libcitadel/lib/mime_parser.c

   1 /*
   2  * $Id$
   3  *
   4  * This is the MIME parser for Citadel.
   5  *
   6  * Copyright (c) 1998-2007 by the citadel.org development team.
   7  * This code is distributed under the GNU General Public License v3.
   8  *
   9  */
  10
  11 #include <stdlib.h>
  12 #include <unistd.h>
  13 #include <stdio.h>
  14 #include <signal.h>
  15 #include <sys/types.h>
  16 #include <ctype.h>
  17 #include <string.h>
  18 #include <sys/stat.h>
  19 #include <sys/types.h>
  20 #include <dirent.h>
  21 #include <errno.h>
  22
  23 #include "xdgmime/xdgmime.h"
  24 #include "libcitadel.h"
  25
  26 void extract_key(char *target, char *source, char *key)
  27 {
  28         char *ptr;
  29         char looking_for[256];
  30         int double_quotes = 0;
  31
  32         snprintf(looking_for, sizeof looking_for, "%s=", key);
  33
  34         ptr = bmstrcasestr(source, looking_for);
  35         if (ptr == NULL) {
  36                 strcpy(target, "");
  37                 return;
  38         }
  39         strcpy(target, (ptr + strlen(looking_for)));
  40
  41         for (ptr=target; (*ptr != 0); ++ptr) {
  42
  43                 /* A semicolon means we've hit the end of the key, unless we're inside double quotes */
  44                 if ( (double_quotes != 1) && (*ptr == ';')) {
  45                         *ptr = 0;
  46                 }
  47
  48                 /* if we find double quotes, we've got a great set of string boundaries */
  49                 if (*ptr == '\"') {
  50                         ++double_quotes;
  51                         if (double_quotes == 1) {
  52                                 strcpy(ptr, ptr+1);
  53                         }
  54                         else {
  55                                 *ptr = 0;
  56                         }
  57                 }
  58         }
  59 }
  60
  61
  62 /*
  63  * For non-multipart messages, we need to generate a quickie partnum of "1"
  64  * to return to callback functions.  Some callbacks demand it.
  65  */
  66 char *fixed_partnum(char *supplied_partnum) {
  67         if (supplied_partnum == NULL) return "1";
  68         if (strlen(supplied_partnum)==0) return "1";
  69         return supplied_partnum;
  70 }
  71
  72
  73
  74 /*
  75  * Convert "quoted-printable" to binary.  Returns number of bytes decoded.
  76  * according to RFC2045 section 6.7
  77  */
  78 int CtdlDecodeQuotedPrintable(char *decoded, char *encoded, int sourcelen) {
  79         unsigned int ch;
  80         int decoded_length = 0;
  81         int pos = 0;
  82
  83         while (pos < sourcelen)
  84         {
  85                 if (!strncmp(&encoded[pos], "=\r\n", 3))
  86                 {
  87                         pos += 3;
  88                 }
  89                 else if (!strncmp(&encoded[pos], "=\n", 2))
  90                 {
  91                         pos += 2;
  92                 }
  93                 else if (encoded[pos] == '=')
  94                 {
  95                         ch = 0;
  96                         sscanf(&encoded[pos+1], "%02x", &ch);
  97                         pos += 3;
  98                         decoded[decoded_length++] = ch;
  99                 }
 100                 else
 101                 {
 102                         decoded[decoded_length++] = encoded[pos];
 103                         pos += 1;
 104                 }
 105         }
 106         decoded[decoded_length] = 0;
 107         return(decoded_length);
 108 }
 109
 110
 111 /*
 112  * Given a message or message-part body and a length, handle any necessary
 113  * decoding and pass the request up the stack.
