Merge bug25266

6 files changed, 71 insertions, 39 deletions

diff --git a/docs/rabbitmqctl.1.xml b/docs/rabbitmqctl.1.xml
index 3082fe14..34947b66 100644
--- a/docs/rabbitmqctl.1.xml
+++ b/docs/rabbitmqctl.1.xml
@@ -1282,22 +1282,26 @@
                 <listitem><para>Readable name for the connection.</para></listitem>
               </varlistentry>
               <varlistentry>
-                <term>address</term>
-                <listitem><para>Server IP address.</para></listitem>
-              </varlistentry>
-              <varlistentry>
                 <term>port</term>
                 <listitem><para>Server port.</para></listitem>
               </varlistentry>
               <varlistentry>
-                <term>peer_address</term>
-                <listitem><para>Peer address.</para></listitem>
+                <term>host</term>
+                <listitem><para>Server hostname obtained via reverse
+                DNS, or its IP address if reverse DNS failed or was
+                not enabled.</para></listitem>
               </varlistentry>
               <varlistentry>
                 <term>peer_port</term>
                 <listitem><para>Peer port.</para></listitem>
               </varlistentry>
               <varlistentry>
+                <term>peer_host</term>
+                <listitem><para>Peer hostname obtained via reverse
+                DNS, or its IP address if reverse DNS failed or was
+                not enabled.</para></listitem>
+              </varlistentry>
+              <varlistentry>
                 <term>ssl</term>
                 <listitem><para>Boolean indicating whether the
                 connection is secured with SSL.</para></listitem>
@@ -1414,7 +1418,7 @@
             </variablelist>
             <para>
               If no <command>connectioninfoitem</command>s are
-              specified then user, peer address, peer port, time since
+              specified then user, peer host, peer port, time since
               flow control and memory block state are displayed.
             </para>
 
diff --git a/ebin/rabbit_app.in b/ebin/rabbit_app.in
index 9b1ff8bd..16dfd196 100644
--- a/ebin/rabbit_app.in
+++ b/ebin/rabbit_app.in
@@ -43,6 +43,7 @@
          {trace_vhosts, []},
          {log_levels, [{connection, info}]},
          {ssl_cert_login_from, distinguished_name},
+         {reverse_dns_lookups, false},
          {tcp_listen_options, [binary,
                                {packet,        raw},
                                {reuseaddr,     true},
diff --git a/src/rabbit_control_main.erl b/src/rabbit_control_main.erl
index 1b42a847..669a0787 100644
--- a/src/rabbit_control_main.erl
+++ b/src/rabbit_control_main.erl
@@ -386,7 +386,7 @@ action(list_bindings, Node, Args, Opts, Inform) ->
 
 action(list_connections, Node, Args, _Opts, Inform) ->
     Inform("Listing connections", []),
-    ArgAtoms = default_if_empty(Args, [user, peer_address, peer_port, state]),
+    ArgAtoms = default_if_empty(Args, [user, peer_host, peer_port, state]),
     display_info_list(rpc_call(Node, rabbit_networking, connection_info_all,
                                [ArgAtoms]),
                       ArgAtoms);
diff --git a/src/rabbit_net.erl b/src/rabbit_net.erl
index 038154c3..562fc197 100644
--- a/src/rabbit_net.erl
+++ b/src/rabbit_net.erl
@@ -20,7 +20,7 @@
 -export([is_ssl/1, ssl_info/1, controlling_process/2, getstat/2,
          recv/1, async_recv/3, port_command/2, getopts/2, setopts/2, send/2,
          close/1, fast_close/1, sockname/1, peername/1, peercert/1,
-         tune_buffer_size/1, connection_string/2]).
+         tune_buffer_size/1, connection_string/2, socket_ends/2]).
 
