citadel/msgbase.c

   1 /*
   2  * $Id$
   3  *
   4  * Implements the message store.
   5  *
   6  */
   7
   8 #include "sysdep.h"
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11 #include <stdio.h>
  12 #include <fcntl.h>
  13
  14 #if TIME_WITH_SYS_TIME
  15 # include <sys/time.h>
  16 # include <time.h>
  17 #else
  18 # if HAVE_SYS_TIME_H
  19 #  include <sys/time.h>
  20 # else
  21 #  include <time.h>
  22 # endif
  23 #endif
  24
  25
  26 #include <ctype.h>
  27 #include <string.h>
  28 #include <limits.h>
  29 #include <errno.h>
  30 #include <stdarg.h>
  31 #include <sys/stat.h>
  32 #include <sys/types.h>
  33 #include <regex.h>
  34 #include <libcitadel.h>
  35 #include "citadel.h"
  36 #include "server.h"
  37 #include "serv_extensions.h"
  38 #include "database.h"
  39 #include "msgbase.h"
  40 #include "support.h"
  41 #include "sysdep_decls.h"
  42 #include "citserver.h"
  43 #include "room_ops.h"
  44 #include "user_ops.h"
  45 #include "file_ops.h"
  46 #include "config.h"
  47 #include "control.h"
  48 #include "genstamp.h"
  49 #include "internet_addressing.h"
  50 #include "euidindex.h"
  51 #include "journaling.h"
  52 #include "citadel_dirs.h"
  53 #include "clientsocket.h"
  54 #include "serv_network.h"
  55 #include "threads.h"
  56
  57 #include "ctdl_module.h"
  58
  59 long config_msgnum;
  60 struct addresses_to_be_filed *atbf = NULL;
  61
  62 /* This temp file holds the queue of operations for AdjRefCount() */
  63 static FILE *arcfp = NULL;
  64
  65 /*
  66  * This really belongs in serv_network.c, but I don't know how to export
  67  * symbols between modules.
  68  */
  69 struct FilterList *filterlist = NULL;
  70
  71
  72 /*
  73  * These are the four-character field headers we use when outputting
  74  * messages in Citadel format (as opposed to RFC822 format).
  75  */
  76 char *msgkeys[] = {
  77         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  78         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  79         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  80         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  81         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  82         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  83         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  84         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  85         NULL,
  86         "from",
  87         NULL, NULL, NULL,
  88         "exti",
  89         "rfca",
  90         NULL,
  91         "hnod",
  92         "msgn",
  93         "jrnl",
  94         NULL,
  95         "list",
  96         "text",
  97         "node",
  98         "room",
  99         "path",
 100         NULL,
 101         "rcpt",
 102         "spec",
 103         "time",
 104         "subj",
 105         NULL,
 106         "wefw",
 107         NULL,
 108         "cccc",
 109         NULL
 110 };
 111
 112 /*
 113  * This function is self explanatory.
 114  * (What can I say, I'm in a weird mood today...)
 115  */
 116 void remove_any_whitespace_to_the_left_or_right_of_at_symbol(char *name)
 117 {
 118         int i;
 119
 120         for (i = 0; i < strlen(name); ++i) {
 121                 if (name[i] == '@') {
 122                         while (isspace(name[i - 1]) && i > 0) {
 123                                 strcpy(&name[i - 1], &name[i]);
 124                                 --i;
 125                         }
 126                         while (isspace(name[i + 1])) {
 127                                 strcpy(&name[i + 1], &name[i + 2]);
 128                         }
 129                 }
 130         }
 131 }
 132
 133
 134 /*
 135  * Aliasing for network mail.
 136  * (Error messages have been commented out, because this is a server.)
 137  */
 138 int alias(char *name)
 139 {                               /* process alias and routing info for mail */
 140         FILE *fp;
 141         int a, i;
 142         char aaa[SIZ], bbb[SIZ];
 143         char *ignetcfg = NULL;
 144         char *ignetmap = NULL;
 145         int at = 0;
 146         char node[64];
 147         char testnode[64];
 148         char buf[SIZ];
 149
 150         char original_name[256];
 151         safestrncpy(original_name, name, sizeof original_name);
 152
 153         striplt(name);
 154         remove_any_whitespace_to_the_left_or_right_of_at_symbol(name);
 155         stripallbut(name, '<', '>');
 156
 157         fp = fopen(file_mail_aliases, "r");
 158         if (fp == NULL) {
 159                 fp = fopen("/dev/null", "r");
 160         }
 161         if (fp == NULL) {
 162                 return (MES_ERROR);
 163         }
 164         strcpy(aaa, "");
 165         strcpy(bbb, "");
 166         while (fgets(aaa, sizeof aaa, fp) != NULL) {
 167                 while (isspace(name[0]))
 168                         strcpy(name, &name[1]);
 169                 aaa[strlen(aaa) - 1] = 0;
 170                 strcpy(bbb, "");
 171                 for (a = 0; a < strlen(aaa); ++a) {
 172                         if (aaa[a] == ',') {
 173                                 strcpy(bbb, &aaa[a + 1]);
 174                                 aaa[a] = 0;
 175                         }
 176                 }
 177                 if (!strcasecmp(name, aaa))
 178                         strcpy(name, bbb);
 179         }
 180         fclose(fp);
 181
 182         /* Hit the Global Address Book */
 183         if (CtdlDirectoryLookup(aaa, name, sizeof aaa) == 0) {
 184                 strcpy(name, aaa);
 185         }
 186
 187         if (strcasecmp(original_name, name)) {
 188                 CtdlLogPrintf(CTDL_INFO, "%s is being forwarded to %s\n", original_name, name);
 189         }
 190
 191         /* Change "user @ xxx" to "user" if xxx is an alias for this host */
 192         for (a=0; a<strlen(name); ++a) {
 193                 if (name[a] == '@') {
 194                         if (CtdlHostAlias(&name[a+1]) == hostalias_localhost) {
 195                                 name[a] = 0;
 196                                 CtdlLogPrintf(CTDL_INFO, "Changed to <%s>\n", name);
 197                         }
 198                 }
 199         }
 200
 201         /* determine local or remote type, see citadel.h */
 202         at = haschar(name, '@');
 203         if (at == 0) return(MES_LOCAL);         /* no @'s - local address */
 204         if (at > 1) return(MES_ERROR);          /* >1 @'s - invalid address */
 205         remove_any_whitespace_to_the_left_or_right_of_at_symbol(name);
 206
 207         /* figure out the delivery mode */
 208         extract_token(node, name, 1, '@', sizeof node);
 209
 210         /* If there are one or more dots in the nodename, we assume that it
 211          * is an FQDN and will attempt SMTP delivery to the Internet.
 212          */
 213         if (haschar(node, '.') > 0) {
 214                 return(MES_INTERNET);
 215         }
 216
 217         /* Otherwise we look in the IGnet maps for a valid Citadel node.
 218          * Try directly-connected nodes first...
 219          */
 220         ignetcfg = CtdlGetSysConfig(IGNETCFG);
 221         for (i=0; i<num_tokens(ignetcfg, '\n'); ++i) {
 222                 extract_token(buf, ignetcfg, i, '\n', sizeof buf);
 223                 extract_token(testnode, buf, 0, '|', sizeof testnode);
 224                 if (!strcasecmp(node, testnode)) {
 225                         free(ignetcfg);
 226                         return(MES_IGNET);
 227                 }
 228         }
 229         free(ignetcfg);
 230
 231         /*
 232          * Then try nodes that are two or more hops away.
 233          */
 234         ignetmap = CtdlGetSysConfig(IGNETMAP);
 235         for (i=0; i<num_tokens(ignetmap, '\n'); ++i) {
 236                 extract_token(buf, ignetmap, i, '\n', sizeof buf);
 237                 extract_token(testnode, buf, 0, '|', sizeof testnode);
 238                 if (!strcasecmp(node, testnode)) {
 239                         free(ignetmap);
 240                         return(MES_IGNET);
 241                 }
 242         }
 243         free(ignetmap);
 244
 245         /* If we get to this point it's an invalid node name */
 246         return (MES_ERROR);
 247 }
 248
 249
 250 /*
 251  * Back end for the MSGS command: output message number only.
 252  */
 253 void simple_listing(long msgnum, void *userdata)
 254 {
 255         cprintf("%ld\n", msgnum);
 256 }
 257
 258
 259
 260 /*
 261  * Back end for the MSGS command: output header summary.
 262  */
 263 void headers_listing(long msgnum, void *userdata)
 264 {
 265         struct CtdlMessage *msg;
 266
 267         msg = CtdlFetchMessage(msgnum, 0);
 268         if (msg == NULL) {
 269                 cprintf("%ld|0|||||\n", msgnum);
 270                 return;
 271         }
 272
 273         cprintf("%ld|%s|%s|%s|%s|%s|\n",
 274                 msgnum,
 275                 (msg->cm_fields['T'] ? msg->cm_fields['T'] : "0"),
 276                 (msg->cm_fields['A'] ? msg->cm_fields['A'] : ""),
 277                 (msg->cm_fields['N'] ? msg->cm_fields['N'] : ""),
 278                 (msg->cm_fields['F'] ? msg->cm_fields['F'] : ""),
 279                 (msg->cm_fields['U'] ? msg->cm_fields['U'] : "")
 280         );
 281         CtdlFreeMessage(msg);
 282 }
 283
 284
 285
 286 /* Determine if a given message matches the fields in a message template.
 287  * Return 0 for a successful match.
 288  */
 289 int CtdlMsgCmp(struct CtdlMessage *msg, struct CtdlMessage *template) {
 290         int i;
 291
 292         /* If there aren't any fields in the template, all messages will
 293          * match.
 294          */
 295         if (template == NULL) return(0);
 296
 297         /* Null messages are bogus. */
 298         if (msg == NULL) return(1);
 299
 300         for (i='A'; i<='Z'; ++i) {
 301                 if (template->cm_fields[i] != NULL) {
 302                         if (msg->cm_fields[i] == NULL) {
 303                                 /* Considered equal if temmplate is empty string */
 304                                 if (IsEmptyStr(template->cm_fields[i])) continue;
 305                                 return 1;
 306                         }
 307                         if (strcasecmp(msg->cm_fields[i],
 308                                 template->cm_fields[i])) return 1;
 309                 }
 310         }
 311
 312         /* All compares succeeded: we have a match! */
 313         return 0;
 314 }
 315
 316
 317
 318 /*
 319  * Retrieve the "seen" message list for the current room.
 320  */
 321 void CtdlGetSeen(char *buf, int which_set) {
 322         struct visit vbuf;
 323
 324         /* Learn about the user and room in question */
 325         CtdlGetRelationship(&vbuf, &CC->user, &CC->room);
 326
 327         if (which_set == ctdlsetseen_seen)
 328                 safestrncpy(buf, vbuf.v_seen, SIZ);
 329         if (which_set == ctdlsetseen_answered)
 330                 safestrncpy(buf, vbuf.v_answered, SIZ);
 331 }
 332
 333
 334
 335 /*
 336  * Manipulate the "seen msgs" string (or other message set strings)
 337  */
 338 void CtdlSetSeen(long *target_msgnums, int num_target_msgnums,
 339                 int target_setting, int which_set,
 340                 struct ctdluser *which_user, struct ctdlroom *which_room) {
 341         struct cdbdata *cdbfr;
 342         int i, k;
 343         int is_seen = 0;
 344         int was_seen = 0;
 345         long lo = (-1L);
 346         long hi = (-1L);
 347         struct visit vbuf;
 348         long *msglist;
 349         int num_msgs = 0;
 350         StrBuf *vset;
 351         StrBuf *setstr;
 352         StrBuf *lostr;
 353         StrBuf *histr;
 354         const char *pvset;
 355         char *is_set;   /* actually an array of booleans */
 356
 357         /* Don't bother doing *anything* if we were passed a list of zero messages */
 358         if (num_target_msgnums < 1) {
 359                 return;
 360         }
 361
 362         /* If no room was specified, we go with the current room. */
 363         if (!which_room) {
 364                 which_room = &CC->room;
 365         }
 366
 367         /* If no user was specified, we go with the current user. */
 368         if (!which_user) {
 369                 which_user = &CC->user;
 370         }
 371
 372         CtdlLogPrintf(CTDL_DEBUG, "CtdlSetSeen(%d msgs starting with %ld, %s, %d) in <%s>\n",
 373                 num_target_msgnums, target_msgnums[0],
 374                 (target_setting ? "SET" : "CLEAR"),
 375                 which_set,
 376                 which_room->QRname);
 377
 378         /* Learn about the user and room in question */
 379         CtdlGetRelationship(&vbuf, which_user, which_room);
 380
 381         /* Load the message list */
 382         cdbfr = cdb_fetch(CDB_MSGLISTS, &which_room->QRnumber, sizeof(long));
 383         if (cdbfr != NULL) {
 384                 msglist = (long *) cdbfr->ptr;
 385                 cdbfr->ptr = NULL;      /* CtdlSetSeen() now owns this memory */
 386                 num_msgs = cdbfr->len / sizeof(long);
 387                 cdb_free(cdbfr);
 388         } else {
 389                 return; /* No messages at all?  No further action. */
 390         }
 391
 392         is_set = malloc(num_msgs * sizeof(char));
 393         memset(is_set, 0, (num_msgs * sizeof(char)) );
 394
 395         /* Decide which message set we're manipulating */
 396         switch(which_set) {
 397         case ctdlsetseen_seen:
 398                 vset = NewStrBufPlain(vbuf.v_seen, -1);
 399                 break;
 400         case ctdlsetseen_answered:
 401                 vset = NewStrBufPlain(vbuf.v_answered, -1);
 402                 break;
 403         default:
 404                 vset = NewStrBuf();
 405         }
 406
 407
 408 #if 0   /* This is a special diagnostic section.  Do not allow it to run during normal operation. */
 409         CtdlLogPrintf(CTDL_DEBUG, "There are %d messages in the room.\n", num_msgs);
 410         for (i=0; i<num_msgs; ++i) {
 411                 if ((i > 0) && (msglist[i] <= msglist[i-1])) abort();
 412         }
 413         CtdlLogPrintf(CTDL_DEBUG, "We are twiddling %d of them.\n", num_target_msgnums);
 414         for (k=0; k<num_target_msgnums; ++k) {
 415                 if ((k > 0) && (target_msgnums[k] <= target_msgnums[k-1])) abort();
 416         }
 417 #endif
 418
 419         CtdlLogPrintf(CTDL_DEBUG, "before update: %s\n", ChrPtr(vset));
 420
 421         /* Translate the existing sequence set into an array of booleans */
 422         setstr = NewStrBuf();
 423         lostr = NewStrBuf();
 424         histr = NewStrBuf();
 425         pvset = NULL;
 426         while (StrBufExtract_NextToken(setstr, vset, &pvset, ',') >= 0) {
 427
 428                 StrBufExtract_token(lostr, setstr, 0, ':');
 429                 if (StrBufNum_tokens(setstr, ':') >= 2) {
 430                         StrBufExtract_token(histr, setstr, 1, ':');
 431                 }
 432                 else {
 433                         FlushStrBuf(histr);
 434                         StrBufAppendBuf(histr, lostr, 0);
 435                 }
 436                 lo = StrTol(lostr);
 437                 if (!strcmp(ChrPtr(histr), "*")) {
 438                         hi = LONG_MAX;
 439                 }
 440                 else {
 441                         hi = StrTol(histr);
 442                 }
 443
 444                 for (i = 0; i < num_msgs; ++i) {
 445                         if ((msglist[i] >= lo) && (msglist[i] <= hi)) {
 446                                 is_set[i] = 1;
 447                         }
 448                 }
 449         }
 450         FreeStrBuf(&setstr);
 451         FreeStrBuf(&lostr);
 452         FreeStrBuf(&histr);
 453
 454
 455         /* Now translate the array of booleans back into a sequence set */
 456         FlushStrBuf(vset);
 457         was_seen = 0;
 458         lo = (-1);
 459         hi = (-1);
 460
 461         for (i=0; i<num_msgs; ++i) {
 462                 is_seen = is_set[i];
 463
 464                 /* Apply changes */
 465                 for (k=0; k<num_target_msgnums; ++k) {
 466                         if (msglist[i] == target_msgnums[k]) {
 467                                 is_seen = target_setting;
 468                         }
 469                 }
 470
 471                 if ((was_seen == 0) && (is_seen == 1)) {
 472                         lo = msglist[i];
 473                 }
 474                 else if ((was_seen == 1) && (is_seen == 0)) {
 475                         hi = msglist[i-1];
 476
 477                         if (StrLength(vset) > 0) {
 478                                 StrBufAppendBufPlain(vset, HKEY(","), 0);
 479                         }
 480                         if (lo == hi) {
 481                                 StrBufAppendPrintf(vset, "%ld", hi);
 482                         }
 483                         else {
 484                                 StrBufAppendPrintf(vset, "%ld:%ld", lo, hi);
 485                         }
 486                 }
 487
 488                 if ((is_seen) && (i == num_msgs - 1)) {
 489                         if (StrLength(vset) > 0) {
 490                                 StrBufAppendBufPlain(vset, HKEY(","), 0);
 491                         }
 492                         if ((i==0) || (was_seen == 0)) {
 493                                 StrBufAppendPrintf(vset, "%ld", msglist[i]);
 494                         }
 495                         else {
 496                                 StrBufAppendPrintf(vset, "%ld:%ld", lo, msglist[i]);
 497                         }
 498                 }
 499
 500                 was_seen = is_seen;
 501         }
 502
 503         /*
 504          * We will have to stuff this string back into a 4096 byte buffer, so if it's
 505          * larger than that now, truncate it by removing tokens from the beginning.
 506          * The limit of 100 iterations is there to prevent an infinite loop in case
 507          * something unexpected happens.
 508          */
 509         int number_of_truncations = 0;
 510         while ( (StrLength(vset) > SIZ) && (number_of_truncations < 100) ) {
 511                 StrBufRemove_token(vset, 0, ',');
 512                 ++number_of_truncations;
 513         }
 514
 515         /*
 516          * If we're truncating the sequence set of messages marked with the 'seen' flag,
 517          * we want the earliest messages (the truncated ones) to be marked, not unmarked.
 518          * Otherwise messages at the beginning will suddenly appear to be 'unseen'.
 519          */
 520         if ( (which_set == ctdlsetseen_seen) && (number_of_truncations > 0) ) {
 521                 StrBuf *first_tok;
 522                 first_tok = NewStrBuf();
 523                 StrBufExtract_token(first_tok, vset, 0, ',');
 524                 StrBufRemove_token(vset, 0, ',');
 525
 526                 if (StrBufNum_tokens(first_tok, ':') > 1) {
 527                         StrBufRemove_token(first_tok, 0, ':');
 528                 }
 529
 530                 StrBuf *new_set;
 531                 new_set = NewStrBuf();
 532                 StrBufAppendBufPlain(new_set, HKEY("1:"), 0);
 533                 StrBufAppendBuf(new_set, first_tok, 0);
 534                 StrBufAppendBufPlain(new_set, HKEY(":"), 0);
 535                 StrBufAppendBuf(new_set, vset, 0);
 536
 537                 FreeStrBuf(&vset);
 538                 FreeStrBuf(&first_tok);
 539                 vset = new_set;
 540         }
 541
 542         CtdlLogPrintf(CTDL_DEBUG, " after update: %s\n", ChrPtr(vset));
 543
 544         /* Decide which message set we're manipulating */
 545         switch (which_set) {
 546                 case ctdlsetseen_seen:
 547                         safestrncpy(vbuf.v_seen, ChrPtr(vset), sizeof vbuf.v_seen);
 548                         break;
 549                 case ctdlsetseen_answered:
 550                         safestrncpy(vbuf.v_answered, ChrPtr(vset), sizeof vbuf.v_answered);
 551                         break;
 552         }
 553
 554         free(is_set);
 555         free(msglist);
 556         CtdlSetRelationship(&vbuf, which_user, which_room);
 557         FreeStrBuf(&vset);
 558 }
 559
 560
 561 /*
 562  * API function to perform an operation for each qualifying message in the
 563  * current room.  (Returns the number of messages processed.)
 564  */
 565 int CtdlForEachMessage(int mode, long ref, char *search_string,
 566                         char *content_type,
 567                         struct CtdlMessage *compare,
 568                         void (*CallBack) (long, void *),
 569                         void *userdata)
 570 {
 571
 572         int a, i, j;
 573         struct visit vbuf;
 574         struct cdbdata *cdbfr;
 575         long *msglist = NULL;
 576         int num_msgs = 0;
 577         int num_processed = 0;
 578         long thismsg;
 579         struct MetaData smi;
 580         struct CtdlMessage *msg = NULL;
 581         int is_seen = 0;
 582         long lastold = 0L;
 583         int printed_lastold = 0;
 584         int num_search_msgs = 0;
 585         long *search_msgs = NULL;
 586         regex_t re;
 587         int need_to_free_re = 0;
 588         regmatch_t pm;
 589
 590         if ((content_type) && (!IsEmptyStr(content_type))) {
 591                 regcomp(&re, content_type, 0);
 592                 need_to_free_re = 1;
 593         }
 594
 595         /* Learn about the user and room in question */
 596         getuser(&CC->user, CC->curr_user);
 597         CtdlGetRelationship(&vbuf, &CC->user, &CC->room);
 598
 599         /* Load the message list */
 600         cdbfr = cdb_fetch(CDB_MSGLISTS, &CC->room.QRnumber, sizeof(long));
 601         if (cdbfr != NULL) {
 602                 msglist = (long *) cdbfr->ptr;
 603                 num_msgs = cdbfr->len / sizeof(long);
 604         } else {
 605                 if (need_to_free_re) regfree(&re);
 606                 return 0;       /* No messages at all?  No further action. */
 607         }
 608
 609
 610         /*
 611          * Now begin the traversal.
 612          */
 613         if (num_msgs > 0) for (a = 0; a < num_msgs; ++a) {
 614
 615                 /* If the caller is looking for a specific MIME type, filter
 616                  * out all messages which are not of the type requested.
 617                  */
 618                 if ((content_type != NULL) && (!IsEmptyStr(content_type))) {
 619
 620                         /* This call to GetMetaData() sits inside this loop
 621                          * so that we only do the extra database read per msg
 622                          * if we need to.  Doing the extra read all the time
 623                          * really kills the server.  If we ever need to use
 624                          * metadata for another search criterion, we need to
 625                          * move the read somewhere else -- but still be smart
 626                          * enough to only do the read if the caller has
 627                          * specified something that will need it.
 628                          */
 629                         GetMetaData(&smi, msglist[a]);
 630
 631                         /* if (strcasecmp(smi.meta_content_type, content_type)) { old non-regex way */
 632                         if (regexec(&re, smi.meta_content_type, 1, &pm, 0) != 0) {
 633                                 msglist[a] = 0L;
 634                         }
 635                 }
 636         }
 637
 638         num_msgs = sort_msglist(msglist, num_msgs);
 639
 640         /* If a template was supplied, filter out the messages which
 641          * don't match.  (This could induce some delays!)
 642          */
 643         if (num_msgs > 0) {
 644                 if (compare != NULL) {
 645                         for (a = 0; a < num_msgs; ++a) {
 646                                 msg = CtdlFetchMessage(msglist[a], 1);
 647                                 if (msg != NULL) {
 648                                         if (CtdlMsgCmp(msg, compare)) {
 649                                                 msglist[a] = 0L;
 650                                         }
 651                                         CtdlFreeMessage(msg);
 652                                 }
 653                         }
 654                 }
 655         }
 656
 657         /* If a search string was specified, get a message list from
 658          * the full text index and remove messages which aren't on both
 659          * lists.
