osd-contiki/core/net/rime/rudolph0.h

123 lines
3.6 KiB
C

/**
* \addtogroup rime
* @{
*/
/**
* \defgroup rudolph0 Single-hop reliable bulk data transfer (rudolph0)
* @{
*
* The rudolph0 module implements a single-hop reliable bulk data
* transfer mechanism.
*
* \section channels Channels
*
* The rudolph0 module uses 2 channels; one for data packets and one
* for NACK and repair packets.
*
*/
/*
* 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.
*
*/
/**
* \file
* Header file for the single-hop reliable bulk data transfer module
* \author
* Adam Dunkels <adam@sics.se>
*/
#ifndef RUDOLPH0_H_
#define RUDOLPH0_H_
#include "net/rime/stbroadcast.h"
#include "net/rime/polite.h"
struct rudolph0_conn;
enum {
RUDOLPH0_FLAG_NONE,
RUDOLPH0_FLAG_NEWFILE,
RUDOLPH0_FLAG_LASTCHUNK,
};
struct rudolph0_callbacks {
void (* write_chunk)(struct rudolph0_conn *c, int offset, int flag,
uint8_t *data, int len);
int (* read_chunk)(struct rudolph0_conn *c, int offset, uint8_t *to,
int maxsize);
};
#ifdef RUDOLPH0_CONF_DATASIZE
#define RUDOLPH0_DATASIZE RUDOLPH0_CONF_DATASIZE
#else
#define RUDOLPH0_DATASIZE 64
#endif
struct rudolph0_hdr {
uint8_t type;
uint8_t version;
uint16_t chunk;
};
struct rudolph0_datapacket {
struct rudolph0_hdr h;
uint8_t datalen;
uint8_t data[RUDOLPH0_DATASIZE];
};
struct rudolph0_conn {
struct stbroadcast_conn c;
struct polite_conn nackc;
const struct rudolph0_callbacks *cb;
clock_time_t send_interval;
uint8_t state;
struct rudolph0_datapacket current;
};
void rudolph0_open(struct rudolph0_conn *c, uint16_t channel,
const struct rudolph0_callbacks *cb);
void rudolph0_close(struct rudolph0_conn *c);
void rudolph0_send(struct rudolph0_conn *c, clock_time_t interval);
void rudolph0_stop(struct rudolph0_conn *c);
/* Force the sender to restart sending the file from the start. */
void rudolph0_force_restart(struct rudolph0_conn *c);
void rudolph0_set_version(struct rudolph0_conn *c, int version);
int rudolph0_version(struct rudolph0_conn *c);
#endif /* RUDOLPH0_H_ */
/** @} */
/** @} */