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-rw-r--r--lib/ssh/src/ssh_connection.erl216
1 files changed, 128 insertions, 88 deletions
diff --git a/lib/ssh/src/ssh_connection.erl b/lib/ssh/src/ssh_connection.erl
index c66f810948..654b9d4bde 100644
--- a/lib/ssh/src/ssh_connection.erl
+++ b/lib/ssh/src/ssh_connection.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2008-2014. All Rights Reserved.
+%% Copyright Ericsson AB 2008-2015. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
@@ -326,9 +326,7 @@ channel_data(ChannelId, DataType, Data,
SendDataType,
SendData)}
end, SendList),
- FlowCtrlMsgs = flow_control(Replies,
- Channel,
- Cache),
+ FlowCtrlMsgs = flow_control(Replies, Channel, Cache),
{{replies, Replies ++ FlowCtrlMsgs}, Connection};
_ ->
gen_fsm:reply(From, {error, closed}),
@@ -470,18 +468,31 @@ handle_msg(#ssh_msg_channel_window_adjust{recipient_channel = ChannelId,
handle_msg(#ssh_msg_channel_open{channel_type = "session" = Type,
sender_channel = RemoteId,
initial_window_size = WindowSz,
- maximum_packet_size = PacketSz}, Connection0, server) ->
-
- try setup_session(Connection0, RemoteId,
- Type, WindowSz, PacketSz) of
- Result ->
- Result
- catch _:_ ->
+ maximum_packet_size = PacketSz},
+ #connection{options = SSHopts} = Connection0,
+ server) ->
+ MinAcceptedPackSz = proplists:get_value(minimal_remote_max_packet_size, SSHopts, 0),
+
+ if
+ MinAcceptedPackSz =< PacketSz ->
+ try setup_session(Connection0, RemoteId,
+ Type, WindowSz, PacketSz) of
+ Result ->
+ Result
+ catch _:_ ->
+ FailMsg = channel_open_failure_msg(RemoteId,
+ ?SSH_OPEN_CONNECT_FAILED,
+ "Connection refused", "en"),
+ {{replies, [{connection_reply, FailMsg}]},
+ Connection0}
+ end;
+
+ MinAcceptedPackSz > PacketSz ->
FailMsg = channel_open_failure_msg(RemoteId,
- ?SSH_OPEN_CONNECT_FAILED,
- "Connection refused", "en"),
- {{replies, [{connection_reply, FailMsg}]},
- Connection0}
+ ?SSH_OPEN_ADMINISTRATIVELY_PROHIBITED,
+ lists:concat(["Maximum packet size below ",MinAcceptedPackSz,
+ " not supported"]), "en"),
+ {{replies, [{connection_reply, FailMsg}]}, Connection0}
end;
handle_msg(#ssh_msg_channel_open{channel_type = "session",
@@ -501,41 +512,57 @@ handle_msg(#ssh_msg_channel_open{channel_type = "forwarded-tcpip" = Type,
initial_window_size = RWindowSz,
maximum_packet_size = RPacketSz,
data = Data},
- #connection{channel_cache = Cache} = Connection0, server) ->
+ #connection{channel_cache = Cache,
+ options = SSHopts} = Connection0, server) ->
<<?UINT32(ALen), Address:ALen/binary, ?UINT32(Port),
?UINT32(OLen), Orig:OLen/binary, ?UINT32(OrigPort)>> = Data,
- case bound_channel(Address, Port, Connection0) of
- undefined ->
+ MinAcceptedPackSz = proplists:get_value(minimal_remote_max_packet_size, SSHopts, 0),
+
+ if
+ MinAcceptedPackSz =< RPacketSz ->
+ case bound_channel(Address, Port, Connection0) of
+ undefined ->
+ FailMsg = channel_open_failure_msg(RemoteId,
+ ?SSH_OPEN_CONNECT_FAILED,
+ "Connection refused", "en"),
+ {{replies,
+ [{connection_reply, FailMsg}]}, Connection0};
+ ChannelPid ->
+ {ChannelId, Connection1} = new_channel_id(Connection0),
+ LWindowSz = ?DEFAULT_WINDOW_SIZE,
+ LPacketSz = ?DEFAULT_PACKET_SIZE,
+ Channel = #channel{type = Type,
+ sys = "none",
+ user = ChannelPid,
+ local_id = ChannelId,
+ recv_window_size = LWindowSz,
+ recv_packet_size = LPacketSz,
+ send_window_size = RWindowSz,
+ send_packet_size = RPacketSz,
+ send_buf = queue:new()
+ },
