Rym Badri / MQTT

cc

Dependencies:   MQTTPacket FP

MQTTClient.h@50:3a01977eeebc, 2022-06-10 (annotated)

Committer:
badri_rym
Date:
Fri Jun 10 12:51:45 2022 +0000
Revision:
50:3a01977eeebc
Parent:
49:c66fdbb9eb83 
cc

Who changed what in which revision?

UserRevisionLine numberNew contents of line
icraggs 6:4d312a49200b 1 /*******************************************************************************
icraggs 46:e335fcc1a663 2 * Copyright (c) 2014, 2015 IBM Corp.
sam_grove 0:fe461e4d7afe 3 *
icraggs 6:4d312a49200b 4 * All rights reserved. This program and the accompanying materials
icraggs 6:4d312a49200b 5 * are made available under the terms of the Eclipse Public License v1.0
icraggs 6:4d312a49200b 6 * and Eclipse Distribution License v1.0 which accompany this distribution.
sam_grove 0:fe461e4d7afe 7 *
icraggs 6:4d312a49200b 8 * The Eclipse Public License is available at
icraggs 6:4d312a49200b 9 * http://www.eclipse.org/legal/epl-v10.html
icraggs 6:4d312a49200b 10 * and the Eclipse Distribution License is available at
icraggs 6:4d312a49200b 11 * http://www.eclipse.org/org/documents/edl-v10.php.
sam_grove 0:fe461e4d7afe 12 *
icraggs 6:4d312a49200b 13 * Contributors:
icraggs 6:4d312a49200b 14 * Ian Craggs - initial API and implementation and/or initial documentation
icraggs 46:e335fcc1a663 15 * Ian Craggs - fix for bug 458512 - QoS 2 messages
icraggs 46:e335fcc1a663 16 * Ian Craggs - fix for bug 460389 - send loop uses wrong length
icraggs 46:e335fcc1a663 17 * Ian Craggs - fix for bug 464169 - clearing subscriptions
icraggs 46:e335fcc1a663 18 * Ian Craggs - fix for bug 464551 - enums and ints can be different size
icraggs 6:4d312a49200b 19 *******************************************************************************/
sam_grove 0:fe461e4d7afe 20
icraggs 2:dcfdd2abfe71 21 #if !defined(MQTTCLIENT_H)
icraggs 2:dcfdd2abfe71 22 #define MQTTCLIENT_H
icraggs 2:dcfdd2abfe71 23
icraggs 34:e18a166198df 24 #include "FP.h"
icraggs 3:dbff6b768d28 25 #include "MQTTPacket.h"
icraggs 6:4d312a49200b 26 #include "stdio.h"
icraggs 43:21da1f744243 27 #include "MQTTLogging.h"
icraggs 43:21da1f744243 28
icraggs 43:21da1f744243 29 #if !defined(MQTTCLIENT_QOS1)
icraggs 43:21da1f744243 30 #define MQTTCLIENT_QOS1 1
icraggs 43:21da1f744243 31 #endif
icraggs 43:21da1f744243 32 #if !defined(MQTTCLIENT_QOS2)
icraggs 43:21da1f744243 33 #define MQTTCLIENT_QOS2 0
icraggs 43:21da1f744243 34 #endif
icraggs 2:dcfdd2abfe71 35
icraggs 3:dbff6b768d28 36 namespace MQTT
icraggs 3:dbff6b768d28 37 {
icraggs 3:dbff6b768d28 38
icraggs 2:dcfdd2abfe71 39
icraggs 2:dcfdd2abfe71 40 enum QoS { QOS0, QOS1, QOS2 };
sam_grove 0:fe461e4d7afe 41
icraggs 31:a51dd239b78e 42 // all failure return codes must be negative
icraggs 23:05fc7de97d4a 43 enum returnCode { BUFFER_OVERFLOW = -2, FAILURE = -1, SUCCESS = 0 };
icraggs 23:05fc7de97d4a 44
icraggs 2:dcfdd2abfe71 45
icraggs 3:dbff6b768d28 46 struct Message
icraggs 2:dcfdd2abfe71 47 {
icraggs 2:dcfdd2abfe71 48 enum QoS qos;
icraggs 2:dcfdd2abfe71 49 bool retained;
icraggs 2:dcfdd2abfe71 50 bool dup;
Ian Craggs 12:cc7f2d62a393 51 unsigned short id;
icraggs 2:dcfdd2abfe71 52 void *payload;
icraggs 2:dcfdd2abfe71 53 size_t payloadlen;
sam_grove 0:fe461e4d7afe 54 };
sam_grove 0:fe461e4d7afe 55
icraggs 4:4ef00243708e 56
icraggs 20:cad3d54d7ecf 57 struct MessageData
icraggs 20:cad3d54d7ecf 58 {
icraggs 31:a51dd239b78e 59 MessageData(MQTTString &aTopicName, struct Message &aMessage) : message(aMessage), topicName(aTopicName)
icraggs 37:e3d64f9b986c 60 { }
icraggs 43:21da1f744243 61
icraggs 31:a51dd239b78e 62 struct Message &message;
icraggs 31:a51dd239b78e 63 MQTTString &topicName;
icraggs 20:cad3d54d7ecf 64 };
icraggs 20:cad3d54d7ecf 65
icraggs 20:cad3d54d7ecf 66
icraggs 9:01b8cc7d94cc 67 class PacketId
icraggs 9:01b8cc7d94cc 68 {
icraggs 9:01b8cc7d94cc 69 public:
icraggs 23:05fc7de97d4a 70 PacketId()
icraggs 23:05fc7de97d4a 71 {
icraggs 23:05fc7de97d4a 72 next = 0;
icraggs 23:05fc7de97d4a 73 }
icraggs 43:21da1f744243 74
icraggs 23:05fc7de97d4a 75 int getNext()
icraggs 23:05fc7de97d4a 76 {
icraggs 23:05fc7de97d4a 77 return next = (next == MAX_PACKET_ID) ? 1 : ++next;
icraggs 23:05fc7de97d4a 78 }
icraggs 43:21da1f744243 79
icraggs 9:01b8cc7d94cc 80 private:
icraggs 9:01b8cc7d94cc 81 static const int MAX_PACKET_ID = 65535;
icraggs 9:01b8cc7d94cc 82 int next;
icraggs 9:01b8cc7d94cc 83 };
icraggs 31:a51dd239b78e 84
icraggs 31:a51dd239b78e 85
icraggs 21:e918525e529d 86 /**
icraggs 21:e918525e529d 87 * @class Client
icraggs 22:aadb79d29330 88 * @brief blocking, non-threaded MQTT client API
icraggs 43:21da1f744243 89 *
icraggs 23:05fc7de97d4a 90 * This version of the API blocks on all method calls, until they are complete. This means that only one
icraggs 43:21da1f744243 91 * MQTT request can be in process at any one time.
