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Dependencies:   C12832_lcd EthernetInterface StatusReporter LM75B MQTT-ansond endpoint_core endpoint_mqtt mbed-rtos mbed

MQTTTransport.cpp@129:c4fa24308e33, 2014-03-16 (annotated)

Committer:
ansond
Date:
Sun Mar 16 17:30:59 2014 +0000
Revision:
129:c4fa24308e33
Parent:
93:e3b732068ae9
Child:
130:9c52e163e733
updates

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ansond 0:ae2a45502448 1 /* Copyright C2013 Doug Anson, MIT License
ansond 0:ae2a45502448 2 *
ansond 0:ae2a45502448 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
ansond 0:ae2a45502448 4 * and associated documentation files the "Software", to deal in the Software without restriction,
ansond 0:ae2a45502448 5 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
ansond 0:ae2a45502448 6 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
ansond 0:ae2a45502448 7 * furnished to do so, subject to the following conditions:
ansond 0:ae2a45502448 8 *
ansond 0:ae2a45502448 9 * The above copyright notice and this permission notice shall be included in all copies or
ansond 0:ae2a45502448 10 * substantial portions of the Software.
ansond 0:ae2a45502448 11 *
ansond 0:ae2a45502448 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
ansond 0:ae2a45502448 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
ansond 0:ae2a45502448 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
ansond 0:ae2a45502448 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
ansond 0:ae2a45502448 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
ansond 0:ae2a45502448 17 */
ansond 0:ae2a45502448 18
ansond 0:ae2a45502448 19 #include "MQTTTransport.h"
ansond 0:ae2a45502448 20
ansond 4:11f00b499106 21 // Endpoint Support
ansond 0:ae2a45502448 22 #include "MBEDEndpoint.h"
ansond 0:ae2a45502448 23
ansond 8:45f9a920e82c 24 // EmulatedResourceFactory support
ansond 8:45f9a920e82c 25 #include "EmulatedResourceFactory.h"
ansond 69:090e16acccb7 26
ansond 0:ae2a45502448 27 // our transmitt instance
ansond 15:e44d75d95b38 28 MQTTTransport *_mqtt_instance = NULL;
ansond 0:ae2a45502448 29
ansond 0:ae2a45502448 30 // MQTT callback to handle received messages
ansond 0:ae2a45502448 31 void _mqtt_message_handler(char *topic,char *payload,unsigned int length) {
ansond 129:c4fa24308e33 32 if (_mqtt_instance != NULL) {
ansond 129:c4fa24308e33 33 if (_mqtt_instance->isPongMessage(topic,payload,length)) _mqtt_instance->processPongMessage(payload,length);
ansond 129:c4fa24308e33 34 else _mqtt_instance->processMessage(_mqtt_instance->getEndpointNameFromTopic(topic),payload,length);
ansond 129:c4fa24308e33 35 }
ansond 0:ae2a45502448 36 }
ansond 0:ae2a45502448 37
ansond 0:ae2a45502448 38 // our MQTT client endpoint
ansond 0:ae2a45502448 39 PubSubClient _mqtt(MQTT_HOSTNAME,MQTT_HOSTPORT,_mqtt_message_handler);
ansond 0:ae2a45502448 40
ansond 0:ae2a45502448 41 // default constructor
ansond 15:e44d75d95b38 42 MQTTTransport::MQTTTransport(ErrorHandler *error_handler,void *endpoint,MBEDToIOCResourceMap *map) : Transport(error_handler,endpoint) {
ansond 0:ae2a45502448 43 this->m_mqtt = NULL;
ansond 15:e44d75d95b38 44 _mqtt_instance = this;
ansond 15:e44d75d95b38 45 this->m_map = map;
