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Implements netstat in Talos API and client (talosctl). Signed-off-by: Nico Berlee <nico.berlee@on2it.net> Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,255 @@ | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
|
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||
| package talos | ||
|
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||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "os" | ||
| "strconv" | ||
| "strings" | ||
| "text/tabwriter" | ||
|
|
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| "github.com/spf13/cobra" | ||
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| "github.com/siderolabs/talos/pkg/cli" | ||
| "github.com/siderolabs/talos/pkg/machinery/api/machine" | ||
| "github.com/siderolabs/talos/pkg/machinery/client" | ||
| ) | ||
|
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| var netstatCmdFlags struct { | ||
| verbose bool | ||
| extend bool | ||
| pid bool | ||
| timers bool | ||
| listening bool | ||
| all bool | ||
| tcp bool | ||
| udp bool | ||
| udplite bool | ||
| raw bool | ||
| ipv4 bool | ||
| ipv6 bool | ||
| } | ||
|
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| // netstatCmd represents the ls command. | ||
| var netstatCmd = &cobra.Command{ | ||
| Use: "netstat", | ||
| Aliases: []string{"ss"}, | ||
| Short: "Retrieve a socket listing of connections", | ||
| Long: ``, | ||
| Args: cobra.NoArgs, | ||
| RunE: func(cmd *cobra.Command, args []string) error { | ||
| return WithClient(func(ctx context.Context, c *client.Client) error { | ||
| req := netstatFlagsToRequest() | ||
| response, err := c.Netstat(ctx, req) | ||
| if err != nil { | ||
| if response == nil { | ||
| return fmt.Errorf("error getting netstat: %w", err) | ||
| } | ||
|
|
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| cli.Warning("%s", err) | ||
| } | ||
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| err = printNetstat(response) | ||
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| return err | ||
| }) | ||
| }, | ||
| } | ||
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| //nolint:gocyclo | ||
| func netstatFlagsToRequest() *machine.NetstatRequest { | ||
| req := machine.NetstatRequest{ | ||
| Feature: &machine.NetstatRequest_Feature{ | ||
| Pid: netstatCmdFlags.pid, | ||
| }, | ||
| L4Proto: &machine.NetstatRequest_L4Proto{ | ||
| Tcp: netstatCmdFlags.tcp, | ||
| Tcp6: netstatCmdFlags.tcp, | ||
| Udp: netstatCmdFlags.udp, | ||
| Udp6: netstatCmdFlags.udp, | ||
| Udplite: netstatCmdFlags.udplite, | ||
| Udplite6: netstatCmdFlags.udplite, | ||
| Raw: netstatCmdFlags.raw, | ||
| Raw6: netstatCmdFlags.raw, | ||
| }, | ||
| } | ||
|
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| switch { | ||
| case netstatCmdFlags.all: | ||
| req.Filter = machine.NetstatRequest_ALL | ||
| case netstatCmdFlags.listening: | ||
| req.Filter = machine.NetstatRequest_LISTENING | ||
| default: | ||
| req.Filter = machine.NetstatRequest_CONNECTED | ||
| } | ||
|
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| if netstatCmdFlags.verbose { | ||
| req.L4Proto.Tcp = true | ||
| req.L4Proto.Tcp6 = true | ||
| req.L4Proto.Udp = true | ||
| req.L4Proto.Udp6 = true | ||
| req.L4Proto.Udplite = true | ||
| req.L4Proto.Udplite6 = true | ||
| req.L4Proto.Raw = true | ||
| req.L4Proto.Raw6 = true | ||
| } | ||
|
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| if !req.L4Proto.Tcp && !req.L4Proto.Tcp6 && !req.L4Proto.Udp && !req.L4Proto.Udp6 && !req.L4Proto.Udplite && !req.L4Proto.Udplite6 && !req.L4Proto.Raw && !req.L4Proto.Raw6 { | ||
| req.L4Proto.Tcp = true | ||
| req.L4Proto.Tcp6 = true | ||
| req.L4Proto.Udp = true | ||
| req.L4Proto.Udp6 = true | ||
| } | ||
|
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| if netstatCmdFlags.ipv4 && !netstatCmdFlags.ipv6 { | ||
| req.L4Proto.Tcp6 = false | ||
| req.L4Proto.Udp6 = false | ||
| req.L4Proto.Udplite6 = false | ||
| req.L4Proto.Raw6 = false | ||
| } | ||
|
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| if netstatCmdFlags.ipv6 && !netstatCmdFlags.ipv4 { | ||
| req.L4Proto.Tcp = false | ||
| req.L4Proto.Udp = false | ||
| req.L4Proto.Udplite = false | ||
| req.L4Proto.Raw = false | ||
| } | ||
|
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| return &req | ||
| } | ||
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| //nolint:gocyclo | ||
| func printNetstat(response *machine.NetstatResponse) error { | ||
| w := tabwriter.NewWriter(os.Stdout, 0, 0, 3, ' ', 0) | ||
| node := "" | ||
|
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| labels := strings.Join( | ||
| []string{ | ||
| "Proto", | ||
| "Recv-Q", | ||
| "Send-Q", | ||
| "Local Address", | ||
| "Foreign Address", | ||
| "State", | ||
| }, "\t") | ||
|
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| if netstatCmdFlags.extend { | ||
| labels += "\t" + strings.Join( | ||
| []string{ | ||
| "Uid", | ||
