src/procheader.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2014 Hiroyuki Yamamoto and the Claws Mail team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #include "claws-features.h"
  23 #endif
  24
  25 #include <glib.h>
  26 #include <glib/gi18n.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <stdlib.h>
  30 #include <time.h>
  31 #include <sys/stat.h>
  32
  33 #ifdef G_OS_WIN32
  34 #  include <w32lib.h>
  35 #endif
  36
  37 #include "procheader.h"
  38 #include "procmsg.h"
  39 #include "codeconv.h"
  40 #include "prefs_common.h"
  41 #include "hooks.h"
  42 #include "utils.h"
  43 #include "defs.h"
  44 #include "file-utils.h"
  45
  46 #define BUFFSIZE        8192
  47
  48 static gchar monthstr[] = "JanFebMarAprMayJunJulAugSepOctNovDec";
  49
  50 typedef char *(*getlinefunc) (char *, size_t, void *);
  51 typedef int (*peekcharfunc) (void *);
  52 typedef int (*getcharfunc) (void *);
  53 typedef gint (*get_one_field_func) (gchar **, void *, HeaderEntry[]);
  54
  55 static gint string_get_one_field(gchar **buf, char **str,
  56                                  HeaderEntry hentry[]);
  57
  58 static char *string_getline(char *buf, size_t len, char **str);
  59 static int string_peekchar(char **str);
  60 static int file_peekchar(FILE *fp);
  61 static gint generic_get_one_field(gchar **bufptr, void *data,
  62                                   HeaderEntry hentry[],
  63                                   getlinefunc getline,
  64                                   peekcharfunc peekchar,
  65                                   gboolean unfold);
  66 static MsgInfo *parse_stream(void *data, gboolean isstring, MsgFlags flags,
  67                              gboolean full, gboolean decrypted);
  68
  69
  70 gint procheader_get_one_field(gchar **buf, FILE *fp,
  71                               HeaderEntry hentry[])
  72 {
  73         return generic_get_one_field(buf, fp, hentry,
  74                                      (getlinefunc)fgets_crlf, (peekcharfunc)file_peekchar,
  75                                      TRUE);
  76 }
  77
  78 static gint string_get_one_field(gchar **buf, char **str,
  79                                  HeaderEntry hentry[])
  80 {
  81         return generic_get_one_field(buf, str, hentry,
  82                                      (getlinefunc)string_getline,
  83                                      (peekcharfunc)string_peekchar,
  84                                      TRUE);
  85 }
  86
  87 gboolean procheader_skip_headers(FILE *fp)
  88 {
  89         gchar *buf = g_malloc(BUFFSIZE);
  90         do {
  91                 if (fgets_crlf(buf, BUFFSIZE - 1, fp) == NULL) {
  92                         g_free(buf);
  93                         return FALSE;
  94                 }
  95                 if (buf[0] == '\r' || buf[0] == '\n') {
  96                         break;
  97                 }
  98         } while (TRUE);
  99         g_free(buf);
 100
 101         return TRUE;
 102 }
 103
 104
 105 static char *string_getline(char *buf, size_t len, char **str)
 106 {
 107         gboolean is_cr = FALSE;
 108         gboolean last_was_cr = FALSE;
 109
 110         if (!*str || !**str)
 111                 return NULL;
 112
 113         for (; **str && len > 1; --len) {
 114                 is_cr = (**str == '\r');
 115                 if ((*buf++ = *(*str)++) == '\n') {
 116                     break;
 117                 }
 118                 if (last_was_cr) {
 119                         *(--buf) = '\n';
 120                         buf++;
 121                     break;
 122                 }
 123                 last_was_cr = is_cr;
 124         }
 125
 126         *buf = '\0';
 127
 128         return buf;
 129 }
 130
 131 static int string_peekchar(char **str)
 132 {
 133         return **str;
 134 }
 135
 136 static int file_peekchar(FILE *fp)
 137 {
 138         return ungetc(getc(fp), fp);
 139 }
 140
 141 static gint generic_get_one_field(gchar **bufptr, void *data,
 142                           HeaderEntry *hentry,
 143                           getlinefunc getline, peekcharfunc peekchar,
 144                           gboolean unfold)
 145 {
 146         /* returns -1 in case of failure of any kind, whatever it's a parsing error
 147            or an allocation error. if returns -1, *bufptr is always NULL, and vice-versa,
 148            and if returning 0 (OK), *bufptr is always non-NULL, so callers just have to
 149            test the return value
 150         */
 151         gint nexthead;
 152         gint hnum = 0;
 153         HeaderEntry *hp = NULL;
 154         size_t len;
 155         gchar *buf;
 156
 157         cm_return_val_if_fail(bufptr != NULL, -1);
 158
 159         len = BUFFSIZE;
 160         buf = g_malloc(len);
 161
 162         if (hentry != NULL) {
 163                 /* skip non-required headers */
 164                 /* and get hentry header line */
 165                 do {
 166                         do {
 167                                 if (getline(buf, len, data) == NULL) {
 168                                         debug_print("generic_get_one_field: getline\n");
 169                                         g_free(buf);
 170                                         *bufptr = NULL;
 171                                         return -1;
 172                                 }
 173                                 if (buf[0] == '\r' || buf[0] == '\n') {
 174                                         debug_print("generic_get_one_field: empty line\n");
 175                                         g_free(buf);
 176                                         *bufptr = NULL;
 177                                         return -1;
 178                                 }
 179                         } while (buf[0] == ' ' || buf[0] == '\t');
 180
 181                         for (hp = hentry, hnum = 0; hp->name != NULL;
 182                              hp++, hnum++) {
 183                                 if (!g_ascii_strncasecmp(hp->name, buf,
 184                                                  strlen(hp->name)))
 185                                         break;
 186                         }
 187                 } while (hp->name == NULL);
 188         } else {
 189                 /* read first line */
 190                 if (getline(buf, len, data) == NULL) {
 191                         debug_print("generic_get_one_field: getline\n");
 192                         g_free(buf);
 193                         *bufptr = NULL;
 194                         return -1;
 195                 }
 196                 if (buf[0] == '\r' || buf[0] == '\n') {
