/*
* Copyright 2011 Tresys Technology, LLC. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY TRESYS TECHNOLOGY, LLC ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL TRESYS TECHNOLOGY, LLC OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those
* of the authors and should not be interpreted as representing official policies,
* either expressed or implied, of Tresys Technology, LLC.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "cil_internal.h"
#include "cil_log.h"
#include "cil_strpool.h"
#include "cil_symtab.h"
struct cil_fqn_args {
char prefix[CIL_MAX_NAME_LENGTH];
int len;
struct cil_tree_node *node;
};
static int __cil_fqn_qualify_decls(__attribute__((unused)) hashtab_key_t k, hashtab_datum_t d, void *args)
{
struct cil_fqn_args *fqn_args = args;
struct cil_symtab_datum *datum = (struct cil_symtab_datum *)d;
int newlen;
char prefix[CIL_MAX_NAME_LENGTH];
int rc = SEPOL_OK;
if (fqn_args->len == 0) {
goto exit;
}
newlen = fqn_args->len + strlen(datum->name);
if (newlen >= CIL_MAX_NAME_LENGTH) {
cil_log(CIL_INFO, "Fully qualified name for %s is too long\n", datum->name);
rc = SEPOL_ERR;
goto exit;
}
strcpy(prefix, fqn_args->prefix);
strcat(prefix, datum->name);
datum->fqn = cil_strpool_add(prefix);
exit:
return rc;
}
static int __cil_fqn_qualify_blocks(__attribute__((unused)) hashtab_key_t k, hashtab_datum_t d, void *args)
{
struct cil_fqn_args *fqn_args = args;
struct cil_fqn_args child_args;
struct cil_block *block = (struct cil_block *)d;
struct cil_symtab_datum *datum = (struct cil_symtab_datum *)block;
struct cil_tree_node *node = NODE(datum);
int i;
int rc = SEPOL_OK;
if (node->flavor != CIL_BLOCK) {
goto exit;
}
int newlen = fqn_args->len + strlen(datum->name) + 1;
if (newlen >= CIL_MAX_NAME_LENGTH) {
cil_log(CIL_INFO, "Fully qualified name for block %s is too long\n", datum->name);
rc = SEPOL_ERR;
goto exit;
}
child_args.node = node;
child_args.len = newlen;
strcpy(child_args.prefix, fqn_args->prefix);
strcat(child_args.prefix, datum->name);
strcat(child_args.prefix, ".");
for (i=1; i<CIL_SYM_NUM; i++) {
switch (i) {
case CIL_SYM_CLASSPERMSETS:
case CIL_SYM_CONTEXTS:
case CIL_SYM_LEVELRANGES:
case CIL_SYM_IPADDRS:
case CIL_SYM_NAMES:
case CIL_SYM_PERMX:
/* These do not show up in the kernal policy */
break;
case CIL_SYM_POLICYCAPS:
/* Valid policy capability names are defined in libsepol */
break;
default:
rc = cil_symtab_map(&(block->symtab[i]), __cil_fqn_qualify_decls, &child_args);
if (rc != SEPOL_OK) {
goto exit;
}
break;
}
}
rc = cil_symtab_map(&(block->symtab[CIL_SYM_BLOCKS]), __cil_fqn_qualify_blocks, &child_args);
exit:
if (rc != SEPOL_OK) {
cil_tree_log(child_args.node, CIL_ERR,"Problem qualifying names in block");
}
return rc;
}
int cil_fqn_qualify(struct cil_tree_node *root_node)
{
struct cil_root *root = root_node->data;
struct cil_fqn_args fqn_args;
fqn_args.prefix[0] = '\0';
fqn_args.len = 0;
fqn_args.node = root_node;
return cil_symtab_map(&(root->symtab[CIL_SYM_BLOCKS]), __cil_fqn_qualify_blocks, &fqn_args);
}