epan/dissectors/packet-xml.c

   1 /* packet-xml.c
   2  * ethereal's xml dissector .
   3  *
   4  * (C) 2005, Luis E. Garcia Ontanon.
   5  *
   6  * $Id$
   7  *
   8  * Refer to the AUTHORS file or the AUTHORS section in the man page
   9  * for contacting the author(s) of this file.
  10  *
  11  * Ethereal - Network traffic analyzer
  12  * By Gerald Combs <gerald@ethereal.com>
  13  * Copyright 1998 Gerald Combs
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
  17  * as published by the Free Software Foundation; either version 2
  18  * of the License, or (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  28  */
  29
  30 #ifdef HAVE_CONFIG_H
  31 #include "config.h"
  32 #endif
  33
  34 #ifdef HAVE_DIRENT_H
  35 #include <dirent.h>
  36 #endif
  37
  38 #include <ctype.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <stdarg.h>
  42 #include <errno.h>
  43
  44 #include <stdio.h>
  45
  46 #include <glib.h>
  47 #include <epan/emem.h>
  48 #include <epan/packet.h>
  49 #include <epan/strutil.h>
  50 #include <epan/tvbparse.h>
  51 #include <epan/dtd.h>
  52 #include <epan/report_err.h>
  53 #include <epan/filesystem.h>
  54
  55 typedef struct _xml_ns_t {
  56     /* the name of this namespace */
  57         gchar* name;
  58
  59     /* its fully qualified name */
  60         gchar* fqn;
  61
  62         /* the contents of the whole element from <> to </> */
  63         int hf_tag;
  64
  65         /* chunks of cdata from <> to </> excluding sub tags */
  66         int hf_cdata;
  67
  68     /* the subtree for its sub items  */
  69         gint ett;
  70
  71         GHashTable* attributes;
  72     /*  key:   the attribute name
  73         value: hf_id of what's between quotes */
  74
  75     /* the namespace's namespaces */
  76     GHashTable* elements;
  77     /*  key:   the element name
  78         value: the child namespace */
  79
  80         GPtrArray* element_names;
  81     /* imported directly from the parser and used while building the namespace */
  82
  83 } xml_ns_t;
  84
  85 typedef struct {
  86         proto_tree* tree;
  87         proto_item* item;
  88         proto_item* last_item;
  89         xml_ns_t* ns;
  90         int start_offset;
  91 } xml_frame_t;
  92
  93 struct _attr_reg_data {
  94         GArray* hf;
  95         gchar* basename;
  96 };
  97
  98
  99 static gint ett_dtd = -1;
 100 static gint ett_xmpli = -1;
 101
 102 static int hf_unknowwn_attrib = -1;
 103 static int hf_comment = -1;
 104 static int hf_xmlpi = -1;
 105 static int hf_dtd_tag = -1;
 106 static int hf_doctype = -1;
 107
 108 /* dissector handles */
 109 static dissector_handle_t xml_handle;
 110
 111 /* parser definitions */
 112 static tvbparse_wanted_t* want;
 113 static tvbparse_wanted_t* want_ignore;
 114
 115 static GHashTable* xmpli_names;
 116 static GHashTable* media_types;
 117
 118 static xml_ns_t xml_ns = {"xml","/",-1,-1,-1,NULL,NULL,NULL};
 119 static xml_ns_t unknown_ns = {"unknown","?",-1,-1,-1,NULL,NULL,NULL};
 120 static xml_ns_t* root_ns;
 121
 122 #define XML_CDATA -1000
 123 #define XML_SCOPED_NAME -1001
 124
 125
 126 GArray* hf_arr;
 127 GArray* ett_arr;
 128
 129 static const gchar* default_media_types[] = {
 130         "text/xml",
 131         "application/xml",
 132         "application/soap+xml",
 133         "application/xml-dtd",
 134         "text/vnd.wap.wml",
 135         "text/vnd.wap.si",
 136         "text/vnd.wap.sl",
 137         "text/vnd.wap.co",
 138         "text/vnd.wap.emn",
 139         "application/vnd.wv.csp+xml",
 140         "application/xcap-el+xml",
 141         "application/xcap-att+xml",
 142         "application/xcap-error+xml",
 143         "application/xcap-caps+xml",
 144         "application/auth-policy+xml",
 145         "application/smil",
 146         "application/cpim-pidf+xml",
 147         "application/rdf+xml",
 148         "application/xslt+xml",
 149         "application/mathml+xml",
 150         "image/svg+xml",
 151         "application/vnd.wv.csp.xml",
 152 };
 153
 154
 155 static void
 156 dissect_xml(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 157 {
 158         tvbparse_t* tt;
 159         tvbparse_elem_t* tok = NULL;
 160         static GPtrArray* stack = NULL;
 161         xml_frame_t* current_frame;
 162
 163         if(!tree) return;
 164
 165         if (stack != NULL)
 166                 g_ptr_array_free(stack,TRUE);
 167
 168         stack = g_ptr_array_new();
 169         current_frame = ep_alloc(sizeof(xml_frame_t));
 170         g_ptr_array_add(stack,current_frame);
 171
 172         tt = tvbparse_init(tvb,0,-1,stack,want_ignore);
 173         current_frame->start_offset = 0;
 174
 175         root_ns = NULL;
 176
 177         if (pinfo->match_string)
 178                 root_ns = g_hash_table_lookup(media_types,pinfo->match_string);
 179
 180         if (! root_ns ) {
 181                 root_ns = &xml_ns;
 182         }
 183
 184         current_frame->ns = root_ns;
 185
 186         current_frame->item = proto_tree_add_item(tree,current_frame->ns->hf_tag,tvb,0,-1,FALSE);
 187         current_frame->tree = proto_item_add_subtree(current_frame->item,current_frame->ns->ett);
 188         current_frame->last_item = current_frame->item;
 189
 190         while(( tok = tvbparse_get(tt, want) )) ;
 191 }
 192
 193
 194 static void after_token(void* tvbparse_data, const void* wanted_data _U_, tvbparse_elem_t* tok) {
 195         GPtrArray* stack = tvbparse_data;
 196         xml_frame_t* current_frame = g_ptr_array_index(stack,stack->len - 1);
 197         int hfid;
 198         proto_item* pi;
 199
 200         if (tok->id == XML_CDATA) {
 201                 hfid = current_frame->ns ? current_frame->ns->hf_cdata : xml_ns.hf_cdata;
 202         } else if ( tok->id > 0) {
 203                 hfid = tok->id;
 204         } else {
 205                 hfid = xml_ns.hf_cdata;
 206         }
 207
 208         pi = proto_tree_add_item(current_frame->tree, hfid, tok->tvb, tok->offset, tok->len, FALSE);
 209
 210         proto_item_set_text(pi, "%s",
 211                                                 tvb_format_text(tok->tvb,tok->offset,tok->len));
 212 }
 213
 214 static void before_xmpli(void* tvbparse_data, const void* wanted_data _U_, tvbparse_elem_t* tok) {
 215         GPtrArray* stack = tvbparse_data;
 216         xml_frame_t* current_frame = g_ptr_array_index(stack,stack->len - 1);
 217         proto_item* pi;
 218         proto_tree* pt;
 219         tvbparse_elem_t* name_tok = tok->sub->next;
 220         gchar* name = tvb_get_ephemeral_string(name_tok->tvb,name_tok->offset,name_tok->len);
 221         xml_ns_t* ns = g_hash_table_lookup(xmpli_names,name);
