[lwip-users] Help debugging IPv6 SLAAC

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[lwip-users] Help debugging IPv6 SLAAC

From:	thomasfogh
Subject:	[lwip-users] Help debugging IPv6 SLAAC
Date:	Thu, 19 Apr 2018 05:45:42 -0700 (MST)
I've changed my IPv4 only application to be IPv6 only.
Right now it doesn't do anything but try to get an IPv6 address.

In wireshark I get:
No.     Time               Source                   Destination          
Protocol Length Info
     66 12:16:57,336514    ::                       ff02::1:ff01:23cc    
ICMPv6   78     Neighbor Solicitation for fe80::250:e1ff:fe01:23cc
     67 12:16:57,404247    ::                       ff02::2              
ICMPv6   62     Router Solicitation
     69 12:16:59,475989    fe80::250:e1ff:fe01:23cc ff02::2              
ICMPv6   70     Router Solicitation from 00:50:e1:01:23:cc
     71 12:17:00,603247    fe80::250:e1ff:fe01:23cc ff02::2              
ICMPv6   70     Router Solicitation from 00:50:e1:01:23:cc
     72 12:17:01,685189    fe80::250:e1ff:fe01:23cc ff02::2              
ICMPv6   70     Router Solicitation from 00:50:e1:01:23:cc

Then nothing more happens and I can't ping the fe80::250:e1ff:fe01:23cc
address.
What am I missing?

I've changed the following to my lwipopts.h compared to my IPv4 app:
#define LWIP_IPV4                       0
#define LWIP_IPV6                       1
#define LWIP_NETIF_STATUS_CALLBACK      1
#define LWIP_ARP                        0
#define LWIP_ETHERNET                   1
#define LWIP_BROADCAST_PING             1
#define LWIP_MULTICAST_PING             1

Here's some of my code:

void lwip_init()
{
...
  tcpip_init(NULL, NULL);

  /* add the network interface */    
  netif_add(&netif, NULL, ethernetif_init, tcpip_input);
  
  netif.ip6_autoconfig_enabled = 1;
  netif_create_ip6_linklocal_address(&netif, 1);

  netif_set_status_callback(&netif, mbedtls_net_status_callback);

  /* register the default network interface. */
  netif_set_default(&netif);

  if (netif_is_link_up(&netif))
  {
    netif_set_up(&netif);
  }
  else
  {
    netif_set_down(&netif);
  }
...
}

err_t ethernetif_init(struct netif *netif)
{
  netif->name[0] = IFNAME0;
  netif->name[1] = IFNAME1;

  netif->output_ip6 = ethip6_output;
  netif->linkoutput = low_level_output;

    /* set netif MAC hardware address length */
  netif->hwaddr_len = ETH_HWADDR_LEN;

  /* set netif MAC hardware address */
  netif->hwaddr[0] =  MAC_ADDR0;
  netif->hwaddr[1] =  MAC_ADDR1;
  netif->hwaddr[2] =  MAC_ADDR2;
  netif->hwaddr[3] =  MAC_ADDR3;
  netif->hwaddr[4] =  MAC_ADDR4;
  netif->hwaddr[5] =  MAC_ADDR5;

  /* set netif maximum transfer unit */
  netif->mtu = 1500;

  /* Accept broadcast address and ARP traffic */
  netif->flags |= NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP |
NETIF_FLAG_IGMP;

  /* initialize the hardware */
  low_level_init(netif);

  return ERR_OK;
}

I've enabled some debug messages:
#define LWIP_DEBUG                      LWIP_DBG_ON
#define IP6_DEBUG                       LWIP_DBG_ON
#define ICMP_DEBUG                      LWIP_DBG_ON
#define NETIF_DEBUG                     LWIP_DBG_ON
#define INET_DEBUG                      LWIP_DBG_ON
#define IP_DEBUG                        LWIP_DBG_ON
#define TIMERS_DEBUG                    LWIP_DBG_ON
#define TCP_DEBUG                       LWIP_DBG_ON
#define TCP_INPUT_DEBUG                 LWIP_DBG_ON
#define TCP_OUTPUT_DEBUG                LWIP_DBG_ON
#define TCPIP_DEBUG                     LWIP_DBG_ON
#define AUTOIP_DEBUG                    LWIP_DBG_ON
#define DNS_DEBUG                       LWIP_DBG_ON
#define ETHARP_DEBUG                    LWIP_DBG_ON

