Merge branch 'main' into ssh-rewrite

This commit is contained in:
Viktor Liu
2025-11-03 13:43:29 +01:00
26 changed files with 479 additions and 161 deletions

View File

@@ -56,6 +56,12 @@ const (
var errNatNotSupported = errors.New("nat not supported with userspace firewall")
// serviceKey represents a protocol/port combination for netstack service registry
type serviceKey struct {
protocol gopacket.LayerType
port uint16
}
// RuleSet is a set of rules grouped by a string key
type RuleSet map[string]PeerRule

View File

@@ -4,12 +4,15 @@ import (
"context"
"crypto/tls"
"crypto/x509"
"errors"
"fmt"
"runtime"
"time"
"github.com/cenkalti/backoff/v4"
log "github.com/sirupsen/logrus"
"google.golang.org/grpc"
"google.golang.org/grpc/connectivity"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/credentials/insecure"
"google.golang.org/grpc/keepalive"
@@ -17,6 +20,9 @@ import (
"github.com/netbirdio/netbird/util/embeddedroots"
)
// ErrConnectionShutdown indicates that the connection entered shutdown state before becoming ready
var ErrConnectionShutdown = errors.New("connection shutdown before ready")
// Backoff returns a backoff configuration for gRPC calls
func Backoff(ctx context.Context) backoff.BackOff {
b := backoff.NewExponentialBackOff()
@@ -25,6 +31,26 @@ func Backoff(ctx context.Context) backoff.BackOff {
return backoff.WithContext(b, ctx)
}
// waitForConnectionReady blocks until the connection becomes ready or fails.
// Returns an error if the connection times out, is cancelled, or enters shutdown state.
func waitForConnectionReady(ctx context.Context, conn *grpc.ClientConn) error {
conn.Connect()
state := conn.GetState()
for state != connectivity.Ready && state != connectivity.Shutdown {
if !conn.WaitForStateChange(ctx, state) {
return fmt.Errorf("wait state change from %s: %w", state, ctx.Err())
}
state = conn.GetState()
}
if state == connectivity.Shutdown {
return ErrConnectionShutdown
}
return nil
}
// CreateConnection creates a gRPC client connection with the appropriate transport options.
// The component parameter specifies the WebSocket proxy component path (e.g., "/management", "/signal").
func CreateConnection(ctx context.Context, addr string, tlsEnabled bool, component string) (*grpc.ClientConn, error) {
@@ -42,22 +68,24 @@ func CreateConnection(ctx context.Context, addr string, tlsEnabled bool, compone
}))
}
connCtx, cancel := context.WithTimeout(ctx, 30*time.Second)
defer cancel()
conn, err := grpc.DialContext(
connCtx,
conn, err := grpc.NewClient(
addr,
transportOption,
WithCustomDialer(tlsEnabled, component),
grpc.WithBlock(),
grpc.WithKeepaliveParams(keepalive.ClientParameters{
Time: 30 * time.Second,
Timeout: 10 * time.Second,
}),
)
if err != nil {
log.Printf("DialContext error: %v", err)
return nil, fmt.Errorf("new client: %w", err)
}
ctx, cancel := context.WithTimeout(ctx, 30*time.Second)
defer cancel()
if err := waitForConnectionReady(ctx, conn); err != nil {
_ = conn.Close()
return nil, err
}

View File

@@ -18,7 +18,7 @@ import (
nbnet "github.com/netbirdio/netbird/client/net"
)
func WithCustomDialer(tlsEnabled bool, component string) grpc.DialOption {
func WithCustomDialer(_ bool, _ string) grpc.DialOption {
return grpc.WithContextDialer(func(ctx context.Context, addr string) (net.Conn, error) {
if runtime.GOOS == "linux" {
currentUser, err := user.Current()
@@ -36,7 +36,6 @@ func WithCustomDialer(tlsEnabled bool, component string) grpc.DialOption {
conn, err := nbnet.NewDialer().DialContext(ctx, "tcp", addr)
if err != nil {
log.Errorf("Failed to dial: %s", err)
return nil, fmt.Errorf("nbnet.NewDialer().DialContext: %w", err)
}
return conn, nil

View File

@@ -83,4 +83,3 @@ func TestCacheMiss(t *testing.T) {
t.Fatalf("expected cache miss, got=%v ok=%v", got, ok)
}
}

