94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
/*******************************************************************************
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* Copyright (c) 2014 IBM Corp.
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*
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* and Eclipse Distribution License v1.0 which accompany this distribution.
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*
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* The Eclipse Public License is available at
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* http://www.eclipse.org/legal/epl-v10.html
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* and the Eclipse Distribution License is available at
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* http://www.eclipse.org/org/documents/edl-v10.php.
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*
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* Contributors:
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* Allan Stockdill-Mander/Ian Craggs - initial API and implementation and/or initial documentation
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*******************************************************************************/
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#ifndef __MQTT_CLIENT_C_
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#define __MQTT_CLIENT_C_
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#include "printf.h"
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#include "MQTTPacket.h"
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#include "MQTTLinux.h" //Platform specific implementation header file
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#define MAX_PACKET_ID 65535
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#define MAX_MESSAGE_HANDLERS 20
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enum QoS { QOS0, QOS1, QOS2 };
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// all failure return codes must be negative
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enum returnCode { BUFFER_OVERFLOW = -2, FAILURE = -1, SUCCESS = 0 };
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void NewTimer(Timer *);
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typedef struct MQTTMessage MQTTMessage;
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typedef struct MessageData MessageData;
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struct MQTTMessage {
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enum QoS qos;
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char retained;
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char dup;
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unsigned short id;
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void *payload;
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size_t payloadlen;
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};
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struct MessageData {
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MQTTMessage *message;
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MQTTString *topicName;
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};
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typedef void (*messageHandler)(MessageData *);
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typedef struct Client Client;
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int MQTTConnect(Client *, MQTTPacket_connectData *);
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int MQTTPublish(Client *, const char *, MQTTMessage *);
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int MQTTSubscribe(Client *, const char *, enum QoS, messageHandler);
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int MQTTUnsubscribe(Client *, const char *);
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int MQTTDisconnect(Client *);
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int MQTTYield(Client *, int);
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void setDefaultMessageHandler(Client *, messageHandler);
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void MQTTClient(Client *, Network *, unsigned int, unsigned char *, size_t, unsigned char *, size_t);
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struct Client {
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unsigned int next_packetid;
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unsigned int command_timeout_ms;
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size_t buf_size, readbuf_size;
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unsigned char *buf;
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unsigned char *readbuf;
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unsigned int keepAliveInterval;
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char ping_outstanding;
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char wait_pong;
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char isconnected;
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struct MessageHandlers {
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const char *topicFilter;
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void (*fp)(MessageData *);
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} messageHandlers[MAX_MESSAGE_HANDLERS]; // Message handlers are indexed by subscription topic
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void (*defaultMessageHandler)(MessageData *);
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Network *ipstack;
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Timer ping_timer;
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Timer pong_timer;
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OS_MUTEX send_mutex;
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};
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#define DefaultClient {0, 0, 0, 0, NULL, NULL, 0, 0, 0}
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#endif
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