[Bug 1665264] Re: isc-dhcp-server 4.3.3-5ubuntu12.6 BOOTREPLY to wrong MAC address

[Sjors Gielen]

Can confirm this with DHCP instead of BOOTP as well:

Apr 19 17:51:48 curacao dhcpd[18031]: reuse_lease: lease age 671 (secs) under 25% threshold, reply with unaltered, existing lease
Apr 19 17:51:48 curacao dhcpd[18031]: DHCPDISCOVER from 08:00:27:44:28:00 via eth0
Apr 19 17:51:49 curacao dhcpd[18031]: DHCPOFFER on 192.168.0.60 to 08:00:27:04:2f:0f via eth0

Has this been reported upstream?

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https://bugs.launchpad.net/bugs/1665264

Title:
  isc-dhcp-server 4.3.3-5ubuntu12.6 BOOTREPLY to wrong MAC address

Status in isc-dhcp package in Ubuntu:
  Confirmed

Bug description:
  I am testing network boot on several embedded targets using BOOTP from
  the isc-dhcp-server package using Ubuntu 16.04.2.

  The /etc/dhcp/dhcpd.conf I modified looks like this:

  subnet 192.168.3.0 netmask 255.255.255.0
  {
    # The filenames must correspond to the barebox and MLO files which are placed in the /tftpboot directory
    range dynamic-bootp 192.168.3.11 192.168.3.100;
    if substring (option vendor-class-identifier, 0, 10) = "AM335x ROM"
    {
      filename "MLO";
    }
    elsif substring (option vendor-class-identifier, 0, 18) = "am335x barebox-mlo"
    {
      filename "barebox.bin";
    }
    range 192.168.3.101 192.168.3.199;
  }

  Booting the first target does work out of the box with no issues:

  Feb 16 09:11:38 lws-xxxx dhcpd[4259]: BOOTREPLY on 192.168.3.13 to 68:c9:0b:4a:3c:fe via enp5s2
  Feb 16 09:11:46 lws-xxxx dhcpd[4259]: reuse_lease: lease age 63582 (secs) under 25% th
  Feb 16 09:11:46 lws-xxxx dhcpd[4259]: BOOTREQUEST from 68:c9:0b:1c:74:8c via enp5s2

  And then the booting works..

  Trying to boot the second target (different board with different MAC)
  does not work any more:

  Feb 16 09:16:12 lws-xxxx dhcpd[4259]: BOOTREQUEST from 68:c9:0b:1c:74:8c via enp5s2
  Feb 16 09:16:12 lws-xxxx dhcpd[4259]: BOOTREPLY on 192.168.3.13 to 68:c9:0b:4a:3c:fe via enp5s2

  The dhcp receives the request but replies to the MAC of the first
  target. I see the same when trying the third, forth target and so on.
  The dhcp always replies to the MAC of the first target.

  This did work with the same configuration setup on Ubuntu 14.04.5 with
  4.2.4-7ubuntu12.8.

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