 222
 223         int hf_tag;
 224         gint ett;
 225
 226         g_strdown(name);
 227         if (!ns) {
 228                 hf_tag = hf_xmlpi;
 229                 ett = ett_xmpli;
 230         } else {
 231                 hf_tag = ns->hf_tag;
 232                 ett = ns->ett;
 233         }
 234
 235         pi = proto_tree_add_item(current_frame->tree,hf_tag,tok->tvb,tok->offset,tok->len,FALSE);
 236
 237         proto_item_set_text(pi,tvb_format_text(tok->tvb,tok->offset,(name_tok->offset - tok->offset) + name_tok->len));
 238
 239         pt = proto_item_add_subtree(pi,ett);
 240
 241         current_frame = ep_alloc(sizeof(xml_frame_t));
 242         current_frame->item = pi;
 243         current_frame->last_item = pi;
 244         current_frame->tree = pt;
 245         current_frame->start_offset = tok->offset;
 246         current_frame->ns = ns;
 247
 248         g_ptr_array_add(stack,current_frame);
 249
 250 }
 251
 252 static void after_xmlpi(void* tvbparse_data, const void* wanted_data _U_, tvbparse_elem_t* tok) {
 253         GPtrArray* stack = tvbparse_data;
 254         xml_frame_t* current_frame = g_ptr_array_index(stack,stack->len - 1);
 255
 256         proto_tree_add_text(current_frame->tree,
 257                                                    tok->tvb, tok->offset, tok->len,
 258                                                    tvb_format_text(tok->tvb,tok->offset,tok->len));
 259
 260         if (stack->len > 1) {
 261                 g_ptr_array_remove_index_fast(stack,stack->len - 1);
 262         } else {
 263                 proto_tree_add_text(current_frame->tree,tok->tvb,tok->offset,tok->len,"[ ERROR: Closing an unopened xmpli tag ]");
 264         }
 265 }
 266
 267 static void before_tag(void* tvbparse_data, const void* wanted_data _U_, tvbparse_elem_t* tok) {
 268         GPtrArray* stack = tvbparse_data;
 269         xml_frame_t* current_frame = g_ptr_array_index(stack,stack->len - 1);
 270         tvbparse_elem_t* name_tok = tok->sub->next;
 271     gchar* root_name;
 272         gchar* name;
 273         xml_ns_t* ns;
 274         xml_frame_t* new_frame;
 275         proto_item* pi;
 276         proto_tree* pt;
 277
 278         if (name_tok->sub->id == XML_SCOPED_NAME) {
 279         tvbparse_elem_t* root_tok = name_tok->sub->sub;
 280         tvbparse_elem_t* leaf_tok = name_tok->sub->sub->next->next;
 281         xml_ns_t* nameroot_ns;
 282
 283         root_name = tvb_get_ephemeral_string(root_tok->tvb,root_tok->offset,root_tok->len);
 284         name = tvb_get_ephemeral_string(leaf_tok->tvb,leaf_tok->offset,leaf_tok->len);
 285
 286         nameroot_ns = g_hash_table_lookup(xml_ns.elements,root_name);
 287
 288         if(nameroot_ns) {
 289             ns = g_hash_table_lookup(nameroot_ns->elements,name);
 290             if (!ns) {
 291                 ns = &unknown_ns;
 292             }
 293         } else {
 294             ns = &unknown_ns;
 295         }
 296
 297     } else {
 298         name = tvb_get_ephemeral_string(name_tok->tvb,name_tok->offset,name_tok->len);
 299         g_strdown(name);
 300
 301         if(current_frame->ns) {
 302                         ns = g_hash_table_lookup(current_frame->ns->elements,name);
 303
 304                         if (!ns) {
 305                                 if (! ( ns = g_hash_table_lookup(root_ns->elements,name) ) ) {
 306                                         ns = &unknown_ns;
 307                                 }
 308                         }
 309                 } else {
 310                         ns = &unknown_ns;
 311                 }
 312     }
 313
 314     pi = proto_tree_add_item(current_frame->tree,ns->hf_tag,tok->tvb,tok->offset,tok->len,FALSE);
 315         proto_item_set_text(pi,tvb_format_text(tok->tvb,tok->offset,(name_tok->offset - tok->offset) + name_tok->len));
 316
 317         pt = proto_item_add_subtree(pi,ns->ett);
 318
 319         new_frame = ep_alloc(sizeof(xml_frame_t));
 320         new_frame->item = pi;
 321         new_frame->last_item = pi;
 322         new_frame->tree = pt;
 323         new_frame->start_offset = tok->offset;
 324         new_frame->ns = ns;
 325
 326         g_ptr_array_add(stack,new_frame);
 327
 328 }
 329
 330 static void after_open_tag(void* tvbparse_data, const void* wanted_data _U_, tvbparse_elem_t* tok _U_) {
 331         GPtrArray* stack = tvbparse_data;
 332         xml_frame_t* current_frame = g_ptr_array_index(stack,stack->len - 1);
 333
 334         proto_item_append_text(current_frame->last_item,">");
 335 }
 336
 337 static void after_closed_tag(void* tvbparse_data, const void* wanted_data _U_, tvbparse_elem_t* tok) {
 338         GPtrArray* stack = tvbparse_data;
 339         xml_frame_t* current_frame = g_ptr_array_index(stack,stack->len - 1);
 340
 341         proto_item_append_text(current_frame->last_item,"/>");
 342
 343         if (stack->len > 1) {
 344                 g_ptr_array_remove_index_fast(stack,stack->len - 1);
 345         } else {
 346                 proto_tree_add_text(current_frame->tree,tok->tvb,tok->offset,tok->len,"[ ERROR: Closing an unopened tag ]");
 347         }
 348 }
 349
 350 void after_untag(void* tvbparse_data, const void* wanted_data _U_, tvbparse_elem_t* tok){
 351         GPtrArray* stack = tvbparse_data;
 352         xml_frame_t* current_frame = g_ptr_array_index(stack,stack->len - 1);
 353
 354         proto_item_set_len(current_frame->item, (tok->offset - current_frame->start_offset) + tok->len);
 355
 356         proto_tree_add_text(current_frame->tree,tok->tvb,tok->offset,tok->len,"%s",
 357                                                 tvb_format_text(tok->tvb,tok->offset,tok->len));
 358
 359         if (stack->len > 1) {
 360                 g_ptr_array_remove_index_fast(stack,stack->len - 1);
 361         } else {
 362                 proto_tree_add_text(current_frame->tree,tok->tvb,tok->offset,tok->len,
 363                                                         "[ ERROR: Closing an unopened tag ]");
 364         }
 365 }
 366
 367 static void before_dtd_doctype(void* tvbparse_data, const void* wanted_data _U_, tvbparse_elem_t* tok){
 368         GPtrArray* stack = tvbparse_data;
 369         xml_frame_t* current_frame = g_ptr_array_index(stack,stack->len - 1);
 370         tvbparse_elem_t* name_tok = tok->sub->next->next->next->sub->sub;
 371         proto_tree* dtd_item = proto_tree_add_item(current_frame->tree, hf_doctype,
 372                                                                                            name_tok->tvb, name_tok->offset, name_tok->len, FALSE);
 373
 374         proto_item_set_text(dtd_item,"%s",tvb_format_text(tok->tvb,tok->offset,tok->len));
 375
 376         current_frame = ep_alloc(sizeof(xml_frame_t));
 377         current_frame->item = dtd_item;
 378         current_frame->last_item = dtd_item;
 379         current_frame->tree = proto_item_add_subtree(dtd_item,ett_dtd);
 380         current_frame->start_offset = tok->offset;
 381         current_frame->ns = NULL;
 382
 383         g_ptr_array_add(stack,current_frame);
 384 }
 385
 386 static void pop_stack(void* tvbparse_data, const void* wanted_data _U_, tvbparse_elem_t* tok _U_) {
 387         GPtrArray* stack = tvbparse_data;
 388         xml_frame_t* current_frame = g_ptr_array_index(stack,stack->len - 1);
 389
 390         if (stack->len > 1) {
 391                 g_ptr_array_remove_index_fast(stack,stack->len - 1);
 392         } else {
 393                 proto_tree_add_text(current_frame->tree,tok->tvb,tok->offset,tok->len,
 394                                                         "[ ERROR: Closing an unopened tag ]");
 395         }
 396 }
 397
 398 static void after_dtd_close(void* tvbparse_data, const void* wanted_data _U_, tvbparse_elem_t* tok){
 399         GPtrArray* stack = tvbparse_data;
 400         xml_frame_t* current_frame = g_ptr_array_index(stack,stack->len - 1);
 401
 402         proto_tree_add_text(current_frame->tree,tok->tvb,tok->offset,tok->len,"%s",
 403                                                 tvb_format_text(tok->tvb,tok->offset,tok->len));
 404         if (stack->len > 1) {
 405                 g_ptr_array_remove_index_fast(stack,stack->len - 1);
 406         } else {
 407                 proto_tree_add_text(current_frame->tree,tok->tvb,tok->offset,tok->len,"[ ERROR: Closing an unopened tag ]");
 408         }
 409 }
 410
 411 static void get_attrib_value(void* tvbparse_data _U_, const void* wanted_data _U_, tvbparse_elem_t* tok) {
 412         tok->data = tok->sub;
 413 }
 414
 415 static void after_attrib(void* tvbparse_data, const void* wanted_data _U_, tvbparse_elem_t* tok) {
 416         GPtrArray* stack = tvbparse_data;
 417         xml_frame_t* current_frame = g_ptr_array_index(stack,stack->len - 1);
 418         gchar* name = tvb_get_ephemeral_string(tok->sub->tvb,tok->sub->offset,tok->sub->len);
 419         tvbparse_elem_t* value = tok->sub->next->next->data;
 420         int* hfidp;
 421         int hfid;
 422
 423         g_strdown(name);
 424         if(current_frame->ns && (hfidp = g_hash_table_lookup(current_frame->ns->attributes,name) )) {
 425                 hfid = *hfidp;
 426         } else {
 427                 hfid = hf_unknowwn_attrib;
 428                 value = tok;
 429         }
 430
 431         current_frame->last_item = proto_tree_add_item(current_frame->tree,hfid,value->tvb,value->offset,value->len,FALSE);
 432         proto_item_set_text(current_frame->last_item, "%s", tvb_format_text(tok->tvb,tok->offset,tok->len));
 433
 434 }
 435
 436 static void unrecognized_token(void* tvbparse_data, const void* wanted_data _U_, tvbparse_elem_t* tok _U_){
 437         GPtrArray* stack = tvbparse_data;
 438         xml_frame_t* current_frame = g_ptr_array_index(stack,stack->len - 1);
 439
 440         proto_tree_add_text(current_frame->tree,tok->tvb,tok->offset,tok->len,"[ ERROR: Unrecognized text ]");
 441
 442 }
 443
 444
 445
 446 void init_xml_parser(void) {
 447         tvbparse_wanted_t* want_name = tvbparse_chars(-1,1,0,"abcdefghijklmnopqrstuvwxyz-_ABCDEFGHIJKLMNOPQRSTUVWXYZ",NULL,NULL,NULL);
 448         tvbparse_wanted_t* want_attr_name = tvbparse_chars(-1,1,0,"abcdefghijklmnopqrstuvwxyz-_ABCDEFGHIJKLMNOPQRSTUVWXYZ:",NULL,NULL,NULL);
 449
 450     tvbparse_wanted_t* want_scoped_name = tvbparse_set_seq(XML_SCOPED_NAME, NULL, NULL, NULL,
 451                                                            want_name,
 452                                                            tvbparse_char(-1,":",NULL,NULL,NULL),
 453                                                            want_name,
 454                                                            NULL);
 455
 456     tvbparse_wanted_t* want_tag_name = tvbparse_set_oneof(0, NULL, NULL, NULL,
 457                                                           want_scoped_name,
 458                                                           want_name,
 459                                                           NULL);
 460
 461     tvbparse_wanted_t* want_attrib_value = tvbparse_set_oneof(0, NULL, NULL, get_attrib_value,
 462                                                               tvbparse_quoted(-1, NULL, NULL, tvbparse_shrink_token_cb,'\"','\\'),
 463                                                               tvbparse_quoted(-1, NULL, NULL, tvbparse_shrink_token_cb,'\'','\\'),
 464                                                               tvbparse_chars(-1,1,0,"0123456789",NULL,NULL,NULL),
 465                                                               want_name,
 466                                                               NULL);
 467
 468         tvbparse_wanted_t* want_attributes = tvbparse_one_or_more(-1, NULL, NULL, NULL,
 469                                                                                                                           tvbparse_set_seq(-1, NULL, NULL, after_attrib,
 470                                                                                want_attr_name,
 471                                                                                                                                                            tvbparse_char(-1,"=",NULL,NULL,NULL),
 472                                                                                                                                                            want_attrib_value,
 473                                                                                                                                                            NULL));
 474
 475         tvbparse_wanted_t* want_stoptag = tvbparse_set_oneof(-1,NULL,NULL,NULL,
 476                                                                                                                  tvbparse_char(-1, ">", NULL, NULL, after_open_tag),
 477                                                                                                                  tvbparse_string(-1, "/>", NULL, NULL, after_closed_tag),
 478                                                                                                                  NULL);
 479
 480         tvbparse_wanted_t* want_stopxmlpi = tvbparse_string(-1,"?>",NULL,NULL,after_xmlpi);
 481
 482     tvbparse_wanted_t* want_comment = tvbparse_set_seq(hf_comment,NULL,NULL,after_token,
