need help about the login logic of the client.exe

[harder_programmer]

Hello, I need help about matching the logic of DragonNest.exe, so that I can modify the code of LoginServer.exe to match the client. Does anyone have any idea about it? Since it's just binary, not sure how to crack the sendloginpacket part from the client. Now I can prepare the sqls, 6 greens, just the LoginServer sln seems having different logic to receive login packet corresponding to the DragonNest.exe. The client I am using is 5 roles, LV60 cap EX, server side is same with client, the source code origins from the forum of ragezone. If anyone can give any help, I would appreciate it.