Cart
[Home] [By Thread] [By Date] [Recent Entries]
I don't know of any documentation of the "Full Decimal" IP address. The Internet Protocol RFC 791 [1] (section 2.3) says: Addresses are fixed length of four octets (32 bits). The so-called "Full Decimal" representation is simply the decimal representation of these 32 bits as a single 32-bit number (rather than as four separate 8-bit numbers, as in the decimal and octal dotted quad notations). The URI Syntax RFC 2396 [2] refers only to dotted quad notation. The radix of each of the four segments is not discussed, but RFC 2732 (Format for Literal IPv6 Addresses in URL's) [3] amends RFC 2396's description of IPv4 addresses to limit the textual representation of each of the four segments to 3 digits. Although octal (actually, any radix from 7 through 10) could theoretically serve to represent all 8 bits of a segment in the 3 digits available, the programming convention of prepending a zero to octal literals would not be possible. Thus, given the allowable digit range ([0-9] -- radix can be no more than 10), the overwhelming probability that decimal notation is supported, and the impossibility of distinguishing decimal from any other radix (given the 3 digit limitation), it's quite certain that decimal is the one and only (de jure) standardized radix for IPv4 address segments in URLs. Because they are not specified in the URI/URL standard constellation, alternative IPv4 address notations (such as "Full Decimal" and octal dotted quad) are potentially not future-proof. "Full Decimal" notation in particular seems likely to go down in flames once IPv6 addressing becomes universal; what's the likelihood of browser support for 39-decimal-digit host addresses (IPv6 addresses are 128 bits)? Retroactive standardization aside (RFC 2732 is quite recent), I suspect that alternative textual forms for IPv4 addresses have been standardized de facto by browser makers hoping to gain the hyper-compatibility high ground, where compatibility is measured as a minimum of squeaky wheels asking for features (in the dark of the valley of the shadow of the half-life of Berners-Lee-nium). [1] Internet Protocol http://www.ietf.org/rfc/rfc791.txt [2] URI Syntax http://www.ietf.org/rfc/rfc2396.txt [3] IPv6 Addresses in URLs http://www.ietf.org/rfc/rfc2732.txt Dan Mabutt wrote: > Sorry about disrupting an XML list but since were're > already a little off track ... could you provide a link > that documents the Full Decimal IP address? > > Steve Rowe wrote: > > Dan Diebolt wrote: > > > These ip addresses are all equivalent: > > > > > > Octal fieldss : http://00317.00056.00202.00071 > > > Decimal fields : http://207.46.130.57 > > > Full Decimal : http://345931705 > > > > Full Decimal should be (post-septal-elision-restorification): > > > > http://3475931705
|