View File

@@ -14,6 +14,7 @@ import (
"github.com/hashicorp/go-multierror"
"github.com/miekg/dns"
log "github.com/sirupsen/logrus"
"golang.zx2c4.com/wireguard/tun/netstack"
nberrors "github.com/netbirdio/netbird/client/errors"
firewall "github.com/netbirdio/netbird/client/firewall/manager"
@@ -33,7 +34,7 @@ type firewaller interface {
}
type DNSForwarder struct {
listenAddress string
listenAddress netip.AddrPort
ttl uint32
statusRecorder *peer.Status
@@ -47,9 +48,11 @@ type DNSForwarder struct {
firewall firewaller
resolver resolver
cache *cache
wgIface wgIface
}
func NewDNSForwarder(listenAddress string, ttl uint32, firewall firewaller, statusRecorder *peer.Status) *DNSForwarder {
func NewDNSForwarder(listenAddress netip.AddrPort, ttl uint32, firewall firewaller, statusRecorder *peer.Status, wgIface wgIface) *DNSForwarder {
log.Debugf("creating DNS forwarder with listen_address=%s ttl=%d", listenAddress, ttl)
return &DNSForwarder{
listenAddress: listenAddress,
@@ -58,30 +61,46 @@ func NewDNSForwarder(listenAddress string, ttl uint32, firewall firewaller, stat
statusRecorder: statusRecorder,
resolver: net.DefaultResolver,
cache: newCache(),
wgIface: wgIface,
}
}
func (f *DNSForwarder) Listen(entries []*ForwarderEntry) error {
log.Infof("starting DNS forwarder on address=%s", f.listenAddress)
var netstackNet *netstack.Net
if f.wgIface != nil {
netstackNet = f.wgIface.GetNet()
}
addrDesc := f.listenAddress.String()
if netstackNet != nil {
addrDesc = fmt.Sprintf("netstack %s", f.listenAddress)
}
log.Infof("starting DNS forwarder on address=%s", addrDesc)
udpLn, err := f.createUDPListener(netstackNet)
if err != nil {
return fmt.Errorf("create UDP listener: %w", err)
}
tcpLn, err := f.createTCPListener(netstackNet)
if err != nil {
return fmt.Errorf("create TCP listener: %w", err)
}
// UDP server
mux := dns.NewServeMux()
f.mux = mux
mux.HandleFunc(".", f.handleDNSQueryUDP)
f.dnsServer = &dns.Server{
Addr: f.listenAddress,
Net: "udp",
Handler: mux,
PacketConn: udpLn,
Handler: mux,
}
// TCP server
tcpMux := dns.NewServeMux()
f.tcpMux = tcpMux
tcpMux.HandleFunc(".", f.handleDNSQueryTCP)
f.tcpServer = &dns.Server{
Addr: f.listenAddress,
Net: "tcp",
Handler: tcpMux,
Listener: tcpLn,
Handler: tcpMux,
}
f.UpdateDomains(entries)
@@ -89,18 +108,33 @@ func (f *DNSForwarder) Listen(entries []*ForwarderEntry) error {
errCh := make(chan error, 2)
go func() {
log.Infof("DNS UDP listener running on %s", f.listenAddress)
errCh <- f.dnsServer.ListenAndServe()
log.Infof("DNS UDP listener running on %s", addrDesc)
errCh <- f.dnsServer.ActivateAndServe()
}()
go func() {
log.Infof("DNS TCP listener running on %s", f.listenAddress)
errCh <- f.tcpServer.ListenAndServe()
log.Infof("DNS TCP listener running on %s", addrDesc)
errCh <- f.tcpServer.ActivateAndServe()
}()
// return the first error we get (e.g. bind failure or shutdown)
return <-errCh
}
func (f *DNSForwarder) createUDPListener(netstackNet *netstack.Net) (net.PacketConn, error) {
if netstackNet != nil {
return netstackNet.ListenUDPAddrPort(f.listenAddress)
}
return net.ListenUDP("udp", net.UDPAddrFromAddrPort(f.listenAddress))
}
func (f *DNSForwarder) createTCPListener(netstackNet *netstack.Net) (net.Listener, error) {
if netstackNet != nil {
return netstackNet.ListenTCPAddrPort(f.listenAddress)
}
return net.ListenTCP("tcp", net.TCPAddrFromAddrPort(f.listenAddress))
}
func (f *DNSForwarder) UpdateDomains(entries []*ForwarderEntry) {
f.mutex.Lock()
defer f.mutex.Unlock()

View File

@@ -297,7 +297,7 @@ func TestDNSForwarder_UnauthorizedDomainAccess(t *testing.T) {
mockResolver.On("LookupNetIP", mock.Anything, "ip4", dns.Fqdn(tt.queryDomain)).Return([]netip.Addr{fakeIP}, nil)
}
forwarder := NewDNSForwarder("127.0.0.1:0", 300, mockFirewall, &peer.Status{})
forwarder := NewDNSForwarder(netip.MustParseAddrPort("127.0.0.1:0"), 300, mockFirewall, &peer.Status{}, nil)
forwarder.resolver = mockResolver
d, err := domain.FromString(tt.configuredDomain)
@@ -402,7 +402,7 @@ func TestDNSForwarder_FirewallSetUpdates(t *testing.T) {
mockResolver := &MockResolver{}
// Set up forwarder
forwarder := NewDNSForwarder("127.0.0.1:0", 300, mockFirewall, &peer.Status{})
forwarder := NewDNSForwarder(netip.MustParseAddrPort("127.0.0.1:0"), 300, mockFirewall, &peer.Status{}, nil)
forwarder.resolver = mockResolver
// Create entries and track sets
@@ -489,7 +489,7 @@ func TestDNSForwarder_MultipleIPsInSingleUpdate(t *testing.T) {
mockFirewall := &MockFirewall{}
mockResolver := &MockResolver{}
forwarder := NewDNSForwarder("127.0.0.1:0", 300, mockFirewall, &peer.Status{})
forwarder := NewDNSForwarder(netip.MustParseAddrPort("127.0.0.1:0"), 300, mockFirewall, &peer.Status{}, nil)
forwarder.resolver = mockResolver
// Configure a single domain
@@ -584,7 +584,7 @@ func TestDNSForwarder_ResponseCodes(t *testing.T) {
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
forwarder := NewDNSForwarder("127.0.0.1:0", 300, nil, &peer.Status{})
forwarder := NewDNSForwarder(netip.MustParseAddrPort("127.0.0.1:0"), 300, nil, &peer.Status{}, nil)
d, err := domain.FromString(tt.configured)
require.NoError(t, err)
@@ -616,7 +616,7 @@ func TestDNSForwarder_ResponseCodes(t *testing.T) {
func TestDNSForwarder_TCPTruncation(t *testing.T) {
// Test that large UDP responses are truncated with TC bit set
mockResolver := &MockResolver{}
forwarder := NewDNSForwarder("127.0.0.1:0", 300, nil, &peer.Status{})
forwarder := NewDNSForwarder(netip.MustParseAddrPort("127.0.0.1:0"), 300, nil, &peer.Status{}, nil)
forwarder.resolver = mockResolver
d, _ := domain.FromString("example.com")
@@ -652,7 +652,7 @@ func TestDNSForwarder_TCPTruncation(t *testing.T) {
// a subsequent upstream failure still returns a successful response from cache.
func TestDNSForwarder_ServeFromCacheOnUpstreamFailure(t *testing.T) {
mockResolver := &MockResolver{}
forwarder := NewDNSForwarder("127.0.0.1:0", 300, nil, &peer.Status{})
forwarder := NewDNSForwarder(netip.MustParseAddrPort("127.0.0.1:0"), 300, nil, &peer.Status{}, nil)
forwarder.resolver = mockResolver
d, err := domain.FromString("example.com")
@@ -696,7 +696,7 @@ func TestDNSForwarder_ServeFromCacheOnUpstreamFailure(t *testing.T) {
// Verifies that cache normalization works across casing and trailing dot variations.
func TestDNSForwarder_CacheNormalizationCasingAndDot(t *testing.T) {
mockResolver := &MockResolver{}
forwarder := NewDNSForwarder("127.0.0.1:0", 300, nil, &peer.Status{})
forwarder := NewDNSForwarder(netip.MustParseAddrPort("127.0.0.1:0"), 300, nil, &peer.Status{}, nil)
forwarder.resolver = mockResolver
d, err := domain.FromString("ExAmPlE.CoM")
@@ -742,7 +742,7 @@ func TestDNSForwarder_MultipleOverlappingPatterns(t *testing.T) {
mockFirewall := &MockFirewall{}
mockResolver := &MockResolver{}
forwarder := NewDNSForwarder("127.0.0.1:0", 300, mockFirewall, &peer.Status{})
forwarder := NewDNSForwarder(netip.MustParseAddrPort("127.0.0.1:0"), 300, mockFirewall, &peer.Status{}, nil)
forwarder.resolver = mockResolver
// Set up complex overlapping patterns
@@ -804,7 +804,7 @@ func TestDNSForwarder_NodataVsNxdomain(t *testing.T) {
mockFirewall := &MockFirewall{}
mockResolver := &MockResolver{}
forwarder := NewDNSForwarder("127.0.0.1:0", 300, mockFirewall, &peer.Status{})
forwarder := NewDNSForwarder(netip.MustParseAddrPort("127.0.0.1:0"), 300, mockFirewall, &peer.Status{}, nil)
forwarder.resolver = mockResolver
d, err := domain.FromString("example.com")
@@ -925,7 +925,7 @@ func TestDNSForwarder_NodataVsNxdomain(t *testing.T) {
func TestDNSForwarder_EmptyQuery(t *testing.T) {
// Test handling of malformed query with no questions
forwarder := NewDNSForwarder("127.0.0.1:0", 300, nil, &peer.Status{})
forwarder := NewDNSForwarder(netip.MustParseAddrPort("127.0.0.1:0"), 300, nil, &peer.Status{}, nil)
query := &dns.Msg{}
// Don't set any question

