fix(core): Handle drives without SessionTimeout

If the drive is an Enterprise SSC drive odds are that it supports
setting SessionTimeout. However, I have ran into a drive that does not.
This means we now have to first try to set it, then if that fails fall
back to not setting it.

I believe this is the nicest solution right now.

Signed-off-by: Christian Svensson <christian.svensson@elastx.se>

pkg/core/method.go

@@ -85,6 +85,13 @@ func NewMethodCall(iid InvokingID, mid MethodID, flags MethodFlag) *MethodCall {
 	return m
 }
 
+// Copy the current state of a method call into a new independent copy
+func (m *MethodCall) Clone() *MethodCall {
+	mn := &MethodCall{bytes.Buffer{},m.depth, m.flags}
+	mn.buf.Write(m.buf.Bytes())
+	return mn
+}
+
 func (m *MethodCall) StartList() {
 	m.depth++
 	m.buf.Write(stream.Token(stream.StartList))

pkg/core/session.go

@@ -359,6 +359,7 @@ func (cs *ControlSession) NewSession(spid SPID, opts ...SessionOpt) (*Session, e
 	// Thus, we do not specify any authority here and let the users call ThisSP_Authenticate
 	// to elevate the session.
 
+	basemc := mc.Clone()
 	if s.ProtocolLevel == ProtocolLevelEnterprise {
 		// sedutil recommends setting a timeout for session on Enterprise protocol
 		// level. For normal Core devices I can't get it to work (INVALID_PARAMETER)
@@ -368,7 +369,12 @@ func (cs *ControlSession) NewSession(spid SPID, opts ...SessionOpt) (*Session, e
 		mc.EndOptionalParameter()
 	}
 
+	// Try with the method call with the optional parameters first,
+	// and if that fails fall back to the basic method call (basemc).
 	resp, err := cs.ExecuteMethod(mc)
+	if err == ErrMethodStatusInvalidParameter {
+		resp, err = cs.ExecuteMethod(basemc)
+	}
 	if err != nil {
 		return nil, err
 	}