src/core/sipmsg.c

   1 /**
   2  * @file sipmsg.c
   3  *
   4  * pidgin-sipe
   5  *
   6  * Copyright (C) 2010 SIPE Project <http://sipe.sourceforge.net/>
   7  * Copyright (C) 2008 Novell, Inc.
   8  * Copyright (C) 2005 Thomas Butter <butter@uni-mannheim.de>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  */
  24
  25 #include <stdlib.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <time.h>
  29
  30 #include <glib.h>
  31
  32 #include "sipmsg.h"
  33 #include "sipe-backend.h"
  34 #include "sipe-mime.h"
  35 #include "sipe-utils.h"
  36
  37 struct sipmsg *sipmsg_parse_msg(const gchar *msg) {
  38         const char *tmp = strstr(msg, "\r\n\r\n");
  39         char *line;
  40         struct sipmsg *smsg;
  41
  42         if(!tmp) return NULL;
  43
  44         line = g_strndup(msg, tmp - msg);
  45
  46         smsg = sipmsg_parse_header(line);
  47         smsg->body = g_strdup(tmp + 4);
  48
  49         g_free(line);
  50         return smsg;
  51 }
  52
  53 struct sipmsg *sipmsg_parse_header(const gchar *header) {
  54         struct sipmsg *msg = g_new0(struct sipmsg,1);
  55         gchar **lines = g_strsplit(header,"\r\n",0);
  56         gchar **parts;
  57         const gchar *contentlength;
  58         if(!lines[0]) {
  59                 g_strfreev(lines);
  60                 g_free(msg);
  61                 return NULL;
  62         }
  63         parts = g_strsplit(lines[0], " ", 3);
  64         if(!parts[0] || !parts[1] || !parts[2]) {
  65                 g_strfreev(parts);
  66                 g_strfreev(lines);
  67                 g_free(msg);
  68                 return NULL;
  69         }
  70         if(strstr(parts[0],"SIP") || strstr(parts[0],"HTTP")) { /* numeric response */
  71                 msg->method = g_strdup(parts[2]);
  72                 msg->response = strtol(parts[1],NULL,10);
  73         } else { /* request */
  74                 msg->method = g_strdup(parts[0]);
  75                 msg->target = g_strdup(parts[1]);
  76                 msg->response = 0;
  77         }
  78         g_strfreev(parts);
  79         if (sipe_utils_parse_lines(&msg->headers,lines + 1) == FALSE) {
  80                 g_strfreev(lines);
  81                 sipmsg_free(msg);
  82                 return NULL;
  83         }
  84         g_strfreev(lines);
  85         contentlength = sipmsg_find_header(msg, "Content-Length");
  86         if (contentlength) {
  87                 msg->bodylen = strtol(contentlength,NULL,10);
  88         } else {
  89                 SIPE_DEBUG_FATAL_NOFORMAT("sipmsg_parse_header(): Content-Length header not found");
  90         }
  91         if(msg->response) {
  92                 const gchar *tmp;
  93                 g_free(msg->method);
  94                 tmp = sipmsg_find_header(msg, "CSeq");
  95                 if(!tmp) {
  96                         /* SHOULD NOT HAPPEN */
  97                         msg->method = 0;
  98                 } else {
  99                         parts = g_strsplit(tmp, " ", 2);
 100                         msg->method = g_strdup(parts[1]);
 101                         g_strfreev(parts);
 102                 }
 103         }
 104         return msg;
 105 }
 106
 107 char *sipmsg_to_string(const struct sipmsg *msg) {
 108         GSList *cur;
 109         GString *outstr = g_string_new("");
 110         struct sipnameval *elem;
 111
 112         if(msg->response)
 113                 g_string_append_printf(outstr, "SIP/2.0 %d Unknown\r\n",
 114                         msg->response);
 115         else
 116                 g_string_append_printf(outstr, "%s %s SIP/2.0\r\n",
 117                         msg->method, msg->target);
 118
 119         cur = msg->headers;
 120         while(cur) {
 121                 elem = cur->data;
 122                 /*Todo: remove the LFCR in a good way*/
 123                 /*if(sipe_strequal(elem->name,"Proxy-Authorization"))
 124                   g_string_append_printf(outstr, "%s: %s", elem->name,
 125                         elem->value);
 126                 else     */
 127                    g_string_append_printf(outstr, "%s: %s\r\n", elem->name,
