james kang / MQTT_JS

Provides Javascript wrappers for MQTT.

Dependencies:   mbed-http DEVI2C_JS MQTTPacket FP

MQTT/MQTTAsync.h@1:a8ffffd1beab, 2020-02-03 (annotated)

Committer:
kajasu
Date:
Mon Feb 03 09:36:20 2020 +0000
Revision:
1:a8ffffd1beab
Parent:
0:f4dbe435e64c 
TT

Who changed what in which revision?

UserRevisionLine numberNew contents of line
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 1 /*******************************************************************************
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 2 * Copyright (c) 2014 IBM Corp.
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 3 *
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 4 * All rights reserved. This program and the accompanying materials
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 5 * are made available under the terms of the Eclipse Public License v1.0
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 6 * and Eclipse Distribution License v1.0 which accompany this distribution.
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 7 *
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 8 * The Eclipse Public License is available at
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 9 * http://www.eclipse.org/legal/epl-v10.html
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 10 * and the Eclipse Distribution License is available at
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 11 * http://www.eclipse.org/org/documents/edl-v10.php.
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 12 *
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 13 * Contributors:
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 14 * Ian Craggs - initial API and implementation and/or initial documentation
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 15 *******************************************************************************/
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 16
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 17 #if !defined(MQTTASYNC_H)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 18 #define MQTTASYNC_H
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 19
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 20 #include "FP.h"
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 21 #include "MQTTPacket.h"
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 22 #include "stdio.h"
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 23
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 24 namespace MQTT
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 25 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 26
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 27
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 28 enum QoS { QOS0, QOS1, QOS2 };
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 29
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 30
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 31 struct Message
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 32 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 33 enum QoS qos;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 34 bool retained;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 35 bool dup;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 36 unsigned short id;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 37 void *payload;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 38 size_t payloadlen;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 39 };
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 40
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 41
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 42 class PacketId
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 43 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 44 public:
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 45 PacketId();
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 46
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 47 int getNext();
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 48
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 49 private:
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 50 static const int MAX_PACKET_ID = 65535;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 51 int next;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 52 };
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 53
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 54 typedef void (*messageHandler)(Message*);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 55
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 56 typedef struct limits
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 57 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 58 int MAX_MQTT_PACKET_SIZE; //
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 59 int MAX_MESSAGE_HANDLERS; // each subscription requires a message handler
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 60 int MAX_CONCURRENT_OPERATIONS; // each command which runs concurrently can have a result handler, when we are in multi-threaded mode
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 61 int command_timeout_ms;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 62
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 63 limits()
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 64 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 65 MAX_MQTT_PACKET_SIZE = 100;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 66 MAX_MESSAGE_HANDLERS = 5;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 67 MAX_CONCURRENT_OPERATIONS = 1; // 1 indicates single-threaded mode - set to >1 for multithreaded mode
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 68 command_timeout_ms = 30000;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 69 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 70 } Limits;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 71
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 72
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 73 /**
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 74 * @class Async
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 75 * @brief non-blocking, threaded MQTT client API
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 76 * @param Network a network class which supports send, receive
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 77 * @param Timer a timer class with the methods:
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 78 */
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 79 template<class Network, class Timer, class Thread, class Mutex> class Async
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 80 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 81
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 82 public:
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 83
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 84 struct Result
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 85 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 86 /* success or failure result data */
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 87 Async<Network, Timer, Thread, Mutex>* client;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 88 int rc;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 89 };
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 90
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 91 typedef void (*resultHandler)(Result*);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 92
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 93 Async(Network* network, const Limits limits = Limits());
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 94
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 95 typedef struct
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 96 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 97 Async* client;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 98 Network* network;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 99 } connectionLostInfo;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 100
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 101 typedef int (*connectionLostHandlers)(connectionLostInfo*);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 102
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 103 /** Set the connection lost callback - called whenever the connection is lost and we should be connected
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 104 * @param clh - pointer to the callback function
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 105 */
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 106 void setConnectionLostHandler(connectionLostHandlers clh)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 107 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 108 connectionLostHandler.attach(clh);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 109 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 110
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 111 /** Set the default message handling callback - used for any message which does not match a subscription message handler
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 112 * @param mh - pointer to the callback function
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 113 */
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 114 void setDefaultMessageHandler(messageHandler mh)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 115 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 116 defaultMessageHandler.attach(mh);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 117 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 118
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 119 int connect(resultHandler fn, MQTTPacket_connectData* options = 0);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 120
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 121 template<class T>
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 122 int connect(void(T::*method)(Result *), MQTTPacket_connectData* options = 0, T *item = 0); // alternative to pass in pointer to member function
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 123
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 124 int publish(resultHandler rh, const char* topic, Message* message);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 125
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 126 int subscribe(resultHandler rh, const char* topicFilter, enum QoS qos, messageHandler mh);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 127
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 128 int unsubscribe(resultHandler rh, const char* topicFilter);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 129
