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authorRaimo Niskanen <[email protected]>2017-09-29 14:48:18 +0200
committerRaimo Niskanen <[email protected]>2017-09-29 14:48:18 +0200
commitd0875a87fc59bea515294455b2047040118f3a7e (patch)
tree2004f9733d6cc1a5d5ee6928902e8c30dda1a5c2 /lib
parent5d718bac1d90ff38bd090c0c8bacdb75d0c88085 (diff)
parentcb1b585a710a3f5c724749ce267f55d3c1f85503 (diff)
downloadotp-d0875a87fc59bea515294455b2047040118f3a7e.tar.gz
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Merge branch 'raimo/ssl-dist-skip-loopback/OTP-14465'
* raimo/ssl-dist-skip-loopback/OTP-14465: Update runtime dependencies Disable debug function Pass all info's to the ssl_connection state function Remove ssl_tls_dist_ctrl module Remove ssl_tls_dist_ctrl process Remove ssl_tls_dist_proxy Avoid dialyzer warning Separate in and out in dist ctrl Rewrite dist ctrl from port to process Conflicts: lib/ssl/src/ssl.app.src
Diffstat (limited to 'lib')
-rw-r--r--lib/ssl/src/Makefile5
-rw-r--r--lib/ssl/src/dtls_connection.erl2
-rw-r--r--lib/ssl/src/inet6_tls_dist.erl7
-rw-r--r--lib/ssl/src/inet_tls_dist.erl664
-rw-r--r--lib/ssl/src/ssl.app.src7
-rw-r--r--lib/ssl/src/ssl_connection.erl243
-rw-r--r--lib/ssl/src/ssl_dist_sup.erl14
-rw-r--r--lib/ssl/src/ssl_tls_dist_proxy.erl479
-rw-r--r--lib/ssl/src/tls_connection.erl11
9 files changed, 738 insertions, 694 deletions
diff --git a/lib/ssl/src/Makefile b/lib/ssl/src/Makefile
index 2e7df9792e..8eba5cf347 100644
--- a/lib/ssl/src/Makefile
+++ b/lib/ssl/src/Makefile
@@ -1,7 +1,7 @@
#
# %CopyrightBegin%
#
-# Copyright Ericsson AB 1999-2016. All Rights Reserved.
+# Copyright Ericsson AB 1999-2017. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
@@ -87,8 +87,7 @@ MODULES= \
ssl_v2 \
ssl_v3 \
tls_v1 \
- dtls_v1 \
- ssl_tls_dist_proxy
+ dtls_v1
INTERNAL_HRL_FILES = \
ssl_alert.hrl ssl_cipher.hrl \
diff --git a/lib/ssl/src/dtls_connection.erl b/lib/ssl/src/dtls_connection.erl
index ff3e69bae5..ad560c0756 100644
--- a/lib/ssl/src/dtls_connection.erl
+++ b/lib/ssl/src/dtls_connection.erl
@@ -540,7 +540,7 @@ handle_info(new_cookie_secret, StateName,
CookieInfo#{current_cookie_secret => dtls_v1:cookie_secret(),
previous_cookie_secret => Secret}}};
handle_info(Msg, StateName, State) ->
- ssl_connection:handle_info(Msg, StateName, State).
+ ssl_connection:StateName(info, Msg, State, ?MODULE).
handle_call(Event, From, StateName, State) ->
diff --git a/lib/ssl/src/inet6_tls_dist.erl b/lib/ssl/src/inet6_tls_dist.erl
index ffd7296f93..96ce4d493a 100644
--- a/lib/ssl/src/inet6_tls_dist.erl
+++ b/lib/ssl/src/inet6_tls_dist.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2015. All Rights Reserved.
+%% Copyright Ericsson AB 2015-2017. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
@@ -21,7 +21,8 @@
%%
-module(inet6_tls_dist).
--export([childspecs/0, listen/1, accept/1, accept_connection/5,
+-export([childspecs/0]).
+-export([listen/1, accept/1, accept_connection/5,
setup/5, close/1, select/1]).
childspecs() ->
@@ -43,4 +44,4 @@ setup(Node, Type, MyNode, LongOrShortNames,SetupTime) ->
inet_tls_dist:gen_setup(inet6_tcp, Node, Type, MyNode, LongOrShortNames,SetupTime).
close(Socket) ->
- inet_tls_dist:close(Socket).
+ inet_tls_dist:gen_close(inet6_tcp, Socket).
diff --git a/lib/ssl/src/inet_tls_dist.erl b/lib/ssl/src/inet_tls_dist.erl
index 0da4b3587f..d644cbe66a 100644
--- a/lib/ssl/src/inet_tls_dist.erl
+++ b/lib/ssl/src/inet_tls_dist.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2011-2016. All Rights Reserved.
+%% Copyright Ericsson AB 2011-2017. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
@@ -21,17 +21,26 @@
%%
-module(inet_tls_dist).
--export([childspecs/0, listen/1, accept/1, accept_connection/5,
+-export([childspecs/0]).
+-export([listen/1, accept/1, accept_connection/5,
setup/5, close/1, select/1, is_node_name/1]).
%% Generalized dist API
-export([gen_listen/2, gen_accept/2, gen_accept_connection/6,
- gen_setup/6, gen_select/2]).
+ gen_setup/6, gen_close/2, gen_select/2]).
+
+-export([split_node/1, nodelay/0]).
+
+-export([dbg/0]). % Debug
-include_lib("kernel/include/net_address.hrl").
-include_lib("kernel/include/dist.hrl").
-include_lib("kernel/include/dist_util.hrl").
+-include("ssl_api.hrl").
+
+%% -------------------------------------------------------------------------
+
childspecs() ->
{ok, [{ssl_dist_sup,{ssl_dist_sup, start_link, []},
permanent, infinity, supervisor, [ssl_dist_sup]}]}.
@@ -40,111 +49,366 @@ select(Node) ->
gen_select(inet_tcp, Node).
gen_select(Driver, Node) ->
- case split_node(atom_to_list(Node), $@, []) of
- [_, Host] ->
- case inet:getaddr(Host, Driver:family()) of
+ case split_node(Node) of
+ false ->
+ false;
+ Host ->
+ case Driver:getaddr(Host) of
{ok, _} -> true;
_ -> false
- end;
- _ ->
- false
+ end
end.
-is_node_name(Node) when is_atom(Node) ->
- select(Node);
-is_node_name(_) ->
- false.
+%% -------------------------------------------------------------------------
+
+is_node_name(Node) ->
+ case split_node(Node) of
+ false ->
+ false;
+ _Host ->
+ true
+ end.
+
+%% -------------------------------------------------------------------------
+
+hs_data_common(#sslsocket{pid = DistCtrl} = SslSocket) ->
+ #hs_data{
+ f_send =
+ fun (Ctrl, Packet) when Ctrl == DistCtrl ->
+ f_send(SslSocket, Packet)
+ end,
+ f_recv =
+ fun (Ctrl, Length, Timeout) when Ctrl == DistCtrl ->
+ f_recv(SslSocket, Length, Timeout)
+ end,
+ f_setopts_pre_nodeup =
+ fun (Ctrl) when Ctrl == DistCtrl ->
+ f_setopts_pre_nodeup(SslSocket)
+ end,
+ f_setopts_post_nodeup =
+ fun (Ctrl) when Ctrl == DistCtrl ->
+%%% sys:trace(Ctrl, true),
+ f_setopts_post_nodeup(SslSocket)
+ end,
+ f_getll =
+ fun (Ctrl) when Ctrl == DistCtrl ->
+ f_getll(DistCtrl)
+ end,
+ f_address =
+ fun (Ctrl, Node) when Ctrl == DistCtrl ->
+ f_address(SslSocket, Node)
+ end,
+ mf_tick =
+ fun (Ctrl) when Ctrl == DistCtrl ->
+ mf_tick(DistCtrl)
+ end,
+ mf_getstat =
+ fun (Ctrl) when Ctrl == DistCtrl ->
+ mf_getstat(SslSocket)
+ end,
+ mf_setopts =
+ fun (Ctrl, Opts) when Ctrl == DistCtrl ->
+ mf_setopts(SslSocket, Opts)
+ end,
+ mf_getopts =
+ fun (Ctrl, Opts) when Ctrl == DistCtrl ->
+ mf_getopts(SslSocket, Opts)
+ end,
+ f_handshake_complete =
+ fun (Ctrl, Node, DHandle) when Ctrl == DistCtrl ->
+ f_handshake_complete(DistCtrl, Node, DHandle)
+ end}.
+
+f_send(SslSocket, Packet) ->
+ ssl:send(SslSocket, Packet).
+
+f_recv(SslSocket, Length, Timeout) ->
+ case ssl:recv(SslSocket, Length, Timeout) of
+ {ok, Bin} when is_binary(Bin) ->
+ {ok, binary_to_list(Bin)};
+ Other ->
+ Other
+ end.
+
+f_setopts_pre_nodeup(_SslSocket) ->
+ ok.
+
+f_setopts_post_nodeup(_SslSocket) ->
+ ok.
+
+f_getll(DistCtrl) ->
+ {ok, DistCtrl}.
+
+f_address(SslSocket, Node) ->
+ case ssl:peername(SslSocket) of
+ {ok, Address} ->
+ case split_node(Node) of
+ false ->
+ {error, no_node};
+ Host ->
+ #net_address{
+ address=Address, host=Host,
+ protocol=tls, family=inet}
+ end
+ end.
