Alexandre Bernal / MQTT

An API for using MQTT over multiple transports

Dependencies:   FP MQTTPacket

Fork of MQTT by MQTT

MQTTClient.h@37:e3d64f9b986c, 2014-08-01 (annotated)

Committer:
icraggs
Date:
Fri Aug 01 17:01:13 2014 +0000
Revision:
37:e3d64f9b986c
Parent:
36:2f1ada427e56
Child:
40:9623a2c9c8ac
Cater for session present flag on connack

Who changed what in which revision?

UserRevisionLine numberNew contents of line
icraggs 6:4d312a49200b 1 /*******************************************************************************
icraggs 6:4d312a49200b 2 * Copyright (c) 2014 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 6:4d312a49200b 15 *******************************************************************************/
icraggs 21:e918525e529d 16
icraggs 21:e918525e529d 17 /*
icraggs 21:e918525e529d 18
icraggs 21:e918525e529d 19 TODO:
icraggs 21:e918525e529d 20
icraggs 26:2658bb87c53d 21 ensure publish packets are retried on reconnect
icraggs 23:05fc7de97d4a 22
icraggs 21:e918525e529d 23 */
sam_grove 0:fe461e4d7afe 24
icraggs 2:dcfdd2abfe71 25 #if !defined(MQTTCLIENT_H)
icraggs 2:dcfdd2abfe71 26 #define MQTTCLIENT_H
icraggs 2:dcfdd2abfe71 27
sam_grove 33:8bbc3a992326 28 #include "FP.h"
icraggs 3:dbff6b768d28 29 #include "MQTTPacket.h"
icraggs 6:4d312a49200b 30 #include "stdio.h"
icraggs 2:dcfdd2abfe71 31
icraggs 3:dbff6b768d28 32 namespace MQTT
icraggs 3:dbff6b768d28 33 {
icraggs 3:dbff6b768d28 34
icraggs 2:dcfdd2abfe71 35
icraggs 2:dcfdd2abfe71 36 enum QoS { QOS0, QOS1, QOS2 };
sam_grove 0:fe461e4d7afe 37
icraggs 31:a51dd239b78e 38 // all failure return codes must be negative
icraggs 23:05fc7de97d4a 39 enum returnCode { BUFFER_OVERFLOW = -2, FAILURE = -1, SUCCESS = 0 };
icraggs 23:05fc7de97d4a 40
icraggs 2:dcfdd2abfe71 41
icraggs 3:dbff6b768d28 42 struct Message
icraggs 2:dcfdd2abfe71 43 {
icraggs 2:dcfdd2abfe71 44 enum QoS qos;
icraggs 2:dcfdd2abfe71 45 bool retained;
icraggs 2:dcfdd2abfe71 46 bool dup;
Ian Craggs 12:cc7f2d62a393 47 unsigned short id;
icraggs 2:dcfdd2abfe71 48 void *payload;
icraggs 2:dcfdd2abfe71 49 size_t payloadlen;
sam_grove 0:fe461e4d7afe 50 };
sam_grove 0:fe461e4d7afe 51
icraggs 4:4ef00243708e 52
icraggs 20:cad3d54d7ecf 53 struct MessageData
icraggs 20:cad3d54d7ecf 54 {
icraggs 31:a51dd239b78e 55 MessageData(MQTTString &aTopicName, struct Message &aMessage) : message(aMessage), topicName(aTopicName)
icraggs 37:e3d64f9b986c 56 { }
icraggs 31:a51dd239b78e 57
icraggs 31:a51dd239b78e 58 struct Message &message;
icraggs 31:a51dd239b78e 59 MQTTString &topicName;
icraggs 20:cad3d54d7ecf 60 };
icraggs 20:cad3d54d7ecf 61
icraggs 20:cad3d54d7ecf 62
icraggs 9:01b8cc7d94cc 63 class PacketId
icraggs 9:01b8cc7d94cc 64 {
icraggs 9:01b8cc7d94cc 65 public:
icraggs 23:05fc7de97d4a 66 PacketId()
icraggs 23:05fc7de97d4a 67 {
icraggs 23:05fc7de97d4a 68 next = 0;
icraggs 23:05fc7de97d4a 69 }
icraggs 9:01b8cc7d94cc 70
icraggs 23:05fc7de97d4a 71 int getNext()
icraggs 23:05fc7de97d4a 72 {
icraggs 23:05fc7de97d4a 73 return next = (next == MAX_PACKET_ID) ? 1 : ++next;
icraggs 23:05fc7de97d4a 74 }
Ian Craggs 12:cc7f2d62a393 75
icraggs 9:01b8cc7d94cc 76 private:
icraggs 9:01b8cc7d94cc 77 static const int MAX_PACKET_ID = 65535;
icraggs 9:01b8cc7d94cc 78 int next;
icraggs 9:01b8cc7d94cc 79 };
icraggs 31:a51dd239b78e 80
icraggs 31:a51dd239b78e 81
icraggs 31:a51dd239b78e 82 class QoS2
icraggs 31:a51dd239b78e 83 {
icraggs 31:a51dd239b78e 84 public:
icraggs 31:a51dd239b78e 85
icraggs 31:a51dd239b78e 86
icraggs 31:a51dd239b78e 87 private:
icraggs 31:a51dd239b78e 88
icraggs 31:a51dd239b78e 89
icraggs 31:a51dd239b78e 90 };
icraggs 2:dcfdd2abfe71 91
icraggs 16:91c2f9a144d4 92
icraggs 21:e918525e529d 93 /**
icraggs 21:e918525e529d 94 * @class Client
icraggs 22:aadb79d29330 95 * @brief blocking, non-threaded MQTT client API
icraggs 23:05fc7de97d4a 96 *
icraggs 23:05fc7de97d4a 97 * This version of the API blocks on all method calls, until they are complete. This means that only one
icraggs 23:05fc7de97d4a 98 * MQTT request can be in process at any one time.