 128                         elem->value);
 129                 cur = g_slist_next(cur);
 130         }
 131
 132         g_string_append_printf(outstr, "\r\n%s", msg->bodylen ? msg->body : "");
 133
 134         return g_string_free(outstr, FALSE);
 135 }
 136
 137 /**
 138  * Adds header to current message headers at specified position
 139  */
 140 void sipmsg_add_header_now_pos(struct sipmsg *msg, const gchar *name, const gchar *value, int pos) {
 141         struct sipnameval *element = g_new0(struct sipnameval,1);
 142
 143         /* SANITY CHECK: the calling code must be fixed if this happens! */
 144         if (!value) {
 145                 SIPE_DEBUG_ERROR("sipmsg_add_header_now_pos: NULL value for %s (%d)",
 146                                  name, pos);
 147                 value = "";
 148         }
 149
 150         element->name = g_strdup(name);
 151         element->value = g_strdup(value);
 152         msg->headers = g_slist_insert(msg->headers, element,pos);
 153 }
 154
 155 /**
 156  * Adds header to current message headers
 157  */
 158 void sipmsg_add_header_now(struct sipmsg *msg, const gchar *name, const gchar *value) {
 159         struct sipnameval *element = g_new0(struct sipnameval,1);
 160
 161         /* SANITY CHECK: the calling code must be fixed if this happens! */
 162         if (!value) {
 163                 SIPE_DEBUG_ERROR("sipmsg_add_header_now: NULL value for %s",
 164                                  name);
 165                 value = "";
 166         }
 167
 168         element->name = g_strdup(name);
 169         element->value = g_strdup(value);
 170         msg->headers = g_slist_append(msg->headers, element);
 171 }
 172
 173 /**
 174  * Adds header to separate storage for future merge
 175  */
 176 void sipmsg_add_header(struct sipmsg *msg, const gchar *name, const gchar *value) {
 177         struct sipnameval *element = g_new0(struct sipnameval,1);
 178
 179         /* SANITY CHECK: the calling code must be fixed if this happens! */
 180         if (!value) {
 181                 SIPE_DEBUG_ERROR("sipmsg_add_header: NULL value for %s", name);
 182                 value = "";
 183         }
 184
 185         element->name = g_strdup(name);
 186         element->value = g_strdup(value);
 187         msg->new_headers = g_slist_append(msg->new_headers, element);
 188 }
 189
 190 /**
 191  * Removes header if it's not in keepers array
 192  */
 193 void sipmsg_strip_headers(struct sipmsg *msg, const gchar *keepers[]) {
 194         GSList *entry;
 195         struct sipnameval *elem;
 196
 197         entry = msg->headers;
 198         while(entry) {
 199                 int i = 0;
 200                 gboolean keeper = FALSE;
 201
 202                 elem = entry->data;
 203                 while (keepers[i]) {
 204                         if (!g_strcasecmp(elem->name, keepers[i])) {
 205                                 keeper = TRUE;
 206                                 break;
 207                         }
 208                         i++;
 209                 }
 210
 211                 if (!keeper) {
 212                         GSList *to_delete = entry;
 213                         SIPE_DEBUG_INFO("sipmsg_strip_headers: removing %s", elem->name);
 214                         entry = g_slist_next(entry);
 215                         msg->headers = g_slist_delete_link(msg->headers, to_delete);
 216                         g_free(elem->name);
 217                         g_free(elem->value);
 218                         g_free(elem);
 219                 } else {
 220                         entry = g_slist_next(entry);
 221                 }
 222         }
 223 }
 224
 225 /**
 226  * Merges newly added headers to message
 227  */
 228 void sipmsg_merge_new_headers(struct sipmsg *msg) {
 229         while(msg->new_headers) {
 230                 msg->headers = g_slist_append(msg->headers, msg->new_headers->data);
 231                 msg->new_headers = g_slist_remove(msg->new_headers, msg->new_headers->data);
 232         }
 233 }
 234
 235 void sipmsg_free(struct sipmsg *msg) {
 236         sipe_utils_nameval_free(msg->headers);
