qlog stateless resets

packet_handler_map.go

@@ -4,7 +4,7 @@ import (
 	"crypto/hmac"
 	"crypto/rand"
 	"crypto/sha256"
-	"errors"
+	"fmt"
 	"hash"
 	"net"
 	"sync"
@@ -15,6 +15,16 @@ import (
 	"github.com/lucas-clemente/quic-go/internal/wire"
 )
 
+type statelessResetErr struct {
+	token *[16]byte
+}
+
+func (e statelessResetErr) StatelessResetToken() *[16]byte { return e.token }
+
+func (e statelessResetErr) Error() string {
+	return fmt.Sprintf("received a stateless reset with token %x", *e.token)
+}
+
 // The packetHandlerMap stores packetHandlers, identified by connection ID.
 // It is used:
 // * by the server to store sessions
@@ -285,7 +295,7 @@ func (h *packetHandlerMap) maybeHandleStatelessReset(data []byte) bool {
 	copy(token[:], data[len(data)-16:])
 	if sess, ok := h.resetTokens[token]; ok {
 		h.logger.Debugf("Received a stateless reset with token %#x. Closing session.", token)
-		go sess.destroy(errors.New("received a stateless reset"))
+		go sess.destroy(&statelessResetErr{token: &token})
 		return true
 	}
 	return false