View File

@@ -10,9 +10,11 @@ import (
"github.com/hashicorp/go-multierror"
log "github.com/sirupsen/logrus"
"golang.zx2c4.com/wireguard/tun/netstack"
nberrors "github.com/netbirdio/netbird/client/errors"
firewall "github.com/netbirdio/netbird/client/firewall/manager"
"github.com/netbirdio/netbird/client/iface/wgaddr"
"github.com/netbirdio/netbird/client/internal/peer"
nbdns "github.com/netbirdio/netbird/dns"
"github.com/netbirdio/netbird/route"
@@ -24,6 +26,12 @@ const (
envServerPort = "NB_DNS_FORWARDER_PORT"
)
// wgIface defines the interface for WireGuard interface operations needed by the DNS forwarder.
type wgIface interface {
GetNet() *netstack.Net
Address() wgaddr.Address
}
// ForwarderEntry is a mapping from a domain to a resource ID and a hash of the parent domain list.
type ForwarderEntry struct {
Domain domain.Domain
@@ -34,7 +42,7 @@ type ForwarderEntry struct {
type Manager struct {
firewall firewall.Manager
statusRecorder *peer.Status
localAddr netip.Addr
wgIface wgIface
serverPort uint16
fwRules []firewall.Rule
@@ -42,7 +50,7 @@ type Manager struct {
dnsForwarder *DNSForwarder
}
func NewManager(fw firewall.Manager, statusRecorder *peer.Status, localAddr netip.Addr) *Manager {
func NewManager(fw firewall.Manager, statusRecorder *peer.Status, wgIface wgIface) *Manager {
serverPort := nbdns.ForwarderServerPort
if envPort := os.Getenv(envServerPort); envPort != "" {
if port, err := strconv.ParseUint(envPort, 10, 16); err == nil && port > 0 {
@@ -56,7 +64,7 @@ func NewManager(fw firewall.Manager, statusRecorder *peer.Status, localAddr neti
return &Manager{
firewall: fw,
statusRecorder: statusRecorder,
localAddr: localAddr,
wgIface: wgIface,
serverPort: serverPort,
}
}
@@ -71,21 +79,25 @@ func (m *Manager) Start(fwdEntries []*ForwarderEntry) error {
return err
}
if m.localAddr.IsValid() && m.firewall != nil {
if err := m.firewall.AddInboundDNAT(m.localAddr, firewall.ProtocolUDP, nbdns.ForwarderClientPort, m.serverPort); err != nil {
localAddr := m.wgIface.Address().IP
if localAddr.IsValid() && m.firewall != nil {
if err := m.firewall.AddInboundDNAT(localAddr, firewall.ProtocolUDP, nbdns.ForwarderClientPort, m.serverPort); err != nil {
log.Warnf("failed to add DNS UDP DNAT rule: %v", err)
} else {
log.Infof("added DNS UDP DNAT rule: %s:%d -> %s:%d", m.localAddr, nbdns.ForwarderClientPort, m.localAddr, m.serverPort)
log.Infof("added DNS UDP DNAT rule: %s:%d -> %s:%d", localAddr, nbdns.ForwarderClientPort, localAddr, m.serverPort)
}
if err := m.firewall.AddInboundDNAT(m.localAddr, firewall.ProtocolTCP, nbdns.ForwarderClientPort, m.serverPort); err != nil {
if err := m.firewall.AddInboundDNAT(localAddr, firewall.ProtocolTCP, nbdns.ForwarderClientPort, m.serverPort); err != nil {
log.Warnf("failed to add DNS TCP DNAT rule: %v", err)
} else {
log.Infof("added DNS TCP DNAT rule: %s:%d -> %s:%d", m.localAddr, nbdns.ForwarderClientPort, m.localAddr, m.serverPort)
log.Infof("added DNS TCP DNAT rule: %s:%d -> %s:%d", localAddr, nbdns.ForwarderClientPort, localAddr, m.serverPort)
}
}
m.dnsForwarder = NewDNSForwarder(fmt.Sprintf(":%d", m.serverPort), dnsTTL, m.firewall, m.statusRecorder)
listenAddress := netip.AddrPortFrom(localAddr, m.serverPort)
m.dnsForwarder = NewDNSForwarder(listenAddress, dnsTTL, m.firewall, m.statusRecorder, m.wgIface)
go func() {
if err := m.dnsForwarder.Listen(fwdEntries); err != nil {
// todo handle close error if it is exists
@@ -111,12 +123,13 @@ func (m *Manager) Stop(ctx context.Context) error {
var mErr *multierror.Error
if m.localAddr.IsValid() && m.firewall != nil {
if err := m.firewall.RemoveInboundDNAT(m.localAddr, firewall.ProtocolUDP, nbdns.ForwarderClientPort, m.serverPort); err != nil {
localAddr := m.wgIface.Address().IP
if localAddr.IsValid() && m.firewall != nil {
if err := m.firewall.RemoveInboundDNAT(localAddr, firewall.ProtocolUDP, nbdns.ForwarderClientPort, m.serverPort); err != nil {
mErr = multierror.Append(mErr, fmt.Errorf("remove DNS UDP DNAT rule: %w", err))
}
if err := m.firewall.RemoveInboundDNAT(m.localAddr, firewall.ProtocolTCP, nbdns.ForwarderClientPort, m.serverPort); err != nil {
if err := m.firewall.RemoveInboundDNAT(localAddr, firewall.ProtocolTCP, nbdns.ForwarderClientPort, m.serverPort); err != nil {
mErr = multierror.Append(mErr, fmt.Errorf("remove DNS TCP DNAT rule: %w", err))
}
}