 197                         debug_print("generic_get_one_field: empty line\n");
 198                         g_free(buf);
 199                         *bufptr = NULL;
 200                         return -1;
 201                 }
 202         }
 203         /* reduce initial buffer to its useful part */
 204         len = strlen(buf)+1;
 205         buf = g_realloc(buf, len);
 206         if (buf == NULL) {
 207                 debug_print("generic_get_one_field: reallocation error\n");
 208                 *bufptr = NULL;
 209                 return -1;
 210         }
 211
 212         /* unfold line */
 213         while (1) {
 214                 nexthead = peekchar(data);
 215                 /* ([*WSP CRLF] 1*WSP) */
 216                 if (nexthead == ' ' || nexthead == '\t') {
 217                         size_t buflen;
 218                         gchar *tmpbuf;
 219                         size_t tmplen;
 220
 221                         gboolean skiptab = (nexthead == '\t');
 222                         /* trim previous trailing \n if requesting one header or
 223                          * unfolding was requested */
 224                         if ((!hentry && unfold) || (hp && hp->unfold))
 225                                 strretchomp(buf);
 226
 227                         buflen = strlen(buf);
 228
 229                         /* read next line */
 230                         tmpbuf = g_malloc(BUFFSIZE);
 231
 232                         if (getline(tmpbuf, BUFFSIZE, data) == NULL) {
 233                                 g_free(tmpbuf);
 234                                 break;
 235                         }
 236                         tmplen = strlen(tmpbuf)+1;
 237
 238                         /* extend initial buffer and concatenate next line */
 239                         len += tmplen;
 240                         buf = g_realloc(buf, len);
 241                         if (buf == NULL) {
 242                                 debug_print("generic_get_one_field: reallocation error\n");
 243                                 g_free(buf);
 244                                 *bufptr = NULL;
 245                                 return -1;
 246                         }
 247                         memcpy(buf+buflen, tmpbuf, tmplen);
 248                         g_free(tmpbuf);
 249                         if (skiptab) { /* replace tab with space */
 250                                 *(buf + buflen) = ' ';
 251                         }
 252                 } else {
 253                         /* remove trailing new line */
 254                         strretchomp(buf);
 255                         break;
 256                 }
 257         }
 258
 259         *bufptr = buf;
 260
 261         return hnum;
 262 }
 263
 264 gint procheader_get_one_field_asis(gchar **buf, FILE *fp)
 265 {
 266         return generic_get_one_field(buf, fp, NULL,
 267                                      (getlinefunc)fgets_crlf,
 268                                      (peekcharfunc)file_peekchar,
 269                                      FALSE);
 270 }
 271
 272 GPtrArray *procheader_get_header_array_asis(FILE *fp)
 273 {
 274         gchar *buf = NULL;
 275         GPtrArray *headers;
 276         Header *header;
 277
 278         cm_return_val_if_fail(fp != NULL, NULL);
 279
 280         headers = g_ptr_array_new();
 281
 282         while (procheader_get_one_field_asis(&buf, fp) != -1) {
 283                 if ((header = procheader_parse_header(buf)) != NULL)
 284                         g_ptr_array_add(headers, header);
 285                 g_free(buf);
 286                 buf = NULL;
 287         }
 288
 289         return headers;
 290 }
 291
 292 void procheader_header_array_destroy(GPtrArray *harray)
 293 {
 294         gint i;
 295         Header *header;
 296
 297         cm_return_if_fail(harray != NULL);
 298
 299         for (i = 0; i < harray->len; i++) {
 300                 header = g_ptr_array_index(harray, i);
 301                 procheader_header_free(header);
 302         }
 303
 304         g_ptr_array_free(harray, TRUE);
 305 }
 306
 307 void procheader_header_free(Header *header)
 308 {
 309         if (!header) return;
 310
 311         g_free(header->name);
 312         g_free(header->body);
 313         g_free(header);
 314 }
 315
 316 /*
 317   tests whether two headers' names are equal
 318   remove the trailing ':' or ' ' before comparing
 319 */
 320
 321 gboolean procheader_headername_equal(char * hdr1, char * hdr2)
 322 {
 323         int len1;
 324         int len2;
 325
 326         len1 = strlen(hdr1);
 327         len2 = strlen(hdr2);
 328         if (hdr1[len1 - 1] == ':')
 329                 len1--;
 330         if (hdr2[len2 - 1] == ':')
 331                 len2--;
 332         if (len1 != len2)
 333                 return 0;
 334
 335         return (g_ascii_strncasecmp(hdr1, hdr2, len1) == 0);
 336 }
 337
 338 /*
 339   parse headers, for example :
 340   From: dinh@enseirb.fr becomes :
 341   header->name = "From:"
 342   header->body = "dinh@enseirb.fr"
 343  */
 344 static gboolean header_is_addr_field(const gchar *hdr)
 345 {
 346         static char *addr_headers[] = {
 347                                 "To:",
 348                                 "Cc:",
 349                                 "Bcc:",
 350                                 "From:",
 351                                 "Reply-To:",
 352                                 "Followup-To:",
 353                                 "Followup-and-Reply-To:",
 354                                 "Disposition-Notification-To:",
 355                                 "Return-Receipt-To:",
 356                                 NULL};
 357         int i;
 358
 359         if (!hdr)
 360                 return FALSE;
 361
 362         for (i = 0; addr_headers[i] != NULL; i++)
 363                 if (!strcasecmp(hdr, addr_headers[i]))
 364                         return FALSE;
 365
 366         return FALSE;
 367 }
 368
 369 Header * procheader_parse_header(gchar * buf)
 370 {
 371         gchar *p;
 372         Header * header;
 373         gboolean addr_field = FALSE;
 374
 375         cm_return_val_if_fail(buf != NULL, NULL);
 376
 377         if ((*buf == ':') || (*buf == ' '))
 378                 return NULL;
 379
 380         for (p = buf; *p ; p++) {
 381                 if ((*p == ':') || (*p == ' ')) {
 382                         header = g_new(Header, 1);
 383                         header->name = g_strndup(buf, p - buf + 1);
 384                         addr_field = header_is_addr_field(header->name);
