mirror of
https://github.com/weaveworks/scope.git
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132 lines
2.8 KiB
Go
132 lines
2.8 KiB
Go
// +build linux
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package endpoint
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import (
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"net"
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"syscall"
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"testing"
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"github.com/typetypetype/conntrack"
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"github.com/weaveworks/common/mtime"
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"github.com/weaveworks/common/test"
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"github.com/weaveworks/scope/report"
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"github.com/weaveworks/scope/test/reflect"
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)
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type mockFlowWalker struct {
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flows []conntrack.Conn
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}
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func (m *mockFlowWalker) walkFlows(f func(f conntrack.Conn, active bool)) {
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for _, flow := range m.flows {
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f(flow, true)
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}
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}
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func (m *mockFlowWalker) stop() {}
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func TestNat(t *testing.T) {
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mtime.NowForce(mtime.Now())
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defer mtime.NowReset()
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// test that two containers, on the docker network, get their connections mapped
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// correctly.
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// the setup is this:
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//
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// container2 (10.0.47.2:22222), host2 (2.3.4.5:22223) ->
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// host1 (1.2.3.4:80), container1 (10.0.47.1:80)
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c1 := net.ParseIP("10.0.47.1")
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c2 := net.ParseIP("10.0.47.2")
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host2 := net.ParseIP("2.3.4.5")
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host1 := net.ParseIP("1.2.3.4")
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// from the PoV of host1
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{
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f := conntrack.Conn{
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MsgType: conntrack.NfctMsgUpdate,
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Orig: conntrack.Tuple{
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Src: host2,
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Dst: host1,
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SrcPort: 22222,
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DstPort: 80,
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Proto: syscall.IPPROTO_TCP,
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},
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Reply: conntrack.Tuple{
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Src: c1,
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Dst: host2,
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SrcPort: 80,
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DstPort: 22222,
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Proto: syscall.IPPROTO_TCP,
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},
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CtId: 1,
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}
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ct := &mockFlowWalker{
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flows: []conntrack.Conn{f},
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}
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have := report.MakeReport()
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originalID := report.MakeEndpointNodeID("host1", "", "10.0.47.1", "80")
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have.Endpoint.AddNode(report.MakeNodeWith(originalID, map[string]string{
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"foo": "bar",
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}))
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want := have.Copy()
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wantID := report.MakeEndpointNodeID("host1", "", "1.2.3.4", "80")
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want.Endpoint.AddNode(report.MakeNodeWith(wantID, map[string]string{
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CopyOf: originalID,
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"foo": "bar",
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}))
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makeNATMapper(ct).applyNAT(have, "host1")
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if !reflect.DeepEqual(want, have) {
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t.Fatal(test.Diff(want, have))
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}
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}
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// form the PoV of host2
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{
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f := conntrack.Conn{
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MsgType: conntrack.NfctMsgUpdate,
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Orig: conntrack.Tuple{
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Src: c2,
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Dst: host1,
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SrcPort: 22222,
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DstPort: 80,
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Proto: syscall.IPPROTO_TCP,
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},
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Reply: conntrack.Tuple{
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Src: host1,
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Dst: host2,
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SrcPort: 80,
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DstPort: 22223,
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Proto: syscall.IPPROTO_TCP,
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},
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CtId: 2,
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}
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ct := &mockFlowWalker{
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flows: []conntrack.Conn{f},
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}
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have := report.MakeReport()
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originalID := report.MakeEndpointNodeID("host2", "", "10.0.47.2", "22222")
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have.Endpoint.AddNode(report.MakeNodeWith(originalID, map[string]string{
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"foo": "baz",
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}))
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want := have.Copy()
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want.Endpoint.AddNode(report.MakeNodeWith(report.MakeEndpointNodeID("host2", "", "2.3.4.5", "22223"), map[string]string{
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CopyOf: originalID,
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"foo": "baz",
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}))
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makeNATMapper(ct).applyNAT(have, "host1")
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if !reflect.DeepEqual(want, have) {
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t.Fatal(test.Diff(want, have))
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}
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}
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}
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