View File

@@ -1013,10 +1013,14 @@ func (e *Engine) updateNetworkMap(networkMap *mgmProto.NetworkMap) error {
protoDNSConfig = &mgmProto.DNSConfig{}
}
if err := e.dnsServer.UpdateDNSServer(serial, toDNSConfig(protoDNSConfig, e.wgInterface.Address().Network)); err != nil {
dnsConfig := toDNSConfig(protoDNSConfig, e.wgInterface.Address().Network)
if err := e.dnsServer.UpdateDNSServer(serial, dnsConfig); err != nil {
log.Errorf("failed to update dns server, err: %v", err)
}
e.routeManager.SetDNSForwarderPort(dnsConfig.ForwarderPort)
// apply routes first, route related actions might depend on routing being enabled
routes := toRoutes(networkMap.GetRoutes())
serverRoutes, clientRoutes := e.routeManager.ClassifyRoutes(routes)
@@ -1155,10 +1159,16 @@ func toRouteDomains(myPubKey string, routes []*route.Route) []*dnsfwd.ForwarderE
}
func toDNSConfig(protoDNSConfig *mgmProto.DNSConfig, network netip.Prefix) nbdns.Config {
forwarderPort := uint16(protoDNSConfig.GetForwarderPort())
if forwarderPort == 0 {
forwarderPort = nbdns.ForwarderClientPort
}
dnsUpdate := nbdns.Config{
ServiceEnable: protoDNSConfig.GetServiceEnable(),
CustomZones: make([]nbdns.CustomZone, 0),
NameServerGroups: make([]*nbdns.NameServerGroup, 0),
ForwarderPort: forwarderPort,
}
for _, zone := range protoDNSConfig.GetCustomZones() {
@@ -1791,35 +1801,69 @@ func (e *Engine) updateDNSForwarder(
}
if !enabled {
if e.dnsForwardMgr == nil {
return
}
if err := e.dnsForwardMgr.Stop(context.Background()); err != nil {
log.Errorf("failed to stop DNS forward: %v", err)
}
e.stopDNSForwarder()
return
}
if len(fwdEntries) > 0 {
if e.dnsForwardMgr == nil {
localAddr := e.wgInterface.Address().IP
e.dnsForwardMgr = dnsfwd.NewManager(e.firewall, e.statusRecorder, localAddr)
if err := e.dnsForwardMgr.Start(fwdEntries); err != nil {
log.Errorf("failed to start DNS forward: %v", err)
e.dnsForwardMgr = nil
}
log.Infof("started domain router service with %d entries", len(fwdEntries))
e.startDNSForwarder(fwdEntries)
} else {
e.dnsForwardMgr.UpdateDomains(fwdEntries)
}
} else if e.dnsForwardMgr != nil {
log.Infof("disable domain router service")
if err := e.dnsForwardMgr.Stop(context.Background()); err != nil {
log.Errorf("failed to stop DNS forward: %v", err)
}
e.stopDNSForwarder()
}
}
func (e *Engine) startDNSForwarder(fwdEntries []*dnsfwd.ForwarderEntry) {
e.dnsForwardMgr = dnsfwd.NewManager(e.firewall, e.statusRecorder, e.wgInterface)
e.registerDNSServices()
if err := e.dnsForwardMgr.Start(fwdEntries); err != nil {
log.Errorf("failed to start DNS forward: %v", err)
e.dnsForwardMgr = nil
return
}
log.Infof("started domain router service with %d entries", len(fwdEntries))
}
func (e *Engine) stopDNSForwarder() {
if e.dnsForwardMgr == nil {
return
}
if err := e.dnsForwardMgr.Stop(context.Background()); err != nil {
log.Errorf("failed to stop DNS forward: %v", err)
}
e.unregisterDNSServices()
e.dnsForwardMgr = nil
}
func (e *Engine) registerDNSServices() {
if netstackNet := e.wgInterface.GetNet(); netstackNet != nil {
if registrar, ok := e.firewall.(interface {
RegisterNetstackService(protocol nftypes.Protocol, port uint16)
}); ok {
registrar.RegisterNetstackService(nftypes.UDP, nbdns.ForwarderServerPort)
registrar.RegisterNetstackService(nftypes.TCP, nbdns.ForwarderServerPort)
log.Debugf("registered DNS forwarder service with netstack for UDP/TCP:%d", nbdns.ForwarderServerPort)
}
}
}
func (e *Engine) unregisterDNSServices() {
if netstackNet := e.wgInterface.GetNet(); netstackNet != nil {
if registrar, ok := e.firewall.(interface {
UnregisterNetstackService(protocol nftypes.Protocol, port uint16)
}); ok {
registrar.UnregisterNetstackService(nftypes.UDP, nbdns.ForwarderServerPort)
registrar.UnregisterNetstackService(nftypes.TCP, nbdns.ForwarderServerPort)
log.Debugf("unregistered DNS forwarder service with netstack for UDP/TCP:%d", nbdns.ForwarderServerPort)
}
}
}

