coap-observe.h

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/*
 * Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich
 * All rights reserved.
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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(coap_resource_t *resource, coap_message_t *request,
                          coap_message_t *response);

uint8_t coap_has_observers(char *path);

#endif /* COAP_OBSERVE_H_ */
/** @} */