MQTT cellular example
Dependencies: C027_Support C12832 MQTT mbed
Fork of Cellular_HelloMQTT by
Revision 14:d495a85ed55b, committed 2014-05-27
- Comitter:
- mazgch
- Date:
- Tue May 27 09:23:07 2014 +0000
- Parent:
- 13:500c2e7a57d6
- Child:
- 15:710f99b36ff2
- Commit message:
- pull latest libs (use new API)
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/C027_Support.lib Tue May 27 09:23:07 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/teams/ublox/code/C027_Support/#34985b4d821e
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MQTT.lib Tue May 27 09:23:07 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/teams/mqtt/code/MQTT/#a51dd239b78e
--- a/MQTT/FP.lib Tue May 20 14:33:32 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -http://mbed.org/users/sam_grove/code/FP/#e0f19cdaa46e
--- a/MQTT/IPStack/MbedIPStack.h Tue May 20 14:33:32 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,86 +0,0 @@ -#include "TCPSocketConnection.h" - -#ifndef MBEDIPSTACK_H -#define MBEDIPSTACK_H - -class IPStack -{ -public: - IPStack() - { - mysock.set_blocking(false, 1000); // 1 second Timeout - } - - int connect(char* hostname, int port) - { - return mysock.connect(hostname, port); - } - - int read(char* buffer, int len, int timeout) - { - mysock.set_blocking(false, timeout); - return mysock.receive(buffer, len); - } - - int write(char* buffer, int len, int timeout) - { - mysock.set_blocking(false, timeout); - return mysock.send(buffer, len); - } - - int disconnect() - { - return mysock.close(); - } - -private: - - TCPSocketConnection mysock; - -}; - - -class Countdown -{ -public: - Countdown() - { - t = Timer(); - } - - Countdown(int ms) - { - t = Timer(); - countdown_ms(ms); - } - - - bool expired() - { - return t.read_ms() >= interval_end_ms; - } - - void countdown_ms(int ms) - { - t.stop(); - interval_end_ms = ms; - t.reset(); - t.start(); - } - - void countdown(int seconds) - { - countdown_ms(seconds * 1000); - } - - int left_ms() - { - return interval_end_ms - t.read_ms(); - } - -private: - Timer t; - int interval_end_ms; -}; - -#endif
--- a/MQTT/MQTTAsync.h Tue May 20 14:33:32 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,607 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2014 IBM Corp. - * - * All rights reserved. This program and the accompanying materials - * are made available under the terms of the Eclipse Public License v1.0 - * and Eclipse Distribution License v1.0 which accompany this distribution. - * - * The Eclipse Public License is available at - * http://www.eclipse.org/legal/epl-v10.html - * and the Eclipse Distribution License is available at - * http://www.eclipse.org/org/documents/edl-v10.php. - * - * Contributors: - * Ian Craggs - initial API and implementation and/or initial documentation - *******************************************************************************/ - -#if !defined(MQTTASYNC_H) -#define MQTTASYNC_H - -#include "FP.h" -#include "MQTTPacket.h" -#include "stdio.h" - -namespace MQTT -{ - - -enum QoS { QOS0, QOS1, QOS2 }; - - -struct Message -{ - enum QoS qos; - bool retained; - bool dup; - unsigned short id; - void *payload; - size_t payloadlen; -}; - - -class PacketId -{ -public: - PacketId(); - - int getNext(); - -private: - static const int MAX_PACKET_ID = 65535; - int next; -}; - -typedef void (*messageHandler)(Message*); - -typedef struct limits -{ - int MAX_MQTT_PACKET_SIZE; // - int MAX_MESSAGE_HANDLERS; // each subscription requires a message handler - int MAX_CONCURRENT_OPERATIONS; // each command which runs concurrently can have a result handler, when we are in multi-threaded mode - int command_timeout_ms; - - limits() - { - MAX_MQTT_PACKET_SIZE = 100; - MAX_MESSAGE_HANDLERS = 5; - MAX_CONCURRENT_OPERATIONS = 1; // 1 indicates single-threaded mode - set to >1 for multithreaded mode - command_timeout_ms = 30000; - } -} Limits; - - -/** - * @class Async - * @brief non-blocking, threaded MQTT client API - * @param Network a network class which supports send, receive - * @param Timer a timer class with the methods: - */ -template<class Network, class Timer, class Thread, class Mutex> class Async -{ - -public: - - struct Result - { - /* success or failure result data */ - Async<Network, Timer, Thread, Mutex>* client; - int rc; - }; - - typedef void (*resultHandler)(Result*); - - Async(Network* network, const Limits limits = Limits()); - - typedef struct - { - Async* client; - Network* network; - } connectionLostInfo; - - typedef int (*connectionLostHandlers)(connectionLostInfo*); - - /** Set the connection lost callback - called whenever the connection is lost and we should be connected - * @param clh - pointer to the callback function - */ - void setConnectionLostHandler(connectionLostHandlers clh) - { - connectionLostHandler.attach(clh); - } - - /** Set the default message handling callback - used for any message which does not match a subscription message handler - * @param mh - pointer to