 483                                                        tvbparse_string(-1,"<!--",NULL,NULL,NULL),
 484                                                        tvbparse_until(-1,NULL,NULL,NULL,
 485                                                                       tvbparse_string(-1,"-->",NULL,NULL,NULL),
 486                                                                       TP_UNTIL_INCLUDE),
 487                                                        NULL);
 488
 489     tvbparse_wanted_t* want_xmlpi = tvbparse_set_seq(hf_xmlpi,NULL,before_xmpli,NULL,
 490                                                      tvbparse_string(-1,"<?",NULL,NULL,NULL),
 491                                                      want_name,
 492                                                      tvbparse_set_oneof(-1,NULL,NULL,NULL,
 493                                                                         want_stopxmlpi,
 494                                                                         tvbparse_set_seq(-1,NULL,NULL,NULL,
 495                                                                                          want_attributes,
 496                                                                                          want_stopxmlpi,
 497                                                                                          NULL),
 498                                                                         NULL),
 499                                                      NULL);
 500
 501     tvbparse_wanted_t* want_closing_tag = tvbparse_set_seq(0,NULL,NULL,after_untag,
 502                                                            tvbparse_char(-1, "<", NULL, NULL, NULL),
 503                                                            tvbparse_char(-1, "/", NULL, NULL, NULL),
 504                                                            want_tag_name,
 505                                                            tvbparse_char(-1, ">", NULL, NULL, NULL),
 506                                                            NULL);
 507
 508     tvbparse_wanted_t* want_doctype_start = tvbparse_set_seq(-1,NULL,before_dtd_doctype,NULL,
 509                                                              tvbparse_char(-1,"<",NULL,NULL,NULL),
 510                                                              tvbparse_char(-1,"!",NULL,NULL,NULL),
 511                                                              tvbparse_casestring(-1,"DOCTYPE",NULL,NULL,NULL),
 512                                                              tvbparse_set_oneof(-1,NULL,NULL,NULL,
 513                                                                                 tvbparse_set_seq(-1,NULL,NULL,NULL,
 514                                                                                                  want_name,
 515                                                                                                  tvbparse_char(-1,"[",NULL,NULL,NULL),
 516                                                                                                  NULL),
 517                                                                                 tvbparse_set_seq(-1,NULL,NULL,pop_stack,
 518                                                                                                  want_name,
 519                                                                                                  tvbparse_set_oneof(-1,NULL,NULL,NULL,
 520                                                                                                                     tvbparse_casestring(-1,"PUBLIC",NULL,NULL,NULL),
 521                                                                                                                     tvbparse_casestring(-1,"SYSTEM",NULL,NULL,NULL),
 522                                                                                                                     NULL),
 523                                                                                                  tvbparse_until(-1,NULL,NULL,NULL,
 524                                                                                                                 tvbparse_char(-1,">",NULL,NULL,NULL),
 525                                                                                                                 TP_UNTIL_INCLUDE),
 526                                                                                                  NULL),
 527                                                                                 NULL),
 528                                                              NULL);
 529
 530     tvbparse_wanted_t* want_dtd_tag = tvbparse_set_seq(hf_dtd_tag,NULL,NULL,after_token,
 531                                                        tvbparse_char(-1,"<",NULL,NULL,NULL),
 532                                                        tvbparse_char(-1,"!",NULL,NULL,NULL),
 533                                                        tvbparse_until(-1,NULL,NULL,NULL,
 534                                                                       tvbparse_char(-1, ">", NULL, NULL, NULL),
 535                                                                       TP_UNTIL_INCLUDE),
 536                                                        NULL);
 537
 538     tvbparse_wanted_t* want_tag = tvbparse_set_seq(-1, NULL, before_tag, NULL,
 539                                                    tvbparse_char(-1,"<",NULL,NULL,NULL),
 540                                                    want_tag_name,
 541                                                    tvbparse_set_oneof(-1,NULL,NULL,NULL,
 542                                                                       tvbparse_set_seq(-1,NULL,NULL,NULL,
 543                                                                                        want_attributes,
 544                                                                                        want_stoptag,
 545                                                                                        NULL),
 546                                                                       want_stoptag,
 547                                                                       NULL),
 548                                                    NULL);
 549
 550     tvbparse_wanted_t* want_dtd_close = tvbparse_set_seq(-1,NULL,NULL,after_dtd_close,
 551                                                          tvbparse_char(-1,"]",NULL,NULL,NULL),
 552                                                          tvbparse_char(-1,">",NULL,NULL,NULL),
 553                                                          NULL);
 554
