V13

core/internal/wire/protocol_test.go

@@ -0,0 +1,29 @@
+package wire
+
+import (
+    "bytes"
+    "testing"
+)
+
+func TestMaskChangesWithSequenceAndRoundTrips(t *testing.T) {
+    var sid SessionID
+    for i := range sid { sid[i] = byte(i+1) }
+    plain := bytes.Repeat([]byte("DragonTCP"), 100)
+    a := append([]byte(nil), plain...)
+    b := append([]byte(nil), plain...)
+    MaskInPlace(a, sid, ModeUpload, 1, false)
+    MaskInPlace(b, sid, ModeUpload, 2, false)
+    if bytes.Equal(a, b) { t.Fatal("different sequences produced identical wire bytes") }
+    MaskInPlace(a, sid, ModeUpload, 1, false)
+    if !bytes.Equal(a, plain) { t.Fatal("mask did not round-trip") }
+}
+
+func BenchmarkMask1MiB(b *testing.B) {
+    var sid SessionID
+    data := make([]byte, 1024*1024)
+    b.SetBytes(int64(len(data)))
+    b.ResetTimer()
+    for i:=0;i<b.N;i++ {
+        MaskInPlace(data,sid,ModeUpload,uint64(i),false)
+    }
+}