Changeset 11091

Timestamp:

05/20/2008 06:24:48 PM (6 months ago)

Author:

dave

Message:

update reserved byte reserverations.

Files:

• dotorg/trunk/html/beps/bep_0004.rst (modified) (1 diff)

dotorg/trunk/html/beps/bep_0004.rst

@@ -23 +23 @@
  0x80  Azureus Messaging Protocol
 
+ reserved[2]
+ 0x08  BitTorrent Location-aware Protocol (no known implementations)
+
  reserved[5]
  0x10  LTEP (Libtorrent Extension Protocol)
+ 0x02  Extension Negotiation Protocol
+ 0x01  Extension Negotiation Protocol
 
  reserved[7]
  0x01  BitTorrent DHT
+ 0x02  XBT Peer Exchange 
  0x04  suggest, haveall, havenone, reject request, and allow fast extensions
+ 0x08  NAT Traversal
+
+There are known collisions.
+
+ reserved[0]
+ 0xFF  BitComet Extension Protocol
+
+ reserved[1]
+ 0xFF  BitComet Extension Protocol
+
+ reserved[7]
+ 0x01  XBT Metadata Exchange (implemented only in XBT)
+
+It is recommended that further extensions use LTEP [#BEP-]_.  With
+LTEP, extension bit collisions become impossible since no new
+extension bits are allocated.  With LTEP, message ID collisions also
+become impossible because message IDs are allocated on demand at the
+beginning of the connection.  Extension *name* collisions become
+possible, but the probability is much less likely.
 
 Reserved Message IDs