CoD UO: Allow 1.41 and 1.51

Hey,

I'd like to allow both Clientversions (1.41 and 1.51) on my 1.51 server. Is this even possible?
I was trying to take out the version check, but no success yet.
Maybe someone has a tip where I have to change the game..

Has anyone done this with another CoD? Will I get problems with pure-checks?


Thanks :)

Don't bother, most likely you have to modify a whole lot more that's way over your head and too much trouble.
I did it with 1.1 and 1.5 but as I said you have to patch a whole lot of stuff to get it working without the client disconnecting (crash) etc.

Attached is a screenshot of 1.5 and 1.1 CoD1 clients connecting to a 1.1 server if i recall. (could be 1.5, don't remember)
https://xtnded.org/screenshots/hydra.png

Uh I see..
Did the protocol change? I thought about a UDP proxy that could modify some packets, so I don't have to modify the game.. But yea, maybe I'm totally wrong

Quote:

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Originally Posted by fabio

Uh I see..
Did the protocol change? I thought about a UDP proxy that could modify some packets, so I don't have to modify the game.. But yea, maybe I'm totally wrong

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the MSG related stuff with entityState_t and so on are different (which means that the offset in memory for example position and other new/old struct fields could be in a different spot and could disconnect for some other incorrect information received from the client/server) for 1.1 and 1.5 (probably a whole lot more has changed than just this), I don't know for 1.41 and 1.51 UO but most likely there's some changes that will be quite annoying to patch.

For cod4, the protocol has NOT changed since 1.0 to 1.7 if i recall correctly. So for cod4 it could be possible.

Okay, let's say the protocol didn't change.. what else could be a problem?
How can I take out the version check? I guess the client doesn't connect to a wrong version, how can I change this server sided?

change protocol version, change shortversion, change iwd files to older/newer version.

I was able to connect to 1.51 server with 1.41 client, but I get the following error:

CL_ParsePacketEntities: end of message


Not sure how I could fix this.. Probably a change in the protocol..

Do you have any idea?

Thanks a lot!

Start by re-implementing this function: https://github.com/id-Software/Quake...cl_parse.c#L88

Or think a bit bigger... try to understand the whole network protocol. Once you understand it, you can easily connect everything to everything. (CoD4 to CoD1 etc.). I always wanted to have something like this, but I just lack the time.

Well, for now I just modified the packets using a proxy.
This works well with protocol version, statusResponse or infoResponse.

Even the Huff-Encoded packets (e.g. "connect") work well.

I wasn't able to decode the "other" gamepackets yet.. Is there any other encryption being used?

I tried it using a proxy because it seemed a lot easier to me :p