citadel/modules/imap/imap_fetch.c

   1 /*
   2  * $Id$
   3  *
   4  * Implements the FETCH command in IMAP.
   5  * This is a good example of the protocol's gratuitous complexity.
   6  *
   7  * Copyright (c) 2001-2009 by the citadel.org team
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 3 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  */
  23
  24
  25 #include "sysdep.h"
  26 #include <stdlib.h>
  27 #include <unistd.h>
  28 #include <stdio.h>
  29 #include <fcntl.h>
  30 #include <signal.h>
  31 #include <pwd.h>
  32 #include <errno.h>
  33 #include <sys/types.h>
  34
  35 #if TIME_WITH_SYS_TIME
  36 # include <sys/time.h>
  37 # include <time.h>
  38 #else
  39 # if HAVE_SYS_TIME_H
  40 #  include <sys/time.h>
  41 # else
  42 #  include <time.h>
  43 # endif
  44 #endif
  45
  46 #include <sys/wait.h>
  47 #include <ctype.h>
  48 #include <string.h>
  49 #include <limits.h>
  50 #include <libcitadel.h>
  51 #include "citadel.h"
  52 #include "server.h"
  53 #include "sysdep_decls.h"
  54 #include "citserver.h"
  55 #include "support.h"
  56 #include "config.h"
  57 #include "user_ops.h"
  58 #include "policy.h"
  59 #include "database.h"
  60 #include "msgbase.h"
  61 #include "internet_addressing.h"
  62 #include "imap_tools.h"
  63 #include "serv_imap.h"
  64 #include "imap_fetch.h"
  65 #include "genstamp.h"
  66 #include "ctdl_module.h"
  67
  68
  69
  70 /*
  71  * Individual field functions for imap_do_fetch_msg() ...
  72  */
  73
  74 void imap_fetch_uid(int seq) {
  75         cprintf("UID %ld", IMAP->msgids[seq-1]);
  76 }
  77
  78 void imap_fetch_flags(int seq) {
  79         int num_flags_printed = 0;
  80         cprintf("FLAGS (");
  81         if (IMAP->flags[seq] & IMAP_DELETED) {
  82                 if (num_flags_printed > 0) cprintf(" ");
  83                 cprintf("\\Deleted");
  84                 ++num_flags_printed;
  85         }
  86         if (IMAP->flags[seq] & IMAP_SEEN) {
  87                 if (num_flags_printed > 0) cprintf(" ");
  88                 cprintf("\\Seen");
  89                 ++num_flags_printed;
  90         }
  91         if (IMAP->flags[seq] & IMAP_ANSWERED) {
  92                 if (num_flags_printed > 0) cprintf(" ");
  93                 cprintf("\\Answered");
  94                 ++num_flags_printed;
  95         }
  96         if (IMAP->flags[seq] & IMAP_RECENT) {
  97                 if (num_flags_printed > 0) cprintf(" ");
  98                 cprintf("\\Recent");
  99                 ++num_flags_printed;
 100         }
 101         cprintf(")");
 102 }
 103
 104
 105 void imap_fetch_internaldate(struct CtdlMessage *msg) {
 106         char buf[SIZ];
 107         time_t msgdate;
 108
 109         if (!msg) return;
 110         if (msg->cm_fields['T'] != NULL) {
 111                 msgdate = atol(msg->cm_fields['T']);
 112         }
 113         else {
 114                 msgdate = time(NULL);
 115         }
 116
 117         datestring(buf, sizeof buf, msgdate, DATESTRING_IMAP);
 118         cprintf("INTERNALDATE \"%s\"", buf);
 119 }
 120
 121
 122 /*
 123  * Fetch RFC822-formatted messages.
 124  *
 125  * 'whichfmt' should be set to one of:
 126  *      "RFC822"        entire message
 127  *      "RFC822.HEADER" headers only (with trailing blank line)
 128  *      "RFC822.SIZE"   size of translated message
 129  *      "RFC822.TEXT"   body only (without leading blank line)
 130  */
 131 void imap_fetch_rfc822(long msgnum, const char *whichfmt) {
 132         char buf[SIZ];
 133         const char *ptr = NULL;
 134         size_t headers_size, text_size, total_size;
 135         size_t bytes_to_send = 0;
 136         struct MetaData smi;
 137         int need_to_rewrite_metadata = 0;
 138         int need_body = 0;
 139
 140         /* Determine whether this particular fetch operation requires
 141          * us to fetch the message body from disk.  If not, we can save
 142          * on some disk operations...
 143          */
 144         if ( (!strcasecmp(whichfmt, "RFC822"))
 145            || (!strcasecmp(whichfmt, "RFC822.TEXT")) ) {
 146                 need_body = 1;
 147         }
 148
 149         /* If this is an RFC822.SIZE fetch, first look in the message's
 150          * metadata record to see if we've saved that information.
 151          */
 152         if (!strcasecmp(whichfmt, "RFC822.SIZE")) {
 153                 GetMetaData(&smi, msgnum);
 154                 if (smi.meta_rfc822_length > 0L) {
 155                         cprintf("RFC822.SIZE %ld", smi.meta_rfc822_length);
 156                         return;
 157                 }
 158                 need_to_rewrite_metadata = 1;
 159                 need_body = 1;
 160         }
 161
 162         /* Cache the most recent RFC822 FETCH because some clients like to
 163          * fetch in pieces, and we don't want to have to go back to the
 164          * message store for each piece.  We also burn the cache if the
 165          * client requests something that involves reading the message
 166          * body, but we haven't fetched the body yet.
 167          */
 168         if ((IMAP->cached_rfc822_data != NULL)
 169            && (IMAP->cached_rfc822_msgnum == msgnum)
 170            && (IMAP->cached_rfc822_withbody || (!need_body)) ) {
 171                 /* Good to go! */
 172         }
 173         else if (IMAP->cached_rfc822_data != NULL) {
 174                 /* Some other message is cached -- free it */
 175                 free(IMAP->cached_rfc822_data);
 176                 IMAP->cached_rfc822_data = NULL;
 177                 IMAP->cached_rfc822_msgnum = (-1);
 178                 IMAP->cached_rfc822_len = 0;
 179         }
 180
 181         /* At this point, we now can fetch and convert the message iff it's not
 182          * the one we had cached.
 183          */
 184         if (IMAP->cached_rfc822_data == NULL) {
 185                 /*
 186                  * Load the message into memory for translation & measurement
 187                  */
 188                 CC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
 189                 CtdlOutputMsg(msgnum, MT_RFC822,
 190                         (need_body ? HEADERS_ALL : HEADERS_FAST),
 191                         0, 1, NULL, SUPPRESS_ENV_TO
 192                 );
 193                 if (!need_body) cprintf("\r\n");        /* extra trailing newline */
 194                 IMAP->cached_rfc822_len = StrLength(CC->redirect_buffer);
 195                 IMAP->cached_rfc822_data = SmashStrBuf(&CC->redirect_buffer);
 196                 IMAP->cached_rfc822_msgnum = msgnum;
 197                 IMAP->cached_rfc822_withbody = need_body;
 198                 if ( (need_to_rewrite_metadata) && (IMAP->cached_rfc822_len > 0) ) {
 199                         smi.meta_rfc822_length = (long)IMAP->cached_rfc822_len;
 200                         PutMetaData(&smi);
 201                 }
 202         }
 203
 204         /*
 205          * Now figure out where the headers/text break is.  IMAP considers the
 206          * intervening blank line to be part of the headers, not the text.
