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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
*/
#ifndef QPOL_PORTCON_QUERY_H
#define QPOL_PORTCON_QUERY_H
#ifdef __cplusplus
extern "C"
{
#endif
#include <stddef.h>
#include <stdint.h>
#include <netinet/in.h>
#include <qpol/iterator.h>
#include <qpol/policy.h>
typedef struct qpol_portcon qpol_portcon_t;
/**
* Get a single portcon statement by port range and protocol.
* @param policy The policy from which to get the portcon statement.
* @param low The low port of the range of ports (or single port).
* @param high The high port of the range of ports; if searching for a
* single port, set high equal to low.
* @param protocol The protocol used in the portcon statement.
* Value should be one of IPPROTO_TCP or IPPROTO_UDP from netinet/in.h
* @param ocon Pointer in which to store the statement returned.
* The caller should not free this pointer.
* @return 0 on success and < 0 on failure; if the call fails,
* errno will be set and *ocon will be NULL.
*/
extern 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);
/**
* Get an iterator for the portcon statements in a policy.
* @param policy The policy from which to create the iterator.
* @param iter Iterator over items of type qpol_portcon_t returned.
* The caller is responsible for calling qpol_iterator_destroy
* to free memory used by this iterator.
* It is important to note that this iterator is only valid as long
* as the policy is unmodified.
* @return 0 on success and < 0 on failure; if the call fails,
* errno will be set and *iter will be NULL.
*/
extern int qpol_policy_get_portcon_iter(const qpol_policy_t * policy, qpol_iterator_t ** iter);
/**
* Get the protocol from a portcon statement.
* @param policy The policy associated with the portcon statement.
* @param ocon The portcon statement from which to get the protocol.
* @param protocol Pointer to set to the value of protocol.
* Value will be one of IPPROTO_TCP or IPPROTO_UDP from netinet/in.h
* @return 0 on success and < 0 on failure; if the call fails,
* errno will be set and *protocol will be 0;
*/
extern int qpol_portcon_get_protocol(const qpol_policy_t * policy, const qpol_portcon_t * ocon, uint8_t * protocol);
/**
* Get the low port from a portcon statement.
* @param policy the policy associated with the portcon statement.
* @param ocon The portcon statement from which to get the low port.
* @param port Pointer to set to the port number.
* @return 0 on success < 0 on failure; if the call fails,
* errno will be set and *port will be 0.
*/
extern int qpol_portcon_get_low_port(const qpol_policy_t * policy, const qpol_portcon_t * ocon, uint16_t * port);
/**
* Get the high port from a portcon statement.
* @param policy the policy associated with the portcon statement.
* @param ocon The portcon statement from which to get the high port.
* @param port Pointer to set to the port number.
* @return 0 on success < 0 on failure; if the call fails,
* errno will be set and *port will be 0.
*/
extern int qpol_portcon_get_high_port(const qpol_policy_t * policy, const qpol_portcon_t * ocon, uint16_t * port);
/**
* Get the context from a portcon statement.
* @param policy the policy associated with the portcon statement.
* @param ocon The portcon statement from which to get the context.
* @param context Pointer in which to store the context.
* The caller should not free this pointer.
* @return 0 on success < 0 on failure; if the call fails,
* errno will be set and *context will be NULL.
*/
extern int qpol_portcon_get_context(const qpol_policy_t * policy, const qpol_portcon_t * ocon,
const qpol_context_t ** context);
#ifdef __cplusplus
}
#endif
#endif /* QPOL_PORTCON_QUERY_H */
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