Re: error reading from socket

Ian Collins <>
Sat, 22 Jul 2006 14:32:55 +1200
<> wrote:

I am trying to send an integer from Java Client to C++ server. I
figured out how to do the conversion. However, I have a problem reading
from the socket.

What is your problem and where are your tests?

This is my code:

int DataInputStream::readInt()//reads one integer from the client
   int32_t var1;
   soc->recv((void*)&var1, 4);
   var1 = ntohl(var1);
   return var1;

I am assuming that I need a loop, but I cannot figure out which one. I
tried all cases that I could imagine, but none of them worked.
I MUST use recv function. Here is how it is defined:

A loop for what?

int recv(void *buffer, int bufferLen)
    throw(SocketException) {

Exception specifications (other than throw()) tend to be more of
hindrance than a help. Consider what happens if another exception gets

  int rtn;
  if ((rtn = ::recv(sockDesc, (raw_type *) buffer, bufferLen, 0)) < 0)
    throw SocketException("Received failed (recv())", true);

  return rtn;

Any help is appreciated.

Ian Collins.

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