 207          */
 208         headers_size = 0;
 209         text_size = 0;
 210         total_size = 0;
 211
 212         if (need_body) {
 213                 ptr = IMAP->cached_rfc822_data;
 214                 do {
 215                         ptr = memreadline(ptr, buf, sizeof buf);
 216                         if (*ptr != 0) {
 217                                 striplt(buf);
 218                                 if (IsEmptyStr(buf)) {
 219                                         headers_size = ptr - IMAP->cached_rfc822_data;
 220                                 }
 221                         }
 222                 } while ( (headers_size == 0) && (*ptr != 0) );
 223
 224                 total_size = IMAP->cached_rfc822_len;
 225                 text_size = total_size - headers_size;
 226         }
 227         else {
 228                 headers_size = IMAP->cached_rfc822_len;
 229                 total_size = IMAP->cached_rfc822_len;
 230                 text_size = 0;
 231         }
 232
 233         CtdlLogPrintf(CTDL_DEBUG,
 234                 "RFC822: headers=" SIZE_T_FMT
 235                 ", text=" SIZE_T_FMT
 236                 ", total=" SIZE_T_FMT "\n",
 237                 headers_size, text_size, total_size);
 238
 239         if (!strcasecmp(whichfmt, "RFC822.SIZE")) {
 240                 cprintf("RFC822.SIZE " SIZE_T_FMT, total_size);
 241                 return;
 242         }
 243
 244         else if (!strcasecmp(whichfmt, "RFC822")) {
 245                 ptr = IMAP->cached_rfc822_data;
 246                 bytes_to_send = total_size;
 247         }
 248
 249         else if (!strcasecmp(whichfmt, "RFC822.HEADER")) {
 250                 ptr = IMAP->cached_rfc822_data;
 251                 bytes_to_send = headers_size;
 252         }
 253
 254         else if (!strcasecmp(whichfmt, "RFC822.TEXT")) {
 255                 ptr = &IMAP->cached_rfc822_data[headers_size];
 256                 bytes_to_send = text_size;
 257         }
 258
 259         cprintf("%s {" SIZE_T_FMT "}\r\n", whichfmt, bytes_to_send);
 260         client_write(ptr, bytes_to_send);
 261 }
 262
 263
 264
 265 /*
 266  * Load a specific part of a message into the temp file to be output to a
 267  * client.  FIXME we can handle parts like "2" and "2.1" and even "2.MIME"
 268  * but we still can't handle "2.HEADER" (which might not be a problem).
 269  *
 270  * Note: mime_parser() was called with dont_decode set to 1, so we have the
 271  * luxury of simply spewing without having to re-encode.
 272  */
 273 void imap_load_part(char *name, char *filename, char *partnum, char *disp,
 274                     void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
 275                     char *cbid, void *cbuserdata)
 276 {
 277         char mbuf2[SIZ];
 278         char *desired_section;
 279
 280         desired_section = (char *)cbuserdata;
 281
 282         if (!strcasecmp(partnum, desired_section)) {
 283                 client_write(content, length);
 284         }
 285
 286         snprintf(mbuf2, sizeof mbuf2, "%s.MIME", partnum);
 287
 288         if (!strcasecmp(desired_section, mbuf2)) {
 289                 cprintf("Content-type: %s", cbtype);
 290                 if (!IsEmptyStr(cbcharset))
 291                         cprintf("; charset=\"%s\"", cbcharset);
 292                 if (!IsEmptyStr(name))
 293                         cprintf("; name=\"%s\"", name);
 294                 cprintf("\r\n");
 295                 if (!IsEmptyStr(encoding))
 296                         cprintf("Content-Transfer-Encoding: %s\r\n", encoding);
 297                 if (!IsEmptyStr(encoding)) {
 298                         cprintf("Content-Disposition: %s", disp);
 299                         if (!IsEmptyStr(filename)) {
 300                                 cprintf("; filename=\"%s\"", filename);
 301                         }
 302                         cprintf("\r\n");
 303                 }
 304                 cprintf("Content-Length: %ld\r\n", (long)length);
 305                 cprintf("\r\n");
 306         }
 307
 308
 309 }
 310
 311
 312 /*
 313  * Called by imap_fetch_envelope() to output the "From" field.
 314  * This is in its own function because its logic is kind of complex.  We
 315  * really need to make this suck less.
 316  */
 317 void imap_output_envelope_from(struct CtdlMessage *msg) {
 318         char user[SIZ], node[SIZ], name[SIZ];
 319
 320         if (!msg) return;
 321
 322         /* For anonymous messages, it's so easy! */
 323         if (!is_room_aide() && (msg->cm_anon_type == MES_ANONONLY)) {
 324                 cprintf("((\"----\" NIL \"x\" \"x.org\")) ");
 325                 return;
 326         }
 327         if (!is_room_aide() && (msg->cm_anon_type == MES_ANONOPT)) {
 328                 cprintf("((\"anonymous\" NIL \"x\" \"x.org\")) ");
 329                 return;
 330         }
 331
 332         /* For everything else, we do stuff. */
 333         cprintf("((");                          /* open double-parens */
 334         plain_imap_strout(msg->cm_fields['A']); /* personal name */
 335         cprintf(" NIL ");                       /* source route (not used) */
 336
 337
 338         if (msg->cm_fields['F'] != NULL) {
 339                 process_rfc822_addr(msg->cm_fields['F'], user, node, name);
 340                 plain_imap_strout(user);                /* mailbox name (user id) */
 341                 cprintf(" ");
 342                 if (!strcasecmp(node, config.c_nodename)) {
 343                         plain_imap_strout(config.c_fqdn);
 344                 }
 345                 else {
 346                         plain_imap_strout(node);                /* host name */
 347                 }
 348         }
 349         else {
 350                 plain_imap_strout(msg->cm_fields['A']); /* mailbox name (user id) */
 351                 cprintf(" ");
 352                 plain_imap_strout(msg->cm_fields['N']); /* host name */
 353         }
 354
 355         cprintf(")) ");                         /* close double-parens */
 356 }
 357
 358
 359
 360 /*
 361  * Output an envelope address (or set of addresses) in the official,
 362  * convoluted, braindead format.  (Note that we can't use this for
 363  * the "From" address because its data may come from a number of different
 364  * fields.  But we can use it for "To" and possibly others.
