[dns] Add redundant explicit check for CNAME validity Passing the invalid length returned from a failed call to dns_copy() in to dns_question() will cause the latter to fail safely, but via a path that is not obviously safe at first glance. Check the return value from dns_copy() at the point of use, to reduce future review noise. Signed-off-by: Michael Brown <mcb30@ipxe.org>
iPXE is the leading open source network boot firmware. It provides a full PXE implementation enhanced with additional features such as:
boot from a web server via HTTP or HTTPS,
boot from an iSCSI, FCoE, or AoE SAN,
control the boot process with a script,
You can use iPXE to replace the existing PXE ROM on your network card, or you can chainload into iPXE to obtain the features of iPXE without the hassle of reflashing.
iPXE is free, open-source software licensed under the GNU GPL (with some portions under GPL-compatible licences).
You can download the rolling release binaries (built from the latest commit), or use the most recent stable release.
For full documentation, visit the iPXE website.