 385                         p++;
 386                         while (*p == ' ' || *p == '\t') p++;
 387                         header->body = conv_unmime_header(p, NULL, addr_field);
 388                         return header;
 389                 }
 390         }
 391         return NULL;
 392 }
 393
 394 void procheader_get_header_fields(FILE *fp, HeaderEntry hentry[])
 395 {
 396         gchar *buf = NULL;
 397         HeaderEntry *hp;
 398         gint hnum;
 399         gchar *p;
 400
 401         if (hentry == NULL) return;
 402
 403         while ((hnum = procheader_get_one_field(&buf, fp, hentry)) != -1) {
 404                 hp = hentry + hnum;
 405
 406                 p = buf + strlen(hp->name);
 407                 while (*p == ' ' || *p == '\t') p++;
 408
 409                 if (hp->body == NULL)
 410                         hp->body = g_strdup(p);
 411                 else if (procheader_headername_equal(hp->name, "To") ||
 412                          procheader_headername_equal(hp->name, "Cc")) {
 413                         gchar *tp = hp->body;
 414                         hp->body = g_strconcat(tp, ", ", p, NULL);
 415                         g_free(tp);
 416                 }
 417                 g_free(buf);
 418                 buf = NULL;
 419         }
 420 }
 421
 422 MsgInfo *procheader_parse_file(const gchar *file, MsgFlags flags,
 423                                gboolean full, gboolean decrypted)
 424 {
 425 #ifdef G_OS_WIN32
 426         GFile *f;
 427         GFileInfo *fi;
 428         GTimeVal tv;
 429         GError *error = NULL;
 430 #else
 431         GStatBuf s;
 432 #endif
 433         FILE *fp;
 434         MsgInfo *msginfo;
 435
 436 #ifdef G_OS_WIN32
 437         f = g_file_new_for_path(file);
 438         fi = g_file_query_info(f, "standard::size,standard::type,time::modified",
 439                         G_FILE_QUERY_INFO_NONE, NULL, &error);
 440         if (error != NULL) {
 441                 g_warning(error->message);
 442                 g_error_free(error);
 443                 g_object_unref(f);
 444         }
 445 #else
 446         if (g_stat(file, &s) < 0) {
 447                 FILE_OP_ERROR(file, "stat");
 448                 return NULL;
 449         }
 450 #endif
 451
 452 #ifdef G_OS_WIN32
 453         if (g_file_info_get_file_type(fi) != G_FILE_TYPE_REGULAR) {
 454                 g_object_unref(fi);
 455                 g_object_unref(f);
 456                 return NULL;
 457         }
 458 #else
 459         if (!S_ISREG(s.st_mode))
 460                 return NULL;
 461 #endif
 462
 463         if ((fp = claws_fopen(file, "rb")) == NULL) {
 464                 FILE_OP_ERROR(file, "claws_fopen");
 465                 return NULL;
 466         }
 467
 468         msginfo = procheader_parse_stream(fp, flags, full, decrypted);
 469         claws_fclose(fp);
 470
 471         if (msginfo) {
 472 #ifdef G_OS_WIN32
 473                 msginfo->size = g_file_info_get_size(fi);
 474                 g_file_info_get_modification_time(fi, &tv);
 475                 msginfo->mtime = tv.tv_sec;
 476 #else
 477                 msginfo->size = s.st_size;
 478                 msginfo->mtime = s.st_mtime;
 479 #endif
 480         }
 481
 482 #ifdef G_OS_WIN32
 483         g_object_unref(fi);
 484         g_object_unref(f);
 485 #endif
 486
 487         return msginfo;
 488 }
 489
 490 MsgInfo *procheader_parse_str(const gchar *str, MsgFlags flags, gboolean full,
 491                               gboolean decrypted)
 492 {
 493         return parse_stream(&str, TRUE, flags, full, decrypted);
 494 }
 495
 496 enum
 497 {
 498         H_DATE = 0,
 499         H_FROM,
 500         H_TO,
 501         H_CC,
 502         H_NEWSGROUPS,
 503         H_SUBJECT,
 504         H_MSG_ID,
 505         H_REFERENCES,
 506         H_IN_REPLY_TO,
 507         H_CONTENT_TYPE,
 508         H_SEEN,
 509         H_STATUS,
 510         H_FROM_SPACE,
 511         H_SC_PLANNED_DOWNLOAD,
 512         H_SC_MESSAGE_SIZE,
 513         H_FACE,
 514         H_X_FACE,
 515         H_DISPOSITION_NOTIFICATION_TO,
 516         H_RETURN_RECEIPT_TO,
 517         H_SC_PARTIALLY_RETRIEVED,
 518         H_SC_ACCOUNT_SERVER,
 519         H_SC_ACCOUNT_LOGIN,
 520         H_LIST_POST,
 521         H_LIST_SUBSCRIBE,
 522         H_LIST_UNSUBSCRIBE,
 523         H_LIST_HELP,
 524         H_LIST_ARCHIVE,
 525         H_LIST_OWNER,
 526         H_RESENT_FROM,
 527 };
 528
 529 static HeaderEntry hentry_full[] = {
 530                                    {"Date:",            NULL, FALSE},
 531                                    {"From:",            NULL, TRUE},
 532                                    {"To:",              NULL, TRUE},
 533                                    {"Cc:",              NULL, TRUE},
 534                                    {"Newsgroups:",      NULL, TRUE},
 535                                    {"Subject:",         NULL, TRUE},
 536                                    {"Message-ID:",      NULL, FALSE},
 537                                    {"References:",      NULL, FALSE},
 538                                    {"In-Reply-To:",     NULL, FALSE},
 539                                    {"Content-Type:",    NULL, FALSE},
 540                                    {"Seen:",            NULL, FALSE},
 541                                    {"Status:",          NULL, FALSE},
 542                                    {"From ",            NULL, FALSE},
 543                                    {"SC-Marked-For-Download:", NULL, FALSE},
 544                                    {"SC-Message-Size:", NULL, FALSE},
 545                                    {"Face:",            NULL, FALSE},
 546                                    {"X-Face:",          NULL, FALSE},
 547                                    {"Disposition-Notification-To:", NULL, FALSE},
 548                                    {"Return-Receipt-To:", NULL, FALSE},
 549                                    {"SC-Partially-Retrieved:", NULL, FALSE},
 550                                    {"SC-Account-Server:", NULL, FALSE},
 551                                    {"SC-Account-Login:",NULL, FALSE},
 552                                    {"List-Post:",       NULL, TRUE},
 553                                    {"List-Subscribe:",  NULL, TRUE},
 554                                    {"List-Unsubscribe:",NULL, TRUE},
 555                                    {"List-Help:",       NULL, TRUE},
 556                                    {"List-Archive:",    NULL, TRUE},
 557                                    {"List-Owner:",      NULL, TRUE},