icraggs 21:e918525e529d 99 * @param Network a network class which supports send, receive
icraggs 21:e918525e529d 100 * @param Timer a timer class with the methods:
icraggs 21:e918525e529d 101 */
icraggs 31:a51dd239b78e 102 template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE = 100, int MAX_MESSAGE_HANDLERS = 5>
icraggs 31:a51dd239b78e 103 class Client
icraggs 2:dcfdd2abfe71 104 {
icraggs 2:dcfdd2abfe71 105
icraggs 22:aadb79d29330 106 public:
icraggs 26:2658bb87c53d 107
icraggs 31:a51dd239b78e 108 typedef void (*messageHandler)(MessageData&);
icraggs 23:05fc7de97d4a 109
icraggs 23:05fc7de97d4a 110 /** Construct the client
icraggs 23:05fc7de97d4a 111 * @param network - pointer to an instance of the Network class - must be connected to the endpoint
icraggs 23:05fc7de97d4a 112 * before calling MQTT connect
icraggs 23:05fc7de97d4a 113 * @param limits an instance of the Limit class - to alter limits as required
icraggs 23:05fc7de97d4a 114 */
icraggs 23:05fc7de97d4a 115 Client(Network& network, unsigned int command_timeout_ms = 30000);
icraggs 20:cad3d54d7ecf 116
icraggs 20:cad3d54d7ecf 117 /** Set the default message handling callback - used for any message which does not match a subscription message handler
icraggs 20:cad3d54d7ecf 118 * @param mh - pointer to the callback function
icraggs 20:cad3d54d7ecf 119 */
icraggs 20:cad3d54d7ecf 120 void setDefaultMessageHandler(messageHandler mh)
icraggs 20:cad3d54d7ecf 121 {
icraggs 20:cad3d54d7ecf 122 defaultMessageHandler.attach(mh);
icraggs 20:cad3d54d7ecf 123 }
icraggs 2:dcfdd2abfe71 124
icraggs 20:cad3d54d7ecf 125 /** MQTT Connect - send an MQTT connect packet down the network and wait for a Connack
icraggs 20:cad3d54d7ecf 126 * The nework object must be connected to the network endpoint before calling this
icraggs 20:cad3d54d7ecf 127 * @param options - connect options
icraggs 20:cad3d54d7ecf 128 * @return success code -
icraggs 20:cad3d54d7ecf 129 */
icraggs 20:cad3d54d7ecf 130 int connect(MQTTPacket_connectData* options = 0);
icraggs 20:cad3d54d7ecf 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 20:cad3d54d7ecf 135 * @return success code -
icraggs 20:cad3d54d7ecf 136 */
icraggs 20:cad3d54d7ecf 137 int publish(const char* topicName, Message* message);
icraggs 20:cad3d54d7ecf 138
icraggs 20:cad3d54d7ecf 139 /** MQTT Subscribe - send an MQTT subscribe packet and wait for the suback
icraggs 20:cad3d54d7ecf 140 * @param topicFilter - a topic pattern which can include wildcards
icraggs 20:cad3d54d7ecf 141 * @param qos - the MQTT QoS to subscribe at
icraggs 20:cad3d54d7ecf 142 * @param mh - the callback function to be invoked when a message is received for this subscription
icraggs 20:cad3d54d7ecf 143 * @return success code -
icraggs 20:cad3d54d7ecf 144 */
icraggs 20:cad3d54d7ecf 145 int subscribe(const char* topicFilter, enum QoS qos, messageHandler mh);
icraggs 9:01b8cc7d94cc 146
icraggs 20:cad3d54d7ecf 147 /** MQTT Unsubscribe - send an MQTT unsubscribe packet and wait for the unsuback
icraggs 20:cad3d54d7ecf 148 * @param topicFilter - a topic pattern which can include wildcards
icraggs 20:cad3d54d7ecf 149 * @return success code -
icraggs 20:cad3d54d7ecf 150 */
icraggs 20:cad3d54d7ecf 151 int unsubscribe(const char* topicFilter);
icraggs 20:cad3d54d7ecf 152
icraggs 31:a51dd239b78e 153 /** MQTT Disconnect - send an MQTT disconnect packet, and clean up any state
icraggs 20:cad3d54d7ecf 154 * @return success code -
icraggs 20:cad3d54d7ecf 155 */
icraggs 20:cad3d54d7ecf 156 int disconnect();
icraggs 8:c46930bd6c82 157
icraggs 20:cad3d54d7ecf 158 /** A call to this API must be made within the keepAlive interval to keep the MQTT connection alive
icraggs 20:cad3d54d7ecf 159 * yield can be called if no other MQTT operation is needed. This will also allow messages to be
icraggs 20:cad3d54d7ecf 160 * received.
icraggs 23:05fc7de97d4a 161 * @param timeout_ms the time to wait, in milliseconds
icraggs 26:2658bb87c53d 162 * @return success code - on failure, this means the client has disconnected
icraggs 20:cad3d54d7ecf 163 */
icraggs 26:2658bb87c53d 164 int yield(int timeout_ms = 1000);
icraggs 20:cad3d54d7ecf 165
icraggs 20:cad3d54d7ecf 166 private:
icraggs 20:cad3d54d7ecf 167
icraggs 20:cad3d54d7ecf 168 int cycle(Timer& timer);
icraggs 20:cad3d54d7ecf 169 int waitfor(int packet_type, Timer& timer);
icraggs 20:cad3d54d7ecf 170 int keepalive();
icraggs 2:dcfdd2abfe71 171
icraggs 3:dbff6b768d28 172 int decodePacket(int* value, int timeout);
icraggs 20:cad3d54d7ecf 173 int readPacket(Timer& timer);
icraggs 20:cad3d54d7ecf 174 int sendPacket(int length, Timer& timer);
icraggs 26:2658bb87c53d 175 int deliverMessage(MQTTString& topicName, Message& message);
icraggs 26:2658bb87c53d 176 bool isTopicMatched(char* topicFilter, MQTTString& topicName);
icraggs 3:dbff6b768d28 177
icraggs 23:05fc7de97d4a 178 Network& ipstack;
icraggs 23:05fc7de97d4a 179 unsigned int command_timeout_ms;
