bsd/net/linkaddr.c

   1 /*
   2  * Copyright (c) 2017 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Copyright (c) 2007, Swedish Institute of Computer Science.
  30  * All rights reserved.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  * 3. Neither the name of the Institute nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  *
  56  * This file is part of the Contiki operating system.
  57  *
  58  */
  59
  60 /**
  61  * \file
  62  *         Functions for manipulating Rime addresses
  63  * \author
  64  *         Adam Dunkels <adam@sics.se>
  65  */
  66
  67 /**
  68  * \addtogroup linkaddr
  69  * @{
  70  */
  71
  72 #include "linkaddr.h"
  73 #include <string.h>
  74
  75 linkaddr_t linkaddr_node_addr;
  76 #if LINKADDR_SIZE == 2
  77 const linkaddr_t linkaddr_null = { { 0, 0 } };
  78 #else /*LINKADDR_SIZE == 2*/
  79 #if LINKADDR_SIZE == 8
  80 const linkaddr_t linkaddr_null = { { 0, 0, 0, 0, 0, 0, 0, 0 } };
  81 #endif /*LINKADDR_SIZE == 8*/
  82 #endif /*LINKADDR_SIZE == 2*/
  83
  84
  85 /*---------------------------------------------------------------------------*/
  86 void
  87 linkaddr_copy(linkaddr_t *dest, const linkaddr_t *src)
  88 {
  89         memcpy(dest, src, LINKADDR_SIZE);
  90 }
  91 /*---------------------------------------------------------------------------*/
  92 int
  93 linkaddr_cmp(const linkaddr_t *addr1, const linkaddr_t *addr2)
  94 {
  95         return memcmp(addr1, addr2, LINKADDR_SIZE) == 0;
  96 }
  97 /*---------------------------------------------------------------------------*/
  98 void
  99 linkaddr_set_node_addr(linkaddr_t *t)
 100 {
 101         linkaddr_copy(&linkaddr_node_addr, t);
 102 }
 103 /*---------------------------------------------------------------------------*/
 104 /** @} */