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|
%option noyywrap
%option nounput
%option caseless
%{
/* xml_lexer.l
* an XML dissector for ethereal
* lexical analyzer for XML
*
* 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 "packet-xml.h"
static guint8* extracted = NULL;
static gint offset;
static gint text_offset;
static gint len;
tvbuff_t* tvb;
proto_item* pi;
proto_tree* tree;
GPtrArray* stack;
static int ett_xml;
static int proto_xml;
#define YY_INPUT(buff,result,max_size) \
( (result) = tvb_yyinput((buff),(max_size)) )
#define ECHO ;
static void add_xml_item(xml_token_type_t, guint);
static int tvb_yyinput(char*, guint);
%}
xmlpi_start "<?"
xmlpi_end "?>"
comment_start <!--
comment_end -->
markupdecl_start "<!"
closetag_start "</"
tag_start "<"
tag_end >
closedtag_end "/>"
open_brace "["
dtd_doctype_stop "]"[:blank:]*>
whitespace [[:blank:]\r\n]+
text_start ([^<[:blank:]\r\n]|[^<])
text_stop <
%START OUT COMMENT TAG CLOSE_TAG XMLPI DOCTYPE MARKUPDECL TEXT
%%
<OUT>{whitespace} { text_offset = offset - yyleng; add_xml_item(XML_WHITESPACE, yyleng); }
<OUT>{dtd_doctype_stop} { text_offset = offset - yyleng; add_xml_item(XML_DOCTYPE_STOP, yyleng); }
<OUT>{text_start} { text_offset = offset - yyleng; BEGIN TEXT; }
<TEXT>{text_stop} { add_xml_item(XML_TEXT, --offset - text_offset ); BEGIN OUT; }
<OUT>{comment_start} { text_offset = offset - yyleng; BEGIN COMMENT; }
<COMMENT>{comment_end} { add_xml_item(XML_COMMENT, offset - text_offset); BEGIN OUT; }
<OUT>{closetag_start} { text_offset = offset - yyleng ; BEGIN CLOSE_TAG; }
<CLOSE_TAG>{tag_end} { add_xml_item(XML_CLOSE_TAG, offset - text_offset ); BEGIN OUT; }
<OUT>{xmlpi_start} { text_offset = offset - yyleng; BEGIN XMLPI; }
<XMLPI>{xmlpi_end} { add_xml_item(XML_XMLPI, offset - text_offset); BEGIN OUT; }
<OUT>{markupdecl_start} { text_offset = offset - yyleng -1; BEGIN MARKUPDECL; }
<MARKUPDECL>{open_brace} { add_xml_item(XML_DOCTYPE_START, offset - text_offset); BEGIN OUT; }
<MARKUPDECL>{tag_end} { add_xml_item(XML_MARKUPDECL, offset - text_offset); BEGIN OUT; }
<OUT>{tag_start} { text_offset = offset - yyleng -1; BEGIN TAG; }
<TAG>{closedtag_end} { add_xml_item(XML_CLOSEDTAG, offset - text_offset); BEGIN OUT; }
<TAG>{tag_end} { add_xml_item(XML_TAG, offset - text_offset); BEGIN OUT; }
%%
static void add_xml_item(xml_token_type_t type, guint the_len) {
switch (type) {
case XML_WHITESPACE:
break;
case XML_CLOSEDTAG:
case XML_TEXT:
case XML_MARKUPDECL:
case XML_XMLPI:
case XML_COMMENT:
pi = proto_tree_add_xml_item(tree,tvb,type,text_offset,the_len);
break;
case XML_DOCTYPE_START:
case XML_TAG:
pi = proto_tree_add_xml_item(tree,tvb,type,text_offset,the_len);
g_ptr_array_add(stack,tree);
tree = proto_item_add_subtree(pi, ett_xml);
break;
case XML_CLOSE_TAG:
case XML_DOCTYPE_STOP:
pi = proto_tree_add_xml_item(tree,tvb,type,text_offset,the_len);
if ( stack->len )
tree = g_ptr_array_remove_index(stack,stack->len - 1);
break;
}
}
static int tvb_yyinput(char* buff, guint max_len _U_) {
if ( offset < len ) {
buff[0] = extracted[offset];
offset++;
return 1;
} else {
return YY_NULL;
}
}
extern void xml_lexer_init(int proto_hfid, int ett) {
proto_xml = proto_hfid;
ett_xml = ett;
}
extern void dissect_xml(tvbuff_t* the_tvb, packet_info* pinfo _U_, proto_tree* the_tree) {
if (the_tree) {
tree = the_tree;
tvb = the_tvb;
text_offset = offset = 0;
len = tvb_length(tvb);
extracted = tvb_memdup(tvb,offset,len);
stack = g_ptr_array_new();
pi = proto_tree_add_item(tree, proto_xml, tvb, 0, -1, FALSE);
tree = proto_item_add_subtree(pi, ett_xml);
BEGIN OUT;
yylex();
yyrestart(NULL);
g_free(extracted);
g_ptr_array_free(stack,FALSE);
}
}
|
