coap-observe.h

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/*
 * Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich
 * All rights reserved.
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 * modification, are permitted provided that the following conditions
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 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
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 * 3. Neither the name of the Institute nor the names of its contributors
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 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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/**
 * \file
 *      CoAP module for observing resources (draft-ietf-core-observe-11).
 * \author
 *      Matthias Kovatsch <kovatsch@inf.ethz.ch>
 */
 
/**
 * \addtogroup coap
 * @{
 */
 
#ifndef COAP_OBSERVE_H_
#define COAP_OBSERVE_H_
 
#include "coap.h"
#include "coap-transactions.h"
#include "coap-engine.h"
 
typedef struct coap_observer {
  struct coap_observer *next;   /* for LIST */
 
  char url[COAP_OBSERVER_URL_LEN];
  coap_endpoint_t endpoint;
  uint8_t token_len;
  uint8_t token[COAP_TOKEN_LEN];
  uint16_t last_mid;
 
  int32_t obs_counter;
 
  coap_timer_t retrans_timer;
  uint8_t retrans_counter;
} coap_observer_t;
 
void coap_remove_observer(coap_observer_t *o);
int coap_remove_observer_by_client(const coap_endpoint_t *ep);
int coap_remove_observer_by_token(const coap_endpoint_t *ep,
                                  uint8_t *token, size_t token_len);
int coap_remove_observer_by_uri(const coap_endpoint_t *ep,
                                const char *uri);
int coap_remove_observer_by_mid(const coap_endpoint_t *ep,
                                uint16_t mid);
 
void coap_notify_observers(coap_resource_t *resource);
void coap_notify_observers_sub(coap_resource_t *resource, const char *subpath);
 
void coap_observe_handler(const coap_resource_t *resource,
                          coap_message_t *request,
                          coap_message_t *response);
 
uint8_t coap_has_observers(char *path);
 
#endif /* COAP_OBSERVE_H_ */
/** @} */