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cli.go
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cli.go
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package cli
import (
"net"
"os"
"os/exec"
"os/signal"
"time"
"github.com/op/go-logging"
"github.com/urfave/cli"
"github.com/ziyan/shadowgate/client"
"github.com/ziyan/shadowgate/server"
)
var log = logging.MustGetLogger("cli")
func Run(args []string) {
app := cli.NewApp()
app.EnableBashCompletion = true
app.Name = "ShadowGate"
app.Version = "0.1.0"
app.Usage = "ShadowGate"
app.Flags = []cli.Flag{
cli.StringFlag{
Name: "loglevel",
Value: "INFO",
},
}
app.Before = func(c *cli.Context) error {
logging.SetBackend(logging.NewBackendFormatter(
logging.NewLogBackend(os.Stderr, "", 0),
logging.MustStringFormatter(`%{color}%{time:2006-01-02T15:04:05.000Z07:00} [%{level:.4s}] [%{shortfile} %{shortfunc}] %{message}%{color:reset}`),
))
if level, err := logging.LogLevel(c.String("loglevel")); err == nil {
logging.SetLevel(level, "")
}
if logging.GetLevel("").String() != c.String("loglevel") {
log.Warningf("unknown log level: %s", c.String("loglevel"))
}
log.Debugf("log level set to: %s", logging.GetLevel(""))
return nil
}
app.Commands = []cli.Command{
{
Name: "server",
Usage: "Run in server mode",
Flags: []cli.Flag{
cli.StringFlag{
Name: "ifname",
},
cli.BoolFlag{
Name: "persist",
},
cli.StringFlag{
Name: "ip",
Value: "172.18.0.1/24",
},
cli.StringFlag{
Name: "listen",
Value: ":3389",
},
cli.StringFlag{
Name: "password",
Value: "",
},
cli.StringFlag{
Name: "timeout",
Value: "2s",
},
},
Action: func(c *cli.Context) error {
ip, network, err := net.ParseCIDR(c.String("ip"))
if err != nil {
log.Errorf("failed to parse ip option: %s", err)
return err
}
timeout, err := time.ParseDuration(c.String("timeout"))
if err != nil {
log.Errorf("failed to parse timeout option: %s", err)
return err
}
server, err := server.NewServer(c.String("ifname"), c.Bool("persist"), ip, network, c.String("listen"), []byte(c.String("password")), timeout)
if err != nil {
log.Errorf("failed to start server: %s", err)
return err
}
defer server.Close()
// setup the interface
ipnet := &net.IPNet{ip, network.Mask}
if err := exec.Command("ip", "addr", "add", ipnet.String(), "dev", server.Interface()).Run(); err != nil {
log.Warningf("failed to set addr on interface %s: %s", server.Interface(), err)
}
if err := exec.Command("ip", "link", "set", "dev", server.Interface(), "up").Run(); err != nil {
log.Warningf("failed to bring up interface %s: %s", server.Interface(), err)
}
signaling := make(chan os.Signal, 1)
signal.Notify(signaling, os.Interrupt)
return server.Run(signaling)
},
},
{
Name: "client",
Usage: "Run in client mode",
Flags: []cli.Flag{
cli.StringFlag{
Name: "ifname",
},
cli.BoolFlag{
Name: "persist",
},
cli.StringFlag{
Name: "ip",
Value: "172.18.0.2/24",
},
cli.StringFlag{
Name: "connect",
Value: "127.0.0.1:3389",
},
cli.StringFlag{
Name: "password",
Value: "",
},
cli.StringFlag{
Name: "timeout",
Value: "2s",
},
},
Action: func(c *cli.Context) error {
ip, network, err := net.ParseCIDR(c.String("ip"))
if err != nil {
log.Errorf("failed to parse ip option: %s", err)
return err
}
timeout, err := time.ParseDuration(c.String("timeout"))
if err != nil {
log.Errorf("failed to parse timeout option: %s", err)
return err
}
client, err := client.NewClient(c.String("ifname"), c.Bool("persist"), ip, network, c.String("connect"), []byte(c.String("password")), timeout)
if err != nil {
log.Errorf("failed to start client: %s", err)
return err
}
defer client.Close()
// setup the interface
ipnet := &net.IPNet{ip, network.Mask}
if err := exec.Command("ip", "addr", "add", ipnet.String(), "dev", client.Interface()).Run(); err != nil {
log.Warningf("failed to set addr on interface %s: %s", client.Interface(), err)
}
if err := exec.Command("ip", "link", "set", "dev", client.Interface(), "up").Run(); err != nil {
log.Warningf("failed to bring up interface %s: %s", client.Interface(), err)
}
signaling := make(chan os.Signal, 1)
signal.Notify(signaling, os.Interrupt)
return client.Run(signaling)
},
},
}
app.Run(args)
}