text: /*
   * 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
   * \author
   *         Nicolas Tsiftes <nvt@sics.se>
   *         Niclas Finne <nfi@sics.se>
   *         Joakim Eriksson <joakime@sics.se>
   */
  
  #include "net/ip/uip-debug.h"
  #include "net/ip/ip64-addr.h"
  
  /*---------------------------------------------------------------------------*/
  void
  uip_debug_ipaddr_print(const uip_ipaddr_t *addr)
  {
  #if NETSTACK_CONF_WITH_IPV6
    uint16_t a;
    unsigned int i;
    int f;
  #endif /* NETSTACK_CONF_WITH_IPV6 */
    if(addr == NULL) {
      PRINTA("(NULL IP addr)");
      return;
    }
  #if NETSTACK_CONF_WITH_IPV6
    if(ip64_addr_is_ipv4_mapped_addr(addr)) {
      /*
       * Printing IPv4-mapped addresses is done according to RFC 3513 [1]
       *
       *     "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
       *     IPv4 representation)."
       *
       * [1] https://tools.ietf.org/html/rfc3513#page-5
       */
      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);
        }
  	}
    }
  #else /* NETSTACK_CONF_WITH_IPV6 */
    PRINTA("%u.%u.%u.%u", addr->u8[0], addr->u8[1], addr->u8[2], addr->u8[3]);
  #endif /* NETSTACK_CONF_WITH_IPV6 */
  }
  /*---------------------------------------------------------------------------*/
  