG_ERR, "Message %ld appears to be corrupted.\n", msgnum);
1124                 return NULL;
1125         }
1126         ret = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
1127         memset(ret, 0, sizeof(struct CtdlMessage));
1128
1129         ret->cm_magic = CTDLMESSAGE_MAGIC;
1130         ret->cm_anon_type = *mptr++;    /* Anon type byte */
1131         ret->cm_format_type = *mptr++;  /* Format type byte */
1132
1133         /*
1134          * The rest is zero or more arbitrary fields.  Load them in.
1135          * We're done when we encounter either a zero-length field or
1136          * have just processed the 'M' (message text) field.
1137          */
1138         do {
1139                 field_header = '\0';
1140                 long len;
1141
1142                 /* work around possibly buggy messages: */
1143                 while (field_header == '\0')
1144                 {
1145                         if (mptr >= upper_bound) {
1146                                 break;
1147                         }
1148                         field_header = *mptr++;
1149                 }
1150                 if (mptr >= upper_bound) {
1151                         break;
1152                 }
1153                 which = field_header;
1154                 len = strlen(mptr);
1155
1156                 CM_SetField(ret, which, mptr, len);
1157
1158                 mptr += len + 1;        /* advance to next field */
1159
1160         } while ((mptr < upper_bound) && (field_header != 'M'));
1161
1162         return (ret);
1163 }
1164
1165
1166 /*
1167  * Load a message from disk into memory.
1168  * This is used by CtdlOutputMsg() and other fetch functions.
1169  *
1170  * NOTE: Caller is responsible for freeing the returned CtdlMessage struct
1171  *       using the CM_Free(); function.
1172  */
1173 struct CtdlMessage *CtdlFetchMessage(long msgnum, int with_body, int run_msg_hooks)
1174 {
1175         struct cdbdata *dmsgtext;
1176         struct CtdlMessage *ret = NULL;
1177
1178         syslog(LOG_DEBUG, "CtdlFetchMessage(%ld, %d)\n", msgnum, with_body);
1179         dmsgtext = cdb_fetch(CDB_MSGMAIN, &msgnum, sizeof(long));
1180         if (dmsgtext == NULL) {
1181                 syslog(LOG_ERR, "CtdlFetchMessage(%ld, %d) Failed!\n", msgnum, with_body);
1182                 return NULL;
1183         }
1184
1185         if (dmsgtext->ptr[dmsgtext->len - 1] != '\0')
1186         {
1187                 syslog(LOG_ERR, "CtdlFetchMessage(%ld, %d) Forcefully terminating message!!\n", msgnum, with_body);
1188                 dmsgtext->ptr[dmsgtext->len - 1] = '\0';
1189         }
1190
1191         ret = CtdlDeserializeMessage(msgnum, with_body, dmsgtext->ptr, dmsgtext->len);
1192
1193         cdb_free(dmsgtext);
1194
1195         if (ret == NULL) {
1196                 return NULL;
1197         }
1198
1199         /* Always make sure there's something in the msg text field.  If
1200          * it's NULL, the message text is most likely stored separately,
1201          * so go ahead and fetch that.  Failing that, just set a dummy
1202          * body so other code doesn't barf.
1203          */
1204         if ( (CM_IsEmpty(ret, eMesageText)) && (with_body) ) {
1205                 dmsgtext = cdb_fetch(CDB_BIGMSGS, &msgnum, sizeof(long));
1206                 if (dmsgtext != NULL) {
1207                         CM_SetAsField(ret, eMesageText, &dmsgtext->ptr, dmsgtext->len - 1);
1208                         cdb_free(dmsgtext);
1209                 }
1210         }
1211         if (CM_IsEmpty(ret, eMesageText)) {
1212                 CM_SetField(ret, eMesageText, HKEY("\r\n\r\n (no text)\r\n"));
1213         }
1214
1215         /* Perform "before read" hooks (aborting if any return nonzero) */
1216         if (run_msg_hooks && (PerformMessageHooks(ret, NULL, EVT_BEFOREREAD) > 0)) {
1217                 CM_Free(ret);
1218                 return NULL;
1219         }
1220
1221         return (ret);
1222 }
1223
1224
1225
1226 /*
1227  * Pre callback function for multipart/alternative
1228  *
1229  * NOTE: this differs from the standard behavior for a reason.  Normally when
1230  *       displaying multipart/alternative you want to show the _last_ usable
1231  *       format in the message.  Here we show the _first_ one, because it's
1232  *       usually text/plain.  Since this set of functions is designed for text
1233  *       output to non-MIME-aware clients, this is the desired behavior.
1234  *
1235  */
1236 void fixed_output_pre(char *name, char *filename, char *partnum, char *disp,
1237                 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
1238                 char *cbid, void *cbuserdata)
1239 {
1240         struct ma_info *ma;
1241
1242         ma = (struct ma_info *)cbuserdata;
1243         syslog(LOG_DEBUG, "fixed_output_pre() type=<%s>\n", cbtype);
1244         if (!strcasecmp(cbtype, "multipart/alternative")) {
1245                 ++ma->is_ma;
1246                 ma->did_print = 0;
1247         }
1248         if (!strcasecmp(cbtype, "message/rfc822")) {
1249                 ++ma->freeze;
1250         }
1251 }
1252
1253 /*
1254  * Post callback function for multipart/alternative
1255  */
1256 void fixed_output_post(char *name, char *filename, char *partnum, char *disp,
1257                 void *content, char *cbtype, char *cbcharset, size_t length,
1258                 char *encoding, char *cbid, void *cbuserdata)
1259 {
1260         struct ma_info *ma;
1261
1262         ma = (struct ma_info *)cbuserdata;
1263         syslog(LOG_DEBUG, "fixed_output_post() type=<%s>\n", cbtype);
1264         if (!strcasecmp(cbtype, "multipart/alternative")) {
1265                 --ma->is_ma;
1266                 ma->did_print = 0;
1267         }
1268         if (!strcasecmp(cbtype, "message/rfc822")) {
1269                 --ma->freeze;
1270         }
1271 }
1272
1273 /*
1274  * Inline callback function for mime parser that wants to display text
1275  */
1276 void fixed_output(char *name, char *filename, char *partnum, char *disp,
1277                 void *content, char *cbtype, char *cbcharset, size_t length,
1278                 char *encoding, char *cbid, void *cbuserdata)
1279 {
1280         char *ptr;
1281         char *wptr;
1282         size_t wlen;
1283         struct ma_info *ma;
1284
1285         ma = (struct ma_info *)cbuserdata;
1286
1287         syslog(LOG_DEBUG,
1288                 "fixed_output() part %s: %s (%s) (%ld bytes)\n",
1289                 partnum, filename, cbtype, (long)length);
1290
1291         /*
1292          * If we're in the middle of a multipart/alternative scope and
1293          * we've already printed another section, skip this one.
1294          */
1295         if ( (ma->is_ma) && (ma->did_print) ) {
1296                 syslog(LOG_DEBUG, "Skipping part %s (%s)\n", partnum, cbtype);
1297                 return;
1298         }
1299         ma->did_print = 1;
1300
1301         if ( (!strcasecmp(cbtype, "text/plain"))
1302            || (IsEmptyStr(cbtype)) ) {
1303                 wptr = content;
1304                 if (length > 0) {
1305                         client_write(wptr, length);
1306                         if (wptr[length-1] != '\n') {
1307                                 cprintf("\n");
1308                         }
1309                 }
1310                 return;
1311         }
1312
1313         if (!strcasecmp(cbtype, "text/html")) {
1314                 ptr = html_to_ascii(content, length, 80, 0);
1315                 wlen = strlen(ptr);
1316                 client_write(ptr, wlen);
1317                 if ((wlen > 0) && (ptr[wlen-1] != '\n')) {
1318                         cprintf("\n");
1319                 }
1320                 free(ptr);
1321                 return;
1322         }
1323
1324         if (ma->use_fo_hooks) {
1325                 if (PerformFixedOutputHooks(cbtype, content, length)) {
1326                 /* above function returns nonzero if it handled the part */
1327                         return;
1328                 }
1329         }
1330
1331         if (strncasecmp(cbtype, "multipart/", 10)) {
1332                 cprintf("Part %s: %s (%s) (%ld bytes)\r\n",
1333                         partnum, filename, cbtype, (long)length);
1334                 return;
1335         }
1336 }
1337
1338 /*
1339  * The client is elegant and sophisticated and wants to be choosy about
1340  * MIME content types, so figure out which multipart/alternative part
1341  * we're going to send.
1342  *
1343  * We use a system of weights.  When we find a part that matches one of the
1344  * MIME types we've declared as preferential, we can store it in ma->chosen_part
1345  * and then set ma->chosen_pref to that MIME type's position in our preference
1346  * list.  If we then hit another match, we only replace the first match if
1347  * the preference value is lower.
1348  */
1349 void choose_preferred(char *name, char *filename, char *partnum, char *disp,
1350                 void *content, char *cbtype, char *cbcharset, size_t length,
1351                 char *encoding, char *cbid, void *cbuserdata)
1352 {
1353         char buf[1024];
1354         int i;
1355         struct ma_info *ma;
1356
1357         ma = (struct ma_info *)cbuserdata;
1358
1359         // NOTE: REMOVING THIS CONDITIONAL FIXES BUG 220
1360         //       http://bugzilla.citadel.org/show_bug.cgi?id=220
1361         // I don't know if there are any side effects!  Please TEST TEST TEST
1362         //if (ma->is_ma > 0) {
1363
1364         for (i=0; i<num_tokens(CC->preferred_formats, '|'); ++i) {
1365                 extract_token(buf, CC->preferred_formats, i, '|', sizeof buf);
1366                 if ( (!strcasecmp(buf, cbtype)) && (!ma->freeze) ) {
1367                         if (i < ma->chosen_pref) {
1368                                 syslog(LOG_DEBUG, "Setting chosen part: <%s>\n", partnum);
1369                                 safestrncpy(ma->chosen_part, partnum, sizeof ma->chosen_part);
1370                                 ma->chosen_pref = i;
1371                         }
1372                 }
1373         }
1374 }
1375
1376 /*
1377  * Now that we've chosen our preferred part, output it.
1378  */
1379 void output_preferred(char *name,
1380                       char *filename,
1381                       char *partnum,
1382                       char *disp,
1383                       void *content,
1384                       char *cbtype,
1385                       char *cbcharset,
1386                       size_t length,
1387                       char *encoding,
1388                       char *cbid,
1389                       void *cbuserdata)
1390 {
1391         int i;
1392         char buf[128];
1393         int add_newline = 0;
1394         char *text_content;
1395         struct ma_info *ma;
1396         char *decoded = NULL;
1397         size_t bytes_decoded;
1398         int rc = 0;
1399
1400         ma = (struct ma_info *)cbuserdata;
1401
1402         /* This is not the MIME part you're looking for... */
1403         if (strcasecmp(partnum, ma->chosen_part)) return;
1404
1405         /* If the content-type of this part is in our preferred formats
1406          * list, we can simply output it verbatim.
1407          */
1408         for (i=0; i<num_tokens(CC->preferred_formats, '|'); ++i) {
1409                 extract_token(buf, CC->preferred_formats, i, '|', sizeof buf);
1410                 if (!strcasecmp(buf, cbtype)) {
1411                         /* Yeah!  Go!  W00t!! */
1412                         if (ma->dont_decode == 0)
1413                                 rc = mime_decode_now (content,
1414                                                       length,
1415                                                       encoding,
1416                                                       &decoded,
1417                                                       &bytes_decoded);
1418                         if (rc < 0)
1419                                 break; /* Give us the chance, maybe theres another one. */
1420
1421                         if (rc == 0) text_content = (char *)content;
1422                         else {
1423                                 text_content = decoded;
1424                                 length = bytes_decoded;
1425                         }
1426
1427                         if (text_content[length-1] != '\n') {
1428                                 ++add_newline;
1429                         }
1430                         cprintf("Content-type: %s", cbtype);
1431                         if (!IsEmptyStr(cbcharset)) {
1432                                 cprintf("; charset=%s", cbcharset);
1433                         }
1434                         cprintf("\nContent-length: %d\n",
1435                                 (int)(length + add_newline) );
1436                         if (!IsEmptyStr(encoding)) {
1437                                 cprintf("Content-transfer-encoding: %s\n", encoding);
1438                         }
1439                         else {
1440                                 cprintf("Content-transfer-encoding: 7bit\n");
1441                         }
1442                         cprintf("X-Citadel-MSG4-Partnum: %s\n", partnum);
1443                         cprintf("\n");
1444                         if (client_write(text_content, length) == -1)
1445                         {
1446                                 syslog(LOG_ERR, "output_preferred(): aborting due to write failure.\n");
1447                                 return;
1448                         }
1449                         if (add_newline) cprintf("\n");
1450                         if (decoded != NULL) free(decoded);
1451                         return;
1452                 }
1453         }
1454
1455         /* No translations required or possible: output as text/plain */
1456         cprintf("Content-type: text/plain\n\n");
1457         rc = 0;
1458         if (ma->dont_decode == 0)
1459                 rc = mime_decode_now (content,
1460                                       length,
1461                                       encoding,
1462                                       &decoded,
1463                                       &bytes_decoded);
1464         if (rc < 0)
1465                 return; /* Give us the chance, maybe theres another one. */
1466
1467         if (rc == 0) text_content = (char *)content;
1468         else {
1469                 text_content = decoded;
1470                 length = bytes_decoded;
1471         }
1472
1473         fixed_output(name, filename, partnum, disp, text_content, cbtype, cbcharset,
1474                         length, encoding, cbid, cbuserdata);
1475         if (decoded != NULL) free(decoded);
1476 }
1477
1478
1479 struct encapmsg {
1480         char desired_section[64];
1481         char *msg;
1482         size_t msglen;
1483 };
1484
1485
1486 /*
1487  * Callback function for
1488  */
1489 void extract_encapsulated_message(char *name, char *filename, char *partnum, char *disp,
1490                    void *content, char *cbtype, char *cbcharset, size_t length,
1491                    char *encoding, char *cbid, void *cbuserdata)
1492 {
1493         struct encapmsg *encap;
1494
1495         encap = (struct encapmsg *)cbuserdata;
1496
1497         /* Only proceed if this is the desired section... */
1498         if (!strcasecmp(encap->desired_section, partnum)) {
1499                 encap->msglen = length;
1500                 encap->msg = malloc(length + 2);
1501                 memcpy(encap->msg, content, length);
1502                 return;
1503         }
1504 }
1505
1506
1507 /*
1508  * Determine whether the specified message exists in the cached_msglist
1509  * (This is a security check)
1510  */
1511 int check_cached_msglist(long msgnum) {
1512
1513         /* cases in which we skip the check */
1514         if (!CC) return om_ok;                                          /* not a session */
1515         if (CC->client_socket <= 0) return om_ok;                       /* not a client session */
1516         if (CC->cached_msglist == NULL) return om_access_denied;        /* no msglist fetched */
1517         if (CC->cached_num_msgs == 0) return om_access_denied;          /* nothing to check */
1518
1519
1520         /* Do a binary search within the cached_msglist for the requested msgnum */
1521         int min = 0;
1522         int max = (CC->cached_num_msgs - 1);
1523
1524         while (max >= min) {
1525                 int middle = min + (max-min) / 2 ;
1526                 if (msgnum == CC->cached_msglist[middle]) {
1527                         return om_ok;
1528                 }
1529                 if (msgnum > CC->cached_msglist[middle]) {
1530                         min = middle + 1;
1531                 }
1532                 else {
1533                         max = middle - 1;
1534                 }
1535         }
1536
1537         return om_access_denied;
1538 }
1539
1540
1541
1542 /*
1543  * Get a message off disk.  (returns om_* values found in msgbase.h)
1544  *
1545  */
1546 int CtdlOutputMsg(long msg_num,         /* message number (local) to fetch */
1547                 int mode,               /* how would you like that message? */
1548                 int headers_only,       /* eschew the message body? */
1549                 int do_proto,           /* do Citadel protocol responses? */
1550                 int crlf,               /* Use CRLF newlines instead of LF? */
1551                 char *section,          /* NULL or a message/rfc822 section */
1552                 int flags,              /* various flags; see msgbase.h */
1553                 char **Author,
1554                 char **Address,
1555                 char **MessageID
1556 ) {
1557         struct CtdlMessage *TheMessage = NULL;
1558         int retcode = CIT_OK;
1559         struct encapmsg encap;
1560         int r;
1561
1562         syslog(LOG_DEBUG, "CtdlOutputMsg(msgnum=%ld, mode=%d, section=%s)\n",
1563                 msg_num, mode,
1564                 (section ? section : "<>")
1565         );
1566
1567         r = CtdlDoIHavePermissionToReadMessagesInThisRoom();
1568         if (r != om_ok) {
1569                 if (do_proto) {
1570                         if (r == om_not_logged_in) {
1571                                 cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
1572                         }
1573                         else {
1574                                 cprintf("%d An unknown error has occurred.\n", ERROR);
1575                         }
1576                 }
1577                 return(r);
1578         }
1579
1580         /*
1581          * Check to make sure the message is actually IN this room
1582          */
1583         r = check_cached_msglist(msg_num);
1584         if (r == om_access_denied) {
1585                 /* Not in the cache?  We get ONE shot to check it again. */
1586                 CtdlForEachMessage(MSGS_ALL, 0L, NULL, NULL, NULL, NULL, NULL);
1587                 r = check_cached_msglist(msg_num);
1588         }
1589         if (r != om_ok) {
1590                 syslog(LOG_DEBUG, "Security check fail: message %ld is not in %s\n",
1591                            msg_num, CC->room.QRname
1592                 );
1593                 if (do_proto) {
1594                         if (r == om_access_denied) {
1595                                 cprintf("%d message %ld was not found in this room\n",
1596                                         ERROR + HIGHER_ACCESS_REQUIRED,
1597                                         msg_num
1598                                 );
1599                         }
1600                 }
1601                 return(r);
1602         }
1603
1604         /*
1605          * Fetch the message from disk.  If we're in HEADERS_FAST mode,
1606          * request that we don't even bother loading the body into memory.
