nebula/ssh.go

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package nebula
import (
"bytes"
"encoding/json"
"errors"
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"flag"
"fmt"
"net"
"os"
"reflect"
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"runtime"
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"runtime/pprof"
"sort"
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"strconv"
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"strings"
"github.com/sirupsen/logrus"
"github.com/slackhq/nebula/config"
"github.com/slackhq/nebula/header"
"github.com/slackhq/nebula/iputil"
"github.com/slackhq/nebula/sshd"
"github.com/slackhq/nebula/udp"
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)
type sshListHostMapFlags struct {
Json bool
Pretty bool
ByIndex bool
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}
type sshPrintCertFlags struct {
Json bool
Pretty bool
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Raw bool
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}
type sshPrintTunnelFlags struct {
Pretty bool
}
type sshChangeRemoteFlags struct {
Address string
}
type sshCloseTunnelFlags struct {
LocalOnly bool
}
type sshCreateTunnelFlags struct {
Address string
}
func wireSSHReload(l *logrus.Logger, ssh *sshd.SSHServer, c *config.C) {
c.RegisterReloadCallback(func(c *config.C) {
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if c.GetBool("sshd.enabled", false) {
sshRun, err := configSSH(l, ssh, c)
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if err != nil {
l.WithError(err).Error("Failed to reconfigure the sshd")
ssh.Stop()
}
if sshRun != nil {
go sshRun()
}
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} else {
ssh.Stop()
}
})
}
// configSSH reads the ssh info out of the passed-in Config and
// updates the passed-in SSHServer. On success, it returns a function
// that callers may invoke to run the configured ssh server. On
// failure, it returns nil, error.
func configSSH(l *logrus.Logger, ssh *sshd.SSHServer, c *config.C) (func(), error) {
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//TODO conntrack list
//TODO print firewall rules or hash?
listen := c.GetString("sshd.listen", "")
if listen == "" {
return nil, fmt.Errorf("sshd.listen must be provided")
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}
_, port, err := net.SplitHostPort(listen)
if err != nil {
return nil, fmt.Errorf("invalid sshd.listen address: %s", err)
}
if port == "22" {
return nil, fmt.Errorf("sshd.listen can not use port 22")
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}
//TODO: no good way to reload this right now
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hostKeyPathOrKey := c.GetString("sshd.host_key", "")
if hostKeyPathOrKey == "" {
return nil, fmt.Errorf("sshd.host_key must be provided")
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}
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var hostKeyBytes []byte
if strings.Contains(hostKeyPathOrKey, "-----BEGIN") {
hostKeyBytes = []byte(hostKeyPathOrKey)
} else {
hostKeyBytes, err = os.ReadFile(hostKeyPathOrKey)
if err != nil {
return nil, fmt.Errorf("error while loading sshd.host_key file: %s", err)
}
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}
err = ssh.SetHostKey(hostKeyBytes)
if err != nil {
return nil, fmt.Errorf("error while adding sshd.host_key: %s", err)
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}
rawKeys := c.Get("sshd.authorized_users")
keys, ok := rawKeys.([]interface{})
if ok {
for _, rk := range keys {
kDef, ok := rk.(map[interface{}]interface{})
if !ok {
l.WithField("sshKeyConfig", rk).Warn("Authorized user had an error, ignoring")
continue
}
user, ok := kDef["user"].(string)
if !ok {
l.WithField("sshKeyConfig", rk).Warn("Authorized user is missing the user field")
continue
}
k := kDef["keys"]
switch v := k.(type) {
case string:
err := ssh.AddAuthorizedKey(user, v)
if err != nil {
