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->responsestr = 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                 tmp = sipmsg_find_header(msg, "CSeq");
  94                 if(!tmp) {
  95                         /* SHOULD NOT HAPPEN */
  96                         msg->method = 0;
  97                 } else {
  98                         parts = g_strsplit(tmp, " ", 2);
  99                         msg->method = g_strdup(parts[1]);
 100                         g_strfreev(parts);
 101                 }
 102         }
 103         return msg;
 104 }
 105
 106 struct sipmsg *sipmsg_copy(const struct sipmsg *other) {
 107         struct sipmsg *msg = g_new0(struct sipmsg, 1);
 108         GSList *list;
 109
 110         msg->response           = other->response;
 111         msg->responsestr        = g_strdup(other->responsestr);
 112         msg->method             = g_strdup(other->method);
 113         msg->target             = g_strdup(other->target);
 114
 115         list = other->headers;
 116         while(list) {
 117                 struct sipnameval *elem = list->data;
 118                 sipmsg_add_header_now(msg, elem->name, elem->value);
 119                 list = list->next;
 120         }
 121
 122         list = other->new_headers;
 123         while(list) {
 124                 struct sipnameval *elem = list->data;
 125                 sipmsg_add_header(msg, elem->name, elem->value);
 126                 list = list->next;
 127         }
 128
 129         msg->bodylen    = other->bodylen;
 130         msg->body       = g_strdup(other->body);
 131         msg->signature  = g_strdup(other->signature);
 132         msg->rand       = g_strdup(other->rand);
 133         msg->num        = g_strdup(other->num);
 134
 135         return msg;
 136 }
 137
 138 char *sipmsg_to_string(const struct sipmsg *msg) {
 139         GSList *cur;
 140         GString *outstr = g_string_new("");
 141         struct sipnameval *elem;
 142
 143         if(msg->response)
 144                 g_string_append_printf(outstr, "SIP/2.0 %d Unknown\r\n",
 145                         msg->response);
 146         else
 147                 g_string_append_printf(outstr, "%s %s SIP/2.0\r\n",
 148                         msg->method, msg->target);
 149
 150         cur = msg->headers;
 151         while(cur) {
 152                 elem = cur->data;
 153                 /*Todo: remove the LFCR in a good way*/
 154                 /*if(sipe_strequal(elem->name,"Proxy-Authorization"))
 155                   g_string_append_printf(outstr, "%s: %s", elem->name,
 156                         elem->value);
 157                 else     */
 158                    g_string_append_printf(outstr, "%s: %s\r\n", elem->name,
 159                         elem->value);
 160                 cur = g_slist_next(cur);
 161         }
 162
 163         g_string_append_printf(outstr, "\r\n%s", msg->bodylen ? msg->body : "");
 164
 165         return g_string_free(outstr, FALSE);
 166 }
 167
 168 /**
 169  * Adds header to current message headers at specified position
 170  */
 171 void sipmsg_add_header_now_pos(struct sipmsg *msg, const gchar *name, const gchar *value, int pos) {
 172         struct sipnameval *element = g_new0(struct sipnameval,1);
 173
 174         /* SANITY CHECK: the calling code must be fixed if this happens! */
 175         if (!value) {
 176                 SIPE_DEBUG_ERROR("sipmsg_add_header_now_pos: NULL value for %s (%d)",
 177                                  name, pos);
 178                 value = "";
 179         }
 180
 181         element->name = g_strdup(name);
 182         element->value = g_strdup(value);
 183         msg->headers = g_slist_insert(msg->headers, element,pos);
 184 }
 185
 186 /**
 187  * Adds header to current message headers
 188  */
 189 void sipmsg_add_header_now(struct sipmsg *msg, const gchar *name, const gchar *value) {
 190         struct sipnameval *element = g_new0(struct sipnameval,1);
 191
 192         /* SANITY CHECK: the calling code must be fixed if this happens! */
 193         if (!value) {
 194                 SIPE_DEBUG_ERROR("sipmsg_add_header_now: NULL value for %s",
 195                                  name);
 196                 value = "";
 197         }
 198
 199         element->name = g_strdup(name);
 200         element->value = g_strdup(value);
 201         msg->headers = g_slist_append(msg->headers, element);
 202 }
 203
 204 /**
 205  * Adds header to separate storage for future merge
 206  */
 207 void sipmsg_add_header(struct sipmsg *msg, const gchar *name, const gchar *value) {
 208         struct sipnameval *element = g_new0(struct sipnameval,1);
 209
 210         /* SANITY CHECK: the calling code must be fixed if this happens! */
