[feat] pure go bitmask vpn implemenation

- Resolves: #42

1 files changed, 92 insertions, 0 deletions

diff --git a/bitmask_go/launcher_linux.go b/bitmask_go/launcher_linux.go
new file mode 100644
index 0000000..05398a6
--- /dev/null
+++ b/bitmask_go/launcher_linux.go
@@ -0,0 +1,92 @@
+// +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 bitmask
+
+import (
+	"errors"
+	"log"
+	"os"
+	"os/exec"
+)
+
+const (
+	systemOpenvpnPath = "/usr/sbin/openvpn"
+	snapOpenvpnPath   = "/snap/bin/riseup-vpn.openvpn"
+)
+
+var bitmaskRootPaths = []string{
+	"/usr/sbin/bitmask-root",
+	"/usr/local/sbin/bitmask-root",
+	"/snap/bin/riseup-vpn.bitmask-root",
+}
+
+func openvpnStart(flags ...string) error {
+	log.Println("openvpn start: ", flags)
+	arg := []string{"openvpn", "start", getOpenvpnPath()}
+	arg = append(arg, flags...)
+	// TODO: check errors somehow instead of fire and forget
+	go runBitmaskRoot(arg...)
+	return nil
+}
+
+func openvpnStop() error {
+	log.Println("openvpn stop")
+	return runBitmaskRoot("openvpn", "stop")
+}
+
+func firewallStart(gateways []string) error {
+	log.Println("firewall start")
+	arg := []string{"firewall", "start"}
+	arg = append(arg, gateways...)
+	return runBitmaskRoot(arg...)
+}
+
+func firewallStop() error {
+	log.Println("firewall stop")
+	return runBitmaskRoot("firewall", "stop")
+}
+
+func runBitmaskRoot(arg ...string) error {
+	bitmaskRoot, err := bitmaskRootPath()
+	if err != nil {
+		return err
+	}
+	arg = append([]string{bitmaskRoot}, arg...)
+
+	cmd := exec.Command("pkexec", arg...)
+	err = cmd.Run()
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func bitmaskRootPath() (string, error) {
+	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
+}