2022-01-18 16:44:58 +01:00
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package client
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import (
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"context"
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"crypto/tls"
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"fmt"
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2022-02-03 18:35:54 +01:00
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"io"
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2023-03-16 17:22:36 +01:00
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"sync"
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2022-02-03 18:35:54 +01:00
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"time"
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2023-03-16 17:22:36 +01:00
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"google.golang.org/grpc/codes"
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gstatus "google.golang.org/grpc/status"
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2022-01-18 16:44:58 +01:00
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log "github.com/sirupsen/logrus"
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"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
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"google.golang.org/grpc"
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"google.golang.org/grpc/connectivity"
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"google.golang.org/grpc/credentials"
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"google.golang.org/grpc/credentials/insecure"
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"google.golang.org/grpc/keepalive"
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2023-03-16 17:22:36 +01:00
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"github.com/cenkalti/backoff/v4"
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2023-04-10 18:22:25 +02:00
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2023-03-16 17:22:36 +01:00
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"github.com/netbirdio/netbird/client/system"
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"github.com/netbirdio/netbird/encryption"
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"github.com/netbirdio/netbird/management/proto"
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2022-01-18 16:44:58 +01:00
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)
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2024-03-01 15:17:35 +01:00
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const ConnectTimeout = 10 * time.Second
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2023-03-16 17:22:36 +01:00
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// ConnStateNotifier is a wrapper interface of the status recorders
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type ConnStateNotifier interface {
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2024-01-22 12:20:24 +01:00
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MarkManagementDisconnected(error)
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2023-03-16 17:22:36 +01:00
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MarkManagementConnected()
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}
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2022-01-18 16:44:58 +01:00
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type GrpcClient struct {
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2023-03-16 17:22:36 +01:00
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key wgtypes.Key
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realClient proto.ManagementServiceClient
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ctx context.Context
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conn *grpc.ClientConn
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connStateCallback ConnStateNotifier
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connStateCallbackLock sync.RWMutex
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2022-01-18 16:44:58 +01:00
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}
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// NewClient creates a new client to Management service
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func NewClient(ctx context.Context, addr string, ourPrivateKey wgtypes.Key, tlsEnabled bool) (*GrpcClient, error) {
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transportOption := grpc.WithTransportCredentials(insecure.NewCredentials())
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if tlsEnabled {
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transportOption = grpc.WithTransportCredentials(credentials.NewTLS(&tls.Config{}))
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}
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2024-03-01 15:17:35 +01:00
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mgmCtx, cancel := context.WithTimeout(ctx, ConnectTimeout)
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2022-01-18 16:44:58 +01:00
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defer cancel()
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conn, err := grpc.DialContext(
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mgmCtx,
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addr,
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transportOption,
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grpc.WithBlock(),
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grpc.WithKeepaliveParams(keepalive.ClientParameters{
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2023-10-19 10:18:16 +02:00
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Time: 30 * time.Second,
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2022-01-18 16:44:58 +01:00
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Timeout: 10 * time.Second,
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}))
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if err != nil {
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log.Errorf("failed creating connection to Management Service %v", err)
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return nil, err
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}
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realClient := proto.NewManagementServiceClient(conn)
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return &GrpcClient{
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2023-03-16 17:22:36 +01:00
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key: ourPrivateKey,
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realClient: realClient,
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ctx: ctx,
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conn: conn,
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connStateCallbackLock: sync.RWMutex{},
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2022-01-18 16:44:58 +01:00
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}, nil
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}
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// Close closes connection to the Management Service
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func (c *GrpcClient) Close() error {
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return c.conn.Close()
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}
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2023-03-16 17:22:36 +01:00
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// SetConnStateListener set the ConnStateNotifier
