Chenliang Zhao / MQTTClient

MQTTClient

Dependencies:   mbed-http

MQTTClient.cpp@1:a50b6c866a3b, 2012-03-21 (annotated)

Committer:
SomeRandomBloke
Date:
Wed Mar 21 21:43:02 2012 +0000
Revision:
1:a50b6c866a3b
Parent:
0:260fb10c0755
Child:
2:92b9dd336375
Updated comments

Who changed what in which revision?

UserRevisionLine numberNew contents of line
SomeRandomBloke 0:260fb10c0755 1 /*
SomeRandomBloke 0:260fb10c0755 2 MQTTClient.cpp
SomeRandomBloke 0:260fb10c0755 3 Based on MQTTClient from http://ceit.uq.edu.au/content/mqttclient-mbed-version-20
SomeRandomBloke 0:260fb10c0755 4 A simple MQTT client for mbed, version 2.0
SomeRandomBloke 0:260fb10c0755 5 By Yilun FAN, @CEIT, @JAN 2011
SomeRandomBloke 0:260fb10c0755 6
SomeRandomBloke 0:260fb10c0755 7 Bug fixes and additions by Andrew Lindsay (andrew [at] thiseldo [dot] co [dot] uk)
SomeRandomBloke 0:260fb10c0755 8
SomeRandomBloke 0:260fb10c0755 9 Permission is hereby granted, free of charge, to any person obtaining a copy
SomeRandomBloke 0:260fb10c0755 10 of this software and associated documentation files (the "Software"), to deal
SomeRandomBloke 0:260fb10c0755 11 in the Software without restriction, including without limitation the rights
SomeRandomBloke 0:260fb10c0755 12 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
SomeRandomBloke 0:260fb10c0755 13 copies of the Software, and to permit persons to whom the Software is
SomeRandomBloke 0:260fb10c0755 14 furnished to do so, subject to the following conditions:
SomeRandomBloke 0:260fb10c0755 15
SomeRandomBloke 0:260fb10c0755 16 The above copyright notice and this permission notice shall be included in
SomeRandomBloke 0:260fb10c0755 17 all copies or substantial portions of the Software.
SomeRandomBloke 0:260fb10c0755 18
SomeRandomBloke 0:260fb10c0755 19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
SomeRandomBloke 0:260fb10c0755 20 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
SomeRandomBloke 0:260fb10c0755 21 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
SomeRandomBloke 0:260fb10c0755 22 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
SomeRandomBloke 0:260fb10c0755 23 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
SomeRandomBloke 0:260fb10c0755 24 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
SomeRandomBloke 0:260fb10c0755 25 THE SOFTWARE.
SomeRandomBloke 0:260fb10c0755 26 */
SomeRandomBloke 0:260fb10c0755 27
SomeRandomBloke 0:260fb10c0755 28 #include "MQTTClient.h"
SomeRandomBloke 0:260fb10c0755 29
SomeRandomBloke 1:a50b6c866a3b 30 /** Default Constructor
SomeRandomBloke 1:a50b6c866a3b 31 */
SomeRandomBloke 1:a50b6c866a3b 32 MQTTClient::MQTTClient() {}
SomeRandomBloke 1:a50b6c866a3b 33
SomeRandomBloke 1:a50b6c866a3b 34 /** Default Destructor
SomeRandomBloke 1:a50b6c866a3b 35 */
SomeRandomBloke 1:a50b6c866a3b 36 MQTTClient::~MQTTClient() {}
SomeRandomBloke 1:a50b6c866a3b 37
SomeRandomBloke 1:a50b6c866a3b 38 /** Constructor with parameters
SomeRandomBloke 1:a50b6c866a3b 39 *
SomeRandomBloke 1:a50b6c866a3b 40 * Allow object to be constructed with minimum parameters.