 237         sipe_utils_nameval_free(msg->new_headers);
 238         g_free(msg->signature);
 239         g_free(msg->rand);
 240         g_free(msg->num);
 241         g_free(msg->method);
 242         g_free(msg->target);
 243         g_free(msg->body);
 244         g_free(msg);
 245 }
 246
 247 void sipmsg_remove_header_now(struct sipmsg *msg, const gchar *name) {
 248         struct sipnameval *elem;
 249         GSList *tmp = msg->headers;
 250         while(tmp) {
 251                 elem = tmp->data;
 252                 // OCS2005 can send the same header in either all caps or mixed case
 253                 if (sipe_strcase_equal(elem->name, name)) {
 254                         msg->headers = g_slist_remove(msg->headers, elem);
 255                         g_free(elem->name);
 256                         g_free(elem->value);
 257                         g_free(elem);
 258                         return;
 259                 }
 260                 tmp = g_slist_next(tmp);
 261         }
 262         return;
 263 }
 264
 265 const gchar *sipmsg_find_header(const struct sipmsg *msg, const gchar *name) {
 266         return sipe_utils_nameval_find_instance (msg->headers, name, 0);
 267 }
 268
 269 const gchar *sipmsg_find_header_instance(const struct sipmsg *msg, const gchar *name, int which) {
 270         return sipe_utils_nameval_find_instance(msg->headers, name, which);
 271 }
 272
 273 gchar *sipmsg_find_part_of_header(const char *hdr, const char * before, const char * after, const char * def) {
 274         const char *tmp;
 275         const char *tmp2;
 276         gchar *res2;
 277         if (!hdr) {
 278                 return NULL;
 279         }
 280
 281         //printf("partof %s w/ %s before and %s after\n", hdr, before, after);
 282
 283         tmp = before == NULL ? hdr : strstr(hdr, before);
 284         if (!tmp) {
 285                 //printf ("not found, returning null\n");
 286                 return (gchar *)def;
 287         }
 288
 289         if (before != NULL) {
 290                 tmp += strlen(before);
 291                 //printf ("tmp now %s\n", tmp);
 292         }
 293
 294         if (after != NULL && (tmp2 = strstr(tmp, after))) {
 295                 gchar * res = g_strndup(tmp, tmp2 - tmp);
 296                 //printf("returning %s\n", res);
 297                 return res;
 298         }
 299         res2 = g_strdup(tmp);
 300         //printf("returning %s\n", res2);
 301         return res2;
 302 }
 303
 304 /**
 305  * Parse EndPoints header from INVITE request
 306  * Returns a list of end points: contact URI plus optional epid.
 307  * You must free the values and the list.
 308  *
 309  * Example headers:
 310  * EndPoints: "alice alisson" <sip:alice@atlanta.local>, <sip:bob@atlanta.local>;epid=ebca82d94d, <sip:carol@atlanta.local>
 311  * EndPoints: "alice, alisson" <sip:alice@atlanta.local>, <sip:bob@atlanta.local>
 312  * EndPoints: "alice alisson" <sip:alice@atlanta.local>, "Super, Man" <sip:super@atlanta.local>
 313  *
 314  * @param header (in) EndPoints header contents
 315  *
 316  * @return GSList with struct sipendpoint as elements
 317  */
 318 GSList *sipmsg_parse_endpoints_header(const gchar *header)
 319 {
 320         GSList *list = NULL;
 321         gchar **parts = g_strsplit(header, ",", 0);
 322         gchar *part;
 323         int i;
 324
 325         for (i = 0; (part = parts[i]) != NULL; i++) {
 326                 /* Does the part contain a URI? */
 327                 gchar *contact = sipmsg_find_part_of_header(part, "<", ">", NULL);
 328                 if (contact) {
 329                         struct sipendpoint *end_point = g_new(struct sipendpoint, 1);
 330                         end_point->contact = contact;
 331                         end_point->epid = sipmsg_find_part_of_header(part, "epid=", NULL, NULL);
 332                         list = g_slist_append(list, end_point);
 333                 }
 334         }
 335         g_strfreev(parts);
 336
 337         return(list);
 338 }
 339
 340 /*
 341  *  sipmsg_find_auth_header will return the particular WWW-Authenticate
 342  *  header specified by *name.
