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Pull request 1800: AG-20352-dhcpd-lease-is-static

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Merge in DNS/adguard-home from AG-20352-dhcpd-lease-is-static to master

Squashed commit of the following:

commit e4f4278a7ffa0f084ed41472dd3e7de4466c9f50
Merge: b6e3b62e 15bba281
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Mon Apr 10 11:13:05 2023 +0300

    Merge branch 'master' into AG-20352-dhcpd-lease-is-static

commit b6e3b62ed4e7bc17fc3fdd2f4faa940a7f4334c2
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Thu Apr 6 15:20:42 2023 +0300

    dhcpd: imp naming

commit e2d9ed0832b329f4cebcf8cbfcfadc5755fe441b
Merge: ecd244a6 10bffd89
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Wed Apr 5 16:53:55 2023 +0300

    Merge branch 'master' into AG-20352-dhcpd-lease-is-static

commit ecd244a60841d3cb96d292da688e353650baf645
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Wed Apr 5 16:53:15 2023 +0300

    dhcpd: add lease json form

commit 9ebc246ed4711ff46091326a7cb35ea90b880cff
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Wed Apr 5 13:11:25 2023 +0300

    dhcpd: imp code

commit fc3d0cdaebf9e32e73d57e80296f9891896259cf
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Wed Apr 5 13:00:59 2023 +0300

    all: fix json

commit d722578543b98b1fefabecd6486f3bc102263d71
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Wed Apr 5 12:23:34 2023 +0300

    dhcpd: add lease is static
This commit is contained in:
Stanislav Chzhen 2023-04-10 11:17:05 +03:00
parent 15bba281ee
commit 89bf3721b5
10 changed files with 128 additions and 44 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
internal/dhcpd/db.go
View file

@ -71,16 +71,17 @@ func (s *server) dbLoad() (err error) {
IP: ip,
Hostname: obj[i].Hostname,
Expiry: time.Unix(obj[i].Expiry, 0),
IsStatic: obj[i].Expiry == leaseExpireStatic,
}
if len(obj[i].IP) == 16 {
if obj[i].Expiry == leaseExpireStatic {
if lease.IsStatic {
v6StaticLeases = append(v6StaticLeases, &lease)
} else {
v6DynLeases = append(v6DynLeases, &lease)
}
} else {
if obj[i].Expiry == leaseExpireStatic {
if lease.IsStatic {
staticLeases = append(staticLeases, &lease)
} else {
dynLeases = append(dynLeases, &lease)

13
internal/dhcpd/dhcpd.go
View file

@ -51,6 +51,9 @@ type Lease struct {
//
// TODO(a.garipov): Migrate leases.db.
IP netip.Addr `json:"ip"`
// IsStatic defines if the lease is static.
IsStatic bool `json:"static"`
}
// Clone returns a deep copy of l.
@ -64,6 +67,7 @@ func (l *Lease) Clone() (clone *Lease) {
Hostname: l.Hostname,
HWAddr: slices.Clone(l.HWAddr),
IP: l.IP,
IsStatic: l.IsStatic,
}
}
@ -84,17 +88,10 @@ func (l *Lease) IsBlocklisted() (ok bool) {
return true
}
// IsStatic returns true if the lease is static.
//
// TODO(a.garipov): Just make it a boolean field.
func (l *Lease) IsStatic() (ok bool) {
return l != nil && l.Expiry.Unix() == leaseExpireStatic
}
// MarshalJSON implements the json.Marshaler interface for Lease.
func (l Lease) MarshalJSON() ([]byte, error) {
var expiryStr string
if !l.IsStatic() {
if !l.IsStatic {
// The front-end is waiting for RFC 3999 format of the time
// value. It also shouldn't got an Expiry field for static
// leases.

