Any interest in this?

[IzNoGoD]

Hey guys,

I managed to reduce the footprint of the cod2 server files to a whopping 325 meg, using some dirty, dirty libcod tricks.

Anyone interested in this?

[IzNoGoD]

Just to clarify: this modification works with sv_pure 1 as well, clients wont need to download anything

[voron00]

10char

[IzNoGoD]

Firstly, add this to your libcod.cpp:

		
cHook *hook_fs_restart;

int fs_restart(int a1)
{
    a1 = 1337;
    *(int*)0x844020C = 1337;
    hook_fs_restart->unhook();
    int (*sig)(int a1);
    *(int *)&sig = hook_fs_restart->from;
    int ret = sig(a1);
    hook_fs_restart->hook();
    for(int* i = *(int**)0x849FD68; i != NULL; i = *(int**)i)
    {
        if(*(char**)(i+1))
        {
            if(!strncmp((char*)(*((int *)i + 1) + 512), "main", 4))
            {
                char* iwdname = (char*)(*((int *)i + 1) + 256);
                int* checksum = (int*)(*((int *)i + 1) + 772);
                int* checksump = (int*)(*((int *)i + 1) + 776);
                if(!strncmp(iwdname, "iw_00", 5))
                    *checksum = 178615151;
                else if(!strncmp(iwdname, "iw_03", 5))
                    *checksum = 1659111092;
                else if(!strncmp(iwdname, "iw_04", 5))
                    *checksum = -1652414412;
                else if(!strncmp(iwdname, "iw_05", 5))
                    *checksum = 1842349204;
                else if(!strncmp(iwdname, "iw_06", 5))
                    *checksum = 1053665859;
                else if(!strncmp(iwdname, "iw_07", 5))
                    *checksum = 1046874969;
                else if(!strncmp(iwdname, "iw_08", 5))
                    *checksum = 1101180720;
                else if(!strncmp(iwdname, "iw_09", 5))
                    *checksum = -621896007;
                else if(!strncmp(iwdname, "iw_10", 5))
                    *checksum = 1334775335;
                else if(!strncmp(iwdname, "iw_11", 5))
                    *checksum = -1980843666;
                else if(!strncmp(iwdname, "iw_12", 5))
                    *checksum = -1333623355;
                else if(!strncmp(iwdname, "iw_13", 5))
                    *checksum = 780394069;
                else if(!strncmp(iwdname, "iw_14", 5))
                    *checksum = -1449716526;
                else if(!strncmp(iwdname, "iw_15", 5))
                    *checksum = 181429573;
                if(!strncmp(iwdname, "iw_00", 5))
                    *checksump = -611799356;
                else if(!strncmp(iwdname, "iw_03", 5))
                    *checksump = -2036896789;
                else if(!strncmp(iwdname, "iw_04", 5))
                    *checksump = -1238585410;
                else if(!strncmp(iwdname, "iw_05", 5))
                    *checksump = 456204364;
                else if(!strncmp(iwdname, "iw_06", 5))
                    *checksump = -1435860022;
                else if(!strncmp(iwdname, "iw_07", 5))
                    *checksump = 508398181;
                else if(!strncmp(iwdname, "iw_08", 5))
                    *checksump = -125161610;
                else if(!strncmp(iwdname, "iw_09", 5))
                    *checksump = -1575356890;
                else if(!strncmp(iwdname, "iw_10", 5))
                    *checksump = -1120125128;
                else if(!strncmp(iwdname, "iw_11", 5))
                    *checksump = 1355810507;
                else if(!strncmp(iwdname, "iw_12", 5))
                    *checksump = 1210336806;
                else if(!strncmp(iwdname, "iw_13", 5))
                    *checksump = -1718123365;
                else if(!strncmp(iwdname, "iw_14", 5))
                    *checksump = -2049617909;
                else if(!strncmp(iwdname, "iw_15", 5))
                    *checksump = -914322415;
            }
        }
    }
    return ret;
} 
	

And this on the proper spot:

		            hook_fs_restart = new cHook(0x80A337A, (int) fs_restart);
            hook_fs_restart->hook(); 
	

Then, extract all your iwds (excluding the localized_english ones and iw_01 and iw_02, which contain sp maps only anyway). Extract them all to a different folder (extract iw_00 to a folder named iw_00 etc)
Then, run this python3 script from the root of that folder:

		import os

startdir = os.getcwd()

for subdir in os.listdir(startdir):
    iwddir = os.path.join(startdir, subdir)
    for src_dir, dirs, files in os.walk(iwddir):
        for file in files:
            if(file.endswith(".iwi") or file.endswith(".mp3") or file.endswith(".wav") or file.endswith(".dds") or file.endswith(".d3dprt") or file.endswith(".hlsl") or file.endswith(".tga") or file.endswith(".jpg") or file.endswith(".rmb") or file.endswith(".roq") or file.endswith(".spd") or file.endswith(".tech") or file.endswith(".techset") or file.endswith(".tmp") or file.endswith(".tga0")):
                os.remove(os.path.join(src_dir, file))
                open(os.path.join(src_dir, file), 'a').close() 
	

Then manually remove the sp maps from your folders (iw_00 and iw_03 contain some)

Then, run this .bat script from the root of your extraction folder:

		for /D %%d in (*.*) do "C:\program files\7-zip\7z.exe" a -tzip "%%d.iwd" ".\%%d\*" 
	

This should give you the iwds required. Then, extract all localized_english iwds into a single folder and delete everything except for the localizedstrings folder. Pack this folder into localized_english_iw99.iwd.

Now your iwds are ready.



Few things to note:
- To make sv_pure 1 work I had to un-randomize the checksumfeed. This means your server will be a little less secure against malicious players trying to join with modified iwd files (the 1337 is replacing the checksumfeed)
- iw_15 has a different checksum in patch 1.2. For patch 1.2 either backtrace what i did or just keep the file unmodified. Remove the iw_15 lines from the libcod.cpp as well for 1.2
- As most people will be running their servers without modified iwds, i strongly suggest to either not merge this into the libcod code, or to let it be controlled by some cvar.
- If you have any problem with this code, you should just run your cod server unmodified.

[Ni3ls]

What is the improvement compared to regular server? Speed, traffic?

[IzNoGoD]

Just hdd usage.

[IzNoGoD]

Follow-up on this: it caused some issues with custom maps, giving clients a iwd mismatch error. Might investigate some time in the future.