SDL Wiki
(This function is part of SDL_net, a separate library from SDL.)


Create a server, which listens for connections to accept.


SDLNet_Server * SDLNet_CreateServer(SDLNet_Address *addr, Uint16 port);

Function Parameters

address the local address to listen for connections on, or NULL.
the port on the local address to listen for connections on

Return Value

Returns a new SDLNet_StreamSocket, pending connection, or NULL on error; call SDL_GetError() for details.


An app that initiates connection to a remote computer is called a "client," and the thing the client connects to is called a "server."

Servers listen for and accept connections from clients, which spawns a new stream socket on the server's end, which it can then send/receive data on.

Use this function to create a server that will accept connections from other systems.

This function does not block, and is not asynchronous, as the system can decide immediately if it can create a server or not. If this returns success, you can immediately start accepting connections.

You can specify an address to listen for connections on; this address must be local to the system, and probably one returned by SDLNet_GetLocalAddresses(), but almost always you just want to specify NULL here, to listen on any address available to the app.

After creating a server, you get stream sockets to talk to incoming client connections by calling SDLNet_AcceptClient().

Stream sockets don't employ any protocol (above the TCP level), so they can accept connections from clients that aren't using SDL_net, but if you want to speak any protocol beyond an abritrary stream of bytes, such as HTTP, you'll have to implement that yourself on top of the stream socket.

Unlike BSD sockets or WinSock, you specify the port as a normal integer; you do not have to byteswap it into "network order," as the library will handle that for you.

Thread Safety

It is safe to call this function from any thread.


This function is available since SDL_Net 3.0.0.


[ edit | delete | history | feedback | raw ]

[ front page | index | search | recent changes | git repo | offline html ]

All wiki content is licensed under Creative Commons Attribution 4.0 International (CC BY 4.0).
Wiki powered by ghwikipp.