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-rw-r--r--lib/ssl/proxy_server.erl218
1 files changed, 218 insertions, 0 deletions
diff --git a/lib/ssl/proxy_server.erl b/lib/ssl/proxy_server.erl
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+++ b/lib/ssl/proxy_server.erl
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+%%%-------------------------------------------------------------------
+%%% @author Dan Gudmundsson <[email protected]>
+%%% @copyright (C) 2010, Dan Gudmundsson
+%%% @doc start server with -proto_dist inet_proxy and net_kernel:start([s@faenor, shortnames]).
+%%%
+%%% @end
+%%% Created : 22 Jun 2010 by Dan Gudmundsson <[email protected]>
+%%%-------------------------------------------------------------------
+-module(proxy_server).
+
+-export([init/1, start_link/0, handle_call/3, handle_cast/2, handle_info/2,
+ terminate/2, code_change/3]).
+
+-include_lib("kernel/src/net_address.hrl").
+-include_lib("kernel/src/dist.hrl").
+-include_lib("kernel/src/dist_util.hrl").
+
+-record(state,
+ {listen,
+ accept_loop
+ }).
+
+start_link() ->
+ gen_server:start_link({local, proxy_server}, proxy_server, [], []).
+
+init([]) ->
+ io:format("~p: init~n",[self()]),
+ process_flag(priority, max),
+ {ok, #state{}}.
+
+handle_call(What = {listen, Name}, _From, State) ->
+ io:format("~p: call listen ~p~n",[self(), What]),
+ case gen_tcp:listen(0, [{active, false}, {packet,2}]) of
+ {ok, Socket} ->
+ {ok, World} = gen_tcp:listen(0, [{active, false}, binary, {packet,2}]),
+ TcpAddress = get_tcp_address(Socket),
+ WorldTcpAddress = get_tcp_address(World),
+ {_,Port} = WorldTcpAddress#net_address.address,
+ {ok, Creation} = erl_epmd:register_node(Name, Port),
+ {reply, {ok, {Socket, TcpAddress, Creation}},
+ State#state{listen={Socket, World}}};
+ Error ->
+ {reply, Error, State}
+ end;
+
+handle_call(What = {accept, Listen}, {From, _}, State = #state{listen={_, World}}) ->
+ io:format("~p: call accept ~p~n",[self(), What]),
+ 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, Ip, Port}, {From, _}, State) ->
+ Me = self(),
+ Pid = spawn_link(fun() -> setup_proxy(Ip, Port, Me) end),
+ receive
+ {Pid, go_ahead, LPort} ->
+ Res = {ok, Socket} = try_connect(LPort),
+ ok = gen_tcp:controlling_process(Socket, From),
+ {reply, Res, State};
+ {Pid, Error} ->
+ {reply, Error, State}
+ end;
+
+handle_call({get_remote_id, {Socket,_Node}}, _From, State) ->
+ Address = get_tcp_address(Socket),
+ io:format("~p: get_remote_id ~p~n",[self(), Address]),
+ {reply, Address, State};
+
+handle_call(What, _From, State) ->
+ io:format("~p: call ~p~n",[self(), What]),
+ {reply, ok, State}.
+
+handle_cast(What, State) ->
+ io:format("~p: cast ~p~n",[self(), What]),
+ {noreply, State}.
+
+handle_info(What, State) ->
+ io:format("~p: info ~p~n",[self(), What]),
+ {noreply, State}.
+
+terminate(_Reason, _St) ->
+ ok.
+
+code_change(_OldVsn, St, _Extra) ->
+ {ok, St}.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+get_tcp_address(Socket) ->
+ {ok, Address} = inet:sockname(Socket),
+ {ok, Host} = inet:gethostname(),
+ #net_address{
+ address = Address,
+ host = Host,
+ protocol = proxy,
+ family = inet
+ }.
+
+accept_loop(Proxy, Type, Listen, Extra) ->
+ process_flag(priority, max),
+ case gen_tcp:accept(Listen) of
+ {ok, Socket} ->
+ case Type of
+ erts ->
+ io:format("~p: erts accept~n",[self()]),
+ Extra ! {accept,self(),Socket,inet,proxy},
+ receive
+ {_Kernel, controller, Pid} ->
+ ok = gen_tcp:controlling_process(Socket, Pid),
+ Pid ! {self(), controller};
+ {_Kernel, unsupported_protocol} ->
+ exit(unsupported_protocol)
+ end;
+ _ ->
+ io:format("~p: world accept~n",[self()]),
+ PairHandler = spawn(fun() -> setup_connection(Socket, Extra) end),
+ ok = gen_tcp:controlling_process(Socket, PairHandler)
+ end,
+ accept_loop(Proxy, Type, Listen, Extra);
+ Error ->
+ exit(Error)
+ end.