1607          */
1608         if (headers_only == HEADERS_FAST) {
1609                 TheMessage = CtdlFetchMessage(msg_num, 0, 1);
1610         }
1611         else {
1612                 TheMessage = CtdlFetchMessage(msg_num, 1, 1);
1613         }
1614
1615         if (TheMessage == NULL) {
1616                 if (do_proto) cprintf("%d Can't locate msg %ld on disk\n",
1617                         ERROR + MESSAGE_NOT_FOUND, msg_num);
1618                 return(om_no_such_msg);
1619         }
1620
1621         /* Here is the weird form of this command, to process only an
1622          * encapsulated message/rfc822 section.
1623          */
1624         if (section) if (!IsEmptyStr(section)) if (strcmp(section, "0")) {
1625                 memset(&encap, 0, sizeof encap);
1626                 safestrncpy(encap.desired_section, section, sizeof encap.desired_section);
1627                 mime_parser(CM_RANGE(TheMessage, eMesageText),
1628                             *extract_encapsulated_message,
1629                             NULL, NULL, (void *)&encap, 0
1630                         );
1631
1632                 if ((Author != NULL) && (*Author == NULL))
1633                 {
1634                         long len;
1635                         CM_GetAsField(TheMessage, eAuthor, Author, &len);
1636                 }
1637                 if ((Address != NULL) && (*Address == NULL))
1638                 {
1639                         long len;
1640                         CM_GetAsField(TheMessage, erFc822Addr, Address, &len);
1641                 }
1642                 if ((MessageID != NULL) && (*MessageID == NULL))
1643                 {
1644                         long len;
1645                         CM_GetAsField(TheMessage, emessageId, MessageID, &len);
1646                 }
1647                 CM_Free(TheMessage);
1648                 TheMessage = NULL;
1649
1650                 if (encap.msg) {
1651                         encap.msg[encap.msglen] = 0;
1652                         TheMessage = convert_internet_message(encap.msg);
1653                         encap.msg = NULL;       /* no free() here, TheMessage owns it now */
1654
1655                         /* Now we let it fall through to the bottom of this
1656                          * function, because TheMessage now contains the
1657                          * encapsulated message instead of the top-level
1658                          * message.  Isn't that neat?
1659                          */
1660                 }
1661                 else {
1662                         if (do_proto) {
1663                                 cprintf("%d msg %ld has no part %s\n",
1664                                         ERROR + MESSAGE_NOT_FOUND,
1665                                         msg_num,
1666                                         section);
1667                         }
1668                         retcode = om_no_such_msg;
1669                 }
1670
1671         }
1672
1673         /* Ok, output the message now */
1674         if (retcode == CIT_OK)
1675                 retcode = CtdlOutputPreLoadedMsg(TheMessage, mode, headers_only, do_proto, crlf, flags);
1676         if ((Author != NULL) && (*Author == NULL))
1677         {
1678                 long len;
1679                 CM_GetAsField(TheMessage, eAuthor, Author, &len);
1680         }
1681         if ((Address != NULL) && (*Address == NULL))
1682         {
1683                 long len;
1684                 CM_GetAsField(TheMessage, erFc822Addr, Address, &len);
1685         }
1686         if ((MessageID != NULL) && (*MessageID == NULL))
1687         {
1688                 long len;
1689                 CM_GetAsField(TheMessage, emessageId, MessageID, &len);
1690         }
1691
1692         CM_Free(TheMessage);
1693
1694         return(retcode);
1695 }
1696
1697
1698
1699 void OutputCtdlMsgHeaders(
1700         struct CtdlMessage *TheMessage,
1701         int do_proto)           /* do Citadel protocol responses? */
1702 {
1703         int i;
1704         int suppress_f = 0;
1705         char buf[SIZ];
1706         char display_name[256];
1707
1708         /* begin header processing loop for Citadel message format */
1709         safestrncpy(display_name, "<unknown>", sizeof display_name);
1710         if (!CM_IsEmpty(TheMessage, eAuthor)) {
1711                 strcpy(buf, TheMessage->cm_fields[eAuthor]);
1712                 if (TheMessage->cm_anon_type == MES_ANONONLY) {
1713                         safestrncpy(display_name, "****", sizeof display_name);
1714                 }
1715                 else if (TheMessage->cm_anon_type == MES_ANONOPT) {
1716                         safestrncpy(display_name, "anonymous", sizeof display_name);
1717                 }
1718                 else {
1719                         safestrncpy(display_name, buf, sizeof display_name);
1720                 }
1721                 if ((is_room_aide())
1722                     && ((TheMessage->cm_anon_type == MES_ANONONLY)
1723                         || (TheMessage->cm_anon_type == MES_ANONOPT))) {
1724                         size_t tmp = strlen(display_name);
1725                         snprintf(&display_name[tmp],
1726                                  sizeof display_name - tmp,
1727                                  " [%s]", buf);
1728                 }
1729         }
1730
1731         /* Don't show Internet address for users on the
1732          * local Citadel network.
1733          */
1734         suppress_f = 0;
1735         if (!CM_IsEmpty(TheMessage, eNodeName) &&
1736             (haschar(TheMessage->cm_fields[eNodeName], '.') == 0))
1737         {
1738                 suppress_f = 1;
1739         }
1740
1741         /* Now spew the header fields in the order we like them. */
1742         for (i=0; i< NDiskFields; ++i) {
1743                 eMsgField Field;
1744                 Field = FieldOrder[i];
1745                 if (Field != eMesageText) {
1746                         if ( (!CM_IsEmpty(TheMessage, Field))
1747                              && (msgkeys[Field] != NULL) ) {
1748                                 if ((Field == eenVelopeTo) ||
1749                                     (Field == eRecipient) ||
1750                                     (Field == eCarbonCopY)) {
1751                                         sanitize_truncated_recipient(TheMessage->cm_fields[Field]);
1752                                 }
1753                                 if (Field == eAuthor) {
1754                                         if (do_proto) cprintf("%s=%s\n",
1755                                                               msgkeys[Field],
1756                                                               display_name);
1757                                 }
1758                                 else if ((Field == erFc822Addr) && (suppress_f)) {
1759                                         /* do nothing */
1760                                 }
1761                                 /* Masquerade display name if needed */
1762                                 else {
1763                                         if (do_proto) cprintf("%s=%s\n",
1764                                                               msgkeys[Field],
1765                                                               TheMessage->cm_fields[Field]
1766                                                 );
1767                                 }
1768                         }
1769                 }
1770         }
1771
1772 }
1773
1774 void OutputRFC822MsgHeaders(
1775         struct CtdlMessage *TheMessage,
1776         int flags,              /* should the bessage be exported clean */
1777         const char *nl, int nlen,
1778         char *mid, long sizeof_mid,
1779         char *suser, long sizeof_suser,
1780         char *luser, long sizeof_luser,
1781         char *fuser, long sizeof_fuser,
1782         char *snode, long sizeof_snode)
1783 {
1784         char datestamp[100];
1785         int subject_found = 0;
1786         char buf[SIZ];
1787         int i, j, k;
1788         char *mptr = NULL;
1789         char *mpptr = NULL;
1790         char *hptr;
1791
1792         for (i = 0; i < NDiskFields; ++i) {
1793                 if (TheMessage->cm_fields[FieldOrder[i]]) {
1794                         mptr = mpptr = TheMessage->cm_fields[FieldOrder[i]];
1795                         switch (FieldOrder[i]) {
1796                         case eAuthor:
1797                                 safestrncpy(luser, mptr, sizeof_luser);
1798                                 safestrncpy(suser, mptr, sizeof_suser);
1799                                 break;
1800                         case eCarbonCopY:
1801                                 if ((flags & QP_EADDR) != 0) {
1802                                         mptr = qp_encode_email_addrs(mptr);
1803                                 }
1804                                 sanitize_truncated_recipient(mptr);
1805                                 cprintf("CC: %s%s", mptr, nl);
1806                                 break;
1807                         case eMessagePath:
1808                                 cprintf("Return-Path: %s%s", mptr, nl);
1809                                 break;
1810                         case eListID:
1811                                 cprintf("List-ID: %s%s", mptr, nl);
1812                                 break;
1813                         case eenVelopeTo:
1814                                 if ((flags & QP_EADDR) != 0)
1815                                         mptr = qp_encode_email_addrs(mptr);
1816                                 hptr = mptr;
1817                                 while ((*hptr != '\0') && isspace(*hptr))
1818                                         hptr ++;
1819                                 if (!IsEmptyStr(hptr))
1820                                         cprintf("Envelope-To: %s%s", hptr, nl);
1821                                 break;
1822                         case eMsgSubject:
1823                                 cprintf("Subject: %s%s", mptr, nl);
1824                                 subject_found = 1;
1825                                 break;
1826                         case emessageId:
1827                                 safestrncpy(mid, mptr, sizeof_mid); /// TODO: detect @ here and copy @nodename in if not found.
1828                                 break;
1829                         case erFc822Addr:
1830                                 safestrncpy(fuser, mptr, sizeof_fuser);
1831                         /* case eOriginalRoom:
1832                            cprintf("X-Citadel-Room: %s%s",
1833                            mptr, nl)
1834                            break;
1835                            ; */
1836                         case eNodeName:
1837                                 safestrncpy(snode, mptr, sizeof_snode);
1838                                 break;
1839                         case eRecipient:
1840                                 if (haschar(mptr, '@') == 0)
1841                                 {
1842                                         sanitize_truncated_recipient(mptr);
1843                                         cprintf("To: %s@%s", mptr, CtdlGetConfigStr("c_fqdn"));
1844                                         cprintf("%s", nl);
1845                                 }
1846                                 else
1847                                 {
1848                                         if ((flags & QP_EADDR) != 0) {
1849                                                 mptr = qp_encode_email_addrs(mptr);
1850                                         }
1851                                         sanitize_truncated_recipient(mptr);
1852                                         cprintf("To: %s", mptr);
1853                                         cprintf("%s", nl);
1854                                 }
1855                                 break;
1856                         case eTimestamp:
1857                                 datestring(datestamp, sizeof datestamp,
1858                                            atol(mptr), DATESTRING_RFC822);
1859                                 cprintf("Date: %s%s", datestamp, nl);
1860                                 break;
1861                         case eWeferences:
1862                                 cprintf("References: ");
1863                                 k = num_tokens(mptr, '|');
1864                                 for (j=0; j<k; ++j) {
1865                                         extract_token(buf, mptr, j, '|', sizeof buf);
1866                                         cprintf("<%s>", buf);
1867                                         if (j == (k-1)) {
1868                                                 cprintf("%s", nl);
1869                                         }
1870                                         else {
1871                                                 cprintf(" ");
1872                                         }
1873                                 }
1874                                 break;
1875                         case eReplyTo:
1876                                 hptr = mptr;
1877                                 while ((*hptr != '\0') && isspace(*hptr))
1878                                         hptr ++;
1879                                 if (!IsEmptyStr(hptr))
1880                                         cprintf("Reply-To: %s%s", mptr, nl);
1881                                 break;
1882
1883                         case eRemoteRoom:
1884                         case eDestination:
1885                         case eExclusiveID:
1886                         case eHumanNode:
1887                         case eJournal:
1888                         case eMesageText:
1889                         case eBig_message:
1890                         case eOriginalRoom:
1891                         case eSpecialField:
1892                         case eErrorMsg:
1893                         case eSuppressIdx:
1894                         case eExtnotify:
1895                         case eVltMsgNum:
1896                                 /* these don't map to mime message headers. */
1897                                 break;
1898
1899                         }
1900                         if (mptr != mpptr)
1901                                 free (mptr);
1902                 }
1903         }
1904         if (subject_found == 0) {
1905                 cprintf("Subject: (no subject)%s", nl);
1906         }
1907 }
1908
1909
1910 void Dump_RFC822HeadersBody(
1911         struct CtdlMessage *TheMessage,
1912         int headers_only,       /* eschew the message body? */
1913         int flags,              /* should the bessage be exported clean? */
1914
1915         const char *nl, int nlen)
1916 {
1917         cit_uint8_t prev_ch;
1918         int eoh = 0;
1919         const char *StartOfText = StrBufNOTNULL;
1920         char outbuf[1024];
1921         int outlen = 0;
1922         int nllen = strlen(nl);
1923         char *mptr;
1924         int lfSent = 0;
1925
1926         mptr = TheMessage->cm_fields[eMesageText];
1927
1928
1929         prev_ch = '\0';
1930         while (*mptr != '\0') {
1931                 if (*mptr == '\r') {
1932                         /* do nothing */
1933                 }
1934                 else {
1935                         if ((!eoh) &&
1936                             (*mptr == '\n'))
1937                         {
1938                                 eoh = (*(mptr+1) == '\r') && (*(mptr+2) == '\n');
1939                                 if (!eoh)
1940                                         eoh = *(mptr+1) == '\n';
1941                                 if (eoh)
1942                                 {
1943                                         StartOfText = mptr;
1944                                         StartOfText = strchr(StartOfText, '\n');
1945                                         StartOfText = strchr(StartOfText, '\n');
1946                                 }
1947                         }
1948                         if (((headers_only == HEADERS_NONE) && (mptr >= StartOfText)) ||
1949                             ((headers_only == HEADERS_ONLY) && (mptr < StartOfText)) ||
1950                             ((headers_only != HEADERS_NONE) &&
1951                              (headers_only != HEADERS_ONLY))
1952                                 ) {
1953                                 if (*mptr == '\n') {
1954                                         memcpy(&outbuf[outlen], nl, nllen);
1955                                         outlen += nllen;
1956                                         outbuf[outlen] = '\0';
1957                                 }
1958                                 else {
1959                                         outbuf[outlen++] = *mptr;
1960                                 }
1961                         }
1962                 }
1963                 if (flags & ESC_DOT)
1964                 {
1965                         if ((prev_ch == '\n') &&
1966                             (*mptr == '.') &&
1967                             ((*(mptr+1) == '\r') || (*(mptr+1) == '\n')))
1968                         {
1969                                 outbuf[outlen++] = '.';
1970                         }
1971                         prev_ch = *mptr;
1972                 }
1973                 ++mptr;
1974                 if (outlen > 1000) {
1975                         if (client_write(outbuf, outlen) == -1)
1976                         {
1977                                 syslog(LOG_ERR, "Dump_RFC822HeadersBody(): aborting due to write failure.\n");
1978                                 return;
1979                         }
1980                         lfSent =  (outbuf[outlen - 1] == '\n');
1981                         outlen = 0;
1982                 }
1983         }
1984         if (outlen > 0) {
1985                 client_write(outbuf, outlen);
1986                 lfSent =  (outbuf[outlen - 1] == '\n');
1987         }
1988         if (!lfSent)
1989                 client_write(nl, nlen);
1990 }
1991
1992
1993
1994 /* If the format type on disk is 1 (fixed-format), then we want
1995  * everything to be output completely literally ... regardless of
1996  * what message transfer format is in use.
