func usageFor(fs *flag.FlagSet, usage string) func() {
return func() {
var b bytes.Buffer
b.WriteString(ansi.Bold("Usage:") + "\n " + usage + "\n")
var options [][]string
fs.VisitAll(func(f *flag.Flag) {
var opt = " -" + f.Name
if f.DefValue != "false" {
opt += "=" + f.DefValue
}
options = append(options, []string{opt, f.Usage})
})
if len(options) > 0 {
b.WriteString("\n" + ansi.Bold("Options:") + "\n")
optionTable(&b, options)
}
fmt.Println(b.String())
}
}
func lazySetupPrefixes() {
if prefix == nil {
if !loggingEnabled {
panic("attempting setup before logging enabled")
}
prefix = map[string]string{
"debug": ansi.Magenta("debug "),
// info has no prefix
"ok": ansi.Bold(ansi.Green("ok ")),
"warning": ansi.Bold(ansi.Yellow("warning ")),
"fatal": ansi.Bold(ansi.Red("fatal ")),
}
}
}
func tableFormatter(cell string, row, col, flags int) string {
if row == 0 {
return ansi.Underline(cell)
} else if col == 0 {
return ansi.Bold(ansi.Cyan(cell))
} else if col == 1 && (strings.HasSuffix(cell, "U") || strings.HasSuffix(cell, "E")) {
return ansi.Red(cell)
} else if flags&table.Truncated != 0 {
return cell[:len(cell)-1] + ansi.Red(">")
}
return cell
}
func mainUsage(w io.Writer) {
tw := tabwriter.NewWriter(w, 2, 4, 2, ' ', 0)
fmt.Fprintln(w, ansi.Bold("Commands:"))
var cmds []string
for _, cmd := range commandList {
cmds = append(cmds, cmd.name)
}
sort.Strings(cmds)
for _, name := range cmds {
cmd := commandMap[name]
if sn := cmd.descr; sn != "" {
alias := ""
// Ignore undocumented commands
if len(cmd.aliases) > 0 {
alias = " (" + strings.Join(cmd.aliases, ", ") + ")"
}
tw.Write([]byte(fmt.Sprintf(" %s%s\t%s\n", ansi.Bold(ansi.Cyan(name)), ansi.Cyan(alias), sn)))
}
}
tw.Flush()
fmt.Fprintln(w, "\n Commands can be abbreviated to their unique prefix.\n")
fmt.Fprintln(w, ansi.Bold("Examples:"))
examples := [][]string{
{" mole ls", "# show all available tunnels"},
{" mole l foo", "# show all available tunnels matching the regexp \"foo\""},
{" mole show foo", "# show the hosts and forwards in the tunnel \"foo\""},
{" sudo mole dig foo", "# dig the tunnel \"foo\""},
{" sudo mole -d d foo", "# dig the tunnel \"foo\", while showing debug output"},
{" mole push foo.ini", "# create or update the \"foo\" tunnel from a local file"},
{" mole install", "# list packages available for installation"},
{" mole ins vpnc", "# install a package named vpnc"},
{" mole up -force", "# perform a forced up/downgrade to the server version"},
}
optionTable(w, examples)
w.Write([]byte("\n"))
}
func commandLs(args []string) {
fs := flag.NewFlagSet("ls", flag.ContinueOnError)
short := fs.Bool("s", false, "Short listing")
long := fs.Bool("l", false, "Long listing")
fs.Usage = usageFor(fs, msgLsUsage)
err := fs.Parse(args)
if err != nil {
fmt.Println(ansi.Bold("Feature Flags:"))
fmt.Println(msgLsFlags)
exit(3)
}
args = fs.Args()
var re *regexp.Regexp
if len(args) == 1 {
re, err = regexp.Compile("(?i)" + args[0])
fatalErr(err)
}
cl := NewClient(serverAddress(), moleIni.Get("server", "fingerprint"))
res, err := authenticated(cl, func() (interface{}, error) { return cl.List() })
fatalErr(err)
l := res.([]ListItem)
var rows [][]string
var header []string
var format string
var hasFeatureFlags bool
for _, i := range l {
if i.Features != 0 {
hasFeatureFlags = true
break
}
}
if hasFeatureFlags {
header = []string{"TUNNEL", "FLAGS", "DESCRIPTION"}
format = "lll"
} else {
header = []string{"TUNNEL", "DESCRIPTION"}
format = "ll"
}
if *long {
header = append(header, "HOSTS", "VER")
format += "lr"
}
rows = [][]string{header}
tunnelCache, _ := os.Create(path.Join(homeDir, "tunnels.cache"))
var matched int
for _, i := range l {
hosts := strings.Join(i.Hosts, ", ")
if re == nil || re.MatchString(i.Name) || re.MatchString(i.Description) || re.MatchString(hosts) {
if tunnelCache != nil {
fmt.Fprintln(tunnelCache, i.Name)
}
if *short {
fmt.Println(i.Name)