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 130 int disconnect(resultHandler rh);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 131
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 132 private:
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 133
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 134 void run(void const *argument);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 135 int cycle(int timeout);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 136 int waitfor(int packet_type, Timer& atimer);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 137 int keepalive();
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 138 int findFreeOperation();
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 139
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 140 int decodePacket(int* value, int timeout);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 141 int readPacket(int timeout);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 142 int sendPacket(int length, int timeout);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 143 int deliverMessage(MQTTString* topic, Message* message);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 144
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 145 Thread* thread;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 146 Network* ipstack;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 147
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 148 Limits limits;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 149
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 150 char* buf;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 151 char* readbuf;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 152
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 153 Timer ping_timer, connect_timer;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 154 unsigned int keepAliveInterval;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 155 bool ping_outstanding;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 156
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 157 PacketId packetid;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 158
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 159 typedef FP<void, Result*> resultHandlerFP;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 160 resultHandlerFP connectHandler;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 161
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 162 typedef FP<void, Message*> messageHandlerFP;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 163 struct MessageHandlers
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 164 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 165 const char* topic;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 166 messageHandlerFP fp;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 167 } *messageHandlers; // Message handlers are indexed by subscription topic
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 168
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 169 // how many concurrent operations should we allow? Each one will require a function pointer
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 170 struct Operations
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 171 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 172 unsigned short id;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 173 resultHandlerFP fp;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 174 const char* topic; // if this is a publish, store topic name in case republishing is required
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 175 Message* message; // for publish,
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 176 Timer timer; // to check if the command has timed out
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 177 } *operations; // result handlers are indexed by packet ids
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 178
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 179 static void threadfn(void* arg);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 180
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 181 messageHandlerFP defaultMessageHandler;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 182
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 183 typedef FP<int, connectionLostInfo*> connectionLostFP;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 184
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 185 connectionLostFP connectionLostHandler;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 186
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 187 };
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 188
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 189 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 190
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 191
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 192 template<class Network, class Timer, class Thread, class Mutex> void MQTT::Async<Network, Timer, Thread, Mutex>::threadfn(void* arg)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 193 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 194 ((Async<Network, Timer, Thread, Mutex>*) arg)->run(NULL);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 195 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 196
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 197
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 198 template<class Network, class Timer, class Thread, class Mutex> MQTT::Async<Network, Timer, Thread, Mutex>::Async(Network* network, Limits limits) : limits(limits), packetid()
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 199 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 200 this->thread = 0;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 201 this->ipstack = network;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 202 this->ping_timer = Timer();
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 203 this->ping_outstanding = 0;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 204
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 205 // How to make these memory allocations portable? I was hoping to avoid the heap
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 206 buf = new char[limits.MAX_MQTT_PACKET_SIZE];
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 207 readbuf = new char[limits.MAX_MQTT_PACKET_SIZE];
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 208 this->operations = new struct Operations[limits.MAX_CONCURRENT_OPERATIONS];
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 209 for (int i = 0; i < limits.MAX_CONCURRENT_OPERATIONS; ++i)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 210 operations[i].id = 0;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 211 this->messageHandlers = new struct MessageHandlers[limits.MAX_MESSAGE_HANDLERS];
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 212 for (int i = 0; i < limits.MAX_MESSAGE_HANDLERS; ++i)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 213 messageHandlers[i].topic = 0;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 214 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 215
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 216
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 217 template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::sendPacket(int length, int timeout)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 218 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 219 int sent = 0;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 220
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 221 while (sent < length)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 222 sent += ipstack->write(&buf[sent], length, timeout);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 223 if (sent == length)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 224 ping_timer.countdown(this->keepAliveInterval); // record the fact that we have successfully sent the packet
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 225 return sent;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 226 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 227
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 228
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 229 template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::decodePacket(int* value, int timeout)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 230 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 231 char c;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 232 int multiplier = 1;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 233 int len = 0;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 234 const int MAX_NO_OF_REMAINING_LENGTH_BYTES = 4;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 235
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 236 *value = 0;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 237 do
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 238 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 239 int rc = MQTTPACKET_READ_ERROR;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 240
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 241 if (++len > MAX_NO_OF_REMAINING_LENGTH_BYTES)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 242 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 243 rc = MQTTPACKET_READ_ERROR; /* bad data */
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 244 goto exit;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 245 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 246 rc = ipstack->read(&c, 1, timeout);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 247 if (rc != 1)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 248 goto exit;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 249 *value += (c & 127) * multiplier;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 250 multiplier *= 128;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 251 } while ((c & 128) != 0);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 252 exit:
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 253 return len;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 254 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 255
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 256
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 257 /**
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 258 * If any read fails in this method, then we should disconnect from the network, as on reconnect
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 259 * the packets can be retried.