 555     want_ignore = tvbparse_chars(-1,1,0," \t\r\n",NULL,NULL,NULL);
 556
 557
 558         want = tvbparse_set_oneof(-1, NULL, NULL, NULL,
 559                                                           want_comment,
 560                                                           want_xmlpi,
 561                                                           want_closing_tag,
 562                                                           want_doctype_start,
 563                                                           want_dtd_close,
 564                                                           want_dtd_tag,
 565                                                           want_tag,
 566                                                           tvbparse_not_chars(XML_CDATA,1,0,"<",NULL,NULL,after_token),
 567                                                           tvbparse_not_chars(-1,1,0," \t\r\n",NULL,NULL,unrecognized_token),
 568                                                           NULL);
 569
 570
 571 }
 572
 573
 574 xml_ns_t* xml_new_namespace(GHashTable* hash, gchar* name, ...) {
 575         xml_ns_t* ns = g_malloc(sizeof(xml_ns_t));
 576         va_list ap;
 577         gchar* attr_name;
 578
 579         ns->name = g_strdup(name);
 580         ns->hf_tag = -1;
 581         ns->hf_cdata = -1;
 582         ns->ett = -1;
 583         ns->attributes = g_hash_table_new(g_str_hash,g_str_equal);
 584         ns->elements = g_hash_table_new(g_str_hash,g_str_equal);
 585
 586         va_start(ap,name);
 587
 588         while(( attr_name = va_arg(ap,gchar*) )) {
 589                 int* hfp = g_malloc(sizeof(int));
 590                 *hfp = -1;
 591                 g_hash_table_insert(ns->attributes,g_strdup(attr_name),hfp);
 592         };
 593
 594         va_end(ap);
 595
 596         g_hash_table_insert(hash,ns->name,ns);
 597
 598         return ns;
 599 }
 600
 601
 602 void add_xml_field(GArray* hfs, int* p_id, gchar* name, gchar* fqn) {
 603         hf_register_info hfri;
 604
 605         hfri.p_id = p_id;
 606         hfri.hfinfo.name = name;
 607         hfri.hfinfo.abbrev = fqn;
 608         hfri.hfinfo.type = FT_STRING;
 609         hfri.hfinfo.display = BASE_NONE;
 610         hfri.hfinfo.strings = NULL;
 611         hfri.hfinfo.bitmask = 0x0;
 612         hfri.hfinfo.blurb = "";
 613         hfri.hfinfo.id = 0;
 614         hfri.hfinfo.parent = 0;
 615         hfri.hfinfo.ref_count = 0;
 616         hfri.hfinfo.bitshift = 0;
 617         hfri.hfinfo.same_name_next = NULL;
 618         hfri.hfinfo.same_name_prev = NULL;
 619
 620         g_array_append_val(hfs,hfri);
 621 }
 622
 623 void add_xml_attribute_names(gpointer k, gpointer v, gpointer p) {
 624         struct _attr_reg_data* d = p;
 625         gchar* basename = g_strdup_printf("%s.%s",d->basename,(gchar*)k);
 626         add_xml_field(d->hf, (int*) v, (gchar*)k, basename);
 627 }
 628
 629
 630 void add_xmlpi_namespace(gpointer k _U_, gpointer v, gpointer p) {
 631         xml_ns_t* ns = v;
 632         gchar* basename = g_strdup_printf("%s.%s",(gchar*)p,ns->name);
 633         gint* ett_p = &(ns->ett);
 634         struct _attr_reg_data d;
 635
 636         add_xml_field(hf_arr, &(ns->hf_tag), basename, basename);
 637
 638         g_array_append_val(ett_arr,ett_p);
 639
 640         d.basename = basename;
 641         d.hf = hf_arr;
 642
 643         g_hash_table_foreach(ns->attributes,add_xml_attribute_names,&d);
 644
 645 }
 646
 647 static void destroy_dtd_data(dtd_build_data_t* dtd_data) {
 648
 649         if(dtd_data->proto_name) g_free(dtd_data->proto_name);
 650         if(dtd_data->media_type) g_free(dtd_data->media_type);
 651         if(dtd_data->description) g_free(dtd_data->description);
 652         if(dtd_data->proto_root) g_free(dtd_data->proto_root);
 653
 654     g_string_free(dtd_data->error,TRUE);
 655
 656
 657         while(dtd_data->elements->len) {
 658                 dtd_named_list_t* nl = g_ptr_array_remove_index_fast(dtd_data->elements,0);
 659                 g_ptr_array_free(nl->list,TRUE);
 660                 g_free(nl);
 661         }
 662
 663         g_ptr_array_free(dtd_data->elements,TRUE);
 664
 665         while(dtd_data->attributes->len) {
 666                 dtd_named_list_t* nl = g_ptr_array_remove_index_fast(dtd_data->elements,0);
 667                 g_ptr_array_free(nl->list,TRUE);
 668                 g_free(nl);
 669         }
 670
 671         g_ptr_array_free(dtd_data->attributes,TRUE);
 672
 673         g_free(dtd_data);
 674
 675 }
 676
 677
 678 static void copy_attrib_item(gpointer k, gpointer v _U_, gpointer p) {
 679         gchar* key = g_strdup(k);
 680         int* value = g_malloc(sizeof(int));
 681         GHashTable* dst = p;
 682
 683         *value = -1;
 684         g_hash_table_insert(dst,key,value);
 685
 686 }
 687
 688 static GHashTable* copy_attributes_hash(GHashTable* src) {
 689         GHashTable* dst = g_hash_table_new(g_str_hash,g_str_equal);
 690
 691         g_hash_table_foreach(src,copy_attrib_item,dst);
 692
 693         return dst;
 694 }
 695
 696 static xml_ns_t* duplicate_element(xml_ns_t* orig) {
 697         xml_ns_t* new_item  = g_malloc(sizeof(xml_ns_t));
 698         guint i;
 699
 700         new_item->name = g_strdup(orig->name);
 701         new_item->hf_tag = -1;
 702         new_item->hf_cdata = -1;
 703         new_item->ett = -1;
 704         new_item->attributes = copy_attributes_hash(orig->attributes);
 705         new_item->elements =  g_hash_table_new(g_str_hash,g_str_equal);
 706         new_item->element_names = g_ptr_array_new();
 707
 708         for(i=0; i < orig->element_names->len; i++) {
 709                 g_ptr_array_add(new_item->element_names,
 710                                                    g_ptr_array_index(orig->element_names,i));
 711         }
 712
 713         return new_item;
 714 }
 715
 716 static gchar* fully_qualified_name(GPtrArray* hier, gchar* name) {
 717         guint i;
 718         GString* s = g_string_new("");
 719         gchar* str;
 720
 721         for (i = 0; i < hier->len; i++) {
 722                 g_string_sprintfa(s, "%s.",(gchar*)g_ptr_array_index(hier,i));
 723         }
 724
 725         g_string_append(s,name);
 726         str = s->str;
 727         g_string_free(s,FALSE);
 728
 729         return str;
 730 }
 731
 732
 733 static xml_ns_t* make_xml_hier(gchar* elem_name,
 734                                                                   xml_ns_t* root,
 735                                                                   GHashTable* elements,
 736                                                                   GPtrArray* hier,
