text: /*
   * Copyright (c) 2011, 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.
   */
  
  #include "contiki.h"
  #include "net/packetbuf.h"
  #define DEBUG DEBUG_NONE
  #include "net/ipv6/uip-debug.h"
  
  /*---------------------------------------------------------------------------*/
  int
  packetutils_serialize_atts(uint8_t *data, int size)
  {
    int i;
    /* set the length first later */
    int pos = 1;
    int cnt = 0;
    /* assume that values are 16-bit */
    uint16_t val;
    PRINTF("packetutils: serializing packet atts");
    for(i = 0; i < PACKETBUF_NUM_ATTRS; i++) {
      val = packetbuf_attr(i);
      if(val != 0) {
        if(pos + 3 > size) {
          return -1;
        }
        data[pos++] = i;
        data[pos++] = val >> 8;
        data[pos++] = val & 255;
        cnt++;
        PRINTF(" %d=%d", i, val);
      }
    }
    PRINTF(" (%d)\n", cnt);
  
    data[0] = cnt;
    return pos;
  }
  /*---------------------------------------------------------------------------*/
  int
  packetutils_deserialize_atts(const uint8_t *data, int size)
  {
    int i, cnt, pos;
  
    pos = 0;
    cnt = data[pos++];
    PRINTF("packetutils: deserializing %d packet atts:", cnt);
    if(cnt > PACKETBUF_NUM_ATTRS) {
      PRINTF(" *** too many: %u!\n", PACKETBUF_NUM_ATTRS);
      return -1;
    }
    for(i = 0; i < cnt; i++) {
      if(data[pos] >= PACKETBUF_NUM_ATTRS) {
        /* illegal attribute identifier */
        PRINTF(" *** unknown attribute %u\n", data[pos]);
        return -1;
      }
      PRINTF(" %d=%d", data[pos], (data[pos + 1] << 8) | data[pos + 2]);
      packetbuf_set_attr(data[pos], (data[pos + 1] << 8) | data[pos + 2]);
      pos += 3;
    }
    PRINTF("\n");
    return pos;
  }
  /*---------------------------------------------------------------------------*/
  