310 lines
6.2 KiB
Plaintext
310 lines
6.2 KiB
Plaintext
%{
|
|
/*
|
|
* $Id: scanner.l,v 1.9 2003/08/27 15:23:04 gram Exp $
|
|
*
|
|
* Ethereal - Network traffic analyzer
|
|
* By Gerald Combs <gerald@ethereal.com>
|
|
* Copyright 2001 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 <stdlib.h>
|
|
#include <errno.h>
|
|
|
|
#include "glib-util.h"
|
|
#include "dfilter-int.h"
|
|
#include "syntax-tree.h"
|
|
#include "grammar.h"
|
|
|
|
#define LVAL df_lval
|
|
#define LVAL_TYPE stnode_t*
|
|
#define LVAL_INIT_VAL NULL
|
|
#define MODNAME df
|
|
|
|
#include <lemonflex-head.inc>
|
|
|
|
/*#undef YY_NO_UNPUT*/
|
|
|
|
static int set_lval(int token, gpointer data);
|
|
static int set_lval_int(int token, char *s);
|
|
static int simple(int token);
|
|
static gboolean str_to_guint32(char *s, guint32* pint);
|
|
GString* quoted_string = NULL;
|
|
|
|
#define SCAN_FAILED 0
|
|
|
|
%}
|
|
|
|
%x RANGE_INT
|
|
%x RANGE_PUNCT
|
|
%x DQUOTE
|
|
|
|
%%
|
|
|
|
[[:blank:]\n]+ /* ignore whitespace */
|
|
|
|
|
|
|
|
"(" return simple(TOKEN_LPAREN);
|
|
")" return simple(TOKEN_RPAREN);
|
|
|
|
"==" return simple(TOKEN_TEST_EQ);
|
|
"eq" return simple(TOKEN_TEST_EQ);
|
|
"!=" return simple(TOKEN_TEST_NE);
|
|
"ne" return simple(TOKEN_TEST_NE);
|
|
">" return simple(TOKEN_TEST_GT);
|
|
"gt" return simple(TOKEN_TEST_GT);
|
|
">=" return simple(TOKEN_TEST_GE);
|
|
"ge" return simple(TOKEN_TEST_GE);
|
|
"<" return simple(TOKEN_TEST_LT);
|
|
"lt" return simple(TOKEN_TEST_LT);
|
|
"<=" return simple(TOKEN_TEST_LE);
|
|
"le" return simple(TOKEN_TEST_LE);
|
|
"contains" return simple(TOKEN_TEST_CONTAINS);
|
|
|
|
"!" return simple(TOKEN_TEST_NOT);
|
|
"not" return simple(TOKEN_TEST_NOT);
|
|
"&&" return simple(TOKEN_TEST_AND);
|
|
"and" return simple(TOKEN_TEST_AND);
|
|
"||" return simple(TOKEN_TEST_OR);
|
|
"or" return simple(TOKEN_TEST_OR);
|
|
|
|
|
|
|
|
"[" {
|
|
BEGIN(RANGE_INT);
|
|
return simple(TOKEN_LBRACKET);
|
|
}
|
|
|
|
<RANGE_INT>[+-]?[[:digit:]]+ {
|
|
BEGIN(RANGE_PUNCT);
|
|
return set_lval_int(TOKEN_INTEGER, yytext);
|
|
}
|
|
|
|
<RANGE_INT>[+-]?0x[[:xdigit:]]+ {
|
|
BEGIN(RANGE_PUNCT);
|
|
return set_lval_int(TOKEN_INTEGER, yytext);
|
|
}
|
|
|
|
<RANGE_INT,RANGE_PUNCT>":" {
|
|
BEGIN(RANGE_INT);
|
|
return simple(TOKEN_COLON);
|
|
}
|
|
|
|
<RANGE_PUNCT>"-" {
|
|
BEGIN(RANGE_INT);
|
|
return simple(TOKEN_HYPHEN);
|
|
}
|
|
|
|
<RANGE_INT,RANGE_PUNCT>"," {
|
|
BEGIN(RANGE_INT);
|
|
return simple(TOKEN_COMMA);
|
|
}
|
|
|
|
<RANGE_INT,RANGE_PUNCT>"]" {
|
|
BEGIN(INITIAL);
|
|
return simple(TOKEN_RBRACKET);
|
|
}
|
|
|
|
\" {
|
|
/* start quote */
|
|
/* The example of how to scan for strings was taken from
|
|
the flex 2.5.4 manual, from the section "Start Conditions".
