Program to send NTP data to MQTT broker
Fork of MQTT by
MQTTClient.h@11:db15da110a37, 2014-04-10 (annotated)
- Committer:
- icraggs
- Date:
- Thu Apr 10 22:47:17 2014 +0000
- Revision:
- 11:db15da110a37
- Parent:
- 9:01b8cc7d94cc
- Child:
- 13:fd82db992024
Change thread function definitions to allow it to work
Who changed what in which revision?
User | Revision | Line number | New 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 | *******************************************************************************/ |
sam_grove | 0:fe461e4d7afe | 16 | |
icraggs | 2:dcfdd2abfe71 | 17 | #if !defined(MQTTCLIENT_H) |
icraggs | 2:dcfdd2abfe71 | 18 | #define MQTTCLIENT_H |
icraggs | 2:dcfdd2abfe71 | 19 | |
icraggs | 2:dcfdd2abfe71 | 20 | #include "FP.h" |
icraggs | 3:dbff6b768d28 | 21 | #include "MQTTPacket.h" |
icraggs | 6:4d312a49200b | 22 | #include "stdio.h" |
icraggs | 2:dcfdd2abfe71 | 23 | |
icraggs | 3:dbff6b768d28 | 24 | namespace MQTT |
icraggs | 3:dbff6b768d28 | 25 | { |
icraggs | 3:dbff6b768d28 | 26 | |
icraggs | 2:dcfdd2abfe71 | 27 | |
icraggs | 2:dcfdd2abfe71 | 28 | enum QoS { QOS0, QOS1, QOS2 }; |
sam_grove | 0:fe461e4d7afe | 29 | |
icraggs | 2:dcfdd2abfe71 | 30 | |
icraggs | 3:dbff6b768d28 | 31 | struct Message |
icraggs | 2:dcfdd2abfe71 | 32 | { |
icraggs | 2:dcfdd2abfe71 | 33 | enum QoS qos; |
icraggs | 2:dcfdd2abfe71 | 34 | bool retained; |
icraggs | 2:dcfdd2abfe71 | 35 | bool dup; |
icraggs | 2:dcfdd2abfe71 | 36 | unsigned short msgid; |
icraggs | 2:dcfdd2abfe71 | 37 | void *payload; |
icraggs | 2:dcfdd2abfe71 | 38 | size_t payloadlen; |
sam_grove | 0:fe461e4d7afe | 39 | }; |
sam_grove | 0:fe461e4d7afe | 40 | |
icraggs | 6:4d312a49200b | 41 | template<class Network, class Timer, class Thread> class Client; |
icraggs | 4:4ef00243708e | 42 | |
icraggs | 4:4ef00243708e | 43 | class Result |
icraggs | 4:4ef00243708e | 44 | { |
icraggs | 4:4ef00243708e | 45 | /* success or failure result data */ |
icraggs | 6:4d312a49200b | 46 | Client<class Network, class Timer, class Thread>* client; |
icraggs | 4:4ef00243708e | 47 | }; |
icraggs | 4:4ef00243708e | 48 | |
icraggs | 9:01b8cc7d94cc | 49 | |
icraggs | 9:01b8cc7d94cc | 50 | class PacketId |
icraggs | 9:01b8cc7d94cc | 51 | { |
icraggs | 9:01b8cc7d94cc | 52 | public: |
icraggs | 9:01b8cc7d94cc | 53 | PacketId(); |
icraggs | 9:01b8cc7d94cc | 54 | |
icraggs | 9:01b8cc7d94cc | 55 | int getNext(); |
icraggs | 9:01b8cc7d94cc | 56 | |
icraggs | 9:01b8cc7d94cc | 57 | private: |
icraggs | 9:01b8cc7d94cc | 58 | static const int MAX_PACKET_ID = 65535; |
icraggs | 9:01b8cc7d94cc | 59 | int next; |
icraggs | 9:01b8cc7d94cc | 60 | }; |
icraggs | 9:01b8cc7d94cc | 61 | |
