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

147 lines
4.9 KiB
C

/**
* \addtogroup rime
* @{
*/
/**
* \defgroup rimemesh Mesh routing
* @{
*
* The mesh module sends packets using multi-hop routing to a specified
* receiver somewhere in the network.
*
*
* \section channels Channels
*
* The mesh module uses 3 channel; one for the multi-hop forwarding
* (\ref rimemultihop "multihop") and two for the route disovery (\ref
* routediscovery "route-discovery").
*
*/
/*
* 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 Rime mesh routing protocol
* \author
* Adam Dunkels <adam@sics.se>
*/
#ifndef MESH_H_
#define MESH_H_
#include "net/queuebuf.h"
#include "net/rime/multihop.h"
#include "net/rime/route-discovery.h"
struct mesh_conn;
/**
* \brief Mesh callbacks
*/
struct mesh_callbacks {
/** Called when a packet is received. */
void (* recv)(struct mesh_conn *c, const rimeaddr_t *from, uint8_t hops);
/** Called when a packet, sent with mesh_send(), is actually transmitted. */
void (* sent)(struct mesh_conn *c);
/** Called when a packet, sent with mesh_send(), times out and is dropped. */
void (* timedout)(struct mesh_conn *c);
};
struct mesh_conn {
struct multihop_conn multihop;
struct route_discovery_conn route_discovery_conn;
struct queuebuf *queued_data;
rimeaddr_t queued_data_dest;
const struct mesh_callbacks *cb;
};
/**
* \brief Open a mesh connection
* \param c A pointer to a struct mesh_conn
* \param channels The channels on which the connection will operate; mesh uses 3 channels
* \param callbacks Pointer to callback structure
*
* This function sets up a mesh connection on the
* specified channel. The caller must have allocated the
* memory for the struct mesh_conn, usually by declaring it
* as a static variable.
*
* The struct mesh_callbacks pointer must point to a structure
* containing function pointers to functions that will be called
* when a packet arrives on the channel.
*
*/
void mesh_open(struct mesh_conn *c, uint16_t channels,
const struct mesh_callbacks *callbacks);
/**
* \brief Close an mesh connection
* \param c A pointer to a struct mesh_conn
*
* This function closes an mesh connection that has
* previously been opened with mesh_open().
*
* This function typically is called as an exit handler.
*
*/
void mesh_close(struct mesh_conn *c);
/**
* \brief Send a mesh packet
* \param c The mesh connection on which the packet should be sent
* \param dest The address of the final destination of the packet
* \retval Non-zero if the packet could be queued for sending, zero otherwise
*
* This function sends a mesh packet. The packet must be
* present in the packetbuf before this function is called.
*
* The parameter c must point to an abc connection that
* must have previously been set up with mesh_open().
*
*/
int mesh_send(struct mesh_conn *c, const rimeaddr_t *dest);
/**
* \brief Test if mesh is ready to send a packet (or packet is queued)
* \param c The mesh connection on which is to be tested
* \retval 0 Packet queued
* \retval !0 Ready
*/
int mesh_ready(struct mesh_conn *c);
#endif /* MESH_H_ */
/** @} */
/** @} */