104 lines
4.8 KiB
HTML
104 lines
4.8 KiB
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<HEAD>
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<TITLE>A Proposal for Passing Domain Information During an FST-0006 Session.</TITLE>
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<!-- Background white, links blue (unvisited), navy (visited), red (active) -->
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<BODY
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>
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<PRE>
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Document: FSC-0049
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Version: 001
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Date: 03-Jul-90
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A Proposal for
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Passing Domain Information
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During an FTS-0006 Session
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by
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Bob Hartman
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1:104/501@fidonet.org
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July 3, 1990
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Status of this document:
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This FSC suggests a proposed protocol for the FidoNet(r) community,
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and requests discussion and suggestions for improvements.
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Distribution of this document is unlimited.
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Fido and FidoNet are registered marks of Tom Jennings and Fido
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Software.
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FSC-0045 proposes a method for sending five dimensional FidoNet addresses
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(ie, zone:net/node.point@domain) via the type 2 packet header. This
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document describes a proposed method for sending the same five dimensional
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address in the Hello packet of an FTS-0006 session, with the additional
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advantage of being able to utilize the full Internet recognized domain name
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for various Fidonet technology networks. This proposal, combined with
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FSC-0045 will help to solve one of FidoNet's most pressing problems: How to
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recognize alternative networks without the need of some centralized
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management looking at all of them and what they are doing with Zone numbers,
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etc. Like FSC-0045, this proposal remains backwards compatible with what it
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is replacing.
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Currently FTS-0006 has provisions for zone, net, node, and point information
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to be passed in the Hello packet. To extend this to allow the domain name
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to be passed, an extra capability bit is used. This bit corresponds to the
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0x4000 bit, and will be called the DO_DOMAIN bit. If this bit is set, it
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means that the sender is domain aware, and has enclosed his domain in the
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Hello packet. The domain is stored in the system name field, after the null
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that terminates the real system name. The system name field is a maximum of
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60 characters, so the sender must make the real system name, a null, the
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domain name, and another null byte fit within the 60 bytes. The domain will
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start at the byte immediately after the first null byte. The domain is
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arbitrary length and should correspond to the Internet assigned domain name.
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This is NOT the same as the FSC-0045 domain, and therefore there needs to be
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a mapping between real Internet domains, and the FSC-0045 style domain name,
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if FSC-0045 is accepted by the FTSC as a standard for use by all mailers.
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This mapping is normally straightforward (for example, Internet fidonet.org
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would correspond to FSC-0045 domain FidoNet). Since most alternative nets
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do not have a registered Internet domain, the naming convention should be
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"known by" domain (ie, FSC-0045 domain name) followed by .ftn (for FidoNet
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Technology Network). So, the FSC-0045 domain "Alternet" would be converted
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to alternet.ftn under this proposal. This allows domains which are not
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normally FidoNet aware to use FTS-0006 to talk to FidoNet technology mail
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programs. For example, a mailer located at Camex in Manchester, NH might
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send it's mail as 'man.camex.com' during an FTS-0006 session. When parsing
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the domain name, the parsing should try to match the domain from right to
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left (Internet naming is hierarchical from right to left), so that if a
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mailer knew about man.camex.com, that could also match something of the form
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super.machine.silly.name.man.camex.com. The domain name should be case
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INSENSITIVE, and the FSC-0045 abbreviation of it should be unique within the
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first 8 characters, and also should not include any periods ('.') or at-signs
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('@') since those characters are significant in the Internet domain naming
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scheme.
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In order for this proposal to be adopted, the FTSC would have to assign the
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DO_DOMAIN bit, and have it documented in FTS-0006. This method is fully
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backwards compatible, since a domain aware mailer could send the domain
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information, and if the other end was not domain aware, it would ignore it.
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If the other end was domain aware, it would be able to extract the domain
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information easily and would then have a full five dimensional address
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available for the sender. This proposal remains fully backward compatible
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with the current uses of all FTS-0006 fields, and should not affect operation
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of any mailer that has used reserved bytes in the Hello packet.
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</PRE>
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