-/* $OSSEC, os_xml_node_variables.c, v0.3, 2005/04/12, Daniel B. Cid$ */
-
/* Copyright (C) 2009 Trend Micro Inc.
* All rights reserved.
*
* This program is a free software; you can redistribute it
* and/or modify it under the terms of the GNU General Public
- * License (version 3) as published by the FSF - Free Software
+ * License (version 2) as published by the FSF - Free Software
* Foundation
*/
-/* os_xml C Library.
- * Available at http://www.ossec.net/
- */
-
-
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "os_xml.h"
+#include "os_xml_internal.h"
+
int OS_ApplyVariables(OS_XML *_lxml)
{
- int i = 0,j = 0,s = 0;
+ unsigned int i, j = 0, s = 0;
+ int retval = 0;
char **var = NULL;
char **value = NULL;
+ char **tmp = NULL;
+ char *p2 = NULL;
+ char *var_placeh = NULL;
+ /* Get all variables */
+ for (i = 0; i < _lxml->cur; i++) {
+ if (_lxml->tp[i] == XML_VARIABLE_BEGIN) {
+ int _found_var = 0;
- /* No variables. */
- if(!_lxml->cur)
- return(0);
+ for (j = i + 1; j < _lxml->cur; j++) {
+ if (_lxml->rl[j] < _lxml->rl[i]) {
+ break;
+ }
+ else if (_lxml->tp[j] == XML_ATTR) {
+ if ((_lxml->el[j]) && (strcasecmp(_lxml->el[j], XML_VAR_ATTRIBUTE) == 0)) {
+ if (!_lxml->ct[j]) {
+ snprintf(_lxml->err, XML_ERR_LENGTH, "XMLERR: Invalid variable content.");
+ _lxml->err_line = _lxml->ln[j];
+ goto fail;
+ } else if (strlen(_lxml->ct[j]) >= XML_VARIABLE_MAXSIZE) {
+ snprintf(_lxml->err, XML_ERR_LENGTH, "XMLERR: Invalid variable name size.");
+ _lxml->err_line = _lxml->ln[j];
+ goto fail;
+ }
- /* Getting all variables */
- for(;i<_lxml->cur;i++)
- {
- if(_lxml->tp[i] == XML_VARIABLE_BEGIN)
- {
- int _found_var = 0;
+ /* If not used, it will be cleaned later */
+ snprintf(_lxml->err, XML_ERR_LENGTH, "XMLERR: Memory error.");
- j = i+1;
- for(;j<_lxml->cur;j++)
- {
- if(_lxml->rl[j] < _lxml->rl[i])
- break;
+ tmp = (char **)realloc(var, (s + 1) * sizeof(char *));
+ if (tmp == NULL) {
+ goto fail;
+ }
+ var = tmp;
+
+ var[s] = _lxml->ct[j];
- else if(_lxml->tp[j] == XML_ATTR)
- {
- if((_lxml->el[j])&&(strcasecmp(_lxml->el[j],"name") == 0))
- {
- if(!_lxml->ct[j])
- break;
-
- /* If not used, it will be cleaned latter */
- snprintf(_lxml->err, 128, "XML_ERR: Memory error");
-
- var = (char**)realloc(var,(s+1)*sizeof(char *));
- if(var == NULL)
- return (-1);
-
- var[s] = strdup(_lxml->ct[j]);
- if(var[s] == NULL)
- return(-1);
-
- /* Cleaning the lxml->err */
- strncpy(_lxml->err," ", 3);
+ /* Clean the lxml->err */
+ strncpy(_lxml->err, " ", 3);
_found_var = 1;
break;
- }
- else
- {
- snprintf(_lxml->err, 128,
- "XML_ERR: Only \"name\" is allowed"
- " as an attribute for a variable");
- return(-1);
+ } else {
+ snprintf(_lxml->err, XML_ERR_LENGTH,
