mirror of
https://github.com/AdguardTeam/AdGuardHome.git
synced 2024-11-30 04:04:27 +03:00
277 lines
8.1 KiB
Go
277 lines
8.1 KiB
Go
package dhcpd
|
|
|
|
import (
|
|
"bytes"
|
|
"net"
|
|
"os"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/krolaw/dhcp4"
|
|
"github.com/stretchr/testify/assert"
|
|
)
|
|
|
|
func check(t *testing.T, result bool, msg string) {
|
|
if !result {
|
|
t.Fatal(msg)
|
|
}
|
|
}
|
|
|
|
// Tests performed:
|
|
// . Handle Discover message (lease reserve)
|
|
// . Handle Request message (lease commit)
|
|
// . Static leases
|
|
func TestDHCP(t *testing.T) {
|
|
var s = Server{}
|
|
s.conf.DBFilePath = dbFilename
|
|
defer func() { _ = os.Remove(dbFilename) }()
|
|
var p, p2 dhcp4.Packet
|
|
var hw net.HardwareAddr
|
|
var lease *Lease
|
|
var opt dhcp4.Options
|
|
|
|
s.reset()
|
|
s.leaseStart = []byte{1, 1, 1, 1}
|
|
s.leaseStop = []byte{1, 1, 1, 2}
|
|
s.leaseTime = 5 * time.Second
|
|
s.leaseOptions = dhcp4.Options{}
|
|
s.ipnet = &net.IPNet{
|
|
IP: []byte{1, 2, 3, 4},
|
|
Mask: []byte{0xff, 0xff, 0xff, 0xff},
|
|
}
|
|
|
|
p = make(dhcp4.Packet, 241)
|
|
|
|
// Discover and reserve an IP
|
|
hw = []byte{3, 2, 3, 4, 5, 6}
|
|
p.SetCHAddr(hw)
|
|
p.SetCIAddr([]byte{0, 0, 0, 0})
|
|
opt = make(dhcp4.Options, 10)
|
|
p2 = s.handleDiscover(p, opt)
|
|
opt = p2.ParseOptions()
|
|
check(t, bytes.Equal(opt[dhcp4.OptionDHCPMessageType], []byte{byte(dhcp4.Offer)}), "dhcp4.Offer")
|
|
check(t, bytes.Equal(p2.YIAddr(), []byte{1, 1, 1, 1}), "p2.YIAddr")
|
|
check(t, bytes.Equal(p2.CHAddr(), hw), "p2.CHAddr")
|
|
check(t, bytes.Equal(opt[dhcp4.OptionIPAddressLeaseTime], dhcp4.OptionsLeaseTime(5*time.Second)), "OptionIPAddressLeaseTime")
|
|
check(t, bytes.Equal(opt[dhcp4.OptionServerIdentifier], s.ipnet.IP), "OptionServerIdentifier")
|
|
|
|
lease = s.findLease(p)
|
|
check(t, bytes.Equal(lease.HWAddr, hw), "lease.HWAddr")
|
|
check(t, bytes.Equal(lease.IP, []byte{1, 1, 1, 1}), "lease.IP")
|
|
|
|
// Reserve an IP - the next IP from the range
|
|
hw = []byte{2, 2, 3, 4, 5, 6}
|
|
p.SetCHAddr(hw)
|
|
lease, _ = s.reserveLease(p)
|
|
check(t, bytes.Equal(lease.HWAddr, hw), "lease.HWAddr")
|
|
check(t, bytes.Equal(lease.IP, []byte{1, 1, 1, 2}), "lease.IP")
|
|
|
|
// Reserve an IP - we have no more available IPs,
|
|
// so the first expired (or, in our case, not yet committed) lease is returned
|
|
hw = []byte{1, 2, 3, 4, 5, 6}
|
|
p.SetCHAddr(hw)
|
|
lease, _ = s.reserveLease(p)
|
|
check(t, bytes.Equal(lease.HWAddr, hw), "lease.HWAddr")
|
|
check(t, bytes.Equal(lease.IP, []byte{1, 1, 1, 1}), "lease.IP")
|
|
|
|
// Decline request for a lease which doesn't match our internal state
|
|
hw = []byte{1, 2, 3, 4, 5, 6}
|
|
p.SetCHAddr(hw)
|
|
p.SetCIAddr([]byte{0, 0, 0, 0})
|
|
opt = make(dhcp4.Options, 10)
|
|
// ask a different IP
|
|
opt[dhcp4.OptionRequestedIPAddress] = []byte{1, 1, 1, 2}
|
|
p2 = s.handleDHCP4Request(p, opt)
|
|
opt = p2.ParseOptions()
|
|
check(t, bytes.Equal(opt[dhcp4.OptionDHCPMessageType], []byte{byte(dhcp4.NAK)}), "dhcp4.NAK")
|
|
|
|
// Commit the previously reserved lease
|
|
hw = []byte{1, 2, 3, 4, 5, 6}
