The present invention is related to the software architecture and supporting application programming interface (API) that enable operating system (OS) independence and platform independence of a mobility enabled system architecture (MESA) in a wireless local area network (WLAN). The present invention provides a system for supporting portable and modular software implementation in different platforms in a WLAN node. The node includes a control plane configured to implement a control plane algorithm while interacting with a medium access control (MAC) driver, a data plane configured to implement a data plane algorithm while interacting with the MAC driver and, an operation, administration and maintenance (OAM) handler task configured to interact with the OAM agent. APIs are provided to enable interaction with external modules regardless of the differences of OS, specificity of OAM agent implementation and AP platform differences.