Socket Programming (Client recieving invalid characters)

Ok, i shall try it out and let you know again. Thanks!

Hi mwcmp,

jkr has the right idea, but the code has a couple errors.  you need to make sure you null terminate the buffer before the end of the buffer... so for a buffer of length 32 you only want to read 31 bytes, and then put the 0 terminator in the 31st position (since arrays are 0 based).  


    int bytesRecv = SOCKET_ERROR;
    char recvbuf[32] = "";

    while( bytesRecv == SOCKET_ERROR ) {
        bytesRecv = recv( m_socket, recvbuf, 31, 0 );
        if ( bytesRecv == 0 || bytesRecv == WSAECONNRESET ) {
            // error
        }

    // zero-terminate string according to the amount of bytes received
    recvbuf[bytesRecv] = 0;


good luck,
aaron

<disclaimer>

hey jkr, you da man around these parts so i by no means meant to step on anyones toes.  keep up the great info.

peace. -a

HI Friend,
            i dont know what are using , I wanna ask are u making the client/server socket architecture in MFC based classes like CSocket or CAsyncSocket or are using raw Socket Api's
if you are using the raw Api like this

int recv(
  SOCKET s,      
  char FAR *buf,  
  int len,        
  int flags      
);

the total byte of data recv is returned by the above function
and  you create the string like that

    char buffer[1000];
     int iRec=recv(hSocket,buffer,999,0);
     buffer[iRec]=NULL;
   is the required string by you

Now in MFC
int Receive( void* lpBuf, int nBufLen, int nFlags = 0 );

it s same functionality

i think it will help

   

>>jkr has the right idea, but the code has a couple errors

That's a sample just taken to illustrate the zero-termination :o)

  int bytesRecv = SOCKET_ERROR;
    char recvbuf[32] = "";

    SOCKET AcceptSocket;

      // Receive data to the server
    while (1)
      {
        AcceptSocket = SOCKET_ERROR;
        while ( AcceptSocket == SOCKET_ERROR )
            {
            AcceptSocket = accept( m_socket, NULL, NULL );
        }
            tmp_socket = m_socket;
        m_socket = AcceptSocket;
        break;
    }


That's my current codes, how should i change to remove those invalid characters?