Creating network connections with Godot is simple — as long as you have the other party’s IP address, and there’s no NAT gateway involved. Unfortunately, that’s exactly the problem in most cases. You don’t know the other party’s IP, and these days, just about everyone is behind a combination wifi router/gateway/firewall with NAT.
Conceptually, NAT hole-punching is pretty simple, and this video explains how it’s done with just netcat.
In a nutshell:
listen on a particular port (e.g. 50001)
nc -u -l 50001
echo ‘hello’ | nc -u ipaddr 50001
echo ‘hole punch’ | nc -u -p 50001 ipaddr 50002
third party exchanges ip addresses
Putting it all together, player A (hosting a game) would require the game to connect to the directory server.
The directory server would list the game as something a player can now connect to.
player B (client who wants to join) will tell the directory service that it wants to connect, and will send its info
The directory server forwards the information to player A (host), player A will then send a packet to player B, and respond to the directory server
The directory server will then tell player B to go ahead and connect to player A.
Player B should be able to punch through to player A
With Godot, the connections from client to host would use ENetMultiplayerPeer.create_client(), which can specify the local port.
Godot Engine 4.0 has been released per official announcement. With version 4.0, Godot has gone through “3+ years of breaking and rebuilding from the ground up, a complete core overhaul and a full engine rewrite, through 17 alphas, 17 betas and 6 release candidates“. The announcement post is credited to “2000+ Godot contributors.” It’s a …
In this 2018 GDC session, Spry Fox‘s Daniel Cook explains how to keep human beings from being treated as interchangeable, disposable, or abusable when designing multiplayer games. If you’re developing, or thinking about developing a multiplayer game, this is a great talk to better understand the challenges of designing multiplayer interactions that result in more …
A smaller update. The inventory components now have custom icons to make it easier to tell them apart. This release also includes additional bug fixes:
Version 1.0 of the Inventory System is now available. It includes a few new additions since the closed beta: Lots of fixes found their way into this release as well:
Creating a UDP peer-to-peer connection
Creating network connections with Godot is simple — as long as you have the other party’s IP address, and there’s no NAT gateway involved. Unfortunately, that’s exactly the problem in most cases. You don’t know the other party’s IP, and these days, just about everyone is behind a combination wifi router/gateway/firewall with NAT.
Conceptually, NAT hole-punching is pretty simple, and this video explains how it’s done with just netcat.
In a nutshell:
Putting it all together, player A (hosting a game) would require the game to connect to the directory server.
With Godot, the connections from client to host would use ENetMultiplayerPeer.create_client(), which can specify the local port.
Here’s an older example of a signaling server: https://github.com/Faless/gd-webrtc-signalling/tree/master
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Design Patterns for Building Friendships
In this 2018 GDC session, Spry Fox‘s Daniel Cook explains how to keep human beings from being treated as interchangeable, disposable, or abusable when designing multiplayer games. If you’re developing, or thinking about developing a multiplayer game, this is a great talk to better understand the challenges of designing multiplayer interactions that result in more …
Inventory System v1.4 available
A smaller update. The inventory components now have custom icons to make it easier to tell them apart. This release also includes additional bug fixes:
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Version 1.0 of the Inventory System is now available. It includes a few new additions since the closed beta: Lots of fixes found their way into this release as well: