[support] Destination unreachable from HA on BU???
Mattias Blomqvist
mattias.blomqvist at gmail.com
Wed Mar 25 01:31:22 JST 2009
Hi
I've done some more research.
I can't get it to work with either of the mip6d from nautilus6.org or
from natisbad.org on either debian 4.0 or debian 5.0 with a variety of
kernels. I'm currently on debian 5.0 and kernel 2.6.29. The kernel is
before compiling checked with set_mip6_ipsec_fw_kernel_options.sh from
natisbad.org to make sure all the correct options are set.
Kernel 2.6.29 doesn't send destination unreachable as a patched 2.6.24 did.
I'm currently investigating the xfrm setup and I have a question. A HA
does both xfrm_ha_init() and xfrm_cn_init(). xfrm_ha_init() only sets
up ipsec which I have turned off. xfrm_cn_init() says in its comments:
/* Create policy for all BUs with home flag NOT set to
use home address option */
So where is the xfrm policy for BUs with home flag set ? Or isn't that
policy needed for the HA?
Just trying to understand things...
Would it be a good or bad idea to cross-post this to usagi-users?
BR,
Mattias Blomqvist
On Mon, Mar 23, 2009 at 11:44 PM, Romain KUNTZ <kuntz at lsiit.u-strasbg.fr> wrote:
> Hi Mattias,
>
> On 2009/03/23, at 15:02, Mattias Blomqvist wrote:
>> libc6 is standard debian 5.0 which is 2.7-18 (afaik).
>> I also came to think of libc problems so I recompiled from the source
>> package from nautilus6 but with exactly the same result.
>>
>> I've tracked the issue down to mh_recv() in mh_listen() in mh.c never
>> returning any data. This in turn is because recvmsg() in mh_recv()
>> never returns any data.
>> This seems to be in line with the destination unreachable being sent.
>> It seems like the kernel or some lib doesn't think that any process is
>> interested in the BU.
>
> I don't have any clue so far, but if you happen to find the cause of
> the problem and/or a solution, please advertise it on this list and
> I'll add an entry in the howto FAQ.
>
> Cheers,
> romain
>
>
>> On Mon, Mar 23, 2009 at 2:17 PM, Romain KUNTZ <kuntz at lsiit.u-strasbg.fr
>> > wrote:
>>> Seems also OK to me. That is odd, it's the first time I hear about
>>> such
>>> issue.
>>> I've got the sane configuration here (2.6.24-1 kernel & mip6d from
>>> nautilus6) running fine.
>>>
>>> Which libc6 version are you using? Mine is 2.7-18.
>>>
>>> Cheers,
>>> romain
>>>
>>> On 2009/03/23, at 13:18, Mattias Blomqvist wrote:
>>>
>>>> Hi,
>>>>
>>>> Good question. Missed that one. It says the following with mip6d and
>>>> radvd running:
>>>>
>>>> HA:~# netstat -6 -a
>>>> Active Internet connections (servers and established)
>>>> Proto Recv-Q Send-Q Local Address Foreign
>>>> Address State
>>>> tcp6 0 0 localhost:7777
>>>> [::]:* LISTEN
>>>> tcp6 0 0 [::]:ssh
>>>> [::]:* LISTEN
>>>> tcp6 0 0 localhost:6010
>>>> [::]:* LISTEN
>>>> raw6 0 0 [::]:ipv6-icmp
>>>> [::]:* 7
>>>> raw6 0 0 [::]:ipv6-icmp
>>>> [::]:* 7
>>>> raw6 0 0 [::]:135
>>>> [::]:* 7
>>>>
>>>> After stopping mip6d and radvd it says:
>>>> HA:~# netstat -6 -a
>>>> Active Internet connections (servers and established)
>>>> Proto Recv-Q Send-Q Local Address Foreign
>>>> Address State
>>>> tcp6 0 0 [::]:ssh
>>>> [::]:* LISTEN
>>>> tcp6 0 0 localhost:6010
>>>> [::]:* LISTEN
>>>>
>>>>
>>>> Looks ok to me. Or?
>>>>
>>>> BR,
>>>> Mattias
>>>>
>>>> On Mon, Mar 23, 2009 at 1:06 PM, Romain KUNTZ <kuntz at lsiit.u-strasbg.fr
>>>> >
>>>> wrote:
>>>>>
>>>>> Hi,
>>>>>
>>>>> What does netstat tells you?