 660          *
 661          * How this works:
 662          * Since the lists are sorted and strictly ascending, and the
 663          * output list is guaranteed to be shorter than or equal to the
 664          * input list, we overwrite the bottom of the input list.  This
 665          * eliminates the need to memmove big chunks of the list over and
 666          * over again.
 667          */
 668         if ( (num_msgs > 0) && (mode == MSGS_SEARCH) && (search_string) ) {
 669
 670                 /* Call search module via hook mechanism.
 671                  * NULL means use any search function available.
 672                  * otherwise replace with a char * to name of search routine
 673                  */
 674                 CtdlModuleDoSearch(&num_search_msgs, &search_msgs, search_string, "fulltext");
 675
 676                 if (num_search_msgs > 0) {
 677
 678                         int orig_num_msgs;
 679
 680                         orig_num_msgs = num_msgs;
 681                         num_msgs = 0;
 682                         for (i=0; i<orig_num_msgs; ++i) {
 683                                 for (j=0; j<num_search_msgs; ++j) {
 684                                         if (msglist[i] == search_msgs[j]) {
 685                                                 msglist[num_msgs++] = msglist[i];
 686                                         }
 687                                 }
 688                         }
 689                 }
 690                 else {
 691                         num_msgs = 0;   /* No messages qualify */
 692                 }
 693                 if (search_msgs != NULL) free(search_msgs);
 694
 695                 /* Now that we've purged messages which don't contain the search
 696                  * string, treat a MSGS_SEARCH just like a MSGS_ALL from this
 697                  * point on.
 698                  */
 699                 mode = MSGS_ALL;
 700         }
 701
 702         /*
 703          * Now iterate through the message list, according to the
 704          * criteria supplied by the caller.
 705          */
 706         if (num_msgs > 0)
 707                 for (a = 0; a < num_msgs; ++a) {
 708                         thismsg = msglist[a];
 709                         if (mode == MSGS_ALL) {
 710                                 is_seen = 0;
 711                         }
 712                         else {
 713                                 is_seen = is_msg_in_sequence_set(
 714                                                         vbuf.v_seen, thismsg);
 715                                 if (is_seen) lastold = thismsg;
 716                         }
 717                         if ((thismsg > 0L)
 718                             && (
 719
 720                                        (mode == MSGS_ALL)
 721                                        || ((mode == MSGS_OLD) && (is_seen))
 722                                        || ((mode == MSGS_NEW) && (!is_seen))
 723                                        || ((mode == MSGS_LAST) && (a >= (num_msgs - ref)))
 724                                    || ((mode == MSGS_FIRST) && (a < ref))
 725                                 || ((mode == MSGS_GT) && (thismsg > ref))
 726                                 || ((mode == MSGS_EQ) && (thismsg == ref))
 727                             )
 728                             ) {
 729                                 if ((mode == MSGS_NEW) && (CC->user.flags & US_LASTOLD) && (lastold > 0L) && (printed_lastold == 0) && (!is_seen)) {
 730                                         if (CallBack)
 731                                                 CallBack(lastold, userdata);
 732                                         printed_lastold = 1;
 733                                         ++num_processed;
 734                                 }
 735                                 if (CallBack) CallBack(thismsg, userdata);
 736                                 ++num_processed;
 737                         }
 738                 }
 739         cdb_free(cdbfr);        /* Clean up */
 740         if (need_to_free_re) regfree(&re);
 741         return num_processed;
 742 }
 743
 744
 745
 746 /*
 747  * cmd_msgs()  -  get list of message #'s in this room
 748  *              implements the MSGS server command using CtdlForEachMessage()
 749  */
 750 void cmd_msgs(char *cmdbuf)
 751 {
 752         int mode = 0;
 753         char which[16];
 754         char buf[256];
 755         char tfield[256];
 756         char tvalue[256];
 757         int cm_ref = 0;
 758         int i;
 759         int with_template = 0;
 760         struct CtdlMessage *template = NULL;
 761         int with_headers = 0;
 762         char search_string[1024];
 763
 764         extract_token(which, cmdbuf, 0, '|', sizeof which);
 765         cm_ref = extract_int(cmdbuf, 1);
 766         extract_token(search_string, cmdbuf, 1, '|', sizeof search_string);
 767         with_template = extract_int(cmdbuf, 2);
 768         with_headers = extract_int(cmdbuf, 3);
 769
 770         strcat(which, "   ");
 771         if (!strncasecmp(which, "OLD", 3))
 772                 mode = MSGS_OLD;
 773         else if (!strncasecmp(which, "NEW", 3))
 774                 mode = MSGS_NEW;
 775         else if (!strncasecmp(which, "FIRST", 5))
 776                 mode = MSGS_FIRST;
 777         else if (!strncasecmp(which, "LAST", 4))
 778                 mode = MSGS_LAST;
 779         else if (!strncasecmp(which, "GT", 2))
 780                 mode = MSGS_GT;
 781         else if (!strncasecmp(which, "SEARCH", 6))
 782                 mode = MSGS_SEARCH;
 783         else
 784                 mode = MSGS_ALL;
 785
 786         if ((!(CC->logged_in)) && (!(CC->internal_pgm))) {
 787                 cprintf("%d not logged in\n", ERROR + NOT_LOGGED_IN);
 788                 return;
 789         }
 790
 791         if ( (mode == MSGS_SEARCH) && (!config.c_enable_fulltext) ) {
 792                 cprintf("%d Full text index is not enabled on this server.\n",
 793                         ERROR + CMD_NOT_SUPPORTED);
 794                 return;
 795         }
 796
 797         if (with_template) {
 798                 unbuffer_output();
 799                 cprintf("%d Send template then receive message list\n",
 800                         START_CHAT_MODE);
 801                 template = (struct CtdlMessage *)
 802                         malloc(sizeof(struct CtdlMessage));
 803                 memset(template, 0, sizeof(struct CtdlMessage));
 804                 template->cm_magic = CTDLMESSAGE_MAGIC;
 805                 template->cm_anon_type = MES_NORMAL;
 806
 807                 while(client_getln(buf, sizeof buf) >= 0 && strcmp(buf,"000")) {
 808                         extract_token(tfield, buf, 0, '|', sizeof tfield);
 809                         extract_token(tvalue, buf, 1, '|', sizeof tvalue);
 810                         for (i='A'; i<='Z'; ++i) if (msgkeys[i]!=NULL) {
 811                                 if (!strcasecmp(tfield, msgkeys[i])) {
 812                                         template->cm_fields[i] =
 813                                                 strdup(tvalue);
 814                                 }
 815                         }
 816                 }
 817                 buffer_output();
 818         }
 819         else {
 820                 cprintf("%d  \n", LISTING_FOLLOWS);
 821         }
 822
 823         CtdlForEachMessage(mode,
 824                         ( (mode == MSGS_SEARCH) ? 0 : cm_ref ),
 825                         ( (mode == MSGS_SEARCH) ? search_string : NULL ),
 826                         NULL,
 827                         template,
 828                         (with_headers ? headers_listing : simple_listing),
 829                         NULL
 830         );
 831         if (template != NULL) CtdlFreeMessage(template);
 832         cprintf("000\n");
 833 }
 834
 835
 836
 837
 838 /*
 839  * help_subst()  -  support routine for help file viewer
 840  */
 841 void help_subst(char *strbuf, char *source, char *dest)
 842 {
 843         char workbuf[SIZ];
 844         int p;
 845
 846         while (p = pattern2(strbuf, source), (p >= 0)) {
 847                 strcpy(workbuf, &strbuf[p + strlen(source)]);
 848                 strcpy(&strbuf[p], dest);
 849                 strcat(strbuf, workbuf);
 850         }
 851 }
 852
 853
 854 void do_help_subst(char *buffer)
 855 {
 856         char buf2[16];
 857
 858         help_subst(buffer, "^nodename", config.c_nodename);
 859         help_subst(buffer, "^humannode", config.c_humannode);
 860         help_subst(buffer, "^fqdn", config.c_fqdn);
 861         help_subst(buffer, "^username", CC->user.fullname);
 862         snprintf(buf2, sizeof buf2, "%ld", CC->user.usernum);
 863         help_subst(buffer, "^usernum", buf2);
 864         help_subst(buffer, "^sysadm", config.c_sysadm);
 865         help_subst(buffer, "^variantname", CITADEL);
 866         snprintf(buf2, sizeof buf2, "%d", config.c_maxsessions);
 867         help_subst(buffer, "^maxsessions", buf2);
 868         help_subst(buffer, "^bbsdir", ctdl_message_dir);
 869 }
 870
 871
 872
 873 /*
 874  * memfmout()  -  Citadel text formatter and paginator.
 875  *           Although the original purpose of this routine was to format
 876  *           text to the reader's screen width, all we're really using it
 877  *           for here is to format text out to 80 columns before sending it
 878  *           to the client.  The client software may reformat it again.
 879  */
 880 void memfmout(
 881         char *mptr,             /* where are we going to get our text from? */
 882         char subst,             /* nonzero if we should do substitutions */
 883         char *nl)               /* string to terminate lines with */
 884 {
 885         int a, b, c;
 886         int real = 0;
 887         int old = 0;
 888         cit_uint8_t ch;
 889         char aaa[140];
 890         char buffer[SIZ];
 891         static int width = 80;
 892
 893         strcpy(aaa, "");
 894         old = 255;
 895         strcpy(buffer, "");
 896         c = 1;                  /* c is the current pos */
 897
 898         do {
 899                 if (subst) {
 900                         while (ch = *mptr, ((ch != 0) && (strlen(buffer) < 126))) {
 901                                 ch = *mptr++;
 902                                 buffer[strlen(buffer) + 1] = 0;
 903                                 buffer[strlen(buffer)] = ch;
 904                         }
 905
 906                         if (buffer[0] == '^')
 907                                 do_help_subst(buffer);
 908
 909                         buffer[strlen(buffer) + 1] = 0;
 910                         a = buffer[0];
 911                         strcpy(buffer, &buffer[1]);
 912                 } else {
 913                         ch = *mptr++;
 914                 }
 915
 916                 old = real;
 917                 real = ch;
 918
 919                 if (((ch == 13) || (ch == 10)) && (old != 13) && (old != 10)) {
 920                         ch = 32;
 921                 }
 922                 if (((old == 13) || (old == 10)) && (isspace(real))) {
 923                         cprintf("%s", nl);
 924                         c = 1;
 925                 }
 926                 if (ch > 32) {
 927                         if (((strlen(aaa) + c) > (width - 5)) && (strlen(aaa) > (width - 5))) {
 928                                 cprintf("%s%s", nl, aaa);
 929                                 c = strlen(aaa);
 930                                 aaa[0] = 0;
 931                         }
 932                         b = strlen(aaa);
 933                         aaa[b] = ch;
 934                         aaa[b + 1] = 0;
 935                 }
 936                 if (ch == 32) {
 937                         if ((strlen(aaa) + c) > (width - 5)) {
 938                                 cprintf("%s", nl);
 939                                 c = 1;
 940                         }
 941                         cprintf("%s ", aaa);
 942                         ++c;
 943                         c = c + strlen(aaa);
 944                         strcpy(aaa, "");
 945                 }
 946                 if ((ch == 13) || (ch == 10)) {
 947                         cprintf("%s%s", aaa, nl);
 948                         c = 1;
 949                         strcpy(aaa, "");
 950                 }
 951
 952         } while (ch > 0);
 953
 954         cprintf("%s%s", aaa, nl);
 955 }
 956
 957
 958
 959 /*
 960  * Callback function for mime parser that simply lists the part
 961  */
 962 void list_this_part(char *name, char *filename, char *partnum, char *disp,
 963                     void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
 964                     char *cbid, void *cbuserdata)
 965 {
 966         struct ma_info *ma;
 967
 968         ma = (struct ma_info *)cbuserdata;
 969         if (ma->is_ma == 0) {
 970                 cprintf("part=%s|%s|%s|%s|%s|%ld|%s\n",
 971                         name, filename, partnum, disp, cbtype, (long)length, cbid);
 972         }
 973 }
 974
 975 /*
 976  * Callback function for multipart prefix
 977  */
 978 void list_this_pref(char *name, char *filename, char *partnum, char *disp,
 979                     void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
 980                     char *cbid, void *cbuserdata)
 981 {
 982         struct ma_info *ma;
 983
 984         ma = (struct ma_info *)cbuserdata;
 985         if (!strcasecmp(cbtype, "multipart/alternative")) {
 986                 ++ma->is_ma;
 987         }
 988
 989         if (ma->is_ma == 0) {
 990                 cprintf("pref=%s|%s\n", partnum, cbtype);
 991         }
 992 }
 993
 994 /*
 995  * Callback function for multipart sufffix
 996  */
 997 void list_this_suff(char *name, char *filename, char *partnum, char *disp,
 998                     void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
 999                     char *cbid, void *cbuserdata)
1000 {
1001         struct ma_info *ma;
1002
1003         ma = (struct ma_info *)cbuserdata;
1004         if (ma->is_ma == 0) {
1005                 cprintf("suff=%s|%s\n", partnum, cbtype);
1006         }
1007         if (!strcasecmp(cbtype, "multipart/alternative")) {
1008                 --ma->is_ma;
1009         }
1010 }
1011
1012
1013 /*
1014  * Callback function for mime parser that opens a section for downloading
1015  */
1016 void mime_download(char *name, char *filename, char *partnum, char *disp,
1017                    void *content, char *cbtype, char *cbcharset, size_t length,
1018                    char *encoding, char *cbid, void *cbuserdata)
1019 {
1020         int rv = 0;
1021
1022         /* Silently go away if there's already a download open. */
1023         if (CC->download_fp != NULL)
1024                 return;
1025
1026         if (
1027                 (!IsEmptyStr(partnum) && (!strcasecmp(CC->download_desired_section, partnum)))
1028         ||      (!IsEmptyStr(cbid) && (!strcasecmp(CC->download_desired_section, cbid)))
1029         ) {
1030                 CC->download_fp = tmpfile();
1031                 if (CC->download_fp == NULL)
1032                         return;
1033
1034                 rv = fwrite(content, length, 1, CC->download_fp);
1035                 fflush(CC->download_fp);
1036                 rewind(CC->download_fp);
1037
1038                 OpenCmdResult(filename, cbtype);
1039         }
1040 }
1041
1042
1043
1044 /*
1045  * Callback function for mime parser that outputs a section all at once.
1046  * We can specify the desired section by part number *or* content-id.
1047  */
1048 void mime_spew_section(char *name, char *filename, char *partnum, char *disp,
1049                    void *content, char *cbtype, char *cbcharset, size_t length,
1050                    char *encoding, char *cbid, void *cbuserdata)
1051 {
1052         int *found_it = (int *)cbuserdata;
1053
1054         if (
1055                 (!IsEmptyStr(partnum) && (!strcasecmp(CC->download_desired_section, partnum)))
1056         ||      (!IsEmptyStr(cbid) && (!strcasecmp(CC->download_desired_section, cbid)))
1057         ) {
1058                 *found_it = 1;
1059                 cprintf("%d %d|-1|%s|%s\n",
1060                         BINARY_FOLLOWS,
1061                         (int)length,
1062                         filename,
1063                         cbtype
1064                 );
1065                 client_write(content, length);
1066         }
1067 }
1068
1069
1070
1071 /*
1072  * Load a message from disk into memory.
1073  * This is used by CtdlOutputMsg() and other fetch functions.
1074  *
1075  * NOTE: Caller is responsible for freeing the returned CtdlMessage struct
1076  *       using the CtdlMessageFree() function.
1077  */
1078 struct CtdlMessage *CtdlFetchMessage(long msgnum, int with_body)
1079 {
1080         struct cdbdata *dmsgtext;
1081         struct CtdlMessage *ret = NULL;
1082         char *mptr;
1083         char *upper_bound;
1084         cit_uint8_t ch;
1085         cit_uint8_t field_header;
1086
1087         CtdlLogPrintf(CTDL_DEBUG, "CtdlFetchMessage(%ld, %d)\n", msgnum, with_body);
1088
1089         dmsgtext = cdb_fetch(CDB_MSGMAIN, &msgnum, sizeof(long));
1090         if (dmsgtext == NULL) {
1091                 return NULL;
1092         }
1093         mptr = dmsgtext->ptr;
1094         upper_bound = mptr + dmsgtext->len;
1095
1096         /* Parse the three bytes that begin EVERY message on disk.
1097          * The first is always 0xFF, the on-disk magic number.
1098          * The second is the anonymous/public type byte.
1099          * The third is the format type byte (vari, fixed, or MIME).
1100          */
1101         ch = *mptr++;
1102         if (ch != 255) {
1103                 CtdlLogPrintf(CTDL_ERR, "Message %ld appears to be corrupted.\n", msgnum);
1104                 cdb_free(dmsgtext);
1105                 return NULL;
1106         }
1107         ret = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
1108         memset(ret, 0, sizeof(struct CtdlMessage));
1109
1110         ret->cm_magic = CTDLMESSAGE_MAGIC;
1111         ret->cm_anon_type = *mptr++;    /* Anon type byte */
1112         ret->cm_format_type = *mptr++;  /* Format type byte */
1113
1114         /*
1115          * The rest is zero or more arbitrary fields.  Load them in.
1116          * We're done when we encounter either a zero-length field or
1117          * have just processed the 'M' (message text) field.
1118          */
1119         do {
1120                 if (mptr >= upper_bound) {
1121                         break;
1122                 }
1123                 field_header = *mptr++;
1124                 ret->cm_fields[field_header] = strdup(mptr);
1125
1126                 while (*mptr++ != 0);   /* advance to next field */
1127
1128         } while ((mptr < upper_bound) && (field_header != 'M'));
1129
1130         cdb_free(dmsgtext);
1131
1132         /* Always make sure there's something in the msg text field.  If
1133          * it's NULL, the message text is most likely stored separately,
1134          * so go ahead and fetch that.  Failing that, just set a dummy
1135          * body so other code doesn't barf.
1136          */
1137         if ( (ret->cm_fields['M'] == NULL) && (with_body) ) {
1138                 dmsgtext = cdb_fetch(CDB_BIGMSGS, &msgnum, sizeof(long));
1139                 if (dmsgtext != NULL) {
1140                         ret->cm_fields['M'] = strdup(dmsgtext->ptr);
1141                         cdb_free(dmsgtext);
1142                 }
1143         }
1144         if (ret->cm_fields['M'] == NULL) {
1145                 ret->cm_fields['M'] = strdup("\r\n\r\n (no text)\r\n");
1146         }
1147
1148         /* Perform "before read" hooks (aborting if any return nonzero) */
1149         if (PerformMessageHooks(ret, EVT_BEFOREREAD) > 0) {
1150                 CtdlFreeMessage(ret);
1151                 return NULL;
1152         }
1153
1154         return (ret);
1155 }
1156
1157
1158 /*
1159  * Returns 1 if the supplied pointer points to a valid Citadel message.
1160  * If the pointer is NULL or the magic number check fails, returns 0.
1161  */
1162 int is_valid_message(struct CtdlMessage *msg) {
1163         if (msg == NULL)
1164                 return 0;
1165         if ((msg->cm_magic) != CTDLMESSAGE_MAGIC) {
1166                 CtdlLogPrintf(CTDL_WARNING, "is_valid_message() -- self-check failed\n");
1167                 return 0;
1168         }
1169         return 1;
1170 }
1171
1172
1173 /*
1174  * 'Destructor' for struct CtdlMessage
1175  */
1176 void CtdlFreeMessage(struct CtdlMessage *msg)
1177 {
1178         int i;
1179
1180         if (is_valid_message(msg) == 0)
1181         {
1182                 if (msg != NULL) free (msg);
1183                 return;
1184         }
1185
1186         for (i = 0; i < 256; ++i)
1187                 if (msg->cm_fields[i] != NULL) {
1188                         free(msg->cm_fields[i]);
1189                 }
1190
1191         msg->cm_magic = 0;      /* just in case */
1192         free(msg);
1193 }
1194
1195
1196 /*
1197  * Pre callback function for multipart/alternative
1198  *
1199  * NOTE: this differs from the standard behavior for a reason.  Normally when
1200  *       displaying multipart/alternative you want to show the _last_ usable
1201  *       format in the message.  Here we show the _first_ one, because it's
1202  *       usually text/plain.  Since this set of functions is designed for text
1203  *       output to non-MIME-aware clients, this is the desired behavior.
1204  *
1205  */
1206 void fixed_output_pre(char *name, char *filename, char *partnum, char *disp,
1207                 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
1208                 char *cbid, void *cbuserdata)
1209 {
1210         struct ma_info *ma;
1211
1212         ma = (struct ma_info *)cbuserdata;
1213         CtdlLogPrintf(CTDL_DEBUG, "fixed_output_pre() type=<%s>\n", cbtype);
1214         if (!strcasecmp(cbtype, "multipart/alternative")) {
1215                 ++ma->is_ma;
1216                 ma->did_print = 0;
1217         }
1218         if (!strcasecmp(cbtype, "message/rfc822")) {
1219                 ++ma->freeze;
1220         }
1221 }
1222
1223 /*
1224  * Post callback function for multipart/alternative
1225  */
1226 void fixed_output_post(char *name, char *filename, char *partnum, char *disp,
1227                 void *content, char *cbtype, char *cbcharset, size_t length,
1228                 char *encoding, char *cbid, void *cbuserdata)
1229 {
1230         struct ma_info *ma;
1231
1232         ma = (struct ma_info *)cbuserdata;
1233         CtdlLogPrintf(CTDL_DEBUG, "fixed_output_post() type=<%s>\n", cbtype);
1234         if (!strcasecmp(cbtype, "multipart/alternative")) {
1235                 --ma->is_ma;
1236                 ma->did_print = 0;
1237         }
1238         if (!strcasecmp(cbtype, "message/rfc822")) {
1239                 --ma->freeze;
1240         }
1241 }
1242
1243 /*
1244  * Inline callback function for mime parser that wants to display text
1245  */
1246 void fixed_output(char *name, char *filename, char *partnum, char *disp,
1247                 void *content, char *cbtype, char *cbcharset, size_t length,
1248                 char *encoding, char *cbid, void *cbuserdata)
1249 {
1250         char *ptr;
1251         char *wptr;
1252         size_t wlen;
1253         struct ma_info *ma;
1254
1255         ma = (struct ma_info *)cbuserdata;
1256
1257         CtdlLogPrintf(CTDL_DEBUG,
1258                 "fixed_output() part %s: %s (%s) (%ld bytes)\n",
1259                 partnum, filename, cbtype, (long)length);
1260
1261         /*
1262          * If we're in the middle of a multipart/alternative scope and
1263          * we've already printed another section, skip this one.
