Homebrew WIP [Official] switch-lan-play

kwall24 · Jan 3, 2022

From what I gather, in order to play BDSP in Local mode with a friend, we would both need ldn_mitm, and both need CFW, correct? I'd like to be able to local play my CFW with his OFW, but I'm thinking that isn't something we can do.

microchipman · Jan 8, 2022

kwall24 said:
From what I gather, in order to play BDSP in Local mode with a friend, we would both need ldn_mitm, and both need CFW, correct? I'd like to be able to local play my CFW with his OFW, but I'm thinking that isn't something we can do.

We can add dying light to the list, I was able to play it tonight. Worked awesome.

microchipman · Jan 8, 2022

Vaddum said:
Hi there! I own 2 Switches and I'd like to play with both using switch-lan-play. Unfortunately when I launch [lan-play-win64.exe] each Switch is trying to connect to the server by disconnecting the other one... Is there a way to connect them both to play together? Thanks for your help.

Did you make sure each switch was on it's own Ipaddres within the ip/sunet range of 10.13.0.XX - 10.13.254.254? So like 10.13.27.54 and 10.13.27.60 or even 10.13.57.18 and 10.13.54.19. Anyways make sure each IP is unique within that range. Make sure atmosphere is refirecting to 90DNS with a hosts file, or leave raw 90DNS for the DNS settings for the wireless connection.

microchipman · Jan 8, 2022

Vaddum said:
Hi there! I own 2 Switches and I'd like to play with both using switch-lan-play. Unfortunately when I launch [lan-play-win64.exe] each Switch is trying to connect to the server by disconnecting the other one... Is there a way to connect them both to play together? Thanks for your help.

Oddly, I never had this issue yesterday, but I am today...crap.

orangy57 · Jan 16, 2022

this is obviously pretty ignorant, but what would be the logistics of making this into a sysmodule instead of a PC program? This software reminds me of Xlink Kai where the PC creates a Wippien/Hamachi/Tunngle virtual LAN network, and then through some magic that information is sent locally to your console and back when you connect to a specific DNS server. Why couldn't that be done locally on the console itself? Is a there a big overhead in tunneling the information into a virtual network adapter, or are the libraries just not available to do this sort of thing on the switch?

EDIT: This has been answered

VeniaSilente said:
It has been explained before but I don't think there is.

Hopefully someone more understanding of the tech behind this will correct me but in the meantime:

The architecture of the lan-play system is such that you setup your Switch to connect to a private network (*not* a VPN), broadcast over your wifi, and on which the connection to their router is done via a routing mechanism on a second machine (your PC) that pretends to be the real lan-server (that's the closest we get to the "V" in VPN). Your Switch doesn't have to do any more actual work in this respect, only the actual game's local play protocol needs to be considered (and that is done via protocol injection / "man in the middle" (mitm) ).

For the Switch to be able to do on this by its own, the first and foremost thing that would be needed would be that its wireless interface driver was able to host two IPs on two networks (which I already don't know if it's physically doable) so that it can connect to the real wifi for the actual internet access and to the private network at the same time; then it would have the ability to add routing tables that lead to itself, so your Switch can see "a different machine" (itself but on the other network) as the routing exit. And *then* it'd still have to have enough memory and CPU left to run the slp component itself that does the redirection.

Considering that things like Tesla menu overlays get very little leeway to work on the Switch, it's unlikely that all this would work.

OTOH, it's almost fire-and-forget to run the slp component on a Linux machine (there's a docker image for it), or on an Android phone (there's a package for F-Droid).

Sno0t · Nov 25, 2022

Hey everyone

For the life of me I cant get ldn_mitm to run with my remote friend (300km away)

We both use atmos 1.14, Fw 1.15.1, latest sigpatches, latest ldn_mitm. And both on windows PCs.

We setup and configured everything for switch-lan-play according to the install guide on the official site.
(I use 10.13.10.10 , he uses 10.13.10.11 as IP)
When starting lan-play.exe adn then starting tinfoil, the console shows "IConnection:connected" (Used this to check whether the general process works)

However, when we tried Mario Golf and/or WarioWare, neither local nor LAN mode enabled us to see each other.

I later tried to connect to my (local) Ryujinx with both games (LdnMitm).....also to no avail.
(Tested with and without P2P as well as enabled/disabled "Guest Internet Acces/LAN").

What are we missing/doing wrong?
Should we use another server? (using both switch.lan-play.com:11451)

any help is pretty much appreciated.
Thank you in advance and kind regards

scionae · Nov 26, 2022

Sno0t said:
Hey everyone

For the life of me I cant get ldn_mitm to run with my remote friend (300km away)

We both use atmos 1.14, Fw 1.15.1, latest sigpatches, latest ldn_mitm. And both on windows PCs.

We setup and configured everything for switch-lan-play according to the install guide on the official site.
(I use 10.13.10.10 , he uses 10.13.10.11 as IP)
When starting lan-play.exe adn then starting tinfoil, the console shows "IConnection:connected" (Used this to check whether the general process works)

However, when we tried Mario Golf and/or WarioWare, neither local nor LAN mode enabled us to see each other.

I later tried to connect to my (local) Ryujinx with both games (LdnMitm).....also to no avail.
(Tested with and without P2P as well as enabled/disabled "Guest Internet Acces/LAN").