l.WithError(err).WithField("sshKeyConfig", rk).WithField("sshKey", v).Warn("Failed to authorize key")
continue
}
case []interface{}:
for _, subK := range v {
sk, ok := subK.(string)
if !ok {
l.WithField("sshKeyConfig", rk).WithField("sshKey", subK).Warn("Did not understand ssh key")
continue
}
err := ssh.AddAuthorizedKey(user, sk)
if err != nil {
l.WithError(err).WithField("sshKeyConfig", sk).Warn("Failed to authorize key")
continue
}
}
default:
l.WithField("sshKeyConfig", rk).Warn("Authorized user is missing the keys field or was not understood")
}
}
} else {
l.Info("no ssh users to authorize")
}
var runner func()
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if c.GetBool("sshd.enabled", false) {
ssh.Stop()
runner = func() {
if err := ssh.Run(listen); err != nil {
l.WithField("err", err).Warn("Failed to run the SSH server")
}
}
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} else {
ssh.Stop()
}
return runner, nil
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}
func attachCommands(l *logrus.Logger, c *config.C, ssh *sshd.SSHServer, f *Interface) {
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ssh.RegisterCommand(&sshd.Command{
Name: "list-hostmap",
ShortDescription: "List all known previously connected hosts",
Flags: func() (*flag.FlagSet, interface{}) {
fl := flag.NewFlagSet("", flag.ContinueOnError)
s := sshListHostMapFlags{}
fl.BoolVar(&s.Json, "json", false, "outputs as json with more information")
fl.BoolVar(&s.Pretty, "pretty", false, "pretty prints json, assumes -json")
fl.BoolVar(&s.ByIndex, "by-index", false, "gets all hosts in the hostmap from the index table")
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return fl, &s
},
Callback: func(fs interface{}, a []string, w sshd.StringWriter) error {
return sshListHostMap(f.hostMap, fs, w)
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},
})
ssh.RegisterCommand(&sshd.Command{
Name: "list-pending-hostmap",
ShortDescription: "List all handshaking hosts",
Flags: func() (*flag.FlagSet, interface{}) {
fl := flag.NewFlagSet("", flag.ContinueOnError)
s := sshListHostMapFlags{}
fl.BoolVar(&s.Json, "json", false, "outputs as json with more information")
fl.BoolVar(&s.Pretty, "pretty", false, "pretty prints json, assumes -json")
fl.BoolVar(&s.ByIndex, "by-index", false, "gets all hosts in the hostmap from the index table")
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return fl, &s
},
Callback: func(fs interface{}, a []string, w sshd.StringWriter) error {
return sshListHostMap(f.handshakeManager, fs, w)
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},
})
ssh.RegisterCommand(&sshd.Command{
Name: "list-lighthouse-addrmap",
ShortDescription: "List all lighthouse map entries",
Flags: func() (*flag.FlagSet, interface{}) {
fl := flag.NewFlagSet("", flag.ContinueOnError)
s := sshListHostMapFlags{}
fl.BoolVar(&s.Json, "json", false, "outputs as json with more information")
fl.BoolVar(&s.Pretty, "pretty", false, "pretty prints json, assumes -json")
return fl, &s
},
Callback: func(fs interface{}, a []string, w sshd.StringWriter) error {
return sshListLighthouseMap(f.lightHouse, fs, w)
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},
})
ssh.RegisterCommand(&sshd.Command{
Name: "reload",
ShortDescription: "Reloads configuration from disk, same as sending HUP to the process",
Callback: func(fs interface{}, a []string, w sshd.StringWriter) error {
return sshReload(c, w)
},
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})
ssh.RegisterCommand(&sshd.Command{
Name: "start-cpu-profile",
ShortDescription: "Starts a cpu profile and write output to the provided file",
Callback: sshStartCpuProfile,
})
ssh.RegisterCommand(&sshd.Command{
Name: "stop-cpu-profile",
ShortDescription: "Stops a cpu profile and writes output to the previously provided file",
Callback: func(fs interface{}, a []string, w sshd.StringWriter) error {
pprof.StopCPUProfile()
return w.WriteLine("If a CPU profile was running it is now stopped")
},
})
ssh.RegisterCommand(&sshd.Command{