1264          */
1265         if ( (ma->is_ma) && (ma->did_print) ) {
1266                 CtdlLogPrintf(CTDL_DEBUG, "Skipping part %s (%s)\n", partnum, cbtype);
1267                 return;
1268         }
1269         ma->did_print = 1;
1270
1271         if ( (!strcasecmp(cbtype, "text/plain"))
1272            || (IsEmptyStr(cbtype)) ) {
1273                 wptr = content;
1274                 if (length > 0) {
1275                         client_write(wptr, length);
1276                         if (wptr[length-1] != '\n') {
1277                                 cprintf("\n");
1278                         }
1279                 }
1280                 return;
1281         }
1282
1283         if (!strcasecmp(cbtype, "text/html")) {
1284                 ptr = html_to_ascii(content, length, 80, 0);
1285                 wlen = strlen(ptr);
1286                 client_write(ptr, wlen);
1287                 if (ptr[wlen-1] != '\n') {
1288                         cprintf("\n");
1289                 }
1290                 free(ptr);
1291                 return;
1292         }
1293
1294         if (ma->use_fo_hooks) {
1295                 if (PerformFixedOutputHooks(cbtype, content, length)) {
1296                 /* above function returns nonzero if it handled the part */
1297                         return;
1298                 }
1299         }
1300
1301         if (strncasecmp(cbtype, "multipart/", 10)) {
1302                 cprintf("Part %s: %s (%s) (%ld bytes)\r\n",
1303                         partnum, filename, cbtype, (long)length);
1304                 return;
1305         }
1306 }
1307
1308 /*
1309  * The client is elegant and sophisticated and wants to be choosy about
1310  * MIME content types, so figure out which multipart/alternative part
1311  * we're going to send.
1312  *
1313  * We use a system of weights.  When we find a part that matches one of the
1314  * MIME types we've declared as preferential, we can store it in ma->chosen_part
1315  * and then set ma->chosen_pref to that MIME type's position in our preference
1316  * list.  If we then hit another match, we only replace the first match if
1317  * the preference value is lower.
1318  */
1319 void choose_preferred(char *name, char *filename, char *partnum, char *disp,
1320                 void *content, char *cbtype, char *cbcharset, size_t length,
1321                 char *encoding, char *cbid, void *cbuserdata)
1322 {
1323         char buf[1024];
1324         int i;
1325         struct ma_info *ma;
1326
1327         ma = (struct ma_info *)cbuserdata;
1328
1329         // NOTE: REMOVING THIS CONDITIONAL FIXES BUG 220
1330         //       http://bugzilla.citadel.org/show_bug.cgi?id=220
1331         // I don't know if there are any side effects!  Please TEST TEST TEST
1332         //if (ma->is_ma > 0) {
1333
1334         for (i=0; i<num_tokens(CC->preferred_formats, '|'); ++i) {
1335                 extract_token(buf, CC->preferred_formats, i, '|', sizeof buf);
1336                 if ( (!strcasecmp(buf, cbtype)) && (!ma->freeze) ) {
1337                         if (i < ma->chosen_pref) {
1338                                 CtdlLogPrintf(CTDL_DEBUG, "Setting chosen part: <%s>\n", partnum);
1339                                 safestrncpy(ma->chosen_part, partnum, sizeof ma->chosen_part);
1340                                 ma->chosen_pref = i;
1341                         }
1342                 }
1343         }
1344 }
1345
1346 /*
1347  * Now that we've chosen our preferred part, output it.
1348  */
1349 void output_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         int i;
1354         char buf[128];
1355         int add_newline = 0;
1356         char *text_content;
1357         struct ma_info *ma;
1358
1359         ma = (struct ma_info *)cbuserdata;
1360
1361         /* This is not the MIME part you're looking for... */
1362         if (strcasecmp(partnum, ma->chosen_part)) return;
1363
1364         /* If the content-type of this part is in our preferred formats
1365          * list, we can simply output it verbatim.
1366          */
1367         for (i=0; i<num_tokens(CC->preferred_formats, '|'); ++i) {
1368                 extract_token(buf, CC->preferred_formats, i, '|', sizeof buf);
1369                 if (!strcasecmp(buf, cbtype)) {
1370                         /* Yeah!  Go!  W00t!! */
1371
1372                         text_content = (char *)content;
1373                         if (text_content[length-1] != '\n') {
1374                                 ++add_newline;
1375                         }
1376                         cprintf("Content-type: %s", cbtype);
1377                         if (!IsEmptyStr(cbcharset)) {
1378                                 cprintf("; charset=%s", cbcharset);
1379                         }
1380                         cprintf("\nContent-length: %d\n",
1381                                 (int)(length + add_newline) );
1382                         if (!IsEmptyStr(encoding)) {
1383                                 cprintf("Content-transfer-encoding: %s\n", encoding);
1384                         }
1385                         else {
1386                                 cprintf("Content-transfer-encoding: 7bit\n");
1387                         }
1388                         cprintf("X-Citadel-MSG4-Partnum: %s\n", partnum);
1389                         cprintf("\n");
1390                         client_write(content, length);
1391                         if (add_newline) cprintf("\n");
1392                         return;
1393                 }
1394         }
1395
1396         /* No translations required or possible: output as text/plain */
1397         cprintf("Content-type: text/plain\n\n");
1398         fixed_output(name, filename, partnum, disp, content, cbtype, cbcharset,
1399                         length, encoding, cbid, cbuserdata);
1400 }
1401
1402
1403 struct encapmsg {
1404         char desired_section[64];
1405         char *msg;
1406         size_t msglen;
1407 };
1408
1409
1410 /*
1411  * Callback function for
1412  */
1413 void extract_encapsulated_message(char *name, char *filename, char *partnum, char *disp,
1414                    void *content, char *cbtype, char *cbcharset, size_t length,
1415                    char *encoding, char *cbid, void *cbuserdata)
1416 {
1417         struct encapmsg *encap;
1418
1419         encap = (struct encapmsg *)cbuserdata;
1420
1421         /* Only proceed if this is the desired section... */
1422         if (!strcasecmp(encap->desired_section, partnum)) {
1423                 encap->msglen = length;
1424                 encap->msg = malloc(length + 2);
1425                 memcpy(encap->msg, content, length);
1426                 return;
1427         }
1428
1429 }
1430
1431
1432
1433
1434
1435
1436 int CtdlDoIHavePermissionToReadMessagesInThisRoom(void) {
1437         if ((!(CC->logged_in)) && (!(CC->internal_pgm))) {
1438                 return(om_not_logged_in);
1439         }
1440         return(om_ok);
1441 }
1442
1443
1444 /*
1445  * Get a message off disk.  (returns om_* values found in msgbase.h)
1446  *
1447  */
1448 int CtdlOutputMsg(long msg_num,         /* message number (local) to fetch */
1449                   int mode,             /* how would you like that message? */
1450                   int headers_only,     /* eschew the message body? */
1451                   int do_proto,         /* do Citadel protocol responses? */
1452                   int crlf,             /* Use CRLF newlines instead of LF? */
1453                   char *section,        /* NULL or a message/rfc822 section */
1454                   int flags             /* various flags; see msgbase.h */
1455 ) {
1456         struct CtdlMessage *TheMessage = NULL;
1457         int retcode = om_no_such_msg;
1458         struct encapmsg encap;
1459         int r;
1460
1461         CtdlLogPrintf(CTDL_DEBUG, "CtdlOutputMsg(msgnum=%ld, mode=%d, section=%s)\n",
1462                 msg_num, mode,
1463                 (section ? section : "<>")
1464         );
1465
1466         r = CtdlDoIHavePermissionToReadMessagesInThisRoom();
1467         if (r != om_ok) {
1468                 if (do_proto) {
1469                         if (r == om_not_logged_in) {
1470                                 cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
1471                         }
1472                         else {
1473                                 cprintf("%d An unknown error has occurred.\n", ERROR);
1474                         }
1475                 }
1476                 return(r);
1477         }
1478
1479         /* FIXME: check message id against msglist for this room */
1480
1481         /*
1482          * Fetch the message from disk.  If we're in HEADERS_FAST mode,
1483          * request that we don't even bother loading the body into memory.
1484          */
1485         if (headers_only == HEADERS_FAST) {
1486                 TheMessage = CtdlFetchMessage(msg_num, 0);
1487         }
1488         else {
1489                 TheMessage = CtdlFetchMessage(msg_num, 1);
1490         }
1491
1492         if (TheMessage == NULL) {
1493                 if (do_proto) cprintf("%d Can't locate msg %ld on disk\n",
1494                         ERROR + MESSAGE_NOT_FOUND, msg_num);
1495                 return(om_no_such_msg);
1496         }
1497
1498         /* Here is the weird form of this command, to process only an
1499          * encapsulated message/rfc822 section.
1500          */
1501         if (section) if (!IsEmptyStr(section)) if (strcmp(section, "0")) {
1502                 memset(&encap, 0, sizeof encap);
1503                 safestrncpy(encap.desired_section, section, sizeof encap.desired_section);
1504                 mime_parser(TheMessage->cm_fields['M'],
1505                         NULL,
1506                         *extract_encapsulated_message,
1507                         NULL, NULL, (void *)&encap, 0
1508                 );
1509                 CtdlFreeMessage(TheMessage);
1510                 TheMessage = NULL;
1511
1512                 if (encap.msg) {
1513                         encap.msg[encap.msglen] = 0;
1514                         TheMessage = convert_internet_message(encap.msg);
1515                         encap.msg = NULL;       /* no free() here, TheMessage owns it now */
1516
1517                         /* Now we let it fall through to the bottom of this
1518                          * function, because TheMessage now contains the
1519                          * encapsulated message instead of the top-level
1520                          * message.  Isn't that neat?
1521                          */
1522
1523                 }
1524                 else {
1525                         if (do_proto) cprintf("%d msg %ld has no part %s\n",
1526                                 ERROR + MESSAGE_NOT_FOUND, msg_num, section);
1527                         retcode = om_no_such_msg;
1528                 }
1529
1530         }
1531
1532         /* Ok, output the message now */
1533         retcode = CtdlOutputPreLoadedMsg(TheMessage, mode, headers_only, do_proto, crlf, flags);
1534         CtdlFreeMessage(TheMessage);
1535
1536         return(retcode);
1537 }
1538
1539
1540 char *qp_encode_email_addrs(char *source)
1541 {
1542         char user[256], node[256], name[256];
1543         const char headerStr[] = "=?UTF-8?Q?";
1544         char *Encoded;
1545         char *EncodedName;
1546         char *nPtr;
1547         int need_to_encode = 0;
1548         long SourceLen;
1549         long EncodedMaxLen;
1550         long nColons = 0;
1551         long *AddrPtr;
1552         long *AddrUtf8;
1553         long nAddrPtrMax = 50;
1554         long nmax;
1555         int InQuotes = 0;
1556         int i, n;
1557
1558         if (source == NULL) return source;
1559         if (IsEmptyStr(source)) return source;
1560
1561         AddrPtr = malloc (sizeof (long) * nAddrPtrMax);
1562         AddrUtf8 = malloc (sizeof (long) * nAddrPtrMax);
1563         memset(AddrUtf8, 0, sizeof (long) * nAddrPtrMax);
1564         *AddrPtr = 0;
1565         i = 0;
1566         while (!IsEmptyStr (&source[i])) {
1567                 if (nColons >= nAddrPtrMax){
1568                         long *ptr;
1569
1570                         ptr = (long *) malloc(sizeof (long) * nAddrPtrMax * 2);
1571                         memcpy (ptr, AddrPtr, sizeof (long) * nAddrPtrMax);
1572                         free (AddrPtr), AddrPtr = ptr;
1573
1574                         ptr = (long *) malloc(sizeof (long) * nAddrPtrMax * 2);
1575                         memset(&ptr[nAddrPtrMax], 0,
1576                                sizeof (long) * nAddrPtrMax);
1577
1578                         memcpy (ptr, AddrUtf8, sizeof (long) * nAddrPtrMax);
1579                         free (AddrUtf8), AddrUtf8 = ptr;
1580                         nAddrPtrMax *= 2;
1581                 }
1582                 if (((unsigned char) source[i] < 32) ||
1583                     ((unsigned char) source[i] > 126)) {
1584                         need_to_encode = 1;
1585                         AddrUtf8[nColons] = 1;
1586                 }
1587                 if (source[i] == '"')
1588                         InQuotes = !InQuotes;
1589                 if (!InQuotes && source[i] == ',') {
1590                         AddrPtr[nColons] = i;
1591                         nColons++;
1592                 }
1593                 i++;
1594         }
1595         if (need_to_encode == 0) {
1596                 free(AddrPtr);
1597                 free(AddrUtf8);
1598                 return source;
1599         }
1600
1601         SourceLen = i;
1602         EncodedMaxLen = nColons * (sizeof(headerStr) + 3) + SourceLen * 3;
1603         Encoded = (char*) malloc (EncodedMaxLen);
1604
1605         for (i = 0; i < nColons; i++)
1606                 source[AddrPtr[i]++] = '\0';
1607
1608         nPtr = Encoded;
1609         *nPtr = '\0';
1610         for (i = 0; i < nColons && nPtr != NULL; i++) {
1611                 nmax = EncodedMaxLen - (nPtr - Encoded);
1612                 if (AddrUtf8[i]) {
1613                         process_rfc822_addr(&source[AddrPtr[i]],
1614                                             user,
1615                                             node,
1616                                             name);
1617                         /* TODO: libIDN here ! */
1618                         if (IsEmptyStr(name)) {
1619                                 n = snprintf(nPtr, nmax,
1620                                              (i==0)?"%s@%s" : ",%s@%s",
1621                                              user, node);
1622                         }
1623                         else {
1624                                 EncodedName = rfc2047encode(name, strlen(name));
1625                                 n = snprintf(nPtr, nmax,
1626                                              (i==0)?"%s <%s@%s>" : ",%s <%s@%s>",
1627                                              EncodedName, user, node);
1628                                 free(EncodedName);
1629                         }
1630                 }
1631                 else {
1632                         n = snprintf(nPtr, nmax,
1633                                      (i==0)?"%s" : ",%s",
1634                                      &source[AddrPtr[i]]);
1635                 }
1636                 if (n > 0 )
1637                         nPtr += n;
1638                 else {
1639                         char *ptr, *nnPtr;
1640                         ptr = (char*) malloc(EncodedMaxLen * 2);
1641                         memcpy(ptr, Encoded, EncodedMaxLen);
1642                         nnPtr = ptr + (nPtr - Encoded), nPtr = nnPtr;
1643                         free(Encoded), Encoded = ptr;
1644                         EncodedMaxLen *= 2;
1645                         i--; /* do it once more with properly lengthened buffer */
1646                 }
1647         }
1648         for (i = 0; i < nColons; i++)
1649                 source[--AddrPtr[i]] = ',';
1650         free(AddrUtf8);
1651         free(AddrPtr);
1652         return Encoded;
1653 }
1654
1655
1656 /* If the last item in a list of recipients was truncated to a partial address,
1657  * remove it completely in order to avoid choking libSieve
1658  */
1659 void sanitize_truncated_recipient(char *str)
1660 {
1661         if (!str) return;
1662         if (num_tokens(str, ',') < 2) return;
1663
1664         int len = strlen(str);
1665         if (len < 900) return;
1666         if (len > 998) str[998] = 0;
1667
1668         char *cptr = strrchr(str, ',');
1669         if (!cptr) return;
1670
1671         char *lptr = strchr(cptr, '<');
1672         char *rptr = strchr(cptr, '>');
1673
1674         if ( (lptr) && (rptr) && (rptr > lptr) ) return;
1675
1676         *cptr = 0;
1677 }
1678
1679
1680
1681 /*
1682  * Get a message off disk.  (returns om_* values found in msgbase.h)
1683  */
1684 int CtdlOutputPreLoadedMsg(
1685                 struct CtdlMessage *TheMessage,
1686                 int mode,               /* how would you like that message? */
1687                 int headers_only,       /* eschew the message body? */
1688                 int do_proto,           /* do Citadel protocol responses? */
1689                 int crlf,               /* Use CRLF newlines instead of LF? */
1690                 int flags               /* should the bessage be exported clean? */
1691 ) {
1692         int i, j, k;
1693         char buf[SIZ];
1694         cit_uint8_t ch, prev_ch;
1695         char allkeys[30];
1696         char display_name[256];
1697         char *mptr, *mpptr;
1698         char *nl;       /* newline string */
1699         int suppress_f = 0;
1700         int subject_found = 0;
1701         struct ma_info ma;
1702
1703         /* Buffers needed for RFC822 translation.  These are all filled
1704          * using functions that are bounds-checked, and therefore we can
1705          * make them substantially smaller than SIZ.
1706          */
1707         char suser[100];
1708         char luser[100];
1709         char fuser[100];
1710         char snode[100];
1711         char mid[100];
1712         char datestamp[100];
1713
1714         CtdlLogPrintf(CTDL_DEBUG, "CtdlOutputPreLoadedMsg(TheMessage=%s, %d, %d, %d, %d\n",
1715                 ((TheMessage == NULL) ? "NULL" : "not null"),
1716                 mode, headers_only, do_proto, crlf);
1717
1718         strcpy(mid, "unknown");
1719         nl = (crlf ? "\r\n" : "\n");
1720
1721         if (!is_valid_message(TheMessage)) {
1722                 CtdlLogPrintf(CTDL_ERR,
1723                         "ERROR: invalid preloaded message for output\n");
1724                 cit_backtrace ();
1725                 return(om_no_such_msg);
1726         }
1727
1728         /* Suppress envelope recipients if required to avoid disclosing BCC addresses.
1729          * Pad it with spaces in order to avoid changing the RFC822 length of the message.
1730          */
1731         if ( (flags & SUPPRESS_ENV_TO) && (TheMessage->cm_fields['V'] != NULL) ) {
1732                 memset(TheMessage->cm_fields['V'], ' ', strlen(TheMessage->cm_fields['V']));
1733         }
1734
1735         /* Are we downloading a MIME component? */
1736         if (mode == MT_DOWNLOAD) {
1737                 if (TheMessage->cm_format_type != FMT_RFC822) {
1738                         if (do_proto)
1739                                 cprintf("%d This is not a MIME message.\n",
1740                                 ERROR + ILLEGAL_VALUE);
1741                 } else if (CC->download_fp != NULL) {
1742                         if (do_proto) cprintf(
1743                                 "%d You already have a download open.\n",
1744                                 ERROR + RESOURCE_BUSY);
1745                 } else {
1746                         /* Parse the message text component */
1747                         mptr = TheMessage->cm_fields['M'];
1748                         mime_parser(mptr, NULL, *mime_download, NULL, NULL, NULL, 0);
1749                         /* If there's no file open by this time, the requested
1750                          * section wasn't found, so print an error
1751                          */
1752                         if (CC->download_fp == NULL) {
1753                                 if (do_proto) cprintf(
1754                                         "%d Section %s not found.\n",
1755                                         ERROR + FILE_NOT_FOUND,
1756                                         CC->download_desired_section);
1757                         }
1758                 }
1759                 return((CC->download_fp != NULL) ? om_ok : om_mime_error);
1760         }
1761
1762         /* MT_SPEW_SECTION is like MT_DOWNLOAD except it outputs the whole MIME part
1763          * in a single server operation instead of opening a download file.
1764          */
1765         if (mode == MT_SPEW_SECTION) {
1766                 if (TheMessage->cm_format_type != FMT_RFC822) {
1767                         if (do_proto)
1768                                 cprintf("%d This is not a MIME message.\n",
1769                                 ERROR + ILLEGAL_VALUE);
1770                 } else {
1771                         /* Parse the message text component */
1772                         int found_it = 0;
1773
1774                         mptr = TheMessage->cm_fields['M'];
1775                         mime_parser(mptr, NULL, *mime_spew_section, NULL, NULL, (void *)&found_it, 0);
1776                         /* If section wasn't found, print an error
1777                          */
1778                         if (!found_it) {
1779                                 if (do_proto) cprintf(
1780                                         "%d Section %s not found.\n",
1781                                         ERROR + FILE_NOT_FOUND,
1782                                         CC->download_desired_section);
1783                         }
1784                 }
1785                 return((CC->download_fp != NULL) ? om_ok : om_mime_error);
1786         }
1787
1788         /* now for the user-mode message reading loops */
1789         if (do_proto) cprintf("%d msg:\n", LISTING_FOLLOWS);
1790
1791         /* Does the caller want to skip the headers? */
1792         if (headers_only == HEADERS_NONE) goto START_TEXT;
1793
1794         /* Tell the client which format type we're using. */
1795         if ( (mode == MT_CITADEL) && (do_proto) ) {
1796                 cprintf("type=%d\n", TheMessage->cm_format_type);
1797         }
1798
1799         /* nhdr=yes means that we're only displaying headers, no body */
1800         if ( (TheMessage->cm_anon_type == MES_ANONONLY)
1801            && ((mode == MT_CITADEL) || (mode == MT_MIME))
1802            && (do_proto)
1803            ) {
1804                 cprintf("nhdr=yes\n");
1805         }
1806
1807         /* begin header processing loop for Citadel message format */
1808
1809         if ((mode == MT_CITADEL) || (mode == MT_MIME)) {
1810
1811                 safestrncpy(display_name, "<unknown>", sizeof display_name);
1812                 if (TheMessage->cm_fields['A']) {
1813                         strcpy(buf, TheMessage->cm_fields['A']);
1814                         if (TheMessage->cm_anon_type == MES_ANONONLY) {
1815                                 safestrncpy(display_name, "****", sizeof display_name);
1816                         }
1817                         else if (TheMessage->cm_anon_type == MES_ANONOPT) {
1818                                 safestrncpy(display_name, "anonymous", sizeof display_name);
1819                         }
1820                         else {
1821                                 safestrncpy(display_name, buf, sizeof display_name);
1822                         }
1823                         if ((is_room_aide())
1824                             && ((TheMessage->cm_anon_type == MES_ANONONLY)
1825                              || (TheMessage->cm_anon_type == MES_ANONOPT))) {
1826                                 size_t tmp = strlen(display_name);
1827                                 snprintf(&display_name[tmp],
1828                                          sizeof display_name - tmp,
1829                                          " [%s]", buf);
1830                         }
1831                 }
1832
1833                 /* Don't show Internet address for users on the
1834                  * local Citadel network.