1997  */
1998 void DumpFormatFixed(
1999         struct CtdlMessage *TheMessage,
2000         int mode,               /* how would you like that message? */
2001         const char *nl, int nllen)
2002 {
2003         cit_uint8_t ch;
2004         char buf[SIZ];
2005         int buflen;
2006         int xlline = 0;
2007         char *mptr;
2008
2009         mptr = TheMessage->cm_fields[eMesageText];
2010
2011         if (mode == MT_MIME) {
2012                 cprintf("Content-type: text/plain\n\n");
2013         }
2014         *buf = '\0';
2015         buflen = 0;
2016         while (ch = *mptr++, ch > 0) {
2017                 if (ch == '\n')
2018                         ch = '\r';
2019
2020                 if ((buflen > 250) && (!xlline)){
2021                         int tbuflen;
2022                         tbuflen = buflen;
2023
2024                         while ((buflen > 0) &&
2025                                (!isspace(buf[buflen])))
2026                                 buflen --;
2027                         if (buflen == 0) {
2028                                 xlline = 1;
2029                         }
2030                         else {
2031                                 mptr -= tbuflen - buflen;
2032                                 buf[buflen] = '\0';
2033                                 ch = '\r';
2034                         }
2035                 }
2036                 /* if we reach the outer bounds of our buffer,
2037                    abort without respect what whe purge. */
2038                 if (xlline &&
2039                     ((isspace(ch)) ||
2040                      (buflen > SIZ - nllen - 2)))
2041                         ch = '\r';
2042
2043                 if (ch == '\r') {
2044                         memcpy (&buf[buflen], nl, nllen);
2045                         buflen += nllen;
2046                         buf[buflen] = '\0';
2047
2048                         if (client_write(buf, buflen) == -1)
2049                         {
2050                                 syslog(LOG_ERR, "DumpFormatFixed(): aborting due to write failure.\n");
2051                                 return;
2052                         }
2053                         *buf = '\0';
2054                         buflen = 0;
2055                         xlline = 0;
2056                 } else {
2057                         buf[buflen] = ch;
2058                         buflen++;
2059                 }
2060         }
2061         buf[buflen] = '\0';
2062         if (!IsEmptyStr(buf))
2063                 cprintf("%s%s", buf, nl);
2064 }
2065
2066 /*
2067  * Get a message off disk.  (returns om_* values found in msgbase.h)
2068  */
2069 int CtdlOutputPreLoadedMsg(
2070                 struct CtdlMessage *TheMessage,
2071                 int mode,               /* how would you like that message? */
2072                 int headers_only,       /* eschew the message body? */
2073                 int do_proto,           /* do Citadel protocol responses? */
2074                 int crlf,               /* Use CRLF newlines instead of LF? */
2075                 int flags               /* should the bessage be exported clean? */
2076 ) {
2077         int i;
2078         const char *nl; /* newline string */
2079         int nlen;
2080         struct ma_info ma;
2081
2082         /* Buffers needed for RFC822 translation.  These are all filled
2083          * using functions that are bounds-checked, and therefore we can
2084          * make them substantially smaller than SIZ.
2085          */
2086         char suser[100];
2087         char luser[100];
2088         char fuser[100];
2089         char snode[100];
2090         char mid[100];
2091
2092         syslog(LOG_DEBUG, "CtdlOutputPreLoadedMsg(TheMessage=%s, %d, %d, %d, %d\n",
2093                    ((TheMessage == NULL) ? "NULL" : "not null"),
2094                    mode, headers_only, do_proto, crlf);
2095
2096         strcpy(mid, "unknown");
2097         nl = (crlf ? "\r\n" : "\n");
2098         nlen = crlf ? 2 : 1;
2099
2100         if (!CM_IsValidMsg(TheMessage)) {
2101                 syslog(LOG_ERR,
2102                             "ERROR: invalid preloaded message for output\n");
2103                 cit_backtrace ();
2104                 return(om_no_such_msg);
2105         }
2106
2107         /* Suppress envelope recipients if required to avoid disclosing BCC addresses.
2108          * Pad it with spaces in order to avoid changing the RFC822 length of the message.
2109          */
2110         if ( (flags & SUPPRESS_ENV_TO) && (!CM_IsEmpty(TheMessage, eenVelopeTo)) ) {
2111                 memset(TheMessage->cm_fields[eenVelopeTo], ' ', TheMessage->cm_lengths[eenVelopeTo]);
2112         }
2113
2114         /* Are we downloading a MIME component? */
2115         if (mode == MT_DOWNLOAD) {
2116                 if (TheMessage->cm_format_type != FMT_RFC822) {
2117                         if (do_proto)
2118                                 cprintf("%d This is not a MIME message.\n",
2119                                 ERROR + ILLEGAL_VALUE);
2120                 } else if (CC->download_fp != NULL) {
2121                         if (do_proto) cprintf(
2122                                 "%d You already have a download open.\n",
2123                                 ERROR + RESOURCE_BUSY);
2124                 } else {
2125                         /* Parse the message text component */
2126                         mime_parser(CM_RANGE(TheMessage, eMesageText),
2127                                     *mime_download, NULL, NULL, NULL, 0);
2128                         /* If there's no file open by this time, the requested
2129                          * section wasn't found, so print an error
2130                          */
2131                         if (CC->download_fp == NULL) {
2132                                 if (do_proto) cprintf(
2133                                         "%d Section %s not found.\n",
2134                                         ERROR + FILE_NOT_FOUND,
2135                                         CC->download_desired_section);
2136                         }
2137                 }
2138                 return((CC->download_fp != NULL) ? om_ok : om_mime_error);
2139         }
2140
2141         /* MT_SPEW_SECTION is like MT_DOWNLOAD except it outputs the whole MIME part
2142          * in a single server operation instead of opening a download file.
2143          */
2144         if (mode == MT_SPEW_SECTION) {
2145                 if (TheMessage->cm_format_type != FMT_RFC822) {
2146                         if (do_proto)
2147                                 cprintf("%d This is not a MIME message.\n",
2148                                 ERROR + ILLEGAL_VALUE);
2149                 } else {
2150                         /* Parse the message text component */
2151                         int found_it = 0;
2152
2153                         mime_parser(CM_RANGE(TheMessage, eMesageText),
2154                                     *mime_spew_section, NULL, NULL, (void *)&found_it, 0);
2155                         /* If section wasn't found, print an error
2156                          */
2157                         if (!found_it) {
2158                                 if (do_proto) cprintf(
2159                                         "%d Section %s not found.\n",
2160                                         ERROR + FILE_NOT_FOUND,
2161                                         CC->download_desired_section);
2162                         }
2163                 }
2164                 return((CC->download_fp != NULL) ? om_ok : om_mime_error);
2165         }
2166
2167         /* now for the user-mode message reading loops */
2168         if (do_proto) cprintf("%d msg:\n", LISTING_FOLLOWS);
2169
2170         /* Does the caller want to skip the headers? */
2171         if (headers_only == HEADERS_NONE) goto START_TEXT;
2172
2173         /* Tell the client which format type we're using. */
2174         if ( (mode == MT_CITADEL) && (do_proto) ) {
2175                 cprintf("type=%d\n", TheMessage->cm_format_type);
2176         }
2177
2178         /* nhdr=yes means that we're only displaying headers, no body */
2179         if ( (TheMessage->cm_anon_type == MES_ANONONLY)
2180            && ((mode == MT_CITADEL) || (mode == MT_MIME))
2181            && (do_proto)
2182            ) {
2183                 cprintf("nhdr=yes\n");
2184         }
2185
2186         if ((mode == MT_CITADEL) || (mode == MT_MIME))
2187                 OutputCtdlMsgHeaders(TheMessage, do_proto);
2188
2189
2190         /* begin header processing loop for RFC822 transfer format */
2191         strcpy(suser, "");
2192         strcpy(luser, "");
2193         strcpy(fuser, "");
2194         memcpy(snode, CtdlGetConfigStr("c_nodename"), strlen(CtdlGetConfigStr("c_nodename")) + 1);
2195         if (mode == MT_RFC822)
2196                 OutputRFC822MsgHeaders(
2197                         TheMessage,
2198                         flags,
2199                         nl, nlen,
2200                         mid, sizeof(mid),
2201                         suser, sizeof(suser),
2202                         luser, sizeof(luser),
2203                         fuser, sizeof(fuser),
2204                         snode, sizeof(snode)
2205                         );
2206
2207
2208         for (i=0; !IsEmptyStr(&suser[i]); ++i) {
2209                 suser[i] = tolower(suser[i]);
2210                 if (!isalnum(suser[i])) suser[i]='_';
2211         }
2212
2213         if (mode == MT_RFC822) {
2214                 if (!strcasecmp(snode, NODENAME)) {
2215                         safestrncpy(snode, FQDN, sizeof snode);
2216                 }
2217
2218                 /* Construct a fun message id */
2219                 cprintf("Message-ID: <%s", mid);/// todo: this possibly breaks threadding mails.
2220                 if (strchr(mid, '@')==NULL) {
2221                         cprintf("@%s", snode);
2222                 }
2223                 cprintf(">%s", nl);
2224
2225                 if (!is_room_aide() && (TheMessage->cm_anon_type == MES_ANONONLY)) {
2226                         cprintf("From: \"----\" <x@x.org>%s", nl);
2227                 }
2228                 else if (!is_room_aide() && (TheMessage->cm_anon_type == MES_ANONOPT)) {
2229                         cprintf("From: \"anonymous\" <x@x.org>%s", nl);
2230                 }
2231                 else if (!IsEmptyStr(fuser)) {
2232                         cprintf("From: \"%s\" <%s>%s", luser, fuser, nl);
2233                 }
2234                 else {
2235                         cprintf("From: \"%s\" <%s@%s>%s", luser, suser, snode, nl);
2236                 }
2237
2238                 /* Blank line signifying RFC822 end-of-headers */
2239                 if (TheMessage->cm_format_type != FMT_RFC822) {
2240                         cprintf("%s", nl);
2241                 }
2242         }
2243
2244         /* end header processing loop ... at this point, we're in the text */
2245 START_TEXT:
2246         if (headers_only == HEADERS_FAST) goto DONE;
2247
2248         /* Tell the client about the MIME parts in this message */
2249         if (TheMessage->cm_format_type == FMT_RFC822) {
2250                 if ( (mode == MT_CITADEL) || (mode == MT_MIME) ) {
2251                         memset(&ma, 0, sizeof(struct ma_info));
2252                         mime_parser(CM_RANGE(TheMessage, eMesageText),
2253                                 (do_proto ? *list_this_part : NULL),
2254                                 (do_proto ? *list_this_pref : NULL),
2255                                 (do_proto ? *list_this_suff : NULL),
2256                                 (void *)&ma, 1);
2257                 }
2258                 else if (mode == MT_RFC822) {   /* unparsed RFC822 dump */
2259                         Dump_RFC822HeadersBody(
2260                                 TheMessage,
2261                                 headers_only,
2262                                 flags,
2263                                 nl, nlen);
2264                         goto DONE;
2265                 }
2266         }
2267
2268         if (headers_only == HEADERS_ONLY) {
2269                 goto DONE;
2270         }
2271
2272         /* signify start of msg text */
2273         if ( (mode == MT_CITADEL) || (mode == MT_MIME) ) {
2274                 if (do_proto) cprintf("text\n");
2275         }
2276
2277         if (TheMessage->cm_format_type == FMT_FIXED)
2278                 DumpFormatFixed(
2279                         TheMessage,
2280                         mode,           /* how would you like that message? */
2281                         nl, nlen);
2282
2283         /* If the message on disk is format 0 (Citadel vari-format), we
2284          * output using the formatter at 80 columns.  This is the final output
2285          * form if the transfer format is RFC822, but if the transfer format
2286          * is Citadel proprietary, it'll still work, because the indentation
2287          * for new paragraphs is correct and the client will reformat the
2288          * message to the reader's screen width.