My log:

 14:16:48.287 [RX] - Starting Main Thread...<CR><LF>
dns_init: initializing<LF>
 14:16:50.050 [RX] - netif: added interface st IP<LF>
netif_ip6_addr_set_state: netif address state being changed<LF>
netif: IPv6 address 0 of interface st set to
FE80::250:E1FF:FE01:23CC/0x08<LF>
netif: setting default interface st<LF>
NETIF: st0 is UP<LF>
IPV6: Host at FE80::250:E1FF:FE01:23CC<LF>
inet_chksum_pseudo(): checksumming pbuf 0x20008a14 (has next 0x0) <LF>
inet_chksum_pseudo(): pbuf chain lwip_chksum()=c3ad<LF>
ip6_output_if: st0<LF>
IPv6 header:<LF>
+-------------------------------+<LF>
|  6 |    0  |            0     | (ver, class, flow)<LF>
+-------------------------------+<LF>
|        24     |   58  |  255  | (plen, nexth, hopl)<LF>
+-------------------------------+<LF>
|     0 |     0 |     0 |     0 | (src)<LF>
|     0 |     0 |     0 |     0 |<LF>
+-------------------------------+<LF>
|  ff02 |     0 |     0 |     0 | (dest)<LF>
|     0 |     1 |  ff01 |  23cc |<LF>
+-------------------------------+<LF>
netif->output_ip6()<LF>
ethernet_output: sending packet 0x20008a14<LF>
IP address = FE80::250:E1FF:FE01:23CC<LF>
 14:16:57.411 [RX] - netif_ip6_addr_set_state: netif address state being
changed<LF>
netif: IPv6 address 0 of interface st set to
FE80::250:E1FF:FE01:23CC/0x09<LF>
inet_chksum_pseudo(): checksumming pbuf 0x20008a14 (has next 0x0) <LF>
inet_chksum_pseudo(): pbuf chain lwip_chksum()=4784<LF>
ip6_output_if: st0<LF>
IPv6 header:<LF>
+-------------------------------+<LF>
|  6 |    0  |            0     | (ver, class, flow)<LF>
+-------------------------------+<LF>
|         8     |   58  |  255  | (plen, nexth, hopl)<LF>
+-------------------------------+<LF>
|     0 |     0 |     0 |     0 | (src)<LF>
|     0 |     0 |     0 |     0 |<LF>
+-------------------------------+<LF>
|  ff02 |     0 |     0 |     0 | (dest)<LF>
|     0 |     0 |     0 |     2 |<LF>
+-------------------------------+<LF>
netif->output_ip6()<LF>
ethernet_output: sending packet 0x20008a14<LF>
 14:16:59.483 [RX] - netif_ip6_addr_set_state: netif address state being
changed<LF>
NETIF: st0 is UP<LF>
IPV6: Host at FE80::250:E1FF:FE01:23CC<LF>
netif: IPv6 address 0 of interface st set to
FE80::250:E1FF:FE01:23CC/0x30<LF>
inet_chksum_pseudo(): checksumming pbuf 0x20008a14 (has next 0x0) <LF>
inet_chksum_pseudo(): pbuf chain lwip_chksum()=d8f<LF>
ip6_output_if: st0<LF>
IPv6 header:<LF>
+-------------------------------+<LF>
|  6 |    0  |            0     | (ver, class, flow)<LF>
+-------------------------------+<LF>
|        16     |   58  |  255  | (plen, nexth, hopl)<LF>
+-------------------------------+<LF>
|  fe80 |     0 |     0 |     0 | (src)<LF>
|   250 |  e1ff |  fe01 |  23cc |<LF>
+-------------------------------+<LF>
|  ff02 |     0 |     0 |     0 | (dest)<LF>
|     0 |     0 |     0 |     2 |<LF>
+-------------------------------+<LF>
netif->output_ip6()<LF>
ethernet_output: sending packet 0x20008a14<LF>
 14:17:00.610 [RX] - inet_chksum_pseudo(): checksumming pbuf 0x20008a14 (has
next 0x0) <LF>
inet_chksum_pseudo(): pbuf chain lwip_chksum()=d8f<LF>
ip6_output_if: st0<LF>
IPv6 header:<LF>
+-------------------------------+<LF>
|  6 |    0  |            0     | (ver, class, flow)<LF>
+-------------------------------+<LF>
|        16     |   58  |  255  | (plen, nexth, hopl)<LF>