Name: "save-heap-profile",
ShortDescription: "Saves a heap profile to the provided path",
Callback: sshGetHeapProfile,
})
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ssh.RegisterCommand(&sshd.Command{
Name: "mutex-profile-fraction",
ShortDescription: "Gets or sets runtime.SetMutexProfileFraction",
Callback: sshMutexProfileFraction,
})
ssh.RegisterCommand(&sshd.Command{
Name: "save-mutex-profile",
ShortDescription: "Saves a mutex profile to the provided path",
Callback: sshGetMutexProfile,
})
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ssh.RegisterCommand(&sshd.Command{
Name: "log-level",
ShortDescription: "Gets or sets the current log level",
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Callback: func(fs interface{}, a []string, w sshd.StringWriter) error {
return sshLogLevel(l, fs, a, w)
},
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})
ssh.RegisterCommand(&sshd.Command{
Name: "log-format",
ShortDescription: "Gets or sets the current log format",
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Callback: func(fs interface{}, a []string, w sshd.StringWriter) error {
return sshLogFormat(l, fs, a, w)
},
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})
ssh.RegisterCommand(&sshd.Command{
Name: "version",
ShortDescription: "Prints the currently running version of nebula",
Callback: func(fs interface{}, a []string, w sshd.StringWriter) error {
return sshVersion(f, fs, a, w)
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},
})
ssh.RegisterCommand(&sshd.Command{
Name: "print-cert",
ShortDescription: "Prints the current certificate being used or the certificate for the provided vpn ip",
Flags: func() (*flag.FlagSet, interface{}) {
fl := flag.NewFlagSet("", flag.ContinueOnError)
s := sshPrintCertFlags{}
fl.BoolVar(&s.Json, "json", false, "outputs as json")
fl.BoolVar(&s.Pretty, "pretty", false, "pretty prints json, assumes -json")
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fl.BoolVar(&s.Raw, "raw", false, "raw prints the PEM encoded certificate, not compatible with -json or -pretty")
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return fl, &s
},
Callback: func(fs interface{}, a []string, w sshd.StringWriter) error {
return sshPrintCert(f, fs, a, w)
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},
})
ssh.RegisterCommand(&sshd.Command{
Name: "print-tunnel",
ShortDescription: "Prints json details about a tunnel for the provided vpn ip",
Flags: func() (*flag.FlagSet, interface{}) {
fl := flag.NewFlagSet("", flag.ContinueOnError)
s := sshPrintTunnelFlags{}
fl.BoolVar(&s.Pretty, "pretty", false, "pretty prints json")
return fl, &s
},
Callback: func(fs interface{}, a []string, w sshd.StringWriter) error {
return sshPrintTunnel(f, fs, a, w)
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},
})
ssh.RegisterCommand(&sshd.Command{
Name: "print-relays",
ShortDescription: "Prints json details about all relay info",
Flags: func() (*flag.FlagSet, interface{}) {
fl := flag.NewFlagSet("", flag.ContinueOnError)
s := sshPrintTunnelFlags{}
fl.BoolVar(&s.Pretty, "pretty", false, "pretty prints json")
return fl, &s
},
Callback: func(fs interface{}, a []string, w sshd.StringWriter) error {
return sshPrintRelays(f, fs, a, w)
},
})
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ssh.RegisterCommand(&sshd.Command{
Name: "change-remote",
ShortDescription: "Changes the remote address used in the tunnel for the provided vpn ip",
Flags: func() (*flag.FlagSet, interface{}) {
fl := flag.NewFlagSet("", flag.ContinueOnError)
s := sshChangeRemoteFlags{}
fl.StringVar(&s.Address, "address", "", "The new remote address, ip:port")
return fl, &s
},
Callback: func(fs interface{}, a []string, w sshd.StringWriter) error {
return sshChangeRemote(f, fs, a, w)
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},
})
ssh.RegisterCommand(&sshd.Command{
Name: "close-tunnel",
ShortDescription: "Closes a tunnel for the provided vpn ip",
Flags: func() (*flag.FlagSet, interface{}) {