View File

@@ -1,4 +1,4 @@
//go:build (darwin && !ios) || dragonfly || freebsd || netbsd || openbsd
//go:build dragonfly || freebsd || netbsd || openbsd
package networkmonitor
@@ -6,21 +6,19 @@ import (
"context"
"errors"
"fmt"
"syscall"
"unsafe"
log "github.com/sirupsen/logrus"
"golang.org/x/net/route"
"golang.org/x/sys/unix"
"github.com/netbirdio/netbird/client/internal/routemanager/systemops"
)
func checkChange(ctx context.Context, nexthopv4, nexthopv6 systemops.Nexthop) error {
fd, err := unix.Socket(syscall.AF_ROUTE, syscall.SOCK_RAW, syscall.AF_UNSPEC)
fd, err := prepareFd()
if err != nil {
return fmt.Errorf("open routing socket: %v", err)
}
defer func() {
err := unix.Close(fd)
if err != nil && !errors.Is(err, unix.EBADF) {
@@ -28,72 +26,5 @@ func checkChange(ctx context.Context, nexthopv4, nexthopv6 systemops.Nexthop) er
}
}()
for {
select {
case <-ctx.Done():
return ctx.Err()
default:
buf := make([]byte, 2048)
n, err := unix.Read(fd, buf)
if err != nil {
if !errors.Is(err, unix.EBADF) && !errors.Is(err, unix.EINVAL) {
log.Warnf("Network monitor: failed to read from routing socket: %v", err)
}
continue
}
if n < unix.SizeofRtMsghdr {
log.Debugf("Network monitor: read from routing socket returned less than expected: %d bytes", n)
continue
}
msg := (*unix.RtMsghdr)(unsafe.Pointer(&buf[0]))
switch msg.Type {
// handle route changes
case unix.RTM_ADD, syscall.RTM_DELETE:
route, err := parseRouteMessage(buf[:n])
if err != nil {
log.Debugf("Network monitor: error parsing routing message: %v", err)
continue
}
if route.Dst.Bits() != 0 {
continue
}
intf := "<nil>"
if route.Interface != nil {
intf = route.Interface.Name
}
switch msg.Type {
case unix.RTM_ADD:
log.Infof("Network monitor: default route changed: via %s, interface %s", route.Gw, intf)
return nil
case unix.RTM_DELETE:
if nexthopv4.Intf != nil && route.Gw.Compare(nexthopv4.IP) == 0 || nexthopv6.Intf != nil && route.Gw.Compare(nexthopv6.IP) == 0 {
log.Infof("Network monitor: default route removed: via %s, interface %s", route.Gw, intf)
return nil
}
}
}
}
}
}
func parseRouteMessage(buf []byte) (*systemops.Route, error) {
msgs, err := route.ParseRIB(route.RIBTypeRoute, buf)
if err != nil {
return nil, fmt.Errorf("parse RIB: %v", err)
}
if len(msgs) != 1 {
return nil, fmt.Errorf("unexpected RIB message msgs: %v", msgs)
}
msg, ok := msgs[0].(*route.RouteMessage)
if !ok {
return nil, fmt.Errorf("unexpected RIB message type: %T", msgs[0])
}
return systemops.MsgToRoute(msg)
return routeCheck(ctx, fd, nexthopv4, nexthopv6)
}

View File

@@ -0,0 +1,92 @@
//go:build dragonfly || freebsd || netbsd || openbsd || darwin
package networkmonitor
import (
"context"
"errors"
"fmt"
"syscall"
"unsafe"
log "github.com/sirupsen/logrus"
"golang.org/x/net/route"
"golang.org/x/sys/unix"
"github.com/netbirdio/netbird/client/internal/routemanager/systemops"
)
func prepareFd() (int, error) {
return unix.Socket(syscall.AF_ROUTE, syscall.SOCK_RAW, syscall.AF_UNSPEC)
}
func routeCheck(ctx context.Context, fd int, nexthopv4, nexthopv6 systemops.Nexthop) error {
for {
select {
case <-ctx.Done():
return ctx.Err()
default:
buf := make([]byte, 2048)
n, err := unix.Read(fd, buf)
if err != nil {
if !errors.Is(err, unix.EBADF) && !errors.Is(err, unix.EINVAL) {
log.Warnf("Network monitor: failed to read from routing socket: %v", err)
}
continue
}
if n < unix.SizeofRtMsghdr {
log.Debugf("Network monitor: read from routing socket returned less than expected: %d bytes", n)
continue
}
msg := (*unix.RtMsghdr)(unsafe.Pointer(&buf[0]))
switch msg.Type {
// handle route changes
case unix.RTM_ADD, syscall.RTM_DELETE:
route, err := parseRouteMessage(buf[:n])
if err != nil {
log.Debugf("Network monitor: error parsing routing message: %v", err)
continue
}
if route.Dst.Bits() != 0 {
continue
}
intf := "<nil>"
if route.Interface != nil {
intf = route.Interface.Name
}
switch msg.Type {
case unix.RTM_ADD:
log.Infof("Network monitor: default route changed: via %s, interface %s", route.Gw, intf)
return nil
case unix.RTM_DELETE:
if nexthopv4.Intf != nil && route.Gw.Compare(nexthopv4.IP) == 0 || nexthopv6.Intf != nil && route.Gw.Compare(nexthopv6.IP) == 0 {
log.Infof("Network monitor: default route removed: via %s, interface %s", route.Gw, intf)
return nil
}
}
}
}
}
}
func parseRouteMessage(buf []byte) (*systemops.Route, error) {
msgs, err := route.ParseRIB(route.RIBTypeRoute, buf)
if err != nil {
return nil, fmt.Errorf("parse RIB: %v", err)
}
if len(msgs) != 1 {
return nil, fmt.Errorf("unexpected RIB message msgs: %v", msgs)
}
msg, ok := msgs[0].(*route.RouteMessage)
if !ok {
return nil, fmt.Errorf("unexpected RIB message type: %T", msgs[0])
}
return systemops.MsgToRoute(msg)
}