+ ssh_channel:cache_update(Cache, Channel),
+ OpenConfMsg = channel_open_confirmation_msg(RemoteId, ChannelId,
+ LWindowSz, LPacketSz),
+ {OpenMsg, Connection} =
+ reply_msg(Channel, Connection1,
+ {open, Channel, {forwarded_tcpip,
+ decode_ip(Address), Port,
+ decode_ip(Orig), OrigPort}}),
+ {{replies, [{connection_reply, OpenConfMsg},
+ OpenMsg]}, Connection}
+ end;
+
+ MinAcceptedPackSz > RPacketSz ->
FailMsg = channel_open_failure_msg(RemoteId,
- ?SSH_OPEN_CONNECT_FAILED,
- "Connection refused", "en"),
- {{replies,
- [{connection_reply, FailMsg}]}, Connection0};
- ChannelPid ->
- {ChannelId, Connection1} = new_channel_id(Connection0),
- LWindowSz = ?DEFAULT_WINDOW_SIZE,
- LPacketSz = ?DEFAULT_PACKET_SIZE,
- Channel = #channel{type = Type,
- sys = "none",
- user = ChannelPid,
- local_id = ChannelId,
- recv_window_size = LWindowSz,
- recv_packet_size = LPacketSz,
- send_window_size = RWindowSz,
- send_packet_size = RPacketSz},
- ssh_channel:cache_update(Cache, Channel),
- OpenConfMsg = channel_open_confirmation_msg(RemoteId, ChannelId,
- LWindowSz, LPacketSz),
- {OpenMsg, Connection} =
- reply_msg(Channel, Connection1,
- {open, Channel, {forwarded_tcpip,
- decode_ip(Address), Port,
- decode_ip(Orig), OrigPort}}),
- {{replies, [{connection_reply, OpenConfMsg},
- OpenMsg]}, Connection}
+ ?SSH_OPEN_ADMINISTRATIVELY_PROHIBITED,
+ lists:concat(["Maximum packet size below ",MinAcceptedPackSz,
+ " not supported"]), "en"),
+ {{replies, [{connection_reply, FailMsg}]}, Connection0}
end;
+
handle_msg(#ssh_msg_channel_open{channel_type = "forwarded-tcpip",
sender_channel = RemoteId},
Connection, client) ->
@@ -917,7 +944,8 @@ start_channel(Cb, Id, Args, SubSysSup, Exec) ->
%%--------------------------------------------------------------------
%%% Internal functions
%%--------------------------------------------------------------------
-setup_session(#connection{channel_cache = Cache} = Connection0,
+setup_session(#connection{channel_cache = Cache
+ } = Connection0,
RemoteId,
Type, WindowSize, PacketSize) ->
{ChannelId, Connection} = new_channel_id(Connection0),
@@ -929,6 +957,7 @@ setup_session(#connection{channel_cache = Cache} = Connection0,
recv_packet_size = ?DEFAULT_PACKET_SIZE,
send_window_size = WindowSize,
send_packet_size = PacketSize,
+ send_buf = queue:new(),
remote_id = RemoteId
},
ssh_channel:cache_update(Cache, Channel),
@@ -1024,63 +1053,74 @@ request_reply_or_data(#channel{local_id = ChannelId, user = ChannelPid},
update_send_window(Channel, _, undefined,
#connection{channel_cache = Cache}) ->
- do_update_send_window(Channel, Channel#channel.send_buf, Cache);
+ do_update_send_window(Channel, Cache);
-update_send_window(Channel, DataType, Data,
+update_send_window(#channel{send_buf = SendBuffer} = Channel, DataType, Data,
#connection{channel_cache = Cache}) ->
- do_update_send_window(Channel, Channel#channel.send_buf ++ [{DataType, Data}], Cache).
-
-do_update_send_window(Channel0, Buf0, Cache) ->
- {Buf1, NewSz, Buf2} = get_window(Buf0,
- Channel0#channel.send_packet_size,
- Channel0#channel.send_window_size),
+ do_update_send_window(Channel#channel{send_buf = queue:in({DataType, Data}, SendBuffer)},
+ Cache).
- Channel = Channel0#channel{send_window_size = NewSz, send_buf = Buf2},
+do_update_send_window(Channel0, Cache) ->
+ {SendMsgs, Channel} = get_window(Channel0, []),
ssh_channel:cache_update(Cache, Channel),
- {Buf1, Channel}.
-
-get_window(Bs, PSz, WSz) ->
- get_window(Bs, PSz, WSz, []).
