302 lines
9.8 KiB
C
302 lines
9.8 KiB
C
/****************************************************************************
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* net/route/route.h
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*
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* Copyright (C) 2013-2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __NET_ROUTE_ROUTE_H
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#define __NET_ROUTE_ROUTE_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <queue.h>
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#include <net/if.h>
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#include <nuttx/net/ip.h>
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#ifdef CONFIG_NET_ROUTE
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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#ifndef CONFIG_NET_MAXROUTES
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# define CONFIG_NET_MAXROUTES 4
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#endif
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/* This structure describes one entry in the routing table */
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struct net_route_s
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{
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FAR struct net_route_s *flink; /* Supports a singly linked list */
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in_addr_t target; /* The destination network */
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in_addr_t netmask; /* The network address mask */
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in_addr_t router; /* Route packets via this router */
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};
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/* Type of the call out function pointer provided to net_foreachroute() */
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typedef int (*route_handler_t)(FAR struct net_route_s *route, FAR void *arg);
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/* This is the routing table */
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EXTERN sq_queue_t g_routes;
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Function: net_initroute
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*
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* Description:
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* Initialize to the routing table
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*
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* Parameters:
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* None
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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void net_initroute(void);
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/****************************************************************************
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* Function: net_allocroute
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*
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* Description:
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* Allocate one route by removing it from the free list
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*
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* Parameters:
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* None
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*
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* Returned Value:
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* On success, a pointer to the newly allocated route table entry is
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* returned; NULL is returned on failure.
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*
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****************************************************************************/
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FAR struct net_route_s *net_allocroute(void);
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/****************************************************************************
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* Function: net_allocroute
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*
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* Description:
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* Free one route by adding it from the free list
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*
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* Parameters:
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* route - The route to be freed
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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void net_freeroute(FAR struct net_route_s *route);
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/****************************************************************************
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* Function: net_addroute
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*
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* Description:
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* Add a new route to the routing table
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*
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* Parameters:
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* target - The destination IP address on the destination network
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* netmask - The mask defining the destination sub-net
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* router - The IP address on one of our networks that provides the
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* router to the external network
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*
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* Returned Value:
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* OK on success; Negated errno on failure.
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*
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****************************************************************************/
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int net_addroute(in_addr_t target, in_addr_t netmask,
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in_addr_t router);
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/****************************************************************************
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* Function: net_delroute
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*
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* Description:
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* Remove an existing route from the routing table
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*
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* Parameters:
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*
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* Returned Value:
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* OK on success; Negated errno on failure.
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*
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****************************************************************************/
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int net_delroute(in_addr_t target, in_addr_t netmask);
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/****************************************************************************
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* Function: net_ipv4_router
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*
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* Description:
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* Given an IPv4 address on a external network, return the address of the
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* router on a local network that can forward to the external network.
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*
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* Parameters:
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* target - An IPv4 address on a remote network to use in the lookup.
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* router - The address of router on a local network that can forward our
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* packets to the target.
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*
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* Returned Value:
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* OK on success; Negated errno on failure.
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*
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****************************************************************************/
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#ifdef CONFIG_NET_IPv4
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int net_ipv4_router(in_addr_t target, FAR in_addr_t *router);
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#endif
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/****************************************************************************
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* Function: net_ipv6_router
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*
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* Description:
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* Given an IPv6 address on a external network, return the address of the
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* router on a local network that can forward to the external network.
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*
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* Parameters:
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* target - An IPv6 address on a remote network to use in the lookup.
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* router - The address of router on a local network that can forward our
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* packets to the target.
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*
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* Returned Value:
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* OK on success; Negated errno on failure.
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*
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****************************************************************************/
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#ifdef CONFIG_NET_IPv6
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int net_ipv6_router(net_ipv6addr_t target, net_ipv6addr_t router);
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#endif
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/****************************************************************************
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* Function: netdev_ipv4_router
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*
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* Description:
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* Given an IPv4 address on a external network, return the address of the
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* router on a local network that can forward to the external network.
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* This is similar to net_ipv4_router(). However, the set of routers is
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* constrained to those accessible by the specific device
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*
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* Parameters:
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* dev - We are committed to using this device.
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* target - An IPv4 address on a remote network to use in the lookup.
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* router - The address of router on a local network that can forward our
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* packets to the target.
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*
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* Returned Value:
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* A router address is always returned (which may just be, perhaps,
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* device's default router address)
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*
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****************************************************************************/
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#ifdef CONFIG_NET_IPv4
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struct net_driver_s;
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void netdev_ipv4_router(FAR struct net_driver_s *dev, in_addr_t target,
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FAR in_addr_t *router);
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#endif
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/****************************************************************************
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* Function: netdev_ipv6_router
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*
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* Description:
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* Given an IPv6 address on a external network, return the address of the
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* router on a local network that can forward to the external network.
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* This is similar to net_ipv6_router(). However, the set of routers is
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* constrained to those accessible by the specific device
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*
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* Parameters:
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* dev - We are committed to using this device.
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* target - An IPv6 address on a remote network to use in the lookup.
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* router - The address of router on a local network that can forward our
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* packets to the target.
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*
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* Returned Value:
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* A router address is always returned (which may just be, perhaps,
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* device's default router address)
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*
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****************************************************************************/
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#ifdef CONFIG_NET_IPv6
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struct net_driver_s;
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void netdev_ipv6_router(FAR struct net_driver_s *dev,
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FAR const net_ipv6addr_t target,
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FAR net_ipv6addr_t router);
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#endif
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/****************************************************************************
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* Function: net_foreachroute
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*
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* Description:
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* Traverse the route table
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*
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* Parameters:
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*
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* Returned Value:
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* OK on success; Negated errno on failure.
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*
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****************************************************************************/
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int net_foreachroute(route_handler_t handler, FAR void *arg);
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* CONFIG_NET_ROUTE */
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#endif /* __NET_ROUTE_ROUTE_H */
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