Socket Programming Connect bind error

[vmgunda]

Hi,
I am new to Symbian world. I really stuck with socket programming. I was doing simple client/server program. When I execute the Server program, I am getting error in the accept call. It is not waiting for any request to accept. That is why I have put the user::waitforrequest()

When I execute the client program it gives binding error 10048.

FYI: I am running two programs from same carbide window.

Here is my questions:
1. Why accept call does not block for the request to accept (may i am comparing unix socket programming, if rectify me concept)
2. In the connect we never bind, still why we are getting the binding error.
3. In my code I have given the port number 8100, but bind error gives the port number as 3651, I have not got why the port number is changed.


really I am confused, is it I need to run both program 2 different carbide C++, or am making any mistake in the code.
TInetAddr iAddr;
RSocketServ iSocketServ;
RSocket iSocket;
RSocket iAccept;
const TUint32 KInetAddr = INET_ADDR(127,0,0,1);

iAddr.SetAddress(KInetAddrAny);
iAddr.SetPort(8100);
TRequestStatus iRequestStatus;

// Add to scheduler
TInt iReturn = iSocketServ.Connect();
if(iReturn != KErrNone)console->Write(_L("connected to RsocketServer"));

iReturn = iSocket.Open(iSocketServ,KAfInet,KSockStream,KProtocolInetTcp );

if(iReturn != KErrNone) console->Write(_L("open the socket\n"));
iReturn = iSocket.Bind(iAddr);
if(iReturn != KErrNone)console->Write(_L("Bind is successful\n"));
iReturn = iSocket.Listen(20);
if(iReturn != KErrNone)console->Write(_L("Listening successful\n"));
iReturn = iAccept.Open(iSocketServ);
if(iReturn != KErrNone)console->Write(_L("Blank Socket is created"));
iSocket.Accept(iAccept,iRequestStatus);
if(iRequestStatus.Int() != KErrNone)console->Write(_L("Success Accept\n"));
User::WaitForRequest(iRequestStatus);
console->Write(_L("Hello, world!\n"));
console->Write(_L("Hello, world!\n"));


Client:

LOCAL_C void MainL()
{
//
// add your program code here, example code below
//
RSocketServ iServSocket;
RSocket iSocket;
TRequestStatus aStatus;

TInetAddr destAddr;

destAddr.SetAddress(INET_ADDR(127,0,0,1));
destAddr.SetPort(8100);


iServSocket.Connect();
User::LeaveIfError(iSocket.Open(iServSocket,KAfInet,KSockStream,KProtocolInetTcp));
iSocket.Connect(destAddr,aStatus);
if(aStatus.Int()!=KErrNone) console->Write(_L("Error connecting socket...\n"));
console->Write(_L("Hello, world!\n"));
}

LOCAL_C void DoStartL()
{
// Create active scheduler (to run active objects)
CActiveScheduler* scheduler = new (ELeave) CActiveScheduler();
CleanupStack::PushL(scheduler);
CActiveScheduler::Install(scheduler);

MainL();

// Delete active scheduler
CleanupStack::PopAndDestroy(scheduler);
}


Here is piece of code of client and server program:

[wizard_hu_]

Since you can not easily have two Carbides executing two emulators (if you have a single SDK only), the one Carbide-one emulator is a better configuration. Though switching between 2 console executables is not trivial; if you have a simple console->GetCh, it is going to be triggered by pressing the menu button.
You may consider revising your if-s, sometimes you check for something==KErrNone, sometimes you check for something!=KErrNone. Instead of constant literals, you may rather want to use formatted descriptors, and simply print the code:

TInt iReturn = iSocketServ.Connect();
if(iReturn != KErrNone)console->Write(_L("connected to RsocketServer"));

could be

TBuf<100> buf;
buf.Format(_L("iSocketServ.Connect: %d\n"),iSocketServ.Connect());
console->Write(buf);

Then you could de-code the error codes checking http://wiki.forum.nokia.com/index.php/Error_codes
Also note that S60 3rd edition SDK-s come with Chat example, which contains a TCP/IP part too.