1 files changed, 40 insertions, 0 deletions
diff --git a/src/vendor/golang.org/x/net/internal/http3/quic.go b/src/vendor/golang.org/x/net/internal/http3/quic.go
new file mode 100644
index 0000000000..4f1cca179e
--- /dev/null
+++ b/src/vendor/golang.org/x/net/internal/http3/quic.go
@@ -0,0 +1,40 @@
+// Copyright 2025 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package http3
+
+import (
+	"crypto/tls"
+
+	"golang.org/x/net/quic"
+)
+
+func initConfig(config *quic.Config) *quic.Config {
+	if config == nil {
+		config = &quic.Config{}
+	}
+
+	// maybeCloneTLSConfig clones the user-provided tls.Config (but only once)
+	// prior to us modifying it.
+	needCloneTLSConfig := true
+	maybeCloneTLSConfig := func() *tls.Config {
+		if needCloneTLSConfig {
+			config.TLSConfig = config.TLSConfig.Clone()
+			needCloneTLSConfig = false
+		}
+		return config.TLSConfig
+	}
+
+	if config.TLSConfig == nil {
+		config.TLSConfig = &tls.Config{}
+		needCloneTLSConfig = false
+	}
+	if config.TLSConfig.MinVersion == 0 {
+		maybeCloneTLSConfig().MinVersion = tls.VersionTLS13
+	}
+	if config.TLSConfig.NextProtos == nil {
+		maybeCloneTLSConfig().NextProtos = []string{"h3"}
+	}
+	return config
+}