 114  */
 115 void mime_decode(char *partnum,
 116                  char *part_start, size_t length,
 117                  char *content_type, char *charset, char *encoding,
 118                  char *disposition,
 119                  char *id,
 120                  char *name, char *filename,
 121                  void (*CallBack)
 122                   (char *cbname,
 123                    char *cbfilename,
 124                    char *cbpartnum,
 125                    char *cbdisp,
 126                    void *cbcontent,
 127                    char *cbtype,
 128                    char *cbcharset,
 129                    size_t cblength,
 130                    char *cbencoding,
 131                    char *cbid,
 132                    void *cbuserdata),
 133                  void (*PreMultiPartCallBack)
 134                   (char *cbname,
 135                    char *cbfilename,
 136                    char *cbpartnum,
 137                    char *cbdisp,
 138                    void *cbcontent,
 139                    char *cbtype,
 140                    char *cbcharset,
 141                    size_t cblength,
 142                    char *cbencoding,
 143                    char *cbid,
 144                    void *cbuserdata),
 145                  void (*PostMultiPartCallBack)
 146                   (char *cbname,
 147                    char *cbfilename,
 148                    char *cbpartnum,
 149                    char *cbdisp,
 150                    void *cbcontent,
 151                    char *cbtype,
 152                    char *cbcharset,
 153                    size_t cblength,
 154                    char *cbencoding,
 155                    char *cbid,
 156                    void *cbuserdata),
 157                   void *userdata,
 158                   int dont_decode
 159 )
 160 {
 161
 162         char *decoded;
 163         size_t bytes_decoded = 0;
 164
 165         /* Some encodings aren't really encodings */
 166         if (!strcasecmp(encoding, "7bit"))
 167                 strcpy(encoding, "");
 168         if (!strcasecmp(encoding, "8bit"))
 169                 strcpy(encoding, "");
 170         if (!strcasecmp(encoding, "binary"))
 171                 strcpy(encoding, "");
 172
 173         /* If this part is not encoded, send as-is */
 174         if ( (strlen(encoding) == 0) || (dont_decode)) {
 175                 if (CallBack != NULL) {
 176                         CallBack(name, filename, fixed_partnum(partnum),
 177                                 disposition, part_start,
 178                                 content_type, charset, length, encoding, id, userdata);
 179                         }
 180                 return;
 181         }
 182
 183         /* Fail silently if we hit an unknown encoding. */
 184         if ((strcasecmp(encoding, "base64"))
 185             && (strcasecmp(encoding, "quoted-printable"))) {
 186                 return;
 187         }
 188
 189         /*
 190          * Allocate a buffer for the decoded data.  The output buffer is slightly
 191          * larger than the input buffer; this assumes that the decoded data
 192          * will never be significantly larger than the encoded data.  This is a
 193          * safe assumption with base64, uuencode, and quoted-printable.
 194          */
 195         decoded = malloc(length + 32768);
 196         if (decoded == NULL) {
 197                 return;
 198         }
 199
 200         if (!strcasecmp(encoding, "base64")) {
 201                 bytes_decoded = CtdlDecodeBase64(decoded, part_start, length);
 202         }
 203         else if (!strcasecmp(encoding, "quoted-printable")) {
 204                 bytes_decoded = CtdlDecodeQuotedPrintable(decoded, part_start, length);
 205         }
 206
 207         if (bytes_decoded > 0) if (CallBack != NULL) {
 208                 CallBack(name, filename, fixed_partnum(partnum),
 209                         disposition, decoded,
 210                         content_type, charset, bytes_decoded, "binary", id, userdata);
 211         }
 212
 213         free(decoded);
 214 }
 215
 216 /*
 217  * Break out the components of a multipart message
 218  * (This function expects to be fed HEADERS + CONTENT)
 219  * Note: NULL can be supplied as content_end; in this case, the message is
 220  * considered to have ended when the parser encounters a 0x00 byte.
