src/core/sipmsg.c

   1 /**
   2  * @file sipmsg.c
   3  *
   4  * pidgin-sipe
   5  *
   6  * Copyright (C) 2010-11 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         if (msg) {
 268                 sipe_utils_nameval_free(msg->headers);
 269                 sipe_utils_nameval_free(msg->new_headers);
 270                 g_free(msg->signature);
 271                 g_free(msg->rand);
 272                 g_free(msg->num);
 273                 g_free(msg->responsestr);
 274                 g_free(msg->method);
 275                 g_free(msg->target);
 276                 g_free(msg->body);
 277                 g_free(msg);
 278         }
 279 }
 280
 281 void sipmsg_remove_header_now(struct sipmsg *msg, const gchar *name) {
 282         struct sipnameval *elem;
 283         GSList *tmp = msg->headers;
 284         while(tmp) {
 285                 elem = tmp->data;
 286                 // OCS2005 can send the same header in either all caps or mixed case
 287                 if (sipe_strcase_equal(elem->name, name)) {
 288                         msg->headers = g_slist_remove(msg->headers, elem);
 289                         g_free(elem->name);
 290                         g_free(elem->value);
 291                         g_free(elem);
 292                         return;
 293                 }
 294                 tmp = g_slist_next(tmp);
 295         }
 296         return;
 297 }
 298
 299 const gchar *sipmsg_find_header(const struct sipmsg *msg, const gchar *name) {
 300         return sipe_utils_nameval_find_instance (msg->headers, name, 0);
 301 }
 302
 303 const gchar *sipmsg_find_header_instance(const struct sipmsg *msg, const gchar *name, int which) {
 304         return sipe_utils_nameval_find_instance(msg->headers, name, which);
 305 }
 306
 307 gchar *sipmsg_find_part_of_header(const char *hdr, const char * before, const char * after, const char * def) {
 308         const char *tmp;
 309         const char *tmp2;
 310         gchar *res2;
 311         if (!hdr) {
 312                 return NULL;
 313         }
 314
 315         //printf("partof %s w/ %s before and %s after\n", hdr, before, after);
 316
 317         tmp = before == NULL ? hdr : strstr(hdr, before);
 318         if (!tmp) {
 319                 //printf ("not found, returning null\n");
 320                 return (gchar *)def;
 321         }
 322
 323         if (before != NULL) {
 324                 tmp += strlen(before);
 325                 //printf ("tmp now %s\n", tmp);
 326         }
 327
 328         if (after != NULL && (tmp2 = strstr(tmp, after))) {
 329                 gchar * res = g_strndup(tmp, tmp2 - tmp);
 330                 //printf("returning %s\n", res);
 331                 return res;
 332         }
 333         res2 = g_strdup(tmp);
 334         //printf("returning %s\n", res2);
 335         return res2;
 336 }
 337
 338 int sipmsg_parse_cseq(struct sipmsg *msg)
 339 {
 340         int res = -1;
 341         gchar **items;
 342         items = g_strsplit(sipmsg_find_header(msg, "CSeq"), " ", 1);
 343         if (items[0]) {
 344                 res = atoi(items[0]);
 345         }
 346         g_strfreev(items);
 347         return res;
 348 }
 349
 350 /**
 351  * Parse EndPoints header from INVITE request
 352  * Returns a list of end points: contact URI plus optional epid.
 353  * You must free the values and the list.