 365  */
 366 void imap_output_envelope_addr(char *addr) {
 367         char individual_addr[256];
 368         int num_addrs;
 369         int i;
 370         char user[256];
 371         char node[256];
 372         char name[256];
 373
 374         if (addr == NULL) {
 375                 cprintf("NIL ");
 376                 return;
 377         }
 378
 379         if (IsEmptyStr(addr)) {
 380                 cprintf("NIL ");
 381                 return;
 382         }
 383
 384         cprintf("(");
 385
 386         /* How many addresses are listed here? */
 387         num_addrs = num_tokens(addr, ',');
 388
 389         /* Output them one by one. */
 390         for (i=0; i<num_addrs; ++i) {
 391                 extract_token(individual_addr, addr, i, ',', sizeof individual_addr);
 392                 striplt(individual_addr);
 393                 process_rfc822_addr(individual_addr, user, node, name);
 394                 cprintf("(");
 395                 plain_imap_strout(name);
 396                 cprintf(" NIL ");
 397                 plain_imap_strout(user);
 398                 cprintf(" ");
 399                 plain_imap_strout(node);
 400                 cprintf(")");
 401                 if (i < (num_addrs-1)) cprintf(" ");
 402         }
 403
 404         cprintf(") ");
 405 }
 406
 407
 408 /*
 409  * Implements the ENVELOPE fetch item
 410  *
 411  * Note that the imap_strout() function can cleverly output NULL fields as NIL,
 412  * so we don't have to check for that condition like we do elsewhere.
 413  */
 414 void imap_fetch_envelope(struct CtdlMessage *msg) {
 415         char datestringbuf[SIZ];
 416         time_t msgdate;
 417         char *fieldptr = NULL;
 418
 419         if (!msg) return;
 420
 421         /* Parse the message date into an IMAP-format date string */
 422         if (msg->cm_fields['T'] != NULL) {
 423                 msgdate = atol(msg->cm_fields['T']);
 424         }
 425         else {
 426                 msgdate = time(NULL);
 427         }
 428         datestring(datestringbuf, sizeof datestringbuf,
 429                 msgdate, DATESTRING_IMAP);
 430
 431         /* Now start spewing data fields.  The order is important, as it is
 432          * defined by the protocol specification.  Nonexistent fields must
 433          * be output as NIL, existent fields must be quoted or literalled.
 434          * The imap_strout() function conveniently does all this for us.
 435          */
 436         cprintf("ENVELOPE (");
 437
 438         /* Date */
 439         plain_imap_strout(datestringbuf);
 440         cprintf(" ");
 441
 442         /* Subject */
 443         plain_imap_strout(msg->cm_fields['U']);
 444         cprintf(" ");
 445
 446         /* From */
 447         imap_output_envelope_from(msg);
 448
 449         /* Sender (default to same as 'From' if not present) */
 450         fieldptr = rfc822_fetch_field(msg->cm_fields['M'], "Sender");
 451         if (fieldptr != NULL) {
 452                 imap_output_envelope_addr(fieldptr);
 453                 free(fieldptr);
 454         }
 455         else {
 456                 imap_output_envelope_from(msg);
 457         }
 458
 459         /* Reply-to */
 460         fieldptr = rfc822_fetch_field(msg->cm_fields['M'], "Reply-to");
 461         if (fieldptr != NULL) {
 462                 imap_output_envelope_addr(fieldptr);
 463                 free(fieldptr);
 464         }
 465         else {
 466                 imap_output_envelope_from(msg);
 467         }
 468
 469         /* To */
 470         imap_output_envelope_addr(msg->cm_fields['R']);
 471
 472         /* Cc (we do it this way because there might be a legacy non-Citadel Cc: field present) */
 473         fieldptr = msg->cm_fields['Y'];
 474         if (fieldptr != NULL) {
 475                 imap_output_envelope_addr(fieldptr);
 476         }
 477         else {
 478                 fieldptr = rfc822_fetch_field(msg->cm_fields['M'], "Cc");
 479                 imap_output_envelope_addr(fieldptr);
 480                 if (fieldptr != NULL) free(fieldptr);
 481         }
 482
 483         /* Bcc */
 484         fieldptr = rfc822_fetch_field(msg->cm_fields['M'], "Bcc");
 485         imap_output_envelope_addr(fieldptr);
 486         if (fieldptr != NULL) free(fieldptr);
 487
 488         /* In-reply-to */
 489         fieldptr = rfc822_fetch_field(msg->cm_fields['M'], "In-reply-to");
 490         plain_imap_strout(fieldptr);
 491         cprintf(" ");
 492         if (fieldptr != NULL) free(fieldptr);
 493
 494         /* message ID */
 495         plain_imap_strout(msg->cm_fields['I']);
 496
 497         cprintf(")");
 498 }
 499
 500 /*
 501  * This function is called only when CC->redirect_buffer contains a set of
 502  * RFC822 headers with no body attached.  Its job is to strip that set of
 503  * headers down to *only* the ones we're interested in.
 504  */
 505 void imap_strip_headers(StrBuf *section) {
 506         citimap_command Cmd;
 507         StrBuf *which_fields = NULL;
 508         int doing_headers = 0;
 509         int headers_not = 0;
 510         int num_parms = 0;
 511         int i;
 512         StrBuf *boiled_headers = NULL;
 513         StrBuf *Line;
 514         int ok = 0;
 515         int done_headers = 0;
 516         const char *Ptr = NULL;
 517         CitContext *CCC = CC;
 518
 519         if (CCC->redirect_buffer == NULL) return;
 520
 521         which_fields = NewStrBufDup(section);
 522
 523         if (!strncasecmp(ChrPtr(which_fields), "HEADER.FIELDS", 13))
 524                 doing_headers = 1;
 525         if (doing_headers &&
 526             !strncasecmp(ChrPtr(which_fields), "HEADER.FIELDS.NOT", 17))
 527                 headers_not = 1;
 528
 529         for (i=0; i < StrLength(which_fields); ++i) {
 530                 if (ChrPtr(which_fields)[i]=='(')
 531                         StrBufReplaceToken(which_fields, i, 1, HKEY(""));
 532         }
 533         for (i=0; i < StrLength(which_fields); ++i) {
 534                 if (ChrPtr(which_fields)[i]==')') {
 535                         StrBufCutAt(which_fields, i, NULL);
 536                         break;
 537                 }
 538         }
 539         memset(&Cmd, 0, sizeof(citimap_command));
 540         Cmd.CmdBuf = which_fields;
 541         num_parms = imap_parameterize(&Cmd);
 542
 543         boiled_headers = NewStrBufPlain(NULL, StrLength(CCC->redirect_buffer));
 544         Line = NewStrBufPlain(NULL, SIZ);
 545         Ptr = NULL;
 546         ok = 0;
 547         do {
 548                 StrBufSipLine(Line, CCC->redirect_buffer, &Ptr);
 549
 550                 if (!isspace(ChrPtr(Line)[0])) {
 551                         ok = 0;
 552                         if (doing_headers == 0) ok = 1;