+-------------------------------+<LF>
|  fe80 |     0 |     0 |     0 | (src)<LF>
|   250 |  e1ff |  fe01 |  23cc |<LF>
+-------------------------------+<LF>
|  ff02 |     0 |     0 |     0 | (dest)<LF>
|     0 |     0 |     0 |     2 |<LF>
+-------------------------------+<LF>
netif->output_ip6()<LF>
ethernet_output: sending packet 0x20008a14<LF>
 14:17:01.693 [RX] - inet_chksum_pseudo(): checksumming pbuf 0x20008a14 (has
next 0x0) <LF>
inet_chksum_pseudo(): pbuf chain lwip_chksum()=d8f<LF>
ip6_output_if: st0<LF>
IPv6 header:<LF>
+-------------------------------+<LF>
|  6 |    0  |            0     | (ver, class, flow)<LF>
+-------------------------------+<LF>
|        16     |   58  |  255  | (plen, nexth, hopl)<LF>
+-------------------------------+<LF>
|  fe80 |     0 |     0 |     0 | (src)<LF>
|   250 |  e1ff |  fe01 |  23cc |<LF>
+-------------------------------+<LF>
|  ff02 |     0 |     0 |     0 | (dest)<LF>
|     0 |     0 |     0 |     2 |<LF>
+-------------------------------+<LF>
netif->output_ip6()<LF>
ethernet_output: sending packet 0x20008a14<LF>
 14:17:27.416 [RX] - tcpip_thread: PACKET 0x200098b0<LF>
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:e0:4c:68:00:c1, type:800<LF>
 14:17:58.166 [RX] - tcpip_thread: PACKET 0x200098b0<LF>
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:e0:4c:68:00:c1, type:800<LF>
 14:17:58.916 [RX] - tcpip_thread: PACKET 0x200098b0<LF>
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:e0:4c:68:00:c1, type:800<LF>
 14:17:59.666 [RX] - tcpip_thread: PACKET 0x200098b0<LF>
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:e0:4c:68:00:c1, type:800<LF>
 14:18:30.287 [RX] - tcpip_thread: PACKET 0x200098b0<LF>
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:e0:4c:68:00:c1, type:800<LF>
 14:18:41.227 [RX] - tcpip_thread: PACKET 0x200098b0<LF>
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:e0:4c:68:00:c1, type:800<LF>
 14:18:50.417 [RX] - tcpip_thread: PACKET 0x200098b0<LF>
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:e0:4c:68:00:c1, type:800<LF>
 14:18:51.186 [RX] - tcpip_thread: PACKET 0x200098b0<LF>
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:e0:4c:68:00:c1, type:800<LF>
 14:18:51.936 [RX] - tcpip_thread: PACKET 0x200098b0<LF>
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:e0:4c:68:00:c1, type:800<LF>
 14:18:52.672 [RX] - tcpip_thread: PACKET 0x200098b0<LF>
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:e0:4c:68:00:c1, type:800<LF>
 14:18:53.442 [RX] - tcpip_thread: PACKET 0x200098b0<LF>
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:e0:4c:68:00:c1, type:800<LF>
 14:18:54.192 [RX] - tcpip_thread: PACKET 0x200098b0<LF>
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:e0:4c:68:00:c1, type:800<LF>
 14:20:01.340 [RX] - tcpip_thread: PACKET 0x200098b0<LF>
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:e0:4c:68:00:c1, type:800<LF>
 14:20:02.106 [RX] - tcpip_thread: PACKET 0x200098b0<LF>
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:e0:4c:68:00:c1, type:800<LF>
 14:20:02.856 [RX] - tcpip_thread: PACKET 0x200098b0<LF>
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:e0:4c:68:00:c1, type:800<LF>
tcpip_thread: PACKET 0x200098b0<LF>
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:e0:4c:68:00:c1, type:800<LF>



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