1.19 compatibility?

[rjp]

Trying to use Lure to proxy to my modded 1.19 server and connecting causes a crash.

Connection to 127.0.0.1:52695 ended with: packet contents were not read completely (802 bytes remain)

rustcord and Ultraviolet have a similar problem which suggests 1.19 may have updated the protocol?

[sammwyy]

Lure is fully compatible with 1.19, but in the new versions the way that Forge sends the initial packet is different from the vanilla format.

[rjp]

Ah, I'm guessing that might be the same for Fabric then (not using Forge).

[sammwyy]

It is possible, to check that the client/server have the same version in mods, these packets are sent outside the vanilla protocol.

I will work on an option to create compatibility.

[exalented]

Lure when connecting to paper server: ended with: unexpected packet ID 1 (expected 3)
Paper server response:

1.20.1-server  | [~ INFO]: com.mojang.authlib.GameProfile@14638cbe[id=<null>,name=notch,properties={},legacy=false] (/meme:49392) lost connection: Disconnected

These are my logs trying to proxy a Fabric 1.20 server:

Accepted connection to ip:41734
Connection to ip:41734 ended with: failed to decode field `profile_id` in `LoginStart`: failed to fill whole buffer
Accepted connection to ip:58712
Connection to ip:58712 ended.
Accepted connection to ip:58714
Connection to ip:58714 ended with: unexpected packet ID 1 (expected 3)
Accepted connection to ip:37692
Connection to ip:37692 ended.
Accepted connection to ip:50054
Connection to ip:50054 ended with: unexpected packet ID 1 (expected 3)
Accepted connection to ip:55068
Connection to ip:55068 ended.
Accepted connection to ip:51644
Connection to ip:51644 ended.
Accepted connection to ip:51656
Connection to ip:51656 ended with: unexpected packet ID 1 (expected 3)
Accepted connection to ip:41280
Connection to ip:41280 ended.
Accepted connection to ip:50232
Connection to ip:50232 ended with: unexpected end of file
Accepted connection to ip:50240
Connection to ip:50240 ended.
Accepted connection to ip:55288
Connection to ip:55288 ended with: unexpected end of file
Accepted connection to ip:59890
Connection to ip:59890 ended.
Accepted connection to ip:49536
Connection to ip:49536 ended with: unexpected end of file

What these have in common is how the server responds, logging id=<null>.