[Austin]

I would like to write a plugin that allows CTs to drop a hostage they are carrying.

I am competent at writing plugins but have no idea how to start on this one.

[Bacardi]

I tough csgo game have already some kind hostage drop command...

I tried using SDKCall to execute DropHostage() function, but it always crash server.
Maybe source code what I am lookin is little old than what game use now or I'm doing something wrong.

But here is "fake" DropHostage(). It not work perfectly but it's something to play.
- You will get some errors, crash or bugs with this.

Command: sm_test2

[Bacardi]

Sorry second post.

I got void CHostage::DropHostage( Vector vecPosition, bool bIsRescued ) work with signature.
- Fix was to get memory address with signature, using gamedata file.
- I have only tested on Windows. Linux signature is included tough.

I also added DHooks detour, if someone want follow when DropHostage() happens.

Again, command is sm_test2
- Small tracehull check added, can you drop in front of you. Not perfect.
- Hostage would not appear after drop if hostage stuck inside something solid.

[FroGeX]

Just call on player fake death event....

[Austin]

Bacardi,
I haven't used sigs yet but need to learn them!

1) Do I put the test.games.txt file into this folder?
..\sourcemod\gamedata

Do I keep this exact name?
test.games.txt


2) I got dhooks.inc from here. Is this the correct one to use?
https://www.sourcemod.net/new-api/dhooks/__raw

but I get this on compile

test.sp(11) : error 105: cannot find method or property GameData.GetMemSig
test.sp(11) : warning 213: tag mismatch

[Austin]

Originally Posted by FroGeX Just call on player fake death event....

Can you give an example how to to do this?

tx

[Bacardi]

About GetMemSig error, what version SM you are running?

sm version


*edit
I have use SourcePawn compiler: SourcePawn Compiler 1.11.0.6913

[Austin]

Originally Posted by Bacardi About GetMemSig error, what version SM you are running? sm version *edit I have use SourcePawn compiler: SourcePawn Compiler 1.11.0.6913

I had to update SM in my build environment AND on the server.

It works!

Bacardi == "Genius" ? "Yes!" : "Probably.."


I made a slight change.

PHP Code:

    if(!didhit)
        SDKCall(DropHostage, m_hCarriedHostage, endpos, false);
    else
        PrintCenterText(client,"Can not drop hostage here.\nMove to where you have more free space in front of you."); 


And this is a great example to help get me started on sigs.......

Can you point me to the best intro on sigs, on what I would have to do to find this sig after some valve updates breaks it?

Thank you!

[Bacardi]

Originally Posted by Austin ... Can you point me to the best intro on sigs, on what I would have to do to find this sig after some valve updates breaks it? Thank you!

I don't know how much you have "disassembler" server *.dll file or *.so file

Easiest way is, ask in this forum.

Hard way is setup your PC with The Interactive Disassembler (IDA) program, (I use old version).
Then you need lot of hard disk space, IDA is creating 200~300MB database from server-libary file.
-You want also download SRCDS and use that as sandbox for all testing. Not public server.

It is require to have PC with good CPU with many cores. (When disassembly, IDA is using 6 threads)

Looking for offsets:
Sticky: [IDA/DHooks]How to get vtable offsets

Here look signature between Linux and Windows:
https://youtu.be/xUOU2bU6EF0

Another signature thingy:
https://youtu.be/SD6Rn2D7IGo


*edit
For finding CSGO drophostage signature (server.dll, server.so):
Look for these two strings

PHP Code:

aStopfollowing  db 'StopFollowing',0    ; DATA XREF: sub_105485F0+23E↑o
 aSISS0f0f0fDrop db '"%s<%i><%s><%s>" [%.0f %.0f %.0f] dropped off a hostage',0Ah,0 


[Austin]

Originally Posted by Bacardi Easiest way is, ask in this forum.

Bacardi, EXACTLY what I was asking for!!!

I prefer to learn how to do everything myself because
it is fun to learn and
I have many more things I want to do that are related as far as using the same programming techniques.

I run bot servers and what I would really like to do is
FINALLY create a sourcemod "sdktools" for bot functions!

I have used IDA before (an also got an A in my college x86 class ;-) and have set up many srcs servers.

My "desktop" PC is a server motherboard with old now but still great,
Xeon 3.6 GHZ 6 physical cores.
2x 1080Ti
64 GB memory.....
1T nvme.

Again thanks for the links....

Last question and only still a mystery.....

HOW did you know to look for these strings to find the offsets?
I already knew looking for strings was a way to find offsets, but how did you know to look for THESE strings?

By looking at strings in the binaries, or by looking at
source source?