+
+mf_tick(DistCtrl) ->
+ DistCtrl ! tick,
+ ok.
+
+mf_getstat(SslSocket) ->
+ case ssl:getstat(
+ SslSocket, [recv_cnt, send_cnt, send_pend]) of
+ {ok, Stat} ->
+ split_stat(Stat,0,0,0);
+ Error ->
+ Error
+ end.
+
+mf_setopts(SslSocket, Opts) ->
+ case setopts_filter(Opts) of
+ [] ->
+ ssl:setopts(SslSocket, Opts);
+ Opts1 ->
+ {error, {badopts,Opts1}}
+ end.
+
+mf_getopts(SslSocket, Opts) ->
+ ssl:getopts(SslSocket, Opts).
+
+f_handshake_complete(DistCtrl, Node, DHandle) ->
+ ssl_connection:handshake_complete(DistCtrl, Node, DHandle).
+
+
+setopts_filter(Opts) ->
+ [Opt || {K,_} = Opt <- Opts,
+ K =:= active orelse K =:= deliver orelse K =:= packet].
+
+split_stat([{recv_cnt, R}|Stat], _, W, P) ->
+ split_stat(Stat, R, W, P);
+split_stat([{send_cnt, W}|Stat], R, _, P) ->
+ split_stat(Stat, R, W, P);
+split_stat([{send_pend, P}|Stat], R, W, _) ->
+ split_stat(Stat, R, W, P);
+split_stat([], R, W, P) ->
+ {ok, R, W, P}.
+
+%% -------------------------------------------------------------------------
listen(Name) ->
gen_listen(inet_tcp, Name).
gen_listen(Driver, Name) ->
- ssl_tls_dist_proxy:listen(Driver, Name).
+ case inet_tcp_dist:gen_listen(Driver, Name) of
+ {ok, {Socket, Address, Creation}} ->
+ inet:setopts(Socket, [{packet, 4}]),
+ {ok, {Socket, Address#net_address{protocol=tls}, Creation}};
+ Other ->
+ Other
+ end.
+
+%% -------------------------------------------------------------------------
accept(Listen) ->
gen_accept(inet_tcp, Listen).
gen_accept(Driver, Listen) ->
- ssl_tls_dist_proxy:accept(Driver, Listen).
+ Kernel = self(),
+ monitor_pid(
+ spawn_opt(
+ fun () ->
+ accept_loop(Driver, Listen, Kernel)
+ end,
+ [link, {priority, max}])).
-accept_connection(AcceptPid, Socket, MyNode, Allowed, SetupTime) ->
- gen_accept_connection(inet_tcp, AcceptPid, Socket, MyNode, Allowed, SetupTime).
+accept_loop(Driver, Listen, Kernel) ->
+ case Driver:accept(Listen) of
+ {ok, Socket} ->
+ Opts = get_ssl_options(server),
+ wait_for_code_server(),
+ case ssl:ssl_accept(
+ Socket, [{active, false}, {packet, 4}] ++ Opts,
+ net_kernel:connecttime()) of
+ {ok, #sslsocket{pid = DistCtrl} = SslSocket} ->
+ monitor_pid(DistCtrl),
+ trace(
+ Kernel !
+ {accept, self(), DistCtrl,
+ Driver:family(), tls}),
+ receive
+ {Kernel, controller, Pid} ->
+ ok = ssl:controlling_process(SslSocket, Pid),
+ trace(
+ Pid ! {self(), controller});
+ {Kernel, unsupported_protocol} ->
+ exit(trace(unsupported_protocol))
+ end,
+ accept_loop(Driver, Listen, Kernel);
+ {error, {options, _}} = Error ->
+ %% Bad options: that's probably our fault.
+ %% Let's log that.
+ error_logger:error_msg(
+ "Cannot accept TLS distribution connection: ~s~n",
+ [ssl:format_error(Error)]),
+ _ = trace(Error),
+ gen_tcp:close(Socket);
+ Other ->
+ _ = trace(Other),
+ gen_tcp:close(Socket)
+ end;
+ Error ->
+ exit(trace(Error))
+ end,
+ accept_loop(Driver, Listen, Kernel).
-gen_accept_connection(Driver, AcceptPid, Socket, MyNode, Allowed, SetupTime) ->
+wait_for_code_server() ->
+ %% This is an ugly hack. Upgrading a socket to TLS requires the
+ %% crypto module to be loaded. Loading the crypto module triggers
+ %% its on_load function, which calls code:priv_dir/1 to find the
+ %% directory where its NIF library is. However, distribution is
+ %% started earlier than the code server, so the code server is not
+ %% necessarily started yet, and code:priv_dir/1 might fail because
+ %% of that, if we receive an incoming connection on the
+ %% distribution port early enough.
+ %%
+ %% If the on_load function of a module fails, the module is
+ %% unloaded, and the function call that triggered loading it fails
+ %% with 'undef', which is rather confusing.
+ %%
+ %% Thus, the accept process will terminate, and be
+ %% restarted by ssl_dist_sup. However, it won't have any memory
+ %% of being asked by net_kernel to listen for incoming
+ %% connections. Hence, the node will believe that it's open for
+ %% distribution, but it actually isn't.
+ %%
+ %% So let's avoid that by waiting for the code server to start.
+ case whereis(code_server) of
+ undefined ->
+ timer:sleep(10),
+ wait_for_code_server();
+ Pid when is_pid(Pid) ->
+ ok
+ end.
+
+%% -------------------------------------------------------------------------
+
+accept_connection(AcceptPid, DistCtrl, MyNode, Allowed, SetupTime) ->
+ gen_accept_connection(
+ inet_tcp, AcceptPid, DistCtrl, MyNode, Allowed, SetupTime).
+
+gen_accept_connection(
+ Driver, AcceptPid, DistCtrl, MyNode, Allowed, SetupTime) ->
Kernel = self(),
- spawn_link(fun() -> do_accept(Driver, Kernel, AcceptPid, Socket,
- MyNode, Allowed, SetupTime) end).
+ monitor_pid(
+ spawn_opt(
+ fun() ->
+ do_accept(
+ Driver, Kernel, AcceptPid, DistCtrl,
+ MyNode, Allowed, SetupTime)
+ end,
+ [link, {priority, max}])).
+
+do_accept(Driver, Kernel, AcceptPid, DistCtrl, MyNode, Allowed, SetupTime) ->
+ SslSocket = ssl_connection:get_sslsocket(DistCtrl),
+ receive
+ {AcceptPid, controller} ->
+ Timer = dist_util:start_timer(SetupTime),
+ case check_ip(Driver, SslSocket) of
+ true ->
+ HSData0 = hs_data_common(SslSocket),
+ HSData =
+ HSData0#hs_data{
+ kernel_pid = Kernel,
+ this_node = MyNode,
+ socket = DistCtrl,
+ timer = Timer,
+ this_flags = 0,
+ allowed = Allowed},
+ dist_util:handshake_other_started(trace(HSData));
+ {false,IP} ->
+ error_logger:error_msg(
+ "** Connection attempt from "
+ "disallowed IP ~w ** ~n", [IP]),
+ ?shutdown(trace(no_node))
+ end
+ end.
+
+
-setup(Node, Type, MyNode, LongOrShortNames,SetupTime) ->
- gen_setup(inet_tcp, Node, Type, MyNode, LongOrShortNames,SetupTime).
+setup(Node, Type, MyNode, LongOrShortNames, SetupTime) ->
+ gen_setup(inet_tcp, Node, Type, MyNode, LongOrShortNames, SetupTime).
-gen_setup(Driver, Node, Type, MyNode, LongOrShortNames,SetupTime) ->
+gen_setup(Driver, Node, Type, MyNode, LongOrShortNames, SetupTime) ->
Kernel = self(),
- spawn_opt(fun() -> do_setup(Driver, Kernel, Node, Type, MyNode, LongOrShortNames, SetupTime) end, [link, {priority, max}]).
-
+ monitor_pid(
+ spawn_opt(
+ fun() ->
+ do_setup(
+ Driver, Kernel, Node, Type,
+ MyNode, LongOrShortNames, SetupTime)
+ end,
+ [link, {priority, max}])).
+
do_setup(Driver, Kernel, Node, Type, MyNode, LongOrShortNames, SetupTime) ->
[Name, Address] = splitnode(Driver, Node, LongOrShortNames),
- case inet:getaddr(Address, Driver:family()) of
+ case Driver:getaddr(Address) of
{ok, Ip} ->
- Timer = dist_util:start_timer(SetupTime),
+ Timer = trace(dist_util:start_timer(SetupTime)),
ErlEpmd = net_kernel:epmd_module(),
case ErlEpmd:port_please(Name, Ip) of
{port, TcpPort, Version} ->
- ?trace("port_please(~p) -> version ~p~n",
- [Node,Version]),
+ Opts = trace(connect_options(get_ssl_options(client))),
dist_util:reset_timer(Timer),
- case ssl_tls_dist_proxy:connect(Driver, Ip, TcpPort) of
- {ok, Socket} ->
- HSData = connect_hs_data(Kernel, Node, MyNode, Socket,
- Timer, Version, Ip, TcpPort, Address,
- Type),
- dist_util:handshake_we_started(HSData);
+ case ssl:connect(
+ Ip, TcpPort,
+ [binary, {active, false}, {packet, 4},
+ Driver:family(), nodelay()] ++ Opts,
+ net_kernel:connecttime()) of
+ {ok, #sslsocket{pid = DistCtrl} = SslSocket} ->
+ monitor_pid(DistCtrl),
+ ok = ssl:controlling_process(SslSocket, self()),
+ HSData0 = hs_data_common(SslSocket),
+ HSData =
+ HSData0#hs_data{
+ kernel_pid = Kernel,
+ other_node = Node,
+ this_node = MyNode,
+ socket = DistCtrl,
+ timer = Timer,
+ this_flags = 0,
+ other_version = Version,
+ request_type = Type},
+ dist_util:handshake_we_started(trace(HSData));
Other ->
%% Other Node may have closed since
%% port_please !
- ?trace("other node (~p) "
- "closed since port_please.~n",
- [Node]),
- ?shutdown2(Node, {shutdown, {connect_failed, Other}})
+ ?shutdown2(
+ Node,
+ trace({shutdown, {connect_failed, Other}}))
end;
Other ->
- ?trace("port_please (~p) "
- "failed.~n", [Node]),
- ?shutdown2(Node, {shutdown, {port_please_failed, Other}})
+ ?shutdown2(
+ Node,
+ trace({shutdown, {port_please_failed, Other}}))
end;
Other ->
- ?trace("inet_getaddr(~p) "
- "failed (~p).~n", [Node,Other]),
- ?shutdown2(Node, {shutdown, {inet_getaddr_failed, Other}})
+ ?shutdown2(Node, trace({shutdown, {getaddr_failed, Other}}))
end.
close(Socket) ->
- gen_tcp:close(Socket),
- ok.
+ gen_close(inet, Socket).
+
+gen_close(Driver, Socket) ->
+ trace(Driver:close(Socket)).
-do_accept(Driver, Kernel, AcceptPid, Socket, MyNode, Allowed, SetupTime) ->
- process_flag(priority, max),
- receive
- {AcceptPid, controller} ->
- Timer = dist_util:start_timer(SetupTime),
- case check_ip(Driver, Socket) of
- true ->
- HSData = accept_hs_data(Kernel, MyNode, Socket, Timer, Allowed),
- dist_util:handshake_other_started(HSData);
- {false,IP} ->
- error_logger:error_msg("** Connection attempt from "
- "disallowed IP ~w ** ~n", [IP]),
- ?shutdown(no_node)
- end
- end.
%% ------------------------------------------------------------
%% Do only accept new connection attempts from nodes at our
%% own LAN, if the check_ip environment parameter is true.
%% ------------------------------------------------------------
-check_ip(Driver, Socket) ->
+check_ip(Driver, SslSocket) ->
case application:get_env(check_ip) of
{ok, true} ->
- case get_ifs(Socket) of
+ case get_ifs(SslSocket) of
{ok, IFs, IP} ->
check_ip(Driver, IFs, IP);
_ ->
@@ -154,9 +418,18 @@ check_ip(Driver, Socket) ->
true
end.
-get_ifs(Socket) ->
+check_ip(Driver, [{OwnIP, _, Netmask}|IFs], PeerIP) ->
+ case {Driver:mask(Netmask, PeerIP), Driver:mask(Netmask, OwnIP)} of
+ {M, M} -> true;
+ _ -> check_ip(IFs, PeerIP)
+ end;
+check_ip(_Driver, [], PeerIP) ->
+ {false, PeerIP}.
+
+get_ifs(#sslsocket{fd = {gen_tcp, Socket, _}}) ->
case inet:peername(Socket) of
{ok, {IP, _}} ->
+ %% XXX this is seriously broken for IPv6
case inet:getif(Socket) of
{ok, IFs} -> {ok, IFs, IP};
Error -> Error
@@ -165,14 +438,6 @@ get_ifs(Socket) ->
Error
end.
-check_ip(Driver, [{OwnIP, _, Netmask}|IFs], PeerIP) ->
- case {Driver:mask(Netmask, PeerIP), Driver:mask(Netmask, OwnIP)} of
- {M, M} -> true;
- _ -> check_ip(IFs, PeerIP)
- end;
-check_ip(_Driver, [], PeerIP) ->
- {false, PeerIP}.
-
%% If Node is illegal terminate the connection setup!!
splitnode(Driver, Node, LongOrShortNames) ->
@@ -181,11 +446,13 @@ splitnode(Driver, Node, LongOrShortNames) ->
Host = lists:append(Tail),
check_node(Driver, Name, Node, Host, LongOrShortNames);
[_] ->
- error_logger:error_msg("** Nodename ~p illegal, no '@' character **~n",
- [Node]),
+ error_logger:error_msg(
+ "** Nodename ~p illegal, no '@' character **~n",
+ [Node]),
?shutdown(Node);
_ ->
- error_logger:error_msg("** Nodename ~p illegal **~n", [Node]),
+ error_logger:error_msg(
+ "** Nodename ~p illegal **~n", [Node]),
?shutdown(Node)
end.
@@ -196,23 +463,34 @@ check_node(Driver, Name, Node, Host, LongOrShortNames) ->
{ok, _} ->
[Name, Host];
_ ->
- error_logger:error_msg("** System running to use "
- "fully qualified "
- "hostnames **~n"
- "** Hostname ~s is illegal **~n",
- [Host]),
+ error_logger:error_msg(
+ "** System running to use "
+ "fully qualified hostnames **~n"
+ "** Hostname ~s is illegal **~n",
+ [Host]),
?shutdown(Node)
end;
[_, _ | _] when LongOrShortNames == shortnames ->
- error_logger:error_msg("** System NOT running to use fully qualified "
- "hostnames **~n"
- "** Hostname ~s is illegal **~n",
- [Host]),
+ error_logger:error_msg(
+ "** System NOT running to use "
+ "fully qualified hostnames **~n"
+ "** Hostname ~s is illegal **~n",
+ [Host]),
?shutdown(Node);
_ ->
[Name, Host]
end.
+split_node(Node) when is_atom(Node) ->
+ case split_node(atom_to_list(Node), $@, []) of
+ [_, Host] ->
+ Host;
+ _ ->
+ false
+ end;
+split_node(_) ->
+ false.
+%%
split_node([Chr|T], Chr, Ack) ->
[lists:reverse(Ack)|split_node(T, Chr, [])];
split_node([H|T], Chr, Ack) ->
@@ -220,70 +498,154 @@ split_node([H|T], Chr, Ack) ->
split_node([], _, Ack) ->
[lists:reverse(Ack)].
-connect_hs_data(Kernel, Node, MyNode, Socket, Timer, Version, Ip, TcpPort, Address, Type) ->
- common_hs_data(Kernel, MyNode, Socket, Timer,
- #hs_data{other_node = Node,
- other_version = Version,
- f_address =
- fun(_,_) ->
- #net_address{address = {Ip,TcpPort},
- host = Address,
- protocol = proxy,
- family = inet}
- end,
- request_type = Type
- }).
-
-accept_hs_data(Kernel, MyNode, Socket, Timer, Allowed) ->
- common_hs_data(Kernel, MyNode, Socket, Timer, #hs_data{
- allowed = Allowed,
- f_address = fun get_remote_id/2
- }).
-
-common_hs_data(Kernel, MyNode, Socket, Timer, HsData) ->
- HsData#hs_data{
- kernel_pid = Kernel,
- this_node = MyNode,
- socket = Socket,
- timer = Timer,
- this_flags = 0,
- f_send =
- fun(S,D) ->
- gen_tcp:send(S,D)
- end,
- f_recv =
- fun(S,N,T) ->
- gen_tcp:recv(S,N,T)
- end,
- f_setopts_pre_nodeup =
- fun(S) ->
- inet:setopts(S, [{active, false}, {packet, 4}])
- end,
- f_setopts_post_nodeup =
- fun(S) ->
- inet:setopts(S, [{deliver, port},{active, true}])
- end,
- f_getll =
- fun(S) ->
- inet:getll(S)
- end,
- mf_tick =
- fun(S) ->
- gen_tcp:send(S, <<>>)
- end,
- mf_getstat =
- fun(S) ->
- {ok, Stats} = inet:getstat(S, [recv_cnt, send_cnt, send_pend]),
- R = proplists:get_value(recv_cnt, Stats, 0),
- W = proplists:get_value(send_cnt, Stats, 0),
- P = proplists:get_value(send_pend, Stats, 0),
- {ok, R,W,P}
- end}.
-
-get_remote_id(Socket, _Node) ->
- case ssl_tls_dist_proxy:get_tcp_address(Socket) of
- {ok, Address} ->
- Address;
- {error, _Reason} ->
- ?shutdown(no_node)
+%% -------------------------------------------------------------------------
+
+connect_options(Opts) ->
+ case application:get_env(kernel, inet_dist_connect_options) of
+ {ok,ConnectOpts} ->
+ lists:ukeysort(1, ConnectOpts ++ Opts);
+ _ ->
+ Opts
end.
+
+%% we may not always want the nodelay behaviour
+%% for performance reasons
+nodelay() ->
+ case application:get_env(kernel, dist_nodelay) of
+ undefined ->
+ {nodelay, true};
+ {ok, true} ->
+ {nodelay, true};
+ {ok, false} ->
+ {nodelay, false};
+ _ ->
+ {nodelay, true}
+ end.
