Fix TLS read/write dispatch on tls branch

TCPSocket inherits from both Socket and TLS, both declaring receiveData()
as unrelated sibling methods - only Socket::receiveData was virtual, so
TLS::receiveData (SSL_read) was never reached regardless of TLS config,
and even when reached its result was never forwarded to onDataReceived
(that call was commented out). Added an explicit TCPSocket::receiveData
override dispatching to TLS::receiveData or Socket::receiveData based on
tlsInfo, and completed TLS::receiveData to actually return/forward the
decrypted bytes.

Write path did not exist at all. Added Socket::sendData() as a new
virtual hook mirroring receiveData, routed Socket::writeSocket() through
it instead of a raw ::write(), added TLS::sendData() (SSL_write, same
error-handling style as the existing TLS methods), and TCPSocket::sendData()
dispatching the same way the read side does.

Also fixed: a queued write in writeSocket() was being popped off the fifo
as if sent even when shutDown was true and nothing was actually written;
removed a dead empty if(tlsInfo){} stub in onDataReceived, no longer
needed now dispatch happens one level up; replaced leftover debug
std::cout lines with proper Log() calls matching the rest of the file.

Verified via full local compile: all 20 .cpp files build clean, link
into libServerCore.a, and nm confirms the new/fixed symbols are correctly
defined in the right object files.

Socket.cpp

@@ -70,7 +70,7 @@ namespace core
    bool Socket::eventReceived(struct epoll_event event, long long eventId) {
       coreutils::Log(coreutils::LOG_DEBUG_1) << "Event process beginning for socket " << getDescriptor();
       if(inHandler)
-++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++	coreutils::Log(coreutils::LOG_DEBUG_2) << "inHandler was already true.";
+         coreutils::Log(coreutils::LOG_DEBUG_2) << "inHandler was already true.";
       inHandler = true;
       if(event.events & EPOLLRDHUP) {
          coreutils::Log(coreutils::LOG_DEBUG_2) << "EPOLLRDHUP";
@@ -139,13 +139,18 @@ namespace core
       }
    }
    
+   int Socket::sendData(const char *data, int length) {
+      return ::write(descriptor, data, length);
+   }
+
    void Socket::writeSocket() {
       outlock.lock();
       //      coreutils::Log(coreutils::LOG_DEBUG_3) << "writing data to socket " << getDescriptor();
       if(fifo.size() > 0) {
-	 if(!shutDown)
-	   int rc = ::write(descriptor, fifo.front().c_str(), fifo.front().length());
-         fifo.pop();
+	 if(!shutDown) {
+	   sendData(fifo.front().c_str(), fifo.front().length());
+           fifo.pop();
+         }
       }
       outlock.unlock();
    }

Socket.h

@@ -173,6 +173,15 @@ namespace core {
 
       virtual void receiveData(coreutils::ZString &buffer);
 
+      ///
+      /// sendData writes data to the socket descriptor. TLS layer overrides this to
+      /// write through SSL instead of a raw socket write.
+      ///
+      /// @return The number of bytes written, or -1 on error.
+      ///
+
+      virtual int sendData(const char *data, int length);
+
     private:
 
       std::string text;

TCPSocket.cpp

@@ -27,11 +27,26 @@ namespace core {
       out << "|" << ipAddress.getClientAddressAndPort();
    }
 
-   void TCPSocket::onDataReceived(coreutils::ZString &data) {
-
+   void TCPSocket::receiveData(coreutils::ZString &buffer) {
       if(tlsInfo) {
-	 
+	 int len = TLS::receiveData(buffer);
+	 if(len >= 0) {
+	    coreutils::ZString zbuffer(buffer.getData(), len);
+	    onDataReceived(zbuffer);
+	 }
+      } else {
+	 Socket::receiveData(buffer);
       }
+   }
+
+   int TCPSocket::sendData(const char *data, int length) {
+      if(tlsInfo)
+	return TLS::sendData(data, length);
+      else
+	return Socket::sendData(data, length);
+   }
+
+   void TCPSocket::onDataReceived(coreutils::ZString &data) {
 
       if (data.getLength() > 0) {
 	 lineBuffer = (char *)realloc(lineBuffer, lineBufferSize + data.getLength());

