161 lines
5.3 KiB
C
161 lines
5.3 KiB
C
/**
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* \addtogroup rime
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* @{
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*/
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/**
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* \defgroup rimeipolite Ipolite best effort local broadcast
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* @{
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*
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* The ipolite module sends one local area broadcast packet within one
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* time interval. If a packet with the same header is received from a
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* neighbor within the interval, the packet is not sent.
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*
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* \section channels Channels
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*
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* The ipolite module uses 1 channel.
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*
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*/
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/*
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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: ipolite.h,v 1.6 2009/02/07 16:15:37 adamdunkels Exp $
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*/
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/**
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* \file
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* Header file for Ipolite best effort local Broadcast (ipolite)
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* \author
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* Adam Dunkels <adam@sics.se>
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*/
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#ifndef __IPOLITE_H__
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#define __IPOLITE_H__
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#include "net/rime/broadcast.h"
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#include "net/rime/ctimer.h"
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#include "net/rime/queuebuf.h"
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struct ipolite_conn;
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#define IPOLITE_ATTRIBUTES IBC_ATTRIBUTES
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/**
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* \brief A structure with callback functions for an ipolite connection.
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*
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* This structure holds a list of callback functions used
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* a an ipolite connection. The functions are called when
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* events occur on the connection.
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*
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*/
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struct ipolite_callbacks {
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/**
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* Called when a packet is received on the connection.
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*/
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void (* recv)(struct ipolite_conn *c, rimeaddr_t *from);
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/**
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* Called when a packet is sent on the connection.
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*/
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void (* sent)(struct ipolite_conn *c);
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/**
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* Called when a packet is dropped because a packet was heard from a
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* neighbor.
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*/
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void (* dropped)(struct ipolite_conn *c);
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};
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/**
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* An opaque structure with no user-visible elements that holds the
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* state of an ipolite connection,
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*/
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struct ipolite_conn {
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struct broadcast_conn c;
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const struct ipolite_callbacks *cb;
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struct ctimer t;
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struct queuebuf *q;
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uint8_t hdrsize;
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};
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/**
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* \brief Open an ipolite connection
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* \param c A pointer to a struct ipolite_conn.
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* \param channel The channel number to be used for this connection
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* \param cb A pointer to the callbacks used for this connection
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*
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* This function opens an ipolite connection on the
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* specified channel. The callbacks are called when a
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* packet is received, or when another event occurs on the
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* connection (see \ref "struct ipolite_callbacks").
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*/
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void ipolite_open(struct ipolite_conn *c, uint16_t channel,
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const struct ipolite_callbacks *cb);
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/**
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* \brief Close an ipolite connection
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* \param c A pointer to a struct ipolite_conn that has previously been opened with ipolite_open().
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*
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* This function closes an ipolite connection that has
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* previously been opened with ipolite_open().
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*/
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void ipolite_close(struct ipolite_conn *c);
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/**
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* \brief Send a packet on an ipolite connection.
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* \param c A pointer to a struct ipolite_conn that has previously been opened with ipolite_open().
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* \param interval The timer interval in which the packet should be sent.
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* \param hdrsize The size of the header that should be unique within the time interval.
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*
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* This function sends a packet from the rimebuf on the
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* ipolite connection. The packet is sent some time during
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* the time interval, but only if no other packet is
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* received with the same header.
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*
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*/
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int ipolite_send(struct ipolite_conn *c, clock_time_t interval,
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uint8_t hdrsize);
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/**
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* \brief Cancel a pending packet
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* \param c A pointer to a struct ipolite_conn that has previously been opened with ipolite_open().
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*
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* This function cancels a pending transmission that has
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* previously been started with ipolite_send().
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*/
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void ipolite_cancel(struct ipolite_conn *c);
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#endif /* __IPOLITE_H__ */
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/** @} */
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/** @} */
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