265 lines
8.5 KiB
C
265 lines
8.5 KiB
C
/****************************************************************************
|
|
* net/route/route.h
|
|
*
|
|
* Copyright (C) 2013-2014 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* 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.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "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 THE
|
|
* COPYRIGHT OWNER 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifndef __NET_ROUTE_ROUTE_H
|
|
#define __NET_ROUTE_ROUTE_H
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <queue.h>
|
|
|
|
#include <net/if.h>
|
|
|
|
#include <nuttx/net/ip.h>
|
|
|
|
#ifdef CONFIG_NET_ROUTE
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
/* Configuration ************************************************************/
|
|
|
|
#ifndef CONFIG_NET_MAXROUTES
|
|
# define CONFIG_NET_MAXROUTES 4
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Public Types
|
|
****************************************************************************/
|
|
/* This structure describes one entry in the routing table */
|
|
|
|
struct net_route_s
|
|
{
|
|
FAR struct net_route_s *flink; /* Supports a singly linked list */
|
|
net_ipaddr_t target; /* The destination network */
|
|
net_ipaddr_t netmask; /* The network address mask */
|
|
net_ipaddr_t router; /* Route packets via this router */
|
|
};
|
|
|
|
/* Type of the call out function pointer provided to net_foreachroute() */
|
|
|
|
typedef int (*route_handler_t)(FAR struct net_route_s *route, FAR void *arg);
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
#ifdef __cplusplus
|
|
#define EXTERN extern "C"
|
|
extern "C"
|
|
{
|
|
#else
|
|
#define EXTERN extern
|
|
#endif
|
|
|
|
/* This is the routing table */
|
|
|
|
EXTERN sq_queue_t g_routes;
|
|
|
|
/****************************************************************************
|
|
* Public Function Prototypes
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Function: net_initroute
|
|
*
|
|
* Description:
|
|
* Initialize to the routing table
|
|
*
|
|
* Parameters:
|
|
* None
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
void net_initroute(void);
|
|
|
|
/****************************************************************************
|
|
* Function: net_allocroute
|
|
*
|
|
* Description:
|
|
* Allocate one route by removing it from the free list
|
|
*
|
|
* Parameters:
|
|
* None
|
|
*
|
|
* Returned Value:
|
|
* On success, a pointer to the newly allocated route table entry is
|
|
* returned; NULL is returned on failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR struct net_route_s *net_allocroute(void);
|
|
|
|
/****************************************************************************
|
|
* Function: net_allocroute
|
|
*
|
|
* Description:
|
|
* Free one route by adding it from the free list
|
|
*
|
|
* Parameters:
|
|
* route - The route to be freed
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
void net_freeroute(FAR struct net_route_s *route);
|
|
|
|
/****************************************************************************
|
|
* Function: net_addroute
|
|
*
|
|
* Description:
|
|
* Add a new route to the routing table
|
|
*
|
|
* Parameters:
|
|
* target - The destination IP address on the destination network
|
|
* netmask - The mask defining the destination sub-net
|
|
* router - The IP address on one of our networks that provides the
|
|
* router to the external network
|
|
*
|
|
* Returned Value:
|
|
* OK on success; Negated errno on failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int net_addroute(net_ipaddr_t target, net_ipaddr_t netmask,
|
|
net_ipaddr_t router);
|
|
|
|
/****************************************************************************
|
|
* Function: net_delroute
|
|
*
|
|
* Description:
|
|
* Remove an existing route from the routing table
|
|
*
|
|
* Parameters:
|
|
*
|
|
* Returned Value:
|
|
* OK on success; Negated errno on failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int net_delroute(net_ipaddr_t target, net_ipaddr_t netmask);
|
|
|
|
/****************************************************************************
|
|
* Function: net_router
|
|
*
|
|
* Description:
|
|
* Given an IP address on a external network, return the address of the
|
|
* router on a local network that can forward to the external network.
|
|
*
|
|
* Parameters:
|
|
* target - An IP address on a remote network to use in the lookup.
|
|
* router - The address of router on a local network that can forward our
|
|
* packets to the target.
|
|
*
|
|
* NOTE: For IPv6, router will be an array, for IPv4 it will be a scalar
|
|
* value. Hence, the change in the function signature.
|
|
*
|
|
* Returned Value:
|
|
* OK on success; Negated errno on failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_IPv6
|
|
int net_router(net_ipaddr_t target, net_ipaddr_t router);
|
|
#else
|
|
int net_router(net_ipaddr_t target, FAR net_ipaddr_t *router);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Function: netdev_router
|
|
*
|
|
* Description:
|
|
* Given an IP address on a external network, return the address of the
|
|
* router on a local network that can forward to the external network.
|
|
* This is similar to net_router(). However, the set of routers is
|
|
* constrained to those accessible by the specific device
|
|
*
|
|
* Parameters:
|
|
* dev - We are committed to using this device.
|
|
* target - An IP address on a remote network to use in the lookup.
|
|
* router - The address of router on a local network that can forward our
|
|
* packets to the target.
|
|
*
|
|
* NOTE: For IPv6, router will be an array, for IPv4 it will be a scalar
|
|
* value. Hence, the change in the function signature.
|
|
*
|
|
* Returned Value:
|
|
* None, a router address is always returned (which may just be, perhaps,
|
|
* device's default router address)
|
|
*
|
|
****************************************************************************/
|
|
|
|
struct net_driver_s;
|
|
|
|
#ifdef CONFIG_NET_IPv6
|
|
void netdev_router(FAR struct net_driver_s *dev, net_ipaddr_t target,
|
|
net_ipaddr_t router);
|
|
#else
|
|
void netdev_router(FAR struct net_driver_s *dev, net_ipaddr_t target,
|
|
FAR net_ipaddr_t *router);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Function: net_foreachroute
|
|
*
|
|
* Description:
|
|
* Traverse the route table
|
|
*
|
|
* Parameters:
|
|
*
|
|
* Returned Value:
|
|
* OK on success; Negated errno on failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int net_foreachroute(route_handler_t handler, FAR void *arg);
|
|
|
|
#undef EXTERN
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* CONFIG_NET_ROUTE */
|
|
#endif /* __NET_ROUTE_ROUTE_H */
|