[lwip-devel] [bug #55121] Provide application callback for dhcp reboot with unchanged address

[Niklas Gürtler]

URL:
  <https://savannah.nongnu.org/bugs/?55121>

                 Summary: Provide application callback for dhcp reboot with
unchanged address
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: erlkoenig
            Submitted on: Wed 28 Nov 2018 09:12:31 AM UTC
                Category: DHCP
                Severity: 3 - Normal
              Item Group: Feature Request
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None
            lwIP version: 2.1.1

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Details:

As mentioned on the mailing list
<http://lists.nongnu.org/archive/html/lwip-users/2018-11/msg00070.html>, lwIP
should inform the application about a successful DHCP reboot even if the
assigned address did not change. Currently, there does not appear to be a
consistent way to get a notification when the link becomes ready for TCP or
UDP, i.e. when a valid IP configuration was (re-)acquired. This would be
useful if the application needs to use TCP/UDP as sson as possible, including
after a reconnect. Therefore, some kind of callback for "IP ready" would be
useful.




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