buglwIP - A Lightweight TCP/IP stack - Bugs: bug #43596, IGMP queries from 0.0.0.0 are...

 
 

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bug #43596: IGMP queries from 0.0.0.0 are discarded

Submitter:  Ben Hastings <hastings>
Submitted:  Thu 13 Nov 2014 06:48:36 AM UTC
   
 
Category:  IPv4 Severity:  3 - Normal
Item Group:  Change Request Status:  Fixed
Privacy:  Public Assigned to:  goldsimon
Open/Closed:  Closed Planned Release:  None
lwIP version:  1.4.1

Tue 09 Dec 2014 07:57:34 PM UTC, comment #1: 

Fixed, altough in a slightly different way

Simon Goldschmidt <goldsimon>
Group administrator
Thu 13 Nov 2014 06:48:36 AM UTC, original submission:  

Experiencing an issue with LwIP in a network with an IGMP snooping switch.  The switch is not an actual multicast router, so it sends general membership queries with a source address of 0.0.0.0.  This appears to be in line with RFC 4541, however LwIP discards the packets due to the bogus source address.  This causes the IGMP code to never respond with a membership report and the switch to stop forwarding multicast packets on that port.

The attached patch to ip.c allows packets with an all zero source address and the all systems (224.0.0.1) destination address to be passed to the IGMP code.

Ben Hastings <hastings>

 

(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

Attached Files
file #32426:  ip_igmp_src_addr.patch added by hastings (617B - application/octet-stream)

 

Depends on the following items: None found

Items that depend on this one: None found

 

Carbon-Copy List
  • -email is unavailable- added by goldsimon (Posted a comment)
  • -email is unavailable- added by hastings (Submitted the item)
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    Follow 4 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2014-12-09 goldsimon StatusNone Fixed
        Assigned toNone goldsimon
        Open/ClosedOpen Closed
    2014-11-13 hastings Attached File- Added ip_igmp_src_addr.patch, #32426

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