1835                  */
1836                 suppress_f = 0;
1837                 if (TheMessage->cm_fields['N'] != NULL)
1838                    if (!IsEmptyStr(TheMessage->cm_fields['N']))
1839                       if (haschar(TheMessage->cm_fields['N'], '.') == 0) {
1840                         suppress_f = 1;
1841                 }
1842
1843                 /* Now spew the header fields in the order we like them. */
1844                 safestrncpy(allkeys, FORDER, sizeof allkeys);
1845                 for (i=0; i<strlen(allkeys); ++i) {
1846                         k = (int) allkeys[i];
1847                         if (k != 'M') {
1848                                 if ( (TheMessage->cm_fields[k] != NULL)
1849                                    && (msgkeys[k] != NULL) ) {
1850                                         if ((k == 'V') || (k == 'R') || (k == 'Y')) {
1851                                                 sanitize_truncated_recipient(TheMessage->cm_fields[k]);
1852                                         }
1853                                         if (k == 'A') {
1854                                                 if (do_proto) cprintf("%s=%s\n",
1855                                                         msgkeys[k],
1856                                                         display_name);
1857                                         }
1858                                         else if ((k == 'F') && (suppress_f)) {
1859                                                 /* do nothing */
1860                                         }
1861                                         /* Masquerade display name if needed */
1862                                         else {
1863                                                 if (do_proto) cprintf("%s=%s\n",
1864                                                         msgkeys[k],
1865                                                         TheMessage->cm_fields[k]
1866                                         );
1867                                         }
1868                                 }
1869                         }
1870                 }
1871
1872         }
1873
1874         /* begin header processing loop for RFC822 transfer format */
1875
1876         strcpy(suser, "");
1877         strcpy(luser, "");
1878         strcpy(fuser, "");
1879         strcpy(snode, NODENAME);
1880         if (mode == MT_RFC822) {
1881                 for (i = 0; i < 256; ++i) {
1882                         if (TheMessage->cm_fields[i]) {
1883                                 mptr = mpptr = TheMessage->cm_fields[i];
1884
1885                                 if (i == 'A') {
1886                                         safestrncpy(luser, mptr, sizeof luser);
1887                                         safestrncpy(suser, mptr, sizeof suser);
1888                                 }
1889                                 else if (i == 'Y') {
1890                                         if ((flags & QP_EADDR) != 0) {
1891                                                 mptr = qp_encode_email_addrs(mptr);
1892                                         }
1893                                         sanitize_truncated_recipient(mptr);
1894                                         cprintf("CC: %s%s", mptr, nl);
1895                                 }
1896                                 else if (i == 'P') {
1897                                         cprintf("Return-Path: %s%s", mptr, nl);
1898                                 }
1899                                 else if (i == 'L') {
1900                                         cprintf("List-ID: %s%s", mptr, nl);
1901                                 }
1902                                 else if (i == 'V') {
1903                                         if ((flags & QP_EADDR) != 0)
1904                                                 mptr = qp_encode_email_addrs(mptr);
1905                                         cprintf("Envelope-To: %s%s", mptr, nl);
1906                                 }
1907                                 else if (i == 'U') {
1908                                         cprintf("Subject: %s%s", mptr, nl);
1909                                         subject_found = 1;
1910                                 }
1911                                 else if (i == 'I')
1912                                         safestrncpy(mid, mptr, sizeof mid);
1913                                 else if (i == 'F')
1914                                         safestrncpy(fuser, mptr, sizeof fuser);
1915                                 /* else if (i == 'O')
1916                                         cprintf("X-Citadel-Room: %s%s",
1917                                                 mptr, nl); */
1918                                 else if (i == 'N')
1919                                         safestrncpy(snode, mptr, sizeof snode);
1920                                 else if (i == 'R')
1921                                 {
1922                                         if (haschar(mptr, '@') == 0)
1923                                         {
1924                                                 sanitize_truncated_recipient(mptr);
1925                                                 cprintf("To: %s@%s", mptr, config.c_fqdn);
1926                                                 cprintf("%s", nl);
1927                                         }
1928                                         else
1929                                         {
1930                                                 if ((flags & QP_EADDR) != 0) {
1931                                                         mptr = qp_encode_email_addrs(mptr);
1932                                                 }
1933                                                 sanitize_truncated_recipient(mptr);
1934                                                 cprintf("To: %s", mptr);
1935                                                 cprintf("%s", nl);
1936                                         }
1937                                 }
1938                                 else if (i == 'T') {
1939                                         datestring(datestamp, sizeof datestamp,
1940                                                 atol(mptr), DATESTRING_RFC822);
1941                                         cprintf("Date: %s%s", datestamp, nl);
1942                                 }
1943                                 else if (i == 'W') {
1944                                         cprintf("References: ");
1945                                         k = num_tokens(mptr, '|');
1946                                         for (j=0; j<k; ++j) {
1947                                                 extract_token(buf, mptr, j, '|', sizeof buf);
1948                                                 cprintf("<%s>", buf);
1949                                                 if (j == (k-1)) {
1950                                                         cprintf("%s", nl);
1951                                                 }
1952                                                 else {
1953                                                         cprintf(" ");
1954                                                 }
1955                                         }
1956                                 }
1957                                 if (mptr != mpptr)
1958                                         free (mptr);
1959                         }
1960                 }
1961                 if (subject_found == 0) {
1962                         cprintf("Subject: (no subject)%s", nl);
1963                 }
1964         }
1965
1966         for (i=0; !IsEmptyStr(&suser[i]); ++i) {
1967                 suser[i] = tolower(suser[i]);
1968                 if (!isalnum(suser[i])) suser[i]='_';
1969         }
1970
1971         if (mode == MT_RFC822) {
1972                 if (!strcasecmp(snode, NODENAME)) {
1973                         safestrncpy(snode, FQDN, sizeof snode);
1974                 }
1975
1976                 /* Construct a fun message id */
1977                 cprintf("Message-ID: <%s", mid);/// todo: this possibly breaks threadding mails.
1978                 if (strchr(mid, '@')==NULL) {
1979                         cprintf("@%s", snode);
1980                 }
1981                 cprintf(">%s", nl);
1982
1983                 if (!is_room_aide() && (TheMessage->cm_anon_type == MES_ANONONLY)) {
1984                         cprintf("From: \"----\" <x@x.org>%s", nl);
1985                 }
1986                 else if (!is_room_aide() && (TheMessage->cm_anon_type == MES_ANONOPT)) {
1987                         cprintf("From: \"anonymous\" <x@x.org>%s", nl);
1988                 }
1989                 else if (!IsEmptyStr(fuser)) {
1990                         cprintf("From: \"%s\" <%s>%s", luser, fuser, nl);
1991                 }
1992                 else {
1993                         cprintf("From: \"%s\" <%s@%s>%s", luser, suser, snode, nl);
1994                 }
1995
1996                 /* Blank line signifying RFC822 end-of-headers */
1997                 if (TheMessage->cm_format_type != FMT_RFC822) {
1998                         cprintf("%s", nl);
1999                 }
2000         }
2001
2002         /* end header processing loop ... at this point, we're in the text */
2003 START_TEXT:
2004         if (headers_only == HEADERS_FAST) goto DONE;
2005         mptr = TheMessage->cm_fields['M'];
2006
2007         /* Tell the client about the MIME parts in this message */
2008         if (TheMessage->cm_format_type == FMT_RFC822) {
2009                 if ( (mode == MT_CITADEL) || (mode == MT_MIME) ) {
2010                         memset(&ma, 0, sizeof(struct ma_info));
2011                         mime_parser(mptr, NULL,
2012                                 (do_proto ? *list_this_part : NULL),
2013                                 (do_proto ? *list_this_pref : NULL),
2014                                 (do_proto ? *list_this_suff : NULL),
2015                                 (void *)&ma, 0);
2016                 }
2017                 else if (mode == MT_RFC822) {   /* unparsed RFC822 dump */
2018                         char *start_of_text = NULL;
2019                         start_of_text = strstr(mptr, "\n\r\n");
2020                         if (start_of_text == NULL) start_of_text = strstr(mptr, "\n\n");
2021                         if (start_of_text == NULL) start_of_text = mptr;
2022                         ++start_of_text;
2023                         start_of_text = strstr(start_of_text, "\n");
2024                         ++start_of_text;
2025
2026                         char outbuf[1024];
2027                         int outlen = 0;
2028                         int nllen = strlen(nl);
2029                         prev_ch = 0;
2030                         while (ch=*mptr, ch!=0) {
2031                                 if (ch==13) {
2032                                         /* do nothing */
2033                                 }
2034                                 else {
2035                                         if (
2036                                                 ((headers_only == HEADERS_NONE) && (mptr >= start_of_text))
2037                                            ||   ((headers_only == HEADERS_ONLY) && (mptr < start_of_text))
2038                                            ||   ((headers_only != HEADERS_NONE) && (headers_only != HEADERS_ONLY))
2039                                         ) {
2040                                                 if (ch == 10) {
2041                                                         sprintf(&outbuf[outlen], "%s", nl);
2042                                                         outlen += nllen;
2043                                                 }
2044                                                 else {
2045                                                         outbuf[outlen++] = ch;
2046                                                 }
2047                                         }
2048                                 }
2049                                 if (flags & ESC_DOT)
2050                                 {
2051                                         if ((prev_ch == 10) && (ch == '.') && ((*(mptr+1) == 13) || (*(mptr+1) == 10)))
2052                                         {
2053                                                 outbuf[outlen++] = '.';
2054                                         }
2055                                 }
2056                                 prev_ch = ch;
2057                                 ++mptr;
2058                                 if (outlen > 1000) {
2059                                         client_write(outbuf, outlen);
2060                                         outlen = 0;
2061                                 }
2062                         }
2063                         if (outlen > 0) {
2064                                 client_write(outbuf, outlen);
2065                                 outlen = 0;
2066                         }
2067
2068                         goto DONE;
2069                 }
2070         }
2071
2072         if (headers_only == HEADERS_ONLY) {
2073                 goto DONE;
2074         }
2075
2076         /* signify start of msg text */
2077         if ( (mode == MT_CITADEL) || (mode == MT_MIME) ) {
2078                 if (do_proto) cprintf("text\n");
2079         }
2080
2081         /* If the format type on disk is 1 (fixed-format), then we want
2082          * everything to be output completely literally ... regardless of
2083          * what message transfer format is in use.
2084          */
2085         if (TheMessage->cm_format_type == FMT_FIXED) {
2086                 int buflen;
2087                 if (mode == MT_MIME) {
2088                         cprintf("Content-type: text/plain\n\n");
2089                 }
2090                 *buf = '\0';
2091                 buflen = 0;
2092                 while (ch = *mptr++, ch > 0) {
2093                         if (ch == 13)
2094                                 ch = 10;
2095                         if ((ch == 10) || (buflen > 250)) {
2096                                 buf[buflen] = '\0';
2097                                 cprintf("%s%s", buf, nl);
2098                                 *buf = '\0';
2099                                 buflen = 0;
2100                         } else {
2101                                 buf[buflen] = ch;
2102                                 buflen++;
2103                         }
2104                 }
2105                 buf[buflen] = '\0';
2106                 if (!IsEmptyStr(buf))
2107                         cprintf("%s%s", buf, nl);
2108         }
2109
2110         /* If the message on disk is format 0 (Citadel vari-format), we
2111          * output using the formatter at 80 columns.  This is the final output
2112          * form if the transfer format is RFC822, but if the transfer format
2113          * is Citadel proprietary, it'll still work, because the indentation
2114          * for new paragraphs is correct and the client will reformat the
2115          * message to the reader's screen width.
2116          */
2117         if (TheMessage->cm_format_type == FMT_CITADEL) {
2118                 if (mode == MT_MIME) {
2119                         cprintf("Content-type: text/x-citadel-variformat\n\n");
2120                 }
2121                 memfmout(mptr, 0, nl);
2122         }
2123
2124         /* If the message on disk is format 4 (MIME), we've gotta hand it
2125          * off to the MIME parser.  The client has already been told that
2126          * this message is format 1 (fixed format), so the callback function
2127          * we use will display those parts as-is.
2128          */
2129         if (TheMessage->cm_format_type == FMT_RFC822) {
2130                 memset(&ma, 0, sizeof(struct ma_info));
2131
2132                 if (mode == MT_MIME) {
2133                         ma.use_fo_hooks = 0;
2134                         strcpy(ma.chosen_part, "1");
2135                         ma.chosen_pref = 9999;
2136                         mime_parser(mptr, NULL,
2137                                 *choose_preferred, *fixed_output_pre,
2138                                 *fixed_output_post, (void *)&ma, 0);
2139                         mime_parser(mptr, NULL,
2140                                 *output_preferred, NULL, NULL, (void *)&ma, CC->msg4_dont_decode);
2141                 }
2142                 else {
2143                         ma.use_fo_hooks = 1;
2144                         mime_parser(mptr, NULL,
2145                                 *fixed_output, *fixed_output_pre,
2146                                 *fixed_output_post, (void *)&ma, 0);
2147                 }
2148
2149         }
2150
2151 DONE:   /* now we're done */
2152         if (do_proto) cprintf("000\n");
2153         return(om_ok);
2154 }
2155
2156
2157
2158 /*
2159  * display a message (mode 0 - Citadel proprietary)
2160  */
2161 void cmd_msg0(char *cmdbuf)
2162 {
2163         long msgid;
2164         int headers_only = HEADERS_ALL;
2165
2166         msgid = extract_long(cmdbuf, 0);
2167         headers_only = extract_int(cmdbuf, 1);
2168
2169         CtdlOutputMsg(msgid, MT_CITADEL, headers_only, 1, 0, NULL, 0);
2170         return;
2171 }
2172
2173
2174 /*
2175  * display a message (mode 2 - RFC822)
2176  */
2177 void cmd_msg2(char *cmdbuf)
2178 {
2179         long msgid;
2180         int headers_only = HEADERS_ALL;
2181
2182         msgid = extract_long(cmdbuf, 0);
2183         headers_only = extract_int(cmdbuf, 1);
2184
2185         CtdlOutputMsg(msgid, MT_RFC822, headers_only, 1, 1, NULL, 0);
2186 }
2187
2188
2189
2190 /*
2191  * display a message (mode 3 - IGnet raw format - internal programs only)
2192  */
2193 void cmd_msg3(char *cmdbuf)
2194 {
2195         long msgnum;
2196         struct CtdlMessage *msg = NULL;
2197         struct ser_ret smr;
2198
2199         if (CC->internal_pgm == 0) {
2200                 cprintf("%d This command is for internal programs only.\n",
2201                         ERROR + HIGHER_ACCESS_REQUIRED);
2202                 return;
2203         }
2204
2205         msgnum = extract_long(cmdbuf, 0);
2206         msg = CtdlFetchMessage(msgnum, 1);
2207         if (msg == NULL) {
2208                 cprintf("%d Message %ld not found.\n",
2209                         ERROR + MESSAGE_NOT_FOUND, msgnum);
2210                 return;
2211         }
2212
2213         serialize_message(&smr, msg);
2214         CtdlFreeMessage(msg);
2215
2216         if (smr.len == 0) {
2217                 cprintf("%d Unable to serialize message\n",
2218                         ERROR + INTERNAL_ERROR);
2219                 return;
2220         }
2221
2222         cprintf("%d %ld\n", BINARY_FOLLOWS, (long)smr.len);
2223         client_write((char *)smr.ser, (int)smr.len);
2224         free(smr.ser);
2225 }
2226
2227
2228
2229 /*
2230  * Display a message using MIME content types
2231  */
2232 void cmd_msg4(char *cmdbuf)
2233 {
2234         long msgid;
2235         char section[64];
2236
2237         msgid = extract_long(cmdbuf, 0);
2238         extract_token(section, cmdbuf, 1, '|', sizeof section);
2239         CtdlOutputMsg(msgid, MT_MIME, 0, 1, 0, (section[0] ? section : NULL) , 0);
2240 }
2241
2242
2243
2244 /*
2245  * Client tells us its preferred message format(s)
2246  */
2247 void cmd_msgp(char *cmdbuf)
2248 {
2249         if (!strcasecmp(cmdbuf, "dont_decode")) {
2250                 CC->msg4_dont_decode = 1;
2251                 cprintf("%d MSG4 will not pre-decode messages.\n", CIT_OK);
2252         }
2253         else {
2254                 safestrncpy(CC->preferred_formats, cmdbuf, sizeof(CC->preferred_formats));
2255                 cprintf("%d Preferred MIME formats have been set.\n", CIT_OK);
2256         }
2257 }
2258
2259
2260 /*
2261  * Open a component of a MIME message as a download file
2262  */
2263 void cmd_opna(char *cmdbuf)
2264 {
2265         long msgid;
2266         char desired_section[128];
2267
2268         msgid = extract_long(cmdbuf, 0);
2269         extract_token(desired_section, cmdbuf, 1, '|', sizeof desired_section);
2270         safestrncpy(CC->download_desired_section, desired_section,
2271                 sizeof CC->download_desired_section);
2272         CtdlOutputMsg(msgid, MT_DOWNLOAD, 0, 1, 1, NULL, 0);
2273 }
2274
2275
2276 /*
2277  * Open a component of a MIME message and transmit it all at once
2278  */
2279 void cmd_dlat(char *cmdbuf)
2280 {
2281         long msgid;
2282         char desired_section[128];
2283
2284         msgid = extract_long(cmdbuf, 0);
2285         extract_token(desired_section, cmdbuf, 1, '|', sizeof desired_section);
2286         safestrncpy(CC->download_desired_section, desired_section,
2287                 sizeof CC->download_desired_section);
2288         CtdlOutputMsg(msgid, MT_SPEW_SECTION, 0, 1, 1, NULL, 0);
2289 }
2290
2291
2292 /*
2293  * Save one or more message pointers into a specified room
2294  * (Returns 0 for success, nonzero for failure)
2295  * roomname may be NULL to use the current room
2296  *
2297  * Note that the 'supplied_msg' field may be set to NULL, in which case
2298  * the message will be fetched from disk, by number, if we need to perform
2299  * replication checks.  This adds an additional database read, so if the
2300  * caller already has the message in memory then it should be supplied.  (Obviously
2301  * this mode of operation only works if we're saving a single message.)
2302  */
2303 int CtdlSaveMsgPointersInRoom(char *roomname, long newmsgidlist[], int num_newmsgs,
2304                                 int do_repl_check, struct CtdlMessage *supplied_msg)
2305 {
2306         int i, j, unique;
2307         char hold_rm[ROOMNAMELEN];
2308         struct cdbdata *cdbfr;
2309         int num_msgs;
2310         long *msglist;
2311         long highest_msg = 0L;
2312
2313         long msgid = 0;
2314         struct CtdlMessage *msg = NULL;
2315
2316         long *msgs_to_be_merged = NULL;
2317         int num_msgs_to_be_merged = 0;
2318
2319         CtdlLogPrintf(CTDL_DEBUG,
2320                 "CtdlSaveMsgPointersInRoom(room=%s, num_msgs=%d, repl=%d)\n",
2321                 roomname, num_newmsgs, do_repl_check);
2322
2323         strcpy(hold_rm, CC->room.QRname);
2324
2325         /* Sanity checks */
2326         if (newmsgidlist == NULL) return(ERROR + INTERNAL_ERROR);
2327         if (num_newmsgs < 1) return(ERROR + INTERNAL_ERROR);
2328         if (num_newmsgs > 1) supplied_msg = NULL;
2329
2330         /* Now the regular stuff */
2331         if (CtdlGetRoomLock(&CC->room,
2332            ((roomname != NULL) ? roomname : CC->room.QRname) )
2333            != 0) {
2334                 CtdlLogPrintf(CTDL_ERR, "No such room <%s>\n", roomname);
2335                 return(ERROR + ROOM_NOT_FOUND);
2336         }
2337
2338
2339         msgs_to_be_merged = malloc(sizeof(long) * num_newmsgs);
2340         num_msgs_to_be_merged = 0;
2341
2342
2343         cdbfr = cdb_fetch(CDB_MSGLISTS, &CC->room.QRnumber, sizeof(long));
2344         if (cdbfr == NULL) {
2345                 msglist = NULL;
2346                 num_msgs = 0;
2347         } else {
2348                 msglist = (long *) cdbfr->ptr;
2349                 cdbfr->ptr = NULL;      /* CtdlSaveMsgPointerInRoom() now owns this memory */
2350                 num_msgs = cdbfr->len / sizeof(long);
2351                 cdb_free(cdbfr);
2352         }
2353
2354
2355         /* Create a list of msgid's which were supplied by the caller, but do
2356          * not already exist in the target room.  It is absolutely taboo to
2357          * have more than one reference to the same message in a room.
2358          */
2359         for (i=0; i<num_newmsgs; ++i) {
2360                 unique = 1;
2361                 if (num_msgs > 0) for (j=0; j<num_msgs; ++j) {
2362                         if (msglist[j] == newmsgidlist[i]) {
2363                                 unique = 0;
2364                         }
2365                 }
2366                 if (unique) {
2367                         msgs_to_be_merged[num_msgs_to_be_merged++] = newmsgidlist[i];
2368                 }
2369         }
2370
2371         CtdlLogPrintf(9, "%d unique messages to be merged\n", num_msgs_to_be_merged);
2372
2373         /*
2374          * Now merge the new messages
2375          */
2376         msglist = realloc(msglist, (sizeof(long) * (num_msgs + num_msgs_to_be_merged)) );
2377         if (msglist == NULL) {
2378                 CtdlLogPrintf(CTDL_ALERT, "ERROR: can't realloc message list!\n");
2379         }
2380         memcpy(&msglist[num_msgs], msgs_to_be_merged, (sizeof(long) * num_msgs_to_be_merged) );
2381         num_msgs += num_msgs_to_be_merged;
2382
2383         /* Sort the message list, so all the msgid's are in order */
2384         num_msgs = sort_msglist(msglist, num_msgs);
2385
2386         /* Determine the highest message number */
2387         highest_msg = msglist[num_msgs - 1];
2388
2389         /* Write it back to disk. */
2390         cdb_store(CDB_MSGLISTS, &CC->room.QRnumber, (int)sizeof(long),
2391                   msglist, (int)(num_msgs * sizeof(long)));
2392
2393         /* Free up the memory we used. */
2394         free(msglist);
2395
2396         /* Update the highest-message pointer and unlock the room. */
2397         CC->room.QRhighest = highest_msg;
2398         CtdlPutRoomLock(&CC->room);
2399
2400         /* Perform replication checks if necessary */
2401         if ( (DoesThisRoomNeedEuidIndexing(&CC->room)) && (do_repl_check) ) {
2402                 CtdlLogPrintf(CTDL_DEBUG, "CtdlSaveMsgPointerInRoom() doing repl checks\n");
2403
2404                 for (i=0; i<num_msgs_to_be_merged; ++i) {
2405                         msgid = msgs_to_be_merged[i];
2406
2407                         if (supplied_msg != NULL) {
2408                                 msg = supplied_msg;
2409                         }
2410                         else {
2411                                 msg = CtdlFetchMessage(msgid, 0);
2412                         }
2413
2414                         if (msg != NULL) {
2415                                 ReplicationChecks(msg);
2416
2417                                 /* If the message has an Exclusive ID, index that... */
2418                                 if (msg->cm_fields['E'] != NULL) {
2419                                         index_message_by_euid(msg->cm_fields['E'], &CC->room, msgid);
2420                                 }
2421
2422                                 /* Free up the memory we may have allocated */
2423                                 if (msg != supplied_msg) {
2424                                         CtdlFreeMessage(msg);
2425                                 }
2426                         }
2427
2428                 }
2429         }
2430
2431         else {
2432                 CtdlLogPrintf(CTDL_DEBUG, "CtdlSaveMsgPointerInRoom() skips repl checks\n");
2433         }
2434
2435         /* Submit this room for processing by hooks */
2436         PerformRoomHooks(&CC->room);
2437
2438         /* Go back to the room we were in before we wandered here... */
2439         CtdlGetRoom(&CC->room, hold_rm);
2440
2441         /* Bump the reference count for all messages which were merged */
2442         for (i=0; i<num_msgs_to_be_merged; ++i) {
2443                 AdjRefCount(msgs_to_be_merged[i], +1);
2444         }
2445
2446         /* Free up memory... */
2447         if (msgs_to_be_merged != NULL) {
2448                 free(msgs_to_be_merged);
2449         }
2450
2451         /* Return success. */
2452         return (0);
2453 }
2454
2455
2456 /*
2457  * This is the same as CtdlSaveMsgPointersInRoom() but it only accepts
2458  * a single message.
