mgillespie/TinyMqtt
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Fix issue_2 broken payload

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This commit is contained in:
hsaturn
2021-09-17 19:51:32 +02:00
parent 36dde2c063
commit d39c58d8f5
2 changed files with 65 additions and 30 deletions
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64
src/TinyMqtt.cpp
View File

@@ -59,7 +59,7 @@ void MqttClient::close(bool bSendDisconnect)
{
debug("close " << id().c_str());
mqtt_connected = false;
if (client)
if (client) // connected to a remote broker
{
if (bSendDisconnect and client->connected())
{
@@ -72,10 +72,16 @@ void MqttClient::close(bool bSendDisconnect)
if (parent)
{
parent->removeClient(this);
parent=nullptr;
parent = nullptr;
}
}
void MqttClient::connect(MqttBroker* parentBroker)
{
close();
parent = parentBroker;
}
void MqttClient::connect(std::string broker, uint16_t port, uint16_t ka)
{
debug("cnx: closing");
@@ -397,12 +403,13 @@ void MqttClient::processMessage(const MqttMessage* mesg)
#ifdef TINY_MQTT_DEBUG
if (mesg->type() != MqttMessage::Type::PingReq && mesg->type() != MqttMessage::Type::PingResp)
{
#ifdef NOT_ESP_CORE
#ifdef NOT_ESP_CORE
Serial << "---> INCOMING " << _HEX(mesg->type()) << " client(" << (dbg_ptr)client << ':' << clientId << ") mem=" << " ESP.getFreeHeap() "<< endl;
#else
#else
Serial << "---> INCOMING " << _HEX(mesg->type()) << " client(" << (dbg_ptr)client << ':' << clientId << ") mem=" << ESP.getFreeHeap() << endl;
#endif
#endif
// mesg->hexdump("Incoming");
mesg->hexdump("Incoming");
}
#endif
auto header = mesg->getVHeader();
@@ -544,6 +551,9 @@ if (mesg->type() != MqttMessage::Type::PingReq && mesg->type() != MqttMessage::T
break;
case MqttMessage::Type::Publish:
#ifdef TINY_MQTT_DEBUG
Serial << "publish " << mqtt_connected << '/' << (long) client << endl;
#endif
if (mqtt_connected or client == nullptr)
{
uint8_t qos = mesg->type() & 0x6;
@@ -558,8 +568,12 @@ if (mesg->type() != MqttMessage::Type::PingReq && mesg->type() != MqttMessage::T
// TODO reset DUP
// TODO reset RETAIN
if (client==nullptr) // internal MqttClient receives publish
if (parent==nullptr or client==nullptr) // internal MqttClient receives publish
{
#ifdef TINY_MQTT_DEBUG
Serial << (isSubscribedTo(published) ? "not" : "") << " subscribed.\n";
Serial << "has " << (callback ? "" : "no ") << " callback.\n";
#endif
if (callback and isSubscribedTo(published))
{
callback(this, published, payload, len); // TODO send the real payload
@@ -613,7 +627,6 @@ MqttError MqttClient::publish(const Topic& topic, const char* payload, size_t pa
MqttMessage msg(MqttMessage::Publish);
msg.add(topic);
msg.add(payload, pay_length, false);
msg.complete();
if (parent)
{
return parent->publish(this, topic, msg);
@@ -637,6 +650,10 @@ MqttError MqttClient::publishIfSubscribed(const Topic& topic, const MqttMessage&
else
{
processMessage(&msg);
#ifdef TINY_MQTT_DEBUG
Serial << "Should call the callback ?\n";
#endif
// callback(this, topic, nullptr, 0); // TODO Payload
}
}
@@ -714,7 +731,7 @@ void MqttMessage::incoming(char in_byte)
reset();
break;
}
if (buffer.length() > MaxBufferLength) // TODO magic 256 ?
if (buffer.length() > MaxBufferLength)
{
debug("Too long " << state);
reset();
@@ -725,36 +742,47 @@ void MqttMessage::add(const char* p, size_t len, bool addLength)
{
if (addLength)
{
buffer.reserve(buffer.length()+addLength+2);
buffer.reserve(buffer.length()+2);
incoming(len>>8);
incoming(len & 0xFF);
}
while(len--) incoming(*p++);
}
void MqttMessage::encodeLength(char* msb, int length) const
void MqttMessage::encodeLength() const
{
if (state != Complete)
{
int length = buffer.size()-2; // 1 byte for header, 1 byte for pre-reserved length field.
std::string::size_type ins=1;
do
{
uint8_t encoded(length & 0x7F);
length >>=7;
if (length) encoded |= 0x80;
*msb++ = encoded;
} while (length);
};
void MqttMessage::complete()
{
encodeLength(&buffer[1], buffer.size()-2);
if (ins==1)
buffer[ins]=encoded;
else
buffer.insert(ins, 1, encoded);
// On pourrait optimiser, cet insert est couteux, il faudrait en fait non pas
// insérer, mais réserver 4 octets pour les remplir
// plus tard avec ke fixed header et la taille.
// Cela changerait en revanche le début du message qui ne serait plus
// buffer[0], mais buffer[0..3] selon la taille du message.
++ins;
} while (length);
state = Complete;
}
}
};
MqttError MqttMessage::sendTo(MqttClient* client) const
{
if (buffer.size())
{
debug("sending " << buffer.size() << " bytes");
encodeLength(&buffer[1], buffer.size()-2);
encodeLength();
// hexdump("snd");
client->write(&buffer[0], buffer.size());
}

19
src/TinyMqtt.h
View File

@@ -101,8 +101,6 @@ class MqttMessage
void add(const Topic& t) { add(t.str()); }
const char* end() const { return &buffer[0]+buffer.size(); }
const char* getVHeader() const { return &buffer[vheader]; }
uint16_t length() const { return buffer.size(); }
void complete();
void reset();
@@ -127,12 +125,12 @@ class MqttMessage
void hexdump(const char* prefix=nullptr) const;
private:
void encodeLength(char* msb, int length) const;
void encodeLength() const;
mutable std::string buffer; // mutable -> sendTo()
uint8_t vheader;
uint16_t size; // bytes left to receive
State state;
mutable State state; // mutable -> encodeLength()
};
class MqttBroker;
@@ -172,7 +170,14 @@ class MqttClient
/** Should be called in main loop() */
void loop();
void close(bool bSendDisconnect=true);
void setCallback(CallBack fun) {callback=fun; };
void setCallback(CallBack fun)
{
callback=fun;
#ifdef TINY_MQTT_DEBUG
Serial << "Callback set to " << (long)fun << endl;
if (callback) callback(this, "test/topic", "value", 5);
#endif
};
// Publish from client to the world
MqttError publish(const Topic&, const char* payload, size_t pay_length);
@@ -214,6 +219,8 @@ class MqttClient
static long counter;
private:
// event when tcp/ip link established (real or fake)
static void onConnect(void * client_ptr, TcpClient*);
#ifdef TCP_ASYNC
static void onData(void* client_ptr, TcpClient*, void* data, size_t len);
@@ -240,7 +247,7 @@ class MqttClient
// (this is the case when MqttBroker isn't used except here)
MqttBroker* parent=nullptr; // connection to local broker
TcpClient* client=nullptr; // connection to mqtt client or to remote broker
TcpClient* client=nullptr; // connection to remote broker
std::set<Topic> subscriptions;
std::string clientId;
CallBack callback = nullptr;