 354  *
 355  * Example headers:
 356  * EndPoints: "alice alisson" <sip:alice@atlanta.local>, <sip:bob@atlanta.local>;epid=ebca82d94d, <sip:carol@atlanta.local>
 357  * EndPoints: "alice, alisson" <sip:alice@atlanta.local>, <sip:bob@atlanta.local>
 358  * EndPoints: "alice alisson" <sip:alice@atlanta.local>, "Super, Man" <sip:super@atlanta.local>
 359  *
 360  * @param header (in) EndPoints header contents
 361  *
 362  * @return GSList with struct sipendpoint as elements
 363  */
 364 GSList *sipmsg_parse_endpoints_header(const gchar *header)
 365 {
 366         GSList *list = NULL;
 367         gchar **parts = g_strsplit(header, ",", 0);
 368         gchar *part;
 369         int i;
 370
 371         for (i = 0; (part = parts[i]) != NULL; i++) {
 372                 /* Does the part contain a URI? */
 373                 gchar *contact = sipmsg_find_part_of_header(part, "<", ">", NULL);
 374                 if (contact) {
 375                         struct sipendpoint *end_point = g_new(struct sipendpoint, 1);
 376                         end_point->contact = contact;
 377                         end_point->epid = sipmsg_find_part_of_header(part, "epid=", NULL, NULL);
 378                         list = g_slist_append(list, end_point);
 379                 }
 380         }
 381         g_strfreev(parts);
 382
 383         return(list);
 384 }
 385
 386 void sipmsg_parse_p_asserted_identity(const gchar *header, gchar **sip_uri,
 387                                       gchar **tel_uri) {
 388         gchar **parts, **p;
 389
 390         *sip_uri = NULL;
 391         *tel_uri = NULL;
 392
 393         if (g_ascii_strncasecmp(header, "tel:", 4) == 0) {
 394                 *tel_uri = g_strdup(header);
 395                 return;
 396         }
 397
 398         parts = g_strsplit(header, ",", 0);
 399
 400         for (p = parts; *p; p++) {
 401                 gchar *uri = sipmsg_find_part_of_header(*p, "<", ">", NULL);
 402                 if (!uri)
 403                         continue;
 404
 405                 if (g_ascii_strncasecmp(uri, "sip:", 4) == 0) {
 406                         if (*sip_uri) {
 407                                 SIPE_DEBUG_WARNING_NOFORMAT("More than one "
 408                                         "sip: URI found in P-Asserted-Identity!");
 409                         } else {
 410                                 *sip_uri = uri;
 411                                 uri = NULL;
 412                         }
 413                 } else if (g_ascii_strncasecmp(uri, "tel:", 4) == 0){
 414                         if (*tel_uri) {
 415                                 SIPE_DEBUG_WARNING_NOFORMAT("More than one "
 416                                         "tel: URI found in P-Asserted-Identity!");
 417                         } else {
 418                                 *tel_uri = uri;
 419                                 uri = NULL;
 420                         }
 421                 }
 422
 423                 g_free(uri);
 424         }
 425
 426         g_strfreev(parts);
 427 }
 428
 429 /*
 430  *  sipmsg_find_auth_header will return the particular WWW-Authenticate
 431  *  header specified by *name.
 432  *
 433  *  Use this function when you want to look for a specific authentication
 434  *  method such as NTLM or Kerberos
 435  */
 436
 437 gchar *sipmsg_find_auth_header(struct sipmsg *msg, const gchar *name) {
 438         GSList *tmp;
 439         struct sipnameval *elem;
 440         int name_len = strlen(name);
 441         tmp = msg->headers;
 442         while(tmp) {
 443                 elem = tmp->data;
 444                 /* SIPE_DEBUG_INFO("Current header: %s", elem->value); */
 445                 if (elem && elem->name &&
 446                     (sipe_strcase_equal(elem->name,"WWW-Authenticate") ||
 447                      sipe_strcase_equal(elem->name,"Authentication-Info")) ) {
 448                         if (!g_strncasecmp((gchar *)elem->value, name, name_len)) {
 449                                 /* SIPE_DEBUG_INFO("elem->value: %s", elem->value); */
 450                                 return elem->value;
 451                         }
 452                 }
 453                 /* SIPE_DEBUG_INFO_NOFORMAT("moving to next header"); */
 454                 tmp = g_slist_next(tmp);
 455         }
 456         SIPE_DEBUG_INFO("auth header '%s' not found.", name);
 457         return NULL;
 458 }
 459
 460 /**
 461  * Parses headers-like 'msgr' attribute of INVITE's 'ms_text_format' header.