 211         if (!value) {
 212                 SIPE_DEBUG_ERROR("sipmsg_add_header: NULL value for %s", name);
 213                 value = "";
 214         }
 215
 216         element->name = g_strdup(name);
 217         element->value = g_strdup(value);
 218         msg->new_headers = g_slist_append(msg->new_headers, element);
 219 }
 220
 221 /**
 222  * Removes header if it's not in keepers array
 223  */
 224 void sipmsg_strip_headers(struct sipmsg *msg, const gchar *keepers[]) {
 225         GSList *entry;
 226         struct sipnameval *elem;
 227
 228         entry = msg->headers;
 229         while(entry) {
 230                 int i = 0;
 231                 gboolean keeper = FALSE;
 232
 233                 elem = entry->data;
 234                 while (keepers[i]) {
 235                         if (!g_strcasecmp(elem->name, keepers[i])) {
 236                                 keeper = TRUE;
 237                                 break;
 238                         }
 239                         i++;
 240                 }
 241
 242                 if (!keeper) {
 243                         GSList *to_delete = entry;
 244                         SIPE_DEBUG_INFO("sipmsg_strip_headers: removing %s", elem->name);
 245                         entry = g_slist_next(entry);
 246                         msg->headers = g_slist_delete_link(msg->headers, to_delete);
 247                         g_free(elem->name);
 248                         g_free(elem->value);
 249                         g_free(elem);
 250                 } else {
 251                         entry = g_slist_next(entry);
 252                 }
 253         }
 254 }
 255
 256 /**
 257  * Merges newly added headers to message
 258  */
 259 void sipmsg_merge_new_headers(struct sipmsg *msg) {
 260         while(msg->new_headers) {
 261                 msg->headers = g_slist_append(msg->headers, msg->new_headers->data);
 262                 msg->new_headers = g_slist_remove(msg->new_headers, msg->new_headers->data);
 263         }
 264 }
 265
 266 void sipmsg_free(struct sipmsg *msg) {
 267         sipe_utils_nameval_free(msg->headers);
 268         sipe_utils_nameval_free(msg->new_headers);
 269         g_free(msg->signature);
 270         g_free(msg->rand);
 271         g_free(msg->num);
 272         g_free(msg->responsestr);
 273         g_free(msg->method);
 274         g_free(msg->target);
 275         g_free(msg->body);
 276         g_free(msg);
 277 }
 278
 279 void sipmsg_remove_header_now(struct sipmsg *msg, const gchar *name) {
 280         struct sipnameval *elem;
 281         GSList *tmp = msg->headers;
 282         while(tmp) {
 283                 elem = tmp->data;
 284                 // OCS2005 can send the same header in either all caps or mixed case
 285                 if (sipe_strcase_equal(elem->name, name)) {
 286                         msg->headers = g_slist_remove(msg->headers, elem);
 287                         g_free(elem->name);
 288                         g_free(elem->value);
 289                         g_free(elem);
 290                         return;
 291                 }
 292                 tmp = g_slist_next(tmp);
 293         }
 294         return;
 295 }
 296
 297 const gchar *sipmsg_find_header(const struct sipmsg *msg, const gchar *name) {
 298         return sipe_utils_nameval_find_instance (msg->headers, name, 0);
 299 }
 300
 301 const gchar *sipmsg_find_header_instance(const struct sipmsg *msg, const gchar *name, int which) {
 302         return sipe_utils_nameval_find_instance(msg->headers, name, which);
 303 }
 304
 305 gchar *sipmsg_find_part_of_header(const char *hdr, const char * before, const char * after, const char * def) {
 306         const char *tmp;
 307         const char *tmp2;
 308         gchar *res2;
 309         if (!hdr) {
 310                 return NULL;
 311         }
 312
 313         //printf("partof %s w/ %s before and %s after\n", hdr, before, after);
 314
 315         tmp = before == NULL ? hdr : strstr(hdr, before);
 316         if (!tmp) {
 317                 //printf ("not found, returning null\n");
 318                 return (gchar *)def;
 319         }
 320
 321         if (before != NULL) {
 322                 tmp += strlen(before);
 323                 //printf ("tmp now %s\n", tmp);
 324         }
 325
 326         if (after != NULL && (tmp2 = strstr(tmp, after))) {
 327                 gchar * res = g_strndup(tmp, tmp2 - tmp);
 328                 //printf("returning %s\n", res);
 329                 return res;
 330         }
 331         res2 = g_strdup(tmp);
 332         //printf("returning %s\n", res2);
 333         return res2;
 334 }
 335
 336 /**
 337  * Parse EndPoints header from INVITE request
 338  * Returns a list of end points: contact URI plus optional epid.
