2021-04-28 16:15:45 +02:00
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package cli
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import (
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"fmt"
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"log"
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2021-07-17 00:23:12 +02:00
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"strconv"
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2021-05-08 13:28:22 +02:00
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"strings"
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Fix nil dereference in nodes list command.
Fixes a nil pointer dereference observed when listing nodes that have
not yet connected.
```
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xb931a4]
goroutine 1 [running]:
github.com/juanfont/headscale/cmd/headscale/cli.glob..func8(0x13c93e0, 0xc0004c4220, 0x0, 0x2)
/go/src/headscale/cmd/headscale/cli/nodes.go:74 +0x364
github.com/spf13/cobra.(*Command).execute(0x13c93e0, 0xc0004c41e0, 0x2, 0x2, 0x13c93e0, 0xc0004c41e0)
/go/pkg/mod/github.com/spf13/cobra@v1.1.3/command.go:856 +0x2c2
github.com/spf13/cobra.(*Command).ExecuteC(0x13ca2e0, 0xc000497110, 0xe76416, 0x6)
/go/pkg/mod/github.com/spf13/cobra@v1.1.3/command.go:960 +0x375
github.com/spf13/cobra.(*Command).Execute(...)
/go/pkg/mod/github.com/spf13/cobra@v1.1.3/command.go:897
main.main()
/go/src/headscale/cmd/headscale/headscale.go:89 +0x805
command terminated with exit code 2
```
2021-06-20 01:18:13 +02:00
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"time"
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2021-04-28 16:15:45 +02:00
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2021-07-17 11:09:42 +02:00
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survey "github.com/AlecAivazis/survey/v2"
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2021-08-15 23:10:39 +02:00
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"github.com/juanfont/headscale"
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"github.com/pterm/pterm"
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2021-04-28 16:15:45 +02:00
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"github.com/spf13/cobra"
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2021-08-15 23:10:39 +02:00
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"tailscale.com/tailcfg"
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"tailscale.com/types/wgkey"
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2021-04-28 16:15:45 +02:00
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)
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2021-07-31 23:14:24 +02:00
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func init() {
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rootCmd.AddCommand(nodeCmd)
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2021-07-25 15:04:06 +02:00
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nodeCmd.PersistentFlags().StringP("namespace", "n", "", "Namespace")
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2021-07-25 16:26:15 +02:00
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err := nodeCmd.MarkPersistentFlagRequired("namespace")
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if err != nil {
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log.Fatalf(err.Error())
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}
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2021-07-25 15:04:06 +02:00
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nodeCmd.AddCommand(listNodesCmd)
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nodeCmd.AddCommand(registerNodeCmd)
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nodeCmd.AddCommand(deleteNodeCmd)
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}
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var nodeCmd = &cobra.Command{
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2021-06-28 20:04:05 +02:00
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Use: "nodes",
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Short: "Manage the nodes of Headscale",
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}
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2021-07-25 15:04:06 +02:00
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var registerNodeCmd = &cobra.Command{
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2021-04-30 00:23:26 +02:00
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Use: "register machineID",
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2021-04-28 16:15:45 +02:00
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Short: "Registers a machine to your network",
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Args: func(cmd *cobra.Command, args []string) error {
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2021-04-30 00:23:26 +02:00
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if len(args) < 1 {
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2021-08-15 23:10:39 +02:00
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return fmt.Errorf("missing parameters")
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2021-04-28 16:15:45 +02:00
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}
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return nil
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},
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Run: func(cmd *cobra.Command, args []string) {
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2021-04-30 00:23:26 +02:00
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n, err := cmd.Flags().GetString("namespace")
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if err != nil {
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log.Fatalf("Error getting namespace: %s", err)
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}
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2021-05-08 13:28:22 +02:00
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o, _ := cmd.Flags().GetString("output")
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2021-04-30 00:23:26 +02:00
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2021-04-28 16:15:45 +02:00
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h, err := getHeadscaleApp()
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if err != nil {
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log.Fatalf("Error initializing: %s", err)
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}
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2021-05-08 13:28:22 +02:00
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m, err := h.RegisterMachine(args[0], n)
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if strings.HasPrefix(o, "json") {
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2021-05-08 17:06:36 +02:00
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JsonOutput(m, err, o)
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2021-05-08 13:28:22 +02:00
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return
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}
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2021-04-28 16:15:45 +02:00
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if err != nil {
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2021-05-08 13:28:22 +02:00
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fmt.Printf("Cannot register machine: %s\n", err)
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2021-04-28 16:15:45 +02:00
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return
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}
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2021-05-08 13:28:22 +02:00
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fmt.Printf("Machine registered\n")
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2021-04-28 16:15:45 +02:00
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},
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}
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2021-07-25 15:04:06 +02:00
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var listNodesCmd = &cobra.Command{
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2021-05-01 20:00:25 +02:00
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Use: "list",
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Short: "List the nodes in a given namespace",
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Run: func(cmd *cobra.Command, args []string) {
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n, err := cmd.Flags().GetString("namespace")
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if err != nil {
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log.Fatalf("Error getting namespace: %s", err)
