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authorHans Nilsson <[email protected]>2016-06-01 19:54:35 +0200
committerHans Nilsson <[email protected]>2016-06-01 19:54:35 +0200
commit2f0d43a9da600a3835b9dbbb20eeaf43565363f6 (patch)
tree4241e90fcd7584f35b2d5cf24f72e0e72b387317 /lib/ssh/src
parent3b769cfe66b81467d756fe670fe25e2fd984fdba (diff)
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ssh: better validation
Diffstat (limited to 'lib/ssh/src')
-rw-r--r--lib/ssh/src/ssh.erl74
1 files changed, 46 insertions, 28 deletions
diff --git a/lib/ssh/src/ssh.erl b/lib/ssh/src/ssh.erl
index fa2354a3df..65f1acc6a6 100644
--- a/lib/ssh/src/ssh.erl
+++ b/lib/ssh/src/ssh.erl
@@ -86,29 +86,19 @@ connect(Socket, Options) ->
connect(Socket, Options, Timeout) when is_port(Socket) ->
case handle_options(Options) of
- {error, _Reason} = Error ->
- Error;
+ {error, Error} ->
+ {error, Error};
{_SocketOptions, SshOptions} ->
- case proplists:get_value(transport, Options, {tcp, gen_tcp, tcp_closed}) of
- {tcp,_,_} ->
- %% Is the socket a valid tcp socket?
- case {{ok,[]} =/= inet:getopts(Socket, [delay_send]),
- {ok,[{active,false}]} == inet:getopts(Socket, [active])
- }
- of
- {true, true} ->
- {ok, {Host,_Port}} = inet:sockname(Socket),
- Opts = [{user_pid,self()}, {host,fmt_host(Host)} | SshOptions],
- ssh_connection_handler:start_connection(client, Socket, Opts, Timeout);
- {true, false} ->
- {error, not_passive_mode};
- _ ->
- {error, not_tcp_socket}
- end;
- {L4,_,_} ->
- {error, {unsupported,L4}}
+ case valid_socket_to_use(Socket, Options) of
+ ok ->
+ {ok, {Host,_Port}} = inet:sockname(Socket),
+ Opts = [{user_pid,self()}, {host,fmt_host(Host)} | SshOptions],
+ ssh_connection_handler:start_connection(client, Socket, Opts, Timeout);
+ {error,SockError} ->
+ {error,SockError}
end
end;
+
connect(Host, Port, Options) when is_integer(Port), Port>0 ->
connect(Host, Port, Options, infinity).
@@ -272,6 +262,29 @@ default_algorithms() ->
%%--------------------------------------------------------------------
%%% Internal functions
%%--------------------------------------------------------------------
+valid_socket_to_use(Socket, Options) ->
+ case proplists:get_value(transport, Options, {tcp, gen_tcp, tcp_closed}) of
+ {tcp,_,_} ->
+ %% Is this tcp-socket a valid socket?
+ case {is_tcp_socket(Socket),
+ {ok,[{active,false}]} == inet:getopts(Socket, [active])
+ }
+ of
+ {true, true} ->
+ ok;
+ {true, false} ->
+ {error, not_passive_mode};
+ _ ->
+ {error, not_tcp_socket}
+ end;
+ {L4,_,_} ->
+ {error, {unsupported,L4}}
+ end.
+
+is_tcp_socket(Socket) -> {ok,[]} =/= inet:getopts(Socket, [delay_send]).
+
+
+
daemon_shell_opt(Options) ->
case proplists:get_value(shell, Options) of
undefined ->
@@ -296,14 +309,19 @@ daemon_host_inet_opt(HostAddr, Options1) ->
start_daemon(Socket, Options) ->
case handle_options(Options) of
- {error, _Reason} = Error ->
- Error;
- {SocketOptions, SshOptions}->
- try
- do_start_daemon(Socket, [{role,server}|SshOptions], SocketOptions)
- catch
- throw:bad_fd -> {error,bad_fd};
- _C:_E -> {error,{cannot_start_daemon,_C,_E}}
+ {error, Error} ->
+ {error, Error};
+ {SocketOptions, SshOptions} ->
+ case valid_socket_to_use(Socket, Options) of
+ ok ->
+ try
+ do_start_daemon(Socket, [{role,server}|SshOptions], SocketOptions)
+ catch
+ throw:bad_fd -> {error,bad_fd};
+ _C:_E -> {error,{cannot_start_daemon,_C,_E}}
+ end;
+ {error,SockError} ->
+ {error,SockError}
end
end.