 339  * You must free the values and the list.
 340  *
 341  * Example headers:
 342  * EndPoints: "alice alisson" <sip:alice@atlanta.local>, <sip:bob@atlanta.local>;epid=ebca82d94d, <sip:carol@atlanta.local>
 343  * EndPoints: "alice, alisson" <sip:alice@atlanta.local>, <sip:bob@atlanta.local>
 344  * EndPoints: "alice alisson" <sip:alice@atlanta.local>, "Super, Man" <sip:super@atlanta.local>
 345  *
 346  * @param header (in) EndPoints header contents
 347  *
 348  * @return GSList with struct sipendpoint as elements
 349  */
 350 GSList *sipmsg_parse_endpoints_header(const gchar *header)
 351 {
 352         GSList *list = NULL;
 353         gchar **parts = g_strsplit(header, ",", 0);
 354         gchar *part;
 355         int i;
 356
 357         for (i = 0; (part = parts[i]) != NULL; i++) {
 358                 /* Does the part contain a URI? */
 359                 gchar *contact = sipmsg_find_part_of_header(part, "<", ">", NULL);
 360                 if (contact) {
 361                         struct sipendpoint *end_point = g_new(struct sipendpoint, 1);
 362                         end_point->contact = contact;
 363                         end_point->epid = sipmsg_find_part_of_header(part, "epid=", NULL, NULL);
 364                         list = g_slist_append(list, end_point);
 365                 }
 366         }
 367         g_strfreev(parts);
 368
 369         return(list);
 370 }
 371
 372 void sipmsg_parse_p_asserted_identity(const gchar *header, gchar **sip_uri,
 373                                       gchar **tel_uri) {
 374         gchar **parts, **p;
 375
 376         *sip_uri = NULL;
 377         *tel_uri = NULL;
 378
 379         if (g_ascii_strncasecmp(header, "tel:", 4) == 0) {
 380                 *tel_uri = g_strdup(header);
 381                 return;
 382         }
 383
 384         parts = g_strsplit(header, ",", 0);
 385
 386         for (p = parts; *p; p++) {
 387                 gchar *uri = sipmsg_find_part_of_header(*p, "<", ">", NULL);
 388                 if (!uri)
 389                         continue;
 390
 391                 if (g_ascii_strncasecmp(uri, "sip:", 4) == 0) {
 392                         if (*sip_uri) {
 393                                 SIPE_DEBUG_WARNING_NOFORMAT("More than one "
 394                                         "sip: URI found in P-Asserted-Identity!");
 395                         } else {
 396                                 *sip_uri = uri;
 397                                 uri = NULL;
 398                         }
 399                 } else if (g_ascii_strncasecmp(uri, "tel:", 4) == 0){
 400                         if (*tel_uri) {
 401                                 SIPE_DEBUG_WARNING_NOFORMAT("More than one "
 402                                         "tel: URI found in P-Asserted-Identity!");
 403                         } else {
 404                                 *tel_uri = uri;
 405                                 uri = NULL;
 406                         }
 407                 }
 408
 409                 g_free(uri);
 410         }
 411
 412         g_strfreev(parts);
 413 }
 414
 415 /*
 416  *  sipmsg_find_auth_header will return the particular WWW-Authenticate
 417  *  header specified by *name.
