Add diameter:peer_info/1

To return information about a single peer_ref(), to avoid having to
retrieve more than is needed with service_info/2.

2 files changed, 40 insertions, 1 deletions

diff --git a/lib/diameter/src/base/diameter.erl b/lib/diameter/src/base/diameter.erl
index de88f6befd..b04697513e 100644
--- a/lib/diameter/src/base/diameter.erl
+++ b/lib/diameter/src/base/diameter.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2010-2015. All Rights Reserved.
+%% Copyright Ericsson AB 2010-2016. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -36,6 +36,7 @@
 
 %% Information.
 -export([services/0,
+         peer_info/1,
          service_info/2]).
 
 %% Start/stop the application. In a "real" application this should
@@ -53,6 +54,7 @@
               service_name/0,
               capability/0,
               peer_filter/0,
+              peer_ref/0,
               service_opt/0,
               application_opt/0,
               app_module/0,
@@ -147,6 +149,16 @@ service_info(SvcName, Option) ->
     diameter_service:info(SvcName, Option).
 
 %% ---------------------------------------------------------------------------
+%% peer_info/2
+%% ---------------------------------------------------------------------------
+
+-spec peer_info(peer_ref())
+   -> [tuple()].
+
+peer_info(PeerRef) ->
+    diameter_service:peer_info(PeerRef).
+
+%% ---------------------------------------------------------------------------
 %% add_transport/3
 %% ---------------------------------------------------------------------------
 
@@ -280,6 +292,9 @@ call(SvcName, App, Message) ->
     | {all, [peer_filter()]}
     | {any, [peer_filter()]}.
 
+-opaque peer_ref()
+   :: pid().
+
 -type evaluable()
    :: {module(), atom(), list()}
     | fun()
diff --git a/lib/diameter/src/base/diameter_service.erl b/lib/diameter/src/base/diameter_service.erl
index 87ef2e522d..de373b158f 100644
--- a/lib/diameter/src/base/diameter_service.erl
+++ b/lib/diameter/src/base/diameter_service.erl
@@ -32,6 +32,7 @@
 -export([subscribe/1,
          unsubscribe/1,
          services/0,
+         peer_info/1,
          info/2]).
 
 %% towards diameter_config
@@ -218,6 +219,29 @@ lookup_state(SvcName) ->
     end.
 
 %% ---------------------------------------------------------------------------
+%% # peer_info/2
+%% ---------------------------------------------------------------------------
+
+%% An extended version of info_peer/1 for peer_info/1.
+peer_info(Pid) ->
+    try
+        {_, PD} = process_info(Pid, dictionary),
+        {_, T} = lists:keyfind({diameter_peer_fsm, start}, 1, PD),
+        {TPid, {{Type, Ref}, TMod, Cfg}} = T,
+        {_, TD} = process_info(TPid, dictionary),
+        {_, Data} = lists:keyfind({TMod, info}, 1, TD),
+        [{ref, Ref},
+         {type, Type},
+         {owner, TPid},
+         {module, TMod},
+         {config, Cfg}
+         | try TMod:info(Data) catch _:_ -> [] end]
+    catch
+        error:_ ->
+            []
+    end.
+
+%% ---------------------------------------------------------------------------
 %% # subscribe/1
 %% # unsubscribe/1
 %% ---------------------------------------------------------------------------