icraggs | 9:01b8cc7d94cc | 62 | typedef void (*resultHandler)(Result*); |
icraggs | 9:01b8cc7d94cc | 63 | typedef void (*messageHandler)(Message*); |
icraggs | 2:dcfdd2abfe71 | 64 | |
icraggs | 6:4d312a49200b | 65 | template<class Network, class Timer, class Thread> class Client |
icraggs | 2:dcfdd2abfe71 | 66 | { |
icraggs | 2:dcfdd2abfe71 | 67 | |
sam_grove | 0:fe461e4d7afe | 68 | public: |
icraggs | 4:4ef00243708e | 69 | |
icraggs | 9:01b8cc7d94cc | 70 | Client(Network* network, Timer* timer, const int buffer_size = 100, const int command_timeout = 30); |
icraggs | 2:dcfdd2abfe71 | 71 | |
icraggs | 9:01b8cc7d94cc | 72 | int connect(MQTTPacket_connectData* options = 0, resultHandler fn = 0); |
icraggs | 2:dcfdd2abfe71 | 73 | |
icraggs | 9:01b8cc7d94cc | 74 | template<class T> |
icraggs | 9:01b8cc7d94cc | 75 | int connect(MQTTPacket_connectData* options = 0, T *item = 0, void(T::*method)(Result *) = 0); // alternative to pass in pointer to member function |
icraggs | 9:01b8cc7d94cc | 76 | |
icraggs | 9:01b8cc7d94cc | 77 | int publish(const char* topic, Message* message, resultHandler rh = 0); |
sam_grove | 0:fe461e4d7afe | 78 | |
icraggs | 9:01b8cc7d94cc | 79 | int subscribe(const char* topicFilter, enum QoS qos, messageHandler mh, resultHandler rh = 0); |
icraggs | 2:dcfdd2abfe71 | 80 | |
icraggs | 9:01b8cc7d94cc | 81 | int unsubscribe(char* topicFilter, resultHandler rh = 0); |
icraggs | 9:01b8cc7d94cc | 82 | |
icraggs | 9:01b8cc7d94cc | 83 | int disconnect(int timeout, resultHandler rh = 0); |
sam_grove | 0:fe461e4d7afe | 84 | |
icraggs | 8:c46930bd6c82 | 85 | void run(void const *argument); |
icraggs | 8:c46930bd6c82 | 86 | |
icraggs | 2:dcfdd2abfe71 | 87 | private: |
icraggs | 2:dcfdd2abfe71 | 88 | |
icraggs | 4:4ef00243708e | 89 | int cycle(); |
icraggs | 2:dcfdd2abfe71 | 90 | |
icraggs | 3:dbff6b768d28 | 91 | int decodePacket(int* value, int timeout); |
icraggs | 4:4ef00243708e | 92 | int readPacket(int timeout = -1); |
icraggs | 6:4d312a49200b | 93 | int sendPacket(int length, int timeout = -1); |
icraggs | 3:dbff6b768d28 | 94 | |
icraggs | 4:4ef00243708e | 95 | Thread* thread; |
icraggs | 4:4ef00243708e | 96 | Network* ipstack; |
icraggs | 6:4d312a49200b | 97 | Timer* timer; |
icraggs | 4:4ef00243708e | 98 | |
icraggs | 9:01b8cc7d94cc | 99 | char* buf; |
icraggs | 2:dcfdd2abfe71 | 100 | int buflen; |
icraggs | 2:dcfdd2abfe71 | 101 | |
icraggs | 4:4ef00243708e | 102 | char* readbuf; |
icraggs | 4:4ef00243708e | 103 | int readbuflen; |
icraggs | 4:4ef00243708e | 104 | |
icraggs | 6:4d312a49200b | 105 | int command_timeout; // max time to wait for any MQTT command to complete, in seconds |
icraggs | 6:4d312a49200b | 106 | int keepalive; |