 553                         else {
 554                                 /* we're supposed to print all headers that are not matching the filter list */
 555                                 if (headers_not) for (i=0, ok = 1; (i < num_parms) && (ok == 1); ++i) {
 556                                                 if ( (!strncasecmp(ChrPtr(Line),
 557                                                                    Cmd.Params[i].Key,
 558                                                                    Cmd.Params[i].len)) &&
 559                                                      (ChrPtr(Line)[Cmd.Params[i].len]==':') ) {
 560                                                         ok = 0;
 561                                                 }
 562                                 }
 563                                 /* we're supposed to print all headers matching the filterlist */
 564                                 else for (i=0, ok = 0; ((i < num_parms) && (ok == 0)); ++i) {
 565                                                 if ( (!strncasecmp(ChrPtr(Line),
 566                                                                    Cmd.Params[i].Key,
 567                                                                    Cmd.Params[i].len)) &&
 568                                                      (ChrPtr(Line)[Cmd.Params[i].len]==':') ) {
 569                                                         ok = 1;
 570                                         }
 571                                 }
 572                         }
 573                 }
 574
 575                 if (ok) {
 576                         StrBufAppendBuf(boiled_headers, Line, 0);
 577                         StrBufAppendBufPlain(boiled_headers, HKEY("\r\n"), 0);
 578                 }
 579
 580                 if ((Ptr == StrBufNOTNULL)  ||
 581                     (StrLength(Line) == 0)  ||
 582                     (ChrPtr(Line)[0]=='\r') ||
 583                     (ChrPtr(Line)[0]=='\n')   ) done_headers = 1;
 584         } while (!done_headers);
 585
 586         StrBufAppendBufPlain(boiled_headers, HKEY("\r\n"), 0);
 587
 588         /* Now save it back (it'll always be smaller) */
 589         FreeStrBuf(&CCC->redirect_buffer);
 590         CCC->redirect_buffer = boiled_headers;
 591
 592         FreeStrBuf(&which_fields);
 593         FreeStrBuf(&Line);
 594 }
 595
 596
 597 /*
 598  * Implements the BODY and BODY.PEEK fetch items
 599  */
 600 void imap_fetch_body(long msgnum, ConstStr item, int is_peek) {
 601         struct CtdlMessage *msg = NULL;
 602         StrBuf *section;
 603         StrBuf *partial;
 604         int is_partial = 0;
 605         size_t pstart, pbytes;
 606         int loading_body_now = 0;
 607         int need_body = 1;
 608         int burn_the_cache = 0;
 609         CitContext *CCC = CC;
 610
 611         /* extract section */
 612         section = NewStrBufPlain(CKEY(item));
 613
 614         if (strchr(ChrPtr(section), '[') != NULL) {
 615                 StrBufStripAllBut(section, '[', ']');
 616         }
 617         CtdlLogPrintf(CTDL_DEBUG, "Section is: %s%s\n",
 618                       ChrPtr(section),
 619                       (StrLength(section) == 0) ? "(empty)" : ""
 620         );
 621
 622         /* Burn the cache if we don't have the same section of the
 623          * same message again.
 624          */
 625         if (IMAP->cached_body != NULL) {
 626                 if (IMAP->cached_bodymsgnum != msgnum) {
 627                         burn_the_cache = 1;
 628                 }
 629                 else if ( (!IMAP->cached_body_withbody) && (need_body) ) {
 630                         burn_the_cache = 1;
 631                 }
 632                 else if (strcasecmp(IMAP->cached_bodypart, ChrPtr(section))) {
 633                         burn_the_cache = 1;
 634                 }
 635                 if (burn_the_cache) {
 636                         /* Yup, go ahead and burn the cache. */
 637                         free(IMAP->cached_body);
 638                         IMAP->cached_body_len = 0;
 639                         IMAP->cached_body = NULL;
 640                         IMAP->cached_bodymsgnum = (-1);
 641                         strcpy(IMAP->cached_bodypart, "");
 642                 }
 643         }
 644
 645         /* extract partial */
 646         partial = NewStrBufPlain(CKEY(item));
 647         if (strchr(ChrPtr(partial), '<') != NULL) {
 648                 StrBufStripAllBut(partial, '<', '>');
 649                 is_partial = 1;
 650         }
 651         if (is_partial == 0)
 652                 if (StrLength(partial) > 0)
 653                         CtdlLogPrintf(CTDL_DEBUG,
 654                                       "Partial is %s\n",
 655                                       ChrPtr(partial));
 656
 657         if (IMAP->cached_body == NULL) {
 658                 CCC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
 659                 loading_body_now = 1;
 660                 msg = CtdlFetchMessage(msgnum, (need_body ? 1 : 0));
 661         }
 662
 663         /* Now figure out what the client wants, and get it */
 664
 665         if (!loading_body_now) {
 666                 /* What we want is already in memory */
 667         }
 668
 669         else if ( (!strcmp(ChrPtr(section), "1")) && (msg->cm_format_type != 4) ) {
 670                 CtdlOutputPreLoadedMsg(msg, MT_RFC822, HEADERS_NONE, 0, 1, SUPPRESS_ENV_TO);
 671         }
 672
 673         else if (StrLength(section) == 0) {
 674                 CtdlOutputPreLoadedMsg(msg, MT_RFC822, HEADERS_ALL, 0, 1, SUPPRESS_ENV_TO);
 675         }
 676
 677         /*
 678          * If the client asked for just headers, or just particular header
 679          * fields, strip it down.
 680          */
 681         else if (!strncasecmp(ChrPtr(section), "HEADER", 6)) {
 682                 /* This used to work with HEADERS_FAST, but then Apple got stupid with their
 683                  * IMAP library and this broke Mail.App and iPhone Mail, so we had to change it
 684                  * to HEADERS_ONLY so the trendy hipsters with their iPhones can read mail.
 685                  */
 686                 CtdlOutputPreLoadedMsg(msg, MT_RFC822, HEADERS_ONLY, 0, 1, SUPPRESS_ENV_TO);
 687                 imap_strip_headers(section);
 688         }
 689
 690         /*
 691          * Strip it down if the client asked for everything _except_ headers.
 692          */
 693         else if (!strncasecmp(ChrPtr(section), "TEXT", 4)) {
 694                 CtdlOutputPreLoadedMsg(msg, MT_RFC822, HEADERS_NONE, 0, 1, SUPPRESS_ENV_TO);
 695         }
 696
 697         /*
 698          * Anything else must be a part specifier.