 343  *
 344  *  Use this function when you want to look for a specific authentication
 345  *  method such as NTLM or Kerberos
 346  */
 347
 348 gchar *sipmsg_find_auth_header(struct sipmsg *msg, const gchar *name) {
 349         GSList *tmp;
 350         struct sipnameval *elem;
 351         int name_len = strlen(name);
 352         tmp = msg->headers;
 353         while(tmp) {
 354                 elem = tmp->data;
 355                 /* SIPE_DEBUG_INFO("Current header: %s", elem->value); */
 356                 if (elem && elem->name &&
 357                     (sipe_strcase_equal(elem->name,"WWW-Authenticate") ||
 358                      sipe_strcase_equal(elem->name,"Authentication-Info")) ) {
 359                         if (!g_strncasecmp((gchar *)elem->value, name, name_len)) {
 360                                 /* SIPE_DEBUG_INFO("elem->value: %s", elem->value); */
 361                                 return elem->value;
 362                         }
 363                 }
 364                 /* SIPE_DEBUG_INFO_NOFORMAT("moving to next header"); */
 365                 tmp = g_slist_next(tmp);
 366         }
 367         SIPE_DEBUG_INFO("auth header '%s' not found.", name);
 368         return NULL;
 369 }
 370
 371 gchar *sipmsg_get_x_mms_im_format(gchar *msgr) {
 372         gchar *msgr2;
 373         gsize msgr_dec64_len;
 374         guchar *msgr_dec64;
 375         gchar *msgr_utf8;
 376         gchar **lines;
 377         gchar **parts;
 378         gchar *x_mms_im_format;
 379         gchar *tmp;
 380
 381         if (!msgr) return NULL;
 382         msgr2 = g_strdup(msgr);
 383         while (strlen(msgr2) % 4 != 0) {
 384                 gchar *tmp_msgr2 = msgr2;
 385                 msgr2 = g_strdup_printf("%s=", msgr2);
 386                 g_free(tmp_msgr2);
 387         }
 388         msgr_dec64 = g_base64_decode(msgr2, &msgr_dec64_len);
 389         msgr_utf8 = g_convert((gchar *) msgr_dec64, msgr_dec64_len, "UTF-8", "UTF-16LE", NULL, NULL, NULL);
 390         g_free(msgr_dec64);
 391         g_free(msgr2);
 392         lines = g_strsplit(msgr_utf8,"\r\n\r\n",0);
 393         g_free(msgr_utf8);
 394         //@TODO: make extraction like parsing of message headers.
 395         parts = g_strsplit(lines[0],"X-MMS-IM-Format:",0);
 396         x_mms_im_format = g_strdup(parts[1]);
 397         g_strfreev(parts);
 398         g_strfreev(lines);
 399         tmp = x_mms_im_format;
 400         if (x_mms_im_format) {
 401                 while(*x_mms_im_format==' ' || *x_mms_im_format=='\t') x_mms_im_format++;
 402         }
 403         x_mms_im_format = g_strdup(x_mms_im_format);
 404         g_free(tmp);
 405         return x_mms_im_format;
 406 }
 407
 408 gchar *sipmsg_get_msgr_string(gchar *x_mms_im_format) {
 409         gchar *msgr_orig;
 410         gsize msgr_utf16_len;
 411         gchar *msgr_utf16;
 412         gchar *msgr_enc;
 413         gchar *res;
 414         int len;
 415
 416         if (!x_mms_im_format) return NULL;
 417         msgr_orig = g_strdup_printf("X-MMS-IM-Format: %s\r\n\r\n", x_mms_im_format);
 418         msgr_utf16 = g_convert(msgr_orig, -1, "UTF-16LE", "UTF-8", NULL, &msgr_utf16_len, NULL);
 419         g_free(msgr_orig);
 420         msgr_enc = g_base64_encode((guchar *) msgr_utf16, msgr_utf16_len);
 421         g_free(msgr_utf16);
 422         len = strlen(msgr_enc);
 423         while (msgr_enc[len - 1] == '=') len--;
 424         res = g_strndup(msgr_enc, len);
 425         g_free(msgr_enc);
 426         return res;
 427 }
 428
 429 gchar *sipmsg_apply_x_mms_im_format(const char *x_mms_im_format, gchar *body) {
 430         char *pre, *post;
 431         gchar *res;
 432
 433         if (!x_mms_im_format) {
 434                 return body ? g_strdup(body) : NULL;
 435         }
 436         msn_parse_format(x_mms_im_format, &pre, &post);
 437         res = g_strdup_printf("%s%s%s", pre ? pre :  "", body ? body : "", post ? post : "");
 438         g_free(pre);
 439         g_free(post);
 440         return res;
 441 }
 442
 443 struct html_message_data {
 444         gchar *ms_text_format;
 445         gchar *body;
 446         gboolean preferred;
 447 };
 448
 449 static void get_html_message_mime_cb(gpointer user_data,
 450                                      const gchar *type,
 451                                      const gchar *body,
 452                                      gsize length)
 453 {
 454         struct html_message_data *data = user_data;
 455
 456         if (!data->preferred) {
 457                 gboolean copy = FALSE;
 458
 459                 /* preferred format */
 460                 if (g_str_has_prefix(type, "text/html")) {
 461                         copy = TRUE;
 462                         data->preferred = TRUE;
 463
 464                 /* fallback format */
 465                 } else if (g_str_has_prefix(type, "text/plain")) {
 466                         copy = TRUE;
 467                 }
 468
 469                 if (copy) {
 470                         g_free(data->ms_text_format);
 471                         g_free(data->body);
 472                         data->ms_text_format = g_strdup(type);
 473                         data->body = g_strndup(body, length);
 474                 }