 462  * Then retrieves value of 'X-MMS-IM-Format'.
 463
 464  * 'msgr' typically looks like:
 465  * X-MMS-IM-Format: FN=Microsoft%20Sans%20Serif; EF=BI; CO=800000; CS=0; PF=22
 466  */
 467 static gchar *sipmsg_get_x_mms_im_format(gchar *msgr) {
 468         gchar *msgr2;
 469         gsize msgr_dec64_len;
 470         guchar *msgr_dec64;
 471         gchar *msgr_utf8;
 472         gchar **lines;
 473         gchar **parts;
 474         gchar *x_mms_im_format;
 475         gchar *tmp;
 476
 477         if (!msgr) return NULL;
 478         msgr2 = g_strdup(msgr);
 479         while (strlen(msgr2) % 4 != 0) {
 480                 gchar *tmp_msgr2 = msgr2;
 481                 msgr2 = g_strdup_printf("%s=", msgr2);
 482                 g_free(tmp_msgr2);
 483         }
 484         msgr_dec64 = g_base64_decode(msgr2, &msgr_dec64_len);
 485         msgr_utf8 = g_convert((gchar *) msgr_dec64, msgr_dec64_len, "UTF-8", "UTF-16LE", NULL, NULL, NULL);
 486         g_free(msgr_dec64);
 487         g_free(msgr2);
 488         lines = g_strsplit(msgr_utf8,"\r\n\r\n",0);
 489         g_free(msgr_utf8);
 490         //@TODO: make extraction like parsing of message headers.
 491         parts = g_strsplit(lines[0],"X-MMS-IM-Format:",0);
 492         x_mms_im_format = g_strdup(parts[1]);
 493         g_strfreev(parts);
 494         g_strfreev(lines);
 495         tmp = x_mms_im_format;
 496         if (x_mms_im_format) {
 497                 while(*x_mms_im_format==' ' || *x_mms_im_format=='\t') x_mms_im_format++;
 498         }
 499         x_mms_im_format = g_strdup(x_mms_im_format);
 500         g_free(tmp);
 501         return x_mms_im_format;
 502 }
 503
 504 gchar *sipmsg_get_msgr_string(gchar *x_mms_im_format) {
 505         gchar *msgr_orig;
 506         gsize msgr_utf16_len;
 507         gchar *msgr_utf16;
 508         gchar *msgr_enc;
 509         gchar *res;
 510         int len;
 511
 512         if (!x_mms_im_format) return NULL;
 513         msgr_orig = g_strdup_printf("X-MMS-IM-Format: %s\r\n\r\n", x_mms_im_format);
 514         msgr_utf16 = g_convert(msgr_orig, -1, "UTF-16LE", "UTF-8", NULL, &msgr_utf16_len, NULL);
 515         g_free(msgr_orig);
 516         msgr_enc = g_base64_encode((guchar *) msgr_utf16, msgr_utf16_len);
 517         g_free(msgr_utf16);
 518         len = strlen(msgr_enc);
 519         while (msgr_enc[len - 1] == '=') len--;
 520         res = g_strndup(msgr_enc, len);
 521         g_free(msgr_enc);
 522         return res;
 523 }
 524
 525 static void msn_parse_format(const char *mime, char **pre_ret, char **post_ret);
 526
 527 /**
 528  * Translates X-MMS-IM format to HTML presentation.
