122 lines
4.7 KiB
C
122 lines
4.7 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2014, Daniele Alessandrelli.
|
||
|
|
* 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
|
||
|
|
* Extension to Erbium for enabling CoAP observe clients
|
||
|
|
* \author
|
||
|
|
* Daniele Alessandrelli <daniele.alessandrelli@gmail.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef COAP_OBSERVING_CLIENT_H_
|
||
|
|
#define COAP_OBSERVING_CLIENT_H_
|
||
|
|
|
||
|
|
#include "er-coap.h"
|
||
|
|
#include "er-coap-transactions.h"
|
||
|
|
|
||
|
|
#ifndef COAP_OBSERVE_CLIENT
|
||
|
|
#define COAP_OBSERVE_CLIENT 0
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef COAP_CONF_MAX_OBSERVEES
|
||
|
|
#define COAP_MAX_OBSERVEES COAP_CONF_MAX_OBSERVEES
|
||
|
|
#else
|
||
|
|
#define COAP_MAX_OBSERVEES 4
|
||
|
|
#endif /* COAP_CONF_MAX_OBSERVEES */
|
||
|
|
|
||
|
|
#if COAP_MAX_OPEN_TRANSACTIONS < COAP_MAX_OBSERVEES
|
||
|
|
#warning "COAP_MAX_OPEN_TRANSACTIONS smaller than COAP_MAX_OBSERVEES: " \
|
||
|
|
"this may be a problem"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define IS_RESPONSE_CODE_2_XX(message) (64 < message->code \
|
||
|
|
&& message->code < 128)
|
||
|
|
|
||
|
|
/*----------------------------------------------------------------------------*/
|
||
|
|
typedef enum {
|
||
|
|
OBSERVE_OK,
|
||
|
|
NOTIFICATION_OK,
|
||
|
|
OBSERVE_NOT_SUPPORTED,
|
||
|
|
ERROR_RESPONSE_CODE,
|
||
|
|
NO_REPLY_FROM_SERVER,
|
||
|
|
} coap_notification_flag_t;
|
||
|
|
|
||
|
|
/*----------------------------------------------------------------------------*/
|
||
|
|
typedef struct coap_observee_s coap_observee_t;
|
||
|
|
|
||
|
|
typedef void (*notification_callback_t)(coap_observee_t *subject,
|
||
|
|
void *notification,
|
||
|
|
coap_notification_flag_t);
|
||
|
|
|
||
|
|
struct coap_observee_s {
|
||
|
|
coap_observee_t *next; /* for LIST */
|
||
|
|
uip_ipaddr_t addr;
|
||
|
|
uint16_t port;
|
||
|
|
const char *url;
|
||
|
|
uint8_t token_len;
|
||
|
|
uint8_t token[COAP_TOKEN_LEN];
|
||
|
|
void *data; /* generic pointer for storing user data */
|
||
|
|
notification_callback_t notification_callback;
|
||
|
|
uint32_t last_observe;
|
||
|
|
};
|
||
|
|
|
||
|
|
/*----------------------------------------------------------------------------*/
|
||
|
|
coap_observee_t *coap_obs_add_observee(uip_ipaddr_t *addr, uint16_t port,
|
||
|
|
const uint8_t *token, size_t token_len,
|
||
|
|
const char *url,
|
||
|
|
notification_callback_t
|
||
|
|
notification_callback, void *data);
|
||
|
|
|
||
|
|
void coap_obs_remove_observee(coap_observee_t *o);
|
||
|
|
|
||
|
|
coap_observee_t *coap_obs_get_observee_by_token(const uint8_t *token,
|
||
|
|
size_t token_len);
|
||
|
|
|
||
|
|
int coap_obs_remove_observee_by_token(uip_ipaddr_t *addr, uint16_t port,
|
||
|
|
uint8_t *token, size_t token_len);
|
||
|
|
|
||
|
|
int coap_obs_remove_observee_by_url(uip_ipaddr_t *addr, uint16_t port,
|
||
|
|
const char *url);
|
||
|
|
|
||
|
|
void coap_handle_notification(uip_ipaddr_t *, uint16_t port,
|
||
|
|
coap_packet_t *notification);
|
||
|
|
|
||
|
|
coap_observee_t *coap_obs_request_registration(uip_ipaddr_t *addr,
|
||
|
|
uint16_t port, char *uri,
|
||
|
|
notification_callback_t
|
||
|
|
notification_callback,
|
||
|
|
void *data);
|
||
|
|
/* TODO: this function may be moved to er-coap.c */
|
||
|
|
uint8_t coap_generate_token(uint8_t **token_ptr);
|
||
|
|
|
||
|
|
#endif /* COAP_OBSERVING_CLIENT_H_ */
|