 221  */
 222 void the_mime_parser(char *partnum,
 223                      char *content_start, char *content_end,
 224                      void (*CallBack)
 225                       (char *cbname,
 226                        char *cbfilename,
 227                        char *cbpartnum,
 228                        char *cbdisp,
 229                        void *cbcontent,
 230                        char *cbtype,
 231                        char *cbcharset,
 232                        size_t cblength,
 233                        char *cbencoding,
 234                        char *cbid,
 235                        void *cbuserdata),
 236                      void (*PreMultiPartCallBack)
 237                       (char *cbname,
 238                        char *cbfilename,
 239                        char *cbpartnum,
 240                        char *cbdisp,
 241                        void *cbcontent,
 242                        char *cbtype,
 243                        char *cbcharset,
 244                        size_t cblength,
 245                        char *cbencoding,
 246                        char *cbid,
 247                        void *cbuserdata),
 248                      void (*PostMultiPartCallBack)
 249                       (char *cbname,
 250                        char *cbfilename,
 251                        char *cbpartnum,
 252                        char *cbdisp,
 253                        void *cbcontent,
 254                        char *cbtype,
 255                        char *cbcharset,
 256                        size_t cblength,
 257                        char *cbencoding,
 258                        char *cbid,
 259                        void *cbuserdata),
 260                       void *userdata,
 261                       int dont_decode
 262 )
 263 {
 264
 265         char *ptr;
 266         char *srch = NULL;
 267         char *part_start, *part_end = NULL;
 268         char buf[SIZ];
 269         char *header;
 270         char *boundary;
 271         char *startary;
 272         size_t startary_len = 0;
 273         char *endary;
 274         char *next_boundary;
 275         char *content_type;
 276         char *charset;
 277         size_t content_length;
 278         char *encoding;
 279         char *disposition;
 280         char *id;
 281         char *name = NULL;
 282         char *content_type_name;
 283         char *content_disposition_name;
 284         char *filename;
 285         int is_multipart;
 286         int part_seq = 0;
 287         int i;
 288         size_t length;
 289         char nested_partnum[256];
 290         int crlf_in_use = 0;
 291         char *evaluate_crlf_ptr = NULL;
 292         int buflen = 0;
 293         int headerlen = 0;
 294
 295         ptr = content_start;
 296         content_length = 0;
 297
 298         boundary = malloc(SIZ);
 299         memset(boundary, 0, SIZ);
 300
 301         startary = malloc(SIZ);
 302         memset(startary, 0, SIZ);
 303
 304         endary = malloc(SIZ);
 305         memset(endary, 0, SIZ);
 306
 307         header = malloc(SIZ);
 308         memset(header, 0, SIZ);
 309
 310         content_type = malloc(SIZ);
 311         memset(content_type, 0, SIZ);
 312
 313         charset = malloc(SIZ);
 314         memset(charset, 0, SIZ);
 315
 316         encoding = malloc(SIZ);
 317         memset(encoding, 0, SIZ);
 318
 319         content_type_name = malloc(SIZ);
 320         memset(content_type_name, 0, SIZ);
 321
 322         content_disposition_name = malloc(SIZ);
 323         memset(content_disposition_name, 0, SIZ);
 324
 325         filename = malloc(SIZ);
 326         memset(filename, 0, SIZ);
 327
 328         disposition = malloc(SIZ);
 329         memset(disposition, 0, SIZ);
 330
 331         id = malloc(SIZ);
 332         memset(id, 0, SIZ);
 333
 334         /* If the caller didn't supply an endpointer, generate one by measure */
 335         if (content_end == NULL) {
 336                 content_end = &content_start[strlen(content_start)];
 337         }
 338
 339         /* Learn interesting things from the headers */
 340         strcpy(header, "");
 341         headerlen = 0;
 342         do {
 343                 ptr = memreadlinelen(ptr, buf, SIZ, &buflen);
 344                 if (ptr >= content_end) {
 345                         goto end_parser;
 346                 }
 347
 348                 for (i = 0; i < buflen; ++i) {
 349                         if (isspace(buf[i])) {
 350                                 buf[i] = ' ';
 351                         }
 352                 }
 353
 354                 if (!isspace(buf[0])) {
 355                         if (!strncasecmp(header, "Content-type:", 13)) {
 356                                 strcpy(content_type, &header[13]);
 357                                 striplt(content_type);
 358                                 extract_key(content_type_name, content_type, "name");
 359                                 extract_key(charset, content_type, "charset");
 360                                 extract_key(boundary, header, "boundary");
 361                                 /* Deal with weird headers */
 362                                 if (strchr(content_type, ' '))
 363                                         *(strchr(content_type, ' ')) = '\0';
 364                                 if (strchr(content_type, ';'))
 365                                         *(strchr(content_type, ';')) = '\0';
 366                         }
 367                         if (!strncasecmp(header, "Content-Disposition:", 20)) {
 368                                 strcpy(disposition, &header[20]);
 369                                 striplt(disposition);
