| /** |
| * @file |
| * MQTT client (private interface) |
| */ |
| |
| /* |
| * Copyright (c) 2016 Erik Andersson |
| * 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. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 lwIP TCP/IP stack. |
| * |
| * Author: Erik Andersson |
| * |
| */ |
| #ifndef LWIP_HDR_APPS_MQTT_PRIV_H |
| #define LWIP_HDR_APPS_MQTT_PRIV_H |
| |
| #include "lwip/apps/mqtt.h" |
| #include "lwip/altcp.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /** Pending request item, binds application callback to pending server requests */ |
| struct mqtt_request_t |
| { |
| /** Next item in list, NULL means this is the last in chain, |
| next pointing at itself means request is unallocated */ |
| struct mqtt_request_t *next; |
| /** Callback to upper layer */ |
| mqtt_request_cb_t cb; |
| void *arg; |
| /** MQTT packet identifier */ |
| u16_t pkt_id; |
| /** Expire time relative to element before this */ |
| u16_t timeout_diff; |
| }; |
| |
| /** Ring buffer */ |
| struct mqtt_ringbuf_t { |
| u16_t put; |
| u16_t get; |
| u8_t buf[MQTT_OUTPUT_RINGBUF_SIZE]; |
| }; |
| |
| /** MQTT client */ |
| struct mqtt_client_s |
| { |
| /** Timers and timeouts */ |
| u16_t cyclic_tick; |
| u16_t keep_alive; |
| u16_t server_watchdog; |
| /** Packet identifier generator*/ |
| u16_t pkt_id_seq; |
| /** Packet identifier of pending incoming publish */ |
| u16_t inpub_pkt_id; |
| /** Connection state */ |
| u8_t conn_state; |
| struct altcp_pcb *conn; |
| /** Connection callback */ |
| void *connect_arg; |
| mqtt_connection_cb_t connect_cb; |
| /** Pending requests to server */ |
| struct mqtt_request_t *pend_req_queue; |
| struct mqtt_request_t req_list[MQTT_REQ_MAX_IN_FLIGHT]; |
| void *inpub_arg; |
| /** Incoming data callback */ |
| mqtt_incoming_data_cb_t data_cb; |
| mqtt_incoming_publish_cb_t pub_cb; |
| /** Input */ |
| u32_t msg_idx; |
| u8_t rx_buffer[MQTT_VAR_HEADER_BUFFER_LEN]; |
| /** Output ring-buffer */ |
| struct mqtt_ringbuf_t output; |
| }; |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* LWIP_HDR_APPS_MQTT_PRIV_H */ |