View File

@@ -0,0 +1,149 @@
//go:build darwin && !ios
package networkmonitor
import (
"context"
"errors"
"fmt"
"hash/fnv"
"os/exec"
"time"
log "github.com/sirupsen/logrus"
"golang.org/x/sys/unix"
"github.com/netbirdio/netbird/client/internal/routemanager/systemops"
)
// todo: refactor to not use static functions
func checkChange(ctx context.Context, nexthopv4, nexthopv6 systemops.Nexthop) error {
fd, err := prepareFd()
if err != nil {
return fmt.Errorf("open routing socket: %v", err)
}
defer func() {
if err := unix.Close(fd); err != nil {
if !errors.Is(err, unix.EBADF) {
log.Warnf("Network monitor: failed to close routing socket: %v", err)
}
}
}()
routeChanged := make(chan struct{})
go func() {
_ = routeCheck(ctx, fd, nexthopv4, nexthopv6)
close(routeChanged)
}()
wakeUp := make(chan struct{})
go func() {
wakeUpListen(ctx)
close(wakeUp)
}()
select {
case <-ctx.Done():
return ctx.Err()
case <-routeChanged:
if ctx.Err() != nil {
return ctx.Err()
}
log.Infof("route change detected")
return nil
case <-wakeUp:
if ctx.Err() != nil {
return ctx.Err()
}
log.Infof("wakeup detected")
return nil
}
}
func wakeUpListen(ctx context.Context) {
log.Infof("start to watch for system wakeups")
var (
initialHash uint32
err error
)
// Keep retrying until initial sysctl succeeds or context is canceled
for {
select {
case <-ctx.Done():
log.Info("exit from wakeUpListen initial hash detection due to context cancellation")
return
default:
initialHash, err = readSleepTimeHash()
if err != nil {
log.Errorf("failed to detect initial sleep time: %v", err)
select {
case <-ctx.Done():
log.Info("exit from wakeUpListen initial hash detection due to context cancellation")
return
case <-time.After(3 * time.Second):
continue
}
}
log.Debugf("initial wakeup hash: %d", initialHash)
break
}
break
}
ticker := time.NewTicker(5 * time.Second)
defer ticker.Stop()
for {
select {
case <-ctx.Done():
log.Info("context canceled, stopping wakeUpListen")
return
case <-ticker.C:
newHash, err := readSleepTimeHash()
if err != nil {
log.Errorf("failed to read sleep time hash: %v", err)
continue
}
if newHash == initialHash {
log.Tracef("no wakeup detected")
continue
}
upOut, err := exec.Command("uptime").Output()
if err != nil {
log.Errorf("failed to run uptime command: %v", err)
upOut = []byte("unknown")
}
log.Infof("Wakeup detected: %d -> %d, uptime: %s", initialHash, newHash, upOut)
return
}
}
}
func readSleepTimeHash() (uint32, error) {
cmd := exec.Command("sysctl", "kern.sleeptime")
out, err := cmd.Output()
if err != nil {
return 0, fmt.Errorf("failed to run sysctl: %w", err)
}
h, err := hash(out)
if err != nil {
return 0, fmt.Errorf("failed to compute hash: %w", err)
}
return h, nil
}
func hash(data []byte) (uint32, error) {
hasher := fnv.New32a() // Create a new 32-bit FNV-1a hasher
if _, err := hasher.Write(data); err != nil {
return 0, err
}
return hasher.Sum32(), nil
}

View File

@@ -88,6 +88,7 @@ func (nw *NetworkMonitor) Listen(ctx context.Context) (err error) {
event := make(chan struct{}, 1)
go nw.checkChanges(ctx, event, nexthop4, nexthop6)
log.Infof("start watching for network changes")
// debounce changes
timer := time.NewTimer(0)
timer.Stop()

View File

@@ -1,6 +1,7 @@
package common
import (
"sync/atomic"
"time"
"github.com/netbirdio/netbird/client/firewall/manager"
@@ -25,4 +26,5 @@ type HandlerParams struct {
UseNewDNSRoute bool
Firewall manager.Manager
FakeIPManager *fakeip.Manager
ForwarderPort *atomic.Uint32
}

View File

@@ -8,6 +8,7 @@ import (
"runtime"
"strings"
"sync"
"sync/atomic"
"time"
"github.com/hashicorp/go-multierror"
@@ -20,7 +21,6 @@ import (
nbdns "github.com/netbirdio/netbird/client/internal/dns"
"github.com/netbirdio/netbird/client/internal/peer"
"github.com/netbirdio/netbird/client/internal/peerstore"
pkgdns "github.com/netbirdio/netbird/dns"
"github.com/netbirdio/netbird/client/internal/routemanager/common"
"github.com/netbirdio/netbird/client/internal/routemanager/fakeip"
"github.com/netbirdio/netbird/client/internal/routemanager/refcounter"
@@ -55,6 +55,7 @@ type DnsInterceptor struct {
peerStore *peerstore.Store
firewall firewall.Manager
fakeIPManager *fakeip.Manager
forwarderPort *atomic.Uint32
}
func New(params common.HandlerParams) *DnsInterceptor {
@@ -69,6 +70,7 @@ func New(params common.HandlerParams) *DnsInterceptor {
firewall: params.Firewall,
fakeIPManager: params.FakeIPManager,
interceptedDomains: make(domainMap),
forwarderPort: params.ForwarderPort,
}
}
@@ -257,7 +259,7 @@ func (d *DnsInterceptor) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
r.MsgHdr.AuthenticatedData = true
}
upstream := fmt.Sprintf("%s:%d", upstreamIP.String(), pkgdns.ForwarderClientPort)
upstream := fmt.Sprintf("%s:%d", upstreamIP.String(), uint16(d.forwarderPort.Load()))
ctx, cancel := context.WithTimeout(context.Background(), dnsTimeout)
defer cancel()