+ "XMLERR: Only \""XML_VAR_ATTRIBUTE"\" is allowed"
+ " as an attribute for a variable.");
+ _lxml->err_line = _lxml->ln[j];
+ goto fail;
}
}
} /* Attribute FOR */
-
-
- if((_found_var == 0)||(!_lxml->ct[i]))
- {
- snprintf(_lxml->err,128,
- "XML_ERR: Bad formed variable. No value set");
- return(-1);
+
+
+ if ((_found_var == 0) || (!_lxml->ct[i])) {
+ snprintf(_lxml->err, XML_ERR_LENGTH,
+ "XMLERR: No value set for variable.");
+ _lxml->err_line = _lxml->ln[i];
+ goto fail;
}
-
-
- snprintf(_lxml->err,128, "XML_ERR: Memory error");
-
- value = (char**)realloc(value,(s+1)*sizeof(char *));
- if (value == NULL)
- return(-1);
-
- value[s] = strdup(_lxml->ct[i]);
- if(value[s] == NULL)
- return(-1);
-
- strncpy(_lxml->err," ", 3);
+
+ snprintf(_lxml->err, XML_ERR_LENGTH, "XMLERR: Memory error.");
+
+ tmp = (char **)realloc(value, (s + 1) * sizeof(char *));
+ if (tmp == NULL) {
+ goto fail;
+ }
+ value = tmp;
+
+ value[s] = _lxml->ct[i];
+
+ strncpy(_lxml->err, " ", 3);
s++;
- }
- } /* initial FOR to get the variables */
-
-
- /* No variable */
- if(s == 0)
- return(0);
-
-
- /* Looping again and modifying where found the variables */
- i = 0;
- for(;i<_lxml->cur;i++)
- {
- if(((_lxml->tp[i] == XML_ELEM) || (_lxml->tp[i] == XML_ATTR))&&
- (_lxml->ct[i]))
- {
- int tp = 0,init = 0,final = 0;
+ } else if (((_lxml->tp[i] == XML_ELEM) || (_lxml->tp[i] == XML_ATTR)) &&
+ (_lxml->ct[i])) {
+ unsigned int tp = 0;
+ size_t init = 0;
char *p = NULL;
- char *p2= NULL;
- char lvar[256]; /* MAX Var size */
-
-
- if(strlen(_lxml->ct[i]) <= 2)
+ char lvar[XML_VARIABLE_MAXSIZE]; /* MAX Var size */
+
+
+ if (strlen(_lxml->ct[i]) <= 2) {
continue;
-
-
- /* Duplicating string */
+ }
+
+ /* Check if any variable is defined */
+ if (s == 0) {
+ continue;
+ }
+
+ /* Duplicate string */
p = strdup(_lxml->ct[i]);
- p2= p;
-
- if(p == NULL)
- {
- snprintf(_lxml->err, 128, "XML_ERR: Memory error");
- return(-1);
+ p2 = p;
+
+ if (p == NULL) {
+ snprintf(_lxml->err, XML_ERR_LENGTH, "XMLERR: Memory error.");
+ goto fail;
}
-
-
- /* Reading the whole string */
- while(*p != '\0')
- {
- if(*p == XML_VARIABLE_BEGIN)
- {
+
+ /* Read the whole string */
+ while (*p != '\0') {
+ if (*p == XML_VARIABLE_BEGIN) {
tp = 0;
p++;
- memset(lvar, '\0', 256);
-
- while(1)
- {
- if((*p == XML_VARIABLE_BEGIN)
- ||(*p == '\0')
- ||(*p == '.')
- ||(*p == '|')
- ||(*p == ',')
- ||(*p == ' '))
- {
- lvar[tp]='\0';
-
- final = init+tp;
-
- /* Looking for var */
- for(j=0; j<s; j++)
- {
- int tsize = 0;
-
- /* Store everything up the variable name */
- char *var_placeh;
-
-
- if(var[j] == NULL)
+ memset(lvar, '\0', XML_VARIABLE_MAXSIZE);
+
+ while (1) {
+ if ((*p == XML_VARIABLE_BEGIN)
+ || (*p == '\0')
+ || (*p == '.')
