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Pull request 2254: 4923 gopacket DHCP vol.9

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Updates #4923.

Squashed commit of the following:

commit 05322419156d18502f3f937e789df02d78971b30
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Tue Jul 9 18:18:35 2024 +0300

    dhcpsvc: imp docs

commit 083da3671320f7774db9c5b854e663162da9d214
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Tue Jul 9 15:28:52 2024 +0300

    dhcpsvc: imp code, tests

commit 22e37e587e29c781abd4f2486f282dcfbffb4e6b
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Mon Jul 8 19:31:43 2024 +0300

    dhcpsvc: imp tests

commit 83ec7c54ef1e689a1f887e78e3055522539222d5
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Mon Jul 8 18:56:21 2024 +0300

    dhcpsvc: add db
This commit is contained in:
Eugene Burkov
2024-07-09 20:04:24 +03:00
parent 9a6dd0dc55
commit e269260fbe
14 changed files with 639 additions and 227 deletions
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10
internal/dhcpsvc/config.go
View File

@@ -3,6 +3,7 @@ package dhcpsvc
import (
"fmt"
"log/slog"
"os"
"time"
"github.com/AdguardTeam/golibs/errors"
@@ -23,7 +24,8 @@ type Config struct {
// clients' hostnames.
LocalDomainName string
// TODO(e.burkov): Add DB path.
// DBFilePath is the path to the database file containing the DHCP leases.
DBFilePath string
// ICMPTimeout is the timeout for checking another DHCP server's presence.
ICMPTimeout time.Duration
@@ -64,6 +66,12 @@ func (conf *Config) Validate() (err error) {
errs = append(errs, err)
}
// This is a best-effort check for the file accessibility. The file will be
// checked again when it is opened later.
if _, err = os.Stat(conf.DBFilePath); err != nil && !errors.Is(err, os.ErrNotExist) {
errs = append(errs, fmt.Errorf("db file path %q: %w", conf.DBFilePath, err))
}
if len(conf.Interfaces) == 0 {
errs = append(errs, errNoInterfaces)