+
+
+get_ssl_options(Type) ->
+ case init:get_argument(ssl_dist_opt) of
+ {ok, Args} ->
+ [{erl_dist, true} | ssl_options(Type, lists:append(Args))];
+ _ ->
+ [{erl_dist, true}]
+ end.
+
+ssl_options(_,[]) ->
+ [];
+ssl_options(server, ["client_" ++ _, _Value |T]) ->
+ ssl_options(server,T);
+ssl_options(client, ["server_" ++ _, _Value|T]) ->
+ ssl_options(client,T);
+ssl_options(server, ["server_certfile", Value|T]) ->
+ [{certfile, Value} | ssl_options(server,T)];
+ssl_options(client, ["client_certfile", Value | T]) ->
+ [{certfile, Value} | ssl_options(client,T)];
+ssl_options(server, ["server_cacertfile", Value|T]) ->
+ [{cacertfile, Value} | ssl_options(server,T)];
+ssl_options(client, ["client_cacertfile", Value|T]) ->
+ [{cacertfile, Value} | ssl_options(client,T)];
+ssl_options(server, ["server_keyfile", Value|T]) ->
+ [{keyfile, Value} | ssl_options(server,T)];
+ssl_options(client, ["client_keyfile", Value|T]) ->
+ [{keyfile, Value} | ssl_options(client,T)];
+ssl_options(server, ["server_password", Value|T]) ->
+ [{password, Value} | ssl_options(server,T)];
+ssl_options(client, ["client_password", Value|T]) ->
+ [{password, Value} | ssl_options(client,T)];
+ssl_options(server, ["server_verify", Value|T]) ->
+ [{verify, atomize(Value)} | ssl_options(server,T)];
+ssl_options(client, ["client_verify", Value|T]) ->
+ [{verify, atomize(Value)} | ssl_options(client,T)];
+ssl_options(server, ["server_verify_fun", Value|T]) ->
+ [{verify_fun, verify_fun(Value)} | ssl_options(server,T)];
+ssl_options(client, ["client_verify_fun", Value|T]) ->
+ [{verify_fun, verify_fun(Value)} | ssl_options(client,T)];
+ssl_options(server, ["server_crl_check", Value|T]) ->
+ [{crl_check, atomize(Value)} | ssl_options(server,T)];
+ssl_options(client, ["client_crl_check", Value|T]) ->
+ [{crl_check, atomize(Value)} | ssl_options(client,T)];
+ssl_options(server, ["server_crl_cache", Value|T]) ->
+ [{crl_cache, termify(Value)} | ssl_options(server,T)];
+ssl_options(client, ["client_crl_cache", Value|T]) ->
+ [{crl_cache, termify(Value)} | ssl_options(client,T)];
+ssl_options(server, ["server_reuse_sessions", Value|T]) ->
+ [{reuse_sessions, atomize(Value)} | ssl_options(server,T)];
+ssl_options(client, ["client_reuse_sessions", Value|T]) ->
+ [{reuse_sessions, atomize(Value)} | ssl_options(client,T)];
+ssl_options(server, ["server_secure_renegotiate", Value|T]) ->
+ [{secure_renegotiate, atomize(Value)} | ssl_options(server,T)];
+ssl_options(client, ["client_secure_renegotiate", Value|T]) ->
+ [{secure_renegotiate, atomize(Value)} | ssl_options(client,T)];
+ssl_options(server, ["server_depth", Value|T]) ->
+ [{depth, list_to_integer(Value)} | ssl_options(server,T)];
+ssl_options(client, ["client_depth", Value|T]) ->
+ [{depth, list_to_integer(Value)} | ssl_options(client,T)];
+ssl_options(server, ["server_hibernate_after", Value|T]) ->
+ [{hibernate_after, list_to_integer(Value)} | ssl_options(server,T)];
+ssl_options(client, ["client_hibernate_after", Value|T]) ->
+ [{hibernate_after, list_to_integer(Value)} | ssl_options(client,T)];
+ssl_options(server, ["server_ciphers", Value|T]) ->
+ [{ciphers, Value} | ssl_options(server,T)];
+ssl_options(client, ["client_ciphers", Value|T]) ->
+ [{ciphers, Value} | ssl_options(client,T)];
+ssl_options(server, ["server_dhfile", Value|T]) ->
+ [{dhfile, Value} | ssl_options(server,T)];
+ssl_options(server, ["server_fail_if_no_peer_cert", Value|T]) ->
+ [{fail_if_no_peer_cert, atomize(Value)} | ssl_options(server,T)];
+ssl_options(Type, Opts) ->
+ error(malformed_ssl_dist_opt, [Type, Opts]).
+
+atomize(List) when is_list(List) ->
+ list_to_atom(List);
+atomize(Atom) when is_atom(Atom) ->
+ Atom.
+
+termify(String) when is_list(String) ->
+ {ok, Tokens, _} = erl_scan:string(String ++ "."),
+ {ok, Term} = erl_parse:parse_term(Tokens),
+ Term.
+
+verify_fun(Value) ->
+ case termify(Value) of
+ {Mod, Func, State} when is_atom(Mod), is_atom(Func) ->
+ Fun = fun Mod:Func/3,
+ {Fun, State};
+ _ ->
+ error(malformed_ssl_dist_opt, [Value])
+ end.
+
+%% -------------------------------------------------------------------------
+
+%% Trace point
+trace(Term) -> Term.
+
+%% Keep an eye on distribution Pid:s we know of
+monitor_pid(Pid) ->
+ %%spawn(
+ %% fun () ->
+ %% MRef = erlang:monitor(process, Pid),
+ %% receive
+ %% {'DOWN', MRef, _, _, normal} ->
+ %% error_logger:error_report(
+ %% [dist_proc_died,
+ %% {reason, normal},
+ %% {pid, Pid}]);
+ %% {'DOWN', MRef, _, _, Reason} ->
+ %% error_logger:info_report(
+ %% [dist_proc_died,
+ %% {reason, Reason},
+ %% {pid, Pid}])
+ %% end
+ %% end),
+ Pid.
+
+dbg() ->
+ dbg:stop(),
+ dbg:tracer(),
+ dbg:p(all, c),
+ dbg:tpl(?MODULE, cx),
+ dbg:tpl(erlang, dist_ctrl_get_data_notification, cx),
+ dbg:tpl(erlang, dist_ctrl_get_data, cx),
+ dbg:tpl(erlang, dist_ctrl_put_data, cx),
+ ok.
diff --git a/lib/ssl/src/ssl.app.src b/lib/ssl/src/ssl.app.src
index 51407ef3b9..c5b55641a1 100644
--- a/lib/ssl/src/ssl.app.src
+++ b/lib/ssl/src/ssl.app.src
@@ -37,7 +37,6 @@
%% Erlang Distribution over SSL/TLS
inet_tls_dist,
inet6_tls_dist,
- ssl_tls_dist_proxy,
ssl_dist_sup,
ssl_dist_connection_sup,
ssl_dist_admin_sup,
@@ -63,7 +62,5 @@
{applications, [crypto, public_key, kernel, stdlib]},
{env, []},
{mod, {ssl_app, []}},
- {runtime_dependencies, ["stdlib-3.2","public_key-1.5","kernel-3.0",
- "erts-7.0","crypto-3.3", "inets-5.10.7"]}]}.
-
-
+ {runtime_dependencies, ["stdlib-3.2","public_key-1.5","kernel-6.0",
+ "erts-10.0","crypto-3.3", "inets-5.10.7"]}]}.
diff --git a/lib/ssl/src/ssl_connection.erl b/lib/ssl/src/ssl_connection.erl
index 5d48325719..dd62ccddcd 100644
--- a/lib/ssl/src/ssl_connection.erl
+++ b/lib/ssl/src/ssl_connection.erl
@@ -44,12 +44,14 @@
-export([send/2, recv/3, close/2, shutdown/2,
new_user/2, get_opts/2, set_opts/2,
peer_certificate/1, renegotiation/1, negotiated_protocol/1, prf/5,
+ get_sslsocket/1, handshake_complete/3,
connection_information/2, handle_common_event/5
]).
%% General gen_statem state functions with extra callback argument
%% to determine if it is an SSL/TLS or DTLS gen_statem machine
--export([init/4, hello/4, abbreviated/4, certify/4, cipher/4, connection/4, downgrade/4]).
+-export([init/4, hello/4, abbreviated/4, certify/4, cipher/4,
+ connection/4, death_row/4, downgrade/4]).
%% gen_statem callbacks
-export([terminate/3, format_status/2]).
@@ -262,6 +264,13 @@ peer_certificate(ConnectionPid) ->
renegotiation(ConnectionPid) ->
call(ConnectionPid, renegotiate).
+
+get_sslsocket(ConnectionPid) ->
+ call(ConnectionPid, get_sslsocket).
+
+handshake_complete(ConnectionPid, Node, DHandle) ->
+ call(ConnectionPid, {handshake_complete, Node, DHandle}).
+
%%--------------------------------------------------------------------
-spec prf(pid(), binary() | 'master_secret', binary(),
[binary() | ssl:prf_random()], non_neg_integer()) ->
@@ -359,6 +368,12 @@ init({call, From}, {start, {Opts, EmOpts}, Timeout},
socket_options = SockOpts} = State0, Connection) ->
try
SslOpts = ssl:handle_options(Opts, OrigSSLOptions),
+ case SslOpts of
+ #ssl_options{erl_dist = true} ->
+ process_flag(priority, max);
+ _ ->
+ ok
+ end,
State = ssl_config(SslOpts, Role, State0),
init({call, From}, {start, Timeout},
State#state{ssl_options = SslOpts, socket_options = new_emulated(EmOpts, SockOpts)}, Connection)
@@ -748,7 +763,7 @@ cipher(Type, Msg, State, Connection) ->
#state{}, tls_connection | dtls_connection) ->
gen_statem:state_function_result().