the callback function - */ - void setDefaultMessageHandler(messageHandler mh) - { - defaultMessageHandler.attach(mh); - } - - int connect(resultHandler fn, MQTTPacket_connectData* options = 0); - - template<class T> - int connect(void(T::*method)(Result *), MQTTPacket_connectData* options = 0, T *item = 0); // alternative to pass in pointer to member function - - int publish(resultHandler rh, const char* topic, Message* message); - - int subscribe(resultHandler rh, const char* topicFilter, enum QoS qos, messageHandler mh); - - int unsubscribe(resultHandler rh, const char* topicFilter); - - int disconnect(resultHandler rh); - -private: - - void run(void const *argument); - int cycle(int timeout); - int waitfor(int packet_type, Timer& atimer); - int keepalive(); - int findFreeOperation(); - - int decodePacket(int* value, int timeout); - int readPacket(int timeout); - int sendPacket(int length, int timeout); - int deliverMessage(MQTTString* topic, Message* message); - - Thread* thread; - Network* ipstack; - - Limits limits; - - char* buf; - char* readbuf; - - Timer ping_timer, connect_timer; - unsigned int keepAliveInterval; - bool ping_outstanding; - - PacketId packetid; - - typedef FP<void, Result*> resultHandlerFP; - resultHandlerFP connectHandler; - - typedef FP<void, Message*> messageHandlerFP; - struct MessageHandlers - { - const char* topic; - messageHandlerFP fp; - } *messageHandlers; // Message handlers are indexed by subscription topic - - // how many concurrent operations should we allow? Each one will require a function pointer - struct Operations - { - unsigned short id; - resultHandlerFP fp; - const char* topic; // if this is a publish, store topic name in case republishing is required - Message* message; // for publish, - Timer timer; // to check if the command has timed out - } *operations; // result handlers are indexed by packet ids - - static void threadfn(void* arg); - - messageHandlerFP defaultMessageHandler; - - typedef FP<int, connectionLostInfo*> connectionLostFP; - - connectionLostFP connectionLostHandler; - -}; - -} - - -template<class Network, class Timer, class Thread, class Mutex> void MQTT::Async<Network, Timer, Thread, Mutex>::threadfn(void* arg) -{ - ((Async<Network, Timer, Thread, Mutex>*) arg)->run(NULL); -} - - -template<class Network, class Timer, class Thread, class Mutex> MQTT::Async<Network, Timer, Thread, Mutex>::Async(Network* network, Limits limits) : limits(limits), packetid() -{ - this->thread = 0; - this->ipstack = network; - this->ping_timer = Timer(); - this->ping_outstanding = 0; - - // How to make these memory allocations portable? I was hoping to avoid the heap - buf = new char[limits.MAX_MQTT_PACKET_SIZE]; - readbuf = new char[limits.MAX_MQTT_PACKET_SIZE]; - this->operations = new struct Operations[limits.MAX_CONCURRENT_OPERATIONS]; - for (int i = 0; i < limits.MAX_CONCURRENT_OPERATIONS; ++i) - operations[i].id = 0; - this->messageHandlers = new struct MessageHandlers[limits.MAX_MESSAGE_HANDLERS]; - for (int i = 0; i < limits.MAX_MESSAGE_HANDLERS; ++i) - messageHandlers[i].topic = 0; -} - - -template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::sendPacket(int length, int timeout) -{ - int sent = 0; - - while (sent < length) - sent += ipstack->write(&buf[sent], length, timeout); - if (sent == length) - ping_timer.countdown(this->keepAliveInterval); // record the fact that we have successfully sent the packet - return sent; -} - - -template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::decodePacket(int* value, int timeout) -{ - char c; - int multiplier = 1; - int len = 0; - const int MAX_NO_OF_REMAINING_LENGTH_BYTES = 4; - - *value = 0; - do - { - int rc = MQTTPACKET_READ_ERROR; - - if (++len > MAX_NO_OF_REMAINING_LENGTH_BYTES) - { - rc = MQTTPACKET_READ_ERROR; /* bad data */ - goto exit; - } - rc = ipstack->read(&c, 1, timeout); - if (rc != 1) - goto exit; - *value += (c & 127) * multiplier; - multiplier *= 128; - } while ((c & 128) != 0); -exit: - return len; -} - - -/** - * If any read fails in this method, then we should disconnect from the network, as on reconnect - * the packets can be retried. - * @param timeout the max time to wait for the packet read to complete, in milliseconds - * @return the MQTT packet type, or -1 if none - */ -template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::readPacket(int timeout) -{ - int rc = -1; - MQTTHeader header = {0}; - int len = 0; - int rem_len = 0; - - /* 1. read the header byte. This has the packet type in it */ - if (ipstack->read(readbuf, 1, timeout) != 1) - goto exit; - - len = 1; - /* 2. read the remaining length. This is variable in itself */ - decodePacket(&rem_len, timeout); - len += MQTTPacket_encode(readbuf + 1, rem_len); /* put the original remaining length back into the buffer */ - - /* 3. read the rest of the buffer using a callback to supply the rest of the data */ - if (ipstack->read(readbuf + len, rem_len, timeout) != rem_len) - goto