lwIP APIs

The lwIP provides two APIs for use by applications:

RAW API: The raw API is customized for high performance and lower memory overhead. The limitation of raw API is that it is callback-based, and consequently does not provide portability to other TCP stacks.

Best Performance & Code Size

Complex For Application Development

Socket API: The socket API provides a BSD socket-style interface and is very portable; however, this mode is not as efficient as raw API mode in performance and memory requirements.

BSD Socket-style API → (Open-Read-Write-Close)

Very Portable