Question

In node.js, it is possible to have a half-open socket. This means that the socket can become read or write only without closing the whole socket. An example for this:

var net = require("net");
net.createServer({allowHalfOpen:true},function(c){
    c.on("data",function(d){
        console.log(d+"");
    });
    c.on("end",function(){
        console.log("ended");
        c.end("thx");
    });
}).listen(888);

var c = net.connect(888,function(){
    c.end("hi");
    c.on("data",function(d){
        console.log(d+"");
    });
    c.on("end",function(){
        console.log("ended");
    });
});

Output:

hi
ended
thx
ended

Is there a way in C# to close only one direction of the socket? Also, is there a way to know if a socket is readable but not writable and vice versa?

Answer 1

Yes. There is a ‘shutdown output’ operation in TCP, and there is an API for it in C#. Have another look.