 529  */
 530 static gchar *sipmsg_apply_x_mms_im_format(const char *x_mms_im_format, gchar *body) {
 531         char *pre, *post;
 532         gchar *res;
 533
 534         if (!x_mms_im_format) {
 535                 return body ? g_strdup(body) : NULL;
 536         }
 537         msn_parse_format(x_mms_im_format, &pre, &post);
 538         res = g_strdup_printf("%s%s%s", pre ? pre :  "", body ? body : "", post ? post : "");
 539         g_free(pre);
 540         g_free(post);
 541         return res;
 542 }
 543
 544 struct html_message_data {
 545         gchar *ms_text_format;
 546         gchar *body;
 547         gboolean preferred;
 548 };
 549
 550 static void get_html_message_mime_cb(gpointer user_data,
 551                                      const GSList *fields,
 552                                      const gchar *body,
 553                                      gsize length)
 554 {
 555         const gchar *type = sipe_utils_nameval_find(fields, "Content-Type");
 556         struct html_message_data *data = user_data;
 557
 558         if (!data->preferred) {
 559                 gboolean copy = FALSE;
 560
 561                 /* preferred format */
 562                 if (g_str_has_prefix(type, "text/html")) {
 563                         copy = TRUE;
 564                         data->preferred = TRUE;
 565
 566                 /* fallback format */
 567                 } else if (g_str_has_prefix(type, "text/plain")) {
 568                         copy = TRUE;
 569                 }
 570
 571                 if (copy) {
 572                         g_free(data->ms_text_format);
 573                         g_free(data->body);
 574                         data->ms_text_format = g_strdup(type);
 575                         data->body = g_strndup(body, length);
 576                 }
 577         }
 578 }
 579
 580 /* ms-text-format: text/plain; charset=UTF-8;msgr=WAAtAE0...DIADQAKAA0ACgA;ms-body=SGk= */
 581 gchar *get_html_message(const gchar *ms_text_format_in, const gchar *body_in)
 582 {
 583         gchar *msgr;
 584         gchar *res;
 585         gchar *ms_text_format = NULL;
 586         gchar *body = NULL;
 587
 588         if (g_str_has_prefix(ms_text_format_in, "multipart/related") ||
 589             g_str_has_prefix(ms_text_format_in, "multipart/alternative")) {
 590                 struct html_message_data data = { NULL, NULL, FALSE };
 591
 592                 sipe_mime_parts_foreach(ms_text_format_in, body_in,
 593                                         get_html_message_mime_cb, &data);
 594
 595                 ms_text_format = data.ms_text_format;
 596                 body = data.body;
 597
 598         } else {
 599                 ms_text_format = g_strdup(ms_text_format_in);
 600                 body = g_strdup(body_in);
 601         }
 602
 603         if (body) {
 604                 res = body;
 605         } else {
 606                 gchar *tmp = sipmsg_find_part_of_header(ms_text_format, "ms-body=", NULL, NULL);
 607                 gsize len;
 608                 if (!tmp) {
 609                         g_free(ms_text_format);
 610                         return NULL;
 611                 }
 612                 res = (gchar *) g_base64_decode(tmp, &len);
 613                 g_free(tmp);
 614                 if (!res) {
 615                         g_free(ms_text_format);
 616                         return NULL;
 617                 }
 618         }
 619
 620         if (g_str_has_prefix(ms_text_format, "text/html")) {
 621                 /*
 622                  * HTML uses tags for formatting, not line breaks. But
 623                  * clients still might render them, so we need to remove
 624                  * them to avoid incorrect text rendering.
