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[Bug 1624014] Re: Wrong bit set in klibc PXE dhcp/bootp flags

To: group.of.nepali.translators@xxxxxxxxxxxxxxxxxxx
From: Mathieu Trudel-Lapierre <mathieu.tl@xxxxxxxxx>
Date: Sat, 17 Sep 2016 00:15:12 -0000
Reply-to: Bug 1624014 <1624014@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Also affects: klibc (Ubuntu Yakkety)
   Importance: Undecided
       Status: New

** Also affects: klibc (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Also affects: klibc (Ubuntu Trusty)
   Importance: Undecided
       Status: New

** Changed in: klibc (Ubuntu Trusty)
       Status: New => In Progress

** Changed in: klibc (Ubuntu Yakkety)
       Status: New => In Progress

** Changed in: klibc (Ubuntu Xenial)
       Status: New => In Progress

** Changed in: klibc (Ubuntu Yakkety)
     Assignee: (unassigned) => Mathieu Trudel-Lapierre (cyphermox)

** Changed in: klibc (Ubuntu Trusty)
     Assignee: (unassigned) => Mathieu Trudel-Lapierre (cyphermox)

** Changed in: klibc (Ubuntu Xenial)
     Assignee: (unassigned) => Mathieu Trudel-Lapierre (cyphermox)

** Changed in: klibc (Ubuntu Trusty)
   Importance: Undecided => High

** Changed in: klibc (Ubuntu Xenial)
   Importance: Undecided => High

** Changed in: klibc (Ubuntu Yakkety)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1624014

Title:
  Wrong bit set in klibc PXE dhcp/bootp flags

Status in klibc package in Ubuntu:
  In Progress
Status in klibc source package in Trusty:
  In Progress
Status in klibc source package in Xenial:
  In Progress
Status in klibc source package in Yakkety:
  In Progress

Bug description:
  [Description]

  The patch for bug 1327412 set the wrong bit in the bootp flags field.
  It set flags to 0x800, but the correct value is 0x8000.  That sets the
  "broadcast" bit, and the spec requires all other bits to be 0.

  Setting one of the "must be zero" bits in the flags field causes some
  DHCP relay agents to drop the packets, causing PXE to fail.

  [Test Case]

  Get a DHCP relay agent that drops PXE packets with an invalid
  bootp.flags bit set, and try to PXE boot; it fails.

  [Regression]

  None, the previous patch introduced this regression.

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