osd-contiki/core/net/rime/abc.h
2007-03-25 12:05:51 +00:00

135 lines
4.4 KiB
C

/**
* \addtogroup rime
* @{
*/
/**
* \defgroup rime_abc Anonymous best-effort local area broadcast (abc)
* @{
*
* The abc module sends packets to all local area neighbors without
* any extra headers that idendtify the sender or receiver.
*/
/*
* 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.
*
* $Id: abc.h,v 1.8 2007/03/25 12:05:51 adamdunkels Exp $
*/
/**
* \file
* Header file for the Rime module Anonymous BroadCast (abc)
* \author
* Adam Dunkels <adam@sics.se>
*/
#ifndef __ABC_H__
#define __ABC_H__
#include "contiki-net.h"
#include "net/rime/rimebuf.h"
struct abc_conn;
/**
* \brief Callback structure for abc
*
*/
struct abc_callbacks {
/** Called when a packet has been received by the abc module. */
void (* recv)(struct abc_conn *ptr);
};
struct abc_conn {
struct abc_conn *next;
u16_t channel;
const struct abc_callbacks *u;
};
/**
* \brief Set up an anonymous best-effort broadcast connection
* \param c A pointer to a struct abc_conn
* \param channel The channel on which the connection will operate
* \param u A struct abc_callbacks with function pointers to functions that will be called when a packet has been received
*
* This function sets up an abc connection on the
* specified channel. The caller must have allocated the
* memory for the struct abc_conn, usually by declaring it
* as a static variable.
*
* The struct abc_callbacks pointer must point to a structure
* containing a pointer to a function that will be called
* when a packet arrives on the channel.
*
*/
void abc_open(struct abc_conn *c, u16_t channel,
const struct abc_callbacks *u);
/**
* \brief Close an abc connection
* \param c A pointer to a struct abc_conn
*
* This function closes an abc connection that has
* previously been opened with abc_open().
*
* This function typically is called as an exit handler.
*
*/
void abc_close(struct abc_conn *c);
/**
* \brief Send an anonymous best-effort broadcast packet
* \param c The abc connection on which the packet should be sent
* \retval Non-zero if the packet could be sent, zero otherwise
*
* This function sends an anonymous best-effort broadcast
* packet. The packet must be present in the rimebuf
* before this function is called.
*
* The parameter c must point to an abc connection that
* must have previously been set up with abc_open().
*
*/
int abc_send(struct abc_conn *c);
/**
* \brief Internal Rime function: Pass a packet to the abc layer
*
* This function is used internally by Rime to pass
* packets to the abc layer. Should never be called
* directly.
*
*/
void abc_input_packet(void);
#endif /* __BC_H__ */
/** @} */
/** @} */