 370                                 extract_key(content_disposition_name, disposition, "name");
 371                                 extract_key(filename, disposition, "filename");
 372                         }
 373                         if (!strncasecmp(header, "Content-ID:", 11)) {
 374                                 strcpy(id, &header[11]);
 375                                 striplt(id);
 376                                 stripallbut(id, '<', '>');
 377                         }
 378                         if (!strncasecmp(header, "Content-length: ", 15)) {
 379                                 char clbuf[10];
 380                                 safestrncpy(clbuf, &header[15], sizeof clbuf);
 381                                 striplt(clbuf);
 382                                 content_length = (size_t) atol(clbuf);
 383                         }
 384                         if (!strncasecmp(header, "Content-transfer-encoding: ", 26)) {
 385                                 strcpy(encoding, &header[26]);
 386                                 striplt(encoding);
 387                         }
 388                         strcpy(header, "");
 389                         headerlen = 0;
 390                 }
 391                 if ((headerlen + buflen + 2) < SIZ) {
 392                         memcpy(&header[headerlen], buf, buflen);
 393                         headerlen += buflen;
 394                         header[headerlen] = '\0';
 395                 }
 396         } while ((!IsEmptyStr(buf)) && (*ptr != 0));
 397
 398         if (strchr(disposition, ';'))
 399                 *(strchr(disposition, ';')) = '\0';
 400         striplt(disposition);
 401         if (strchr(content_type, ';'))
 402                 *(strchr(content_type, ';')) = '\0';
 403         striplt(content_type);
 404
 405         if (!IsEmptyStr(boundary)) {
 406                 is_multipart = 1;
 407         } else {
 408                 is_multipart = 0;
 409         }
 410
 411         /* If this is a multipart message, then recursively process it */
 412         part_start = NULL;
 413         if (is_multipart) {
 414
 415                 /* Tell the client about this message's multipartedness */
 416                 if (PreMultiPartCallBack != NULL) {
 417                         PreMultiPartCallBack("", "", partnum, "",
 418                                 NULL, content_type, charset,
 419                                 0, encoding, id, userdata);
 420                 }
 421
 422                 /* Figure out where the boundaries are */
 423                 snprintf(startary, SIZ, "--%s", boundary);
 424                 snprintf(endary, SIZ, "--%s--", boundary);
 425                 startary_len = strlen(startary);
 426
 427                 part_start = NULL;
 428                 do {
 429                         next_boundary = NULL;
 430                         for (srch=ptr; srch<content_end; ++srch) {
 431                                 if (!memcmp(srch, startary, startary_len)) {
 432                                         next_boundary = srch;
 433                                         srch = content_end;
 434                                 }
 435                         }
 436
 437                         if ( (part_start != NULL) && (next_boundary != NULL) ) {
 438                                 part_end = next_boundary;
 439                                 --part_end;             /* omit the trailing LF */
 440                                 if (crlf_in_use) {
 441                                         --part_end;     /* omit the trailing CR */
 442                                 }
 443
 444                                 if (!IsEmptyStr(partnum)) {
 445                                         snprintf(nested_partnum,
 446                                                  sizeof nested_partnum,
 447                                                  "%s.%d", partnum,
 448                                                  ++part_seq);
 449                                 }
 450                                 else {
 451                                         snprintf(nested_partnum,
 452                                                  sizeof nested_partnum,
 453                                                  "%d", ++part_seq);
 454                                 }
 455                                 the_mime_parser(nested_partnum,
 456                                             part_start, part_end,
 457                                                 CallBack,
 458                                                 PreMultiPartCallBack,
 459                                                 PostMultiPartCallBack,
 460                                                 userdata,
 461                                                 dont_decode);
 462                         }
 463
 464                         if (next_boundary != NULL) {
 465                                 /* If we pass out of scope, don't attempt to
 466                                  * read past the end boundary. */
 467                                 if (!strcmp(next_boundary, endary)) {
 468                                         ptr = content_end;
 469                                 }
 470                                 else {
 471                                         /* Set up for the next part. */
 472                                         part_start = strstr(next_boundary, "\n");
 473
 474                                         /* Determine whether newlines are LF or CRLF */
 475                                         evaluate_crlf_ptr = part_start;
 476                                         --evaluate_crlf_ptr;