 418  *
 419  *  Use this function when you want to look for a specific authentication
 420  *  method such as NTLM or Kerberos
 421  */
 422
 423 gchar *sipmsg_find_auth_header(struct sipmsg *msg, const gchar *name) {
 424         GSList *tmp;
 425         struct sipnameval *elem;
 426         int name_len = strlen(name);
 427         tmp = msg->headers;
 428         while(tmp) {
 429                 elem = tmp->data;
 430                 /* SIPE_DEBUG_INFO("Current header: %s", elem->value); */
 431                 if (elem && elem->name &&
 432                     (sipe_strcase_equal(elem->name,"WWW-Authenticate") ||
 433                      sipe_strcase_equal(elem->name,"Authentication-Info")) ) {
 434                         if (!g_strncasecmp((gchar *)elem->value, name, name_len)) {
 435                                 /* SIPE_DEBUG_INFO("elem->value: %s", elem->value); */
 436                                 return elem->value;
 437                         }
 438                 }
 439                 /* SIPE_DEBUG_INFO_NOFORMAT("moving to next header"); */
 440                 tmp = g_slist_next(tmp);
 441         }
 442         SIPE_DEBUG_INFO("auth header '%s' not found.", name);
 443         return NULL;
 444 }
 445
 446 gchar *sipmsg_get_x_mms_im_format(gchar *msgr) {
 447         gchar *msgr2;
 448         gsize msgr_dec64_len;
 449         guchar *msgr_dec64;
 450         gchar *msgr_utf8;
 451         gchar **lines;
 452         gchar **parts;
 453         gchar *x_mms_im_format;
 454         gchar *tmp;
 455
 456         if (!msgr) return NULL;
 457         msgr2 = g_strdup(msgr);
 458         while (strlen(msgr2) % 4 != 0) {
 459                 gchar *tmp_msgr2 = msgr2;
 460                 msgr2 = g_strdup_printf("%s=", msgr2);
 461                 g_free(tmp_msgr2);
 462         }
 463         msgr_dec64 = g_base64_decode(msgr2, &msgr_dec64_len);
 464         msgr_utf8 = g_convert((gchar *) msgr_dec64, msgr_dec64_len, "UTF-8", "UTF-16LE", NULL, NULL, NULL);
 465         g_free(msgr_dec64);
 466         g_free(msgr2);
 467         lines = g_strsplit(msgr_utf8,"\r\n\r\n",0);
 468         g_free(msgr_utf8);
 469         //@TODO: make extraction like parsing of message headers.
 470         parts = g_strsplit(lines[0],"X-MMS-IM-Format:",0);
 471         x_mms_im_format = g_strdup(parts[1]);
 472         g_strfreev(parts);
 473         g_strfreev(lines);
 474         tmp = x_mms_im_format;
 475         if (x_mms_im_format) {
 476                 while(*x_mms_im_format==' ' || *x_mms_im_format=='\t') x_mms_im_format++;
 477         }
 478         x_mms_im_format = g_strdup(x_mms_im_format);
 479         g_free(tmp);
 480         return x_mms_im_format;
 481 }
 482
 483 gchar *sipmsg_get_msgr_string(gchar *x_mms_im_format) {
 484         gchar *msgr_orig;
 485         gsize msgr_utf16_len;
 486         gchar *msgr_utf16;
 487         gchar *msgr_enc;
 488         gchar *res;
 489         int len;
 490
 491         if (!x_mms_im_format) return NULL;
 492         msgr_orig = g_strdup_printf("X-MMS-IM-Format: %s\r\n\r\n", x_mms_im_format);
 493         msgr_utf16 = g_convert(msgr_orig, -1, "UTF-16LE", "UTF-8", NULL, &msgr_utf16_len, NULL);
 494         g_free(msgr_orig);
 495         msgr_enc = g_base64_encode((guchar *) msgr_utf16, msgr_utf16_len);
 496         g_free(msgr_utf16);
 497         len = strlen(msgr_enc);
 498         while (msgr_enc[len - 1] == '=') len--;
 499         res = g_strndup(msgr_enc, len);
 500         g_free(msgr_enc);
 501         return res;
 502 }
 503
 504 gchar *sipmsg_apply_x_mms_im_format(const char *x_mms_im_format, gchar *body) {
 505         char *pre, *post;
 506         gchar *res;
 507
 508         if (!x_mms_im_format) {
 509                 return body ? g_strdup(body) : NULL;
 510         }
 511         msn_parse_format(x_mms_im_format, &pre, &post);
 512         res = g_strdup_printf("%s%s%s", pre ? pre :  "", body ? body : "", post ? post : "");
 513         g_free(pre);
 514         g_free(post);
 515         return res;
 516 }
 517
 518 struct html_message_data {
 519         gchar *ms_text_format;
 520         gchar *body;
 521         gboolean preferred;
 522 };
 523
 524 static void get_html_message_mime_cb(gpointer user_data,
 525                                      const GSList *fields,
 526                                      const gchar *body,
 527                                      gsize length)
 528 {
 529         const gchar *type = sipe_utils_nameval_find(fields, "Content-Type");
 530         struct html_message_data *data = user_data;
 531
 532         if (!data->preferred) {
 533                 gboolean copy = FALSE;
 534
 535                 /* preferred format */
 536                 if (g_str_has_prefix(type, "text/html")) {
 537                         copy = TRUE;
 538                         data->preferred = TRUE;
 539
 540                 /* fallback format */
 541                 } else if (g_str_has_prefix(type, "text/plain")) {
 542                         copy = TRUE;
 543                 }
 544
 545                 if (copy) {
 546                         g_free(data->ms_text_format);
 547                         g_free(data->body);
 548                         data->ms_text_format = g_strdup(type);
