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

103 lines
3.4 KiB
C

/**
* \addtogroup rime
* @{
*/
/**
* \defgroup rimermh Best-effort multihop forwarding
* @{
*
* The rmh module implements a multihop forwarding mechanism. Routes
* must have already been setup with the route_add() function. Setting
* up routes is done with another Rime module such as the \ref
* routediscovery "route-discovery module".
*
* The hop-by-hop reliable multi-hop unciast primitive is similar to
* the best-effot multi-hop unicast primitive except that it uses the
* reliable single-hop primitive for the communication between two
* single-hop neighbors.
*
* \section channels Channels
*
* The rmh module uses 1 channel.
*
*/
/*
* 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
* Multihop forwarding header file
* \author
* Adam Dunkels <adam@sics.se>
*/
#ifndef RMH_H_
#define RMH_H_
#include "net/rime/runicast.h"
#include "net/linkaddr.h"
struct rmh_conn;
#define RMH_ATTRIBUTES { PACKET_ADDR_ESENDER, PACKET_ADDRSIZE }, \
{ PACKET_ADDR_ERECEIVER, PACKET_ADDRSIZE }, \
{ PACKET_ATTR_TTL, PACKET_ATTR_BIT * 5 }, \
{ PACKET_ATTR_MAX_REXMIT, PACKET_ATTR_BIT * 5 }, \
RUC_ATTRIBUTES
struct rmh_callbacks {
void (* recv)(struct rmh_conn *ptr, linkaddr_t *sender, uint8_t hops);
linkaddr_t *(* forward)(struct rmh_conn *ptr,
const linkaddr_t *originator,
const linkaddr_t *dest,
const linkaddr_t *prevhop,
uint8_t hops);
};
struct rmh_conn {
struct runicast_conn c;
const struct rmh_callbacks *cb;
uint8_t num_rexmit;
};
void rmh_open(struct rmh_conn *c, uint16_t channel,
const struct rmh_callbacks *u);
void rmh_close(struct rmh_conn *c);
int rmh_send(struct rmh_conn *c, linkaddr_t *to, uint8_t num_rexmit,
uint8_t max_hops);
#endif /* RMH_H_ */
/** @} */
/** @} */