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/* packet-xml.c
* an XML dissector for ethereal
*
* Copyright 2004, Luis E. Garcia Ontanon <luis.ontanon@gmail.com>
*
* $Id$
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <glib.h>
#include <epan/packet.h>
#include <epan/strutil.h>
#include <epan/prefs.h>
#include "packet-xml.h"
#ifdef DEBUG_XML
static const value_string xml_token_types[] =
{
{XML_WHITESPACE, "white space"},
{XML_PROPERTY, "property"},
{XML_COMMENT_START, "comment start"},
{XML_COMMENT_END, "comment end"},
{XML_METATAG_START, "metatag start"},
{XML_METATAG_END, "metatag end"},
{XML_TAG_START, "tag start"},
{XML_TAG_END, "tag end"},
{XML_CLOSE_TAG_END, "close tag end"},
{XML_NAME, "name"},
{XML_TEXT, "text"},
{XML_GARBLED, "garbled"},
{0, NULL}
};
static const value_string xml_ctx_types[] =
{
{XML_CTX_OUT, "no_ctx"},
{XML_CTX_COMMENT, "comment"},
{XML_CTX_TAG, "tag"},
{XML_CTX_METATAG, "meta-tag"},
{XML_CTX_CLOSETAG, "close-tag"},
{0, NULL}
};
static int hf_xml_token = -1;
static int hf_xml_token_type = -1;
static int hf_xml_ctx_type = -1;
static int ett_xml_tok = -1;
#endif /* DEBUG_XML */
static int proto_xml = -1;
static int ett_xml = -1;
static int hf_xml_metatag = -1;
static int hf_xml_tag = -1;
static int hf_xml_text = -1;
gboolean is_soap;
static proto_item* proto_tree_add_xml_item(proto_tree* tree, tvbuff_t* tvb, int offset, int len, xml_token_t* xi) {
proto_item* pi;
gchar* txt;
int hfid = 0;
switch (xi->type) {
case XML_TAG_END: if (xi->ctx == XML_CTX_TAG) hfid = hf_xml_tag; break;
case XML_METATAG_END: hfid = hf_xml_metatag; break;
case XML_TEXT: hfid = hf_xml_text; break;
default: break;
}
txt = tvb_get_string(tvb,offset,len);
if ( hfid ) {
pi = proto_tree_add_string_format(tree,hfid,tvb,offset,len,txt,"%s",format_text(txt, len));
} else {
pi = proto_tree_add_text(tree,tvb,offset,len,"%s",format_text(txt, len));
}
g_free(txt);
return pi;
}
static void dissect_xml(tvbuff_t* tvb, packet_info* pinfo _U_, proto_tree* tree) {
xml_token_t* xml_items ;
xml_token_t* xi;
xml_token_t* next_xi;
proto_item* pi = NULL;
int curr_offset = 0;
int curr_len = 0;
GPtrArray* stack;
#ifdef DEBUG_XML
proto_tree* tree2 = NULL;
proto_tree* pt = NULL;
#endif
is_soap = FALSE;
#define push() { g_ptr_array_add(stack,tree); tree = proto_item_add_subtree(pi, ett_xml); }
#define pop() { tree = g_ptr_array_remove_index(stack,stack->len - 1); }
if (tree) {
pi = proto_tree_add_item(tree, proto_xml, tvb, 0, tvb->length, FALSE);
#ifdef DEBUG_XML
tree = proto_item_add_subtree(pi, ett_xml);
pi = proto_tree_add_item(tree, proto_xml, tvb, 0, tvb->length, FALSE);
tree2 = proto_item_add_subtree(pi, ett_xml);
#else
tree = proto_item_add_subtree(pi, ett_xml);
#endif /* DEBUG_XML */
xml_items = scan_tvb_for_xml_items(tvb, 0, tvb->length);
stack = g_ptr_array_new();
for (xi = xml_items; xi; xi = xi->next) {
#ifdef DEBUG_XML