 549                         data->body = g_strndup(body, length);
 550                 }
 551         }
 552 }
 553
 554 /* ms-text-format: text/plain; charset=UTF-8;msgr=WAAtAE0...DIADQAKAA0ACgA;ms-body=SGk= */
 555 gchar *get_html_message(const gchar *ms_text_format_in, const gchar *body_in)
 556 {
 557         gchar *msgr;
 558         gchar *res;
 559         gchar *ms_text_format = NULL;
 560         gchar *body = NULL;
 561
 562         if (g_str_has_prefix(ms_text_format_in, "multipart/related") ||
 563             g_str_has_prefix(ms_text_format_in, "multipart/alternative")) {
 564                 struct html_message_data data = { NULL, NULL, FALSE };
 565
 566                 sipe_mime_parts_foreach(ms_text_format_in, body_in,
 567                                         get_html_message_mime_cb, &data);
 568
 569                 ms_text_format = data.ms_text_format;
 570                 body = data.body;
 571
 572         } else {
 573                 ms_text_format = g_strdup(ms_text_format_in);
 574                 body = g_strdup(body_in);
 575         }
 576
 577         if (body) {
 578                 res = body;
 579         } else {
 580                 gchar *tmp = sipmsg_find_part_of_header(ms_text_format, "ms-body=", NULL, NULL);
 581                 gsize len;
 582                 if (!tmp) {
 583                         g_free(ms_text_format);
 584                         return NULL;
 585                 }
 586                 res = (gchar *) g_base64_decode(tmp, &len);
 587                 g_free(tmp);
 588                 if (!res) {
 589                         g_free(ms_text_format);
 590                         return NULL;
 591                 }
 592         }
 593
 594         if (!g_str_has_prefix(ms_text_format, "text/html")) { // NOT html
 595                 char *tmp = res;
 596                 res = g_markup_escape_text(res, -1); // as this is not html
 597                 g_free(tmp);
 598         }
 599
 600         msgr = sipmsg_find_part_of_header(ms_text_format, "msgr=", ";", NULL);
 601         if (msgr) {
 602                 gchar *x_mms_im_format = sipmsg_get_x_mms_im_format(msgr);
 603                 gchar *tmp = res;
 604                 g_free(msgr);
 605                 res = sipmsg_apply_x_mms_im_format(x_mms_im_format, res);
 606                 g_free(tmp);
 607                 g_free(x_mms_im_format);
 608         }
 609
 610         g_free(ms_text_format);
 611
 612         return res;
 613 }
 614
 615
 616
 617
 618
 619 //------------------------------------------------------------------------------------------
 620 //TEMP solution to include it here (copy from purple's msn protocol
 621 //How to reuse msn's util methods from sipe?
 622
 623 /* from internal.h */
 624 #define MSG_LEN 2048
 625 #define BUF_LEN MSG_LEN
 626
 627 static
 628 gchar *sipmsg_uri_unescape(const gchar *string)
 629 {
 630         gchar *unescaped, *tmp;
 631
 632         if (!string) return(NULL);
 633
 634 #if GLIB_CHECK_VERSION(2,16,0)
 635         unescaped = g_uri_unescape_string(string, NULL);
 636 #else
 637         /* loosely based on libpurple/util.c:purple_url_decode() */
 638         {
 639                 gsize i = 0;
 640                 gsize len = strlen(string);
 641
 642                 unescaped = g_malloc(len + 1);
 643                 while (len-- > 0) {
 644                         gchar c = *string++;
 645                         if ((len >= 2) && (c == '%')) {
 646                                 char hex[3];
 647                                 strncpy(hex, string, 2);
 648                                 hex[2] = '\0';
 649                                 c = strtol(hex, NULL, 16);
 650                                 string += 2;
 651                                 len -= 2;
 652                         }
 653                         unescaped[i++] = c;
 654                 }
 655                 unescaped[i] = '\0';
 656         }
 657 #endif
 658
 659         if (!g_utf8_validate(unescaped, -1, (const gchar **)&tmp))
 660                 *tmp = '\0';
 661
 662         return(unescaped);
 663 }
 664
 665 void
 666 msn_parse_format(const char *mime, char **pre_ret, char **post_ret)
 667 {
 668         char *cur;
 669         GString *pre  = g_string_new(NULL);
 670         GString *post = g_string_new(NULL);
 671         unsigned int colors[3];
 672
 673         if (pre_ret  != NULL) *pre_ret  = NULL;
 674         if (post_ret != NULL) *post_ret = NULL;
 675
 676         cur = strstr(mime, "FN=");
 677
 678         if (cur && (*(cur = cur + 3) != ';'))
 679         {
 680                 pre = g_string_append(pre, "<FONT FACE=\"");
 681
 682                 while (*cur && *cur != ';')
 683                 {
 684                         pre = g_string_append_c(pre, *cur);
 685                         cur++;
 686                 }
 687
 688                 pre = g_string_append(pre, "\">");
 689                 post = g_string_prepend(post, "</FONT>");
 690         }
 691
 692         cur = strstr(mime, "EF=");
 693
 694         if (cur && (*(cur = cur + 3) != ';'))
 695         {
 696                 while (*cur && *cur != ';')
 697                 {
 698                         pre = g_string_append_c(pre, '<');
 699                         pre = g_string_append_c(pre, *cur);