SomeRandomBloke 1:a50b6c866a3b 41 *
SomeRandomBloke 1:a50b6c866a3b 42 * @param server The IP address of the server to connect to
SomeRandomBloke 1:a50b6c866a3b 43 * @param port The TCP/IP port on the server to connect to
SomeRandomBloke 1:a50b6c866a3b 44 * @param callback Callback function to handle subscription to topics
SomeRandomBloke 1:a50b6c866a3b 45 */
SomeRandomBloke 0:260fb10c0755 46 MQTTClient::MQTTClient(IpAddr server, int port, void (*callback)(char*, char*)) {
SomeRandomBloke 0:260fb10c0755 47 this->port = port;
SomeRandomBloke 0:260fb10c0755 48 callback_server = callback;
SomeRandomBloke 0:260fb10c0755 49 serverIp = server;
SomeRandomBloke 0:260fb10c0755 50 connected = false;
SomeRandomBloke 0:260fb10c0755 51 sessionOpened = false;
SomeRandomBloke 0:260fb10c0755 52 timer.start();
SomeRandomBloke 0:260fb10c0755 53 }
SomeRandomBloke 0:260fb10c0755 54
SomeRandomBloke 0:260fb10c0755 55
SomeRandomBloke 1:a50b6c866a3b 56 /** MQTT initialisation method
SomeRandomBloke 1:a50b6c866a3b 57 *
SomeRandomBloke 1:a50b6c866a3b 58 * Used when default constructor used and need to specify parameters at runtime
SomeRandomBloke 1:a50b6c866a3b 59 *
SomeRandomBloke 1:a50b6c866a3b 60 * @param server The IP address of the server to connect to
SomeRandomBloke 1:a50b6c866a3b 61 * @param port The TCP/IP port on the server to connect to
SomeRandomBloke 1:a50b6c866a3b 62 * @param callback Callback function to handle subscription to topics
SomeRandomBloke 1:a50b6c866a3b 63 */
SomeRandomBloke 0:260fb10c0755 64 void MQTTClient::init(IpAddr *server, int port, void (*callback)(char*, char*)) {
SomeRandomBloke 0:260fb10c0755 65 this->port = port;
SomeRandomBloke 0:260fb10c0755 66 callback_server = callback;
SomeRandomBloke 0:260fb10c0755 67 serverIp = *server;
SomeRandomBloke 0:260fb10c0755 68 this->userName = NULL;
SomeRandomBloke 0:260fb10c0755 69 this->password = NULL;
SomeRandomBloke 0:260fb10c0755 70 connected = false;
SomeRandomBloke 0:260fb10c0755 71 sessionOpened = false;
SomeRandomBloke 0:260fb10c0755 72 timer.start();
SomeRandomBloke 0:260fb10c0755 73 }
SomeRandomBloke 0:260fb10c0755 74
SomeRandomBloke 1:a50b6c866a3b 75 /** A brief description of the function foo
SomeRandomBloke 1:a50b6c866a3b 76 *
SomeRandomBloke 1:a50b6c866a3b 77 * More details about the function goes here
SomeRandomBloke 1:a50b6c866a3b 78 * and here
SomeRandomBloke 1:a50b6c866a3b 79 *
SomeRandomBloke 1:a50b6c866a3b 80 * @param server The IP address of the server to connect to
SomeRandomBloke 1:a50b6c866a3b 81 * @param port The TCP/IP port on the server to connect to
SomeRandomBloke 1:a50b6c866a3b 82 * @param userName Pointer to username string, zero terminated. Null for not used
SomeRandomBloke 1:a50b6c866a3b 83 * @param password Pointer to password string, zero terminated. Null for not used
SomeRandomBloke 1:a50b6c866a3b 84 * @param callback Callback function to handle subscription to topics
SomeRandomBloke 1:a50b6c866a3b 85 */
SomeRandomBloke 0:260fb10c0755 86 void MQTTClient::init(IpAddr *server, int port, char *userName, char *password, void (*callback)(char*, char*)) {
SomeRandomBloke 0:260fb10c0755 87 this->port = port;
SomeRandomBloke 0:260fb10c0755 88 callback_server = callback;
SomeRandomBloke 0:260fb10c0755 89 serverIp = *server;
SomeRandomBloke 0:260fb10c0755 90 this->userName = userName;
SomeRandomBloke 0:260fb10c0755 91 this->password = password;
SomeRandomBloke 0:260fb10c0755 92 connected = false;
SomeRandomBloke 0:260fb10c0755 93 sessionOpened = false;
SomeRandomBloke 0:260fb10c0755 94 timer.start();
SomeRandomBloke 0:260fb10c0755 95 }
SomeRandomBloke 0:260fb10c0755 96
SomeRandomBloke 1:a50b6c866a3b 97 /** Send a message of specified size
SomeRandomBloke 1:a50b6c866a3b 98 *
SomeRandomBloke 1:a50b6c866a3b 99 * @param msg message string
SomeRandomBloke 1:a50b6c866a3b 100 * @param size Size of the message to send
SomeRandomBloke 1:a50b6c866a3b 101 * @returns value to indicate message sent successfully or not, -1 for error, 1 for success.
