nuttx/net/route/fileroute.h

/****************************************************************************
 * net/route/fileroute.h
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The
 * ASF licenses this file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 ****************************************************************************/

#ifndef __NET_ROUTE_FILEROUTE_H
#define __NET_ROUTE_FILEROUTE_H

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

#include <sys/types.h>

#include "route/route.h"

#if defined(CONFIG_ROUTE_IPv4_FILEROUTE) || defined(CONFIG_ROUTE_IPv6_FILEROUTE)

/****************************************************************************
 * Pre-processor Definitions
 ****************************************************************************/

#define IPv4_ROUTE_PATH  CONFIG_ROUTE_FILEDIR "/ipv4"
#define IPv6_ROUTE_PATH  CONFIG_ROUTE_FILEDIR "/ipv6"

/****************************************************************************
 * Public Function Prototypes
 ****************************************************************************/

struct file; /* Forward reference */

/****************************************************************************
 * Name: net_openroute_ipv4/net_openroute_ipv6
 *
 * Description:
 *   Open the IPv4/IPv6 routing table with the specified access privileges.
 *
 * Input Parameters:
 *   oflags - Open flags
 *   filep  - Location in which to return the detached file instance.
 *
 * Returned Value:
 *   A non-negative file descriptor is returned on success.  A negated errno
 *   value is returned on any failure.
 *
 ****************************************************************************/

#ifdef CONFIG_ROUTE_IPv4_FILEROUTE
int net_openroute_ipv4(int oflags, FAR struct file *filep);
#endif

#ifdef CONFIG_ROUTE_IPv6_FILEROUTE
int net_openroute_ipv6(int oflags, FAR struct file *filep);
#endif

/****************************************************************************
 * Name: net_readroute_ipv4/net_readroute_ipv6
 *
 * Description:
 *   Read one route entry from the IPv4/IPv6 routing table.
 *
 * Input Parameters:
 *   filep - Detached file instance obtained by
 *           net_openroute_ipv{4|6}[_rdonly]
 *   route - Location to return the next route read from the file
 *
 * Returned Value:
 *   The number of bytes read on success.  The special return valud of zero
 *   indicates that the endof of file was encountered (and nothing was read).
 *   A negated errno value is returned on any failure.
 *
 ****************************************************************************/

#ifdef CONFIG_ROUTE_IPv4_FILEROUTE
ssize_t net_readroute_ipv4(FAR struct file *filep,
                           FAR struct net_route_ipv4_s *route);
#endif

#ifdef CONFIG_ROUTE_IPv6_FILEROUTE
ssize_t net_readroute_ipv6(FAR struct file *filep,
                           FAR struct net_route_ipv6_s *route);
#endif

/****************************************************************************
 * Name: net_writeroute_ipv4/net_writeroute_ipv6
 *
 * Description:
 *   Write one route entry to the IPv4/IPv6 routing table.
 *
 * Input Parameters:
 *   filep - Detached file instance obtained by
 *           net_openroute_ipv{4|6}[_rdonly]
 *   route - Location to return the next route read from the file
 *
 * Returned Value:
 *   The number of bytes written on success.  A negated errno value is
 *   returned on any failure.
 *
 ****************************************************************************/

#ifdef CONFIG_ROUTE_IPv4_FILEROUTE
ssize_t net_writeroute_ipv4(FAR struct file *filep,
                            FAR const struct net_route_ipv4_s *route);
#endif

#ifdef CONFIG_ROUTE_IPv6_FILEROUTE
ssize_t net_writeroute_ipv6(FAR struct file *filep,
                            FAR const struct net_route_ipv6_s *route);
#endif

/****************************************************************************
 * Name: net_seekroute_ipv4/net_seekroute_ipv6
 *
 * Description:
 *   Seek to a specific entry entry to the IPv4/IPv6 routing table.
 *
 * Input Parameters:
 *   filep - Detached file instance obtained by
 *           net_openroute_ipv{4|6}[_rdonly]
 *   index - The index of the routing table entry to seek to.
 *
 * Returned Value:
 *   Zero (OK) is returned on success; a negated errno value is returned on
 *   failure.
 *
 ****************************************************************************/

#ifdef CONFIG_ROUTE_IPv4_FILEROUTE
off_t net_seekroute_ipv4(FAR struct file *filep, unsigned int index);
#endif

#ifdef CONFIG_ROUTE_IPv6_FILEROUTE
off_t net_seekroute_ipv6(FAR struct file *filep, unsigned int index);
#endif

/****************************************************************************
 * Name: net_routesize_ipv4/net_routesize_ipv6
 *
 * Description:
 *   Return the size of a routing table in terms of the number of entries in
 *   the routing table.
 *
 * Input Parameters:
 *   None
 *
 * Returned Value:
 *   A non-negative count of the number of entries in the routing table is
 *   returned on success; a negated errno value is returned on and failure.
 *
 * Assumptions:
 *   The size of the routing table may change after this size is returned
 *   unless the routing table is locked to prevent any modification to the
 *   routing table.
 *
 ****************************************************************************/

#ifdef CONFIG_ROUTE_IPv4_FILEROUTE
int net_routesize_ipv4(void);
#endif

#ifdef CONFIG_ROUTE_IPv6_FILEROUTE
int net_routesize_ipv6(void);
#endif

/****************************************************************************
 * Name: net_lockroute_ipv4/net_lockroute_ipv6
 *
 * Description:
 *   Lock access to the routing table.  Necessary when a routing table is
 *   being reorganized due to deletion of a route.
 *
 * Input Parameters:
 *   None
 *
 * Returned Value:
 *   Zero (OK) is returned on success; a negated errno value is returned on
 *   any failure.
 *
 ****************************************************************************/

#ifdef CONFIG_ROUTE_IPv4_FILEROUTE
int net_lockroute_ipv4(void);
#endif

#ifdef CONFIG_ROUTE_IPv6_FILEROUTE
int net_lockroute_ipv6(void);
#endif

/****************************************************************************
 * Name: net_unlockroute_ipv4/net_unlockroute_ipv6
 *
 * Description:
 *   Release the read lock.
 *
 * Input Parameters:
 *   None
 *
 * Returned Value:
 *   Zero (OK) is returned on success; a negated errno value is returned on
 *   any failure.
 *
 ****************************************************************************/

#ifdef CONFIG_ROUTE_IPv4_FILEROUTE
int net_unlockroute_ipv4(void);
#endif

#ifdef CONFIG_ROUTE_IPv6_FILEROUTE
int net_unlockroute_ipv6(void);
#endif

/****************************************************************************
 * Name: net_closeroute_ipv4/net_closeroute_ipv6
 *
 * Description:
 *   Close the IPv4/IPv6 routing table.
 *
 * Input Parameters:
 *   filep - Detached file instance obtained by
 *           net_openroute_ipv{4|6}[_rdonly]
 *
 * Returned Value:
 *   Zero (OK) is returned on success.  A negated errno value is returned on
 *   any failure.
 *
 ****************************************************************************/

#ifdef CONFIG_ROUTE_IPv4_FILEROUTE
int net_closeroute_ipv4(FAR struct file *filep);
#endif

#ifdef CONFIG_ROUTE_IPv6_FILEROUTE
int net_closeroute_ipv6(FAR struct file *filep);
#endif

#endif /* CONFIG_ROUTE_IPv4_FILEROUTE || CONFIG_ROUTE_IPv6_FILEROUTE */
#endif /* __NET_ROUTE_FILEROUTE_H */