icraggs 21:e918525e529d 92 * @param Network a network class which supports send, receive
icraggs 43:21da1f744243 93 * @param Timer a timer class with the methods:
icraggs 43:21da1f744243 94 */
icraggs 31:a51dd239b78e 95 template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE = 100, int MAX_MESSAGE_HANDLERS = 5>
icraggs 31:a51dd239b78e 96 class Client
icraggs 2:dcfdd2abfe71 97 {
icraggs 43:21da1f744243 98
icraggs 22:aadb79d29330 99 public:
icraggs 43:21da1f744243 100
icraggs 31:a51dd239b78e 101 typedef void (*messageHandler)(MessageData&);
icraggs 23:05fc7de97d4a 102
icraggs 23:05fc7de97d4a 103 /** Construct the client
icraggs 23:05fc7de97d4a 104 * @param network - pointer to an instance of the Network class - must be connected to the endpoint
icraggs 23:05fc7de97d4a 105 * before calling MQTT connect
icraggs 23:05fc7de97d4a 106 * @param limits an instance of the Limit class - to alter limits as required
icraggs 23:05fc7de97d4a 107 */
icraggs 43:21da1f744243 108 Client(Network& network, unsigned int command_timeout_ms = 30000);
icraggs 43:21da1f744243 109
icraggs 20:cad3d54d7ecf 110 /** Set the default message handling callback - used for any message which does not match a subscription message handler
icraggs 20:cad3d54d7ecf 111 * @param mh - pointer to the callback function
icraggs 20:cad3d54d7ecf 112 */
icraggs 20:cad3d54d7ecf 113 void setDefaultMessageHandler(messageHandler mh)
icraggs 20:cad3d54d7ecf 114 {
icraggs 20:cad3d54d7ecf 115 defaultMessageHandler.attach(mh);
icraggs 20:cad3d54d7ecf 116 }
icraggs 42:f5beda831651 117
icraggs 43:21da1f744243 118 /** MQTT Connect - send an MQTT connect packet down the network and wait for a Connack
icraggs 43:21da1f744243 119 * The nework object must be connected to the network endpoint before calling this
icraggs 43:21da1f744243 120 * Default connect options are used
icraggs 43:21da1f744243 121 * @return success code -
icraggs 43:21da1f744243 122 */
icraggs 43:21da1f744243 123 int connect();
icraggs 42:f5beda831651 124
icraggs 46:e335fcc1a663 125 /** MQTT Connect - send an MQTT connect packet down the network and wait for a Connack
icraggs 43:21da1f744243 126 * The nework object must be connected to the network endpoint before calling this
icraggs 20:cad3d54d7ecf 127 * @param options - connect options
icraggs 43:21da1f744243 128 * @return success code -
icraggs 43:21da1f744243 129 */
icraggs 43:21da1f744243 130 int connect(MQTTPacket_connectData& options);
icraggs 43:21da1f744243 131
icraggs 20:cad3d54d7ecf 132 /** MQTT Publish - send an MQTT publish packet and wait for all acks to complete for all QoSs
icraggs 20:cad3d54d7ecf 133 * @param topic - the topic to publish to
icraggs 20:cad3d54d7ecf 134 * @param message - the message to send
icraggs 43:21da1f744243 135 * @return success code -
icraggs 43:21da1f744243 136 */
icraggs 43:21da1f744243 137 int publish(const char* topicName, Message& message);
icraggs 43:21da1f744243 138
icraggs 43:21da1f744243 139 /** MQTT Publish - send an MQTT publish packet and wait for all acks to complete for all QoSs
icraggs 43:21da1f744243 140 * @param topic - the topic to publish to
icraggs 43:21da1f744243 141 * @param payload - the data to send
icraggs 43:21da1f744243 142 * @param payloadlen - the length of the data
icraggs 43:21da1f744243 143 * @param qos - the QoS to send the publish at
icraggs 43:21da1f744243 144 * @param retained - whether the message should be retained
icraggs 43:21da1f744243 145 * @return success code -
icraggs 43:21da1f744243 146 */
icraggs 43:21da1f744243 147 int publish(const char* topicName, void* payload, size_t payloadlen, enum QoS qos = QOS0, bool retained = false);
icraggs 43:21da1f744243 148
icraggs 43:21da1f744243 149 /** MQTT Publish - send an MQTT publish packet and wait for all acks to complete for all QoSs
icraggs 43:21da1f744243 150 * @param topic - the topic to publish to
icraggs 43:21da1f744243 151 * @param payload - the data to send
icraggs 43:21da1f744243 152 * @param payloadlen - the length of the data
icraggs 43:21da1f744243 153 * @param id - the packet id used - returned
icraggs 43:21da1f744243 154 * @param qos - the QoS to send the publish at
icraggs 43:21da1f744243 155 * @param retained - whether the message should be retained
icraggs 43:21da1f744243 156 * @return success code -
icraggs 43:21da1f744243 157 */
icraggs 43:21da1f744243 158 int publish(const char* topicName, void* payload, size_t payloadlen, unsigned short& id, enum QoS qos = QOS1, bool retained = false);
icraggs 43:21da1f744243 159
icraggs 20:cad3d54d7ecf 160 /** MQTT Subscribe - send an MQTT subscribe packet and wait for the suback
icraggs 20:cad3d54d7ecf 161 * @param topicFilter - a topic pattern which can include wildcards
icraggs 20:cad3d54d7ecf 162 * @param qos - the MQTT QoS to subscribe at
icraggs 20:cad3d54d7ecf 163 * @param mh - the callback function to be invoked when a message is received for this subscription
icraggs 43:21da1f744243 164 * @return success code -
icraggs 43:21da1f744243 165 */
icraggs 20:cad3d54d7ecf 166 int subscribe(const char* topicFilter, enum QoS qos, messageHandler mh);
icraggs 43:21da1f744243 167
icraggs 20:cad3d54d7ecf 168 /** MQTT Unsubscribe - send an MQTT unsubscribe packet and wait for the unsuback
icraggs 20:cad3d54d7ecf 169 * @param topicFilter - a topic pattern which can include wildcards
icraggs 43:21da1f744243 170 * @return success code -
icraggs 43:21da1f744243 171 */
icraggs 20:cad3d54d7ecf 172 int unsubscribe(const char* topicFilter);
icraggs 43:21da1f744243 173
icraggs 31:a51dd239b78e 174 /** MQTT Disconnect - send an MQTT disconnect packet, and clean up any state
icraggs 43:21da1f744243 175 * @return success code -
icraggs 20:cad3d54d7ecf 176 */
icraggs 20:cad3d54d7ecf 177 int disconnect();
icraggs 43:21da1f744243 178
icraggs 20:cad3d54d7ecf 179 /** A call to this API must be made within the keepAlive interval to keep the MQTT connection alive
icraggs 43:21da1f744243 180 * yield can be called if no other MQTT operation is needed. This will also allow messages to be
icraggs 20:cad3d54d7ecf 181 * received.
icraggs 23:05fc7de97d4a 182 * @param timeout_ms the time to wait, in milliseconds
icraggs 26:2658bb87c53d 183 * @return success code - on failure, this means the client has disconnected
icraggs 20:cad3d54d7ecf 184 */
icraggs 43:21da1f744243 185 int yield(unsigned long timeout_ms = 1000L);
icraggs 43:21da1f744243 186
icraggs 43:21da1f744243 187 /** Is the client connected?
icraggs 43:21da1f744243 188 * @return flag - is the client connected or not?