 %%---------------------------------------------------------------------------
 
@@ -36,7 +36,7 @@
 -type(socket() :: port() | #ssl_socket{}).
 -type(opts() :: [{atom(), any()} |
                  {raw, non_neg_integer(), non_neg_integer(), binary()}]).
-
+-type(host_or_ip() :: binary() | inet:ip_address()).
 -spec(is_ssl/1 :: (socket()) -> boolean()).
 -spec(ssl_info/1 :: (socket())
                     -> 'nossl' | ok_val_or_error(
@@ -72,6 +72,10 @@
 -spec(tune_buffer_size/1 :: (socket()) -> ok_or_any_error()).
 -spec(connection_string/2 ::
         (socket(), 'inbound' | 'outbound') -> ok_val_or_error(string())).
+-spec(socket_ends/2 ::
+        (socket(), 'inbound' | 'outbound')
+        -> ok_val_or_error({host_or_ip(), rabbit_networking:ip_port(),
+                            host_or_ip(), rabbit_networking:ip_port()})).
 
 -endif.
 
@@ -193,17 +197,37 @@ tune_buffer_size(Sock) ->
     end.
 
 connection_string(Sock, Direction) ->
-    {From, To} = case Direction of
-                     inbound  -> {fun peername/1, fun sockname/1};
-                     outbound -> {fun sockname/1, fun peername/1}
-                 end,
+    case socket_ends(Sock, Direction) of
+        {ok, {FromAddress, FromPort, ToAddress, ToPort}} ->
+            {ok, rabbit_misc:format(
+                   "~s:~p -> ~s:~p",
+                   [maybe_ntoab(FromAddress), FromPort,
+                    maybe_ntoab(ToAddress),   ToPort])};
+        Error ->
+            Error
+    end.
+
+socket_ends(Sock, Direction) ->
+    {From, To} = sock_funs(Direction),
     case {From(Sock), To(Sock)} of
         {{ok, {FromAddress, FromPort}}, {ok, {ToAddress, ToPort}}} ->
-            {ok, rabbit_misc:format("~s:~p -> ~s:~p",
-                                    [rabbit_misc:ntoab(FromAddress), FromPort,
-                                     rabbit_misc:ntoab(ToAddress),   ToPort])};
+            {ok, {rdns(FromAddress), FromPort,
+                  rdns(ToAddress),   ToPort}};
         {{error, _Reason} = Error, _} ->
             Error;
         {_, {error, _Reason} = Error} ->
             Error
     end.
+
+maybe_ntoab(Addr) when is_tuple(Addr) -> rabbit_misc:ntoab(Addr);
+maybe_ntoab(Host)                     -> Host.
+
+rdns(Addr) ->
+    {ok, Lookup} = application:get_env(rabbit, reverse_dns_lookups),
+    case Lookup of
+        true -> list_to_binary(rabbit_networking:tcp_host(Addr));
+        _    -> Addr
+    end.
+
+sock_funs(inbound)  -> {fun peername/1, fun sockname/1};
+sock_funs(outbound) -> {fun sockname/1, fun peername/1}.
diff --git a/src/rabbit_networking.erl b/src/rabbit_networking.erl
index 5cf8d1ae..31eeef73 100644
--- a/src/rabbit_networking.erl
+++ b/src/rabbit_networking.erl
@@ -21,7 +21,7 @@
          node_listeners/1, connections/0, connection_info_keys/0,
          connection_info/1, connection_info/2,
          connection_info_all/0, connection_info_all/1,
-         close_connection/2, force_connection_event_refresh/0]).
+         close_connection/2, force_connection_event_refresh/0, tcp_host/1]).
 
 %%used by TCP-based transports, e.g. STOMP adapter
 -export([tcp_listener_addresses/1, tcp_listener_spec/6,
diff --git a/src/rabbit_reader.erl b/src/rabbit_reader.erl
index 829e9e52..928786e9 100644
--- a/src/rabbit_reader.erl
+++ b/src/rabbit_reader.erl
@@ -39,19 +39,19 @@
              connection_state, queue_collector, heartbeater, stats_timer,
              channel_sup_sup_pid, start_heartbeat_fun, buf, buf_len,
              auth_mechanism, auth_state, conserve_resources,
-             last_blocked_by, last_blocked_at}).
+             last_blocked_by, last_blocked_at, host, peer_host,
+             port, peer_port}).
 
 -define(STATISTICS_KEYS, [pid, recv_oct, recv_cnt, send_oct, send_cnt,
                           send_pend, state, last_blocked_by, last_blocked_age,
                           channels]).
 