icraggs | 9:01b8cc7d94cc | 107 | PacketId packetid; |
icraggs | 9:01b8cc7d94cc | 108 | |
icraggs | 9:01b8cc7d94cc | 109 | typedef FP<void, Result*> resultHandlerFP; |
icraggs | 9:01b8cc7d94cc | 110 | // how many concurrent operations should we allow? Each one will require a function pointer |
icraggs | 9:01b8cc7d94cc | 111 | resultHandlerFP connectHandler; |
icraggs | 9:01b8cc7d94cc | 112 | |
icraggs | 9:01b8cc7d94cc | 113 | #define MAX_MESSAGE_HANDLERS 5 |
icraggs | 9:01b8cc7d94cc | 114 | typedef FP<void, Message*> messageHandlerFP; |
icraggs | 9:01b8cc7d94cc | 115 | messageHandlerFP messageHandlers[MAX_MESSAGE_HANDLERS]; // Linked list, or constructor parameter to limit array size? |
icraggs | 4:4ef00243708e | 116 | |
icraggs | 11:db15da110a37 | 117 | static void threadfn(void* arg); |
icraggs | 11:db15da110a37 | 118 | |
sam_grove | 0:fe461e4d7afe | 119 | }; |
sam_grove | 0:fe461e4d7afe | 120 | |
icraggs | 8:c46930bd6c82 | 121 | |
icraggs | 8:c46930bd6c82 | 122 | } |
icraggs | 8:c46930bd6c82 | 123 | |
icraggs | 11:db15da110a37 | 124 | template<class Network, class Timer, class Thread> void MQTT::Client<Network, Timer, Thread>::threadfn(void* arg) |
icraggs | 11:db15da110a37 | 125 | { |
icraggs | 11:db15da110a37 | 126 | ((Client<Network, Timer, Thread>*) arg)->run(NULL); |
icraggs | 11:db15da110a37 | 127 | } |
icraggs | 11:db15da110a37 | 128 | |
icraggs | 11:db15da110a37 | 129 | |
icraggs | 9:01b8cc7d94cc | 130 | template<class Network, class Timer, class Thread> MQTT::Client<Network, Timer, Thread>::Client(Network* network, Timer* timer, const int buffer_size, const int command_timeout) : packetid() |
icraggs | 8:c46930bd6c82 | 131 | { |
icraggs | 8:c46930bd6c82 | 132 | |
icraggs | 8:c46930bd6c82 | 133 | buf = new char[buffer_size]; |
icraggs | 8:c46930bd6c82 | 134 | readbuf = new char[buffer_size]; |
icraggs | 8:c46930bd6c82 | 135 | buflen = readbuflen = buffer_size; |
icraggs | 8:c46930bd6c82 | 136 | this->command_timeout = command_timeout; |
icraggs | 8:c46930bd6c82 | 137 | this->thread = 0; |
icraggs | 8:c46930bd6c82 | 138 | this->ipstack = network; |
icraggs | 8:c46930bd6c82 | 139 | this->timer = timer; |
icraggs | 8:c46930bd6c82 | 140 | } |
icraggs | 8:c46930bd6c82 | 141 | |
icraggs | 8:c46930bd6c82 | 142 | |
icraggs | 8:c46930bd6c82 | 143 | template<class Network, class Timer, class Thread> int MQTT::Client<Network, Timer, Thread>::sendPacket(int length, int timeout) |
icraggs | 8:c46930bd6c82 | 144 | { |
icraggs | 8:c46930bd6c82 | 145 | int sent = 0; |
icraggs | 8:c46930bd6c82 | 146 | |
icraggs | 8:c46930bd6c82 | 147 | while (sent < length) |
icraggs | 8:c46930bd6c82 | 148 | sent += ipstack->write(&buf[sent], length, -1); |
