DDraceNetwork - developer

DDraceNetwork

Development / developer

Development discussion. Logged to https://ddnet.org/irclogs/ Connected with DDNet's IRC channel, Matrix room and GitHub repositories — IRC: #ddnet on Quakenet | Matrix: #ddnet-developer:matrix.org GitHub: https://github.com/ddnet

Between 2024-07-28 00:00 and 2024-07-29 00:00

<ChillerDragon> ryo "linkit" is a cool name!

<ChillerDragon> How do I correctly fill a integer from a 4 byte memory region into a 64 bit register?

02:28

<ChillerDragon> In my .bss section i have udp_payload_index resb 4 and now i want to move its value into rax but rax is 8 byte.

02:29

<ChillerDragon> So this is reading out of bounds if i understood it correctly mov rax, [udp_payload_index]

02:29

<ChillerDragon> the register name determins the size so its reading 8 bytes starting at my udp_payload_index label which is only a 4 byte region

02:30

<ChillerDragon> mov edx, [udp_payload_index] should do a 4 byte move but then only half of rax is set and there might be other garbage in the other half

02:31

<ChillerDragon> So i did a xor rax, rax first hoping it would all just work. Does that make sense? Or did i miss something?

<ChillerDragon> I just had an interesting denial of service idea for the 0.7 protocol to basically ban one player quite efficiently. Can I post it here? xd

02:47

<ChillerDragon> Ah nvm it doesnt work so i can share the idea

02:48

<ChillerDragon> So the security tokens are used to make sure I can not impersonate another ip and act on their behalf because i never get back the reponse with the token from the server.

02:49

<ChillerDragon> My idea was to spoof the connect message to generate a token which i do not get but thats fine. If now the real owner of the ip tries to connect they will be rejected because the token is wrong.

02:49

<ChillerDragon> But it does not work. You need to send ctrl_msg_connect for the server to drop invalid tokens which depends on the server token.

[ddnet/ddnet] Pull request opened: #8660 Update spanish.txt

Checklist

[ ] Tested the change ingame
[ ] Provided screenshots if it is a visual change
[ ] Tested in combination with possibly related configuration options
[ ] Written a unit test (especially base/) or added coverage to integration test
[ ] Considered possible null pointers and out of bounds array indexing
[ ] Changed no physics that affect existing maps
[ ] Tested the change with [ASan+UBSan or valgrind's memcheck](https://github.com/ddnet/ddnet/#using-ad...

04:30

[ddnet-maps:master] 1 new commit

f258cb2 A Cliff Charge - ddnet-maps

yikes, there's no movzx instruction with 32 bit source

Wat even movzx do?

mov zero extend, it takes value and moves it into bigger place

06:32

mov rax, byte [label] moves 1 byte from label into rax

06:32

probably*

Filling the rest of rax with zeros?

yep

Epic that’s what I need

but it doesnt exist for 32 bit xd

Do you think my xor hack works as well?

06:33

Im scared about endianess and stuff

never heard of her

endianness!

i mean i heard of it but never had problems with it xd

nessendian!

06:35

Okay I will use that from now on everywhere

movzx? (edited)

no xor rax and mov eax

ah xd

06:36

ye, i think it's the only way to make it work for 32 bit value thonk

thonk

Since you said it can’t fail it’s not gonna add bugs

06:36

Compiler dev approved

better not trust my words justatest

justatest

Too late

<ChillerDragon> i have the feeling 64 bit is like ipv6

08:24

<ChillerDragon> nobody actually uses it

maybe more like ipv6 devided by 2 ._.

<ChillerDragon> feels like every push and pop is bloating around 64 bits while cmp only checks 32 or all my C bros use int32 in their apis

08:29

<ChillerDragon> @jxsl13 you would love what im working on right now

08:29

<ChillerDragon> selfrolling my testing framework in assembly

urgh

08:29

too low level for mein geschmack.

