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// Copyright 2021 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package ethernet_test
import (
"testing"
"gvisor.dev/gvisor/pkg/tcpip"
"gvisor.dev/gvisor/pkg/tcpip/buffer"
"gvisor.dev/gvisor/pkg/tcpip/header"
"gvisor.dev/gvisor/pkg/tcpip/link/channel"
"gvisor.dev/gvisor/pkg/tcpip/link/ethernet"
"gvisor.dev/gvisor/pkg/tcpip/stack"
)
var _ stack.NetworkDispatcher = (*testNetworkDispatcher)(nil)
type testNetworkDispatcher struct {
networkPackets int
}
func (t *testNetworkDispatcher) DeliverNetworkPacket(_, _ tcpip.LinkAddress, _ tcpip.NetworkProtocolNumber, _ *stack.PacketBuffer) {
t.networkPackets++
}
func (*testNetworkDispatcher) DeliverOutboundPacket(_, _ tcpip.LinkAddress, _ tcpip.NetworkProtocolNumber, _ *stack.PacketBuffer) {
}
func TestDeliverNetworkPacket(t *testing.T) {
const (
linkAddr = tcpip.LinkAddress("\x02\x02\x03\x04\x05\x06")
otherLinkAddr1 = tcpip.LinkAddress("\x02\x02\x03\x04\x05\x07")
otherLinkAddr2 = tcpip.LinkAddress("\x02\x02\x03\x04\x05\x08")
)
e := ethernet.New(channel.New(0, 0, linkAddr))
var networkDispatcher testNetworkDispatcher
e.Attach(&networkDispatcher)
if networkDispatcher.networkPackets != 0 {
t.Fatalf("got networkDispatcher.networkPackets = %d, want = 0", networkDispatcher.networkPackets)
}
// An ethernet frame with a destination link address that is not assigned to
// our ethernet link endpoint should still be delivered to the network
// dispatcher since the ethernet endpoint is not expected to filter frames.
eth := buffer.NewView(header.EthernetMinimumSize)
header.Ethernet(eth).Encode(&header.EthernetFields{
SrcAddr: otherLinkAddr1,
DstAddr: otherLinkAddr2,
Type: header.IPv4ProtocolNumber,
})
e.DeliverNetworkPacket("", "", 0, stack.NewPacketBuffer(stack.PacketBufferOptions{
Data: eth.ToVectorisedView(),
}))
if networkDispatcher.networkPackets != 1 {
t.Fatalf("got networkDispatcher.networkPackets = %d, want = 1", networkDispatcher.networkPackets)
}
}
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