exit; - - header.byte = readbuf[0]; - rc = header.bits.type; -exit: - return rc; -} - - -template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::deliverMessage(MQTTString* topic, Message* message) -{ - int rc = -1; - - // we have to find the right message handler - indexed by topic - for (int i = 0; i < limits.MAX_MESSAGE_HANDLERS; ++i) - { - if (messageHandlers[i].topic != 0 && MQTTPacket_equals(topic, (char*)messageHandlers[i].topic)) - { - messageHandlers[i].fp(message); - rc = 0; - break; - } - } - - return rc; -} - - - -template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::cycle(int timeout) -{ - /* get one piece of work off the wire and one pass through */ - - // read the socket, see what work is due - int packet_type = readPacket(timeout); - - int len, rc; - switch (packet_type) - { - case CONNACK: - if (this->thread) - { - Result res = {this, 0}; - if (MQTTDeserialize_connack(&res.rc, readbuf, limits.MAX_MQTT_PACKET_SIZE) == 1) - ; - connectHandler(&res); - connectHandler.detach(); // only invoke the callback once - } - break; - case PUBACK: - if (this->thread) - ; //call resultHandler - case SUBACK: - break; - case PUBLISH: - MQTTString topicName; - Message msg; - rc = MQTTDeserialize_publish((int*)&msg.dup, (int*)&msg.qos, (int*)&msg.retained, (int*)&msg.id, &topicName, - (char**)&msg.payload, (int*)&msg.payloadlen, readbuf, limits.MAX_MQTT_PACKET_SIZE);; - if (msg.qos == QOS0) - deliverMessage(&topicName, &msg); - break; - case PUBREC: - int type, dup, mypacketid; - if (MQTTDeserialize_ack(&type, &dup, &mypacketid, readbuf, limits.MAX_MQTT_PACKET_SIZE) == 1) - ; - // must lock this access against the application thread, if we are multi-threaded - len = MQTTSerialize_ack(buf, limits.MAX_MQTT_PACKET_SIZE, PUBREL, 0, mypacketid); - rc = sendPacket(len, timeout); // send the PUBREL packet - if (rc != len) - goto exit; // there was a problem - - break; - case PUBCOMP: - break; - case PINGRESP: - ping_outstanding = false; - break; - } - keepalive(); -exit: - return packet_type; -} - - -template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::keepalive() -{ - int rc = 0; - - if (keepAliveInterval == 0) - goto exit; - - if (ping_timer.expired()) - { - if (ping_outstanding) - rc = -1; - else - { - int len = MQTTSerialize_pingreq(buf, limits.MAX_MQTT_PACKET_SIZE); - rc = sendPacket(len, 1000); // send the ping packet - if (rc != len) - rc = -1; // indicate there's a problem - else - ping_outstanding = true; - } - } - -exit: - return rc; -} - - -template<class Network, class Timer, class Thread, class Mutex> void MQTT::Async<Network, Timer, Thread, Mutex>::run(void const *argument) -{ - while (true) - cycle(ping_timer.left_ms()); -} - - -// only used in single-threaded mode where one command at a time is in process -template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::waitfor(int packet_type, Timer& atimer) -{ - int rc = -1; - - do - { - if (atimer.expired()) - break; // we timed out - } - while ((rc = cycle(atimer.left_ms())) != packet_type); - - return rc; -} - - -template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::connect(resultHandler resultHandler, MQTTPacket_connectData* options) -{ - connect_timer.countdown(limits.command_timeout_ms); - - MQTTPacket_connectData default_options = MQTTPacket_connectData_initializer; - if (options == 0) - options = &default_options; // set default options if none were supplied - - this->keepAliveInterval = options->keepAliveInterval; - ping_timer.countdown(this->keepAliveInterval); - int len = MQTTSerialize_connect(buf, limits.MAX_MQTT_PACKET_SIZE, options); - int rc = sendPacket(len, connect_timer.left_ms()); // send the connect packet - if (rc != len) - goto exit; // there was a problem - - if (resultHandler == 0) // wait until the connack is received - { - // this will be a blocking call, wait for the connack - if (waitfor(CONNACK, connect_timer) == CONNACK) - { - int connack_rc = -1; - if (MQTTDeserialize_connack(&connack_rc, readbuf, limits.MAX_MQTT_PACKET_SIZE) == 1) - rc = connack_rc; - } - } - else - { - // set connect response callback function - connectHandler.attach(resultHandler); - - // start background thread - this->thread = new Thread((void (*)(void const *argument))&MQTT::Async<Network, Timer, Thread, Mutex>::threadfn, (void*)this); - } - -exit: - return rc; -} - - -template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::findFreeOperation() -{ - int found = -1; - for (int i = 0; i < limits.MAX_CONCURRENT_OPERATIONS; ++i) - { - if (operations[i].id == 0) - { - found = i; - break; - } - } - return found; -} - - -template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::subscribe(resultHandler resultHandler, const char* topicFilter, enum QoS qos, messageHandler messageHandler) -{ - int index = 0; - if (this->thread) - index = findFreeOperation(); - Timer& atimer = operations[index].timer; - - atimer.countdown(limits.command_timeout_ms); - MQTTString