icraggs | 8:c46930bd6c82 | 149 | |
icraggs | 8:c46930bd6c82 | 150 | return sent; |
icraggs | 8:c46930bd6c82 | 151 | } |
icraggs | 8:c46930bd6c82 | 152 | |
icraggs | 8:c46930bd6c82 | 153 | |
icraggs | 8:c46930bd6c82 | 154 | template<class Network, class Timer, class Thread> int MQTT::Client<Network, Timer, Thread>::decodePacket(int* value, int timeout) |
icraggs | 8:c46930bd6c82 | 155 | { |
icraggs | 8:c46930bd6c82 | 156 | char c; |
icraggs | 8:c46930bd6c82 | 157 | int multiplier = 1; |
icraggs | 8:c46930bd6c82 | 158 | int len = 0; |
icraggs | 8:c46930bd6c82 | 159 | #define MAX_NO_OF_REMAINING_LENGTH_BYTES 4 |
icraggs | 8:c46930bd6c82 | 160 | |
icraggs | 8:c46930bd6c82 | 161 | *value = 0; |
icraggs | 8:c46930bd6c82 | 162 | do |
icraggs | 8:c46930bd6c82 | 163 | { |
icraggs | 8:c46930bd6c82 | 164 | int rc = MQTTPACKET_READ_ERROR; |
icraggs | 8:c46930bd6c82 | 165 | |
icraggs | 8:c46930bd6c82 | 166 | if (++len > MAX_NO_OF_REMAINING_LENGTH_BYTES) |
icraggs | 8:c46930bd6c82 | 167 | { |
icraggs | 8:c46930bd6c82 | 168 | rc = MQTTPACKET_READ_ERROR; /* bad data */ |
icraggs | 8:c46930bd6c82 | 169 | goto exit; |
icraggs | 8:c46930bd6c82 | 170 | } |
icraggs | 8:c46930bd6c82 | 171 | rc = ipstack->read(&c, 1, timeout); |
icraggs | 8:c46930bd6c82 | 172 | if (rc != 1) |
icraggs | 8:c46930bd6c82 | 173 | goto exit; |
icraggs | 8:c46930bd6c82 | 174 | *value += (c & 127) * multiplier; |
icraggs | 8:c46930bd6c82 | 175 | multiplier *= 128; |
icraggs | 8:c46930bd6c82 | 176 | } while ((c & 128) != 0); |
icraggs | 8:c46930bd6c82 | 177 | exit: |
icraggs | 8:c46930bd6c82 | 178 | return len; |
icraggs | 8:c46930bd6c82 | 179 | } |
icraggs | 8:c46930bd6c82 | 180 | |
icraggs | 8:c46930bd6c82 | 181 | |
icraggs | 8:c46930bd6c82 | 182 | /** |
icraggs | 8:c46930bd6c82 | 183 | * If any read fails in this method, then we should disconnect from the network, as on reconnect |
icraggs | 8:c46930bd6c82 | 184 | * the packets can be retried. |
icraggs | 8:c46930bd6c82 | 185 | * @param timeout the max time to wait for the packet read to complete, in milliseconds |
icraggs | 8:c46930bd6c82 | 186 | * @return the MQTT packet type, or -1 if none |
icraggs | 8:c46930bd6c82 | 187 | */ |
icraggs | 8:c46930bd6c82 | 188 | template<class Network, class Timer, class Thread> int MQTT::Client<Network, Timer, Thread>::readPacket(int timeout) |
icraggs | 8:c46930bd6c82 | 189 | { |
icraggs | 8:c46930bd6c82 | 190 | int rc = -1; |
icraggs | 8:c46930bd6c82 | 191 | MQTTHeader header = {0}; |
icraggs | 8:c46930bd6c82 | 192 | int len = 0; |
icraggs | 8:c46930bd6c82 | 193 | int rem_len = 0; |
icraggs | 8:c46930bd6c82 | 194 | |
