Don't broadcast last published PEP items

When a client becomes available, don't send the last published PEP items
of all his peers to all his other peers, but only to that client.

src/ejabberd_c2s.erl

@@ -45,6 +45,7 @@
 	 set_aux_field/3,
 	 del_aux_field/2,
 	 get_subscription/2,
+	 send_filtered/5,
 	 broadcast/4,
 	 get_subscribed/1,
          transform_listen_option/2]).
@@ -247,6 +248,9 @@ get_subscription(LFrom, StateData) ->
        true -> none
     end.
 
+send_filtered(FsmRef, Feature, From, To, Packet) ->
+    FsmRef ! {send_filtered, Feature, From, To, Packet}.
+
 broadcast(FsmRef, Type, From, Packet) ->
     FsmRef ! {broadcast, Type, From, Packet}.
 
@@ -1738,6 +1742,26 @@ handle_info({force_update_presence, LUser}, StateName,
 		     _ -> StateData
 		   end,
     fsm_next_state(StateName, NewStateData);
+handle_info({send_filtered, Feature, From, To, Packet}, StateName, StateData) ->
+    Drop = ejabberd_hooks:run_fold(c2s_filter_packet, StateData#state.server,
+				   true, [StateData#state.server, StateData,
+					  Feature, To, Packet]),
+    NewStateData = if Drop ->
+			  ?DEBUG("Dropping packet from ~p to ~p",
+				 [jlib:jid_to_string(From),
+				  jlib:jid_to_string(To)]),
+			  StateData;
+		      true ->
+			  FinalPacket = jlib:replace_from_to(From, To, Packet),
+			  case StateData#state.jid of
+			    To ->
+				send_packet(StateData, FinalPacket);
+			    _ ->
+				ejabberd_router:route(From, To, FinalPacket),
+				StateData
+			  end
+		   end,
+    fsm_next_state(StateName, NewStateData);
 handle_info({broadcast, Type, From, Packet}, StateName, StateData) ->
     Recipients = ejabberd_hooks:run_fold(
 		   c2s_broadcast_recipients, StateData#state.server,

src/mod_caps.erl

@@ -48,7 +48,8 @@
 
 %% hook handlers
 -export([user_send_packet/3, user_receive_packet/4,
-	 c2s_presence_in/2, c2s_broadcast_recipients/6]).
+	 c2s_presence_in/2, c2s_filter_packet/6,
+	 c2s_broadcast_recipients/6]).
 
 -include("ejabberd.hrl").
 -include("logger.hrl").
@@ -266,6 +267,21 @@ c2s_presence_in(C2SState,
        true -> C2SState
     end.
 
+c2s_filter_packet(InAcc, Host, C2SState, {pep_message, Feature}, To, _Packet) ->
+    case ejabberd_c2s:get_aux_field(caps_resources, C2SState) of
+      {ok, Rs} ->
+	  LTo = jlib:jid_tolower(To),
+	  case gb_trees:lookup(LTo, Rs) of
+	    {value, Caps} ->
+		Drop = not lists:member(Feature, get_features(Host, Caps)),
+		{stop, Drop};
+	    none ->
+		{stop, true}
+	  end;
+      _ -> InAcc
+    end;
+c2s_filter_packet(Acc, _, _, _, _, _) -> Acc.
+
 c2s_broadcast_recipients(InAcc, Host, C2SState,
 			 {pep_message, Feature}, _From, _Packet) ->
     case ejabberd_c2s:get_aux_field(caps_resources,
@@ -317,6 +333,8 @@ init([Host, Opts]) ->
 		  [{max_size, MaxSize}, {life_time, LifeTime}]),
     ejabberd_hooks:add(c2s_presence_in, Host, ?MODULE,
 		       c2s_presence_in, 75),
+    ejabberd_hooks:add(c2s_filter_packet, Host, ?MODULE,
+		       c2s_filter_packet, 75),
     ejabberd_hooks:add(c2s_broadcast_recipients, Host,
 		       ?MODULE, c2s_broadcast_recipients, 75),
     ejabberd_hooks:add(user_send_packet, Host, ?MODULE,
@@ -348,6 +366,8 @@ terminate(_Reason, State) ->
     Host = State#state.host,
     ejabberd_hooks:delete(c2s_presence_in, Host, ?MODULE,
 			  c2s_presence_in, 75),
+    ejabberd_hooks:delete(c2s_filter_packet, Host, ?MODULE,
+			  c2s_filter_packet, 75),
     ejabberd_hooks:delete(c2s_broadcast_recipients, Host,
 			  ?MODULE, c2s_broadcast_recipients, 75),
     ejabberd_hooks:delete(user_send_packet, Host, ?MODULE,

src/mod_pubsub.erl

@@ -3367,12 +3367,13 @@ send_items(Host, Node, NodeId, Type, LJID, Number) ->
 ).
 
 dispatch_items(_From, _To, _Node, _Stanza = undefined) -> ok;
-dispatch_items(From, {U, S, R}, Node, Stanza) when is_tuple(From) ->
-    case ejabberd_sm:get_session_pid(U, S, R) of
+dispatch_items(From, {ToU, ToS, ToR} = To, Node, Stanza) ->
+    case ejabberd_sm:get_session_pid(ToU, ToS, ToR) of
       C2SPid when is_pid(C2SPid) ->
-	  ejabberd_c2s:broadcast(C2SPid,
-				 {pep_message, <<((Node))/binary, "+notify">>},
-				 service_jid(From), Stanza);
+	  ejabberd_c2s:send_filtered(C2SPid,
+				     {pep_message, <<Node/binary, "+notify">>},
+				     service_jid(From), jlib:make_jid(To),
+				     Stanza)
       _ -> ok
     end;
 dispatch_items(From, To, _Node, Stanza) ->

src/mod_pubsub_odbc.erl

@@ -3052,12 +3052,13 @@ send_items(Host, Node, NodeId, Type, LJID, Number) ->
 ).
 
 dispatch_items(_From, _To, _Node, _Stanza = undefined) -> ok;
-dispatch_items(From, {U, S, R}, Node, Stanza) when is_tuple(From) ->
-    case ejabberd_sm:get_session_pid(U, S, R) of
+dispatch_items(From, {ToU, ToS, ToR} = To, Node, Stanza) ->
+    case ejabberd_sm:get_session_pid(ToU, ToS, ToR) of
       C2SPid when is_pid(C2SPid) ->
-	  ejabberd_c2s:broadcast(C2SPid,
-				 {pep_message, <<((Node))/binary, "+notify">>},
-				 service_jid(From), Stanza);
+	  ejabberd_c2s:send_filtered(C2SPid,
+				     {pep_message, <<Node/binary, "+notify">>},
+				     service_jid(From), jlib:make_jid(To),
+				     Stanza)
       _ -> ok
     end;
 dispatch_items(From, To, _Node, Stanza) ->