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Pull request: 3166 fix dhcp
Updates #3166.
Squashed commit of the following:
commit cac62f842886f06a70fb50d251938e0feaa06846
Author: Ildar Kamalov <ik@adguard.com>
Date: Thu Jun 10 14:35:40 2021 +0300
client: get dhcp status on static lease submit
commit 2ae4e3ab40041fbc0f53f4902a00263425409a6a
Merge: 1e0f9c15 299ea88c
Author: Eugene Burkov <e.burkov@adguard.com>
Date: Thu Jun 10 14:09:05 2021 +0300
Merge branch 'master' into 3166-fix-dhcp
commit 1e0f9c15d98f40a499c75b74bca48fe58512e300
Author: Eugene Burkov <e.burkov@adguard.com>
Date: Thu Jun 10 14:03:58 2021 +0300
dhcpd: imp code
commit e4b9626b60a11cd2491c675a297f527f7e12f9b4
Author: Eugene Burkov <e.burkov@adguard.com>
Date: Thu Jun 10 13:03:47 2021 +0300
dhcpd: fix static lease load
commit dc449f21986a8ea300d07c081f1e416b2f08bc25
Author: Eugene Burkov <e.burkov@adguard.com>
Date: Tue Jun 1 17:21:10 2021 +0300
home: change clients sources priority
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299ea88ceb
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@ -47,6 +47,8 @@ released by then.
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### Fixed
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- Redundant hostname generating while loading static leases with empty hostname
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([#3166]).
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- Domain name case in responses ([#3194]).
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- Custom upstreams selection for clients with client IDs in DNS-over-TLS and
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DNS-over-HTTP ([#3186]).
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@ -61,6 +63,7 @@ released by then.
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[#2443]: https://github.com/AdguardTeam/AdGuardHome/issues/2443
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[#2763]: https://github.com/AdguardTeam/AdGuardHome/issues/2763
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[#3136]: https://github.com/AdguardTeam/AdGuardHome/issues/3136
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[#3166]: https://github.com/AdguardTeam/AdGuardHome/issues/3166
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[#3172]: https://github.com/AdguardTeam/AdGuardHome/issues/3172
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[#3184]: https://github.com/AdguardTeam/AdGuardHome/issues/3184
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[#3185]: https://github.com/AdguardTeam/AdGuardHome/issues/3185
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@ -561,6 +561,7 @@ export const addStaticLease = (config) => async (dispatch) => {
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dispatch(addStaticLeaseSuccess(config));
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dispatch(addSuccessToast(i18next.t('dhcp_lease_added', { key: name })));
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dispatch(toggleLeaseModal());
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dispatch(getDhcpStatus());
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} catch (error) {
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dispatch(addErrorToast({ error }));
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dispatch(addStaticLeaseFailure());
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@ -127,7 +127,7 @@ func ValidateDomainName(name string) (err error) {
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// The maximum lengths of generated hostnames for different IP versions.
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const (
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ipv4HostnameMaxLen = len("192-168-100-10-")
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ipv4HostnameMaxLen = len("192-168-100-100")
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ipv6HostnameMaxLen = len("ff80-f076-0000-0000-0000-0000-0000-0010")
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)
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@ -110,7 +110,9 @@ func (s *v4Server) ResetLeases(leases []*Lease) {
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s.leases = nil
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for _, l := range leases {
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l.Hostname = s.validHostnameForClient(l.Hostname, l.IP)
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if !l.IsStatic() {
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l.Hostname = s.validHostnameForClient(l.Hostname, l.IP)
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}
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err = s.addLease(l)
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if err != nil {
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// TODO(a.garipov): Wrap and bubble up the error.
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@ -339,9 +341,8 @@ func (s *v4Server) AddStaticLease(l Lease) (err error) {
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return err
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}
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if l.Hostname != "" {
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var hostname string
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hostname, err = normalizeHostname(l.Hostname)
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if hostname := l.Hostname; hostname != "" {
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hostname, err = normalizeHostname(hostname)
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if err != nil {
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return err
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}
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@ -635,6 +636,33 @@ func (o *optFQDN) ToBytes() []byte {
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return b
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}
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// checkLease checks if the pair of mac and ip is already leased. The mismatch
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// is true when the existing lease has the same hardware address but differs in
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// its IP address.
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func (s *v4Server) checkLease(mac net.HardwareAddr, ip net.IP) (lease *Lease, mismatch bool) {
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s.leasesLock.Lock()
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defer s.leasesLock.Unlock()
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for _, l := range s.leases {
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if !bytes.Equal(l.HWAddr, mac) {
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continue
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}
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if l.IP.Equal(ip) {
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return l, false
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}
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log.Debug(
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`dhcpv4: mismatched OptionRequestedIPAddress in req msg for %s`,
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mac,
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)
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return nil, true
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}
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return nil, false
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}
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// processRequest is the handler for the DHCP Request request.
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func (s *v4Server) processRequest(req, resp *dhcpv4.DHCPv4) (lease *Lease, needsReply bool) {
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mac := req.ClientHWAddr
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@ -656,33 +684,8 @@ func (s *v4Server) processRequest(req, resp *dhcpv4.DHCPv4) (lease *Lease, needs
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return nil, false
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}
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mismatch := false
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func() {
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s.leasesLock.Lock()
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defer s.leasesLock.Unlock()
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for _, l := range s.leases {
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if !bytes.Equal(l.HWAddr, mac) {
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continue
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}
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if l.IP.Equal(reqIP) {
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lease = l
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return
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}
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log.Debug(
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`dhcpv4: mismatched OptionRequestedIPAddress in req msg for %s`,
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mac,
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)
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mismatch = true
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return
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}
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}()
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if mismatch {
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var mismatch bool
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if lease, mismatch = s.checkLease(mac, reqIP); mismatch {
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return nil, true
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}
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@ -53,13 +53,11 @@ type Client struct {
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type clientSource uint
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// Client sources. The order determines the priority.
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//
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// TODO(e.burkov): Is ARP a higher priority source than DHCP?
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const (
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ClientSourceWHOIS clientSource = iota
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ClientSourceRDNS
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ClientSourceDHCP
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ClientSourceARP
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ClientSourceDHCP
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ClientSourceHostsFile
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)
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@ -151,6 +151,20 @@ func TestClients(t *testing.T) {
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assert.True(t, clients.Exists("1.1.1.1", ClientSourceHostsFile))
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})
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t.Run("dhcp_replaces_arp", func(t *testing.T) {
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ok, err := clients.AddHost("1.2.3.4", "from_arp", ClientSourceARP)
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require.NoError(t, err)
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assert.True(t, ok)
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assert.True(t, clients.Exists("1.2.3.4", ClientSourceARP))
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ok, err = clients.AddHost("1.2.3.4", "from_dhcp", ClientSourceDHCP)
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require.NoError(t, err)
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assert.True(t, ok)
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assert.True(t, clients.Exists("1.2.3.4", ClientSourceDHCP))
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})
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t.Run("addhost_fail", func(t *testing.T) {
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ok, err := clients.AddHost("1.1.1.1", "host1", ClientSourceRDNS)
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require.NoError(t, err)
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