|
|
See:
|
|
http://www.gnu.org/manual/flex-2.5.4/html_node/flex_11.html */
|
|
|
|
BEGIN(DQUOTE);
|
|
g_assert(!quoted_string);
|
|
quoted_string = g_string_new("");
|
|
}
|
|
|
|
<DQUOTE>\" {
|
|
/* end quote */
|
|
char *my_string = g_strdup(quoted_string->str);
|
|
BEGIN(INITIAL);
|
|
g_string_free(quoted_string, TRUE);
|
|
quoted_string = NULL;
|
|
return set_lval(TOKEN_STRING, my_string);
|
|
}
|
|
|
|
<DQUOTE>\\[0-7]{1,3} {
|
|
/* octal sequence */
|
|
unsigned int result;
|
|
sscanf(yytext + 1, "%o", &result);
|
|
if (result > 0xff) {
|
|
g_string_free(quoted_string, TRUE);
|
|
quoted_string = NULL;
|
|
dfilter_fail("%s is larger than 255.", yytext);
|
|
return SCAN_FAILED;
|
|
}
|
|
g_string_append_c(quoted_string, result);
|
|
}
|
|
|
|
<DQUOTE>\\x[[:xdigit:]]{1,2} {
|
|
/* hex sequence */
|
|
unsigned int result;
|
|
sscanf(yytext + 2, "%x", &result);
|
|
g_string_append_c(quoted_string, result);
|
|
}
|
|
|
|
|
|
<DQUOTE>\\. {
|
|
/* escaped character */
|
|
g_string_append_c(quoted_string, yytext[1]);
|
|
}
|
|
|
|
<DQUOTE>[^\\\"]+ {
|
|
/* non-escaped string */
|
|
g_string_append(quoted_string, yytext);
|
|
}
|
|
|
|
|
|
|
|
[-[:alnum:]_\.]+\/[[:digit:]]+ {
|
|
/* CIDR */
|
|
return set_lval(TOKEN_UNPARSED, g_strdup(yytext));
|
|
}
|
|
|
|
[-[:alnum:]_.:]+ {
|
|
/* Is it a field name? */
|
|
header_field_info *hfinfo;
|
|
|
|
hfinfo = proto_registrar_get_byname(yytext);
|
|
if (hfinfo) {
|
|
/* Yes, it's a field name */
|
|
return set_lval(TOKEN_FIELD, hfinfo);
|
|
}
|
|
else {
|
|
/* No, so treat it as an unparsed string */
|
|
return set_lval(TOKEN_UNPARSED, g_strdup(yytext));
|
|
}
|
|
}
|
|
|
|
. {
|
|
/* Default */
|
|
return set_lval(TOKEN_UNPARSED, g_strdup(yytext));
|
|
}
|
|
|
|
|
|
%%
|
|
|
|
static int
|
|
simple(int token)
|
|
{
|
|
switch (token) {
|
|
case TOKEN_LPAREN:
|
|
case TOKEN_RPAREN:
|
|
case TOKEN_LBRACKET:
|
|
case TOKEN_RBRACKET:
|
|
case TOKEN_COLON:
|
|
case TOKEN_COMMA:
|
|
case TOKEN_HYPHEN:
|
|
case TOKEN_TEST_EQ:
|
|
case TOKEN_TEST_NE:
|
|
case TOKEN_TEST_GT:
|
|
case TOKEN_TEST_GE:
|
|
case TOKEN_TEST_LT:
|
|
case TOKEN_TEST_LE:
|
|
case TOKEN_TEST_CONTAINS:
|
|
case TOKEN_TEST_NOT:
|
|
case TOKEN_TEST_AND:
|
|
case TOKEN_TEST_OR:
|
|
break;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
return token;
|
|
}
|
|
|
|
static int
|
|
set_lval(int token, gpointer data)
|
|
{
|
|
sttype_id_t type_id = STTYPE_UNINITIALIZED;
|
|
|
|
switch (token) {
|
|
case TOKEN_STRING:
|
|
type_id = STTYPE_STRING;
|
|
break;
|
|
case TOKEN_FIELD:
|
|
type_id = STTYPE_FIELD;
|
|
break;
|
|
case TOKEN_UNPARSED:
|
|
type_id = STTYPE_UNPARSED;
|
|
break;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
|
|
stnode_init(df_lval, type_id, data);
|
|
return token;
|
|
}
|
|
|
|
static int
|
|
set_lval_int(int token, char *s)
|
|
{
|
|
sttype_id_t type_id = STTYPE_UNINITIALIZED;
|
|
guint32 val;
|
|
|
|
if (!str_to_guint32(s, &val)) {
|
|
return SCAN_FAILED;
|
|
}
|
|
|
|
switch (token) {
|
|
case TOKEN_INTEGER:
|
|
type_id = STTYPE_INTEGER;
|
|
break;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
|
|
stnode_init_int(df_lval, type_id, val);
|
|
return token;
|
|
}
|
|
|
|
|
|
static gboolean
|
|
str_to_guint32(char *s, guint32* pint)
|
|
{
|
|
char *endptr;
|
|
guint32 integer;
|
|
|
|
integer = strtoul(s, &endptr, 0);
|
|
|
|
if (endptr == s || *endptr != '\0') {
|
|
/* This isn't a valid number. */
|
|
dfilter_fail("\"%s\" is not a valid number.", s);
|
|
return FALSE;
|
|
}
|
|
if (errno == ERANGE) {
|
|
if (integer == ULONG_MAX) {
|
|
dfilter_fail("\"%s\" causes an integer overflow.", s);
|
|
}
|
|
else {
|
|
dfilter_fail("\"%s\" is not an integer.", s);
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
*pint = integer;
|
|
return TRUE;
|
|
}
|
|
|
|
#include <lemonflex-tail.inc>
|