mirror of
https://github.com/Control-D-Inc/ctrld.git
synced 2026-10-12 01:58:46 +02:00
Anthony Wong
8ae09ac98e
The journal records the network state of the host and each change of that state. The support team reads one file to see the interfaces, the routes, the resolvers, and the recoveries around an incident. The same file shows the health of the query path. A change that touches only AirDrop or virtual interfaces runs no DNS work.
84 lines
2.6 KiB
Go
84 lines
2.6 KiB
Go
package cli
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import (
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"strings"
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"testing"
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)
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// Captured from "ifconfig -v utunN" on macOS. A tunnel that a network extension
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// owns carries an agent line with the product name in desc.
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const ifconfigWindscribeTunnel = `utun4: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1420
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index 22
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eflags=1002080<NOAUTOIPV6LL,IPV6_ND6_ALT,TXSTART,NOACKPRI>
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options=6460<TSO4,TSO6,CHANNEL_DRV,PARTIAL_CSUM,ZEROINVERT_CSUM>
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inet 100.96.0.2 --> 100.96.0.2 netmask 0xffffffff
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nd6 options=201<PERFORMNUD,DAD>
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agent domain:NetworkExtension type:NetworkExtension flags:0xf desc:"Windscribe VPN"
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agent domain:Multipath type:Path Source flags:0x3 desc:"Multipath path manager"
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netif: 6d1e1b2a-4c55-4f0b-9f0a-1d2e3f4a5b6c
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scheduler: FQ_CODEL
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link quality: 100 (good)
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`
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const ifconfigTailscaleTunnel = `utun6: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1280
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index 24
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agent domain:NetworkExtension type:NetworkExtension flags:0xf desc:"Tailscale Tunnel"
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nd6 options=201<PERFORMNUD,DAD>
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`
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const ifconfigSystemTunnel = `utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1500
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index 16
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eflags=1002080<NOAUTOIPV6LL,IPV6_ND6_ALT,TXSTART,NOACKPRI>
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inet6 fe80::e1a2:3b4c:5d6e:7f80%utun0 prefixlen 64 scopeid 0x10
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nd6 options=201<PERFORMNUD,DAD>
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scheduler: FQ_CODEL
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`
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func Test_parseIfconfigAgent(t *testing.T) {
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tests := []struct {
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name string
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output string
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want string
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}{
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{
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name: "a VPN network extension owns the tunnel",
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output: ifconfigWindscribeTunnel,
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want: "Windscribe VPN",
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},
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{
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name: "a mesh client owns the tunnel",
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output: ifconfigTailscaleTunnel,
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want: "Tailscale Tunnel",
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},
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{
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name: "no agent line",
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output: ifconfigSystemTunnel,
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},
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{
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name: "no output",
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output: "",
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},
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{
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name: "an agent line without a description",
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output: "\tagent domain:Multipath type:Path Source flags:0x3\n\tagent domain:NetworkExtension type:NetworkExtension flags:0xf desc:\"Windscribe VPN\"\n",
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want: "Windscribe VPN",
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},
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}
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for _, tc := range tests {
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t.Run(tc.name, func(t *testing.T) {
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if got := parseIfconfigAgent(strings.NewReader(tc.output)); got != tc.want {
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t.Fatalf("parseIfconfigAgent() = %q, want %q", got, tc.want)
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}
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})
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}
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}
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// Test_parseIfconfigAgentRejectsAnOversizedLine covers a truncated read. An
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// owner that the reader did not reach is not an owner that does not exist.
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func Test_parseIfconfigAgentRejectsAnOversizedLine(t *testing.T) {
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output := strings.Repeat("a", 70<<10) + "\n" + ifconfigWindscribeTunnel
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if got := parseIfconfigAgent(strings.NewReader(output)); got != "" {
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t.Fatalf("tunnel owner of a truncated read = %q, want an empty owner", got)
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}
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}
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