 737                                                                   GString* error,
 738                                                                   GArray* hfs,
 739                                                                   GArray* etts) {
 740         xml_ns_t* new;
 741         xml_ns_t* orig;
 742         gchar* fqn;
 743         gint* ett_p;
 744         struct _attr_reg_data d;
 745     gboolean recurred = FALSE;
 746     guint i;
 747
 748     if ( g_str_equal(elem_name,root->name) ) {
 749         return NULL;
 750     }
 751
 752         if (! ( orig = g_hash_table_lookup(elements,elem_name) )) {
 753                 g_string_sprintfa(error,"element '%s' is not defined\n", elem_name);
 754                 return NULL;
 755         }
 756
 757     for (i = 0; i < hier->len; i++) {
 758         if( strcmp(elem_name,(gchar*) g_ptr_array_index(hier,i) ) == 0 ) {
 759             recurred = TRUE;
 760         }
 761     }
 762
 763     if (recurred) {
 764         return NULL;
 765     }
 766
 767         fqn = fully_qualified_name(hier,elem_name);
 768
 769         new = duplicate_element(orig);
 770         new->fqn = fqn;
 771
 772     add_xml_field(hfs, &(new->hf_tag), g_strdup(elem_name), fqn);
 773         add_xml_field(hfs, &(new->hf_cdata), g_strdup(elem_name), fqn);
 774
 775         ett_p = &new->ett;
 776         g_array_append_val(etts,ett_p);
 777
 778         d.basename = fqn;
 779         d.hf = hfs;
 780
 781         g_hash_table_foreach(new->attributes,add_xml_attribute_names,&d);
 782
 783         while(new->element_names->len) {
 784                 gchar* child_name = g_ptr_array_remove_index(new->element_names,0);
 785                 xml_ns_t* child_element = NULL;
 786
 787         g_ptr_array_add(hier,elem_name);
 788         child_element = make_xml_hier(child_name, root, elements, hier,error,hfs,etts);
 789         g_ptr_array_remove_index_fast(hier,hier->len - 1);
 790
 791                 if (child_element) {
 792                         g_hash_table_insert(new->elements,child_element->name,child_element);
 793                 }
 794     }
 795
 796         g_ptr_array_free(new->element_names,TRUE);
 797         new->element_names = NULL;
 798         return new;
 799 }
 800
 801 static gboolean free_both(gpointer k, gpointer v, gpointer p _U_) {
 802     g_free(k);
 803     g_free(v);
 804     return TRUE;
 805 }
 806
 807 static gboolean free_elements(gpointer k _U_, gpointer v, gpointer p _U_) {
 808     xml_ns_t* e = v;
 809     g_free(e->name);
 810     g_hash_table_foreach_remove(e->attributes,free_both,NULL);
 811     g_hash_table_destroy(e->attributes);
 812     g_hash_table_destroy(e->elements);
 813
 814     while (e->element_names->len) {
 815         g_free(g_ptr_array_remove_index(e->element_names,0));
 816     }
 817
 818     g_ptr_array_free(e->element_names,TRUE);
 819     g_free(e);
 820
 821     return TRUE;
 822 }
 823
 824 static void register_dtd(dtd_build_data_t* dtd_data, GString* errors) {
 825         GHashTable* elements = g_hash_table_new(g_str_hash,g_str_equal);
 826         gchar* root_name = NULL;
 827         xml_ns_t* root_element = NULL;
 828         GArray* hfs;
 829         GArray* etts;
 830         GPtrArray* hier;
 831         gchar* curr_name;
 832     GPtrArray* element_names = g_ptr_array_new();
 833
 834     /* we first populate elements with the those coming from the parser */
 835         while(dtd_data->elements->len) {
 836                 dtd_named_list_t* nl = g_ptr_array_remove_index(dtd_data->elements,0);
 837                 xml_ns_t* element = g_malloc(sizeof(xml_ns_t));
 838
 839                 /* we will use the first element found as root in case no other one was given. */
 840                 if (root_name == NULL)
 841             root_name = g_strdup(nl->name);
 842
 843                 element->name = nl->name;
 844                 element->element_names = nl->list;
 845                 element->hf_tag = -1;
 846                 element->hf_cdata = -1;
 847                 element->ett = -1;
 848                 element->attributes = g_hash_table_new(g_str_hash,g_str_equal);
 849                 element->elements = g_hash_table_new(g_str_hash,g_str_equal);
 850
 851         if( g_hash_table_lookup(elements,element->name) ) {
 852             g_string_sprintfa(errors,"element %s defined more than once\n", element->name);
 853             free_elements(NULL,element,NULL);
 854         } else {
 855             g_hash_table_insert(elements,element->name,element);
 856             g_ptr_array_add(element_names,g_strdup(element->name));
 857                 }
 858
 859                 g_free(nl);
 860         }
 861
 862         /* then we add the attributes to its relative elements */
 863         while(dtd_data->attributes->len) {
 864                 dtd_named_list_t* nl = g_ptr_array_remove_index(dtd_data->attributes,0);
 865                 xml_ns_t* element = g_hash_table_lookup(elements,nl->name);
 866
 867                 if (!element) {
 868                         g_string_sprintfa(errors,"element %s is not defined\n", nl->name);
 869
 870             goto next_attribute;
 871                 }
 872
 873                 while(nl->list->len) {
 874                         gchar* name = g_ptr_array_remove_index(nl->list,0);
 875                         int* id_p = g_malloc(sizeof(int));
 876
 877                         *id_p = -1;
 878                         g_hash_table_insert(element->attributes,name,id_p);
 879                 }
 880
 881 next_attribute:
 882                 g_free(nl->name);
 883                 g_ptr_array_free(nl->list,TRUE);
 884                 g_free(nl);
 885         }
 886
 887     /* if a proto_root is defined in the dtd we'll use that as root */
 888         if( dtd_data->proto_root ) {
 889         if(root_name)
 890             g_free(root_name);
 891         root_name = g_strdup(dtd_data->proto_root);
 892         }
 893
 894     /* we use a stack with the names to avoid recurring infinitelly */
 895         hier = g_ptr_array_new();
 896
 897     /*
 898      * if a proto name was given in the dtd the dtd will be used as a protocol
 899      * or else the dtd will be loaded as a branch of the xml namespace
 900      */
 901         if( ! dtd_data->proto_name ) {
 902                 hfs = hf_arr;
 903                 etts = ett_arr;
 904                 g_ptr_array_add(hier,g_strdup("xml"));
 905                 root_element = &xml_ns;
 906         } else {
 907         /*
 908          * if we were given a proto_name the namespace will be registered
 909          * as an indipendent protocol with its own hf and ett arrays.
