Use the -epmd_module flag consistently

If the -epmd_module flag has been specified on the command line, use
that module to register and look up node names instead of the default,
erl_epmd.

Also document this option.

5 files changed, 15 insertions, 5 deletions

diff --git a/erts/doc/src/init.xml b/erts/doc/src/init.xml
index 84a5aea335..878a33c9ca 100644
--- a/erts/doc/src/init.xml
+++ b/erts/doc/src/init.xml
@@ -241,6 +241,11 @@
          marker="kernel:code">code(3)</seealso>.</p>
 	 
       </item>
+      <tag><c>-epmd_module Module</c></tag>
+      <item>
+        <p>Specifies the module to use for registration and lookup of
+          node names.  Defaults to <c>erl_epmd</c>.</p>
+      </item>
       <tag><c>-eval Expr</c></tag>
       <item>
         <p>Scans, parses and evaluates an arbitrary expression
diff --git a/lib/kernel/src/inet_tcp_dist.erl b/lib/kernel/src/inet_tcp_dist.erl
index 64b28bb49b..f91d7ef7c3 100644
--- a/lib/kernel/src/inet_tcp_dist.erl
+++ b/lib/kernel/src/inet_tcp_dist.erl
@@ -73,7 +73,8 @@ gen_listen(Driver, Name) ->
 	{ok, Socket} ->
 	    TcpAddress = get_tcp_address(Driver, Socket),
 	    {_,Port} = TcpAddress#net_address.address,
-	    case erl_epmd:register_node(Name, Port) of
+	    ErlEpmd = net_kernel:epmd_module(),
+	    case ErlEpmd:register_node(Name, Port) of
 		{ok, Creation} ->
 		    {ok, {Socket, TcpAddress, Creation}};
 		Error ->
@@ -280,7 +281,8 @@ do_setup(Driver, Kernel, Node, Type, MyNode, LongOrShortNames, SetupTime) ->
     case inet:getaddr(Address, AddressFamily) of
 	{ok, Ip} ->
 	    Timer = dist_util:start_timer(SetupTime),
-	    case erl_epmd:port_please(Name, Ip) of
+	    ErlEpmd = net_kernel:epmd_module(),
+	    case ErlEpmd:port_please(Name, Ip) of
 		{port, TcpPort, Version} ->
 		    ?trace("port_please(~p) -> version ~p~n", 
 			   [Node,Version]),
diff --git a/lib/kernel/src/net_adm.erl b/lib/kernel/src/net_adm.erl
index a38356c224..8ec275b88b 100644
--- a/lib/kernel/src/net_adm.erl
+++ b/lib/kernel/src/net_adm.erl
@@ -96,7 +96,8 @@ names() ->
       Reason :: address | file:posix().
 
 names(Hostname) ->
-    erl_epmd:names(Hostname).
+    ErlEpmd = net_kernel:epmd_module(),
+    ErlEpmd:names(Hostname).
 
 -spec dns_hostname(Host) -> {ok, Name} | {error, Host} when
       Host :: atom() | string(),
diff --git a/lib/ssl/src/inet_tls_dist.erl b/lib/ssl/src/inet_tls_dist.erl
index 3481e89af0..0da4b3587f 100644
--- a/lib/ssl/src/inet_tls_dist.erl
+++ b/lib/ssl/src/inet_tls_dist.erl
@@ -87,7 +87,8 @@ do_setup(Driver, Kernel, Node, Type, MyNode, LongOrShortNames, SetupTime) ->
     case inet:getaddr(Address, Driver:family()) of
 	{ok, Ip} ->
 	    Timer = dist_util:start_timer(SetupTime),
-	    case erl_epmd:port_please(Name, Ip) of
+	    ErlEpmd = net_kernel:epmd_module(),
+	    case ErlEpmd:port_please(Name, Ip) of
 		{port, TcpPort, Version} ->
 		    ?trace("port_please(~p) -> version ~p~n", 
 			   [Node,Version]),
diff --git a/lib/ssl/src/ssl_tls_dist_proxy.erl b/lib/ssl/src/ssl_tls_dist_proxy.erl
index 4651687fe6..2e308a15b7 100644
--- a/lib/ssl/src/ssl_tls_dist_proxy.erl
+++ b/lib/ssl/src/ssl_tls_dist_proxy.erl
@@ -116,7 +116,8 @@ handle_call({listen, Driver, Name}, _From, State) ->
 	    {ok, TcpAddress} = get_tcp_address(Socket),
 	    {ok, WorldTcpAddress} = get_tcp_address(World),
 	    {_,Port} = WorldTcpAddress#net_address.address,
-	    case erl_epmd:register_node(Name, Port) of
+	    ErlEpmd = net_kernel:epmd_module(),
+	    case ErlEpmd:register_node(Name, Port) of
 		{ok, Creation} ->
 		    {reply, {ok, {Socket, TcpAddress, Creation}},
 		     State#state{listen={Socket, World}}};