ansond 129:c4fa24308e33 46 this->m_ping_counter = 1;
ansond 129:c4fa24308e33 47 this->m_ping_countdown = MQTT_PING_COUNTDOWN;
ansond 8:45f9a920e82c 48 this->initTopic();
ansond 0:ae2a45502448 49 }
ansond 0:ae2a45502448 50
ansond 0:ae2a45502448 51 // default destructor
ansond 0:ae2a45502448 52 MQTTTransport::~MQTTTransport() {
ansond 0:ae2a45502448 53 this->disconnect();
ansond 0:ae2a45502448 54 }
ansond 0:ae2a45502448 55
ansond 8:45f9a920e82c 56 // init our topic
ansond 8:45f9a920e82c 57 void MQTTTransport::initTopic() {
ansond 8:45f9a920e82c 58 MBEDEndpoint *endpoint = (MBEDEndpoint *)this->getEndpoint();
ansond 8:45f9a920e82c 59 char *endpoint_name = endpoint->getEndpointName();
ansond 8:45f9a920e82c 60 memset(this->m_topic,0,MQTT_IOC_TOPIC_LEN+1);
ansond 8:45f9a920e82c 61 sprintf(this->m_topic,MQTT_IOC_TOPIC,endpoint_name);
ansond 8:45f9a920e82c 62 }
ansond 8:45f9a920e82c 63
ansond 8:45f9a920e82c 64 // get our topic
ansond 8:45f9a920e82c 65 char *MQTTTransport::getTopic() { return this->m_topic; }
ansond 8:45f9a920e82c 66
ansond 15:e44d75d95b38 67 // get the IOC <--> MBED resource map
ansond 15:e44d75d95b38 68 MBEDToIOCResourceMap *MQTTTransport::getMap() { return this->m_map; }
ansond 15:e44d75d95b38 69
ansond 6:34c07e145caa 70 // pull the endpoint name from the MQTT topic
ansond 6:34c07e145caa 71 char *MQTTTransport::getEndpointNameFromTopic(char *topic) {
ansond 48:d3663434128d 72 if (topic != NULL) {
ansond 48:d3663434128d 73 memset(this->m_endpoint_name,0,LIGHT_NAME_LEN+1);
ansond 69:090e16acccb7 74 char trash[MQTT_IOC_TOPIC_LEN+1];
ansond 69:090e16acccb7 75 char ep[MQTT_IOC_TOPIC_LEN+1];
ansond 69:090e16acccb7 76 memset(trash,0,MQTT_IOC_TOPIC_LEN+1);
ansond 69:090e16acccb7 77 memset(ep,0,MQTT_IOC_TOPIC_LEN+1);
ansond 69:090e16acccb7 78 bool done = false;
ansond 69:090e16acccb7 79 int length = 0; if (topic != NULL) length = strlen(topic);
ansond 69:090e16acccb7 80 for(int i=length-1;i>=0 && !done;--i) if (topic[i] == '/') { topic[i] = ' ' ; done = true; }
ansond 69:090e16acccb7 81 sscanf(topic,"%s%s",trash,ep);
ansond 69:090e16acccb7 82 if (strlen(ep) > 0) {
ansond 69:090e16acccb7 83 if (strcmp(ep,MQTT_IOC_ALL_ENDPOINT) != 0) {
ansond 69:090e16acccb7 84 // just insert the name and let the parser determine if its for us or not...
ansond 69:090e16acccb7 85 strncpy(this->m_endpoint_name,ep,strlen(ep));
ansond 69:090e16acccb7 86 }
ansond 69:090e16acccb7 87 else {
ansond 69:090e16acccb7 88 // this is a broadcast message - so we need to process it
ansond 69:090e16acccb7 89 MBEDEndpoint *endpoint = (MBEDEndpoint *)this->getEndpoint();
ansond 69:090e16acccb7 90 char *endpoint_name = endpoint->getEndpointName();
ansond 69:090e16acccb7 91 strcpy(this->m_endpoint_name,endpoint_name);
ansond 69:090e16acccb7 92 }
ansond 48:d3663434128d 93 }
ansond 89:6e7dd4cba216 94 //this->logger()->log("MQTT Topic (discovered): %s Original: %s",this->m_endpoint_name,topic);
ansond 48:d3663434128d 95 return this->m_endpoint_name;
ansond 48:d3663434128d 96 }
ansond 89:6e7dd4cba216 97 //this->logger()->log("MQTT Topic (discovered): NULL Original: %s",topic);
ansond 48:d3663434128d 98 return NULL;
ansond 6:34c07e145caa 99 }
ansond 6:34c07e145caa 100
ansond 0:ae2a45502448 101 // process a MQTT Message