 910          */
 911             hfs = g_array_new(FALSE,FALSE,sizeof(hf_register_info));
 912             etts = g_array_new(FALSE,FALSE,sizeof(gint*));
 913         }
 914
 915     /* the root element of the dtd's namespace */
 916         root_element = g_malloc(sizeof(xml_ns_t));
 917     root_element->name = g_strdup(root_name);
 918     root_element->fqn = root_element->name;
 919     root_element->hf_tag = -1;
 920     root_element->hf_cdata = -1;
 921     root_element->ett = -1;
 922     root_element->elements = g_hash_table_new(g_str_hash,g_str_equal);
 923     root_element->element_names = element_names;
 924
 925     /*
 926      * we can either create a namespace as a flat namespace
 927      * in which all the elements are at the root level
 928      * or we can create a recursive namespace
 929      */
 930     if (dtd_data->recursion) {
 931         xml_ns_t* orig_root;
 932
 933         make_xml_hier(root_name, root_element, elements,hier,errors,hfs,etts);
 934
 935         g_hash_table_insert(root_element->elements,root_element->name,root_element);
 936
 937         orig_root = g_hash_table_lookup(elements,root_name);
 938
 939         /* if the root element was defined copy its attrlist to the child */
 940         if(orig_root) {
 941             struct _attr_reg_data d;
 942
 943             d.basename = root_name;
 944             d.hf = hfs;
 945
 946             root_element->attributes = copy_attributes_hash(orig_root->attributes);
 947             g_hash_table_foreach(root_element->attributes,add_xml_attribute_names,&d);
 948         } else {
 949             root_element->attributes = g_hash_table_new(g_str_hash,g_str_equal);
 950         }
 951
 952         /* we then create all the sub hierachies to catch the recurred cases */
 953         g_ptr_array_add(hier,root_name);
 954
 955         while(root_element->element_names->len) {
 956             curr_name = g_ptr_array_remove_index(root_element->element_names,0);
 957
 958             if( ! g_hash_table_lookup(root_element->elements,curr_name) ) {
 959                 xml_ns_t* new = make_xml_hier(curr_name, root_element, elements,hier,errors,hfs,etts);
 960                 g_hash_table_insert(root_element->elements,new->name,new);
 961             }
 962
 963             g_free(curr_name);
 964         }
 965
 966     } else {
 967         /* a flat namespace */
 968         g_ptr_array_add(hier,root_name);
 969
 970         root_element->attributes = g_hash_table_new(g_str_hash,g_str_equal);
 971
 972         while(root_element->element_names->len) {
 973             xml_ns_t* new;
 974             gint* ett_p;
 975             struct _attr_reg_data d;
 976
 977             curr_name = g_ptr_array_remove_index(root_element->element_names,0);
 978             new = duplicate_element(g_hash_table_lookup(elements,curr_name));
 979             new->fqn = fully_qualified_name(hier, curr_name);
 980
 981             add_xml_field(hfs, &(new->hf_tag), curr_name, new->fqn);
 982             add_xml_field(hfs, &(new->hf_cdata), curr_name, new->fqn);
 983
 984             d.basename = new->fqn;
 985             d.hf = hfs;
 986
 987             g_hash_table_foreach(new->attributes,add_xml_attribute_names,&d);
 988
 989             ett_p = &new->ett;
 990             g_array_append_val(etts,ett_p);
 991
 992             g_ptr_array_free(new->element_names,TRUE);
 993
 994             g_hash_table_insert(root_element->elements,new->name,new);
 995         }
 996     }
 997
 998     g_ptr_array_free(element_names,TRUE);
 999
1000         g_ptr_array_free(hier,TRUE);
1001
1002     /*
1003      * if we were given a proto_name the namespace will be registered
1004      * as an indipendent protocol.
1005      */
1006         if( dtd_data->proto_name ) {
1007         gint* ett_p;
1008
1009                 if ( ! dtd_data->description) {
1010                         dtd_data->description = g_strdup(root_name);
1011                 }
1012
1013         ett_p = &root_element->ett;
1014         g_array_append_val(etts,ett_p);
1015
1016         add_xml_field(hfs, &root_element->hf_cdata, root_element->name, root_element->fqn);
1017
1018                 root_element->hf_tag = proto_register_protocol(dtd_data->description, dtd_data->proto_name, root_element->name);
1019                 proto_register_field_array(root_element->hf_tag, (hf_register_info*)hfs->data, hfs->len);
1020                 proto_register_subtree_array((gint**)etts->data, etts->len);
1021
1022                 if (dtd_data->media_type) {
1023                         g_hash_table_insert(media_types,dtd_data->media_type,root_element);
1024                         dtd_data->media_type = NULL;
1025                 }
1026
1027                 dtd_data->description = NULL;
1028                 dtd_data->proto_name = NULL;
1029                 g_array_free(hfs,FALSE);
1030                 g_array_free(etts,TRUE);
1031         }
1032
1033     g_hash_table_insert(xml_ns.elements,root_element->name,root_element);
1034
1035     g_hash_table_foreach_remove(elements,free_elements,NULL);
1036     g_hash_table_destroy(elements);
1037
1038         destroy_dtd_data(dtd_data);
1039
1040     if (root_name)
1041         g_free(root_name);
1042 }
1043
1044 #if GLIB_MAJOR_VERSION < 2
1045 #  define DIRECTORY_T DIR
1046 #  define FILE_T struct dirent
1047 #  define OPENDIR_OP(name) opendir(name)
1048 #  define DIRGETNEXT_OP(dir) readdir(dir)
1049 #  define GETFNAME_OP(file) (gchar *)file->d_name
1050 #  define CLOSEDIR_OP(dir) closedir(dir)
1051 #else /* GLIB 2 */
1052 #  define DIRECTORY_T GDir
1053 #  define FILE_T gchar
1054 #  define OPENDIR_OP(name) g_dir_open(name, 0, dummy)
1055 #  define DIRGETNEXT_OP(dir) g_dir_read_name(dir)
1056 #  define GETFNAME_OP(file) (file);
