1 files changed, 224 insertions, 0 deletions
diff --git a/pkg/vpn/launcher_linux.go b/pkg/vpn/launcher_linux.go
new file mode 100644
index 0000000..71a74ea
--- /dev/null
+++ b/pkg/vpn/launcher_linux.go
@@ -0,0 +1,224 @@
+// +build linux
+// Copyright (C) 2018 LEAP
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package vpn
+
+import (
+	"errors"
+	"log"
+	"os"
+	"os/exec"
+	"strings"
+
+	"0xacab.org/leap/bitmask-vpn/pkg/config"
+	"0xacab.org/leap/bitmask-vpn/pkg/vpn/bonafide"
+	"github.com/keybase/go-ps"
+)
+
+const (
+	systemOpenvpnPath   = "/usr/sbin/openvpn"
+	snapOpenvpnPath     = "/snap/bin/" + config.BinaryName + ".openvpn"
+	snapBitmaskRootPath = "/snap/bin/" + config.BinaryName + ".bitmask-root"
+)
+
+var bitmaskRootPaths = []string{
+	"/usr/sbin/bitmask-root",
+	"/usr/local/sbin/bitmask-root",
+}
+
+type launcher struct {
+	openvpnCh chan []string
+}
+
+func newLauncher() (*launcher, error) {
+	l := launcher{make(chan []string, 1)}
+	go l.openvpnRunner()
+	return &l, nil
+}
+
+func (l *launcher) close() error {
+	return nil
+}
+
+func (l *launcher) check() (helpers bool, priviledge bool, err error) {
+
+	/*
+		isRunning, err := isPolkitRunning()
+		if err != nil {
+			return
+		}
+		if !isRunning {
+			polkitPath := getPolkitPath()
+			if polkitPath == "" {
+				return true, false, nil
+			}
+			cmd := exec.Command("setsid", polkitPath)
+			err = cmd.Start()
+			if err != nil {
+				return
+			}
+			isRunning, err = isPolkitRunning()
+			return true, isRunning, err
+		}
+	*/
+
+	return true, true, nil
+}
+
+func isPolkitRunning() (bool, error) {
+	var polkitProcNames = [...]string{
+		"polkit-gnome-authentication-agent-1",
+		"polkit-kde-authentication-agent-1",
+		"polkit-mate-authentication-agent-1",
+		"lxpolkit",
+		"lxsession",
+		"gnome-shell",
+		"gnome-flashback",
+		"fingerprint-polkit-agent",
+		"xfce-polkit",
+	}
+
+	processes, err := ps.Processes()
+	if err != nil {
+		return false, err
+	}
+
+	for _, proc := range processes {
+		executable := proc.Executable()
+		for _, name := range polkitProcNames {
+			if strings.Contains(executable, name) {
+				return true, nil
+			}
+		}
+	}
+	return false, nil
+}
+
+func getPolkitPath() string {
+	var polkitPaths = [...]string{
+		"/usr/bin/lxpolkit",
+		"/usr/bin/lxqt-policykit-agent",
+		"/usr/lib/policykit-1-gnome/polkit-gnome-authentication-agent-1",
+		"/usr/lib/x86_64-linux-gnu/polkit-mate/polkit-mate-authentication-agent-1",
+		"/usr/lib/mate-polkit/polkit-mate-authentication-agent-1",
+		"/usr/lib/x86_64-linux-gnu/libexec/polkit-kde-authentication-agent-1",
+		"/usr/lib/kde4/libexec/polkit-kde-authentication-agent-1",
+		// now we get weird
+		"/usr/libexec/policykit-1-pantheon/pantheon-agent-polkit",
+		"/usr/lib/polkit-1-dde/dde-polkit-agent",
+		// do you know some we"re still missing? :)
+	}
+
+	for _, polkit := range polkitPaths {
+		_, err := os.Stat(polkit)
+		if err == nil {
+			return polkit
+		}
+	}
+	return ""
+}
+
+func (l *launcher) openvpnStart(flags ...string) error {
+	log.Println("openvpn start: ", flags)
+	arg := []string{"openvpn", "start", getOpenvpnPath()}
+	arg = append(arg, flags...)
+	l.openvpnCh <- arg
+	return nil
+}
+
+func (l *launcher) openvpnStop() error {
+	l.openvpnCh <- nil
+	log.Println("openvpn stop")
+	return runBitmaskRoot("openvpn", "stop")
+}
+
+func (l *launcher) firewallStart(gateways []bonafide.Gateway) error {
+	log.Println("firewall start")
+	arg := []string{"firewall", "start"}
+	for _, gw := range gateways {
+		arg = append(arg, gw.IPAddress)
+	}
+	return runBitmaskRoot(arg...)
+}
+
+func (l *launcher) firewallStop() error {
+	log.Println("firewall stop")
+	return runBitmaskRoot("firewall", "stop")
+}
+
+func (l *launcher) firewallIsUp() bool {
+	err := runBitmaskRoot("firewall", "isup")
+	return err == nil
+}
+
+func (l *launcher) openvpnRunner(arg ...string) {
+	running := false
+	runOpenvpn := func(arg []string) {
+		for running {
+			err := runBitmaskRoot(arg...)
+			if err != nil {
+				log.Printf("An error ocurred running openvpn: %v", err)
+			}
+		}
+	}
+
+	for arg := range l.openvpnCh {
+		if arg == nil {
+			running = false
+		} else {
+			running = true
+			go runOpenvpn(arg)
+		}
+	}
+}
+
+func runBitmaskRoot(arg ...string) error {
+	bitmaskRoot, err := bitmaskRootPath()
+	if err != nil {
+		return err
+	}
+	arg = append([]string{bitmaskRoot}, arg...)
+
+	out, err := exec.Command("pkexec", arg...).Output()
+	if err != nil && arg[2] != "isup" {
+		log.Println("Error while running bitmask-root:")
+		log.Println("args: ", arg)
+		log.Println("output: ", string(out))
+	}
+	return err
+}
+
+func bitmaskRootPath() (string, error) {
+	if os.Getenv("SNAP") != "" {
+		path := snapBitmaskRootPath
+		if _, err := os.Stat(path); !os.IsNotExist(err) {
+			return path, nil
+		}
+	}
+	for _, path := range bitmaskRootPaths {
+		if _, err := os.Stat(path); !os.IsNotExist(err) {
+			return path, nil
+		}
+	}
+	return "", errors.New("No bitmask-root found")
+}
+
+func getOpenvpnPath() string {
+	if os.Getenv("SNAP") != "" {
+		return snapOpenvpnPath
+	}
+	return systemOpenvpnPath
+}