<p>Adds support for handling a DHCPNAK when performing DHCP. It is possible that once iPXE has picked the IP address and sends the request that the DHCP server response with a DHCPNAK instead of a DHCPACK. According to RFC the DHCP client should start back at discover.</p>
<p>This was identified here: <a href="https://bugs.launchpad.net/bugs/1707999">https://bugs.launchpad.net/bugs/1707999</a></p>
<p>The patch has been tested in Ubuntu 16.04 and verified to work.</p>

<hr>

<h4>You can view, comment on, or merge this pull request online at:</h4>
<p>  <a href='https://github.com/ipxe/ipxe/pull/66'>https://github.com/ipxe/ipxe/pull/66</a></p>

<h4>Commit Summary</h4>
<ul>
  <li>Handle DHCPNAK by going back to discover state.</li>
</ul>

<h4>File Changes</h4>
<ul>
  <li>
    <strong>M</strong>
    <a href="https://github.com/ipxe/ipxe/pull/66/files#diff-0">src/net/udp/dhcp.c</a>
    (13)
  </li>
</ul>

<h4>Patch Links:</h4>
<ul>
  <li><a href='https://github.com/ipxe/ipxe/pull/66.patch'>https://github.com/ipxe/ipxe/pull/66.patch</a></li>
  <li><a href='https://github.com/ipxe/ipxe/pull/66.diff'>https://github.com/ipxe/ipxe/pull/66.diff</a></li>
</ul>

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