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-rw-r--r--lib/kernel/src/net_kernel.erl38
-rw-r--r--lib/kernel/test/erl_distribution_SUITE.erl99
2 files changed, 129 insertions, 8 deletions
diff --git a/lib/kernel/src/net_kernel.erl b/lib/kernel/src/net_kernel.erl
index 0a9f9316b0..9921a0adfd 100644
--- a/lib/kernel/src/net_kernel.erl
+++ b/lib/kernel/src/net_kernel.erl
@@ -1262,11 +1262,22 @@ create_name(Name, LongOrShortNames, Try) ->
{Head,Host1} = create_hostpart(Name, LongOrShortNames),
case Host1 of
{ok,HostPart} ->
- {ok,list_to_atom(Head ++ HostPart)};
+ case valid_name_head(Head) of
+ true ->
+ {ok,list_to_atom(Head ++ HostPart)};
+ false ->
+ error_logger:info_msg("Invalid node name!\n"
+ "Please check your configuration\n"),
+ {error, badarg}
+ end;
{error,long} when Try =:= 1 ->
%% It could be we haven't read domain name from resolv file yet
inet_config:do_load_resolv(os:type(), longnames),
create_name(Name, LongOrShortNames, 0);
+ {error, hostname_not_allowed} ->
+ error_logger:info_msg("Invalid node name!\n"
+ "Please check your configuration\n"),
+ {error, badarg};
{error,Type} ->
error_logger:info_msg(
lists:concat(["Can\'t set ",
@@ -1279,12 +1290,13 @@ create_name(Name, LongOrShortNames, Try) ->
create_hostpart(Name, LongOrShortNames) ->
{Head,Host} = split_node(Name),
Host1 = case {Host,LongOrShortNames} of
- {[$@,_|_],longnames} ->
- {ok,Host};
+ {[$@,_|_] = Host,longnames} ->
+ validate_hostname(Host);
{[$@,_|_],shortnames} ->
case lists:member($.,Host) of
true -> {error,short};
- _ -> {ok,Host}
+ _ ->
+ validate_hostname(Host)
end;
{_,shortnames} ->
case inet_db:gethostname() of
@@ -1304,6 +1316,24 @@ create_hostpart(Name, LongOrShortNames) ->
end,
{Head,Host1}.
+validate_hostname([$@|HostPart] = Host) ->
+ {ok, MP} = re:compile("^[!-ÿ]*$", [unicode]),
+ case re:run(HostPart, MP) of
+ {match, _} ->
+ {ok, Host};
+ nomatch ->
+ {error, hostname_not_allowed}
+ end.
+
+valid_name_head(Head) ->
+ {ok, MP} = re:compile("^[0-9A-Za-z_\\-]*$", [unicode]),
+ case re:run(Head, MP) of
+ {match, _} ->
+ true;
+ nomatch ->
+ false
+ end.
+
split_node(Name) ->
lists:splitwith(fun(C) -> C =/= $@ end, atom_to_list(Name)).
diff --git a/lib/kernel/test/erl_distribution_SUITE.erl b/lib/kernel/test/erl_distribution_SUITE.erl
index 09c80a0956..ecfa3d6cdb 100644
--- a/lib/kernel/test/erl_distribution_SUITE.erl
+++ b/lib/kernel/test/erl_distribution_SUITE.erl
@@ -24,7 +24,9 @@
-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1,
init_per_group/2,end_per_group/2]).
--export([tick/1, tick_change/1, illegal_nodenames/1, hidden_node/1,
+-export([tick/1, tick_change/1,
+ nodenames/1, hostnames/1,
+ illegal_nodenames/1, hidden_node/1,
setopts/1,
table_waste/1, net_setuptime/1,
inet_dist_options_options/1,
@@ -53,7 +55,6 @@
-export([pinger/1]).
-
-define(DUMMY_NODE,dummy@test01).
%%-----------------------------------------------------------------
@@ -68,8 +69,8 @@ suite() ->
{timetrap,{minutes,4}}].
all() ->
- [tick, tick_change, illegal_nodenames, hidden_node,
- setopts,
+ [tick, tick_change, nodenames, hostnames, illegal_nodenames,
+ hidden_node, setopts,
table_waste, net_setuptime, inet_dist_options_options,
{group, monitor_nodes}].
@@ -179,7 +180,97 @@ table_waste(Config) when is_list(Config) ->
stop_node(N),
ok.
+%% Test that starting nodes with different legal name part works, and that illegal
+%% ones are filtered
+nodenames(Config) when is_list(Config) ->
+ legal("a1@b"),
+ legal("a-1@b"),
+ legal("a_1@b"),
+
+ illegal("cdé@a"),
+ illegal("te欢st@a").
+
+%% Test that starting nodes with different legal host part works, and that illegal
+%% ones are filtered
+hostnames(Config) when is_list(Config) ->
+ Host = gethostname(),
+ legal([$a,$@|atom_to_list(Host)]),
+ legal("1@b1"),
+ legal("b@b1-c"),
+ legal("c@b1_c"),
+ legal("d@b1#c"),
+ legal("f@::1"),
+ legal("g@1:bc3:4e3f:f20:0:1"),
+
+ case file:native_name_encoding() of
+ latin1 -> ignore;
+ _ -> legal("e@b1é")
+ end,
+ long_hostnames(net_kernel:longnames()),
+
+ illegal("h@testالع"),
+ illegal("i@языtest"),
+ illegal("j@te欢st").
+
+long_hostnames(true) ->
+ legal("[email protected]"),
+ legal("[email protected]"),
+ legal("[email protected]_c.d"),
+ legal("[email protected]"),
+ legal("[email protected]");
+long_hostnames(false) ->
+ illegal("[email protected]").
+
+legal(Name) ->
+ case test_node(Name) of
+ started ->
+ ok;
+ not_started ->
+ ct:fail("no ~p node started", [Name])
+ end.
+
+illegal(Name) ->
+ case test_node(Name) of
+ not_started ->
+ ok;
+ started ->
+ ct:fail("~p node started with illegal name", [Name])
+ end.
+test_node(Name) ->
+ ProgName = atom_to_list(lib:progname()),
+ Command = ProgName ++ " -noinput " ++ long_or_short() ++ Name ++
+ " -eval \"net_adm:ping('" ++ atom_to_list(node()) ++ "')\"",
+ net_kernel:monitor_nodes(true),
+ BinCommand = unicode:characters_to_binary(Command, utf8),
+ open_port({spawn, BinCommand}, [stream]),
+ Node = list_to_atom(Name),
+ receive
+ {nodeup, Node} ->
+ net_kernel:monitor_nodes(false),
+ slave:stop(Node),
+ started
+ after 5000 ->
+ net_kernel:monitor_nodes(false),
+ not_started
+ end.
+
+long_or_short() ->
+ case net_kernel:longnames() of
+ true -> " -name ";
+ false -> " -sname "
+ end.
+
+% get the localhost's name, depending on the using name policy
+gethostname() ->
+ Hostname = case net_kernel:longnames() of
+ true->
+ net_adm:localhost();
+ _->
+ {ok, Name}=inet:gethostname(),
+ Name
+ end,
+ list_to_atom(Hostname).
%% Test that pinging an illegal nodename does not kill the node.
illegal_nodenames(Config) when is_list(Config) ->