TUN-7065: Remove classic tunnel creation

supervisor/supervisor.go

@@ -3,22 +3,18 @@ package supervisor
 import (
 	"context"
 	"errors"
-	"fmt"
 	"net"
 	"strings"
 	"time"
 
-	"github.com/google/uuid"
 	"github.com/lucas-clemente/quic-go"
 	"github.com/rs/zerolog"
 
 	"github.com/cloudflare/cloudflared/connection"
 	"github.com/cloudflare/cloudflared/edgediscovery"
-	"github.com/cloudflare/cloudflared/h2mux"
 	"github.com/cloudflare/cloudflared/orchestration"
 	"github.com/cloudflare/cloudflared/retry"
 	"github.com/cloudflare/cloudflared/signal"
-	tunnelpogs "github.com/cloudflare/cloudflared/tunnelrpc/pogs"
 	"github.com/cloudflare/cloudflared/tunnelstate"
 )
 
@@ -40,7 +36,6 @@ const (
 // Supervisor manages non-declarative tunnels. Establishes TCP connections with the edge, and
 // reconnects them if they disconnect.
 type Supervisor struct {
-	cloudflaredUUID         uuid.UUID
 	config                  *TunnelConfig
 	orchestrator            *orchestration.Orchestrator
 	edgeIPs                 *edgediscovery.Edge
@@ -57,7 +52,6 @@ type Supervisor struct {
 	logTransport *zerolog.Logger
 
 	reconnectCredentialManager *reconnectCredentialManager
-	useReconnectToken          bool
 
 	reconnectCh       chan ReconnectSignal
 	gracefulShutdownC <-chan struct{}
@@ -71,13 +65,9 @@ type tunnelError struct {
 }
 
 func NewSupervisor(config *TunnelConfig, orchestrator *orchestration.Orchestrator, reconnectCh chan ReconnectSignal, gracefulShutdownC <-chan struct{}) (*Supervisor, error) {
-	cloudflaredUUID, err := uuid.NewRandom()
-	if err != nil {
-		return nil, fmt.Errorf("failed to generate cloudflared instance ID: %w", err)
-	}
-
 	isStaticEdge := len(config.EdgeAddrs) > 0
 
+	var err error
 	var edgeIPs *edgediscovery.Edge
 	if isStaticEdge { // static edge addresses
 		edgeIPs, err = edgediscovery.StaticEdge(config.Log, config.EdgeAddrs)
@@ -97,7 +87,6 @@ func NewSupervisor(config *TunnelConfig, orchestrator *orchestration.Orchestrato
 
 	edgeTunnelServer := EdgeTunnelServer{
 		config:            config,
-		cloudflaredUUID:   cloudflaredUUID,
 		orchestrator:      orchestrator,
 		credentialManager: reconnectCredentialManager,
 		edgeAddrs:         edgeIPs,
@@ -108,13 +97,7 @@ func NewSupervisor(config *TunnelConfig, orchestrator *orchestration.Orchestrato
 		connAwareLogger:   log,
 	}
 
-	useReconnectToken := false
-	if config.ClassicTunnel != nil {
-		useReconnectToken = config.ClassicTunnel.UseReconnectToken
-	}
-
 	return &Supervisor{
-		cloudflaredUUID:            cloudflaredUUID,
 		config:                     config,
 		orchestrator:               orchestrator,
 		edgeIPs:                    edgeIPs,
@@ -125,7 +108,6 @@ func NewSupervisor(config *TunnelConfig, orchestrator *orchestration.Orchestrato
 		log:                        log,
 		logTransport:               config.LogTransport,
 		reconnectCredentialManager: reconnectCredentialManager,
-		useReconnectToken:          useReconnectToken,
 		reconnectCh:                reconnectCh,
 		gracefulShutdownC:          gracefulShutdownC,
 	}, nil
@@ -159,20 +141,6 @@ func (s *Supervisor) Run(
 	backoff := retry.BackoffHandler{MaxRetries: s.config.Retries, BaseTime: tunnelRetryDuration, RetryForever: true}
 	var backoffTimer <-chan time.Time
 