 477                                         if (!memcmp(evaluate_crlf_ptr, "\r\n", 2)) {
 478                                                 crlf_in_use = 1;
 479                                         }
 480                                         else {
 481                                                 crlf_in_use = 0;
 482                                         }
 483
 484                                         /* Advance past the LF ... now we're in the next part */
 485                                         ++part_start;
 486                                         ptr = part_start;
 487                                 }
 488                         }
 489                         else {
 490                                 /* Invalid end of multipart.  Bail out! */
 491                                 ptr = content_end;
 492                         }
 493                 } while ( (ptr < content_end) && (next_boundary != NULL) );
 494
 495                 if (PostMultiPartCallBack != NULL) {
 496                         PostMultiPartCallBack("", "", partnum, "", NULL,
 497                                 content_type, charset, 0, encoding, id, userdata);
 498                 }
 499                 goto end_parser;
 500         }
 501
 502         /* If it's not a multipart message, then do something with it */
 503         if (!is_multipart) {
 504                 part_start = ptr;
 505                 length = 0;
 506                 while (ptr < content_end) {
 507                         ++ptr;
 508                         ++length;
 509                 }
 510                 part_end = content_end;
 511
 512
 513                 /* The following code will truncate the MIME part to the size
 514                  * specified by the Content-length: header.   We have commented it
 515                  * out because these headers have a tendency to be wrong.
 516                  *
 517                  *      if ( (content_length > 0) && (length > content_length) ) {
 518                  *              length = content_length;
 519                  *      }
 520                  */
 521
 522                 /* Sometimes the "name" field is tacked on to Content-type,
 523                  * and sometimes it's tacked on to Content-disposition.  Use
 524                  * whichever one we have.
 525                  */
 526                 if (strlen(content_disposition_name) > strlen(content_type_name)) {
 527                         name = content_disposition_name;
 528                 }
 529                 else {
 530                         name = content_type_name;
 531                 }
 532
 533                 /* Ok, we've got a non-multipart part here, so do something with it.
 534                  */
 535                 mime_decode(partnum,
 536                         part_start, length,
 537                         content_type, charset, encoding, disposition, id,
 538                         name, filename,
 539                         CallBack, NULL, NULL,
 540                         userdata, dont_decode
 541                 );
 542
 543                 /*
 544                  * Now if it's an encapsulated message/rfc822 then we have to recurse into it
 545                  */
 546                 if (!strcasecmp(content_type, "message/rfc822")) {
 547
 548                         if (PreMultiPartCallBack != NULL) {
 549                                 PreMultiPartCallBack("", "", partnum, "",
 550                                         NULL, content_type, charset,
 551                                         0, encoding, id, userdata);
 552                         }
 553                         if (CallBack != NULL) {
 554                                 if (strlen(partnum) > 0) {
 555                                         snprintf(nested_partnum,
 556                                                  sizeof nested_partnum,
 557                                                  "%s.%d", partnum,
 558                                                  ++part_seq);
 559                                 }
 560                                 else {
 561                                         snprintf(nested_partnum,
 562                                                  sizeof nested_partnum,
 563                                                  "%d", ++part_seq);
 564                                 }
 565                                 the_mime_parser(nested_partnum,
 566                                         part_start, part_end,
 567                                         CallBack,
 568                                         PreMultiPartCallBack,
 569                                         PostMultiPartCallBack,
 570                                         userdata,
 571                                         dont_decode
 572                                 );
 573                         }
 574                         if (PostMultiPartCallBack != NULL) {
 575                                 PostMultiPartCallBack("", "", partnum, "", NULL,
 576                                         content_type, charset, 0, encoding, id, userdata);
 577                         }
 578
 579
 580                 }
 581
 582         }
 583
 584 end_parser:     /* free the buffers!  end the oppression!! */
 585         free(boundary);
 586         free(startary);
 587         free(endary);
 588         free(header);
 589         free(content_type);
 590         free(charset);
 591         free(encoding);
 592         free(content_type_name);
 593         free(content_disposition_name);
 594         free(filename);
 595         free(disposition);
 596         free(id);
 597 }
 598
 599
 600
 601 /*
 602  * Entry point for the MIME parser.