ansond 69:090e16acccb7 102 void MQTTTransport::processMessage(char *message_name,char *payload, unsigned int payload_length) {
ansond 69:090e16acccb7 103 char message_type[MQTT_PAYLOAD_SEGMENT_LEN+1];
ansond 69:090e16acccb7 104 char message_verb[MQTT_PAYLOAD_SEGMENT_LEN+1];
ansond 69:090e16acccb7 105 char message_value[MQTT_PAYLOAD_SEGMENT_LEN+1];
ansond 69:090e16acccb7 106 char message_opt[MQTT_PAYLOAD_SEGMENT_LEN+1];
ansond 69:090e16acccb7 107
ansond 69:090e16acccb7 108 // initialize
ansond 69:090e16acccb7 109 memset(message_type,0,MQTT_PAYLOAD_SEGMENT_LEN+1);
ansond 69:090e16acccb7 110 memset(message_verb,0,MQTT_PAYLOAD_SEGMENT_LEN+1);
ansond 69:090e16acccb7 111 memset(message_value,0,MQTT_PAYLOAD_SEGMENT_LEN+1);
ansond 69:090e16acccb7 112 memset(message_opt,0,MQTT_PAYLOAD_SEGMENT_LEN+1);
ansond 23:793b2898522e 113
ansond 6:34c07e145caa 114 // get our endpoint
ansond 0:ae2a45502448 115 MBEDEndpoint *endpoint = (MBEDEndpoint *)this->getEndpoint();
ansond 7:f570eb3f38cd 116 char *endpoint_name = endpoint->getEndpointName();
ansond 6:34c07e145caa 117
ansond 0:ae2a45502448 118 // DEBUG
ansond 8:45f9a920e82c 119 //this->logger()->log("Endpoint:[%s] Target: [%s]",endpoint_name,message_name);
ansond 7:f570eb3f38cd 120
ansond 3:3db076b9d380 121 // only respond if its for our node
ansond 8:45f9a920e82c 122 if (strcmp(endpoint_name,message_name) == 0) {
ansond 69:090e16acccb7 123 // format of the MQTT message: message_type:verb|Parameter_X:value|keyword:optional_data
ansond 69:090e16acccb7 124 char buffer[MAX_MQTT_MESSAGE_LENGTH+1];
ansond 69:090e16acccb7 125 memset(buffer,0,MAX_MQTT_MESSAGE_LENGTH+1);
ansond 69:090e16acccb7 126 memcpy(buffer,payload,payload_length);
ansond 69:090e16acccb7 127 int count = 0; for(int i=0;i<payload_length;++i) if (payload[i] == ':') ++count;
ansond 72:ffd155ec8b93 128 for(int i=0;i<payload_length;++i) {
ansond 72:ffd155ec8b93 129 if (buffer[i] == ':') {
ansond 72:ffd155ec8b93 130 if (i < (payload_length-1)) buffer[i] = ' ';
ansond 72:ffd155ec8b93 131 else buffer[i] = '\0';
ansond 72:ffd155ec8b93 132 }
ansond 72:ffd155ec8b93 133 }
ansond 69:090e16acccb7 134 if (count == 1) sscanf(buffer,"%s %s",message_type,message_verb);
ansond 70:144f578e4470 135 if (count == 2) sscanf(buffer,"%s %s %s",message_type,message_verb,message_value);
ansond 71:221500a073df 136 if (count == 3) sscanf(buffer,"%s %s %s %s",message_type,message_verb,message_value,message_opt);
ansond 69:090e16acccb7 137
ansond 7:f570eb3f38cd 138 // DEBUG
ansond 72:ffd155ec8b93 139 //this->logger()->log("Raw Payload: %s, length: %d",payload,payload_length);
ansond 72:ffd155ec8b93 140 //this->logger()->log("Buffer: %s, length: %d",buffer,strlen(buffer));
ansond 72:ffd155ec8b93 141 //this->logger()->log("Parsed Payload: Type: [%s] Name: [%s] Verb: [%s] Value: [%s]",message_type,message_name,message_verb,message_value);
ansond 8:45f9a920e82c 142
ansond 3:3db076b9d380 143 // load endpoints
ansond 15:e44d75d95b38 144 if (message_type != NULL && strcmp(message_type,IOC_ENDPOINT_VERB) == 0) { // Endpoint
ansond 15:e44d75d95b38 145 if (message_verb != NULL && strcmp(message_verb,IOC_REQUEST_LOAD_ALL_VERB) == 0) { // load
