nt-lite/code/drivers/net/lwip/README.md

lwip.sys

lwip.sys is the TCP/IP stack provider driver. It owns lwIP, tcpip_thread, netif attach, DNS, TCP, UDP, and the provider-side socket implementation.

The core kernel owns only:

• NET_DEVICE registration and Ethernet frame transport
• NET_STACK_PROVIDER registration
• process-owned socket handles
• syscall/user-memory boundaries

Build notes:

• Do not use lwIP CMake.
• build.bat compiles the sources listed in drivers/net/lwip/lwip_sources.txt.
• Include directories:
  • code/drivers/net/lwip/include
  • code/drivers/net/lwip/third_party/lwip/src/include

Load order:

drivers.ini should load lwip.sys before NIC drivers so the provider is ready when the NIC registers. The kernel also supports provider-after-device registration, but provider-first keeps boot logs cleaner.