Changeset 11129

Timestamp:

08/12/2008 09:23:42 PM (4 months ago)

Author:

dave

Message:

Make it obvious from the first mention that wildcards are not a solution
rather than waiting until after describing wildcards only to shoot them down.

Files:

• dotorg/trunk/html/beps/bep_0022.rst (modified) (6 diffs)

dotorg/trunk/html/beps/bep_0022.rst

@@ -19 +19 @@
 With this extension, BitTorrent clients are able to discover a tracker
 nearby on the network, and via this tracker discover nearby caches or
-peers.  A cache is simply a fast peer in the middle of the network. It
+peers.  A cache may simply be a fast peer in the middle of the network. It
 might also have substantial disk space. The client communicates with a
 cache using the normal BitTorrent protocol.
@@ -44 +44 @@
 BEP.
 
+Extensions to the BitTorrent wireline protocol to delegate seeding
+or improve cache performance are beyond the scope of this BEP. 
 
 The Discovery Mechanism
@@ -98 +100 @@
 The domain name returned from the reverse DNS lookup is specific to
 the querying host.  In the naive implementation in DNS, there would be
-one SRV resource record for every querying host.  The most obvious
-solution is to use a wildcard of the form::
+one SRV resource record for every querying host.  A natural but
+incorrect solution is to use a wildcard of the form::
 
   *.pacbell.net
 
-However, if wildcards are implemented according to the algorithm in
-section 4.3.2 in [#RFC-1034]_ then all subdomains of pacbell.net that
-do not have an exact label match will match the wildcard.  Thus,
+If wildcards are implemented according to the algorithm in section
+4.3.2 in [#RFC-1034]_ then all subdomains of pacbell.net that do not
+have an exact label match will match the wildcard.  Thus,
 
 ::
@@ -123 +125 @@
 implemented with BIND 9.4.1.
 
-The natural solution would be to specify domain names of the type
+Another natural but incorrect solution is to specify domain names of
+the type
 
 ::
@@ -157 +160 @@
 ::
 
-  _bittorrent-tracker.dsl.pltn13.pacbell.net
+  _bittorrent-tracker._tcp.dsl.pltn13.pacbell.net
 
 and then
@@ -163 +166 @@
 ::
 
-  _bittorrent-tracker.pltn13.pacbell.net
+  _bittorrent-tracker._tcp.pltn13.pacbell.net
 
 The search removes one label at a time terminating when one or more