icraggs 16:91c2f9a144d4 180
icraggs 36:2f1ada427e56 181 unsigned char buf[MAX_MQTT_PACKET_SIZE];
icraggs 36:2f1ada427e56 182 unsigned char readbuf[MAX_MQTT_PACKET_SIZE];
icraggs 15:64a57183aa03 183
icraggs 20:cad3d54d7ecf 184 Timer ping_timer;
icraggs 15:64a57183aa03 185 unsigned int keepAliveInterval;
icraggs 20:cad3d54d7ecf 186 bool ping_outstanding;
icraggs 4:4ef00243708e 187
icraggs 9:01b8cc7d94cc 188 PacketId packetid;
icraggs 9:01b8cc7d94cc 189
icraggs 16:91c2f9a144d4 190 struct MessageHandlers
icraggs 15:64a57183aa03 191 {
icraggs 26:2658bb87c53d 192 const char* topicFilter;
icraggs 31:a51dd239b78e 193 FP<void, MessageData&> fp;
icraggs 23:05fc7de97d4a 194 } messageHandlers[MAX_MESSAGE_HANDLERS]; // Message handlers are indexed by subscription topic
icraggs 15:64a57183aa03 195
icraggs 31:a51dd239b78e 196 FP<void, MessageData&> defaultMessageHandler;
icraggs 28:8b2abe9bd814 197
icraggs 26:2658bb87c53d 198 bool isconnected;
icraggs 31:a51dd239b78e 199
icraggs 31:a51dd239b78e 200 #if 0
icraggs 31:a51dd239b78e 201 struct
icraggs 31:a51dd239b78e 202 {
icraggs 31:a51dd239b78e 203 bool used;
icraggs 31:a51dd239b78e 204 int id;
icraggs 31:a51dd239b78e 205 } QoS2messages[MAX_QOS2_MESSAGES];
icraggs 31:a51dd239b78e 206
icraggs 31:a51dd239b78e 207 #endif
icraggs 28:8b2abe9bd814 208
sam_grove 0:fe461e4d7afe 209 };
sam_grove 0:fe461e4d7afe 210
icraggs 15:64a57183aa03 211 }
icraggs 15:64a57183aa03 212
icraggs 15:64a57183aa03 213
icraggs 23:05fc7de97d4a 214 template<class Network, class Timer, int a, int MAX_MESSAGE_HANDLERS>
icraggs 23:05fc7de97d4a 215 MQTT::Client<Network, Timer, a, MAX_MESSAGE_HANDLERS>::Client(Network& network, unsigned int command_timeout_ms) : ipstack(network), packetid()
icraggs 15:64a57183aa03 216 {
icraggs 23:05fc7de97d4a 217 ping_timer = Timer();
icraggs 23:05fc7de97d4a 218 ping_outstanding = 0;
icraggs 23:05fc7de97d4a 219 for (int i = 0; i < MAX_MESSAGE_HANDLERS; ++i)
icraggs 26:2658bb87c53d 220 messageHandlers[i].topicFilter = 0;
icraggs 26:2658bb87c53d 221 this->command_timeout_ms = command_timeout_ms;
icraggs 26:2658bb87c53d 222 isconnected = false;
icraggs 11:db15da110a37 223 }
icraggs 11:db15da110a37 224
icraggs 11:db15da110a37 225
icraggs 23:05fc7de97d4a 226 template<class Network, class Timer, int a, int b>
icraggs 23:05fc7de97d4a 227 int MQTT::Client<Network, Timer, a, b>::sendPacket(int length, Timer& timer)
icraggs 8:c46930bd6c82 228 {
icraggs 23:05fc7de97d4a 229 int rc = FAILURE,
icraggs 23:05fc7de97d4a 230 sent = 0;
icraggs 8:c46930bd6c82 231
icraggs 23:05fc7de97d4a 232 while (sent < length && !timer.expired())
icraggs 23:05fc7de97d4a 233 {
icraggs 23:05fc7de97d4a 234 rc = ipstack.write(&buf[sent], length, timer.left_ms());
icraggs 26:2658bb87c53d 235 if (rc < 0) // there was an error writing the data
icraggs 26:2658bb87c53d 236 break;
icraggs 26:2658bb87c53d 237 sent += rc;
icraggs 23:05fc7de97d4a 238 }
icraggs 20:cad3d54d7ecf 239 if (sent == length)
icraggs 23:05fc7de97d4a 240 {
icraggs 20:cad3d54d7ecf 241 ping_timer.countdown(this->keepAliveInterval); // record the fact that we have successfully sent the packet
icraggs 23:05fc7de97d4a 242 rc = SUCCESS;
icraggs 23:05fc7de97d4a 243 }
icraggs 23:05fc7de97d4a 244 else
icraggs 23:05fc7de97d4a 245 rc = FAILURE;
icraggs 23:05fc7de97d4a 246 return rc;
icraggs 8:c46930bd6c82 247 }
icraggs 8:c46930bd6c82 248
icraggs 8:c46930bd6c82 249
icraggs 26:2658bb87c53d 250 template<class Network, class Timer, int a, int b>
icraggs 26:2658bb87c53d 251 int MQTT::Client<Network, Timer, a, b>::decodePacket(int* value, int timeout)
icraggs 8:c46930bd6c82 252 {
icraggs 36:2f1ada427e56 253 unsigned char c;
icraggs 8:c46930bd6c82 254 int multiplier = 1;
icraggs 8:c46930bd6c82 255 int len = 0;
icraggs 20:cad3d54d7ecf 256 const int MAX_NO_OF_REMAINING_LENGTH_BYTES = 4;
icraggs 8:c46930bd6c82 257
icraggs 8:c46930bd6c82 258 *value = 0;
icraggs 8:c46930bd6c82 259 do
icraggs 8:c46930bd6c82 260 {
icraggs 8:c46930bd6c82 261 int rc = MQTTPACKET_READ_ERROR;
icraggs 8:c46930bd6c82 262
icraggs 8:c46930bd6c82 263 if (++len > MAX_NO_OF_REMAINING_LENGTH_BYTES)
icraggs 8:c46930bd6c82 264 {
icraggs 8:c46930bd6c82 265 rc = MQTTPACKET_READ_ERROR; /* bad data */
icraggs 8:c46930bd6c82 266 goto exit;
icraggs 8:c46930bd6c82 267 }
icraggs 23:05fc7de97d4a 268 rc = ipstack.read(&c, 1, timeout);
icraggs 8:c46930bd6c82 269 if (rc != 1)
icraggs 8:c46930bd6c82 270 goto exit;
icraggs 8:c46930bd6c82 271 *value += (c & 127) * multiplier;
icraggs 8:c46930bd6c82 272 multiplier *= 128;
icraggs 8:c46930bd6c82 273 } while ((c & 128) != 0);
icraggs 8:c46930bd6c82 274 exit:
icraggs 8:c46930bd6c82 275 return len;
icraggs 8:c46930bd6c82 276 }
icraggs 8:c46930bd6c82 277
icraggs 8:c46930bd6c82 278
icraggs 8:c46930bd6c82 279 /**
icraggs 8:c46930bd6c82 280 * If any read fails in this method, then we should disconnect from the network, as on reconnect
icraggs 8:c46930bd6c82 281 * the packets can be retried.
