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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| package brook | ||
|
|
||
| import ( | ||
| "errors" | ||
| "fmt" | ||
| "log" | ||
| "net" | ||
| "os" | ||
| "os/signal" | ||
| "syscall" | ||
|
|
||
| "github.com/txthinking/brook/sysproxy" | ||
| "github.com/txthinking/gotun2socks" | ||
| "github.com/txthinking/gotun2socks/tun" | ||
| ) | ||
|
|
||
| // VPN | ||
| type VPN struct { | ||
| Client *Client | ||
| Tunnel *Tunnel | ||
| Tun *gotun2socks.Tun2Socks | ||
| ServerIP string | ||
| TunGateway string | ||
| } | ||
|
|
||
| // NewVPN | ||
| func NewVPN(addr, server, password string, tcpTimeout, tcpDeadline, udpDeadline, udpSessionTime int, tunDevice, tunIP, tunGateway, tunMask string, publicOnly bool) (*VPN, error) { | ||
| h, _, err := net.SplitHostPort(addr) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if h != "127.0.0.1" { | ||
| return nil, errors.New("Must listen on 127.0.0.1") | ||
| } | ||
| h, _, err = net.SplitHostPort(server) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| c, err := NewClient(addr, "127.0.0.1", server, password, tcpTimeout, tcpDeadline, udpDeadline, udpSessionTime) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| tl, err := NewTunnel("127.0.0.1:53", "8.8.8.8:53", server, password, tcpTimeout, tcpDeadline, udpDeadline) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| f, err := tun.OpenTunDevice(tunDevice, tunIP, tunGateway, tunMask, []string{"8.8.8.8"}) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| t := gotun2socks.New(f, addr, []string{"8.8.8.8"}, publicOnly, true) | ||
| return &VPN{ | ||
| Client: c, | ||
| Tunnel: tl, | ||
| Tun: t, | ||
| ServerIP: h, | ||
| TunGateway: tunGateway, | ||
| }, nil | ||
| } | ||
|
|
||
| // ListenAndServe starts to run VPN | ||
| func (v *VPN) ListenAndServe() error { | ||
| if err := sysproxy.SetDNSServer("127.0.0.1"); err != nil { | ||
| return err | ||
| } | ||
| if err := v.AddRoutes(); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| errch := make(chan error) | ||
| go func() { | ||
| errch <- v.Client.ListenAndServe() | ||
| }() | ||
| go func() { | ||
| errch <- v.Tunnel.ListenAndServe() | ||
| }() | ||
| go func() { | ||
| v.Tun.Run() | ||
| }() | ||
| go func() { | ||
| sigs := make(chan os.Signal, 1) | ||
| signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP, syscall.SIGQUIT) | ||
| <-sigs | ||
| errch <- nil | ||
| }() | ||
| fmt.Println("Ctrl-C to quit") | ||
|
|
||
| err := <-errch | ||
| if err := v.Shutdown(); err != nil { | ||
| return err | ||
| } | ||
| return err | ||
| } | ||
|
|
||
| // Shutdown stops VPN | ||
| func (v *VPN) Shutdown() error { | ||
| fmt.Println("Quitting...") | ||
| if err := sysproxy.SetDNSServer("8.8.8.8"); err != nil { | ||
| log.Println(err) | ||
| } | ||
| if err := v.DeleteRoutes(); err != nil { | ||
| log.Println(err) | ||
| } | ||
| if v.Client != nil { | ||
| if err := v.Client.Shutdown(); err != nil { | ||
| log.Println(err) | ||
| } | ||
| } | ||
| if v.Tunnel != nil { | ||
| if err := v.Tunnel.Shutdown(); err != nil { | ||
| log.Println(err) | ||
| } | ||
| } | ||
| if v.Tun != nil { | ||
| v.Tun.Stop() | ||
| } | ||
| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| package brook | ||
|
|
||
| import ( | ||
| "errors" | ||
| "os/exec" | ||
|
|
||
| "github.com/txthinking/brook/sysproxy" | ||
| ) | ||
|
|
||
| // AddRoutes adds routes | ||
| func (v *VPN) AddRoutes() error { | ||
| c := exec.Command("route", "add", "-net", "0.0.0.0", v.TunGateway, "-netmask", "128.0.0.0") | ||
| if out, err := c.CombinedOutput(); err != nil { | ||
| return errors.New(string(out) + err.Error()) | ||
| } | ||
| c = exec.Command("route", "add", "-net", "128.0.0.0", v.TunGateway, "-netmask", "128.0.0.0") | ||
| if out, err := c.CombinedOutput(); err != nil { | ||
| return errors.New(string(out) + err.Error()) | ||
| } | ||
| gw, err := sysproxy.GetDefaultGateway() | ||
| if err != nil { | ||
| return err | ||
| } | ||
| c = exec.Command("route", "add", "-host", v.ServerIP, gw, "-netmask", "255.255.255.255") | ||
| if out, err := c.CombinedOutput(); err != nil { | ||
| return errors.New(string(out) + err.Error()) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // DeleteRoutes deletes routes | ||
| func (v *VPN) DeleteRoutes() error { | ||
| c := exec.Command("route", "delete", "-net", "0.0.0.0", v.TunGateway, "-netmask", "128.0.0.0") | ||
| if out, err := c.CombinedOutput(); err != nil { | ||
| return errors.New(string(out) + err.Error()) | ||
| } | ||
| c = exec.Command("route", "delete", "-net", "128.0.0.0", v.TunGateway, "-netmask", "128.0.0.0") | ||
| if out, err := c.CombinedOutput(); err != nil { | ||
| return errors.New(string(out) + err.Error()) | ||
| } | ||
| gw, err := sysproxy.GetDefaultGateway() | ||
| if err != nil { | ||
| return err | ||
| } | ||
| c = exec.Command("route", "delete", "-host", v.ServerIP, gw, "-netmask", "255.255.255.255") | ||
| if out, err := c.CombinedOutput(); err != nil { | ||
| return errors.New(string(out) + err.Error()) | ||
| } | ||
| return nil | ||
| } |
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