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