From c18b13d4c8aa31b145703bbbf228fb07d6b2a0a5 Mon Sep 17 00:00:00 2001
From: Erlang/OTP <otp@erlang.org>
Date: Wed, 21 Jun 2017 10:53:19 +0200
Subject: Prepare release

---
 lib/diameter/doc/src/notes.xml | 70 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)

(limited to 'lib/diameter/doc/src/notes.xml')

diff --git a/lib/diameter/doc/src/notes.xml b/lib/diameter/doc/src/notes.xml
index 50f568abaa..60478606ad 100644
--- a/lib/diameter/doc/src/notes.xml
+++ b/lib/diameter/doc/src/notes.xml
@@ -43,6 +43,76 @@ first.</p>
 
 <!-- ===================================================================== -->
 
+<section><title>diameter 2.0</title>
+
+    <section><title>Improvements and New Features</title>
+      <list>
+        <item>
+          <p>
+	    Let candidate peers be passed to diameter:call/4</p>
+          <p>
+	    With call option peer, to allow a request to be sent to a
+	    peer that hasn't advertised support for the application
+	    in question.</p>
+          <p>
+	    RFC 6733 2.4 requires a node to send the application
+	    identifiers of all locally supported applications at
+	    capabilities exchange, but not all nodes respect this for
+	    the common application, and diameter itself will send
+	    D[WP][RA] without the common application having been
+	    explicitly advertised. Regarding the common application
+	    as implicit renders Result-Code 5010
+	    (DIAMETER_NO_COMMON_APPLICATION) meaningless however, so
+	    allow any request to be sent as long as there is a
+	    configured dictionary to support it.</p>
+          <p>
+	    Own Id: OTP-14338</p>
+        </item>
+        <item>
+          <p>
+	    Improve performance of message encode/decode and related
+	    handling.</p>
+          <p>
+	    Dictionaries using @custom_types or @codecs will need to
+	    adapt the corresponding functions to accept an additional
+	    argument that is now passed through encode/decode, which
+	    was required to remove various process dictionary-based
+	    workarounds that have been used to solve problems in the
+	    past.</p>
+          <p>
+	    *** POTENTIAL INCOMPATIBILITY ***</p>
+          <p>
+	    Own Id: OTP-14343</p>
+        </item>
+        <item>
+          <p>
+	    Add transport options to avoid deadlock and allow for
+	    load regulation.</p>
+          <p>
+	    Both diameter_tcp and diameter_sctp now accept two new
+	    configuration options: sender and message_cb. The former
+	    causes outgoing sends to take place in a dedicated
+	    process, to avoid the possibility of deadlock when both
+	    the transport process and its peer block in send. The
+	    latter allows a callback to control the reading of
+	    messages on the socket, to allow for backpressure towards
+	    peers when the rate of incoming traffic is greater than
+	    can otherwise be handled.</p>
+          <p>
+	    Neither of these options are yet documented, but are
+	    unlikely to change unless problems are discovered. The
+	    sender option is not the default since it should probably
+	    always be used in combination with message_cb, to prevent
+	    incoming requests from being read at a higher rate than a
+	    peer allows outgoing answers to be sent.</p>
+          <p>
+	    Own Id: OTP-14455 Aux Id: ERL-332 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>diameter 1.12.2</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
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