<ChillerDragon> average go enjoyer

classic

08:30

static linking enjoyer

<ChillerDragon> i dont link shit

08:30

<ChillerDragon> libc is bloat

libc is bloat

<ChillerDragon> cleaner than go lang test code

08:45

<ChillerDragon> change my mind

08:45

<ChillerDragon> https://zillyhuhn.com/cs/.1722156277.png

Embedded image

08:45

<ChillerDragon> assembly with macros is a underrated simple language

MilkeeyCat

yikes, there's no movzx instruction with 32 bit source

There is no movzx for 32 bit source because it would make no sense to have one

08:59

In x86-64, 32bit operands by definition create a 32 bit result zero extended to 64 bits

ws-client

<ChillerDragon> https://zillyhuhn.com/cs/.1722156277.png

cannot deny

Learath2

There is no movzx for 32 bit source because it would make no sense to have one

it would make sense to me, so i can write movzx rax, dword ptr [foo] kek

kek

MilkeeyCat

it would make sense to me, so i can write movzx rax, dword ptr [foo] kek

kek

Just use mov instead

Learath2

Just use mov instead

but what if there's some data in upper 32 bits of a register

MilkeeyCat

but what if there's some data in upper 32 bits of a register

It's discarded, as I said, 32 bit operands create 32 bit results zero extended to 64 bits

09:25

https://www.intel.com/content/dam/www/public/us/en/documents/manuals/64-ia-32-architectures-software-developer-vol-1-manual.pdf 3.4.1.1

09:28

mov eax, dword ptr [foo]

and in rax there won't be garbage value, right?

Yes, the upper half will get zero'd

chilllerdragon: you can remove that xor xd

<ChillerDragon> woah no xor?

09:36

<ChillerDragon> just mov eax, 0xBABE and im good? the entire rax register only contains babe? thats op

register wont contain garbage if you move into eax 32 bit operand

<ChillerDragon> so you basically can't shoot your self i the foot with assembly

09:37

<ChillerDragon> easier than pyson

if you want just a number you can just write mov rax, 0xBABE, can't you? thonk

thonk

<ChillerDragon> i read from some label

09:38

<ChillerDragon> thats a 4 byte region

ye, so it will work

<ChillerDragon> i might ditch bash as my fav language

also you don't need xors before movzx as here https://github.com/ChillerDragon/teeworlds-asmr/blob/b52f44e3a94e7af03341b18fa85ccde329ed02cd/src/udp.asm#L78-L79

<ChillerDragon> basically grep xor &>/dev/null

09:40

<ChillerDragon> its cring anyways why not mov 0

09:42

<ChillerDragon> i fixed quitting btw xd

09:42

<ChillerDragon> no more pkill

09:42

<ChillerDragon> better quit support than vim

MilkeeyCat

also you don't need xors before movzx as here https://github.com/ChillerDragon/teeworlds-asmr/blob/b52f44e3a94e7af03341b18fa85ccde329ed02cd/src/udp.asm#L78-L79

No, only 32 bit operands have this behaviour, it's for legacy reasons

<ChillerDragon> aaaaaaaaaaaaaaaa

09:46

<ChillerDragon> i removed it all xd

Oh actually wait, I didn't look at it

09:46

It's fine, you don't need the xor

<ChillerDragon> it still works

09:47

<ChillerDragon> but that doesnt mean much does it

Yeah yeah, it's fine. I misunderstood what catperson said. I thought he meant those can also be mov

im not a furry justatest

justatest

<ChillerDragon> so either mov on edi or movzx byte on rdi?

09:48

<ChillerDragon> eh well different sizes trol

Chiller when code directly in bytecode?

<ChillerDragon> once i spawned a tee with assembly

09:50

<ChillerDragon> but then i also gotta learn elf format and shits

09:50

<ChillerDragon> its gonna be much harder

chillerdragon: when vulkan support?