 558                                    {"Resent-From:",     NULL, TRUE},
 559                                    {NULL,               NULL, FALSE}};
 560
 561 static HeaderEntry hentry_short[] = {
 562                                     {"Date:",           NULL, FALSE},
 563                                     {"From:",           NULL, TRUE},
 564                                     {"To:",             NULL, TRUE},
 565                                     {"Cc:",             NULL, TRUE},
 566                                     {"Newsgroups:",     NULL, TRUE},
 567                                     {"Subject:",        NULL, TRUE},
 568                                     {"Message-ID:",     NULL, FALSE},
 569                                     {"References:",     NULL, FALSE},
 570                                     {"In-Reply-To:",    NULL, FALSE},
 571                                     {"Content-Type:",   NULL, FALSE},
 572                                     {"Seen:",           NULL, FALSE},
 573                                     {"Status:",         NULL, FALSE},
 574                                     {"From ",           NULL, FALSE},
 575                                     {"SC-Marked-For-Download:", NULL, FALSE},
 576                                     {"SC-Message-Size:",NULL, FALSE},
 577                                     {NULL,              NULL, FALSE}};
 578
 579 static HeaderEntry* procheader_get_headernames(gboolean full)
 580 {
 581         return full ? hentry_full : hentry_short;
 582 }
 583
 584 MsgInfo *procheader_parse_stream(FILE *fp, MsgFlags flags, gboolean full,
 585                                  gboolean decrypted)
 586 {
 587         return parse_stream(fp, FALSE, flags, full, decrypted);
 588 }
 589
 590 static gboolean avatar_from_some_face(gpointer source, gpointer userdata)
 591 {
 592         AvatarCaptureData *acd = (AvatarCaptureData *)source;
 593
 594         if (*(acd->content) == '\0') /* won't be null, but may be empty */
 595                 return FALSE;
 596
 597         if (!strcmp(acd->header, hentry_full[H_FACE].name)) {
 598                 debug_print("avatar_from_some_face: found 'Face' header\n");
 599                 procmsg_msginfo_add_avatar(acd->msginfo, AVATAR_FACE, acd->content);
 600         }
 601 #if HAVE_LIBCOMPFACE
 602         else if (!strcmp(acd->header, hentry_full[H_X_FACE].name)) {
 603                 debug_print("avatar_from_some_face: found 'X-Face' header\n");
 604                 procmsg_msginfo_add_avatar(acd->msginfo, AVATAR_XFACE, acd->content);
 605         }
 606 #endif
 607         return FALSE;
 608 }
 609
 610 static gulong avatar_hook_id = HOOK_NONE;
 611
 612 static MsgInfo *parse_stream(void *data, gboolean isstring, MsgFlags flags,
 613                              gboolean full, gboolean decrypted)
 614 {
 615         MsgInfo *msginfo;
 616         gchar *buf = NULL;
 617         gchar *p, *tmp;
 618         gchar *hp;
 619         HeaderEntry *hentry;
 620         gint hnum;
 621         void *orig_data = data;
 622
 623         get_one_field_func get_one_field =
 624                 isstring ? (get_one_field_func)string_get_one_field
 625                          : (get_one_field_func)procheader_get_one_field;
 626
 627         hentry = procheader_get_headernames(full);
 628
 629         if (MSG_IS_QUEUED(flags) || MSG_IS_DRAFT(flags)) {
 630                 while (get_one_field(&buf, data, NULL) != -1) {
 631                         if ((!strncmp(buf, "X-Claws-End-Special-Headers: 1",
 632                                 strlen("X-Claws-End-Special-Headers:"))) ||
 633                             (!strncmp(buf, "X-Sylpheed-End-Special-Headers: 1",
 634                                 strlen("X-Sylpheed-End-Special-Headers:")))) {
 635                                 g_free(buf);
 636                                 buf = NULL;
 637                                 break;
 638                         }
 639                         /* from other mailers */
 640                         if (!strncmp(buf, "Date: ", 6)
 641                         ||  !strncmp(buf, "To: ", 4)
 642                         ||  !strncmp(buf, "From: ", 6)
 643                         ||  !strncmp(buf, "Subject: ", 9)) {
 644                                 if (isstring)
 645                                         data = orig_data;
 646                                 else
 647                                         rewind((FILE *)data);
 648                                 g_free(buf);
 649                                 buf = NULL;
 650                                 break;
 651                         }
 652                         g_free(buf);
 653                         buf = NULL;
 654                 }
 655         }
 656
 657         msginfo = procmsg_msginfo_new();
 658
 659         if (flags.tmp_flags || flags.perm_flags)
 660                 msginfo->flags = flags;
 661         else
 662                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_NEW | MSG_UNREAD);
 663
 664         msginfo->inreplyto = NULL;
 665
 666         if (avatar_hook_id == HOOK_NONE &&
 667             (prefs_common.enable_avatars && (AVATARS_ENABLE_CAPTURE || AVATARS_ENABLE_RENDER))) {
 668                 avatar_hook_id = hooks_register_hook(AVATAR_HEADER_UPDATE_HOOKLIST,
 669                                                      avatar_from_some_face, NULL);
 670         } else if (avatar_hook_id != HOOK_NONE &&
 671                    !(prefs_common.enable_avatars && AVATARS_ENABLE_CAPTURE)) {
 672                 hooks_unregister_hook(AVATAR_HEADER_UPDATE_HOOKLIST, avatar_hook_id);
 673                 avatar_hook_id = HOOK_NONE;
 674         }
 675
 676         while ((hnum = get_one_field(&buf, data, hentry)) != -1) {
 677                 hp = buf + strlen(hentry[hnum].name);
 678                 while (*hp == ' ' || *hp == '\t') hp++;
 679
 680                 switch (hnum) {
 681                 case H_DATE:
 682                         if (msginfo->date) break;
 683                         msginfo->date_t =
 684                                 procheader_date_parse(NULL, hp, 0);
 685                         if (g_utf8_validate(hp, -1, NULL)) {
 686                                 msginfo->date = g_strdup(hp);
 687                         } else {
 688                                 gchar *utf = conv_codeset_strdup(
 689                                         hp,
 690                                         conv_get_locale_charset_str_no_utf8(),
 691                                         CS_INTERNAL);
 692                                 if (utf == NULL ||