2289          */
2290         if (TheMessage->cm_format_type == FMT_CITADEL) {
2291                 if (mode == MT_MIME) {
2292                         cprintf("Content-type: text/x-citadel-variformat\n\n");
2293                 }
2294                 memfmout(TheMessage->cm_fields[eMesageText], nl);
2295         }
2296
2297         /* If the message on disk is format 4 (MIME), we've gotta hand it
2298          * off to the MIME parser.  The client has already been told that
2299          * this message is format 1 (fixed format), so the callback function
2300          * we use will display those parts as-is.
2301          */
2302         if (TheMessage->cm_format_type == FMT_RFC822) {
2303                 memset(&ma, 0, sizeof(struct ma_info));
2304
2305                 if (mode == MT_MIME) {
2306                         ma.use_fo_hooks = 0;
2307                         strcpy(ma.chosen_part, "1");
2308                         ma.chosen_pref = 9999;
2309                         ma.dont_decode = CC->msg4_dont_decode;
2310                         mime_parser(CM_RANGE(TheMessage, eMesageText),
2311                                     *choose_preferred, *fixed_output_pre,
2312                                     *fixed_output_post, (void *)&ma, 1);
2313                         mime_parser(CM_RANGE(TheMessage, eMesageText),
2314                                     *output_preferred, NULL, NULL, (void *)&ma, 1);
2315                 }
2316                 else {
2317                         ma.use_fo_hooks = 1;
2318                         mime_parser(CM_RANGE(TheMessage, eMesageText),
2319                                     *fixed_output, *fixed_output_pre,
2320                                     *fixed_output_post, (void *)&ma, 0);
2321                 }
2322
2323         }
2324
2325 DONE:   /* now we're done */
2326         if (do_proto) cprintf("000\n");
2327         return(om_ok);
2328 }
2329
2330 /*
2331  * Save one or more message pointers into a specified room
2332  * (Returns 0 for success, nonzero for failure)
2333  * roomname may be NULL to use the current room
2334  *
2335  * Note that the 'supplied_msg' field may be set to NULL, in which case
2336  * the message will be fetched from disk, by number, if we need to perform
2337  * replication checks.  This adds an additional database read, so if the
2338  * caller already has the message in memory then it should be supplied.  (Obviously
2339  * this mode of operation only works if we're saving a single message.)
2340  */
2341 int CtdlSaveMsgPointersInRoom(char *roomname, long newmsgidlist[], int num_newmsgs,
2342                         int do_repl_check, struct CtdlMessage *supplied_msg, int suppress_refcount_adj
2343 ) {
2344         int i, j, unique;
2345         char hold_rm[ROOMNAMELEN];
2346         struct cdbdata *cdbfr;
2347         int num_msgs;
2348         long *msglist;
2349         long highest_msg = 0L;
2350
2351         long msgid = 0;
2352         struct CtdlMessage *msg = NULL;
2353
2354         long *msgs_to_be_merged = NULL;
2355         int num_msgs_to_be_merged = 0;
2356
2357         syslog(LOG_DEBUG,
2358                    "CtdlSaveMsgPointersInRoom(room=%s, num_msgs=%d, repl=%d, suppress_rca=%d)\n",
2359                    roomname, num_newmsgs, do_repl_check, suppress_refcount_adj
2360         );
2361
2362         strcpy(hold_rm, CC->room.QRname);
2363
2364         /* Sanity checks */
2365         if (newmsgidlist == NULL) return(ERROR + INTERNAL_ERROR);
2366         if (num_newmsgs < 1) return(ERROR + INTERNAL_ERROR);
2367         if (num_newmsgs > 1) supplied_msg = NULL;
2368
2369         /* Now the regular stuff */
2370         if (CtdlGetRoomLock(&CC->room,
2371            ((roomname != NULL) ? roomname : CC->room.QRname) )
2372            != 0) {
2373                 syslog(LOG_ERR, "No such room <%s>\n", roomname);
2374                 return(ERROR + ROOM_NOT_FOUND);
2375         }
2376
2377
2378         msgs_to_be_merged = malloc(sizeof(long) * num_newmsgs);
2379         num_msgs_to_be_merged = 0;
2380
2381
2382         cdbfr = cdb_fetch(CDB_MSGLISTS, &CC->room.QRnumber, sizeof(long));
2383         if (cdbfr == NULL) {
2384                 msglist = NULL;
2385                 num_msgs = 0;
2386         } else {
2387                 msglist = (long *) cdbfr->ptr;
2388                 cdbfr->ptr = NULL;      /* CtdlSaveMsgPointerInRoom() now owns this memory */
2389                 num_msgs = cdbfr->len / sizeof(long);
2390                 cdb_free(cdbfr);
2391         }
2392
2393
2394         /* Create a list of msgid's which were supplied by the caller, but do
2395          * not already exist in the target room.  It is absolutely taboo to
2396          * have more than one reference to the same message in a room.
2397          */
2398         for (i=0; i<num_newmsgs; ++i) {
2399                 unique = 1;
2400                 if (num_msgs > 0) for (j=0; j<num_msgs; ++j) {
2401                         if (msglist[j] == newmsgidlist[i]) {
2402                                 unique = 0;
2403                         }
2404                 }
2405                 if (unique) {
2406                         msgs_to_be_merged[num_msgs_to_be_merged++] = newmsgidlist[i];
2407                 }
2408         }
2409
2410         syslog(LOG_DEBUG, "%d unique messages to be merged\n", num_msgs_to_be_merged);
2411
2412         /*
2413          * Now merge the new messages
2414          */
2415         msglist = realloc(msglist, (sizeof(long) * (num_msgs + num_msgs_to_be_merged)) );
2416         if (msglist == NULL) {
2417                 syslog(LOG_ALERT, "ERROR: can't realloc message list!\n");
2418                 free(msgs_to_be_merged);
2419                 return (ERROR + INTERNAL_ERROR);
2420         }
2421         memcpy(&msglist[num_msgs], msgs_to_be_merged, (sizeof(long) * num_msgs_to_be_merged) );
2422         num_msgs += num_msgs_to_be_merged;
2423
2424         /* Sort the message list, so all the msgid's are in order */
2425         num_msgs = sort_msglist(msglist, num_msgs);
2426
2427         /* Determine the highest message number */
2428         highest_msg = msglist[num_msgs - 1];
2429
2430         /* Write it back to disk. */
2431         cdb_store(CDB_MSGLISTS, &CC->room.QRnumber, (int)sizeof(long),
2432                   msglist, (int)(num_msgs * sizeof(long)));
2433
2434         /* Free up the memory we used. */
2435         free(msglist);
2436
2437         /* Update the highest-message pointer and unlock the room. */
2438         CC->room.QRhighest = highest_msg;
2439         CtdlPutRoomLock(&CC->room);
2440
2441         /* Perform replication checks if necessary */
2442         if ( (DoesThisRoomNeedEuidIndexing(&CC->room)) && (do_repl_check) ) {
2443                 syslog(LOG_DEBUG, "CtdlSaveMsgPointerInRoom() doing repl checks\n");
2444
2445                 for (i=0; i<num_msgs_to_be_merged; ++i) {
2446                         msgid = msgs_to_be_merged[i];
2447
2448                         if (supplied_msg != NULL) {
2449                                 msg = supplied_msg;
2450                         }
2451                         else {
2452                                 msg = CtdlFetchMessage(msgid, 0, 1);
2453                         }
2454
2455                         if (msg != NULL) {
2456                                 ReplicationChecks(msg);
2457
2458                                 /* If the message has an Exclusive ID, index that... */
2459                                 if (!CM_IsEmpty(msg, eExclusiveID)) {
2460                                         index_message_by_euid(msg->cm_fields[eExclusiveID], &CC->room, msgid);
2461                                 }
2462
2463                                 /* Free up the memory we may have allocated */
2464                                 if (msg != supplied_msg) {
2465                                         CM_Free(msg);
2466                                 }
2467                         }
2468
2469                 }
2470         }
2471
2472         else {
2473                 syslog(LOG_DEBUG, "CtdlSaveMsgPointerInRoom() skips repl checks\n");
2474         }
2475
2476         /* Submit this room for processing by hooks */
2477         PerformRoomHooks(&CC->room);
2478
2479         /* Go back to the room we were in before we wandered here... */
2480         CtdlGetRoom(&CC->room, hold_rm);
2481
2482         /* Bump the reference count for all messages which were merged */
2483         if (!suppress_refcount_adj) {
2484                 AdjRefCountList(msgs_to_be_merged, num_msgs_to_be_merged, +1);
2485         }
2486
2487         /* Free up memory... */
2488         if (msgs_to_be_merged != NULL) {
2489                 free(msgs_to_be_merged);
2490         }
2491
2492         /* Return success. */
2493         return (0);
2494 }
2495
2496
2497 /*
2498  * This is the same as CtdlSaveMsgPointersInRoom() but it only accepts
2499  * a single message.
2500  */
2501 int CtdlSaveMsgPointerInRoom(char *roomname, long msgid,
2502                              int do_repl_check, struct CtdlMessage *supplied_msg)
2503 {
2504         return CtdlSaveMsgPointersInRoom(roomname, &msgid, 1, do_repl_check, supplied_msg, 0);
2505 }
2506
2507
2508
2509
2510 /*
2511  * Message base operation to save a new message to the message store
2512  * (returns new message number)
2513  *
2514  * This is the back end for CtdlSubmitMsg() and should not be directly
2515  * called by server-side modules.
2516  *
2517  */
2518 long CtdlSaveThisMessage(struct CtdlMessage *msg, long msgid, int Reply) {
2519         long retval;
2520         struct ser_ret smr;
2521         int is_bigmsg = 0;
2522         char *holdM = NULL;
2523         long holdMLen = 0;
2524
2525         /*
2526          * If the message is big, set its body aside for storage elsewhere
2527          * and we hide the message body from the serializer
2528          */
2529         if (!CM_IsEmpty(msg, eMesageText) && msg->cm_lengths[eMesageText] > BIGMSG)
2530         {
2531                 is_bigmsg = 1;
2532                 holdM = msg->cm_fields[eMesageText];
2533                 msg->cm_fields[eMesageText] = NULL;
2534                 holdMLen = msg->cm_lengths[eMesageText];
2535                 msg->cm_lengths[eMesageText] = 0;
2536         }
2537
2538         /* Serialize our data structure for storage in the database */
2539         CtdlSerializeMessage(&smr, msg);
2540
2541         if (is_bigmsg) {
2542                 /* put the message body back into the message */
2543                 msg->cm_fields[eMesageText] = holdM;
2544                 msg->cm_lengths[eMesageText] = holdMLen;
2545         }
2546
2547         if (smr.len == 0) {
2548                 if (Reply) {
2549                         cprintf("%d Unable to serialize message\n",
2550                                 ERROR + INTERNAL_ERROR);
2551                 }
2552                 else {
2553                         syslog(LOG_ERR, "CtdlSaveMessage() unable to serialize message");
2554
2555                 }
2556                 return (-1L);
2557         }
2558
2559         /* Write our little bundle of joy into the message base */
2560         retval = cdb_store(CDB_MSGMAIN, &msgid, (int)sizeof(long),
2561                            smr.ser, smr.len);
2562         if (retval < 0) {
2563                 syslog(LOG_ERR, "Can't store message %ld: %ld", msgid, retval);
2564         }
2565         else {
2566                 if (is_bigmsg) {
2567                         retval = cdb_store(CDB_BIGMSGS,
2568                                            &msgid,
2569                                            (int)sizeof(long),
2570                                            holdM,
2571                                            (holdMLen + 1)
2572                                 );
2573                         if (retval < 0) {
2574                                 syslog(LOG_ERR, "failed to store message body for msgid %ld:  %ld",
2575                                            msgid, retval);
2576                         }
2577                 }
2578         }
2579
2580         /* Free the memory we used for the serialized message */
2581         free(smr.ser);
2582
2583         return(retval);
2584 }
2585
2586 long send_message(struct CtdlMessage *msg) {
2587         long newmsgid;
2588         long retval;
2589         char msgidbuf[256];
2590         long msgidbuflen;
2591
2592         /* Get a new message number */
2593         newmsgid = get_new_message_number();
2594
2595         /* Generate an ID if we don't have one already */
2596         if (CM_IsEmpty(msg, emessageId)) {
2597                 msgidbuflen = snprintf(msgidbuf, sizeof msgidbuf, "%08lX-%08lX@%s",
2598                                        (long unsigned int) time(NULL),
2599                                        (long unsigned int) newmsgid,
2600                                        CtdlGetConfigStr("c_fqdn")
2601                         );
2602
2603                 CM_SetField(msg, emessageId, msgidbuf, msgidbuflen);
2604         }
2605
2606         retval = CtdlSaveThisMessage(msg, newmsgid, 1);
2607
2608         if (retval == 0) {
2609                 retval = newmsgid;
2610         }
2611
2612         /* Return the *local* message ID to the caller
2613          * (even if we're storing an incoming network message)
2614          */
2615         return(retval);
2616 }
2617
2618
2619
2620 /*
2621  * Serialize a struct CtdlMessage into the format used on disk and network.
2622  *
2623  * This function loads up a "struct ser_ret" (defined in server.h) which
2624  * contains the length of the serialized message and a pointer to the
2625  * serialized message in memory.  THE LATTER MUST BE FREED BY THE CALLER.
2626  */
2627 void CtdlSerializeMessage(struct ser_ret *ret,          /* return values */
2628                           struct CtdlMessage *msg)      /* unserialized msg */
2629 {
2630         size_t wlen;
2631         int i;
2632
2633         /*
2634          * Check for valid message format
2635          */
2636         if (CM_IsValidMsg(msg) == 0) {
2637                 syslog(LOG_ERR, "CtdlSerializeMessage() aborting due to invalid message\n");
2638                 ret->len = 0;
2639                 ret->ser = NULL;
2640                 return;
2641         }
2642
2643         ret->len = 3;
2644         for (i=0; i < NDiskFields; ++i)
2645                 if (msg->cm_fields[FieldOrder[i]] != NULL)
2646                         ret->len += msg->cm_lengths[FieldOrder[i]] + 2;
2647
2648         ret->ser = malloc(ret->len);
2649         if (ret->ser == NULL) {
2650                 syslog(LOG_ERR, "CtdlSerializeMessage() malloc(%ld) failed: %s\n",
2651                            (long)ret->len, strerror(errno));
2652                 ret->len = 0;
2653                 ret->ser = NULL;
2654                 return;
2655         }
2656
2657         ret->ser[0] = 0xFF;
2658         ret->ser[1] = msg->cm_anon_type;
2659         ret->ser[2] = msg->cm_format_type;
2660         wlen = 3;
2661
2662         for (i=0; i < NDiskFields; ++i)
2663                 if (msg->cm_fields[FieldOrder[i]] != NULL)
2664                 {
2665                         ret->ser[wlen++] = (char)FieldOrder[i];
2666
2667                         memcpy(&ret->ser[wlen],
2668                                msg->cm_fields[FieldOrder[i]],
2669                                msg->cm_lengths[FieldOrder[i]] + 1);
2670
2671                         wlen = wlen + msg->cm_lengths[FieldOrder[i]] + 1;
2672                 }
2673
2674         if (ret->len != wlen) {
2675                 syslog(LOG_ERR, "ERROR: len=%ld wlen=%ld\n",
2676                            (long)ret->len, (long)wlen);
2677         }
2678
2679         return;
2680 }
2681
2682
2683 /*
2684  * Check to see if any messages already exist in the current room which
2685  * carry the same Exclusive ID as this one.  If any are found, delete them.
