bsr: add endpoint to session meta

The endpoint stores the address of the host
the egress worker proxies to.

internal/bsr/bsr.go

@@ -54,8 +54,6 @@ func NewSession(ctx context.Context, meta *SessionRecordingMeta, sessionMeta *Se
 		return nil, fmt.Errorf("%s: missing session meta: %w", op, ErrInvalidParameter)
 	case meta.Id == "":
 		return nil, fmt.Errorf("%s: missing session id: %w", op, ErrInvalidParameter)
-	case is.Nil(sessionMeta.StaticHost) && is.Nil(sessionMeta.DynamicHost):
-		return nil, fmt.Errorf("%s: missing session host information: %w", op, ErrInvalidParameter)
 	case !is.Nil(sessionMeta.StaticHost) && !is.Nil(sessionMeta.DynamicHost):
 		return nil, fmt.Errorf("%s: sessionMeta cannot contain both static and dynamic host information: %w", op, ErrInvalidParameter)
 	case len(sessionMeta.StaticCredentialStore) == 0 && len(sessionMeta.VaultCredentialStore) == 0:

internal/bsr/meta_session.go

@@ -162,6 +162,7 @@ type VaultSshCertLibrary struct {
 // SessionMeta contains metadata about a session in a BSR.
 type SessionMeta struct {
 	PublicId string
+	Endpoint string
 	User     *User
 	Target   *Target
 	Worker   *Worker

internal/bsr/testing.go

@@ -13,6 +13,7 @@ func TestSessionRecordingMeta(s string, p Protocol) *SessionRecordingMeta {
 func TestSessionMeta(s string) *SessionMeta {
 	return &SessionMeta{
 		PublicId: s,
+		Endpoint: "myhost:12345",
 		User: &User{
 			PublicId: "user123",
 			Scope: Scope{