Why Channel.isConnected() returned true even though there is no UDP server?

[dbevenius]

Hi Hez,

my understanding of this is that connecting a DatagramSocket differs from
connecting a stream socket. Connecting a DatagramSocket means that datagrams
from any source address other than the one to which the socket is
connect():ed will be ignored (packets will be dropped by the networking
layer). Connecting also has the benifit of not requiring security checks on
each packets reducing overhead.
Returning true for isConnected() is reasonable I think as it is only saying
that this socket will send/receive to/from localhost:8899. When/if you use
the underlying socket to send/recieve it will probably throw an
PortUnreachableException.

Regards,

/Daniel



2009/4/20 Hez (via Nabble)
<ml-user+38914-235264754 at n2.nabble.com<ml-user%2B38914-235264754 at n2.nabble.com>
>

> Hi
>
> Here is my UDP client snippet,
>
>         ChannelFactory factory = new
> OioDatagramChannelFactory(Executors.newCachedThreadPool());
>         ClientBootstrap bootstrap = new ClientBootstrap(factory);
>         ChannelPipeline pipeline = bootstrap.getPipeline();
>         pipeline.addLast("logger", new LoggingHandler());
>
>         // connect to a non-exist IP address or port
>         ChannelFuture future = bootstrap.connect(new
> InetSocketAddress("localhost", 8899));
>         future.awaitUninterruptibly();
>         Channel channel = future.getChannel();
>
>         // channel.isConnected() returned true?
>         logger.debug("channel.isConnected() returned {}",
> channel.isConnected());
>
>
> when run, the channel.isConnected() returned true even though there is no
> server listening at localhost:8899.
>
> Is this an expected behavior?
>
>
> --
>
> Hez
>
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