nes-proj/core/net/rime/stunicast.h

113 lines
3.9 KiB
C

/*
* Copyright (c) 2006, 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
* Stubborn unicast header file
* \author
* Adam Dunkels <adam@sics.se>
*/
/**
* \addtogroup rime
* @{
*/
/**
* \defgroup rimestunicast Stubborn unicast
* @{
*
* The stubborn single-hop unicast primitive (stunicast) repeatedly
* sends a packet to a single-hop neighbor using the unicast
* primitive. The stunicast primitive sends and resends the packet
* until an upper layer primitive or protocol cancels the
* transmission. While it is possible for applications and protocols
* that use Rime to use the stubborn single-hop unicast primitive
* directly, the stunicast primitive is primarily used by the reliable
* single-hop unicast (runicast) primitive.
*
* Before the stunicast primitive sends a packet, it allocates a queue
* buffer, to which the application data and packet attributes is
* copied, and sets a timer. When the timer expires, the stunicast
* primitive copies the queue buffer to the Rime buffer and sends the
* packet using the unicast primitive. The stunicast primitive sets the
* number of retransmissions for a packet as a packet attribute on
* outgoing packets.
*
* \section stunicast-channels Channels
*
* The stunicast module uses 1 channel.
*
*/
#ifndef STUNICAST_H_
#define STUNICAST_H_
#include "sys/ctimer.h"
#include "net/rime/unicast.h"
#include "net/queuebuf.h"
struct stunicast_conn;
#define STUNICAST_ATTRIBUTES UNICAST_ATTRIBUTES
struct stunicast_callbacks {
void (* recv)(struct stunicast_conn *c, const linkaddr_t *from);
void (* sent)(struct stunicast_conn *c, int status, int num_tx);
};
struct stunicast_conn {
struct unicast_conn c;
struct ctimer t;
struct queuebuf *buf;
const struct stunicast_callbacks *u;
linkaddr_t receiver;
};
void stunicast_open(struct stunicast_conn *c, uint16_t channel,
const struct stunicast_callbacks *u);
void stunicast_close(struct stunicast_conn *c);
int stunicast_send_stubborn(struct stunicast_conn *c, const linkaddr_t *receiver,
clock_time_t rxmittime);
void stunicast_cancel(struct stunicast_conn *c);
int stunicast_send(struct stunicast_conn *c, const linkaddr_t *receiver);
void stunicast_set_timer(struct stunicast_conn *c, clock_time_t t);
linkaddr_t *stunicast_receiver(struct stunicast_conn *c);
#endif /* STUNICAST_H_ */
/** @} */
/** @} */