 693                                     !g_utf8_validate(utf, -1, NULL)) {
 694                                         g_free(utf);
 695                                         utf = g_malloc(strlen(buf)*2+1);
 696                                         conv_localetodisp(utf,
 697                                                 strlen(hp)*2+1, hp);
 698                                 }
 699                                 msginfo->date = utf;
 700                         }
 701                         break;
 702                 case H_FROM:
 703                         if (msginfo->from) break;
 704                         msginfo->from = conv_unmime_header(hp, NULL, TRUE);
 705                         msginfo->fromname = procheader_get_fromname(msginfo->from);
 706                         remove_return(msginfo->from);
 707                         remove_return(msginfo->fromname);
 708                         break;
 709                 case H_TO:
 710                         tmp = conv_unmime_header(hp, NULL, TRUE);
 711                         remove_return(tmp);
 712                         if (msginfo->to) {
 713                                 p = msginfo->to;
 714                                 msginfo->to =
 715                                         g_strconcat(p, ", ", tmp, NULL);
 716                                 g_free(p);
 717                         } else
 718                                 msginfo->to = g_strdup(tmp);
 719                         g_free(tmp);
 720                         break;
 721                 case H_CC:
 722                         tmp = conv_unmime_header(hp, NULL, TRUE);
 723                         remove_return(tmp);
 724                         if (msginfo->cc) {
 725                                 p = msginfo->cc;
 726                                 msginfo->cc =
 727                                         g_strconcat(p, ", ", tmp, NULL);
 728                                 g_free(p);
 729                         } else
 730                                 msginfo->cc = g_strdup(tmp);
 731                         g_free(tmp);
 732                         break;
 733                 case H_NEWSGROUPS:
 734                         if (msginfo->newsgroups) {
 735                                 p = msginfo->newsgroups;
 736                                 msginfo->newsgroups =
 737                                         g_strconcat(p, ",", hp, NULL);
 738                                 g_free(p);
 739                         } else
 740                                 msginfo->newsgroups = g_strdup(hp);
 741                         break;
 742                 case H_SUBJECT:
 743                         if (msginfo->subject) break;
 744                         msginfo->subject = conv_unmime_header(hp, NULL, FALSE);
 745                         unfold_line(msginfo->subject);
 746                        break;
 747                 case H_MSG_ID:
 748                         if (msginfo->msgid) break;
 749
 750                         extract_parenthesis(hp, '<', '>');
 751                         remove_space(hp);
 752                         msginfo->msgid = g_strdup(hp);
 753                         break;
 754                 case H_REFERENCES:
 755                         msginfo->references =
 756                                 references_list_prepend(msginfo->references,
 757                                                         hp);
 758                         break;
 759                 case H_IN_REPLY_TO:
 760                         if (msginfo->inreplyto) break;
 761
 762                         eliminate_parenthesis(hp, '(', ')');
 763                         if ((p = strrchr(hp, '<')) != NULL &&
 764                             strchr(p + 1, '>') != NULL) {
 765                                 extract_parenthesis(p, '<', '>');
 766                                 remove_space(p);
 767                                 if (*p != '\0')
 768                                         msginfo->inreplyto = g_strdup(p);
 769                         }
 770                         break;
 771                 case H_CONTENT_TYPE:
 772                         if (!g_ascii_strncasecmp(hp, "multipart/", 10))
 773                                 MSG_SET_TMP_FLAGS(msginfo->flags, MSG_MULTIPART);
 774                         break;
 775                 case H_DISPOSITION_NOTIFICATION_TO:
 776                         if (!msginfo->extradata)
 777                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 778                         if (msginfo->extradata->dispositionnotificationto) break;
 779                         msginfo->extradata->dispositionnotificationto = g_strdup(hp);
 780                         break;
 781                 case H_RETURN_RECEIPT_TO:
 782                         if (!msginfo->extradata)
 783                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 784                         if (msginfo->extradata->returnreceiptto) break;
 785                         msginfo->extradata->returnreceiptto = g_strdup(hp);
 786                         break;
 787 /* partial download infos */
 788                 case H_SC_PARTIALLY_RETRIEVED:
 789                         if (!msginfo->extradata)
 790                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 791                         if (msginfo->extradata->partial_recv) break;
 792                         msginfo->extradata->partial_recv = g_strdup(hp);
 793                         break;
 794                 case H_SC_ACCOUNT_SERVER:
 795                         if (!msginfo->extradata)
 796                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 797                         if (msginfo->extradata->account_server) break;
 798                         msginfo->extradata->account_server = g_strdup(hp);
 799                         break;
 800                 case H_SC_ACCOUNT_LOGIN:
 801                         if (!msginfo->extradata)
 802                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 803                         if (msginfo->extradata->account_login) break;
 804                         msginfo->extradata->account_login = g_strdup(hp);
 805                         break;
 806                 case H_SC_MESSAGE_SIZE:
 807                         if (msginfo->total_size) break;
 808                         msginfo->total_size = atoi(hp);
 809                         break;
 810                 case H_SC_PLANNED_DOWNLOAD:
 811                         msginfo->planned_download = atoi(hp);
 812                         break;
 813 /* end partial download infos */