icraggs 43:21da1f744243 189 */
icraggs 43:21da1f744243 190 bool isConnected()
icraggs 43:21da1f744243 191 {
icraggs 43:21da1f744243 192 return isconnected;
icraggs 43:21da1f744243 193 }
icraggs 43:21da1f744243 194
icraggs 20:cad3d54d7ecf 195 private:
icraggs 20:cad3d54d7ecf 196
icraggs 46:e335fcc1a663 197 void cleanSession();
icraggs 20:cad3d54d7ecf 198 int cycle(Timer& timer);
icraggs 20:cad3d54d7ecf 199 int waitfor(int packet_type, Timer& timer);
icraggs 20:cad3d54d7ecf 200 int keepalive();
icraggs 43:21da1f744243 201 int publish(int len, Timer& timer, enum QoS qos);
icraggs 2:dcfdd2abfe71 202
icraggs 3:dbff6b768d28 203 int decodePacket(int* value, int timeout);
icraggs 20:cad3d54d7ecf 204 int readPacket(Timer& timer);
icraggs 20:cad3d54d7ecf 205 int sendPacket(int length, Timer& timer);
icraggs 26:2658bb87c53d 206 int deliverMessage(MQTTString& topicName, Message& message);
icraggs 26:2658bb87c53d 207 bool isTopicMatched(char* topicFilter, MQTTString& topicName);
icraggs 43:21da1f744243 208
icraggs 23:05fc7de97d4a 209 Network& ipstack;
icraggs 43:21da1f744243 210 unsigned long command_timeout_ms;
icraggs 15:64a57183aa03 211
icraggs 43:21da1f744243 212 unsigned char sendbuf[MAX_MQTT_PACKET_SIZE];
icraggs 43:21da1f744243 213 unsigned char readbuf[MAX_MQTT_PACKET_SIZE];
icraggs 43:21da1f744243 214
icraggs 43:21da1f744243 215 Timer last_sent, last_received;
icraggs 15:64a57183aa03 216 unsigned int keepAliveInterval;
icraggs 20:cad3d54d7ecf 217 bool ping_outstanding;
icraggs 43:21da1f744243 218 bool cleansession;
icraggs 43:21da1f744243 219
icraggs 9:01b8cc7d94cc 220 PacketId packetid;
icraggs 43:21da1f744243 221
icraggs 16:91c2f9a144d4 222 struct MessageHandlers
icraggs 15:64a57183aa03 223 {
icraggs 26:2658bb87c53d 224 const char* topicFilter;
icraggs 31:a51dd239b78e 225 FP<void, MessageData&> fp;
icraggs 23:05fc7de97d4a 226 } messageHandlers[MAX_MESSAGE_HANDLERS]; // Message handlers are indexed by subscription topic
icraggs 43:21da1f744243 227
icraggs 31:a51dd239b78e 228 FP<void, MessageData&> defaultMessageHandler;
icraggs 43:21da1f744243 229
icraggs 26:2658bb87c53d 230 bool isconnected;
icraggs 43:21da1f744243 231
icraggs 43:21da1f744243 232 #if MQTTCLIENT_QOS1 || MQTTCLIENT_QOS2
icraggs 43:21da1f744243 233 unsigned char pubbuf[MAX_MQTT_PACKET_SIZE]; // store the last publish for sending on reconnect
icraggs 43:21da1f744243 234 int inflightLen;
icraggs 43:21da1f744243 235 unsigned short inflightMsgid;
icraggs 43:21da1f744243 236 enum QoS inflightQoS;
icraggs 43:21da1f744243 237 #endif
icraggs 43:21da1f744243 238
icraggs 43:21da1f744243 239 #if MQTTCLIENT_QOS2
icraggs 43:21da1f744243 240 bool pubrel;
icraggs 43:21da1f744243 241 #if !defined(MAX_INCOMING_QOS2_MESSAGES)
icraggs 43:21da1f744243 242 #define MAX_INCOMING_QOS2_MESSAGES 10
icraggs 43:21da1f744243 243 #endif
icraggs 43:21da1f744243 244 unsigned short incomingQoS2messages[MAX_INCOMING_QOS2_MESSAGES];
icraggs 43:21da1f744243 245 bool isQoS2msgidFree(unsigned short id);
icraggs 43:21da1f744243 246 bool useQoS2msgid(unsigned short id);
icraggs 46:e335fcc1a663 247 void freeQoS2msgid(unsigned short id);
icraggs 31:a51dd239b78e 248 #endif
icraggs 28:8b2abe9bd814 249
sam_grove 0:fe461e4d7afe 250 };
sam_grove 0:fe461e4d7afe 251
icraggs 15:64a57183aa03 252 }
icraggs 15:64a57183aa03 253
icraggs 15:64a57183aa03 254
icraggs 43:21da1f744243 255 template<class Network, class Timer, int a, int MAX_MESSAGE_HANDLERS>
icraggs 46:e335fcc1a663 256 void MQTT::Client<Network, Timer, a, MAX_MESSAGE_HANDLERS>::cleanSession()
icraggs 46:e335fcc1a663 257 {
icraggs 46:e335fcc1a663 258 ping_outstanding = false;
icraggs 46:e335fcc1a663 259 for (int i = 0; i < MAX_MESSAGE_HANDLERS; ++i)
icraggs 46:e335fcc1a663 260 messageHandlers[i].topicFilter = 0;
icraggs 46:e335fcc1a663 261 isconnected = false;
icraggs 46:e335fcc1a663 262
icraggs 46:e335fcc1a663 263 #if MQTTCLIENT_QOS1 || MQTTCLIENT_QOS2
icraggs 46:e335fcc1a663 264 inflightMsgid = 0;
icraggs 46:e335fcc1a663 265 inflightQoS = QOS0;
icraggs 46:e335fcc1a663 266 #endif
icraggs 46:e335fcc1a663 267
icraggs 46:e335fcc1a663 268 #if MQTTCLIENT_QOS2
icraggs 46:e335fcc1a663 269 pubrel = false;
icraggs 46:e335fcc1a663 270 for (int i = 0; i < MAX_INCOMING_QOS2_MESSAGES; ++i)
icraggs 46:e335fcc1a663 271 incomingQoS2messages[i] = 0;
icraggs 46:e335fcc1a663 272 #endif
icraggs 46:e335fcc1a663 273 }
icraggs 46:e335fcc1a663 274
icraggs 46:e335fcc1a663 275
icraggs 46:e335fcc1a663 276 template<class Network, class Timer, int a, int MAX_MESSAGE_HANDLERS>
icraggs 23:05fc7de97d4a 277 MQTT::Client<Network, Timer, a, MAX_MESSAGE_HANDLERS>::Client(Network& network, unsigned int command_timeout_ms) : ipstack(network), packetid()
icraggs 15:64a57183aa03 278 {
icraggs 43:21da1f744243 279 this->command_timeout_ms = command_timeout_ms;
icraggs 46:e335fcc1a663 280 cleanSession();
icraggs 46:e335fcc1a663 281 }
icraggs 43:21da1f744243 282
icraggs 43:21da1f744243 283
icraggs 43:21da1f744243 284 #if MQTTCLIENT_QOS2
icraggs 43:21da1f744243 285 template<class Network, class Timer, int a, int b>
icraggs 43:21da1f744243 286 bool MQTT::Client<Network, Timer, a, b>::isQoS2msgidFree(unsigned short id)
icraggs 43:21da1f744243 287 {
icraggs 43:21da1f744243 288 for (int i = 0; i < MAX_INCOMING_QOS2_MESSAGES; ++i)
icraggs 43:21da1f744243 289 {
icraggs 43:21da1f744243 290 if (incomingQoS2messages[i] == id)
icraggs 43:21da1f744243 291 return false;
icraggs 43:21da1f744243 292 }
icraggs 43:21da1f744243 293 return true;
icraggs 11:db15da110a37 294 }
icraggs 11:db15da110a37 295
icraggs 11:db15da110a37 296
icraggs 43:21da1f744243 297 template<class Network, class Timer, int a, int b>
icraggs 43:21da1f744243 298 bool MQTT::Client<Network, Timer, a, b>::useQoS2msgid(unsigned short id)
icraggs 43:21da1f744243 299 {
icraggs 43:21da1f744243 300 for (int i = 0; i < MAX_INCOMING_QOS2_MESSAGES; ++i)
icraggs 43:21da1f744243 301 {
icraggs 43:21da1f744243 302 if (incomingQoS2messages[i] == 0)
icraggs 43:21da1f744243 303 {
icraggs 43:21da1f744243 304 incomingQoS2messages[i] = id;
icraggs 43:21da1f744243 305 return true;
icraggs 43:21da1f744243 306 }
icraggs 43:21da1f744243 307 }
icraggs 43:21da1f744243 308 return false;
icraggs 43:21da1f744243 309 }
icraggs 46:e335fcc1a663 310
icraggs 46:e335fcc1a663 311
icraggs 46:e335fcc1a663 312 template<class Network, class Timer, int a, int b>
icraggs 46:e335fcc1a663 313 void MQTT::Client<Network, Timer, a, b>::freeQoS2msgid(unsigned short id)
icraggs 46:e335fcc1a663 314 {
