1 files changed, 28 insertions, 0 deletions
diff --git a/src/vendor/golang.org/x/net/quic/udp.go b/src/vendor/golang.org/x/net/quic/udp.go
new file mode 100644
index 0000000000..cf23c5ce88
--- /dev/null
+++ b/src/vendor/golang.org/x/net/quic/udp.go
@@ -0,0 +1,28 @@
+// Copyright 2023 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 quic
+
+import "net/netip"
+
+// Per-plaform consts describing support for various features.
+//
+// const udpECNSupport indicates whether the platform supports setting
+// the ECN (Explicit Congestion Notification) IP header bits.
+//
+// const udpInvalidLocalAddrIsError indicates whether sending a packet
+// from an local address not associated with the system is an error.
+// For example, assuming 127.0.0.2 is not a local address, does sending
+// from it (using IP_PKTINFO or some other such feature) result in an error?
+
+// unmapAddrPort returns a with any IPv4-mapped IPv6 address prefix removed.
+func unmapAddrPort(a netip.AddrPort) netip.AddrPort {
+	if a.Addr().Is4In6() {
+		return netip.AddrPortFrom(
+			a.Addr().Unmap(),
+			a.Port(),
+		)
+	}
+	return a
+}