icraggs 8:c46930bd6c82 282 * @param timeout the max time to wait for the packet read to complete, in milliseconds
icraggs 8:c46930bd6c82 283 * @return the MQTT packet type, or -1 if none
icraggs 8:c46930bd6c82 284 */
icraggs 23:05fc7de97d4a 285 template<class Network, class Timer, int a, int b>
icraggs 23:05fc7de97d4a 286 int MQTT::Client<Network, Timer, a, b>::readPacket(Timer& timer)
icraggs 8:c46930bd6c82 287 {
icraggs 26:2658bb87c53d 288 int rc = FAILURE;
icraggs 8:c46930bd6c82 289 MQTTHeader header = {0};
icraggs 8:c46930bd6c82 290 int len = 0;
icraggs 8:c46930bd6c82 291 int rem_len = 0;
icraggs 8:c46930bd6c82 292
icraggs 8:c46930bd6c82 293 /* 1. read the header byte. This has the packet type in it */
icraggs 23:05fc7de97d4a 294 if (ipstack.read(readbuf, 1, timer.left_ms()) != 1)
icraggs 8:c46930bd6c82 295 goto exit;
icraggs 8:c46930bd6c82 296
icraggs 8:c46930bd6c82 297 len = 1;
icraggs 8:c46930bd6c82 298 /* 2. read the remaining length. This is variable in itself */
icraggs 20:cad3d54d7ecf 299 decodePacket(&rem_len, timer.left_ms());
icraggs 8:c46930bd6c82 300 len += MQTTPacket_encode(readbuf + 1, rem_len); /* put the original remaining length back into the buffer */
icraggs 8:c46930bd6c82 301
icraggs 8:c46930bd6c82 302 /* 3. read the rest of the buffer using a callback to supply the rest of the data */
icraggs 23:05fc7de97d4a 303 if (ipstack.read(readbuf + len, rem_len, timer.left_ms()) != rem_len)
icraggs 8:c46930bd6c82 304 goto exit;
icraggs 8:c46930bd6c82 305
icraggs 8:c46930bd6c82 306 header.byte = readbuf[0];
icraggs 8:c46930bd6c82 307 rc = header.bits.type;
icraggs 8:c46930bd6c82 308 exit:
icraggs 8:c46930bd6c82 309 return rc;
icraggs 3:dbff6b768d28 310 }
icraggs 3:dbff6b768d28 311
icraggs 8:c46930bd6c82 312
icraggs 26:2658bb87c53d 313 // assume topic filter and name is in correct format
icraggs 26:2658bb87c53d 314 // # can only be at end
icraggs 26:2658bb87c53d 315 // + and # can only be next to separator
icraggs 26:2658bb87c53d 316 template<class Network, class Timer, int a, int b>
icraggs 26:2658bb87c53d 317 bool MQTT::Client<Network, Timer, a, b>::isTopicMatched(char* topicFilter, MQTTString& topicName)
icraggs 26:2658bb87c53d 318 {
icraggs 26:2658bb87c53d 319 char* curf = topicFilter;
icraggs 26:2658bb87c53d 320 char* curn = topicName.lenstring.data;
icraggs 26:2658bb87c53d 321 char* curn_end = curn + topicName.lenstring.len;
icraggs 26:2658bb87c53d 322
icraggs 26:2658bb87c53d 323 while (*curf && curn < curn_end)
icraggs 26:2658bb87c53d 324 {
icraggs 26:2658bb87c53d 325 if (*curn == '/' && *curf != '/')
icraggs 26:2658bb87c53d 326 break;
icraggs 26:2658bb87c53d 327 if (*curf != '+' && *curf != '#' && *curf != *curn)
icraggs 26:2658bb87c53d 328 break;
icraggs 26:2658bb87c53d 329 if (*curf == '+')
icraggs 26:2658bb87c53d 330 { // skip until we meet the next separator, or end of string
icraggs 26:2658bb87c53d 331 char* nextpos = curn + 1;
icraggs 26:2658bb87c53d 332 while (nextpos < curn_end && *nextpos != '/')
icraggs 26:2658bb87c53d 333 nextpos = ++curn + 1;
icraggs 26:2658bb87c53d 334 }
icraggs 26:2658bb87c53d 335 else if (*curf == '#')
icraggs 26:2658bb87c53d 336 curn = curn_end - 1; // skip until end of string
icraggs 26:2658bb87c53d 337 curf++;
icraggs 26:2658bb87c53d 338 curn++;
icraggs 26:2658bb87c53d 339 };
icraggs 26:2658bb87c53d 340
icraggs 26:2658bb87c53d 341 return (curn == curn_end) && (*curf == '\0');
icraggs 26:2658bb87c53d 342 }
icraggs 26:2658bb87c53d 343
icraggs 26:2658bb87c53d 344
icraggs 26:2658bb87c53d 345
icraggs 23:05fc7de97d4a 346 template<class Network, class Timer, int a, int MAX_MESSAGE_HANDLERS>
icraggs 26:2658bb87c53d 347 int MQTT::Client<Network, Timer, a, MAX_MESSAGE_HANDLERS>::deliverMessage(MQTTString& topicName, Message& message)
icraggs 15:64a57183aa03 348 {
icraggs 26:2658bb87c53d 349 int rc = FAILURE;
icraggs 20:cad3d54d7ecf 350
icraggs 20:cad3d54d7ecf 351 // we have to find the right message handler - indexed by topic
icraggs 23:05fc7de97d4a 352 for (int i = 0; i < MAX_MESSAGE_HANDLERS; ++i)
icraggs 20:cad3d54d7ecf 353 {
icraggs 26:2658bb87c53d 354 if (messageHandlers[i].topicFilter != 0 && (MQTTPacket_equals(&topicName, (char*)messageHandlers[i].topicFilter) ||
icraggs 26:2658bb87c53d 355 isTopicMatched((char*)messageHandlers[i].topicFilter, topicName)))
icraggs 20:cad3d54d7ecf 356 {
icraggs 26:2658bb87c53d 357 if (messageHandlers[i].fp.attached())