2686  */
2687 void ReplicationChecks(struct CtdlMessage *msg) {
2688         long old_msgnum = (-1L);
2689
2690         if (DoesThisRoomNeedEuidIndexing(&CC->room) == 0) return;
2691
2692         syslog(LOG_DEBUG, "Performing replication checks in <%s>\n",
2693                    CC->room.QRname);
2694
2695         /* No exclusive id?  Don't do anything. */
2696         if (msg == NULL) return;
2697         if (CM_IsEmpty(msg, eExclusiveID)) return;
2698
2699         /*syslog(LOG_DEBUG, "Exclusive ID: <%s> for room <%s>\n",
2700           msg->cm_fields[eExclusiveID], CC->room.QRname);*/
2701
2702         old_msgnum = CtdlLocateMessageByEuid(msg->cm_fields[eExclusiveID], &CC->room);
2703         if (old_msgnum > 0L) {
2704                 syslog(LOG_DEBUG, "ReplicationChecks() replacing message %ld\n", old_msgnum);
2705                 CtdlDeleteMessages(CC->room.QRname, &old_msgnum, 1, "");
2706         }
2707 }
2708
2709
2710
2711 /*
2712  * Save a message to disk and submit it into the delivery system.
2713  */
2714 long CtdlSubmitMsg(struct CtdlMessage *msg,     /* message to save */
2715                    recptypes *recps,            /* recipients (if mail) */
2716                    const char *force,           /* force a particular room? */
2717                    int flags                    /* should the message be exported clean? */
2718         )
2719 {
2720         char hold_rm[ROOMNAMELEN];
2721         char actual_rm[ROOMNAMELEN];
2722         char force_room[ROOMNAMELEN];
2723         char content_type[SIZ];                 /* We have to learn this */
2724         char recipient[SIZ];
2725         char bounce_to[1024];
2726         const char *room;
2727         long newmsgid;
2728         const char *mptr = NULL;
2729         struct ctdluser userbuf;
2730         int a, i;
2731         struct MetaData smi;
2732         char *collected_addresses = NULL;
2733         struct addresses_to_be_filed *aptr = NULL;
2734         StrBuf *saved_rfc822_version = NULL;
2735         int qualified_for_journaling = 0;
2736
2737         syslog(LOG_DEBUG, "CtdlSubmitMsg() called\n");
2738         if (CM_IsValidMsg(msg) == 0) return(-1);        /* self check */
2739
2740         /* If this message has no timestamp, we take the liberty of
2741          * giving it one, right now.
2742          */
2743         if (CM_IsEmpty(msg, eTimestamp)) {
2744                 CM_SetFieldLONG(msg, eTimestamp, time(NULL));
2745         }
2746
2747         /* If this message has no path, we generate one.
2748          */
2749         if (CM_IsEmpty(msg, eMessagePath)) {
2750                 if (!CM_IsEmpty(msg, eAuthor)) {
2751                         CM_CopyField(msg, eMessagePath, eAuthor);
2752                         for (a=0; !IsEmptyStr(&msg->cm_fields[eMessagePath][a]); ++a) {
2753                                 if (isspace(msg->cm_fields[eMessagePath][a])) {
2754                                         msg->cm_fields[eMessagePath][a] = ' ';
2755                                 }
2756                         }
2757                 }
2758                 else {
2759                         CM_SetField(msg, eMessagePath, HKEY("unknown"));
2760                 }
2761         }
2762
2763         if (force == NULL) {
2764                 force_room[0] = '\0';
2765         }
2766         else {
2767                 strcpy(force_room, force);
2768         }
2769
2770         /* Learn about what's inside, because it's what's inside that counts */
2771         if (CM_IsEmpty(msg, eMesageText)) {
2772                 syslog(LOG_ERR, "ERROR: attempt to save message with NULL body\n");
2773                 return(-2);
2774         }
2775
2776         switch (msg->cm_format_type) {
2777         case 0:
2778                 strcpy(content_type, "text/x-citadel-variformat");
2779                 break;
2780         case 1:
2781                 strcpy(content_type, "text/plain");
2782                 break;
2783         case 4:
2784                 strcpy(content_type, "text/plain");
2785                 mptr = bmstrcasestr(msg->cm_fields[eMesageText], "Content-type:");
2786                 if (mptr != NULL) {
2787                         char *aptr;
2788                         safestrncpy(content_type, &mptr[13], sizeof content_type);
2789                         striplt(content_type);
2790                         aptr = content_type;
2791                         while (!IsEmptyStr(aptr)) {
2792                                 if ((*aptr == ';')
2793                                     || (*aptr == ' ')
2794                                     || (*aptr == 13)
2795                                     || (*aptr == 10)) {
2796                                         *aptr = 0;
2797                                 }
2798                                 else aptr++;
2799                         }
2800                 }
2801         }
2802
2803         /* Goto the correct room */
2804         room = (recps) ? CC->room.QRname : SENTITEMS;
2805         syslog(LOG_DEBUG, "Selected room %s\n", room);
2806         strcpy(hold_rm, CC->room.QRname);
2807         strcpy(actual_rm, CC->room.QRname);
2808         if (recps != NULL) {
2809                 strcpy(actual_rm, SENTITEMS);
2810         }
2811
2812         /* If the user is a twit, move to the twit room for posting */
2813         if (TWITDETECT) {
2814                 if (CC->user.axlevel == AxProbU) {
2815                         strcpy(hold_rm, actual_rm);
2816                         strcpy(actual_rm, CtdlGetConfigStr("c_twitroom"));
2817                         syslog(LOG_DEBUG, "Diverting to twit room\n");
2818                 }
2819         }
2820
2821         /* ...or if this message is destined for Aide> then go there. */
2822         if (!IsEmptyStr(force_room)) {
2823                 strcpy(actual_rm, force_room);
2824         }
2825
2826         syslog(LOG_DEBUG, "Final selection: %s (%s)\n", actual_rm, room);
2827         if (strcasecmp(actual_rm, CC->room.QRname)) {
2828                 /* CtdlGetRoom(&CC->room, actual_rm); */
2829                 CtdlUserGoto(actual_rm, 0, 1, NULL, NULL, NULL, NULL);
2830         }
2831
2832         /*
2833          * If this message has no O (room) field, generate one.
2834          */
2835         if (CM_IsEmpty(msg, eOriginalRoom) && !IsEmptyStr(CC->room.QRname)) {
2836                 CM_SetField(msg, eOriginalRoom, CC->room.QRname, strlen(CC->room.QRname));
2837         }
2838
2839         /* Perform "before save" hooks (aborting if any return nonzero) */
2840         syslog(LOG_DEBUG, "Performing before-save hooks\n");
2841         if (PerformMessageHooks(msg, recps, EVT_BEFORESAVE) > 0) return(-3);
2842
2843         /*
2844          * If this message has an Exclusive ID, and the room is replication
2845          * checking enabled, then do replication checks.
2846          */
2847         if (DoesThisRoomNeedEuidIndexing(&CC->room)) {
2848                 ReplicationChecks(msg);
2849         }
2850
2851         /* Save it to disk */
2852         syslog(LOG_DEBUG, "Saving to disk\n");
2853         newmsgid = send_message(msg);
2854         if (newmsgid <= 0L) return(-5);
2855
2856         /* Write a supplemental message info record.  This doesn't have to
2857          * be a critical section because nobody else knows about this message
2858          * yet.
2859          */
2860         syslog(LOG_DEBUG, "Creating MetaData record\n");
2861         memset(&smi, 0, sizeof(struct MetaData));
2862         smi.meta_msgnum = newmsgid;
2863         smi.meta_refcount = 0;
2864         safestrncpy(smi.meta_content_type, content_type,
2865                     sizeof smi.meta_content_type);
2866
2867         /*
2868          * Measure how big this message will be when rendered as RFC822.
2869          * We do this for two reasons:
2870          * 1. We need the RFC822 length for the new metadata record, so the
2871          *    POP and IMAP services don't have to calculate message lengths
2872          *    while the user is waiting (multiplied by potentially hundreds
2873          *    or thousands of messages).
2874          * 2. If journaling is enabled, we will need an RFC822 version of the
2875          *    message to attach to the journalized copy.
2876          */
2877         if (CC->redirect_buffer != NULL) {
2878                 syslog(LOG_ALERT, "CC->redirect_buffer is not NULL during message submission!\n");
2879                 abort();
2880         }
2881         CC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
2882         CtdlOutputPreLoadedMsg(msg, MT_RFC822, HEADERS_ALL, 0, 1, QP_EADDR);
2883         smi.meta_rfc822_length = StrLength(CC->redirect_buffer);
2884         saved_rfc822_version = CC->redirect_buffer;
2885         CC->redirect_buffer = NULL;
2886
2887         PutMetaData(&smi);
2888
2889         /* Now figure out where to store the pointers */
2890         syslog(LOG_DEBUG, "Storing pointers\n");
2891
2892         /* If this is being done by the networker delivering a private
2893          * message, we want to BYPASS saving the sender's copy (because there
2894          * is no local sender; it would otherwise go to the Trashcan).
2895          */
2896         if ((!CC->internal_pgm) || (recps == NULL)) {
2897                 if (CtdlSaveMsgPointerInRoom(actual_rm, newmsgid, 1, msg) != 0) {
2898                         syslog(LOG_ERR, "ERROR saving message pointer!\n");
2899                         CtdlSaveMsgPointerInRoom(CtdlGetConfigStr("c_aideroom"), newmsgid, 0, msg);
2900                 }
2901         }
2902
2903         /* For internet mail, drop a copy in the outbound queue room */
2904         if ((recps != NULL) && (recps->num_internet > 0)) {
2905                 CtdlSaveMsgPointerInRoom(SMTP_SPOOLOUT_ROOM, newmsgid, 0, msg);
2906         }
2907
2908         /* If other rooms are specified, drop them there too. */
2909         if ((recps != NULL) && (recps->num_room > 0))
2910                 for (i=0; i<num_tokens(recps->recp_room, '|'); ++i) {
2911                         extract_token(recipient, recps->recp_room, i,
2912                                       '|', sizeof recipient);
2913                         syslog(LOG_DEBUG, "Delivering to room <%s>\n", recipient);///// xxxx
2914                         CtdlSaveMsgPointerInRoom(recipient, newmsgid, 0, msg);
2915                 }
2916
2917         /* Bump this user's messages posted counter. */
2918         syslog(LOG_DEBUG, "Updating user\n");
2919         CtdlLockGetCurrentUser();
2920         CC->user.posted = CC->user.posted + 1;
2921         CtdlPutCurrentUserLock();
2922
2923         /* Decide where bounces need to be delivered */
2924         if ((recps != NULL) && (recps->bounce_to == NULL))
2925         {
2926                 if (CC->logged_in)
2927                         snprintf(bounce_to, sizeof bounce_to, "%s@%s",
2928                                  CC->user.fullname, CtdlGetConfigStr("c_nodename"));
2929                 else
2930                         snprintf(bounce_to, sizeof bounce_to, "%s@%s",
2931                                  msg->cm_fields[eAuthor], msg->cm_fields[eNodeName]);
2932                 recps->bounce_to = bounce_to;
2933         }
2934
2935         CM_SetFieldLONG(msg, eVltMsgNum, newmsgid);
2936
2937
2938         /* If this is private, local mail, make a copy in the
2939          * recipient's mailbox and bump the reference count.
2940          */
2941         if ((recps != NULL) && (recps->num_local > 0))
2942         {
2943                 char *pch;
2944                 int ntokens;
2945
2946                 pch = recps->recp_local;
2947                 recps->recp_local = recipient;
2948                 ntokens = num_tokens(pch, '|');
2949                 for (i=0; i<ntokens; ++i)
2950                 {
2951                         extract_token(recipient, pch, i, '|', sizeof recipient);
2952                         syslog(LOG_DEBUG, "Delivering private local mail to <%s>\n", recipient);
2953                         if (CtdlGetUser(&userbuf, recipient) == 0) {
2954                                 CtdlMailboxName(actual_rm, sizeof actual_rm, &userbuf, MAILROOM);
2955                                 CtdlSaveMsgPointerInRoom(actual_rm, newmsgid, 0, msg);
2956                                 CtdlBumpNewMailCounter(userbuf.usernum);
2957                                 PerformMessageHooks(msg, recps, EVT_AFTERUSRMBOXSAVE);
2958                         }
2959                         else {
2960                                 syslog(LOG_DEBUG, "No user <%s>\n", recipient);
2961                                 CtdlSaveMsgPointerInRoom(CtdlGetConfigStr("c_aideroom"), newmsgid, 0, msg);
2962                         }
2963                 }
2964                 recps->recp_local = pch;
2965         }
2966
2967         /* Perform "after save" hooks */
2968         syslog(LOG_DEBUG, "Performing after-save hooks\n");
2969
2970         PerformMessageHooks(msg, recps, EVT_AFTERSAVE);
2971         CM_FlushField(msg, eVltMsgNum);
2972
2973         /* Go back to the room we started from */
2974         syslog(LOG_DEBUG, "Returning to original room %s\n", hold_rm);
2975         if (strcasecmp(hold_rm, CC->room.QRname))
2976                 CtdlUserGoto(hold_rm, 0, 1, NULL, NULL, NULL, NULL);
2977
2978         /*
2979          * Any addresses to harvest for someone's address book?
2980          */
2981         if ( (CC->logged_in) && (recps != NULL) ) {
2982                 collected_addresses = harvest_collected_addresses(msg);
2983         }
2984
2985         if (collected_addresses != NULL) {
2986                 aptr = (struct addresses_to_be_filed *)
2987                         malloc(sizeof(struct addresses_to_be_filed));
2988                 CtdlMailboxName(actual_rm, sizeof actual_rm,
2989                                 &CC->user, USERCONTACTSROOM);
2990                 aptr->roomname = strdup(actual_rm);
2991                 aptr->collected_addresses = collected_addresses;
2992                 begin_critical_section(S_ATBF);
2993                 aptr->next = atbf;
2994                 atbf = aptr;
2995                 end_critical_section(S_ATBF);
2996         }
2997
2998         /*
2999          * Determine whether this message qualifies for journaling.
3000          */
3001         if (!CM_IsEmpty(msg, eJournal)) {
3002                 qualified_for_journaling = 0;
3003         }
3004         else {
3005                 if (recps == NULL) {
3006                         qualified_for_journaling = CtdlGetConfigInt("c_journal_pubmsgs");
3007                 }
3008                 else if (recps->num_local + recps->num_ignet + recps->num_internet > 0) {
3009                         qualified_for_journaling = CtdlGetConfigInt("c_journal_email");
3010                 }
3011                 else {
3012                         qualified_for_journaling = CtdlGetConfigInt("c_journal_pubmsgs");
3013                 }
3014         }
3015
3016         /*
3017          * Do we have to perform journaling?  If so, hand off the saved
3018          * RFC822 version will be handed off to the journaler for background
3019          * submit.  Otherwise, we have to free the memory ourselves.