topic = {(char*)topicFilter, 0, 0}; - - int len = MQTTSerialize_subscribe(buf, limits.MAX_MQTT_PACKET_SIZE, 0, packetid.getNext(), 1, &topic, (int*)&qos); - int rc = sendPacket(len, atimer.left_ms()); // send the subscribe packet - if (rc != len) - goto exit; // there was a problem - - /* wait for suback */ - if (resultHandler == 0) - { - // this will block - if (waitfor(SUBACK, atimer) == SUBACK) - { - int count = 0, grantedQoS = -1, mypacketid; - if (MQTTDeserialize_suback(&mypacketid, 1, &count, &grantedQoS, readbuf, limits.MAX_MQTT_PACKET_SIZE) == 1) - rc = grantedQoS; // 0, 1, 2 or 0x80 - if (rc != 0x80) - { - for (int i = 0; i < limits.MAX_MESSAGE_HANDLERS; ++i) - { - if (messageHandlers[i].topic == 0) - { - messageHandlers[i].topic = topicFilter; - messageHandlers[i].fp.attach(messageHandler); - rc = 0; - break; - } - } - } - } - } - else - { - // set subscribe response callback function - - } - -exit: - return rc; -} - - -template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::unsubscribe(resultHandler resultHandler, const char* topicFilter) -{ - int index = 0; - if (this->thread) - index = findFreeOperation(); - Timer& atimer = operations[index].timer; - - atimer.countdown(limits.command_timeout_ms); - MQTTString topic = {(char*)topicFilter, 0, 0}; - - int len = MQTTSerialize_unsubscribe(buf, limits.MAX_MQTT_PACKET_SIZE, 0, packetid.getNext(), 1, &topic); - int rc = sendPacket(len, atimer.left_ms()); // send the subscribe packet - if (rc != len) - goto exit; // there was a problem - - // set unsubscribe response callback function - - -exit: - return rc; -} - - - -template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::publish(resultHandler resultHandler, const char* topicName, Message* message) -{ - int index = 0; - if (this->thread) - index = findFreeOperation(); - Timer& atimer = operations[index].timer; - - atimer.countdown(limits.command_timeout_ms); - MQTTString topic = {(char*)topicName, 0, 0}; - - if (message->qos == QOS1 || message->qos == QOS2) - message->id = packetid.getNext(); - - int len = MQTTSerialize_publish(buf, limits.MAX_MQTT_PACKET_SIZE, 0, message->qos, message->retained, message->id, topic, (char*)message->payload, message->payloadlen); - int rc = sendPacket(len, atimer.left_ms()); // send the subscribe packet - if (rc != len) - goto exit; // there was a problem - - /* wait for acks */ - if (resultHandler == 0) - { - if (message->qos == QOS1) - { - if (waitfor(PUBACK, atimer) == PUBACK) - { - int type, dup, mypacketid; - if (MQTTDeserialize_ack(&type, &dup, &mypacketid, readbuf, limits.MAX_MQTT_PACKET_SIZE) == 1) - rc = 0; - } - } - else if (message->qos == QOS2) - { - if (waitfor(PUBCOMP, atimer) == PUBCOMP) - { - int type, dup, mypacketid; - if (MQTTDeserialize_ack(&type, &dup, &mypacketid, readbuf, limits.MAX_MQTT_PACKET_SIZE) == 1) - rc = 0; - } - - } - } - else - { - // set publish response callback function - - } - -exit: - return rc; -} - - -template<class Network, class Timer, class Thread, class Mutex> int MQTT::Async<Network, Timer, Thread, Mutex>::disconnect(resultHandler resultHandler) -{ - Timer timer = Timer(limits.command_timeout_ms); // we might wait for incomplete incoming publishes to complete - int len = MQTTSerialize_disconnect(buf, limits.MAX_MQTT_PACKET_SIZE); - int rc = sendPacket(len, timer.left_ms()); // send the disconnect packet - - return (rc == len) ? 0 : -1; -} - - - -#endif \ No newline at end of file
--- a/MQTT/MQTTClient.h Tue May 20 14:33:32 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,653 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2014 IBM Corp. - * - * All rights reserved. This program and the accompanying materials - * are made available under the terms of the Eclipse Public License v1.0 - * and Eclipse Distribution License v1.0 which accompany this distribution. - * - * The Eclipse Public License is available at - * http://www.eclipse.org/legal/epl-v10.html - * and the Eclipse Distribution License is available at - * http://www.eclipse.org/org/documents/edl-v10.php. - * - * Contributors: - * Ian Craggs - initial API and implementation and/or initial documentation - *******************************************************************************/ - - /* - - TODO: - - ensure publish packets are retried on reconnect - - updating usage of FP. Try to remove inclusion of FP.cpp in main. sg- - - */ - -#if !defined(MQTTCLIENT_H) -#define MQTTCLIENT_H - -#include "FP.h" -#include "MQTTPacket.h" -#include "stdio.h" - -namespace MQTT -{ - - -enum QoS { QOS0, QOS1, QOS2 }; - -enum returnCode { BUFFER_OVERFLOW = -2, FAILURE = -1, SUCCESS = 0 }; - - -struct Message -{ - enum QoS qos; - bool retained; - bool dup; - unsigned short id; - void *payload; - size_t payloadlen; -}; - - -struct MessageData -{ - struct Message message; - char* topicName; -}; - - -class PacketId -{ -public: - PacketId() - { - next = 0; - } - - int getNext() - { - return next = (next == MAX_PACKET_ID) ? 