2459  */
2460 int CtdlSaveMsgPointerInRoom(char *roomname, long msgid,
2461                         int do_repl_check, struct CtdlMessage *supplied_msg)
2462 {
2463         return CtdlSaveMsgPointersInRoom(roomname, &msgid, 1, do_repl_check, supplied_msg);
2464 }
2465
2466
2467
2468
2469 /*
2470  * Message base operation to save a new message to the message store
2471  * (returns new message number)
2472  *
2473  * This is the back end for CtdlSubmitMsg() and should not be directly
2474  * called by server-side modules.
2475  *
2476  */
2477 long send_message(struct CtdlMessage *msg) {
2478         long newmsgid;
2479         long retval;
2480         char msgidbuf[256];
2481         struct ser_ret smr;
2482         int is_bigmsg = 0;
2483         char *holdM = NULL;
2484
2485         /* Get a new message number */
2486         newmsgid = get_new_message_number();
2487         snprintf(msgidbuf, sizeof msgidbuf, "%010ld@%s", newmsgid, config.c_fqdn);
2488
2489         /* Generate an ID if we don't have one already */
2490         if (msg->cm_fields['I']==NULL) {
2491                 msg->cm_fields['I'] = strdup(msgidbuf);
2492         }
2493
2494         /* If the message is big, set its body aside for storage elsewhere */
2495         if (msg->cm_fields['M'] != NULL) {
2496                 if (strlen(msg->cm_fields['M']) > BIGMSG) {
2497                         is_bigmsg = 1;
2498                         holdM = msg->cm_fields['M'];
2499                         msg->cm_fields['M'] = NULL;
2500                 }
2501         }
2502
2503         /* Serialize our data structure for storage in the database */
2504         serialize_message(&smr, msg);
2505
2506         if (is_bigmsg) {
2507                 msg->cm_fields['M'] = holdM;
2508         }
2509
2510         if (smr.len == 0) {
2511                 cprintf("%d Unable to serialize message\n",
2512                         ERROR + INTERNAL_ERROR);
2513                 return (-1L);
2514         }
2515
2516         /* Write our little bundle of joy into the message base */
2517         if (cdb_store(CDB_MSGMAIN, &newmsgid, (int)sizeof(long),
2518                       smr.ser, smr.len) < 0) {
2519                 CtdlLogPrintf(CTDL_ERR, "Can't store message\n");
2520                 retval = 0L;
2521         } else {
2522                 if (is_bigmsg) {
2523                         cdb_store(CDB_BIGMSGS,
2524                                 &newmsgid,
2525                                 (int)sizeof(long),
2526                                 holdM,
2527                                 (strlen(holdM) + 1)
2528                         );
2529                 }
2530                 retval = newmsgid;
2531         }
2532
2533         /* Free the memory we used for the serialized message */
2534         free(smr.ser);
2535
2536         /* Return the *local* message ID to the caller
2537          * (even if we're storing an incoming network message)
2538          */
2539         return(retval);
2540 }
2541
2542
2543
2544 /*
2545  * Serialize a struct CtdlMessage into the format used on disk and network.
2546  *
2547  * This function loads up a "struct ser_ret" (defined in server.h) which
2548  * contains the length of the serialized message and a pointer to the
2549  * serialized message in memory.  THE LATTER MUST BE FREED BY THE CALLER.
2550  */
2551 void serialize_message(struct ser_ret *ret,             /* return values */
2552                         struct CtdlMessage *msg)        /* unserialized msg */
2553 {
2554         size_t wlen, fieldlen;
2555         int i;
2556         static char *forder = FORDER;
2557
2558         /*
2559          * Check for valid message format
2560          */
2561         if (is_valid_message(msg) == 0) {
2562                 CtdlLogPrintf(CTDL_ERR, "serialize_message() aborting due to invalid message\n");
2563                 ret->len = 0;
2564                 ret->ser = NULL;
2565                 return;
2566         }
2567
2568         ret->len = 3;
2569         for (i=0; i<26; ++i) if (msg->cm_fields[(int)forder[i]] != NULL)
2570                 ret->len = ret->len +
2571                         strlen(msg->cm_fields[(int)forder[i]]) + 2;
2572
2573         ret->ser = malloc(ret->len);
2574         if (ret->ser == NULL) {
2575                 CtdlLogPrintf(CTDL_ERR, "serialize_message() malloc(%ld) failed: %s\n",
2576                         (long)ret->len, strerror(errno));
2577                 ret->len = 0;
2578                 ret->ser = NULL;
2579                 return;
2580         }
2581
2582         ret->ser[0] = 0xFF;
2583         ret->ser[1] = msg->cm_anon_type;
2584         ret->ser[2] = msg->cm_format_type;
2585         wlen = 3;
2586
2587         for (i=0; i<26; ++i) if (msg->cm_fields[(int)forder[i]] != NULL) {
2588                 fieldlen = strlen(msg->cm_fields[(int)forder[i]]);
2589                 ret->ser[wlen++] = (char)forder[i];
2590                 safestrncpy((char *)&ret->ser[wlen], msg->cm_fields[(int)forder[i]], fieldlen+1);
2591                 wlen = wlen + fieldlen + 1;
2592         }
2593         if (ret->len != wlen) CtdlLogPrintf(CTDL_ERR, "ERROR: len=%ld wlen=%ld\n",
2594                 (long)ret->len, (long)wlen);
2595
2596         return;
2597 }
2598
2599
2600 /*
2601  * Serialize a struct CtdlMessage into the format used on disk and network.
2602  *
2603  * This function loads up a "struct ser_ret" (defined in server.h) which
2604  * contains the length of the serialized message and a pointer to the
2605  * serialized message in memory.  THE LATTER MUST BE FREED BY THE CALLER.
2606  */
2607 void dump_message(struct CtdlMessage *msg,      /* unserialized msg */
2608                   long Siz)                     /* how many chars ? */
2609 {
2610         size_t wlen;
2611         int i;
2612         static char *forder = FORDER;
2613         char *buf;
2614
2615         /*
2616          * Check for valid message format
2617          */
2618         if (is_valid_message(msg) == 0) {
2619                 CtdlLogPrintf(CTDL_ERR, "dump_message() aborting due to invalid message\n");
2620                 return;
2621         }
2622
2623         buf = (char*) malloc (Siz + 1);
2624
2625         wlen = 3;
2626
2627         for (i=0; i<26; ++i) if (msg->cm_fields[(int)forder[i]] != NULL) {
2628                         snprintf (buf, Siz, " msg[%c] = %s ...\n", (char) forder[i],
2629                                    msg->cm_fields[(int)forder[i]]);
2630                         client_write (buf, strlen(buf));
2631                 }
2632
2633         return;
2634 }
2635
2636
2637
2638 /*
2639  * Check to see if any messages already exist in the current room which
2640  * carry the same Exclusive ID as this one.  If any are found, delete them.
2641  */
2642 void ReplicationChecks(struct CtdlMessage *msg) {
2643         long old_msgnum = (-1L);
2644
2645         if (DoesThisRoomNeedEuidIndexing(&CC->room) == 0) return;
2646
2647         CtdlLogPrintf(CTDL_DEBUG, "Performing replication checks in <%s>\n",
2648                 CC->room.QRname);
2649
2650         /* No exclusive id?  Don't do anything. */
2651         if (msg == NULL) return;
2652         if (msg->cm_fields['E'] == NULL) return;
2653         if (IsEmptyStr(msg->cm_fields['E'])) return;
2654         /*CtdlLogPrintf(CTDL_DEBUG, "Exclusive ID: <%s> for room <%s>\n",
2655                 msg->cm_fields['E'], CC->room.QRname);*/
2656
2657         old_msgnum = locate_message_by_euid(msg->cm_fields['E'], &CC->room);
2658         if (old_msgnum > 0L) {
2659                 CtdlLogPrintf(CTDL_DEBUG, "ReplicationChecks() replacing message %ld\n", old_msgnum);
2660                 CtdlDeleteMessages(CC->room.QRname, &old_msgnum, 1, "");
2661         }
2662 }
2663
2664
2665
2666 /*
2667  * Save a message to disk and submit it into the delivery system.
2668  */
2669 long CtdlSubmitMsg(struct CtdlMessage *msg,     /* message to save */
2670                    struct recptypes *recps,     /* recipients (if mail) */
2671                    char *force,                 /* force a particular room? */
2672                    int flags                    /* should the bessage be exported clean? */
2673 ) {
2674         char submit_filename[128];
2675         char generated_timestamp[32];
2676         char hold_rm[ROOMNAMELEN];
2677         char actual_rm[ROOMNAMELEN];
2678         char force_room[ROOMNAMELEN];
2679         char content_type[SIZ];                 /* We have to learn this */
2680         char recipient[SIZ];
2681         long newmsgid;
2682         char *mptr = NULL;
2683         struct ctdluser userbuf;
2684         int a, i;
2685         struct MetaData smi;
2686         FILE *network_fp = NULL;
2687         static int seqnum = 1;
2688         struct CtdlMessage *imsg = NULL;
2689         char *instr = NULL;
2690         size_t instr_alloc = 0;
2691         struct ser_ret smr;
2692         char *hold_R, *hold_D;
2693         char *collected_addresses = NULL;
2694         struct addresses_to_be_filed *aptr = NULL;
2695         char *saved_rfc822_version = NULL;
2696         int qualified_for_journaling = 0;
2697         struct CitContext *CCC = CC;            /* CachedCitContext - performance boost */
2698         char bounce_to[1024] = "";
2699         size_t tmp = 0;
2700         int rv = 0;
2701
2702         CtdlLogPrintf(CTDL_DEBUG, "CtdlSubmitMsg() called\n");
2703         if (is_valid_message(msg) == 0) return(-1);     /* self check */
2704
2705         /* If this message has no timestamp, we take the liberty of
2706          * giving it one, right now.
2707          */
2708         if (msg->cm_fields['T'] == NULL) {
2709                 snprintf(generated_timestamp, sizeof generated_timestamp, "%ld", (long)time(NULL));
2710                 msg->cm_fields['T'] = strdup(generated_timestamp);
2711         }
2712
2713         /* If this message has no path, we generate one.
2714          */
2715         if (msg->cm_fields['P'] == NULL) {
2716                 if (msg->cm_fields['A'] != NULL) {
2717                         msg->cm_fields['P'] = strdup(msg->cm_fields['A']);
2718                         for (a=0; !IsEmptyStr(&msg->cm_fields['P'][a]); ++a) {
2719                                 if (isspace(msg->cm_fields['P'][a])) {
2720                                         msg->cm_fields['P'][a] = ' ';
2721                                 }
2722                         }
2723                 }
2724                 else {
2725                         msg->cm_fields['P'] = strdup("unknown");
2726                 }
2727         }
2728
2729         if (force == NULL) {
2730                 strcpy(force_room, "");
2731         }
2732         else {
2733                 strcpy(force_room, force);
2734         }
2735
2736         /* Learn about what's inside, because it's what's inside that counts */
2737         if (msg->cm_fields['M'] == NULL) {
2738                 CtdlLogPrintf(CTDL_ERR, "ERROR: attempt to save message with NULL body\n");
2739                 return(-2);
2740         }
2741
2742         switch (msg->cm_format_type) {
2743         case 0:
2744                 strcpy(content_type, "text/x-citadel-variformat");
2745                 break;
2746         case 1:
2747                 strcpy(content_type, "text/plain");
2748                 break;
2749         case 4:
2750                 strcpy(content_type, "text/plain");
2751                 mptr = bmstrcasestr(msg->cm_fields['M'], "Content-type:");
2752                 if (mptr != NULL) {
2753                         char *aptr;
2754                         safestrncpy(content_type, &mptr[13], sizeof content_type);
2755                         striplt(content_type);
2756                         aptr = content_type;
2757                         while (!IsEmptyStr(aptr)) {
2758                                 if ((*aptr == ';')
2759                                     || (*aptr == ' ')
2760                                     || (*aptr == 13)
2761                                     || (*aptr == 10)) {
2762                                         *aptr = 0;
2763                                 }
2764                                 else aptr++;
2765                         }
2766                 }
2767         }
2768
2769         /* Goto the correct room */
2770         CtdlLogPrintf(CTDL_DEBUG, "Selected room %s\n", (recps) ? CCC->room.QRname : SENTITEMS);
2771         strcpy(hold_rm, CCC->room.QRname);
2772         strcpy(actual_rm, CCC->room.QRname);
2773         if (recps != NULL) {
2774                 strcpy(actual_rm, SENTITEMS);
2775         }
2776
2777         /* If the user is a twit, move to the twit room for posting */
2778         if (TWITDETECT) {
2779                 if (CCC->user.axlevel == 2) {
2780                         strcpy(hold_rm, actual_rm);
2781                         strcpy(actual_rm, config.c_twitroom);
2782                         CtdlLogPrintf(CTDL_DEBUG, "Diverting to twit room\n");
2783                 }
2784         }
2785
2786         /* ...or if this message is destined for Aide> then go there. */
2787         if (!IsEmptyStr(force_room)) {
2788                 strcpy(actual_rm, force_room);
2789         }
2790
2791         CtdlLogPrintf(CTDL_DEBUG, "Final selection: %s\n", actual_rm);
2792         if (strcasecmp(actual_rm, CCC->room.QRname)) {
2793                 /* CtdlGetRoom(&CCC->room, actual_rm); */
2794                 CtdlUserGoto(actual_rm, 0, 1, NULL, NULL);
2795         }
2796
2797         /*
2798          * If this message has no O (room) field, generate one.
2799          */
2800         if (msg->cm_fields['O'] == NULL) {
2801                 msg->cm_fields['O'] = strdup(CCC->room.QRname);
2802         }
2803
2804         /* Perform "before save" hooks (aborting if any return nonzero) */
2805         CtdlLogPrintf(CTDL_DEBUG, "Performing before-save hooks\n");
2806         if (PerformMessageHooks(msg, EVT_BEFORESAVE) > 0) return(-3);
2807
2808         /*
2809          * If this message has an Exclusive ID, and the room is replication
2810          * checking enabled, then do replication checks.
2811          */
2812         if (DoesThisRoomNeedEuidIndexing(&CCC->room)) {
2813                 ReplicationChecks(msg);
2814         }
2815
2816         /* Save it to disk */
2817         CtdlLogPrintf(CTDL_DEBUG, "Saving to disk\n");
2818         newmsgid = send_message(msg);
2819         if (newmsgid <= 0L) return(-5);
2820
2821         /* Write a supplemental message info record.  This doesn't have to
2822          * be a critical section because nobody else knows about this message
2823          * yet.
2824          */
2825         CtdlLogPrintf(CTDL_DEBUG, "Creating MetaData record\n");
2826         memset(&smi, 0, sizeof(struct MetaData));
2827         smi.meta_msgnum = newmsgid;
2828         smi.meta_refcount = 0;
2829         safestrncpy(smi.meta_content_type, content_type,
2830                         sizeof smi.meta_content_type);
2831
2832         /*
2833          * Measure how big this message will be when rendered as RFC822.
2834          * We do this for two reasons:
2835          * 1. We need the RFC822 length for the new metadata record, so the
2836          *    POP and IMAP services don't have to calculate message lengths
2837          *    while the user is waiting (multiplied by potentially hundreds
2838          *    or thousands of messages).
2839          * 2. If journaling is enabled, we will need an RFC822 version of the
2840          *    message to attach to the journalized copy.
2841          */
2842         if (CCC->redirect_buffer != NULL) {
2843                 CtdlLogPrintf(CTDL_ALERT, "CCC->redirect_buffer is not NULL during message submission!\n");
2844                 abort();
2845         }
2846         CCC->redirect_buffer = malloc(SIZ);
2847         CCC->redirect_len = 0;
2848         CCC->redirect_alloc = SIZ;
2849         CtdlOutputPreLoadedMsg(msg, MT_RFC822, HEADERS_ALL, 0, 1, QP_EADDR);
2850         smi.meta_rfc822_length = CCC->redirect_len;
2851         saved_rfc822_version = CCC->redirect_buffer;
2852         CCC->redirect_buffer = NULL;
2853         CCC->redirect_len = 0;
2854         CCC->redirect_alloc = 0;
2855
2856         PutMetaData(&smi);
2857
2858         /* Now figure out where to store the pointers */
2859         CtdlLogPrintf(CTDL_DEBUG, "Storing pointers\n");
2860
2861         /* If this is being done by the networker delivering a private
2862          * message, we want to BYPASS saving the sender's copy (because there
2863          * is no local sender; it would otherwise go to the Trashcan).
2864          */
2865         if ((!CCC->internal_pgm) || (recps == NULL)) {
2866                 if (CtdlSaveMsgPointerInRoom(actual_rm, newmsgid, 1, msg) != 0) {
2867                         CtdlLogPrintf(CTDL_ERR, "ERROR saving message pointer!\n");
2868                         CtdlSaveMsgPointerInRoom(config.c_aideroom, newmsgid, 0, msg);
2869                 }
2870         }
2871
2872         /* For internet mail, drop a copy in the outbound queue room */
2873         if ((recps != NULL) && (recps->num_internet > 0)) {
2874                 CtdlSaveMsgPointerInRoom(SMTP_SPOOLOUT_ROOM, newmsgid, 0, msg);
2875         }
2876
2877         /* If other rooms are specified, drop them there too. */
2878         if ((recps != NULL) && (recps->num_room > 0))
2879           for (i=0; i<num_tokens(recps->recp_room, '|'); ++i) {
2880                 extract_token(recipient, recps->recp_room, i,
2881                                         '|', sizeof recipient);
2882                 CtdlLogPrintf(CTDL_DEBUG, "Delivering to room <%s>\n", recipient);
2883                 CtdlSaveMsgPointerInRoom(recipient, newmsgid, 0, msg);
2884         }
2885
2886         /* Bump this user's messages posted counter. */
2887         CtdlLogPrintf(CTDL_DEBUG, "Updating user\n");
2888         lgetuser(&CCC->user, CCC->curr_user);
2889         CCC->user.posted = CCC->user.posted + 1;
2890         lputuser(&CCC->user);
2891
2892         /* Decide where bounces need to be delivered */
2893         if ((recps != NULL) && (recps->bounce_to != NULL)) {
2894                 safestrncpy(bounce_to, recps->bounce_to, sizeof bounce_to);
2895         }
2896         else if (CCC->logged_in) {
2897                 snprintf(bounce_to, sizeof bounce_to, "%s@%s", CCC->user.fullname, config.c_nodename);
2898         }
2899         else {
2900                 snprintf(bounce_to, sizeof bounce_to, "%s@%s", msg->cm_fields['A'], msg->cm_fields['N']);
2901         }
2902
2903         /* If this is private, local mail, make a copy in the
2904          * recipient's mailbox and bump the reference count.
2905          */
2906         if ((recps != NULL) && (recps->num_local > 0))
2907           for (i=0; i<num_tokens(recps->recp_local, '|'); ++i) {
2908                 extract_token(recipient, recps->recp_local, i,
2909                                         '|', sizeof recipient);
2910                 CtdlLogPrintf(CTDL_DEBUG, "Delivering private local mail to <%s>\n",
2911                         recipient);
2912                 if (getuser(&userbuf, recipient) == 0) {
2913                         // Add a flag so the Funambol module knows its mail
2914                         msg->cm_fields['W'] = strdup(recipient);
2915                         MailboxName(actual_rm, sizeof actual_rm, &userbuf, MAILROOM);
2916                         CtdlSaveMsgPointerInRoom(actual_rm, newmsgid, 0, msg);
2917                         BumpNewMailCounter(userbuf.usernum);
2918                         if (!IsEmptyStr(config.c_funambol_host) || !IsEmptyStr(config.c_pager_program)) {
2919                         /* Generate a instruction message for the Funambol notification
2920                          * server, in the same style as the SMTP queue
2921                          */
2922                            instr_alloc = 1024;
2923                            instr = malloc(instr_alloc);
2924                            snprintf(instr, instr_alloc,
2925                         "Content-type: %s\n\nmsgid|%ld\nsubmitted|%ld\n"
2926                         "bounceto|%s\n",
2927                         SPOOLMIME, newmsgid, (long)time(NULL),
2928                         bounce_to
2929                         );
2930
2931                            imsg = malloc(sizeof(struct CtdlMessage));
2932                            memset(imsg, 0, sizeof(struct CtdlMessage));
2933                            imsg->cm_magic = CTDLMESSAGE_MAGIC;
2934                            imsg->cm_anon_type = MES_NORMAL;
2935                            imsg->cm_format_type = FMT_RFC822;
2936                            imsg->cm_fields['A'] = strdup("Citadel");
2937                            imsg->cm_fields['J'] = strdup("do not journal");
2938                            imsg->cm_fields['M'] = instr;        /* imsg owns this memory now */
2939                            imsg->cm_fields['W'] = strdup(recipient);
2940                            CtdlSubmitMsg(imsg, NULL, FNBL_QUEUE_ROOM, 0);
2941                            CtdlFreeMessage(imsg);
2942                         }
2943                 }
2944                 else {
2945                         CtdlLogPrintf(CTDL_DEBUG, "No user <%s>\n", recipient);
2946                         CtdlSaveMsgPointerInRoom(config.c_aideroom,
2947                                 newmsgid, 0, msg);
2948                 }
2949         }
2950
2951         /* Perform "after save" hooks */
2952         CtdlLogPrintf(CTDL_DEBUG, "Performing after-save hooks\n");
2953         PerformMessageHooks(msg, EVT_AFTERSAVE);
2954
2955         /* For IGnet mail, we have to save a new copy into the spooler for
2956          * each recipient, with the R and D fields set to the recipient and
2957          * destination-node.  This has two ugly side effects: all other
2958          * recipients end up being unlisted in this recipient's copy of the
2959          * message, and it has to deliver multiple messages to the same
2960          * node.  We'll revisit this again in a year or so when everyone has
2961          * a network spool receiver that can handle the new style messages.
2962          */
2963         if ((recps != NULL) && (recps->num_ignet > 0))
2964           for (i=0; i<num_tokens(recps->recp_ignet, '|'); ++i) {
2965                 extract_token(recipient, recps->recp_ignet, i,
2966                                 '|', sizeof recipient);
2967
2968                 hold_R = msg->cm_fields['R'];
2969                 hold_D = msg->cm_fields['D'];
2970                 msg->cm_fields['R'] = malloc(SIZ);
2971                 msg->cm_fields['D'] = malloc(128);
2972                 extract_token(msg->cm_fields['R'], recipient, 0, '@', SIZ);
2973                 extract_token(msg->cm_fields['D'], recipient, 1, '@', 128);
2974
2975                 serialize_message(&smr, msg);
2976                 if (smr.len > 0) {
2977                         snprintf(submit_filename, sizeof submit_filename,
2978                                          "%s/netmail.%04lx.%04x.%04x",
2979                                          ctdl_netin_dir,
2980                                          (long) getpid(), CCC->cs_pid, ++seqnum);
2981                         network_fp = fopen(submit_filename, "wb+");
2982                         if (network_fp != NULL) {
2983                                 rv = fwrite(smr.ser, smr.len, 1, network_fp);
2984                                 fclose(network_fp);
2985                         }
2986                         free(smr.ser);
2987                 }
2988
2989                 free(msg->cm_fields['R']);
2990                 free(msg->cm_fields['D']);
2991                 msg->cm_fields['R'] = hold_R;
2992                 msg->cm_fields['D'] = hold_D;
2993         }
2994
2995         /* Go back to the room we started from */
2996         CtdlLogPrintf(CTDL_DEBUG, "Returning to original room %s\n", hold_rm);
2997         if (strcasecmp(hold_rm, CCC->room.QRname))
2998                 CtdlUserGoto(hold_rm, 0, 1, NULL, NULL);
2999
3000         /* For internet mail, generate delivery instructions.