3020          */
3021         if (saved_rfc822_version != NULL) {
3022                 if (qualified_for_journaling) {
3023                         JournalBackgroundSubmit(msg, saved_rfc822_version, recps);
3024                 }
3025                 else {
3026                         FreeStrBuf(&saved_rfc822_version);
3027                 }
3028         }
3029
3030         if ((recps != NULL) && (recps->bounce_to == bounce_to))
3031                 recps->bounce_to = NULL;
3032
3033         /* Done. */
3034         return(newmsgid);
3035 }
3036
3037
3038 /*
3039  * Convenience function for generating small administrative messages.
3040  */
3041 long quickie_message(const char *from,
3042                      const char *fromaddr,
3043                      const char *to,
3044                      char *room,
3045                      const char *text,
3046                      int format_type,
3047                      const char *subject)
3048 {
3049         struct CtdlMessage *msg;
3050         recptypes *recp = NULL;
3051
3052         msg = malloc(sizeof(struct CtdlMessage));
3053         memset(msg, 0, sizeof(struct CtdlMessage));
3054         msg->cm_magic = CTDLMESSAGE_MAGIC;
3055         msg->cm_anon_type = MES_NORMAL;
3056         msg->cm_format_type = format_type;
3057
3058         if (!IsEmptyStr(from)) {
3059                 CM_SetField(msg, eAuthor, from, strlen(from));
3060         }
3061         else if (!IsEmptyStr(fromaddr)) {
3062                 char *pAt;
3063                 CM_SetField(msg, eAuthor, fromaddr, strlen(fromaddr));
3064                 pAt = strchr(msg->cm_fields[eAuthor], '@');
3065                 if (pAt != NULL) {
3066                         CM_CutFieldAt(msg, eAuthor, pAt - msg->cm_fields[eAuthor]);
3067                 }
3068         }
3069         else {
3070                 msg->cm_fields[eAuthor] = strdup("Citadel");
3071         }
3072
3073         if (!IsEmptyStr(fromaddr)) CM_SetField(msg, erFc822Addr, fromaddr, strlen(fromaddr));
3074         if (!IsEmptyStr(room)) CM_SetField(msg, eOriginalRoom, room, strlen(room));
3075         CM_SetField(msg, eNodeName, CtdlGetConfigStr("c_nodename"), strlen(CtdlGetConfigStr("c_nodename")));
3076         if (!IsEmptyStr(to)) {
3077                 CM_SetField(msg, eRecipient, to, strlen(to));
3078                 recp = validate_recipients(to, NULL, 0);
3079         }
3080         if (!IsEmptyStr(subject)) {
3081                 CM_SetField(msg, eMsgSubject, subject, strlen(subject));
3082         }
3083         if (!IsEmptyStr(text)) {
3084                 CM_SetField(msg, eMesageText, text, strlen(text));
3085         }
3086
3087         long msgnum = CtdlSubmitMsg(msg, recp, room, 0);
3088         CM_Free(msg);
3089         if (recp != NULL) free_recipients(recp);
3090         return msgnum;
3091 }
3092
3093
3094 void flood_protect_quickie_message(const char *from,
3095                                    const char *fromaddr,
3096                                    const char *to,
3097                                    char *room,
3098                                    const char *text,
3099                                    int format_type,
3100                                    const char *subject,
3101                                    int nCriterions,
3102                                    const char **CritStr,
3103                                    const long *CritStrLen,
3104                                    long ccid,
3105                                    long ioid,
3106                                    time_t NOW)
3107 {
3108         int i;
3109         u_char rawdigest[MD5_DIGEST_LEN];
3110         struct MD5Context md5context;
3111         StrBuf *guid;
3112         char timestamp[64];
3113         long tslen;
3114         static const time_t tsday = (8*60*60); /* just care for a day... */
3115         time_t seenstamp;
3116
3117         tslen = snprintf(timestamp, sizeof(timestamp), "%ld", tsday);
3118         MD5Init(&md5context);
3119
3120         for (i = 0; i < nCriterions; i++)
3121                 MD5Update(&md5context,
3122                           (const unsigned char*)CritStr[i], CritStrLen[i]);
3123         MD5Update(&md5context,
3124                   (const unsigned char*)timestamp, tslen);
3125         MD5Final(rawdigest, &md5context);
3126
3127         guid = NewStrBufPlain(NULL,
3128                               MD5_DIGEST_LEN * 2 + 12);
3129         StrBufHexEscAppend(guid, NULL, rawdigest, MD5_DIGEST_LEN);
3130         StrBufAppendBufPlain(guid, HKEY("_fldpt"), 0);
3131         if (StrLength(guid) > 40)
3132                 StrBufCutAt(guid, 40, NULL);
3133
3134         seenstamp = CheckIfAlreadySeen("FPAideMessage",
3135                                        guid,
3136                                        NOW,
3137                                        tsday,
3138                                        eUpdate,
3139                                        ccid,
3140                                        ioid);
3141         if ((seenstamp > 0) && (seenstamp < tsday))
3142         {
3143                 FreeStrBuf(&guid);
3144                 /* yes, we did. flood protection kicks in. */
3145                 syslog(LOG_DEBUG,
3146                            "not sending message again - %ld < %ld \n", seenstamp, tsday);
3147                 return;
3148         }
3149         else
3150         {
3151                 syslog(LOG_DEBUG,
3152                            "sending message. %ld >= %ld", seenstamp, tsday);
3153                 FreeStrBuf(&guid);
3154                 /* no, this message isn't sent recently; go ahead. */
3155                 quickie_message(from,
3156                                 fromaddr,
3157                                 to,
3158                                 room,
3159                                 text,
3160                                 format_type,
3161                                 subject);
3162         }
3163 }
3164
3165
3166 /*
3167  * Back end function used by CtdlMakeMessage() and similar functions
3168  */
3169 StrBuf *CtdlReadMessageBodyBuf(char *terminator,        /* token signalling EOT */
3170                                long tlen,
3171                                size_t maxlen,           /* maximum message length */
3172                                StrBuf *exist,           /* if non-null, append to it;
3173                                                            exist is ALWAYS freed  */
3174                                int crlf,                /* CRLF newlines instead of LF */
3175                                int *sock                /* socket handle or 0 for this session's client socket */
3176         )
3177 {
3178         StrBuf *Message;
3179         StrBuf *LineBuf;
3180         int flushing = 0;
3181         int finished = 0;
3182         int dotdot = 0;
3183
3184         LineBuf = NewStrBufPlain(NULL, SIZ);
3185         if (exist == NULL) {
3186                 Message = NewStrBufPlain(NULL, 4 * SIZ);
3187         }
3188         else {
3189                 Message = NewStrBufDup(exist);
3190         }
3191
3192         /* Do we need to change leading ".." to "." for SMTP escaping? */
3193         if ((tlen == 1) && (*terminator == '.')) {
3194                 dotdot = 1;
3195         }
3196
3197         /* read in the lines of message text one by one */
3198         do {
3199                 if (sock != NULL) {
3200                         if ((CtdlSockGetLine(sock, LineBuf, 5) < 0) ||
3201                             (*sock == -1))
3202                                 finished = 1;
3203                 }
3204                 else {
3205                         if (CtdlClientGetLine(LineBuf) < 0) finished = 1;
3206                 }
3207                 if ((StrLength(LineBuf) == tlen) &&
3208                     (!strcmp(ChrPtr(LineBuf), terminator)))
3209                         finished = 1;
3210
3211                 if ( (!flushing) && (!finished) ) {
3212                         if (crlf) {
3213                                 StrBufAppendBufPlain(LineBuf, HKEY("\r\n"), 0);
3214                         }
3215                         else {
3216                                 StrBufAppendBufPlain(LineBuf, HKEY("\n"), 0);
3217                         }
3218
3219                         /* Unescape SMTP-style input of two dots at the beginning of the line */
3220                         if ((dotdot) &&
3221                             (StrLength(LineBuf) == 2) &&
3222                             (!strcmp(ChrPtr(LineBuf), "..")))
3223                         {
3224                                 StrBufCutLeft(LineBuf, 1);
3225                         }
3226
3227                         StrBufAppendBuf(Message, LineBuf, 0);
3228                 }
3229
3230                 /* if we've hit the max msg length, flush the rest */
3231                 if (StrLength(Message) >= maxlen) flushing = 1;
3232
3233         } while (!finished);
3234         FreeStrBuf(&LineBuf);
3235         return Message;
3236 }
3237
3238 void DeleteAsyncMsg(ReadAsyncMsg **Msg)
3239 {
3240         if (*Msg == NULL)
3241                 return;
3242         FreeStrBuf(&(*Msg)->MsgBuf);
3243
3244         free(*Msg);
3245         *Msg = NULL;
3246 }
3247
3248 ReadAsyncMsg *NewAsyncMsg(const char *terminator,       /* token signalling EOT */
3249                           long tlen,
3250                           size_t maxlen,                /* maximum message length */
3251                           size_t expectlen,             /* if we expect a message, how long should it be? */
3252                           StrBuf *exist,                /* if non-null, append to it;
3253                                                            exist is ALWAYS freed  */
3254                           long eLen,                    /* length of exist */
3255                           int crlf                      /* CRLF newlines instead of LF */
3256         )
3257 {
3258         ReadAsyncMsg *NewMsg;
3259
3260         NewMsg = (ReadAsyncMsg *)malloc(sizeof(ReadAsyncMsg));
3261         memset(NewMsg, 0, sizeof(ReadAsyncMsg));
3262
3263         if (exist == NULL) {
3264                 long len;
3265
3266                 if (expectlen == 0) {
3267                         len = 4 * SIZ;
3268                 }
3269                 else {
3270                         len = expectlen + 10;
3271                 }
3272                 NewMsg->MsgBuf = NewStrBufPlain(NULL, len);
3273         }
3274         else {
3275                 NewMsg->MsgBuf = NewStrBufDup(exist);
3276         }
3277         /* Do we need to change leading ".." to "." for SMTP escaping? */
3278         if ((tlen == 1) && (*terminator == '.')) {
3279                 NewMsg->dodot = 1;
3280         }
3281
3282         NewMsg->terminator = terminator;
3283         NewMsg->tlen = tlen;
3284
3285         NewMsg->maxlen = maxlen;
3286
3287         NewMsg->crlf = crlf;
3288
3289         return NewMsg;
3290 }
3291
3292 /*
3293  * Back end function used by CtdlMakeMessage() and similar functions
3294  */
3295 eReadState CtdlReadMessageBodyAsync(AsyncIO *IO)
3296 {
3297         ReadAsyncMsg *ReadMsg;
3298         int MsgFinished = 0;
3299         eReadState Finished = eMustReadMore;
3300
3301 #ifdef BIGBAD_IODBG
3302         char fn [SIZ];
3303         FILE *fd;
3304         const char *pch = ChrPtr(IO->SendBuf.Buf);
3305         const char *pchh = IO->SendBuf.ReadWritePointer;
3306         long nbytes;
3307
3308         if (pchh == NULL)
3309                 pchh = pch;
3310
3311         nbytes = StrLength(IO->SendBuf.Buf) - (pchh - pch);
3312         snprintf(fn, SIZ, "/tmp/foolog_ev_%s.%d",
3313                  ((CitContext*)(IO->CitContext))->ServiceName,
3314                  IO->SendBuf.fd);
3315
3316         fd = fopen(fn, "a+");
3317         if (fd == NULL) {
3318                 syslog(LOG_EMERG, "failed to open file %s: %s", fn, strerror(errno));
3319                 cit_backtrace();
3320                 exit(1);
3321         }
3322 #endif
3323
3324         ReadMsg = IO->ReadMsg;
3325
3326         /* read in the lines of message text one by one */
3327         do {
3328                 Finished = StrBufChunkSipLine(IO->IOBuf, &IO->RecvBuf);
3329
3330                 switch (Finished) {
3331                 case eMustReadMore: /// read new from socket...
3332 #ifdef BIGBAD_IODBG
3333                         if (IO->RecvBuf.ReadWritePointer != NULL) {
3334                                 nbytes = StrLength(IO->RecvBuf.Buf) - (IO->RecvBuf.ReadWritePointer - ChrPtr(IO->RecvBuf.Buf));
3335                                 fprintf(fd, "Read; Line unfinished: %ld Bytes still in buffer [", nbytes);
3336
3337                                 fwrite(IO->RecvBuf.ReadWritePointer, nbytes, 1, fd);
3338
3339                                 fprintf(fd, "]\n");
3340                         } else {
3341                                 fprintf(fd, "BufferEmpty! \n");
3342                         }
3343                         fclose(fd);
3344 #endif
3345                         return Finished;
3346                     break;
3347                 case eBufferNotEmpty: /* shouldn't happen... */
3348                 case eReadSuccess: /// done for now...
3349                     break;
3350                 case eReadFail: /// WHUT?
3351                     ///todo: shut down!
3352                         break;
3353                 }
3354
3355
3356                 if ((StrLength(IO->IOBuf) == ReadMsg->tlen) &&
3357                     (!strcmp(ChrPtr(IO->IOBuf), ReadMsg->terminator))) {
3358                         MsgFinished = 1;
3359 #ifdef BIGBAD_IODBG
3360                         fprintf(fd, "found Terminator; Message Size: %d\n", StrLength(ReadMsg->MsgBuf));
3361 #endif
3362                 }
3363                 else if (!ReadMsg->flushing) {
3364
3365 #ifdef BIGBAD_IODBG
3366                         fprintf(fd, "Read Line: [%d][%s]\n", StrLength(IO->IOBuf), ChrPtr(IO->IOBuf));
3367 #endif
3368
3369                         /* Unescape SMTP-style input of two dots at the beginning of the line */
3370                         if ((ReadMsg->dodot) &&
3371                             (StrLength(IO->IOBuf) == 2) &&  /* TODO: do we just unescape lines with two dots or any line? */
3372                             (!strcmp(ChrPtr(IO->IOBuf), "..")))