%%--------------------------------------------------------------------
-connection({call, From}, {application_data, Data},
+connection({call, {FromPid, _} = From}, {application_data, Data},
#state{protocol_cb = Connection} = State, Connection) ->
%% We should look into having a worker process to do this to
%% parallize send and receive decoding and not block the receiver
@@ -756,7 +771,13 @@ connection({call, From}, {application_data, Data},
try
write_application_data(Data, From, State)
catch throw:Error ->
- hibernate_after(connection, State, [{reply, From, Error}])
+ case self() of
+ FromPid ->
+ {stop, {shutdown, Error}};
+ _ ->
+ hibernate_after(
+ connection, State, [{reply, From, Error}])
+ end
end;
connection({call, RecvFrom}, {recv, N, Timeout},
#state{protocol_cb = Connection, socket_options =
@@ -784,8 +805,50 @@ connection({call, From}, negotiated_protocol,
#state{negotiated_protocol = SelectedProtocol} = State, _) ->
hibernate_after(connection, State,
[{reply, From, {ok, SelectedProtocol}}]);
+connection(
+ {call, From}, {handshake_complete, _Node, DHandle},
+ #state{
+ ssl_options = #ssl_options{erl_dist = true},
+ socket_options = SockOpts,
+ protocol_specific = ProtocolSpecific} = State,
+ Connection) ->
+ %% From now on we execute on normal priority
+ process_flag(priority, normal),
+ try erlang:dist_ctrl_get_data_notification(DHandle) of
+ _ ->
+ NewState =
+ State#state{
+ socket_options =
+ SockOpts#socket_options{active = true},
+ protocol_specific =
+ ProtocolSpecific#{d_handle => DHandle}},
+ {Record, NewerState} = Connection:next_record_if_active(NewState),
+ Connection:next_event(connection, Record, NewerState, [{reply, From, ok}])
+ catch _:Reason ->
+ death_row(State, Reason)
+ end;
connection({call, From}, Msg, State, Connection) ->
handle_call(Msg, From, connection, State, Connection);
+connection(
+ info, dist_data = Msg,
+ #state{
+ ssl_options = #ssl_options{erl_dist = true},
+ protocol_specific = #{d_handle := DHandle}} = State,
+ _) ->
+ eat_msgs(Msg),
+ try send_dist_data(connection, State, DHandle, [])
+ catch _:Reason ->
+ death_row(State, Reason)
+ end;
+connection(
+ info, tick = Msg,
+ #state{
+ ssl_options = #ssl_options{erl_dist = true},
+ protocol_specific = #{d_handle := _}},
+ _) ->
+ eat_msgs(Msg),
+ {keep_state_and_data,
+ [{next_event, {call, {self(), undefined}}, {application_data, <<>>}}]};
connection(info, Msg, State, _) ->
handle_info(Msg, connection, State);
connection(internal, {recv, _}, State, Connection) ->
@@ -794,6 +857,30 @@ connection(Type, Msg, State, Connection) ->
handle_common_event(Type, Msg, connection, State, Connection).
%%--------------------------------------------------------------------
+-spec death_row(gen_statem:event_type(), term(),
+ #state{}, tls_connection | dtls_connection) ->
+ gen_statem:state_function_result().
+%%--------------------------------------------------------------------
+%% We just wait for the owner to die which triggers the monitor,
+%% or the socket may die too
+death_row(
+ info, {'DOWN', MonitorRef, _, _, Reason},
+ #state{user_application={MonitorRef,_Pid} = State},
+ _) ->
+ {stop, {shutdown, Reason}, State};
+death_row(
+ info, {'EXIT', Socket, Reason}, #state{socket = Socket} = State, _) ->
+ {stop, {shutdown, Reason}, State};
+death_row(state_timeout, Reason, _State, _Connection) ->
+ {stop, {shutdown,Reason}};
+death_row(_Type, _Msg, State, _Connection) ->
+ {keep_state, State, [postpone]}.
+
+%% State entry function
+death_row(State, Reason) ->
+ {next_state, death_row, State, [{state_timeout, 5000, Reason}]}.
+
+%%--------------------------------------------------------------------
-spec downgrade(gen_statem:event_type(), term(),
#state{}, tls_connection | dtls_connection) ->
gen_statem:state_function_result().
@@ -804,10 +891,10 @@ downgrade(internal, #alert{description = ?CLOSE_NOTIFY},
tls_socket:setopts(Transport, Socket, [{active, false}, {packet, 0}, {mode, binary}]),
Transport:controlling_process(Socket, Pid),
gen_statem:reply(From, {ok, Socket}),
- {stop, normal, State};
+ stop_normal(State);
downgrade(timeout, downgrade, #state{downgrade = {_, From}} = State, _) ->
gen_statem:reply(From, {error, timeout}),
- {stop, normal, State};
+ stop_normal(State);
downgrade(Type, Event, State, Connection) ->
handle_common_event(Type, Event, downgrade, State, Connection).
@@ -877,7 +964,7 @@ handle_call({shutdown, How0}, From, _,
#state{transport_cb = Transport,
negotiated_version = Version,
connection_states = ConnectionStates,
- socket = Socket}, Connection) ->
+ socket = Socket} = State, Connection) ->
case How0 of
How when How == write; How == both ->
Alert = ?ALERT_REC(?WARNING, ?CLOSE_NOTIFY),
@@ -893,7 +980,7 @@ handle_call({shutdown, How0}, From, _,
{keep_state_and_data, [{reply, From, ok}]};
Error ->
gen_statem:reply(From, {error, Error}),
- {stop, normal}
+ stop_normal(State)
end;
handle_call({recv, _N, _Timeout}, From, _,
#state{socket_options =
@@ -928,6 +1015,15 @@ handle_call({set_opts, Opts0}, From, StateName,
handle_call(renegotiate, From, StateName, _, _) when StateName =/= connection ->
{keep_state_and_data, [{reply, From, {error, already_renegotiating}}]};
+
+handle_call(
+ get_sslsocket, From, _StateName,
+ #state{transport_cb = Transport, socket = Socket, tracker = Tracker},
+ Connection) ->
+ SslSocket =
+ Connection:socket(self(), Transport, Socket, Connection, Tracker),
+ {keep_state_and_data, [{reply, From, SslSocket}]};
+
handle_call({prf, Secret, Label, Seed, WantedLength}, From, _,
#state{connection_states = ConnectionStates,
negotiated_version = Version}, _) ->
@@ -964,18 +1060,19 @@ handle_info({ErrorTag, Socket, econnaborted}, StateName,
tracker = Tracker} = State) when StateName =/= connection ->
alert_user(Transport, Tracker,Socket,
StartFrom, ?ALERT_REC(?FATAL, ?CLOSE_NOTIFY), Role, Connection),
- {stop, normal, State};
+ stop_normal(State);
handle_info({ErrorTag, Socket, Reason}, StateName, #state{socket = Socket,
error_tag = ErrorTag} = State) ->
Report = io_lib:format("SSL: Socket error: ~p ~n", [Reason]),
- error_logger:info_report(Report),
+ error_logger:error_report(Report),
handle_normal_shutdown(?ALERT_REC(?FATAL, ?CLOSE_NOTIFY), StateName, State),
- {stop, normal, State};
+ stop_normal(State);
-handle_info({'DOWN', MonitorRef, _, _, _}, _,
- State = #state{user_application={MonitorRef,_Pid}}) ->
- {stop, normal, State};
+handle_info(
+ {'DOWN', MonitorRef, _, _, _}, _,
+ #state{user_application={MonitorRef,_Pid}} = State) ->
+ stop_normal(State);
%%% So that terminate will be run when supervisor issues shutdown
handle_info({'EXIT', _Sup, shutdown}, _StateName, State) ->
@@ -983,6 +1080,8 @@ handle_info({'EXIT', _Sup, shutdown}, _StateName, State) ->
handle_info({'EXIT', Socket, normal}, _StateName, #state{socket = Socket} = State) ->
%% Handle as transport close"
{stop, {shutdown, transport_closed}, State};
+handle_info({'EXIT', Socket, Reason}, _StateName, #state{socket = Socket} = State) ->
+ {stop, {shutdown, Reason}, State};
handle_info(allow_renegotiate, StateName, State) ->
{next_state, StateName, State#state{allow_renegotiate = true}};
@@ -1006,6 +1105,38 @@ handle_info(Msg, StateName, #state{socket = Socket, error_tag = Tag} = State) ->
error_logger:info_report(Report),
{next_state, StateName, State}.
+
+
+send_dist_data(StateName, State, DHandle, Acc) ->
+ case erlang:dist_ctrl_get_data(DHandle) of
+ none ->
+ erlang:dist_ctrl_get_data_notification(DHandle),
+ hibernate_after(StateName, State, lists:reverse(Acc));
+ Data ->
+ send_dist_data(
+ StateName, State, DHandle,
+ [{next_event, {call, {self(), undefined}}, {application_data, Data}}
+ |Acc])
+ end.