fl := flag.NewFlagSet("", flag.ContinueOnError)
s := sshCloseTunnelFlags{}
fl.BoolVar(&s.LocalOnly, "local-only", false, "Disables notifying the remote that the tunnel is shutting down")
return fl, &s
},
Callback: func(fs interface{}, a []string, w sshd.StringWriter) error {
return sshCloseTunnel(f, fs, a, w)
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},
})
ssh.RegisterCommand(&sshd.Command{
Name: "create-tunnel",
ShortDescription: "Creates a tunnel for the provided vpn ip and address",
Help: "The lighthouses will be queried for real addresses but you can provide one as well.",
Flags: func() (*flag.FlagSet, interface{}) {
fl := flag.NewFlagSet("", flag.ContinueOnError)
s := sshCreateTunnelFlags{}
fl.StringVar(&s.Address, "address", "", "Optionally provide a real remote address, ip:port ")
return fl, &s
},
Callback: func(fs interface{}, a []string, w sshd.StringWriter) error {
return sshCreateTunnel(f, fs, a, w)
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},
})
ssh.RegisterCommand(&sshd.Command{
Name: "query-lighthouse",
ShortDescription: "Query the lighthouses for the provided vpn ip",
Help: "This command is asynchronous. Only currently known udp ips will be printed.",
Callback: func(fs interface{}, a []string, w sshd.StringWriter) error {
return sshQueryLighthouse(f, fs, a, w)
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},
})
}
func sshListHostMap(hl controlHostLister, a interface{}, w sshd.StringWriter) error {
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fs, ok := a.(*sshListHostMapFlags)
if !ok {
//TODO: error
return nil
}
var hm []ControlHostInfo
if fs.ByIndex {
hm = listHostMapIndexes(hl)
} else {
hm = listHostMapHosts(hl)
}
sort.Slice(hm, func(i, j int) bool {
return bytes.Compare(hm[i].VpnIp, hm[j].VpnIp) < 0
})
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if fs.Json || fs.Pretty {
js := json.NewEncoder(w.GetWriter())
if fs.Pretty {
js.SetIndent("", " ")
}
err := js.Encode(hm)
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if err != nil {
//TODO
return nil
}
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} else {
for _, v := range hm {
err := w.WriteLine(fmt.Sprintf("%s: %s", v.VpnIp, v.RemoteAddrs))
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if err != nil {
return err
}
}
}
return nil
}
func sshListLighthouseMap(lightHouse *LightHouse, a interface{}, w sshd.StringWriter) error {
fs, ok := a.(*sshListHostMapFlags)
if !ok {
//TODO: error
return nil
}
type lighthouseInfo struct {
VpnIp string `json:"vpnIp"`
Addrs *CacheMap `json:"addrs"`
}
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lightHouse.RLock()
addrMap := make([]lighthouseInfo, len(lightHouse.addrMap))
x := 0
for k, v := range lightHouse.addrMap {
addrMap[x] = lighthouseInfo{
VpnIp: k.String(),
Addrs: v.CopyCache(),
}
x++
}
lightHouse.RUnlock()
sort.Slice(addrMap, func(i, j int) bool {
return strings.Compare(addrMap[i].VpnIp, addrMap[j].VpnIp) < 0
})
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if fs.Json || fs.Pretty {
js := json.NewEncoder(w.GetWriter())
if fs.Pretty {
js.SetIndent("", " ")
}
err := js.Encode(addrMap)
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if err != nil {
//TODO
return nil
}
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} else {
for _, v := range addrMap {
b, err := json.Marshal(v.Addrs)
if err != nil {
return err
}
err = w.WriteLine(fmt.Sprintf("%s: %s", v.VpnIp, string(b)))
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if err != nil {
return err
}
}
}
return nil
}
func sshStartCpuProfile(fs interface{}, a []string, w sshd.StringWriter) error {
if len(a) == 0 {
err := w.WriteLine("No path to write profile provided")
return err
}
file, err := os.Create(a[0])
if err != nil {
err = w.WriteLine(fmt.Sprintf("Unable to create profile file: %s", err))
return err
}
err = pprof.StartCPUProfile(file)
if err != nil {
err = w.WriteLine(fmt.Sprintf("Unable to start cpu profile: %s", err))
return err
}