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 260 * @param timeout the max time to wait for the packet read to complete, in milliseconds
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 261 * @return the MQTT packet type, or -1 if none
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 262 */
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 263 template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::readPacket(int timeout)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 264 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 265 int rc = -1;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 266 MQTTHeader header = {0};
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 267 int len = 0;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 268 int rem_len = 0;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 269
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 270 /* 1. read the header byte. This has the packet type in it */
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 271 if (ipstack->read(readbuf, 1, timeout) != 1)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 272 goto exit;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 273
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 274 len = 1;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 275 /* 2. read the remaining length. This is variable in itself */
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 276 decodePacket(&rem_len, timeout);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 277 len += MQTTPacket_encode(readbuf + 1, rem_len); /* put the original remaining length back into the buffer */
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 278
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 279 /* 3. read the rest of the buffer using a callback to supply the rest of the data */
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 280 if (ipstack->read(readbuf + len, rem_len, timeout) != rem_len)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 281 goto exit;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 282
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 283 header.byte = readbuf[0];
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 284 rc = header.bits.type;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 285 exit:
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 286 return rc;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 287 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 288
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 289
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 290 template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::deliverMessage(MQTTString* topic, Message* message)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 291 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 292 int rc = -1;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 293
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 294 // we have to find the right message handler - indexed by topic
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 295 for (int i = 0; i < limits.MAX_MESSAGE_HANDLERS; ++i)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 296 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 297 if (messageHandlers[i].topic != 0 && MQTTPacket_equals(topic, (char*)messageHandlers[i].topic))
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 298 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 299 messageHandlers[i].fp(message);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 300 rc = 0;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 301 break;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 302 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 303 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 304
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 305 return rc;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 306 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 307
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 308
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 309
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 310 template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::cycle(int timeout)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 311 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 312 /* get one piece of work off the wire and one pass through */
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 313
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 314 // read the socket, see what work is due
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 315 int packet_type = readPacket(timeout);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 316
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 317 int len, rc;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 318 switch (packet_type)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 319 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 320 case CONNACK:
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 321 if (this->thread)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 322 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 323 Result res = {this, 0};
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 324 if (MQTTDeserialize_connack(&res.rc, readbuf, limits.MAX_MQTT_PACKET_SIZE) == 1)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 325 ;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 326 connectHandler(&res);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 327 connectHandler.detach(); // only invoke the callback once
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 328 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 329 break;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 330 case PUBACK:
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 331 if (this->thread)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 332 ; //call resultHandler
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 333 case SUBACK:
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 334 break;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 335 case PUBLISH:
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 336 MQTTString topicName;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 337 Message msg;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 338 rc = MQTTDeserialize_publish((int*)&msg.dup, (int*)&msg.qos, (int*)&msg.retained, (int*)&msg.id, &topicName,
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 339 (char**)&msg.payload, (int*)&msg.payloadlen, readbuf, limits.MAX_MQTT_PACKET_SIZE);;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 340 if (msg.qos == QOS0)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 341 deliverMessage(&topicName, &msg);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 342 break;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 343 case PUBREC:
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 344 int type, dup, mypacketid;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 345 if (MQTTDeserialize_ack(&type, &dup, &mypacketid, readbuf, limits.MAX_MQTT_PACKET_SIZE) == 1)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 346 ;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 347 // must lock this access against the application thread, if we are multi-threaded
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 348 len = MQTTSerialize_ack(buf, limits.MAX_MQTT_PACKET_SIZE, PUBREL, 0, mypacketid);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 349 rc = sendPacket(len, timeout); // send the PUBREL packet
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 350 if (rc != len)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 351 goto exit; // there was a problem
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 352
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 353 break;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 354 case PUBCOMP:
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 355 break;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 356 case PINGRESP:
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 357 ping_outstanding = false;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 358 break;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 359 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 360 keepalive();
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 361 exit:
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 362 return packet_type;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 363 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 364
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 365
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 366 template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::keepalive()
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 367 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 368 int rc = 0;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 369
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 370 if (keepAliveInterval == 0)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 371 goto exit;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 372
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 373 if (ping_timer.expired())