2
internal/dhcpd/dhcpd_unix_test.go
View file

@ -80,7 +80,7 @@ func TestDB(t *testing.T) {
assert.Equal(t, leases[1].HWAddr, ll[0].HWAddr)
assert.Equal(t, leases[1].IP, ll[0].IP)
assert.True(t, ll[0].IsStatic())
assert.True(t, ll[0].IsStatic)
assert.Equal(t, leases[0].HWAddr, ll[1].HWAddr)
assert.Equal(t, leases[0].IP, ll[1].IP)

96
internal/dhcpd/http_unix.go
View file

@ -9,6 +9,7 @@ import (
"net/http"
"net/netip"
"os"
"time"
"github.com/AdguardTeam/AdGuardHome/internal/aghalg"
"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
@ -60,11 +61,76 @@ type dhcpStatusResponse struct {
IfaceName string `json:"interface_name"`
V4 V4ServerConf `json:"v4"`
V6 V6ServerConf `json:"v6"`
Leases []*Lease `json:"leases"`
StaticLeases []*Lease `json:"static_leases"`
Leases []*leaseDynamic `json:"leases"`
StaticLeases []*leaseStatic `json:"static_leases"`
Enabled bool `json:"enabled"`
}
// leaseStatic is the JSON form of static DHCP lease.
type leaseStatic struct {
HWAddr string `json:"mac"`
IP netip.Addr `json:"ip"`
Hostname string `json:"hostname"`
}
// leasesToStatic converts list of leases to their JSON form.
func leasesToStatic(leases []*Lease) (static []*leaseStatic) {
static = make([]*leaseStatic, len(leases))
for i, l := range leases {
static[i] = &leaseStatic{
HWAddr: l.HWAddr.String(),
IP: l.IP,
Hostname: l.Hostname,
}
}
return static
}
// toLease converts leaseStatic to Lease or returns error.
func (l *leaseStatic) toLease() (lease *Lease, err error) {
addr, err := net.ParseMAC(l.HWAddr)
if err != nil {
return nil, fmt.Errorf("couldn't parse MAC address: %w", err)
}
return &Lease{
HWAddr: addr,
IP: l.IP,
Hostname: l.Hostname,
IsStatic: true,
}, nil
}
// leaseDynamic is the JSON form of dynamic DHCP lease.
type leaseDynamic struct {
HWAddr string `json:"mac"`
IP netip.Addr `json:"ip"`
Hostname string `json:"hostname"`
Expiry string `json:"expires"`
}
// leasesToDynamic converts list of leases to their JSON form.
func leasesToDynamic(leases []*Lease) (dynamic []*leaseDynamic) {
dynamic = make([]*leaseDynamic, len(leases))
for i, l := range leases {
dynamic[i] = &leaseDynamic{
HWAddr: l.HWAddr.String(),
IP: l.IP,
Hostname: l.Hostname,
// The front-end is waiting for RFC 3999 format of the time
// value.
//
// See https://github.com/AdguardTeam/AdGuardHome/issues/2692.
Expiry: l.Expiry.Format(time.RFC3339),
}
}
return dynamic
}
func (s *server) handleDHCPStatus(w http.ResponseWriter, r *http.Request) {
status := &dhcpStatusResponse{
Enabled: s.conf.Enabled,
@ -76,8 +142,8 @@ func (s *server) handleDHCPStatus(w http.ResponseWriter, r *http.Request) {
s.srv4.WriteDiskConfig4(&status.V4)
s.srv6.WriteDiskConfig6(&status.V6)
status.Leases = s.Leases(LeasesDynamic)
status.StaticLeases = s.Leases(LeasesStatic)
status.Leases = leasesToDynamic(s.Leases(LeasesDynamic))
status.StaticLeases = leasesToStatic(s.Leases(LeasesStatic))
_ = aghhttp.WriteJSONResponse(w, r, status)
}
@ -488,7 +554,7 @@ func setOtherDHCPResult(ifaceName string, result *dhcpSearchResult) {
}
func (s *server) handleDHCPAddStaticLease(w http.ResponseWriter, r *http.Request) {
l := &Lease{}
l := &leaseStatic{}
err := json.NewDecoder(r.Body).Decode(l)
if err != nil {
aghhttp.Error(r, w, http.StatusBadRequest, "json.Decode: %s", err)
@ -511,7 +577,14 @@ func (s *server) handleDHCPAddStaticLease(w http.ResponseWriter, r *http.Request
srv = s.srv6
}
err = srv.AddStaticLease(l)
lease, err := l.toLease()
if err != nil {
aghhttp.Error(r, w, http.StatusBadRequest, "parsing: %s", err)
return
}
err = srv.AddStaticLease(lease)
if err != nil {
aghhttp.Error(r, w, http.StatusBadRequest, "%s", err)
@ -520,7 +593,7 @@ func (s *server) handleDHCPAddStaticLease(w http.ResponseWriter, r *http.Request
}
func (s *server) handleDHCPRemoveStaticLease(w http.ResponseWriter, r *http.Request) {
l := &Lease{}
l := &leaseStatic{}
err := json.NewDecoder(r.Body).Decode(l)
if err != nil {
aghhttp.Error(r, w, http.StatusBadRequest, "json.Decode: %s", err)
@ -543,7 +616,14 @@ func (s *server) handleDHCPRemoveStaticLease(w http.ResponseWriter, r *http.Requ
srv = s.srv6
}
err = srv.RemoveStaticLease(l)
lease, err := l.toLease()
if err != nil {
aghhttp.Error(r, w, http.StatusBadRequest, "parsing: %s", err)
return
}
err = srv.RemoveStaticLease(lease)
if err != nil {
aghhttp.Error(r, w, http.StatusBadRequest, "%s", err)

