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authorIngela Anderton Andin <[email protected]>2012-02-17 14:30:19 +0100
committerIngela Anderton Andin <[email protected]>2012-02-17 14:30:19 +0100
commit0e4ae2a2b5d291b5e918f3ab9e675c4137d1888b (patch)
treed666a8296dbd4c6d128c5a75c6648afd96c39219 /lib/ssh
parent102c34e414f573081a93ca49162dd78cf91949b7 (diff)
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Improved error handling
Diffstat (limited to 'lib/ssh')
-rw-r--r--lib/ssh/src/ssh_auth.erl2
-rw-r--r--lib/ssh/src/ssh_connection_handler.erl160
-rw-r--r--lib/ssh/test/ssh_basic_SUITE.erl30
-rw-r--r--lib/ssh/test/ssh_test_lib.erl8
-rw-r--r--lib/ssh/test/ssh_to_openssh_SUITE.erl14
5 files changed, 134 insertions, 80 deletions
diff --git a/lib/ssh/src/ssh_auth.erl b/lib/ssh/src/ssh_auth.erl
index 62d684f4dc..1a4517c689 100644
--- a/lib/ssh/src/ssh_auth.erl
+++ b/lib/ssh/src/ssh_auth.erl
@@ -340,7 +340,7 @@ verify_sig(SessionId, User, Service, Alg, KeyBlob, SigWLen, Opts) ->
?UINT32(SigLen), Sig:SigLen/binary>> = AlgSig,
ssh_transport:verify(PlainText, sha, Sig, Key);
false ->
- {error, key_unacceptable}
+ false
end.
build_sig_data(SessionId, User, Service, KeyBlob, Alg) ->
diff --git a/lib/ssh/src/ssh_connection_handler.erl b/lib/ssh/src/ssh_connection_handler.erl
index 9079089d5d..670250730d 100644
--- a/lib/ssh/src/ssh_connection_handler.erl
+++ b/lib/ssh/src/ssh_connection_handler.erl
@@ -41,7 +41,7 @@
-export([hello/2, kexinit/2, key_exchange/2, new_keys/2,
userauth/2, connected/2]).
--export([init/1, state_name/3, handle_event/3,
+-export([init/1, handle_event/3,
handle_sync_event/4, handle_info/3, terminate/3, code_change/4]).
%% spawn export
@@ -110,18 +110,23 @@ init([Role, Manager, Socket, SshOpts]) ->
ssh_bits:install_messages(ssh_transport:transport_messages(NumVsn)),
{Protocol, Callback, CloseTag} =
proplists:get_value(transport, SshOpts, {tcp, gen_tcp, tcp_closed}),
- Ssh = init_ssh(Role, NumVsn, StrVsn, SshOpts, Socket),
- {ok, hello, #state{ssh_params =
- Ssh#ssh{send_sequence = 0, recv_sequence = 0},
- socket = Socket,
- decoded_data_buffer = <<>>,
- encoded_data_buffer = <<>>,
- transport_protocol = Protocol,
- transport_cb = Callback,
- transport_close_tag = CloseTag,
- manager = Manager,
- opts = SshOpts
- }}.
+ try init_ssh(Role, NumVsn, StrVsn, SshOpts, Socket) of
+ Ssh ->
+ {ok, hello, #state{ssh_params =
+ Ssh#ssh{send_sequence = 0, recv_sequence = 0},
+ socket = Socket,
+ decoded_data_buffer = <<>>,
+ encoded_data_buffer = <<>>,
+ transport_protocol = Protocol,
+ transport_cb = Callback,
+ transport_close_tag = CloseTag,
+ manager = Manager,
+ opts = SshOpts
+ }}
+ catch
+ exit:Reason ->
+ {stop, {shutdown, Reason}}
+ end.