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}
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2021-05-08 13:58:51 +02:00
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o, _ := cmd.Flags().GetString("output")
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2021-05-01 20:00:25 +02:00
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h, err := getHeadscaleApp()
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if err != nil {
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log.Fatalf("Error initializing: %s", err)
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}
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machines, err := h.ListMachinesInNamespace(n)
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2021-05-08 13:58:51 +02:00
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if strings.HasPrefix(o, "json") {
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2021-05-08 17:06:36 +02:00
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JsonOutput(machines, err, o)
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2021-05-08 13:58:51 +02:00
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return
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}
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2021-05-01 20:00:25 +02:00
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if err != nil {
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log.Fatalf("Error getting nodes: %s", err)
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}
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2021-08-15 23:10:39 +02:00
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d, err := nodesToPtables(*machines)
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if err != nil {
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log.Fatalf("Error converting to table: %s", err)
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2021-05-01 20:00:25 +02:00
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}
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2021-08-15 23:35:03 +02:00
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err = pterm.DefaultTable.WithHasHeader().WithData(d).Render()
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if err != nil {
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log.Fatal(err)
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}
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2021-05-01 20:00:25 +02:00
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},
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}
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2021-07-17 00:23:12 +02:00
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2021-07-25 15:04:06 +02:00
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var deleteNodeCmd = &cobra.Command{
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2021-07-17 00:23:12 +02:00
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Use: "delete ID",
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Short: "Delete a node",
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Args: func(cmd *cobra.Command, args []string) error {
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if len(args) < 1 {
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2021-08-15 23:10:39 +02:00
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return fmt.Errorf("missing parameters")
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2021-07-17 00:23:12 +02:00
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}
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return nil
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},
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Run: func(cmd *cobra.Command, args []string) {
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h, err := getHeadscaleApp()
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if err != nil {
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log.Fatalf("Error initializing: %s", err)
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}
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id, err := strconv.Atoi(args[0])
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if err != nil {
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log.Fatalf("Error converting ID to integer: %s", err)
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}
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m, err := h.GetMachineByID(uint64(id))
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if err != nil {
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log.Fatalf("Error getting node: %s", err)
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}
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2021-07-17 11:09:42 +02:00
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confirm := false
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prompt := &survey.Confirm{
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Message: fmt.Sprintf("Do you want to remove the node %s?", m.Name),
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}
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2021-07-17 11:17:42 +02:00
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err = survey.AskOne(prompt, &confirm)
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if err != nil {
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return
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}
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2021-07-17 11:09:42 +02:00
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if confirm {
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err = h.DeleteMachine(m)
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if err != nil {
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log.Fatalf("Error deleting node: %s", err)
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}
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fmt.Printf("Node deleted\n")
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} else {
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fmt.Printf("Node not deleted\n")
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2021-07-17 00:23:12 +02:00
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}
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},
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}
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2021-08-15 23:10:39 +02:00
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func nodesToPtables(m []headscale.Machine) (pterm.TableData, error) {
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d := pterm.TableData{{"ID", "Name", "NodeKey", "IP address", "Ephemeral", "Last seen", "Online"}}
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for _, m := range m {
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var ephemeral bool
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if m.AuthKey != nil && m.AuthKey.Ephemeral {
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ephemeral = true
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}
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var lastSeen time.Time
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if m.LastSeen != nil {
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lastSeen = *m.LastSeen
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}
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nKey, err := wgkey.ParseHex(m.NodeKey)
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if err != nil {
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return nil, err
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}
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nodeKey := tailcfg.NodeKey(nKey)
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var online string
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if m.LastSeen.After(time.Now().Add(-5 * time.Minute)) { // TODO: Find a better way to reliably show if online
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online = pterm.LightGreen("true")
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} else {
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online = pterm.LightRed("false")
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}
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d = append(d, []string{strconv.FormatUint(m.ID, 10), m.Name, nodeKey.ShortString(), m.IPAddress, strconv.FormatBool(ephemeral), lastSeen.Format("2006-01-02 15:04:05"), online})
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}
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return d, nil
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}
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