1 : ++next; - } - -private: - static const int MAX_PACKET_ID = 65535; - int next; -}; - - -/** - * @class Client - * @brief blocking, non-threaded MQTT client API - * - * This version of the API blocks on all method calls, until they are complete. This means that only one - * MQTT request can be in process at any one time. - * @param Network a network class which supports send, receive - * @param Timer a timer class with the methods: - */ -template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE = 100, int MAX_MESSAGE_HANDLERS = 5> class Client -{ - -public: - - typedef void (*messageHandler)(Message*); - - /** Construct the client - * @param network - pointer to an instance of the Network class - must be connected to the endpoint - * before calling MQTT connect - * @param limits an instance of the Limit class - to alter limits as required - */ - Client(Network& network, unsigned int command_timeout_ms = 30000); - - /** Set the default message handling callback - used for any message which does not match a subscription message handler - * @param mh - pointer to the callback function - */ - void setDefaultMessageHandler(messageHandler mh) - { - defaultMessageHandler.attach(mh); - } - - /** MQTT Connect - send an MQTT connect packet down the network and wait for a Connack - * The nework object must be connected to the network endpoint before calling this - * @param options - connect options - * @return success code - - */ - int connect(MQTTPacket_connectData* options = 0); - - /** MQTT Publish - send an MQTT publish packet and wait for all acks to complete for all QoSs - * @param topic - the topic to publish to - * @param message - the message to send - * @return success code - - */ - int publish(const char* topicName, Message* message); - - /** MQTT Subscribe - send an MQTT subscribe packet and wait for the suback - * @param topicFilter - a topic pattern which can include wildcards - * @param qos - the MQTT QoS to subscribe at - * @param mh - the callback function to be invoked when a message is received for this subscription - * @return success code - - */ - int subscribe(const char* topicFilter, enum QoS qos, messageHandler mh); - - /** MQTT Unsubscribe - send an MQTT unsubscribe packet and wait for the unsuback - * @param topicFilter - a topic pattern which can include wildcards - * @return success code - - */ - int unsubscribe(const char* topicFilter); - - /** MQTT Disconnect - send an MQTT disconnect packet - * @return success code - - */ - int disconnect(); - - /** A call to this API must be made within the keepAlive interval to keep the MQTT connection alive - * yield can be called if no other MQTT operation is needed. This will also allow messages to be - * received. - * @param timeout_ms the time to wait, in milliseconds - * @return success code - on failure, this means the client has disconnected - */ - int yield(int timeout_ms = 1000); - -private: - - int cycle(Timer& timer); - int waitfor(int packet_type, Timer& timer); - int keepalive(); - - int decodePacket(int* value, int timeout); - int readPacket(Timer& timer); - int sendPacket(int length, Timer& timer); - int deliverMessage(MQTTString& topicName, Message& message); - bool isTopicMatched(char* topicFilter, MQTTString& topicName); - - Network& ipstack; - unsigned int command_timeout_ms; - - char buf[MAX_MQTT_PACKET_SIZE]; - char readbuf[MAX_MQTT_PACKET_SIZE]; - - Timer ping_timer; - unsigned int keepAliveInterval; - bool ping_outstanding; - - PacketId packetid; - - // typedef FP<void, Message*> messageHandlerFP; - struct MessageHandlers - { - const char* topicFilter; - //messageHandlerFP fp; typedefs not liked? - FP<void, Message*> fp; - } messageHandlers[MAX_MESSAGE_HANDLERS]; // Message handlers are indexed by subscription topic - - FP<void, Message*> defaultMessageHandler; - - bool isconnected; - -}; - -} - - -template<class Network, class Timer, int a, int MAX_MESSAGE_HANDLERS> -MQTT::Client<Network, Timer, a, MAX_MESSAGE_HANDLERS>::Client(Network& network, unsigned int command_timeout_ms) : ipstack(network), packetid() -{ - ping_timer = Timer(); - ping_outstanding = 0; - for (int i = 0; i < MAX_MESSAGE_HANDLERS; ++i) - messageHandlers[i].topicFilter = 0; - this->command_timeout_ms = command_timeout_ms; - isconnected = false; -} - - -template<class Network, class Timer, int a, int b> -int MQTT::Client<Network, Timer, a, b>::sendPacket(int length, Timer& timer) -{ - int rc = FAILURE, - sent = 0; - - while (sent < length && !timer.expired()) - { - rc = ipstack.write(&buf[sent], length, timer.left_ms()); - if (rc < 0) // there was an error writing the data - break; - sent += rc; - } - if (sent == length) - { - ping_timer.countdown(this->keepAliveInterval); // record the fact that we have successfully sent the packet - rc = SUCCESS; - } - else - rc = FAILURE; - return rc; -} - - -template<class Network, class Timer, int a, int b> -int MQTT::Client<Network, Timer, a, b>::decodePacket(int* value, int