+
+%% Overload mitigation
+eat_msgs(Msg) ->
+ receive Msg -> eat_msgs(Msg)
+ after 0 -> ok
+ end.
+
+%% When running with erl_dist the stop reason 'normal'
+%% would be too silent and prevent cleanup
+stop_normal(State) ->
+ Reason =
+ case State of
+ #state{ssl_options = #ssl_options{erl_dist = true}} ->
+ {shutdown, normal};
+ _ ->
+ normal
+ end,
+ {stop, Reason, State}.
+
%%--------------------------------------------------------------------
%% gen_statem callbacks
%%--------------------------------------------------------------------
@@ -1080,7 +1211,7 @@ format_status(terminate, [_, StateName, State]) ->
%%--------------------------------------------------------------------
%%%
%%--------------------------------------------------------------------
-write_application_data(Data0, From,
+write_application_data(Data0, {FromPid, _} = From,
#state{socket = Socket,
negotiated_version = Version,
protocol_cb = Connection,
@@ -1095,10 +1226,19 @@ write_application_data(Data0, From,
Connection:renegotiate(State#state{renegotiation = {true, internal}},
[{next_event, {call, From}, {application_data, Data0}}]);
false ->
- {Msgs, ConnectionStates} = Connection:encode_data(Data, Version, ConnectionStates0),
- Result = Connection:send(Transport, Socket, Msgs),
- ssl_connection:hibernate_after(connection, State#state{connection_states = ConnectionStates},
- [{reply, From, Result}])
+ {Msgs, ConnectionStates} =
+ Connection:encode_data(Data, Version, ConnectionStates0),
+ NewState = State#state{connection_states = ConnectionStates},
+ case Connection:send(Transport, Socket, Msgs) of
+ ok when FromPid =:= self() ->
+ hibernate_after(connection, NewState, []);
+ Error when FromPid =:= self() ->
+ {stop, {shutdown, Error}, NewState};
+ ok ->
+ hibernate_after(connection, NewState, [{reply, From, ok}]);
+ Result ->
+ hibernate_after(connection, NewState, [{reply, From, Result}])
+ end
end.
read_application_data(Data, #state{user_application = {_Mon, Pid},
@@ -1118,30 +1258,57 @@ read_application_data(Data, #state{user_application = {_Mon, Pid},
end,
case get_data(SOpts, BytesToRead, Buffer1) of
{ok, ClientData, Buffer} -> % Send data
- SocketOpt = deliver_app_data(Transport, Socket, SOpts,
- ClientData, Pid, RecvFrom, Tracker, Connection),
- cancel_timer(Timer),
- State = State0#state{user_data_buffer = Buffer,
- start_or_recv_from = undefined,
- timer = undefined,
- bytes_to_read = undefined,
- socket_options = SocketOpt
- },
- if
- SocketOpt#socket_options.active =:= false; Buffer =:= <<>> ->
- %% Passive mode, wait for active once or recv
- %% Active and empty, get more data
- Connection:next_record_if_active(State);
- true -> %% We have more data
- read_application_data(<<>>, State)
- end;
+ case State0 of
+ #state{
+ ssl_options = #ssl_options{erl_dist = true},
+ protocol_specific = #{d_handle := DHandle}} ->
+ State =
+ State0#state{
+ user_data_buffer = Buffer,
+ bytes_to_read = undefined},
+ try erlang:dist_ctrl_put_data(DHandle, ClientData) of
+ _
+ when SOpts#socket_options.active =:= false;
+ Buffer =:= <<>> ->
+ %% Passive mode, wait for active once or recv
+ %% Active and empty, get more data
+ Connection:next_record_if_active(State);
+ _ -> %% We have more data
+ read_application_data(<<>>, State)
+ catch _:Reason ->
+ death_row(State, Reason)
+ end;
+ _ ->
+ SocketOpt =
+ deliver_app_data(
+ Transport, Socket, SOpts,
+ ClientData, Pid, RecvFrom, Tracker, Connection),
+ cancel_timer(Timer),
+ State =
+ State0#state{
+ user_data_buffer = Buffer,
+ start_or_recv_from = undefined,
+ timer = undefined,
+ bytes_to_read = undefined,
+ socket_options = SocketOpt
+ },
+ if
+ SocketOpt#socket_options.active =:= false;
+ Buffer =:= <<>> ->
+ %% Passive mode, wait for active once or recv
+ %% Active and empty, get more data
+ Connection:next_record_if_active(State);
+ true -> %% We have more data
+ read_application_data(<<>>, State)
+ end
+ end;
{more, Buffer} -> % no reply, we need more data
Connection:next_record(State0#state{user_data_buffer = Buffer});
{passive, Buffer} ->
Connection:next_record_if_active(State0#state{user_data_buffer = Buffer});
{error,_Reason} -> %% Invalid packet in packet mode
deliver_packet_error(Transport, Socket, SOpts, Buffer1, Pid, RecvFrom, Tracker, Connection),
- {stop, normal, State0}
+ stop_normal(State0)
end.
%%--------------------------------------------------------------------
%%%
@@ -1151,12 +1318,12 @@ handle_alert(#alert{level = ?FATAL} = Alert, StateName,
protocol_cb = Connection,
ssl_options = SslOpts, start_or_recv_from = From, host = Host,
port = Port, session = Session, user_application = {_Mon, Pid},
- role = Role, socket_options = Opts, tracker = Tracker}) ->
+ role = Role, socket_options = Opts, tracker = Tracker} = State) ->
invalidate_session(Role, Host, Port, Session),
log_alert(SslOpts#ssl_options.log_alert, Role, Connection:protocol_name(),
StateName, Alert#alert{role = opposite_role(Role)}),
alert_user(Transport, Tracker, Socket, StateName, Opts, Pid, From, Alert, Role, Connection),
- {stop, normal};
+ stop_normal(State);
handle_alert(#alert{level = ?WARNING, description = ?CLOSE_NOTIFY} = Alert,
StateName, State) ->
diff --git a/lib/ssl/src/ssl_dist_sup.erl b/lib/ssl/src/ssl_dist_sup.erl
index 690b896919..c241a9bced 100644
--- a/lib/ssl/src/ssl_dist_sup.erl
+++ b/lib/ssl/src/ssl_dist_sup.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2011-2016. All Rights Reserved.
+%% Copyright Ericsson AB 2011-2017. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
@@ -46,8 +46,7 @@ start_link() ->
init([]) ->
AdminSup = ssl_admin_child_spec(),
ConnectionSup = ssl_connection_sup(),
- ProxyServer = proxy_server_child_spec(),
- {ok, {{one_for_all, 10, 3600}, [AdminSup, ProxyServer, ConnectionSup]}}.
+ {ok, {{one_for_all, 10, 3600}, [AdminSup, ConnectionSup]}}.
%%--------------------------------------------------------------------
%%% Internal functions
@@ -69,12 +68,3 @@ ssl_connection_sup() ->
Modules = [ssl_connection_sup],
Type = supervisor,
{Name, StartFunc, Restart, Shutdown, Type, Modules}.
-
-proxy_server_child_spec() ->
- Name = ssl_tls_dist_proxy,
- StartFunc = {ssl_tls_dist_proxy, start_link, []},
- Restart = permanent,
- Shutdown = 4000,
- Modules = [ssl_tls_dist_proxy],
- Type = worker,
- {Name, StartFunc, Restart, Shutdown, Type, Modules}.
diff --git a/lib/ssl/src/ssl_tls_dist_proxy.erl b/lib/ssl/src/ssl_tls_dist_proxy.erl
deleted file mode 100644
index 08947f24dd..0000000000
--- a/lib/ssl/src/ssl_tls_dist_proxy.erl
+++ /dev/null
@@ -1,479 +0,0 @@
-%%
-%% %CopyrightBegin%
-%%
-%% Copyright Ericsson AB 2011-2016. All Rights Reserved.
-%%
-%% Licensed under the Apache License, Version 2.0 (the "License");
-%% you may not use this file except in compliance with the License.
-%% You may obtain a copy of the License at
-%%
-%% http://www.apache.org/licenses/LICENSE-2.0
-%%
-%% Unless required by applicable law or agreed to in writing, software
-%% distributed under the License is distributed on an "AS IS" BASIS,
-%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-%% See the License for the specific language governing permissions and
-%% limitations under the License.
-%%
-%% %CopyrightEnd%
-%%
--module(ssl_tls_dist_proxy).
-
-
--export([listen/2, accept/2, connect/3, get_tcp_address/1]).
--export([init/1, start_link/0, handle_call/3, handle_cast/2, handle_info/2,
- terminate/2, code_change/3, ssl_options/2]).
-
--include_lib("kernel/include/net_address.hrl").
-
--record(state,
- {listen,
- accept_loop
- }).
-
--define(PPRE, 4).
--define(PPOST, 4).
-
-
-%%====================================================================
-%% Internal application API
-%%====================================================================
-
-listen(Driver, Name) ->
- gen_server:call(?MODULE, {listen, Driver, Name}, infinity).
-
-accept(Driver, Listen) ->
- gen_server:call(?MODULE, {accept, Driver, Listen}, infinity).
-
-connect(Driver, Ip, Port) ->
- gen_server:call(?MODULE, {connect, Driver, Ip, Port}, infinity).