View File

@@ -10,6 +10,7 @@ import (
"runtime"
"slices"
"sync"
"sync/atomic"
"time"
"github.com/google/uuid"
@@ -23,6 +24,7 @@ import (
"github.com/netbirdio/netbird/client/iface/netstack"
"github.com/netbirdio/netbird/client/internal/dns"
"github.com/netbirdio/netbird/client/internal/listener"
nbdns "github.com/netbirdio/netbird/dns"
"github.com/netbirdio/netbird/client/internal/peer"
"github.com/netbirdio/netbird/client/internal/peerstore"
"github.com/netbirdio/netbird/client/internal/routemanager/client"
@@ -54,6 +56,7 @@ type Manager interface {
SetRouteChangeListener(listener listener.NetworkChangeListener)
InitialRouteRange() []string
SetFirewall(firewall.Manager) error
SetDNSForwarderPort(port uint16)
Stop(stateManager *statemanager.Manager)
}
@@ -101,6 +104,7 @@ type DefaultManager struct {
disableServerRoutes bool
activeRoutes map[route.HAUniqueID]client.RouteHandler
fakeIPManager *fakeip.Manager
dnsForwarderPort atomic.Uint32
}
func NewManager(config ManagerConfig) *DefaultManager {
@@ -130,6 +134,7 @@ func NewManager(config ManagerConfig) *DefaultManager {
disableServerRoutes: config.DisableServerRoutes,
activeRoutes: make(map[route.HAUniqueID]client.RouteHandler),
}
dm.dnsForwarderPort.Store(uint32(nbdns.ForwarderClientPort))
useNoop := netstack.IsEnabled() || config.DisableClientRoutes
dm.setupRefCounters(useNoop)
@@ -270,6 +275,11 @@ func (m *DefaultManager) SetFirewall(firewall firewall.Manager) error {
return nil
}
// SetDNSForwarderPort sets the DNS forwarder port for route handlers
func (m *DefaultManager) SetDNSForwarderPort(port uint16) {
m.dnsForwarderPort.Store(uint32(port))
}
// Stop stops the manager watchers and clean firewall rules
func (m *DefaultManager) Stop(stateManager *statemanager.Manager) {
m.stop()
@@ -345,6 +355,7 @@ func (m *DefaultManager) updateSystemRoutes(newRoutes route.HAMap) error {
UseNewDNSRoute: m.useNewDNSRoute,
Firewall: m.firewall,
FakeIPManager: m.fakeIPManager,
ForwarderPort: &m.dnsForwarderPort,
}
handler := client.HandlerFromRoute(params)
if err := handler.AddRoute(m.ctx); err != nil {

View File

@@ -90,6 +90,10 @@ func (m *MockManager) SetFirewall(firewall.Manager) error {
panic("implement me")
}
// SetDNSForwarderPort mock implementation of SetDNSForwarderPort from Manager interface
func (m *MockManager) SetDNSForwarderPort(port uint16) {
}
// Stop mock implementation of Stop from Manager interface
func (m *MockManager) Stop(stateManager *statemanager.Manager) {
if m.StopFunc != nil {

View File

@@ -17,8 +17,7 @@ type Conn struct {
ID hooks.ConnectionID
}
// Close overrides the net.Conn Close method to execute all registered hooks after closing the connection
// Close overrides the net.Conn Close method to execute all registered hooks before closing the connection.
// Close overrides the net.Conn Close method to execute all registered hooks after closing the connection.
func (c *Conn) Close() error {
return closeConn(c.ID, c.Conn)
}
@@ -29,7 +28,7 @@ type TCPConn struct {
ID hooks.ConnectionID
}
// Close overrides the net.TCPConn Close method to execute all registered hooks before closing the connection.
// Close overrides the net.TCPConn Close method to execute all registered hooks after closing the connection.
func (c *TCPConn) Close() error {
return closeConn(c.ID, c.TCPConn)
}
@@ -37,13 +36,16 @@ func (c *TCPConn) Close() error {
// closeConn is a helper function to close connections and execute close hooks.
func closeConn(id hooks.ConnectionID, conn io.Closer) error {
err := conn.Close()
cleanupConnID(id)
return err
}
// cleanupConnID executes close hooks for a connection ID.
func cleanupConnID(id hooks.ConnectionID) {
closeHooks := hooks.GetCloseHooks()
for _, hook := range closeHooks {
if err := hook(id); err != nil {
log.Errorf("Error executing close hook: %v", err)
}
}
return err
}

View File

@@ -74,7 +74,6 @@ func DialTCP(network string, laddr, raddr *net.TCPAddr) (transport.TCPConn, erro
}
return &TCPConn{TCPConn: tcpConn, ID: c.ID}, nil
}
if err := conn.Close(); err != nil {
log.Errorf("failed to close connection: %v", err)
}

View File

@@ -30,6 +30,7 @@ func (d *Dialer) DialContext(ctx context.Context, network, address string) (net.
conn, err := d.Dialer.DialContext(ctx, network, address)
if err != nil {
cleanupConnID(connID)
return nil, fmt.Errorf("d.Dialer.DialContext: %w", err)
}
@@ -64,7 +65,7 @@ func callDialerHooks(ctx context.Context, connID hooks.ConnectionID, address str
ips, err := resolver.LookupIPAddr(ctx, host)
if err != nil {
return fmt.Errorf("failed to resolve address %s: %w", address, err)
return fmt.Errorf("resolve address %s: %w", address, err)
}
log.Debugf("Dialer resolved IPs for %s: %v", address, ips)

