server uses protocol version 68

subt13 · **Joined:** 14 Dec 2007 23:10 **Posts:** 6

Hi,

I'm writing a little program in c# that just connects to a quake 3 server and everything seems to work okay up until I send the connect packet.

To encode the connect packet I'm using q3huffdecenc.

Here is what the q3huffdecenc will encrypt:

Quote:

\challenge\1844132329\qport\59767\protocol\68\cl_guid\FEDC995C5B7B7B32734CEDA4E5F9D8C9\name\TEST\rate\25000\snaps\20\model\doom/blue\headmodel\doom/blue\team_model\doom/blue\team_headmodel\doom/blue\color1\1\color2\5\handicap\100\sex\male\cl_anonymous\0\cg_predictItems\1\cl_punkbuster\1\teamtask\0

(The challenge has come from getchallenge response)

Here is the encoded output (bear with me :) ):

Quote:

\challenge\??8`i??L????:??18{??D\??????>??????}o??????????P????????O\????????"??
??0??T??????%w????u??|??x)??????????0????}0??????????????[??a??m????<???Zu????>????????#??!??????lW????6a????Nt?????????????????????a????h????,????Z?????6??}~??W 37??{??????N??aO????x?????Un/6????1??????]???GSEm$??;[??.3??-X??l????????????e??F

Finally I tack on to the start of this

Quote:

???????? connect

So the finally result before I load it into a byte array is
???????? connect \challenge\??8`i??L????:??18{??D\??????>??????}o??????????P????????O\????????"??
??0??T??????%w????u??|??x)??????????0????}0??????????????[??a??m????<???Zu????>????????#??!??????lW????6a????Nt?????????????????????a????h????,????Z?????6??}~??W 37??{??????N??aO????x?????Un/6????1??????]???GSEm$??;[??.3??-X??l????????????e??F

The response from the server is "server uses protocol version 68."

I tried this on the latest version of quake3 (1.32c or something)
I also tried this against a random quake server on the net and got:
The server uses protocol version 66." I'm not sure if it is related...

In q3fill I noticed that for the version 68 error it is because the packet is not getting compressed (-c command line argument)

Any advice would be appreciated, if you need to see the source code I can attach it

Thanks,

sub.

aluigi · **Posted:** 25 Jan 2008 11:38

the error is in the usage of the huffman compression on the string and not on the packet, so instead of using it on \challenge\1844132329\q... use it on connect \challenge\1844132329\q...
I also suggest you to use the " char at the beginning and the end of the string: connect "\challenge\1844132329\q..."

subt13 · **Joined:** 14 Dec 2007 23:10 **Posts:** 6

Okay, I'm not sure if I follow entirely

Here is the exact string that will be encoded

Quote:

connect "challenge\201441968\qport\59767\protocol\68\cl_guid\FEDC995C5B7B7B32734CEDA4E5F9D8C9\name\TEST\rate\25000\snaps\20\model\doom/blue\headmodel\doom/blue\team_model\doom/blue\team_headmodel\doom/blue\color1\1\color2\5\handicap\100\sex\male\cl_anonymous\0\cg_predictItems\1\cl_punkbuster\0\teamtask\0\"

Is that how it should be or should it be this:

Quote:

????????connect "challenge\201441968\qport\59767\protocol\68\cl_guid\FEDC995C5B7B7B32734CEDA4E5F9D8C9\name\TEST\rate\25000\snaps\20\model\doom/blue\headmodel\doom/blue\team_model\doom/blue\team_headmodel\doom/blue\color1\1\color2\5\handicap\100\sex\male\cl_anonymous\0\cg_predictItems\1\cl_punkbuster\0\teamtask\0\"

or should it be:

Quote:

"challenge\201441968\qport\59767\protocol\68\cl_guid\FEDC995C5B7B7B32734CEDA4E5F9D8C9\name\TEST\rate\25000\snaps\20\model\doom/blue\headmodel\doom/blue\team_model\doom/blue\team_headmodel\doom/blue\color1\1\color2\5\handicap\100\sex\male\cl_anonymous\0\cg_predictItems\1\cl_punkbuster\0\teamtask\0\"

and then add ????????connect to the front of the string after it is encoded?

When I looked at the q3exdec.txt file that came with q3huffdecenc it looks like it is the second string I have posted here.

Note: I didn't calculate the guid I just used a hardcoded one the only dynamic part of the string is the challenge value

I've tried all three of the ones I've posted and I either get the 68 version error or the socket never receives a response from the server

Thanks,

sub

Gamall · **Posted:** 26 Jan 2008 15:03

I don't know if your problem comes from that but

Code:

????????connect "challenge\blah...

maybe it comes from that missing backslash in front of challenge: here is the beginning of the connect string I use in QCmd, which works against protocol 26 at least:

Code:

"\xff\xff\xff\xff" "connect \"\\challenge\\"

so if you try with

Code:

????????connect "\challenge\blahblah...

maybe it will work...

PS : are you sure you have a correct offset when compressing with huffman ? It's 12 for the whole string, normally: Huff_CompressPacket(buff, 12, len);

Hope this helps,
Gamall Wednesday Ida

aluigi · **Posted:** 26 Jan 2008 19:28

yes subt13 all the packet included the 0xff chars, I forgot to put them in my example in the post.
So, all the packet must be passed to the huffman compression function

Luigi Auriemma

server uses protocol version 68