93 lines
2.9 KiB
Go
93 lines
2.9 KiB
Go
// Copyright 2018 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ipv4_test
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import (
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"testing"
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"gvisor.googlesource.com/gvisor/pkg/tcpip"
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"gvisor.googlesource.com/gvisor/pkg/tcpip/header"
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"gvisor.googlesource.com/gvisor/pkg/tcpip/link/channel"
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"gvisor.googlesource.com/gvisor/pkg/tcpip/link/sniffer"
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"gvisor.googlesource.com/gvisor/pkg/tcpip/network/ipv4"
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"gvisor.googlesource.com/gvisor/pkg/tcpip/stack"
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"gvisor.googlesource.com/gvisor/pkg/tcpip/transport/udp"
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"gvisor.googlesource.com/gvisor/pkg/waiter"
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)
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func TestExcludeBroadcast(t *testing.T) {
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s := stack.New([]string{ipv4.ProtocolName}, []string{udp.ProtocolName}, stack.Options{})
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const defaultMTU = 65536
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id, _ := channel.New(256, defaultMTU, "")
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if testing.Verbose() {
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id = sniffer.New(id)
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}
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if err := s.CreateNIC(1, id); err != nil {
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t.Fatalf("CreateNIC failed: %v", err)
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}
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if err := s.AddAddress(1, ipv4.ProtocolNumber, header.IPv4Broadcast); err != nil {
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t.Fatalf("AddAddress failed: %v", err)
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}
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if err := s.AddAddress(1, ipv4.ProtocolNumber, header.IPv4Any); err != nil {
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t.Fatalf("AddAddress failed: %v", err)
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}
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s.SetRouteTable([]tcpip.Route{{
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Destination: "\x00\x00\x00\x00",
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Mask: "\x00\x00\x00\x00",
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Gateway: "",
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NIC: 1,
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}})
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randomAddr := tcpip.FullAddress{NIC: 1, Addr: "\x0a\x00\x00\x01", Port: 53}
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var wq waiter.Queue
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t.Run("WithoutPrimaryAddress", func(t *testing.T) {
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ep, err := s.NewEndpoint(udp.ProtocolNumber, ipv4.ProtocolNumber, &wq)
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if err != nil {
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t.Fatal(err)
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}
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defer ep.Close()
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// Cannot connect using a broadcast address as the source.
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if err := ep.Connect(randomAddr); err != tcpip.ErrNoRoute {
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t.Errorf("got ep.Connect(...) = %v, want = %v", err, tcpip.ErrNoRoute)
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}
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// However, we can bind to a broadcast address to listen.
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if err := ep.Bind(tcpip.FullAddress{Addr: header.IPv4Broadcast, Port: 53, NIC: 1}, nil); err != nil {
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t.Errorf("Bind failed: %v", err)
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}
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})
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t.Run("WithPrimaryAddress", func(t *testing.T) {
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ep, err := s.NewEndpoint(udp.ProtocolNumber, ipv4.ProtocolNumber, &wq)
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if err != nil {
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t.Fatal(err)
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}
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defer ep.Close()
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// Add a valid primary endpoint address, now we can connect.
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if err := s.AddAddress(1, ipv4.ProtocolNumber, "\x0a\x00\x00\x02"); err != nil {
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t.Fatalf("AddAddress failed: %v", err)
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}
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if err := ep.Connect(randomAddr); err != nil {
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t.Errorf("Connect failed: %v", err)
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}
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})
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}
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