timeout) -{ - char c; - int multiplier = 1; - int len = 0; - const int MAX_NO_OF_REMAINING_LENGTH_BYTES = 4; - - *value = 0; - do - { - int rc = MQTTPACKET_READ_ERROR; - - if (++len > MAX_NO_OF_REMAINING_LENGTH_BYTES) - { - rc = MQTTPACKET_READ_ERROR; /* bad data */ - goto exit; - } - rc = ipstack.read(&c, 1, timeout); - if (rc != 1) - goto exit; - *value += (c & 127) * multiplier; - multiplier *= 128; - } while ((c & 128) != 0); -exit: - return len; -} - - -/** - * If any read fails in this method, then we should disconnect from the network, as on reconnect - * the packets can be retried. - * @param timeout the max time to wait for the packet read to complete, in milliseconds - * @return the MQTT packet type, or -1 if none - */ -template<class Network, class Timer, int a, int b> -int MQTT::Client<Network, Timer, a, b>::readPacket(Timer& timer) -{ - int rc = FAILURE; - MQTTHeader header = {0}; - int len = 0; - int rem_len = 0; - - /* 1. read the header byte. This has the packet type in it */ - if (ipstack.read(readbuf, 1, timer.left_ms()) != 1) - goto exit; - - len = 1; - /* 2. read the remaining length. This is variable in itself */ - decodePacket(&rem_len, timer.left_ms()); - len += MQTTPacket_encode(readbuf + 1, rem_len); /* put the original remaining length back into the buffer */ - - /* 3. read the rest of the buffer using a callback to supply the rest of the data */ - if (ipstack.read(readbuf + len, rem_len, timer.left_ms()) != rem_len) - goto exit; - - header.byte = readbuf[0]; - rc = header.bits.type; -exit: - return rc; -} - - -// assume topic filter and name is in correct format -// # can only be at end -// + and # can only be next to separator -template<class Network, class Timer, int a, int b> -bool MQTT::Client<Network, Timer, a, b>::isTopicMatched(char* topicFilter, MQTTString& topicName) -{ - char* curf = topicFilter; - char* curn = topicName.lenstring.data; - char* curn_end = curn + topicName.lenstring.len; - - while (*curf && curn < curn_end) - { - if (*curn == '/' && *curf != '/') - break; - if (*curf != '+' && *curf != '#' && *curf != *curn) - break; - if (*curf == '+') - { // skip until we meet the next separator, or end of string - char* nextpos = curn + 1; - while (nextpos < curn_end && *nextpos != '/') - nextpos = ++curn + 1; - } - else if (*curf == '#') - curn = curn_end - 1; // skip until end of string - curf++; - curn++; - }; - - return (curn == curn_end) && (*curf == '\0'); -} - - - -template<class Network, class Timer, int a, int MAX_MESSAGE_HANDLERS> -int MQTT::Client<Network, Timer, a, MAX_MESSAGE_HANDLERS>::deliverMessage(MQTTString& topicName, Message& message) -{ - int rc = FAILURE; - - // we have to find the right message handler - indexed by topic - for (int i = 0; i < MAX_MESSAGE_HANDLERS; ++i) - { - if (messageHandlers[i].topicFilter != 0 && (MQTTPacket_equals(&topicName, (char*)messageHandlers[i].topicFilter) || - isTopicMatched((char*)messageHandlers[i].topicFilter, topicName))) - { - if (messageHandlers[i].fp.attached()) - { - messageHandlers[i].fp(&message); - rc = SUCCESS; - } - } - } - - if (rc == FAILURE && defaultMessageHandler.attached()) - { - defaultMessageHandler(&message); - rc = SUCCESS; - } - - return rc; -} - - - -template<class Network, class Timer, int a, int b> -int MQTT::Client<Network, Timer, a, b>::yield(int timeout_ms) -{ - int rc = SUCCESS; - Timer timer = Timer(); - - timer.countdown_ms(timeout_ms); - while (!timer.expired()) - { - if (cycle(timer) == FAILURE) - { - rc = FAILURE; - break; - } - } - - return rc; -} - - -template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int b> -int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::cycle(Timer& timer) -{ - /* get one piece of work off the wire and one pass through */ - - // read the socket, see what work is due - int packet_type = readPacket(timer); - - int len = 0, - rc = SUCCESS; - - switch (packet_type) - { - case CONNACK: - case PUBACK: - case SUBACK: - break; - case PUBLISH: - MQTTString topicName; - Message msg; - if (MQTTDeserialize_publish((int*)&msg.dup, (int*)&msg.qos, (int*)&msg.retained, (int*)&msg.id, &topicName, - (char**)&msg.payload, (int*)&msg.payloadlen, readbuf, MAX_MQTT_PACKET_SIZE) != 1) - goto exit; - deliverMessage(topicName, msg); - if (msg.qos != QOS0) - { - if (msg.qos == QOS1) - len = MQTTSerialize_ack(buf, MAX_MQTT_PACKET_SIZE, PUBACK, 0, msg.id); - else if (msg.qos == QOS2) - len = MQTTSerialize_ack(buf, MAX_MQTT_PACKET_SIZE, PUBREC, 0, msg.id); - if (len <= 0) - rc = FAILURE; - else - rc = sendPacket(len, timer); - if (rc == FAILURE) - goto exit; // there was a problem - } - break; - case PUBREC: - int type, dup, mypacketid; - if (MQTTDeserialize_ack(&type, &dup, &mypacketid, readbuf, MAX_MQTT_PACKET_SIZE) != 1) - rc = FAILURE; - else if ((len = MQTTSerialize_ack(buf, MAX_MQTT_PACKET_SIZE, PUBREL, 0, mypacketid)) <= 0) - rc = FAILURE; - else if ((rc = sendPacket(len, timer)) != SUCCESS) // send the PUBREL