lpatcher http redirect for cod4 and rest of cods

DPGmaximus · **Joined:** 28 Sep 2009 21:30 **Posts:** 39

By default if you don't host from a http:// redirect in CoD4 or any of the CoD series of games the max upload speed would be 20k. I wonder if there is a way to overide this instead of redirecting people to a website to download the mods or maps? I know the upload speed of my server box located in a datacenter is wayyyyyyyyyyy faster than our website's upload speed.

Anyhow, just thought I would ask if this would be possible. Thanks again for your help with making the code for the mods filter with use with the lpatcher aLuigi! :)

aluigi · **Posted:** 18 Feb 2011 17:28

isn't sv_maxRate the cvar that handles the maximum speed of the downloads?

DPGmaximus · **Joined:** 28 Sep 2009 21:30 **Posts:** 39

sv_maxRate controls rate of data exchange between server and player however, it doesn't effect download speeds.

aluigi · **Posted:** 19 Feb 2011 13:03

sv_maxrate handles also the in-game downloads because the quake 3 engine considers them as part of the in-game connection, you can see that in the source code at line 857 of sv_client.c in quake3-1.32b.

indeed the same code exists also in cod4:

Code:

0052C2C6  |> 8B0D 68C48501     MOV ECX,DWORD PTR DS:[185C468]           ;  iw3mp.0CBB41C8
0052C2CC  |. 8B41 0C           MOV EAX,DWORD PTR DS:[ECX+C]
0052C2CF  |. 85C0              TEST EAX,EAX
0052C2D1  |. 8BBD F0040800     MOV EDI,DWORD PTR SS:[EBP+804F0]
0052C2D7  |. 74 26             JE SHORT iw3mp.0052C2FF
0052C2D9  |. 3D E8030000       CMP EAX,3E8
0052C2DE  |. 7D 16             JGE SHORT iw3mp.0052C2F6
0052C2E0  |. 6A 00             PUSH 0
0052C2E2  |. 51                PUSH ECX
0052C2E3  |. B9 E8030000       MOV ECX,3E8
0052C2E8  |. E8 13060400       CALL iw3mp.0056C900
0052C2ED  |. 8B0D 68C48501     MOV ECX,DWORD PTR DS:[185C468]           ;  iw3mp.0CBB41C8
0052C2F3  |. 83C4 08           ADD ESP,8
0052C2F6  |> 8B49 0C           MOV ECX,DWORD PTR DS:[ECX+C]
0052C2F9  |. 3BCF              CMP ECX,EDI
0052C2FB  |. 7D 02             JGE SHORT iw3mp.0052C2FF
0052C2FD  |. 8BF9              MOV EDI,ECX

so sv_maxrate is the easy way to boost the downloads, anyway it costed me nothing to make something to force a higher rate so the following is the usual patch for lpatch:

Code:

====================================================================================

TITLE
    Call of Duty 4 server in-game downloads booster
    by Luigi Auriemma

FILE
    *mp.exe

BYTES_ORIGINAL
    8B 0D ?? ?? ?? 01   ; MOV ECX,DWORD PTR DS:[185C468]
    8B 41 0C            ; MOV EAX,DWORD PTR DS:[ECX+C]
    85 C0               ; TEST EAX,EAX
    8B BD ?? ?? ?? 00   ; MOV EDI,DWORD PTR SS:[EBP+804F0]
    74 ??               ; JE SHORT iw3mp.0052C2FF
    3D E8 03 00 00      ; CMP EAX,3E8
    7D ??               ; JGE SHORT iw3mp.0052C2F6

BYTES_PATCH
    ?? ?? ?? ?? ?? ??   ; MOV ECX,DWORD PTR DS:[185C468]
    33 C0 90            ; XOR EAX,EAX + NOP
    ?? ??               ; TEST EAX,EAX
    BF DE C0 11 00      ; MOV EDI,iw3mp.00DEC0DE    // maxrate = 1163486
    90                  ; NOP                       // search 11 c0 de in the exe
                                                    // for modifying this value

====================================================================================

if it works (it must work) let me know what's the value you have chosen instead of 0x11c0de

DPGmaximus · **Joined:** 28 Sep 2009 21:30 **Posts:** 39

I will give it a shot here later today and let you know. Currently sv_maxrate is set to sv_maxrate 25000. I would imagine your patch would overide that setting or would I need to set that to sv_maxrate 1163486 after I apply your patch?

aluigi · **Posted:** 19 Feb 2011 17:45

when you apply it then sv_maxrate is no longer important.
anyway if you don't see effects you could also try to set sv_maxrate to that value as additional test.

DPGmaximus · **Joined:** 28 Sep 2009 21:30 **Posts:** 39

Alright I tested it out and its still only downloading at 20k max. So when I set sv_maxrate 1163486 it comes up with:

'1163486' is not a valid value for dvar 'sv_maxRate'
Domain is any integer from 0 to 25000

aluigi · **Posted:** 20 Feb 2011 20:51

just for curiosity:
what happens if you set big values (big but still in the limits of the game) in the cl_rate and cl_rate and cl_snaps on the client?

as visible in the source code the download speed is calculated on these 2 values

DPGmaximus · **Joined:** 28 Sep 2009 21:30 **Posts:** 39

The command for rate for a client is:

rate

and snaps for a client is:

snaps

The highest you can set the rate to is 25000 and the highest you can set snaps to is 30. For example I have my config set to:

/snaps 30

/cl_maxpackets 100

This gives me better registration and actually drops my in game ping up to 10 less than default.

Anyhow, I appreciate your efforts with this aLuigi. What I am going to do is just host a website off of our server box and go that route.