icraggs 26:2658bb87c53d 358 {
icraggs 31:a51dd239b78e 359 MessageData md(topicName, message);
icraggs 31:a51dd239b78e 360 messageHandlers[i].fp(md);
icraggs 26:2658bb87c53d 361 rc = SUCCESS;
icraggs 26:2658bb87c53d 362 }
icraggs 20:cad3d54d7ecf 363 }
icraggs 20:cad3d54d7ecf 364 }
icraggs 26:2658bb87c53d 365
icraggs 26:2658bb87c53d 366 if (rc == FAILURE && defaultMessageHandler.attached())
icraggs 26:2658bb87c53d 367 {
icraggs 31:a51dd239b78e 368 MessageData md(topicName, message);
icraggs 31:a51dd239b78e 369 defaultMessageHandler(md);
icraggs 26:2658bb87c53d 370 rc = SUCCESS;
icraggs 26:2658bb87c53d 371 }
icraggs 20:cad3d54d7ecf 372
icraggs 20:cad3d54d7ecf 373 return rc;
icraggs 15:64a57183aa03 374 }
icraggs 15:64a57183aa03 375
icraggs 15:64a57183aa03 376
icraggs 20:cad3d54d7ecf 377
icraggs 23:05fc7de97d4a 378 template<class Network, class Timer, int a, int b>
icraggs 26:2658bb87c53d 379 int MQTT::Client<Network, Timer, a, b>::yield(int timeout_ms)
icraggs 20:cad3d54d7ecf 380 {
icraggs 26:2658bb87c53d 381 int rc = SUCCESS;
icraggs 20:cad3d54d7ecf 382 Timer timer = Timer();
icraggs 20:cad3d54d7ecf 383
icraggs 23:05fc7de97d4a 384 timer.countdown_ms(timeout_ms);
icraggs 20:cad3d54d7ecf 385 while (!timer.expired())
icraggs 26:2658bb87c53d 386 {
icraggs 26:2658bb87c53d 387 if (cycle(timer) == FAILURE)
icraggs 26:2658bb87c53d 388 {
icraggs 26:2658bb87c53d 389 rc = FAILURE;
icraggs 26:2658bb87c53d 390 break;
icraggs 26:2658bb87c53d 391 }
icraggs 26:2658bb87c53d 392 }
icraggs 26:2658bb87c53d 393
icraggs 26:2658bb87c53d 394 return rc;
icraggs 20:cad3d54d7ecf 395 }
icraggs 20:cad3d54d7ecf 396
icraggs 20:cad3d54d7ecf 397
icraggs 23:05fc7de97d4a 398 template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int b>
icraggs 23:05fc7de97d4a 399 int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::cycle(Timer& timer)
icraggs 8:c46930bd6c82 400 {
icraggs 8:c46930bd6c82 401 /* get one piece of work off the wire and one pass through */
icraggs 20:cad3d54d7ecf 402
Ian Craggs 12:cc7f2d62a393 403 // read the socket, see what work is due
icraggs 36:2f1ada427e56 404 unsigned short packet_type = readPacket(timer);
icraggs 15:64a57183aa03 405
icraggs 26:2658bb87c53d 406 int len = 0,
icraggs 26:2658bb87c53d 407 rc = SUCCESS;
icraggs 28:8b2abe9bd814 408
icraggs 8:c46930bd6c82 409 switch (packet_type)
icraggs 8:c46930bd6c82 410 {
icraggs 15:64a57183aa03 411 case CONNACK:
icraggs 8:c46930bd6c82 412 case PUBACK:
icraggs 8:c46930bd6c82 413 case SUBACK:
icraggs 8:c46930bd6c82 414 break;
icraggs 15:64a57183aa03 415 case PUBLISH:
icraggs 20:cad3d54d7ecf 416 MQTTString topicName;
icraggs 20:cad3d54d7ecf 417 Message msg;
icraggs 36:2f1ada427e56 418 if (MQTTDeserialize_publish((unsigned char*)&msg.dup, (int*)&msg.qos, (unsigned char*)&msg.retained, (unsigned short*)&msg.id, &topicName,
icraggs 36:2f1ada427e56 419 (unsigned char**)&msg.payload, (int*)&msg.payloadlen, readbuf, MAX_MQTT_PACKET_SIZE) != 1)
icraggs 26:2658bb87c53d 420 goto exit;
icraggs 31:a51dd239b78e 421 // if (msg.qos != QOS2)
icraggs 31:a51dd239b78e 422 deliverMessage(topicName, msg);
icraggs 31:a51dd239b78e 423 #if 0
icraggs 31:a51dd239b78e 424 else if (isQoS2msgidFree(msg.id))
icraggs 31:a51dd239b78e 425 {
icraggs 31:a51dd239b78e 426 UseQoS2msgid(msg.id);
icraggs 31:a51dd239b78e 427 deliverMessage(topicName, msg);
icraggs 31:a51dd239b78e 428 }
icraggs 31:a51dd239b78e 429 #endif
icraggs 20:cad3d54d7ecf 430 if (msg.qos != QOS0)
icraggs 20:cad3d54d7ecf 431 {
icraggs 20:cad3d54d7ecf 432 if (msg.qos == QOS1)
icraggs 23:05fc7de97d4a 433 len = MQTTSerialize_ack(buf, MAX_MQTT_PACKET_SIZE, PUBACK, 0, msg.id);
icraggs 20:cad3d54d7ecf 434 else if (msg.qos == QOS2)
icraggs 23:05fc7de97d4a 435 len = MQTTSerialize_ack(buf, MAX_MQTT_PACKET_SIZE, PUBREC, 0, msg.id);
icraggs 26:2658bb87c53d 436 if (len <= 0)
icraggs 26:2658bb87c53d 437 rc = FAILURE;
icraggs 26:2658bb87c53d 438 else
icraggs 26:2658bb87c53d 439 rc = sendPacket(len, timer);
icraggs 26:2658bb87c53d 440 if (rc == FAILURE)
icraggs 20:cad3d54d7ecf 441 goto exit; // there was a problem
icraggs 20:cad3d54d7ecf 442 }
Ian Craggs 12:cc7f2d62a393 443 break;
icraggs 15:64a57183aa03 444 case PUBREC:
icraggs 36:2f1ada427e56 445 unsigned short mypacketid;
icraggs 36:2f1ada427e56 446 unsigned char dup, type;
icraggs 26:2658bb87c53d 447 if (MQTTDeserialize_ack(&type, &dup, &mypacketid, readbuf, MAX_MQTT_PACKET_SIZE) != 1)