 700                         pre = g_string_append_c(pre, '>');
 701                         post = g_string_prepend_c(post, '>');
 702                         post = g_string_prepend_c(post, *cur);
 703                         post = g_string_prepend_c(post, '/');
 704                         post = g_string_prepend_c(post, '<');
 705                         cur++;
 706                 }
 707         }
 708
 709         cur = strstr(mime, "CO=");
 710
 711         if (cur && (*(cur = cur + 3) != ';'))
 712         {
 713                 int i;
 714
 715                 i = sscanf(cur, "%02x%02x%02x;", &colors[0], &colors[1], &colors[2]);
 716
 717                 if (i > 0)
 718                 {
 719                         char tag[64];
 720
 721                         if (i == 1)
 722                         {
 723                                 colors[1] = 0;
 724                                 colors[2] = 0;
 725                         }
 726                         else if (i == 2)
 727                         {
 728                                 unsigned int temp = colors[0];
 729
 730                                 colors[0] = colors[1];
 731                                 colors[1] = temp;
 732                                 colors[2] = 0;
 733                         }
 734                         else if (i == 3)
 735                         {
 736                                 unsigned int temp = colors[2];
 737
 738                                 colors[2] = colors[0];
 739                                 colors[0] = temp;
 740                         }
 741
 742                         /* hh is undefined in mingw's gcc 4.4
 743                          *  https://sourceforge.net/tracker/index.php?func=detail&aid=2818436&group_id=2435&atid=102435
 744                          */
 745                         g_snprintf(tag, sizeof(tag),
 746                                            "<FONT COLOR=\"#%02x%02x%02x\">",
 747                                            (unsigned char)colors[0], (unsigned char)colors[1], (unsigned char)colors[2]);
 748
 749                         pre = g_string_append(pre, tag);
 750                         post = g_string_prepend(post, "</FONT>");
 751                 }
 752         }
 753
 754         cur = strstr(mime, "RL=");
 755
 756         if (cur && (*(cur = cur + 3) != ';'))
 757         {
 758                 if (*cur == '1')
 759                 {
 760                         /* RTL text was received */
 761                         pre = g_string_append(pre, "<SPAN style=\"direction:rtl;text-align:right;\">");
 762                         post = g_string_prepend(post, "</SPAN>");
 763                 }
 764         }
 765
 766         cur = sipmsg_uri_unescape(pre->str);
 767         g_string_free(pre, TRUE);
 768
 769         if (pre_ret != NULL)
 770                 *pre_ret = cur;
 771         else
 772                 g_free(cur);
 773
 774         cur = sipmsg_uri_unescape(post->str);
 775         g_string_free(post, TRUE);
 776
 777         if (post_ret != NULL)
 778                 *post_ret = cur;
 779         else
 780                 g_free(cur);
 781 }
 782
 783 static const char *
 784 encode_spaces(const char *str)
 785 {
 786         static char buf[BUF_LEN];
 787         const char *c;
 788         char *d;
 789
 790         g_return_val_if_fail(str != NULL, NULL);
 791
 792         for (c = str, d = buf; *c != '\0'; c++)
 793         {
 794                 if (*c == ' ')
 795                 {
 796                         *d++ = '%';
 797                         *d++ = '2';
 798                         *d++ = '0';
 799                 }
 800                 else
 801                         *d++ = *c;
 802         }
 803         *d = '\0';
 804
 805         return buf;
 806 }
 807
 808 void
 809 msn_import_html(const char *html, char **attributes, char **message)
 810 {
 811         int len, retcount = 0;
 812         const char *c;
 813         char *msg;
 814         char *fontface = NULL;
 815         char fonteffect[4];
 816         char fontcolor[7];
 817         char direction = '0';
 818
 819         gboolean has_bold = FALSE;
 820         gboolean has_italic = FALSE;
 821         gboolean has_underline = FALSE;
 822         gboolean has_strikethrough = FALSE;
 823
 824         g_return_if_fail(html       != NULL);
 825         g_return_if_fail(attributes != NULL);
 826         g_return_if_fail(message    != NULL);
 827
 828         len = strlen(html);
 829         msg = g_malloc0(len + 1);
 830
 831         memset(fontcolor, 0, sizeof(fontcolor));
 832         strcat(fontcolor, "0");
 833         memset(fonteffect, 0, sizeof(fonteffect));
 834
 835         for (c = html; *c != '\0';)
 836         {
 837                 if (*c == '<')
 838                 {
 839                         if (!g_ascii_strncasecmp(c + 1, "br>", 3))
 840                         {
 841                                 msg[retcount++] = '\r';
 842                                 msg[retcount++] = '\n';
 843                                 c += 4;
 844                         }
 845                         else if (!g_ascii_strncasecmp(c + 1, "i>", 2))
 846                         {
 847                                 if (!has_italic)
