This bug was fixed in the package klibc - 2.0.4-8ubuntu3
klibc (2.0.4-8ubuntu3) yakkety; urgency=medium
* debian/patches/broadcast_dhcp_send.patch: the patch sets the wrong bit in
the bootp flags field, instead of 0x800 it must be 0x8000. (LP: #1624014)
-- Dan Streetman <dan.street...@canonical.com> Fri, 16 Sep 2016
** Changed in: klibc (Ubuntu Yakkety)
Status: In Progress => Fix Released
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Wrong bit set in klibc PXE dhcp/bootp flags
Status in klibc package in Ubuntu:
Status in klibc source package in Trusty:
Status in klibc source package in Xenial:
Status in klibc source package in Yakkety:
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.
Get a DHCP relay agent that drops PXE packets with an invalid
bootp.flags bit set, and try to PXE boot; it fails.
None, the previous patch introduced this regression.
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