icraggs | 8:c46930bd6c82 | 195 | /* 1. read the header byte. This has the packet type in it */ |
icraggs | 8:c46930bd6c82 | 196 | if (ipstack->read(readbuf, 1, timeout) != 1) |
icraggs | 8:c46930bd6c82 | 197 | goto exit; |
icraggs | 8:c46930bd6c82 | 198 | |
icraggs | 8:c46930bd6c82 | 199 | len = 1; |
icraggs | 8:c46930bd6c82 | 200 | /* 2. read the remaining length. This is variable in itself */ |
icraggs | 8:c46930bd6c82 | 201 | decodePacket(&rem_len, timeout); |
icraggs | 8:c46930bd6c82 | 202 | len += MQTTPacket_encode(readbuf + 1, rem_len); /* put the original remaining length back into the buffer */ |
icraggs | 8:c46930bd6c82 | 203 | |
icraggs | 8:c46930bd6c82 | 204 | /* 3. read the rest of the buffer using a callback to supply the rest of the data */ |
icraggs | 8:c46930bd6c82 | 205 | if (ipstack->read(readbuf + len, rem_len, timeout) != rem_len) |
icraggs | 8:c46930bd6c82 | 206 | goto exit; |
icraggs | 8:c46930bd6c82 | 207 | |
icraggs | 8:c46930bd6c82 | 208 | header.byte = readbuf[0]; |
icraggs | 8:c46930bd6c82 | 209 | rc = header.bits.type; |
icraggs | 8:c46930bd6c82 | 210 | exit: |
icraggs | 8:c46930bd6c82 | 211 | return rc; |
icraggs | 3:dbff6b768d28 | 212 | } |
icraggs | 3:dbff6b768d28 | 213 | |
icraggs | 8:c46930bd6c82 | 214 | |
icraggs | 8:c46930bd6c82 | 215 | template<class Network, class Timer, class Thread> int MQTT::Client<Network, Timer, Thread>::cycle() |
icraggs | 8:c46930bd6c82 | 216 | { |
icraggs | 9:01b8cc7d94cc | 217 | int timeout = -1; |
icraggs | 8:c46930bd6c82 | 218 | /* get one piece of work off the wire and one pass through */ |
icraggs | 8:c46930bd6c82 | 219 | |
icraggs | 8:c46930bd6c82 | 220 | // 1. read the socket, see what work is due. |
icraggs | 9:01b8cc7d94cc | 221 | int packet_type = readPacket(timeout); |
icraggs | 8:c46930bd6c82 | 222 | |
icraggs | 8:c46930bd6c82 | 223 | printf("packet type %d\n", packet_type); |
icraggs | 8:c46930bd6c82 | 224 | |
icraggs | 8:c46930bd6c82 | 225 | switch (packet_type) |
icraggs | 8:c46930bd6c82 | 226 | { |
icraggs | 8:c46930bd6c82 | 227 | case CONNACK: |
icraggs | 8:c46930bd6c82 | 228 | printf("connack received\n"); |
icraggs | 8:c46930bd6c82 | 229 | break; |
icraggs | 8:c46930bd6c82 | 230 | case PUBLISH: |
icraggs | 8:c46930bd6c82 | 231 | break; |
icraggs | 8:c46930bd6c82 | 232 | case PUBACK: |
icraggs | 8:c46930bd6c82 | 233 | break; |
icraggs | 8:c46930bd6c82 | 234 | case SUBACK: |
icraggs | 8:c46930bd6c82 | 235 | break; |
icraggs | 8:c46930bd6c82 | 236 | case PUBREC: |
icraggs | 8:c46930bd6c82 | 237 | break; |
icraggs | 8:c46930bd6c82 | 238 | case PUBCOMP: |
icraggs | 8:c46930bd6c82 | 239 | break; |
icraggs | 8:c46930bd6c82 | 240 | case PINGRESP: |
