f807f756eb
- Retro-compatibility: `OPENVPN_CUSTOM_CONFIG` set implies `VPNSP=custom` - Change: `up` and `down` options are not filtered out - Change: `OPENVPN_INTERFACE` overrides the network interface defined in the configuration file - Change: `PORT` overrides any port found in the configuration file - Feat: config file is read when building the OpenVPN configuration, so it's effectively reloaded on VPN restarts - Feat: extract values from custom file at start to log out valid settings - Maint: `internal/openvpn/extract` package instead of `internal/openvpn/custom` package - Maint: All providers' `BuildConf` method return an error - Maint: rename `CustomConfig` to `ConfFile` in Settings structures
102 lines
3.0 KiB
Go
102 lines
3.0 KiB
Go
package custom
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import (
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"errors"
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"fmt"
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"strconv"
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"strings"
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"github.com/qdm12/gluetun/internal/configuration"
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"github.com/qdm12/gluetun/internal/constants"
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"github.com/qdm12/gluetun/internal/models"
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"github.com/qdm12/gluetun/internal/provider/utils"
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)
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var ErrExtractData = errors.New("failed extracting information from custom configuration file")
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func (p *Provider) BuildConf(connection models.Connection,
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settings configuration.OpenVPN) (lines []string, err error) {
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lines, _, err = p.extractor.Data(settings.ConfFile)
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if err != nil {
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return nil, fmt.Errorf("%w: %s", ErrExtractData, err)
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}
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lines = modifyConfig(lines, connection, settings)
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return lines, nil
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}
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func modifyConfig(lines []string, connection models.Connection,
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settings configuration.OpenVPN) (modified []string) {
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// Remove some lines
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for _, line := range lines {
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switch {
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case
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line == "",
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strings.HasPrefix(line, "verb "),
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strings.HasPrefix(line, "auth-user-pass "),
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strings.HasPrefix(line, "user "),
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strings.HasPrefix(line, "proto "),
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strings.HasPrefix(line, "remote "),
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strings.HasPrefix(line, "dev "),
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settings.Cipher != "" && strings.HasPrefix(line, "cipher "),
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settings.Cipher != "" && strings.HasPrefix(line, "data-ciphers "),
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settings.Auth != "" && strings.HasPrefix(line, "auth "),
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settings.MSSFix > 0 && strings.HasPrefix(line, "mssfix "),
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!settings.IPv6 && strings.HasPrefix(line, "tun-ipv6"):
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default:
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modified = append(modified, line)
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}
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}
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// Add values
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modified = append(modified, connection.OpenVPNProtoLine())
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modified = append(modified, connection.OpenVPNRemoteLine())
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modified = append(modified, "dev "+settings.Interface)
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modified = append(modified, "mute-replay-warnings")
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modified = append(modified, "auth-nocache")
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modified = append(modified, "pull-filter ignore \"auth-token\"") // prevent auth failed loop
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modified = append(modified, "auth-retry nointeract")
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modified = append(modified, "suppress-timestamps")
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if settings.User != "" {
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modified = append(modified, "auth-user-pass "+constants.OpenVPNAuthConf)
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}
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modified = append(modified, "verb "+strconv.Itoa(settings.Verbosity))
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if settings.Cipher != "" {
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modified = append(modified, utils.CipherLines(settings.Cipher, settings.Version)...)
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}
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if settings.Auth != "" {
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modified = append(modified, "auth "+settings.Auth)
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}
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if settings.MSSFix > 0 {
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modified = append(modified, "mssfix "+strconv.Itoa(int(settings.MSSFix)))
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}
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if !settings.IPv6 {
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modified = append(modified, `pull-filter ignore "route-ipv6"`)
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modified = append(modified, `pull-filter ignore "ifconfig-ipv6"`)
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}
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if !settings.Root {
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modified = append(modified, "user "+settings.ProcUser)
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}
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modified = append(modified, "") // trailing line
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return uniqueLines(modified)
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}
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func uniqueLines(lines []string) (unique []string) {
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seen := make(map[string]struct{}, len(lines))
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unique = make([]string, 0, len(lines))
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for _, line := range lines {
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_, ok := seen[line]
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if ok {
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continue
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}
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seen[line] = struct{}{}
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unique = append(unique, line)
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}
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return unique
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}
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