-	refreshAuthBackoff := &retry.BackoffHandler{MaxRetries: refreshAuthMaxBackoff, BaseTime: refreshAuthRetryDuration, RetryForever: true}
-	var refreshAuthBackoffTimer <-chan time.Time
-
-	if s.useReconnectToken {
-		if timer, err := s.reconnectCredentialManager.RefreshAuth(ctx, refreshAuthBackoff, s.authenticate); err == nil {
-			refreshAuthBackoffTimer = timer
-		} else {
-			s.log.Logger().Err(err).
-				Dur("refreshAuthRetryDuration", refreshAuthRetryDuration).
-				Msgf("supervisor: initial refreshAuth failed, retrying in %v", refreshAuthRetryDuration)
-			refreshAuthBackoffTimer = time.After(refreshAuthRetryDuration)
-		}
-	}
-
 	shuttingDown := false
 	for {
 		select {
@@ -219,16 +187,6 @@ func (s *Supervisor) Run(
 			}
 			tunnelsActive += len(tunnelsWaiting)
 			tunnelsWaiting = nil
-		// Time to call Authenticate
-		case <-refreshAuthBackoffTimer:
-			newTimer, err := s.reconnectCredentialManager.RefreshAuth(ctx, refreshAuthBackoff, s.authenticate)
-			if err != nil {
-				s.log.Logger().Err(err).Msg("supervisor: Authentication failed")
-				// Permanent failure. Leave the `select` without setting the
-				// channel to be non-null, so we'll never hit this case of the `select` again.
-				continue
-			}
-			refreshAuthBackoffTimer = newTimer
 		// Tunnel successfully connected
 		case <-s.nextConnectedSignal:
 			if !s.waitForNextTunnel(s.nextConnectedIndex) && len(tunnelsWaiting) == 0 {
@@ -377,44 +335,3 @@ func (s *Supervisor) waitForNextTunnel(index int) bool {
 func (s *Supervisor) unusedIPs() bool {
 	return s.edgeIPs.AvailableAddrs() > s.config.HAConnections
 }
-
-func (s *Supervisor) authenticate(ctx context.Context, numPreviousAttempts int) (tunnelpogs.AuthOutcome, error) {
-	arbitraryEdgeIP, err := s.edgeIPs.GetAddrForRPC()
-	if err != nil {
-		return nil, err
-	}
-
-	edgeConn, err := edgediscovery.DialEdge(ctx, dialTimeout, s.config.EdgeTLSConfigs[connection.H2mux], arbitraryEdgeIP.TCP)
-	if err != nil {
-		return nil, err
-	}
-	defer edgeConn.Close()
-
-	handler := h2mux.MuxedStreamFunc(func(*h2mux.MuxedStream) error {
-		// This callback is invoked by h2mux when the edge initiates a stream.
-		return nil // noop
-	})
-	muxerConfig := s.config.MuxerConfig.H2MuxerConfig(handler, s.logTransport)
-	muxer, err := h2mux.Handshake(edgeConn, edgeConn, *muxerConfig, h2mux.ActiveStreams)
-	if err != nil {
-		return nil, err
-	}
-	go muxer.Serve(ctx)
-	defer func() {
-		// If we don't wait for the muxer shutdown here, edgeConn.Close() runs before the muxer connections are done,
-		// and the user sees log noise: "error writing data", "connection closed unexpectedly"
-		<-muxer.Shutdown()
-	}()
-
-	stream, err := muxer.OpenRPCStream(ctx)
-	if err != nil {
-		return nil, err
-	}
-	rpcClient := connection.NewTunnelServerClient(ctx, stream, s.log.Logger())
-	defer rpcClient.Close()
-
-	const arbitraryConnectionID = uint8(0)
-	registrationOptions := s.config.registrationOptions(arbitraryConnectionID, edgeConn.LocalAddr().String(), s.cloudflaredUUID)
-	registrationOptions.NumPreviousAttempts = uint8(numPreviousAttempts)
-	return rpcClient.Authenticate(ctx, s.config.ClassicTunnel, registrationOptions)
-}