Hello Laurent,
For some remote instruments, I need to be able to have a telnet access to the boot in case of my Linux kernel and file system are down (after an upgrade for example). I don't think that u-boot provide telnet support and I had a look at another boot project called redboot that provide such a functionality. I have a couple of questions : Does anybody see another solution than telnet to control a remote instrument? Has anybody already tried to add telnet server to u-boot? It seems to be a challenging task because we need to add TCP support.
U-Boot does not contain any TCP implementation. I doubt that this will be doable with reasonable effort. Writing a standard conform TCP implementation is a daunting task that even many proprietary systems could not solve, i.e. there are many TCP implementations working well in "the lab" _only_.
What I had in mind is a "UDP console" as it was implemented some time ago for the Linux kernel also (there was a patch floating around). Googling for it I found at least this link [1]. This would of course need a "special" program to access the console but it is a much more realistic target to aim at.
Has anybody used both u-boot and redboot and can point me the main advantages and drawbacks of both?
Sorry, I can't help you there.
Cheers Detlev
[1] http://www.linux.it/kerneldocs/sercons/sercons.html