114 lines
4.2 KiB
C
114 lines
4.2 KiB
C
/*
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* Copyright (c) 2012, Thingsquare, http://www.thingsquare.com/.
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* All rights reserved.
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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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* 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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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software 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 HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "ip64-addr.h"
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#include <stdio.h>
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#include <string.h>
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#define printf(...)
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static uip_ip6addr_t ip64_prefix = {{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, 0, 0, 0, 0}};
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static uint8_t ip64_prefix_len = 96;
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/*---------------------------------------------------------------------------*/
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void
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ip64_addr_copy4(uip_ip4addr_t *dest, const uip_ip4addr_t *src)
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{
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memcpy(dest, src, sizeof(uip_ip4addr_t));
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}
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/*---------------------------------------------------------------------------*/
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void
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ip64_addr_copy6(uip_ip6addr_t *dest, const uip_ip6addr_t *src)
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{
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memcpy(dest, src, sizeof(uip_ip6addr_t));
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}
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/*---------------------------------------------------------------------------*/
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int
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ip64_addr_4to6(const uip_ip4addr_t *ipv4addr,
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uip_ip6addr_t *ipv6addr)
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{
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/* This function converts an IPv4 addresses into an IPv6
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addresses. It returns 0 if it failed to convert the address and
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non-zero if it could successfully convert the address. */
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uip_ipaddr_copy(ipv6addr, &ip64_prefix);
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ipv6addr->u8[12] = ipv4addr->u8[0];
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ipv6addr->u8[13] = ipv4addr->u8[1];
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ipv6addr->u8[14] = ipv4addr->u8[2];
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ipv6addr->u8[15] = ipv4addr->u8[3];
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printf("ip64_addr_4to6: IPv6-encoded IPv4 address %d.%d.%d.%d\n",
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ipv4addr->u8[0], ipv4addr->u8[1],
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ipv4addr->u8[2], ipv4addr->u8[3]);
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/* Conversion succeeded, we return non-zero. */
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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int
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ip64_addr_6to4(const uip_ip6addr_t *ipv6addr,
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uip_ip4addr_t *ipv4addr)
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{
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/* This function converts IPv6 addresses to IPv4 addresses. It
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returns 0 if it failed to convert the address and non-zero if it
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could successfully convert the address. */
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if(ip64_addr_is_ip64(ipv6addr)) {
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ipv4addr->u8[0] = ipv6addr->u8[12];
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ipv4addr->u8[1] = ipv6addr->u8[13];
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ipv4addr->u8[2] = ipv6addr->u8[14];
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ipv4addr->u8[3] = ipv6addr->u8[15];
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printf("ip64_addr_6to4: IPv6-encoded IPv4 address %d.%d.%d.%d\n",
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ipv4addr->u8[0], ipv4addr->u8[1],
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ipv4addr->u8[2], ipv4addr->u8[3]);
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/* Conversion succeeded, we return non-zero. */
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return 1;
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}
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/* We could not convert the IPv6 address, so we return 0. */
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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int
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ip64_addr_is_ip64(const uip_ip6addr_t *ipv6addr)
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{
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return uip_ipaddr_prefixcmp(ipv6addr, &ip64_prefix, ip64_prefix_len);
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}
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/*---------------------------------------------------------------------------*/
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void
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ip64_addr_set_prefix(const uip_ip6addr_t *prefix, uint8_t prefix_len)
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{
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uip_ipaddr_copy(&ip64_prefix, prefix);
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ip64_prefix_len = prefix_len;
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}
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/*---------------------------------------------------------------------------*/
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