%%--------------------------------------------------------------------
%% Function:
%% state_name(Event, State) -> {next_state, NextStateName, NextState}|
@@ -179,7 +184,12 @@ kexinit({#ssh_msg_kexinit{} = Kex, Payload},
next_packet(State#state{ssh_params = Ssh})}
catch
#ssh_msg_disconnect{} = DisconnectMsg ->
- handle_disconnect(DisconnectMsg, State)
+ handle_disconnect(DisconnectMsg, State);
+ _:Error ->
+ Desc = log_error(Error),
+ handle_disconnect(#ssh_msg_disconnect{code = ?SSH_DISCONNECT_KEY_EXCHANGE_FAILED,
+ description = Desc,
+ language = "en"}, State)
end.
key_exchange(#ssh_msg_kexdh_init{} = Msg,
@@ -192,7 +202,12 @@ key_exchange(#ssh_msg_kexdh_init{} = Msg,
{next_state, new_keys, next_packet(State#state{ssh_params = Ssh})}
catch
#ssh_msg_disconnect{} = DisconnectMsg ->
- handle_disconnect(DisconnectMsg, State)
+ handle_disconnect(DisconnectMsg, State);
+ _:Error ->
+ Desc = log_error(Error),
+ handle_disconnect(#ssh_msg_disconnect{code = ?SSH_DISCONNECT_KEY_EXCHANGE_FAILED,
+ description = Desc,
+ language = "en"}, State)
end;
key_exchange(#ssh_msg_kexdh_reply{} = Msg,
@@ -203,7 +218,12 @@ key_exchange(#ssh_msg_kexdh_reply{} = Msg,
{next_state, new_keys, next_packet(State#state{ssh_params = Ssh})}
catch
#ssh_msg_disconnect{} = DisconnectMsg ->
- handle_disconnect(DisconnectMsg, State)
+ handle_disconnect(DisconnectMsg, State);
+ _:Error ->
+ Desc = log_error(Error),
+ handle_disconnect(#ssh_msg_disconnect{code = ?SSH_DISCONNECT_KEY_EXCHANGE_FAILED,
+ description = Desc,
+ language = "en"}, State)
end;
key_exchange(#ssh_msg_kex_dh_gex_group{} = Msg,
@@ -216,7 +236,12 @@ key_exchange(#ssh_msg_kex_dh_gex_group{} = Msg,
{next_state, new_keys, next_packet(State#state{ssh_params = Ssh})}
catch
#ssh_msg_disconnect{} = DisconnectMsg ->
- handle_disconnect(DisconnectMsg, State)
+ handle_disconnect(DisconnectMsg, State);
+ _:Error ->
+ Desc = log_error(Error),
+ handle_disconnect(#ssh_msg_disconnect{code = ?SSH_DISCONNECT_KEY_EXCHANGE_FAILED,
+ description = Desc,
+ language = "en"}, State)
end;
key_exchange(#ssh_msg_kex_dh_gex_request{} = Msg,
@@ -227,7 +252,12 @@ key_exchange(#ssh_msg_kex_dh_gex_request{} = Msg,
{next_state, new_keys, next_packet(State#state{ssh_params = Ssh})}
catch
#ssh_msg_disconnect{} = DisconnectMsg ->
- handle_disconnect(DisconnectMsg, State)
+ handle_disconnect(DisconnectMsg, State);
+ _:Error ->
+ Desc = log_error(Error),
+ handle_disconnect(#ssh_msg_disconnect{code = ?SSH_DISCONNECT_KEY_EXCHANGE_FAILED,
+ description = Desc,
+ language = "en"}, State)
end;
key_exchange(#ssh_msg_kex_dh_gex_reply{} = Msg,
#state{ssh_params = #ssh{role = client} = Ssh0} = State) ->
@@ -237,7 +267,12 @@ key_exchange(#ssh_msg_kex_dh_gex_reply{} = Msg,
{next_state, new_keys, next_packet(State#state{ssh_params = Ssh})}
catch
#ssh_msg_disconnect{} = DisconnectMsg ->
- handle_disconnect(DisconnectMsg, State)
+ handle_disconnect(DisconnectMsg, State);
+ _:Error ->
+ Desc = log_error(Error),
+ handle_disconnect(#ssh_msg_disconnect{code = ?SSH_DISCONNECT_KEY_EXCHANGE_FAILED,
+ description = Desc,
+ language = "en"}, State)
end.
new_keys(#ssh_msg_newkeys{} = Msg, #state{ssh_params = Ssh0} = State0) ->
@@ -249,7 +284,12 @@ new_keys(#ssh_msg_newkeys{} = Msg, #state{ssh_params = Ssh0} = State0) ->
catch
#ssh_msg_disconnect{} = DisconnectMsg ->
handle_disconnect(DisconnectMsg, State0),
- {stop, normal, State0}
+ {stop, normal, State0};
+ _:Error ->
+ Desc = log_error(Error),
+ handle_disconnect(#ssh_msg_disconnect{code = ?SSH_DISCONNECT_KEY_EXCHANGE_FAILED,
+ description = Desc,
+ language = "en"}, State0)
end.
userauth(#ssh_msg_service_request{name = "ssh-userauth"} = Msg,
@@ -262,7 +302,12 @@ userauth(#ssh_msg_service_request{name = "ssh-userauth"} = Msg,
{next_state, userauth, next_packet(State#state{ssh_params = Ssh})}
catch
#ssh_msg_disconnect{} = DisconnectMsg ->
- handle_disconnect(DisconnectMsg, State)
+ handle_disconnect(DisconnectMsg, State);
+ _:Error ->
+ Desc = log_error(Error),
+ handle_disconnect(#ssh_msg_disconnect{code = ?SSH_DISCONNECT_SERVICE_NOT_AVAILABLE,
+ description = Desc,
+ language = "en"}, State)
end;
userauth(#ssh_msg_service_accept{name = "ssh-userauth"},
@@ -284,7 +329,12 @@ userauth(#ssh_msg_userauth_request{service = "ssh-connection",
{next_state, userauth, next_packet(State#state{ssh_params = Ssh})}
catch
#ssh_msg_disconnect{} = DisconnectMsg ->
- handle_disconnect(DisconnectMsg, State)
+ handle_disconnect(DisconnectMsg, State);
+ _:Error ->
+ Desc = log_error(Error),
+ handle_disconnect(#ssh_msg_disconnect{code = ?SSH_DISCONNECT_SERVICE_NOT_AVAILABLE,
+ description = Desc,
+ language = "en"}, State)
end;
userauth(#ssh_msg_userauth_request{service = "ssh-connection",
@@ -307,7 +357,12 @@ userauth(#ssh_msg_userauth_request{service = "ssh-connection",
{next_state, userauth, next_packet(State#state{ssh_params = Ssh})}
catch
#ssh_msg_disconnect{} = DisconnectMsg ->
- handle_disconnect(DisconnectMsg, State)
+ handle_disconnect(DisconnectMsg, State);
+ _:Error ->
+ Desc = log_error(Error),
+ handle_disconnect(#ssh_msg_disconnect{code = ?SSH_DISCONNECT_SERVICE_NOT_AVAILABLE,
+ description = Desc,
+ language = "en"}, State)
end;
userauth(#ssh_msg_userauth_info_request{} = Msg,
@@ -319,7 +374,12 @@ userauth(#ssh_msg_userauth_info_request{} = Msg,
{next_state, userauth, next_packet(State#state{ssh_params = Ssh})}
catch
#ssh_msg_disconnect{} = DisconnectMsg ->
- handle_disconnect(DisconnectMsg, State)
+ handle_disconnect(DisconnectMsg, State);
+ _:Error ->
+ Desc = log_error(Error),
+ handle_disconnect(#ssh_msg_disconnect{code = ?SSH_DISCONNECT_SERVICE_NOT_AVAILABLE,
+ description = Desc,
+ language = "en"}, State)
end;
userauth(#ssh_msg_userauth_info_response{} = Msg,
@@ -330,7 +390,12 @@ userauth(#ssh_msg_userauth_info_response{} = Msg,
{next_state, userauth, next_packet(State#state{ssh_params = Ssh})}
catch
#ssh_msg_disconnect{} = DisconnectMsg ->
- handle_disconnect(DisconnectMsg, State)
+ handle_disconnect(DisconnectMsg, State);
+ _:Error ->
+ Desc = log_error(Error),
+ handle_disconnect(#ssh_msg_disconnect{code = ?SSH_DISCONNECT_SERVICE_NOT_AVAILABLE,
+ description = Desc,
+ language = "en"}, State)
end;
userauth(#ssh_msg_userauth_success{}, #state{ssh_params = #ssh{role = client},
@@ -398,25 +463,6 @@ connected({#ssh_msg_kexinit{}, _Payload} = Event, State) ->
kexinit(Event, State#state{renegotiate = true}).
