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/**
* @file
* Defines the public interface for searching and iterating over portcon statements.
*
* @author Kevin Carr kcarr@tresys.com
* @author Jeremy A. Mowery jmowery@tresys.com
* @author Jason Tang jtang@tresys.com
*
* Copyright (C) 2006-2007 Tresys Technology, LLC
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stddef.h>
#include <stdlib.h>
#include <stdint.h>
#include <netinet/in.h>
#include <qpol/iterator.h>
#include <qpol/policy.h>
#include <qpol/context_query.h>
#include <qpol/portcon_query.h>
#include <sepol/policydb/policydb.h>
#include "qpol_internal.h"
#include "iterator_internal.h"
int qpol_policy_get_portcon_by_port(const qpol_policy_t * policy, uint16_t low, uint16_t high, uint8_t protocol,
const qpol_portcon_t ** ocon)
{
ocontext_t *tmp = NULL;
policydb_t *db = NULL;
if (ocon != NULL)
*ocon = NULL;
if (policy == NULL || ocon == NULL) {
ERR(policy, "%s", strerror(EINVAL));
errno = EINVAL;
return STATUS_ERR;
}
db = &policy->p->p;
for (tmp = db->ocontexts[OCON_PORT]; tmp; tmp = tmp->next) {
if (tmp->u.port.low_port == low && tmp->u.port.high_port == high && tmp->u.port.protocol == protocol)
break;
}
*ocon = (qpol_portcon_t *) tmp;
if (*ocon == NULL) {
ERR(policy, "could not find portcon statement for %u-%u:%u", low, high, protocol);
errno = ENOENT;
return STATUS_ERR;
}
return STATUS_SUCCESS;
}
int qpol_policy_get_portcon_iter(const qpol_policy_t * policy, qpol_iterator_t ** iter)
{
policydb_t *db = NULL;
int error = 0;
ocon_state_t *os = NULL;
if (iter != NULL)
*iter = NULL;
if (policy == NULL || iter == NULL) {
ERR(policy, "%s", strerror(EINVAL));
errno = EINVAL;
return STATUS_ERR;
}
db = &policy->p->p;
os = calloc(1, sizeof(ocon_state_t));
if (os == NULL) {
error = errno;
ERR(policy, "%s", strerror(ENOMEM));
errno = error;
return STATUS_ERR;
}
os->head = os->cur = db->ocontexts[OCON_PORT];
if (qpol_iterator_create(policy, (void *)os, ocon_state_get_cur,
ocon_state_next, ocon_state_end, ocon_state_size, free, iter)) {
free(os);
return STATUS_ERR;
}
return STATUS_SUCCESS;
}
int qpol_portcon_get_protocol(const qpol_policy_t * policy, const qpol_portcon_t * ocon, uint8_t * protocol)
{
ocontext_t *internal_ocon = NULL;
if (protocol != NULL)
*protocol = 0;
if (policy == NULL || ocon == NULL || protocol == NULL) {
ERR(policy, "%s", strerror(EINVAL));
errno = EINVAL;
return STATUS_ERR;
}
internal_ocon = (ocontext_t *) ocon;
*protocol = internal_ocon->u.port.protocol;
return STATUS_SUCCESS;
}
int qpol_portcon_get_low_port(const qpol_policy_t * policy, const qpol_portcon_t * ocon, uint16_t * port)
{
ocontext_t *internal_ocon = NULL;
if (port != NULL)
*port = 0;
if (policy == NULL || ocon == NULL || port == NULL) {
ERR(policy, "%s", strerror(EINVAL));
errno = EINVAL;
return STATUS_ERR;
}
internal_ocon = (ocontext_t *) ocon;
*port = internal_ocon->u.port.low_port;
return STATUS_SUCCESS;
}
int qpol_portcon_get_high_port(const qpol_policy_t * policy, const qpol_portcon_t * ocon, uint16_t * port)
{
ocontext_t *internal_ocon = NULL;
if (port != NULL)
*port = 0;
if (policy == NULL || ocon == NULL || port == NULL) {
ERR(policy, "%s", strerror(EINVAL));
errno = EINVAL;
return STATUS_ERR;
}
internal_ocon = (ocontext_t *) ocon;
*port = internal_ocon->u.port.high_port;
return STATUS_SUCCESS;
}
int qpol_portcon_get_context(const qpol_policy_t * policy, const qpol_portcon_t * ocon, const qpol_context_t ** context)
{
ocontext_t *internal_ocon = NULL;
if (context != NULL)
*context = NULL;
if (policy == NULL || ocon == NULL || context == NULL) {
ERR(policy, "%s", strerror(EINVAL));
errno = EINVAL;
return STATUS_ERR;
}
internal_ocon = (ocontext_t *) ocon;
*context = (qpol_context_t *) & (internal_ocon->context[0]);
return STATUS_SUCCESS;
}
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