188 lines
6.2 KiB
C
188 lines
6.2 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-raw.c,v 1.3 2008/07/03 21:34:12 adamdunkels Exp $
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*/
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/**
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* \file
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* A Chameleon module that produces non-optimized headers
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* \author
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* Adam Dunkels <adam@sics.se>
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*/
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#include <string.h>
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#include "net/rime/chameleon.h"
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#include "net/rime.h"
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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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struct raw_hdr {
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uint16_t channel;
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};
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/*---------------------------------------------------------------------------*/
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static struct channel *
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input(void)
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{
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const struct rimebuf_attrlist *a;
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int byteptr, bitptr, len;
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uint8_t *hdrptr;
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struct raw_hdr *hdr;
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struct channel *c;
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/* The packet has a header that tells us what channel the packet is
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for. */
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hdr = (struct raw_hdr *)rimebuf_dataptr();
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rimebuf_hdrreduce(sizeof(struct raw_hdr));
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c = channel_lookup(hdr->channel);
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if(c == NULL) {
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PRINTF("chameleon-raw: input: channel %d not found\n", hdr->channel);
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return NULL;
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}
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rimebuf_attr_clear();
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hdrptr = rimebuf_dataptr();
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rimebuf_hdrreduce(c->hdrsize);
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byteptr = bitptr = 0;
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for(a = c->attrlist; a->type != RIMEBUF_ATTR_NONE; ++a) {
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PRINTF("%d.%d: unpack_header type %s, len %d\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
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rimebuf_attr_strings[a->type], a->len);
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len = (a->len & 0xf8) + ((a->len & 7) ? 8: 0);
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if(a->type == RIMEBUF_ADDR_SENDER ||
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a->type == RIMEBUF_ADDR_RECEIVER ||
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a->type == RIMEBUF_ADDR_ESENDER ||
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a->type == RIMEBUF_ADDR_ERECEIVER) {
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const rimeaddr_t addr;
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memcpy((uint8_t *)&addr, &hdrptr[byteptr], len / 8);
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PRINTF("%d.%d: unpack_header type %s, addr %d.%d\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
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rimebuf_attr_strings[a->type],
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addr.u8[0], addr.u8[1]);
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rimebuf_set_addr(a->type, &addr);
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} else {
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rimebuf_attr_t val = 0;
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memcpy((uint8_t *)&val, &hdrptr[byteptr], len / 8);
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rimebuf_set_attr(a->type, val);
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PRINTF("%d.%d: unpack_header type %s, val %d\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
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rimebuf_attr_strings[a->type],
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val);
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}
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byteptr += len / 8;
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}
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return c;
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}
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/*---------------------------------------------------------------------------*/
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static int
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output(struct channel *c)
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{
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const struct rimebuf_attrlist *a;
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int byteptr, len;
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uint8_t *hdrptr;
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struct raw_hdr *hdr;
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/* Compute the total size of the final header by summing the size of
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all attributes that are used on this channel. */
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rimebuf_hdralloc(c->hdrsize);
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hdrptr = rimebuf_hdrptr();
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byteptr = 0;
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for(a = c->attrlist; a->type != RIMEBUF_ATTR_NONE; ++a) {
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PRINTF("%d.%d: pack_header type %s, len %d\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
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rimebuf_attr_strings[a->type], a->len);
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len = (a->len & 0xf8) + ((a->len & 7) ? 8: 0);
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if(a->type == RIMEBUF_ADDR_SENDER ||
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a->type == RIMEBUF_ADDR_RECEIVER ||
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a->type == RIMEBUF_ADDR_ESENDER ||
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a->type == RIMEBUF_ADDR_ERECEIVER) {
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const rimeaddr_t *rimeaddr;
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/* memcpy(&hdrptr[byteptr], (uint8_t *)rimebuf_attr_aget(a->type), len / 8);*/
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rimeaddr = rimebuf_addr(a->type);
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hdrptr[byteptr] = rimeaddr->u8[0];
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hdrptr[byteptr + 1] = rimeaddr->u8[1];
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PRINTF("%d.%d: address %d.%d\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
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((uint8_t *)rimebuf_addr(a->type))[0],
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((uint8_t *)rimebuf_addr(a->type))[1]);
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} else {
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rimebuf_attr_t val;
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val = rimebuf_attr(a->type);
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hdrptr[byteptr] = rimebuf_attr(a->type);
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PRINTF("%d.%d: value %d\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
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val);
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}
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byteptr += len / 8;
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}
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rimebuf_hdralloc(sizeof(struct raw_hdr));
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hdr = (struct raw_hdr *)rimebuf_hdrptr();
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hdr->channel = c->channelno;
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return 1; /* Send out packet */
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}
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/*---------------------------------------------------------------------------*/
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static int
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hdrsize(const struct rimebuf_attrlist *a)
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{
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int size, len;
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/* Compute the total size of the final header by summing the size of
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all attributes that are used on this channel. */
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size = 0;
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for(; a->type != RIMEBUF_ATTR_NONE; ++a) {
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/* PRINTF("chameleon header_size: header type %s (%d) len %d\n",
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rimebuf_attr_strings[a->type],
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a->type,
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a->len);*/
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len = a->len;
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if(len < 8) {
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len = 8;
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}
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size += len;
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}
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return size / 8;
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}
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/*---------------------------------------------------------------------------*/
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CC_CONST_FUNCTION struct chameleon_module chameleon_raw = { input, output,
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hdrsize, NULL };
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