 699          * (Note value of 1 passed as 'dont_decode' so client gets it encoded)
 700          */
 701         else {
 702                 mime_parser(msg->cm_fields['M'], NULL,
 703                                 *imap_load_part, NULL, NULL,
 704                                 section,
 705                                 1);
 706         }
 707
 708         if (loading_body_now) {
 709                 IMAP->cached_body_len = StrLength(CCC->redirect_buffer);
 710                 IMAP->cached_body = SmashStrBuf(&CCC->redirect_buffer);
 711                 IMAP->cached_bodymsgnum = msgnum;
 712                 IMAP->cached_body_withbody = need_body;
 713                 strcpy(IMAP->cached_bodypart, ChrPtr(section));
 714         }
 715
 716         if (is_partial == 0) {
 717                 cprintf("BODY[%s] {" SIZE_T_FMT "}\r\n", ChrPtr(section), IMAP->cached_body_len);
 718                 pstart = 0;
 719                 pbytes = IMAP->cached_body_len;
 720         }
 721         else {
 722                 sscanf(ChrPtr(partial), SIZE_T_FMT "." SIZE_T_FMT, &pstart, &pbytes);
 723                 if (pbytes > (IMAP->cached_body_len - pstart)) {
 724                         pbytes = IMAP->cached_body_len - pstart;
 725                 }
 726                 cprintf("BODY[%s]<" SIZE_T_FMT "> {" SIZE_T_FMT "}\r\n", ChrPtr(section), pstart, pbytes);
 727         }
 728
 729         FreeStrBuf(&partial);
 730
 731         /* Here we go -- output it */
 732         client_write(&IMAP->cached_body[pstart], pbytes);
 733
 734         if (msg != NULL) {
 735                 CtdlFreeMessage(msg);
 736         }
 737
 738         /* Mark this message as "seen" *unless* this is a "peek" operation */
 739         if (is_peek == 0) {
 740                 CtdlSetSeen(&msgnum, 1, 1, ctdlsetseen_seen, NULL, NULL);
 741         }
 742 }
 743
 744 /*
 745  * Called immediately before outputting a multipart bodystructure
 746  */
 747 void imap_fetch_bodystructure_pre(
 748                 char *name, char *filename, char *partnum, char *disp,
 749                 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
 750                 char *cbid, void *cbuserdata
 751                 ) {
 752
 753         cprintf("(");
 754 }
 755
 756
 757
 758 /*
 759  * Called immediately after outputting a multipart bodystructure
 760  */
 761 void imap_fetch_bodystructure_post(
 762                 char *name, char *filename, char *partnum, char *disp,
 763                 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
 764                 char *cbid, void *cbuserdata
 765                 ) {
 766
 767         char subtype[128];
 768
 769         cprintf(" ");
 770
 771         /* disposition */
 772         extract_token(subtype, cbtype, 1, '/', sizeof subtype);
 773         plain_imap_strout(subtype);
 774
 775         /* body language */
 776         /* cprintf(" NIL"); We thought we needed this at one point, but maybe we don't... */
 777
 778         cprintf(")");
 779 }
 780
 781
 782
 783 /*
 784  * Output the info for a MIME part in the format required by BODYSTRUCTURE.
 785  *
 786  */
 787 void imap_fetch_bodystructure_part(
 788                 char *name, char *filename, char *partnum, char *disp,
 789                 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
 790                 char *cbid, void *cbuserdata
 791                 ) {
 792
 793         int have_cbtype = 0;
 794         int have_encoding = 0;
 795         int lines = 0;
 796         size_t i;
 797         char cbmaintype[128];
 798         char cbsubtype[128];
 799
 800         if (cbtype != NULL) if (!IsEmptyStr(cbtype)) have_cbtype = 1;
 801         if (have_cbtype) {
 802                 extract_token(cbmaintype, cbtype, 0, '/', sizeof cbmaintype);
 803                 extract_token(cbsubtype, cbtype, 1, '/', sizeof cbsubtype);
 804         }
 805         else {
 806                 strcpy(cbmaintype, "TEXT");
 807                 strcpy(cbsubtype, "PLAIN");
 808         }
 809
 810         cprintf("(");
 811         plain_imap_strout(cbmaintype);                                  /* body type */
 812         cprintf(" ");
 813         plain_imap_strout(cbsubtype);                                           /* body subtype */
 814         cprintf(" ");
 815
 816         cprintf("(");                                                   /* begin body parameter list */
 817
 818         /* "NAME" must appear as the first parameter.  This is not required by IMAP,
 819          * but the Asterisk voicemail application blindly assumes that NAME will be in
 820          * the first position.  If it isn't, it rejects the message.
 821          */
 822         if (name != NULL) if (!IsEmptyStr(name)) {
 823                 cprintf("\"NAME\" ");
 824                 plain_imap_strout(name);
 825                 cprintf(" ");
 826         }
 827
 828         cprintf("\"CHARSET\" ");
 829         if (cbcharset == NULL) {
 830                 plain_imap_strout("US-ASCII");
 831         }
 832         else if (cbcharset[0] == 0) {
 833                 plain_imap_strout("US-ASCII");
 834         }
 835         else {
 836                 plain_imap_strout(cbcharset);
 837         }
 838         cprintf(") ");                                                  /* end body parameter list */
 839
 840         cprintf("NIL ");                                                /* Body ID */
 841         cprintf("NIL ");                                                /* Body description */
 842
 843         if (encoding != NULL) if (encoding[0] != 0)  have_encoding = 1;
 844         if (have_encoding) {
 845                 plain_imap_strout(encoding);
 846         }
 847         else {
 848                 plain_imap_strout("7BIT");
 849         }
 850         cprintf(" ");
 851
 852         /* The next field is the size of the part in bytes. */
 853         cprintf("%ld ", (long)length);  /* bytes */
 854
 855         /* The next field is the number of lines in the part, if and only
 856          * if the part is TEXT.  More gratuitous complexity.
 857          */
 858         if (!strcasecmp(cbmaintype, "TEXT")) {
 859                 if (length) for (i=0; i<length; ++i) {
 860                         if (((char *)content)[i] == '\n') ++lines;
 861                 }
 862                 cprintf("%d ", lines);
 863         }
 864
 865         /* More gratuitous complexity */
 866         if ((!strcasecmp(cbmaintype, "MESSAGE"))
 867            && (!strcasecmp(cbsubtype, "RFC822"))) {
 868                 /* FIXME: message/rfc822 also needs to output the envelope structure,
 869                  * body structure, and line count of the encapsulated message.  Fortunately
 870                  * there are not yet any clients depending on this, so we can get away
 871                  * with not implementing it for now.
 872                  */
 873         }
 874
 875         /* MD5 value of body part; we can get away with NIL'ing this */
 876         cprintf("NIL ");
 877
 878         /* Disposition */
 879         if (disp == NULL) {
 880                 cprintf("NIL");
 881         }
 882         else if (IsEmptyStr(disp)) {
 883                 cprintf("NIL");
 884         }
 885         else {
 886                 cprintf("(");
 887                 plain_imap_strout(disp);
 888                 if (filename != NULL) if (!IsEmptyStr(filename)) {
 889                         cprintf(" (\"FILENAME\" ");
 890                         plain_imap_strout(filename);
 891                         cprintf(")");
 892                 }
 893                 cprintf(")");
 894         }
 895
 896         /* Body language (not defined yet) */
 897         cprintf(" NIL)");
 898 }
 899
 900
 901
 902 /*
 903  * Spew the BODYSTRUCTURE data for a message.
 904  *
 905  */
 906 void imap_fetch_bodystructure (long msgnum, const char *item,
 907                 struct CtdlMessage *msg) {
 908         const char *rfc822 = NULL;
 909         const char *rfc822_body = NULL;
 910         size_t rfc822_len;
 911         size_t rfc822_headers_len;
 912         size_t rfc822_body_len;
 913         const char *ptr = NULL;
 914         char *pch;
 915         char buf[SIZ];
 916         int lines = 0;
 917
 918         /* Handle NULL message gracefully */
 919         if (msg == NULL) {
 920                 cprintf("BODYSTRUCTURE (\"TEXT\" \"PLAIN\" "
 921                         "(\"CHARSET\" \"US-ASCII\") NIL NIL "
 922                         "\"7BIT\" 0 0)");
 923                 return;
 924         }
 925
 926         /* For non-RFC822 (ordinary Citadel) messages, this is short and
 927          * sweet...
