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Rogdush
Joined: 10 Feb 2006
Posts: 21
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 Posted: Sun Jan 20, 2008 9:20 am Post subject: New, enchanced 2D clients (about network protocol changes) |
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Ive began to investigate newer clients network changes, and it seems Ive got them all, just wanna to share, maybe someone will use it, or devs will have lil work with this info.
I had to change 6 packets to make it work.
0x3C - ContainerContent - add new grid location byte before parent serial.
0x25 - AddContainerItem - the same, grid location byte
0x08 - DropItem - grid location byte again, before container serial
0x77, 0x78, 0x20 - this one was odd, POL sends status/mobile flag equals to 0x01 when player is in warmode, where it should send 0x40. Older clients dont mind 0x01 value apparenty, but newer dont accept it as warmode flag and additionally freezes character when 0x01 bit is send in any of those packets in status flag.
There is one more problem with 6.0.5.0 client and its not fixable with packet hooks.
First message that client sends was 4 byte seed, now it sends normal packet with 0xEF id, 21 static length, containing seed at GetInt32(1) and client version number coded into 16 last bytes, 4 bytes on each version number.
It is send on first login only, after server select client sends normal 4 byte seed as usual. Seems nice, isnt it ? POL can get clientVersion before character select.
Packet 0xEF build:
BYTE[1] cmd
BYTE[4] seed
BYTE[4] client major version
BYTE[4] client minor version
BYTE[4] client revision version
BYTE[4] client prototype version
Im attaching packet hooks for all network changes Ive noticed in newer clients, 6.0.1.10 and couple above will work fine, but for 6.0.5.0 support we need new pol with ability of handling 0xEF packet 
Ops, I cant attach files here, Ill post it in code segments.
uopacket.cfg:
| Code: |
Packet 0x3C
{
Length variable
SendFunction update:ContainerContent
}
Packet 0x25
{
Length 21
SendFunction update:AddContainerItem
}
Packet 0x08
{
Length 15
ReceiveFunction update:DropItem
}
Packet 0x77
{
Length 0x11
SendFunction update:UpdatePlayer
}
Packet 0x78
{
Length variable
SendFunction update:UpdateEquipped
}
Packet 0x20
{
Length 0x13
SendFunction update:DrawPlayer
}
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update.src:
| Code: |
//--------------------------------------------------------------------------------
use uo;
//--------------------------------------------------------------------------------
program UOKRPackets()
print("[0x3C]: UO:KR Fix: ContainerContent");
print("[0x25]: UO:KR Fix: AddContainerItem");
print("[0x08]: UO:KR Fix: UpdatePlayer");
print("[0x77]: UO:KR Fix: UpdateEquipped");
print("[0x78]: UO:KR Fix: DropItem");
print("[0x20]: UO:KR Fix: DrawPlayer");
return 1;
endprogram
//--------------------------------------------------------------------------------
const ITEMS_OFFSET := 5;
const BLOCK_LEN := 19;
const KR_BLOCK_LEN := 20;
//--------------------------------------------------------------------------------
exported function ContainerContent(who, byref newPacket)
var Packet := newPacket;
var Items := array;
var Count := Packet.GetInt16(3);
var i, Item, oOffset, nOffset;
for(i:=0; i<Count; i+=1)
Item := struct;
oOffset := ITEMS_OFFSET+i*BLOCK_LEN;
nOffset := ITEMS_OFFSET+i*KR_BLOCK_LEN;
Item.+serial := Packet.GetInt32(oOffset);
Item.+model := Packet.GetInt16(oOffset+4);
Item.+amount := Packet.GetInt16(oOffset+7);
Item.+x := Packet.GetInt16(oOffset+9);
Item.+y := Packet.GetInt16(oOffset+11);
Item.+parent := Packet.GetInt32(oOffset+13);
Item.+color := Packet.GetInt16(oOffset+17);
newPacket.SetInt32(nOffset, Item.serial);
newPacket.SetInt16(nOffset+4, Item.model);
newPacket.SetInt8(nOffset+6, 0);
newPacket.SetInt16(nOffset+7, Item.amount);
newPacket.SetInt16(nOffset+9, Item.x);
newPacket.SetInt16(nOffset+11, Item.y);
newPacket.SetInt8(nOffset+13, 0);
newPacket.SetInt32(nOffset+14, Item.parent);
newPacket.SetInt16(nOffset+18, Item.color);
endfor
return 0;
endfunction
//--------------------------------------------------------------------------------
exported function AddContainerItem(who, byref Packet)
var parent := Packet.GetInt32(14);
var color := Packet.GetInt16(18);
Packet.SetInt8(14, 0);
Packet.SetInt32(15, parent);
Packet.SetInt16(19, color);
return 0;
endfunction
//--------------------------------------------------------------------------------
exported function DropItem(who, byref Packet)
Packet.SetInt32(10, Packet.GetInt32(11));
Packet.SetInt8(14, 0);
return 0;
endfunction
//--------------------------------------------------------------------------------
function VerifyStatus(byref Status)
if(Status & 0x01)
Status := Status - 0x01;
Status := Status | 0x40;
endif
endfunction
//--------------------------------------------------------------------------------
exported function UpdatePlayer(who, byref Packet)
var Status := Packet.GetInt8(15);
VerifyStatus(Status);
Packet.SetInt8(15, Status);
return 0;
endfunction
//--------------------------------------------------------------------------------
exported function UpdateEquipped(who, byref Packet)
var Status := Packet.GetInt8(17);
VerifyStatus(Status);
Packet.SetInt8(17, Status);
return 0;
endfunction
//--------------------------------------------------------------------------------
exported function DrawPlayer(who, byref Packet)
var Status := Packet.GetInt8(10);
VerifyStatus(Status);
Packet.SetInt8(10, Status);
return 0;
endfunction
//--------------------------------------------------------------------------------
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