 475         }
 476 }
 477
 478 /* ms-text-format: text/plain; charset=UTF-8;msgr=WAAtAE0...DIADQAKAA0ACgA;ms-body=SGk= */
 479 gchar *get_html_message(const gchar *ms_text_format_in, const gchar *body_in)
 480 {
 481         gchar *msgr;
 482         gchar *res;
 483         gchar *ms_text_format = NULL;
 484         gchar *body = NULL;
 485
 486         if (g_str_has_prefix(ms_text_format_in, "multipart/related") ||
 487             g_str_has_prefix(ms_text_format_in, "multipart/alternative")) {
 488                 struct html_message_data data = { NULL, NULL, FALSE };
 489
 490                 sipe_mime_parts_foreach(ms_text_format_in, body_in,
 491                                         get_html_message_mime_cb, &data);
 492
 493                 ms_text_format = data.ms_text_format;
 494                 body = data.body;
 495
 496         } else {
 497                 ms_text_format = g_strdup(ms_text_format_in);
 498                 body = g_strdup(body_in);
 499         }
 500
 501         if (body) {
 502                 res = body;
 503         } else {
 504                 gchar *tmp = sipmsg_find_part_of_header(ms_text_format, "ms-body=", NULL, NULL);
 505                 gsize len;
 506                 if (!tmp) {
 507                         g_free(ms_text_format);
 508                         return NULL;
 509                 }
 510                 res = (gchar *) g_base64_decode(tmp, &len);
 511                 g_free(tmp);
 512                 if (!res) {
 513                         g_free(ms_text_format);
 514                         return NULL;
 515                 }
 516         }
 517
 518         if (!g_str_has_prefix(ms_text_format, "text/html")) { // NOT html
 519                 char *tmp = res;
 520                 res = g_markup_escape_text(res, -1); // as this is not html
 521                 g_free(tmp);
 522         }
 523
 524         msgr = sipmsg_find_part_of_header(ms_text_format, "msgr=", ";", NULL);
 525         if (msgr) {
 526                 gchar *x_mms_im_format = sipmsg_get_x_mms_im_format(msgr);
 527                 gchar *tmp = res;
 528                 g_free(msgr);
 529                 res = sipmsg_apply_x_mms_im_format(x_mms_im_format, res);
 530                 g_free(tmp);
 531                 g_free(x_mms_im_format);
 532         }
 533
 534         g_free(ms_text_format);
 535
 536         return res;
 537 }
 538
 539
 540
 541
 542
 543 //------------------------------------------------------------------------------------------
 544 //TEMP solution to include it here (copy from purple's msn protocol
 545 //How to reuse msn's util methods from sipe?
 546
 547 /* from internal.h */
 548 #define MSG_LEN 2048
 549 #define BUF_LEN MSG_LEN
 550
 551 static
 552 gchar *sipmsg_uri_unescape(const gchar *string)
 553 {
 554         gchar *unescaped, *tmp;
 555
 556         if (!string) return(NULL);
 557
 558 #if GLIB_CHECK_VERSION(2,16,0)
 559         unescaped = g_uri_unescape_string(string, NULL);
 560 #else
 561         /* loosely based on libpurple/util.c:purple_url_decode() */
 562         {
 563                 gsize i = 0;
 564                 gsize len = strlen(string);
 565
 566                 unescaped = g_malloc(len + 1);
 567                 while (len-- > 0) {
 568                         gchar c = *string++;
 569                         if ((len >= 2) && (c == '%')) {
 570                                 char hex[3];
 571                                 strncpy(hex, string, 2);
 572                                 hex[2] = '\0';
 573                                 c = strtol(hex, NULL, 16);
 574                                 string += 2;
 575                                 len -= 2;
 576                         }
 577                         unescaped[i++] = c;
 578                 }
 579                 unescaped[i] = '\0';
 580         }
 581 #endif
 582
 583         if (!g_utf8_validate(unescaped, -1, (const gchar **)&tmp))
 584                 *tmp = '\0';
 585
 586         return(unescaped);
 587 }
 588
 589 void
 590 msn_parse_format(const char *mime, char **pre_ret, char **post_ret)
 591 {
 592         char *cur;
 593         GString *pre  = g_string_new(NULL);
 594         GString *post = g_string_new(NULL);
 595         unsigned int colors[3];
 596
 597         if (pre_ret  != NULL) *pre_ret  = NULL;
 598         if (post_ret != NULL) *post_ret = NULL;
 599
 600         cur = strstr(mime, "FN=");
 601
 602         if (cur && (*(cur = cur + 3) != ';'))
 603         {
 604                 pre = g_string_append(pre, "<FONT FACE=\"");
 605
 606                 while (*cur && *cur != ';')
 607                 {
 608                         pre = g_string_append_c(pre, *cur);
 609                         cur++;
 610                 }
 611
 612                 pre = g_string_append(pre, "\">");
 613                 post = g_string_prepend(post, "</FONT>");
 614         }
 615
 616         cur = strstr(mime, "EF=");
 617
 618         if (cur && (*(cur = cur + 3) != ';'))
 619         {
 620                 while (*cur && *cur != ';')
 621                 {
 622                         pre = g_string_append_c(pre, '<');
 623                         pre = g_string_append_c(pre, *cur);
 624                         pre = g_string_append_c(pre, '>');
