coap_subscribe_internal.h

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/*
 * coap_subscribe_internal.h -- Structures, Enums & Functions that are not
 * exposed to application programming
 *
 * Copyright (C) 2010-2022 Olaf Bergmann <bergmann@tzi.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * This file is part of the CoAP library libcoap. Please see README for terms
 * of use.
 */
 
#ifndef COAP_SUBSCRIBE_INTERNAL_H_
#define COAP_SUBSCRIBE_INTERNAL_H_
 
#include "coap_internal.h"
 
#if COAP_SERVER_SUPPORT
 
#ifndef COAP_OBS_MAX_NON
#define COAP_OBS_MAX_NON   5
#endif /* COAP_OBS_MAX_NON */
#if COAP_OBS_MAX_NON > 255
#error COAP_OBS_MAX_NON is too large
#endif /* COAP_OBS_MAX_NON > 255 */
 
#ifndef COAP_OBS_MAX_FAIL
#define COAP_OBS_MAX_FAIL  1
#endif /* COAP_OBS_MAX_FAIL */
#if COAP_OBS_MAX_FAIL > 255
#error COAP_OBS_MAX_FAIL is too large
#endif /* COAP_OBS_MAX_FAIL > 255 */
 
struct coap_subscription_t {
  struct coap_subscription_t *next; 
  struct coap_session_t *session;   
  uint8_t non_cnt;  
  uint8_t fail_cnt; 
  uint8_t dirty;    
  coap_cache_key_t *cache_key; 
  coap_pdu_t *pdu;         
};
 
void coap_subscription_init(coap_subscription_t *);
 
void
coap_handle_failed_notify(coap_context_t *context,
                          coap_session_t *session,
                          const coap_binary_t *token);
 
void coap_check_notify(coap_context_t *context);
 
coap_subscription_t *coap_add_observer(coap_resource_t *resource,
                                       coap_session_t *session,
                                       const coap_binary_t *token,
                                       const coap_pdu_t *pdu);
 
coap_subscription_t *coap_find_observer(coap_resource_t *resource,
                                        coap_session_t *session,
                                        const coap_binary_t *token);
 
void coap_touch_observer(coap_context_t *context,
                         coap_session_t *session,
                         const coap_binary_t *token);
 
int coap_delete_observer(coap_resource_t *resource,
                         coap_session_t *session,
                         const coap_binary_t *token);
 
void coap_delete_observers(coap_context_t *context, coap_session_t *session);
 
#endif /* COAP_SERVER_SUPPORT */
#endif /* COAP_SUBSCRIBE_INTERNAL_H_ */