 814                 case H_FROM_SPACE:
 815                         if (msginfo->fromspace) break;
 816                         msginfo->fromspace = g_strdup(hp);
 817                         remove_return(msginfo->fromspace);
 818                         break;
 819 /* list infos */
 820                 case H_LIST_POST:
 821                         if (!msginfo->extradata)
 822                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 823                         if (msginfo->extradata->list_post) break;
 824                         msginfo->extradata->list_post = g_strdup(hp);
 825                         break;
 826                 case H_LIST_SUBSCRIBE:
 827                         if (!msginfo->extradata)
 828                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 829                         if (msginfo->extradata->list_subscribe) break;
 830                         msginfo->extradata->list_subscribe = g_strdup(hp);
 831                         break;
 832                 case H_LIST_UNSUBSCRIBE:
 833                         if (!msginfo->extradata)
 834                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 835                         if (msginfo->extradata->list_unsubscribe) break;
 836                         msginfo->extradata->list_unsubscribe = g_strdup(hp);
 837                         break;
 838                 case H_LIST_HELP:
 839                         if (!msginfo->extradata)
 840                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 841                         if (msginfo->extradata->list_help) break;
 842                         msginfo->extradata->list_help = g_strdup(hp);
 843                         break;
 844                 case H_LIST_ARCHIVE:
 845                         if (!msginfo->extradata)
 846                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 847                         if (msginfo->extradata->list_archive) break;
 848                         msginfo->extradata->list_archive = g_strdup(hp);
 849                         break;
 850                 case H_LIST_OWNER:
 851                         if (!msginfo->extradata)
 852                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 853                         if (msginfo->extradata->list_owner) break;
 854                         msginfo->extradata->list_owner = g_strdup(hp);
 855                         break;
 856                 case H_RESENT_FROM:
 857                         if (!msginfo->extradata)
 858                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 859                         if (msginfo->extradata->resent_from) break;
 860                         msginfo->extradata->resent_from = g_strdup(hp);
 861                         break;
 862 /* end list infos */
 863                 default:
 864                         break;
 865                 }
 866                 /* to avoid performance penalty hooklist is invoked only for
 867                    headers known to be able to generate avatars */
 868                 if (hnum == H_FROM || hnum == H_X_FACE || hnum == H_FACE) {
 869                         AvatarCaptureData *acd = g_new0(AvatarCaptureData, 1);
 870                         /* no extra memory is wasted, hooks are expected to
 871                            take care of copying members when needed */
 872                         acd->msginfo = msginfo;
 873                         acd->header  = hentry_full[hnum].name;
 874                         acd->content = hp;
 875                         hooks_invoke(AVATAR_HEADER_UPDATE_HOOKLIST, (gpointer)acd);
 876                         g_free(acd);
 877                 }
 878                 g_free(buf);
 879                 buf = NULL;
 880         }
 881
 882         if (!msginfo->inreplyto && msginfo->references)
 883                 msginfo->inreplyto =
 884                         g_strdup((gchar *)msginfo->references->data);
 885
 886         return msginfo;
 887 }
 888
 889 gchar *procheader_get_fromname(const gchar *str)
 890 {
 891         gchar *tmp, *name;
 892
 893         Xstrdup_a(tmp, str, return NULL);
 894
 895         if (*tmp == '\"') {
 896                 extract_quote(tmp, '\"');
 897                 g_strstrip(tmp);
 898         } else if (strchr(tmp, '<')) {
 899                 eliminate_parenthesis(tmp, '<', '>');
 900                 g_strstrip(tmp);
 901                 if (*tmp == '\0') {
 902                         strcpy(tmp, str);
 903                         extract_parenthesis(tmp, '<', '>');
 904                         g_strstrip(tmp);
 905                 }
 906         } else if (strchr(tmp, '(')) {
 907                 extract_parenthesis(tmp, '(', ')');
 908                 g_strstrip(tmp);
 909         }
 910
 911         if (*tmp == '\0')
 912                 name = g_strdup(str);
 913         else
 914                 name = g_strdup(tmp);
 915
 916         return name;
 917 }
 918
 919 static gint procheader_scan_date_string(const gchar *str,
 920                                         gchar *weekday, gint *day,
 921                                         gchar *month, gint *year,
 922                                         gint *hh, gint *mm, gint *ss,
 923                                         gchar *zone)
 924 {
 925         gint result;
 926         gint month_n;
 927         gint secfract;
 928         gint zone1 = 0, zone2 = 0;
 929         gchar offset_sign, zonestr[7];
 930         gchar sep1;
 931
 932         if (str == NULL)
 933                 return -1;
 934
 935         result = sscanf(str, "%10s %d %9s %d %2d:%2d:%2d %6s",
 936                         weekday, day, month, year, hh, mm, ss, zone);
 937         if (result == 8) return 0;
 938
 939         /* RFC2822 */
 940         result = sscanf(str, "%3s,%d %9s %d %2d:%2d:%2d %6s",
 941                         weekday, day, month, year, hh, mm, ss, zone);
 942         if (result == 8) return 0;
 943
 944         result = sscanf(str, "%3s %3s %d %2d:%2d:%2d %d %6s",
 945                         weekday, month, day, hh, mm, ss, year, zone);
 946         if (result == 8) return 0;
 947
 948         result = sscanf(str, "%d %9s %d %2d:%2d:%2d %6s",
 949                         day, month, year, hh, mm, ss, zone);
 950         if (result == 7) return 0;
 951
 952         *zone = '\0';
 953         result = sscanf(str, "%10s %d %9s %d %2d:%2d:%2d",
 954                         weekday, day, month, year, hh, mm, ss);
 955         if (result == 7) return 0;
 956
 957         result = sscanf(str, "%3s %3s %d %2d:%2d:%2d %d",