3001          * Yes, this is recursive.  Deal with it.  Infinite recursion does
3002          * not happen because the delivery instructions message does not
3003          * contain a recipient.
3004          */
3005         if ((recps != NULL) && (recps->num_internet > 0)) {
3006                 CtdlLogPrintf(CTDL_DEBUG, "Generating delivery instructions\n");
3007                 instr_alloc = 1024;
3008                 instr = malloc(instr_alloc);
3009                 snprintf(instr, instr_alloc,
3010                         "Content-type: %s\n\nmsgid|%ld\nsubmitted|%ld\n"
3011                         "bounceto|%s\n",
3012                         SPOOLMIME, newmsgid, (long)time(NULL),
3013                         bounce_to
3014                 );
3015
3016                 if (recps->envelope_from != NULL) {
3017                         tmp = strlen(instr);
3018                         snprintf(&instr[tmp], instr_alloc-tmp, "envelope_from|%s\n", recps->envelope_from);
3019                 }
3020
3021                 for (i=0; i<num_tokens(recps->recp_internet, '|'); ++i) {
3022                         tmp = strlen(instr);
3023                         extract_token(recipient, recps->recp_internet, i, '|', sizeof recipient);
3024                         if ((tmp + strlen(recipient) + 32) > instr_alloc) {
3025                                 instr_alloc = instr_alloc * 2;
3026                                 instr = realloc(instr, instr_alloc);
3027                         }
3028                         snprintf(&instr[tmp], instr_alloc - tmp, "remote|%s|0||\n", recipient);
3029                 }
3030
3031                 imsg = malloc(sizeof(struct CtdlMessage));
3032                 memset(imsg, 0, sizeof(struct CtdlMessage));
3033                 imsg->cm_magic = CTDLMESSAGE_MAGIC;
3034                 imsg->cm_anon_type = MES_NORMAL;
3035                 imsg->cm_format_type = FMT_RFC822;
3036                 imsg->cm_fields['A'] = strdup("Citadel");
3037                 imsg->cm_fields['J'] = strdup("do not journal");
3038                 imsg->cm_fields['M'] = instr;   /* imsg owns this memory now */
3039                 CtdlSubmitMsg(imsg, NULL, SMTP_SPOOLOUT_ROOM, QP_EADDR);
3040                 CtdlFreeMessage(imsg);
3041         }
3042
3043         /*
3044          * Any addresses to harvest for someone's address book?
3045          */
3046         if ( (CCC->logged_in) && (recps != NULL) ) {
3047                 collected_addresses = harvest_collected_addresses(msg);
3048         }
3049
3050         if (collected_addresses != NULL) {
3051                 aptr = (struct addresses_to_be_filed *)
3052                         malloc(sizeof(struct addresses_to_be_filed));
3053                 MailboxName(actual_rm, sizeof actual_rm,
3054                         &CCC->user, USERCONTACTSROOM);
3055                 aptr->roomname = strdup(actual_rm);
3056                 aptr->collected_addresses = collected_addresses;
3057                 begin_critical_section(S_ATBF);
3058                 aptr->next = atbf;
3059                 atbf = aptr;
3060                 end_critical_section(S_ATBF);
3061         }
3062
3063         /*
3064          * Determine whether this message qualifies for journaling.
3065          */
3066         if (msg->cm_fields['J'] != NULL) {
3067                 qualified_for_journaling = 0;
3068         }
3069         else {
3070                 if (recps == NULL) {
3071                         qualified_for_journaling = config.c_journal_pubmsgs;
3072                 }
3073                 else if (recps->num_local + recps->num_ignet + recps->num_internet > 0) {
3074                         qualified_for_journaling = config.c_journal_email;
3075                 }
3076                 else {
3077                         qualified_for_journaling = config.c_journal_pubmsgs;
3078                 }
3079         }
3080
3081         /*
3082          * Do we have to perform journaling?  If so, hand off the saved
3083          * RFC822 version will be handed off to the journaler for background
3084          * submit.  Otherwise, we have to free the memory ourselves.
3085          */
3086         if (saved_rfc822_version != NULL) {
3087                 if (qualified_for_journaling) {
3088                         JournalBackgroundSubmit(msg, saved_rfc822_version, recps);
3089                 }
3090                 else {
3091                         free(saved_rfc822_version);
3092                 }
3093         }
3094
3095         /* Done. */
3096         return(newmsgid);
3097 }
3098
3099
3100
3101
3102
3103 /*
3104  * Convenience function for generating small administrative messages.
3105  */
3106 void quickie_message(const char *from, const char *fromaddr, char *to, char *room, const char *text,
3107                         int format_type, const char *subject)
3108 {
3109         struct CtdlMessage *msg;
3110         struct recptypes *recp = NULL;
3111
3112         msg = malloc(sizeof(struct CtdlMessage));
3113         memset(msg, 0, sizeof(struct CtdlMessage));
3114         msg->cm_magic = CTDLMESSAGE_MAGIC;
3115         msg->cm_anon_type = MES_NORMAL;
3116         msg->cm_format_type = format_type;
3117
3118         if (from != NULL) {
3119                 msg->cm_fields['A'] = strdup(from);
3120         }
3121         else if (fromaddr != NULL) {
3122                 msg->cm_fields['A'] = strdup(fromaddr);
3123                 if (strchr(msg->cm_fields['A'], '@')) {
3124                         *strchr(msg->cm_fields['A'], '@') = 0;
3125                 }
3126         }
3127         else {
3128                 msg->cm_fields['A'] = strdup("Citadel");
3129         }
3130
3131         if (fromaddr != NULL) msg->cm_fields['F'] = strdup(fromaddr);
3132         if (room != NULL) msg->cm_fields['O'] = strdup(room);
3133         msg->cm_fields['N'] = strdup(NODENAME);
3134         if (to != NULL) {
3135                 msg->cm_fields['R'] = strdup(to);
3136                 recp = validate_recipients(to, NULL, 0);
3137         }
3138         if (subject != NULL) {
3139                 msg->cm_fields['U'] = strdup(subject);
3140         }
3141         msg->cm_fields['M'] = strdup(text);
3142
3143         CtdlSubmitMsg(msg, recp, room, 0);
3144         CtdlFreeMessage(msg);
3145         if (recp != NULL) free_recipients(recp);
3146 }
3147
3148
3149
3150 /*
3151  * Back end function used by CtdlMakeMessage() and similar functions
3152  */
3153 char *CtdlReadMessageBody(char *terminator,     /* token signalling EOT */
3154                         size_t maxlen,          /* maximum message length */
3155                         char *exist,            /* if non-null, append to it;
3156                                                    exist is ALWAYS freed  */
3157                         int crlf,               /* CRLF newlines instead of LF */
3158                         int sock                /* socket handle or 0 for this session's client socket */
3159                         ) {
3160         char buf[1024];
3161         int linelen;
3162         size_t message_len = 0;
3163         size_t buffer_len = 0;
3164         char *ptr;
3165         char *m;
3166         int flushing = 0;
3167         int finished = 0;
3168         int dotdot = 0;
3169
3170         if (exist == NULL) {
3171                 m = malloc(4096);
3172                 m[0] = 0;
3173                 buffer_len = 4096;
3174                 message_len = 0;
3175         }
3176         else {
3177                 message_len = strlen(exist);
3178                 buffer_len = message_len + 4096;
3179                 m = realloc(exist, buffer_len);
3180                 if (m == NULL) {
3181                         free(exist);
3182                         return m;
3183                 }
3184         }
3185
3186         /* Do we need to change leading ".." to "." for SMTP escaping? */
3187         if (!strcmp(terminator, ".")) {
3188                 dotdot = 1;
3189         }
3190
3191         /* flush the input if we have nowhere to store it */
3192         if (m == NULL) {
3193                 flushing = 1;
3194         }
3195
3196         /* read in the lines of message text one by one */
3197         do {
3198                 if (sock > 0) {
3199                         if (sock_getln(sock, buf, (sizeof buf - 3)) < 0) finished = 1;
3200                 }
3201                 else {
3202                         if (client_getln(buf, (sizeof buf - 3)) < 1) finished = 1;
3203                 }
3204                 if (!strcmp(buf, terminator)) finished = 1;
3205                 if (crlf) {
3206                         strcat(buf, "\r\n");
3207                 }
3208                 else {
3209                         strcat(buf, "\n");
3210                 }
3211
3212                 /* Unescape SMTP-style input of two dots at the beginning of the line */
3213                 if (dotdot) {
3214                         if (!strncmp(buf, "..", 2)) {
3215                                 strcpy(buf, &buf[1]);
3216                         }
3217                 }
3218
3219                 if ( (!flushing) && (!finished) ) {
3220                         /* Measure the line */
3221                         linelen = strlen(buf);
3222
3223                         /* augment the buffer if we have to */
3224                         if ((message_len + linelen) >= buffer_len) {
3225                                 ptr = realloc(m, (buffer_len * 2) );
3226                                 if (ptr == NULL) {      /* flush if can't allocate */
3227                                         flushing = 1;
3228                                 } else {
3229                                         buffer_len = (buffer_len * 2);
3230                                         m = ptr;
3231                                         CtdlLogPrintf(CTDL_DEBUG, "buffer_len is now %ld\n", (long)buffer_len);
3232                                 }
3233                         }
3234
3235                         /* Add the new line to the buffer.  NOTE: this loop must avoid
3236                         * using functions like strcat() and strlen() because they
3237                         * traverse the entire buffer upon every call, and doing that
3238                         * for a multi-megabyte message slows it down beyond usability.
3239                         */
3240                         strcpy(&m[message_len], buf);
3241                         message_len += linelen;
3242                 }
3243
3244                 /* if we've hit the max msg length, flush the rest */
3245                 if (message_len >= maxlen) flushing = 1;
3246
3247         } while (!finished);
3248         return(m);
3249 }
3250
3251
3252
3253
3254 /*
3255  * Build a binary message to be saved on disk.
3256  * (NOTE: if you supply 'preformatted_text', the buffer you give it
3257  * will become part of the message.  This means you are no longer
3258  * responsible for managing that memory -- it will be freed along with
3259  * the rest of the fields when CtdlFreeMessage() is called.)
3260  */
3261
3262 struct CtdlMessage *CtdlMakeMessage(
3263         struct ctdluser *author,        /* author's user structure */
3264         char *recipient,                /* NULL if it's not mail */
3265         char *recp_cc,                  /* NULL if it's not mail */
3266         char *room,                     /* room where it's going */
3267         int type,                       /* see MES_ types in header file */
3268         int format_type,                /* variformat, plain text, MIME... */
3269         char *fake_name,                /* who we're masquerading as */
3270         char *my_email,                 /* which of my email addresses to use (empty is ok) */
3271         char *subject,                  /* Subject (optional) */
3272         char *supplied_euid,            /* ...or NULL if this is irrelevant */
3273         char *preformatted_text,        /* ...or NULL to read text from client */
3274         char *references                /* Thread references */
3275 ) {
3276         char dest_node[256];
3277         char buf[1024];
3278         struct CtdlMessage *msg;
3279
3280         msg = malloc(sizeof(struct CtdlMessage));
3281         memset(msg, 0, sizeof(struct CtdlMessage));
3282         msg->cm_magic = CTDLMESSAGE_MAGIC;
3283         msg->cm_anon_type = type;
3284         msg->cm_format_type = format_type;
3285
3286         /* Don't confuse the poor folks if it's not routed mail. */
3287         strcpy(dest_node, "");
3288
3289         if (recipient != NULL) striplt(recipient);
3290         if (recp_cc != NULL) striplt(recp_cc);
3291
3292         /* Path or Return-Path */
3293         if (my_email == NULL) my_email = "";
3294
3295         if (!IsEmptyStr(my_email)) {
3296                 msg->cm_fields['P'] = strdup(my_email);
3297         }
3298         else {
3299                 snprintf(buf, sizeof buf, "%s", author->fullname);
3300                 msg->cm_fields['P'] = strdup(buf);
3301         }
3302         convert_spaces_to_underscores(msg->cm_fields['P']);
3303
3304         snprintf(buf, sizeof buf, "%ld", (long)time(NULL));     /* timestamp */
3305         msg->cm_fields['T'] = strdup(buf);
3306
3307         if ((fake_name != NULL) && (fake_name[0])) {            /* author */
3308                 msg->cm_fields['A'] = strdup(fake_name);
3309         }
3310         else {
3311                 msg->cm_fields['A'] = strdup(author->fullname);
3312         }
3313
3314         if (CC->room.QRflags & QR_MAILBOX) {            /* room */
3315                 msg->cm_fields['O'] = strdup(&CC->room.QRname[11]);
3316         }
3317         else {
3318                 msg->cm_fields['O'] = strdup(CC->room.QRname);
3319         }
3320
3321         msg->cm_fields['N'] = strdup(NODENAME);         /* nodename */
3322         msg->cm_fields['H'] = strdup(HUMANNODE);                /* hnodename */
3323
3324         if ((recipient != NULL) && (recipient[0] != 0)) {
3325                 msg->cm_fields['R'] = strdup(recipient);
3326         }
3327         if ((recp_cc != NULL) && (recp_cc[0] != 0)) {
3328                 msg->cm_fields['Y'] = strdup(recp_cc);
3329         }
3330         if (dest_node[0] != 0) {
3331                 msg->cm_fields['D'] = strdup(dest_node);
3332         }
3333
3334         if (!IsEmptyStr(my_email)) {
3335                 msg->cm_fields['F'] = strdup(my_email);
3336         }
3337         else if ( (author == &CC->user) && (!IsEmptyStr(CC->cs_inet_email)) ) {
3338                 msg->cm_fields['F'] = strdup(CC->cs_inet_email);
3339         }
3340
3341         if (subject != NULL) {
3342                 long length;
3343                 striplt(subject);
3344                 length = strlen(subject);
3345                 if (length > 0) {
3346                         long i;
3347                         long IsAscii;
3348                         IsAscii = -1;
3349                         i = 0;
3350                         while ((subject[i] != '\0') &&
3351                                (IsAscii = isascii(subject[i]) != 0 ))
3352                                 i++;
3353                         if (IsAscii != 0)
3354                                 msg->cm_fields['U'] = strdup(subject);
3355                         else /* ok, we've got utf8 in the string. */
3356                         {
3357                                 msg->cm_fields['U'] = rfc2047encode(subject, length);
3358                         }
3359
3360                 }
3361         }
3362
3363         if (supplied_euid != NULL) {
3364                 msg->cm_fields['E'] = strdup(supplied_euid);
3365         }
3366
3367         if (references != NULL) {
3368                 if (!IsEmptyStr(references)) {
3369                         msg->cm_fields['W'] = strdup(references);
3370                 }
3371         }
3372
3373         if (preformatted_text != NULL) {
3374                 msg->cm_fields['M'] = preformatted_text;
3375         }
3376         else {
3377                 msg->cm_fields['M'] = CtdlReadMessageBody("000", config.c_maxmsglen, NULL, 0, 0);
3378         }
3379
3380         return(msg);
3381 }
3382
3383
3384 /*
3385  * Check to see whether we have permission to post a message in the current
3386  * room.  Returns a *CITADEL ERROR CODE* and puts a message in errmsgbuf, or
3387  * returns 0 on success.
3388  */
3389 int CtdlDoIHavePermissionToPostInThisRoom(char *errmsgbuf,
3390                                           size_t n,
3391                                           const char* RemoteIdentifier,
3392                                           int PostPublic) {
3393         int ra;
3394
3395         if (!(CC->logged_in) &&
3396             (PostPublic == POST_LOGGED_IN)) {
3397                 snprintf(errmsgbuf, n, "Not logged in.");
3398                 return (ERROR + NOT_LOGGED_IN);
3399         }
3400         else if (PostPublic == CHECK_EXISTANCE) {
3401                 return (0); // We're Evaling whether a recipient exists
3402         }
3403         else if (!(CC->logged_in)) {
3404
3405                 if ((CC->room.QRflags & QR_READONLY)) {
3406                         snprintf(errmsgbuf, n, "Not logged in.");
3407                         return (ERROR + NOT_LOGGED_IN);
3408                 }
3409                 if (CC->room.QRflags2 & QR2_MODERATED) {
3410                         snprintf(errmsgbuf, n, "Not logged in Moderation feature not yet implemented!");
3411                         return (ERROR + NOT_LOGGED_IN);
3412                 }
3413                 if ((PostPublic!=POST_LMTP) &&(CC->room.QRflags2 & QR2_SMTP_PUBLIC) == 0) {
3414                         SpoolControl *sc;
3415                         char filename[SIZ];
3416                         int found;
3417
3418                         if (RemoteIdentifier == NULL)
3419                         {
3420                                 snprintf(errmsgbuf, n, "Need sender to permit access.");
3421                                 return (ERROR + USERNAME_REQUIRED);
3422                         }
3423
3424                         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
3425                         begin_critical_section(S_NETCONFIGS);
3426                         if (!read_spoolcontrol_file(&sc, filename))
3427                         {
3428                                 end_critical_section(S_NETCONFIGS);
3429                                 snprintf(errmsgbuf, n,
3430                                         "This mailing list only accepts posts from subscribers.");
3431                                 return (ERROR + NO_SUCH_USER);
3432                         }
3433                         end_critical_section(S_NETCONFIGS);
3434                         found = is_recipient (sc, RemoteIdentifier);
3435                         free_spoolcontrol_struct(&sc);
3436                         if (found) {
3437                                 return (0);
3438                         }
3439                         else {
3440                                 snprintf(errmsgbuf, n,
3441                                         "This mailing list only accepts posts from subscribers.");
3442                                 return (ERROR + NO_SUCH_USER);
3443                         }
3444                 }
3445                 return (0);
3446
3447         }
3448
3449         if ((CC->user.axlevel < 2)
3450             && ((CC->room.QRflags & QR_MAILBOX) == 0)) {
3451                 snprintf(errmsgbuf, n, "Need to be validated to enter "
3452                                 "(except in %s> to sysop)", MAILROOM);
3453                 return (ERROR + HIGHER_ACCESS_REQUIRED);
3454         }
3455
3456         CtdlRoomAccess(&CC->room, &CC->user, &ra, NULL);
3457         if (!(ra & UA_POSTALLOWED)) {
3458                 snprintf(errmsgbuf, n, "Higher access is required to post in this room.");
3459                 return (ERROR + HIGHER_ACCESS_REQUIRED);
3460         }
3461
3462         strcpy(errmsgbuf, "Ok");
3463         return(0);
3464 }
3465
3466
3467 /*
3468  * Check to see if the specified user has Internet mail permission
3469  * (returns nonzero if permission is granted)
3470  */
3471 int CtdlCheckInternetMailPermission(struct ctdluser *who) {
3472
3473         /* Do not allow twits to send Internet mail */
3474         if (who->axlevel <= 2) return(0);
3475
3476         /* Globally enabled? */
3477         if (config.c_restrict == 0) return(1);
3478
3479         /* User flagged ok? */
3480         if (who->flags & US_INTERNET) return(2);
3481
3482         /* Aide level access? */
3483         if (who->axlevel >= 6) return(3);
3484
3485         /* No mail for you! */
3486         return(0);
3487 }
3488
3489
3490 /*
3491  * Validate recipients, count delivery types and errors, and handle aliasing
3492  * FIXME check for dupes!!!!!
3493  *
3494  * Returns 0 if all addresses are ok, ret->num_error = -1 if no addresses
3495  * were specified, or the number of addresses found invalid.
3496  *
3497  * Caller needs to free the result using free_recipients()
3498  */
3499 struct recptypes *validate_recipients(char *supplied_recipients,
3500                                       const char *RemoteIdentifier,
3501                                       int Flags) {
3502         struct recptypes *ret;
3503         char *recipients = NULL;
3504         char this_recp[256];
3505         char this_recp_cooked[256];
3506         char append[SIZ];
3507         int num_recps = 0;
3508         int i, j;
3509         int mailtype;
3510         int invalid;
3511         struct ctdluser tempUS;
3512         struct ctdlroom tempQR;
3513         struct ctdlroom tempQR2;
3514         int err = 0;
3515         char errmsg[SIZ];
3516         int in_quotes = 0;
3517
3518         /* Initialize */
3519         ret = (struct recptypes *) malloc(sizeof(struct recptypes));
3520         if (ret == NULL) return(NULL);
3521
3522         /* Set all strings to null and numeric values to zero */
3523         memset(ret, 0, sizeof(struct recptypes));
3524
3525         if (supplied_recipients == NULL) {
3526                 recipients = strdup("");
3527         }
3528         else {
3529                 recipients = strdup(supplied_recipients);
3530         }
3531
3532         /* Allocate some memory.  Yes, this allocates 500% more memory than we will
3533          * actually need, but it's healthier for the heap than doing lots of tiny
3534          * realloc() calls instead.
