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/***************************************************************************
* Copyright (C) 2004, 2005, 2006 by Stephen McInerney *
* spm@stedee.id.au *
* *
* $Id: regexp.c 58 2006-01-02 10:40:49Z steve $
* *
* 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. *
***************************************************************************/
/***************************************************************************
***************************************************************************
* regexp.c
*
* All the various regular expression handling
*
***************************************************************************
***************************************************************************/
/***************************************************************************
***************************************************************************
* ModificationHistory:
**********************
* 17-Mar-2005 steve Initial Creation - taken from visitors
*
***************************************************************************
***************************************************************************/
#include "dnshistory.h"
/************************************************************************
* GLOBALS *
************************************************************************/
// pcre *re_pattern_main = NULL; /* Main RE */
// pcre *re_pattern_filter = NULL; /* ignore these file types */
bool is_shown_filter = false; /* We have already displayed the filter; For errors */
/************************************************************************
* re_check_errors *
* *
* After an RE check, deal with any errors *
************************************************************************/
void
re_check_errors(int err, unsigned long int line_nbr, char *str_ptr)
{
/* err: value returned from pcre_exec */
/* str_ptr: String that failed to match */
int out_vector_size;
/* Matching failed: handle error cases */
switch (err) {
case PCRE_ERROR_NOMATCH:
ERRVPRINT(VERBOSE1, msg_W_re_match_failed, line_nbr, str_ptr);
break;
case 0:
/* The output vector wasn't big enough */
out_vector_size = OVECCOUNT / 3;
ERRVPRINT(VERBOSE1, msg_E_re_too_many_substrings, line_nbr, out_vector_size - 1);
break;
default:
ERRVPRINT(VERBOSE1, msg_W_re_match_error, err, line_nbr, str_ptr);
break;
}
}
/************************************************************************
* re_compile_failed *
* *
* Display a failed RE Compile & where *
* FATAL failure. Will exit the run. *
************************************************************************/
void
re_compile_failed(int err, const char *err_offset, char *re_str)
{
ERRVPRINT(VERBOSE0, "%s %d: %s\n%s\n", msg_F_pcre_failed_compilation, err, err_offset, re_str);
exit(V_EXIT_PCRE_COMPILE);
}
/************************************************************************
* error_substring_extract *
* *
* Display a failed substring extraction *
* Error Only, as this should have failed the RE *
* *
* Typically these are seen with invalid cookie fields, *
* or super long User Agent fields. *
************************************************************************/
void
error_substring_extract(char *failed_pattern, char *text, int substr_idx, int err, unsigned long int line_nbr)
{
if (is_shown_filter == false) {
VPRINT(VERBOSE1, "RegExp Pattern: %s\n", failed_pattern);
is_shown_filter = true;
}
ERRVPRINT(VERBOSE1, msg_E_substring_extraction, substr_idx, line_nbr);
switch (err) {
case PCRE_ERROR_NOMEMORY:
ERRVPRINT(VERBOSE1, msg_E_pcre_no_memory, "");
break;
case PCRE_ERROR_NOSUBSTRING:
ERRVPRINT(VERBOSE1, msg_E_pcre_nonexist_substring, "");
break;
default:
ERRVPRINT(VERBOSE1, msg_E_pcre_unknown, err);
}
ERRVPRINT(VERBOSE1, " %s\n", text);
}
/************************************************************************
************************************************************************
* END OF FILE *
************************************************************************
************************************************************************/
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