RE: [lwip-users] DHCP - getting address works but not responding

[Pettinato, Jim]

First of all, apologies for not changing the subject line on my previous
message which is unrelated to this thread (but I was being lazy and just
replied to populate the 'To' address).


To take a stab at your problem... I assume you've already added your
interfaces to the stack's list prior to DHCP negotiation? And if you're
using DHCP, you are allowing the DHCP code to set the interface 'up' (so
you shouldn't be doing it explicitly?)

I'm assuming you are using lwIP 1.2.0...


-----Original Message-----
From: address@hidden
[mailto:address@hidden On Behalf
Of Spies, Dominik
Sent: Monday, May 14, 2007 11:02 AM
To: address@hidden
Subject: [lwip-users] DHCP - getting address works but not responding


Hi!

I use a LPC2368 with FreeRTOS. I set up lwIP this way:

stats_init();
sys_init();
mem_init();
memp_init();
pbuf_init();
etharp_init();
ip_init();
udp_init();
tcp_init(); 
IP4_ADDR(&my_ipaddr_data,  0, 0, 0, 0); IP4_ADDR(&my_netmask_data, 0, 0,
0, 0); IP4_ADDR(&my_gw_data, 0, 0, 0, 0); 
netif_eth0->flags &= NETIF_FLAG_DHCP;
netif_add(netif_eth0, &my_ipaddr_data, &my_netmask_data, &my_gw_data,
NULL, ethernetif_init, ip_input); netif_set_default(netif_eth0);
dhcp_start(netif_eth0);

After that the task goes in a loop which calls the 2 dhcp functions all
500ms and all 60s (and some other stuff to, webserver and so on..)

So with some debug output and packet-sniffing i found out the retrieving
works, and dhcp_bind works and after dhcp_bind netif->ip_addr is set
correctly, but the device does not more answer on pings, nor it answers
on arp-requests.

When I set the address manually this all works. Where's my mistake?

Kind Ragards,

Dominik


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