ansond 15:e44d75d95b38 146 if (message_value != NULL && strcmp(message_value,IOC_ENDPOINT_ALL_VERB) == 0) { // all
ansond 15:e44d75d95b38 147 // load up our endpoints
ansond 15:e44d75d95b38 148 endpoint->loadEndpoints();
ansond 0:ae2a45502448 149 }
ansond 93:e3b732068ae9 150 else if (message_value != NULL && strcmp(message_value,this->m_endpoint_name) == 0) {
ansond 93:e3b732068ae9 151 // load up our endpoints (us only)
ansond 93:e3b732068ae9 152 endpoint->loadEndpoints();
ansond 93:e3b732068ae9 153 }
ansond 0:ae2a45502448 154 }
ansond 15:e44d75d95b38 155
ansond 15:e44d75d95b38 156 else if (message_verb != NULL && strcmp(message_verb,IOC_REQUEST_UPDATE_ALL_VERB) == 0) { // update
ansond 15:e44d75d95b38 157 if (message_value != NULL && strcmp(message_value,IOC_ENDPOINT_ALL_VERB) == 0) { // all
ansond 15:e44d75d95b38 158 // update our endpoints
ansond 23:793b2898522e 159 endpoint->updateEndpoints();
ansond 15:e44d75d95b38 160 }
ansond 15:e44d75d95b38 161 else {
ansond 15:e44d75d95b38 162 // update just our endpoint
ansond 15:e44d75d95b38 163 int index = -1;
ansond 15:e44d75d95b38 164 if (message_name != NULL) {
ansond 15:e44d75d95b38 165 index = endpoint->indexOfLight((char *)message_name);
ansond 15:e44d75d95b38 166 if (index >= 0) {
ansond 15:e44d75d95b38 167 if (message_verb != NULL && strcmp(message_verb,IOC_REQUEST_UPDATE_ALL_VERB) == 0) {
ansond 15:e44d75d95b38 168 // update our endpoint
ansond 23:793b2898522e 169 endpoint->updateEndpoints(index);
ansond 15:e44d75d95b38 170 }
ansond 3:3db076b9d380 171 }
ansond 3:3db076b9d380 172 }
ansond 3:3db076b9d380 173 }
ansond 3:3db076b9d380 174 }
ansond 0:ae2a45502448 175 }
ansond 3:3db076b9d380 176
ansond 3:3db076b9d380 177 // change a resource value
ansond 13:25448d92c205 178 if (message_type != NULL && strcmp(message_type,IOC_CHANGE_VERB) == 0) {
ansond 8:45f9a920e82c 179 if (message_name != NULL) {
ansond 3:3db076b9d380 180 // destined for our lights?
ansond 3:3db076b9d380 181 int index = endpoint->indexOfLight((char *)message_name);
ansond 3:3db076b9d380 182 if (index >= 0) {
ansond 3:3db076b9d380 183 if (message_verb != NULL) {
ansond 3:3db076b9d380 184 // map the parameter to one of ours
ansond 14:0a6497a380a4 185 char *mapped_resource = this->mapIOCResourceToEndpointResource((char *)message_verb);
ansond 3:3db076b9d380 186 if (mapped_resource != NULL) {
ansond 3:3db076b9d380 187 if (message_value != NULL) {
ansond 8:45f9a920e82c 188 EmulatedResourceFactory *factory = (EmulatedResourceFactory *)endpoint->getResources(index);
ansond 8:45f9a920e82c 189 bool success = factory->setResourceValue(mapped_resource,message_value);
ansond 8:45f9a920e82c 190
ansond 8:45f9a920e82c 191 // end the resource value back over MQTT
ansond 8:45f9a920e82c 192 this->sendResult(message_name,message_verb,message_value,success);
ansond 3:3db076b9d380 193 }
ansond 3:3db076b9d380 194 }
ansond 3:3db076b9d380 195 }
ansond 3:3db076b9d380 196 }
ansond 3:3db076b9d380 197 }
ansond 3:3db076b9d380 198 }
ansond 3:3db076b9d380 199
ansond 3:3db076b9d380 200 // get a resource value
ansond 13:25448d92c205 201 if (message_type != NULL && strcmp(message_type,IOC_REQUEST_VALUE_VERB) == 0) {
ansond 3:3db076b9d380 202 if (message_name != NULL) {
ansond 3:3db076b9d380 203 // destined for our lights?
