%% %% %CopyrightBegin% %% %% Copyright Ericsson AB 1997-2010. 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 %% compliance with the License. You should have received a copy of the %% Erlang Public License along with this software. If not, it can be %% retrieved online at http://www.erlang.org/. %% %% Software distributed under the License is distributed on an "AS IS" %% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See %% the License for the specific language governing rights and limitations %% under the License. %% %% %CopyrightEnd% %% %% %% Description: This module implements an ftp client, RFC 959. %% It also supports ipv6 RFC 2428. -module(ftp). -behaviour(gen_server). -behaviour(inets_service). %% API - Client interface -export([cd/2, close/1, delete/2, formaterror/1, lcd/2, lpwd/1, ls/1, ls/2, mkdir/2, nlist/1, nlist/2, open/1, open/2, pwd/1, quote/2, recv/2, recv/3, recv_bin/2, recv_chunk_start/2, recv_chunk/1, rename/3, rmdir/2, send/2, send/3, send_bin/3, send_chunk_start/2, send_chunk/2, send_chunk_end/1, type/2, user/3, user/4, account/2, append/3, append/2, append_bin/3, append_chunk/2, append_chunk_end/1, append_chunk_start/2, info/1]). %% gen_server callbacks -export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, code_change/3]). %% supervisor callbacks -export([start_link/1, start_link/2]). %% Behavior callbacks -export([start_standalone/1, start_service/1, stop_service/1, services/0, service_info/1]). -include("ftp_internal.hrl"). %% Constante used in internal state definition -define(CONNECTION_TIMEOUT, 60*1000). -define(DEFAULT_MODE, passive). -define(PROGRESS_DEFAULT, ignore). %% Internal Constants -define(FTP_PORT, 21). -define(FILE_BUFSIZE, 4096). %% Internal state -record(state, { csock = undefined, % socket() - Control connection socket dsock = undefined, % socket() - Data connection socket verbose = false, % boolean() ldir = undefined, % string() - Current local directory type = ftp_server_default, % atom() - binary | ascii chunk = false, % boolean() - Receiving data chunks mode = ?DEFAULT_MODE, % passive | active timeout = ?CONNECTION_TIMEOUT, % integer() %% Data received so far on the data connection data = <<>>, % binary() %% Data received so far on the control connection %% {BinStream, AccLines}. If a binary sequence %% ends with ?CR then keep it in the binary to %% be able to detect if the next received byte is ?LF %% and hence the end of the response is reached! ctrl_data = {<<>>, [], start}, % {binary(), [bytes()], LineStatus} %% pid() - Client pid (note not the same as "From") owner = undefined, client = undefined, % "From" to be used in gen_server:reply/2 %% Function that activated a connection and maybe some %% data needed further on. caller = undefined, % term() ipfamily, % inet | inet6 | inet6fb4 progress = ignore % ignore | pid() }). %%%========================================================================= %%% API - CLIENT FUNCTIONS %%%========================================================================= %%-------------------------------------------------------------------------- %% open(HostOrOtpList, <Port>, <Flags>) -> {ok, Pid} | {error, ehost} %% HostOrOtpList = string() | [{option_list, Options}] %% Port = integer(), %% Flags = [Flag], %% Flag = verbose | debug | trace %% %% Description: Start an ftp client and connect to a host. %%-------------------------------------------------------------------------- %% <BACKWARD-COMPATIBILLITY> open({option_list, Options}) when is_list(Options) -> try {ok, StartOptions} = start_options(Options), {ok, OpenOptions} = open_options(Options), case ftp_sup:start_child([[[{client, self()} | StartOptions], []]]) of {ok, Pid} -> call(Pid, {open, ip_comm, OpenOptions}, plain); Error1 -> Error1 end catch throw:Error2 -> Error2 end; %% </BACKWARD-COMPATIBILLITY> open(Host) -> open(Host, []). %% <BACKWARD-COMPATIBILLITY> open(Host, Port) when is_integer(Port) -> open(Host, [{port, Port}]); %% </BACKWARD-COMPATIBILLITY> open(Host, Opts) when is_list(Opts) -> ?fcrt("open", [{host, Host}, {opts, Opts}]), try {ok, StartOptions} = start_options(Opts), ?fcrt("open", [{start_options, StartOptions}]), {ok, OpenOptions} = open_options([{host, Host}|Opts]), ?fcrt("open", [{open_options, OpenOptions}]), case start_link(StartOptions, []) of {ok, Pid} -> ?fcrt("open - ok", [{pid, Pid}]), call(Pid, {open, ip_comm, OpenOptions}, plain); Error1 -> ?fcrt("open - error", [{error1, Error1}]), Error1 end catch throw:Error2 -> ?fcrt("open - error", [{error2, Error2}]), Error2 end. %%-------------------------------------------------------------------------- %% user(Pid, User, Pass, <Acc>) -> ok | {error, euser} | {error, econn} %% | {error, eacct} %% Pid = pid(), %% User = Pass = Acc = string() %% %% Description: Login with or without a supplied account name. %%-------------------------------------------------------------------------- user(Pid, User, Pass) -> call(Pid, {user, User, Pass}, atom). user(Pid, User, Pass, Acc) -> call(Pid, {user, User, Pass, Acc}, atom). %%-------------------------------------------------------------------------- %% account(Pid, Acc) -> ok | {error, eacct} %% Pid = pid() %% Acc= string() %% %% Description: Set a user Account. %%-------------------------------------------------------------------------- account(Pid, Acc) -> call(Pid, {account, Acc}, atom). %%-------------------------------------------------------------------------- %% pwd(Pid) -> {ok, Dir} | {error, elogin} | {error, econn} %% Pid = pid() %% Dir = string() %% %% Description: Get the current working directory at remote server. %%-------------------------------------------------------------------------- pwd(Pid) -> call(Pid, pwd, ctrl). %%-------------------------------------------------------------------------- %% lpwd(Pid) -> {ok, Dir} | {error, elogin} %% Pid = pid() %% Dir = string() %% %% Description: Get the current working directory at local server. %%-------------------------------------------------------------------------- lpwd(Pid) -> call(Pid, lpwd, string). %%-------------------------------------------------------------------------- %% cd(Pid, Dir) -> ok | {error, epath} | {error, elogin} | {error, econn} %% Pid = pid() %% Dir = string() %% %% Description: Change current working directory at remote server. %%-------------------------------------------------------------------------- cd(Pid, Dir) -> call(Pid, {cd, Dir}, atom). %%-------------------------------------------------------------------------- %% lcd(Pid, Dir) -> ok | {error, epath} %% Pid = pid() %% Dir = string() %% %% Description: Change current working directory for the local client. %%-------------------------------------------------------------------------- lcd(Pid, Dir) -> call(Pid, {lcd, Dir}, string). %%-------------------------------------------------------------------------- %% ls(Pid) -> Result %% ls(Pid, <Dir>) -> Result %% %% Pid = pid() %% Dir = string() %% Result = {ok, Listing} | {error, Reason} %% Listing = string() %% Reason = epath | elogin | econn %% %% Description: Returns a list of files in long format. %%-------------------------------------------------------------------------- ls(Pid) -> ls(Pid, ""). ls(Pid, Dir) -> call(Pid, {dir, long, Dir}, string). %%-------------------------------------------------------------------------- %% nlist(Pid) -> Result %% nlist(Pid, Pathname) -> Result %% %% Pid = pid() %% Pathname = string() %% Result = {ok, Listing} | {error, Reason} %% Listing = string() %% Reason = epath | elogin | econn %% %% Description: Returns a list of files in short format %%-------------------------------------------------------------------------- nlist(Pid) -> nlist(Pid, ""). nlist(Pid, Dir) -> call(Pid, {dir, short, Dir}, string). %%-------------------------------------------------------------------------- %% rename(Pid, CurrFile, NewFile) -> ok | {error, epath} | {error, elogin} %% | {error, econn} %% Pid = pid() %% CurrFile = NewFile = string() %% %% Description: Rename a file at remote server. %%-------------------------------------------------------------------------- rename(Pid, CurrFile, NewFile) -> call(Pid, {rename, CurrFile, NewFile}, string). %%-------------------------------------------------------------------------- %% delete(Pid, File) -> ok | {error, epath} | {error, elogin} | %% {error, econn} %% Pid = pid() %% File = string() %% %% Description: Remove file at remote server. %%-------------------------------------------------------------------------- delete(Pid, File) -> call(Pid, {delete, File}, string). %%-------------------------------------------------------------------------- %% mkdir(Pid, Dir) -> ok | {error, epath} | {error, elogin} | {error, econn} %% Pid = pid(), %% Dir = string() %% %% Description: Make directory at remote server. %%-------------------------------------------------------------------------- mkdir(Pid, Dir) -> call(Pid, {mkdir, Dir}, atom). %%-------------------------------------------------------------------------- %% rmdir(Pid, Dir) -> ok | {error, epath} | {error, elogin} | {error, econn} %% Pid = pid(), %% Dir = string() %% %% Description: Remove directory at remote server. %%-------------------------------------------------------------------------- rmdir(Pid, Dir) -> call(Pid, {rmdir, Dir}, atom). %%-------------------------------------------------------------------------- %% type(Pid, Type) -> ok | {error, etype} | {error, elogin} | {error, econn} %% Pid = pid() %% Type = ascii | binary %% %% Description: Set transfer type. %%-------------------------------------------------------------------------- type(Pid, Type) -> call(Pid, {type, Type}, atom). %%-------------------------------------------------------------------------- %% recv(Pid, RemoteFileName <LocalFileName>) -> ok | {error, epath} | %% {error, elogin} | {error, econn} %% Pid = pid() %% RemoteFileName = LocalFileName = string() %% %% Description: Transfer file from remote server. %%-------------------------------------------------------------------------- recv(Pid, RemotFileName) -> recv(Pid, RemotFileName, RemotFileName). recv(Pid, RemotFileName, LocalFileName) -> call(Pid, {recv, RemotFileName, LocalFileName}, atom). %%-------------------------------------------------------------------------- %% recv_bin(Pid, RemoteFile) -> {ok, Bin} | {error, epath} | {error, elogin} %% | {error, econn} %% Pid = pid() %% RemoteFile = string() %% Bin = binary() %% %% Description: Transfer file from remote server into binary. %%-------------------------------------------------------------------------- recv_bin(Pid, RemoteFile) -> call(Pid, {recv_bin, RemoteFile}, bin). %%-------------------------------------------------------------------------- %% recv_chunk_start(Pid, RemoteFile) -> ok | {error, elogin} | {error, epath} %% | {error, econn} %% Pid = pid() %% RemoteFile = string() %% %% Description: Start receive of chunks of remote file. %%-------------------------------------------------------------------------- recv_chunk_start(Pid, RemoteFile) -> call(Pid, {recv_chunk_start, RemoteFile}, atom). %%-------------------------------------------------------------------------- %% recv_chunk(Pid, RemoteFile) -> ok | {ok, Bin} | {error, Reason} %% Pid = pid() %% RemoteFile = string() %% %% Description: Transfer file from remote server into binary in chunks %%-------------------------------------------------------------------------- recv_chunk(Pid) -> call(Pid, recv_chunk, atom). %%-------------------------------------------------------------------------- %% send(Pid, LocalFileName <RemotFileName>) -> ok | {error, epath} %% | {error, elogin} %% | {error, econn} %% Pid = pid() %% LocalFileName = RemotFileName = string() %% %% Description: Transfer file to remote server. %%-------------------------------------------------------------------------- send(Pid, LocalFileName) -> send(Pid, LocalFileName, LocalFileName). send(Pid, LocalFileName, RemotFileName) -> call(Pid, {send, LocalFileName, RemotFileName}, atom). %%-------------------------------------------------------------------------- %% send_bin(Pid, Bin, RemoteFile) -> ok | {error, epath} | {error, elogin} %% | {error, enotbinary} | {error, econn} %% Pid = pid() %% Bin = binary() %% RemoteFile = string() %% %% Description: Transfer a binary to a remote file. %%-------------------------------------------------------------------------- send_bin(Pid, Bin, RemoteFile) when is_binary(Bin) -> call(Pid, {send_bin, Bin, RemoteFile}, atom); send_bin(_Pid, _Bin, _RemoteFile) -> {error, enotbinary}. %%-------------------------------------------------------------------------- %% send_chunk_start(Pid, RemoteFile) -> ok | {error, elogin} | {error, epath} %% | {error, econn} %% Pid = pid() %% RemoteFile = string() %% %% Description: Start transfer of chunks to remote file. %%-------------------------------------------------------------------------- send_chunk_start(Pid, RemoteFile) -> call(Pid, {send_chunk_start, RemoteFile}, atom). %%-------------------------------------------------------------------------- %% append_chunk_start(Pid, RemoteFile) -> ok | {error, elogin} | %% {error, epath} | {error, econn} %% Pid = pid() %% RemoteFile = string() %% %% Description: Start append chunks of data to remote file. %%-------------------------------------------------------------------------- append_chunk_start(Pid, RemoteFile) -> call(Pid, {append_chunk_start, RemoteFile}, atom). %%-------------------------------------------------------------------------- %% send_chunk(Pid, Bin) -> ok | {error, elogin} | {error, enotbinary} %% | {error, echunk} | {error, econn} %% Pid = pid() %% Bin = binary(). %% %% Purpose: Send chunk to remote file. %%-------------------------------------------------------------------------- send_chunk(Pid, Bin) when is_binary(Bin) -> call(Pid, {transfer_chunk, Bin}, atom); send_chunk(_Pid, _Bin) -> {error, enotbinary}. %%-------------------------------------------------------------------------- %% append_chunk(Pid, Bin) -> ok | {error, elogin} | {error, enotbinary} %% | {error, echunk} | {error, econn} %% Pid = pid() %% Bin = binary() %% %% Description: Append chunk to remote