Re: [lwip-users] Using IPV6 (lwIP git head)

[Yvan Labadie]

Ok, I’ve founded !

It was my ethernet MAC configuration, I had “ETH_Receive_All” disabled… oops!

 

Yvan.

 

De : lwip-users-bounces+address@hidden [mailto:lwip-users-bounces+address@hidden De la part de Yvan Labadie
Envoyé : jeudi 28 juin 2012 12:11
À : address@hidden
Objet : [lwip-users] Using IPV6 (lwIP git head)

 

Hello,

 

I’m using lwIP in FreeRTOS on a STM32F1xx processor.

 

I was using lwIP v1.4.0, but now I want to use IPV6, so I migrated to git master head source code.

This latest version of lwIP is working good with IPV4, but not with IPV6.

 

I’ve added

#define LWIP_IPV6                 1

#define LWIP_IPV6_MLD             1

#define LWIP_IPV6_DHCP6           1

#define LWIP_ICMP6                1

#define LWIP_IPV6_AUTOCONFIG      1

in my lwipopts.h

 

I’m calling “netif_create_ip6_linklocal_address(&ethIface,1)” after “netif_set_up(&ethIface)”

 

Then I display all the IPV6 addresses (ethIface.ip6_addr[0 to max])

I can see that first one is the link local, and its status goes from TENTATIVE to PREFERED.

 

I ping this link-local address using ping6 on my computer but the device is not responding.

(NB ping6 is working OK, I’ve tested it with another computer connected to the same network interface).

 

I put a breakpoint in the ETHTYPE_IPV6 case, just after the low_level_input() inside ethernetif_input().

But I never get the break (break on ETHTYPE_IP or ETHTYPE_ARP is working)

 

With Wireshark I can see that the computer is sending the ICMPv6 requests, but the MAC destination is a type “IPv6mcast” whereas when I ping6 another computer in MAC destination field I got its MAC address…

 

Did I miss something in the lwIP migration?
Or is it a problem of setting up the interface?

 

Thanks a lot for your great work,

 

Best regards,

 

Yvan.