public SendHook()
{
long address;
if (Environment.Is64BitProcess)
{
instructionLength = 12;
originalInstruction = new byte[instructionLength];
hookInstruction = new byte[instructionLength];
address = Globals.SendAddresses[1];
hookInstruction[0] = 0x48;
hookInstruction[1] = 0xB8;
hookInstruction[10] = 0xFF;
hookInstruction[11] = 0xE0;
}
else
{
instructionLength = 5;
originalInstruction = new byte[instructionLength];
hookInstruction = new byte[instructionLength];
address = Globals.SendAddresses[0];
hookInstruction[0] = 0xE9;
}
originalInstruction = new byte[instructionLength];
hookInstruction = new byte[instructionLength];
originalDelegate = Marshal.GetDelegateForFunctionPointer(new IntPtr(address + Memory.BaseAddress), typeof(ClientSendDummy)) as ClientSendDummy;
Console.WriteLine("Initialize Send hook...");
// Assign function pointers
originalFunction = Marshal.GetFunctionPointerForDelegate(originalDelegate);
hookFunction = Marshal.GetFunctionPointerForDelegate(hookDelegate);
// Store original & hook instructions
Buffer.BlockCopy(Memory.Read(originalFunction, instructionLength), 0, originalInstruction, 0, instructionLength);
if (Environment.Is64BitProcess)
Buffer.BlockCopy(BitConverter.GetBytes(hookFunction.ToInt64()), 0, hookInstruction, 2, 8);
else
{
var hookOffset = hookFunction.ToInt64() - (originalFunction.ToInt64() + instructionLength);
Buffer.BlockCopy(BitConverter.GetBytes((uint)hookOffset), 0, hookInstruction, 1, 4);
}
Memory.Write(originalFunction, hookInstruction);
Console.WriteLine("Send hook successfully initialized");
}