icraggs 46:e335fcc1a663 315 for (int i = 0; i < MAX_INCOMING_QOS2_MESSAGES; ++i)
icraggs 46:e335fcc1a663 316 {
icraggs 46:e335fcc1a663 317 if (incomingQoS2messages[i] == id)
icraggs 46:e335fcc1a663 318 {
icraggs 46:e335fcc1a663 319 incomingQoS2messages[i] = 0;
icraggs 46:e335fcc1a663 320 return;
icraggs 46:e335fcc1a663 321 }
icraggs 46:e335fcc1a663 322 }
icraggs 46:e335fcc1a663 323 }
icraggs 43:21da1f744243 324 #endif
icraggs 43:21da1f744243 325
icraggs 43:21da1f744243 326
icraggs 43:21da1f744243 327 template<class Network, class Timer, int a, int b>
icraggs 23:05fc7de97d4a 328 int MQTT::Client<Network, Timer, a, b>::sendPacket(int length, Timer& timer)
icraggs 8:c46930bd6c82 329 {
icraggs 43:21da1f744243 330 int rc = FAILURE,
icraggs 23:05fc7de97d4a 331 sent = 0;
icraggs 43:21da1f744243 332
icraggs 23:05fc7de97d4a 333 while (sent < length && !timer.expired())
icraggs 23:05fc7de97d4a 334 {
icraggs 46:e335fcc1a663 335 rc = ipstack.write(&sendbuf[sent], length - sent, timer.left_ms());
icraggs 26:2658bb87c53d 336 if (rc < 0) // there was an error writing the data
icraggs 26:2658bb87c53d 337 break;
icraggs 26:2658bb87c53d 338 sent += rc;
icraggs 23:05fc7de97d4a 339 }
icraggs 20:cad3d54d7ecf 340 if (sent == length)
icraggs 23:05fc7de97d4a 341 {
icraggs 43:21da1f744243 342 if (this->keepAliveInterval > 0)
icraggs 43:21da1f744243 343 last_sent.countdown(this->keepAliveInterval); // record the fact that we have successfully sent the packet
icraggs 23:05fc7de97d4a 344 rc = SUCCESS;
icraggs 23:05fc7de97d4a 345 }
icraggs 23:05fc7de97d4a 346 else
icraggs 23:05fc7de97d4a 347 rc = FAILURE;
icraggs 43:21da1f744243 348
icraggs 43:21da1f744243 349 #if defined(MQTT_DEBUG)
icraggs 46:e335fcc1a663 350 char printbuf[150];
icraggs 46:e335fcc1a663 351 DEBUG("Rc %d from sending packet %s\n", rc, MQTTFormat_toServerString(printbuf, sizeof(printbuf), sendbuf, length));
icraggs 43:21da1f744243 352 #endif
icraggs 23:05fc7de97d4a 353 return rc;
icraggs 8:c46930bd6c82 354 }
icraggs 8:c46930bd6c82 355
icraggs 8:c46930bd6c82 356
icraggs 43:21da1f744243 357 template<class Network, class Timer, int a, int b>
icraggs 26:2658bb87c53d 358 int MQTT::Client<Network, Timer, a, b>::decodePacket(int* value, int timeout)
icraggs 8:c46930bd6c82 359 {
icraggs 36:2f1ada427e56 360 unsigned char c;
icraggs 8:c46930bd6c82 361 int multiplier = 1;
icraggs 8:c46930bd6c82 362 int len = 0;
icraggs 20:cad3d54d7ecf 363 const int MAX_NO_OF_REMAINING_LENGTH_BYTES = 4;
icraggs 8:c46930bd6c82 364
icraggs 8:c46930bd6c82 365 *value = 0;
icraggs 8:c46930bd6c82 366 do
icraggs 8:c46930bd6c82 367 {
icraggs 8:c46930bd6c82 368 int rc = MQTTPACKET_READ_ERROR;
icraggs 8:c46930bd6c82 369
icraggs 8:c46930bd6c82 370 if (++len > MAX_NO_OF_REMAINING_LENGTH_BYTES)
icraggs 8:c46930bd6c82 371 {
icraggs 8:c46930bd6c82 372 rc = MQTTPACKET_READ_ERROR; /* bad data */
icraggs 8:c46930bd6c82 373 goto exit;
icraggs 8:c46930bd6c82 374 }
icraggs 23:05fc7de97d4a 375 rc = ipstack.read(&c, 1, timeout);
icraggs 8:c46930bd6c82 376 if (rc != 1)
icraggs 8:c46930bd6c82 377 goto exit;
icraggs 8:c46930bd6c82 378 *value += (c & 127) * multiplier;
icraggs 8:c46930bd6c82 379 multiplier *= 128;
icraggs 8:c46930bd6c82 380 } while ((c & 128) != 0);
icraggs 8:c46930bd6c82 381 exit:
icraggs 8:c46930bd6c82 382 return len;
icraggs 8:c46930bd6c82 383 }
icraggs 8:c46930bd6c82 384
icraggs 8:c46930bd6c82 385
icraggs 8:c46930bd6c82 386 /**
icraggs 8:c46930bd6c82 387 * If any read fails in this method, then we should disconnect from the network, as on reconnect
icraggs 43:21da1f744243 388 * the packets can be retried.
icraggs 8:c46930bd6c82 389 * @param timeout the max time to wait for the packet read to complete, in milliseconds
icraggs 8:c46930bd6c82 390 * @return the MQTT packet type, or -1 if none
icraggs 8:c46930bd6c82 391 */
icraggs 46:e335fcc1a663 392 template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int b>
icraggs 46:e335fcc1a663 393 int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::readPacket(Timer& timer)
icraggs 8:c46930bd6c82 394 {
icraggs 26:2658bb87c53d 395 int rc = FAILURE;
icraggs 8:c46930bd6c82 396 MQTTHeader header = {0};
icraggs 8:c46930bd6c82 397 int len = 0;
icraggs 8:c46930bd6c82 398 int rem_len = 0;
icraggs 8:c46930bd6c82 399
icraggs 8:c46930bd6c82 400 /* 1. read the header byte. This has the packet type in it */
icraggs 23:05fc7de97d4a 401 if (ipstack.read(readbuf, 1, timer.left_ms()) != 1)
icraggs 8:c46930bd6c82 402 goto exit;
icraggs 8:c46930bd6c82 403
icraggs 8:c46930bd6c82 404 len = 1;
icraggs 8:c46930bd6c82 405 /* 2. read the remaining length. This is variable in itself */
icraggs 20:cad3d54d7ecf 406 decodePacket(&rem_len, timer.left_ms());
icraggs 43:21da1f744243 407 len += MQTTPacket_encode(readbuf + 1, rem_len); /* put the original remaining length into the buffer */
icraggs 8:c46930bd6c82 408
icraggs 46:e335fcc1a663 409 if (rem_len > (MAX_MQTT_PACKET_SIZE - len))
icraggs 46:e335fcc1a663 410 {
icraggs 46:e335fcc1a663 411 rc = BUFFER_OVERFLOW;
icraggs 46:e335fcc1a663 412 goto exit;
icraggs 46:e335fcc1a663 413 }
icraggs 46:e335fcc1a663 414
icraggs 8:c46930bd6c82 415 /* 3. read the rest of the buffer using a callback to supply the rest of the data */
icraggs 43:21da1f744243 416 if (rem_len > 0 && (ipstack.read(readbuf + len, rem_len, timer.left_ms()) != rem_len))
icraggs 8:c46930bd6c82 417 goto exit;
icraggs 8:c46930bd6c82 418
icraggs 8:c46930bd6c82 419 header.byte = readbuf[0];
icraggs 8:c46930bd6c82 420 rc = header.bits.type;
icraggs 43:21da1f744243 421 if (this->keepAliveInterval > 0)
icraggs 43:21da1f744243 422 last_received.countdown(this->keepAliveInterval); // record the fact that we have successfully received a packet
icraggs 8:c46930bd6c82 423 exit:
icraggs 43:21da1f744243 424
icraggs 43:21da1f744243 425 #if defined(MQTT_DEBUG)
icraggs 46:e335fcc1a663 426 if (rc >= 0)
icraggs 46:e335fcc1a663 427 {
icraggs 46:e335fcc1a663 428 char printbuf[50];
icraggs 46:e335fcc1a663 429 DEBUG("Rc %d from receiving packet %s\n", rc, MQTTFormat_toClientString(printbuf, sizeof(printbuf), readbuf, len));
icraggs 46:e335fcc1a663 430 }
icraggs 43:21da1f744243 431 #endif
icraggs 8:c46930bd6c82 432 return rc;
icraggs 3:dbff6b768d28 433 }
icraggs 3:dbff6b768d28 434
icraggs 8:c46930bd6c82 435
icraggs 26:2658bb87c53d 436 // assume topic filter and name is in correct format
icraggs 26:2658bb87c53d 437 // # can only be at end
icraggs 26:2658bb87c53d 438 // + and # can only be next to separator