err = w.WriteLine(fmt.Sprintf("Started cpu profile, issue stop-cpu-profile to write the output to %s", a))
return err
}
func sshVersion(ifce *Interface, fs interface{}, a []string, w sshd.StringWriter) error {
return w.WriteLine(fmt.Sprintf("%s", ifce.version))
}
func sshQueryLighthouse(ifce *Interface, fs interface{}, a []string, w sshd.StringWriter) error {
if len(a) == 0 {
return w.WriteLine("No vpn ip was provided")
}
parsedIp := net.ParseIP(a[0])
if parsedIp == nil {
return w.WriteLine(fmt.Sprintf("The provided vpn ip could not be parsed: %s", a[0]))
}
vpnIp := iputil.Ip2VpnIp(parsedIp)
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if vpnIp == 0 {
return w.WriteLine(fmt.Sprintf("The provided vpn ip could not be parsed: %s", a[0]))
}
var cm *CacheMap
rl := ifce.lightHouse.Query(vpnIp)
if rl != nil {
cm = rl.CopyCache()
}
return json.NewEncoder(w.GetWriter()).Encode(cm)
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}
func sshCloseTunnel(ifce *Interface, fs interface{}, a []string, w sshd.StringWriter) error {
flags, ok := fs.(*sshCloseTunnelFlags)
if !ok {
//TODO: error
return nil
}
if len(a) == 0 {
return w.WriteLine("No vpn ip was provided")
}
parsedIp := net.ParseIP(a[0])
if parsedIp == nil {
return w.WriteLine(fmt.Sprintf("The provided vpn ip could not be parsed: %s", a[0]))
}
vpnIp := iputil.Ip2VpnIp(parsedIp)
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if vpnIp == 0 {
return w.WriteLine(fmt.Sprintf("The provided vpn ip could not be parsed: %s", a[0]))
}
hostInfo := ifce.hostMap.QueryVpnIp(vpnIp)
if hostInfo == nil {
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return w.WriteLine(fmt.Sprintf("Could not find tunnel for vpn ip: %v", a[0]))
}
if !flags.LocalOnly {
ifce.send(
header.CloseTunnel,
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0,
hostInfo.ConnectionState,
hostInfo,
[]byte{},
make([]byte, 12, 12),
make([]byte, mtu),
)
}
ifce.closeTunnel(hostInfo)
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return w.WriteLine("Closed")
}
func sshCreateTunnel(ifce *Interface, fs interface{}, a []string, w sshd.StringWriter) error {
flags, ok := fs.(*sshCreateTunnelFlags)
if !ok {
//TODO: error
return nil
}
if len(a) == 0 {
return w.WriteLine("No vpn ip was provided")
}
parsedIp := net.ParseIP(a[0])
if parsedIp == nil {
return w.WriteLine(fmt.Sprintf("The provided vpn ip could not be parsed: %s", a[0]))
}
vpnIp := iputil.Ip2VpnIp(parsedIp)
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if vpnIp == 0 {
return w.WriteLine(fmt.Sprintf("The provided vpn ip could not be parsed: %s", a[0]))
}
hostInfo := ifce.hostMap.QueryVpnIp(vpnIp)
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if hostInfo != nil {
return w.WriteLine(fmt.Sprintf("Tunnel already exists"))
}
hostInfo = ifce.handshakeManager.QueryVpnIp(vpnIp)
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if hostInfo != nil {
return w.WriteLine(fmt.Sprintf("Tunnel already handshaking"))
}
var addr *udp.Addr
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if flags.Address != "" {
addr = udp.NewAddrFromString(flags.Address)
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if addr == nil {
return w.WriteLine("Address could not be parsed")
}
}
hostInfo = ifce.handshakeManager.StartHandshake(vpnIp, nil)
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if addr != nil {
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hostInfo.SetRemote(addr)
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}
return w.WriteLine("Created")
}
func sshChangeRemote(ifce *Interface, fs interface{}, a []string, w sshd.StringWriter) error {
flags, ok := fs.(*sshChangeRemoteFlags)
if !ok {
//TODO: error
return nil
}
if len(a) == 0 {
return w.WriteLine("No vpn ip was provided")
}
if flags.Address == "" {
return w.WriteLine("No address was provided")
}
addr := udp.NewAddrFromString(flags.Address)
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if addr == nil {
return w.WriteLine("Address could not be parsed")
