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architecture for the Rime stack for Contiki. The Chameleon architecture separates the header processing from the Rime protocol logic. Instead of having each protocol create its own part of the packet header, protocols use packet attributes. Before sending a packet, a special Chameleon header processing module creates a packet header from the packet attributes. The same Chameleon module parses incoming packets and creates packet attributes from the header. The details are in our SenSys 2007 paper: Adam Dunkels, Fredrik Osterlind, Zhitao He. An Adaptive Communication Architecture for Wireless Sensor Networks. In Proceedings of the Fifth ACM Conference on Networked Embedded Sensor Systems (SenSys 2007), Sydney, Australia, November 2007. http://www.sics.se/~adam/dunkels07adaptive.pdf This is a rewrite of the code that was developed for the paper.
148 lines
4.1 KiB
C
148 lines
4.1 KiB
C
/*
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* Copyright (c) 2007, 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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* This file is part of the Contiki operating system.
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*
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* $Id: chameleon.c,v 1.1 2008/02/25 02:14:34 adamdunkels Exp $
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*/
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/**
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* \file
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* Chameleon, Rime's header processing module
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* \author
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* Adam Dunkels <adam@sics.se>
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*/
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#include "net/rime/chameleon.h"
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#include "net/rime/channel.h"
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#include "net/rime.h"
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#include "lib/list.h"
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#include <stdio.h>
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static const struct chameleon_module *header_module;
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#define DEBUG 0
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#if DEBUG
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#include <stdio.h>
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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/*---------------------------------------------------------------------------*/
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void
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chameleon_init(const struct chameleon_module *m)
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{
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header_module = m;
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channel_init();
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}
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/*---------------------------------------------------------------------------*/
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static void
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printbin(int n, int digits)
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{
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int i;
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char output[128];
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for(i = 0; i < digits; ++i) {
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output[digits - i - 1] = (n & 1) + '0';
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n >>= 1;
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}
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output[i] = 0;
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printf(output);
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}
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static void
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printhdr(uint8_t *hdr, int len)
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{
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int i, j;
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j = 0;
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for(i = 0; i < len; ++i) {
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printbin(hdr[i], 8);
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printf(" (0x%0x), ", hdr[i]);
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++j;
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if(j == 10) {
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printf("\n");
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j = 0;
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}
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}
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if(j != 0) {
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printf("\n");
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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chameleon_input(void)
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{
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struct channel *c;
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PRINTF("%d.%d: chameleon_input\n",
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rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1]);
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printhdr(rimebuf_dataptr(), rimebuf_datalen());
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c = header_module->input();
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if(c != NULL) {
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PRINTF("%d.%d: chameleon_input channel %d\n",
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rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1],
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c->channelno);
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abc_input(c);
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} else {
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PRINTF("%d.%d: chameleon_input channel not found for incoming packet\n",
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rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1]);
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}
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}
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/*---------------------------------------------------------------------------*/
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int
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chameleon_output(struct channel *c)
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{
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int ret;
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PRINTF("%d.%d: chameleon_output channel %d\n",
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rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1],
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c->channelno);
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ret = header_module->output(c);
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rimebuf_set_attr(RIMEBUF_ATTR_CHANNEL, c->channelno);
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printhdr(rimebuf_hdrptr(), rimebuf_hdrlen());
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if(ret) {
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rime_output();
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return 1;
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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int
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chameleon_hdrsize(const struct rimebuf_attrlist attrlist[])
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{
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return header_module->hdrsize(attrlist);
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}
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/*---------------------------------------------------------------------------*/
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