icraggs 43:21da1f744243 439 template<class Network, class Timer, int a, int b>
icraggs 26:2658bb87c53d 440 bool MQTT::Client<Network, Timer, a, b>::isTopicMatched(char* topicFilter, MQTTString& topicName)
icraggs 26:2658bb87c53d 441 {
icraggs 26:2658bb87c53d 442 char* curf = topicFilter;
icraggs 26:2658bb87c53d 443 char* curn = topicName.lenstring.data;
icraggs 26:2658bb87c53d 444 char* curn_end = curn + topicName.lenstring.len;
icraggs 43:21da1f744243 445
icraggs 26:2658bb87c53d 446 while (*curf && curn < curn_end)
icraggs 26:2658bb87c53d 447 {
icraggs 26:2658bb87c53d 448 if (*curn == '/' && *curf != '/')
icraggs 26:2658bb87c53d 449 break;
icraggs 26:2658bb87c53d 450 if (*curf != '+' && *curf != '#' && *curf != *curn)
icraggs 26:2658bb87c53d 451 break;
icraggs 26:2658bb87c53d 452 if (*curf == '+')
icraggs 26:2658bb87c53d 453 { // skip until we meet the next separator, or end of string
icraggs 26:2658bb87c53d 454 char* nextpos = curn + 1;
icraggs 26:2658bb87c53d 455 while (nextpos < curn_end && *nextpos != '/')
icraggs 26:2658bb87c53d 456 nextpos = ++curn + 1;
icraggs 26:2658bb87c53d 457 }
icraggs 26:2658bb87c53d 458 else if (*curf == '#')
icraggs 26:2658bb87c53d 459 curn = curn_end - 1; // skip until end of string
icraggs 26:2658bb87c53d 460 curf++;
icraggs 26:2658bb87c53d 461 curn++;
icraggs 26:2658bb87c53d 462 };
icraggs 43:21da1f744243 463
icraggs 26:2658bb87c53d 464 return (curn == curn_end) && (*curf == '\0');
icraggs 26:2658bb87c53d 465 }
icraggs 26:2658bb87c53d 466
icraggs 26:2658bb87c53d 467
icraggs 26:2658bb87c53d 468
icraggs 43:21da1f744243 469 template<class Network, class Timer, int a, int MAX_MESSAGE_HANDLERS>
icraggs 26:2658bb87c53d 470 int MQTT::Client<Network, Timer, a, MAX_MESSAGE_HANDLERS>::deliverMessage(MQTTString& topicName, Message& message)
icraggs 15:64a57183aa03 471 {
icraggs 26:2658bb87c53d 472 int rc = FAILURE;
icraggs 20:cad3d54d7ecf 473
icraggs 20:cad3d54d7ecf 474 // we have to find the right message handler - indexed by topic
icraggs 23:05fc7de97d4a 475 for (int i = 0; i < MAX_MESSAGE_HANDLERS; ++i)
icraggs 20:cad3d54d7ecf 476 {
icraggs 26:2658bb87c53d 477 if (messageHandlers[i].topicFilter != 0 && (MQTTPacket_equals(&topicName, (char*)messageHandlers[i].topicFilter) ||
icraggs 26:2658bb87c53d 478 isTopicMatched((char*)messageHandlers[i].topicFilter, topicName)))
icraggs 20:cad3d54d7ecf 479 {
icraggs 26:2658bb87c53d 480 if (messageHandlers[i].fp.attached())
icraggs 26:2658bb87c53d 481 {
icraggs 31:a51dd239b78e 482 MessageData md(topicName, message);
icraggs 31:a51dd239b78e 483 messageHandlers[i].fp(md);
icraggs 26:2658bb87c53d 484 rc = SUCCESS;
icraggs 26:2658bb87c53d 485 }
icraggs 20:cad3d54d7ecf 486 }
icraggs 20:cad3d54d7ecf 487 }
icraggs 43:21da1f744243 488
icraggs 43:21da1f744243 489 if (rc == FAILURE && defaultMessageHandler.attached())
icraggs 26:2658bb87c53d 490 {
icraggs 31:a51dd239b78e 491 MessageData md(topicName, message);
icraggs 31:a51dd239b78e 492 defaultMessageHandler(md);
icraggs 26:2658bb87c53d 493 rc = SUCCESS;
icraggs 43:21da1f744243 494 }
icraggs 43:21da1f744243 495
icraggs 20:cad3d54d7ecf 496 return rc;
icraggs 15:64a57183aa03 497 }
icraggs 15:64a57183aa03 498
icraggs 15:64a57183aa03 499
icraggs 20:cad3d54d7ecf 500
icraggs 43:21da1f744243 501 template<class Network, class Timer, int a, int b>
icraggs 43:21da1f744243 502 int MQTT::Client<Network, Timer, a, b>::yield(unsigned long timeout_ms)
icraggs 20:cad3d54d7ecf 503 {
icraggs 26:2658bb87c53d 504 int rc = SUCCESS;
icraggs 20:cad3d54d7ecf 505 Timer timer = Timer();
icraggs 43:21da1f744243 506
icraggs 23:05fc7de97d4a 507 timer.countdown_ms(timeout_ms);
icraggs 20:cad3d54d7ecf 508 while (!timer.expired())
icraggs 26:2658bb87c53d 509 {
icraggs 46:e335fcc1a663 510 if (cycle(timer) < 0)
icraggs 26:2658bb87c53d 511 {
icraggs 26:2658bb87c53d 512 rc = FAILURE;
icraggs 26:2658bb87c53d 513 break;
icraggs 26:2658bb87c53d 514 }
icraggs 26:2658bb87c53d 515 }
icraggs 43:21da1f744243 516
icraggs 26:2658bb87c53d 517 return rc;
icraggs 20:cad3d54d7ecf 518 }
icraggs 20:cad3d54d7ecf 519
icraggs 20:cad3d54d7ecf 520
icraggs 43:21da1f744243 521 template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int b>
icraggs 23:05fc7de97d4a 522 int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::cycle(Timer& timer)
icraggs 8:c46930bd6c82 523 {
icraggs 8:c46930bd6c82 524 /* get one piece of work off the wire and one pass through */
icraggs 20:cad3d54d7ecf 525
Ian Craggs 12:cc7f2d62a393 526 // read the socket, see what work is due
icraggs 46:e335fcc1a663 527 int packet_type = readPacket(timer);
icraggs 43:21da1f744243 528
icraggs 26:2658bb87c53d 529 int len = 0,
icraggs 26:2658bb87c53d 530 rc = SUCCESS;
icraggs 28:8b2abe9bd814 531
icraggs 8:c46930bd6c82 532 switch (packet_type)
icraggs 8:c46930bd6c82 533 {
icraggs 46:e335fcc1a663 534 case FAILURE:
icraggs 46:e335fcc1a663 535 case BUFFER_OVERFLOW:
icraggs 46:e335fcc1a663 536 rc = packet_type;
icraggs 46:e335fcc1a663 537 break;
icraggs 15:64a57183aa03 538 case CONNACK:
icraggs 8:c46930bd6c82 539 case PUBACK:
icraggs 8:c46930bd6c82 540 case SUBACK:
icraggs 8:c46930bd6c82 541 break;
icraggs 15:64a57183aa03 542 case PUBLISH:
icraggs 46:e335fcc1a663 543 {
icraggs 46:e335fcc1a663 544 MQTTString topicName = MQTTString_initializer;
icraggs 20:cad3d54d7ecf 545 Message msg;
icraggs 46:e335fcc1a663 546 int intQoS;
icraggs 46:e335fcc1a663 547 if (MQTTDeserialize_publish((unsigned char*)&msg.dup, &intQoS, (unsigned char*)&msg.retained, (unsigned short*)&msg.id, &topicName,
icraggs 36:2f1ada427e56 548 (unsigned char**)&msg.payload, (int*)&msg.payloadlen, readbuf, MAX_MQTT_PACKET_SIZE) != 1)
icraggs 26:2658bb87c53d 549 goto exit;
icraggs 46:e335fcc1a663 550 msg.qos = (enum QoS)intQoS;
icraggs 43:21da1f744243 551 #if MQTTCLIENT_QOS2
icraggs 43:21da1f744243 552 if (msg.qos != QOS2)
icraggs 43:21da1f744243 553 #endif
icraggs 31:a51dd239b78e 554 deliverMessage(topicName, msg);
icraggs 43:21da1f744243 555 #if MQTTCLIENT_QOS2
icraggs 31:a51dd239b78e 556 else if (isQoS2msgidFree(msg.id))
icraggs 31:a51dd239b78e 557 {
icraggs 43:21da1f744243 558 if (useQoS2msgid(msg.id))
icraggs 43:21da1f744243 559 deliverMessage(topicName, msg);
icraggs 43:21da1f744243 560 else
icraggs 43:21da1f744243 561 WARN("Maximum number of incoming QoS2 messages exceeded");
icraggs 46:e335fcc1a663 562 }
icraggs 31:a51dd239b78e 563 #endif
icraggs 43:21da1f744243 564 #if MQTTCLIENT_QOS1 || MQTTCLIENT_QOS2
icraggs 20:cad3d54d7ecf 565 if (msg.qos != QOS0)
icraggs 20:cad3d54d7ecf 566 {
