1 files changed, 67 insertions, 0 deletions
diff --git a/src/vendor/golang.org/x/net/quic/udp_packetconn.go b/src/vendor/golang.org/x/net/quic/udp_packetconn.go
new file mode 100644
index 0000000000..2c7e71cf61
--- /dev/null
+++ b/src/vendor/golang.org/x/net/quic/udp_packetconn.go
@@ -0,0 +1,67 @@
+// Copyright 2024 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"
+	"net/netip"
+)
+
+// netPacketConn is a packetConn implementation wrapping a net.PacketConn.
+//
+// This is mostly useful for tests, since PacketConn doesn't provide access to
+// important features such as identifying the local address packets were received on.
+type netPacketConn struct {
+	c         net.PacketConn
+	localAddr netip.AddrPort
+}
+
+func newNetPacketConn(pc net.PacketConn) (*netPacketConn, error) {
+	addr, err := addrPortFromAddr(pc.LocalAddr())
+	if err != nil {
+		return nil, err
+	}
+	return &netPacketConn{
+		c:         pc,
+		localAddr: addr,
+	}, nil
+}
+
+func (c *netPacketConn) Close() error {
+	return c.c.Close()
+}
+
+func (c *netPacketConn) LocalAddr() netip.AddrPort {
+	return c.localAddr
+}
+
+func (c *netPacketConn) Read(f func(*datagram)) {
+	for {
+		dgram := newDatagram()
+		n, peerAddr, err := c.c.ReadFrom(dgram.b)
+		if err != nil {
+			return
+		}
+		dgram.peerAddr, err = addrPortFromAddr(peerAddr)
+		if err != nil {
+			continue
+		}
+		dgram.b = dgram.b[:n]
+		f(dgram)
+	}
+}
+
+func (c *netPacketConn) Write(dgram datagram) error {
+	_, err := c.c.WriteTo(dgram.b, net.UDPAddrFromAddrPort(dgram.peerAddr))
+	return err
+}
+
+func addrPortFromAddr(addr net.Addr) (netip.AddrPort, error) {
+	switch a := addr.(type) {
+	case *net.UDPAddr:
+		return a.AddrPort(), nil
+	}
+	return netip.ParseAddrPort(addr.String())
+}