>>>>>
>>>>> Cheers,
>>>>> romain
>>>>>
>>>>> On 2009/03/23, at 11:26, Mattias Blomqvist wrote:
>>>>>
>>>>>> Hello
>>>>>>
>>>>>> I'm getting destination unreachable icmp errors with code set to
>>>>>> "port
>>>>>> unreachable" (4) from the HA with mip6d running (and without of
>>>>>> course).
>>>>>> This is under Debian 5.0 but with the kernel and mip6d from
>>>>>> nautilus6.org.
>>>>>>
>>>>>> HA:~# uname -a
>>>>>> Linux HA 2.6.24-1-mip6-686 #1 SMP Tue Feb 26 03:20:31 UTC 2008
>>>>>> i686
>>>>>> GNU/Linux
>>>>>>
>>>>>> If I run mip6d in the foreground it says the following:
>>>>>> HA:~# mip6d
>>>>>> mip6d[2497]: MIPL Mobile IPv6 for Linux v2.0.2-umip-0.4 started
>>>>>> (Home
>>>>>> Agent)
>>>>>> Mon Mar 23 11:41:16 main: MIPL Mobile IPv6 for Linux started in
>>>>>> debug
>>>>>> mode, not detaching from terminal
>>>>>> Mon Mar 23 11:41:16 conf_show: config_file = /etc/mip6d.conf
>>>>>> Mon Mar 23 11:41:16 conf_show: vt_hostname = localhost
>>>>>> Mon Mar 23 11:41:16 conf_show: vt_service = 7777
>>>>>> Mon Mar 23 11:41:16 conf_show: mip6_entity = 2
>>>>>> Mon Mar 23 11:41:16 conf_show: debug_level = 10
>>>>>> Mon Mar 23 11:41:16 conf_show: debug_log_file = stderr
>>>>>> Mon Mar 23 11:41:16 conf_show: PolicyModulePath = [internal]
>>>>>> Mon Mar 23 11:41:16 conf_show: DefaultBindingAclPolicy = 0
>>>>>> Mon Mar 23 11:41:16 conf_show: NonVolatileBindingCache = disabled
>>>>>> Mon Mar 23 11:41:16 conf_show: KeyMngMobCapability = disabled
>>>>>> Mon Mar 23 11:41:16 conf_show: UseMnHaIPsec = disabled
>>>>>> Mon Mar 23 11:41:16 conf_show: MnMaxHaBindingLife = 262140
>>>>>> Mon Mar 23 11:41:16 conf_show: MnMaxCnBindingLife = 420
>>>>>> Mon Mar 23 11:41:16 conf_show: MnRouterProbes = 0
>>>>>> Mon Mar 23 11:41:16 conf_show: MnRouterProbeTimeout = 0.000000
>>>>>> Mon Mar 23 11:41:16 conf_show: InitialBindackTimeoutFirstReg =
>>>>>> 1.500000
>>>>>> Mon Mar 23 11:41:16 conf_show: InitialBindackTimeoutReReg =
>>>>>> 1.000000
>>>>>> Mon Mar 23 11:41:16 conf_show: UseCnBuAck = disabled
>>>>>> Mon Mar 23 11:41:16 conf_show: DoRouteOptimizationMN = enabled
>>>>>> Mon Mar 23 11:41:16 conf_show: MnUseAllInterfaces = disabled
>>>>>> Mon Mar 23 11:41:16 conf_show: MnDiscardHaParamProb = disabled
>>>>>> Mon Mar 23 11:41:16 conf_show: SendMobPfxSols = enabled
>>>>>> Mon Mar 23 11:41:16 conf_show: OptimisticHandoff = disabled
>>>>>> Mon Mar 23 11:41:16 conf_show: MobRtrUseExplicitMode = enabled
>>>>>> Mon Mar 23 11:41:16 conf_show: SendMobPfxAdvs = enabled
>>>>>> Mon Mar 23 11:41:16 conf_show: SendUnsolMobPfxAdvs = enabled
>>>>>> Mon Mar 23 11:41:16 conf_show: MaxMobPfxAdvInterval = 86400
>>>>>> Mon Mar 23 11:41:16 conf_show: MinMobPfxAdvInterval = 600
>>>>>> Mon Mar 23 11:41:16 conf_show: HaMaxBindingLife = 262140
>>>>>> Mon Mar 23 11:41:16 conf_show: HaAcceptMobRtr = disabled
>>>>>> Mon Mar 23 11:41:16 conf_show: DoRouteOptimizationCN = disabled
>>>>>> Mon Mar 23 11:41:16 xfrm_cn_init: Adding policies and states for
>>>>>> CN
>>>>>> Mon Mar 23 11:41:16 xfrm_ha_init: Adding policies and states for
>>>>>> HA
>>>>>> Mon Mar 23 11:41:16 ha_if_addr_setup: Joined anycast group
>>>>>> 2a03:a0a:ffff:ffff:ffff:ffff:ffff:fffe on iface 3
>>>>>>
>>>>>>
>>>>>> iface 3 is correct since:
>>>>>> HA:~# ip link
>>>>>> ........