ansond 3:3db076b9d380 204 int index = endpoint->indexOfLight((char *)message_name);
ansond 3:3db076b9d380 205 if (index >= 0) {
ansond 3:3db076b9d380 206 if (message_verb != NULL) {
ansond 3:3db076b9d380 207 // map the parameter to one of ours
ansond 13:25448d92c205 208 char *mapped_resource = this->mapIOCResourceToEndpointResource((char *)message_verb);
ansond 3:3db076b9d380 209 if (mapped_resource != NULL) {
ansond 8:45f9a920e82c 210 EmulatedResourceFactory *factory = (EmulatedResourceFactory *)endpoint->getResources(index);
ansond 69:090e16acccb7 211 strcpy(message_value,factory->getResourceValue((char *)mapped_resource));
ansond 8:45f9a920e82c 212 bool success = false; if (message_value != NULL) success = true;
ansond 8:45f9a920e82c 213
ansond 8:45f9a920e82c 214 // log resource get
ansond 8:45f9a920e82c 215 if (success) this->logger()->log("Resource: %s (%s) Value: %s",message_verb,mapped_resource,message_value);
ansond 3:3db076b9d380 216
ansond 3:3db076b9d380 217 // end the resource value back over MQTT
ansond 8:45f9a920e82c 218 this->sendResult(message_name,message_verb,message_value,success);
ansond 3:3db076b9d380 219 }
ansond 3:3db076b9d380 220 }
ansond 3:3db076b9d380 221 }
ansond 0:ae2a45502448 222 }
ansond 0:ae2a45502448 223 }
ansond 0:ae2a45502448 224 }
ansond 3:3db076b9d380 225 else {
ansond 3:3db076b9d380 226 // message not bound for our node
ansond 3:3db076b9d380 227 this->logger()->log("MQTT Message: %s not for us: %s... ignoring...",payload,endpoint_name);
ansond 7:f570eb3f38cd 228 }
ansond 0:ae2a45502448 229 }
ansond 0:ae2a45502448 230
ansond 8:45f9a920e82c 231 // send result back to MQTT
ansond 8:45f9a920e82c 232 void MQTTTransport::sendResult(char *endpoint_name,char *resource_name,char *value,bool success) {
ansond 8:45f9a920e82c 233 if (this->m_connected == true) {
ansond 8:45f9a920e82c 234 // send the response back to MQTT
ansond 8:45f9a920e82c 235 this->logger()->log("Sending Response back to MQTT...");
ansond 8:45f9a920e82c 236 char message[MAX_MQTT_MESSAGE_LENGTH+1];
ansond 8:45f9a920e82c 237 memset(message,0,MAX_MQTT_MESSAGE_LENGTH+1);
ansond 13:25448d92c205 238 char *str_success = IOC_RESPONSE_OK; if (!success) str_success = IOC_RESPONSE_FAILED;
ansond 13:25448d92c205 239 sprintf(message,IOC_RESPONSE_TEMPLATE,IOC_RESPONSE_VERB,endpoint_name,resource_name,value,str_success);
ansond 8:45f9a920e82c 240 bool sent = this->m_mqtt->publish(this->getTopic(),message,strlen(message));
ansond 8:45f9a920e82c 241 if (sent) {
ansond 8:45f9a920e82c 242 this->logger()->log("Result sent successfully");
ansond 36:210f3956038c 243 this->logger()->blinkTransportTxLED();
ansond 8:45f9a920e82c 244 }
ansond 8:45f9a920e82c 245 else {
ansond 8:45f9a920e82c 246 this->logger()->log("Result send FAILED");
ansond 8:45f9a920e82c 247 }
ansond 8:45f9a920e82c 248 }
ansond 8:45f9a920e82c 249 else {
ansond 8:45f9a920e82c 250 // unable to send the response
ansond 8:45f9a920e82c 251 this->logger()->log("Unable to send response back to MQTT. Not connected.");
ansond 8:45f9a920e82c 252 }
ansond 0:ae2a45502448 253 }
ansond 0:ae2a45502448 254
ansond 15:e44d75d95b38 255 char *MQTTTransport::mapIOCResourceToEndpointResource(char *ioc_name) { return this->getMap()->iocNameToEndpointName(ioc_name); }
ansond 0:ae2a45502448 256
ansond 0:ae2a45502448 257 char *MQTTTransport::makeID(char *id_template,char *buffer) {
ansond 0:ae2a45502448 258 srand(time(0));
ansond 0:ae2a45502448 259 srand(rand());
ansond 0:ae2a45502448 260 sprintf(buffer,id_template,rand()%MQTT_MAXID_VALUE);
ansond 0:ae2a45502448 261 return buffer;
ansond 0:ae2a45502448 262 }
ansond 0:ae2a45502448 263
ansond 129:c4fa24308e33 264 // is this message a PONG message?