 603  * (This function expects to be fed HEADERS + CONTENT)
 604  * Note: NULL can be supplied as content_end; in this case, the message is
 605  * considered to have ended when the parser encounters a 0x00 byte.
 606  */
 607 void mime_parser(char *content_start,
 608                 char *content_end,
 609
 610                  void (*CallBack)
 611                   (char *cbname,
 612                    char *cbfilename,
 613                    char *cbpartnum,
 614                    char *cbdisp,
 615                    void *cbcontent,
 616                    char *cbtype,
 617                    char *cbcharset,
 618                    size_t cblength,
 619                    char *cbencoding,
 620                    char *cbid,
 621                    void *cbuserdata),
 622
 623                  void (*PreMultiPartCallBack)
 624                   (char *cbname,
 625                    char *cbfilename,
 626                    char *cbpartnum,
 627                    char *cbdisp,
 628                    void *cbcontent,
 629                    char *cbtype,
 630                    char *cbcharset,
 631                    size_t cblength,
 632                    char *cbencoding,
 633                    char *cbid,
 634                    void *cbuserdata),
 635
 636                  void (*PostMultiPartCallBack)
 637                   (char *cbname,
 638                    char *cbfilename,
 639                    char *cbpartnum,
 640                    char *cbdisp,
 641                    void *cbcontent,
 642                    char *cbtype,
 643                    char *cbcharset,
 644                    size_t cblength,
 645                    char *cbencoding,
 646                    char *cbid,
 647                    void *cbuserdata),
 648
 649                   void *userdata,
 650                   int dont_decode
 651 )
 652 {
 653
 654         the_mime_parser("", content_start, content_end,
 655                         CallBack,
 656                         PreMultiPartCallBack,
 657                         PostMultiPartCallBack,
 658                         userdata, dont_decode);
 659 }
 660
 661
 662
 663
 664
 665
 666 typedef struct _MimeGuess {
 667         const char *Pattern;
 668         size_t PatternLen;
 669         long PatternOffset;
 670         const char *MimeString;
 671 } MimeGuess;
 672
 673 MimeGuess MyMimes [] = {
 674         {
 675                 "GIF",
 676                 3,
 677                 0,
 678                 "image/gif"
 679         },
 680         {
 681                 "\xff\xd8",
 682                 2,
 683                 0,
 684                 "image/jpeg"
 685         },
 686         {
 687                 "\x89PNG",
 688                 4,
 689                 0,
 690                 "image/png"
 691         },
 692         { // last...