 958                         weekday, month, day, hh, mm, ss, year);
 959         if (result == 7) return 0;
 960
 961         result = sscanf(str, "%d %9s %d %2d:%2d:%2d",
 962                         day, month, year, hh, mm, ss);
 963         if (result == 6) return 0;
 964
 965         *ss = 0;
 966         result = sscanf(str, "%10s %d %9s %d %2d:%2d %6s",
 967                         weekday, day, month, year, hh, mm, zone);
 968         if (result == 7) return 0;
 969
 970         result = sscanf(str, "%d %9s %d %2d:%2d %5s",
 971                         day, month, year, hh, mm, zone);
 972         if (result == 6) return 0;
 973
 974         *zone = '\0';
 975         result = sscanf(str, "%10s %d %9s %d %2d:%2d",
 976                         weekday, day, month, year, hh, mm);
 977         if (result == 6) return 0;
 978
 979         result = sscanf(str, "%d %9s %d %2d:%2d",
 980                         day, month, year, hh, mm);
 981         if (result == 5) return 0;
 982
 983         *weekday = '\0';
 984
 985         /* RFC3339 subset, with fraction of second */
 986         result = sscanf(str, "%4d-%2d-%2d%c%2d:%2d:%2d.%d%6s",
 987                         year, &month_n, day, &sep1, hh, mm, ss, &secfract, zonestr);
 988         if (result == 9
 989                         && (sep1 == 'T' || sep1 == 't' || sep1 == ' ')) {
 990                 if (month_n >= 1 && month_n <= 12) {
 991                         strncpy2(month, monthstr+((month_n-1)*3), 4);
 992                         if (zonestr[0] == 'z' || zonestr[0] == 'Z') {
 993                                 strcat(zone, "+00:00");
 994                         } else if (sscanf(zonestr, "%c%2d:%2d",
 995                                                 &offset_sign, &zone1, &zone2) == 3) {
 996                                 strcat(zone, zonestr);
 997                         }
 998                         return 0;
 999                 }
1000         }
1001
1002         /* RFC3339 subset, no fraction of second */
1003         result = sscanf(str, "%4d-%2d-%2d%c%2d:%2d:%2d%6s",
1004                         year, &month_n, day, &sep1, hh, mm, ss, zonestr);
1005         if (result == 8
1006                         && (sep1 == 'T' || sep1 == 't' || sep1 == ' ')) {
1007                 if (month_n >= 1 && month_n <= 12) {
1008                         strncpy2(month, monthstr+((month_n-1)*3), 4);
1009                         if (zonestr[0] == 'z' || zonestr[0] == 'Z') {
1010                                 strcat(zone, "+00:00");
1011                         } else if (sscanf(zonestr, "%c%2d:%2d",
1012                                                 &offset_sign, &zone1, &zone2) == 3) {
1013                                 strcat(zone, zonestr);
1014                         }
1015                         return 0;
1016                 }
1017         }
1018
1019         *zone = '\0';
1020
1021         /* RFC3339 subset, no fraction of second, and no timezone offset */
1022         /* This particular "subset" is invalid, RFC requires the offset */
1023         result = sscanf(str, "%4d-%2d-%2d %2d:%2d:%2d",
1024                         year, &month_n, day, hh, mm, ss);
1025         if (result == 6) {
1026                 if (1 <= month_n && month_n <= 12) {
1027                         strncpy2(month, monthstr+((month_n-1)*3), 4);
1028                         return 0;
1029                 }
1030         }
1031
1032         /* ISO8601 format with just date (YYYY-MM-DD) */
1033         result = sscanf(str, "%4d-%2d-%2d",
1034                         year, &month_n, day);
1035         if (result == 3) {
1036                 *hh = *mm = *ss = 0;
1037                 if (1 <= month_n && month_n <= 12) {
1038                         strncpy2(month, monthstr+((month_n-1)*3), 4);
1039                         return 0;
1040                 }
1041         }
1042
1043         return -1;
1044 }
1045
1046 /*
1047  * Hiro, most UNIXen support this function:
1048  * http://www.mcsr.olemiss.edu/cgi-bin/man-cgi?getdate
1049  */
1050 gboolean procheader_date_parse_to_tm(const gchar *src, struct tm *t, char *zone)
1051 {
1052         gchar weekday[11];
1053         gint day;
1054         gchar month[10];
1055         gint year;
1056         gint hh, mm, ss;
1057         GDateMonth dmonth;
1058         gchar *p;
1059
1060         if (!t)
1061                 return FALSE;
1062
1063         memset(t, 0, sizeof *t);
1064
1065         if (procheader_scan_date_string(src, weekday, &day, month, &year,
1066                                         &hh, &mm, &ss, zone) < 0) {
1067                 g_warning("Invalid date: %s", src);
1068                 return FALSE;
1069         }
1070
1071         /* Y2K compliant :) */
1072         if (year < 100) {
1073                 if (year < 70)
1074                         year += 2000;
1075                 else
1076                         year += 1900;
1077         }
1078
1079         month[3] = '\0';
1080         if ((p = strstr(monthstr, month)) != NULL)
1081                 dmonth = (gint)(p - monthstr) / 3 + 1;
1082         else {
1083                 g_warning("Invalid month: %s", month);
1084                 dmonth = G_DATE_BAD_MONTH;
1085         }
1086
1087         t->tm_sec = ss;
1088         t->tm_min = mm;
1089         t->tm_hour = hh;
1090         t->tm_mday = day;
1091         t->tm_mon = dmonth - 1;
1092         t->tm_year = year - 1900;
1093         t->tm_wday = 0;
1094         t->tm_yday = 0;
1095         t->tm_isdst = -1;
1096
1097         mktime(t);
1098
1099         return TRUE;
1100 }
1101
1102 time_t procheader_date_parse(gchar *dest, const gchar *src, gint len)
1103 {
1104         gchar weekday[11];
1105         gint day;
1106         gchar month[10];
1107         gint year;
1108         gint hh, mm, ss;
1109         gchar zone[7];
1110         GDateMonth dmonth = G_DATE_BAD_MONTH;
1111         gchar *p;
1112         time_t timer;
1113
1114         if (procheader_scan_date_string(src, weekday, &day, month, &year,
1115                                         &hh, &mm, &ss, zone) < 0) {
1116                 if (dest && len > 0)
1117                         strncpy2(dest, src, len);
1118                 return 0;
1119         }
1120
1121         month[3] = '\0';
1122         for (p = monthstr; *p != '\0'; p += 3) {
1123                 if (!g_ascii_strncasecmp(p, month, 3)) {
1124                         dmonth = (gint)(p - monthstr) / 3 + 1;
1125                         break;
1126                 }
1127         }
1128
1129 #ifdef G_OS_WIN32
1130         GTimeZone *tz;
1131         GDateTime *dt, *dt2;
1132
