Mainloop mode ("NO_SYS")

Collaboration diagram for Mainloop mode ("NO_SYS"):

Functions
void	lwip_init (void)
err_t	netif_input (struct pbuf *p, struct netif *inp)

Detailed Description

Use this mode if you do not run an OS on your system. #define NO_SYS to 1. Feed incoming packets to netif->input(pbuf, netif) function from mainloop, not from interrupt context. You can allocate a Packet buffers (PBUF) in interrupt context and put them into a queue which is processed from mainloop.
Call sys_check_timeouts() periodically in the mainloop.
Porting: implement all functions in Time, Critical sections and Compiler/platform abstraction.
You can only use "raw" APIs in this mode.
Sample code:

Function Documentation

lwip_init()

void lwip_init

(

void

)

Initialize all modules. Use this in NO_SYS mode. Use tcpip_init() otherwise.

Definition at line 339 of file init.c.

{
#ifndef LWIP_SKIP_CONST_CHECK
  int a = 0;
  LWIP_UNUSED_ARG(a);
  LWIP_ASSERT("LWIP_CONST_CAST not implemented correctly. Check your lwIP port.", LWIP_CONST_CAST(void *, &a) == &a);
#endif
#ifndef LWIP_SKIP_PACKING_CHECK
  LWIP_ASSERT("Struct packing not implemented correctly. Check your lwIP port.", sizeof(struct packed_struct_test) == PACKED_STRUCT_TEST_EXPECTED_SIZE);
#endif
 
  /* Modules initialization */
  stats_init();
#if !NO_SYS
  sys_init();
#endif /* !NO_SYS */
  mem_init();
  memp_init();
  pbuf_init();
  netif_init();
#if LWIP_IPV4
  ip_init();
#if LWIP_ARP
  etharp_init();
#endif /* LWIP_ARP */
#endif /* LWIP_IPV4 */
#if LWIP_RAW
  raw_init();
#endif /* LWIP_RAW */
#if LWIP_UDP
  udp_init();
#endif /* LWIP_UDP */
#if LWIP_TCP
  tcp_init();
#endif /* LWIP_TCP */
#if LWIP_IGMP
  igmp_init();
#endif /* LWIP_IGMP */
#if LWIP_DNS
  dns_init();
#endif /* LWIP_DNS */
#if PPP_SUPPORT
  ppp_init();
#endif
 
#if LWIP_TIMERS
  sys_timeouts_init();
#endif /* LWIP_TIMERS */
}

Referenced by lwip_fuzztest(), main(), and tcpip_init().

netif_input()

err_t netif_input	(	struct pbuf *	p,
		struct netif *	inp
	)

Forwards a received packet for input processing with ethernet_input() or ip_input() depending on netif flags. Don't call directly, pass to netif_add() and call netif->input(). Only works if the netif driver correctly sets NETIF_FLAG_ETHARP and/or NETIF_FLAG_ETHERNET flag!

Definition at line 228 of file netif.c.

{
  LWIP_ASSERT_CORE_LOCKED();
 
  LWIP_ASSERT("netif_input: invalid pbuf", p != NULL);
  LWIP_ASSERT("netif_input: invalid netif", inp != NULL);
 
#if LWIP_ETHERNET
  if (inp->flags & (NETIF_FLAG_ETHARP | NETIF_FLAG_ETHERNET)) {
    return ethernet_input(p, inp);
  } else
#endif /* LWIP_ETHERNET */
    return ip_input(p, inp);
}

Referenced by main().