 848                                 {
 849                                         strcat(fonteffect, "I");
 850                                         has_italic = TRUE;
 851                                 }
 852                                 c += 3;
 853                         }
 854                         else if (!g_ascii_strncasecmp(c + 1, "b>", 2))
 855                         {
 856                                 if (!has_bold)
 857                                 {
 858                                         strcat(fonteffect, "B");
 859                                         has_bold = TRUE;
 860                                 }
 861                                 c += 3;
 862                         }
 863                         else if (!g_ascii_strncasecmp(c + 1, "u>", 2))
 864                         {
 865                                 if (!has_underline)
 866                                 {
 867                                         strcat(fonteffect, "U");
 868                                         has_underline = TRUE;
 869                                 }
 870                                 c += 3;
 871                         }
 872                         else if (!g_ascii_strncasecmp(c + 1, "s>", 2))
 873                         {
 874                                 if (!has_strikethrough)
 875                                 {
 876                                         strcat(fonteffect, "S");
 877                                         has_strikethrough = TRUE;
 878                                 }
 879                                 c += 3;
 880                         }
 881                         else if (!g_ascii_strncasecmp(c + 1, "a href=\"", 8))
 882                         {
 883                                 c += 9;
 884
 885                                 if (!g_ascii_strncasecmp(c, "mailto:", 7))
 886                                         c += 7;
 887
 888                                 while ((*c != '\0') && g_ascii_strncasecmp(c, "\">", 2))
 889                                         msg[retcount++] = *c++;
 890
 891                                 if (*c != '\0')
 892                                         c += 2;
 893
 894                                 /* ignore descriptive string */
 895                                 while ((*c != '\0') && g_ascii_strncasecmp(c, "</a>", 4))
 896                                         c++;
 897
 898                                 if (*c != '\0')
 899                                         c += 4;
 900                         }
 901                         else if (!g_ascii_strncasecmp(c + 1, "span", 4))
 902                         {
 903                                 /* Bi-directional text support using CSS properties in span tags */
 904                                 c += 5;
 905
 906                                 while (*c != '\0' && *c != '>')
 907                                 {
 908                                         while (*c == ' ')
 909                                                 c++;
 910                                         if (!g_ascii_strncasecmp(c, "dir=\"rtl\"", 9))
 911                                         {
 912                                                 c += 9;
 913                                                 direction = '1';
 914                                         }
 915                                         else if (!g_ascii_strncasecmp(c, "style=\"", 7))
 916                                         {
 917                                                 /* Parse inline CSS attributes */
 918                                                 int attr_len = 0;
 919                                                 c += 7;
 920                                                 while (*(c + attr_len) != '\0' && *(c + attr_len) != '"')
 921                                                         attr_len++;
 922                                                 if (*(c + attr_len) == '"')
 923                                                 {
 924                                                         char *css_attributes;
 925                                                         char *attr_dir;
 926                                                         css_attributes = g_strndup(c, attr_len);
 927                                                         attr_dir = sipe_backend_markup_css_property(css_attributes, "direction");
 928                                                         g_free(css_attributes);
 929                                                         if (attr_dir && (!g_ascii_strncasecmp(attr_dir, "RTL", 3)))
 930                                                                 direction = '1';
 931                                                         g_free(attr_dir);
 932                                                 }
 933
 934                                         }
 935                                         else
 936                                         {
 937                                                 c++;
 938                                         }
 939                                 }
 940                                 if (*c == '>')
 941                                         c++;
 942                         }
