RFC 1545 (rfc1545) - Page 2 of 5
FTP Operation Over Big Address Records (FOOBAR)
Alternative Format: Original Text Document
RFC 1545 FTP Over Big Address November 1993
representation). The fields are separated by commas. A port command
is thus of the general form "PORT h1,h2,h3,h4,p1,p2", where h1 is the
high order 8 bits of the internet host address.
To accommodate larger network addresses anticipated for all IP "next
generation" alternatives, new commands and reply codes are needed for
FTP. This memo addresses these needs.
2. The LPRT Command
The LPRT command allows users to specify a "long" address for the
transport connection over which data are transferred. The LPRT
command syntax is:
LPRT
The argument is the concatenation of the following
fields;
o an 8-bit argument (af)
o an 8-bit argument (hal)
o a of (h1, h2, ...)
o an 8-bit (pal)
o a of (p1, p2, ...)
The argument takes the value of the version number
of IP (see Assigned Numbers, STD 2, RFC 1340), or generally speaking,
an Internet layer protocol. Relevant assigned IPng version numbers
are:
Decimal Keyword
------ -------
0 reserved
1-3 unassigned
4 Internet Protocol (IP)
5 ST Datagram Mode
6 SIP
7 TP/IX
8 PIP
9 TUBA
10-14 unassigned
15 reserved
Piscitello