packet - rc = FAILURE; // there was a problem - if (rc == FAILURE) - goto exit; // there was a problem - break; - case PUBCOMP: - break; - case PINGRESP: - ping_outstanding = false; - break; - } - keepalive(); -exit: - if (rc == SUCCESS) - rc = packet_type; - return rc; -} - - -template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int b> -int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::keepalive() -{ - int rc = FAILURE; - - if (keepAliveInterval == 0) - { - rc = SUCCESS; - goto exit; - } - - if (ping_timer.expired()) - { - if (!ping_outstanding) - { - Timer timer = Timer(1000); - int len = MQTTSerialize_pingreq(buf, MAX_MQTT_PACKET_SIZE); - if (len > 0 && (rc = sendPacket(len, timer)) == SUCCESS) // send the ping packet - ping_outstanding = true; - } - } - -exit: - return rc; -} - - -// only used in single-threaded mode where one command at a time is in process -template<class Network, class Timer, int a, int b> -int MQTT::Client<Network, Timer, a, b>::waitfor(int packet_type, Timer& timer) -{ - int rc = FAILURE; - - do - { - if (timer.expired()) - break; // we timed out - } - while ((rc = cycle(timer)) != packet_type); - - return rc; -} - - -template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int b> -int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::connect(MQTTPacket_connectData* options) -{ - Timer connect_timer = Timer(command_timeout_ms); - int rc = FAILURE; - - MQTTPacket_connectData default_options = MQTTPacket_connectData_initializer; - if (options == 0) - options = &default_options; // set default options if none were supplied - - this->keepAliveInterval = options->keepAliveInterval; - ping_timer.countdown(this->keepAliveInterval); - int len = MQTTSerialize_connect(buf, MAX_MQTT_PACKET_SIZE, options); - if (len <= 0) - goto exit; - if ((rc = sendPacket(len, connect_timer)) != SUCCESS) // send the connect packet - goto exit; // there was a problem - - // this will be a blocking call, wait for the connack - if (waitfor(CONNACK, connect_timer) == CONNACK) - { - int connack_rc = -1; - if (MQTTDeserialize_connack(&connack_rc, readbuf, MAX_MQTT_PACKET_SIZE) == 1) - rc = connack_rc; - else - rc = FAILURE; - } - else - rc = FAILURE; - -exit: - if (rc == SUCCESS) - isconnected = true; - return rc; -} - - -template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int MAX_MESSAGE_HANDLERS> -int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, MAX_MESSAGE_HANDLERS>::subscribe(const char* topicFilter, enum QoS qos, messageHandler messageHandler) -{ - int rc = FAILURE; - Timer timer = Timer(command_timeout_ms); - int len = 0; - - MQTTString topic = {(char*)topicFilter, 0, 0}; - if (!isconnected) - goto exit; - - len = MQTTSerialize_subscribe(buf, MAX_MQTT_PACKET_SIZE, 0, packetid.getNext(), 1, &topic, (int*)&qos); - if (len <= 0) - goto exit; - if ((rc = sendPacket(len, timer)) != SUCCESS) // send the subscribe packet - goto exit; // there was a problem - - if (waitfor(SUBACK, timer) == SUBACK) // wait for suback - { - int count = 0, grantedQoS = -1, mypacketid; - if (MQTTDeserialize_suback(&mypacketid, 1, &count, &grantedQoS, readbuf, MAX_MQTT_PACKET_SIZE) == 1) - rc = grantedQoS; // 0, 1, 2 or 0x80 - if (rc != 0x80) - { - for (int i = 0; i < MAX_MESSAGE_HANDLERS; ++i) - { - if (messageHandlers[i].topicFilter == 0) - { - messageHandlers[i].topicFilter = topicFilter; - messageHandlers[i].fp.attach(messageHandler); - rc = 0; - break; - } - } - } - } - else - rc = FAILURE; - -exit: - //if (rc == FAILURE) - // closesession(); - return rc; -} - - -template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int MAX_MESSAGE_HANDLERS> -int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, MAX_MESSAGE_HANDLERS>::unsubscribe(const char* topicFilter) -{ - int rc = FAILURE; - Timer timer = Timer(command_timeout_ms); - - MQTTString topic = {(char*)topicFilter, 0, 0}; - - int len = MQTTSerialize_unsubscribe(buf, MAX_MQTT_PACKET_SIZE, 0, packetid.getNext(), 1, &topic); - if (len <= 0) - goto exit; - if ((rc = sendPacket(len, timer)) != SUCCESS) // send the subscribe packet - goto exit; // there was a problem - - if (waitfor(UNSUBACK, timer) == UNSUBACK) - { - int mypacketid; // should be the same as the packetid above - if (MQTTDeserialize_unsuback(&mypacketid, readbuf, MAX_MQTT_PACKET_SIZE) == 1) - rc = 0; - } - else - rc = FAILURE; - -exit: - return rc; -} - - - -template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int b> -int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::publish(const char* topicName, Message* message) -{ - int rc = FAILURE; - Timer timer = Timer(command_timeout_ms); - - MQTTString topicString = {(char*)topicName, 0, 0}; - - if (message->qos == QOS1 || message->qos == QOS2) - message->id = packetid.getNext(); - - int len = MQTTSerialize_publish(buf, MAX_MQTT_PACKET_SIZE, 0, message->qos, message->retained, message->id, - topicString, (char*)message->payload, message->payloadlen); - if (len <= 0) - goto