 943                         else if (!g_ascii_strncasecmp(c + 1, "font", 4))
 944                         {
 945                                 c += 5;
 946
 947                                 while ((*c != '\0') && !g_ascii_strncasecmp(c, " ", 1))
 948                                         c++;
 949
 950                                 if (!g_ascii_strncasecmp(c, "color=\"#", 7))
 951                                 {
 952                                         c += 8;
 953
 954                                         fontcolor[0] = *(c + 4);
 955                                         fontcolor[1] = *(c + 5);
 956                                         fontcolor[2] = *(c + 2);
 957                                         fontcolor[3] = *(c + 3);
 958                                         fontcolor[4] = *c;
 959                                         fontcolor[5] = *(c + 1);
 960
 961                                         c += 8;
 962                                 }
 963                                 else if (!g_ascii_strncasecmp(c, "face=\"", 6))
 964                                 {
 965                                         const char *end = NULL;
 966                                         const char *comma = NULL;
 967                                         unsigned int namelen = 0;
 968
 969                                         c += 6;
 970                                         end = strchr(c, '\"');
 971                                         comma = strchr(c, ',');
 972
 973                                         if (comma == NULL || comma > end)
 974                                                 namelen = (unsigned int)(end - c);
 975                                         else
 976                                                 namelen = (unsigned int)(comma - c);
 977
 978                                         g_free(fontface);
 979                                         fontface = g_strndup(c, namelen);
 980                                         c = end + 2;
 981                                 }
 982                                 else
 983                                 {
 984                                         /* Drop all unrecognized/misparsed font tags */
 985                                         while ((*c != '\0') && g_ascii_strncasecmp(c, "\">", 2))
 986                                                 c++;
 987
 988                                         if (*c != '\0')
 989                                                 c += 2;
 990                                 }
 991                         }
 992                         else
 993                         {
 994                                 while ((*c != '\0') && (*c != '>'))
 995                                         c++;
 996                                 if (*c != '\0')
 997                                         c++;
 998                         }
 999                 }
1000                 else if (*c == '&')
1001                 {
1002                         if (!g_ascii_strncasecmp(c, "&lt;", 4))
1003                         {
1004                                 msg[retcount++] = '<';
1005                                 c += 4;
1006                         }
1007                         else if (!g_ascii_strncasecmp(c, "&gt;", 4))
1008                         {
1009                                 msg[retcount++] = '>';
1010                                 c += 4;
1011                         }
1012                         else if (!g_ascii_strncasecmp(c, "&nbsp;", 6))
1013                         {
1014                                 msg[retcount++] = ' ';
1015                                 c += 6;
1016                         }
1017                         else if (!g_ascii_strncasecmp(c, "&quot;", 6))
1018                         {
1019                                 msg[retcount++] = '"';
1020                                 c += 6;
1021                         }
1022                         else if (!g_ascii_strncasecmp(c, "&amp;", 5))
1023                         {
1024                                 msg[retcount++] = '&';
1025                                 c += 5;
1026                         }
1027                         else if (!g_ascii_strncasecmp(c, "&apos;", 6))
1028                         {
1029                                 msg[retcount++] = '\'';
1030                                 c += 6;
1031                         }
1032                         else
1033                                 msg[retcount++] = *c++;
1034                 }
1035                 else
1036                         msg[retcount++] = *c++;
1037         }
1038
1039         if (fontface == NULL)
1040                 fontface = g_strdup("MS Sans Serif");
1041
1042         *attributes = g_strdup_printf("FN=%s; EF=%s; CO=%s; PF=0; RL=%c",
1043                                                                   encode_spaces(fontface),
1044                                                                   fonteffect, fontcolor, direction);
1045         *message = msg;
1046
1047         g_free(fontface);
1048 }
1049 // End of TEMP
1050
1051 /*
1052   Local Variables:
1053   mode: c
1054   c-file-style: "bsd"
1055   indent-tabs-mode: t
1056   tab-width: 8
1057   End:
1058 */