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func (c *GrpcClient) SetConnStateListener(notifier ConnStateNotifier) {
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c.connStateCallbackLock.Lock()
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defer c.connStateCallbackLock.Unlock()
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c.connStateCallback = notifier
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}
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2022-03-08 14:47:55 +01:00
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// defaultBackoff is a basic backoff mechanism for general issues
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2022-01-18 16:44:58 +01:00
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func defaultBackoff(ctx context.Context) backoff.BackOff {
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return backoff.WithContext(&backoff.ExponentialBackOff{
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InitialInterval: 800 * time.Millisecond,
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2022-07-02 20:38:16 +02:00
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RandomizationFactor: 1,
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Multiplier: 1.7,
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2022-01-18 16:44:58 +01:00
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MaxInterval: 10 * time.Second,
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MaxElapsedTime: 3 * 30 * 24 * time.Hour, // 3 months
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2022-01-18 16:44:58 +01:00
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Stop: backoff.Stop,
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Clock: backoff.SystemClock,
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}, ctx)
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}
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// ready indicates whether the client is okay and ready to be used
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// for now it just checks whether gRPC connection to the service is ready
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func (c *GrpcClient) ready() bool {
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return c.conn.GetState() == connectivity.Ready || c.conn.GetState() == connectivity.Idle
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}
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// Sync wraps the real client's Sync endpoint call and takes care of retries and encryption/decryption of messages
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// Blocking request. The result will be sent via msgHandler callback function
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func (c *GrpcClient) Sync(msgHandler func(msg *proto.SyncResponse) error) error {
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2022-03-08 14:47:55 +01:00
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backOff := defaultBackoff(c.ctx)
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2022-01-18 16:44:58 +01:00
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operation := func() error {
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log.Debugf("management connection state %v", c.conn.GetState())
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2022-07-02 20:38:16 +02:00
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connState := c.conn.GetState()
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if connState == connectivity.Shutdown {
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return backoff.Permanent(fmt.Errorf("connection to management has been shut down"))
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} else if !(connState == connectivity.Ready || connState == connectivity.Idle) {
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c.conn.WaitForStateChange(c.ctx, connState)
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return fmt.Errorf("connection to management is not ready and in %s state", connState)
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2022-01-18 16:44:58 +01:00
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}
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serverPubKey, err := c.GetServerPublicKey()
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if err != nil {
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2022-07-02 20:38:16 +02:00
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log.Debugf("failed getting Management Service public key: %s", err)
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2022-01-18 16:44:58 +01:00
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return err
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}
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2022-09-26 18:02:20 +02:00
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ctx, cancelStream := context.WithCancel(c.ctx)
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defer cancelStream()
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stream, err := c.connectToStream(ctx, *serverPubKey)
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2022-01-18 16:44:58 +01:00
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if err != nil {
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2022-07-02 20:38:16 +02:00
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log.Debugf("failed to open Management Service stream: %s", err)
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if s, ok := gstatus.FromError(err); ok && s.Code() == codes.PermissionDenied {
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return backoff.Permanent(err) // unrecoverable error, propagate to the upper layer
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}
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2022-01-18 16:44:58 +01:00
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return err
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}
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log.Infof("connected to the Management Service stream")
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2023-03-16 17:22:36 +01:00
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c.notifyConnected()
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2022-01-18 16:44:58 +01:00
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// blocking until error
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err = c.receiveEvents(stream, *serverPubKey, msgHandler)
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if err != nil {
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2023-04-10 18:22:25 +02:00
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s, _ := gstatus.FromError(err)
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switch s.Code() {
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case codes.PermissionDenied:
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2022-07-02 20:38:16 +02:00
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return backoff.Permanent(err) // unrecoverable error, propagate to the upper layer
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2023-04-10 18:22:25 +02:00
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case codes.Canceled:
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log.Debugf("management connection context has been canceled, this usually indicates shutdown")
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return nil
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default:
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backOff.Reset() // reset backoff counter after successful connection
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2024-01-22 12:20:24 +01:00
