| /* |
| * 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 reliable transport |
| * \author |
| * Matthias Kovatsch <kovatsch@inf.ethz.ch> |
| */ |
| |
| #ifndef COAP_TRANSACTIONS_H_ |
| #define COAP_TRANSACTIONS_H_ |
| |
| #include "er-coap.h" |
| |
| /* |
| * Modulo mask (thus +1) for a random number to get the tick number for the random |
| * retransmission time between COAP_RESPONSE_TIMEOUT and COAP_RESPONSE_TIMEOUT*COAP_RESPONSE_RANDOM_FACTOR. |
| */ |
| #define COAP_RESPONSE_TIMEOUT_TICKS (CLOCK_SECOND * COAP_RESPONSE_TIMEOUT) |
| //#define COAP_RESPONSE_TIMEOUT_BACKOFF_MASK (long)((CLOCK_SECOND * COAP_RESPONSE_TIMEOUT * ((float)COAP_RESPONSE_RANDOM_FACTOR - 1.0)) + 0.5) + 1 |
| /* Convert to use integer arithmetics */ |
| #define COAP_RESPONSE_TIMEOUT_BACKOFF_MASK \ |
| (long)((CLOCK_SECOND * COAP_RESPONSE_TIMEOUT * \ |
| (COAP_RESPONSE_RANDOM_FACTOR_INT - 10)) + 5) / 10 + 1 |
| |
| /* container for transactions with message buffer and retransmission info */ |
| typedef struct coap_transaction { |
| struct coap_transaction *next; /* for LIST */ |
| |
| uint16_t mid; |
| struct etimer retrans_timer; |
| uint8_t retrans_counter; |
| |
| uip_ipaddr_t addr; |
| uint16_t port; |
| coap_context_t *coap_ctx; |
| |
| restful_response_handler callback; |
| void *callback_data; |
| |
| uint16_t packet_len; |
| uint8_t packet[COAP_MAX_PACKET_SIZE + 1]; /* +1 for the terminating '\0' which will not be sent |
| * Use snprintf(buf, len+1, "", ...) to completely fill payload */ |
| } coap_transaction_t; |
| |
| void coap_register_as_transaction_handler(); |
| |
| coap_transaction_t *coap_new_transaction(uint16_t mid, coap_context_t *coap_ctx, |
| uip_ipaddr_t *addr, uint16_t port); |
| void coap_send_transaction(coap_transaction_t *t); |
| void coap_clear_transaction(coap_transaction_t *t); |
| coap_transaction_t *coap_get_transaction_by_mid(uint16_t mid); |
| |
| void coap_check_transactions(); |
| |
| #endif /* COAP_TRANSACTIONS_H_ */ |