 928          */
 929         if (msg->cm_format_type != FMT_RFC822) {
 930
 931                 /* *sigh* We have to RFC822-format the message just to be able
 932                  * to measure it.  FIXME use smi cached fields if possible
 933                  */
 934
 935                 CC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
 936                 CtdlOutputPreLoadedMsg(msg, MT_RFC822, 0, 0, 1, SUPPRESS_ENV_TO);
 937                 rfc822_len = StrLength(CC->redirect_buffer);
 938                 rfc822 = pch = SmashStrBuf(&CC->redirect_buffer);
 939
 940                 ptr = rfc822;
 941                 do {
 942                         ptr = memreadline(ptr, buf, sizeof buf);
 943                         ++lines;
 944                         if ((IsEmptyStr(buf)) && (rfc822_body == NULL)) {
 945                                 rfc822_body = ptr;
 946                         }
 947                 } while (*ptr != 0);
 948
 949                 rfc822_headers_len = rfc822_body - rfc822;
 950                 rfc822_body_len = rfc822_len - rfc822_headers_len;
 951                 free(pch);
 952
 953                 cprintf("BODYSTRUCTURE (\"TEXT\" \"PLAIN\" "
 954                         "(\"CHARSET\" \"US-ASCII\") NIL NIL "
 955                         "\"7BIT\" " SIZE_T_FMT " %d)", rfc822_body_len, lines);
 956
 957                 return;
 958         }
 959
 960         /* For messages already stored in RFC822 format, we have to parse. */
 961         cprintf("BODYSTRUCTURE ");
 962         mime_parser(msg->cm_fields['M'],
 963                         NULL,
 964                         *imap_fetch_bodystructure_part, /* part */
 965                         *imap_fetch_bodystructure_pre,  /* pre-multi */
 966                         *imap_fetch_bodystructure_post, /* post-multi */
 967                         NULL,
 968                         1);     /* don't decode -- we want it as-is */
 969 }
 970
 971
 972 /*
 973  * imap_do_fetch() calls imap_do_fetch_msg() to output the data of an
 974  * individual message, once it has been selected for output.
 975  */
 976 void imap_do_fetch_msg(int seq, citimap_command *Cmd) {
 977         int i;
 978         citimap *Imap = IMAP;
 979         struct CtdlMessage *msg = NULL;
 980         int body_loaded = 0;
 981
 982         /* Don't attempt to fetch bogus messages or UID's */
 983         if (seq < 1) return;
 984         if (Imap->msgids[seq-1] < 1L) return;
 985
 986         buffer_output();
 987         cprintf("* %d FETCH (", seq);
 988
 989         for (i=0; i<Cmd->num_parms; ++i) {
 990
 991                 /* Fetchable without going to the message store at all */
 992                 if (!strcasecmp(Cmd->Params[i].Key, "UID")) {
 993                         imap_fetch_uid(seq);
 994                 }
 995                 else if (!strcasecmp(Cmd->Params[i].Key, "FLAGS")) {
 996                         imap_fetch_flags(seq-1);
 997                 }
 998
 999                 /* Potentially fetchable from cache, if the client requests
1000                  * stuff from the same message several times in a row.
1001                  */
1002                 else if (!strcasecmp(Cmd->Params[i].Key, "RFC822")) {
1003                         imap_fetch_rfc822(Imap->msgids[seq-1], Cmd->Params[i].Key);
1004                 }
1005                 else if (!strcasecmp(Cmd->Params[i].Key, "RFC822.HEADER")) {
1006                         imap_fetch_rfc822(Imap->msgids[seq-1], Cmd->Params[i].Key);
1007                 }
1008                 else if (!strcasecmp(Cmd->Params[i].Key, "RFC822.SIZE")) {
1009                         imap_fetch_rfc822(Imap->msgids[seq-1], Cmd->Params[i].Key);
1010                 }
1011                 else if (!strcasecmp(Cmd->Params[i].Key, "RFC822.TEXT")) {
1012                         imap_fetch_rfc822(Imap->msgids[seq-1], Cmd->Params[i].Key);
1013                 }
1014
1015                 /* BODY fetches do their own fetching and caching too. */
1016                 else if (!strncasecmp(Cmd->Params[i].Key, "BODY[", 5)) {
1017                         imap_fetch_body(Imap->msgids[seq-1], Cmd->Params[i], 0);
1018                 }
1019                 else if (!strncasecmp(Cmd->Params[i].Key, "BODY.PEEK[", 10)) {
1020                         imap_fetch_body(Imap->msgids[seq-1], Cmd->Params[i], 1);
1021                 }
1022
1023                 /* Otherwise, load the message into memory.
1024                  */
1025                 else if (!strcasecmp(Cmd->Params[i].Key, "BODYSTRUCTURE")) {
1026                         if ((msg != NULL) && (!body_loaded)) {
1027                                 CtdlFreeMessage(msg);   /* need the whole thing */
1028                                 msg = NULL;
1029                         }
1030                         if (msg == NULL) {
1031                                 msg = CtdlFetchMessage(Imap->msgids[seq-1], 1);
1032                                 body_loaded = 1;
1033                         }
1034                         imap_fetch_bodystructure(Imap->msgids[seq-1],
1035                                         Cmd->Params[i].Key, msg);
1036                 }
1037                 else if (!strcasecmp(Cmd->Params[i].Key, "ENVELOPE")) {
1038                         if (msg == NULL) {
1039                                 msg = CtdlFetchMessage(Imap->msgids[seq-1], 0);
1040                                 body_loaded = 0;
1041                         }
1042                         imap_fetch_envelope(msg);
1043                 }
1044                 else if (!strcasecmp(Cmd->Params[i].Key, "INTERNALDATE")) {
1045                         if (msg == NULL) {
1046                                 msg = CtdlFetchMessage(Imap->msgids[seq-1], 0);
1047                                 body_loaded = 0;
1048                         }
1049                         imap_fetch_internaldate(msg);
1050                 }
1051
1052                 if (i != Cmd->num_parms-1) cprintf(" ");
1053         }
1054
1055         cprintf(")\r\n");
1056         unbuffer_output();
1057         if (msg != NULL) {
1058                 CtdlFreeMessage(msg);
1059         }
1060 }
1061
1062
1063
1064 /*
1065  * imap_fetch() calls imap_do_fetch() to do its actual work, once it's
1066  * validated and boiled down the request a bit.
1067  */
1068 void imap_do_fetch(citimap_command *Cmd) {
1069         int i;
1070 #if 0
1071 /* debug output the parsed vector */
1072         {
1073                 int i;
1074                 CtdlLogPrintf(CTDL_DEBUG, "----- %ld params \n",
1075                               Cmd->num_parms);
1076
1077         for (i=0; i < Cmd->num_parms; i++) {
1078                 if (Cmd->Params[i].len != strlen(Cmd->Params[i].Key))
1079                         CtdlLogPrintf(CTDL_DEBUG, "*********** %ld != %ld : %s\n",
1080                                       Cmd->Params[i].len,
1081                                       strlen(Cmd->Params[i].Key),
1082                                       Cmd->Params[i].Key);
1083                 else
1084                         CtdlLogPrintf(CTDL_DEBUG, "%ld : %s\n",
1085                                       Cmd->Params[i].len,
1086                                       Cmd->Params[i].Key);
1087         }}
1088
1089 #endif
1090
1091         if (IMAP->num_msgs > 0) {
1092                 for (i = 0; i < IMAP->num_msgs; ++i) {
1093
1094                         /* Abort the fetch loop if the session breaks.