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c.notifyDisconnected(err)
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2023-04-10 18:22:25 +02:00
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log.Warnf("disconnected from the Management service but will retry silently. Reason: %v", err)
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return err
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2022-05-27 15:26:36 +02:00
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}
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2022-01-18 16:44:58 +01:00
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}
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return nil
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}
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err := backoff.Retry(operation, backOff)
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if err != nil {
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2022-07-02 20:38:16 +02:00
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log.Warnf("exiting the Management service connection retry loop due to the unrecoverable error: %s", err)
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2022-01-18 16:44:58 +01:00
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return err
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}
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return nil
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}
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2023-06-12 14:43:55 +02:00
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// GetNetworkMap return with the network map
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func (c *GrpcClient) GetNetworkMap() (*proto.NetworkMap, error) {
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2023-04-17 11:15:37 +02:00
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serverPubKey, err := c.GetServerPublicKey()
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if err != nil {
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log.Debugf("failed getting Management Service public key: %s", err)
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return nil, err
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}
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ctx, cancelStream := context.WithCancel(c.ctx)
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defer cancelStream()
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stream, err := c.connectToStream(ctx, *serverPubKey)
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if err != nil {
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log.Debugf("failed to open Management Service stream: %s", err)
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return nil, err
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}
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defer func() {
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_ = stream.CloseSend()
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}()
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update, err := stream.Recv()
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if err == io.EOF {
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log.Debugf("Management stream has been closed by server: %s", err)
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return nil, err
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}
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if err != nil {
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log.Debugf("disconnected from Management Service sync stream: %v", err)
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return nil, err
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}
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decryptedResp := &proto.SyncResponse{}
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err = encryption.DecryptMessage(*serverPubKey, c.key, update.Body, decryptedResp)
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if err != nil {
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log.Errorf("failed decrypting update message from Management Service: %s", err)
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return nil, err
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}
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if decryptedResp.GetNetworkMap() == nil {
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return nil, fmt.Errorf("invalid msg, required network map")
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}
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2023-06-12 14:43:55 +02:00
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return decryptedResp.GetNetworkMap(), nil
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2023-04-17 11:15:37 +02:00
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}
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2022-09-26 18:02:20 +02:00
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func (c *GrpcClient) connectToStream(ctx context.Context, serverPubKey wgtypes.Key) (proto.ManagementService_SyncClient, error) {
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2022-01-18 16:44:58 +01:00
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req := &proto.SyncRequest{}
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myPrivateKey := c.key
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myPublicKey := myPrivateKey.PublicKey()
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encryptedReq, err := encryption.EncryptMessage(serverPubKey, myPrivateKey, req)
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if err != nil {
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log.Errorf("failed encrypting message: %s", err)
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return nil, err
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}
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syncReq := &proto.EncryptedMessage{WgPubKey: myPublicKey.String(), Body: encryptedReq}
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2022-09-26 18:02:20 +02:00
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sync, err := c.realClient.Sync(ctx, syncReq)
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if err != nil {
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return nil, err
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}
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return sync, nil
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2022-01-18 16:44:58 +01:00
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}
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func (c *GrpcClient) receiveEvents(stream proto.ManagementService_SyncClient, serverPubKey wgtypes.Key, msgHandler func(msg *proto.SyncResponse) error) error {
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for {
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update, err := stream.Recv()
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if err == io.EOF {
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2022-07-02 20:38:16 +02:00
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log.Debugf("Management stream has been closed by server: %s", err)
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2022-01-18 16:44:58 +01:00
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return err
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}
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if err != nil {
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2022-07-02 20:38:16 +02:00
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log.Debugf("disconnected from Management Service sync stream: %v", err)