 625                  */
 626                 gchar *d = res;
 627                 const gchar *s = res;
 628                 gchar c;
 629
 630                 /* No ANSI C nor glib function seems to exist for this :-( */
 631                 while ((c = *s++))
 632                         if ((c != '\n') && (c != '\r'))
 633                                 *d++ = c;
 634                 *d = c;
 635
 636         } else {
 637                 char *tmp = res;
 638                 res = g_markup_escape_text(res, -1); // as this is not html
 639                 g_free(tmp);
 640         }
 641
 642         msgr = sipmsg_find_part_of_header(ms_text_format, "msgr=", ";", NULL);
 643         if (msgr) {
 644                 gchar *x_mms_im_format = sipmsg_get_x_mms_im_format(msgr);
 645                 gchar *tmp = res;
 646                 g_free(msgr);
 647                 res = sipmsg_apply_x_mms_im_format(x_mms_im_format, res);
 648                 g_free(tmp);
 649                 g_free(x_mms_im_format);
 650         }
 651
 652         g_free(ms_text_format);
 653
 654         return res;
 655 }
 656
 657 static gchar *
 658 get_reason(struct sipmsg *msg, const gchar *header)
 659 {
 660         const gchar *diagnostics = sipmsg_find_header(msg, header);
 661         if (diagnostics)
 662                 return sipmsg_find_part_of_header(diagnostics, "reason=\"", "\"", NULL);
 663
 664         return NULL;
 665 }
 666
 667 gchar *
 668 sipmsg_get_ms_diagnostics_reason(struct sipmsg *msg)
 669 {
 670         return get_reason(msg, "ms-diagnostics");
 671 }
 672
 673 gchar *
 674 sipmsg_get_ms_diagnostics_public_reason(struct sipmsg *msg)
 675 {
 676         return get_reason(msg, "ms-diagnostics-public");
 677 }
 678
 679 int
 680 sipmsg_parse_warning(struct sipmsg *msg, gchar **reason)
 681 {
 682         /*
 683          * Example header:
 684          * Warning: 310 lcs.microsoft.com "You are currently not using the recommended version of the client"
 685          */
 686         const gchar *hdr = sipmsg_find_header(msg, "Warning");
 687         int code = -1;
 688
 689         if (reason)
 690                 *reason = NULL;
 691
 692         if (hdr) {
 693                 gchar **parts = g_strsplit(hdr, " ", 3);
 694
 695                 if (parts[0]) {
 696                         code = atoi(parts[0]);
 697
 698                         if (reason && parts[1] && parts[2]) {
 699                                 size_t len = strlen(parts[2]);
 700                                 if (len > 2 && parts[2][0] == '"' && parts[2][len - 1] == '"')
 701                                         *reason = g_strndup(parts[2] + 1, len - 2);
 702                         }
 703                 }
 704
 705                 g_strfreev(parts);
 706         }
 707
 708         return code;
 709 }
 710
 711
 712
 713 //------------------------------------------------------------------------------------------
 714 //TEMP solution to include it here (copy from purple's msn protocol
 715 //How to reuse msn's util methods from sipe?
 716
 717 /* from internal.h */
 718 #define MSG_LEN 2048
 719 #define BUF_LEN MSG_LEN
 720
 721 void
 722 msn_parse_format(const char *mime, char **pre_ret, char **post_ret)
 723 {
 724         char *cur;
 725         GString *pre  = g_string_new(NULL);
 726         GString *post = g_string_new(NULL);
 727         unsigned int colors[3];
 728
 729         if (pre_ret  != NULL) *pre_ret  = NULL;
 730         if (post_ret != NULL) *post_ret = NULL;
 731
 732         cur = strstr(mime, "FN=");
 733
 734         if (cur && (*(cur = cur + 3) != ';'))
 735         {
 736                 pre = g_string_append(pre, "<FONT FACE=\"");
 737
 738                 while (*cur && *cur != ';')
 739                 {
 740                         pre = g_string_append_c(pre, *cur);
 741                         cur++;
 742                 }
 743
 744                 pre = g_string_append(pre, "\">");
 745                 post = g_string_prepend(post, "</FONT>");
 746         }
 747
 748         cur = strstr(mime, "EF=");
 749
 750         if (cur && (*(cur = cur + 3) != ';'))
 751         {
 752                 while (*cur && *cur != ';')
 753                 {
 754                         pre = g_string_append_c(pre, '<');
 755                         pre = g_string_append_c(pre, *cur);
 756                         pre = g_string_append_c(pre, '>');
 757                         post = g_string_prepend_c(post, '>');
 758                         post = g_string_prepend_c(post, *cur);
 759                         post = g_string_prepend_c(post, '/');
 760                         post = g_string_prepend_c(post, '<');
 761                         cur++;
 762                 }
 763         }
 764
 765         cur = strstr(mime, "CO=");
 766
 767         if (cur && (*(cur = cur + 3) != ';'))
 768         {
 769                 int i;
 770
 771                 i = sscanf(cur, "%02x%02x%02x;", &colors[0], &colors[1], &colors[2]);
 772
 773                 if (i > 0)
 774                 {