icraggs | 8:c46930bd6c82 | 241 | break; |
icraggs | 8:c46930bd6c82 | 242 | case -1: |
icraggs | 8:c46930bd6c82 | 243 | break; |
icraggs | 8:c46930bd6c82 | 244 | } |
icraggs | 8:c46930bd6c82 | 245 | return packet_type; |
icraggs | 8:c46930bd6c82 | 246 | } |
icraggs | 8:c46930bd6c82 | 247 | |
icraggs | 8:c46930bd6c82 | 248 | |
icraggs | 8:c46930bd6c82 | 249 | template<class Network, class Timer, class Thread> void MQTT::Client<Network, Timer, Thread>::run(void const *argument) |
icraggs | 8:c46930bd6c82 | 250 | { |
icraggs | 11:db15da110a37 | 251 | while (true) |
icraggs | 11:db15da110a37 | 252 | { |
icraggs | 11:db15da110a37 | 253 | cycle(); |
icraggs | 11:db15da110a37 | 254 | } |
icraggs | 8:c46930bd6c82 | 255 | } |
icraggs | 8:c46930bd6c82 | 256 | |
icraggs | 8:c46930bd6c82 | 257 | |
icraggs | 9:01b8cc7d94cc | 258 | template<class Network, class Timer, class Thread> int MQTT::Client<Network, Timer, Thread>::connect(MQTTPacket_connectData* options, resultHandler resultHandler) |
icraggs | 8:c46930bd6c82 | 259 | { |
icraggs | 8:c46930bd6c82 | 260 | int len = 0; |
icraggs | 8:c46930bd6c82 | 261 | int rc = -99; |
icraggs | 8:c46930bd6c82 | 262 | MQTTPacket_connectData default_options = MQTTPacket_connectData_initializer; |
icraggs | 8:c46930bd6c82 | 263 | |
icraggs | 8:c46930bd6c82 | 264 | /* 2. if the connect was successful, send the MQTT connect packet */ |
icraggs | 8:c46930bd6c82 | 265 | if (options == 0) |
icraggs | 8:c46930bd6c82 | 266 | { |
icraggs | 8:c46930bd6c82 | 267 | default_options.clientID.cstring = "me"; |
icraggs | 8:c46930bd6c82 | 268 | options = &default_options; |
icraggs | 8:c46930bd6c82 | 269 | } |
icraggs | 8:c46930bd6c82 | 270 | |
icraggs | 8:c46930bd6c82 | 271 | this->keepalive = options->keepAliveInterval; |
icraggs | 8:c46930bd6c82 | 272 | len = MQTTSerialize_connect(buf, buflen, options); |
icraggs | 8:c46930bd6c82 | 273 | printf("len from send is %d %d\n", len, buflen); |
icraggs | 8:c46930bd6c82 | 274 | rc = sendPacket(len); // send the connect packet |
icraggs | 8:c46930bd6c82 | 275 | printf("rc from send is %d\n", rc); |
icraggs | 8:c46930bd6c82 | 276 | |
icraggs | 8:c46930bd6c82 | 277 | /* 3. wait until the connack is received */ |
icraggs | 8:c46930bd6c82 | 278 | if (resultHandler == 0) |
icraggs | 8:c46930bd6c82 | 279 | { |
icraggs | 8:c46930bd6c82 | 280 | // this will be a blocking call, wait for the connack |
icraggs | 8:c46930bd6c82 | 281 | if (cycle() == CONNACK) |
icraggs | 8:c46930bd6c82 | 282 | { |
icraggs | 8:c46930bd6c82 | 283 | int connack_rc = -1; |
icraggs | 8:c46930bd6c82 | 284 | if (MQTTDeserialize_connack(&connack_rc, readbuf, readbuflen) == 1) |
icraggs | 8:c46930bd6c82 | 285 | rc = connack_rc; |
