[Xorg] Re: 64-bit applications and hostnames that start with a digi
Kaleb S. KEITHLEY
kaleb at gw.keithley.org
Thu Mar 25 06:42:26 PST 2004
Jim Gettys writes:
> An extract from RFC 2396 "Uniform Resource Identifiers (URI): Generic
> Syntax"'s ABNF is:
> The host is a domain name of a network host, or its IPv4 address as a
> set of four decimal digit groups separated by ".". Literal IPv6
> addresses are not supported.
> hostport = host [ ":" port ]
> host = hostname | IPv4address
> hostname = *( domainlabel "." ) toplabel [ "." ]
> domainlabel = alphanum | alphanum *( alphanum | "-" ) alphanum
> toplabel = alpha | alpha *( alphanum | "-" ) alphanum
> IPv4address = 1*digit "." 1*digit "." 1*digit "." 1*digit
> port = *digit
> My ABNF is getting a bit rusty, and I've never been great at
> grokking ABNF notation: folks, please check me here.
> Hosts can be either hostname's or IPv4 address strings.
> I think the toplabel requires that the first character be alpha, and
> not a number.
toplabels are, e.g.: "com", "org", "net", "biz", etc.
domainlabels, as you can see above, start with an alphanum, e.g. "18004memory" (that's the number '1' (one), not the letter 'l')
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