|
|
p.SetCHAddr(hw)
|
|
p.SetCIAddr([]byte{0, 0, 0, 0})
|
|
opt = make(dhcp4.Options, 10)
|
|
opt[dhcp4.OptionRequestedIPAddress] = []byte{1, 1, 1, 1}
|
|
p2 = s.handleDHCP4Request(p, opt)
|
|
opt = p2.ParseOptions()
|
|
check(t, bytes.Equal(opt[dhcp4.OptionDHCPMessageType], []byte{byte(dhcp4.ACK)}), "dhcp4.ACK")
|
|
check(t, bytes.Equal(p2.YIAddr(), []byte{1, 1, 1, 1}), "p2.YIAddr")
|
|
check(t, bytes.Equal(p2.CHAddr(), hw), "p2.CHAddr")
|
|
check(t, bytes.Equal(opt[dhcp4.OptionIPAddressLeaseTime], dhcp4.OptionsLeaseTime(5*time.Second)), "OptionIPAddressLeaseTime")
|
|
check(t, bytes.Equal(opt[dhcp4.OptionServerIdentifier], s.ipnet.IP), "OptionServerIdentifier")
|
|
|
|
check(t, bytes.Equal(s.FindIPbyMAC(hw), []byte{1, 1, 1, 1}), "FindIPbyMAC")
|
|
|
|
// Commit the previously reserved lease #2
|
|
hw = []byte{2, 2, 3, 4, 5, 6}
|
|
p.SetCHAddr(hw)
|
|
p.SetCIAddr([]byte{0, 0, 0, 0})
|
|
opt = make(dhcp4.Options, 10)
|
|
opt[dhcp4.OptionRequestedIPAddress] = []byte{1, 1, 1, 2}
|
|
p2 = s.handleDHCP4Request(p, opt)
|
|
check(t, bytes.Equal(p2.YIAddr(), []byte{1, 1, 1, 2}), "p2.YIAddr")
|
|
|
|
// Reserve an IP - we have no more available IPs
|
|
hw = []byte{3, 2, 3, 4, 5, 6}
|
|
p.SetCHAddr(hw)
|
|
lease, _ = s.reserveLease(p)
|
|
check(t, lease == nil, "lease == nil")
|
|
|
|
s.reset()
|
|
testStaticLeases(t, &s)
|
|
testStaticLeaseReplaceByMAC(t, &s)
|
|
|
|
s.reset()
|
|
misc(t, &s)
|
|
}
|
|
|
|
func testStaticLeases(t *testing.T, s *Server) {
|
|
var err error
|
|
var l Lease
|
|
l.IP = []byte{1, 1, 1, 1}
|
|
|
|
l.HWAddr = []byte{1, 2, 3, 4, 5, 6}
|
|
s.leases = append(s.leases, &l)
|
|
|
|
// replace dynamic lease with a static (same IP)
|
|
l.HWAddr = []byte{2, 2, 3, 4, 5, 6}
|
|
err = s.AddStaticLease(l)
|
|
check(t, err == nil, "AddStaticLease")
|
|
|
|
ll := s.Leases(LeasesAll)
|
|
assert.True(t, len(ll) == 1)
|
|
assert.True(t, bytes.Equal(ll[0].IP, []byte{1, 1, 1, 1}))
|
|
assert.True(t, bytes.Equal(ll[0].HWAddr, []byte{2, 2, 3, 4, 5, 6}))
|
|
assert.True(t, ll[0].Expiry.Unix() == leaseExpireStatic)
|
|
|
|
err = s.RemoveStaticLease(l)
|
|
assert.True(t, err == nil)
|
|
|
|
ll = s.Leases(LeasesAll)
|
|
assert.True(t, len(ll) == 0)
|
|
}
|
|
|
|
func testStaticLeaseReplaceByMAC(t *testing.T, s *Server) {
|
|
var err error
|
|
var l Lease
|
|
l.HWAddr = []byte{1, 2, 3, 4, 5, 6}
|
|
|
|
l.IP = []byte{1, 1, 1, 1}
|
|
l.Expiry = time.Now().Add(time.Hour)
|
|
s.leases = append(s.leases, &l)
|
|
|
|
// replace dynamic lease with a static (same MAC)
|
|
l.IP = []byte{2, 1, 1, 1}
|
|
err = s.AddStaticLease(l)
|
|
assert.True(t, err == nil)
|
|
|
|
ll := s.Leases(LeasesAll)
|
|
assert.True(t, len(ll) == 1)
|
|
assert.True(t, bytes.Equal(ll[0].IP, []byte{2, 1, 1, 1}))
|
|
assert.True(t, bytes.Equal(ll[0].HWAddr, []byte{1, 2, 3, 4, 5, 6}))
|
|
}
|
|
|
|
// Small tests that don't require a static server's state
|
|
func misc(t *testing.T, s *Server) {
|
|
var p, p2 dhcp4.Packet
|
|
var hw net.HardwareAddr
|
|
var opt dhcp4.Options
|
|
|
|
p = make(dhcp4.Packet, 241)
|
|
|
|
// Try to commit a lease for an IP without prior Discover-Offer packets