-
-get_window(Bs, _PSz, 0, Acc) ->
- {lists:reverse(Acc), 0, Bs};
-get_window([B0 = {DataType, Bin} | Bs], PSz, WSz, Acc) ->
- BSz = size(Bin),
- if BSz =< WSz -> %% will fit into window
- if BSz =< PSz -> %% will fit into a packet
- get_window(Bs, PSz, WSz-BSz, [B0|Acc]);
- true -> %% split into packet size
- <<Bin1:PSz/binary, Bin2/binary>> = Bin,
- get_window([setelement(2, B0, Bin2) | Bs],
- PSz, WSz-PSz,
- [{DataType, Bin1}|Acc])
+ {SendMsgs, Channel}.
+
+get_window(#channel{send_window_size = 0
+ } = Channel, Acc) ->
+ {lists:reverse(Acc), Channel};
+get_window(#channel{send_packet_size = 0
+ } = Channel, Acc) ->
+ {lists:reverse(Acc), Channel};
+get_window(#channel{send_buf = Buffer,
+ send_packet_size = PacketSize,
+ send_window_size = WindowSize0
+ } = Channel, Acc0) ->
+ case queue:out(Buffer) of
+ {{value, {_, Data} = Msg}, NewBuffer} ->
+ case handle_send_window(Msg, size(Data), PacketSize, WindowSize0, Acc0) of
+ {WindowSize, Acc, {_, <<>>}} ->
+ {lists:reverse(Acc), Channel#channel{send_window_size = WindowSize,
+ send_buf = NewBuffer}};
+ {WindowSize, Acc, Rest} ->
+ get_window(Channel#channel{send_window_size = WindowSize,
+ send_buf = queue:in_r(Rest, NewBuffer)}, Acc)
end;
- WSz =< PSz -> %% use rest of window
- <<Bin1:WSz/binary, Bin2/binary>> = Bin,
- get_window([setelement(2, B0, Bin2) | Bs],
- PSz, WSz-WSz,
- [{DataType, Bin1}|Acc]);
- true -> %% use packet size
- <<Bin1:PSz/binary, Bin2/binary>> = Bin,
- get_window([setelement(2, B0, Bin2) | Bs],
- PSz, WSz-PSz,
- [{DataType, Bin1}|Acc])
+ {empty, NewBuffer} ->
+ {[], Channel#channel{send_buf = NewBuffer}}
+ end.
+
+handle_send_window(Msg = {Type, Data}, Size, PacketSize, WindowSize, Acc) when Size =< WindowSize ->
+ case Size =< PacketSize of
+ true ->
+ {WindowSize - Size, [Msg | Acc], {Type, <<>>}};
+ false ->
+ <<Msg1:PacketSize/binary, Msg2/binary>> = Data,
+ {WindowSize - PacketSize, [{Type, Msg1} | Acc], {Type, Msg2}}
end;
-get_window([], _PSz, WSz, Acc) ->
- {lists:reverse(Acc), WSz, []}.
+handle_send_window({Type, Data}, _, PacketSize, WindowSize, Acc) when WindowSize =< PacketSize ->
+ <<Msg1:WindowSize/binary, Msg2/binary>> = Data,
+ {WindowSize - WindowSize, [{Type, Msg1} | Acc], {Type, Msg2}};
+handle_send_window({Type, Data}, _, PacketSize, WindowSize, Acc) ->
+ <<Msg1:PacketSize/binary, Msg2/binary>> = Data,
+ {WindowSize - PacketSize, [{Type, Msg1} | Acc], {Type, Msg2}}.
flow_control(Channel, Cache) ->
flow_control([window_adjusted], Channel, Cache).
-
+
flow_control([], Channel, Cache) ->
ssh_channel:cache_update(Cache, Channel),
[];
-
flow_control([_|_], #channel{flow_control = From,
- send_buf = []} = Channel, Cache) when From =/= undefined ->
- [{flow_control, Cache, Channel, From, ok}];
+ send_buf = Buffer} = Channel, Cache) when From =/= undefined ->
+ case queue:is_empty(Buffer) of
+ true ->
+ ssh_channel:cache_update(Cache, Channel#channel{flow_control = undefined}),
+ [{flow_control, Cache, Channel, From, ok}];
+ false ->
+ []
+ end;
flow_control(_,_,_) ->
- [].
+ [].
pty_req(ConnectionHandler, Channel, Term, Width, Height,
PixWidth, PixHeight, PtyOpts, TimeOut) ->
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 06:21:56 +0000