icraggs 26:2658bb87c53d 448 rc = FAILURE;
icraggs 26:2658bb87c53d 449 else if ((len = MQTTSerialize_ack(buf, MAX_MQTT_PACKET_SIZE, PUBREL, 0, mypacketid)) <= 0)
icraggs 26:2658bb87c53d 450 rc = FAILURE;
icraggs 26:2658bb87c53d 451 else if ((rc = sendPacket(len, timer)) != SUCCESS) // send the PUBREL packet
icraggs 26:2658bb87c53d 452 rc = FAILURE; // there was a problem
icraggs 26:2658bb87c53d 453 if (rc == FAILURE)
icraggs 20:cad3d54d7ecf 454 goto exit; // there was a problem
icraggs 8:c46930bd6c82 455 break;
icraggs 8:c46930bd6c82 456 case PUBCOMP:
icraggs 8:c46930bd6c82 457 break;
icraggs 15:64a57183aa03 458 case PINGRESP:
icraggs 20:cad3d54d7ecf 459 ping_outstanding = false;
icraggs 8:c46930bd6c82 460 break;
icraggs 15:64a57183aa03 461 }
icraggs 20:cad3d54d7ecf 462 keepalive();
Ian Craggs 12:cc7f2d62a393 463 exit:
icraggs 26:2658bb87c53d 464 if (rc == SUCCESS)
icraggs 26:2658bb87c53d 465 rc = packet_type;
icraggs 26:2658bb87c53d 466 return rc;
icraggs 15:64a57183aa03 467 }
icraggs 15:64a57183aa03 468
icraggs 15:64a57183aa03 469
icraggs 23:05fc7de97d4a 470 template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int b>
icraggs 23:05fc7de97d4a 471 int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::keepalive()
icraggs 15:64a57183aa03 472 {
icraggs 26:2658bb87c53d 473 int rc = FAILURE;
icraggs 15:64a57183aa03 474
icraggs 20:cad3d54d7ecf 475 if (keepAliveInterval == 0)
icraggs 26:2658bb87c53d 476 {
icraggs 26:2658bb87c53d 477 rc = SUCCESS;
icraggs 20:cad3d54d7ecf 478 goto exit;
icraggs 26:2658bb87c53d 479 }
icraggs 15:64a57183aa03 480
icraggs 20:cad3d54d7ecf 481 if (ping_timer.expired())
icraggs 20:cad3d54d7ecf 482 {
icraggs 26:2658bb87c53d 483 if (!ping_outstanding)
icraggs 20:cad3d54d7ecf 484 {
icraggs 20:cad3d54d7ecf 485 Timer timer = Timer(1000);
icraggs 23:05fc7de97d4a 486 int len = MQTTSerialize_pingreq(buf, MAX_MQTT_PACKET_SIZE);
icraggs 26:2658bb87c53d 487 if (len > 0 && (rc = sendPacket(len, timer)) == SUCCESS) // send the ping packet
icraggs 20:cad3d54d7ecf 488 ping_outstanding = true;
icraggs 20:cad3d54d7ecf 489 }
icraggs 20:cad3d54d7ecf 490 }
icraggs 15:64a57183aa03 491
icraggs 15:64a57183aa03 492 exit:
icraggs 20:cad3d54d7ecf 493 return rc;
icraggs 8:c46930bd6c82 494 }
icraggs 8:c46930bd6c82 495
icraggs 8:c46930bd6c82 496
icraggs 16:91c2f9a144d4 497 // only used in single-threaded mode where one command at a time is in process
icraggs 23:05fc7de97d4a 498 template<class Network, class Timer, int a, int b>
icraggs 23:05fc7de97d4a 499 int MQTT::Client<Network, Timer, a, b>::waitfor(int packet_type, Timer& timer)
icraggs 15:64a57183aa03 500 {
icraggs 26:2658bb87c53d 501 int rc = FAILURE;
icraggs 20:cad3d54d7ecf 502
icraggs 20:cad3d54d7ecf 503 do
icraggs 16:91c2f9a144d4 504 {
icraggs 20:cad3d54d7ecf 505 if (timer.expired())
icraggs 20:cad3d54d7ecf 506 break; // we timed out
icraggs 20:cad3d54d7ecf 507 }
icraggs 20:cad3d54d7ecf 508 while ((rc = cycle(timer)) != packet_type);
icraggs 20:cad3d54d7ecf 509
icraggs 20:cad3d54d7ecf 510 return rc;
icraggs 16:91c2f9a144d4 511 }
icraggs 16:91c2f9a144d4 512
icraggs 16:91c2f9a144d4 513
icraggs 23:05fc7de97d4a 514 template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int b>
icraggs 23:05fc7de97d4a 515 int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::connect(MQTTPacket_connectData* options)
icraggs 16:91c2f9a144d4 516 {
icraggs 23:05fc7de97d4a 517 Timer connect_timer = Timer(command_timeout_ms);
icraggs 26:2658bb87c53d 518 int rc = FAILURE;
icraggs 31:a51dd239b78e 519 MQTTPacket_connectData default_options = MQTTPacket_connectData_initializer;
icraggs 31:a51dd239b78e 520 int len = 0;
icraggs 31:a51dd239b78e 521
icraggs 31:a51dd239b78e 522 if (isconnected) // don't send connect packet again if we are already connected
icraggs 31:a51dd239b78e 523 goto exit;
icraggs 8:c46930bd6c82 524
icraggs 8:c46930bd6c82 525 if (options == 0)
Ian Craggs 12:cc7f2d62a393 526 options = &default_options; // set default options if none were supplied
icraggs 8:c46930bd6c82 527
icraggs 15:64a57183aa03 528 this->keepAliveInterval = options->keepAliveInterval;
icraggs 20:cad3d54d7ecf 529 ping_timer.countdown(this->keepAliveInterval);
icraggs 31:a51dd239b78e 530 if ((len = MQTTSerialize_connect(buf, MAX_MQTT_PACKET_SIZE, options)) <= 0)
icraggs 26:2658bb87c53d 531 goto exit;