SomeRandomBloke 1:a50b6c866a3b 102 */
SomeRandomBloke 0:260fb10c0755 103 int MQTTClient::send_data(const char* msg, int size) {
SomeRandomBloke 0:260fb10c0755 104 int transLen = pTCPSocket->send(msg, size);
SomeRandomBloke 0:260fb10c0755 105
SomeRandomBloke 0:260fb10c0755 106 /*Check send length matches the message length*/
SomeRandomBloke 0:260fb10c0755 107 if (transLen != size) {
SomeRandomBloke 0:260fb10c0755 108 for (int i = 0; i < size; i++) {
SomeRandomBloke 0:260fb10c0755 109 printf("%x, ", msg[i]);
SomeRandomBloke 0:260fb10c0755 110 }
SomeRandomBloke 0:260fb10c0755 111 printf("Error on send.\r\n");
SomeRandomBloke 0:260fb10c0755 112 return -1;
SomeRandomBloke 0:260fb10c0755 113 }
SomeRandomBloke 0:260fb10c0755 114 return 1;
SomeRandomBloke 0:260fb10c0755 115 }
SomeRandomBloke 0:260fb10c0755 116
SomeRandomBloke 1:a50b6c866a3b 117 /** Start a MQTT session, build CONNECT packet
SomeRandomBloke 1:a50b6c866a3b 118 *
SomeRandomBloke 1:a50b6c866a3b 119 * @param id The client name shown on MQTT server.
SomeRandomBloke 1:a50b6c866a3b 120 * @returns -1 for error, 1 for success
SomeRandomBloke 1:a50b6c866a3b 121 */
SomeRandomBloke 0:260fb10c0755 122 int MQTTClient::open_session(char* id) {
SomeRandomBloke 0:260fb10c0755 123 /*variable header*/
SomeRandomBloke 0:260fb10c0755 124 char var_header[] = {0x00,0x06,0x4d,0x51,0x49,0x73,0x64,0x70,0x03,0x02,0x00,KEEPALIVE/500,0x00,strlen(id)};
SomeRandomBloke 0:260fb10c0755 125
SomeRandomBloke 0:260fb10c0755 126 /*fixed header: 2 bytes, big endian*/
SomeRandomBloke 0:260fb10c0755 127 char fixed_header[] = {MQTTCONNECT,12+strlen(id)+2};
SomeRandomBloke 0:260fb10c0755 128 short usernameLen = strlen( userName );
SomeRandomBloke 0:260fb10c0755 129 short passwordLen = strlen( password );
SomeRandomBloke 0:260fb10c0755 130 var_header[9] |= (usernameLen > 0 ? 0x80 : 0x00 );
SomeRandomBloke 0:260fb10c0755 131 var_header[9] |= (passwordLen > 0 ? 0x40 : 0x00 );
SomeRandomBloke 0:260fb10c0755 132
SomeRandomBloke 0:260fb10c0755 133 // printf("fixed %d, var %d id %d, username %d, password %d\n",sizeof(fixed_header), sizeof(var_header), sizeof(id), usernameLen, passwordLen );
SomeRandomBloke 0:260fb10c0755 134 char packet[sizeof(fixed_header) + sizeof(var_header) + sizeof(id) + usernameLen + (usernameLen > 0 ? 2 : 0) + passwordLen + (passwordLen > 0 ? 2 : 0) ];
SomeRandomBloke 0:260fb10c0755 135
SomeRandomBloke 0:260fb10c0755 136 memset(packet,0,sizeof(packet));
SomeRandomBloke 0:260fb10c0755 137 memcpy(packet,fixed_header,sizeof(fixed_header));
SomeRandomBloke 0:260fb10c0755 138 memcpy(packet+sizeof(fixed_header),var_header,sizeof(var_header));
SomeRandomBloke 0:260fb10c0755 139 memcpy(packet+sizeof(fixed_header)+sizeof(var_header), id, strlen(id));
SomeRandomBloke 0:260fb10c0755 140 if ( usernameLen > 0 ) {
SomeRandomBloke 0:260fb10c0755 141 packet[sizeof(fixed_header)+sizeof(var_header)+strlen(id)] = 0x00;
SomeRandomBloke 0:260fb10c0755 142 packet[sizeof(fixed_header)+sizeof(var_header)+strlen(id)+1] = usernameLen;
SomeRandomBloke 0:260fb10c0755 143 memcpy(packet+sizeof(fixed_header)+sizeof(var_header)+strlen(id)+2, userName, usernameLen);
SomeRandomBloke 0:260fb10c0755 144 packet[1] += (usernameLen + 2);
SomeRandomBloke 0:260fb10c0755 145 }
SomeRandomBloke 0:260fb10c0755 146 if ( passwordLen > 0 ) {
