[Bug 8046] New: ifup -a and udhcp sending before link up

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=8046

           Summary: ifup -a and udhcp sending before link up
           Product: Busybox
           Version: unspecified
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: Networking
        AssignedTo: unassigned at busybox.net
        ReportedBy: robert_cz at o2.pl
                CC: busybox-cvs at busybox.net
   Estimated Hours: 0.0


Hello,

We are using your soft in out platform based don STi processor. We have
detected that on some installation are problems to obtain dynamic IP from DHCP
server using ifup -a.
I have check TCP/IP packages using Wireshark and looks that ifup starting to
send udhcp packages before physical linkup - in console I see 3 udhcp discovery
packages, but in wireshark only one.

It is possible to add some link checking mechanism like in ifplugd.c over
SIOCETHTOOL?

Best regards

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