21
internal/dhcpd/http_unix_test.go
View file

@ -5,28 +5,27 @@ package dhcpd
import (
"bytes"
"encoding/json"
"net"
"net/http"
"net/http/httptest"
"net/netip"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestServer_handleDHCPStatus(t *testing.T) {
const staticName = "static-client"
const (
staticName = "static-client"
staticMAC = "aa:aa:aa:aa:aa:aa"
)
staticIP := netip.MustParseAddr("192.168.10.10")
staticMAC := net.HardwareAddr{0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA}
staticLease := &Lease{
Expiry: time.Unix(leaseExpireStatic, 0),
Hostname: staticName,
staticLease := &leaseStatic{
HWAddr: staticMAC,
IP: staticIP,
Hostname: staticName,
}
s, err := Create(&ServerConfig{
@ -65,8 +64,8 @@ func TestServer_handleDHCPStatus(t *testing.T) {
resp := &dhcpStatusResponse{
V4: *conf4,
V6: V6ServerConf{},
Leases: []*Lease{},
StaticLeases: []*Lease{},
Leases: []*leaseDynamic{},
StaticLeases: []*leaseStatic{},
Enabled: true,
}
@ -95,7 +94,7 @@ func TestServer_handleDHCPStatus(t *testing.T) {
assert.Equal(t, http.StatusOK, w.Code)
resp := defaultResponse()
resp.StaticLeases = []*Lease{staticLease}
resp.StaticLeases = []*leaseStatic{staticLease}
checkStatus(t, resp)
})
@ -106,7 +105,7 @@ func TestServer_handleDHCPStatus(t *testing.T) {
b := &bytes.Buffer{}
err = json.NewEncoder(b).Encode(&Lease{})
err = json.NewEncoder(b).Encode(&leaseStatic{})
require.NoError(t, err)
var r *http.Request

15
internal/dhcpd/v4_unix.go
View file

@ -128,7 +128,7 @@ func (s *v4Server) ResetLeases(leases []*Lease) (err error) {
s.leases = nil
for _, l := range leases {
if !l.IsStatic() {
if !l.IsStatic {
l.Hostname = s.validHostnameForClient(l.Hostname, l.IP)
}
err = s.addLease(l)
@ -190,7 +190,7 @@ func (s *v4Server) GetLeases(flags GetLeasesFlags) (leases []*Lease) {
continue
}
if getStatic && l.IsStatic() {
if getStatic && l.IsStatic {
leases = append(leases, l.Clone())
}
}
@ -211,7 +211,7 @@ func (s *v4Server) FindMACbyIP(ip netip.Addr) (mac net.HardwareAddr) {
for _, l := range s.leases {
if l.IP == ip {
if l.Expiry.After(now) || l.IsStatic() {
if l.IsStatic || l.Expiry.After(now) {
return l.HWAddr
}
}
@ -259,7 +259,7 @@ func (s *v4Server) rmLeaseByIndex(i int) {
// Return error if a static lease is found
func (s *v4Server) rmDynamicLease(lease *Lease) (err error) {
for i, l := range s.leases {
isStatic := l.IsStatic()
isStatic := l.IsStatic
if bytes.Equal(l.HWAddr, lease.HWAddr) || l.IP == lease.IP {
if isStatic {
@ -292,7 +292,7 @@ func (s *v4Server) addLease(l *Lease) (err error) {
leaseIP := net.IP(l.IP.AsSlice())
offset, inOffset := r.offset(leaseIP)
if l.IsStatic() {
if l.IsStatic {
// TODO(a.garipov, d.seregin): Subnet can be nil when dhcp server is
// disabled.
if sn := s.conf.subnet; !sn.Contains(l.IP) {
@ -359,6 +359,7 @@ func (s *v4Server) AddStaticLease(l *Lease) (err error) {
}
l.Expiry = time.Unix(leaseExpireStatic, 0)
l.IsStatic = true
err = netutil.ValidateMAC(l.HWAddr)
if err != nil {
@ -528,7 +529,7 @@ func (s *v4Server) nextIP() (ip net.IP) {
func (s *v4Server) findExpiredLease() int {
now := time.Now()
for i, lease := range s.leases {
if !lease.IsStatic() && lease.Expiry.Before(now) {
if !lease.IsStatic && lease.Expiry.Before(now) {
return i
}
}
@ -860,7 +861,7 @@ func (s *v4Server) handleRequest(req, resp *dhcpv4.DHCPv4) (lease *Lease, needsR
s.leasesLock.Lock()
defer s.leasesLock.Unlock()
if lease.IsStatic() {
if lease.IsStatic {
if lease.Hostname != "" {
// TODO(e.burkov): This option is used to update the server's DNS
// mapping. The option should only be answered when it has been