 625                         post = g_string_prepend_c(post, '>');
 626                         post = g_string_prepend_c(post, *cur);
 627                         post = g_string_prepend_c(post, '/');
 628                         post = g_string_prepend_c(post, '<');
 629                         cur++;
 630                 }
 631         }
 632
 633         cur = strstr(mime, "CO=");
 634
 635         if (cur && (*(cur = cur + 3) != ';'))
 636         {
 637                 int i;
 638
 639                 i = sscanf(cur, "%02x%02x%02x;", &colors[0], &colors[1], &colors[2]);
 640
 641                 if (i > 0)
 642                 {
 643                         char tag[64];
 644
 645                         if (i == 1)
 646                         {
 647                                 colors[1] = 0;
 648                                 colors[2] = 0;
 649                         }
 650                         else if (i == 2)
 651                         {
 652                                 unsigned int temp = colors[0];
 653
 654                                 colors[0] = colors[1];
 655                                 colors[1] = temp;
 656                                 colors[2] = 0;
 657                         }
 658                         else if (i == 3)
 659                         {
 660                                 unsigned int temp = colors[2];
 661
 662                                 colors[2] = colors[0];
 663                                 colors[0] = temp;
 664                         }
 665
 666                         /* hh is undefined in mingw's gcc 4.4
 667                          *  https://sourceforge.net/tracker/index.php?func=detail&aid=2818436&group_id=2435&atid=102435
 668                          */
 669                         g_snprintf(tag, sizeof(tag),
 670                                            "<FONT COLOR=\"#%02x%02x%02x\">",
 671                                            (unsigned char)colors[0], (unsigned char)colors[1], (unsigned char)colors[2]);
 672
 673                         pre = g_string_append(pre, tag);
 674                         post = g_string_prepend(post, "</FONT>");
 675                 }
 676         }
 677
 678         cur = strstr(mime, "RL=");
 679
 680         if (cur && (*(cur = cur + 3) != ';'))
 681         {
 682                 if (*cur == '1')
 683                 {
 684                         /* RTL text was received */
 685                         pre = g_string_append(pre, "<SPAN style=\"direction:rtl;text-align:right;\">");
 686                         post = g_string_prepend(post, "</SPAN>");
 687                 }
 688         }
 689
 690         cur = sipmsg_uri_unescape(pre->str);
 691         g_string_free(pre, TRUE);
 692
 693         if (pre_ret != NULL)
 694                 *pre_ret = cur;
 695         else
 696                 g_free(cur);
 697
 698         cur = sipmsg_uri_unescape(post->str);
 699         g_string_free(post, TRUE);
 700
 701         if (post_ret != NULL)
 702                 *post_ret = cur;
 703         else
 704                 g_free(cur);
 705 }
 706
 707 static const char *
 708 encode_spaces(const char *str)
 709 {
 710         static char buf[BUF_LEN];
 711         const char *c;
 712         char *d;
 713
 714         g_return_val_if_fail(str != NULL, NULL);
 715
 716         for (c = str, d = buf; *c != '\0'; c++)
 717         {
 718                 if (*c == ' ')
 719                 {
 720                         *d++ = '%';
 721                         *d++ = '2';
 722                         *d++ = '0';
 723                 }
 724                 else
 725                         *d++ = *c;
 726         }
 727         *d = '\0';
 728
 729         return buf;
 730 }
 731
 732 void
 733 msn_import_html(const char *html, char **attributes, char **message)
 734 {
 735         int len, retcount = 0;
 736         const char *c;
 737         char *msg;
 738         char *fontface = NULL;
 739         char fonteffect[4];
 740         char fontcolor[7];
 741         char direction = '0';
 742
 743         gboolean has_bold = FALSE;
 744         gboolean has_italic = FALSE;
 745         gboolean has_underline = FALSE;
 746         gboolean has_strikethrough = FALSE;
 747
 748         g_return_if_fail(html       != NULL);
 749         g_return_if_fail(attributes != NULL);
 750         g_return_if_fail(message    != NULL);
 751
 752         len = strlen(html);
 753         msg = g_malloc0(len + 1);
 754
 755         memset(fontcolor, 0, sizeof(fontcolor));
 756         strcat(fontcolor, "0");
 757         memset(fonteffect, 0, sizeof(fonteffect));
 758
 759         for (c = html; *c != '\0';)
 760         {
 761                 if (*c == '<')
 762                 {
 763                         if (!g_ascii_strncasecmp(c + 1, "br>", 3))
 764                         {
 765                                 msg[retcount++] = '\r';
 766                                 msg[retcount++] = '\n';
 767                                 c += 4;
 768                         }
 769                         else if (!g_ascii_strncasecmp(c + 1, "i>", 2))
 770                         {
 771                                 if (!has_italic)
 772                                 {
