Re: [lwip-users] Defining the default route

[Mason]

Simon Goldschmidt wrote:

> Mason wrote:
> 
>> 1) The correct function to use is netif_set_default, right?
>>
>> 2) If I use static addressing, I have to declare the
>> default route myself, using netif_set_default?
>>
>> 3) When using DHCP, does the DHCP code take care of
>> declaring the default route, or do I have to do it
>> myself, like point 2?
> 
> 1) is always right. DHCP or AutoIP cannot change routing:
> you can have multiple netifs with DHCP or AutoIP enabled.

I thought lwip didn't support multi-homing very well?

Anyway, if I understand correctly, my init code should be:

static void do_lwip_init(void *arg)
{
  struct netif *netif = malloc(sizeof *netif);
  memset(netif, 0, sizeof *netif);
#if USE_DHCP
  netif_add(netif, NULL, NULL, NULL, NULL, ethernetif_init, tcpip_input);
  dhcp_start(netif);
#else
  ip_addr_t addr, mask;
  IP4_ADDR(&addr, 192, 168,   1, 42);
  IP4_ADDR(&mask, 255, 255, 255,  0);
  netif_add(netif, &addr, &mask, NULL, NULL, ethernetif_init, tcpip_input);
  netif_set_up(netif);
#endif
  netif_set_default(netif);
}

(And, as Ueli has pointed out, I must provide the address of a
gateway in the static addressing case.)

-- 
Regards.