diff options
Diffstat (limited to 'lib/ssh/src/ssh_connection_handler.erl')
| -rw-r--r-- | lib/ssh/src/ssh_connection_handler.erl | 742 |
1 files changed, 450 insertions, 292 deletions
diff --git a/lib/ssh/src/ssh_connection_handler.erl b/lib/ssh/src/ssh_connection_handler.erl index fc75945a5b..36152bacf7 100644 --- a/lib/ssh/src/ssh_connection_handler.erl +++ b/lib/ssh/src/ssh_connection_handler.erl @@ -46,6 +46,7 @@ %%% Internal application API -export([start_connection/4, + available_hkey_algorithms/2, open_channel/6, request/6, request/7, reply_request/3, @@ -60,7 +61,7 @@ ]). %%% Behaviour callbacks --export([callback_mode/0, handle_event/4, terminate/3, +-export([init/1, callback_mode/0, handle_event/4, terminate/3, format_status/2, code_change/4]). %%% Exports not intended to be used :). They are used for spawning and tests @@ -76,11 +77,15 @@ %%-------------------------------------------------------------------- -spec start_link(role(), inet:socket(), - proplists:proplist() + ssh_options:options() ) -> {ok, pid()}. %% . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . start_link(Role, Socket, Options) -> - {ok, proc_lib:spawn_link(?MODULE, init_connection_handler, [Role, Socket, Options])}. + {ok, proc_lib:spawn_opt(?MODULE, + init_connection_handler, + [Role, Socket, Options], + [link, {message_queue_data,off_heap}] + )}. %%-------------------------------------------------------------------- @@ -99,12 +104,10 @@ stop(ConnectionHandler)-> %% Internal application API %%==================================================================== --define(DefaultTransport, {tcp, gen_tcp, tcp_closed} ). - %%-------------------------------------------------------------------- -spec start_connection(role(), inet:socket(), - proplists:proplist(), + ssh_options:options(), timeout() ) -> {ok, connection_ref()} | {error, term()}. %% . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . @@ -121,9 +124,8 @@ start_connection(client = Role, Socket, Options, Timeout) -> end; start_connection(server = Role, Socket, Options, Timeout) -> - SSH_Opts = proplists:get_value(ssh_opts, Options, []), try - case proplists:get_value(parallel_login, SSH_Opts, false) of + case ?GET_OPT(parallel_login, Options) of true -> HandshakerPid = spawn_link(fun() -> @@ -323,30 +325,38 @@ renegotiate_data(ConnectionHandler) -> %% Internal process state %%==================================================================== -record(data, { - starter :: pid(), + starter :: pid() + | undefined, auth_user :: string() | undefined, connection_state :: #connection{}, - latest_channel_id = 0 :: non_neg_integer(), + latest_channel_id = 0 :: non_neg_integer() + | undefined, idle_timer_ref :: undefined | infinity | reference(), idle_timer_value = infinity :: infinity | pos_integer(), - transport_protocol :: atom(), % ex: tcp - transport_cb :: atom(), % ex: gen_tcp - transport_close_tag :: atom(), % ex: tcp_closed + transport_protocol :: atom() + | undefined, % ex: tcp + transport_cb :: atom() + | undefined, % ex: gen_tcp + transport_close_tag :: atom() + | undefined, % ex: tcp_closed ssh_params :: #ssh{} - | undefined, - socket :: inet:socket(), - decrypted_data_buffer = <<>> :: binary(), - encrypted_data_buffer = <<>> :: binary(), + | undefined, + socket :: inet:socket() + | undefined, + decrypted_data_buffer = <<>> :: binary() + | undefined, + encrypted_data_buffer = <<>> :: binary() + | undefined, undecrypted_packet_length :: undefined | non_neg_integer(), key_exchange_init_msg :: #ssh_msg_kexinit{} | undefined, last_size_rekey = 0 :: non_neg_integer(), event_queue = [] :: list(), - opts :: proplists:proplist(), +% opts :: ssh_options:options(), inet_initial_recbuf_size :: pos_integer() | undefined }). @@ -357,110 +367,121 @@ renegotiate_data(ConnectionHandler) -> %%-------------------------------------------------------------------- -spec init_connection_handler(role(), inet:socket(), - proplists:proplist() + ssh_options:options() ) -> no_return(). %% . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . init_connection_handler(Role, Socket, Opts) -> - process_flag(trap_exit, true), - S0 = init_process_state(Role, Socket, Opts), - try - {Protocol, Callback, CloseTag} = - proplists:get_value(transport, Opts, ?DefaultTransport), - S0#data{ssh_params = init_ssh_record(Role, Socket, Opts), - transport_protocol = Protocol, - transport_cb = Callback, - transport_close_tag = CloseTag - } - of - S -> - gen_statem:enter_loop(?MODULE, - [], %%[{debug,[trace,log,statistics,debug]} || Role==server], - {hello,Role}, - S) - catch - _:Error -> - gen_statem:enter_loop(?MODULE, - [], - {init_error,Error}, - S0) + case init([Role, Socket, Opts]) of + {ok, StartState, D} -> + process_flag(trap_exit, true), + gen_statem:enter_loop(?MODULE, + [], %%[{debug,[trace,log,statistics,debug]} ], %% [] + StartState, + D); + + {stop, Error} -> + Sups = ?GET_INTERNAL_OPT(supervisors, Opts), + C = #connection{system_supervisor = proplists:get_value(system_sup, Sups), + sub_system_supervisor = proplists:get_value(subsystem_sup, Sups), + connection_supervisor = proplists:get_value(connection_sup, Sups) + }, + gen_statem:enter_loop(?MODULE, + [], + {init_error,Error}, + #data{connection_state=C, + socket=Socket}) end. -init_process_state(Role, Socket, Opts) -> - D = #data{connection_state = - C = #connection{channel_cache = ssh_channel:cache_create(), - channel_id_seed = 0, - port_bindings = [], - requests = [], - options = Opts}, - starter = proplists:get_value(user_pid, Opts), - socket = Socket, - opts = Opts - }, - case Role of - client -> - %% Start the renegotiation timers - timer:apply_after(?REKEY_TIMOUT, gen_statem, cast, [self(), renegotiate]), - timer:apply_after(?REKEY_DATA_TIMOUT, gen_statem, cast, [self(), data_size]), - cache_init_idle_timer(D); - server -> - D#data{connection_state = init_connection(Role, C, Opts)} - end. +init([Role,Socket,Opts]) -> + case inet:peername(Socket) of + {ok, PeerAddr} -> + {Protocol, Callback, CloseTag} = ?GET_OPT(transport, Opts), + C = #connection{channel_cache = ssh_channel:cache_create(), + channel_id_seed = 0, + port_bindings = [], + requests = [], + options = Opts}, + D0 = #data{starter = ?GET_INTERNAL_OPT(user_pid, Opts), + connection_state = C, + socket = Socket, + transport_protocol = Protocol, + transport_cb = Callback, + transport_close_tag = CloseTag, + ssh_params = init_ssh_record(Role, Socket, PeerAddr, Opts) + }, + D = case Role of + client -> + %% Start the renegotiation timers + timer:apply_after(?REKEY_TIMOUT, gen_statem, cast, [self(), renegotiate]), + timer:apply_after(?REKEY_DATA_TIMOUT, gen_statem, cast, [self(), data_size]), + cache_init_idle_timer(D0); + server -> + Sups = ?GET_INTERNAL_OPT(supervisors, Opts), + cache_init_idle_timer( + D0#data{connection_state = + C#connection{cli_spec = ?GET_OPT(ssh_cli, Opts, {ssh_cli,[?GET_OPT(shell, Opts)]}), + exec = ?GET_OPT(exec, Opts), + system_supervisor = proplists:get_value(system_sup, Sups), + sub_system_supervisor = proplists:get_value(subsystem_sup, Sups), + connection_supervisor = proplists:get_value(connection_sup, Sups) + }}) + end, + {ok, {hello,Role}, D}; + + {error,Error} -> + {stop, Error} + end. -init_connection(server, C = #connection{}, Opts) -> - Sups = proplists:get_value(supervisors, Opts), - SystemSup = proplists:get_value(system_sup, Sups), - SubSystemSup = proplists:get_value(subsystem_sup, Sups), - ConnectionSup = proplists:get_value(connection_sup, Sups), - Shell = proplists:get_value(shell, Opts), - Exec = proplists:get_value(exec, Opts), - CliSpec = proplists:get_value(ssh_cli, Opts, {ssh_cli, [Shell]}), - C#connection{cli_spec = CliSpec, - exec = Exec, - system_supervisor = SystemSup, - sub_system_supervisor = SubSystemSup, - connection_supervisor = ConnectionSup - }. init_ssh_record(Role, Socket, Opts) -> - {ok, PeerAddr} = inet:peername(Socket), - KeyCb = proplists:get_value(key_cb, Opts, ssh_file), - AuthMethods = proplists:get_value(auth_methods, - Opts, - case Role of - server -> ?SUPPORTED_AUTH_METHODS; - client -> undefined - end), + %% Export of this internal function is + %% intended for low-level protocol test suites + {ok,PeerAddr} = inet:peername(Socket), + init_ssh_record(Role, Socket, PeerAddr, Opts). + +init_ssh_record(Role, _Socket, PeerAddr, Opts) -> + AuthMethods = ?GET_OPT(auth_methods, Opts), S0 = #ssh{role = Role, - key_cb = KeyCb, + key_cb = ?GET_OPT(key_cb, Opts), opts = Opts, userauth_supported_methods = AuthMethods, - available_host_keys = supported_host_keys(Role, KeyCb, Opts), - random_length_padding = proplists:get_value(max_random_length_padding, - Opts, - (#ssh{})#ssh.random_length_padding) + available_host_keys = available_hkey_algorithms(Role, Opts), + random_length_padding = ?GET_OPT(max_random_length_padding, Opts) }, {Vsn, Version} = ssh_transport:versions(Role, Opts), case Role of client -> - PeerName = proplists:get_value(host, Opts), - S0#ssh{c_vsn = Vsn, - c_version = Version, - io_cb = case proplists:get_value(user_interaction, Opts, true) of - true -> ssh_io; - false -> ssh_no_io - end, - userauth_quiet_mode = proplists:get_value(quiet_mode, Opts, false), - peer = {PeerName, PeerAddr} - }; + PeerName = case ?GET_INTERNAL_OPT(host, Opts) of + PeerIP when is_tuple(PeerIP) -> + inet_parse:ntoa(PeerIP); + PeerName0 when is_atom(PeerName0) -> + atom_to_list(PeerName0); + PeerName0 when is_list(PeerName0) -> + PeerName0 + end, + S1 = + S0#ssh{c_vsn = Vsn, + c_version = Version, + io_cb = case ?GET_OPT(user_interaction, Opts) of + true -> ssh_io; + false -> ssh_no_io + end, + userauth_quiet_mode = ?GET_OPT(quiet_mode, Opts), + peer = {PeerName, PeerAddr} + }, + S1#ssh{userauth_pubkeys = [K || K <- ?GET_OPT(pref_public_key_algs, Opts), + is_usable_user_pubkey(K, S1) + ] + }; server -> S0#ssh{s_vsn = Vsn, s_version = Version, - io_cb = proplists:get_value(io_cb, Opts, ssh_io), + io_cb = ?GET_INTERNAL_OPT(io_cb, Opts, ssh_io), userauth_methods = string:tokens(AuthMethods, ","), kb_tries_left = 3, peer = {undefined, PeerAddr} @@ -478,49 +499,63 @@ init_ssh_record(Role, Socket, Opts) -> -type renegotiate_flag() :: init | renegotiate. -type state_name() :: - {init_error,any()} - | {hello, role()} - | {kexinit, role(), renegotiate_flag()} - | {key_exchange, role(), renegotiate_flag()} - | {key_exchange_dh_gex_init, server, renegotiate_flag()} + {hello, role() } + | {kexinit, role(), renegotiate_flag()} + | {key_exchange, role(), renegotiate_flag()} + | {key_exchange_dh_gex_init, server, renegotiate_flag()} | {key_exchange_dh_gex_reply, client, renegotiate_flag()} - | {new_keys, role()} - | {service_request, role()} - | {userauth, role()} - | {userauth_keyboard_interactive, role()} - | {connected, role()} + | {new_keys, role(), renegotiate_flag()} + | {ext_info, role(), renegotiate_flag()} + | {service_request, role() } + | {userauth, role() } + | {userauth_keyboard_interactive, role() } + | {userauth_keyboard_interactive_extra, server } + | {userauth_keyboard_interactive_info_response, client } + | {connected, role() } . --type handle_event_result() :: gen_statem:handle_event_result(). +%% The state names must fulfill some rules regarding +%% where the role() and the renegotiate_flag() is placed: + +-spec role(state_name()) -> role(). +role({_,Role}) -> Role; +role({_,Role,_}) -> Role. + +-spec renegotiation(state_name()) -> boolean(). +renegotiation({_,_,ReNeg}) -> ReNeg == renegotiate; +renegotiation(_) -> false. + + +-define(CONNECTED(StateName), + (element(1,StateName) == connected orelse + element(1,StateName) == ext_info ) ). -spec handle_event(gen_statem:event_type(), event_content(), state_name(), #data{} - ) -> handle_event_result(). + ) -> gen_statem:event_handler_result(state_name()) . %% . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -%%% ######## Error in the initialisation #### - callback_mode() -> handle_event_function. + handle_event(_, _Event, {init_error,Error}, _) -> case Error of - {badmatch,{error,enotconn}} -> - %% Handles the abnormal sequence: - %% SYN-> - %% <-SYNACK - %% ACK-> - %% RST-> - {stop, {shutdown,"TCP connenction to server was prematurely closed by the client"}}; - - OtherError -> - {stop, {shutdown,{init,OtherError}}} + enotconn -> + %% Handles the abnormal sequence: + %% SYN-> + %% <-SYNACK + %% ACK-> + %% RST-> + {stop, {shutdown,"TCP connenction to server was prematurely closed by the client"}}; + + OtherError -> + {stop, {shutdown,{init,OtherError}}} end; - %%% ######## {hello, client|server} #### %% The very first event that is sent when the we are set as controlling process of Socket handle_event(_, socket_control, {hello,_}, D) -> @@ -598,13 +633,17 @@ handle_event(_, {#ssh_msg_kexinit{}=Kex, Payload}, {kexinit,Role,ReNeg}, handle_event(_, #ssh_msg_kexdh_init{} = Msg, {key_exchange,server,ReNeg}, D) -> {ok, KexdhReply, Ssh1} = ssh_transport:handle_kexdh_init(Msg, D#data.ssh_params), send_bytes(KexdhReply, D), - {ok, NewKeys, Ssh} = ssh_transport:new_keys_message(Ssh1), + {ok, NewKeys, Ssh2} = ssh_transport:new_keys_message(Ssh1), send_bytes(NewKeys, D), + {ok, ExtInfo, Ssh} = ssh_transport:ext_info_message(Ssh2), + send_bytes(ExtInfo, D), {next_state, {new_keys,server,ReNeg}, D#data{ssh_params=Ssh}}; handle_event(_, #ssh_msg_kexdh_reply{} = Msg, {key_exchange,client,ReNeg}, D) -> - {ok, NewKeys, Ssh} = ssh_transport:handle_kexdh_reply(Msg, D#data.ssh_params), + {ok, NewKeys, Ssh1} = ssh_transport:handle_kexdh_reply(Msg, D#data.ssh_params), send_bytes(NewKeys, D), + {ok, ExtInfo, Ssh} = ssh_transport:ext_info_message(Ssh1), + send_bytes(ExtInfo, D), {next_state, {new_keys,client,ReNeg}, D#data{ssh_params=Ssh}}; %%%---- diffie-hellman group exchange @@ -629,13 +668,17 @@ handle_event(_, #ssh_msg_kex_dh_gex_group{} = Msg, {key_exchange,client,ReNeg}, handle_event(_, #ssh_msg_kex_ecdh_init{} = Msg, {key_exchange,server,ReNeg}, D) -> {ok, KexEcdhReply, Ssh1} = ssh_transport:handle_kex_ecdh_init(Msg, D#data.ssh_params), send_bytes(KexEcdhReply, D), - {ok, NewKeys, Ssh} = ssh_transport:new_keys_message(Ssh1), + {ok, NewKeys, Ssh2} = ssh_transport:new_keys_message(Ssh1), send_bytes(NewKeys, D), + {ok, ExtInfo, Ssh} = ssh_transport:ext_info_message(Ssh2), + send_bytes(ExtInfo, D), {next_state, {new_keys,server,ReNeg}, D#data{ssh_params=Ssh}}; handle_event(_, #ssh_msg_kex_ecdh_reply{} = Msg, {key_exchange,client,ReNeg}, D) -> - {ok, NewKeys, Ssh} = ssh_transport:handle_kex_ecdh_reply(Msg, D#data.ssh_params), + {ok, NewKeys, Ssh1} = ssh_transport:handle_kex_ecdh_reply(Msg, D#data.ssh_params), send_bytes(NewKeys, D), + {ok, ExtInfo, Ssh} = ssh_transport:ext_info_message(Ssh1), + send_bytes(ExtInfo, D), {next_state, {new_keys,client,ReNeg}, D#data{ssh_params=Ssh}}; @@ -644,8 +687,10 @@ handle_event(_, #ssh_msg_kex_ecdh_reply{} = Msg, {key_exchange,client,ReNeg}, D) handle_event(_, #ssh_msg_kex_dh_gex_init{} = Msg, {key_exchange_dh_gex_init,server,ReNeg}, D) -> {ok, KexGexReply, Ssh1} = ssh_transport:handle_kex_dh_gex_init(Msg, D#data.ssh_params), send_bytes(KexGexReply, D), - {ok, NewKeys, Ssh} = ssh_transport:new_keys_message(Ssh1), + {ok, NewKeys, Ssh2} = ssh_transport:new_keys_message(Ssh1), send_bytes(NewKeys, D), + {ok, ExtInfo, Ssh} = ssh_transport:ext_info_message(Ssh2), + send_bytes(ExtInfo, D), {next_state, {new_keys,server,ReNeg}, D#data{ssh_params=Ssh}}; @@ -654,30 +699,60 @@ handle_event(_, #ssh_msg_kex_dh_gex_init{} = Msg, {key_exchange_dh_gex_init,serv handle_event(_, #ssh_msg_kex_dh_gex_reply{} = Msg, {key_exchange_dh_gex_reply,client,ReNeg}, D) -> {ok, NewKeys, Ssh1} = ssh_transport:handle_kex_dh_gex_reply(Msg, D#data.ssh_params), send_bytes(NewKeys, D), - {next_state, {new_keys,client,ReNeg}, D#data{ssh_params=Ssh1}}; + {ok, ExtInfo, Ssh} = ssh_transport:ext_info_message(Ssh1), + send_bytes(ExtInfo, D), + {next_state, {new_keys,client,ReNeg}, D#data{ssh_params=Ssh}}; %%% ######## {new_keys, client|server} #### %% First key exchange round: -handle_event(_, #ssh_msg_newkeys{} = Msg, {new_keys,Role,init}, D) -> +handle_event(_, #ssh_msg_newkeys{} = Msg, {new_keys,client,init}, D) -> {ok, Ssh1} = ssh_transport:handle_new_keys(Msg, D#data.ssh_params), - Ssh = case Role of - client -> - {MsgReq, Ssh2} = ssh_auth:service_request_msg(Ssh1), - send_bytes(MsgReq, D), - Ssh2; - server -> - Ssh1 - end, - {next_state, {service_request,Role}, D#data{ssh_params=Ssh}}; + %% {ok, ExtInfo, Ssh2} = ssh_transport:ext_info_message(Ssh1), + %% send_bytes(ExtInfo, D), + {MsgReq, Ssh} = ssh_auth:service_request_msg(Ssh1), + send_bytes(MsgReq, D), + {next_state, {ext_info,client,init}, D#data{ssh_params=Ssh}}; + +handle_event(_, #ssh_msg_newkeys{} = Msg, {new_keys,server,init}, D) -> + {ok, Ssh} = ssh_transport:handle_new_keys(Msg, D#data.ssh_params), + %% {ok, ExtInfo, Ssh} = ssh_transport:ext_info_message(Ssh1), + %% send_bytes(ExtInfo, D), + {next_state, {ext_info,server,init}, D#data{ssh_params=Ssh}}; %% Subsequent key exchange rounds (renegotiation): handle_event(_, #ssh_msg_newkeys{} = Msg, {new_keys,Role,renegotiate}, D) -> {ok, Ssh} = ssh_transport:handle_new_keys(Msg, D#data.ssh_params), - {next_state, {connected,Role}, D#data{ssh_params=Ssh}}; + %% {ok, ExtInfo, Ssh} = ssh_transport:ext_info_message(Ssh1), + %% send_bytes(ExtInfo, D), + {next_state, {ext_info,Role,renegotiate}, D#data{ssh_params=Ssh}}; + -%%% ######## {service_request, client|server} +%%% ######## {ext_info, client|server, init|renegotiate} #### + +handle_event(_, #ssh_msg_ext_info{}=Msg, {ext_info,Role,init}, D0) -> + D = handle_ssh_msg_ext_info(Msg, D0), + {next_state, {service_request,Role}, D}; + +handle_event(_, #ssh_msg_ext_info{}=Msg, {ext_info,Role,renegotiate}, D0) -> + D = handle_ssh_msg_ext_info(Msg, D0), + {next_state, {connected,Role}, D}; + +handle_event(_, #ssh_msg_newkeys{}=Msg, {ext_info,_Role,renegotiate}, D) -> + {ok, Ssh} = ssh_transport:handle_new_keys(Msg, D#data.ssh_params), + {keep_state, D#data{ssh_params = Ssh}}; + + +handle_event(internal, Msg, {ext_info,Role,init}, D) when is_tuple(Msg) -> + %% If something else arrives, goto next state and handle the event in that one + {next_state, {service_request,Role}, D, [postpone]}; + +handle_event(internal, Msg, {ext_info,Role,_ReNegFlag}, D) when is_tuple(Msg) -> + %% If something else arrives, goto next state and handle the event in that one + {next_state, {connected,Role}, D, [postpone]}; + +%%% ######## {service_request, client|server} #### handle_event(_, Msg = #ssh_msg_service_request{name=ServiceName}, StateName = {service_request,server}, D) -> case ServiceName of @@ -756,6 +831,11 @@ handle_event(_, end; %%---- userauth success to client +handle_event(_, #ssh_msg_ext_info{}=Msg, {userauth,client}, D0) -> + %% FIXME: need new state to receive this msg! + D = handle_ssh_msg_ext_info(Msg, D0), + {keep_state, D}; + handle_event(_, #ssh_msg_userauth_success{}, {userauth,client}, D=#data{ssh_params = Ssh}) -> D#data.starter ! ssh_connected, {next_state, {connected,client}, D#data{ssh_params=Ssh#ssh{authenticated = true}}}; @@ -810,7 +890,7 @@ handle_event(_, #ssh_msg_userauth_info_request{} = Msg, {userauth_keyboard_inter send_bytes(Reply, D), {next_state, {userauth_keyboard_interactive_info_response,client}, D#data{ssh_params = Ssh}}; not_ok -> - {next_state, {userauth,client}, D, [{next_event, internal, Msg}]} + {next_state, {userauth,client}, D, [postpone]} end; handle_event(_, #ssh_msg_userauth_info_response{} = Msg, {userauth_keyboard_interactive, server}, D) -> @@ -839,42 +919,45 @@ handle_event(_, #ssh_msg_userauth_info_response{} = Msg, {userauth_keyboard_inte {next_state, {connected,server}, D#data{auth_user = User, ssh_params = Ssh#ssh{authenticated = true}}}; -handle_event(_, Msg = #ssh_msg_userauth_failure{}, {userauth_keyboard_interactive, client}, +handle_event(_, #ssh_msg_userauth_failure{}, {userauth_keyboard_interactive, client}, #data{ssh_params = Ssh0} = D0) -> Prefs = [{Method,M,F,A} || {Method,M,F,A} <- Ssh0#ssh.userauth_preference, Method =/= "keyboard-interactive"], D = D0#data{ssh_params = Ssh0#ssh{userauth_preference=Prefs}}, - {next_state, {userauth,client}, D, [{next_event, internal, Msg}]}; + {next_state, {userauth,client}, D, [postpone]}; -handle_event(_, Msg=#ssh_msg_userauth_failure{}, {userauth_keyboard_interactive_info_response, client}, +handle_event(_, #ssh_msg_userauth_failure{}, {userauth_keyboard_interactive_info_response, client}, #data{ssh_params = Ssh0} = D0) -> Opts = Ssh0#ssh.opts, - D = case proplists:get_value(password, Opts) of + D = case ?GET_OPT(password, Opts) of undefined -> D0; _ -> D0#data{ssh_params = - Ssh0#ssh{opts = - lists:keyreplace(password,1,Opts, - {password,not_ok})}} % FIXME:intermodule dependency + Ssh0#ssh{opts = ?PUT_OPT({password,not_ok}, Opts)}} % FIXME:intermodule dependency end, - {next_state, {userauth,client}, D, [{next_event, internal, Msg}]}; + {next_state, {userauth,client}, D, [postpone]}; -handle_event(_, Msg=#ssh_msg_userauth_success{}, {userauth_keyboard_interactive_info_response, client}, D) -> - {next_state, {userauth,client}, D, [{next_event, internal, Msg}]}; +handle_event(_, #ssh_msg_ext_info{}=Msg, {userauth_keyboard_interactive_info_response, client}, D0) -> + %% FIXME: need new state to receive this msg! + D = handle_ssh_msg_ext_info(Msg, D0), + {keep_state, D}; -handle_event(_, Msg=#ssh_msg_userauth_info_request{}, {userauth_keyboard_interactive_info_response, client}, D) -> - {next_state, {userauth_keyboard_interactive,client}, D, [{next_event, internal, Msg}]}; +handle_event(_, #ssh_msg_userauth_success{}, {userauth_keyboard_interactive_info_response, client}, D) -> + {next_state, {userauth,client}, D, [postpone]}; + +handle_event(_, #ssh_msg_userauth_info_request{}, {userauth_keyboard_interactive_info_response, client}, D) -> + {next_state, {userauth_keyboard_interactive,client}, D, [postpone]}; %%% ######## {connected, client|server} #### -handle_event(_, {#ssh_msg_kexinit{},_} = Event, {connected,Role}, D0) -> +handle_event(_, {#ssh_msg_kexinit{},_}, {connected,Role}, D0) -> {KeyInitMsg, SshPacket, Ssh} = ssh_transport:key_exchange_init_msg(D0#data.ssh_params), D = D0#data{ssh_params = Ssh, key_exchange_init_msg = KeyInitMsg}, send_bytes(SshPacket, D), - {next_state, {kexinit,Role,renegotiate}, D, [{next_event, internal, Event}]}; + {next_state, {kexinit,Role,renegotiate}, D, [postpone]}; handle_event(_, #ssh_msg_disconnect{description=Desc} = Msg, StateName, D0) -> {disconnect, _, {{replies,Replies}, _}} = @@ -923,6 +1006,9 @@ handle_event(internal, Msg=#ssh_msg_channel_extended_data{}, StateName, D) - handle_event(internal, Msg=#ssh_msg_channel_eof{}, StateName, D) -> handle_connection_msg(Msg, StateName, D); +handle_event(internal, Msg=#ssh_msg_channel_close{}, {connected,server} = StateName, D) -> + handle_connection_msg(Msg, StateName, cache_request_idle_timer_check(D)); + handle_event(internal, Msg=#ssh_msg_channel_close{}, StateName, D) -> handle_connection_msg(Msg, StateName, D); @@ -954,7 +1040,7 @@ handle_event(cast, renegotiate, _, _) -> handle_event(cast, data_size, {connected,Role}, D) -> {ok, [{send_oct,Sent0}]} = inet:getstat(D#data.socket, [send_oct]), Sent = Sent0 - D#data.last_size_rekey, - MaxSent = proplists:get_value(rekey_limit, D#data.opts, 1024000000), + MaxSent = ?GET_OPT(rekey_limit, (D#data.ssh_params)#ssh.opts), timer:apply_after(?REKEY_DATA_TIMOUT, gen_statem, cast, [self(), data_size]), case Sent >= MaxSent of true -> @@ -975,12 +1061,10 @@ handle_event(cast, data_size, _, _) -> -handle_event(cast, _, StateName, _) when StateName /= {connected,server}, - StateName /= {connected,client} -> +handle_event(cast, _, StateName, _) when not ?CONNECTED(StateName) -> {keep_state_and_data, [postpone]}; - -handle_event(cast, {adjust_window,ChannelId,Bytes}, {connected,_}, D) -> +handle_event(cast, {adjust_window,ChannelId,Bytes}, StateName, D) when ?CONNECTED(StateName) -> case ssh_channel:cache_lookup(cache(D), ChannelId) of #channel{recv_window_size = WinSize, recv_window_pending = Pending, @@ -1006,7 +1090,7 @@ handle_event(cast, {adjust_window,ChannelId,Bytes}, {connected,_}, D) -> keep_state_and_data end; -handle_event(cast, {reply_request,success,ChannelId}, {connected,_}, D) -> +handle_event(cast, {reply_request,success,ChannelId}, StateName, D) when ?CONNECTED(StateName) -> case ssh_channel:cache_lookup(cache(D), ChannelId) of #channel{remote_id = RemoteId} -> Msg = ssh_connection:channel_success_msg(RemoteId), @@ -1017,13 +1101,13 @@ handle_event(cast, {reply_request,success,ChannelId}, {connected,_}, D) -> keep_state_and_data end; -handle_event(cast, {request,ChannelPid, ChannelId, Type, Data}, {connected,_}, D) -> +handle_event(cast, {request,ChannelPid, ChannelId, Type, Data}, StateName, D) when ?CONNECTED(StateName) -> {keep_state, handle_request(ChannelPid, ChannelId, Type, Data, false, none, D)}; -handle_event(cast, {request,ChannelId,Type,Data}, {connected,_}, D) -> +handle_event(cast, {request,ChannelId,Type,Data}, StateName, D) when ?CONNECTED(StateName) -> {keep_state, handle_request(ChannelId, Type, Data, false, none, D)}; -handle_event(cast, {unknown,Data}, {connected,_}, D) -> +handle_event(cast, {unknown,Data}, StateName, D) when ?CONNECTED(StateName) -> Msg = #ssh_msg_unimplemented{sequence = Data}, {keep_state, send_msg(Msg,D)}; @@ -1084,30 +1168,42 @@ handle_event({call,From}, stop, StateName, D0) -> {Repls,D} = send_replies(Replies, D0), {stop_and_reply, normal, [{reply,From,ok}|Repls], D#data{connection_state=Connection}}; -handle_event({call,_}, _, StateName, _) when StateName /= {connected,server}, - StateName /= {connected,client} -> + +handle_event({call,_}, _, StateName, _) when not ?CONNECTED(StateName) -> {keep_state_and_data, [postpone]}; -handle_event({call,From}, {request, ChannelPid, ChannelId, Type, Data, Timeout}, {connected,_}, D0) -> - D = handle_request(ChannelPid, ChannelId, Type, Data, true, From, D0), - %% Note reply to channel will happen later when reply is recived from peer on the socket - start_channel_request_timer(ChannelId, From, Timeout), - {keep_state, cache_request_idle_timer_check(D)}; +handle_event({call,From}, {request, ChannelPid, ChannelId, Type, Data, Timeout}, StateName, D0) + when ?CONNECTED(StateName) -> + case handle_request(ChannelPid, ChannelId, Type, Data, true, From, D0) of + {error,Error} -> + {keep_state, D0, {reply,From,{error,Error}}}; + D -> + %% Note reply to channel will happen later when reply is recived from peer on the socket + start_channel_request_timer(ChannelId, From, Timeout), + {keep_state, cache_request_idle_timer_check(D)} + end; -handle_event({call,From}, {request, ChannelId, Type, Data, Timeout}, {connected,_}, D0) -> - D = handle_request(ChannelId, Type, Data, true, From, D0), - %% Note reply to channel will happen later when reply is recived from peer on the socket - start_channel_request_timer(ChannelId, From, Timeout), - {keep_state, cache_request_idle_timer_check(D)}; +handle_event({call,From}, {request, ChannelId, Type, Data, Timeout}, StateName, D0) + when ?CONNECTED(StateName) -> + case handle_request(ChannelId, Type, Data, true, From, D0) of + {error,Error} -> + {keep_state, D0, {reply,From,{error,Error}}}; + D -> + %% Note reply to channel will happen later when reply is recived from peer on the socket + start_channel_request_timer(ChannelId, From, Timeout), + {keep_state, cache_request_idle_timer_check(D)} + end; -handle_event({call,From}, {data, ChannelId, Type, Data, Timeout}, {connected,_}, D0) -> +handle_event({call,From}, {data, ChannelId, Type, Data, Timeout}, StateName, D0) + when ?CONNECTED(StateName) -> {{replies, Replies}, Connection} = ssh_connection:channel_data(ChannelId, Type, Data, D0#data.connection_state, From), {Repls,D} = send_replies(Replies, D0#data{connection_state = Connection}), start_channel_request_timer(ChannelId, From, Timeout), % FIXME: No message exchange so why? {keep_state, D, Repls}; -handle_event({call,From}, {eof, ChannelId}, {connected,_}, D0) -> +handle_event({call,From}, {eof, ChannelId}, StateName, D0) + when ?CONNECTED(StateName) -> case ssh_channel:cache_lookup(cache(D0), ChannelId) of #channel{remote_id = Id, sent_close = false} -> D = send_msg(ssh_connection:channel_eof_msg(Id), D0), @@ -1118,8 +1214,8 @@ handle_event({call,From}, {eof, ChannelId}, {connected,_}, D0) -> handle_event({call,From}, {open, ChannelPid, Type, InitialWindowSize, MaxPacketSize, Data, Timeout}, - {connected,_}, - D0) -> + StateName, + D0) when ?CONNECTED(StateName) -> erlang:monitor(process, ChannelPid), {ChannelId, D1} = new_channel_id(D0), D2 = send_msg(ssh_connection:channel_open_msg(Type, ChannelId, @@ -1139,7 +1235,8 @@ handle_event({call,From}, start_channel_request_timer(ChannelId, From, Timeout), {keep_state, cache_cancel_idle_timer(D)}; -handle_event({call,From}, {send_window, ChannelId}, {connected,_}, D) -> +handle_event({call,From}, {send_window, ChannelId}, StateName, D) + when ?CONNECTED(StateName) -> Reply = case ssh_channel:cache_lookup(cache(D), ChannelId) of #channel{send_window_size = WinSize, send_packet_size = Packsize} -> @@ -1149,7 +1246,8 @@ handle_event({call,From}, {send_window, ChannelId}, {connected,_}, D) -> end, {keep_state_and_data, [{reply,From,Reply}]}; -handle_event({call,From}, {recv_window, ChannelId}, {connected,_}, D) -> +handle_event({call,From}, {recv_window, ChannelId}, StateName, D) + when ?CONNECTED(StateName) -> Reply = case ssh_channel:cache_lookup(cache(D), ChannelId) of #channel{recv_window_size = WinSize, recv_packet_size = Packsize} -> @@ -1159,7 +1257,8 @@ handle_event({call,From}, {recv_window, ChannelId}, {connected,_}, D) -> end, {keep_state_and_data, [{reply,From,Reply}]}; -handle_event({call,From}, {close, ChannelId}, {connected,_}, D0) -> +handle_event({call,From}, {close, ChannelId}, StateName, D0) + when ?CONNECTED(StateName) -> case ssh_channel:cache_lookup(cache(D0), ChannelId) of #channel{remote_id = Id} = Channel -> D1 = send_msg(ssh_connection:channel_close_msg(Id), D0), @@ -1280,8 +1379,21 @@ handle_event(info, {'DOWN', _Ref, process, ChannelPid, _Reason}, _, D0) -> {keep_state, D, Repls}; %%% So that terminate will be run when supervisor is shutdown -handle_event(info, {'EXIT', _Sup, Reason}, _, _) -> - {stop, {shutdown, Reason}}; +handle_event(info, {'EXIT', _Sup, Reason}, StateName, _) -> + Role = role(StateName), + if + Role == client -> + %% OTP-8111 tells this function clause fixes a problem in + %% clients, but there were no check for that role. + {stop, {shutdown, Reason}}; + + Reason == normal -> + %% An exit normal should not cause a server to crash. This has happend... + keep_state_and_data; + + true -> + {stop, {shutdown, Reason}} + end; handle_event(info, check_cache, _, D) -> {keep_state, cache_check_set_idle_timer(D)}; @@ -1291,14 +1403,16 @@ handle_event(info, UnexpectedMessage, StateName, D = #data{ssh_params = Ssh}) -> report -> Msg = lists:flatten( io_lib:format( + "*** SSH: " "Unexpected message '~p' received in state '~p'\n" "Role: ~p\n" "Peer: ~p\n" - "Local Address: ~p\n", [UnexpectedMessage, - StateName, - Ssh#ssh.role, - Ssh#ssh.peer, - proplists:get_value(address, Ssh#ssh.opts)])), + "Local Address: ~p\n", + [UnexpectedMessage, + StateName, + Ssh#ssh.role, + Ssh#ssh.peer, + ?GET_INTERNAL_OPT(address, Ssh#ssh.opts, undefined)])), error_logger:info_report(Msg), keep_state_and_data; @@ -1307,16 +1421,18 @@ handle_event(info, UnexpectedMessage, StateName, D = #data{ssh_params = Ssh}) -> Other -> Msg = lists:flatten( - io_lib:format("Call to fun in 'unexpectedfun' failed:~n" + io_lib:format("*** SSH: " + "Call to fun in 'unexpectedfun' failed:~n" "Return: ~p\n" "Message: ~p\n" "Role: ~p\n" "Peer: ~p\n" - "Local Address: ~p\n", [Other, - UnexpectedMessage, - Ssh#ssh.role, - element(2,Ssh#ssh.peer), - proplists:get_value(address, Ssh#ssh.opts)] + "Local Address: ~p\n", + [Other, + UnexpectedMessage, + Ssh#ssh.role, + Ssh#ssh.peer, + ?GET_INTERNAL_OPT(address, Ssh#ssh.opts, undefined)] )), error_logger:error_report(Msg), keep_state_and_data @@ -1325,11 +1441,16 @@ handle_event(info, UnexpectedMessage, StateName, D = #data{ssh_params = Ssh}) -> handle_event(internal, {disconnect,Msg,_Reason}, StateName, D) -> disconnect(Msg, StateName, D); +handle_event(_Type, _Msg, {ext_info,Role,_ReNegFlag}, D) -> + %% If something else arrives, goto next state and handle the event in that one + {next_state, {connected,Role}, D, [postpone]}; + handle_event(Type, Ev, StateName, D) -> Descr = case catch atom_to_list(element(1,Ev)) of "ssh_msg_" ++_ when Type==internal -> - "Message in wrong state"; +%% "Message in wrong state"; + lists:flatten(io_lib:format("Message ~p in wrong state (~p)", [element(1,Ev), StateName])); _ -> "Internal error" end, @@ -1360,13 +1481,12 @@ terminate(shutdown, StateName, State0) -> State0), finalize_termination(StateName, State); -%% terminate({shutdown,Msg}, StateName, State0) when is_record(Msg,ssh_msg_disconnect)-> -%% State = send_msg(Msg, State0), -%% finalize_termination(StateName, Msg, State); - terminate({shutdown,_R}, StateName, State) -> finalize_termination(StateName, State); +terminate(kill, StateName, State) -> + finalize_termination(StateName, State); + terminate(Reason, StateName, State0) -> %% Others, e.g undef, {badmatch,_} log_error(Reason), @@ -1438,11 +1558,11 @@ code_change(_OldVsn, StateName, State, _Extra) -> %%-------------------------------------------------------------------- %% Starting -start_the_connection_child(UserPid, Role, Socket, Options) -> - Sups = proplists:get_value(supervisors, Options), +start_the_connection_child(UserPid, Role, Socket, Options0) -> + Sups = ?GET_INTERNAL_OPT(supervisors, Options0), ConnectionSup = proplists:get_value(connection_sup, Sups), - Opts = [{supervisors, Sups}, {user_pid, UserPid} | proplists:get_value(ssh_opts, Options, [])], - {ok, Pid} = ssh_connection_sup:start_child(ConnectionSup, [Role, Socket, Opts]), + Options = ?PUT_INTERNAL_OPT({user_pid,UserPid}, Options0), + {ok, Pid} = ssh_connection_sup:start_child(ConnectionSup, [Role, Socket, Options]), ok = socket_control(Socket, Pid, Options), Pid. @@ -1469,46 +1589,43 @@ peer_role(client) -> server; peer_role(server) -> client. %%-------------------------------------------------------------------- -%% StateName to Role -role({_,Role}) -> Role; -role({_,Role,_}) -> Role. - -%%-------------------------------------------------------------------- -%% Check the StateName to see if we are in the renegotiation phase -renegotiation({_,_,ReNeg}) -> ReNeg == renegotiation; -renegotiation(_) -> false. +available_hkey_algorithms(Role, Options) -> + KeyCb = ?GET_OPT(key_cb, Options), + case [A || A <- available_hkey_algos(Options), + (Role==client) orelse available_host_key(KeyCb, A, Options) + ] of + + [] when Role==client -> + error({shutdown, "No public key algs"}); + + [] when Role==server -> + error({shutdown, "No host key available"}); -%%-------------------------------------------------------------------- -supported_host_keys(client, _, Options) -> - try - case proplists:get_value(public_key, - proplists:get_value(preferred_algorithms,Options,[]) - ) of - undefined -> - ssh_transport:default_algorithms(public_key); - L -> - L -- (L--ssh_transport:default_algorithms(public_key)) - end - of - [] -> - {stop, {shutdown, "No public key algs"}}; Algs -> [atom_to_list(A) || A<-Algs] - catch - exit:Reason -> - {stop, {shutdown, Reason}} - end; -supported_host_keys(server, KeyCb, Options) -> - [atom_to_list(A) || A <- proplists:get_value(public_key, - proplists:get_value(preferred_algorithms,Options,[]), - ssh_transport:default_algorithms(public_key) - ), - available_host_key(KeyCb, A, Options) - ]. + end. + + +available_hkey_algos(Options) -> + SupAlgos = ssh_transport:supported_algorithms(public_key), + HKeys = proplists:get_value(public_key, + ?GET_OPT(preferred_algorithms,Options) + ), + NonSupported = HKeys -- SupAlgos, + AvailableAndSupported = HKeys -- NonSupported, + AvailableAndSupported. + %% Alg :: atom() -available_host_key(KeyCb, Alg, Opts) -> - element(1, catch KeyCb:host_key(Alg, Opts)) == ok. +available_host_key({KeyCb,KeyCbOpts}, Alg, Opts) -> + UserOpts = ?GET_OPT(user_options, Opts), + case KeyCb:host_key(Alg, [{key_cb_private,KeyCbOpts}|UserOpts]) of + {ok,Key} -> + %% Check the key - the KeyCb may be a buggy plugin + ssh_transport:valid_key_sha_alg(Key, Alg); + _ -> + false + end. send_msg(Msg, State=#data{ssh_params=Ssh0}) when is_tuple(Msg) -> @@ -1516,6 +1633,8 @@ send_msg(Msg, State=#data{ssh_params=Ssh0}) when is_tuple(Msg) -> send_bytes(Bytes, State), State#data{ssh_params=Ssh}. +send_bytes("", _D) -> + ok; send_bytes(Bytes, #data{socket = Socket, transport_cb = Transport}) -> _ = Transport:send(Socket, Bytes), ok. @@ -1622,23 +1741,84 @@ cache(#data{connection_state=C}) -> C#connection.channel_cache. %%%---------------------------------------------------------------- +handle_ssh_msg_ext_info(#ssh_msg_ext_info{}, D=#data{ssh_params = #ssh{recv_ext_info=false}} ) -> + % The peer sent this although we didn't allow it! + D; + +handle_ssh_msg_ext_info(#ssh_msg_ext_info{data=Data}, D0) -> + lists:foldl(fun ext_info/2, D0, Data). + + +ext_info({"server-sig-algs",SigAlgsStr}, + D0 = #data{ssh_params=#ssh{role=client, + userauth_pubkeys=ClientSigAlgs}=Ssh0}) -> + %% ClientSigAlgs are the pub_key algortithms that: + %% 1) is