icraggs 20:cad3d54d7ecf 567 if (msg.qos == QOS1)
icraggs 43:21da1f744243 568 len = MQTTSerialize_ack(sendbuf, MAX_MQTT_PACKET_SIZE, PUBACK, 0, msg.id);
icraggs 20:cad3d54d7ecf 569 else if (msg.qos == QOS2)
icraggs 43:21da1f744243 570 len = MQTTSerialize_ack(sendbuf, MAX_MQTT_PACKET_SIZE, PUBREC, 0, msg.id);
icraggs 26:2658bb87c53d 571 if (len <= 0)
icraggs 26:2658bb87c53d 572 rc = FAILURE;
icraggs 26:2658bb87c53d 573 else
icraggs 26:2658bb87c53d 574 rc = sendPacket(len, timer);
icraggs 26:2658bb87c53d 575 if (rc == FAILURE)
icraggs 20:cad3d54d7ecf 576 goto exit; // there was a problem
icraggs 20:cad3d54d7ecf 577 }
Ian Craggs 12:cc7f2d62a393 578 break;
icraggs 43:21da1f744243 579 #endif
icraggs 46:e335fcc1a663 580 }
icraggs 43:21da1f744243 581 #if MQTTCLIENT_QOS2
icraggs 15:64a57183aa03 582 case PUBREC:
icraggs 46:e335fcc1a663 583 case PUBREL:
icraggs 36:2f1ada427e56 584 unsigned short mypacketid;
icraggs 36:2f1ada427e56 585 unsigned char dup, type;
icraggs 26:2658bb87c53d 586 if (MQTTDeserialize_ack(&type, &dup, &mypacketid, readbuf, MAX_MQTT_PACKET_SIZE) != 1)
icraggs 26:2658bb87c53d 587 rc = FAILURE;
icraggs 46:e335fcc1a663 588 else if ((len = MQTTSerialize_ack(sendbuf, MAX_MQTT_PACKET_SIZE,
icraggs 46:e335fcc1a663 589 (packet_type == PUBREC) ? PUBREL : PUBCOMP, 0, mypacketid)) <= 0)
icraggs 26:2658bb87c53d 590 rc = FAILURE;
icraggs 26:2658bb87c53d 591 else if ((rc = sendPacket(len, timer)) != SUCCESS) // send the PUBREL packet
icraggs 26:2658bb87c53d 592 rc = FAILURE; // there was a problem
icraggs 26:2658bb87c53d 593 if (rc == FAILURE)
icraggs 20:cad3d54d7ecf 594 goto exit; // there was a problem
icraggs 46:e335fcc1a663 595 if (packet_type == PUBREL)
icraggs 46:e335fcc1a663 596 freeQoS2msgid(mypacketid);
icraggs 8:c46930bd6c82 597 break;
icraggs 46:e335fcc1a663 598
icraggs 8:c46930bd6c82 599 case PUBCOMP:
icraggs 8:c46930bd6c82 600 break;
icraggs 43:21da1f744243 601 #endif
icraggs 15:64a57183aa03 602 case PINGRESP:
icraggs 20:cad3d54d7ecf 603 ping_outstanding = false;
icraggs 8:c46930bd6c82 604 break;
icraggs 15:64a57183aa03 605 }
icraggs 20:cad3d54d7ecf 606 keepalive();
Ian Craggs 12:cc7f2d62a393 607 exit:
icraggs 26:2658bb87c53d 608 if (rc == SUCCESS)
icraggs 26:2658bb87c53d 609 rc = packet_type;
icraggs 26:2658bb87c53d 610 return rc;
icraggs 15:64a57183aa03 611 }
icraggs 15:64a57183aa03 612
icraggs 15:64a57183aa03 613
icraggs 23:05fc7de97d4a 614 template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int b>
icraggs 23:05fc7de97d4a 615 int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::keepalive()
icraggs 15:64a57183aa03 616 {
icraggs 26:2658bb87c53d 617 int rc = FAILURE;
icraggs 15:64a57183aa03 618
icraggs 20:cad3d54d7ecf 619 if (keepAliveInterval == 0)
icraggs 26:2658bb87c53d 620 {
icraggs 26:2658bb87c53d 621 rc = SUCCESS;
icraggs 20:cad3d54d7ecf 622 goto exit;
icraggs 26:2658bb87c53d 623 }
icraggs 15:64a57183aa03 624
icraggs 43:21da1f744243 625 if (last_sent.expired() || last_received.expired())
icraggs 20:cad3d54d7ecf 626 {
icraggs 26:2658bb87c53d 627 if (!ping_outstanding)
icraggs 20:cad3d54d7ecf 628 {
icraggs 46:e335fcc1a663 629 Timer timer(1000);
icraggs 43:21da1f744243 630 int len = MQTTSerialize_pingreq(sendbuf, MAX_MQTT_PACKET_SIZE);
icraggs 26:2658bb87c53d 631 if (len > 0 && (rc = sendPacket(len, timer)) == SUCCESS) // send the ping packet
icraggs 20:cad3d54d7ecf 632 ping_outstanding = true;
icraggs 20:cad3d54d7ecf 633 }
icraggs 20:cad3d54d7ecf 634 }
icraggs 15:64a57183aa03 635
icraggs 15:64a57183aa03 636 exit:
icraggs 20:cad3d54d7ecf 637 return rc;
icraggs 8:c46930bd6c82 638 }
icraggs 8:c46930bd6c82 639
icraggs 8:c46930bd6c82 640
icraggs 16:91c2f9a144d4 641 // only used in single-threaded mode where one command at a time is in process
icraggs 43:21da1f744243 642 template<class Network, class Timer, int a, int b>
icraggs 23:05fc7de97d4a 643 int MQTT::Client<Network, Timer, a, b>::waitfor(int packet_type, Timer& timer)
icraggs 15:64a57183aa03 644 {
icraggs 26:2658bb87c53d 645 int rc = FAILURE;
icraggs 43:21da1f744243 646
icraggs 20:cad3d54d7ecf 647 do
icraggs 16:91c2f9a144d4 648 {
icraggs 43:21da1f744243 649 if (timer.expired())
icraggs 20:cad3d54d7ecf 650 break; // we timed out
icraggs 20:cad3d54d7ecf 651 }
icraggs 43:21da1f744243 652 while ((rc = cycle(timer)) != packet_type);
icraggs 43:21da1f744243 653
icraggs 20:cad3d54d7ecf 654 return rc;
icraggs 16:91c2f9a144d4 655 }
icraggs 16:91c2f9a144d4 656
icraggs 16:91c2f9a144d4 657
icraggs 43:21da1f744243 658 template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int b>
icraggs 43:21da1f744243 659 int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::connect(MQTTPacket_connectData& options)
icraggs 16:91c2f9a144d4 660 {
icraggs 46:e335fcc1a663 661 Timer connect_timer(command_timeout_ms);
icraggs 26:2658bb87c53d 662 int rc = FAILURE;
icraggs 31:a51dd239b78e 663 int len = 0;
icraggs 43:21da1f744243 664
icraggs 31:a51dd239b78e 665 if (isconnected) // don't send connect packet again if we are already connected
icraggs 31:a51dd239b78e 666 goto exit;
icraggs 8:c46930bd6c82 667
icraggs 43:21da1f744243 668 this->keepAliveInterval = options.keepAliveInterval;
icraggs 43:21da1f744243 669 this->cleansession = options.cleansession;
icraggs 43:21da1f744243 670 if ((len = MQTTSerialize_connect(sendbuf, MAX_MQTT_PACKET_SIZE, &options)) <= 0)
icraggs 26:2658bb87c53d 671 goto exit;
icraggs 26:2658bb87c53d 672 if ((rc = sendPacket(len, connect_timer)) != SUCCESS) // send the connect packet
icraggs 20:cad3d54d7ecf 673 goto exit; // there was a problem
icraggs 43:21da1f744243 674
icraggs 43:21da1f744243 675 if (this->keepAliveInterval > 0)
icraggs 43:21da1f744243 676 last_received.countdown(this->keepAliveInterval);
icraggs 20:cad3d54d7ecf 677 // this will be a blocking call, wait for the connack
icraggs 20:cad3d54d7ecf 678 if (waitfor(CONNACK, connect_timer) == CONNACK)
icraggs 15:64a57183aa03 679 {
icraggs 36:2f1ada427e56 680 unsigned char connack_rc = 255;
icraggs 37:e3d64f9b986c 681 bool sessionPresent = false;
icraggs 37:e3d64f9b986c 682 if (MQTTDeserialize_connack((unsigned char*)&sessionPresent, &connack_rc, readbuf, MAX_MQTT_PACKET_SIZE) == 1)
icraggs 20:cad3d54d7ecf 683 rc = connack_rc;
icraggs 26:2658bb87c53d 684 else
icraggs 26:2658bb87c53d 685 rc = FAILURE;
icraggs 8:c46930bd6c82 686 }
icraggs 26:2658bb87c53d 687 else
icraggs 26:2658bb87c53d 688 rc = FAILURE;
icraggs 46:e335fcc1a663 689
icraggs 43:21da1f744243 690 #if MQTTCLIENT_QOS2
icraggs 46:e335fcc1a663 691 // resend any inflight publish