 693                 "",
 694                 0,
 695                 0,
 696                 ""
 697         }
 698 };
 699
 700
 701 const char *GuessMimeType(const char *data, size_t dlen)
 702 {
 703         int MimeIndex = 0;
 704
 705         while (MyMimes[MimeIndex].PatternLen != 0)
 706         {
 707                 if ((MyMimes[MimeIndex].PatternLen +
 708                      MyMimes[MimeIndex].PatternOffset < dlen) &&
 709                     strncmp(MyMimes[MimeIndex].Pattern,
 710                             &data[MyMimes[MimeIndex].PatternOffset],
 711                             MyMimes[MimeIndex].PatternLen) == 0)
 712                 {
 713                         return MyMimes[MimeIndex].MimeString;
 714                 }
 715                 MimeIndex ++;
 716         }
 717         /*
 718          * ok, our simple minded algorythm didn't find anything,
 719          * let the big chegger try it, he wil default to application/octet-stream
 720          */
 721         return (xdg_mime_get_mime_type_for_data(data, dlen));
 722 }
 723
 724
 725 const char* GuessMimeByFilename(const char *what, size_t len)
 726 {
 727         /* we know some hardcoded on our own, try them... */
 728         if (!strncasecmp(&what[len - 4], ".gif", 4))
 729                 return "image/gif";
 730         else if (!strncasecmp(&what[len - 3], ".js", 3))
 731                 return  "text/javascript";
 732         else if (!strncasecmp(&what[len - 4], ".txt", 4))
 733                 return "text/plain";
 734         else if (!strncasecmp(&what[len - 4], ".css", 4))
 735                 return "text/css";
 736         else if (!strncasecmp(&what[len - 4], ".jpg", 4))
 737                 return "image/jpeg";
 738         else if (!strncasecmp(&what[len - 4], ".png", 4))
 739                 return "image/png";
 740         else if (!strncasecmp(&what[len - 4], ".ico", 4))
 741                 return "image/x-icon";
 742         else if (!strncasecmp(&what[len - 5], ".html", 5))
 743                 return "text/html";
 744         else if (!strncasecmp(&what[len - 4], ".htm", 4))
 745                 return "text/html";
 746         else if (!strncasecmp(&what[len - 4], ".wml", 4))
 747                 return "text/vnd.wap.wml";
 748         else if (!strncasecmp(&what[len - 5], ".wmls", 5))
 749                 return "text/vnd.wap.wmlscript";
 750         else if (!strncasecmp(&what[len - 5], ".wmlc", 5))
 751                 return "application/vnd.wap.wmlc";
 752         else if (!strncasecmp(&what[len - 6], ".wmlsc", 6))
 753                 return "application/vnd.wap.wmlscriptc";
 754         else if (!strncasecmp(&what[len - 5], ".wbmp", 5))
 755                 return "image/vnd.wap.wbmp";
 756         else
 757                 /* and let xdgmime do the fallback. */
 758                 return xdg_mime_get_mime_type_from_file_name(what);
 759 }
 760
 761 static HashList *IconHash = NULL;
 762
 763 typedef struct IconName IconName;
 764
 765 struct IconName {
 766         char *FlatName;
 767         char *FileName;
 768 };
 769
 770 static void DeleteIcon(void *IconNamePtr)
 771 {
 772         IconName *Icon = (IconName*) IconNamePtr;
 773         free(Icon->FlatName);
 774         free(Icon->FileName);
 775         free(Icon);
 776 }
 777
 778 /*
 779 static const char *PrintFlat(void *IconNamePtr)
 780 {
 781         IconName *Icon = (IconName*) IconNamePtr;
 782         return Icon->FlatName;
 783 }
 784 static const char *PrintFile(void *IconNamePtr)
 785 {
 786         IconName *Icon = (IconName*) IconNamePtr;
 787         return Icon->FileName;
 788 }
 789 */
 790
 791 #define GENSTR "x-generic"
 792 #define IGNORE_PREFIX_1 "gnome-mime"
 793 int LoadIconDir(const char *DirName)
 794 {
 795         DIR *filedir = NULL;
 796         struct dirent *filedir_entry;
 797         int d_namelen;
 798         int d_without_ext;
 799         IconName *Icon;
 800
 801         filedir = opendir (DirName);
 802         IconHash = NewHash(1, NULL);
 803         if (filedir == NULL) {
 804                 return 0;
 805         }
 806
 807         while ((filedir_entry = readdir(filedir)))
 808         {
 809                 char *MinorPtr;
 810                 char *PStart;
 811 #ifdef _DIRENT_HAVE_D_NAMELEN
 812                 d_namelen = filedir_entry->d_namelen;
 813 #else
 814                 d_namelen = strlen(filedir_entry->d_name);
 815 #endif
 816                 d_without_ext = d_namelen;
 817                 while ((d_without_ext > 0) && (filedir_entry->d_name[d_without_ext] != '.'))