} else {
matched++
row := []string{i.Name}
if hasFeatureFlags {
flags := ""
spacer := "·"
unsupported := i.Features & ^(conf.FeatureError|conf.FeatureSshKey|conf.FeatureSshPassword|conf.FeatureLocalOnly|conf.FeatureVpnc|conf.FeatureOpenConnect|conf.FeatureSocks) != 0
if i.Features&conf.FeatureError != 0 {
flags = strings.Repeat(spacer, 4) + "E"
} else {
if i.Features&conf.FeatureVpnc != 0 {
flags += "v"
unsupported = unsupported || !supportsVpn("vpnc")
} else if i.Features&conf.FeatureOpenConnect != 0 {
flags += "o"
unsupported = unsupported || !supportsVpn("openconnect")
} else {
flags += spacer
}
if i.Features&conf.FeatureSshKey != 0 {
flags += "k"
} else {
flags += spacer
}
if i.Features&conf.FeatureSshPassword != 0 {
flags += "p"
} else {
flags += spacer
}
if i.Features&conf.FeatureSocks != 0 {
flags += "s"
} else if i.Features&conf.FeatureLocalOnly != 0 {
flags += "l"
} else {
flags += spacer
}
if unsupported {
flags += "U"
} else {
flags += spacer
}
}
row = append(row, flags)
}
row = append(row, i.Description)
if *long {
ver := fmt.Sprintf("%.01f", i.Version)
if hosts == "" {
hosts = "-"
}
row = append(row, hosts, ver)
}
rows = append(rows, row)
}
}
}
if tunnelCache != nil {
_ = tunnelCache.Close()
}
if !*short {
// Never prefix table with log stuff
fmt.Printf(table.FmtFunc(format, rows, tableFormatter))
if matched != len(l) {
fmt.Printf(ansi.Faint(" - Matched %d out of %d records\n"), matched, len(l))
}
}
}
func shell(fwdChan chan<- conf.ForwardLine, cfg *conf.Config, dialer Dialer) {
help := func() {
infoln("Available commands:")
infoln(" help, ? - show help")
infoln(" quit, ^D - stop forwarding and exit")
infoln(" test - test each forward for connection")
infoln(" stat - show forwarding statistics")
infoln(" debug - enable debugging")
infoln(" fwd srcip:srcport dstip:dstport - add forward")
}
term := liner.NewLiner()
atExit(func() {
term.Close()
})
// Receive commands
commands := make(chan string)
next := make(chan bool)
go func() {
for {
prompt := "mole> "
if debugEnabled {
prompt = "(debug) mole> "
}
cmd, err := term.Prompt(prompt)
if err == io.EOF {
fmt.Println("quit")
commands <- "quit"
return
}
if cmd != "" {
commands <- cmd
term.AppendHistory(cmd)
_, ok := <-next
if !ok {
return
}
}
}
}()
// Catch ^C and treat as "quit" command
sigchan := make(chan os.Signal, 1)
signal.Notify(sigchan, os.Interrupt)
go func() {
<-sigchan
fmt.Println("quit")
commands <- "quit"
}()
// Handle commands
for {
cmd := <-commands
parts := strings.SplitN(cmd, " ", -1)
switch parts[0] {
case "quit":
close(next)
return
case "help", "?":
help()
case "stat":
printStats()
case "test":
results := testForwards(dialer, cfg)
for res := range results {
infof(ansi.Bold(ansi.Cyan(res.name)))
for _, line := range res.results {
if line.err == nil {
infof("%22s %s in %.02f ms", line.dst, ansi.Bold(ansi.Green("-ok-")), line.ms)
} else {
infof("%22s %s in %.02f ms (%s)", line.dst, ansi.Bold(ansi.Red("fail")), line.ms, line.err)
}
}
}
case "debug":
infoln(msgDebugEnabled)
debugEnabled = true
case "fwd":
if len(parts) != 3 {
warnf(msgErrIncorrectFwd, cmd)
break
}
src := strings.SplitN(parts[1], ":", 2)
if len(src) != 2 {
warnf(msgErrIncorrectFwdSrc, parts[1])
break
}
var ipExists bool
for _, ip := range currentAddresses() {
if ip == src[0] {
ipExists = true
break
}
}
if !ipExists {
warnf(msgErrIncorrectFwdIP, src[0])
break
}
dst := strings.SplitN(parts[2], ":", 2)
if len(dst) != 2 {
warnf(msgErrIncorrectFwdDst, parts[2])
break
}
srcp, err := strconv.Atoi(src[1])
if err != nil {
warnln(err)
break
}
if srcp < 1024 {
warnf(msgErrIncorrectFwdPriv, srcp)
break
}
dstp, err := strconv.Atoi(dst[1])
if err != nil {
warnln(err)
break
}
fwd := conf.ForwardLine{
SrcIP: src[0],
SrcPort: srcp,
DstIP: dst[0],
DstPort: dstp,
}
okln("add", fwd)
fwdChan <- fwd
default:
warnf(msgErrNoSuchCommand, parts[0])
}
next <- true
}
}