67 lines
1.7 KiB
Go
67 lines
1.7 KiB
Go
package openvpn
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import (
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"context"
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"errors"
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"fmt"
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"os/exec"
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"strings"
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"syscall"
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"github.com/qdm12/gluetun/internal/constants"
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)
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var ErrVersionUnknown = errors.New("OpenVPN version is unknown")
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const (
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binOpenvpn24 = "openvpn2.4"
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binOpenvpn25 = "openvpn"
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)
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func (c *configurator) Start(ctx context.Context, version string, flags []string) (
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stdoutLines, stderrLines chan string, waitError chan error, err error) {
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var bin string
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switch version {
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case constants.Openvpn24:
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bin = binOpenvpn24
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case constants.Openvpn25:
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bin = binOpenvpn25
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default:
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return nil, nil, nil, fmt.Errorf("%w: %s", ErrVersionUnknown, version)
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}
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c.logger.Info("starting OpenVPN " + version)
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args := []string{"--config", constants.OpenVPNConf}
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args = append(args, flags...)
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cmd := exec.CommandContext(ctx, bin, args...)
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cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
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return c.cmder.Start(cmd)
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}
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func (c *configurator) Version24(ctx context.Context) (version string, err error) {
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return c.version(ctx, binOpenvpn24)
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}
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func (c *configurator) Version25(ctx context.Context) (version string, err error) {
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return c.version(ctx, binOpenvpn25)
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}
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var ErrVersionTooShort = errors.New("version output is too short")
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func (c *configurator) version(ctx context.Context, binName string) (version string, err error) {
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cmd := exec.CommandContext(ctx, binName, "--version")
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output, err := c.cmder.Run(cmd)
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if err != nil && err.Error() != "exit status 1" {
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return "", err
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}
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firstLine := strings.Split(output, "\n")[0]
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words := strings.Fields(firstLine)
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const minWords = 2
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if len(words) < minWords {
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return "", fmt.Errorf("%w: %s", ErrVersionTooShort, firstLine)
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}
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return words[1], nil
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}
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