Find the address of the server

I wish I could find the address of a server on my LAN.


I was doinking autour (specific local technique therm it) with an idea of game and in my thought process of the design of the game, I want to do the following in the implementation:


I, or anyone can get online to play the game (not a problem, I can program sockets).


When a potential player comes online, they would choose if they want to host the game or just participate and if there are already guests, give them a list that do not exist to join.  This is my problem.  The IP address of the server would not be known at the time of everyone online, and it could be that any address covered in my local block 10.0.0.XXX or 192.168.0.XXX, well, except the address of the router.


In all the work I did in the past, the IP address of the server has always been known.  Also in the examples that I have on the net and my books all assumed that you know the IP address of the server, that is not a problem and I've done several times, but now I'm looking for the basic idea of how "discover a server on the network.


I thought that this day is: use a type of force noise of algo where the client checks literally just everything in the local block using the Protocol for the game.  Which is the way to do it using simple TCP/IP and Java or is there a more elegant way that I'm missing?


I am not coding examples, but just the basic audit idea or approach... even a suggested google search would be appreciated.

As long as it is the local network and the router (or other infrastructure network) does not, you can use a UDP.  When a server comes online and maybe and regular intervals after that, she broadcasts a message "Server" here on a UDP port.

Clients listen on UDP port and collect addresses.

The alternative to this, when UDP is not possible (internet) is to have a dedicated communications server which is accessible to all.  There is no that indicate which servers are up.  Servers to validate the availability and customers ask servers lists.

Tags: Oracle

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