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2022-01-18 16:44:58 +01:00
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return err
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}
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log.Debugf("got an update message from Management Service")
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decryptedResp := &proto.SyncResponse{}
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err = encryption.DecryptMessage(serverPubKey, c.key, update.Body, decryptedResp)
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if err != nil {
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log.Errorf("failed decrypting update message from Management Service: %s", err)
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return err
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}
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err = msgHandler(decryptedResp)
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if err != nil {
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log.Errorf("failed handling an update message received from Management Service: %v", err.Error())
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return err
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}
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}
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}
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2022-07-02 20:38:16 +02:00
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// GetServerPublicKey returns server's WireGuard public key (used later for encrypting messages sent to the server)
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2022-01-18 16:44:58 +01:00
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func (c *GrpcClient) GetServerPublicKey() (*wgtypes.Key, error) {
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if !c.ready() {
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return nil, fmt.Errorf("no connection to management")
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}
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2022-07-02 20:38:16 +02:00
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mgmCtx, cancel := context.WithTimeout(c.ctx, 5*time.Second)
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2022-01-18 16:44:58 +01:00
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defer cancel()
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resp, err := c.realClient.GetServerKey(mgmCtx, &proto.Empty{})
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if err != nil {
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return nil, err
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}
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serverKey, err := wgtypes.ParseKey(resp.Key)
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if err != nil {
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return nil, err
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}
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return &serverKey, nil
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}
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2024-01-22 12:20:24 +01:00
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// IsHealthy probes the gRPC connection and returns false on errors
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func (c *GrpcClient) IsHealthy() bool {
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switch c.conn.GetState() {
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case connectivity.TransientFailure:
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return false
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case connectivity.Connecting:
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return true
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case connectivity.Shutdown:
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return true
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case connectivity.Idle:
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case connectivity.Ready:
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}
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ctx, cancel := context.WithTimeout(c.ctx, 1*time.Second)
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defer cancel()
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_, err := c.realClient.GetServerKey(ctx, &proto.Empty{})
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if err != nil {
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c.notifyDisconnected(err)
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log.Warnf("health check returned: %s", err)
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return false
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}
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c.notifyConnected()
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return true
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}
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2022-01-18 16:44:58 +01:00
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func (c *GrpcClient) login(serverKey wgtypes.Key, req *proto.LoginRequest) (*proto.LoginResponse, error) {
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if !c.ready() {
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return nil, fmt.Errorf("no connection to management")
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}
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loginReq, err := encryption.EncryptMessage(serverKey, c.key, req)
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if err != nil {
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log.Errorf("failed to encrypt message: %s", err)
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return nil, err
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}
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2024-03-01 15:17:35 +01:00
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mgmCtx, cancel := context.WithTimeout(c.ctx, ConnectTimeout)
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2022-01-18 16:44:58 +01:00
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defer cancel()
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resp, err := c.realClient.Login(mgmCtx, &proto.EncryptedMessage{
|
|
|
|
WgPubKey: c.key.PublicKey().String(),
|
|
|
|
Body: loginReq,
|
|
|
|
})
|
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
|
|
|
|
loginResp := &proto.LoginResponse{}
|
|
|
|
err = encryption.DecryptMessage(serverKey, c.key, resp.Body, loginResp)
|
|
|
|
if err != nil {
|
|
|
|
log.Errorf("failed to decrypt registration message: %s", err)
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
|
|
|
|
return loginResp, nil
|
|
|
|
}
|
|
|
|
|
|
|
|
// Register registers peer on Management Server. It actually calls a Login endpoint with a provided setup key
|
|
|
|
// Takes care of encrypting and decrypting messages.
|
|
|
|
// This method will also collect system info and send it with the request (e.g. hostname, os, etc)
|
2022-06-23 17:04:53 +02:00
|
|
|
func (c *GrpcClient) Register(serverKey wgtypes.Key, setupKey string, jwtToken string, sysInfo *system.Info, pubSSHKey []byte) (*proto.LoginResponse, error) {
|
|
|
|
keys := &proto.PeerKeys{
|
|
|
|
SshPubKey: pubSSHKey,
|
|
|
|
WgPubKey: []byte(c.key.PublicKey().String()),
|
|
|
|
}
|
|
|
|
return c.login(serverKey, &proto.LoginRequest{SetupKey: setupKey, Meta: infoToMetaData(sysInfo), JwtToken: jwtToken, PeerKeys: keys})
|
2022-01-18 16:44:58 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
// Login attempts login to Management Server. Takes care of encrypting and decrypting messages.