What are we missing/doing wrong?
Should we use another server? (using both switch.lan-play.com:11451)

any help is pretty much appreciated.
Thank you in advance and kind regards

You can try other servers and you can also try rebooting your switch if things don't pan out. From what I read you are doing everything correctly. (to my knowledge)

Sno0t · Nov 26, 2022

scionae said:
You can try other servers and you can also try rebooting your switch if things don't pan out. From what I read you are doing everything correctly. (to my knowledge)

Thank you very much

Choosing different server did the trick(s) for the switches.
Is there any way to get ryujinx to join us there ? (One Switch and the ryujinx PC are normally in the same network, but when the switch is connected via switch-lan-play, ryujinx cant find it)

scionae · Nov 26, 2022

Sno0t said:
Thank you very much
Choosing different server did the trick(s) for the switches.
Is there any way to get ryujinx to join us there ? (One Switch and the ryujinx PC are normally in the same network, but when the switch is connected via switch-lan-play, ryujinx cant find it)

Only if Ryujinx and the Switch are on the SAME network, not the same ldn_mitm server. So far from my testing it doesn't work if you want to play with a distant friend, unfortunately.

librarianmemble · Dec 2, 2022

scionae said:
Only if Ryujinx and the Switch are on the SAME network, not the same ldn_mitm server. So far from my testing it doesn't work if you want to play with a distant friend, unfortunately.

with some work around, you can.
I using a hackedswitch can play with my friend in different island from me just now.
BUT, it's kinda a hassle tho, because you need at least 2 pc.
I play using a switch redirected into a server with my laptop running the lan play client. while my friend use his pc with ryujinx ldn_mitm and network setting same as my switch (bar the ip) and his laptop running the lan play client (the same packet capturing method like switch used to connect to lan play). and both of us are redirected into a server that acts as a "same network" like ryujinx team mentioned

Garuda357 · Dec 5, 2022

librarianmemble said:
with some work around, you can.
I using a hackedswitch can play with my friend in different island from me just now.
BUT, it's kinda a hassle tho, because you need at least 2 pc.
I play using a switch redirected into a server with my laptop running the lan play client. while my friend use his pc with ryujinx ldn_mitm and network setting same as my switch (bar the ip) and his laptop running the lan play client (the same packet capturing method like switch used to connect to lan play). and both of us are redirected into a server that acts as a "same network" like ryujinx team mentioned

Can you share more details on your setup? I've been trying to replicate your success but the best I get is connection errors.

Davidlavaei · Jan 22, 2023

lil-devil said:
run

Code:

sudo lan-play

instead of

Code:

sudo ./lan-play-macos

is for when you download the binary.

the sudo lan-play command didn't work for me it said command not found

dehydrated_lemur · Mar 10, 2023

I have a question or two....or three.
What exactly does ldn.mtm do?
If I'm using dns.mtm & exosphere what should I make my DNS connection be when changing my Internet settings?
If a stock switch can play lan over the internet without ldn.mtm why do we need it on CFW switch?
Can I stay on this connection when not playing online or is it recommended for me to change it back to "automatic" in the Internet settings?

Raugo · Mar 10, 2023

dehydrated_lemur said:
I have a question or two....or three.
What exactly does ldn.mtm do?
If I'm using dns.mtm & exosphere what should I make my DNS connection be when changing my Internet settings?
If a stock switch can play lan over the internet without ldn.mtm why do we need it on CFW switch?
Can I stay on this connection when not playing online or is it recommended for me to change it back to "automatic" in the Internet settings?

ldn.mitm convert the ad-hoc (connection between consoles without using a lan) to a lan connection. Without it you can't use lan-play in some games.

dehydrated_lemur · Mar 10, 2023

Raugo said:
ldn.mitm convert the ad-hoc (connection between consoles without using a lan) to a lan connection. Without it you can't use lan-play in some games.

How can a stock switch do it without ldn.mtm? Do the DNS entries matter at all or can they be anything?

deejay87 · Mar 10, 2023

dehydrated_lemur said:
How can a stock switch do it without ldn.mtm? Do the DNS entries matter at all or can they be anything?

Stock can only play games who don't use ldn_mitm, only with dns, you can see the list on the website

masterspike52 · Apr 18, 2023

Lemme start off by saying switch lan-play is a great thing to use for playing with other people that use it. The problem is there is a mod who's kind of a dickhead for no reason, he doesnt really help anyone at all with anything, and if you ask your met with shitty answers and treated like your a moron. If your in the server and want help with things like hosting your own server or even setting it up, your going to be met with "you don't need your own server" and of course "setup guide is on the website" and then if you try to help someone you get told your spamming the channel, and if you call them out they delete your messages and warn you for posting messages that are off topic. There shouldn't be any reason for anyone to treat anyone with disrespect in any scenario or just because they have a position of power. Like I said switch lan play is great and the creator works extremely hard to make sure it works smoothly but c'mon?

Ecner19 · Aug 29, 2023

Hello. I'm having a problem with trying to play local multiplayer of Risk of Rain 2 with my friend. Just to be clear, he and I need a pc to run the same server in lan-play right? Do we need ldn-mitm? We can't make it work though we've followed the instructions and tried many times. Thanks and any help would be appreciated

Homebrew WIP [Official] switch-lan-play

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