Important Updates:

- FunctionCore:
  - Output() returns largest no of bytes written to linked input
- SelectableCore:
  - Auto-manage:
    - Add AutoManage param -> Persistent
    - Will automatic open port if written to when Auto-Manage enabled
    - Will keep port open (re-open if closed) if Persistent = true
  - DNS resolve:
    - Set AddressFailed if port could not open/bind
    - Only use next resolved address if current address failed

FunctionCore.cpp

@@ -469,7 +469,9 @@ int CFunctionCore::Output( const char * ChannelName, const char * Data, int Len
 
 int CFunctionCore::Output( const TChannel * Channel, const char * Data, int Len )
 {
-    TChannelLink   * OutChannel    = NULL;
+    TChannelLink    * OutChannel    = NULL;
+    int             TempLen         = 0;
+    int             OutLen          = 0;
 
     // Validate
     if (!Channel || !Data) {
@@ -491,12 +493,13 @@ int CFunctionCore::Output( const TChannel * Channel, const char * Data, int Len
     }
     OutChannel = Channel->FirstOutput;
     while (OutChannel) {
-        OutChannel->Function->Input( OutChannel->Name, Data, Len );
+        TempLen = OutChannel->Function->Input( OutChannel->Name, Data, Len );
+        OutLen = (TempLen > OutLen)? TempLen : OutLen;
         OutChannel = OutChannel->Next;
     }
 
     // Return processed bytes
-    return Len;
+    return OutLen;
 }
 //---------------------------------------------------------------------------
 

SelectableCore.cpp

@@ -129,6 +129,7 @@ bool  CSelectableCore::LoadConfigData()
 
         // Set Auto Mange
         SetAutoManage( Handle, DataTree->GetBool( TempMember, "AutoManage/Enabled", true, true ),
+                               DataTree->GetBool( TempMember, "AutoManage/Persistent", false, true ),
                                DataTree->GetInt( TempMember, "AutoManage/ReopenDelay", 2000, true ) );
 
         // Input buffer
@@ -377,7 +378,7 @@ bool CSelectableCore::SetCallback( THandle * Handle, EConnectState pState, FHand
 }
 //---------------------------------------------------------------------------
 
-bool CSelectableCore::SetAutoManage( THandle * Handle, bool AutoManage, int ReopenDelay )
+bool CSelectableCore::SetAutoManage( THandle * Handle, bool AutoManage, bool Persistent, int ReopenDelay )
 {
     // Validate
     if (!Handle) {
@@ -386,6 +387,7 @@ bool CSelectableCore::SetAutoManage( THandle * Handle, bool AutoManage, int Reop
 
     // Set params
     Handle->AutoManage  = AutoManage;
+    Handle->Persistent  = Persistent;
     Handle->ReopenDelay = ReopenDelay;
     return true;
 }
@@ -574,13 +576,23 @@ bool  CSelectableCore::ResolveAddress( THandle * Handle )
     struct  addrinfo    hints;
     int                 result;
 
-    // Check if more addresses
+    // Check if resolved address available
     if (Handle->AddressInfo)
+    {
+        // Return if address still valid
+        if (!Handle->AddressFailed)
+            return true;
+
+        // Get next address
         Handle->AddressInfo = Handle->AddressInfo->ai_next;
+        Handle->AddressFailed = false;
+    }
+
+    // Dismiss invalid "0.0.0.0" address
     if (Handle->AddressInfo && !strcmp( inet_ntoa(((struct sockaddr_in *)Handle->AddressInfo->ai_addr)->sin_addr), "0.0.0.0" ))
         Handle->AddressInfo = Handle->AddressInfo->ai_next;
 
-    // Return address
+    // Check valid address
     if (Handle->AddressInfo) {
         if (Log)  Log->Message( LogLevel, dlMedium, "%s: Handle '%s' - Use next resolved Address [%s:%s]->[%s:%u]",
                                                     Name, Handle->Name, Handle->HostName, Handle->PortName,
@@ -712,6 +724,7 @@ int CSelectableCore::OpenServerSocket( THandle * Handle )
         close( Handle->FD );
         Handle->FD = -1;
         ChangeState( Handle, csFailed );
+        Handle->AddressFailed = true;
         return -1;
     };
 
@@ -725,6 +738,7 @@ int CSelectableCore::OpenServerSocket( THandle * Handle )
         close( Handle->FD );
         Handle->FD = -1;
         ChangeState( Handle, csFailed );
+        Handle->AddressFailed = true;
         return -1;
     };
 
@@ -938,6 +952,7 @@ int CSelectableCore::OpenClientSocket( THandle * Handle )
         // Close socket
         close( Handle->FD );
         ChangeState( Handle, csFailed );
+        Handle->AddressFailed = true;
 