View File

@@ -48,7 +48,7 @@ func (c *PacketConn) WriteTo(b []byte, addr net.Addr) (n int, err error) {
return c.PacketConn.WriteTo(b, addr)
}
// Close overrides the net.PacketConn Close method to execute all registered hooks before closing the connection.
// Close overrides the net.PacketConn Close method to execute all registered hooks after closing the connection.
func (c *PacketConn) Close() error {
defer c.seenAddrs.Clear()
return closeConn(c.ID, c.PacketConn)
@@ -69,7 +69,7 @@ func (c *UDPConn) WriteTo(b []byte, addr net.Addr) (n int, err error) {
return c.UDPConn.WriteTo(b, addr)
}
// Close overrides the net.UDPConn Close method to execute all registered hooks before closing the connection.
// Close overrides the net.UDPConn Close method to execute all registered hooks after closing the connection.
func (c *UDPConn) Close() error {
defer c.seenAddrs.Clear()
return closeConn(c.ID, c.UDPConn)

View File

@@ -939,6 +939,7 @@ func (s *serviceClient) onTrayReady() {
newProfileMenuArgs := &newProfileMenuArgs{
ctx: s.ctx,
serviceClient: s,
profileManager: s.profileManager,
eventHandler: s.eventHandler,
profileMenuItem: profileMenuItem,

View File

@@ -35,6 +35,8 @@ type Config struct {
NameServerGroups []*NameServerGroup
// CustomZones contains a list of custom zone
CustomZones []CustomZone
// ForwarderPort is the port clients should connect to on routing peers for DNS forwarding
ForwarderPort uint16
}
// CustomZone represents a custom zone to be resolved by the dns server

4
go.mod
View File

@@ -78,7 +78,7 @@ require (
github.com/pion/turn/v3 v3.0.1
github.com/pkg/sftp v1.13.9
github.com/prometheus/client_golang v1.22.0
github.com/quic-go/quic-go v0.48.2
github.com/quic-go/quic-go v0.49.1
github.com/redis/go-redis/v9 v9.7.3
github.com/rs/xid v1.3.0
github.com/shirou/gopsutil/v3 v3.24.4
@@ -245,7 +245,7 @@ require (
go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.51.0 // indirect
go.opentelemetry.io/otel/sdk v1.35.0 // indirect
go.opentelemetry.io/otel/trace v1.35.0 // indirect
go.uber.org/mock v0.4.0 // indirect
go.uber.org/mock v0.5.0 // indirect
go.uber.org/multierr v1.11.0 // indirect
golang.org/x/image v0.18.0 // indirect
golang.org/x/text v0.28.0 // indirect

8
go.sum
View File

@@ -597,8 +597,8 @@ github.com/prometheus/common v0.62.0 h1:xasJaQlnWAeyHdUBeGjXmutelfJHWMRr+Fg4QszZ
github.com/prometheus/common v0.62.0/go.mod h1:vyBcEuLSvWos9B1+CyL7JZ2up+uFzXhkqml0W5zIY1I=
github.com/prometheus/procfs v0.15.1 h1:YagwOFzUgYfKKHX6Dr+sHT7km/hxC76UB0learggepc=
github.com/prometheus/procfs v0.15.1/go.mod h1:fB45yRUv8NstnjriLhBQLuOUt+WW4BsoGhij/e3PBqk=
github.com/quic-go/quic-go v0.48.2 h1:wsKXZPeGWpMpCGSWqOcqpW2wZYic/8T3aqiOID0/KWE=
github.com/quic-go/quic-go v0.48.2/go.mod h1:yBgs3rWBOADpga7F+jJsb6Ybg1LSYiQvwWlLX+/6HMs=
github.com/quic-go/quic-go v0.49.1 h1:e5JXpUyF0f2uFjckQzD8jTghZrOUK1xxDqqZhlwixo0=
github.com/quic-go/quic-go v0.49.1/go.mod h1:s2wDnmCdooUQBmQfpUSTCYBl1/D4FcqbULMMkASvR6s=
github.com/redis/go-redis/v9 v9.7.3 h1:YpPyAayJV+XErNsatSElgRZZVCwXX9QzkKYNvO7x0wM=
github.com/redis/go-redis/v9 v9.7.3/go.mod h1:bGUrSggJ9X9GUmZpZNEOQKaANxSGgOEBRltRTZHSvrA=
github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
@@ -756,8 +756,8 @@ go.opentelemetry.io/proto/otlp v1.0.0/go.mod h1:Sy6pihPLfYHkr3NkUbEhGHFhINUSI/v8
go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
go.uber.org/mock v0.4.0 h1:VcM4ZOtdbR4f6VXfiOpwpVJDL6lCReaZ6mw31wqh7KU=
go.uber.org/mock v0.4.0/go.mod h1:a6FSlNadKUHUa9IP5Vyt1zh4fC7uAwxMutEAscFbkZc=
go.uber.org/mock v0.5.0 h1:KAMbZvZPyBPWgD14IrIQ38QCyjwpvVVV6K/bHl1IwQU=
go.uber.org/mock v0.5.0/go.mod h1:ge71pBPLYDk7QIi1LupWxdAykm7KIEFchiOqd6z7qMM=
go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9iU=
go.uber.org/multierr v1.11.0 h1:blXXJkSxSSfBVBlC76pxqeO+LN3aDfLQo+309xJstO0=
go.uber.org/multierr v1.11.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=

View File

@@ -55,8 +55,7 @@ func NewClient(ctx context.Context, addr string, ourPrivateKey wgtypes.Key, tlsE
var err error
conn, err = nbgrpc.CreateConnection(ctx, addr, tlsEnabled, wsproxy.ManagementComponent)
if err != nil {
log.Printf("createConnection error: %v", err)
return err
return fmt.Errorf("create connection: %w", err)
}
return nil
}

View File

@@ -60,8 +60,7 @@ func NewClient(ctx context.Context, addr string, key wgtypes.Key, tlsEnabled boo
var err error
conn, err = nbgrpc.CreateConnection(ctx, addr, tlsEnabled, wsproxy.SignalComponent)
if err != nil {
log.Printf("createConnection error: %v", err)
return err
return fmt.Errorf("create connection: %w", err)
}
return nil
}