TCPSocket.h

@@ -104,6 +104,25 @@ namespace core {
       
       void setBlockSize(int size = 0);
       
+      ///
+      /// Dispatches to TLS::receiveData (SSL_read) when this socket was constructed with a
+      /// TLSInfo/SSL_CTX, otherwise falls back to Socket::receiveData (plain ::read). Needed
+      /// because Socket and TLS both declare receiveData as unrelated sibling methods -
+      /// Socket::receiveData is virtual but TLS::receiveData does not override it, so without
+      /// this explicit override TLS::receiveData would never be reached and encrypted bytes
+      /// would be handed to onDataReceived as if they were plaintext.
+      ///
+
+      virtual void receiveData(coreutils::ZString &buffer) override;
+
+      ///
+      /// Dispatches to TLS::sendData (SSL_write) when this socket was constructed with a
+      /// TLSInfo/SSL_CTX, otherwise falls back to Socket::sendData (plain ::write). Mirrors
+      /// the receiveData override above for the write path.
+      ///
+
+      virtual int sendData(const char *data, int length) override;
+
     protected:
       bool term = false;
       TLSInfo *tlsInfo;

TLS.cpp

@@ -134,14 +134,14 @@ namespace core {
       
    }
    
-   void TLS::receiveData(coreutils::ZString &buffer) {
+   int TLS::receiveData(coreutils::ZString &buffer) {
 
       int len;
-      std::cout << "receiveData TLS" << std::endl;
+      coreutils::Log(coreutils::LOG_DEBUG_3) << "receiveData TLS on socket.";
 
       if((len = ::SSL_read(ssl, buffer.getData(), buffer.getLength())) >= 0) {
-	 std::cout << "receiveData TLS...len=" << len << ":" << buffer << std::endl;
-//	 onDataReceived(buffer);             
+	 coreutils::Log(coreutils::LOG_DEBUG_3) << "receiveData TLS...len=" << len;
+	 return len;
       }
       else {
 	 switch (SSL_get_error(ssl, len)) {
@@ -161,6 +161,38 @@ namespace core {
 	    coreutils::Log(coreutils::LOG_DEBUG_3) << "Unknown ERROR on ssl_read.";
 	    break;
 	 }
+	 return -1;
+      }
+
+   }
+
+   int TLS::sendData(const char *data, int length) {
+
+      int len;
+
+      if((len = ::SSL_write(ssl, data, length)) >= 0) {
+	 coreutils::Log(coreutils::LOG_DEBUG_3) << "sendData TLS...len=" << len;
+	 return len;
+      }
+      else {
+	 switch (SSL_get_error(ssl, len)) {
+	  case SSL_ERROR_SSL:
+	    coreutils::Log(coreutils::LOG_DEBUG_3) << "ERROR_SSL on ssl_write. error=" << errno;
+	    break;
+	  case SSL_ERROR_WANT_READ:
+	    coreutils::Log(coreutils::LOG_DEBUG_3) << "ERROR_WANT_READ on ssl_write.";
+	    break;
+	  case SSL_ERROR_WANT_WRITE:
+	    coreutils::Log(coreutils::LOG_DEBUG_3) << "ERROR_WANT_WRITE on ssl_write.";
+	    break;
+	  case SSL_ERROR_SYSCALL:
+	    coreutils::Log(coreutils::LOG_DEBUG_3) << "ERROR_SYSCALL on ssl_write. errno=" << errno;
+	    break;
+	  default:
+	    coreutils::Log(coreutils::LOG_DEBUG_3) << "Unknown ERROR on ssl_write.";
+	    break;
+	 }
+	 return -1;
       }
 
    }

TLS.h

@@ -49,7 +49,8 @@ namespace core {
       SSL_CTX *ctx;   
       
     protected:
-      void receiveData(coreutils::ZString &buffer);
+      int receiveData(coreutils::ZString &buffer);
+      int sendData(const char *data, int length);
       void registerSocket(int fd);
       void acceptSocket();