1057 #  define CLOSEDIR_OP(dir) g_dir_close(dir)
1058 #endif
1059
1060 void init_xml_names(void) {
1061         xml_ns_t* xmlpi_xml_ns;
1062         guint i;
1063     DIRECTORY_T* dir;
1064     const FILE_T* file;
1065     const gchar* filename;
1066     gchar* dirname;
1067
1068 #if GLIB_MAJOR_VERSION >= 2
1069     GError** dummy = g_malloc(sizeof(GError *));
1070     *dummy = NULL;
1071 #endif
1072
1073         xmpli_names = g_hash_table_new(g_str_hash,g_str_equal);
1074         media_types = g_hash_table_new(g_str_hash,g_str_equal);
1075
1076         unknown_ns.elements = xml_ns.elements = g_hash_table_new(g_str_hash,g_str_equal);
1077         unknown_ns.attributes = xml_ns.attributes = g_hash_table_new(g_str_hash,g_str_equal);
1078
1079         xmlpi_xml_ns = xml_new_namespace(xmpli_names,"xml","version","encoding","standalone",NULL);
1080
1081         g_hash_table_destroy(xmlpi_xml_ns->elements);
1082         xmlpi_xml_ns->elements = NULL;
1083
1084
1085     dirname = get_persconffile_path("dtds", FALSE);
1086
1087         if (test_for_directory(dirname) != EISDIR) {
1088                 dirname = get_datafile_path("dtds");
1089     }
1090
1091         if (test_for_directory(dirname) == EISDIR) {
1092
1093         if ((dir = OPENDIR_OP(dirname)) != NULL) {
1094             while ((file = DIRGETNEXT_OP(dir)) != NULL) {
1095                 guint namelen;
1096                 filename = GETFNAME_OP(file);
1097
1098                 namelen = strlen(filename);
1099                 if ( namelen > 4 && ( g_strcasecmp(filename+(namelen-4),".dtd")  == 0 ) ) {
1100                     GString* errors = g_string_new("");
1101                     GString* preparsed = dtd_preparse(dirname, filename, errors);
1102                     dtd_build_data_t* dtd_data;
1103
1104                     if (errors->len) {
1105                         report_failure("Dtd Preparser in file %s%c%s: %s",dirname,G_DIR_SEPARATOR,filename,errors->str);
1106                         continue;
1107                     }
1108
1109                     dtd_data = dtd_parse(preparsed);
1110
1111                     g_string_free(preparsed,TRUE);
1112
1113                     if (dtd_data->error->len) {
1114                         report_failure("Dtd Parser in file %s%c%s: %s",dirname,G_DIR_SEPARATOR,filename,dtd_data->error->str);
1115                         destroy_dtd_data(dtd_data);
1116                         continue;
1117                     }
1118
1119                     register_dtd(dtd_data,errors);
1120
1121                     if (errors->len) {
1122                         report_failure("Dtd Registration in file: %s%c%s: %s",dirname,G_DIR_SEPARATOR,filename,errors->str);
1123                         g_string_free(errors,TRUE);
1124                         continue;
1125                     }
1126                 }
1127             }
1128
1129             CLOSEDIR_OP(dir);
1130         }
1131     }
1132
1133         for(i=0;i<array_length(default_media_types);i++) {
1134                 if( ! g_hash_table_lookup(media_types,default_media_types[i]) ) {
1135                         g_hash_table_insert(media_types,(gpointer)default_media_types[i],&xml_ns);
1136                 }
1137         }
1138
1139         g_hash_table_foreach(xmpli_names,add_xmlpi_namespace,"xml.xmlpi");
1140
1141 #if GLIB_MAJOR_VERSION >= 2
1142     g_free(dummy);
1143 #endif
1144 }
1145
1146 void
1147 proto_register_xml(void) {
1148
1149         static gint *ett_base[] = {
1150                 &unknown_ns.ett,
1151                 &xml_ns.ett,
1152                 &ett_dtd,
1153                 &ett_xmpli
1154         };
1155
1156         static hf_register_info hf_base[] = {
1157                 { &hf_xmlpi, {"XMLPI", "xml.xmlpi", FT_STRING, BASE_NONE, NULL, 0, "", HFILL }},
1158                 { &hf_comment, {"Comment", "xml.comment", FT_STRING, BASE_NONE, NULL, 0, "", HFILL }},
1159                 { &hf_unknowwn_attrib, {"Attribute", "xml.attribute", FT_STRING, BASE_NONE, NULL, 0, "", HFILL }},
1160                 { &hf_doctype, {"Doctype", "xml.doctype", FT_STRING, BASE_NONE, NULL, 0, "", HFILL }},
1161                 { &hf_dtd_tag, {"DTD Tag", "xml.dtdtag", FT_STRING, BASE_NONE, NULL, 0, "", HFILL }},
1162                 { &unknown_ns.hf_cdata, {"CDATA", "xml.cdata", FT_STRING, BASE_NONE, NULL, 0, "", HFILL }},
1163                 { &unknown_ns.hf_tag, {"Tag", "xml.tag", FT_STRING, BASE_NONE, NULL, 0, "", HFILL }},
1164                 { &xml_ns.hf_cdata, {"Unknown", "xml.unknown", FT_STRING, BASE_NONE, NULL, 0, "", HFILL }}
1165         };
1166
1167         hf_arr = g_array_new(FALSE,FALSE,sizeof(hf_register_info));
1168         ett_arr = g_array_new(FALSE,FALSE,sizeof(gint*));
1169
1170         g_array_append_vals(hf_arr,hf_base,array_length(hf_base));
1171         g_array_append_vals(ett_arr,ett_base,array_length(ett_base));
1172
1173         init_xml_names();
1174
1175         xml_ns.hf_tag = proto_register_protocol("eXtensible Markup Language", "XML", xml_ns.name);
1176
1177         proto_register_field_array(xml_ns.hf_tag, (hf_register_info*)hf_arr->data, hf_arr->len);
1178         proto_register_subtree_array((gint**)ett_arr->data, ett_arr->len);
1179
1180     g_array_free(hf_arr,FALSE);
1181     g_array_free(ett_arr,TRUE);
1182
1183         register_dissector("xml", dissect_xml, xml_ns.hf_tag);
1184
1185         init_xml_parser();
1186
1187 }
1188
1189 void add_dissector_media(gpointer k, gpointer v _U_, gpointer p _U_) {
1190         dissector_add_string("media_type", (gchar*)k, xml_handle);
1191 }
1192
1193 void
1194 proto_reg_handoff_xml(void)
1195 {
1196
1197         xml_handle = find_dissector("xml");
1198
1199         g_hash_table_foreach(media_types,add_dissector_media,NULL);
1200
1201 }