Dataplane routing (#2623)

* addition of dataplane routing

internal/daemon/controller/controller.go

@@ -38,6 +38,7 @@ import (
 	host_plugin_assets "github.com/hashicorp/boundary/plugins/host"
 	"github.com/hashicorp/boundary/sdk/pbs/plugin"
 	external_host_plugins "github.com/hashicorp/boundary/sdk/plugins/host"
+	"github.com/hashicorp/boundary/version"
 	"github.com/hashicorp/go-hclog"
 	"github.com/hashicorp/go-secure-stdlib/mlock"
 	"github.com/hashicorp/go-secure-stdlib/pluginutil/v2"
@@ -55,7 +56,7 @@ type downstreamRouter interface {
 	// ProcessPendingConnections starts a function that continually processes
 	// incoming client connections. This only returns when the provided context
 	// is done.
-	StartProcessingPendingConnections(context.Context, func() string)
+	StartProcessingPendingConnections(context.Context, func() string) error
 }
 
 // downstreamWorkersTicker defines an interface for a ticker that maintains the
@@ -77,8 +78,8 @@ type downstreamers interface {
 var (
 	downstreamRouterFactory func() downstreamRouter
 
-	downstreamersFactory           func(context.Context, string) (downstreamers, error)
-	downstreamWorkersTickerFactory func(context.Context, string, downstreamers, downstreamRouter) (downstreamWorkersTicker, error)
+	downstreamersFactory           func(context.Context, string, string) (downstreamers, error)
+	downstreamWorkersTickerFactory func(context.Context, string, string, downstreamers, downstreamRouter) (downstreamWorkersTicker, error)
 	commandClientFactory           func(context.Context, *Controller) error
 )
 
@@ -393,7 +394,8 @@ func New(ctx context.Context, conf *Config) (*Controller, error) {
 	}
 
 	if downstreamersFactory != nil {
-		c.downstreamWorkers, err = downstreamersFactory(ctx, "root")
+		boundVer := version.Get().VersionNumber()
+		c.downstreamWorkers, err = downstreamersFactory(ctx, "root", boundVer)
 		if err != nil {
 			return nil, fmt.Errorf("unable to initialize downstream workers graph: %w", err)
 		}
@@ -483,7 +485,8 @@ func (c *Controller) Start() error {
 	if downstreamWorkersTickerFactory != nil {
 		// we'll use "root" to designate that this is the root of the graph (aka
 		// a controller)
-		dswTicker, err := downstreamWorkersTickerFactory(c.baseContext, "root", c.downstreamWorkers, c.downstreamRoutes)
+		boundVer := version.Get().VersionNumber()
+		dswTicker, err := downstreamWorkersTickerFactory(c.baseContext, "root", boundVer, c.downstreamWorkers, c.downstreamRoutes)
 		if err != nil {
 			return fmt.Errorf("error creating downstream workers ticker: %w", err)
 		}