1095                          * This is important for users who keep mailboxes
1096                          * that are too big *and* are too impatient to
1097                          * let them finish loading.  :)
1098                          */
1099                         if (CC->kill_me) return;
1100
1101                         /* Get any message marked for fetch. */
1102                         if (IMAP->flags[i] & IMAP_SELECTED) {
1103                                 imap_do_fetch_msg(i+1, Cmd);
1104                         }
1105                 }
1106         }
1107 }
1108
1109
1110
1111 /*
1112  * Back end for imap_handle_macros()
1113  * Note that this function *only* looks at the beginning of the string.  It
1114  * is not a generic search-and-replace function.
1115  */
1116 void imap_macro_replace(StrBuf *Buf, long where,
1117                         StrBuf *TmpBuf,
1118                         char *find, long findlen,
1119                         char *replace, long replacelen)
1120 {
1121
1122         if (StrLength(Buf) - where > findlen)
1123                 return;
1124
1125         if (!strncasecmp(ChrPtr(Buf) + where, find, findlen)) {
1126                 if (ChrPtr(Buf)[where + findlen] == ' ') {
1127                         StrBufPlain(TmpBuf, replace, replacelen);
1128                         StrBufAppendBufPlain(TmpBuf, HKEY(" "), 0);
1129                         StrBufReplaceToken(Buf, where, findlen,
1130                                            SKEY(TmpBuf));
1131                 }
1132                 if (where + findlen == StrLength(Buf)) {
1133                         StrBufReplaceToken(Buf, where, findlen,
1134                                            replace, replacelen);
1135                 }
1136         }
1137 }
1138
1139
1140
1141 /*
1142  * Handle macros embedded in FETCH data items.
1143  * (What the heck are macros doing in a wire protocol?  Are we trying to save
1144  * the computer at the other end the trouble of typing a lot of characters?)
1145  */
1146 void imap_handle_macros(citimap_command *Cmd) {
1147         long i;
1148         int nest = 0;
1149         StrBuf *Tmp = NewStrBuf();
1150
1151         for (i=0; i < StrLength(Cmd->CmdBuf); ++i) {
1152                 char ch = ChrPtr(Cmd->CmdBuf)[i];
1153                 if ((ch=='(') ||
1154                     (ch=='[') ||
1155                     (ch=='<') ||
1156                     (ch=='{')) ++nest;
1157                 else if ((ch==')') ||
1158                          (ch==']') ||
1159                          (ch=='>') ||
1160                          (ch=='}')) --nest;
1161
1162                 if (nest <= 0) {
1163                         imap_macro_replace(Cmd->CmdBuf, i,
1164                                            Tmp,
1165                                            HKEY("ALL"),
1166                                            HKEY("FLAGS INTERNALDATE RFC822.SIZE ENVELOPE")
1167                         );
1168                         imap_macro_replace(Cmd->CmdBuf, i,
1169                                            Tmp,
1170                                            HKEY("BODY"),
1171                                            HKEY("BODYSTRUCTURE")
1172                         );
1173                         imap_macro_replace(Cmd->CmdBuf, i,
1174                                            Tmp,
1175                                            HKEY("FAST"),
1176                                            HKEY("FLAGS INTERNALDATE RFC822.SIZE")
1177                         );
1178                         imap_macro_replace(Cmd->CmdBuf, i,
1179                                            Tmp,
1180                                            HKEY("FULL"),
1181                                            HKEY("FLAGS INTERNALDATE RFC822.SIZE ENVELOPE BODY")
1182                         );
1183                 }
1184         }
1185         FreeStrBuf(&Tmp);
1186 }
1187
1188
1189 /*
1190  * Break out the data items requested, possibly a parenthesized list.
1191  * Returns the number of data items, or -1 if the list is invalid.
1192  * NOTE: this function alters the string it is fed, and uses it as a buffer
1193  * to hold the data for the pointers it returns.
1194  */
1195 int imap_extract_data_items(citimap_command *Cmd)
1196 {
1197         int nArgs;
1198         int nest = 0;
1199         const char *pch, *end;
1200         long initial_len;
1201
1202         /* Convert all whitespace to ordinary space characters. */
1203         pch = ChrPtr(Cmd->CmdBuf);
1204         end = pch + StrLength(Cmd->CmdBuf);
1205
1206         while (pch < end)
1207         {
1208                 if (isspace(*pch))
1209                         StrBufPeek(Cmd->CmdBuf, pch, 0, ' ');
1210                 pch++;
1211         }
1212
1213         /* Strip leading and trailing whitespace, then strip leading and
1214          * trailing parentheses if it's a list
1215          */
1216         StrBufTrim(Cmd->CmdBuf);
1217         pch = ChrPtr(Cmd->CmdBuf);
1218         if ( (pch[0]=='(') &&
1219              (pch[StrLength(Cmd->CmdBuf)-1]==')') )
1220         {
1221                 StrBufCutRight(Cmd->CmdBuf, 1);
1222                 StrBufCutLeft(Cmd->CmdBuf, 1);
1223                 StrBufTrim(Cmd->CmdBuf);
1224         }
1225
1226         /* Parse any macro data items */
1227         imap_handle_macros(Cmd);
1228
1229         /*
1230          * Now break out the data items.  We throw in one trailing space in
1231          * order to avoid having to break out the last one manually.
1232          */
1233         nArgs = StrLength(Cmd->CmdBuf) / 10 + 10;
1234         nArgs = CmdAdjust(Cmd, nArgs, 0);
1235         initial_len = StrLength(Cmd->CmdBuf);
1236         Cmd->num_parms = 0;
1237         Cmd->Params[Cmd->num_parms].Key = pch = ChrPtr(Cmd->CmdBuf);
1238         end = Cmd->Params[Cmd->num_parms].Key + StrLength(Cmd->CmdBuf);
1239
1240         while (pch < end)
1241         {
1242                 if ((*pch=='(') ||
1243                     (*pch=='[') ||
1244                     (*pch=='<') ||
1245                     (*pch=='{'))
1246                         ++nest;
1247
1248                 else if ((*pch==')') ||
1249                          (*pch==']') ||
1250                          (*pch=='>') ||
1251                          (*pch=='}'))
1252                         --nest;
1253
1254                 if ((nest <= 0) && (*pch==' ')) {
1255                         StrBufPeek(Cmd->CmdBuf, pch, 0, '\0');
1256                         Cmd->Params[Cmd->num_parms].len =
1257                                 pch - Cmd->Params[Cmd->num_parms].Key;
1258
1259                         if (Cmd->num_parms + 1 >= Cmd->avail_parms) {
1260                                 nArgs = CmdAdjust(Cmd, nArgs * 2, 1);
1261                         }
1262                         Cmd->num_parms++;
1263                         Cmd->Params[Cmd->num_parms].Key = ++pch;
1264                 }
1265                 else if (pch + 1 == end) {
1266                         Cmd->Params[Cmd->num_parms].len =
1267                                 pch - Cmd->Params[Cmd->num_parms].Key + 1;
1268
1269                         Cmd->num_parms++;
1270                 }
1271                 pch ++;
1272         }
1273         return Cmd->num_parms;
1274
1275 }
1276
1277
1278 /*
1279  * One particularly hideous aspect of IMAP is that we have to allow the client
1280  * to specify arbitrary ranges and/or sets of messages to fetch.  Citadel IMAP
1281  * handles this by setting the IMAP_SELECTED flag for each message specified in
1282  * the ranges/sets, then looping through the message array, outputting messages
1283  * with the flag set.  We don't bother returning an error if an out-of-range
1284  * number is specified (we just return quietly) because any client braindead
1285  * enough to request a bogus message number isn't going to notice the
1286  * difference anyway.