 818                         d_without_ext --;
 819                 if ((d_without_ext == 0) || (d_namelen < 3))
 820                         continue;
 821
 822                 if ((sizeof(IGNORE_PREFIX_1) < d_namelen) &&
 823                     (strncmp(IGNORE_PREFIX_1,
 824                              filedir_entry->d_name,
 825                              sizeof(IGNORE_PREFIX_1) - 1) == 0)) {
 826                         PStart = filedir_entry->d_name + sizeof(IGNORE_PREFIX_1);
 827                         d_without_ext -= sizeof(IGNORE_PREFIX_1);
 828                 }
 829                 else {
 830                         PStart = filedir_entry->d_name;
 831                 }
 832                 Icon = malloc(sizeof(IconName));
 833
 834                 Icon->FileName = malloc(d_namelen + 1);
 835                 memcpy(Icon->FileName, filedir_entry->d_name, d_namelen + 1);
 836
 837                 Icon->FlatName = malloc(d_without_ext + 1);
 838                 memcpy(Icon->FlatName, PStart, d_without_ext);
 839                 Icon->FlatName[d_without_ext] = '\0';
 840                 /* Try to find Minor type in image-jpeg */
 841                 MinorPtr = strchr(Icon->FlatName, '-');
 842                 if (MinorPtr != NULL) {
 843                         size_t MinorLen;
 844                         MinorLen = 1 + d_without_ext - (MinorPtr - Icon->FlatName + 1);
 845                         if ((MinorLen == sizeof(GENSTR)) &&
 846                             (strncmp(MinorPtr + 1, GENSTR, sizeof(GENSTR)) == 0)) {
 847                                 /* ok, we found a generic filename. cut the generic. */
 848                                 *MinorPtr = '\0';
 849                                 d_without_ext = d_without_ext - (MinorPtr - Icon->FlatName);
 850                         }
 851                         else { /* Map the major / minor separator to / */
 852                                 *MinorPtr = '/';
 853                         }
 854                 }
 855
 856 //              PrintHash(IconHash, PrintFlat, PrintFile);
 857 //              printf("%s - %s\n", Icon->FlatName, Icon->FileName);
 858                 Put(IconHash, Icon->FlatName, d_without_ext, Icon, DeleteIcon);
 859 //              PrintHash(IconHash, PrintFlat, PrintFile);
 860         }
 861         closedir(filedir);
 862         return 1;
 863 }
 864
 865 const char *GetIconFilename(char *MimeType, size_t len)
 866 {
 867         void *vIcon;
 868         IconName *Icon;
 869
 870         if(IconHash == NULL)
 871                 return NULL;
 872
 873         GetHash(IconHash, MimeType, len, &vIcon), Icon = (IconName*) vIcon;
 874         /* didn't find the exact mimetype? try major only. */
 875         if (Icon == NULL) {
 876                 char * pMinor;
 877                 pMinor = strchr(MimeType, '/');
 878                 if (pMinor != NULL) {
 879                         *pMinor = '\0';
 880                         GetHash(IconHash, MimeType, pMinor - MimeType, &vIcon),
 881                                 Icon = (IconName*) vIcon;
 882                 }
 883         }
 884         if (Icon == NULL) {
 885                 return NULL;
 886         }
 887
 888         /*printf("Getting: [%s] == [%s] -> [%s]\n", MimeType, Icon->FlatName, Icon->FileName);*/
 889         return Icon->FileName;
 890 }
 891
 892 void ShutDownLibCitadel(void)
 893 {
 894         DeleteHash(&IconHash);
 895 }