SomeRandomBloke 0:260fb10c0755 147 packet[sizeof(fixed_header)+sizeof(var_header)+strlen(id) + usernameLen + (usernameLen > 0 ? 2 : 0) ] = 0x00;
SomeRandomBloke 0:260fb10c0755 148 packet[sizeof(fixed_header)+sizeof(var_header)+strlen(id) + usernameLen + (usernameLen > 0 ? 2 : 0)+1] = passwordLen;
SomeRandomBloke 0:260fb10c0755 149 memcpy(packet+sizeof(fixed_header)+sizeof(var_header)+strlen(id)+ usernameLen + (usernameLen > 0 ? 2 : 0)+2, password, passwordLen);
SomeRandomBloke 0:260fb10c0755 150 packet[1] += (passwordLen + 2);
SomeRandomBloke 0:260fb10c0755 151 }
SomeRandomBloke 0:260fb10c0755 152
SomeRandomBloke 0:260fb10c0755 153 /* printf("Packet length %d\n", sizeof(packet));
SomeRandomBloke 0:260fb10c0755 154 for (int i = 0; i < sizeof(packet); i++) {
SomeRandomBloke 0:260fb10c0755 155 printf("%x, ", packet[i]);
SomeRandomBloke 0:260fb10c0755 156 }
SomeRandomBloke 0:260fb10c0755 157 printf("\r\n");
SomeRandomBloke 0:260fb10c0755 158 */
SomeRandomBloke 0:260fb10c0755 159 if (!send_data(packet, sizeof(packet))) {
SomeRandomBloke 0:260fb10c0755 160 return -1;
SomeRandomBloke 0:260fb10c0755 161 }
SomeRandomBloke 0:260fb10c0755 162 // printf("Sent\n");
SomeRandomBloke 0:260fb10c0755 163 return 1;
SomeRandomBloke 0:260fb10c0755 164 }
SomeRandomBloke 0:260fb10c0755 165
SomeRandomBloke 1:a50b6c866a3b 166 /** Open TCP port, connect to server on given IP address.
SomeRandomBloke 1:a50b6c866a3b 167 *
SomeRandomBloke 1:a50b6c866a3b 168 * @param id The client name shown on MQTT server.
SomeRandomBloke 1:a50b6c866a3b 169 * @returns -1: If connect to server failed. -2: Failed to open session on server. 1: Connection accessed.
SomeRandomBloke 1:a50b6c866a3b 170 */
SomeRandomBloke 0:260fb10c0755 171 int MQTTClient::connect(char* id) {
SomeRandomBloke 0:260fb10c0755 172 clientId = id;
SomeRandomBloke 0:260fb10c0755 173
SomeRandomBloke 0:260fb10c0755 174 /*Initial TCP socket*/
SomeRandomBloke 0:260fb10c0755 175 pTCPSocket = new TCPSocket;
SomeRandomBloke 0:260fb10c0755 176 pTCPSocket->setOnEvent(this, &MQTTClient::onTCPSocketEvent);
SomeRandomBloke 0:260fb10c0755 177
SomeRandomBloke 0:260fb10c0755 178 host.setPort(port);
SomeRandomBloke 0:260fb10c0755 179 host.setIp(serverIp);
SomeRandomBloke 0:260fb10c0755 180 host.setName("localhost");
SomeRandomBloke 0:260fb10c0755 181
SomeRandomBloke 0:260fb10c0755 182 /*Trying to connect to host*/
SomeRandomBloke 0:260fb10c0755 183 printf("Trying to connect to host..\r\n\r\n");
SomeRandomBloke 0:260fb10c0755 184 TCPSocketErr err = pTCPSocket->connect(host);
SomeRandomBloke 0:260fb10c0755 185
SomeRandomBloke 0:260fb10c0755 186 Net::poll();
SomeRandomBloke 0:260fb10c0755 187 if (err) {
SomeRandomBloke 0:260fb10c0755 188 printf("Error connecting to host [%d]\r\n", (int) err);
SomeRandomBloke 0:260fb10c0755 189 return -1;
SomeRandomBloke 0:260fb10c0755 190 }
SomeRandomBloke 0:260fb10c0755 191 printf("Connect to host sucessed..\r\n\r\n");
SomeRandomBloke 0:260fb10c0755 192
SomeRandomBloke 0:260fb10c0755 193 /*Wait TCP connection with server to be established*/
SomeRandomBloke 0:260fb10c0755 194 int i = 0;
SomeRandomBloke 0:260fb10c0755 195 while (!connected) {
SomeRandomBloke 0:260fb10c0755 196 Net::poll();
SomeRandomBloke 0:260fb10c0755 197 wait(1);
SomeRandomBloke 0:260fb10c0755 198 i++;
SomeRandomBloke 0:260fb10c0755 199 printf("Wait for connections %d..\r\n", i);
SomeRandomBloke 0:260fb10c0755 200 if (i == 35) {//If wait too long, give up.
