nes-proj/os/net/ipv6/uip-debug.c

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/*
* Copyright (c) 2010, Swedish Institute of Computer Science.
* All rights reserved.
*
* 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 of the Institute 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 INSTITUTE 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 INSTITUTE 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.
*
*/
/**
* \file
* A set of debugging tools for the IP stack
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* \author
* Nicolas Tsiftes <nvt@sics.se>
* Niclas Finne <nfi@sics.se>
* Joakim Eriksson <joakime@sics.se>
*/
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#include "net/ipv6/uip-debug.h"
#include "net/ipv6/ip64-addr.h"
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/*---------------------------------------------------------------------------*/
void
uip_debug_ipaddr_print(const uip_ipaddr_t *addr)
{
uint16_t a;
unsigned int i;
int f;
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if(addr == NULL) {
PRINTA("(NULL IP addr)");
return;
}
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if(ip64_addr_is_ipv4_mapped_addr(addr)) {
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/*
* Printing IPv4-mapped addresses is done according to RFC 4291 [1]
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*
* "An alternative form that is sometimes more
* convenient when dealing with a mixed environment
* of IPv4 and IPv6 nodes is x:x:x:x:x:x:d.d.d.d,
* where the 'x's are the hexadecimal values of the
* six high-order 16-bit pieces of the address, and
* the 'd's are the decimal values of the four
* low-order 8-bit pieces of the address (standard
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* IPv4 representation)."
*
* [1] https://tools.ietf.org/html/rfc4291#page-4
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*/
PRINTA("::FFFF:%u.%u.%u.%u", addr->u8[12], addr->u8[13], addr->u8[14], addr->u8[15]);
} else {
for(i = 0, f = 0; i < sizeof(uip_ipaddr_t); i += 2) {
a = (addr->u8[i] << 8) + addr->u8[i + 1];
if(a == 0 && f >= 0) {
if(f++ == 0) {
PRINTA("::");
}
} else {
if(f > 0) {
f = -1;
} else if(i > 0) {
PRINTA(":");
}
PRINTA("%x", a);
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}
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}
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}
}
/*---------------------------------------------------------------------------*/