ansond 129:c4fa24308e33 265 bool MQTTTransport::isPongMessage(char *topic,char *payload,int payload_length) {
ansond 129:c4fa24308e33 266 bool isPong = false;
ansond 129:c4fa24308e33 267 char verb[MQTT_PING_VERB_LEN+1];
ansond 129:c4fa24308e33 268 char ep_name[LIGHT_NAME_LEN+1];
ansond 129:c4fa24308e33 269 int counter = 0;
ansond 129:c4fa24308e33 270
ansond 129:c4fa24308e33 271 // clean
ansond 129:c4fa24308e33 272 memset(verb,0,MQTT_PING_VERB_LEN+1);
ansond 129:c4fa24308e33 273 memset(ep_name,0,LIGHT_NAME_LEN+1);
ansond 129:c4fa24308e33 274
ansond 129:c4fa24308e33 275 // make sure we have the right topic
ansond 129:c4fa24308e33 276 if (topic != NULL && strcmp(topic,MQTT_PING_TOPIC) == 0) {
ansond 129:c4fa24308e33 277 // parse the payload
ansond 129:c4fa24308e33 278 for(int i=0;payload != NULL && i<payload_length;++i) if (payload[i] == ':') payload[i] = ' ';
ansond 129:c4fa24308e33 279 sscanf(payload,"%s %s %d",verb,ep_name,&counter);
ansond 129:c4fa24308e33 280
ansond 129:c4fa24308e33 281 // check the contents to make sure its for us...
ansond 129:c4fa24308e33 282 if (strcmp(verb,"pong") == 0 && strcmp(ep_name,this->m_endpoint_name) == 0 && counter == this->m_ping_counter) {
ansond 129:c4fa24308e33 283 // its a PONG message to our PING...
ansond 129:c4fa24308e33 284 isPong = true;
ansond 129:c4fa24308e33 285 }
ansond 129:c4fa24308e33 286 }
ansond 129:c4fa24308e33 287
ansond 129:c4fa24308e33 288 // return isPong status
ansond 129:c4fa24308e33 289 return isPong;
ansond 129:c4fa24308e33 290 }
ansond 129:c4fa24308e33 291
ansond 129:c4fa24308e33 292
ansond 129:c4fa24308e33 293 // process this PONG message
ansond 129:c4fa24308e33 294 void MQTTTransport::processPongMessage(char *payload,int payload_length) {
ansond 129:c4fa24308e33 295 // DEBUG
ansond 129:c4fa24308e33 296 this->logger()->log("Received PONG: counter=%d",this->m_ping_counter);
ansond 129:c4fa24308e33 297
ansond 129:c4fa24308e33 298 // simply increment the counter
ansond 129:c4fa24308e33 299 ++this->m_ping_counter;
ansond 129:c4fa24308e33 300
ansond 129:c4fa24308e33 301 // reset counter if maxed
ansond 129:c4fa24308e33 302 if (this->m_ping_counter >= MQTT_MAX_COUNTER) this->m_ping_counter = 1;
ansond 129:c4fa24308e33 303 }
ansond 129:c4fa24308e33 304
ansond 129:c4fa24308e33 305 // send a PING message
ansond 129:c4fa24308e33 306 bool MQTTTransport::sendPingMessage() {
ansond 129:c4fa24308e33 307 bool sent = false;
ansond 129:c4fa24308e33 308 char message[MAX_MQTT_MESSAGE_LENGTH+1];
ansond 129:c4fa24308e33 309
ansond 129:c4fa24308e33 310 // initialize...