 773                                         strcat(fonteffect, "I");
 774                                         has_italic = TRUE;
 775                                 }
 776                                 c += 3;
 777                         }
 778                         else if (!g_ascii_strncasecmp(c + 1, "b>", 2))
 779                         {
 780                                 if (!has_bold)
 781                                 {
 782                                         strcat(fonteffect, "B");
 783                                         has_bold = TRUE;
 784                                 }
 785                                 c += 3;
 786                         }
 787                         else if (!g_ascii_strncasecmp(c + 1, "u>", 2))
 788                         {
 789                                 if (!has_underline)
 790                                 {
 791                                         strcat(fonteffect, "U");
 792                                         has_underline = TRUE;
 793                                 }
 794                                 c += 3;
 795                         }
 796                         else if (!g_ascii_strncasecmp(c + 1, "s>", 2))
 797                         {
 798                                 if (!has_strikethrough)
 799                                 {
 800                                         strcat(fonteffect, "S");
 801                                         has_strikethrough = TRUE;
 802                                 }
 803                                 c += 3;
 804                         }
 805                         else if (!g_ascii_strncasecmp(c + 1, "a href=\"", 8))
 806                         {
 807                                 c += 9;
 808
 809                                 if (!g_ascii_strncasecmp(c, "mailto:", 7))
 810                                         c += 7;
 811
 812                                 while ((*c != '\0') && g_ascii_strncasecmp(c, "\">", 2))
 813                                         msg[retcount++] = *c++;
 814
 815                                 if (*c != '\0')
 816                                         c += 2;
 817
 818                                 /* ignore descriptive string */
 819                                 while ((*c != '\0') && g_ascii_strncasecmp(c, "</a>", 4))
 820                                         c++;
 821
 822                                 if (*c != '\0')
 823                                         c += 4;
 824                         }
 825                         else if (!g_ascii_strncasecmp(c + 1, "span", 4))
 826                         {
 827                                 /* Bi-directional text support using CSS properties in span tags */
 828                                 c += 5;
 829
 830                                 while (*c != '\0' && *c != '>')
 831                                 {
 832                                         while (*c == ' ')
 833                                                 c++;
 834                                         if (!g_ascii_strncasecmp(c, "dir=\"rtl\"", 9))
 835                                         {
 836                                                 c += 9;
 837                                                 direction = '1';
 838                                         }
 839                                         else if (!g_ascii_strncasecmp(c, "style=\"", 7))
 840                                         {
 841                                                 /* Parse inline CSS attributes */
 842                                                 int attr_len = 0;
 843                                                 c += 7;
 844                                                 while (*(c + attr_len) != '\0' && *(c + attr_len) != '"')
 845                                                         attr_len++;
 846                                                 if (*(c + attr_len) == '"')
 847                                                 {
 848                                                         char *css_attributes;
 849                                                         char *attr_dir;
 850                                                         css_attributes = g_strndup(c, attr_len);
 851                                                         attr_dir = sipe_backend_markup_css_property(css_attributes, "direction");
 852                                                         g_free(css_attributes);
 853                                                         if (attr_dir && (!g_ascii_strncasecmp(attr_dir, "RTL", 3)))
 854                                                                 direction = '1';
 855                                                         g_free(attr_dir);
 856                                                 }
 857
 858                                         }
 859                                         else
 860                                         {
 861                                                 c++;
 862                                         }
 863                                 }
 864                                 if (*c == '>')
 865                                         c++;
 866                         }
