nes-proj/core/net/rime/chameleon.c

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/*
* Copyright (c) 2007, 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.
*
* This file is part of the Contiki operating system.
*
* $Id: chameleon.c,v 1.9 2010/02/23 18:29:53 adamdunkels Exp $
*/
/**
* \file
* Chameleon, Rime's header processing module
* \author
* Adam Dunkels <adam@sics.se>
*/
#include "net/rime/chameleon.h"
#include "net/rime/channel.h"
#include "net/rime.h"
#include "lib/list.h"
#include <stdio.h>
static const struct chameleon_module *header_module;
#define DEBUG 0
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
/*---------------------------------------------------------------------------*/
void
chameleon_init(const struct chameleon_module *m)
{
header_module = m;
channel_init();
}
/*---------------------------------------------------------------------------*/
#if DEBUG
static void
printbin(int n, int digits)
{
int i;
char output[128];
for(i = 0; i < digits; ++i) {
output[digits - i - 1] = (n & 1) + '0';
n >>= 1;
}
output[i] = 0;
printf(output);
}
static void
printhdr(uint8_t *hdr, int len)
{
int i, j;
j = 0;
for(i = 0; i < len; ++i) {
printbin(hdr[i], 8);
printf(" (0x%0x), ", hdr[i]);
++j;
if(j == 10) {
printf("\n");
j = 0;
}
}
if(j != 0) {
printf("\n");
}
}
#endif /* DEBUG */
/*---------------------------------------------------------------------------*/
struct channel *
chameleon_parse(void)
{
struct channel *c = NULL;
PRINTF("%d.%d: chameleon_input\n",
rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1]);
#if DEBUG
printhdr(packetbuf_dataptr(), packetbuf_datalen());
#endif /* DEBUG */
if(header_module) {
c = header_module->input();
if(c != NULL) {
PRINTF("%d.%d: chameleon_input channel %d\n",
rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1],
c->channelno);
packetbuf_set_attr(PACKETBUF_ATTR_CHANNEL, c->channelno);
} else {
PRINTF("%d.%d: chameleon_input channel not found for incoming packet\n",
rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1]);
}
}
return c;
}
/*---------------------------------------------------------------------------*/
int
chameleon_create(struct channel *c)
{
int ret;
PRINTF("%d.%d: chameleon_output channel %d\n",
rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1],
c->channelno);
if(header_module) {
ret = header_module->output(c);
packetbuf_set_attr(PACKETBUF_ATTR_CHANNEL, c->channelno);
#if DEBUG
printhdr(packetbuf_hdrptr(), packetbuf_hdrlen());
#endif /* DEBUG */
if(ret) {
return 1;
}
}
return 0;
}
/*---------------------------------------------------------------------------*/
int
chameleon_hdrsize(const struct packetbuf_attrlist attrlist[])
{
if(header_module != NULL &&
header_module->hdrsize != NULL) {
return header_module->hdrsize(attrlist);
} else {
return 0;
}
}
/*---------------------------------------------------------------------------*/