%%--------------------------------------------------------------------
-%% Function:
-%% state_name(Event, From, State) -> {next_state, NextStateName, NextState} |
-%% {next_state, NextStateName,
-%% NextState, Timeout} |
-%% {reply, Reply, NextStateName, NextState}|
-%% {reply, Reply, NextStateName,
-%% NextState, Timeout} |
-%% {stop, Reason, NewState}|
-%% {stop, Reason, Reply, NewState}
-%% Description: There should be one instance of this function for each
-%% possible state name. Whenever a gen_fsm receives an event sent using
-%% gen_fsm:sync_send_event/2,3, the instance of this function with the same
-%% name as the current state name StateName is called to handle the event.
-%%--------------------------------------------------------------------
-state_name(_Event, _From, State) ->
- Reply = ok,
- {reply, Reply, state_name, State}.
-
-%%--------------------------------------------------------------------
%% Function:
%% handle_event(Event, StateName, State) -> {next_state, NextStateName,
%% NextState} |
@@ -566,10 +612,9 @@ handle_info({Protocol, Socket, Data}, Statename,
Statename, State);
handle_info({CloseTag, _Socket}, _StateName,
- #state{transport_close_tag = CloseTag, %%manager = Pid,
+ #state{transport_close_tag = CloseTag,
ssh_params = #ssh{role = _Role, opts = _Opts}} = State) ->
- %%ok = ssh_connection_manager:delivered(Pid),
- {stop, normal, State};
+ {stop, {shutdown, connection_lost}, State};
handle_info(UnexpectedMessage, StateName, #state{ssh_params = SshParams} = State) ->
Msg = lists:flatten(io_lib:format(
"Unexpected message '~p' received in state '~p'\n"
@@ -603,12 +648,18 @@ terminate(shutdown, _, State) ->
language = "en"},
handle_disconnect(DisconnectMsg, State);
-terminate(Reason, _, State) ->
- Desc = io_lib:format("Erlang ssh connection handler failed with reason: "
- "~p , please report this to [email protected] \n",
- [Reason]),
+
+terminate({shutdown, connection_lost}, _, State) ->
DisconnectMsg =
#ssh_msg_disconnect{code = ?SSH_DISCONNECT_CONNECTION_LOST,
+ description = "Connection Lost",
+ language = "en"},
+ handle_disconnect(DisconnectMsg, State);
+
+terminate(Reason, _, State) ->
+ Desc = log_error(Reason),
+ DisconnectMsg =
+ #ssh_msg_disconnect{code = ?SSH_DISCONNECT_SERVICE_NOT_AVAILABLE,
description = Desc,
language = "en"},
handle_disconnect(DisconnectMsg, State).
@@ -928,3 +979,10 @@ ssh_info([peer | Rest], #ssh{peer = Peer} = SshParams, Acc) ->
ssh_info([ _ | Rest], SshParams, Acc) ->
ssh_info(Rest, SshParams, Acc).