1133         tz = g_time_zone_new(zone); // can't return NULL no need to check for it
1134         dt = g_date_time_new(tz, 1, 1, 1, 0, 0, 0);
1135         g_time_zone_unref(tz);
1136         dt2 = g_date_time_add_full(dt, year-1, dmonth-1, day-1, hh, mm, ss);
1137         g_date_time_unref(dt);
1138
1139         timer = g_date_time_to_unix(dt2);
1140         g_date_time_unref(dt2);
1141
1142 #else
1143         struct tm t;
1144         time_t tz_offset;
1145
1146         /* Y2K compliant :) */
1147         if (year < 1000) {
1148                 if (year < 50)
1149                         year += 2000;
1150                 else
1151                         year += 1900;
1152         }
1153
1154         t.tm_sec = ss;
1155         t.tm_min = mm;
1156         t.tm_hour = hh;
1157         t.tm_mday = day;
1158         t.tm_mon = dmonth - 1;
1159         t.tm_year = year - 1900;
1160         t.tm_wday = 0;
1161         t.tm_yday = 0;
1162         t.tm_isdst = -1;
1163
1164         timer = mktime(&t);
1165         tz_offset = remote_tzoffset_sec(zone);
1166         if (tz_offset != -1)
1167                 timer += tzoffset_sec(&timer) - tz_offset;
1168
1169         if (dest)
1170                 procheader_date_get_localtime(dest, len, timer);
1171 #endif
1172
1173         return timer;
1174 }
1175
1176 void procheader_date_get_localtime(gchar *dest, gint len, const time_t timer)
1177 {
1178         struct tm *lt;
1179         gchar *default_format = "%y/%m/%d(%a) %H:%M";
1180         gchar *str;
1181         const gchar *src_codeset, *dest_codeset;
1182         struct tm buf;
1183
1184         if (timer > 0)
1185                 lt = localtime_r(&timer, &buf);
1186         else {
1187                 time_t dummy = 1;
1188                 lt = localtime_r(&dummy, &buf);
1189         }
1190
1191         if (prefs_common.date_format)
1192                 fast_strftime(dest, len, prefs_common.date_format, lt);
1193         else
1194                 fast_strftime(dest, len, default_format, lt);
1195
1196         if (!g_utf8_validate(dest, -1, NULL)) {
1197                 src_codeset = conv_get_locale_charset_str_no_utf8();
1198                 dest_codeset = CS_UTF_8;
1199                 str = conv_codeset_strdup(dest, src_codeset, dest_codeset);
1200                 if (str) {
1201                         strncpy2(dest, str, len);
1202                         g_free(str);
1203                 }
1204         }
1205 }
1206
1207 /* Added by Mel Hadasht on 27 Aug 2001 */
1208 /* Get a header from msginfo */
1209 gint procheader_get_header_from_msginfo(MsgInfo *msginfo, gchar **buf, gchar *header)
1210 {
1211         gchar *file;
1212         FILE *fp;
1213         HeaderEntry hentry[]={ { NULL, NULL, TRUE  },
1214                                                    { NULL, NULL, FALSE } };
1215         gint val;
1216
1217         cm_return_val_if_fail(msginfo != NULL, -1);
1218         cm_return_val_if_fail(buf != NULL, -1);
1219         cm_return_val_if_fail(header != NULL, -1);
1220
1221         hentry[0].name = header;
1222
1223         file = procmsg_get_message_file_path(msginfo);
1224         if ((fp = claws_fopen(file, "rb")) == NULL) {
1225                 FILE_OP_ERROR(file, "claws_fopen");
1226                 g_free(file);
1227                 g_free(*buf);
1228                 *buf = NULL;
1229                 return -1;
1230         }
1231         val = procheader_get_one_field(buf, fp, hentry);
1232
1233         if (claws_fclose(fp) == EOF) {
1234                 FILE_OP_ERROR(file, "claws_fclose");
1235                 claws_unlink(file);
1236                 g_free(file);
1237                 g_free(*buf);
1238                 *buf = NULL;
1239                 return -1;
1240         }
1241
1242         g_free(file);
1243         if (val == -1) {
1244                 /* *buf is already NULL in that case, see procheader_get_one_field() */
1245                 return -1;
1246         }
1247
1248         return 0;
1249 }
1250
1251 HeaderEntry *procheader_entries_from_str(const gchar *str)
1252 {
1253         HeaderEntry *entries = NULL, *he;
1254         int numh = 0, i = 0;
1255         gchar **names = NULL;
1256         const gchar *s = str;
1257
1258         if (s == NULL) {
1259                 return NULL;
1260         }
1261         while (*s != '\0') {
1262                 if (*s == ' ') ++numh;
1263                 ++s;
1264         }
1265         if (numh == 0) {
1266                 return NULL;
1267         }
1268         entries = g_new0(HeaderEntry, numh + 1); /* room for last NULL */
1269         s = str;
1270         ++s; /* skip first space */
1271         names = g_strsplit(s, " ", numh);
1272         he = entries;
1273         while (names[i]) {
1274                 he->name = g_strdup_printf("%s:", names[i]);
1275                 he->body = NULL;
1276                 he->unfold = FALSE;
1277                 ++i, ++he;
1278         }
1279         he->name = NULL;
1280         g_strfreev(names);
1281         return entries;
1282 }
1283
1284 void procheader_entries_free (HeaderEntry *entries)
1285 {
1286         if (entries != NULL) {
1287                 HeaderEntry *he = entries;
1288                 while (he->name != NULL) {
1289                         g_free(he->name);
1290                         if (he->body != NULL)
1291                                 g_free(he->body);
1292                         ++he;
1293                 }
1294                 g_free(entries);
1295         }
1296 }
1297
1298 gboolean procheader_header_is_internal(const gchar *hdr_name)
1299 {
1300         const gchar *internal_hdrs[] = {
1301                 "AF:", "NF:", "PS:", "SRH:", "SFN:", "DSR:", "MID:", "CFG:",
1302                 "PT:", "S:", "RQ:", "SSV:", "NSV:", "SSH:", "R:", "MAID:",
1303                 "SCF:", "RMID:", "FMID:", "NAID:",
1304                 "X-Claws-Account-Id:",
1305                 "X-Claws-Sign:",
1306                 "X-Claws-Encrypt:",
1307                 "X-Claws-Privacy-System:",
1308                 "X-Claws-Auto-Wrapping:",
1309                 "X-Claws-Auto-Indent:",
1310                 "X-Claws-End-Special-Headers:",
1311                 "X-Sylpheed-Account-Id:",
1312                 "X-Sylpheed-Sign:",
1313                 "X-Sylpheed-Encrypt:",
1314                 "X-Sylpheed-Privacy-System:",
1315                 "X-Sylpheed-End-Special-Headers:",
1316                  NULL
1317         };
1318         int i;
1319
1320         for (i = 0; internal_hdrs[i]; i++) {
1321                 if (!strcmp(hdr_name, internal_hdrs[i]))
1322                         return TRUE;
1323         }
1324         return FALSE;
1325 }