+ || (*p == '|')
+ || (*p == ',')
+ || (*p == ' ')) {
+ lvar[tp] = '\0';
+
+ /* Look for var */
+ for (j = 0; j < s; j++) {
+ if (var[j] == NULL) {
break;
+ }
- if(strcasecmp(var[j], lvar) != 0)
- {
+ if (strcasecmp(var[j], lvar) != 0) {
continue;
}
-
- tsize = strlen(_lxml->ct[i]) +
- strlen(value[j]) - tp + 1;
-
+ size_t tsize = strlen(_lxml->ct[i]) +
+ strlen(value[j]) - tp + 1;
var_placeh = strdup(_lxml->ct[i]);
-
free(_lxml->ct[i]);
+ _lxml->ct[i] = (char *)calloc(tsize + 2,
+ sizeof(char));
- _lxml->ct[i] = (char*)calloc(tsize +2,
- sizeof(char));
-
- if(_lxml->ct[i] == NULL || var_placeh == NULL)
- {
- snprintf(_lxml->err,128, "XML_ERR: Memory "
- "error");
- return(-1);
+ if (_lxml->ct[i] == NULL || var_placeh == NULL) {
+ snprintf(_lxml->err, XML_ERR_LENGTH, "XMLERR: Memory "
+ "error.");
+ goto fail;
}
-
strncpy(_lxml->ct[i], var_placeh, tsize);
-
_lxml->ct[i][init] = '\0';
- strncat(_lxml->ct[i], value[j],tsize - init);
-
+ strncat(_lxml->ct[i], value[j], tsize - init);
init = strlen(_lxml->ct[i]);
- strncat(_lxml->ct[i], p,
- tsize - strlen(_lxml->ct[i]));
-
+ strncat(_lxml->ct[i], p,
+ tsize - strlen(_lxml->ct[i]));
free(var_placeh);
+ var_placeh = NULL;
break;
}
-
- /* Variale not found */
- if((j == s) && (strlen(lvar) >= 1))
- {
- snprintf(_lxml->err,128,
- "XML_ERR: Unknown variable"
- ": %s", lvar);
- return(-1);
- }
- else if(j == s)
- {
+
+ /* Variable not found */
+ if ((j == s) && (strlen(lvar) >= 1)) {
+ snprintf(_lxml->err, XML_ERR_LENGTH,
+ "XMLERR: Unknown variable"
+ ": '%s'.", lvar);
+ _lxml->err_line = _lxml->ln[i];
+ goto fail;
+ } else if (j == s) {
init++;
}
-
+
goto go_next;
}
-
+
/* Maximum size for a variable */
- if(tp >= 255)
- {
- snprintf(_lxml->err,128, "XML_ERR: Invalid "
- "variable size.");
- return(-1);
+ if (tp >= XML_VARIABLE_MAXSIZE - 1) {
+ snprintf(_lxml->err, XML_ERR_LENGTH, "XMLERR: Invalid "
+ "variable name size: '%u'.", tp);
+ _lxml->err_line = _lxml->ln[i];
+ goto fail;
}
-
+
lvar[tp] = *p;
tp++;
p++;
}
} /* IF XML_VAR_BEGIN */
-
+
p++;
init++;
- go_next:
+go_next:
continue;
-
+
} /* WHILE END */
-
- if(p2 != NULL)
- {
+
+ if (p2 != NULL) {
free(p2);
p2 = NULL;
p = NULL;
}
}
+ goto cleanup;
- /* Cleaning the variables */
- for(i=0;i<s;i++)
- {
- if((var)&&(var[i]))
- {
- free(var[i]);
- var[i] = NULL;
- }
- if((value)&&(value[i]))
- {
- free(value[i]);
- value[i] = NULL;
- }
- }
-
- if(var != NULL)
- {
- free(var);
- var = NULL;
- }
- if(value != NULL)
- {
- free(value);
- value = NULL;
- }
+fail:
+ retval = -1;
+
+cleanup:
+ /* Clean up the variables */
+ free(var);
+ free(value);
+ free(p2);
+ free(var_placeh);
- return(0);
+ return (retval);
}
-/* UFA :) or EOF */
projects / ossec-hids.git / blobdiff