151 lines
5.5 KiB
C
151 lines
5.5 KiB
C
/** \addtogroup apps
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* @{ */
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/**
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* \defgroup servreghack A service registration and diseemination hack
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* @{
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*
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* This application is a quick'n'dirty hack for registering,
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* disseminating, and looking up services. A service is identified by
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* an 8-bit integer between 1 and 255. Integers below 128 are reserved
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* for system services.
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*
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* A service is registered with the function
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* servreg_hack_register(). Registered services will be transmitted to
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* all neighbors that run the servreg-hack application. These will in
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* turn resend the registration to their neighbors.
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*
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* Services from neighbors are stored in a local table. Services
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* stored in the table can be looked up using a combination of the
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* servreg_hack_list() and servreg_hack_item_match() functions.
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*
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*/
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/*
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* Copyright (c) 2010, 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 servreg-hack application
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* \author
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* Adam Dunkels <adam@sics.se>
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*/
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#ifndef SERVREG_HACK_H
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#define SERVREG_HACK_H
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#include "contiki-conf.h"
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#include "net/ip/uip.h"
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typedef uint8_t servreg_hack_id_t;
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typedef void servreg_hack_item_t;
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/**
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* \brief Initialize and start the servreg-hack application
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*
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* This function initializes and starts the servreg-hack
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* application and daemon.
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*/
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void servreg_hack_init(void);
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/**
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* \brief Register that this node provides a service
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* \param service_id The 8-bit ID for the service
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* \param addr The address associated with the service
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*
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* This function is used to register a
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* service. Registering a service means that other nodes
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* in the network will become aware that this node
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* provides this service. The servreg-hack application
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* does not specify what this service means, nor does it
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* provide any mechanism by which the service can be
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* reached: this is up to the application that uses the
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* servreg-hack application.
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*/
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void servreg_hack_register(servreg_hack_id_t service_id, const uip_ipaddr_t *addr);
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/**
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* \brief Get the IP address of a node offering a service
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* \param service_id The service ID of the service
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* \return A pointer to the IP address of the node, or NULL if the service was not known
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*
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* This function returns the address of the node offering
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* a specific service. If the service is not known, the
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* function returns NULL. If there are more than one nodes
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* offering the service, this function returns the address
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* of the node that most recently announced its service.
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*
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* To get a list of all nodes offering a specific service,
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* use the servreg_hack_list_head() function to get the
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* full list of offered services.
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*/
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uip_ipaddr_t * servreg_hack_lookup(servreg_hack_id_t service_id);
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/**
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* \brief Obtain the list of services provided by neighbors
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* \return The list of services
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*
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* This function returns a list of services registered by
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* other nodes. To find a specific service, the caller
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* needs to iterate through the list and check each list
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* item with the servreg_hack_item_match() function.
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*/
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servreg_hack_item_t *servreg_hack_list_head(void);
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/**
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* \brief Get the service ID for a list item
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* \param item The list item
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* \return The service ID for a list item
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*
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* This function is used when iterating through the list
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* of registered services.
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*/
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servreg_hack_id_t servreg_hack_item_id(servreg_hack_item_t *item);
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/**
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* \brief Get the IP address for a list item
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* \param item The list item
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* \return The IP address
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*
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* This function is used when iterating through the list
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* of registered services.
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*/
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uip_ipaddr_t * servreg_hack_item_address(servreg_hack_item_t *item);
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#endif /* SERVREG_HACK_H */
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/** @} */
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/** @} */
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