micropython/extmod/lwip-include/lwipopts.h

#ifndef __LWIPOPTS_H__
#define __LWIPOPTS_H__

#include <py/mpconfig.h>
#include <py/misc.h>
#include <py/mphal.h>

// We're running without an OS for this port. We don't provide any services except light protection.
#define NO_SYS 1

#define SYS_LIGHTWEIGHT_PROT 1
#include <stdint.h>
typedef uint32_t sys_prot_t;

#define TCP_LISTEN_BACKLOG 1

// We'll put these into a proper ifdef once somebody implements an ethernet driver
#define LWIP_ARP 0
#define LWIP_ETHERNET 0

#define LWIP_DNS 1

#define LWIP_NETCONN 0
#define LWIP_SOCKET 0

#ifdef MICROPY_PY_LWIP_SLIP
#define LWIP_HAVE_SLIPIF 1
#endif

// For now, we can simply define this as a macro for the timer code. But this function isn't
// universal and other ports will need to do something else. It may be necessary to move
// things like this into a port-provided header file.
#define sys_now mp_hal_ticks_ms

#endif