ansond 129:c4fa24308e33 311 memset(message,0,MAX_MQTT_MESSAGE_LENGTH+1);
ansond 129:c4fa24308e33 312
ansond 129:c4fa24308e33 313 // build message
ansond 129:c4fa24308e33 314 sprintf(message,"ping:%s:%d",this->m_endpoint_name,this->m_ping_counter);
ansond 129:c4fa24308e33 315
ansond 129:c4fa24308e33 316 // send the message over the ping/pong topic
ansond 129:c4fa24308e33 317 sent = this->m_mqtt->publish(MQTT_PING_TOPIC,message,strlen(message));
ansond 129:c4fa24308e33 318 if (sent) {
ansond 129:c4fa24308e33 319 // send succeeded
ansond 129:c4fa24308e33 320 this->logger()->log("PING %d sent successfully",this->m_ping_counter);
ansond 129:c4fa24308e33 321 this->logger()->blinkTransportTxLED();
ansond 129:c4fa24308e33 322 }
ansond 129:c4fa24308e33 323 else {
ansond 129:c4fa24308e33 324 // send failed! - reconnect
ansond 129:c4fa24308e33 325 this->logger()->log("PING send %d FAILED... (re)connecting...",this->m_ping_counter);
ansond 129:c4fa24308e33 326
ansond 129:c4fa24308e33 327 // attempt reconnect
ansond 129:c4fa24308e33 328 this->disconnect();
ansond 129:c4fa24308e33 329 sent = this->connect();
ansond 129:c4fa24308e33 330 if (sent) this->logger()->log("PING %d: MQTT reconnection successful...",this->m_ping_counter);
ansond 129:c4fa24308e33 331 }
ansond 129:c4fa24308e33 332
ansond 129:c4fa24308e33 333 // return our status
ansond 129:c4fa24308e33 334 return sent;
ansond 129:c4fa24308e33 335 }
ansond 129:c4fa24308e33 336
ansond 0:ae2a45502448 337 // connect up MQTT
ansond 0:ae2a45502448 338 bool MQTTTransport::connect() {
ansond 0:ae2a45502448 339 char mqtt_id[MQTT_ENDPOINT_IDLEN+1];
ansond 0:ae2a45502448 340 memset(mqtt_id,0,(MQTT_ENDPOINT_IDLEN+1));
ansond 0:ae2a45502448 341 if (this->m_connected == false) {
ansond 0:ae2a45502448 342 this->logger()->log("MQTT Init: %s:%d...",MQTT_HOSTNAME,MQTT_HOSTPORT);
ansond 0:ae2a45502448 343 this->m_mqtt = &_mqtt;
ansond 0:ae2a45502448 344 if (this->m_mqtt != NULL) {
ansond 0:ae2a45502448 345 char *id = this->makeID(MQTT_ENDPOINT_ID,mqtt_id);
ansond 0:ae2a45502448 346 this->logger()->log("MQTT Connect: ID: %s...",id);
ansond 0:ae2a45502448 347 if (this->m_mqtt->connect(id)) {
ansond 8:45f9a920e82c 348 this->logger()->log("MQTT Subscribe: Topic: %s...",this->getTopic());
ansond 8:45f9a920e82c 349 if (this->m_mqtt->subscribe(this->getTopic())) {
ansond 22:f1002e5993c5 350 if (this->m_mqtt->subscribe(MQTT_IOC_ANNOUNCE_TOPIC)) {
ansond 129:c4fa24308e33 351 if (this->m_mqtt->subscribe(MQTT_PING_TOPIC)) {
ansond 129:c4fa24308e33 352 this->logger()->log("MQTT CONNECTED.");
ansond 129:c4fa24308e33 353 this->m_connected = true;
ansond 129:c4fa24308e33 354 }
ansond 129:c4fa24308e33 355 else {
ansond 129:c4fa24308e33 356 this->logger()->log("MQTT Subscribe: Topic(PING): %s FAILED",MQTT_PING_TOPIC);
ansond 129:c4fa24308e33 357 this->logger()->turnLEDRed();
ansond 129:c4fa24308e33 358 this->m_connected = false;
ansond 129:c4fa24308e33 359 }
ansond 22:f1002e5993c5 360 }
ansond 22:f1002e5993c5 361 else {
ansond 129:c4fa24308e33 362 this->logger()->log("MQTT Subscribe: Topic(ANNOUNCE): %s FAILED",MQTT_IOC_ANNOUNCE_TOPIC);
ansond 22:f1002e5993c5 363 this->logger()->turnLEDRed();
ansond 22:f1002e5993c5 364 this->m_connected = false;