|
|
hw = []byte{2, 2, 3, 4, 5, 6}
|
|
p.SetCHAddr(hw)
|
|
p.SetCIAddr([]byte{0, 0, 0, 0})
|
|
opt = make(dhcp4.Options, 10)
|
|
opt[dhcp4.OptionRequestedIPAddress] = []byte{1, 1, 1, 1}
|
|
p2 = s.handleDHCP4Request(p, opt)
|
|
opt = p2.ParseOptions()
|
|
check(t, bytes.Equal(opt[dhcp4.OptionDHCPMessageType], []byte{byte(dhcp4.NAK)}), "dhcp4.NAK")
|
|
}
|
|
|
|
// Leases database store/load
|
|
func TestDB(t *testing.T) {
|
|
var s = Server{}
|
|
s.conf.DBFilePath = dbFilename
|
|
var p dhcp4.Packet
|
|
var hw1, hw2 net.HardwareAddr
|
|
var lease *Lease
|
|
|
|
s.reset()
|
|
s.leaseStart = []byte{1, 1, 1, 1}
|
|
s.leaseStop = []byte{1, 1, 1, 2}
|
|
s.leaseTime = 5 * time.Second
|
|
s.leaseOptions = dhcp4.Options{}
|
|
s.ipnet = &net.IPNet{
|
|
IP: []byte{1, 2, 3, 4},
|
|
Mask: []byte{0xff, 0xff, 0xff, 0xff},
|
|
}
|
|
|
|
p = make(dhcp4.Packet, 241)
|
|
|
|
hw1 = []byte{1, 2, 3, 4, 5, 6}
|
|
p.SetCHAddr(hw1)
|
|
lease, _ = s.reserveLease(p)
|
|
lease.Expiry = time.Unix(4000000001, 0)
|
|
|
|
hw2 = []byte{2, 2, 3, 4, 5, 6}
|
|
p.SetCHAddr(hw2)
|
|
lease, _ = s.reserveLease(p)
|
|
lease.Expiry = time.Unix(4000000002, 0)
|
|
|
|
_ = os.Remove("leases.db")
|
|
s.dbStore()
|
|
s.reset()
|
|
|
|
s.dbLoad()
|
|
check(t, bytes.Equal(s.leases[0].HWAddr, hw1), "leases[0].HWAddr")
|
|
check(t, bytes.Equal(s.leases[0].IP, []byte{1, 1, 1, 1}), "leases[0].IP")
|
|
check(t, s.leases[0].Expiry.Unix() == 4000000001, "leases[0].Expiry")
|
|
|
|
check(t, bytes.Equal(s.leases[1].HWAddr, hw2), "leases[1].HWAddr")
|
|
check(t, bytes.Equal(s.leases[1].IP, []byte{1, 1, 1, 2}), "leases[1].IP")
|
|
check(t, s.leases[1].Expiry.Unix() == 4000000002, "leases[1].Expiry")
|
|
|
|
_ = os.Remove("leases.db")
|
|
}
|
|
|
|
func TestIsValidSubnetMask(t *testing.T) {
|
|
if !isValidSubnetMask([]byte{255, 255, 255, 0}) {
|
|
t.Fatalf("isValidSubnetMask([]byte{255,255,255,0})")
|
|
}
|
|
if isValidSubnetMask([]byte{255, 255, 253, 0}) {
|
|
t.Fatalf("isValidSubnetMask([]byte{255,255,253,0})")
|
|
}
|
|
if isValidSubnetMask([]byte{0, 255, 255, 255}) {
|
|
t.Fatalf("isValidSubnetMask([]byte{255,255,253,0})")
|
|
}
|
|
}
|
|
|
|
func TestNormalizeLeases(t *testing.T) {
|
|
dynLeases := []*Lease{}
|
|
staticLeases := []*Lease{}
|
|
leases := []*Lease{}
|
|
|
|
lease := &Lease{}
|
|
lease.HWAddr = []byte{1, 2, 3, 4}
|
|
dynLeases = append(dynLeases, lease)
|
|
lease = new(Lease)
|
|
lease.HWAddr = []byte{1, 2, 3, 5}
|
|
dynLeases = append(dynLeases, lease)
|
|
|
|
lease = new(Lease)
|
|
lease.HWAddr = []byte{1, 2, 3, 4}
|
|
lease.IP = []byte{0, 2, 3, 4}
|
|
staticLeases = append(staticLeases, lease)
|
|
lease = new(Lease)
|
|
lease.HWAddr = []byte{2, 2, 3, 4}
|
|
staticLeases = append(staticLeases, lease)
|
|
|
|
leases = normalizeLeases(staticLeases, dynLeases)
|
|
|
|
assert.True(t, len(leases) == 3)
|
|
assert.True(t, bytes.Equal(leases[0].HWAddr, []byte{1, 2, 3, 4}))
|
|
assert.True(t, bytes.Equal(leases[0].IP, []byte{0, 2, 3, 4}))
|
|
assert.True(t, bytes.Equal(leases[1].HWAddr, []byte{2, 2, 3, 4}))
|
|
assert.True(t, bytes.Equal(leases[2].HWAddr, []byte{1, 2, 3, 5}))
|
|
}
|