<ChillerDragon> and offsets

09:50

<ChillerDragon> i leave vulkan to jopsti and lerato

09:50

<ChillerDragon> they already pro in it

There was this weird dude in an irc channel that I used to be in that made a really interesting machine code writing tool. Then he turned out to be a massive racist transphobe so he got exiled. Now I can't find the tool and my irclogs aren't complete from those days

justatest

1

<ChillerDragon> racist byte ode

09:51

<ChillerDragon> code

09:51

<ChillerDragon> justatest

justatest

the double edginess of a sword

[ddnet/ddnet] Pull request opened: #8661 Workaround GLEW error code on init with Wayland

What is the motivation for the changes of this pull request? The way I understand it, vanilla GLEW comes into two flavors defined at build time, one has support for GLX extensions and the other ones supports EGL extensions. If GLEW GLX is linked into DDNet, and SDL2 is using the wayland video driver, glewInit() will return the GLEW_ERROR_NO_GLX_DISPLAY error code and we bail out. Among the first things glewInit() does is to call glewContextInit() and only after that call ...

всем привет

yeah

10:52

#off-topic

<ChillerDragon> https://zillyhuhn.com/cs/.1722169010.png

Embedded image

12:17

<ChillerDragon> here we go again

12:17

<ChillerDragon> @влад helo

ws-client

<ChillerDragon> https://zillyhuhn.com/cs/.1722169010.png

kek

ws-client

<ChillerDragon> https://zillyhuhn.com/cs/.1722169010.png

most likely cosmic ray

github-merge-queue[bot]

[ddnet:master] 2 new commits

38773e3 Update spanish.txt - n0Ketchp a898604 Merge pull request #8660 from n0Ketchp/patch-20 - def-

12:41

[ddnet/ddnet] Pull request closed: #8660 Update spanish.txt

ws-client

<ChillerDragon> https://zillyhuhn.com/cs/.1722169010.png

time to test your testing framework

12:52

with another testing framework

12:53

kek

<ChillerDragon> yes it was totally cosmic ray! and no bug in my testing framework xd

12:59

<ChillerDragon> that sounds like dangerous recursion @jxsl13 !

kek

1

ws-client

<ChillerDragon> https://zillyhuhn.com/cs/.1722169010.png

lgtm

have anyone had such problems with docker

Post "https://auth.docker.io/token": dial tcp: lookup auth.docker.io on 192.168.0.1:53: read udp 192.168.0.101:51560->192.168.0.1:53: i/o timeout

feelsbadman

any ideas how to fix

dns server dead in your local network?

14:30

router's dns dead?

14:30

pihole down?

<ChillerDragon> which command are you running? docker push? or why does it try to auth?

14:38

<ChillerDragon> have you tried using podman? :p

jxsl13

pihole down?

I like your funny words magic man

1

ws-client

<ChillerDragon> which command are you running? docker push? or why does it try to auth?

docker pull xd

have you tried turning it off and on again?

14:47

dns lookup fails

turning off wat

router, your local dns server

14:47

whatever you have in your network

14:47

or on your pc/laptop

i have a solution, execute same command 50 times and it will succeed once

nslookup docker.io

14:48

or

14:48

nslookup auth.docker.io

jxsl13

nslookup auth.docker.io

Image attachment

are you in some weird vpn?

no -.-

nslookup auth.docker.io

Image attachment

https://stackoverflow.com/questions/44761246/temporary-failure-in-name-resolution-errno-3-with-docker

Temporary failure in name resolution [Errno -3] with Docker

I'm following the docker tutorial and am on the part where I have to build the app using: docker build -t friendlyhello . It reaches up to step 4, where after a pause I get this error: Step 4/7 ...

14:51

Image attachment

14:53

might tell docker to use some specific dns server

@Jupstar ✪ Hi, please give me a discord forgottencat I want to talk to him

jxsl13

might tell docker to use some specific dns server

i uncommented default ones i had in the file and nothing changed xd

what are the default ones and what is the error message

тютюн

@Jupstar ✪ Hi, please give me a discord forgottencat I want to talk to him

he is on this discord

did the dns server ips in the error message change at all?

failed to solve: node:18: failed to resolve source metadata for docker.io/library/node:18: failed to do request: Head "https://registry-1.docker.io/v2/library/node/manifests/18": dial tcp [2600:1f18:2148:bc01:20a3:9c3e:d4a7:9fb]:443: connect: network is unreachable

14:58

is this better? xd

jxsl13

what are the default ones and what is the error message

8.8.8.8 & 8.8.4.4

your ipv6 is probably not working

how can i not use ipv6 then? xd

feelsbadman

1

15:00

i need good ol' ipv4

feelsbadman

1

Jupstar ✪

he is on this discord

How can I talk to a forgottencat?