3373                         {
3374 #ifdef BIGBAD_IODBG
3375                                 fprintf(fd, "UnEscaped!\n");
3376 #endif
3377                                 StrBufCutLeft(IO->IOBuf, 1);
3378                         }
3379
3380                         if (ReadMsg->crlf) {
3381                                 StrBufAppendBufPlain(IO->IOBuf, HKEY("\r\n"), 0);
3382                         }
3383                         else {
3384                                 StrBufAppendBufPlain(IO->IOBuf, HKEY("\n"), 0);
3385                         }
3386
3387                         StrBufAppendBuf(ReadMsg->MsgBuf, IO->IOBuf, 0);
3388                 }
3389
3390                 /* if we've hit the max msg length, flush the rest */
3391                 if (StrLength(ReadMsg->MsgBuf) >= ReadMsg->maxlen) ReadMsg->flushing = 1;
3392
3393         } while (!MsgFinished);
3394
3395 #ifdef BIGBAD_IODBG
3396         fprintf(fd, "Done with reading; %s.\n, ",
3397                 (MsgFinished)?"Message Finished": "FAILED");
3398         fclose(fd);
3399 #endif
3400         if (MsgFinished)
3401                 return eReadSuccess;
3402         else
3403                 return eReadFail;
3404 }
3405
3406
3407 /*
3408  * Back end function used by CtdlMakeMessage() and similar functions
3409  */
3410 char *CtdlReadMessageBody(char *terminator,     /* token signalling EOT */
3411                           long tlen,
3412                           size_t maxlen,                /* maximum message length */
3413                           StrBuf *exist,                /* if non-null, append to it;
3414                                                    exist is ALWAYS freed  */
3415                           int crlf,             /* CRLF newlines instead of LF */
3416                           int *sock             /* socket handle or 0 for this session's client socket */
3417         )
3418 {
3419         StrBuf *Message;
3420
3421         Message = CtdlReadMessageBodyBuf(terminator,
3422                                          tlen,
3423                                          maxlen,
3424                                          exist,
3425                                          crlf,
3426                                          sock);
3427         if (Message == NULL)
3428                 return NULL;
3429         else
3430                 return SmashStrBuf(&Message);
3431 }
3432
3433 struct CtdlMessage *CtdlMakeMessage(
3434         struct ctdluser *author,        /* author's user structure */
3435         char *recipient,                /* NULL if it's not mail */
3436         char *recp_cc,                  /* NULL if it's not mail */
3437         char *room,                     /* room where it's going */
3438         int type,                       /* see MES_ types in header file */
3439         int format_type,                /* variformat, plain text, MIME... */
3440         char *fake_name,                /* who we're masquerading as */
3441         char *my_email,                 /* which of my email addresses to use (empty is ok) */
3442         char *subject,                  /* Subject (optional) */
3443         char *supplied_euid,            /* ...or NULL if this is irrelevant */
3444         char *preformatted_text,        /* ...or NULL to read text from client */
3445         char *references                /* Thread references */
3446 )
3447 {
3448         return CtdlMakeMessageLen(
3449                 author, /* author's user structure */
3450                 recipient,              /* NULL if it's not mail */
3451                 (recipient)?strlen(recipient) : 0,
3452                 recp_cc,                        /* NULL if it's not mail */
3453                 (recp_cc)?strlen(recp_cc): 0,
3454                 room,                   /* room where it's going */
3455                 (room)?strlen(room): 0,
3456                 type,                   /* see MES_ types in header file */
3457                 format_type,            /* variformat, plain text, MIME... */
3458                 fake_name,              /* who we're masquerading as */
3459                 (fake_name)?strlen(fake_name): 0,
3460                 my_email,                       /* which of my email addresses to use (empty is ok) */
3461                 (my_email)?strlen(my_email): 0,
3462                 subject,                        /* Subject (optional) */
3463                 (subject)?strlen(subject): 0,
3464                 supplied_euid,          /* ...or NULL if this is irrelevant */
3465                 (supplied_euid)?strlen(supplied_euid):0,
3466                 preformatted_text,      /* ...or NULL to read text from client */
3467                 (preformatted_text)?strlen(preformatted_text) : 0,
3468                 references,             /* Thread references */
3469                 (references)?strlen(references):0);
3470
3471 }
3472
3473 /*
3474  * Build a binary message to be saved on disk.
3475  * (NOTE: if you supply 'preformatted_text', the buffer you give it
3476  * will become part of the message.  This means you are no longer
3477  * responsible for managing that memory -- it will be freed along with
3478  * the rest of the fields when CM_Free() is called.)
3479  */
3480
3481 struct CtdlMessage *CtdlMakeMessageLen(
3482         struct ctdluser *author,        /* author's user structure */
3483         char *recipient,                /* NULL if it's not mail */
3484         long rcplen,
3485         char *recp_cc,                  /* NULL if it's not mail */
3486         long cclen,
3487         char *room,                     /* room where it's going */
3488         long roomlen,
3489         int type,                       /* see MES_ types in header file */
3490         int format_type,                /* variformat, plain text, MIME... */
3491         char *fake_name,                /* who we're masquerading as */
3492         long fnlen,
3493         char *my_email,                 /* which of my email addresses to use (empty is ok) */
3494         long myelen,
3495         char *subject,                  /* Subject (optional) */
3496         long subjlen,
3497         char *supplied_euid,            /* ...or NULL if this is irrelevant */
3498         long euidlen,
3499         char *preformatted_text,        /* ...or NULL to read text from client */
3500         long textlen,
3501         char *references,               /* Thread references */
3502         long reflen
3503         )
3504 {
3505         /* Don't confuse the poor folks if it's not routed mail. * /
3506            char dest_node[256] = "";*/
3507         long blen;
3508         char buf[1024];
3509         struct CtdlMessage *msg;
3510         StrBuf *FakeAuthor;
3511         StrBuf *FakeEncAuthor = NULL;
3512
3513         msg = malloc(sizeof(struct CtdlMessage));
3514         memset(msg, 0, sizeof(struct CtdlMessage));
3515         msg->cm_magic = CTDLMESSAGE_MAGIC;
3516         msg->cm_anon_type = type;
3517         msg->cm_format_type = format_type;
3518
3519         if (recipient != NULL) rcplen = striplt(recipient);
3520         if (recp_cc != NULL) cclen = striplt(recp_cc);
3521
3522         /* Path or Return-Path */
3523         if (myelen > 0) {
3524                 CM_SetField(msg, eMessagePath, my_email, myelen);
3525         }
3526         else if (!IsEmptyStr(author->fullname)) {
3527                 CM_SetField(msg, eMessagePath, author->fullname, strlen(author->fullname));
3528         }
3529         convert_spaces_to_underscores(msg->cm_fields[eMessagePath]);
3530
3531         blen = snprintf(buf, sizeof buf, "%ld", (long)time(NULL));
3532         CM_SetField(msg, eTimestamp, buf, blen);
3533
3534         if (fnlen > 0) {
3535                 FakeAuthor = NewStrBufPlain (fake_name, fnlen);
3536         }
3537         else {
3538                 FakeAuthor = NewStrBufPlain (author->fullname, -1);
3539         }
3540         StrBufRFC2047encode(&FakeEncAuthor, FakeAuthor);
3541         CM_SetAsFieldSB(msg, eAuthor, &FakeEncAuthor);
3542         FreeStrBuf(&FakeAuthor);
3543
3544         if (!!IsEmptyStr(CC->room.QRname)) {
3545                 if (CC->room.QRflags & QR_MAILBOX) {            /* room */
3546                         CM_SetField(msg, eOriginalRoom, &CC->room.QRname[11], strlen(&CC->room.QRname[11]));
3547                 }
3548                 else {
3549                         CM_SetField(msg, eOriginalRoom, CC->room.QRname, strlen(CC->room.QRname));
3550                 }
3551         }
3552
3553         CM_SetField(msg, eNodeName, CtdlGetConfigStr("c_nodename"), strlen(CtdlGetConfigStr("c_nodename")));
3554         CM_SetField(msg, eHumanNode, CtdlGetConfigStr("c_humannode"), strlen(CtdlGetConfigStr("c_humannode")));
3555
3556         if (rcplen > 0) {
3557                 CM_SetField(msg, eRecipient, recipient, rcplen);
3558         }
3559         if (cclen > 0) {
3560                 CM_SetField(msg, eCarbonCopY, recp_cc, cclen);
3561         }
3562
3563         if (myelen > 0) {
3564                 CM_SetField(msg, erFc822Addr, my_email, myelen);
3565         }
3566         else if ( (author == &CC->user) && (!IsEmptyStr(CC->cs_inet_email)) ) {
3567                 CM_SetField(msg, erFc822Addr, CC->cs_inet_email, strlen(CC->cs_inet_email));
3568         }
3569
3570         if (subject != NULL) {
3571                 long length;
3572                 length = striplt(subject);
3573                 if (length > 0) {
3574                         long i;
3575                         long IsAscii;
3576                         IsAscii = -1;
3577                         i = 0;
3578                         while ((subject[i] != '\0') &&
3579                                (IsAscii = isascii(subject[i]) != 0 ))
3580                                 i++;
3581                         if (IsAscii != 0)
3582                                 CM_SetField(msg, eMsgSubject, subject, subjlen);
3583                         else /* ok, we've got utf8 in the string. */
3584                         {
3585                                 char *rfc2047Subj;
3586                                 rfc2047Subj = rfc2047encode(subject, length);
3587                                 CM_SetAsField(msg, eMsgSubject, &rfc2047Subj, strlen(rfc2047Subj));
3588                         }
3589
3590                 }
3591         }
3592
3593         if (euidlen > 0) {
3594                 CM_SetField(msg, eExclusiveID, supplied_euid, euidlen);
3595         }
3596
3597         if (reflen > 0) {
3598                 CM_SetField(msg, eWeferences, references, reflen);
3599         }
3600
3601         if (preformatted_text != NULL) {
3602                 CM_SetField(msg, eMesageText, preformatted_text, textlen);
3603         }
3604         else {
3605                 StrBuf *MsgBody;
3606                 MsgBody = CtdlReadMessageBodyBuf(HKEY("000"), CtdlGetConfigLong("c_maxmsglen"), NULL, 0, 0);
3607                 if (MsgBody != NULL) {
3608                         CM_SetAsFieldSB(msg, eMesageText, &MsgBody);
3609                 }
3610         }
3611
3612         return(msg);
3613 }
3614
3615
3616
3617
3618 /*
3619  * API function to delete messages which match a set of criteria
3620  * (returns the actual number of messages deleted)
3621  */
3622 int CtdlDeleteMessages(const char *room_name,           /* which room */
3623                        long *dmsgnums,          /* array of msg numbers to be deleted */
3624                        int num_dmsgnums,        /* number of msgs to be deleted, or 0 for "any" */
3625                        char *content_type       /* or "" for any.  regular expressions expected. */
3626         )
3627 {
3628         struct ctdlroom qrbuf;
3629         struct cdbdata *cdbfr;
3630         long *msglist = NULL;
3631         long *dellist = NULL;
3632         int num_msgs = 0;
3633         int i, j;
3634         int num_deleted = 0;
3635         int delete_this;
3636         struct MetaData smi;
3637         regex_t re;
3638         regmatch_t pm;
3639         int need_to_free_re = 0;
3640
3641         if (content_type) if (!IsEmptyStr(content_type)) {
3642                         regcomp(&re, content_type, 0);
3643                         need_to_free_re = 1;
3644                 }
3645         syslog(LOG_DEBUG, " CtdlDeleteMessages(%s, %d msgs, %s)\n",
3646                    room_name, num_dmsgnums, content_type);
3647
3648         /* get room record, obtaining a lock... */
3649         if (CtdlGetRoomLock(&qrbuf, room_name) != 0) {
3650                 syslog(LOG_ERR, " CtdlDeleteMessages(): Room <%s> not found\n",
3651                            room_name);
3652                 if (need_to_free_re) regfree(&re);
3653                 return (0);     /* room not found */
3654         }
3655         cdbfr = cdb_fetch(CDB_MSGLISTS, &qrbuf.QRnumber, sizeof(long));
3656
3657         if (cdbfr != NULL) {
3658                 dellist = malloc(cdbfr->len);
3659                 msglist = (long *) cdbfr->ptr;
3660                 cdbfr->ptr = NULL;      /* CtdlDeleteMessages() now owns this memory */
3661                 num_msgs = cdbfr->len / sizeof(long);
3662                 cdb_free(cdbfr);
3663         }
3664         if (num_msgs > 0) {
3665                 int have_contenttype = (content_type != NULL) && !IsEmptyStr(content_type);
3666                 int have_delmsgs = (num_dmsgnums == 0) || (dmsgnums == NULL);
3667                 int have_more_del = 1;
3668
3669                 num_msgs = sort_msglist(msglist, num_msgs);
3670                 if (num_dmsgnums > 1)
3671                         num_dmsgnums = sort_msglist(dmsgnums, num_dmsgnums);
3672 /*
3673                 {
3674                         StrBuf *dbg = NewStrBuf();
3675                         for (i = 0; i < num_dmsgnums; i++)
3676                                 StrBufAppendPrintf(dbg, ", %ld", dmsgnums[i]);
3677                         syslog(LOG_DEBUG, " Deleting before: %s", ChrPtr(dbg));
3678                         FreeStrBuf(&dbg);
3679                 }
3680 */
3681                 i = 0; j = 0;
3682                 while ((i < num_msgs) && (have_more_del)) {
3683                         delete_this = 0x00;
3684
3685                         /* Set/clear a bit for each criterion */
3686
3687                         /* 0 messages in the list or a null list means that we are
3688                          * interested in deleting any messages which meet the other criteria.
3689                          */
3690                         if (have_delmsgs) {
3691                                 delete_this |= 0x01;
3692                         }
3693                         else {
3694                                 while ((i < num_msgs) && (msglist[i] < dmsgnums[j])) i++;
3695
3696                                 if (i >= num_msgs)
3697                                         continue;
3698
3699                                 if (msglist[i] == dmsgnums[j]) {
3700                                         delete_this |= 0x01;
3701                                 }
3702                                 j++;
3703                                 have_more_del = (j < num_dmsgnums);
3704                         }
3705
3706                         if (have_contenttype) {
3707                                 GetMetaData(&smi, msglist[i]);
3708                                 if (regexec(&re, smi.meta_content_type, 1, &pm, 0) == 0) {
3709                                         delete_this |= 0x02;
3710                                 }
3711                         } else {
3712                                 delete_this |= 0x02;
3713                         }
3714
3715                         /* Delete message only if all bits are set */
3716                         if (delete_this == 0x03) {
3717                                 dellist[num_deleted++] = msglist[i];
3718                                 msglist[i] = 0L;
3719                         }
3720                         i++;
3721                 }
3722 /*
3723                 {
3724                         StrBuf *dbg = NewStrBuf();
3725                         for (i = 0; i < num_deleted; i++)
3726                                 StrBufAppendPrintf(dbg, ", %ld", dellist[i]);
3727                         syslog(LOG_DEBUG, " Deleting: %s", ChrPtr(dbg));
3728                         FreeStrBuf(&dbg);
3729                 }
3730 */
3731                 num_msgs = sort_msglist(msglist, num_msgs);
3732                 cdb_store(CDB_MSGLISTS, &qrbuf.QRnumber, (int)sizeof(long),
3733                           msglist, (int)(num_msgs * sizeof(long)));
3734
3735                 if (num_msgs > 0)
3736                         qrbuf.QRhighest = msglist[num_msgs - 1];
3737                 else
3738                         qrbuf.QRhighest = 0;
3739         }
3740         CtdlPutRoomLock(&qrbuf);
3741
3742         /* Go through the messages we pulled out of the index, and decrement
3743          * their reference counts by 1.  If this is the only room the message
3744          * was in, the reference count will reach zero and the message will
3745          * automatically be deleted from the database.  We do this in a
3746          * separate pass because there might be plug-in hooks getting called,
3747          * and we don't want that happening during an S_ROOMS critical
3748          * section.
