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%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2004-2017. 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.
%% 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%
%%
%%% @doc Callback module for ct_telnet, for connecting to a telnet
%%% server on a unix host.
%%%
%%% <p>It requires the following entry in the config file:</p>
%%% <pre>
%%% {unix,[{telnet,HostNameOrIpAddress},
%%% {port,PortNum}, % optional
%%% {username,UserName},
%%% {password,Password},
%%% {keep_alive,Bool}, % optional
%%% {tcp_nodely,Bool}]} % optional</pre>
%%%
%%% <p>To communicate via telnet to the host specified by
%%% <code>HostNameOrIpAddress</code>, use the interface functions in
%%% <code>ct_telnet</code>, e.g. <code>open(Name), cmd(Name,Cmd), ...</code>.</p>
%%%
%%% <p><code>Name</code> is the name you allocated to the unix host in
%%% your <code>require</code> statement. E.g.</p>
%%% <pre> suite() -> [{require,Name,{unix,[telnet]}}].</pre>
%%% <p>or</p>
%%% <pre> ct:require(Name,{unix,[telnet]}).</pre>
%%%
%%% <p>The "keep alive" activity (i.e. that Common Test sends NOP to the server
%%% every 10 seconds if the connection is idle) may be enabled or disabled for one
%%% particular connection as described here. It may be disabled for all connections
%%% using <c>telnet_settings</c> (see <c>ct_telnet</c>).</p>
%%%
%%% <p>Note that the <code>{port,PortNum}</code> tuple is optional and if
%%% omitted, default telnet port 23 will be used. Also the <c>keep_alive</c> tuple
%%% is optional, and the value defauls to true (enabled).</p>
%%%
%%% @see ct
%%% @see ct_telnet
-module(unix_telnet).
%% Callbacks for ct_telnet.erl
-export([connect/7,get_prompt_regexp/0]).
-import(ct_telnet,[start_gen_log/1,log/4,end_gen_log/0]).
-define(username,"login: ").
-define(password,"Password: ").
-define(prx,"login: |Password: |\\\$ |> ").
%%%-----------------------------------------------------------------
%%% @spec get_prompt_regexp() -> PromptRegexp
%%% PromptRegexp = ct_telnet:prompt_regexp()
%%%
%%% @doc Callback for ct_telnet.erl.
%%%
%%% <p>Return a suitable regexp string that will match common
%%% prompts for users on unix hosts.</p>
get_prompt_regexp() ->
?prx.
%%%-----------------------------------------------------------------
%%% @spec connect(ConnName,Ip,Port,Timeout,KeepAlive,Extra) ->
%%% {ok,Handle} | {error,Reason}
%%% ConnName = ct:target_name()
%%% Ip = string() | {integer(),integer(),integer(),integer()}
%%% Port = integer()
%%% Timeout = integer()
%%% KeepAlive = bool()
%%% TCPNoDelay = bool()
%%% Extra = ct:target_name() | {Username,Password}
%%% Username = string()
%%% Password = string()
%%% Handle = ct_telnet:handle()
%%% Reason = term()
%%%
%%% @doc Callback for ct_telnet.erl.
%%%
%%% <p>Setup telnet connection to a unix host.</p>
connect(ConnName,Ip,Port,Timeout,KeepAlive,TCPNoDelay,Extra) ->
case Extra of
{Username,Password} ->
connect1(ConnName,Ip,Port,Timeout,KeepAlive,TCPNoDelay,
Username,Password);
KeyOrName ->
case get_username_and_password(KeyOrName) of
{ok,{Username,Password}} ->
connect1(ConnName,Ip,Port,Timeout,KeepAlive,TCPNoDelay,
Username,Password);
Error ->
Error
end
end.
connect1(Name,Ip,Port,Timeout,KeepAlive,TCPNoDelay,Username,Password) ->
start_gen_log("unix_telnet connect"),
Result =
case ct_telnet_client:open(Ip,Port,Timeout,KeepAlive,TCPNoDelay,Name) of
{ok,Pid} ->
case ct_telnet:silent_teln_expect(Name,Pid,[],
[prompt],?prx,[]) of
{ok,{prompt,?username},_} ->
log(Name,send,"Logging in to ~p:~p", [Ip,Port]),
ok = ct_telnet_client:send_data(Pid,Username),
log(Name,send,"Username: ~ts",[Username]),
case ct_telnet:silent_teln_expect(Name,Pid,[],
prompt,?prx,[]) of
{ok,{prompt,?password},_} ->
ok = ct_telnet_client:send_data(Pid,Password),
Stars = lists:duplicate(length(Password),$*),
log(Name,send,"Password: ~s",[Stars]),
% ok = ct_telnet_client:send_data(Pid,""),
case ct_telnet:silent_teln_expect(Name,Pid,[],
prompt,
?prx,[]) of
{ok,{prompt,Prompt},_}
when Prompt=/=?username,
Prompt=/=?password ->
{ok,Pid};
Error ->
log(Name,recv,"Password failed\n~tp\n",
[Error]),
{error,Error}
end;
Error ->
log(Name,recv,"Login to ~p:~p failed\n~tp\n",[Ip,Port,Error]),
{error,Error}
end;
{ok,[{prompt,_OtherPrompt1},{prompt,_OtherPrompt2}],_} ->
{ok,Pid};
Error ->
log(Name,conn_error,
"Did not get expected prompt from ~p:~p\n~tp\n",
[Ip,Port,Error]),
{error,Error}
end;
Error ->
log(Name,conn_error,
"Could not open telnet connection to ~p:~p\n~tp\n",
[Ip,Port,Error]),
Error
end,
end_gen_log(),
Result.
get_username_and_password(Name) ->
case ct:get_config({Name,username}) of
undefined ->
{error,{no_username,Name}};
Username ->
case ct:get_config({Name,password}) of
undefined ->
{error,{no_password,Name}};
Password ->
{ok,{Username,Password}}
end
end.
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