 775                         char tag[64];
 776
 777                         if (i == 1)
 778                         {
 779                                 colors[1] = 0;
 780                                 colors[2] = 0;
 781                         }
 782                         else if (i == 2)
 783                         {
 784                                 unsigned int temp = colors[0];
 785
 786                                 colors[0] = colors[1];
 787                                 colors[1] = temp;
 788                                 colors[2] = 0;
 789                         }
 790                         else if (i == 3)
 791                         {
 792                                 unsigned int temp = colors[2];
 793
 794                                 colors[2] = colors[0];
 795                                 colors[0] = temp;
 796                         }
 797
 798                         /* hh is undefined in mingw's gcc 4.4
 799                          *  https://sourceforge.net/tracker/index.php?func=detail&aid=2818436&group_id=2435&atid=102435
 800                          */
 801                         g_snprintf(tag, sizeof(tag),
 802                                            "<FONT COLOR=\"#%02x%02x%02x\">",
 803                                            (unsigned char)colors[0], (unsigned char)colors[1], (unsigned char)colors[2]);
 804
 805                         pre = g_string_append(pre, tag);
 806                         post = g_string_prepend(post, "</FONT>");
 807                 }
 808         }
 809
 810         cur = strstr(mime, "RL=");
 811
 812         if (cur && (*(cur = cur + 3) != ';'))
 813         {
 814                 if (*cur == '1')
 815                 {
 816                         /* RTL text was received */
 817                         pre = g_string_append(pre, "<SPAN style=\"direction:rtl;text-align:right;\">");
 818                         post = g_string_prepend(post, "</SPAN>");
 819                 }
 820         }
 821
 822         cur = sipe_utils_uri_unescape(pre->str);
 823         g_string_free(pre, TRUE);
 824
 825         if (pre_ret != NULL)
 826                 *pre_ret = cur;
 827         else
 828                 g_free(cur);
 829
 830         cur = sipe_utils_uri_unescape(post->str);
 831         g_string_free(post, TRUE);
 832
 833         if (post_ret != NULL)
 834                 *post_ret = cur;
 835         else
 836                 g_free(cur);
 837 }
 838
 839 static const char *
 840 encode_spaces(const char *str)
 841 {
 842         static char buf[BUF_LEN];
 843         const char *c;
 844         char *d;
 845
 846         g_return_val_if_fail(str != NULL, NULL);
 847
 848         for (c = str, d = buf; *c != '\0'; c++)
 849         {
 850                 if (*c == ' ')
 851                 {
 852                         *d++ = '%';
 853                         *d++ = '2';
 854                         *d++ = '0';
 855                 }
 856                 else
 857                         *d++ = *c;
 858         }
 859         *d = '\0';
 860
 861         return buf;
 862 }
 863
 864 void
 865 sipe_parse_html(const char *html, char **attributes, char **message)
 866 {
 867         int len, retcount = 0;
 868         const char *c;
 869         char *msg;
 870         char *fontface = NULL;
 871         char fonteffect[4];
 872         char fontcolor[7];
 873         char direction = '0';
 874
 875         gboolean has_bold = FALSE;
 876         gboolean has_italic = FALSE;
 877         gboolean has_underline = FALSE;
 878         gboolean has_strikethrough = FALSE;
 879
 880         g_return_if_fail(html       != NULL);
 881         g_return_if_fail(attributes != NULL);
 882         g_return_if_fail(message    != NULL);
 883
 884         len = strlen(html);
 885         msg = g_malloc0(len + 1);
 886
 887         memset(fontcolor, 0, sizeof(fontcolor));
 888         strcat(fontcolor, "0");
 889         memset(fonteffect, 0, sizeof(fonteffect));
 890
 891         for (c = html; *c != '\0';)
 892         {
 893                 if (*c == '<')
 894                 {
 895                         if (!g_ascii_strncasecmp(c + 1, "br>", 3))
 896                         {
 897                                 msg[retcount++] = '\r';
 898                                 msg[retcount++] = '\n';
 899                                 c += 4;
 900                         }
 901                         else if (!g_ascii_strncasecmp(c + 1, "i>", 2))
 902                         {
 903                                 if (!has_italic)
 904                                 {
 905                                         strcat(fonteffect, "I");
 906                                         has_italic = TRUE;
 907                                 }
 908                                 c += 3;
 909                         }
 910                         else if (!g_ascii_strncasecmp(c + 1, "b>", 2))
 911                         {
 912                                 if (!has_bold)
 913                                 {