SomeRandomBloke 0:260fb10c0755 201 return -1;
SomeRandomBloke 0:260fb10c0755 202 }
SomeRandomBloke 0:260fb10c0755 203 }
SomeRandomBloke 0:260fb10c0755 204
SomeRandomBloke 0:260fb10c0755 205 /*Send open session message to server*/
SomeRandomBloke 0:260fb10c0755 206 open_session(id);
SomeRandomBloke 0:260fb10c0755 207
SomeRandomBloke 0:260fb10c0755 208 /*Wait server notice of open sesion*/
SomeRandomBloke 0:260fb10c0755 209 while (!sessionOpened) {
SomeRandomBloke 0:260fb10c0755 210 Net::poll();
SomeRandomBloke 0:260fb10c0755 211 wait(1);
SomeRandomBloke 0:260fb10c0755 212 if (!connected) {
SomeRandomBloke 0:260fb10c0755 213 break;
SomeRandomBloke 0:260fb10c0755 214 }
SomeRandomBloke 0:260fb10c0755 215 printf("Wait for session..\r\n");
SomeRandomBloke 0:260fb10c0755 216 }
SomeRandomBloke 0:260fb10c0755 217 if (!connected) {
SomeRandomBloke 0:260fb10c0755 218 return -2;
SomeRandomBloke 0:260fb10c0755 219 }
SomeRandomBloke 0:260fb10c0755 220 lastActivity = timer.read_ms();
SomeRandomBloke 0:260fb10c0755 221 return 1;
SomeRandomBloke 0:260fb10c0755 222 }
SomeRandomBloke 0:260fb10c0755 223
SomeRandomBloke 1:a50b6c866a3b 224 /** Publish a message on a topic.
SomeRandomBloke 1:a50b6c866a3b 225 *
SomeRandomBloke 1:a50b6c866a3b 226 * @param pub_topic The topic name the massage will be publish on.
SomeRandomBloke 1:a50b6c866a3b 227 * @param msg The massage to be published.
SomeRandomBloke 1:a50b6c866a3b 228 * @returns -1: Failed to publish message. 1: Publish sucessed.
SomeRandomBloke 1:a50b6c866a3b 229 */
SomeRandomBloke 0:260fb10c0755 230 int MQTTClient::publish(char* pub_topic, char* msg) {
SomeRandomBloke 0:260fb10c0755 231 uint8_t var_header_pub[strlen(pub_topic)+3];
SomeRandomBloke 0:260fb10c0755 232 strcpy((char *)&var_header_pub[2], pub_topic);
SomeRandomBloke 0:260fb10c0755 233 var_header_pub[0] = 0;
SomeRandomBloke 0:260fb10c0755 234 var_header_pub[1] = strlen(pub_topic);
SomeRandomBloke 0:260fb10c0755 235 var_header_pub[sizeof(var_header_pub)-1] = 0;
SomeRandomBloke 0:260fb10c0755 236
SomeRandomBloke 0:260fb10c0755 237 uint8_t fixed_header_pub[] = {MQTTPUBLISH,sizeof(var_header_pub)+strlen(msg)};
SomeRandomBloke 0:260fb10c0755 238
SomeRandomBloke 0:260fb10c0755 239 uint8_t packet_pub[sizeof(fixed_header_pub)+sizeof(var_header_pub)+strlen(msg)];
SomeRandomBloke 0:260fb10c0755 240 memset(packet_pub,0,sizeof(packet_pub));
SomeRandomBloke 0:260fb10c0755 241 memcpy(packet_pub,fixed_header_pub,sizeof(fixed_header_pub));
SomeRandomBloke 0:260fb10c0755 242 memcpy(packet_pub+sizeof(fixed_header_pub),var_header_pub,sizeof(var_header_pub));
SomeRandomBloke 0:260fb10c0755 243 memcpy(packet_pub+sizeof(fixed_header_pub)+sizeof(var_header_pub),msg,strlen(msg));
SomeRandomBloke 0:260fb10c0755 244
SomeRandomBloke 0:260fb10c0755 245 if (!send_data((char*)packet_pub, sizeof(packet_pub))) {
SomeRandomBloke 0:260fb10c0755 246 return -1;
SomeRandomBloke 0:260fb10c0755 247 }
SomeRandomBloke 0:260fb10c0755 248 return 1;
SomeRandomBloke 0:260fb10c0755 249 }
SomeRandomBloke 0:260fb10c0755 250
SomeRandomBloke 1:a50b6c866a3b 251 /** Disconnect from server
SomeRandomBloke 1:a50b6c866a3b 252 */
SomeRandomBloke 0:260fb10c0755 253 void MQTTClient::disconnect() {
SomeRandomBloke 0:260fb10c0755 254 char packet_224[] = {0xe0, 0x00};
SomeRandomBloke 0:260fb10c0755 255 send_data((char*)packet_224, 2);
SomeRandomBloke 0:260fb10c0755 256
SomeRandomBloke 0:260fb10c0755 257 connected = false;
SomeRandomBloke 0:260fb10c0755 258 }
SomeRandomBloke 0:260fb10c0755 259
SomeRandomBloke 1:a50b6c866a3b 260 /** Read data from receive packet
SomeRandomBloke 1:a50b6c866a3b 261 * Determine what needs to be done with packet.