after 20 times it worked, yey

feelsbadman

2

тютюн

How can I talk to a forgottencat?

go to #general and talk to <@1227173549949845527>

thanks

@jxsl13 thanks for linking da page, even tho i still get these errors sometimes it works much better! xd

xD np

15:17

tried my best

15:17

but networking is far from my strong point

can anyone show your output of nslookup google.com pls owo

owo

MilkeeyCat

can anyone show your output of nslookup google.com pls owo

owo

Image attachment

i think i know how i fix my ass connection poggers2

poggers2

15:58

i was wondering why when i connected to work vpn in ddnet list of servers always loads instantly

15:58

but when im not connected it takes forever

15:59

and i just checked, it uses different dns server, maybe that's the problem

yup, now it loads blazingly fast

I spent 1 hour today not implementing a 64-ary trie. Just mentally got stuck randomly

16:15

I still can't decide how to make it, random total mental block

MilkeeyCat

yup, now it loads blazingly fast

and it fixed docker as well

Maybe I'll make a 256-ary trie instead, hm

16:18

but it's probably worse on cache

MilkeeyCat

and it fixed docker as well

what you do

16:30

share the knowledge

jxsl13

what you do

changed dns ip in /etc/resolv.conf xd

:0 to google ip?

i chose cloudflare

ok

16:31

good to know

16:31

thanks

[ddnet/ddnet-web] Pull request opened: #297 Add missing BHR server flag

Hello guys, I have a question. Im new to the ddrace project and I want to add my own component. So I created my own folder called features (game/client/features) I created a class, which extends the CComponent class. Now I want to override the OnRender class. I've also overridden the Sizeof method with a return of sizeof(*this). So now I have to register the component. I did this in the gameclient.h by adding this: // all components CTestComponent m_TestComponent; Then I added it to the insert call in the gameclient.cpp: m_vpAll.insert(m_vpAll.end(), {&m_Skins, &m_CountryFlags, &m_MapImages, &m_Effects, // doesn't render anything, just updates effects &m_Binds, &m_Binds.m_SpecialBinds, &m_TestComponent, <------- Unfortunately I get the error, that m_TestComponent is an unknown overwrite specifier. The error leads to the gameclient.h, where I put CTestComponent m_TestComponent; Can anybody help me with this?

is CTestcomponent correctly declared to extend CComponent?

17:10

eg class CTestComponent : public CComponent

Trexic

Hello guys, I have a question. Im new to the ddrace project and I want to add my own component. So I created my own folder called features (game/client/features) I created a class, which extends the CComponent class. Now I want to override the OnRender class. I've also overridden the Sizeof method with a return of sizeof(*this). So now I have to register the component. I did this in the gameclient.h by adding this: // all components CTestComponent m_TestComponent; Then I added it to the insert call in the gameclient.cpp: m_vpAll.insert(m_vpAll.end(), {&m_Skins, &m_CountryFlags, &m_MapImages, &m_Effects, // doesn't render anything, just updates effects &m_Binds, &m_Binds.m_SpecialBinds, &m_TestComponent, <------- Unfortunately I get the error, that m_TestComponent is an unknown overwrite specifier. The error leads to the gameclient.h, where I put CTestComponent m_TestComponent; Can anybody help me with this?

only ask in 1 channel

17:10

delete one msg

As I said, idk where that belongs to... sry

Trexic

As I said, idk where that belongs to... sry

np, here in dev it fits quite well i'd say

17:12

questions is more for beginners

1

meloƞ

eg class CTestComponent : public CComponent

Yes its is: class CTestComponent : public CComponent { public: virtual int Sizeof() const override { return sizeof(*this); } virtual void OnRender() override; };

[ddnet/ddnet] Pull request opened: #8662 Add required attributes to Android manifest

Fix incorrect default value for Vulkan, which is not required.

Checklist

[ ] Tested the change ingame
[ ] Provided screenshots if it is a visual change
[ ] Tested in combination with possibly related configuration options
[ ] Written a unit test (especially base/) or added coverage to integration test
[ ] Considered possible null pointers and out of bounds array indexing
[ ] Changed no physics that affect existing maps
[ ] Tested the change with [ASan+UBSan or val...

