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Pull request: 4698 Gateway IP in DHCP Lease

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Closes #4698.

Squashed commit of the following:

commit 6be0caee58926f8cea1e10650fbde0c8d97d0dac
Author: Ildar Kamalov <ik@adguard.com>
Date:   Fri Jul 8 13:41:50 2022 +0300

    update translation

commit e0370656d05e8463d73ea73568cae81187c6b2e3
Author: Ildar Kamalov <ik@adguard.com>
Date:   Fri Jul 8 13:40:54 2022 +0300

    client: validate static lease ip

commit 7f4d00f9f3a54dc93ce5d5c45e9c21745f6e39d1
Merge: 2ee79626 77e5e27d
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Fri Jul 8 13:20:15 2022 +0300

    Merge branch 'master' into 4698-lease-with-gateway

commit 2ee79626a1b0c7b113dbd22ba4ef6e85ea9913ec
Merge: 471b96b8 3505ce87
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Thu Jul 7 19:34:33 2022 +0300

    Merge branch 'master' into 4698-lease-with-gateway

commit 471b96b81da8920c1e71b7110050154f912677d2
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Thu Jul 7 16:07:23 2022 +0300

    dhcpd: imp docs

commit 67dd6c76f7d2df4712a57281e0f40f2ee1a1efa2
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Thu Jul 7 15:48:47 2022 +0300

    dhcpd: restrict gateway ip for lease
This commit is contained in:
Eugene Burkov
2022-07-08 15:17:47 +03:00
parent 77e5e27d75
commit a832987f7c
10 changed files with 120 additions and 42 deletions
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12
internal/dhcpd/v4.go
View File

@@ -333,12 +333,16 @@ func (s *v4Server) rmLease(lease *Lease) (err error) {
return errors.Error("lease not found")
}
// AddStaticLease adds a static lease. It is safe for concurrent use.
// AddStaticLease implements the DHCPServer interface for *v4Server. It is safe
// for concurrent use.
func (s *v4Server) AddStaticLease(l *Lease) (err error) {
defer func() { err = errors.Annotate(err, "dhcpv4: adding static lease: %w") }()
if ip4 := l.IP.To4(); ip4 == nil {
ip := l.IP.To4()
if ip == nil {
return fmt.Errorf("invalid ip %q, only ipv4 is supported", l.IP)
} else if gwIP := s.conf.GatewayIP; gwIP.Equal(ip) {
return fmt.Errorf("can't assign the gateway IP %s to the lease", gwIP)
}
l.Expiry = time.Unix(leaseExpireStatic, 0)
@@ -377,7 +381,7 @@ func (s *v4Server) AddStaticLease(l *Lease) (err error) {
if err != nil {
err = fmt.Errorf(
"removing dynamic leases for %s (%s): %w",
l.IP,
ip,
l.HWAddr,
err,
)
@@ -387,7 +391,7 @@ func (s *v4Server) AddStaticLease(l *Lease) (err error) {
err = s.addLease(l)
if err != nil {
err = fmt.Errorf("adding static lease for %s (%s): %w", l.IP, l.HWAddr, err)
err = fmt.Errorf("adding static lease for %s (%s): %w", ip, l.HWAddr, err)
return
}