 914                                         strcat(fonteffect, "B");
 915                                         has_bold = TRUE;
 916                                 }
 917                                 c += 3;
 918                         }
 919                         else if (!g_ascii_strncasecmp(c + 1, "u>", 2))
 920                         {
 921                                 if (!has_underline)
 922                                 {
 923                                         strcat(fonteffect, "U");
 924                                         has_underline = TRUE;
 925                                 }
 926                                 c += 3;
 927                         }
 928                         else if (!g_ascii_strncasecmp(c + 1, "s>", 2))
 929                         {
 930                                 if (!has_strikethrough)
 931                                 {
 932                                         strcat(fonteffect, "S");
 933                                         has_strikethrough = TRUE;
 934                                 }
 935                                 c += 3;
 936                         }
 937                         else if (!g_ascii_strncasecmp(c + 1, "a href=\"", 8))
 938                         {
 939                                 c += 9;
 940
 941                                 if (!g_ascii_strncasecmp(c, "mailto:", 7))
 942                                         c += 7;
 943
 944                                 while ((*c != '\0') && g_ascii_strncasecmp(c, "\">", 2))
 945                                         msg[retcount++] = *c++;
 946
 947                                 if (*c != '\0')
 948                                         c += 2;
 949
 950                                 /* ignore descriptive string */
 951                                 while ((*c != '\0') && g_ascii_strncasecmp(c, "</a>", 4))
 952                                         c++;
 953
 954                                 if (*c != '\0')
 955                                         c += 4;
 956                         }
 957                         else if (!g_ascii_strncasecmp(c + 1, "span", 4))
 958                         {
 959                                 /* Bi-directional text support using CSS properties in span tags */
 960                                 c += 5;
 961
 962                                 while (*c != '\0' && *c != '>')
 963                                 {
 964                                         while (*c == ' ')
 965                                                 c++;
 966                                         if (!g_ascii_strncasecmp(c, "dir=\"rtl\"", 9))
 967                                         {
 968                                                 c += 9;
 969                                                 direction = '1';
 970                                         }
 971                                         else if (!g_ascii_strncasecmp(c, "style=\"", 7))
 972                                         {
 973                                                 /* Parse inline CSS attributes */
 974                                                 int attr_len = 0;
 975                                                 c += 7;
 976                                                 while (*(c + attr_len) != '\0' && *(c + attr_len) != '"')
 977                                                         attr_len++;
 978                                                 if (*(c + attr_len) == '"')
 979                                                 {
 980                                                         char *css_attributes;
 981                                                         char *attr_dir;
 982                                                         css_attributes = g_strndup(c, attr_len);
 983                                                         attr_dir = sipe_backend_markup_css_property(css_attributes, "direction");
 984                                                         g_free(css_attributes);
 985                                                         if (attr_dir && (!g_ascii_strncasecmp(attr_dir, "RTL", 3)))
 986                                                                 direction = '1';
 987                                                         g_free(attr_dir);
 988                                                 }
 989
 990                                         }
 991                                         else
 992                                         {
 993                                                 c++;
 994                                         }
 995                                 }
 996                                 if (*c == '>')
 997                                         c++;
 998                         }
 999                         else if (!g_ascii_strncasecmp(c + 1, "font", 4))
1000                         {
1001                                 c += 5;
1002
1003                                 while ((*c != '\0') && !g_ascii_strncasecmp(c, " ", 1))
