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-rw-r--r--pkg/tcpip/transport/udp/endpoint.go9
1 files changed, 6 insertions, 3 deletions
diff --git a/pkg/tcpip/transport/udp/endpoint.go b/pkg/tcpip/transport/udp/endpoint.go
index 444b5b01c..4a2b6c03a 100644
--- a/pkg/tcpip/transport/udp/endpoint.go
+++ b/pkg/tcpip/transport/udp/endpoint.go
@@ -1444,13 +1444,16 @@ func (e *endpoint) HandlePacket(r *stack.Route, id stack.TransportEndpointID, pk
switch r.NetProto {
case header.IPv4ProtocolNumber:
packet.tos, _ = header.IPv4(pkt.NetworkHeader).TOS()
- packet.packetInfo.LocalAddr = r.LocalAddress
- packet.packetInfo.DestinationAddr = r.RemoteAddress
- packet.packetInfo.NIC = r.NICID()
case header.IPv6ProtocolNumber:
packet.tos, _ = header.IPv6(pkt.NetworkHeader).TOS()
}
+ // TODO(gvisor.dev/issue/3556): r.LocalAddress may be a multicast or broadcast
+ // address. packetInfo.LocalAddr should hold a unicast address that can be
+ // used to respond to the incoming packet.
+ packet.packetInfo.LocalAddr = r.LocalAddress
+ packet.packetInfo.DestinationAddr = r.LocalAddress
+ packet.packetInfo.NIC = r.NICID()
packet.timestamp = e.stack.Clock().NowNanoseconds()
e.rcvMu.Unlock()