1287  *
1288  * This function clears out the IMAP_SELECTED bits, then sets that bit for each
1289  * message included in the specified range.
1290  *
1291  * Set is_uid to 1 to fetch by UID instead of sequence number.
1292  */
1293 void imap_pick_range(const char *supplied_range, int is_uid) {
1294         int i;
1295         int num_sets;
1296         int s;
1297         char setstr[SIZ], lostr[SIZ], histr[SIZ];
1298         long lo, hi;
1299         char actual_range[SIZ];
1300         citimap *Imap;
1301
1302         /*
1303          * Handle the "ALL" macro
1304          */
1305         if (!strcasecmp(supplied_range, "ALL")) {
1306                 safestrncpy(actual_range, "1:*", sizeof actual_range);
1307         }
1308         else {
1309                 safestrncpy(actual_range, supplied_range, sizeof actual_range);
1310         }
1311
1312         Imap = IMAP;
1313         /*
1314          * Clear out the IMAP_SELECTED flags for all messages.
1315          */
1316         for (i = 0; i < Imap->num_msgs; ++i) {
1317                 Imap->flags[i] = Imap->flags[i] & ~IMAP_SELECTED;
1318         }
1319
1320         /*
1321          * Now set it for all specified messages.
1322          */
1323         num_sets = num_tokens(actual_range, ',');
1324         for (s=0; s<num_sets; ++s) {
1325                 extract_token(setstr, actual_range, s, ',', sizeof setstr);
1326
1327                 extract_token(lostr, setstr, 0, ':', sizeof lostr);
1328                 if (num_tokens(setstr, ':') >= 2) {
1329                         extract_token(histr, setstr, 1, ':', sizeof histr);
1330                         if (!strcmp(histr, "*")) snprintf(histr, sizeof histr, "%ld", LONG_MAX);
1331                 }
1332                 else {
1333                         safestrncpy(histr, lostr, sizeof histr);
1334                 }
1335                 lo = atol(lostr);
1336                 hi = atol(histr);
1337
1338                 /* Loop through the array, flipping bits where appropriate */
1339                 for (i = 1; i <= Imap->num_msgs; ++i) {
1340                         if (is_uid) {   /* fetch by sequence number */
1341                                 if ( (Imap->msgids[i-1]>=lo)
1342                                    && (Imap->msgids[i-1]<=hi)) {
1343                                         Imap->flags[i-1] |= IMAP_SELECTED;
1344                                 }
1345                         }
1346                         else {          /* fetch by uid */
1347                                 if ( (i>=lo) && (i<=hi)) {
1348                                         Imap->flags[i-1] |= IMAP_SELECTED;
1349                                 }
1350                         }
1351                 }
1352         }
1353 }
1354
1355
1356
1357 /*
1358  * This function is called by the main command loop.
1359  */
1360 void imap_fetch(int num_parms, ConstStr *Params) {
1361         citimap_command Cmd;
1362         int num_items;
1363
1364         if (num_parms < 4) {
1365                 cprintf("%s BAD invalid parameters\r\n", Params[0].Key);
1366                 return;
1367         }
1368
1369         imap_pick_range(Params[2].Key, 0);
1370
1371         memset(&Cmd, 0, sizeof(citimap_command));
1372         Cmd.CmdBuf = NewStrBufPlain(NULL, StrLength(IMAP->Cmd.CmdBuf));
1373         MakeStringOf(Cmd.CmdBuf, 3);
1374
1375         num_items = imap_extract_data_items(&Cmd);
1376         if (num_items < 1) {
1377                 cprintf("%s BAD invalid data item list\r\n", Params[0].Key);
1378                 FreeStrBuf(&Cmd.CmdBuf);
1379                 free(Cmd.Params);
1380                 return;
1381         }
1382
1383         imap_do_fetch(&Cmd);
1384         cprintf("%s OK FETCH completed\r\n", Params[0].Key);
1385         FreeStrBuf(&Cmd.CmdBuf);
1386         free(Cmd.Params);
1387 }
1388
1389 /*
1390  * This function is called by the main command loop.
1391  */
1392 void imap_uidfetch(int num_parms, ConstStr *Params) {
1393         citimap_command Cmd;
1394         int num_items;
1395         int i;
1396         int have_uid_item = 0;
1397
1398         if (num_parms < 5) {
1399                 cprintf("%s BAD invalid parameters\r\n", Params[0].Key);
1400                 return;
1401         }
1402
1403         imap_pick_range(Params[3].Key, 1);
1404
1405         memset(&Cmd, 0, sizeof(citimap_command));
1406         Cmd.CmdBuf = NewStrBufPlain(NULL, StrLength(IMAP->Cmd.CmdBuf));
1407
1408         MakeStringOf(Cmd.CmdBuf, 4);
1409 #if 0
1410         CtdlLogPrintf(CTDL_DEBUG, "-------%s--------\n", ChrPtr(Cmd.CmdBuf));
1411 #endif
1412         num_items = imap_extract_data_items(&Cmd);
1413         if (num_items < 1) {
1414                 cprintf("%s BAD invalid data item list\r\n", Params[0].Key);
1415                 FreeStrBuf(&Cmd.CmdBuf);
1416                 free(Cmd.Params);
1417                 return;
1418         }
1419
1420         /* If the "UID" item was not included, we include it implicitly
1421          * (at the beginning) because this is a UID FETCH command
1422          */
1423         for (i=0; i<num_items; ++i) {
1424                 if (!strcasecmp(Cmd.Params[i].Key, "UID")) ++have_uid_item;
1425         }
1426         if (have_uid_item == 0) {
1427                 if (Cmd.num_parms + 1 >= Cmd.avail_parms)
1428                         CmdAdjust(&Cmd, Cmd.avail_parms + 1, 1);
1429                 memmove(&Cmd.Params[1],
1430                         &Cmd.Params[0],
1431                         sizeof(ConstStr) * Cmd.num_parms);
1432
1433                 Cmd.num_parms++;
1434                 Cmd.Params[0] = (ConstStr){HKEY("UID")};
1435         }
1436
1437         imap_do_fetch(&Cmd);
1438         cprintf("%s OK UID FETCH completed\r\n", Params[0].Key);
1439         FreeStrBuf(&Cmd.CmdBuf);
1440         free(Cmd.Params);
1441 }
1442
1443