3749          */
3750         if (num_deleted) {
3751                 for (i=0; i<num_deleted; ++i) {
3752                         PerformDeleteHooks(qrbuf.QRname, dellist[i]);
3753                 }
3754                 AdjRefCountList(dellist, num_deleted, -1);
3755         }
3756         /* Now free the memory we used, and go away. */
3757         if (msglist != NULL) free(msglist);
3758         if (dellist != NULL) free(dellist);
3759         syslog(LOG_DEBUG, " %d message(s) deleted.\n", num_deleted);
3760         if (need_to_free_re) regfree(&re);
3761         return (num_deleted);
3762 }
3763
3764
3765
3766
3767 /*
3768  * GetMetaData()  -  Get the supplementary record for a message
3769  */
3770 void GetMetaData(struct MetaData *smibuf, long msgnum)
3771 {
3772
3773         struct cdbdata *cdbsmi;
3774         long TheIndex;
3775
3776         memset(smibuf, 0, sizeof(struct MetaData));
3777         smibuf->meta_msgnum = msgnum;
3778         smibuf->meta_refcount = 1;      /* Default reference count is 1 */
3779
3780         /* Use the negative of the message number for its supp record index */
3781         TheIndex = (0L - msgnum);
3782
3783         cdbsmi = cdb_fetch(CDB_MSGMAIN, &TheIndex, sizeof(long));
3784         if (cdbsmi == NULL) {
3785                 return;         /* record not found; go with defaults */
3786         }
3787         memcpy(smibuf, cdbsmi->ptr,
3788                ((cdbsmi->len > sizeof(struct MetaData)) ?
3789                 sizeof(struct MetaData) : cdbsmi->len));
3790         cdb_free(cdbsmi);
3791         return;
3792 }
3793
3794
3795 /*
3796  * PutMetaData()  -  (re)write supplementary record for a message
3797  */
3798 void PutMetaData(struct MetaData *smibuf)
3799 {
3800         long TheIndex;
3801
3802         /* Use the negative of the message number for the metadata db index */
3803         TheIndex = (0L - smibuf->meta_msgnum);
3804
3805         cdb_store(CDB_MSGMAIN,
3806                   &TheIndex, (int)sizeof(long),
3807                   smibuf, (int)sizeof(struct MetaData));
3808
3809 }
3810
3811 /*
3812  * AdjRefCount  -  submit an adjustment to the reference count for a message.
3813  *                 (These are just queued -- we actually process them later.)
3814  */
3815 void AdjRefCount(long msgnum, int incr)
3816 {
3817         struct arcq new_arcq;
3818         int rv = 0;
3819
3820         syslog(LOG_DEBUG, "AdjRefCount() msg %ld ref count delta %+d\n", msgnum, incr);
3821
3822         begin_critical_section(S_SUPPMSGMAIN);
3823         if (arcfp == NULL) {
3824                 arcfp = fopen(file_arcq, "ab+");
3825                 chown(file_arcq, CTDLUID, (-1));
3826                 chmod(file_arcq, 0600);
3827         }
3828         end_critical_section(S_SUPPMSGMAIN);
3829
3830         /* msgnum < 0 means that we're trying to close the file */
3831         if (msgnum < 0) {
3832                 syslog(LOG_DEBUG, "Closing the AdjRefCount queue file\n");
3833                 begin_critical_section(S_SUPPMSGMAIN);
3834                 if (arcfp != NULL) {
3835                         fclose(arcfp);
3836                         arcfp = NULL;
3837                 }
3838                 end_critical_section(S_SUPPMSGMAIN);
3839                 return;
3840         }
3841
3842         /*
3843          * If we can't open the queue, perform the operation synchronously.
3844          */
3845         if (arcfp == NULL) {
3846                 TDAP_AdjRefCount(msgnum, incr);
3847                 return;
3848         }
3849
3850         new_arcq.arcq_msgnum = msgnum;
3851         new_arcq.arcq_delta = incr;
3852         rv = fwrite(&new_arcq, sizeof(struct arcq), 1, arcfp);
3853         if (rv == -1) {
3854                 syslog(LOG_EMERG, "Couldn't write Refcount Queue File %s: %s\n",
3855                            file_arcq,
3856                            strerror(errno));
3857         }
3858         fflush(arcfp);
3859
3860         return;
3861 }
3862
3863 void AdjRefCountList(long *msgnum, long nmsg, int incr)
3864 {
3865         long i, the_size, offset;
3866         struct arcq *new_arcq;
3867         int rv = 0;
3868
3869         syslog(LOG_DEBUG, "AdjRefCountList() msg %ld ref count delta %+d\n", nmsg, incr);
3870
3871         begin_critical_section(S_SUPPMSGMAIN);
3872         if (arcfp == NULL) {
3873                 arcfp = fopen(file_arcq, "ab+");
3874                 chown(file_arcq, CTDLUID, (-1));
3875                 chmod(file_arcq, 0600);
3876         }
3877         end_critical_section(S_SUPPMSGMAIN);
3878
3879         /*
3880          * If we can't open the queue, perform the operation synchronously.
3881          */
3882         if (arcfp == NULL) {
3883                 for (i = 0; i < nmsg; i++)
3884                         TDAP_AdjRefCount(msgnum[i], incr);
3885                 return;
3886         }
3887
3888         the_size = sizeof(struct arcq) * nmsg;
3889         new_arcq = malloc(the_size);
3890         for (i = 0; i < nmsg; i++) {
3891                 new_arcq[i].arcq_msgnum = msgnum[i];
3892                 new_arcq[i].arcq_delta = incr;
3893         }
3894         rv = 0;
3895         offset = 0;
3896         while ((rv >= 0) && (offset < the_size))
3897         {
3898                 rv = fwrite(new_arcq + offset, 1, the_size - offset, arcfp);
3899                 if (rv == -1) {
3900                         syslog(LOG_EMERG, "Couldn't write Refcount Queue File %s: %s\n",
3901                                    file_arcq,
3902                                    strerror(errno));
3903                 }
3904                 else {
3905                         offset += rv;
3906                 }
3907         }
3908         free(new_arcq);
3909         fflush(arcfp);
3910
3911         return;
3912 }
3913
3914
3915 /*
3916  * TDAP_ProcessAdjRefCountQueue()
3917  *
3918  * Process the queue of message count adjustments that was created by calls
3919  * to AdjRefCount() ... by reading the queue and calling TDAP_AdjRefCount()
3920  * for each one.  This should be an "off hours" operation.
3921  */
3922 int TDAP_ProcessAdjRefCountQueue(void)
3923 {
3924         char file_arcq_temp[PATH_MAX];
3925         int r;
3926         FILE *fp;
3927         struct arcq arcq_rec;
3928         int num_records_processed = 0;
3929
3930         snprintf(file_arcq_temp, sizeof file_arcq_temp, "%s.%04x", file_arcq, rand());
3931
3932         begin_critical_section(S_SUPPMSGMAIN);
3933         if (arcfp != NULL) {
3934                 fclose(arcfp);
3935                 arcfp = NULL;
3936         }
3937
3938         r = link(file_arcq, file_arcq_temp);
3939         if (r != 0) {
3940                 syslog(LOG_CRIT, "%s: %s\n", file_arcq_temp, strerror(errno));
3941                 end_critical_section(S_SUPPMSGMAIN);
3942                 return(num_records_processed);
3943         }
3944
3945         unlink(file_arcq);
3946         end_critical_section(S_SUPPMSGMAIN);
3947
3948         fp = fopen(file_arcq_temp, "rb");
3949         if (fp == NULL) {
3950                 syslog(LOG_CRIT, "%s: %s\n", file_arcq_temp, strerror(errno));
3951                 return(num_records_processed);
3952         }
3953
3954         while (fread(&arcq_rec, sizeof(struct arcq), 1, fp) == 1) {
3955                 TDAP_AdjRefCount(arcq_rec.arcq_msgnum, arcq_rec.arcq_delta);
3956                 ++num_records_processed;
3957         }
3958
3959         fclose(fp);
3960         r = unlink(file_arcq_temp);
3961         if (r != 0) {
3962                 syslog(LOG_CRIT, "%s: %s\n", file_arcq_temp, strerror(errno));
3963         }
3964
3965         return(num_records_processed);
3966 }
3967
3968
3969
3970 /*
3971  * TDAP_AdjRefCount  -  adjust the reference count for a message.
3972  *                      This one does it "for real" because it's called by
3973  *                      the autopurger function that processes the queue
3974  *                      created by AdjRefCount().   If a message's reference
3975  *                      count becomes zero, we also delete the message from
3976  *                      disk and de-index it.
3977  */
3978 void TDAP_AdjRefCount(long msgnum, int incr)
3979 {
3980
3981         struct MetaData smi;
3982         long delnum;
3983
3984         /* This is a *tight* critical section; please keep it that way, as
3985          * it may get called while nested in other critical sections.
3986          * Complicating this any further will surely cause deadlock!
3987          */
3988         begin_critical_section(S_SUPPMSGMAIN);
3989         GetMetaData(&smi, msgnum);
3990         smi.meta_refcount += incr;
3991         PutMetaData(&smi);
3992         end_critical_section(S_SUPPMSGMAIN);
3993         syslog(LOG_DEBUG, "TDAP_AdjRefCount() msg %ld ref count delta %+d, is now %d\n",
3994                    msgnum, incr, smi.meta_refcount
3995                 );
3996
3997         /* If the reference count is now zero, delete the message
3998          * (and its supplementary record as well).
3999          */
4000         if (smi.meta_refcount == 0) {
4001                 syslog(LOG_DEBUG, "Deleting message <%ld>\n", msgnum);
4002
4003                 /* Call delete hooks with NULL room to show it has gone altogether */
4004                 PerformDeleteHooks(NULL, msgnum);
4005
4006                 /* Remove from message base */
4007                 delnum = msgnum;
4008                 cdb_delete(CDB_MSGMAIN, &delnum, (int)sizeof(long));
4009                 cdb_delete(CDB_BIGMSGS, &delnum, (int)sizeof(long));
4010
4011                 /* Remove metadata record */
4012                 delnum = (0L - msgnum);
4013                 cdb_delete(CDB_MSGMAIN, &delnum, (int)sizeof(long));
4014         }
4015
4016 }
4017
4018 /*
4019  * Write a generic object to this room
4020  *
4021  * Note: this could be much more efficient.  Right now we use two temporary
4022  * files, and still pull the message into memory as with all others.
4023  */
4024 void CtdlWriteObject(char *req_room,                    /* Room to stuff it in */
4025                      char *content_type,                /* MIME type of this object */
4026                      char *raw_message,         /* Data to be written */
4027                      off_t raw_length,          /* Size of raw_message */
4028                      struct ctdluser *is_mailbox,       /* Mailbox room? */
4029                      int is_binary,                     /* Is encoding necessary? */
4030                      int is_unique,                     /* Del others of this type? */
4031                      unsigned int flags         /* Internal save flags */
4032         )
4033 {
4034         struct ctdlroom qrbuf;
4035         char roomname[ROOMNAMELEN];
4036         struct CtdlMessage *msg;
4037         StrBuf *encoded_message = NULL;
4038
4039         if (is_mailbox != NULL) {
4040                 CtdlMailboxName(roomname, sizeof roomname, is_mailbox, req_room);
4041         }
4042         else {
4043                 safestrncpy(roomname, req_room, sizeof(roomname));
4044         }
4045
4046         syslog(LOG_DEBUG, "Raw length is %ld\n", (long)raw_length);
4047
4048         if (is_binary) {
4049                 encoded_message = NewStrBufPlain(NULL, (size_t) (((raw_length * 134) / 100) + 4096 ) );
4050         }
4051         else {
4052                 encoded_message = NewStrBufPlain(NULL, (size_t)(raw_length + 4096));
4053         }
4054
4055         StrBufAppendBufPlain(encoded_message, HKEY("Content-type: "), 0);
4056         StrBufAppendBufPlain(encoded_message, content_type, -1, 0);
4057         StrBufAppendBufPlain(encoded_message, HKEY("\n"), 0);
4058
4059         if (is_binary) {
4060                 StrBufAppendBufPlain(encoded_message, HKEY("Content-transfer-encoding: base64\n\n"), 0);
4061         }
4062         else {
4063                 StrBufAppendBufPlain(encoded_message, HKEY("Content-transfer-encoding: 7bit\n\n"), 0);
4064         }
4065
4066         if (is_binary) {
4067                 StrBufBase64Append(encoded_message, NULL, raw_message, raw_length, 0);
4068         }
4069         else {
4070                 StrBufAppendBufPlain(encoded_message, raw_message, raw_length, 0);
4071         }
4072
4073         syslog(LOG_DEBUG, "Allocating\n");
4074         msg = malloc(sizeof(struct CtdlMessage));
4075         memset(msg, 0, sizeof(struct CtdlMessage));
4076         msg->cm_magic = CTDLMESSAGE_MAGIC;
4077         msg->cm_anon_type = MES_NORMAL;
4078         msg->cm_format_type = 4;
4079         CM_SetField(msg, eAuthor, CC->user.fullname, strlen(CC->user.fullname));
4080         CM_SetField(msg, eOriginalRoom, req_room, strlen(req_room));
4081         CM_SetField(msg, eNodeName, CtdlGetConfigStr("c_nodename"), strlen(CtdlGetConfigStr("c_nodename")));
4082         CM_SetField(msg, eHumanNode, CtdlGetConfigStr("c_humannode"), strlen(CtdlGetConfigStr("c_humannode")));
4083         msg->cm_flags = flags;
4084
4085         CM_SetAsFieldSB(msg, eMesageText, &encoded_message);
4086
4087         /* Create the requested room if we have to. */
4088         if (CtdlGetRoom(&qrbuf, roomname) != 0) {
4089                 CtdlCreateRoom(roomname,
4090                                ( (is_mailbox != NULL) ? 5 : 3 ),
4091                                "", 0, 1, 0, VIEW_BBS);
4092         }
4093         /* If the caller specified this object as unique, delete all
4094          * other objects of this type that are currently in the room.
4095          */
4096         if (is_unique) {
4097                 syslog(LOG_DEBUG, "Deleted %d other msgs of this type\n",
4098                            CtdlDeleteMessages(roomname, NULL, 0, content_type)
4099                         );
4100         }
4101         /* Now write the data */
4102         CtdlSubmitMsg(msg, NULL, roomname, 0);
4103         CM_Free(msg);
4104 }
4105
4106
4107
4108 /*****************************************************************************/
4109 /*                      MODULE INITIALIZATION STUFF                          */
4110 /*****************************************************************************/
4111
4112 CTDL_MODULE_INIT(msgbase)
4113 {
4114         if (!threading) {
4115                 FillMsgKeyLookupTable();
4116         }
4117
4118         /* return our Subversion id for the Log */
4119         return "msgbase";
4120 }