7
internal/dhcpd/v4_unix_test.go
View file

@ -73,6 +73,7 @@ func TestV4Server_leasing(t *testing.T) {
Hostname: staticName,
HWAddr: staticMAC,
IP: staticIP,
IsStatic: true,
})
require.NoError(t, err)
@ -82,6 +83,7 @@ func TestV4Server_leasing(t *testing.T) {
Hostname: staticName,
HWAddr: anotherMAC,
IP: anotherIP,
IsStatic: true,
})
assert.ErrorIs(t, err, ErrDupHostname)
})
@ -96,6 +98,7 @@ func TestV4Server_leasing(t *testing.T) {
Hostname: anotherName,
HWAddr: staticMAC,
IP: anotherIP,
IsStatic: true,
})
testutil.AssertErrorMsg(t, wantErrMsg, err)
})
@ -110,6 +113,7 @@ func TestV4Server_leasing(t *testing.T) {
Hostname: anotherName,
HWAddr: anotherMAC,
IP: staticIP,
IsStatic: true,
})
testutil.AssertErrorMsg(t, wantErrMsg, err)
})
@ -326,7 +330,7 @@ func TestV4_AddReplace(t *testing.T) {
for i, l := range ls {
assert.Equal(t, stLeases[i].IP, l.IP)
assert.Equal(t, stLeases[i].HWAddr, l.HWAddr)
assert.True(t, l.IsStatic())
assert.True(t, l.IsStatic)
}
}
@ -890,6 +894,7 @@ func TestV4Server_FindMACbyIP(t *testing.T) {
Hostname: staticName,
HWAddr: staticMAC,
IP: staticIP,
IsStatic: true,
}, {
Expiry: time.Unix(10, 0),
Hostname: anotherName,

2
internal/dhcpd/v6_unix.go
View file

@ -121,7 +121,7 @@ func (s *v6Server) FindMACbyIP(ip netip.Addr) (mac net.HardwareAddr) {
for _, l := range s.leases {
if l.IP == ip {
if l.Expiry.After(now) || l.IsStatic() {
if l.IsStatic || l.Expiry.After(now) {
return l.HWAddr
}
}

2
internal/dhcpd/v6_unix_test.go
View file

@ -331,6 +331,7 @@ func TestV6_FindMACbyIP(t *testing.T) {
Hostname: staticName,
HWAddr: staticMAC,
IP: staticIP,
IsStatic: true,
}, {
Expiry: time.Unix(10, 0),
Hostname: anotherName,
@ -344,6 +345,7 @@ func TestV6_FindMACbyIP(t *testing.T) {
Hostname: staticName,
HWAddr: staticMAC,
IP: staticIP,
IsStatic: true,
}, {
Expiry: time.Unix(10, 0),
Hostname: anotherName,

1
openapi/openapi.yaml
View file

@ -1849,7 +1849,6 @@
- 'mac'
- 'ip'
- 'hostname'
- 'expires'
'properties':
'mac':
'type': 'string'