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feat: validate matchmaking latency evidence

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This commit is contained in:
Josh Creek
2026-08-31 20:21:55 +01:00
parent 997175c753
commit cf212d94f9
3 changed files with 141 additions and 1 deletions
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server/domain/probes_test.go
+40
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@@ -0,0 +1,40 @@
package domain
import (
"errors"
"testing"
"time"
)
func TestValidateProbeRequiresOpaqueFreshNonceAndServerRTT(t *testing.T) {
now := time.Unix(100000, 0)
valid := ProbeEvidence{OpaqueLocation: []byte("opaque"), Nonce: []byte("nonce"), IssuedAt: now, Region: "EU", ServerRTT: 40 * time.Millisecond}
if err := ValidateProbe(valid, []byte("nonce"), now); err != nil { t.Fatal(err) }
for name, invalid := range map[string]ProbeEvidence{
"empty location": {Nonce: []byte("nonce"), IssuedAt: now, Region: "EU"},
"wrong nonce": {OpaqueLocation: []byte("opaque"), Nonce: []byte("other"), IssuedAt: now, Region: "EU"},
"stale": {OpaqueLocation: []byte("opaque"), Nonce: []byte("nonce"), IssuedAt: now.Add(-ProbeFreshness - time.Nanosecond), Region: "EU"},
"client chosen negative RTT": {OpaqueLocation: []byte("opaque"), Nonce: []byte("nonce"), IssuedAt: now, Region: "EU", ServerRTT: -time.Millisecond},
} {
if err := ValidateProbe(invalid, []byte("nonce"), now); !errors.Is(err, ErrInvalidProbe) { t.Fatalf("%s error = %v", name, err) }
}
}
func TestDiscrepancyQuarantineAndFiveCleanRelease(t *testing.T) {
now := time.Unix(100000, 0)
var tracker DiscrepancyTracker
for i := 0; i < DiscrepancyLimit; i++ { tracker.RecordComparison(40*time.Millisecond, 100*time.Millisecond, now.Add(time.Duration(i)*time.Minute)) }
if !tracker.Quarantined { t.Fatal("three discrepancies did not quarantine samples") }
if err := tracker.PlacementAllowed(); !errors.Is(err, ErrProbeQuarantined) { t.Fatal("quarantine not enforced") }
for i := 0; i < CleanSamplesToRelease; i++ { tracker.RecordComparison(40*time.Millisecond, 45*time.Millisecond, now.Add(time.Hour+time.Duration(i)*time.Minute)) }
if tracker.Quarantined { t.Fatal("five clean samples did not release quarantine") }
}
func TestDiscrepancyThresholdUsesLargerOfAbsoluteAndRelativeLimit(t *testing.T) {
now := time.Unix(100000, 0)
var tracker DiscrepancyTracker
tracker.RecordComparison(200*time.Millisecond, 250*time.Millisecond, now)
if tracker.Quarantined { t.Fatal("50ms discrepancy should be allowed when 30%% limit is 60ms") }
tracker.RecordComparison(200*time.Millisecond, 270*time.Millisecond, now.Add(time.Minute))
if len(tracker.BadSamples) != 1 { t.Fatal("70ms discrepancy should be recorded") }
}