|
2022-06-23 17:04:53 +02:00
|
|
|
func (c *GrpcClient) Login(serverKey wgtypes.Key, sysInfo *system.Info, pubSSHKey []byte) (*proto.LoginResponse, error) {
|
|
|
|
keys := &proto.PeerKeys{
|
|
|
|
SshPubKey: pubSSHKey,
|
|
|
|
WgPubKey: []byte(c.key.PublicKey().String()),
|
|
|
|
}
|
|
|
|
return c.login(serverKey, &proto.LoginRequest{Meta: infoToMetaData(sysInfo), PeerKeys: keys})
|
2022-01-18 16:44:58 +01:00
|
|
|
}
|
2022-05-08 11:04:57 +02:00
|
|
|
|
|
|
|
// GetDeviceAuthorizationFlow returns a device authorization flow information.
|
|
|
|
// It also takes care of encrypting and decrypting messages.
|
|
|
|
func (c *GrpcClient) GetDeviceAuthorizationFlow(serverKey wgtypes.Key) (*proto.DeviceAuthorizationFlow, error) {
|
|
|
|
if !c.ready() {
|
|
|
|
return nil, fmt.Errorf("no connection to management in order to get device authorization flow")
|
|
|
|
}
|
|
|
|
mgmCtx, cancel := context.WithTimeout(c.ctx, time.Second*2)
|
|
|
|
defer cancel()
|
|
|
|
|
|
|
|
message := &proto.DeviceAuthorizationFlowRequest{}
|
|
|
|
encryptedMSG, err := encryption.EncryptMessage(serverKey, c.key, message)
|
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
|
|
|
|
resp, err := c.realClient.GetDeviceAuthorizationFlow(mgmCtx, &proto.EncryptedMessage{
|
|
|
|
WgPubKey: c.key.PublicKey().String(),
|
|
|
|
Body: encryptedMSG},
|
|
|
|
)
|
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
|
|
|
|
flowInfoResp := &proto.DeviceAuthorizationFlow{}
|
|
|
|
err = encryption.DecryptMessage(serverKey, c.key, resp.Body, flowInfoResp)
|
|
|
|
if err != nil {
|
|
|
|
errWithMSG := fmt.Errorf("failed to decrypt device authorization flow message: %s", err)
|
|
|
|
log.Error(errWithMSG)
|
|
|
|
return nil, errWithMSG
|
|
|
|
}
|
|
|
|
|
|
|
|
return flowInfoResp, nil
|
|
|
|
}
|
2022-05-23 13:03:57 +02:00
|
|
|
|
2023-07-27 11:31:07 +02:00
|
|
|
// GetPKCEAuthorizationFlow returns a pkce authorization flow information.
|
|
|
|
// It also takes care of encrypting and decrypting messages.