}
parsedIp := net.ParseIP(a[0])
if parsedIp == nil {
return w.WriteLine(fmt.Sprintf("The provided vpn ip could not be parsed: %s", a[0]))
}
vpnIp := iputil.Ip2VpnIp(parsedIp)
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if vpnIp == 0 {
return w.WriteLine(fmt.Sprintf("The provided vpn ip could not be parsed: %s", a[0]))
}
hostInfo := ifce.hostMap.QueryVpnIp(vpnIp)
if hostInfo == nil {
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return w.WriteLine(fmt.Sprintf("Could not find tunnel for vpn ip: %v", a[0]))
}
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hostInfo.SetRemote(addr)
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return w.WriteLine("Changed")
}
func sshGetHeapProfile(fs interface{}, a []string, w sshd.StringWriter) error {
if len(a) == 0 {
return w.WriteLine("No path to write profile provided")
}
file, err := os.Create(a[0])
if err != nil {
err = w.WriteLine(fmt.Sprintf("Unable to create profile file: %s", err))
return err
}
err = pprof.WriteHeapProfile(file)
if err != nil {
err = w.WriteLine(fmt.Sprintf("Unable to write profile: %s", err))
return err
}
err = w.WriteLine(fmt.Sprintf("Mem profile created at %s", a))
return err
}
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func sshMutexProfileFraction(fs interface{}, a []string, w sshd.StringWriter) error {
if len(a) == 0 {
rate := runtime.SetMutexProfileFraction(-1)
return w.WriteLine(fmt.Sprintf("Current value: %d", rate))
}
newRate, err := strconv.Atoi(a[0])
if err != nil {
return w.WriteLine(fmt.Sprintf("Invalid argument: %s", a[0]))
}
oldRate := runtime.SetMutexProfileFraction(newRate)
return w.WriteLine(fmt.Sprintf("New value: %d. Old value: %d", newRate, oldRate))
}
func sshGetMutexProfile(fs interface{}, a []string, w sshd.StringWriter) error {
if len(a) == 0 {
return w.WriteLine("No path to write profile provided")
}
file, err := os.Create(a[0])
if err != nil {
return w.WriteLine(fmt.Sprintf("Unable to create profile file: %s", err))
}
defer file.Close()
mutexProfile := pprof.Lookup("mutex")
if mutexProfile == nil {
return w.WriteLine("Unable to get pprof.Lookup(\"mutex\")")
}
err = mutexProfile.WriteTo(file, 0)
if err != nil {
return w.WriteLine(fmt.Sprintf("Unable to write profile: %s", err))
}
return w.WriteLine(fmt.Sprintf("Mutex profile created at %s", a))
}
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func sshLogLevel(l *logrus.Logger, fs interface{}, a []string, w sshd.StringWriter) error {
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if len(a) == 0 {
return w.WriteLine(fmt.Sprintf("Log level is: %s", l.Level))
}
level, err := logrus.ParseLevel(a[0])
if err != nil {
return w.WriteLine(fmt.Sprintf("Unknown log level %s. Possible log levels: %s", a, logrus.AllLevels))
}
l.SetLevel(level)
return w.WriteLine(fmt.Sprintf("Log level is: %s", l.Level))
}
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func sshLogFormat(l *logrus.Logger, fs interface{}, a []string, w sshd.StringWriter) error {
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if len(a) == 0 {
return w.WriteLine(fmt.Sprintf("Log format is: %s", reflect.TypeOf(l.Formatter)))
}
logFormat := strings.ToLower(a[0])
switch logFormat {
case "text":
l.Formatter = &logrus.TextFormatter{}
case "json":
l.Formatter = &logrus.JSONFormatter{}
default:
return fmt.Errorf("unknown log format `%s`. possible formats: %s", logFormat, []string{"text", "json"})
}
return w.WriteLine(fmt.Sprintf("Log format is: %s", reflect.TypeOf(l.Formatter)))
}
func sshPrintCert(ifce *Interface, fs interface{}, a []string, w sshd.StringWriter) error {
args, ok := fs.(*sshPrintCertFlags)
if !ok {
//TODO: error
return nil
}
cert := ifce.pki.GetCertState().Certificate
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if len(a) > 0 {
parsedIp := net.ParseIP(a[0])
if parsedIp == nil {
return w.WriteLine(fmt.Sprintf("The provided vpn ip could not be parsed: %s", a[0]))
}
vpnIp := iputil.Ip2VpnIp(parsedIp)