3535          */
3536
3537         ret->errormsg = malloc(strlen(recipients) + 1024);
3538         ret->recp_local = malloc(strlen(recipients) + 1024);
3539         ret->recp_internet = malloc(strlen(recipients) + 1024);
3540         ret->recp_ignet = malloc(strlen(recipients) + 1024);
3541         ret->recp_room = malloc(strlen(recipients) + 1024);
3542         ret->display_recp = malloc(strlen(recipients) + 1024);
3543
3544         ret->errormsg[0] = 0;
3545         ret->recp_local[0] = 0;
3546         ret->recp_internet[0] = 0;
3547         ret->recp_ignet[0] = 0;
3548         ret->recp_room[0] = 0;
3549         ret->display_recp[0] = 0;
3550
3551         ret->recptypes_magic = RECPTYPES_MAGIC;
3552
3553         /* Change all valid separator characters to commas */
3554         for (i=0; !IsEmptyStr(&recipients[i]); ++i) {
3555                 if ((recipients[i] == ';') || (recipients[i] == '|')) {
3556                         recipients[i] = ',';
3557                 }
3558         }
3559
3560         /* Now start extracting recipients... */
3561
3562         while (!IsEmptyStr(recipients)) {
3563
3564                 for (i=0; i<=strlen(recipients); ++i) {
3565                         if (recipients[i] == '\"') in_quotes = 1 - in_quotes;
3566                         if ( ( (recipients[i] == ',') && (!in_quotes) ) || (recipients[i] == 0) ) {
3567                                 safestrncpy(this_recp, recipients, i+1);
3568                                 this_recp[i] = 0;
3569                                 if (recipients[i] == ',') {
3570                                         strcpy(recipients, &recipients[i+1]);
3571                                 }
3572                                 else {
3573                                         strcpy(recipients, "");
3574                                 }
3575                                 break;
3576                         }
3577                 }
3578
3579                 striplt(this_recp);
3580                 if (IsEmptyStr(this_recp))
3581                         break;
3582                 CtdlLogPrintf(CTDL_DEBUG, "Evaluating recipient #%d: %s\n", num_recps, this_recp);
3583                 ++num_recps;
3584                 mailtype = alias(this_recp);
3585                 mailtype = alias(this_recp);
3586                 mailtype = alias(this_recp);
3587                 j = 0;
3588                 for (j=0; !IsEmptyStr(&this_recp[j]); ++j) {
3589                         if (this_recp[j]=='_') {
3590                                 this_recp_cooked[j] = ' ';
3591                         }
3592                         else {
3593                                 this_recp_cooked[j] = this_recp[j];
3594                         }
3595                 }
3596                 this_recp_cooked[j] = '\0';
3597                 invalid = 0;
3598                 errmsg[0] = 0;
3599                 switch(mailtype) {
3600                         case MES_LOCAL:
3601                                 if (!strcasecmp(this_recp, "sysop")) {
3602                                         ++ret->num_room;
3603                                         strcpy(this_recp, config.c_aideroom);
3604                                         if (!IsEmptyStr(ret->recp_room)) {
3605                                                 strcat(ret->recp_room, "|");
3606                                         }
3607                                         strcat(ret->recp_room, this_recp);
3608                                 }
3609                                 else if ( (!strncasecmp(this_recp, "room_", 5))
3610                                       && (!CtdlGetRoom(&tempQR, &this_recp_cooked[5])) ) {
3611
3612                                         /* Save room so we can restore it later */
3613                                         tempQR2 = CC->room;
3614                                         CC->room = tempQR;
3615
3616                                         /* Check permissions to send mail to this room */
3617                                         err = CtdlDoIHavePermissionToPostInThisRoom(errmsg,
3618                                                                                     sizeof errmsg,
3619                                                                                     RemoteIdentifier,
3620                                                                                     Flags
3621                                         );
3622                                         if (err)
3623                                         {
3624                                                 ++ret->num_error;
3625                                                 invalid = 1;
3626                                         }
3627                                         else {
3628                                                 ++ret->num_room;
3629                                                 if (!IsEmptyStr(ret->recp_room)) {
3630                                                         strcat(ret->recp_room, "|");
3631                                                 }
3632                                                 strcat(ret->recp_room, &this_recp_cooked[5]);
3633                                         }
3634
3635                                         /* Restore room in case something needs it */
3636                                         CC->room = tempQR2;
3637
3638                                 }
3639                                 else if (getuser(&tempUS, this_recp) == 0) {
3640                                         ++ret->num_local;
3641                                         strcpy(this_recp, tempUS.fullname);
3642                                         if (!IsEmptyStr(ret->recp_local)) {
3643                                                 strcat(ret->recp_local, "|");
3644                                         }
3645                                         strcat(ret->recp_local, this_recp);
3646                                 }
3647                                 else if (getuser(&tempUS, this_recp_cooked) == 0) {
3648                                         ++ret->num_local;
3649                                         strcpy(this_recp, tempUS.fullname);
3650                                         if (!IsEmptyStr(ret->recp_local)) {
3651                                                 strcat(ret->recp_local, "|");
3652                                         }
3653                                         strcat(ret->recp_local, this_recp);
3654                                 }
3655                                 else {
3656                                         ++ret->num_error;
3657                                         invalid = 1;
3658                                 }
3659                                 break;
3660                         case MES_INTERNET:
3661                                 /* Yes, you're reading this correctly: if the target
3662                                  * domain points back to the local system or an attached
3663                                  * Citadel directory, the address is invalid.  That's
3664                                  * because if the address were valid, we would have
3665                                  * already translated it to a local address by now.
3666                                  */
3667                                 if (IsDirectory(this_recp, 0)) {
3668                                         ++ret->num_error;
3669                                         invalid = 1;
3670                                 }
3671                                 else {
3672                                         ++ret->num_internet;
3673                                         if (!IsEmptyStr(ret->recp_internet)) {
3674                                                 strcat(ret->recp_internet, "|");
3675                                         }
3676                                         strcat(ret->recp_internet, this_recp);
3677                                 }
3678                                 break;
3679                         case MES_IGNET:
3680                                 ++ret->num_ignet;
3681                                 if (!IsEmptyStr(ret->recp_ignet)) {
3682                                         strcat(ret->recp_ignet, "|");
3683                                 }
3684                                 strcat(ret->recp_ignet, this_recp);
3685                                 break;
3686                         case MES_ERROR:
3687                                 ++ret->num_error;
3688                                 invalid = 1;
3689                                 break;
3690                 }
3691                 if (invalid) {
3692                         if (IsEmptyStr(errmsg)) {
3693                                 snprintf(append, sizeof append, "Invalid recipient: %s", this_recp);
3694                         }
3695                         else {
3696                                 snprintf(append, sizeof append, "%s", errmsg);
3697                         }
3698                         if ( (strlen(ret->errormsg) + strlen(append) + 3) < SIZ) {
3699                                 if (!IsEmptyStr(ret->errormsg)) {
3700                                         strcat(ret->errormsg, "; ");
3701                                 }
3702                                 strcat(ret->errormsg, append);
3703                         }
3704                 }
3705                 else {
3706                         if (IsEmptyStr(ret->display_recp)) {
3707                                 strcpy(append, this_recp);
3708                         }
3709                         else {
3710                                 snprintf(append, sizeof append, ", %s", this_recp);
3711                         }
3712                         if ( (strlen(ret->display_recp)+strlen(append)) < SIZ) {
3713                                 strcat(ret->display_recp, append);
3714                         }
3715                 }
3716         }
3717
3718         if ((ret->num_local + ret->num_internet + ret->num_ignet +
3719            ret->num_room + ret->num_error) == 0) {
3720                 ret->num_error = (-1);
3721                 strcpy(ret->errormsg, "No recipients specified.");
3722         }
3723
3724         CtdlLogPrintf(CTDL_DEBUG, "validate_recipients()\n");
3725         CtdlLogPrintf(CTDL_DEBUG, " local: %d <%s>\n", ret->num_local, ret->recp_local);
3726         CtdlLogPrintf(CTDL_DEBUG, "  room: %d <%s>\n", ret->num_room, ret->recp_room);
3727         CtdlLogPrintf(CTDL_DEBUG, "  inet: %d <%s>\n", ret->num_internet, ret->recp_internet);
3728         CtdlLogPrintf(CTDL_DEBUG, " ignet: %d <%s>\n", ret->num_ignet, ret->recp_ignet);
3729         CtdlLogPrintf(CTDL_DEBUG, " error: %d <%s>\n", ret->num_error, ret->errormsg);
3730
3731         free(recipients);
3732         return(ret);
3733 }
3734
3735
3736 /*
3737  * Destructor for struct recptypes
3738  */
3739 void free_recipients(struct recptypes *valid) {
3740
3741         if (valid == NULL) {
3742                 return;
3743         }
3744
3745         if (valid->recptypes_magic != RECPTYPES_MAGIC) {
3746                 CtdlLogPrintf(CTDL_EMERG, "Attempt to call free_recipients() on some other data type!\n");
3747                 abort();
3748         }
3749
3750         if (valid->errormsg != NULL)            free(valid->errormsg);
3751         if (valid->recp_local != NULL)          free(valid->recp_local);
3752         if (valid->recp_internet != NULL)       free(valid->recp_internet);
3753         if (valid->recp_ignet != NULL)          free(valid->recp_ignet);
3754         if (valid->recp_room != NULL)           free(valid->recp_room);
3755         if (valid->display_recp != NULL)        free(valid->display_recp);
3756         if (valid->bounce_to != NULL)           free(valid->bounce_to);
3757         if (valid->envelope_from != NULL)       free(valid->envelope_from);
3758         free(valid);
3759 }
3760
3761
3762
3763 /*
3764  * message entry  -  mode 0 (normal)
3765  */
3766 void cmd_ent0(char *entargs)
3767 {
3768         int post = 0;
3769         char recp[SIZ];
3770         char cc[SIZ];
3771         char bcc[SIZ];
3772         char supplied_euid[128];
3773         int anon_flag = 0;
3774         int format_type = 0;
3775         char newusername[256];
3776         char newuseremail[256];
3777         struct CtdlMessage *msg;
3778         int anonymous = 0;
3779         char errmsg[SIZ];
3780         int err = 0;
3781         struct recptypes *valid = NULL;
3782         struct recptypes *valid_to = NULL;
3783         struct recptypes *valid_cc = NULL;
3784         struct recptypes *valid_bcc = NULL;
3785         char subject[SIZ];
3786         int subject_required = 0;
3787         int do_confirm = 0;
3788         long msgnum;
3789         int i, j;
3790         char buf[256];
3791         int newuseremail_ok = 0;
3792         char references[SIZ];
3793         char *ptr;
3794
3795         unbuffer_output();
3796
3797         post = extract_int(entargs, 0);
3798         extract_token(recp, entargs, 1, '|', sizeof recp);
3799         anon_flag = extract_int(entargs, 2);
3800         format_type = extract_int(entargs, 3);
3801         extract_token(subject, entargs, 4, '|', sizeof subject);
3802         extract_token(newusername, entargs, 5, '|', sizeof newusername);
3803         do_confirm = extract_int(entargs, 6);
3804         extract_token(cc, entargs, 7, '|', sizeof cc);
3805         extract_token(bcc, entargs, 8, '|', sizeof bcc);
3806         switch(CC->room.QRdefaultview) {
3807                 case VIEW_NOTES:
3808                 case VIEW_WIKI:
3809                         extract_token(supplied_euid, entargs, 9, '|', sizeof supplied_euid);
3810                         break;
3811                 default:
3812                         supplied_euid[0] = 0;
3813                         break;
3814         }
3815         extract_token(newuseremail, entargs, 10, '|', sizeof newuseremail);
3816         extract_token(references, entargs, 11, '|', sizeof references);
3817         for (ptr=references; *ptr != 0; ++ptr) {
3818                 if (*ptr == '!') *ptr = '|';
3819         }
3820
3821         /* first check to make sure the request is valid. */
3822
3823         err = CtdlDoIHavePermissionToPostInThisRoom(errmsg, sizeof errmsg, NULL, POST_LOGGED_IN);
3824         if (err)
3825         {
3826                 cprintf("%d %s\n", err, errmsg);
3827                 return;
3828         }
3829
3830         /* Check some other permission type things. */
3831
3832         if (IsEmptyStr(newusername)) {
3833                 strcpy(newusername, CC->user.fullname);
3834         }
3835         if (  (CC->user.axlevel < 6)
3836            && (strcasecmp(newusername, CC->user.fullname))
3837            && (strcasecmp(newusername, CC->cs_inet_fn))
3838         ) {
3839                 cprintf("%d You don't have permission to author messages as '%s'.\n",
3840                         ERROR + HIGHER_ACCESS_REQUIRED,
3841                         newusername
3842                 );
3843                 return;
3844         }
3845
3846
3847         if (IsEmptyStr(newuseremail)) {
3848                 newuseremail_ok = 1;
3849         }
3850
3851         if (!IsEmptyStr(newuseremail)) {
3852                 if (!strcasecmp(newuseremail, CC->cs_inet_email)) {
3853                         newuseremail_ok = 1;
3854                 }
3855                 else if (!IsEmptyStr(CC->cs_inet_other_emails)) {
3856                         j = num_tokens(CC->cs_inet_other_emails, '|');
3857                         for (i=0; i<j; ++i) {
3858                                 extract_token(buf, CC->cs_inet_other_emails, i, '|', sizeof buf);
3859                                 if (!strcasecmp(newuseremail, buf)) {
3860                                         newuseremail_ok = 1;
3861                                 }
3862                         }
3863                 }
3864         }
3865
3866         if (!newuseremail_ok) {
3867                 cprintf("%d You don't have permission to author messages as '%s'.\n",
3868                         ERROR + HIGHER_ACCESS_REQUIRED,
3869                         newuseremail
3870                 );
3871                 return;
3872         }
3873
3874         CC->cs_flags |= CS_POSTING;
3875
3876         /* In mailbox rooms we have to behave a little differently --
3877          * make sure the user has specified at least one recipient.  Then
3878          * validate the recipient(s).  We do this for the Mail> room, as
3879          * well as any room which has the "Mailbox" view set.
3880          */
3881
3882         if (  ( (CC->room.QRflags & QR_MAILBOX) && (!strcasecmp(&CC->room.QRname[11], MAILROOM)) )
3883            || ( (CC->room.QRflags & QR_MAILBOX) && (CC->curr_view == VIEW_MAILBOX) )
3884         ) {
3885                 if (CC->user.axlevel < 2) {
3886                         strcpy(recp, "sysop");
3887                         strcpy(cc, "");
3888                         strcpy(bcc, "");
3889                 }
3890
3891                 valid_to = validate_recipients(recp, NULL, 0);
3892                 if (valid_to->num_error > 0) {
3893                         cprintf("%d %s\n", ERROR + NO_SUCH_USER, valid_to->errormsg);
3894                         free_recipients(valid_to);
3895                         return;
3896                 }
3897
3898                 valid_cc = validate_recipients(cc, NULL, 0);
3899                 if (valid_cc->num_error > 0) {
3900                         cprintf("%d %s\n", ERROR + NO_SUCH_USER, valid_cc->errormsg);
3901                         free_recipients(valid_to);
3902                         free_recipients(valid_cc);
3903                         return;
3904                 }
3905
3906                 valid_bcc = validate_recipients(bcc, NULL, 0);
3907                 if (valid_bcc->num_error > 0) {
3908                         cprintf("%d %s\n", ERROR + NO_SUCH_USER, valid_bcc->errormsg);
3909                         free_recipients(valid_to);
3910                         free_recipients(valid_cc);
3911                         free_recipients(valid_bcc);
3912                         return;
3913                 }
3914
3915                 /* Recipient required, but none were specified */
3916                 if ( (valid_to->num_error < 0) && (valid_cc->num_error < 0) && (valid_bcc->num_error < 0) ) {
3917                         free_recipients(valid_to);
3918                         free_recipients(valid_cc);
3919                         free_recipients(valid_bcc);
3920                         cprintf("%d At least one recipient is required.\n", ERROR + NO_SUCH_USER);
3921                         return;
3922                 }
3923
3924                 if (valid_to->num_internet + valid_cc->num_internet + valid_bcc->num_internet > 0) {
3925                         if (CtdlCheckInternetMailPermission(&CC->user)==0) {
3926                                 cprintf("%d You do not have permission "
3927                                         "to send Internet mail.\n",
3928                                         ERROR + HIGHER_ACCESS_REQUIRED);
3929                                 free_recipients(valid_to);
3930                                 free_recipients(valid_cc);
3931                                 free_recipients(valid_bcc);
3932                                 return;
3933                         }
3934                 }
3935
3936                 if ( ( (valid_to->num_internet + valid_to->num_ignet + valid_cc->num_internet + valid_cc->num_ignet + valid_bcc->num_internet + valid_bcc->num_ignet) > 0)
3937                    && (CC->user.axlevel < 4) ) {
3938                         cprintf("%d Higher access required for network mail.\n",
3939                                 ERROR + HIGHER_ACCESS_REQUIRED);
3940                         free_recipients(valid_to);
3941                         free_recipients(valid_cc);
3942                         free_recipients(valid_bcc);
3943                         return;
3944                 }
3945
3946                 if ((RESTRICT_INTERNET == 1)
3947                     && (valid_to->num_internet + valid_cc->num_internet + valid_bcc->num_internet > 0)
3948                     && ((CC->user.flags & US_INTERNET) == 0)
3949                     && (!CC->internal_pgm)) {
3950                         cprintf("%d You don't have access to Internet mail.\n",
3951                                 ERROR + HIGHER_ACCESS_REQUIRED);
3952                         free_recipients(valid_to);
3953                         free_recipients(valid_cc);
3954                         free_recipients(valid_bcc);
3955                         return;
3956                 }
3957
3958         }
3959
3960         /* Is this a room which has anonymous-only or anonymous-option? */
3961         anonymous = MES_NORMAL;
3962         if (CC->room.QRflags & QR_ANONONLY) {
3963                 anonymous = MES_ANONONLY;
3964         }
3965         if (CC->room.QRflags & QR_ANONOPT) {
3966                 if (anon_flag == 1) {   /* only if the user requested it */
3967                         anonymous = MES_ANONOPT;
3968                 }
3969         }
3970
3971         if ((CC->room.QRflags & QR_MAILBOX) == 0) {
3972                 recp[0] = 0;
3973         }
3974
3975         /* Recommend to the client that the use of a message subject is
3976          * strongly recommended in this room, if either the SUBJECTREQ flag
3977          * is set, or if there is one or more Internet email recipients.
3978          */
3979         if (CC->room.QRflags2 & QR2_SUBJECTREQ) subject_required = 1;
3980         if ((valid_to)  && (valid_to->num_internet > 0))        subject_required = 1;
3981         if ((valid_cc)  && (valid_cc->num_internet > 0))        subject_required = 1;
3982         if ((valid_bcc) && (valid_bcc->num_internet > 0))       subject_required = 1;
3983
3984         /* If we're only checking the validity of the request, return
3985          * success without creating the message.
3986          */
3987         if (post == 0) {
3988                 cprintf("%d %s|%d\n", CIT_OK,
3989                         ((valid_to != NULL) ? valid_to->display_recp : ""),
3990                         subject_required);
3991                 free_recipients(valid_to);
3992                 free_recipients(valid_cc);
3993                 free_recipients(valid_bcc);
3994                 return;
3995         }
3996
3997         /* We don't need these anymore because we'll do it differently below */
3998         free_recipients(valid_to);
3999         free_recipients(valid_cc);
4000         free_recipients(valid_bcc);
4001
4002         /* Read in the message from the client. */
4003         if (do_confirm) {
4004                 cprintf("%d send message\n", START_CHAT_MODE);
4005         } else {
4006                 cprintf("%d send message\n", SEND_LISTING);
4007         }
4008
4009         msg = CtdlMakeMessage(&CC->user, recp, cc,
4010                 CC->room.QRname, anonymous, format_type,
4011                 newusername, newuseremail, subject,
4012                 ((!IsEmptyStr(supplied_euid)) ? supplied_euid : NULL),
4013                 NULL, references);
4014
4015         /* Put together one big recipients struct containing to/cc/bcc all in
4016          * one.  This is for the envelope.
4017          */
4018         char *all_recps = malloc(SIZ * 3);
4019         strcpy(all_recps, recp);
4020         if (!IsEmptyStr(cc)) {
4021                 if (!IsEmptyStr(all_recps)) {
4022                         strcat(all_recps, ",");
4023                 }
4024                 strcat(all_recps, cc);
4025         }
4026         if (!IsEmptyStr(bcc)) {
4027                 if (!IsEmptyStr(all_recps)) {
4028                         strcat(all_recps, ",");
4029                 }
4030                 strcat(all_recps, bcc);
4031         }
4032         if (!IsEmptyStr(all_recps)) {
4033                 valid = validate_recipients(all_recps, NULL, 0);
4034         }
4035         else {
4036                 valid = NULL;
4037         }
4038         free(all_recps);
4039
4040         if (msg != NULL) {
4041                 msgnum = CtdlSubmitMsg(msg, valid, "", QP_EADDR);
4042
4043                 if (do_confirm) {
4044                         cprintf("%ld\n", msgnum);
4045                         if (msgnum >= 0L) {
4046                                 cprintf("Message accepted.\n");
4047                         }
4048                         else {
4049                                 cprintf("Internal error.\n");
4050                         }
4051                         if (msg->cm_fields['E'] != NULL) {
4052                                 cprintf("%s\n", msg->cm_fields['E']);
4053                         } else {
4054                                 cprintf("\n");
4055                         }
4056                         cprintf("000\n");
4057                 }
4058
4059                 CtdlFreeMessage(msg);
4060         }
4061         if (valid != NULL) {
4062                 free_recipients(valid);
4063         }
4064         return;
4065 }
4066
4067
4068
4069 /*
4070  * API function to delete messages which match a set of criteria
4071  * (returns the actual number of messages deleted)
4072  */
4073 int CtdlDeleteMessages(char *room_name,         /* which room */
4074                         long *dmsgnums,         /* array of msg numbers to be deleted */
4075                         int num_dmsgnums,       /* number of msgs to be deleted, or 0 for "any" */
4076                         char *content_type      /* or "" for any.  regular expressions expected. */
4077 )
4078 {
4079         struct ctdlroom qrbuf;
4080         struct cdbdata *cdbfr;
4081         long *msglist = NULL;
4082         long *dellist = NULL;
4083         int num_msgs = 0;
4084         int i, j;
4085         int num_deleted = 0;
4086         int delete_this;
4087         struct MetaData smi;
4088         regex_t re;
4089         regmatch_t pm;
4090         int need_to_free_re = 0;
4091
4092         if (content_type) if (!IsEmptyStr(content_type)) {
4093                 regcomp(&re, content_type, 0);
4094                 need_to_free_re = 1;
4095         }
4096         CtdlLogPrintf(CTDL_DEBUG, "CtdlDeleteMessages(%s, %d msgs, %s)\n",
4097                 room_name, num_dmsgnums, content_type);
4098
4099         /* get room record, obtaining a lock... */
4100         if (CtdlGetRoomLock(&qrbuf, room_name) != 0) {
4101                 CtdlLogPrintf(CTDL_ERR, "CtdlDeleteMessages(): Room <%s> not found\n",
4102                         room_name);
4103                 if (need_to_free_re) regfree(&re);
4104                 return (0);     /* room not found */
4105         }
4106         cdbfr = cdb_fetch(CDB_MSGLISTS, &qrbuf.QRnumber, sizeof(long));
4107
4108         if (cdbfr != NULL) {
4109                 dellist = malloc(cdbfr->len);
4110                 msglist = (long *) cdbfr->ptr;
4111                 cdbfr->ptr = NULL;      /* CtdlDeleteMessages() now owns this memory */
4112                 num_msgs = cdbfr->len / sizeof(long);
4113                 cdb_free(cdbfr);
4114         }
4115         if (num_msgs > 0) {
4116                 for (i = 0; i < num_msgs; ++i) {
4117                         delete_this = 0x00;
4118
4119                         /* Set/clear a bit for each criterion */
4120
4121                         /* 0 messages in the list or a null list means that we are
4122                          * interested in deleting any messages which meet the other criteria.
4123                          */
4124                         if ((num_dmsgnums == 0) || (dmsgnums == NULL)) {
4125                                 delete_this |= 0x01;
4126                         }
4127                         else {
4128                                 for (j=0; j<num_dmsgnums; ++j) {
4129                                         if (msglist[i] == dmsgnums[j]) {
4130                                                 delete_this |= 0x01;
4131                                         }
4132                                 }
4133                         }
4134
4135                         if (IsEmptyStr(content_type)) {
4136                                 delete_this |= 0x02;
4137                         } else {
4138                                 GetMetaData(&smi, msglist[i]);
4139                                 if (regexec(&re, smi.meta_content_type, 1, &pm, 0) == 0) {
4140                                         delete_this |= 0x02;
4141                                 }
4142                         }
4143
4144                         /* Delete message only if all bits are set */
4145                         if (delete_this == 0x03) {
4146                                 dellist[num_deleted++] = msglist[i];
4147                                 msglist[i] = 0L;
4148                         }
4149                 }
4150
4151                 num_msgs = sort_msglist(msglist, num_msgs);
4152                 cdb_store(CDB_MSGLISTS, &qrbuf.QRnumber, (int)sizeof(long),
4153                           msglist, (int)(num_msgs * sizeof(long)));
4154
4155                 qrbuf.QRhighest = msglist[num_msgs - 1];
4156         }
4157         CtdlPutRoomLock(&qrbuf);
4158
4159         /* Go through the messages we pulled out of the index, and decrement
4160          * their reference counts by 1.  If this is the only room the message
4161          * was in, the reference count will reach zero and the message will
4162          * automatically be deleted from the database.  We do this in a
4163          * separate pass because there might be plug-in hooks getting called,
4164          * and we don't want that happening during an S_ROOMS critical
4165          * section.