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 374 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 375 if (ping_outstanding)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 376 rc = -1;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 377 else
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 378 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 379 int len = MQTTSerialize_pingreq(buf, limits.MAX_MQTT_PACKET_SIZE);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 380 rc = sendPacket(len, 1000); // send the ping packet
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 381 if (rc != len)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 382 rc = -1; // indicate there's a problem
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 383 else
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 384 ping_outstanding = true;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 385 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 386 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 387
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 388 exit:
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 389 return rc;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 390 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 391
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 392
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 393 template<class Network, class Timer, class Thread, class Mutex> void MQTT::Async<Network, Timer, Thread, Mutex>::run(void const *argument)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 394 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 395 while (true)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 396 cycle(ping_timer.left_ms());
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 397 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 398
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 399
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 400 // only used in single-threaded mode where one command at a time is in process
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 401 template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::waitfor(int packet_type, Timer& atimer)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 402 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 403 int rc = -1;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 404
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 405 do
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 406 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 407 if (atimer.expired())
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 408 break; // we timed out
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 409 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 410 while ((rc = cycle(atimer.left_ms())) != packet_type);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 411
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 412 return rc;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 413 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 414
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 415
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 416 template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::connect(resultHandler resultHandler, MQTTPacket_connectData* options)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 417 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 418 connect_timer.countdown(limits.command_timeout_ms);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 419
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 420 MQTTPacket_connectData default_options = MQTTPacket_connectData_initializer;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 421 if (options == 0)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 422 options = &default_options; // set default options if none were supplied
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 423
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 424 this->keepAliveInterval = options->keepAliveInterval;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 425 ping_timer.countdown(this->keepAliveInterval);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 426 int len = MQTTSerialize_connect(buf, limits.MAX_MQTT_PACKET_SIZE, options);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 427 int rc = sendPacket(len, connect_timer.left_ms()); // send the connect packet
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 428 if (rc != len)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 429 goto exit; // there was a problem
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 430
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 431 if (resultHandler == 0) // wait until the connack is received
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 432 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 433 // this will be a blocking call, wait for the connack
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 434 if (waitfor(CONNACK, connect_timer) == CONNACK)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 435 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 436 int connack_rc = -1;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 437 if (MQTTDeserialize_connack(&connack_rc, readbuf, limits.MAX_MQTT_PACKET_SIZE) == 1)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 438 rc = connack_rc;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 439 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 440 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 441 else
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 442 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 443 // set connect response callback function
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 444 connectHandler.attach(resultHandler);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 445
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 446 // start background thread
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 447 this->thread = new Thread((void (*)(void const *argument))&MQTT::Async<Network, Timer, Thread, Mutex>::threadfn, (void*)this);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 448 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 449
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 450 exit:
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 451 return rc;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 452 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 453
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 454
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 455 template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::findFreeOperation()
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 456 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 457 int found = -1;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 458 for (int i = 0; i < limits.MAX_CONCURRENT_OPERATIONS; ++i)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 459 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 460 if (operations[i].id == 0)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 461 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 462 found = i;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 463 break;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 464 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 465 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 466 return found;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 467 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 468
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 469
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 470 template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::subscribe(resultHandler resultHandler, const char* topicFilter, enum QoS qos, messageHandler messageHandler)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 471 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 472 int index = 0;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 473 if (this->thread)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 474 index = findFreeOperation();
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 475 Timer& atimer = operations[index].timer;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 476
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 477 atimer.countdown(limits.command_timeout_ms);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 478 MQTTString topic = {(char*)topicFilter, 0, 0};
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 479
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 480 int len = MQTTSerialize_subscribe(buf, limits.MAX_MQTT_PACKET_SIZE, 0, packetid.getNext(), 1, &topic, (int*)&qos);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 481 int rc = sendPacket(len, atimer.left_ms()); // send the subscribe packet
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 482 if (rc != len)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 483 goto exit; // there was a problem
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 484
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 485 /* wait for suback */
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 486 if (resultHandler == 0)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 487 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 488 // this will block
