84 lines
3.2 KiB
C
84 lines
3.2 KiB
C
/****************************************************************************
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* net/neighbor/neighbor.c
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*
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* Copyright (C) 2007-2009, 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* A leverage of logic from uIP which also has a BSD style license
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*
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* Copyright (c) 2006, Swedish Institute of Computer Science. All rights
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* reserved.
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* Author: Adam Dunkels <adam@sics.se>
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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 the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be 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 INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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****************************************************************************/
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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 <debug.h>
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#include <nuttx/net/ip.h>
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#include "neighbor/neighbor.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: neighbor_lookup
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*
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* Description:
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* Find an entry in the Neighbor Table and return its link layer address.
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*
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* Input Parameters:
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* ipaddr - The IPv6 address to use in the lookup;
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* lladdr - The location to return the link layer address
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*
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* Returned Value:
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* Returns OK if the address was successfully obtain; a negated errno
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* value is returned on failure.
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*
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****************************************************************************/
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FAR const struct neighbor_addr_s *neighbor_lookup(const net_ipv6addr_t ipaddr)
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{
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FAR struct neighbor_entry *neighbor;
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neighbor = neighbor_findentry(ipaddr);
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if (neighbor != NULL)
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{
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return &neighbor->ne_addr;
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}
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return NULL;
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}
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