-
-
-do_listen(Options) ->
- {First,Last} = case application:get_env(kernel,inet_dist_listen_min) of
- {ok,N} when is_integer(N) ->
- case application:get_env(kernel,
- inet_dist_listen_max) of
- {ok,M} when is_integer(M) ->
- {N,M};
- _ ->
- {N,N}
- end;
- _ ->
- {0,0}
- end,
- do_listen(First, Last, listen_options([{backlog,128}|Options])).
-
-do_listen(First,Last,_) when First > Last ->
- {error,eaddrinuse};
-do_listen(First,Last,Options) ->
- case gen_tcp:listen(First, Options) of
- {error, eaddrinuse} ->
- do_listen(First+1,Last,Options);
- Other ->
- Other
- end.
-
-listen_options(Opts0) ->
- Opts1 =
- case application:get_env(kernel, inet_dist_use_interface) of
- {ok, Ip} ->
- [{ip, Ip} | Opts0];
- _ ->
- Opts0
- end,
- case application:get_env(kernel, inet_dist_listen_options) of
- {ok,ListenOpts} ->
- ListenOpts ++ Opts1;
- _ ->
- Opts1
- end.
-
-connect_options(Opts) ->
- case application:get_env(kernel, inet_dist_connect_options) of
- {ok,ConnectOpts} ->
- lists:ukeysort(1, ConnectOpts ++ Opts);
- _ ->
- Opts
- end.
-
-%%====================================================================
-%% gen_server callbacks
-%%====================================================================
-
-start_link() ->
- gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
-
-init([]) ->
- process_flag(priority, max),
- {ok, #state{}}.
-
-handle_call({listen, Driver, Name}, _From, State) ->
- case gen_tcp:listen(0, [{active, false}, {packet,?PPRE}, {ip, loopback}]) of
- {ok, Socket} ->
- {ok, World} = do_listen([{active, false}, binary, {packet,?PPRE}, {reuseaddr, true},
- Driver:family()]),
- {ok, TcpAddress} = get_tcp_address(Socket),
- {ok, WorldTcpAddress} = get_tcp_address(World),
- {_,Port} = WorldTcpAddress#net_address.address,
- ErlEpmd = net_kernel:epmd_module(),
- case ErlEpmd:register_node(Name, Port, Driver) of
- {ok, Creation} ->
- {reply, {ok, {Socket, TcpAddress, Creation}},
- State#state{listen={Socket, World}}};
- {error, _} = Error ->
- {reply, Error, State}
- end;
- Error ->
- {reply, Error, State}
- end;
-
-handle_call({accept, _Driver, Listen}, {From, _}, State = #state{listen={_, World}}) ->
- Self = self(),
- ErtsPid = spawn_link(fun() -> accept_loop(Self, erts, Listen, From) end),
- WorldPid = spawn_link(fun() -> accept_loop(Self, world, World, Listen) end),
- {reply, ErtsPid, State#state{accept_loop={ErtsPid, WorldPid}}};
-
-handle_call({connect, Driver, Ip, Port}, {From, _}, State) ->
- Me = self(),
- Pid = spawn_link(fun() -> setup_proxy(Driver, Ip, Port, Me) end),
- receive
- {Pid, go_ahead, LPort} ->
- Res = {ok, Socket} = try_connect(LPort),
- case gen_tcp:controlling_process(Socket, From) of
- {error, badarg} = Error -> {reply, Error, State}; % From is dead anyway.
- ok ->
- flush_old_controller(From, Socket),
- {reply, Res, State}
- end;
- {Pid, Error} ->
- {reply, Error, State}
- end;
-
-handle_call(_What, _From, State) ->
- {reply, ok, State}.
-
-handle_cast(_What, State) ->
- {noreply, State}.
-
-handle_info(_What, State) ->
- {noreply, State}.
-
-terminate(_Reason, _St) ->
- ok.
-
-code_change(_OldVsn, St, _Extra) ->
- {ok, St}.
-
-%%--------------------------------------------------------------------
-%%% Internal functions
-%%--------------------------------------------------------------------
-get_tcp_address(Socket) ->
- case inet:sockname(Socket) of
- {ok, Address} ->
- {ok, Host} = inet:gethostname(),
- NetAddress = #net_address{
- address = Address,
- host = Host,
- protocol = proxy,
- family = inet
- },
- {ok, NetAddress};
- {error, _} = Error -> Error
- end.
-
-accept_loop(Proxy, erts = Type, Listen, Extra) ->
- process_flag(priority, max),
- case gen_tcp:accept(Listen) of
- {ok, Socket} ->
- Extra ! {accept,self(),Socket,inet,proxy},
- receive
- {_Kernel, controller, Pid} ->
- inet:setopts(Socket, [nodelay()]),
- ok = gen_tcp:controlling_process(Socket, Pid),
- flush_old_controller(Pid, Socket),
- Pid ! {self(), controller};
- {_Kernel, unsupported_protocol} ->
- exit(unsupported_protocol)
- end;
- {error, closed} ->
- %% The listening socket is closed: the proxy process is
- %% shutting down. Exit normally, to avoid generating a
- %% spurious error report.
- exit(normal);
- Error ->
- exit(Error)
- end,
- accept_loop(Proxy, Type, Listen, Extra);
-
-accept_loop(Proxy, world = Type, Listen, Extra) ->
- process_flag(priority, max),
- case gen_tcp:accept(Listen) of
- {ok, Socket} ->
- Opts = get_ssl_options(server),
- wait_for_code_server(),
- case ssl:ssl_accept(Socket, Opts) of
- {ok, SslSocket} ->
- PairHandler =
- spawn_link(fun() ->
- setup_connection(SslSocket, Extra)
- end),
- ok = ssl:controlling_process(SslSocket, PairHandler),
- flush_old_controller(PairHandler, SslSocket);
- {error, {options, _}} = Error ->
- %% Bad options: that's probably our fault. Let's log that.
- error_logger:error_msg("Cannot accept TLS distribution connection: ~s~n",
- [ssl:format_error(Error)]),
- gen_tcp:close(Socket);
- _ ->
- gen_tcp:close(Socket)
- end;
- Error ->
- exit(Error)
- end,
- accept_loop(Proxy, Type, Listen, Extra).
-
-wait_for_code_server() ->
- %% This is an ugly hack. Upgrading a socket to TLS requires the
- %% crypto module to be loaded. Loading the crypto module triggers
- %% its on_load function, which calls code:priv_dir/1 to find the
- %% directory where its NIF library is. However, distribution is
- %% started earlier than the code server, so the code server is not
- %% necessarily started yet, and code:priv_dir/1 might fail because
- %% of that, if we receive an incoming connection on the
- %% distribution port early enough.
- %%
- %% If the on_load function of a module fails, the module is
- %% unloaded, and the function call that triggered loading it fails
- %% with 'undef', which is rather confusing.
- %%
- %% Thus, the ssl_tls_dist_proxy process will terminate, and be
- %% restarted by ssl_dist_sup. However, it won't have any memory
- %% of being asked by net_kernel to listen for incoming
- %% connections. Hence, the node will believe that it's open for
- %% distribution, but it actually isn't.
- %%
- %% So let's avoid that by waiting for the code server to start.
- case whereis(code_server) of
- undefined ->
- timer:sleep(10),
- wait_for_code_server();
- Pid when is_pid(Pid) ->
- ok
- end.
-
-try_connect(Port) ->
- case gen_tcp:connect({127,0,0,1}, Port, [{active, false}, {packet,?PPRE}, nodelay()]) of
- R = {ok, _S} ->
- R;
- {error, _R} ->
- try_connect(Port)
- end.
-
-setup_proxy(Driver, Ip, Port, Parent) ->
- process_flag(trap_exit, true),
- Opts = connect_options(get_ssl_options(client)),
- case ssl:connect(Ip, Port, [{active, true}, binary, {packet,?PPRE}, nodelay(),
- Driver:family()] ++ Opts) of
- {ok, World} ->
- {ok, ErtsL} = gen_tcp:listen(0, [{active, true}, {ip, loopback}, binary, {packet,?PPRE}]),
- {ok, #net_address{address={_,LPort}}} = get_tcp_address(ErtsL),
- Parent ! {self(), go_ahead, LPort},
- case gen_tcp:accept(ErtsL) of
- {ok, Erts} ->
- %% gen_tcp:close(ErtsL),
- loop_conn_setup(World, Erts);
- Err ->
- Parent ! {self(), Err}
- end;
- {error, {options, _}} = Err ->
- %% Bad options: that's probably our fault. Let's log that.
- error_logger:error_msg("Cannot open TLS distribution connection: ~s~n",
- [ssl:format_error(Err)]),
- Parent ! {self(), Err};
- Err ->
- Parent ! {self(), Err}
- end.
-
-
-%% we may not always want the nodelay behaviour
-%% %% for performance reasons
-
-nodelay() ->
- case application:get_env(kernel, dist_nodelay) of
- undefined ->
- {nodelay, true};
- {ok, true} ->
- {nodelay, true};
- {ok, false} ->
- {nodelay, false};
- _ ->
- {nodelay, true}
- end.
-
-setup_connection(World, ErtsListen) ->
- process_flag(trap_exit, true),
- {ok, TcpAddress} = get_tcp_address(ErtsListen),
- {_Addr,Port} = TcpAddress#net_address.address,
- {ok, Erts} = gen_tcp:connect({127,0,0,1}, Port, [{active, true}, binary, {packet,?PPRE}, nodelay()]),
- ssl:setopts(World, [{active,true}, {packet,?PPRE}, nodelay()]),
- loop_conn_setup(World, Erts).