4166          */
4167         if (num_deleted) for (i=0; i<num_deleted; ++i) {
4168                 PerformDeleteHooks(qrbuf.QRname, dellist[i]);
4169                 AdjRefCount(dellist[i], -1);
4170         }
4171
4172         /* Now free the memory we used, and go away. */
4173         if (msglist != NULL) free(msglist);
4174         if (dellist != NULL) free(dellist);
4175         CtdlLogPrintf(CTDL_DEBUG, "%d message(s) deleted.\n", num_deleted);
4176         if (need_to_free_re) regfree(&re);
4177         return (num_deleted);
4178 }
4179
4180
4181
4182 /*
4183  * Check whether the current user has permission to delete messages from
4184  * the current room (returns 1 for yes, 0 for no)
4185  */
4186 int CtdlDoIHavePermissionToDeleteMessagesFromThisRoom(void) {
4187         int ra;
4188         CtdlRoomAccess(&CC->room, &CC->user, &ra, NULL);
4189         if (ra & UA_DELETEALLOWED) return(1);
4190         return(0);
4191 }
4192
4193
4194
4195
4196 /*
4197  * Delete message from current room
4198  */
4199 void cmd_dele(char *args)
4200 {
4201         int num_deleted;
4202         int i;
4203         char msgset[SIZ];
4204         char msgtok[32];
4205         long *msgs;
4206         int num_msgs = 0;
4207
4208         extract_token(msgset, args, 0, '|', sizeof msgset);
4209         num_msgs = num_tokens(msgset, ',');
4210         if (num_msgs < 1) {
4211                 cprintf("%d Nothing to do.\n", CIT_OK);
4212                 return;
4213         }
4214
4215         if (CtdlDoIHavePermissionToDeleteMessagesFromThisRoom() == 0) {
4216                 cprintf("%d Higher access required.\n",
4217                         ERROR + HIGHER_ACCESS_REQUIRED);
4218                 return;
4219         }
4220
4221         /*
4222          * Build our message set to be moved/copied
4223          */
4224         msgs = malloc(num_msgs * sizeof(long));
4225         for (i=0; i<num_msgs; ++i) {
4226                 extract_token(msgtok, msgset, i, ',', sizeof msgtok);
4227                 msgs[i] = atol(msgtok);
4228         }
4229
4230         num_deleted = CtdlDeleteMessages(CC->room.QRname, msgs, num_msgs, "");
4231         free(msgs);
4232
4233         if (num_deleted) {
4234                 cprintf("%d %d message%s deleted.\n", CIT_OK,
4235                         num_deleted, ((num_deleted != 1) ? "s" : ""));
4236         } else {
4237                 cprintf("%d Message not found.\n", ERROR + MESSAGE_NOT_FOUND);
4238         }
4239 }
4240
4241
4242
4243
4244 /*
4245  * move or copy a message to another room
4246  */
4247 void cmd_move(char *args)
4248 {
4249         char msgset[SIZ];
4250         char msgtok[32];
4251         long *msgs;
4252         int num_msgs = 0;
4253
4254         char targ[ROOMNAMELEN];
4255         struct ctdlroom qtemp;
4256         int err;
4257         int is_copy = 0;
4258         int ra;
4259         int permit = 0;
4260         int i;
4261
4262         extract_token(msgset, args, 0, '|', sizeof msgset);
4263         num_msgs = num_tokens(msgset, ',');
4264         if (num_msgs < 1) {
4265                 cprintf("%d Nothing to do.\n", CIT_OK);
4266                 return;
4267         }
4268
4269         extract_token(targ, args, 1, '|', sizeof targ);
4270         convert_room_name_macros(targ, sizeof targ);
4271         targ[ROOMNAMELEN - 1] = 0;
4272         is_copy = extract_int(args, 2);
4273
4274         if (CtdlGetRoom(&qtemp, targ) != 0) {
4275                 cprintf("%d '%s' does not exist.\n", ERROR + ROOM_NOT_FOUND, targ);
4276                 return;
4277         }
4278
4279         if (!strcasecmp(qtemp.QRname, CC->room.QRname)) {
4280                 cprintf("%d Source and target rooms are the same.\n", ERROR + ALREADY_EXISTS);
4281                 return;
4282         }
4283
4284         getuser(&CC->user, CC->curr_user);
4285         CtdlRoomAccess(&qtemp, &CC->user, &ra, NULL);
4286
4287         /* Check for permission to perform this operation.
4288          * Remember: "CC->room" is source, "qtemp" is target.
4289          */
4290         permit = 0;
4291
4292         /* Aides can move/copy */
4293         if (CC->user.axlevel >= 6) permit = 1;
4294
4295         /* Room aides can move/copy */
4296         if (CC->user.usernum == CC->room.QRroomaide) permit = 1;
4297
4298         /* Permit move/copy from personal rooms */
4299         if ((CC->room.QRflags & QR_MAILBOX)
4300            && (qtemp.QRflags & QR_MAILBOX)) permit = 1;
4301
4302         /* Permit only copy from public to personal room */
4303         if ( (is_copy)
4304            && (!(CC->room.QRflags & QR_MAILBOX))
4305            && (qtemp.QRflags & QR_MAILBOX)) permit = 1;
4306
4307         /* Permit message removal from collaborative delete rooms */
4308         if (CC->room.QRflags2 & QR2_COLLABDEL) permit = 1;
4309
4310         /* Users allowed to post into the target room may move into it too. */
4311         if ((CC->room.QRflags & QR_MAILBOX) &&
4312             (qtemp.QRflags & UA_POSTALLOWED))  permit = 1;
4313
4314         /* User must have access to target room */
4315         if (!(ra & UA_KNOWN))  permit = 0;
4316
4317         if (!permit) {
4318                 cprintf("%d Higher access required.\n",
4319                         ERROR + HIGHER_ACCESS_REQUIRED);
4320                 return;
4321         }
4322
4323         /*
4324          * Build our message set to be moved/copied
4325          */
4326         msgs = malloc(num_msgs * sizeof(long));
4327         for (i=0; i<num_msgs; ++i) {
4328                 extract_token(msgtok, msgset, i, ',', sizeof msgtok);
4329                 msgs[i] = atol(msgtok);
4330         }
4331
4332         /*
4333          * Do the copy
4334          */
4335         err = CtdlSaveMsgPointersInRoom(targ, msgs, num_msgs, 1, NULL);
4336         if (err != 0) {
4337                 cprintf("%d Cannot store message(s) in %s: error %d\n",
4338                         err, targ, err);
4339                 free(msgs);
4340                 return;
4341         }
4342
4343         /* Now delete the message from the source room,
4344          * if this is a 'move' rather than a 'copy' operation.
4345          */
4346         if (is_copy == 0) {
4347                 CtdlDeleteMessages(CC->room.QRname, msgs, num_msgs, "");
4348         }
4349         free(msgs);
4350
4351         cprintf("%d Message(s) %s.\n", CIT_OK, (is_copy ? "copied" : "moved") );
4352 }
4353
4354
4355
4356 /*
4357  * GetMetaData()  -  Get the supplementary record for a message
4358  */
4359 void GetMetaData(struct MetaData *smibuf, long msgnum)
4360 {
4361
4362         struct cdbdata *cdbsmi;
4363         long TheIndex;
4364
4365         memset(smibuf, 0, sizeof(struct MetaData));
4366         smibuf->meta_msgnum = msgnum;
4367         smibuf->meta_refcount = 1;      /* Default reference count is 1 */
4368
4369         /* Use the negative of the message number for its supp record index */
4370         TheIndex = (0L - msgnum);
4371
4372         cdbsmi = cdb_fetch(CDB_MSGMAIN, &TheIndex, sizeof(long));
4373         if (cdbsmi == NULL) {
4374                 return;         /* record not found; go with defaults */
4375         }
4376         memcpy(smibuf, cdbsmi->ptr,
4377                ((cdbsmi->len > sizeof(struct MetaData)) ?
4378                 sizeof(struct MetaData) : cdbsmi->len));
4379         cdb_free(cdbsmi);
4380         return;
4381 }
4382
4383
4384 /*
4385  * PutMetaData()  -  (re)write supplementary record for a message
4386  */
4387 void PutMetaData(struct MetaData *smibuf)
4388 {
4389         long TheIndex;
4390
4391         /* Use the negative of the message number for the metadata db index */
4392         TheIndex = (0L - smibuf->meta_msgnum);
4393
4394         cdb_store(CDB_MSGMAIN,
4395                   &TheIndex, (int)sizeof(long),
4396                   smibuf, (int)sizeof(struct MetaData));
4397
4398 }
4399
4400 /*
4401  * AdjRefCount  -  submit an adjustment to the reference count for a message.
4402  *                 (These are just queued -- we actually process them later.)
4403  */
4404 void AdjRefCount(long msgnum, int incr)
4405 {
4406         struct arcq new_arcq;
4407         int rv = 0;
4408
4409         begin_critical_section(S_SUPPMSGMAIN);
4410         if (arcfp == NULL) {
4411                 arcfp = fopen(file_arcq, "ab+");
4412         }
4413         end_critical_section(S_SUPPMSGMAIN);
4414
4415         /* msgnum < 0 means that we're trying to close the file */
4416         if (msgnum < 0) {
4417                 CtdlLogPrintf(CTDL_DEBUG, "Closing the AdjRefCount queue file\n");
4418                 begin_critical_section(S_SUPPMSGMAIN);
4419                 if (arcfp != NULL) {
4420                         fclose(arcfp);
4421                         arcfp = NULL;
4422                 }
4423                 end_critical_section(S_SUPPMSGMAIN);
4424                 return;
4425         }
4426
4427         /*
4428          * If we can't open the queue, perform the operation synchronously.
4429          */
4430         if (arcfp == NULL) {
4431                 TDAP_AdjRefCount(msgnum, incr);
4432                 return;
4433         }
4434
4435         new_arcq.arcq_msgnum = msgnum;
4436         new_arcq.arcq_delta = incr;
4437         rv = fwrite(&new_arcq, sizeof(struct arcq), 1, arcfp);
4438         fflush(arcfp);
4439
4440         return;
4441 }
4442
4443
4444 /*
4445  * TDAP_ProcessAdjRefCountQueue()
4446  *
4447  * Process the queue of message count adjustments that was created by calls
4448  * to AdjRefCount() ... by reading the queue and calling TDAP_AdjRefCount()
4449  * for each one.  This should be an "off hours" operation.
4450  */
4451 int TDAP_ProcessAdjRefCountQueue(void)
4452 {
4453         char file_arcq_temp[PATH_MAX];
4454         int r;
4455         FILE *fp;
4456         struct arcq arcq_rec;
4457         int num_records_processed = 0;
4458
4459         snprintf(file_arcq_temp, sizeof file_arcq_temp, "%s.%04x", file_arcq, rand());
4460
4461         begin_critical_section(S_SUPPMSGMAIN);
4462         if (arcfp != NULL) {
4463                 fclose(arcfp);
4464                 arcfp = NULL;
4465         }
4466
4467         r = link(file_arcq, file_arcq_temp);
4468         if (r != 0) {
4469                 CtdlLogPrintf(CTDL_CRIT, "%s: %s\n", file_arcq_temp, strerror(errno));
4470                 end_critical_section(S_SUPPMSGMAIN);
4471                 return(num_records_processed);
4472         }
4473
4474         unlink(file_arcq);
4475         end_critical_section(S_SUPPMSGMAIN);
4476
4477         fp = fopen(file_arcq_temp, "rb");
4478         if (fp == NULL) {
4479                 CtdlLogPrintf(CTDL_CRIT, "%s: %s\n", file_arcq_temp, strerror(errno));
4480                 return(num_records_processed);
4481         }
4482
4483         while (fread(&arcq_rec, sizeof(struct arcq), 1, fp) == 1) {
4484                 TDAP_AdjRefCount(arcq_rec.arcq_msgnum, arcq_rec.arcq_delta);
4485                 ++num_records_processed;
4486         }
4487
4488         fclose(fp);
4489         r = unlink(file_arcq_temp);
4490         if (r != 0) {
4491                 CtdlLogPrintf(CTDL_CRIT, "%s: %s\n", file_arcq_temp, strerror(errno));
4492         }
4493
4494         return(num_records_processed);
4495 }
4496
4497
4498
4499 /*
4500  * TDAP_AdjRefCount  -  adjust the reference count for a message.
4501  *                      This one does it "for real" because it's called by
4502  *                      the autopurger function that processes the queue
4503  *                      created by AdjRefCount().   If a message's reference
4504  *                      count becomes zero, we also delete the message from
4505  *                      disk and de-index it.
4506  */
4507 void TDAP_AdjRefCount(long msgnum, int incr)
4508 {
4509
4510         struct MetaData smi;
4511         long delnum;
4512
4513         /* This is a *tight* critical section; please keep it that way, as
4514          * it may get called while nested in other critical sections.
4515          * Complicating this any further will surely cause deadlock!
4516          */
4517         begin_critical_section(S_SUPPMSGMAIN);
4518         GetMetaData(&smi, msgnum);
4519         smi.meta_refcount += incr;
4520         PutMetaData(&smi);
4521         end_critical_section(S_SUPPMSGMAIN);
4522         CtdlLogPrintf(CTDL_DEBUG, "msg %ld ref count delta %+d, is now %d\n",
4523                 msgnum, incr, smi.meta_refcount);
4524
4525         /* If the reference count is now zero, delete the message
4526          * (and its supplementary record as well).
4527          */
4528         if (smi.meta_refcount == 0) {
4529                 CtdlLogPrintf(CTDL_DEBUG, "Deleting message <%ld>\n", msgnum);
4530
4531                 /* Call delete hooks with NULL room to show it has gone altogether */
4532                 PerformDeleteHooks(NULL, msgnum);
4533
4534                 /* Remove from message base */
4535                 delnum = msgnum;
4536                 cdb_delete(CDB_MSGMAIN, &delnum, (int)sizeof(long));
4537                 cdb_delete(CDB_BIGMSGS, &delnum, (int)sizeof(long));
4538
4539                 /* Remove metadata record */
4540                 delnum = (0L - msgnum);
4541                 cdb_delete(CDB_MSGMAIN, &delnum, (int)sizeof(long));
4542         }
4543
4544 }
4545
4546 /*
4547  * Write a generic object to this room
4548  *
4549  * Note: this could be much more efficient.  Right now we use two temporary
4550  * files, and still pull the message into memory as with all others.
4551  */
4552 void CtdlWriteObject(char *req_room,                    /* Room to stuff it in */
4553                         char *content_type,             /* MIME type of this object */
4554                         char *raw_message,              /* Data to be written */
4555                         off_t raw_length,               /* Size of raw_message */
4556                         struct ctdluser *is_mailbox,    /* Mailbox room? */
4557                         int is_binary,                  /* Is encoding necessary? */
4558                         int is_unique,                  /* Del others of this type? */
4559                         unsigned int flags              /* Internal save flags */
4560                         )
4561 {
4562
4563         struct ctdlroom qrbuf;
4564         char roomname[ROOMNAMELEN];
4565         struct CtdlMessage *msg;
4566         char *encoded_message = NULL;
4567
4568         if (is_mailbox != NULL) {
4569                 MailboxName(roomname, sizeof roomname, is_mailbox, req_room);
4570         }
4571         else {
4572                 safestrncpy(roomname, req_room, sizeof(roomname));
4573         }
4574
4575         CtdlLogPrintf(CTDL_DEBUG, "Raw length is %ld\n", (long)raw_length);
4576
4577         if (is_binary) {
4578                 encoded_message = malloc((size_t) (((raw_length * 134) / 100) + 4096 ) );
4579         }
4580         else {
4581                 encoded_message = malloc((size_t)(raw_length + 4096));
4582         }
4583
4584         sprintf(encoded_message, "Content-type: %s\n", content_type);
4585
4586         if (is_binary) {
4587                 sprintf(&encoded_message[strlen(encoded_message)],
4588                         "Content-transfer-encoding: base64\n\n"
4589                 );
4590         }
4591         else {
4592                 sprintf(&encoded_message[strlen(encoded_message)],
4593                         "Content-transfer-encoding: 7bit\n\n"
4594                 );
4595         }
4596
4597         if (is_binary) {
4598                 CtdlEncodeBase64(
4599                         &encoded_message[strlen(encoded_message)],
4600                         raw_message,
4601                         (int)raw_length,
4602                         0
4603                 );
4604         }
4605         else {
4606                 memcpy(
4607                         &encoded_message[strlen(encoded_message)],
4608                         raw_message,
4609                         (int)(raw_length+1)
4610                 );
4611         }
4612
4613         CtdlLogPrintf(CTDL_DEBUG, "Allocating\n");
4614         msg = malloc(sizeof(struct CtdlMessage));
4615         memset(msg, 0, sizeof(struct CtdlMessage));
4616         msg->cm_magic = CTDLMESSAGE_MAGIC;
4617         msg->cm_anon_type = MES_NORMAL;
4618         msg->cm_format_type = 4;
4619         msg->cm_fields['A'] = strdup(CC->user.fullname);
4620         msg->cm_fields['O'] = strdup(req_room);
4621         msg->cm_fields['N'] = strdup(config.c_nodename);
4622         msg->cm_fields['H'] = strdup(config.c_humannode);
4623         msg->cm_flags = flags;
4624
4625         msg->cm_fields['M'] = encoded_message;
4626
4627         /* Create the requested room if we have to. */
4628         if (CtdlGetRoom(&qrbuf, roomname) != 0) {
4629                 CtdlCreateRoom(roomname,
4630                         ( (is_mailbox != NULL) ? 5 : 3 ),
4631                         "", 0, 1, 0, VIEW_BBS);
4632         }
4633         /* If the caller specified this object as unique, delete all
4634          * other objects of this type that are currently in the room.
4635          */
4636         if (is_unique) {
4637                 CtdlLogPrintf(CTDL_DEBUG, "Deleted %d other msgs of this type\n",
4638                         CtdlDeleteMessages(roomname, NULL, 0, content_type)
4639                 );
4640         }
4641         /* Now write the data */
4642         CtdlSubmitMsg(msg, NULL, roomname, 0);
4643         CtdlFreeMessage(msg);
4644 }
4645
4646
4647
4648
4649
4650
4651 void CtdlGetSysConfigBackend(long msgnum, void *userdata) {
4652         config_msgnum = msgnum;
4653 }
4654
4655
4656 char *CtdlGetSysConfig(char *sysconfname) {
4657         char hold_rm[ROOMNAMELEN];
4658         long msgnum;
4659         char *conf;
4660         struct CtdlMessage *msg;
4661         char buf[SIZ];
4662
4663         strcpy(hold_rm, CC->room.QRname);
4664         if (CtdlGetRoom(&CC->room, SYSCONFIGROOM) != 0) {
4665                 CtdlGetRoom(&CC->room, hold_rm);
4666                 return NULL;
4667         }
4668
4669
4670         /* We want the last (and probably only) config in this room */
4671         begin_critical_section(S_CONFIG);
4672         config_msgnum = (-1L);
4673         CtdlForEachMessage(MSGS_LAST, 1, NULL, sysconfname, NULL,
4674                 CtdlGetSysConfigBackend, NULL);
4675         msgnum = config_msgnum;
4676         end_critical_section(S_CONFIG);
4677
4678         if (msgnum < 0L) {
4679                 conf = NULL;
4680         }
4681         else {
4682                 msg = CtdlFetchMessage(msgnum, 1);
4683                 if (msg != NULL) {
4684                         conf = strdup(msg->cm_fields['M']);
4685                         CtdlFreeMessage(msg);
4686                 }
4687                 else {
4688                         conf = NULL;
4689                 }
4690         }
4691
4692         CtdlGetRoom(&CC->room, hold_rm);
4693
4694         if (conf != NULL) do {
4695                 extract_token(buf, conf, 0, '\n', sizeof buf);
4696                 strcpy(conf, &conf[strlen(buf)+1]);
4697         } while ( (!IsEmptyStr(conf)) && (!IsEmptyStr(buf)) );
4698
4699         return(conf);
4700 }
4701
4702
4703 void CtdlPutSysConfig(char *sysconfname, char *sysconfdata) {
4704         CtdlWriteObject(SYSCONFIGROOM, sysconfname, sysconfdata, (strlen(sysconfdata)+1), NULL, 0, 1, 0);
4705 }
4706
4707
4708 /*
4709  * Determine whether a given Internet address belongs to the current user
4710  */
4711 int CtdlIsMe(char *addr, int addr_buf_len)
4712 {
4713         struct recptypes *recp;
4714         int i;
4715
4716         recp = validate_recipients(addr, NULL, 0);
4717         if (recp == NULL) return(0);
4718
4719         if (recp->num_local == 0) {
4720                 free_recipients(recp);
4721                 return(0);
4722         }
4723
4724         for (i=0; i<recp->num_local; ++i) {
4725                 extract_token(addr, recp->recp_local, i, '|', addr_buf_len);
4726                 if (!strcasecmp(addr, CC->user.fullname)) {
4727                         free_recipients(recp);
4728                         return(1);
4729                 }
4730         }
4731
4732         free_recipients(recp);
4733         return(0);
4734 }
4735
4736
4737 /*
4738  * Citadel protocol command to do the same
4739  */
4740 void cmd_isme(char *argbuf) {
4741         char addr[256];
4742
4743         if (CtdlAccessCheck(ac_logged_in)) return;
4744         extract_token(addr, argbuf, 0, '|', sizeof addr);
4745
4746         if (CtdlIsMe(addr, sizeof addr)) {
4747                 cprintf("%d %s\n", CIT_OK, addr);
4748         }
4749         else {
4750                 cprintf("%d Not you.\n", ERROR + ILLEGAL_VALUE);
4751         }
4752
4753 }
4754
4755
4756 /*****************************************************************************/
4757 /*                      MODULE INITIALIZATION STUFF                          */
4758 /*****************************************************************************/
4759
4760 CTDL_MODULE_INIT(msgbase)
4761 {
4762         CtdlRegisterProtoHook(cmd_msgs, "MSGS", "Output a list of messages in the current room");
4763         CtdlRegisterProtoHook(cmd_msg0, "MSG0", "Output a message in plain text format");
4764         CtdlRegisterProtoHook(cmd_msg2, "MSG2", "Output a message in RFC822 format");
4765         CtdlRegisterProtoHook(cmd_msg3, "MSG3", "Output a message in raw format (deprecated)");
4766         CtdlRegisterProtoHook(cmd_msg4, "MSG4", "Output a message in the client's preferred format");
4767         CtdlRegisterProtoHook(cmd_msgp, "MSGP", "Select preferred format for MSG4 output");
4768         CtdlRegisterProtoHook(cmd_opna, "OPNA", "Open an attachment for download");
4769         CtdlRegisterProtoHook(cmd_dlat, "DLAT", "Download an attachment");
4770         CtdlRegisterProtoHook(cmd_ent0, "ENT0", "Enter a message");
4771         CtdlRegisterProtoHook(cmd_dele, "DELE", "Delete a message");
4772         CtdlRegisterProtoHook(cmd_move, "MOVE", "Move or copy a message to another room");
4773         CtdlRegisterProtoHook(cmd_isme, "ISME", "Determine whether an email address belongs to a user");
4774
4775         /* return our Subversion id for the Log */
4776         return "$Id$";
4777 }