Trexic

Yes its is: class CTestComponent : public CComponent { public: virtual int Sizeof() const override { return sizeof(*this); } virtual void OnRender() override; };

did you define OnRender somewhere?

18:09

can you provide the exact error? (just copy logs) (edited)

Im sorry, I was just about to tell you that I have found the issue

I was including the gameclient.h in the testcomponent.h and that caused the issue

github-merge-queue[bot]

[ddnet:master] 2 new commits

0983e81 Add required attributes to Android manifest - Robyt3 26b9d16 Merge pull request #8662 from Robyt3/Android-Manifest-Required-Attribute - Jupeyy

18:14

[ddnet/ddnet] Pull request closed: #8662 Add required attributes to Android manifest

[ddnet/ddnet] Pull request opened: #8663 Smoother menu checker background scrolling on loading screens, fix menu checker background on wide resolutions and optimize it

Update global time also while rendering loading screens and shift the menu checker background based on the global time so it's smoother while loading. The maximum width and height were swapped as the loop bounds, so the menu checker background did not have the correct width on very wide resolutions. This was not noticed on common resolutions because twice as many quads as necessary were also being rendered for each row of the background. The bounds of the inner loop are adjusted and onl...

roby the machine

MilkeeyCat

changed dns ip in /etc/resolv.conf xd

i actually had to change settings in router because /etc/resolv.conf was overwritten by dhcpcd service :\

you can also stop the dhcpcd from doing that

i didn't find how to do that so i changed in router

how are jump and other particles packed into demos?

as snapshot items

an explosion is CNetEvent_Explosion for example but what would a jump be?

heinrich5991

as snapshot items

i cant find the correct struct

maybe as an event on the character

21:00

don't quite remember

~~there is CNetEvent_Common but it defined as~~

struct CNetEvent_Common
{
    static constexpr int ms_MsgId = NETEVENTTYPE_COMMON;
    int m_X;
    int m_Y;
};

(edited)

21:01

~~no idea how i would use that~~ (edited)

21:01

ah nvm

21:02

thats just the parent of all the other ones

heinrich5991

maybe as an event on the character

if you don't have infinite jumps everything works fine but as soon as you get infinite jumps the sounds and jump particles disappear (edited)

21:07

maybe the physics code is just playing with me and its not correctly implemented

ok

21:20

that is literally the default demo behaviour

21:20

if you have endless jumps it doesn't give sounds nor particles

21:20

thats so stupid

what are you trying to do?

im making a new TAS video and im rendering the run directly to a demo. Since the tas includes infinite jump you can't really witness the absurd amount of jumps the tas makes since it endless jumps apparently are not visualized in the demo player. (edited)

21:23

no problem tho i can fix it

okay seems like all endless jumps are handled as ground jumps thats why they don't have particles or sounds in demos

21:33

the sounds for ground jumping are sent manually from the server only if you don't have endless jumps (edited)

just increasing m_Jumpled on the player core by one before putting it into the demo works fine.

[ddnet-web:master] 1 new commit

b54e908 -StormAx -> Storma - def-

22:08

[ddnet/ddnet-web] Pull request closed: #297 Add missing BHR server flag

22:08

[ddnet-web:master] 2 new commits

9807829 Add BHR server flag - furo321 a799009 Merge pull request #297 from furo321/missing-bahrain-flag - def-

[ddnet-web:master] 1 new commit

86187f0 Storma -> StormA - def-

github-merge-queue[bot]

[ddnet:master] 3 new commits

23fb01f Smoother menu checker background scrolling on loading screens - Robyt3 5bd0b06 Fix menu checker background on wide resolutions and optimize it - Robyt3 83c9b6c Merge pull request #8663 from Robyt3/Menus-Checker-Fix-Optimization - def-

22:37

[ddnet/ddnet] Pull request closed: #8663 Smoother menu checker background scrolling on loading screens, fix menu checker background on wide resolutions and optimize it

Exported 239 message(s)

Timezone: UTC+0