Changed FRAMER to return negative values for error to allow 0 size headers.
This commit is contained in:
Joakim Eriksson
Niclas Finne
parent
d89a4ef4fd
commit
65163a9b57
9 changed files with 239 additions and 23 deletions
213
examples/ipv6/native-border-router/border-router-rdc.c
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examples/ipv6/native-border-router/border-router-rdc.c
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/*
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* Copyright (c) 2010, 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: nullrdc.c,v 1.4 2010/11/23 18:11:00 nifi Exp $
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*/
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/**
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* \file
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* A null RDC implementation that uses framer for headers.
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* \author
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* Adam Dunkels <adam@sics.se>
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* Niclas Finne <nfi@sics.se>
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*/
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#include "net/packetbuf.h"
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#include "net/queuebuf.h"
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#include "net/netstack.h"
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#include <string.h>
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#include "packetbuf.h"
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#include "packetutils.h"
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#define DEBUG 1
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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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#define MAX_CALLBACKS 16
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static int callback_pos;
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/* a structure for calling back when packet data is coming back
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from radio... */
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struct tx_callback {
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mac_callback_t cback;
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int status;
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int tx;
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void *ptr;
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struct packetbuf_attr attr;
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struct packetbuf_addr addr;
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};
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static void send_callback(struct tx_callback *tx);
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static struct tx_callback callbacks[MAX_CALLBACKS];
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void packet_sent(uint8_t sessionid, uint8_t status, uint8_t tx)
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{
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if(sessionid < MAX_CALLBACKS) {
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struct tx_callback *callback;
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callback = &callbacks[sessionid];
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packetbuf_attr_copyfrom(&callback->attr, &callback->addr);
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callback->status = status;
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callback->tx = tx;
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send_callback(callback);
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} else {
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printf("*** ERROR: too high session id %d\n", sessionid);
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}
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}
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static int
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setup_callback(mac_callback_t sent, void *ptr)
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{
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int tmp = callback_pos;
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struct tx_callback *callback;
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callback = &callbacks[callback_pos];
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callback->cback = sent;
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callback->ptr = ptr;
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packetbuf_attr_copyto(&callback->attr, &callback->addr);
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callback_pos++;
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if(callback_pos >= MAX_CALLBACKS)
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callback_pos = 0;
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return tmp;
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}
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/*---------------------------------------------------------------------------*/
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static void
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send_packet(mac_callback_t sent, void *ptr)
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{
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int ret;
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packetbuf_set_addr(PACKETBUF_ADDR_SENDER, &rimeaddr_node_addr);
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/* ack or not ? */
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packetbuf_set_attr(PACKETBUF_ATTR_MAC_ACK, 1);
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if(NETSTACK_FRAMER.create() == FRAMER_FAILED) {
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/* Failed to allocate space for headers */
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PRINTF("br-rdc: send failed, too large header\n");
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ret = MAC_TX_ERR_FATAL;
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} else {
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int is_broadcast;
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uint8_t dsn;
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uint8_t sid;
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int size;
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uint8_t attbuf[64]; /* 3 bytes per attribute - hopefully enough with 64 */
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sid = setup_callback(sent, ptr);
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dsn = ((uint8_t *)packetbuf_hdrptr())[2] & 0xff;
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is_broadcast = rimeaddr_cmp(packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
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&rimeaddr_null);
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/* here we send the data over SLIP to the radio-chip */
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/* NETSTACK_RADIO.transmit(packetbuf_totlen())); */
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/* and store the "call" with a timeout - for fail and if success
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we just make a callback */
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/* TODO: store the call for later "ack" / feedback handling... */
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if((size = packetutils_serialize_atts(attbuf, sizeof(attbuf))) > 0) {
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/* alloc and copy attributes */
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packetbuf_hdralloc(size);
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memcpy(packetbuf_hdrptr(), attbuf, size);
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packetbuf_hdralloc(3);
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uint8_t *buf = (uint8_t *) packetbuf_hdrptr();
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buf[0] = '!';
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buf[1] = 'S';
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buf[2] = sid; /* sequence or session number for this packet */
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write_to_slip(packetbuf_hdrptr(), packetbuf_totlen());
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}
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}
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}
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/* */
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static void send_callback(struct tx_callback *tx)
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{
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mac_call_sent_callback(tx->cback, tx->ptr, tx->status, tx->tx);
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}
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/*---------------------------------------------------------------------------*/
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static void
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send_list(mac_callback_t sent, void *ptr, struct rdc_buf_list *buf_list)
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{
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if(buf_list != NULL) {
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queuebuf_to_packetbuf(buf_list->buf);
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send_packet(sent, ptr);
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}
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}
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/*---------------------------------------------------------------------------*/
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static void
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packet_input(void)
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{
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if(NETSTACK_FRAMER.parse() == FRAMER_FAILED) {
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PRINTF("br-rdc: failed to parse %u\n", packetbuf_datalen());
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} else {
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NETSTACK_MAC.input();
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}
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}
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/*---------------------------------------------------------------------------*/
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static int
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on(void)
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{
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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static int
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off(int keep_radio_on)
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{
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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static unsigned short
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channel_check_interval(void)
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{
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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static void
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init(void)
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{
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callback_pos = 0;
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}
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/*---------------------------------------------------------------------------*/
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const struct rdc_driver border_router_rdc_driver = {
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"br-rdc",
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init,
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send_packet,
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send_list,
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packet_input,
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on,
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off,
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channel_check_interval,
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};
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/*---------------------------------------------------------------------------*/
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