On Mon, Jul 29, 2013 at 4:17 PM, Jeff Layton <jlayton@xxxxxxxxxx> wrote: >> >> Still, how can we have a FQDN that's 256 characters long when the host >> >> name length can be 1024 characters long? >> >> >> > >> > Excuse me, I am not quite familiar about cifs, so can not provide >> > additional more information (I found it only by reading code). >> > >> > But I feel, it really need additional discussion and check by the >> > related experts (related members who are familiar with cifs). >> > >> > Welcome any members' suggestions and completions. >> > >> > Thanks. >> >> Come on guys, enough already. As per here: >> https://en.wikipedia.org/wiki/Domain_Name_System >> >> and a comment above the max len of the fully qualified domain name (FQDN) is >> 63 octets per label and 255 bytes per FQDN. This maximum includes 254 >> bytes for the FQDN and one byte for the ending dot. >> > > Ok, I think I knew that at one point and paged it out. It does make one > wonder why NI_MAXHOST is so big though -- is that for some > internationalization scheme? > > -- > Jeff Layton <jlayton@xxxxxxxxxx> I guess it works if you're storing as UTF-32 or wchar_t at 4 bytes per character. 256 characters * 4 bytes/char + 1 byte for NULL. Microsoft seems to use the same value for NI_MAXHOST ref: http://msdn.microsoft.com/en-us/library/windows/desktop/ms738532(v=vs.85).aspx . -- Peace and Blessings, -Scott. -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
