public void bitmap_from_small_end()
{
using var tracker = new PNetMeshPacketTracker();
var counters = new ulong[] { 1, 29, 45, 49, 48, 46, 50 };
for (int i = 0; i < counters.Length; i++)
{
Assert.True(tracker.TryAdd(counters[i]));
}
var buffer = new byte[8];
tracker.GetBitmap(45, buffer.AsSpan().Slice(0, 1), out var bytesUsed);
Assert.Equal(1, bytesUsed);
var bits = new BitArray(buffer);
Assert.True(bits.Get(0)); //45
Assert.True(bits.Get(1)); //46
Assert.False(bits.Get(2)); //47
Assert.True(bits.Get(3)); //48
Assert.True(bits.Get(4)); //49
Assert.True(bits.Get(5)); //50
}
public void detect_window(int counterSize)
{
using var tracker = new PNetMeshPacketTracker(counterSize);
Assert.True(counterSize <= tracker.Size);
ulong i;
for (i = 0; i < 5000; i += 3)
{
Assert.True(tracker.TryAdd(i));
}
Assert.Equal(i - 3, tracker.Current);
Assert.False(tracker.TryAdd(0));
Assert.False(tracker.TryAdd(3));
var l = i - (ulong)tracker.Size - 3;
Assert.Equal(l, tracker.Latest);
Assert.Equal(l % 3 != 0, tracker.TryAdd(l));
Assert.False(tracker.TryAdd(l));
for (i = 0; i < 5000; i++)
{
if (tracker.TryAdd(i))
{
break;
}
}
Assert.True(l < i);
}
public void detect_no_replay()
{
using var tracker = new PNetMeshPacketTracker();
var counters = new ulong[] { 1, 29, 49, 48, 50 };
for (int i = 0; i < counters.Length; i++)
{
Assert.True(tracker.TryAdd(counters[i]));
}
}
public void detect_expired()
{
using var tracker = new PNetMeshPacketTracker();
var counters = new ulong[] { 1, 29, 49, 48, 50, 2000, 2050 };
for (int i = 0; i < counters.Length; i++)
{
Assert.True(tracker.TryAdd(counters[i]));
}
Assert.False(tracker.TryAdd(2));
}
public void bitmap_right_shift()
{
var bitmap = new byte[] { 0x7F, 0x01 }; // 0000_0001 0111_1111
var c = PNetMeshPacketTracker.RightShift(bitmap, out var bytesUsed);
Assert.True(c == 7);
Assert.True(bytesUsed == 1);
Assert.True(bitmap[0] == 0x02);
Assert.True(bitmap[1] == 0x00);
bitmap = new byte[] { 0x7F, 0x01, 0x02 }; // 0000_0010 0000_0001 0111_1111
c = PNetMeshPacketTracker.RightShift(bitmap, out bytesUsed);
Assert.True(c == 7);
Assert.True(bytesUsed == 2);
Assert.True(bitmap[0] == 0x02);
Assert.True(bitmap[1] == 0x04);
Assert.True(bitmap[2] == 0x00);
bitmap = new byte[] { 0xFF, 0xFF, 0x1b }; // 0001_1011 1111_1111 1111_1111
c = PNetMeshPacketTracker.RightShift(bitmap, out bytesUsed);
Assert.True(c == 18);
Assert.True(bytesUsed == 1);
Assert.True(bitmap[0] == 0x06);
Assert.True(bitmap[1] == 0x00);
Assert.True(bitmap[2] == 0x00);
bitmap = new byte[] { 0xFF, 0xFF, 0x01 }; // 0000_0001 1111_1111 1111_1111
c = PNetMeshPacketTracker.RightShift(bitmap, out bytesUsed);
Assert.True(c == 17);
Assert.True(bytesUsed == 0);
Assert.True(bitmap[0] == 0x00);
Assert.True(bitmap[1] == 0x00);
Assert.True(bitmap[2] == 0x00);
}
public void bitmap_from_large_set(int counterSize)
{
using var tracker = new PNetMeshPacketTracker(counterSize);
int i;
for (i = 0; i < 5000; i += 3)
{
Assert.True(tracker.TryAdd((ulong)i));
}
var buffer = new byte[64];
tracker.GetBitmap(4488, buffer, out var bytesUsed);
Assert.Equal(64, bytesUsed);
var bits = new BitArray(buffer);
for (i = 0; 4488 + i < (int)tracker.Current; i++)
{
Assert.Equal(i % 3 == 0, bits[i]);
}
}
