| /* |
| * Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich |
| * 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 |
| * CoAP module for observing resources (draft-ietf-core-observe-11). |
| * \author |
| * Matthias Kovatsch <kovatsch@inf.ethz.ch> |
| */ |
| |
| #ifndef COAP_OBSERVE_H_ |
| #define COAP_OBSERVE_H_ |
| |
| #include "er-coap.h" |
| #include "er-coap-transactions.h" |
| #include <sys/stimer.h> |
| |
| #define COAP_OBSERVER_URL_LEN 20 |
| |
| typedef struct coap_observable { |
| uint32_t observe_clock; |
| struct stimer orphan_timer; |
| list_t observers; |
| coap_packet_t notification; |
| uint8_t buffer[COAP_MAX_PACKET_SIZE + 1]; |
| } coap_observable_t; |
| |
| typedef struct coap_observer { |
| struct coap_observer *next; /* for LIST */ |
| |
| char url[COAP_OBSERVER_URL_LEN]; |
| uip_ipaddr_t addr; |
| uint16_t port; |
| coap_context_t *coap_ctx; |
| uint8_t token_len; |
| uint8_t token[COAP_TOKEN_LEN]; |
| uint16_t last_mid; |
| |
| int32_t obs_counter; |
| |
| struct etimer retrans_timer; |
| uint8_t retrans_counter; |
| } coap_observer_t; |
| |
| list_t coap_get_observers(void); |
| |
| /* coap_observer_t *coap_add_observer(coap_context_t *coap_ctx, */ |
| /* uip_ipaddr_t *addr, uint16_t port, */ |
| /* const uint8_t *token, size_t token_len, */ |
| /* const char *url); */ |
| |
| void coap_remove_observer(coap_observer_t *o); |
| int coap_remove_observer_by_client(uip_ipaddr_t *addr, uint16_t port); |
| int coap_remove_observer_by_token(uip_ipaddr_t *addr, uint16_t port, |
| uint8_t *token, size_t token_len); |
| int coap_remove_observer_by_uri(const uip_ipaddr_t *addr, uint16_t port, |
| const char *uri); |
| int coap_remove_observer_by_mid(coap_context_t *coap_ctx, |
| uip_ipaddr_t *addr, uint16_t port, |
| uint16_t mid); |
| |
| void coap_notify_observers(resource_t *resource); |
| void coap_notify_observers_sub(resource_t *resource, char *subpath); |
| |
| void coap_observe_handler(resource_t *resource, void *request, |
| void *response); |
| |
| #endif /* COAP_OBSERVE_H_ */ |