* shuffled the docs around

[citadel.git] / citadel / techdoc / hack.txt

diff --git a/citadel/techdoc/hack.txt b/citadel/techdoc/hack.txt
index 321a2ea1579a7d04eca80595e15d3865095a25ea..a03585c6cb260b21a4f7ec2dfabc2b8ac36678a0 100644 (file)
--- a/citadel/techdoc/hack.txt
+++ b/citadel/techdoc/hack.txt
@@ -1,5 +1,5 @@
  hack.txt for Citadel/UX
- written by Art Cancro (ajc@uncnsrd.mt-kisco.ny.us)
+ (some of this stuff is *very* out of date.)
    
    Much of this document is borrowed from the original hack.doc from
 Citadel-CP/M and Citadel-86, because many of the concepts are the same.  Hats
@@ -83,6 +83,15 @@ B    Phone number    The dialup number of the system this message
                        defined for helping implement C86Net gateways.
 D      Destination     Contains name of the system this message should
                        be sent to, for mail routing (private mail only).
+E      Extended ID     A persistent alphanumeric Message ID used for
+                       network replication.  When a message arrives that
+                       contains an Extended ID, any existing messages which
+                       contain the same Extended ID and are *older* than this
+                       message should be deleted.  If there exist any messages
+                       with the same Extended ID that are *newer*, then this
+                       message should be dropped.
+F      rFc821 address  For Internet mail, this is the delivery address of the
+                       message author.
 G      Gateway domain  This field is provided solely for the implementation
                         of C86Net gateways, and holds the C86Net domain of
                         the system this message originated on.  Unless you're
@@ -105,8 +114,11 @@ S       Special field   Only meaningful for messages being spooled over a
                         network.  Usually means that the message isn't really
                         a message, but rather some other network function:
                         -> "S" followed by "FILE" (followed by a null, of
-                        course) means that the message text is actually an
-                        IGnet/Open file transfer.
+                           course) means that the message text is actually an
+                           IGnet/Open file transfer.
+                       -> "S" followed by "CANCEL" means that this message
+                          should be deleted from the local message base once
+                          it has been replicated to all network systems.
 T      Date/Time       A 32-bit integer containing the date and time of
                         the message in standard UNIX format (the number
                         of seconds since January 1, 1970 GMT).