[lwip-devel] [bug #36389] Use IPv6 Src Address of Echo Response as Destination Address in Echo Response

[Enrico Lehmann]

URL:
  <http://savannah.nongnu.org/bugs/?36389>

                 Summary: Use IPv6 Src Address of Echo Response as Destination
Address in Echo Response
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: elehmann
            Submitted on: Do 03 Mai 2012 20:18:42 GMT
                Category: IPv6
                Severity: 3 - Normal
              Item Group: Change Request
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 
            lwIP version: CVS Head

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Details:

If an Echo Request is detected, the IPv6 source address of the Echo Response
message is determined by calling  ip6_select_source_address(). Shouldn't this
IPv6 source address not the same as the IPv6 destination address of the Echo
Request message? A quote from RFC 4443 [chapter 4.2]:

"The source address of an Echo Reply sent in response to a unicast Echo
Request message MUST be the same as the destination address of that Echo
Request message."

As I understand this would omit the ip6_select_source_address() and
simplifies it to just use the ip6_current_dest_addr() address (previous make
sure this is not a multicast address).


I'm using GIT master branch (NOT CVS Head - but this is the most accurate
version).




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