/*
* Virtual Gamepad Emulation Framework - Windows kernel-mode bus driver
*
* MIT License
*
* Copyright (c) 2016-2019 Nefarius Software Solutions e.U. and Contributors
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/


#include <ntifs.h>
#include "busenum.h"
#include "util.tmh"


VOID ReverseByteArray(PUCHAR Array, INT Length)
{
    PUCHAR s = (PUCHAR)ExAllocatePoolWithTag(NonPagedPool, sizeof(UCHAR) * Length, VIGEM_POOL_TAG);
    INT c, d;

    if (s == NULL)
        return;

    for (c = Length - 1, d = 0; c >= 0; c--, d++)
        *(s + d) = *(Array + c);

    for (c = 0; c < Length; c++)
        *(Array + c) = *(s + c);

    ExFreePoolWithTag(s, VIGEM_POOL_TAG);
}

VOID GenerateRandomMacAddress(PMAC_ADDRESS Address)
{
    // Vendor "C0:13:37"
    Address->Vendor0 = 0xC0;
    Address->Vendor1 = 0x13;
    Address->Vendor2 = 0x37;

    ULONG seed = KeQueryPerformanceCounter(NULL).LowPart;
    
    Address->Nic0 = RtlRandomEx(&seed) % 0xFF;
    Address->Nic1 = RtlRandomEx(&seed) % 0xFF;
    Address->Nic2 = RtlRandomEx(&seed) % 0xFF;
}