|
|
|
|
func (c *GrpcClient) GetPKCEAuthorizationFlow(serverKey wgtypes.Key) (*proto.PKCEAuthorizationFlow, error) {
|
|
|
|
if !c.ready() {
|
|
|
|
return nil, fmt.Errorf("no connection to management in order to get pkce authorization flow")
|
|
|
|
}
|
|
|
|
mgmCtx, cancel := context.WithTimeout(c.ctx, time.Second*2)
|
|
|
|
defer cancel()
|
|
|
|
|
|
|
|
message := &proto.PKCEAuthorizationFlowRequest{}
|
|
|
|
encryptedMSG, err := encryption.EncryptMessage(serverKey, c.key, message)
|
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
|
|
|
|
resp, err := c.realClient.GetPKCEAuthorizationFlow(mgmCtx, &proto.EncryptedMessage{
|
|
|
|
WgPubKey: c.key.PublicKey().String(),
|
|
|
|
Body: encryptedMSG,
|
|
|
|
})
|
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
|
|
|
|
flowInfoResp := &proto.PKCEAuthorizationFlow{}
|
|
|
|
err = encryption.DecryptMessage(serverKey, c.key, resp.Body, flowInfoResp)
|
|
|
|
if err != nil {
|
|
|
|
errWithMSG := fmt.Errorf("failed to decrypt pkce authorization flow message: %s", err)
|
|
|
|
log.Error(errWithMSG)
|
|
|
|
return nil, errWithMSG
|
|
|
|
}
|
|
|
|
|
|
|
|
return flowInfoResp, nil
|
|
|
|
}
|
|
|
|
|
2024-01-22 12:20:24 +01:00
|
|
|
func (c *GrpcClient) notifyDisconnected(err error) {
|
2023-03-16 17:22:36 +01:00
|
|
|
c.connStateCallbackLock.RLock()
|
|
|
|
defer c.connStateCallbackLock.RUnlock()
|
|
|
|
|
|
|
|
if c.connStateCallback == nil {
|
|
|
|
return
|
|
|
|
}
|
2024-01-22 12:20:24 +01:00
|
|
|
c.connStateCallback.MarkManagementDisconnected(err)
|
2023-03-16 17:22:36 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
func (c *GrpcClient) notifyConnected() {
|
|
|
|
c.connStateCallbackLock.RLock()
|
|
|
|
defer c.connStateCallbackLock.RUnlock()
|
|
|
|
|
|
|
|
if c.connStateCallback == nil {
|
|
|
|
return
|
|
|
|
}
|
|
|
|
c.connStateCallback.MarkManagementConnected()
|
|
|
|
}
|
|
|
|
|
2022-05-23 13:03:57 +02:00
|
|
|
func infoToMetaData(info *system.Info) *proto.PeerSystemMeta {
|
|
|
|
if info == nil {
|
|
|
|
return nil
|
|
|
|
}
|
2024-02-20 11:53:11 +01:00
|
|
|
|
|
|
|
addresses := make([]*proto.NetworkAddress, 0, len(info.NetworkAddresses))
|
|
|
|
for _, addr := range info.NetworkAddresses {
|
|
|
|
addresses = append(addresses, &proto.NetworkAddress{
|
|
|
|
NetIP: addr.NetIP.String(),
|
|
|
|
Mac: addr.Mac,
|
|
|
|
})
|
|
|
|
}
|
|
|
|
|
2022-05-23 13:03:57 +02:00
|
|
|
return &proto.PeerSystemMeta{
|
|
|
|
Hostname: info.Hostname,
|
|
|
|
GoOS: info.GoOS,
|
|
|
|
OS: info.OS,
|
|
|
|
Core: info.OSVersion,
|
2024-02-20 09:59:56 +01:00
|
|
|
OSVersion: info.OSVersion,
|
2022-05-23 13:03:57 +02:00
|
|
|
Platform: info.Platform,
|
|
|
|
Kernel: info.Kernel,
|
|
|
|
WiretrusteeVersion: info.WiretrusteeVersion,
|
2022-05-25 23:25:02 +02:00
|
|
|
UiVersion: info.UIVersion,
|
2024-02-20 09:59:56 +01:00
|
|
|
KernelVersion: info.KernelVersion,
|
2024-02-20 11:53:11 +01:00
|
|
|
NetworkAddresses: addresses,
|
|
|
|
SysSerialNumber: info.SystemSerialNumber,
|
|
|
|
SysManufacturer: info.SystemManufacturer,
|
|
|
|
SysProductName: info.SystemProductName,
|
2024-03-01 15:15:56 +01:00
|
|
|
Environment: &proto.Environment{
|
|
|
|
Cloud: info.Environment.Cloud,
|
|
|
|
Platform: info.Environment.Platform,
|
|
|
|
},
|
2022-05-23 13:03:57 +02:00
|
|
|
}
|
|
|
|
}
|