/*
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* Copyright (c) 2006, 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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*/
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/**
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* \file
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* Reliable unicast bulk transfer
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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/rucb.h"
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#include "net/rime.h"
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#include <string.h>
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#define MAX_TRANSMISSIONS 8
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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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#include "sys/timetable.h"
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/*---------------------------------------------------------------------------*/
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static int
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read_data(struct rucb_conn *c)
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{
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int len = 0;
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packetbuf_clear();
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if(c->u->read_chunk) {
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len = c->u->read_chunk(c, c->chunk * RUCB_DATASIZE,
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packetbuf_dataptr(), RUCB_DATASIZE);
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}
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packetbuf_set_datalen(len);
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return len;
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}
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/*---------------------------------------------------------------------------*/
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static void
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acked(struct runicast_conn *ruc, const rimeaddr_t *to, uint8_t retransmissions)
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{
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struct rucb_conn *c = (struct rucb_conn *)ruc;
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int len;
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PRINTF("%d.%d: rucb acked\n",
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rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1]);
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c->chunk++;
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len = read_data(c);
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if(len == 0 && c->last_size == 0) {
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/* Nothing more to do */
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return;
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}
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if(len >= 0) {
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runicast_send(&c->c, &c->receiver, MAX_TRANSMISSIONS);
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c->last_size = len;
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/* {
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extern struct timetable cc2420_timetable;
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timetable_print(&cc2420_timetable);
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}*/
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}
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}
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/*---------------------------------------------------------------------------*/
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static void
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timedout(struct runicast_conn *ruc, const rimeaddr_t *to, uint8_t retransmissions)
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{
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struct rucb_conn *c = (struct rucb_conn *)ruc;
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PRINTF("%d.%d: rucb timedout\n",
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rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1]);
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if(c->u->timedout) {
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c->u->timedout(c);
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}
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}
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/*---------------------------------------------------------------------------*/
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static void
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recv(struct runicast_conn *ruc, const rimeaddr_t *from, uint8_t seqno)
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{
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struct rucb_conn *c = (struct rucb_conn *)ruc;
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PRINTF("%d.%d: rucb: recv from %d.%d len %d\n",
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rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1],
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from->u8[0], from->u8[1], packetbuf_totlen());
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if(seqno == c->last_seqno) {
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return;
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}
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c->last_seqno = seqno;
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if(rimeaddr_cmp(&c->sender, &rimeaddr_null)) {
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rimeaddr_copy(&c->sender, from);
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c->u->write_chunk(c, 0, RUCB_FLAG_NEWFILE, packetbuf_dataptr(), 0);
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c->chunk = 0;
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}
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if(rimeaddr_cmp(&c->sender, from)) {
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int datalen = packetbuf_datalen();
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if(datalen < RUCB_DATASIZE) {
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PRINTF("%d.%d: get %d bytes, file complete\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
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datalen);
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c->u->write_chunk(c, c->chunk * RUCB_DATASIZE,
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RUCB_FLAG_LASTCHUNK, packetbuf_dataptr(), datalen);
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} else {
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c->u->write_chunk(c, c->chunk * RUCB_DATASIZE,
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RUCB_FLAG_NONE, packetbuf_dataptr(), datalen);
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}
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c->chunk++;
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}
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if(packetbuf_datalen() < RUCB_DATASIZE) {
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rimeaddr_copy(&c->sender, &rimeaddr_null);
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}
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}
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/*---------------------------------------------------------------------------*/
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static const struct runicast_callbacks ruc = {recv, acked, timedout};
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/*---------------------------------------------------------------------------*/
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void
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rucb_open(struct rucb_conn *c, uint16_t channel,
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const struct rucb_callbacks *u)
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{
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rimeaddr_copy(&c->sender, &rimeaddr_null);
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runicast_open(&c->c, channel, &ruc);
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c->u = u;
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c->last_seqno = -1;
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c->last_size = -1;
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}
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/*---------------------------------------------------------------------------*/
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void
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rucb_close(struct rucb_conn *c)
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{
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runicast_close(&c->c);
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}
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/*---------------------------------------------------------------------------*/
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int
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rucb_send(struct rucb_conn *c, const rimeaddr_t *receiver)
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{
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c->chunk = 0;
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read_data(c);
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rimeaddr_copy(&c->receiver, receiver);
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rimeaddr_copy(&c->sender, &rimeaddr_node_addr);
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runicast_send(&c->c, receiver, MAX_TRANSMISSIONS);
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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