icraggs 26:2658bb87c53d 532 if ((rc = sendPacket(len, connect_timer)) != SUCCESS) // send the connect packet
icraggs 20:cad3d54d7ecf 533 goto exit; // there was a problem
icraggs 8:c46930bd6c82 534
icraggs 20:cad3d54d7ecf 535 // this will be a blocking call, wait for the connack
icraggs 20:cad3d54d7ecf 536 if (waitfor(CONNACK, connect_timer) == CONNACK)
icraggs 15:64a57183aa03 537 {
icraggs 36:2f1ada427e56 538 unsigned char connack_rc = 255;
icraggs 37:e3d64f9b986c 539 bool sessionPresent = false;
icraggs 37:e3d64f9b986c 540 if (MQTTDeserialize_connack((unsigned char*)&sessionPresent, &connack_rc, readbuf, MAX_MQTT_PACKET_SIZE) == 1)
icraggs 20:cad3d54d7ecf 541 rc = connack_rc;
icraggs 26:2658bb87c53d 542 else
icraggs 26:2658bb87c53d 543 rc = FAILURE;
icraggs 8:c46930bd6c82 544 }
icraggs 26:2658bb87c53d 545 else
icraggs 26:2658bb87c53d 546 rc = FAILURE;
icraggs 15:64a57183aa03 547
icraggs 15:64a57183aa03 548 exit:
icraggs 26:2658bb87c53d 549 if (rc == SUCCESS)
icraggs 26:2658bb87c53d 550 isconnected = true;
icraggs 8:c46930bd6c82 551 return rc;
icraggs 8:c46930bd6c82 552 }
icraggs 8:c46930bd6c82 553
icraggs 8:c46930bd6c82 554
icraggs 23:05fc7de97d4a 555 template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int MAX_MESSAGE_HANDLERS>
icraggs 23:05fc7de97d4a 556 int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, MAX_MESSAGE_HANDLERS>::subscribe(const char* topicFilter, enum QoS qos, messageHandler messageHandler)
icraggs 20:cad3d54d7ecf 557 {
icraggs 31:a51dd239b78e 558 int rc = FAILURE;
icraggs 23:05fc7de97d4a 559 Timer timer = Timer(command_timeout_ms);
icraggs 26:2658bb87c53d 560 int len = 0;
icraggs 31:a51dd239b78e 561 MQTTString topic = {(char*)topicFilter, 0, 0};
icraggs 20:cad3d54d7ecf 562
icraggs 26:2658bb87c53d 563 if (!isconnected)
icraggs 20:cad3d54d7ecf 564 goto exit;
icraggs 26:2658bb87c53d 565
icraggs 26:2658bb87c53d 566 len = MQTTSerialize_subscribe(buf, MAX_MQTT_PACKET_SIZE, 0, packetid.getNext(), 1, &topic, (int*)&qos);
icraggs 26:2658bb87c53d 567 if (len <= 0)
icraggs 26:2658bb87c53d 568 goto exit;
icraggs 23:05fc7de97d4a 569 if ((rc = sendPacket(len, timer)) != SUCCESS) // send the subscribe packet
icraggs 26:2658bb87c53d 570 goto exit; // there was a problem
icraggs 8:c46930bd6c82 571
icraggs 20:cad3d54d7ecf 572 if (waitfor(SUBACK, timer) == SUBACK) // wait for suback
icraggs 8:c46930bd6c82 573 {
icraggs 36:2f1ada427e56 574 int count = 0, grantedQoS = -1;
icraggs 36:2f1ada427e56 575 unsigned short mypacketid;
icraggs 23:05fc7de97d4a 576 if (MQTTDeserialize_suback(&mypacketid, 1, &count, &grantedQoS, readbuf, MAX_MQTT_PACKET_SIZE) == 1)
icraggs 20:cad3d54d7ecf 577 rc = grantedQoS; // 0, 1, 2 or 0x80
icraggs 20:cad3d54d7ecf 578 if (rc != 0x80)
icraggs 8:c46930bd6c82 579 {
icraggs 23:05fc7de97d4a 580 for (int i = 0; i < MAX_MESSAGE_HANDLERS; ++i)
icraggs 16:91c2f9a144d4 581 {
icraggs 26:2658bb87c53d 582 if (messageHandlers[i].topicFilter == 0)
icraggs 20:cad3d54d7ecf 583 {
icraggs 26:2658bb87c53d 584 messageHandlers[i].topicFilter = topicFilter;
icraggs 20:cad3d54d7ecf 585 messageHandlers[i].fp.attach(messageHandler);
icraggs 20:cad3d54d7ecf 586 rc = 0;
icraggs 20:cad3d54d7ecf 587 break;
icraggs 20:cad3d54d7ecf 588 }
icraggs 16:91c2f9a144d4 589 }
icraggs 8:c46930bd6c82 590 }
icraggs 8:c46930bd6c82 591 }
icraggs 26:2658bb87c53d 592 else
icraggs 26:2658bb87c53d 593 rc = FAILURE;
icraggs 26:2658bb87c53d 594
icraggs 15:64a57183aa03 595 exit:
Ian Craggs 12:cc7f2d62a393 596 return rc;
icraggs 15:64a57183aa03 597 }
icraggs 15:64a57183aa03 598
icraggs 15:64a57183aa03 599
icraggs 23:05fc7de97d4a 600 template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int MAX_MESSAGE_HANDLERS>
icraggs 23:05fc7de97d4a 601 int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, MAX_MESSAGE_HANDLERS>::unsubscribe(const char* topicFilter)
icraggs 20:cad3d54d7ecf 602 {
icraggs 26:2658bb87c53d 603 int rc = FAILURE;
icraggs 31:a51dd239b78e 604 Timer timer = Timer(command_timeout_ms);
Ian Craggs 12:cc7f2d62a393 605 MQTTString topic = {(char*)topicFilter, 0, 0};
icraggs 31:a51dd239b78e 606 int len = 0;
icraggs 8:c46930bd6c82 607
icraggs 31:a51dd239b78e 608 if (!isconnected)
icraggs 31:a51dd239b78e 609 goto exit;
icraggs 31:a51dd239b78e 610
icraggs 31:a51dd239b78e 611 if ((len = MQTTSerialize_unsubscribe(buf, MAX_MQTT_PACKET_SIZE, 0, packetid.getNext(), 1, &topic)) <= 0)
icraggs 20:cad3d54d7ecf 612 goto exit;