-
-loop_conn_setup(World, Erts) ->
- receive
- {ssl, World, Data = <<$a, _/binary>>} ->
- gen_tcp:send(Erts, Data),
- ssl:setopts(World, [{packet,?PPOST}, nodelay()]),
- inet:setopts(Erts, [{packet,?PPOST}, nodelay()]),
- loop_conn(World, Erts);
- {tcp, Erts, Data = <<$a, _/binary>>} ->
- ssl:send(World, Data),
- ssl:setopts(World, [{packet,?PPOST}, nodelay()]),
- inet:setopts(Erts, [{packet,?PPOST}, nodelay()]),
- loop_conn(World, Erts);
- {ssl, World, Data = <<_, _/binary>>} ->
- gen_tcp:send(Erts, Data),
- loop_conn_setup(World, Erts);
- {tcp, Erts, Data = <<_, _/binary>>} ->
- ssl:send(World, Data),
- loop_conn_setup(World, Erts);
- {ssl, World, Data} ->
- gen_tcp:send(Erts, Data),
- loop_conn_setup(World, Erts);
- {tcp, Erts, Data} ->
- ssl:send(World, Data),
- loop_conn_setup(World, Erts);
- {tcp_closed, Erts} ->
- ssl:close(World);
- {ssl_closed, World} ->
- gen_tcp:close(Erts);
- {ssl_error, World, _} ->
-
- ssl:close(World)
- end.
-
-loop_conn(World, Erts) ->
- receive
- {ssl, World, Data} ->
- gen_tcp:send(Erts, Data),
- loop_conn(World, Erts);
- {tcp, Erts, Data} ->
- ssl:send(World, Data),
- loop_conn(World, Erts);
- {tcp_closed, Erts} ->
- ssl:close(World);
- {ssl_closed, World} ->
- gen_tcp:close(Erts);
- {ssl_error, World, _} ->
- ssl:close(World)
- end.
-
-get_ssl_options(Type) ->
- case init:get_argument(ssl_dist_opt) of
- {ok, Args} ->
- [{erl_dist, true} | ssl_options(Type, lists:append(Args))];
- _ ->
- [{erl_dist, true}]
- end.
-
-ssl_options(_,[]) ->
- [];
-ssl_options(server, ["client_" ++ _, _Value |T]) ->
- ssl_options(server,T);
-ssl_options(client, ["server_" ++ _, _Value|T]) ->
- ssl_options(client,T);
-ssl_options(server, ["server_certfile", Value|T]) ->
- [{certfile, Value} | ssl_options(server,T)];
-ssl_options(client, ["client_certfile", Value | T]) ->
- [{certfile, Value} | ssl_options(client,T)];
-ssl_options(server, ["server_cacertfile", Value|T]) ->
- [{cacertfile, Value} | ssl_options(server,T)];
-ssl_options(client, ["client_cacertfile", Value|T]) ->
- [{cacertfile, Value} | ssl_options(client,T)];
-ssl_options(server, ["server_keyfile", Value|T]) ->
- [{keyfile, Value} | ssl_options(server,T)];
-ssl_options(client, ["client_keyfile", Value|T]) ->
- [{keyfile, Value} | ssl_options(client,T)];
-ssl_options(server, ["server_password", Value|T]) ->
- [{password, Value} | ssl_options(server,T)];
-ssl_options(client, ["client_password", Value|T]) ->
- [{password, Value} | ssl_options(client,T)];
-ssl_options(server, ["server_verify", Value|T]) ->
- [{verify, atomize(Value)} | ssl_options(server,T)];
-ssl_options(client, ["client_verify", Value|T]) ->
- [{verify, atomize(Value)} | ssl_options(client,T)];
-ssl_options(server, ["server_verify_fun", Value|T]) ->
- [{verify_fun, verify_fun(Value)} | ssl_options(server,T)];
-ssl_options(client, ["client_verify_fun", Value|T]) ->
- [{verify_fun, verify_fun(Value)} | ssl_options(client,T)];
-ssl_options(server, ["server_crl_check", Value|T]) ->
- [{crl_check, atomize(Value)} | ssl_options(server,T)];
-ssl_options(client, ["client_crl_check", Value|T]) ->
- [{crl_check, atomize(Value)} | ssl_options(client,T)];
-ssl_options(server, ["server_crl_cache", Value|T]) ->
- [{crl_cache, termify(Value)} | ssl_options(server,T)];
-ssl_options(client, ["client_crl_cache", Value|T]) ->
- [{crl_cache, termify(Value)} | ssl_options(client,T)];
-ssl_options(server, ["server_reuse_sessions", Value|T]) ->
- [{reuse_sessions, atomize(Value)} | ssl_options(server,T)];
-ssl_options(client, ["client_reuse_sessions", Value|T]) ->
- [{reuse_sessions, atomize(Value)} | ssl_options(client,T)];
-ssl_options(server, ["server_secure_renegotiate", Value|T]) ->
- [{secure_renegotiate, atomize(Value)} | ssl_options(server,T)];
-ssl_options(client, ["client_secure_renegotiate", Value|T]) ->
- [{secure_renegotiate, atomize(Value)} | ssl_options(client,T)];
-ssl_options(server, ["server_depth", Value|T]) ->
- [{depth, list_to_integer(Value)} | ssl_options(server,T)];
-ssl_options(client, ["client_depth", Value|T]) ->
- [{depth, list_to_integer(Value)} | ssl_options(client,T)];
-ssl_options(server, ["server_hibernate_after", Value|T]) ->
- [{hibernate_after, list_to_integer(Value)} | ssl_options(server,T)];
-ssl_options(client, ["client_hibernate_after", Value|T]) ->
- [{hibernate_after, list_to_integer(Value)} | ssl_options(client,T)];
-ssl_options(server, ["server_ciphers", Value|T]) ->
- [{ciphers, Value} | ssl_options(server,T)];
-ssl_options(client, ["client_ciphers", Value|T]) ->
- [{ciphers, Value} | ssl_options(client,T)];
-ssl_options(server, ["server_dhfile", Value|T]) ->
- [{dhfile, Value} | ssl_options(server,T)];
-ssl_options(server, ["server_fail_if_no_peer_cert", Value|T]) ->
- [{fail_if_no_peer_cert, atomize(Value)} | ssl_options(server,T)];
-ssl_options(Type, Opts) ->
- error(malformed_ssl_dist_opt, [Type, Opts]).
-
-atomize(List) when is_list(List) ->
- list_to_atom(List);
-atomize(Atom) when is_atom(Atom) ->
- Atom.
-
-termify(String) when is_list(String) ->
- {ok, Tokens, _} = erl_scan:string(String ++ "."),
- {ok, Term} = erl_parse:parse_term(Tokens),
- Term.
-
-verify_fun(Value) ->
- case termify(Value) of
- {Mod, Func, State} when is_atom(Mod), is_atom(Func) ->
- Fun = fun Mod:Func/3,
- {Fun, State};
- _ ->
- error(malformed_ssl_dist_opt, [Value])
- end.
-
-flush_old_controller(Pid, Socket) ->
- receive
- {tcp, Socket, Data} ->
- Pid ! {tcp, Socket, Data},
- flush_old_controller(Pid, Socket);
- {tcp_closed, Socket} ->
- Pid ! {tcp_closed, Socket},
- flush_old_controller(Pid, Socket);
- {ssl, Socket, Data} ->
- Pid ! {ssl, Socket, Data},
- flush_old_controller(Pid, Socket);
- {ssl_closed, Socket} ->
- Pid ! {ssl_closed, Socket},
- flush_old_controller(Pid, Socket)
- after 0 ->
- ok
- end.
diff --git a/lib/ssl/src/tls_connection.erl b/lib/ssl/src/tls_connection.erl
index e3ffbea3d3..16b30a92c6 100644
--- a/lib/ssl/src/tls_connection.erl
+++ b/lib/ssl/src/tls_connection.erl
@@ -65,7 +65,7 @@
%% gen_statem state functions
-export([init/3, error/3, downgrade/3, %% Initiation and take down states
hello/3, certify/3, cipher/3, abbreviated/3, %% Handshake states
- connection/3]).
+ connection/3, death_row/3]).
%% gen_statem callbacks
-export([callback_mode/0, terminate/3, code_change/4, format_status/2]).
@@ -378,6 +378,13 @@ connection(Type, Event, State) ->
ssl_connection:connection(Type, Event, State, ?MODULE).
%%--------------------------------------------------------------------
+-spec death_row(gen_statem:event_type(), term(), #state{}) ->
+ gen_statem:state_function_result().
+%%--------------------------------------------------------------------
+death_row(Type, Event, State) ->
+ ssl_connection:death_row(Type, Event, State, ?MODULE).
+
+%%--------------------------------------------------------------------
-spec downgrade(gen_statem:event_type(), term(), #state{}) ->
gen_statem:state_function_result().
%%--------------------------------------------------------------------
@@ -434,7 +441,7 @@ handle_info({CloseTag, Socket}, StateName,
next_event(StateName, no_record, State)
end;
handle_info(Msg, StateName, State) ->
- ssl_connection:handle_info(Msg, StateName, State).
+ ssl_connection:StateName(info, Msg, State, ?MODULE).
handle_common_event(internal, #alert{} = Alert, StateName,
#state{negotiated_version = Version} = State) ->