pi = proto_tree_add_item(tree2,hf_xml_token,tvb,xi->offset,xi->len,FALSE);
pt = proto_item_add_subtree(pi, ett_xml);
proto_tree_add_uint(pt,hf_xml_token_type,tvb,0,0,xi->type);
proto_tree_add_uint(pt,hf_xml_ctx_type,tvb,0,0,xi->ctx);
proto_tree_add_text(pt,tvb,0,0,"[%i,%i] (%i,%i): '%s'",curr_offset,curr_len,xi->offset,xi->len,xi->text);
#endif /* DEBUG_XML */
switch (xi->type) {
case XML_COMMENT_START:
case XML_METATAG_START:
case XML_CLOSE_TAG_START:
case XML_TAG_START:
curr_offset = xi->offset;
case XML_PROPERTY:
case XML_NAME:
curr_len += xi->len;
break;
case XML_WHITESPACE:
if (xi->ctx == XML_CTX_OUT && curr_len == 0) {
curr_offset += xi->len;
} else {
curr_len += xi->len;
}
break;
case XML_COMMENT_END:
case XML_METATAG_END:
case XML_CLOSE_TAG_END:
case XML_TEXT:
curr_len += xi->len;
proto_tree_add_xml_item(tree,tvb,curr_offset,curr_len,xi);
curr_offset = curr_offset + curr_len;
curr_len = 0;
break;
case XML_TAG_END:
curr_len += xi->len;
if (xi->ctx == XML_CTX_CLOSETAG) pop();
pi = proto_tree_add_xml_item(tree,tvb,curr_offset,curr_len,xi);
if (xi->ctx == XML_CTX_TAG) push();
curr_offset = curr_offset + curr_len;
curr_len = 0;
break;
case XML_GARBLED:
break;
}
}
for (xi = xml_items; xi; xi = next_xi) {
next_xi = xi->next;
if (xi->text) g_free(xi->text);
g_free(xi);
}
g_ptr_array_free(stack,FALSE);
}
}
void
proto_register_xml(void)
{
static hf_register_info hf[] = {
#ifdef DEBUG_XML
{ &hf_xml_token,
{ "XML Token",
"xml.token", FT_STRING, BASE_NONE,NULL,0x0,
"An XML token", HFILL }},
{ &hf_xml_token_type,
{ "XML Token Type",
"xml.token.type", FT_UINT32, BASE_DEC,xml_token_types,0x0,
"the type of an XML token", HFILL }},
{ &hf_xml_ctx_type,
{ "XML Context Type",
"xml.ctx.type", FT_UINT32, BASE_DEC,xml_ctx_types,0x0,
"the context of an XML token", HFILL }},
#endif /* DEBUG_XML */
{ &hf_xml_metatag,
{ "XML Meta Tag",
"xml.meta_tag", FT_STRING, BASE_NONE, NULL, 0x0,
"XML Meta Tag", HFILL }},
{ &hf_xml_tag,
{ "XML Tag",
"xml.tag", FT_STRING, BASE_NONE, NULL, 0x0,
"XML Tag", HFILL }},
{ &hf_xml_text,
{ "XML Text",
"xml.text", FT_STRING, BASE_NONE, NULL, 0x0,
"Text in XML", HFILL }}
};
static gint *ett[] = {
#ifdef DEBUG_XML
&ett_xml_tok,
#endif /* DEBUG_XML */
&ett_xml
};
proto_xml = proto_register_protocol("eXtensible Markup Language", "XML", "xml");
proto_register_field_array(proto_xml, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
register_dissector("xml", dissect_xml, proto_xml);
}
void
proto_reg_handoff_xml(void)
{
dissector_handle_t xml_handle;
xml_handle = find_dissector("xml");
dissector_add_string("media_type", "text/xml", xml_handle);
dissector_add_string("media_type", "application/smil", xml_handle);
dissector_add_string("media_type", "text/xml", xml_handle);
dissector_add_string("media_type", "application/xml", xml_handle);
dissector_add_string("media_type", "application/soap+xml", xml_handle);
}
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