ansond 22:f1002e5993c5 365 }
ansond 0:ae2a45502448 366 }
ansond 0:ae2a45502448 367 else {
ansond 129:c4fa24308e33 368 this->logger()->log("MQTT Subscribe: Topic(ENDPOINT): %s FAILED",this->getTopic());
ansond 0:ae2a45502448 369 this->logger()->turnLEDRed();
ansond 7:f570eb3f38cd 370 this->m_connected = false;
ansond 0:ae2a45502448 371 }
ansond 0:ae2a45502448 372 }
ansond 0:ae2a45502448 373 else {
ansond 0:ae2a45502448 374 this->logger()->log("MQTT Connect: ID: %s FAILED",id);
ansond 0:ae2a45502448 375 this->logger()->turnLEDRed();
ansond 7:f570eb3f38cd 376 this->m_connected = false;
ansond 0:ae2a45502448 377 }
ansond 0:ae2a45502448 378 }
ansond 0:ae2a45502448 379 else {
ansond 0:ae2a45502448 380 this->logger()->log("MQTT Unable to allocate new instance");
ansond 0:ae2a45502448 381 this->logger()->turnLEDRed();
ansond 7:f570eb3f38cd 382 this->m_connected = false;
ansond 0:ae2a45502448 383 }
ansond 0:ae2a45502448 384 }
ansond 0:ae2a45502448 385 else {
ansond 0:ae2a45502448 386 this->logger()->log("MQTT already connected (OK)");
ansond 0:ae2a45502448 387 }
ansond 0:ae2a45502448 388 return this->m_connected;
ansond 0:ae2a45502448 389 }
ansond 0:ae2a45502448 390
ansond 0:ae2a45502448 391 // disconnect from MQTT
ansond 0:ae2a45502448 392 bool MQTTTransport::disconnect() {
ansond 0:ae2a45502448 393 if (this->m_mqtt != NULL) {
ansond 8:45f9a920e82c 394 this->logger()->log("MQTT Unsubscribing from: %s...",this->getTopic());
ansond 8:45f9a920e82c 395 this->m_mqtt->unsubscribe(this->getTopic());
ansond 129:c4fa24308e33 396 this->logger()->log("MQTT Unsubscribing from: %s...",MQTT_IOC_ANNOUNCE_TOPIC);
ansond 22:f1002e5993c5 397 this->m_mqtt->unsubscribe(MQTT_IOC_ANNOUNCE_TOPIC);
ansond 129:c4fa24308e33 398 this->logger()->log("MQTT Unsubscribing from: %s...",MQTT_PING_TOPIC);
ansond 129:c4fa24308e33 399 this->m_mqtt->unsubscribe(MQTT_PING_TOPIC);
ansond 0:ae2a45502448 400 this->logger()->log("MQTT Disconnecting...");
ansond 0:ae2a45502448 401 this->m_mqtt->disconnect();
ansond 0:ae2a45502448 402 }
ansond 0:ae2a45502448 403 else {
ansond 0:ae2a45502448 404 this->logger()->log("MQTT already disconnected (OK)");
ansond 0:ae2a45502448 405 }
ansond 0:ae2a45502448 406 this->m_connected = false;
ansond 0:ae2a45502448 407 return true;
ansond 0:ae2a45502448 408 }
ansond 0:ae2a45502448 409
ansond 0:ae2a45502448 410 // check transport and process stuff
ansond 0:ae2a45502448 411 void MQTTTransport::checkAndProcess() {
ansond 129:c4fa24308e33 412 // process any MQTT messages
ansond 0:ae2a45502448 413 if (this->m_mqtt != NULL && this->m_connected == true) {
ansond 0:ae2a45502448 414 this->m_mqtt->loop();
ansond 36:210f3956038c 415 this->logger()->blinkTransportRxLED();
ansond 0:ae2a45502448 416 }
ansond 129:c4fa24308e33 417
ansond 129:c4fa24308e33 418 // send a PING if time for it
ansond 129:c4fa24308e33 419 --this->m_ping_countdown;
ansond 129:c4fa24308e33 420 if (this->m_ping_countdown <= 0) {
ansond 129:c4fa24308e33 421 this->logger()->log("MQTT: Sending PING...");
ansond 129:c4fa24308e33 422 this->m_ping_countdown = MQTT_PING_COUNTDOWN;
ansond 129:c4fa24308e33 423 this->sendPingMessage();
ansond 129:c4fa24308e33 424 }
ansond 0:ae2a45502448 425 }