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 489 if (waitfor(SUBACK, atimer) == SUBACK)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 490 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 491 int count = 0, grantedQoS = -1, mypacketid;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 492 if (MQTTDeserialize_suback(&mypacketid, 1, &count, &grantedQoS, readbuf, limits.MAX_MQTT_PACKET_SIZE) == 1)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 493 rc = grantedQoS; // 0, 1, 2 or 0x80
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 494 if (rc != 0x80)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 495 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 496 for (int i = 0; i < limits.MAX_MESSAGE_HANDLERS; ++i)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 497 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 498 if (messageHandlers[i].topic == 0)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 499 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 500 messageHandlers[i].topic = topicFilter;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 501 messageHandlers[i].fp.attach(messageHandler);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 502 rc = 0;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 503 break;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 504 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 505 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 506 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 507 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 508 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 509 else
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 510 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 511 // set subscribe response callback function
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 512
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 513 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 514
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 515 exit:
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 516 return rc;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 517 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 518
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 519
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 520 template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::unsubscribe(resultHandler resultHandler, const char* topicFilter)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 521 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 522 int index = 0;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 523 if (this->thread)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 524 index = findFreeOperation();
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 525 Timer& atimer = operations[index].timer;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 526
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 527 atimer.countdown(limits.command_timeout_ms);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 528 MQTTString topic = {(char*)topicFilter, 0, 0};
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 529
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 530 int len = MQTTSerialize_unsubscribe(buf, limits.MAX_MQTT_PACKET_SIZE, 0, packetid.getNext(), 1, &topic);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 531 int rc = sendPacket(len, atimer.left_ms()); // send the subscribe packet
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 532 if (rc != len)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 533 goto exit; // there was a problem
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 534
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 535 // set unsubscribe response callback function
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 536
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 537
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 538 exit:
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 539 return rc;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 540 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 541
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 542
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 543
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 544 template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::publish(resultHandler resultHandler, const char* topicName, Message* message)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 545 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 546 int index = 0;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 547 if (this->thread)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 548 index = findFreeOperation();
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 549 Timer& atimer = operations[index].timer;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 550
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 551 atimer.countdown(limits.command_timeout_ms);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 552 MQTTString topic = {(char*)topicName, 0, 0};
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 553
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 554 if (message->qos == QOS1 || message->qos == QOS2)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 555 message->id = packetid.getNext();
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 556
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 557 int len = MQTTSerialize_publish(buf, limits.MAX_MQTT_PACKET_SIZE, 0, message->qos, message->retained, message->id, topic, (char*)message->payload, message->payloadlen);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 558 int rc = sendPacket(len, atimer.left_ms()); // send the subscribe packet
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 559 if (rc != len)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 560 goto exit; // there was a problem
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 561
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 562 /* wait for acks */
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 563 if (resultHandler == 0)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 564 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 565 if (message->qos == QOS1)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 566 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 567 if (waitfor(PUBACK, atimer) == PUBACK)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 568 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 569 int type, dup, mypacketid;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 570 if (MQTTDeserialize_ack(&type, &dup, &mypacketid, readbuf, limits.MAX_MQTT_PACKET_SIZE) == 1)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 571 rc = 0;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 572 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 573 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 574 else if (message->qos == QOS2)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 575 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 576 if (waitfor(PUBCOMP, atimer) == PUBCOMP)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 577 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 578 int type, dup, mypacketid;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 579 if (MQTTDeserialize_ack(&type, &dup, &mypacketid, readbuf, limits.MAX_MQTT_PACKET_SIZE) == 1)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 580 rc = 0;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 581 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 582
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 583 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 584 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 585 else
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 586 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 587 // set publish response callback function
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 588
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 589 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 590
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 591 exit:
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 592 return rc;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 593 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 594
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 595
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 596 template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::disconnect(resultHandler resultHandler)
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 597 {
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 598 Timer timer = Timer(limits.command_timeout_ms); // we might wait for incomplete incoming publishes to complete
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 599 int len = MQTTSerialize_disconnect(buf, limits.MAX_MQTT_PACKET_SIZE);
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 600 int rc = sendPacket(len, timer.left_ms()); // send the disconnect packet
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 601
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 602 return (rc == len) ? 0 : -1;
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 603 }
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 604
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 605
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 606
akhtar.syedzeeshan@gmail.com 0:f4dbe435e64c 607 #endif