coap_layers_internal.h

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/*
 * coap_layers_internal.h -- Internal layer functions for libcoap
 *
 * Copyright (C) 2023-2024 Jon Shallow <supjps-libcoap@jpshallow.com>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * This file is part of the CoAP library libcoap. Please see README for terms
 * of use.
 */

 
#ifndef COAP_LAYERS_INTERNAL_H_
#define COAP_LAYERS_INTERNAL_H_
 
#include "coap_internal.h"
 
typedef enum {
  COAP_LAYER_SESSION,
  COAP_LAYER_WS,
  COAP_LAYER_TLS,
  COAP_LAYER_LAST
} coap_layer_t;

typedef ssize_t (*coap_layer_read_t)(coap_session_t *session,
                                     uint8_t *data, size_t datalen);

typedef ssize_t (*coap_layer_write_t)(coap_session_t *session,
                                      const uint8_t *data, size_t datalen);
typedef void (*coap_layer_establish_t)(coap_session_t *session);

typedef void (*coap_layer_close_t)(coap_session_t *session);
 
typedef struct {
  coap_layer_read_t l_read;   /* Get data from next layer (TCP) */
  coap_layer_write_t l_write; /* Output data to next layer */
  coap_layer_establish_t l_establish; /* Layer establish */
  coap_layer_close_t l_close; /* Connection close */
} coap_layer_func_t;
 
extern coap_layer_func_t coap_layers_coap[COAP_PROTO_LAST][COAP_LAYER_LAST];
 
#endif /* COAP_LAYERS_INTERNAL_H_ */