         // Start re-open timer
         SetStartTime( &(Handle->ReopenStart) );
@@ -978,6 +993,11 @@ int CSelectableCore::Open( THandle * Handle )
         default:
             FD = -1;
     }
+
+    // Clear timer
+    if ((Handle->State == csOpen) || (Handle->State == csWaitingtoOpen)) {
+        ClearStartTime( &Handle->ReopenStart );
+    }
     return FD;
 };
 //---------------------------------------------------------------------------
@@ -1149,8 +1169,25 @@ bool CSelectableCore::Write( THandle * Handle )
     int     BytesWritten    = 0;
 
     // Validate
-    if (!Handle || (Handle->State == csNone) || (Handle->State == csFailed) || (Handle->State == csClosed)) {
+    if (!Handle || (Handle->State == csNone) || (Handle->State == csFailed) || (Handle->State == csClosed))
-        return false;
+    {
+        if (Handle->AutoManage)
+        {
+            // Check duration since last PortIn
+            if (Timeout( Handle->ReopenStart, Handle->ReopenDelay ))
+            {
+                // Complete opening process
+                if (Open( Handle ) == -1) {
+                    // Reset Timer
+                    SetStartTime( &(Handle->ReopenStart) );
+                }
+            }
+        }
+        else
+        {
+            // Must be opened manually
+            return false;
+        }
     }
 
     // Log Ready for Write Event
@@ -1348,10 +1385,27 @@ int CSelectableCore::Input( const char * ChannelName, const char * Data, int Len
         if (Log)  Log->Message( LogLevel, dlHigh, "%s: Channel '%s' -  Input rejected, Channel input disabled", Name, ChannelName );
         return 0;
     }
-    else if (Handle->State != csOpen) {
+    else if ((Handle->State != csOpen))
-        // Handle is not open
+    {
-        if (Log)  Log->Message( LogLevel, dlHigh, "%s: Channel '%s' - Input rejected, Handle not Open", Name, ChannelName );
+        // Check if auto-managed handle
-        return 0;
+        if (!Handle->AutoManage)
+        {
+            // Handle is not open or auto-managed
+            if (Log)  Log->Message( LogLevel, dlHigh, "%s: Channel '%s' - Input rejected, Handle not Open (not auto-managed)", Name, ChannelName );
+            return 0;
+        }
+        else
+        {
+            // Try to Open handle
+            if (Log)  Log->Message( LogLevel, dlHigh, "%s: Channel '%s' - Input held, Trying to open (auto-managed) Handle", Name, ChannelName );
+            Open( Handle );
+
+            // Check if Handle is open
+            if (Handle->State != csOpen) {
+                if (Log)  Log->Message( LogLevel, dlHigh, "%s: Channel '%s' - Input rejected, Handle not Open", Name, ChannelName );
+                return 0;
+            }
+        }
     }
 
     // Log event
@@ -1434,7 +1488,7 @@ bool CSelectableCore::Process()
     while (Handle)
     {
         // Auto manage handles
-        if (Handle->AutoManage && ((Handle->State == csNone) || (Handle->State == csFailed) || (Handle->State == csClosed)))
+        if (Handle->AutoManage && Handle->Persistent && ((Handle->State == csNone) || (Handle->State == csFailed) || (Handle->State == csClosed)))
         {
             // Check duration since last PortIn
             if (Timeout( Handle->ReopenStart, Handle->ReopenDelay ))

SelectableCore.h

@@ -75,7 +75,9 @@ struct SHandle {
     // State
     int             FD;
     EConnectState   State;
+
     bool            AutoManage;
+    bool            Persistent;
 
     // Callback functions
     FHandleCallback StateCallback[ 6 ];
@@ -89,6 +91,7 @@ struct SHandle {
     char            * PortName;     // Socket port no or protocol, e.g. "80" or "HTTP"
     struct addrinfo * AddressList;  // List of resolved IP Addresses for host name
     struct addrinfo * AddressInfo;  // Current selected IP Address
+    bool            AddressFailed;  // Indicate failure to connect to address
     bool            KeepAlive;      // Socket keep alive
 
     // Buffers
@@ -241,7 +244,7 @@ public:
 
     THandle *   CreateHandle( const char * HandleName, bool CreateChannel );
     bool    SetCallback( THandle * Handle, EConnectState pState, FHandleCallback pCallback );
-    bool    SetAutoManage( THandle * Handle, bool AutoManage, int ReopenTime = 0 );
+    bool    SetAutoManage( THandle * Handle, bool AutoManage, bool Persistent, int ReopenTime = 0 );
     bool    SetBuffers( THandle * Handle, int InBufSize, int OutBufSize, int InTimeout, const char * InMarker, int InMarkerLen );
     bool    SerialConfig( THandle * Handle, int Baud, short DataBits, short StopBits, short Parity, short FlowCtrl, int Wait );