[lwip-devel] [bug #48887] tcp-listen, udp & raw pcbs need an 'err' callback

[Simon Goldschmidt]

URL:
  <http://savannah.nongnu.org/bugs/?48887>

                 Summary: tcp-listen, udp & raw pcbs need an 'err' callback
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: goldsimon
            Submitted on: Wed 24 Aug 2016 07:26:43 PM GMT
                Category: None
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None
            lwIP version: git head

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Details:

At least to notifiy an application of changed local address, these pcb types
need an 'err' callback.

The current implementation for tcp-listen and udp is to silently change the
address, but that doesn't work well for ipv6 and doesn't seem to match posix
behaviour (where a listen socket bound to a specific address just doesn't
receive further connections on address change) --> that should be changed, too
(or at least be optional? - thanks to the holy grail of backwards
compatibility)




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