76 lines
3.1 KiB
C
76 lines
3.1 KiB
C
/*
|
|
* Copyright (c) 2011, Institute for Pervasive Computing, ETH Zurich
|
|
* 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
|
|
* CoAP module for observing resources
|
|
* \author
|
|
* Matthias Kovatsch <kovatsch@inf.ethz.ch>
|
|
*/
|
|
|
|
#ifndef COAP_OBSERVING_H_
|
|
#define COAP_OBSERVING_H_
|
|
|
|
#include "er-coap-03.h"
|
|
#include "er-coap-03-transactions.h"
|
|
|
|
#ifndef COAP_MAX_OBSERVERS
|
|
#define COAP_MAX_OBSERVERS 4
|
|
#endif /* COAP_MAX_OBSERVERS */
|
|
|
|
/* Interval in seconds in which NON notifies are changed to CON notifies to check client. */
|
|
#define COAP_OBSERVING_REFRESH_INTERVAL 60
|
|
|
|
#if COAP_MAX_OPEN_TRANSACTIONS<COAP_MAX_OBSERVERS
|
|
#warning "COAP_MAX_OPEN_TRANSACTIONS smaller than COAP_MAX_OBSERVERS: cannot handle CON notifications"
|
|
#endif
|
|
|
|
typedef struct coap_observer {
|
|
struct coap_observer *next; /* for LIST */
|
|
|
|
const char *url;
|
|
uip_ipaddr_t addr;
|
|
uint16_t port;
|
|
uint8_t token_len;
|
|
uint8_t token[COAP_TOKEN_LEN];
|
|
struct stimer refresh_timer;
|
|
} coap_observer_t;
|
|
|
|
list_t coap_get_observers(void);
|
|
coap_observer_t *coap_add_observer(const char *url, uip_ipaddr_t *addr, uint16_t port, const uint8_t *token, size_t token_len);
|
|
void coap_remove_observer(coap_observer_t *o);
|
|
int coap_remove_observer_by_client(uip_ipaddr_t *addr, uint16_t port);
|
|
int coap_remove_observer_by_token(uip_ipaddr_t *addr, uint16_t port, uint8_t *token, size_t token_len);
|
|
void coap_notify_observers(const char *url, int type, uint32_t observe, uint8_t *payload, size_t payload_len);
|
|
|
|
void coap_observe_handler(resource_t *resource, void *request, void *response);
|
|
|
|
#endif /* COAP_OBSERVING_H_ */
|