+
+log_error(Reason) ->
+ Report = io_lib:format("Erlang ssh connection handler failed with reason: "
+ "~p , please report this to [email protected] \n",
+ [Reason]),
+ error_logger:error_report(Report),
+ "Internal error".
diff --git a/lib/ssh/test/ssh_basic_SUITE.erl b/lib/ssh/test/ssh_basic_SUITE.erl
index 9c13180159..8ec037dd8f 100644
--- a/lib/ssh/test/ssh_basic_SUITE.erl
+++ b/lib/ssh/test/ssh_basic_SUITE.erl
@@ -362,11 +362,11 @@ server_password_option(Config) when is_list(Config) ->
{user_interaction, false},
{user_dir, UserDir}]),
{error, Reason} =
- ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true},
- {user, "vego"},
- {password, "foo"},
- {user_interaction, false},
- {user_dir, UserDir}]),
+ ssh:connect(Host, Port, [{silently_accept_hosts, true},
+ {user, "vego"},
+ {password, "foo"},
+ {user_interaction, false},
+ {user_dir, UserDir}]),
test_server:format("Test of wrong password: Error msg: ~p ~n", [Reason]),
@@ -397,21 +397,21 @@ server_userpassword_option(Config) when is_list(Config) ->
ssh:close(ConnectionRef),
{error, Reason0} =
- ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true},
- {user, "foo"},
- {password, "morot"},
- {user_interaction, false},
- {user_dir, UserDir}]),
+ ssh:connect(Host, Port, [{silently_accept_hosts, true},
+ {user, "foo"},
+ {password, "morot"},
+ {user_interaction, false},
+ {user_dir, UserDir}]),
test_server:format("Test of user foo that does not exist. "
"Error msg: ~p ~n", [Reason0]),
{error, Reason1} =
- ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true},
- {user, "vego"},
- {password, "foo"},
- {user_interaction, false},
- {user_dir, UserDir}]),
+ ssh:connect(Host, Port, [{silently_accept_hosts, true},
+ {user, "vego"},
+ {password, "foo"},
+ {user_interaction, false},
+ {user_dir, UserDir}]),
test_server:format("Test of wrong Password. "
"Error msg: ~p ~n", [Reason1]),
diff --git a/lib/ssh/test/ssh_test_lib.erl b/lib/ssh/test/ssh_test_lib.erl
index 26bbdf5c5c..c8a4fe1c62 100644
--- a/lib/ssh/test/ssh_test_lib.erl
+++ b/lib/ssh/test/ssh_test_lib.erl
@@ -43,12 +43,8 @@ connect(Host, Options) ->
connect(any, Port, Options) ->
connect(hostname(), Port, Options);
connect(Host, Port, Options) ->
- case ssh:connect(Host, Port, Options) of
- {ok, ConnectionRef} ->
- ConnectionRef;
- Error ->
- Error
- end.
+ {ok, ConnectionRef} = ssh:connect(Host, Port, Options),
+ ConnectionRef.
daemon(Options) ->
daemon(any, inet_port(), Options).
diff --git a/lib/ssh/test/ssh_to_openssh_SUITE.erl b/lib/ssh/test/ssh_to_openssh_SUITE.erl
index dfe526564d..c337617ee4 100644
--- a/lib/ssh/test/ssh_to_openssh_SUITE.erl
+++ b/lib/ssh/test/ssh_to_openssh_SUITE.erl
@@ -445,7 +445,7 @@ erlang_client_openssh_server_password(Config) when is_list(Config) ->
%% to make sure we don't public-key-auth
UserDir = ?config(data_dir, Config),
{error, Reason0} =
- ssh_test_lib:connect(?SSH_DEFAULT_PORT, [{silently_accept_hosts, true},
+ ssh:connect(any, ?SSH_DEFAULT_PORT, [{silently_accept_hosts, true},
{user, "foo"},
{password, "morot"},
{user_interaction, false},
@@ -459,12 +459,12 @@ erlang_client_openssh_server_password(Config) when is_list(Config) ->
case length(string:tokens(User, " ")) of
1 ->
{error, Reason1} =
- ssh_test_lib:connect(?SSH_DEFAULT_PORT,
- [{silently_accept_hosts, true},
- {user, User},
- {password, "foo"},
- {user_interaction, false},
- {user_dir, UserDir}]),
+ ssh:connect(any, ?SSH_DEFAULT_PORT,
+ [{silently_accept_hosts, true},
+ {user, User},
+ {password, "foo"},
+ {user_interaction, false},
+ {user_dir, UserDir}]),
test_server:format("Test of wrong Pasword. "
"Error msg: ~p~n", [Reason1]);
_ ->