icraggs 46:e335fcc1a663 692 if (inflightMsgid > 0 && inflightQoS == QOS2 && pubrel)
icraggs 43:21da1f744243 693 {
icraggs 43:21da1f744243 694 if ((len = MQTTSerialize_ack(sendbuf, MAX_MQTT_PACKET_SIZE, PUBREL, 0, inflightMsgid)) <= 0)
icraggs 43:21da1f744243 695 rc = FAILURE;
icraggs 43:21da1f744243 696 else
icraggs 43:21da1f744243 697 rc = publish(len, connect_timer, inflightQoS);
icraggs 43:21da1f744243 698 }
icraggs 43:21da1f744243 699 else
icraggs 43:21da1f744243 700 #endif
icraggs 43:21da1f744243 701 #if MQTTCLIENT_QOS1 || MQTTCLIENT_QOS2
icraggs 43:21da1f744243 702 if (inflightMsgid > 0)
icraggs 43:21da1f744243 703 {
icraggs 43:21da1f744243 704 memcpy(sendbuf, pubbuf, MAX_MQTT_PACKET_SIZE);
icraggs 43:21da1f744243 705 rc = publish(inflightLen, connect_timer, inflightQoS);
icraggs 43:21da1f744243 706 }
icraggs 43:21da1f744243 707 #endif
icraggs 43:21da1f744243 708
icraggs 15:64a57183aa03 709 exit:
icraggs 26:2658bb87c53d 710 if (rc == SUCCESS)
icraggs 26:2658bb87c53d 711 isconnected = true;
icraggs 8:c46930bd6c82 712 return rc;
icraggs 8:c46930bd6c82 713 }
icraggs 8:c46930bd6c82 714
icraggs 8:c46930bd6c82 715
icraggs 43:21da1f744243 716 template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int b>
icraggs 43:21da1f744243 717 int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::connect()
icraggs 43:21da1f744243 718 {
icraggs 43:21da1f744243 719 MQTTPacket_connectData default_options = MQTTPacket_connectData_initializer;
icraggs 43:21da1f744243 720 return connect(default_options);
icraggs 43:21da1f744243 721 }
icraggs 43:21da1f744243 722
icraggs 43:21da1f744243 723
icraggs 43:21da1f744243 724 template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int MAX_MESSAGE_HANDLERS>
icraggs 23:05fc7de97d4a 725 int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, MAX_MESSAGE_HANDLERS>::subscribe(const char* topicFilter, enum QoS qos, messageHandler messageHandler)
icraggs 43:21da1f744243 726 {
icraggs 43:21da1f744243 727 int rc = FAILURE;
icraggs 46:e335fcc1a663 728 Timer timer(command_timeout_ms);
icraggs 26:2658bb87c53d 729 int len = 0;
icraggs 46:e335fcc1a663 730 MQTTString topic = {(char*)topicFilter, {0, 0}};
icraggs 43:21da1f744243 731
icraggs 26:2658bb87c53d 732 if (!isconnected)
icraggs 20:cad3d54d7ecf 733 goto exit;
icraggs 43:21da1f744243 734
icraggs 43:21da1f744243 735 len = MQTTSerialize_subscribe(sendbuf, MAX_MQTT_PACKET_SIZE, 0, packetid.getNext(), 1, &topic, (int*)&qos);
icraggs 26:2658bb87c53d 736 if (len <= 0)
icraggs 26:2658bb87c53d 737 goto exit;
icraggs 23:05fc7de97d4a 738 if ((rc = sendPacket(len, timer)) != SUCCESS) // send the subscribe packet
icraggs 26:2658bb87c53d 739 goto exit; // there was a problem
icraggs 43:21da1f744243 740
icraggs 43:21da1f744243 741 if (waitfor(SUBACK, timer) == SUBACK) // wait for suback
icraggs 8:c46930bd6c82 742 {
icraggs 36:2f1ada427e56 743 int count = 0, grantedQoS = -1;
icraggs 36:2f1ada427e56 744 unsigned short mypacketid;
icraggs 23:05fc7de97d4a 745 if (MQTTDeserialize_suback(&mypacketid, 1, &count, &grantedQoS, readbuf, MAX_MQTT_PACKET_SIZE) == 1)
icraggs 43:21da1f744243 746 rc = grantedQoS; // 0, 1, 2 or 0x80
icraggs 20:cad3d54d7ecf 747 if (rc != 0x80)
icraggs 8:c46930bd6c82 748 {
icraggs 23:05fc7de97d4a 749 for (int i = 0; i < MAX_MESSAGE_HANDLERS; ++i)
icraggs 16:91c2f9a144d4 750 {
icraggs 26:2658bb87c53d 751 if (messageHandlers[i].topicFilter == 0)
icraggs 20:cad3d54d7ecf 752 {
icraggs 26:2658bb87c53d 753 messageHandlers[i].topicFilter = topicFilter;
icraggs 20:cad3d54d7ecf 754 messageHandlers[i].fp.attach(messageHandler);
icraggs 20:cad3d54d7ecf 755 rc = 0;
icraggs 20:cad3d54d7ecf 756 break;
icraggs 20:cad3d54d7ecf 757 }
icraggs 16:91c2f9a144d4 758 }
icraggs 8:c46930bd6c82 759 }
icraggs 8:c46930bd6c82 760 }
icraggs 43:21da1f744243 761 else
icraggs 26:2658bb87c53d 762 rc = FAILURE;
icraggs 43:21da1f744243 763
icraggs 15:64a57183aa03 764 exit:
icraggs 43:21da1f744243 765 if (rc != SUCCESS)
icraggs 46:e335fcc1a663 766 cleanSession();
Ian Craggs 12:cc7f2d62a393 767 return rc;
icraggs 15:64a57183aa03 768 }
icraggs 15:64a57183aa03 769
icraggs 15:64a57183aa03 770
icraggs 43:21da1f744243 771 template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int MAX_MESSAGE_HANDLERS>
icraggs 23:05fc7de97d4a 772 int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, MAX_MESSAGE_HANDLERS>::unsubscribe(const char* topicFilter)
icraggs 43:21da1f744243 773 {
icraggs 26:2658bb87c53d 774 int rc = FAILURE;
icraggs 46:e335fcc1a663 775 Timer timer(command_timeout_ms);
icraggs 46:e335fcc1a663 776 MQTTString topic = {(char*)topicFilter, {0, 0}};
icraggs 31:a51dd239b78e 777 int len = 0;
icraggs 43:21da1f744243 778
icraggs 31:a51dd239b78e 779 if (!isconnected)
icraggs 31:a51dd239b78e 780 goto exit;
icraggs 43:21da1f744243 781
icraggs 43:21da1f744243 782 if ((len = MQTTSerialize_unsubscribe(sendbuf, MAX_MQTT_PACKET_SIZE, 0, packetid.getNext(), 1, &topic)) <= 0)
icraggs 20:cad3d54d7ecf 783 goto exit;
icraggs 43:21da1f744243 784 if ((rc = sendPacket(len, timer)) != SUCCESS) // send the unsubscribe packet
icraggs 20:cad3d54d7ecf 785 goto exit; // there was a problem
icraggs 43:21da1f744243 786
icraggs 20:cad3d54d7ecf 787 if (waitfor(UNSUBACK, timer) == UNSUBACK)
Ian Craggs 12:cc7f2d62a393 788 {
icraggs 36:2f1ada427e56 789 unsigned short mypacketid; // should be the same as the packetid above
icraggs 23:05fc7de97d4a 790 if (MQTTDeserialize_unsuback(&mypacketid, readbuf, MAX_MQTT_PACKET_SIZE) == 1)
icraggs 46:e335fcc1a663 791 {
icraggs 43:21da1f744243 792 rc = 0;
icraggs 46:e335fcc1a663 793
icraggs 46:e335fcc1a663 794 // remove the subscription message handler associated with this topic, if there is one
icraggs 46:e335fcc1a663 795 for (int i = 0; i < MAX_MESSAGE_HANDLERS; ++i)
icraggs 46:e335fcc1a663 796 {
icraggs 46:e335fcc1a663 797 if (messageHandlers[i].topicFilter && strcmp(messageHandlers[i].topicFilter, topicFilter) == 0)
icraggs 46:e335fcc1a663 798 {
icraggs 46:e335fcc1a663 799 messageHandlers[i].topicFilter = 0;
icraggs 46:e335fcc1a663 800 break;
icraggs 46:e335fcc1a663 801 }
icraggs 46:e335fcc1a663 802 }
icraggs 46:e335fcc1a663 803 }
Ian Craggs 12:cc7f2d62a393 804 }
icraggs 26:2658bb87c53d 805 else
icraggs 26:2658bb87c53d 806 rc = FAILURE;
icraggs 43:21da1f744243 807
icraggs 15:64a57183aa03 808 exit:
icraggs 43:21da1f744243 809 if (rc != SUCCESS)
icraggs 46:e335fcc1a663 810 cleanSession();
Ian Craggs 12:cc7f2d62a393 811 return rc;
icraggs 15:64a57183aa03 812 }
icraggs 15:64a57183aa03 813
icraggs 15:64a57183aa03 814