exit; - if ((rc = sendPacket(len, timer)) != SUCCESS) // send the subscribe packet - goto exit; // there was a problem - - if (message->qos == QOS1) - { - if (waitfor(PUBACK, timer) == PUBACK) - { - int type, dup, mypacketid; - if (MQTTDeserialize_ack(&type, &dup, &mypacketid, readbuf, MAX_MQTT_PACKET_SIZE) != 1) - rc = FAILURE; - } - else - rc = FAILURE; - } - else if (message->qos == QOS2) - { - if (waitfor(PUBCOMP, timer) == PUBCOMP) - { - int type, dup, mypacketid; - if (MQTTDeserialize_ack(&type, &dup, &mypacketid, readbuf, MAX_MQTT_PACKET_SIZE) != 1) - rc = FAILURE; - } - else - rc = FAILURE; - } - -exit: - return rc; -} - - -template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int b> -int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::disconnect() -{ - int rc = FAILURE; - Timer timer = Timer(command_timeout_ms); // we might wait for incomplete incoming publishes to complete - int len = MQTTSerialize_disconnect(buf, MAX_MQTT_PACKET_SIZE); - if (len > 0) - rc = sendPacket(len, timer); // send the disconnect packet - - return rc; -} - - -#endif \ No newline at end of file
--- a/MQTT/MQTTPacket.lib Tue May 20 14:33:32 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -http://mbed.org/teams/mqtt/code/MQTTPacket/#3893bc7343f4
--- a/UbloxLib.lib Tue May 20 14:33:32 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -http://mbed.org/teams/ublox/code/UbloxLib/#caf0014375cb
--- a/main.cpp Tue May 20 14:33:32 2014 +0000 +++ b/main.cpp Tue May 27 09:23:07 2014 +0000 @@ -24,7 +24,6 @@ */ #include "mbed.h" -#include "MbedIPStack.h" //------------------------------------------------------------------------------------ // You need to configure these cellular modem / SIM parameters. @@ -44,38 +43,44 @@ //------------------------------------------------------------------------------------ #include "C12832.h" +#if defined(TARGET_LPC1768) && !defined(TARGET_UBLOX_C027) +C12832 lcd(p5, p7, p6, p8, p11); // The classic TARGET_MBED_LPC1768 +#else C12832 lcd(D11, D13, D12, D7, D10); +#endif -#include "FP.cpp" +#include "MQTTSocket.h" #include "MQTTClient.h" int arrivedcount = 0; - -void messageArrived(MQTT::Message* message) + +void messageArrived(MQTT::MessageData& md) { + MQTT::Message &message = md.message; lcd.cls(); lcd.locate(0,3); - printf("Message arrived: qos %d, retained %d, dup %d, packetid %d\n", message->qos, message->retained, message->dup, message->id); - printf("Payload %.*s\n", message->payloadlen, (char*)message->payload); + printf("Message arrived: qos %d, retained %d, dup %d, packetid %d\n", message.qos, message.retained, message.dup, message.id); + printf("Payload %.*s\n", message.payloadlen, (char*)message.payload); ++arrivedcount; - lcd.puts((char*)message->payload); + lcd.puts((char*)message.payload); } - + + int main(int argc, char* argv[]) { MDMSerial mdm; //mdm.setDebug(4); // enable this for debugging issues if (!mdm.connect(SIMPIN, APN,USERNAME,PASSWORD)) return -1; - - IPStack ipstack = IPStack(); - float version = 0.43; + + MQTTSocket ipstack = MQTTSocket(); + float version = 0.47; char* topic = "mbed-sample"; lcd.printf("Version is %f\n", version); printf("Version is %f\n", version); - MQTT::Client<IPStack, Countdown> client = MQTT::Client<IPStack, Countdown>(ipstack); + MQTT::Client<MQTTSocket, Countdown> client = MQTT::Client<MQTTSocket, Countdown>(ipstack); char* hostname = "m2m.eclipse.org"; int port = 1883; @@ -86,18 +91,15 @@ MQTTPacket_connectData data = MQTTPacket_connectData_initializer; data.MQTTVersion = 3; - data.clientID.cstring = "mbed-icraggs"; - rc = client.connect(&data); - if (rc != 0) + data.clientID.cstring = "mbed-sample"; + if ((rc = client.connect(&data)) != 0) lcd.printf("rc from MQTT connect is %d\n", rc); - rc = client.subscribe(topic, MQTT::QOS1, messageArrived); - if (rc != 0) { - printf("rc from MQTT subscribe is %d\n", rc); - } - + if ((rc = client.subscribe(topic, MQTT::QOS1, messageArrived)) != 0) + lcd.printf("rc from MQTT subscribe is %d\n", rc); + MQTT::Message message; - + // QoS 0 char buf[100]; sprintf(buf, "Hello World! QoS 0 message from app version %f\n", version); @@ -126,23 +128,20 @@ while (arrivedcount == 2) client.yield(100); - rc = client.unsubscribe(topic); - if (rc != 0) { + if ((rc = client.unsubscribe(topic)) != 0) printf("rc from unsubscribe was %d\n", rc); - } - rc = client.disconnect(); - if (rc != 0) { + if ((rc = client.disconnect()) != 0) printf("rc from disconnect was %d\n", rc); - } - + + ipstack.disconnect(); mdm.disconnect(); mdm.powerOff(); lcd.cls(); lcd.locate(0,3); - lcd.printf("Finish: %d msgs\n", arrivedcount); + lcd.printf("Version %.2f: finish %d msgs\n", version, arrivedcount); printf("Finishing with %d messages received\n", arrivedcount); - while(true); -} + return 0; +} \ No newline at end of file
--- a/mbed-rtos.lib Tue May 20 14:33:32 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -http://mbed.org/users/mbed_official/code/mbed-rtos/#5dfe422a963d