icraggs 23:05fc7de97d4a 613 if ((rc = sendPacket(len, timer)) != SUCCESS) // send the subscribe packet
icraggs 20:cad3d54d7ecf 614 goto exit; // there was a problem
Ian Craggs 12:cc7f2d62a393 615
icraggs 20:cad3d54d7ecf 616 if (waitfor(UNSUBACK, timer) == UNSUBACK)
Ian Craggs 12:cc7f2d62a393 617 {
icraggs 36:2f1ada427e56 618 unsigned short mypacketid; // should be the same as the packetid above
icraggs 23:05fc7de97d4a 619 if (MQTTDeserialize_unsuback(&mypacketid, readbuf, MAX_MQTT_PACKET_SIZE) == 1)
icraggs 20:cad3d54d7ecf 620 rc = 0;
Ian Craggs 12:cc7f2d62a393 621 }
icraggs 26:2658bb87c53d 622 else
icraggs 26:2658bb87c53d 623 rc = FAILURE;
icraggs 15:64a57183aa03 624
icraggs 15:64a57183aa03 625 exit:
Ian Craggs 12:cc7f2d62a393 626 return rc;
icraggs 15:64a57183aa03 627 }
icraggs 15:64a57183aa03 628
icraggs 15:64a57183aa03 629
icraggs 15:64a57183aa03 630
icraggs 23:05fc7de97d4a 631 template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int b>
icraggs 23:05fc7de97d4a 632 int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::publish(const char* topicName, Message* message)
icraggs 20:cad3d54d7ecf 633 {
icraggs 26:2658bb87c53d 634 int rc = FAILURE;
icraggs 31:a51dd239b78e 635 Timer timer = Timer(command_timeout_ms);
icraggs 31:a51dd239b78e 636 MQTTString topicString = {(char*)topicName, 0, 0};
icraggs 31:a51dd239b78e 637 int len = 0;
icraggs 20:cad3d54d7ecf 638
icraggs 31:a51dd239b78e 639 if (!isconnected)
icraggs 31:a51dd239b78e 640 goto exit;
icraggs 15:64a57183aa03 641
icraggs 20:cad3d54d7ecf 642 if (message->qos == QOS1 || message->qos == QOS2)
icraggs 20:cad3d54d7ecf 643 message->id = packetid.getNext();
icraggs 15:64a57183aa03 644
icraggs 31:a51dd239b78e 645 len = MQTTSerialize_publish(buf, MAX_MQTT_PACKET_SIZE, 0, message->qos, message->retained, message->id,
icraggs 36:2f1ada427e56 646 topicString, (unsigned char*)message->payload, message->payloadlen);
icraggs 26:2658bb87c53d 647 if (len <= 0)
icraggs 26:2658bb87c53d 648 goto exit;
icraggs 26:2658bb87c53d 649 if ((rc = sendPacket(len, timer)) != SUCCESS) // send the subscribe packet
icraggs 20:cad3d54d7ecf 650 goto exit; // there was a problem
Ian Craggs 12:cc7f2d62a393 651
icraggs 20:cad3d54d7ecf 652 if (message->qos == QOS1)
Ian Craggs 12:cc7f2d62a393 653 {
icraggs 20:cad3d54d7ecf 654 if (waitfor(PUBACK, timer) == PUBACK)
icraggs 20:cad3d54d7ecf 655 {
icraggs 36:2f1ada427e56 656 unsigned short mypacketid;
icraggs 36:2f1ada427e56 657 unsigned char dup, type;
icraggs 26:2658bb87c53d 658 if (MQTTDeserialize_ack(&type, &dup, &mypacketid, readbuf, MAX_MQTT_PACKET_SIZE) != 1)
icraggs 26:2658bb87c53d 659 rc = FAILURE;
icraggs 20:cad3d54d7ecf 660 }
icraggs 26:2658bb87c53d 661 else
icraggs 26:2658bb87c53d 662 rc = FAILURE;
Ian Craggs 12:cc7f2d62a393 663 }
icraggs 20:cad3d54d7ecf 664 else if (message->qos == QOS2)
Ian Craggs 12:cc7f2d62a393 665 {
icraggs 20:cad3d54d7ecf 666 if (waitfor(PUBCOMP, timer) == PUBCOMP)
icraggs 20:cad3d54d7ecf 667 {
icraggs 36:2f1ada427e56 668 unsigned short mypacketid;
icraggs 36:2f1ada427e56 669 unsigned char dup, type;
icraggs 26:2658bb87c53d 670 if (MQTTDeserialize_ack(&type, &dup, &mypacketid, readbuf, MAX_MQTT_PACKET_SIZE) != 1)
icraggs 26:2658bb87c53d 671 rc = FAILURE;
icraggs 20:cad3d54d7ecf 672 }
icraggs 26:2658bb87c53d 673 else
icraggs 26:2658bb87c53d 674 rc = FAILURE;
Ian Craggs 12:cc7f2d62a393 675 }
icraggs 15:64a57183aa03 676
icraggs 15:64a57183aa03 677 exit:
icraggs 8:c46930bd6c82 678 return rc;
icraggs 8:c46930bd6c82 679 }
icraggs 8:c46930bd6c82 680
icraggs 8:c46930bd6c82 681
icraggs 23:05fc7de97d4a 682 template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int b>
icraggs 23:05fc7de97d4a 683 int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::disconnect()
icraggs 20:cad3d54d7ecf 684 {
icraggs 26:2658bb87c53d 685 int rc = FAILURE;
icraggs 23:05fc7de97d4a 686 Timer timer = Timer(command_timeout_ms); // we might wait for incomplete incoming publishes to complete
icraggs 23:05fc7de97d4a 687 int len = MQTTSerialize_disconnect(buf, MAX_MQTT_PACKET_SIZE);
icraggs 26:2658bb87c53d 688 if (len > 0)
icraggs 26:2658bb87c53d 689 rc = sendPacket(len, timer); // send the disconnect packet
icraggs 31:a51dd239b78e 690
icraggs 31:a51dd239b78e 691 isconnected = false;
icraggs 23:05fc7de97d4a 692 return rc;
icraggs 20:cad3d54d7ecf 693 }
icraggs 20:cad3d54d7ecf 694
icraggs 20:cad3d54d7ecf 695
icraggs 20:cad3d54d7ecf 696 #endif