[lwip-devel] [bug #37068] netif up/down handling is unclear

[Simon Goldschmidt]

URL:
  <http://savannah.nongnu.org/bugs/?37068>

                 Summary: netif up/down handling is unclear
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: goldsimon
            Submitted on: Fr 10 Aug 2012 06:51:25 GMT
                Category: None
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 
            lwIP version: CVS Head

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Details:

We currently send and receive on netifs that are 'administratively' set down
(netif_set_down()). This happens for DHCP and AutoIP (netif is only set to
'up' after successfully acquiring an IP address).

I think this is somewhat unclear and should be cleaned up in a way that a
netif must always be up when sending or receiving on it. The initialization
phase of DHCP/AutoIP should just set the netif IP address to '0.0.0.0' and
routing should ignore netifs with '0.0.0.0'.




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