public static async Task <ulong> GetPointerAddressFromExpression(ISwitchConnectionAsync sw, string pointerExpression, CancellationToken token)
{
// Regex pattern to get operators and offsets from pointer expression.
const string pattern = @"(\+|\-)([A-Fa-f0-9]+)";
Regex regex = new(pattern);
Match match = regex.Match(pointerExpression);
// Get first offset from pointer expression and read address at that offset from main start.
var ofs = Convert.ToUInt64(match.Groups[2].Value, 16);
var address = BitConverter.ToUInt64(await sw.ReadBytesMainAsync(ofs, 0x8, token).ConfigureAwait(false), 0);
match = match.NextMatch();
// Matches the rest of the operators and offsets in the pointer expression.
while (match.Success)
{
// Get operator and offset from match.
string opp = match.Groups[1].Value;
ofs = Convert.ToUInt64(match.Groups[2].Value, 16);
// Add or subtract the offset from the current stored address based on operator in front of offset.
switch (opp)
{
case "+":
address += ofs;
break;
case "-":
address -= ofs;
break;
}
// Attempt another match and if successful read bytes at address and store the new address.
match = match.NextMatch();
if (!match.Success)
{
continue;
}
byte[] bytes = await sw.ReadBytesAbsoluteAsync(address, 0x8, token).ConfigureAwait(false);
address = BitConverter.ToUInt64(bytes, 0);
}
return(address);
}
public async Task <ulong> FollowMainPointer(long[] jumps, bool canSolveOnSysmodule, CancellationToken token) //include the last jump here
{
// 1.7+ sys-botbase can solve entire pointer
if (canSolveOnSysmodule)
{
var jumpsWithoutLast = jumps.Take(jumps.Length - 1);
byte[] command = Encoding.UTF8.GetBytes($"pointer{string.Concat(jumpsWithoutLast.Select(z => $" {z}"))}\r\n");
byte[] socketReturn = await Connection.ReadRaw(command, sizeof(ulong) * 2 + 1, token).ConfigureAwait(false);
var bytes = Base.Decoder.ConvertHexByteStringToBytes(socketReturn);
bytes = bytes.Reverse().ToArray();
var offset = (ulong)((long)BitConverter.ToUInt64(bytes, 0) + jumps[jumps.Length - 1]);
return(offset);
}
// solve pointer manually
var ofs = (ulong)jumps[0]; // won't work with negative first jump
var address = BitConverter.ToUInt64(await Connection.ReadBytesMainAsync(ofs, 0x8, token).ConfigureAwait(false), 0);
for (int i = 1; i < jumps.Length - 1; ++i)
{
await Task.Delay(0_008, token).ConfigureAwait(false); // 1/4 frame
var jump = jumps[i];
if (jump > 0)
{
address += (ulong)jump;
}
else
{
address -= (ulong)Math.Abs(jump);
}
byte[] bytes = await Connection.ReadBytesAbsoluteAsync(address, 0x8, token).ConfigureAwait(false);
address = BitConverter.ToUInt64(bytes, 0);
}
return(address + (ulong)jumps[jumps.Length - 1]);
}