 867                         else if (!g_ascii_strncasecmp(c + 1, "font", 4))
 868                         {
 869                                 c += 5;
 870
 871                                 while ((*c != '\0') && !g_ascii_strncasecmp(c, " ", 1))
 872                                         c++;
 873
 874                                 if (!g_ascii_strncasecmp(c, "color=\"#", 7))
 875                                 {
 876                                         c += 8;
 877
 878                                         fontcolor[0] = *(c + 4);
 879                                         fontcolor[1] = *(c + 5);
 880                                         fontcolor[2] = *(c + 2);
 881                                         fontcolor[3] = *(c + 3);
 882                                         fontcolor[4] = *c;
 883                                         fontcolor[5] = *(c + 1);
 884
 885                                         c += 8;
 886                                 }
 887                                 else if (!g_ascii_strncasecmp(c, "face=\"", 6))
 888                                 {
 889                                         const char *end = NULL;
 890                                         const char *comma = NULL;
 891                                         unsigned int namelen = 0;
 892
 893                                         c += 6;
 894                                         end = strchr(c, '\"');
 895                                         comma = strchr(c, ',');
 896
 897                                         if (comma == NULL || comma > end)
 898                                                 namelen = (unsigned int)(end - c);
 899                                         else
 900                                                 namelen = (unsigned int)(comma - c);
 901
 902                                         g_free(fontface);
 903                                         fontface = g_strndup(c, namelen);
 904                                         c = end + 2;
 905                                 }
 906                                 else
 907                                 {
 908                                         /* Drop all unrecognized/misparsed font tags */
 909                                         while ((*c != '\0') && g_ascii_strncasecmp(c, "\">", 2))
 910                                                 c++;
 911
 912                                         if (*c != '\0')
 913                                                 c += 2;
 914                                 }
 915                         }
 916                         else
 917                         {
 918                                 while ((*c != '\0') && (*c != '>'))
 919                                         c++;
 920                                 if (*c != '\0')
 921                                         c++;
 922                         }
 923                 }
 924                 else if (*c == '&')
 925                 {
 926                         if (!g_ascii_strncasecmp(c, "&lt;", 4))
 927                         {
 928                                 msg[retcount++] = '<';
 929                                 c += 4;
 930                         }
 931                         else if (!g_ascii_strncasecmp(c, "&gt;", 4))
 932                         {
 933                                 msg[retcount++] = '>';
 934                                 c += 4;
 935                         }
 936                         else if (!g_ascii_strncasecmp(c, "&nbsp;", 6))
 937                         {
 938                                 msg[retcount++] = ' ';
 939                                 c += 6;
 940                         }
 941                         else if (!g_ascii_strncasecmp(c, "&quot;", 6))
 942                         {
 943                                 msg[retcount++] = '"';
 944                                 c += 6;
 945                         }
 946                         else if (!g_ascii_strncasecmp(c, "&amp;", 5))
 947                         {
 948                                 msg[retcount++] = '&';
 949                                 c += 5;
 950                         }
 951                         else if (!g_ascii_strncasecmp(c, "&apos;", 6))
 952                         {
 953                                 msg[retcount++] = '\'';
 954                                 c += 6;
 955                         }
 956                         else
 957                                 msg[retcount++] = *c++;
 958                 }
 959                 else
 960                         msg[retcount++] = *c++;
 961         }
 962
 963         if (fontface == NULL)
 964                 fontface = g_strdup("MS Sans Serif");
 965
 966         *attributes = g_strdup_printf("FN=%s; EF=%s; CO=%s; PF=0; RL=%c",
 967                                                                   encode_spaces(fontface),
 968                                                                   fonteffect, fontcolor, direction);
 969         *message = msg;
 970
 971         g_free(fontface);
 972 }
 973 // End of TEMP
 974
 975 /*
 976   Local Variables:
 977   mode: c
 978   c-file-style: "bsd"
 979   indent-tabs-mode: t
 980   tab-width: 8
 981   End:
 982 */