+
+
+try_connect(Port) ->
+ case gen_tcp:connect({127,0,0,1}, Port, [{active, false}, {packet,2}]) of
+ R = {ok, _S} ->
+ R;
+ {error, _R} ->
+ io:format("Failed ~p~n",[_R]),
+ try_connect(Port)
+ end.
+
+setup_proxy(Ip, Port, Parent) ->
+ case gen_tcp:connect(Ip, Port, [{active, true}, binary, {packet,2}]) of
+ {ok, World} ->
+ {ok, ErtsL} = gen_tcp:listen(0, [{active, true}, binary, {packet,2}]),
+ #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),
+ io:format("World ~p Erts ~p~n",[World, Erts]),
+ loop_conn_setup(World, Erts);
+ Err ->
+ Parent ! {self(), Err}
+ end;
+ Err ->
+ Parent ! {self(), Err}
+ end.
+
+setup_connection(World, ErtsListen) ->
+ io:format("Setup connection ~n",[]),
+ 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,2}]),
+ inet:setopts(World, [{active,true}, {packet, 2}]),
+ io:format("~p ~n",[?LINE]),
+ loop_conn_setup(World, Erts).
+
+loop_conn_setup(World, Erts) ->
+ receive
+ {tcp, World, Data = <<a, _/binary>>} ->
+ gen_tcp:send(Erts, Data),
+ io:format("Handshake finished World -> Erts ~p ~c~n",[size(Data), a]),
+ inet:setopts(World, [{packet, 4}]),
+ inet:setopts(Erts, [{packet, 4}]),
+ loop_conn(World, Erts);
+ {tcp, Erts, Data = <<a, _/binary>>} ->
+ gen_tcp:send(World, Data),
+ io:format("Handshake finished Erts -> World ~p ~c~n",[size(Data), a]),
+ inet:setopts(World, [{packet, 4}]),
+ inet:setopts(Erts, [{packet, 4}]),
+ loop_conn(World, Erts);
+
+ {tcp, World, Data = <<H, _/binary>>} ->
+ gen_tcp:send(Erts, Data),
+ io:format("Handshake World -> Erts ~p ~c~n",[size(Data), H]),
+ loop_conn_setup(World, Erts);
+ {tcp, Erts, Data = <<H, _/binary>>} ->
+ gen_tcp:send(World, Data),
+ io:format("Handshake Erts -> World ~p ~c~n",[size(Data), H]),
+ loop_conn_setup(World, Erts);
+ {tcp, World, Data} ->
+ gen_tcp:send(Erts, Data),
+ io:format("World -> Erts ~p <<>>~n",[size(Data)]),
+ loop_conn(World, Erts);
+ {tcp, Erts, Data} ->
+ gen_tcp:send(World, Data),
+ io:format("Erts -> World ~p <<>>~n",[size(Data)]),
+ loop_conn(World, Erts);
+ Other ->
+ io:format("~p ~p~n",[?LINE, Other])
+ end.
+
+
+loop_conn(World, Erts) ->
+ receive
+ {tcp, World, Data = <<H, _/binary>>} ->
+ gen_tcp:send(Erts, Data),
+ io:format("World -> Erts ~p ~c~n",[size(Data), H]),
+ loop_conn(World, Erts);
+ {tcp, Erts, Data = <<H, _/binary>>} ->
+ gen_tcp:send(World, Data),
+ io:format("Erts -> World ~p ~c~n",[size(Data), H]),
+ loop_conn(World, Erts);
+ {tcp, World, Data} ->
+ gen_tcp:send(Erts, Data),
+ io:format("World -> Erts ~p <<>>~n",[size(Data)]),
+ loop_conn(World, Erts);
+ {tcp, Erts, Data} ->
+ gen_tcp:send(World, Data),
+ io:format("Erts -> World ~p <<>>~n",[size(Data)]),
+ loop_conn(World, Erts);
+
+ Other ->
+ io:format("~p ~p~n",[?LINE, Other])
+ end.
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