Hi Marco, On Sun, 2 Sep 2018 14:08:09 +0200 Marco d'Itri <m...@linux.it> wrote:
> When providing to syslinux.efi an http URL in option 67: > > dhcp-option=option:bootfile-name,http://pxe.example.net/EFI/SYSLINUX/syslinux.efi > > then it will try to download the modules like ldlinux.e64, the > configuration file and the payload by sending an HTTP request to the > TFTP server address (with pxe.example.net as virtual host) instead of > resolving pxe.example.net and using that IP as expected. I checked the source code and found that efi network support was added here: http://repo.or.cz/syslinux.git/commit/fe283b78c973268f2d1f0309826ceeb5c9e8978d The commit mentions in the TODO part that DNS resolve code is still missing. This still seems to be the case, since the pxe_dns function in efi/pxe.c in the current HEAD (http://repo.or.cz/syslinux.git/blob/HEAD:/efi/pxe.c, lines 38-49) will `return 0` in all cases. The connection to your TFTP server address is the fallback behavior that's implemented for DNS resolve failures in core/fs/pxe/pxe.c (http://repo.or.cz/syslinux.git/blob/HEAD:/core/fs/pxe/pxe.c, lines 251-256). I will do a bit of testing and then forward your report to upstream. Regards Lukas