usable, that is, the user has such a public key and + %% 2) is either the default list or set by the caller + %% with the client option 'pref_public_key_algs' + %% + %% The list is already checked for duplicates. + + SigAlgs = [A || Astr <- string:tokens(SigAlgsStr, ","), + A <- try [list_to_existing_atom(Astr)] + %% list_to_existing_atom will fail for unknown algorithms + catch _:_ -> [] + end], + + CommonAlgs = [A || A <- SigAlgs, + lists:member(A, ClientSigAlgs)], + + %% Re-arrange the client supported public-key algorithms so that the server + %% preferred ones are tried first. + %% Trying algorithms not mentioned by the server is ok, since the server can't know + %% if the client supports 'server-sig-algs' or not. + + D0#data{ + ssh_params = + Ssh0#ssh{ + userauth_pubkeys = + CommonAlgs ++ (ClientSigAlgs -- CommonAlgs) + }}; + +ext_info(_, D0) -> + %% Not implemented + D0. + +%%%---------------------------------------------------------------- +is_usable_user_pubkey(A, Ssh) -> + case ssh_auth:get_public_key(A, Ssh) of + {ok,_} -> true; + _ -> false + end. + +%%%---------------------------------------------------------------- handle_request(ChannelPid, ChannelId, Type, Data, WantReply, From, D) -> case ssh_channel:cache_lookup(cache(D), ChannelId) of - #channel{remote_id = Id} = Channel -> + #channel{remote_id = Id, + sent_close = false} = Channel -> update_sys(cache(D), Channel, Type, ChannelPid), send_msg(ssh_connection:channel_request_msg(Id, Type, WantReply, Data), add_request(WantReply, ChannelId, From, D)); - undefined -> - D + + _ when WantReply==true -> + {error,closed}; + + _ -> + D end. handle_request(ChannelId, Type, Data, WantReply, From, D) -> case ssh_channel:cache_lookup(cache(D), ChannelId) of - #channel{remote_id = Id} -> + #channel{remote_id = Id, + sent_close = false} -> send_msg(ssh_connection:channel_request_msg(Id, Type, WantReply, Data), add_request(WantReply, ChannelId, From, D)); - undefined -> - D + + _ when WantReply==true -> + {error,closed}; + + _ -> + D end. %%%---------------------------------------------------------------- @@ -1765,47 +1945,24 @@ get_repl(X, Acc) -> exit({get_repl,X,Acc}). %%%---------------------------------------------------------------- -disconnect_fun({disconnect,Msg}, D) -> - disconnect_fun(Msg, D); -disconnect_fun(Reason, #data{opts=Opts}) -> - case proplists:get_value(disconnectfun, Opts) of - undefined -> - ok; - Fun -> - catch Fun(Reason) - end. - -unexpected_fun(UnexpectedMessage, #data{opts = Opts, - ssh_params = #ssh{peer = {_,Peer} } - } ) -> - case proplists:get_value(unexpectedfun, Opts) of - undefined -> - report; - Fun -> - catch Fun(UnexpectedMessage, Peer) - end. +-define(CALL_FUN(Key,D), catch (?GET_OPT(Key, (D#data.ssh_params)#ssh.opts)) ). + +disconnect_fun({disconnect,Msg}, D) -> ?CALL_FUN(disconnectfun,D)(Msg); +disconnect_fun(Reason, D) -> ?CALL_FUN(disconnectfun,D)(Reason). +unexpected_fun(UnexpectedMessage, #data{ssh_params = #ssh{peer = {_,Peer} }} = D) -> + ?CALL_FUN(unexpectedfun,D)(UnexpectedMessage, Peer). debug_fun(#ssh_msg_debug{always_display = Display, message = DbgMsg, language = Lang}, - #data{opts = Opts}) -> - case proplists:get_value(ssh_msg_debug_fun, Opts) of - undefined -> - ok; - Fun -> - catch Fun(self(), Display, DbgMsg, Lang) - end. + D) -> + ?CALL_FUN(ssh_msg_debug_fun,D)(self(), Display, DbgMsg, Lang). -connected_fun(User, Method, #data{ssh_params = #ssh{peer = {_,Peer}}, - opts = Opts}) -> - case proplists:get_value(connectfun, Opts) of - undefined -> - ok; - Fun -> - catch Fun(User, Peer, Method) - end. +connected_fun(User, Method, #data{ssh_params = #ssh{peer = {_,Peer}}} = D) -> + ?CALL_FUN(connectfun,D)(User, Peer, Method). + retry_fun(_, undefined, _) -> ok; @@ -1819,7 +1976,7 @@ retry_fun(User, Reason, #data{ssh_params = #ssh{opts = Opts, _ -> {infofun, Reason} end, - Fun = proplists:get_value(Tag, Opts, fun(_,_)-> ok end), + Fun = ?GET_OPT(Tag, Opts), try erlang:fun_info(Fun, arity) of {arity, 2} -> %% Backwards compatible @@ -1838,7 +1995,7 @@ retry_fun(User, Reason, #data{ssh_params = #ssh{opts = Opts, %%% channels open for a while. cache_init_idle_timer(D) -> - case proplists:get_value(idle_time, D#data.opts, infinity) of + case ?GET_OPT(idle_time, (D#data.ssh_params)#ssh.opts) of infinity -> D#data{idle_timer_value = infinity, idle_timer_ref = infinity % A flag used later... @@ -1901,9 +2058,8 @@ start_channel_request_timer(Channel, From, Time) -> %%% Connection start and initalization helpers socket_control(Socket, Pid, Options) -> - {_, TransportCallback, _} = % For example {_,gen_tcp,_} - proplists:get_value(transport, Options, ?DefaultTransport), - case TransportCallback:controlling_process(Socket, Pid) of + {_, Callback, _} = ?GET_OPT(transport, Options), + case Callback:controlling_process(Socket, Pid) of ok -> gen_statem:cast(Pid, socket_control); {error, Reason} -> @@ -1935,12 +2091,14 @@ handshake(Pid, Ref, Timeout) -> end. update_inet_buffers(Socket) -> - {ok, BufSzs0} = inet:getopts(Socket, [sndbuf,recbuf]), - MinVal = 655360, - case - [{Tag,MinVal} || {Tag,Val} <- BufSzs0, - Val < MinVal] + try + {ok, BufSzs0} = inet:getopts(Socket, [sndbuf,recbuf]), + MinVal = 655360, + [{Tag,MinVal} || {Tag,Val} <- BufSzs0, + Val < MinVal] of [] -> ok; NewOpts -> inet:setopts(Socket, NewOpts) + catch + _:_ -> ok end. |