| "Inode", | ||
| }, "\t") | ||
| } | ||
|
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| if netstatCmdFlags.pid { | ||
| labels += "\t" + "PID/Program name" | ||
| } | ||
|
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| if netstatCmdFlags.timers { | ||
| labels += "\t" + "Timer" | ||
| } | ||
|
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| for i, message := range response.Messages { | ||
| if message.Metadata != nil && message.Metadata.Hostname != "" { | ||
| node = message.Metadata.Hostname | ||
| } | ||
|
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| if len(message.Connectrecord) == 0 { | ||
| continue | ||
| } | ||
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| for j, record := range message.Connectrecord { | ||
| if i == 0 && j == 0 { | ||
| if node != "" { | ||
| fmt.Fprintln(w, "NODE\t"+labels) | ||
| } else { | ||
| fmt.Fprintln(w, labels) | ||
| } | ||
| } | ||
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| args := []interface{}{} | ||
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| if node != "" { | ||
| args = append(args, node) | ||
| } | ||
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| state := "" | ||
| if record.State != 7 { | ||
| state = record.State.String() | ||
| } | ||
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| args = append(args, []interface{}{ | ||
| record.L4Proto, | ||
| strconv.FormatUint(record.Rxqueue, 10), | ||
| strconv.FormatUint(record.Txqueue, 10), | ||
| fmt.Sprintf("%s:%d", record.Localip, record.Localport), | ||
| fmt.Sprintf("%s:%s", record.Remoteip, wildcardIfZero(record.Remoteport)), | ||
| state, | ||
| }...) | ||
|
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| if netstatCmdFlags.extend { | ||
| args = append(args, []interface{}{ | ||
| strconv.FormatUint(uint64(record.Uid), 10), | ||
| strconv.FormatUint(record.Inode, 10), | ||
| }...) | ||
| } | ||
|
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| if netstatCmdFlags.pid { | ||
| if record.Process.Pid != 0 { | ||
| args = append(args, []interface{}{ | ||
| fmt.Sprintf("%d/%s", record.Process.Pid, record.Process.Name), | ||
| }...) | ||
| } else { | ||
| args = append(args, []interface{}{ | ||
| "-", | ||
| }...) | ||
| } | ||
| } | ||
|
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| if netstatCmdFlags.timers { | ||
| timerwhen := strconv.FormatFloat(float64(record.Timerwhen)/100, 'f', 2, 64) | ||
|
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| args = append(args, []interface{}{ | ||
| fmt.Sprintf("%s (%s/%d/%d)", strings.ToLower(record.Tr.String()), timerwhen, record.Retrnsmt, record.Timeout), | ||
| }...) | ||
| } | ||
|
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| pattern := strings.Repeat("%s\t", len(args)) | ||
| pattern = strings.TrimSpace(pattern) + "\n" | ||
|
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| fmt.Fprintf(w, pattern, args...) | ||
| } | ||
| } | ||
|
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| return w.Flush() | ||
| } | ||
|
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| func wildcardIfZero(num uint32) string { | ||
| if num == 0 { | ||
| return "*" | ||
| } | ||
|
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| return strconv.FormatUint(uint64(num), 10) | ||
| } | ||
|
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| func init() { | ||
| netstatCmd.Flags().BoolVarP(&netstatCmdFlags.verbose, "verbose", "v", false, "display sockets of all supported transport protocols") | ||
| // extend is normally -e but cannot be used as this is endpoint in talosctl | ||
| netstatCmd.Flags().BoolVarP(&netstatCmdFlags.extend, "extend", "x", false, "show detailed socket information") | ||
| netstatCmd.Flags().BoolVarP(&netstatCmdFlags.pid, "programs", "p", false, "show process using socket") | ||
| netstatCmd.Flags().BoolVarP(&netstatCmdFlags.timers, "timers", "o", false, "display timers") | ||
| netstatCmd.Flags().BoolVarP(&netstatCmdFlags.listening, "listening", "l", false, "display listening server sockets") | ||
| netstatCmd.Flags().BoolVarP(&netstatCmdFlags.all, "all", "a", false, "display all sockets states (default: connected)") | ||
| netstatCmd.Flags().BoolVarP(&netstatCmdFlags.tcp, "tcp", "t", false, "display only TCP sockets") | ||
| netstatCmd.Flags().BoolVarP(&netstatCmdFlags.udp, "udp", "u", false, "display only UDP sockets") | ||
| netstatCmd.Flags().BoolVarP(&netstatCmdFlags.udplite, "udplite", "U", false, "display only UDPLite sockets") | ||
| netstatCmd.Flags().BoolVarP(&netstatCmdFlags.raw, "raw", "w", false, "display only RAW sockets") | ||
| netstatCmd.Flags().BoolVarP(&netstatCmdFlags.ipv4, "ipv4", "4", false, "display only ipv4 sockets") | ||
| netstatCmd.Flags().BoolVarP(&netstatCmdFlags.ipv4, "ipv6", "6", false, "display only ipv6 sockets") | ||
|
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| addCommand(netstatCmd) | ||
| } |
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