Locating the Packet Distributor (All 2D clients + Pre-Alpha)
Posted: Mon Feb 21, 2011 1:34 pmThis is brilliant work.
I've tested these scripts with Demo, 5.0.8.3 and God client, works great. Thanks!
JoinUO Forums
A discussion forum for the Ultima Online freeshard community.
https://forums.uo98.org/
Locating the Packet Distributor (All 2D clients + Pre-Alpha)
Page 1 of 1
Posted: Mon Feb 21, 2011 1:34 pmRe: Locating the Packet Distributor (All 2D clients + Pre-Al
Posted: Mon Feb 21, 2011 5:13 pmRe: Locating the Packet Distributor (All 2D clients + Pre-Al
Posted: Sat Feb 26, 2011 6:36 pmThis is really useful. It is exactly what I've been needing. Thank you!
Re: Locating the Packet Distributor (All 2D clients + Pre-Al
Posted: Fri Feb 10, 2012 1:56 pmRe: Locating the Packet Distributor (All 2D clients + Pre-Al
Posted: Sat May 12, 2012 1:12 pmHere's a trick I found for finding the beginning of the packet handler function.
Just search for:
CMP BYTE PTR DS:[EAX],33
In hex that's : 803833
clients I've seen so far have that instruction and only have it once: near the beginning of the packet handler function.
EDIT: damn, not true for all clients. It's there, but not necessarily next to the main packet handling code. In some clients it's off on it's own in a separate function that gets called before the main packet handler. It's a special handler for packet 0x33...
Also note that in client 7.0.25.0, that location of the 0x33 handler is called from 5 different locations in code and is for handling special packets -before- the main packet handler. Something to keep in mind. This style code is in clients from the 4.x to 7.x range.
Just search for:
CMP BYTE PTR DS:[EAX],33
In hex that's : 803833
clients I've seen so far have that instruction and only have it once: near the beginning of the packet handler function.
EDIT: damn, not true for all clients. It's there, but not necessarily next to the main packet handling code. In some clients it's off on it's own in a separate function that gets called before the main packet handler. It's a special handler for packet 0x33...
Also note that in client 7.0.25.0, that location of the 0x33 handler is called from 5 different locations in code and is for handling special packets -before- the main packet handler. Something to keep in mind. This style code is in clients from the 4.x to 7.x range.