>>>>>> 3: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
>>>>>> pfifo_fast
>>>>>> state UNKNOWN qlen 1000
>>>>>> link/ether 08:00:27:99:49:45 brd ff:ff:ff:ff:ff:ff
>>>>>>
>>>>>> tcpdump on HA gives:
>>>>>> HA:~# tcpdump -vvv -i eth0 -s 200 host yyyy:yyyy::1
>>>>>> tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture
>>>>>> size
>>>>>> 200
>>>>>> bytes
>>>>>>
>>>>>> 11:50:33.221717 IP6 (hlim 64, next-header IPv6 (41) payload
>>>>>> length:
>>>>>> 72) xxxx:xxxx::13 > yyyy:yyyy::1: IP6 (hlim 64, next-header
>>>>>> Mobility
>>>>>> (135) payload length: 32) yyyy:yyyy:0:1300::1 > yyyy:yyyy::1:
>>>>>> mobility: BU seq#=26817 AH lifetime=262140(padn)(alt-CoA:
>>>>>> xxxx:xxxx::13)
>>>>>>
>>>>>> 11:50:33.319495 IP6 (hlim 64, next-header ICMPv6 (58) payload
>>>>>> length:
>>>>>> 120) yyyy:yyyy::1 > xxxx:xxxx::13: [icmp6 sum ok] ICMP6,
>>>>>> destination
>>>>>> unreachable, length 120, unreachable port[|icmp6]
>>>>>>
>>>>>> radvd is running on HA with the following config:
>>>>>> interface eth0
>>>>>> {
>>>>>> AdvSendAdvert on;
>>>>>> MinRtrAdvInterval 3;
>>>>>> MaxRtrAdvInterval 10;
>>>>>> AdvIntervalOpt on;
>>>>>> AdvHomeAgentFlag on;
>>>>>> AdvHomeAgentInfo on;
>>>>>> HomeAgentLifetime 1800;
>>>>>> HomeAgentPreference 10;
>>>>>> AdvMobRtrSupportFlag off;
>>>>>> prefix xxxx:xxxx::1/32
>>>>>> {
>>>>>> AdvRouterAddr on;
>>>>>> AdvOnLink on;
>>>>>> AdvAutonomous off;
>>>>>> };
>>>>>> };
>>>>>>
>>>>>> I have tried with prefix xxxx:xxxx::1/64 and AdvAutonomous on
>>>>>> but the
>>>>>> result is still the same. And yes, radvd was restarted after
>>>>>> mip6d was
>>>>>> started.
>>>>>>
>>>>>> I assume that the BU's reach the HA but doesn't reach mip6d
>>>>>> running on
>>>>>> it since the icmp code says "unreachable port". Correct?
>>>>>> What can cause it?
>>>>>>
>>>>>> I've also tried with a recompiled debian 5.0 kernel and mip6d from
>>>>>> natisbad.org with the same result.
>>>>>>
>>>>>> BR,
>>>>>> Mattias
>>>>>> _______________________________________________
>>>>>> Support mailing list
>>>>>> Support at ml.nautilus6.org
>>>>>> http://ml.nautilus6.org/mailman/listinfo/support
>>>>>>
>>>>>
>>>>> _______________________________________________
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