SomeRandomBloke 1:a50b6c866a3b 262 */
SomeRandomBloke 0:260fb10c0755 263 void MQTTClient::read_data() {
SomeRandomBloke 0:260fb10c0755 264 char buffer[1024];
SomeRandomBloke 0:260fb10c0755 265 int len = 0, readLen;
SomeRandomBloke 0:260fb10c0755 266
SomeRandomBloke 0:260fb10c0755 267 while ((readLen = pTCPSocket->recv(buffer, 1024)) != 0) {
SomeRandomBloke 0:260fb10c0755 268 len += readLen;
SomeRandomBloke 0:260fb10c0755 269 }
SomeRandomBloke 0:260fb10c0755 270
SomeRandomBloke 0:260fb10c0755 271 buffer[len] = '\0';
SomeRandomBloke 0:260fb10c0755 272
SomeRandomBloke 0:260fb10c0755 273
SomeRandomBloke 0:260fb10c0755 274 printf("Read length: %d %d\r\n", len, readLen);
SomeRandomBloke 0:260fb10c0755 275
SomeRandomBloke 0:260fb10c0755 276 for (int i = 0; i < len; i++) {
SomeRandomBloke 0:260fb10c0755 277 printf("%2X ", buffer[i]);
SomeRandomBloke 0:260fb10c0755 278 }
SomeRandomBloke 0:260fb10c0755 279 printf("\r\n");
SomeRandomBloke 0:260fb10c0755 280
SomeRandomBloke 0:260fb10c0755 281 char type = buffer[0]>>4;
SomeRandomBloke 0:260fb10c0755 282 if ( type == 2 ) { // CONNACK
SomeRandomBloke 0:260fb10c0755 283 printf("CONNACK\n");
SomeRandomBloke 0:260fb10c0755 284
SomeRandomBloke 0:260fb10c0755 285 } else if (type == 3) { // PUBLISH
SomeRandomBloke 0:260fb10c0755 286 if (callback_server) {
SomeRandomBloke 0:260fb10c0755 287 short index = 1;
SomeRandomBloke 0:260fb10c0755 288 short multiplier = 1;
SomeRandomBloke 0:260fb10c0755 289 short value = 0;
SomeRandomBloke 0:260fb10c0755 290 uint8_t digit;
SomeRandomBloke 0:260fb10c0755 291 do {
SomeRandomBloke 0:260fb10c0755 292 digit = buffer[index++];
SomeRandomBloke 0:260fb10c0755 293 value += (digit & 127) * multiplier;
SomeRandomBloke 0:260fb10c0755 294 multiplier *= 128;
SomeRandomBloke 0:260fb10c0755 295 } while ((digit & 128) != 0);
SomeRandomBloke 0:260fb10c0755 296 printf( "variable length %d, index %d\n", value, index );
SomeRandomBloke 0:260fb10c0755 297
SomeRandomBloke 0:260fb10c0755 298 // uint8_t tl = (buffer[2]<<3)+buffer[3];
SomeRandomBloke 0:260fb10c0755 299 uint8_t tl = (buffer[index]<<3)+buffer[index+1];
SomeRandomBloke 0:260fb10c0755 300 printf("Topic len %d\n",tl);
SomeRandomBloke 0:260fb10c0755 301 char topic[tl+1];
SomeRandomBloke 0:260fb10c0755 302 for (int i=0; i<tl; i++) {
SomeRandomBloke 0:260fb10c0755 303 topic[i] = buffer[index+2+i];
SomeRandomBloke 0:260fb10c0755 304 }
SomeRandomBloke 0:260fb10c0755 305 topic[tl] = 0;
SomeRandomBloke 0:260fb10c0755 306 // ignore msgID - only support QoS 0 subs
SomeRandomBloke 0:260fb10c0755 307 char *payload = buffer+index+2+tl;
SomeRandomBloke 0:260fb10c0755 308 callback_server(topic,(char*)payload);
SomeRandomBloke 0:260fb10c0755 309 }
SomeRandomBloke 0:260fb10c0755 310 } else if (type == 12) { // PINGREG -- Ask for alive
SomeRandomBloke 0:260fb10c0755 311 char packet_208[] = {0xd0, 0x00};
SomeRandomBloke 0:260fb10c0755 312 send_data((char*)packet_208, 2);
SomeRandomBloke 0:260fb10c0755 313 lastActivity = timer.read_ms();
SomeRandomBloke 0:260fb10c0755 314 }
SomeRandomBloke 0:260fb10c0755 315 }
SomeRandomBloke 0:260fb10c0755 316
SomeRandomBloke 1:a50b6c866a3b 317 /** Check for session opened
