Changeset 11138

Timestamp:

09/04/2008 04:03:39 PM (4 months ago)

Author:

dave

Message:

updated to include text requiring peer to drop connections when switching between swarms.

Files:

• dotorg/trunk/html/beps/bep_0027.rst (modified) (3 diffs)

dotorg/trunk/html/beps/bep_0027.rst

@@ -15 +15 @@
 IETF RFC 2119 [#RFC-2119]_.
 
-A *private tracker* restricts access to the torrents it tracks.  A 
-torrent with restricted access is called a *private torrent*.  To
-promote sharing, private trackers often maintain statistics about
-registered users and restrict access to certain or all torrents for
-users that do not adequately upload.
+A *private tracker* restricts access to the torrents it tracks.  A
+torrent with restricted access is called a *private torrent*.  All
+other torrents are *public torrents*.  To promote sharing, private
+trackers often maintain statistics about registered users and restrict
+access to certain or all torrents for users that do not adequately
+upload.
 
 When generating a metainfo file, users denote a torrent as private by
@@ -29 +30 @@
 private tracker, and MUST ONLY initiate connections to peers returned
 from the private tracker.
+
+When multiple trackers appear in the *announce-list* in the metainfo
+file of a private torrent (see multitracker extension in [#BEP-12]_),
+each peer MUST use only one tracker at a time and only switch between
+trackers when the current tracker fails.  When switching between
+trackers, the peer MUST disconnect from all current peers and
+reconnect only to those provided from the new tracker.
 
 Rationale
@@ -59 +67 @@
 with the intruder would provide the intruder with a full complement of
 peers.
+
+When a peer switches between trackers, the peer drops connections so
+that it cannot become an ongoing bridge between peers granted access
+from a private tracker and peers announcing to a public tracker.  This
+partially mitigates the effect of an attacker modifying a metainfo
+file's *announce-list* and redistributing the file, e.g., via a public
+tracker web site.