Only pass stack.Route's fields to LinkEndpoints

stack.Route is used to send network packets and resolve link addresses.
A LinkEndpoint does not need to do either of these and only needs the
route's fields at the time of the packet write request.

Since LinkEndpoints only need the route's fields when writing packets,
pass a stack.RouteInfo instead.

PiperOrigin-RevId: 352108405

2 files changed, 6 insertions, 6 deletions

diff --git a/pkg/tcpip/link/muxed/injectable.go b/pkg/tcpip/link/muxed/injectable.go
index 22e79ce3a..316f508e6 100644
--- a/pkg/tcpip/link/muxed/injectable.go
+++ b/pkg/tcpip/link/muxed/injectable.go
@@ -87,7 +87,7 @@ func (m *InjectableEndpoint) InjectInbound(protocol tcpip.NetworkProtocolNumber,
 // WritePackets writes outbound packets to the appropriate
 // LinkInjectableEndpoint based on the RemoteAddress. HandleLocal only works if
 // r.RemoteAddress has a route registered in this endpoint.
-func (m *InjectableEndpoint) WritePackets(r *stack.Route, gso *stack.GSO, pkts stack.PacketBufferList, protocol tcpip.NetworkProtocolNumber) (int, *tcpip.Error) {
+func (m *InjectableEndpoint) WritePackets(r stack.RouteInfo, gso *stack.GSO, pkts stack.PacketBufferList, protocol tcpip.NetworkProtocolNumber) (int, *tcpip.Error) {
 	endpoint, ok := m.routes[r.RemoteAddress]
 	if !ok {
 		return 0, tcpip.ErrNoRoute
@@ -98,7 +98,7 @@ func (m *InjectableEndpoint) WritePackets(r *stack.Route, gso *stack.GSO, pkts s
 // WritePacket writes outbound packets to the appropriate LinkInjectableEndpoint
 // based on the RemoteAddress. HandleLocal only works if r.RemoteAddress has a
 // route registered in this endpoint.
-func (m *InjectableEndpoint) WritePacket(r *stack.Route, gso *stack.GSO, protocol tcpip.NetworkProtocolNumber, pkt *stack.PacketBuffer) *tcpip.Error {
+func (m *InjectableEndpoint) WritePacket(r stack.RouteInfo, gso *stack.GSO, protocol tcpip.NetworkProtocolNumber, pkt *stack.PacketBuffer) *tcpip.Error {
 	if endpoint, ok := m.routes[r.RemoteAddress]; ok {
 		return endpoint.WritePacket(r, gso, protocol, pkt)
 	}
diff --git a/pkg/tcpip/link/muxed/injectable_test.go b/pkg/tcpip/link/muxed/injectable_test.go
index b511d3a31..ba30287bc 100644
--- a/pkg/tcpip/link/muxed/injectable_test.go
+++ b/pkg/tcpip/link/muxed/injectable_test.go
@@ -51,10 +51,10 @@ func TestInjectableEndpointDispatch(t *testing.T) {
 		Data:               buffer.NewViewFromBytes([]byte{0xFB}).ToVectorisedView(),
 	})
 	pkt.TransportHeader().Push(1)[0] = 0xFA
-	var packetRoute stack.Route
+	var packetRoute stack.RouteInfo
 	packetRoute.RemoteAddress = dstIP
 
-	endpoint.WritePacket(&packetRoute, nil /* gso */, ipv4.ProtocolNumber, pkt)
+	endpoint.WritePacket(packetRoute, nil /* gso */, ipv4.ProtocolNumber, pkt)
 
 	buf := make([]byte, 6500)
 	bytesRead, err := sock.Read(buf)
@@ -74,9 +74,9 @@ func TestInjectableEndpointDispatchHdrOnly(t *testing.T) {
 		Data:               buffer.NewView(0).ToVectorisedView(),
 	})
 	pkt.TransportHeader().Push(1)[0] = 0xFA
-	var packetRoute stack.Route
+	var packetRoute stack.RouteInfo
 	packetRoute.RemoteAddress = dstIP
-	endpoint.WritePacket(&packetRoute, nil /* gso */, ipv4.ProtocolNumber, pkt)
+	endpoint.WritePacket(packetRoute, nil /* gso */, ipv4.ProtocolNumber, pkt)
 	buf := make([]byte, 6500)
 	bytesRead, err := sock.Read(buf)
 	if err != nil {