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if vpnIp == 0 {
return w.WriteLine(fmt.Sprintf("The provided vpn ip could not be parsed: %s", a[0]))
}
hostInfo := ifce.hostMap.QueryVpnIp(vpnIp)
if hostInfo == nil {
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return w.WriteLine(fmt.Sprintf("Could not find tunnel for vpn ip: %v", a[0]))
}
cert = hostInfo.GetCert()
}
if args.Json || args.Pretty {
b, err := cert.MarshalJSON()
if err != nil {
//TODO: handle it
return nil
}
if args.Pretty {
buf := new(bytes.Buffer)
err := json.Indent(buf, b, "", " ")
b = buf.Bytes()
if err != nil {
//TODO: handle it
return nil
}
}
return w.WriteBytes(b)
}
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if args.Raw {
b, err := cert.MarshalToPEM()
if err != nil {
//TODO: handle it
return nil
}
return w.WriteBytes(b)
}
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return w.WriteLine(cert.String())
}
func sshPrintRelays(ifce *Interface, fs interface{}, a []string, w sshd.StringWriter) error {
args, ok := fs.(*sshPrintTunnelFlags)
if !ok {
//TODO: error
w.WriteLine(fmt.Sprintf("sshPrintRelays failed to convert args type"))
return nil
}
relays := map[uint32]*HostInfo{}
ifce.hostMap.Lock()
for k, v := range ifce.hostMap.Relays {
relays[k] = v
}
ifce.hostMap.Unlock()
type RelayFor struct {
Error error
Type string
State string
PeerIp iputil.VpnIp
LocalIndex uint32
RemoteIndex uint32
RelayedThrough []iputil.VpnIp
}
type RelayOutput struct {
NebulaIp iputil.VpnIp
RelayForIps []RelayFor
}
type CmdOutput struct {
Relays []*RelayOutput
}
co := CmdOutput{}
enc := json.NewEncoder(w.GetWriter())
if args.Pretty {
enc.SetIndent("", " ")
}
for k, v := range relays {
ro := RelayOutput{NebulaIp: v.vpnIp}
co.Relays = append(co.Relays, &ro)
relayHI := ifce.hostMap.QueryVpnIp(v.vpnIp)
if relayHI == nil {
ro.RelayForIps = append(ro.RelayForIps, RelayFor{Error: errors.New("could not find hostinfo")})
continue
}
for _, vpnIp := range relayHI.relayState.CopyRelayForIps() {
rf := RelayFor{Error: nil}
r, ok := relayHI.relayState.GetRelayForByIp(vpnIp)
if ok {
t := ""
switch r.Type {
case ForwardingType:
t = "forwarding"
case TerminalType:
t = "terminal"
default:
t = "unknown"
}
s := ""
switch r.State {
case Requested:
s = "requested"
case Established:
s = "established"
default:
s = "unknown"
}
rf.LocalIndex = r.LocalIndex
rf.RemoteIndex = r.RemoteIndex
rf.PeerIp = r.PeerIp
rf.Type = t
rf.State = s
if rf.LocalIndex != k {
rf.Error = fmt.Errorf("hostmap LocalIndex '%v' does not match RelayState LocalIndex", k)
}
}
relayedHI := ifce.hostMap.QueryVpnIp(vpnIp)
if relayedHI != nil {
rf.RelayedThrough = append(rf.RelayedThrough, relayedHI.relayState.CopyRelayIps()...)
}
ro.RelayForIps = append(ro.RelayForIps, rf)
}
}
err := enc.Encode(co)
if err != nil {
return err
}
return nil
}
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func sshPrintTunnel(ifce *Interface, fs interface{}, a []string, w sshd.StringWriter) error {
args, ok := fs.(*sshPrintTunnelFlags)
if !ok {
//TODO: error
return nil
}
if len(a) == 0 {
return w.WriteLine("No vpn ip was provided")
}
parsedIp := net.ParseIP(a[0])
if parsedIp == nil {
return w.WriteLine(fmt.Sprintf("The provided vpn ip could not be parsed: %s", a[0]))
}
vpnIp := iputil.Ip2VpnIp(parsedIp)
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if vpnIp == 0 {
return w.WriteLine(fmt.Sprintf("The provided vpn ip could not be parsed: %s", a[0]))
}
hostInfo := ifce.hostMap.QueryVpnIp(vpnIp)
if hostInfo == nil {
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return w.WriteLine(fmt.Sprintf("Could not find tunnel for vpn ip: %v", a[0]))
}
enc := json.NewEncoder(w.GetWriter())
if args.Pretty {
enc.SetIndent("", " ")
}
return enc.Encode(copyHostInfo(hostInfo, ifce.hostMap.GetPreferredRanges()))
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}
func sshReload(c *config.C, w sshd.StringWriter) error {
err := w.WriteLine("Reloading config")
c.ReloadConfig()
return err
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}