1 files changed, 39 insertions, 0 deletions
diff --git a/src/vendor/golang.org/x/net/quic/udp_linux.go b/src/vendor/golang.org/x/net/quic/udp_linux.go
new file mode 100644
index 0000000000..08deaf9829
--- /dev/null
+++ b/src/vendor/golang.org/x/net/quic/udp_linux.go
@@ -0,0 +1,39 @@
+// 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.
+
+//go:build linux
+
+package quic
+
+import (
+	"syscall"
+)
+
+const (
+	ip_recvtos       = syscall.IP_RECVTOS
+	ipv6_recvpktinfo = syscall.IPV6_RECVPKTINFO
+	ipv6_pktinfo     = syscall.IPV6_PKTINFO
+)
+
+// See udp.go.
+const (
+	udpECNSupport              = true
+	udpInvalidLocalAddrIsError = false
+)
+
+// The IP_TOS socket option is a single byte containing the IP TOS field.
+// The low two bits are the ECN field.
+
+func parseIPTOS(b []byte) (ecnBits, bool) {
+	if len(b) != 1 {
+		return 0, false
+	}
+	return ecnBits(b[0] & ecnMask), true
+}
+
+func appendCmsgECNv4(b []byte, ecn ecnBits) []byte {
+	b, data := appendCmsg(b, syscall.IPPROTO_IP, syscall.IP_TOS, 1)
+	data[0] = byte(ecn)
+	return b
+}