91 lines
3.1 KiB
C
91 lines
3.1 KiB
C
/*
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* Copyright (c) 2011, Swedish Institute of Computer Science.
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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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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "contiki.h"
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#include "net/packetbuf.h"
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#define DEBUG DEBUG_NONE
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#include "net/uip-debug.h"
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/*---------------------------------------------------------------------------*/
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int
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packetutils_serialize_atts(uint8_t *data, int size)
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{
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int i;
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/* set the length first later */
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int pos = 1;
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int cnt = 0;
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/* assume that values are 16-bit */
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uint16_t val;
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PRINTF("packetutils: serializing packet atts");
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for(i = 0; i < PACKETBUF_NUM_ATTRS; i++) {
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val = packetbuf_attr(i);
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if(val != 0) {
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if(pos + 3 > size) {
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return -1;
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}
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data[pos++] = i;
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data[pos++] = val >> 8;
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data[pos++] = val & 255;
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cnt++;
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PRINTF(" %d=%d", i, val);
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}
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}
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PRINTF(" (%d)\n", cnt);
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data[0] = cnt;
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return pos;
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}
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/*---------------------------------------------------------------------------*/
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int
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packetutils_deserialize_atts(const uint8_t *data, int size)
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{
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int i, cnt, pos;
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pos = 0;
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cnt = data[pos++];
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PRINTF("packetutils: deserializing %d packet atts:", cnt);
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if(cnt > PACKETBUF_NUM_ATTRS) {
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PRINTF(" *** too many: %u!\n", PACKETBUF_NUM_ATTRS);
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return -1;
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}
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for(i = 0; i < cnt; i++) {
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if(data[pos] >= PACKETBUF_NUM_ATTRS) {
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/* illegal attribute identifier */
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PRINTF(" *** unknown attribute %u\n", data[pos]);
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return -1;
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}
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PRINTF(" %d=%d", data[pos], (data[pos + 1] << 8) | data[pos + 2]);
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packetbuf_set_attr(data[pos], (data[pos + 1] << 8) | data[pos + 2]);
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pos += 3;
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}
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PRINTF("\n");
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return pos;
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}
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/*---------------------------------------------------------------------------*/
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