icraggs 43:21da1f744243 815 template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int b>
icraggs 43:21da1f744243 816 int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::publish(int len, Timer& timer, enum QoS qos)
icraggs 20:cad3d54d7ecf 817 {
icraggs 43:21da1f744243 818 int rc;
icraggs 46:e335fcc1a663 819
icraggs 43:21da1f744243 820 if ((rc = sendPacket(len, timer)) != SUCCESS) // send the publish packet
icraggs 43:21da1f744243 821 goto exit; // there was a problem
icraggs 15:64a57183aa03 822
icraggs 46:e335fcc1a663 823 #if MQTTCLIENT_QOS1
icraggs 43:21da1f744243 824 if (qos == QOS1)
Ian Craggs 12:cc7f2d62a393 825 {
icraggs 20:cad3d54d7ecf 826 if (waitfor(PUBACK, timer) == PUBACK)
icraggs 20:cad3d54d7ecf 827 {
icraggs 36:2f1ada427e56 828 unsigned short mypacketid;
icraggs 36:2f1ada427e56 829 unsigned char dup, type;
icraggs 26:2658bb87c53d 830 if (MQTTDeserialize_ack(&type, &dup, &mypacketid, readbuf, MAX_MQTT_PACKET_SIZE) != 1)
icraggs 26:2658bb87c53d 831 rc = FAILURE;
icraggs 43:21da1f744243 832 else if (inflightMsgid == mypacketid)
icraggs 43:21da1f744243 833 inflightMsgid = 0;
icraggs 20:cad3d54d7ecf 834 }
icraggs 26:2658bb87c53d 835 else
icraggs 26:2658bb87c53d 836 rc = FAILURE;
Ian Craggs 12:cc7f2d62a393 837 }
icraggs 43:21da1f744243 838 #elif MQTTCLIENT_QOS2
icraggs 43:21da1f744243 839 else if (qos == QOS2)
Ian Craggs 12:cc7f2d62a393 840 {
icraggs 20:cad3d54d7ecf 841 if (waitfor(PUBCOMP, timer) == PUBCOMP)
icraggs 20:cad3d54d7ecf 842 {
icraggs 36:2f1ada427e56 843 unsigned short mypacketid;
icraggs 36:2f1ada427e56 844 unsigned char dup, type;
icraggs 26:2658bb87c53d 845 if (MQTTDeserialize_ack(&type, &dup, &mypacketid, readbuf, MAX_MQTT_PACKET_SIZE) != 1)
icraggs 26:2658bb87c53d 846 rc = FAILURE;
icraggs 43:21da1f744243 847 else if (inflightMsgid == mypacketid)
icraggs 43:21da1f744243 848 inflightMsgid = 0;
icraggs 20:cad3d54d7ecf 849 }
icraggs 26:2658bb87c53d 850 else
icraggs 26:2658bb87c53d 851 rc = FAILURE;
Ian Craggs 12:cc7f2d62a393 852 }
icraggs 43:21da1f744243 853 #endif
icraggs 43:21da1f744243 854
icraggs 43:21da1f744243 855 exit:
icraggs 43:21da1f744243 856 if (rc != SUCCESS)
icraggs 46:e335fcc1a663 857 cleanSession();
icraggs 43:21da1f744243 858 return rc;
icraggs 43:21da1f744243 859 }
icraggs 43:21da1f744243 860
icraggs 43:21da1f744243 861
icraggs 43:21da1f744243 862
icraggs 43:21da1f744243 863 template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int b>
icraggs 43:21da1f744243 864 int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::publish(const char* topicName, void* payload, size_t payloadlen, unsigned short& id, enum QoS qos, bool retained)
icraggs 43:21da1f744243 865 {
icraggs 43:21da1f744243 866 int rc = FAILURE;
icraggs 46:e335fcc1a663 867 Timer timer(command_timeout_ms);
icraggs 43:21da1f744243 868 MQTTString topicString = MQTTString_initializer;
icraggs 43:21da1f744243 869 int len = 0;
icraggs 43:21da1f744243 870
icraggs 43:21da1f744243 871 if (!isconnected)
icraggs 43:21da1f744243 872 goto exit;
icraggs 46:e335fcc1a663 873
icraggs 43:21da1f744243 874 topicString.cstring = (char*)topicName;
icraggs 43:21da1f744243 875
icraggs 43:21da1f744243 876 #if MQTTCLIENT_QOS1 || MQTTCLIENT_QOS2
icraggs 43:21da1f744243 877 if (qos == QOS1 || qos == QOS2)
icraggs 43:21da1f744243 878 id = packetid.getNext();
icraggs 43:21da1f744243 879 #endif
icraggs 43:21da1f744243 880
icraggs 43:21da1f744243 881 len = MQTTSerialize_publish(sendbuf, MAX_MQTT_PACKET_SIZE, 0, qos, retained, id,
icraggs 43:21da1f744243 882 topicString, (unsigned char*)payload, payloadlen);
icraggs 43:21da1f744243 883 if (len <= 0)
icraggs 43:21da1f744243 884 goto exit;
icraggs 46:e335fcc1a663 885
icraggs 43:21da1f744243 886 #if MQTTCLIENT_QOS1 || MQTTCLIENT_QOS2
icraggs 43:21da1f744243 887 if (!cleansession)
icraggs 43:21da1f744243 888 {
icraggs 43:21da1f744243 889 memcpy(pubbuf, sendbuf, len);
icraggs 43:21da1f744243 890 inflightMsgid = id;
icraggs 43:21da1f744243 891 inflightLen = len;
icraggs 43:21da1f744243 892 inflightQoS = qos;
icraggs 43:21da1f744243 893 #if MQTTCLIENT_QOS2
icraggs 43:21da1f744243 894 pubrel = false;
icraggs 43:21da1f744243 895 #endif
icraggs 43:21da1f744243 896 }
icraggs 43:21da1f744243 897 #endif
icraggs 46:e335fcc1a663 898
icraggs 43:21da1f744243 899 rc = publish(len, timer, qos);
icraggs 15:64a57183aa03 900 exit:
icraggs 8:c46930bd6c82 901 return rc;
icraggs 8:c46930bd6c82 902 }
icraggs 8:c46930bd6c82 903
icraggs 8:c46930bd6c82 904
icraggs 43:21da1f744243 905 template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int b>
icraggs 43:21da1f744243 906 int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::publish(const char* topicName, void* payload, size_t payloadlen, enum QoS qos, bool retained)
icraggs 43:21da1f744243 907 {
icraggs 43:21da1f744243 908 unsigned short id = 0; // dummy - not used for anything
icraggs 43:21da1f744243 909 return publish(topicName, payload, payloadlen, id, qos, retained);
icraggs 43:21da1f744243 910 }
icraggs 43:21da1f744243 911
icraggs 43:21da1f744243 912
icraggs 43:21da1f744243 913 template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int b>
icraggs 43:21da1f744243 914 int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::publish(const char* topicName, Message& message)
icraggs 43:21da1f744243 915 {
icraggs 43:21da1f744243 916 return publish(topicName, message.payload, message.payloadlen, message.qos, message.retained);
icraggs 43:21da1f744243 917 }
icraggs 43:21da1f744243 918
icraggs 43:21da1f744243 919
icraggs 43:21da1f744243 920 template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int b>
icraggs 23:05fc7de97d4a 921 int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::disconnect()
icraggs 43:21da1f744243 922 {
icraggs 26:2658bb87c53d 923 int rc = FAILURE;
icraggs 46:e335fcc1a663 924 Timer timer(command_timeout_ms); // we might wait for incomplete incoming publishes to complete
icraggs 44:c299463ae853 925 int len = MQTTSerialize_disconnect(sendbuf, MAX_MQTT_PACKET_SIZE);
icraggs 26:2658bb87c53d 926 if (len > 0)
icraggs 26:2658bb87c53d 927 rc = sendPacket(len, timer); // send the disconnect packet
icraggs 43:21da1f744243 928
icraggs 46:e335fcc1a663 929 if (cleansession)
icraggs 46:e335fcc1a663 930 cleanSession();
icraggs 46:e335fcc1a663 931 else
icraggs 46:e335fcc1a663 932 isconnected = false;
icraggs 23:05fc7de97d4a 933 return rc;
icraggs 20:cad3d54d7ecf 934 }
icraggs 20:cad3d54d7ecf 935
icraggs 20:cad3d54d7ecf 936
icraggs 46:e335fcc1a663 937 #endif