icraggs | 8:c46930bd6c82 | 286 | } |
icraggs | 8:c46930bd6c82 | 287 | } |
icraggs | 8:c46930bd6c82 | 288 | else |
icraggs | 8:c46930bd6c82 | 289 | { |
icraggs | 8:c46930bd6c82 | 290 | // set connect response callback function |
icraggs | 9:01b8cc7d94cc | 291 | connectHandler.attach(resultHandler); |
icraggs | 8:c46930bd6c82 | 292 | |
icraggs | 8:c46930bd6c82 | 293 | // start background thread |
icraggs | 11:db15da110a37 | 294 | this->thread = new Thread((void (*)(void const *argument))&MQTT::Client<Network, Timer, Thread>::threadfn, (void*)this); |
icraggs | 8:c46930bd6c82 | 295 | } |
icraggs | 8:c46930bd6c82 | 296 | |
icraggs | 8:c46930bd6c82 | 297 | return rc; |
icraggs | 8:c46930bd6c82 | 298 | } |
icraggs | 8:c46930bd6c82 | 299 | |
icraggs | 8:c46930bd6c82 | 300 | |
icraggs | 9:01b8cc7d94cc | 301 | template<class Network, class Timer, class Thread> int MQTT::Client<Network, Timer, Thread>::subscribe(const char* topicFilter, enum QoS qos, |
icraggs | 9:01b8cc7d94cc | 302 | messageHandler messageHandler, resultHandler resultHandler) |
icraggs | 8:c46930bd6c82 | 303 | { |
icraggs | 8:c46930bd6c82 | 304 | int rc = -1, |
icraggs | 8:c46930bd6c82 | 305 | len = 0; |
icraggs | 8:c46930bd6c82 | 306 | MQTTString topic = {(char*)topicFilter, 0, 0}; |
icraggs | 8:c46930bd6c82 | 307 | |
icraggs | 9:01b8cc7d94cc | 308 | len = MQTTSerialize_subscribe(buf, buflen, 0, packetid.getNext(), 1, &topic, (int*)&qos); |
icraggs | 8:c46930bd6c82 | 309 | rc = sendPacket(len); // send the subscribe packet |
icraggs | 8:c46930bd6c82 | 310 | |
icraggs | 8:c46930bd6c82 | 311 | /* wait for suback */ |
icraggs | 8:c46930bd6c82 | 312 | if (resultHandler == 0) |
icraggs | 8:c46930bd6c82 | 313 | { |
icraggs | 8:c46930bd6c82 | 314 | // this will block |
icraggs | 8:c46930bd6c82 | 315 | if (cycle() == SUBACK) |
icraggs | 8:c46930bd6c82 | 316 | { |
icraggs | 9:01b8cc7d94cc | 317 | int count = 0, grantedQoS = -1, mypacketid; |
icraggs | 9:01b8cc7d94cc | 318 | if (MQTTDeserialize_suback(&mypacketid, 1, &count, &grantedQoS, readbuf, readbuflen) == 1) |
icraggs | 8:c46930bd6c82 | 319 | rc = grantedQoS; // 0, 1, 2 or 0x80 |
icraggs | 8:c46930bd6c82 | 320 | } |
icraggs | 8:c46930bd6c82 | 321 | } |
icraggs | 8:c46930bd6c82 | 322 | else |
icraggs | 8:c46930bd6c82 | 323 | { |
icraggs | 8:c46930bd6c82 | 324 | // set subscribe response callback function |
icraggs | 8:c46930bd6c82 | 325 | |
icraggs | 8:c46930bd6c82 | 326 | } |
icraggs | 8:c46930bd6c82 | 327 | |
icraggs | 8:c46930bd6c82 | 328 | return rc; |
icraggs | 8:c46930bd6c82 | 329 | } |
icraggs | 8:c46930bd6c82 | 330 | |
icraggs | 8:c46930bd6c82 | 331 | |
sam_grove | 0:fe461e4d7afe | 332 | #endif |