SomeRandomBloke 1:a50b6c866a3b 318 */
SomeRandomBloke 0:260fb10c0755 319 void MQTTClient::read_open_session() {
SomeRandomBloke 0:260fb10c0755 320 char buffer[32];
SomeRandomBloke 0:260fb10c0755 321 int len = 0, readLen;
SomeRandomBloke 0:260fb10c0755 322
SomeRandomBloke 0:260fb10c0755 323 while ((readLen = pTCPSocket->recv(buffer, 32)) != 0) {
SomeRandomBloke 0:260fb10c0755 324 len += readLen;
SomeRandomBloke 0:260fb10c0755 325 }
SomeRandomBloke 0:260fb10c0755 326
SomeRandomBloke 0:260fb10c0755 327 if (len == 4 && buffer[3] == 0) {
SomeRandomBloke 0:260fb10c0755 328 printf("Session opened\r\n");
SomeRandomBloke 0:260fb10c0755 329 sessionOpened = true;
SomeRandomBloke 0:260fb10c0755 330 }
SomeRandomBloke 0:260fb10c0755 331 }
SomeRandomBloke 0:260fb10c0755 332
SomeRandomBloke 1:a50b6c866a3b 333 /** Subscribe to a topic
SomeRandomBloke 1:a50b6c866a3b 334 *
SomeRandomBloke 1:a50b6c866a3b 335 * @param topic The topic name to be subscribed.
SomeRandomBloke 1:a50b6c866a3b 336 * @returns -1: Failed to subscribe to topic. 1: Subscribe sucessed.
SomeRandomBloke 1:a50b6c866a3b 337 */
SomeRandomBloke 0:260fb10c0755 338 int MQTTClient::subscribe(char* topic) {
SomeRandomBloke 0:260fb10c0755 339
SomeRandomBloke 0:260fb10c0755 340 if (connected) {
SomeRandomBloke 0:260fb10c0755 341 uint8_t var_header_topic[] = {0,10};
SomeRandomBloke 0:260fb10c0755 342 uint8_t fixed_header_topic[] = {MQTTSUBSCRIBE,sizeof(var_header_topic)+strlen(topic)+3};
SomeRandomBloke 0:260fb10c0755 343
SomeRandomBloke 0:260fb10c0755 344 //utf topic
SomeRandomBloke 0:260fb10c0755 345 uint8_t utf_topic[strlen(topic)+3];
SomeRandomBloke 0:260fb10c0755 346 strcpy((char *)&utf_topic[2], topic);
SomeRandomBloke 0:260fb10c0755 347
SomeRandomBloke 0:260fb10c0755 348 utf_topic[0] = 0;
SomeRandomBloke 0:260fb10c0755 349 utf_topic[1] = strlen(topic);
SomeRandomBloke 0:260fb10c0755 350 utf_topic[sizeof(utf_topic)-1] = 0;
SomeRandomBloke 0:260fb10c0755 351
SomeRandomBloke 0:260fb10c0755 352 char packet_topic[sizeof(var_header_topic)+sizeof(fixed_header_topic)+strlen(topic)+3];
SomeRandomBloke 0:260fb10c0755 353 memset(packet_topic,0,sizeof(packet_topic));
SomeRandomBloke 0:260fb10c0755 354 memcpy(packet_topic,fixed_header_topic,sizeof(fixed_header_topic));
SomeRandomBloke 0:260fb10c0755 355 memcpy(packet_topic+sizeof(fixed_header_topic),var_header_topic,sizeof(var_header_topic));
SomeRandomBloke 0:260fb10c0755 356 memcpy(packet_topic+sizeof(fixed_header_topic)+sizeof(var_header_topic),utf_topic,sizeof(utf_topic));
SomeRandomBloke 0:260fb10c0755 357
SomeRandomBloke 0:260fb10c0755 358 if (!send_data(packet_topic, sizeof(packet_topic))) {
SomeRandomBloke 0:260fb10c0755 359 return -1;
SomeRandomBloke 0:260fb10c0755 360 }
SomeRandomBloke 0:260fb10c0755 361 return 1;
SomeRandomBloke 0:260fb10c0755 362 }
SomeRandomBloke 0:260fb10c0755 363 return -1;
SomeRandomBloke 0:260fb10c0755 364 }
SomeRandomBloke 0:260fb10c0755 365
SomeRandomBloke 1:a50b6c866a3b 366 /** Send heartbeat/keep-alive message
SomeRandomBloke 1:a50b6c866a3b 367 *
SomeRandomBloke 1:a50b6c866a3b 368 */
SomeRandomBloke 0:260fb10c0755 369 void MQTTClient::live() {
