127 lines
4.4 KiB
Go
127 lines
4.4 KiB
Go
// Copyright 2018 Google Inc.
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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 integration_test
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import (
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"fmt"
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"io/ioutil"
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"net"
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"os"
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"os/exec"
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"testing"
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"github.com/rtr7/router7/internal/radvd"
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"github.com/google/go-cmp/cmp"
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)
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func TestRouterAdvertisement(t *testing.T) {
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const ns = "ns2" // name of the network namespace to use for this test
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add := exec.Command("ip", "netns", "add", ns)
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add.Stderr = os.Stderr
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if err := add.Run(); err != nil {
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t.Fatalf("%v: %v", add.Args, err)
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}
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defer exec.Command("ip", "netns", "delete", ns).Run()
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nsSetup := []*exec.Cmd{
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exec.Command("ip", "link", "add", "veth2a", "type", "veth", "peer", "name", "veth2b", "netns", ns),
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// Disable Duplicate Address Detection: until DAD completes, the link-local
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// address remains in state “tentative”, resulting in any attempts to
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// bind(2) to the address to fail with -EADDRNOTAVAIL.
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exec.Command("/bin/sh", "-c", "echo 0 > /proc/sys/net/ipv6/conf/veth2a/accept_dad"),
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exec.Command("ip", "netns", "exec", ns, "/bin/sh", "-c", "echo 0 > /proc/sys/net/ipv6/conf/veth2b/accept_dad"),
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exec.Command("ip", "link", "set", "veth2a", "address", "02:73:53:00:ca:fe"),
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exec.Command("ip", "link", "set", "veth2a", "up"),
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exec.Command("ip", "netns", "exec", ns, "ip", "addr", "add", "192.168.23.1/24", "dev", "veth2b"),
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exec.Command("ip", "netns", "exec", ns, "ip", "link", "set", "veth2b", "up"),
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exec.Command("ip", "netns", "exec", ns, "ip", "link", "set", "veth2b"),
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exec.Command("/bin/sh", "-c", "echo 1 > /proc/sys/net/ipv6/conf/veth2a/forwarding"),
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}
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for _, cmd := range nsSetup {
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if err := cmd.Run(); err != nil {
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t.Fatalf("%v: %v", cmd.Args, err)
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}
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}
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ready, err := ioutil.TempFile("", "router7")
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if err != nil {
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t.Fatal(err)
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}
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ready.Close() // dnsmasq will re-create the file anyway
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defer os.Remove(ready.Name()) // dnsmasq does not clean up its pid file
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srv, err := radvd.NewServer()
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if err != nil {
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t.Fatal(err)
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}
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srv.SetPrefixes([]net.IPNet{
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net.IPNet{IP: net.ParseIP("2a02:168:4a00::"), Mask: net.CIDRMask(64, 128)},
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})
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conn, err := net.ListenIP("ip6:ipv6-icmp", &net.IPAddr{net.IPv6unspecified, ""})
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if err != nil {
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t.Fatal(err)
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}
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go func() {
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if err := srv.Serve("veth2a", conn); err != nil {
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panic(fmt.Sprintf("failed to serve router advertisements: %v", err))
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}
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}()
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//time.Sleep(5 * time.Second)
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rdisc6 := exec.Command("ip", "netns", "exec", ns, "rdisc6",
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"--single", // exit after first router advertisement
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"--retry", "1", // retry only once
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"--wait", "1000", // wait 1s
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"veth2b")
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rdisc6.Stderr = os.Stderr
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b, err := rdisc6.Output()
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if err != nil {
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t.Fatalf("%v: %v (output: %v)", rdisc6.Args, err, string(b))
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}
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got := string(b)
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want := `Soliciting ff02::2 (ff02::2) on veth2b...
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Hop limit : 64 ( 0x40)
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Stateful address conf. : No
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Stateful other conf. : No
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Mobile home agent : No
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Router preference : medium
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Neighbor discovery proxy : No
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Router lifetime : 1800 (0x00000708) seconds
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Reachable time : unspecified (0x00000000)
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Retransmit time : unspecified (0x00000000)
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Recursive DNS server : fe80::73:53ff:fe00:cafe
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DNS server lifetime : 1800 (0x00000708) seconds
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Prefix : 2a02:168:4a00::/64
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On-link : Yes
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Autonomous address conf.: Yes
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Valid time : 7200 (0x00001c20) seconds
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Pref. time : 1800 (0x00000708) seconds
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DNS search list : lan
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DNS search list lifetime: 1200 (0x000004b0) seconds
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MTU : 1500 bytes (valid)
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Source link-layer address: 02:73:53:00:CA:FE
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from fe80::73:53ff:fe00:cafe
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`
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if diff := cmp.Diff(want, got); diff != "" {
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t.Fatalf("unexpected rdisc6 output: diff (-want +got):\n%s", diff)
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}
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}
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