--define(CREATION_EVENT_KEYS, [pid, name, address, port, peer_address, peer_port,
-                              ssl, peer_cert_subject, peer_cert_issuer,
-                              peer_cert_validity, auth_mechanism,
-                              ssl_protocol, ssl_key_exchange,
-                              ssl_cipher, ssl_hash,
-                              protocol, user, vhost, timeout, frame_max,
-                              client_properties]).
+-define(CREATION_EVENT_KEYS,
+        [pid, name, port, peer_port, host,
+        peer_host, ssl, peer_cert_subject, peer_cert_issuer,
+        peer_cert_validity, auth_mechanism, ssl_protocol,
+        ssl_key_exchange, ssl_cipher, ssl_hash, protocol, user, vhost,
+        timeout, frame_max, client_properties]).
 
 -define(INFO_KEYS, ?CREATION_EVENT_KEYS ++ ?STATISTICS_KEYS -- [pid]).
 
@@ -192,17 +192,20 @@ socket_op(Sock, Fun) ->
 name(Sock) ->
     socket_op(Sock, fun (S) -> rabbit_net:connection_string(S, inbound) end).
 
+socket_ends(Sock) ->
+    socket_op(Sock, fun (S) -> rabbit_net:socket_ends(S, inbound) end).
+
 start_connection(Parent, ChannelSupSupPid, Collector, StartHeartbeatFun, Deb,
                  Sock, SockTransform) ->
     process_flag(trap_exit, true),
     Name = name(Sock),
     log(info, "accepting AMQP connection ~p (~s)~n", [self(), Name]),
     ClientSock = socket_op(Sock, SockTransform),
-    erlang:send_after(?HANDSHAKE_TIMEOUT * 1000, self(),
-                      handshake_timeout),
+    erlang:send_after(?HANDSHAKE_TIMEOUT * 1000, self(), handshake_timeout),
+    {PeerHost, PeerPort, Host, Port} = socket_ends(Sock),
     State = #v1{parent              = Parent,
                 sock                = ClientSock,
-                name                = Name,
+                name                = list_to_binary(Name),
                 connection          = #connection{
                   protocol           = none,
                   user               = none,
@@ -225,7 +228,11 @@ start_connection(Parent, ChannelSupSupPid, Collector, StartHeartbeatFun, Deb,
                 auth_state          = none,
                 conserve_resources  = false,
                 last_blocked_by     = none,
-                last_blocked_at     = never},
+                last_blocked_at     = never,
+                host                = Host,
+                peer_host           = PeerHost,
+                port                = Port,
+                peer_port           = PeerPort},
     try
         ok = inet_op(fun () -> rabbit_net:tune_buffer_size(ClientSock) end),
         recvloop(Deb, switch_callback(rabbit_event:init_stats_timer(
@@ -894,15 +901,11 @@ auth_phase(Response,
 infos(Items, State) -> [{Item, i(Item, State)} || Item <- Items].
 
 i(pid,                #v1{}) -> self();
-i(name,               #v1{name = Name}) -> list_to_binary(Name);
-i(address,            S) -> socket_info(fun rabbit_net:sockname/1,
-                                        fun ({A, _}) -> A end, S);
-i(port,               S) -> socket_info(fun rabbit_net:sockname/1,
-                                        fun ({_, P}) -> P end, S);
-i(peer_address,       S) -> socket_info(fun rabbit_net:peername/1,
-                                        fun ({A, _}) -> A end, S);
-i(peer_port,          S) -> socket_info(fun rabbit_net:peername/1,
-                                        fun ({_, P}) -> P end, S);
+i(name,               #v1{name      = Name})     -> Name;
+i(host,               #v1{host      = Host})     -> Host;
+i(peer_host,          #v1{peer_host = PeerHost}) -> PeerHost;
+i(port,               #v1{port      = Port})     -> Port;
+i(peer_port,          #v1{peer_port = PeerPort}) -> PeerPort;
 i(SockStat,           S) when SockStat =:= recv_oct;
                               SockStat =:= recv_cnt;
                               SockStat =:= send_oct;