1004                                         c++;
1005
1006                                 if (!g_ascii_strncasecmp(c, "color=\"#", 7))
1007                                 {
1008                                         c += 8;
1009
1010                                         fontcolor[0] = *(c + 4);
1011                                         fontcolor[1] = *(c + 5);
1012                                         fontcolor[2] = *(c + 2);
1013                                         fontcolor[3] = *(c + 3);
1014                                         fontcolor[4] = *c;
1015                                         fontcolor[5] = *(c + 1);
1016
1017                                         c += 8;
1018                                 }
1019                                 else if (!g_ascii_strncasecmp(c, "face=\"", 6))
1020                                 {
1021                                         const char *end = NULL;
1022                                         const char *comma = NULL;
1023                                         unsigned int namelen = 0;
1024
1025                                         c += 6;
1026                                         end = strchr(c, '\"');
1027                                         comma = strchr(c, ',');
1028
1029                                         if (comma == NULL || comma > end)
1030                                                 namelen = (unsigned int)(end - c);
1031                                         else
1032                                                 namelen = (unsigned int)(comma - c);
1033
1034                                         g_free(fontface);
1035                                         fontface = g_strndup(c, namelen);
1036                                         c = end + 2;
1037                                 }
1038                                 else
1039                                 {
1040                                         /* Drop all unrecognized/misparsed font tags */
1041                                         while ((*c != '\0') && g_ascii_strncasecmp(c, "\">", 2))
1042                                                 c++;
1043
1044                                         if (*c != '\0')
1045                                                 c += 2;
1046                                 }
1047                         }
1048                         else
1049                         {
1050                                 while ((*c != '\0') && (*c != '>'))
1051                                         c++;
1052                                 if (*c != '\0')
1053                                         c++;
1054                         }
1055                 }
1056                 else if (*c == '&')
1057                 {
1058                         if (!g_ascii_strncasecmp(c, "&lt;", 4))
1059                         {
1060                                 msg[retcount++] = '<';
1061                                 c += 4;
1062                         }
1063                         else if (!g_ascii_strncasecmp(c, "&gt;", 4))
1064                         {
1065                                 msg[retcount++] = '>';
1066                                 c += 4;
1067                         }
1068                         else if (!g_ascii_strncasecmp(c, "&nbsp;", 6))
1069                         {
1070                                 msg[retcount++] = ' ';
1071                                 c += 6;
1072                         }
1073                         else if (!g_ascii_strncasecmp(c, "&quot;", 6))
1074                         {
1075                                 msg[retcount++] = '"';
1076                                 c += 6;
1077                         }
1078                         else if (!g_ascii_strncasecmp(c, "&amp;", 5))
1079                         {
1080                                 msg[retcount++] = '&';
1081                                 c += 5;
1082                         }
1083                         else if (!g_ascii_strncasecmp(c, "&apos;", 6))
1084                         {
1085                                 msg[retcount++] = '\'';
1086                                 c += 6;
1087                         }
1088                         else
1089                                 msg[retcount++] = *c++;
1090                 }
1091                 else
1092                         msg[retcount++] = *c++;
1093         }
1094
1095         if (fontface == NULL)
1096                 fontface = g_strdup("MS Sans Serif");
1097
1098         *attributes = g_strdup_printf("FN=%s; EF=%s; CO=%s; PF=0; RL=%c",
1099                                                                   encode_spaces(fontface),
1100                                                                   fonteffect, fontcolor, direction);
1101         *message = msg;
1102
1103         g_free(fontface);
1104 }
1105 // End of TEMP
1106
1107 /*
1108   Local Variables:
1109   mode: c
1110   c-file-style: "bsd"
1111   indent-tabs-mode: t
1112   tab-width: 8
1113   End:
1114 */