SomeRandomBloke 0:260fb10c0755 370 if (connected) {
SomeRandomBloke 0:260fb10c0755 371 int t = timer.read_ms();
SomeRandomBloke 0:260fb10c0755 372 if (t - lastActivity > KEEPALIVE) {
SomeRandomBloke 0:260fb10c0755 373 //Send 192 0 to broker
SomeRandomBloke 0:260fb10c0755 374 printf("Send 192\r\n");
SomeRandomBloke 0:260fb10c0755 375 char packet_192[] = {0xc0, 0x00};
SomeRandomBloke 0:260fb10c0755 376 send_data((char*)packet_192, 2);
SomeRandomBloke 0:260fb10c0755 377 lastActivity = t;
SomeRandomBloke 0:260fb10c0755 378 }
SomeRandomBloke 0:260fb10c0755 379 }
SomeRandomBloke 0:260fb10c0755 380 }
SomeRandomBloke 0:260fb10c0755 381
SomeRandomBloke 1:a50b6c866a3b 382 /** TCP Socket event handling
SomeRandomBloke 1:a50b6c866a3b 383 *
SomeRandomBloke 1:a50b6c866a3b 384 * @param e Event object
SomeRandomBloke 1:a50b6c866a3b 385 */
SomeRandomBloke 0:260fb10c0755 386 void MQTTClient::onTCPSocketEvent(TCPSocketEvent e) {
SomeRandomBloke 0:260fb10c0755 387 switch (e) {
SomeRandomBloke 0:260fb10c0755 388 case TCPSOCKET_ACCEPT:
SomeRandomBloke 0:260fb10c0755 389 printf("New TCPSocketEvent: TCPSOCKET_ACCEPT\r\n");
SomeRandomBloke 0:260fb10c0755 390 break;
SomeRandomBloke 0:260fb10c0755 391 case TCPSOCKET_CONNECTED:
SomeRandomBloke 0:260fb10c0755 392 printf("New TCPSocketEvent: TCPSOCKET_CONNECTED\r\n");
SomeRandomBloke 0:260fb10c0755 393 connected = true;
SomeRandomBloke 0:260fb10c0755 394 break;
SomeRandomBloke 0:260fb10c0755 395 case TCPSOCKET_WRITEABLE:
SomeRandomBloke 0:260fb10c0755 396 printf("New TCPSocketEvent: TCPSOCKET_WRITEABLE\r\n");
SomeRandomBloke 0:260fb10c0755 397 break;
SomeRandomBloke 0:260fb10c0755 398 case TCPSOCKET_READABLE:
SomeRandomBloke 0:260fb10c0755 399 printf("New TCPSocketEvent: TCPSOCKET_READABLE\r\n");
SomeRandomBloke 0:260fb10c0755 400 if (!sessionOpened) {
SomeRandomBloke 0:260fb10c0755 401 read_open_session();
SomeRandomBloke 0:260fb10c0755 402 }
SomeRandomBloke 0:260fb10c0755 403 read_data();
SomeRandomBloke 0:260fb10c0755 404 break;
SomeRandomBloke 0:260fb10c0755 405 case TCPSOCKET_CONTIMEOUT:
SomeRandomBloke 0:260fb10c0755 406 printf("New TCPSocketEvent: TCPSOCKET_CONTIMEOUT\r\n");
SomeRandomBloke 0:260fb10c0755 407 break;
SomeRandomBloke 0:260fb10c0755 408 case TCPSOCKET_CONRST:
SomeRandomBloke 0:260fb10c0755 409 printf("New TCPSocketEvent: TCPSOCKET_CONRST\r\n");
SomeRandomBloke 0:260fb10c0755 410 break;
SomeRandomBloke 0:260fb10c0755 411 case TCPSOCKET_CONABRT:
SomeRandomBloke 0:260fb10c0755 412 printf("New TCPSocketEvent: TCPSOCKET_CONABRT\r\n");
SomeRandomBloke 0:260fb10c0755 413 break;
SomeRandomBloke 0:260fb10c0755 414 case TCPSOCKET_ERROR:
SomeRandomBloke 0:260fb10c0755 415 printf("New TCPSocketEvent: TCPSOCKET_ERROR\r\n");
SomeRandomBloke 0:260fb10c0755 416 break;
SomeRandomBloke 0:260fb10c0755 417 case TCPSOCKET_DISCONNECTED:
SomeRandomBloke 0:260fb10c0755 418 printf("New TCPSocketEvent: TCPSOCKET_DISCONNECTED\r\n");
SomeRandomBloke 0:260fb10c0755 419 pTCPSocket->close();
SomeRandomBloke 0:260fb10c0755 420 connected = false;
SomeRandomBloke 0:260fb10c0755 421 break;
SomeRandomBloke 0:260fb10c0755 422 }
SomeRandomBloke 0:260fb10c0755 423 }