set_xml_property_copy(hello_node, XML_ATTR_OP,     CRM_OP_HELLO);
send_hello_message(IPC_Channel *ipc_client,		   const char *uuid,		   const char *client_name,		   const char *major_version,		   const char *minor_version){	xmlNodePtr hello_node = NULL;			if (uuid == NULL || strlen(uuid) == 0	    || client_name == NULL || strlen(client_name) == 0	    || major_version == NULL || strlen(major_version) == 0	    || minor_version == NULL || strlen(minor_version) == 0) {		crm_err("Missing fields, Hello message will not be valid.");		return;	}	hello_node = create_xml_node(NULL, XML_TAG_OPTIONS);	set_xml_property_copy(hello_node, "major_version", major_version);	set_xml_property_copy(hello_node, "minor_version", minor_version);	set_xml_property_copy(hello_node, "client_name",   client_name);	set_xml_property_copy(hello_node, "client_uuid",   uuid);	set_xml_property_copy(hello_node, XML_ATTR_OP,     CRM_OP_HELLO);	send_ipc_request(ipc_client,			 hello_node, NULL, 			 NULL, NULL,			 client_name, uuid,			 NULL);	free_xml(hello_node);}