On Thu, 24 Jun 2010 17:22:48 +0200, Emmanuel Lecharny <[email protected]> wrote: >> >> So to get it clear: If I now wish to change the buffer's size, I have to >> do it on server side BEFORE i call "bind()" on the acceptor, correct? > > 100% correct.
fine. >> If it's afterwards not possible to change the buffer size, should't there >> be at least a note in the javadoc, or the better an exception? > > In fact, it's already documented in the Java api : > http://java.sun.com/j2se/1.4.2/docs/api/java/net/Socket.html#setReceiveBufferSize%28int%29 > > " The value of SO_RCVBUF is also used to set the TCP receive window that > is advertized to the remote peer. Generally, the window size can be > modified at any time when a socket is connected. However, if a receive > window larger than 64K is required then this must be requested *before* > the socket is connected to the remote peer. There are two cases to be > aware of: > > 1. For sockets accepted from a ServerSocket, this must be done by > calling |ServerSocket.setReceiveBufferSize(int)| > <http://java.sun.com/j2se/1.4.2/docs/api/java/net/ServerSocket.html#setReceiveBufferSize%28int%29> > before the ServerSocket is bound to a local address. > > 2. For client sockets, setReceiveBufferSize() must be called before > connecting the socket to its remote peer." I read this too. But didn't you say that it's not possible to change the buffer size after the server is connected? According to this javadoc, the socket's (client+server) allows this (at least for sizes <=64k).
