buglwIP - A Lightweight TCP/IP stack - Bugs: bug #58085, Openwrt Router discovery Device...

 
 

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bug #58085: Openwrt Router discovery Device failed

Submitter:  Lucas <lucaslwip1699>
Submitted:  Tue 31 Mar 2020 04:34:10 AM UTC
   
 
Category:  IPv6 Severity:  3 - Normal
Item Group:  Faulty Behaviour Status:  Invalid
Privacy:  Public Assigned to:  goldsimon
Open/Closed:  Closed Planned Release:  None
lwIP version:  Other

Fri 24 Apr 2020 05:37:43 AM UTC, comment #4: 

Ok, thanks for the update.

Simon Goldschmidt <goldsimon>
Group administrator
Fri 24 Apr 2020 05:36:04 AM UTC, comment #3: 

I confirm that this question is caused by my bsp layer configuration, and none of lwip stack business,and i will close it

Lucas <lucaslwip1699>
Thu 02 Apr 2020 06:31:20 PM UTC, comment #2: 

From reading your posts, I'm still not sure what the problem is.

Simon Goldschmidt <goldsimon>
Group administrator
Thu 02 Apr 2020 07:19:32 AM UTC, comment #1: 

I modify the BSP configuration to recv multicast packages ,cause my   device seems can not recv multicast packages , and my PC can ping my device throw the openwrt router directly, but I do some modify in lwip stack ,so I need some time to checkout the details about the whole process.
as a conclusion, MULTICAST is so important in IPv6.and I will post more details later.

Lucas <lucaslwip1699>
Tue 31 Mar 2020 04:34:10 AM UTC, original submission:  

I try to debug ipv6 feature in lwip 2.1.2 release version
the environment I use was Win10PC <-> Openwrt Router <-> Board with lwip stack

  fistly I config my router with IPv6 related configuration and then connect PC to LAN port ,Win10 PC get the right ipv6 address and its prefix was rule by router (ULA). and I find the IPv6 address was exist in the neighbor table in the Openwrt router.then I ping the PC in the router command line interface with the IPv6 address assign to the PC. everythine works fine.
  secondly I connnect my device to the Openwrt router,and then ping command seems no work from router to device. then I catch some data with tcpdump package and analysis it with wareshark. i find some different between PC and my dvice communicate with router , the PC will use ULA address which prefix was get from RA msg to communicate with router , but my device with lwip stack get ULA succ but it do not use it to communicate with rouer ,but only use link-local address instead .SO I was confuseed why lwip do not use autoconfig address to instead link-local address ?
   In my opnion in local network ULA shouled be preferred than link-local address ,and maybe it is my fault of lwip ipv6 feature use, SO sincerely to get some answer or advice of it .

Lucas <lucaslwip1699>

 

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  • -email is unavailable- added by goldsimon (Posted a comment)
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    Follow 3 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2020-04-24 goldsimon StatusNone Invalid
        Assigned toNone goldsimon
        Open/ClosedOpen Closed

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