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authorMagnus Henoch <magnus@erlang-solutions.com>2016-05-25 17:35:11 +0100
committerMagnus Henoch <magnus@erlang-solutions.com>2016-05-25 17:45:45 +0100
commit8ff06daa90c7c3c599c9e8cbc93fe98c2ed5ebfa (patch)
tree66c66b7912756ec12592f90fd0b111d079ef85b8 /erts
parent252c60632664fdf54395d54ad8d7b7e9e6e74cca (diff)
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Add tests for -start_epmd and -epmd_module options
For -start_epmd, check that the node starts properly and that we can ping it. For -epmd_module, start two nodes that can communicate only because we supply the correct port number through a command line argument.
Diffstat (limited to 'erts')
-rw-r--r--erts/emulator/test/distribution_SUITE.erl69
1 files changed, 67 insertions, 2 deletions
diff --git a/erts/emulator/test/distribution_SUITE.erl b/erts/emulator/test/distribution_SUITE.erl
index d0096fb1bc..26780f6017 100644
--- a/erts/emulator/test/distribution_SUITE.erl
+++ b/erts/emulator/test/distribution_SUITE.erl
@@ -55,7 +55,8 @@
bad_dist_ext_receive/1,
bad_dist_ext_process_info/1,
bad_dist_ext_control/1,
- bad_dist_ext_connection_id/1]).
+ bad_dist_ext_connection_id/1,
+ start_epmd_false/1, epmd_module/1]).
%% Internal exports.
-export([sender/3, receiver2/2, dummy_waiter/0, dead_process/0,
@@ -64,6 +65,9 @@
dist_evil_parallel_receiver/0,
sendersender/4, sendersender2/4]).
+%% epmd_module exports
+-export([start_link/0, register_node/2, port_please/2]).
+
suite() ->
[{ct_hooks,[ts_install_cth]},
{timetrap, {minutes, 4}}].
@@ -76,7 +80,8 @@ all() ->
{group, trap_bif}, {group, dist_auto_connect},
dist_parallel_send, atom_roundtrip, unicode_atom_roundtrip, atom_roundtrip_r15b,
contended_atom_cache_entry, contended_unicode_atom_cache_entry,
- bad_dist_structure, {group, bad_dist_ext}].
+ bad_dist_structure, {group, bad_dist_ext},
+ start_epmd_false, epmd_module].
groups() ->
[{bulk_send, [], [bulk_send_small, bulk_send_big, bulk_send_bigbig]},
@@ -1881,6 +1886,66 @@ dmsg_ext(Term) ->
dmsg_bad_atom_cache_ref() ->
[$R, 137].
+start_epmd_false(Config) when is_list(Config) ->
+ %% Start a node with the option -start_epmd false.
+ {ok, OtherNode} = start_node(start_epmd_false, "-start_epmd false"),
+ %% We should be able to ping it, as epmd was started by us:
+ pong = net_adm:ping(OtherNode),
+ stop_node(OtherNode),
+
+ ok.
+
+epmd_module(Config) when is_list(Config) ->
+ %% We need a relay node to test this, since the test node uses the
+ %% standard epmd module.
+ Sock1 = start_relay_node(epmd_module_node1, "-epmd_module " ++ ?MODULE_STRING),
+ Node1 = inet_rpc_nodename(Sock1),
+ %% Ask what port it's listening on - it won't have registered with
+ %% epmd.
+ {ok, {ok, Port1}} = do_inet_rpc(Sock1, application, get_env, [kernel, dist_listen_port]),
+
+ %% Start a second node, passing the port number as a secret
+ %% argument.
+ Sock2 = start_relay_node(epmd_module_node2, "-epmd_module " ++ ?MODULE_STRING
+ ++ " -other_node_port " ++ integer_to_list(Port1)),
+ Node2 = inet_rpc_nodename(Sock2),
+ %% Node 1 can't ping node 2
+ {ok, pang} = do_inet_rpc(Sock1, net_adm, ping, [Node2]),
+ {ok, []} = do_inet_rpc(Sock1, erlang, nodes, []),
+ {ok, []} = do_inet_rpc(Sock2, erlang, nodes, []),
+ %% But node 2 can ping node 1
+ {ok, pong} = do_inet_rpc(Sock2, net_adm, ping, [Node1]),
+ {ok, [Node2]} = do_inet_rpc(Sock1, erlang, nodes, []),
+ {ok, [Node1]} = do_inet_rpc(Sock2, erlang, nodes, []),
+
+ stop_relay_node(Sock2),
+ stop_relay_node(Sock1).
+
+%% epmd_module functions:
+
+start_link() ->
+ ignore.
+
+register_node(_Name, Port) ->
+ %% Save the port number we're listening on.
+ application:set_env(kernel, dist_listen_port, Port),
+ Creation = rand:uniform(3),
+ {ok, Creation}.
+
+port_please(_Name, _Ip) ->
+ case init:get_argument(other_node_port) of
+ error ->
+ %% None specified. Default to 42.
+ Port = 42,
+ Version = 5,
+ {port, Port, Version};
+ {ok, [[PortS]]} ->
+ %% Port number given on command line.
+ Port = list_to_integer(PortS),
+ Version = 5,
+ {port, Port, Version}
+ end.
+
%%% Utilities
timestamp() ->