file. %%-------------------------------------------------------------------------- append_chunk(Pid, Bin) when is_binary(Bin) -> call(Pid, {transfer_chunk, Bin}, atom); append_chunk(_Pid, _Bin) -> {error, enotbinary}. %%-------------------------------------------------------------------------- %% send_chunk_end(Pid) -> ok | {error, elogin} | {error, echunk} %% | {error, econn} %% Pid = pid() %% %% Description: End sending of chunks to remote file. %%-------------------------------------------------------------------------- send_chunk_end(Pid) -> call(Pid, chunk_end, atom). %%-------------------------------------------------------------------------- %% append_chunk_end(Pid) -> ok | {error, elogin} | {error, echunk} %% | {error, econn} %% Pid = pid() %% %% Description: End appending of chunks to remote file. %%-------------------------------------------------------------------------- append_chunk_end(Pid) -> call(Pid, chunk_end, atom). %%-------------------------------------------------------------------------- %% append(Pid, LocalFileName, RemotFileName) -> ok | {error, epath} %% | {error, elogin} | {error, econn} %% Pid = pid() %% LocalFileName = RemotFileName = string() %% %% Description: Append the local file to the remote file %%-------------------------------------------------------------------------- append(Pid, LocalFileName) -> append(Pid, LocalFileName, LocalFileName). append(Pid, LocalFileName, RemotFileName) -> call(Pid, {append, LocalFileName, RemotFileName}, atom). %%-------------------------------------------------------------------------- %% append_bin(Pid, Bin, RemoteFile) -> ok | {error, epath} | {error, elogin} %% | {error, enotbinary} | {error, econn} %% Pid = pid() %% Bin = binary() %% RemoteFile = string() %% %% Purpose: Append a binary to a remote file. %%-------------------------------------------------------------------------- append_bin(Pid, Bin, RemoteFile) when is_binary(Bin) -> call(Pid, {append_bin, Bin, RemoteFile}, atom); append_bin(_Pid, _Bin, _RemoteFile) -> {error, enotbinary}. %%-------------------------------------------------------------------------- %% quote(Pid, Cmd) -> ok %% Pid = pid() %% Cmd = string() %% %% Description: Send arbitrary ftp command. %%-------------------------------------------------------------------------- quote(Pid, Cmd) when is_list(Cmd) -> call(Pid, {quote, Cmd}, atom). %%-------------------------------------------------------------------------- %% close(Pid) -> ok %% Pid = pid() %% %% Description: End the ftp session. %%-------------------------------------------------------------------------- close(Pid) -> cast(Pid, close), ok. %%-------------------------------------------------------------------------- %% formaterror(Tag) -> string() %% Tag = atom() | {error, atom()} %% %% Description: Return diagnostics. %%-------------------------------------------------------------------------- formaterror(Tag) -> ftp_response:error_string(Tag). info(Pid) -> call(Pid, info, list). %%%======================================================================== %%% Behavior callbacks %%%======================================================================== start_standalone(Options) -> try {ok, StartOptions} = start_options(Options), {ok, OpenOptions} = open_options(Options), case start_link(StartOptions, []) of {ok, Pid} -> call(Pid, {open, ip_comm, OpenOptions}, plain); Error1 -> Error1 end catch throw:Error2 -> Error2 end. start_service(Options) -> try {ok, StartOptions} = start_options(Options), {ok, OpenOptions} = open_options(Options), case ftp_sup:start_child([[[{client, self()} | StartOptions], []]]) of {ok, Pid} -> call(Pid, {open, ip_comm, OpenOptions}, plain); Error1 -> Error1 end catch throw:Error2 -> Error2 end. stop_service(Pid) -> close(Pid). services() -> [{ftpc, Pid} || {_, Pid, _, _} <- supervisor:which_children(ftp_sup)]. service_info(Pid) -> {ok, Info} = call(Pid, info, list), {ok, [proplists:lookup(mode, Info), proplists:lookup(local_port, Info), proplists:lookup(peer, Info), proplists:lookup(peer_port, Info)]}. %% This function extracts the start options from the %% Valid options: %% debug, %% verbose %% ipfamily %% priority %% flags (for backward compatibillity) start_options(Options) -> ?fcrt("start_options", [{options, Options}]), case lists:keysearch(flags, 1, Options) of {value, {flags, Flags}} -> Verbose = lists:member(verbose, Flags), IsTrace = lists:member(trace, Flags), IsDebug = lists:member(debug, Flags), DebugLevel = if (IsTrace =:= true) -> trace; IsDebug =:= true -> debug; true -> disable end, {ok, [{verbose, Verbose}, {debug, DebugLevel}, {priority, low}]}; false -> ValidateVerbose = fun(true) -> true; (false) -> true; (_) -> false end, ValidateDebug = fun(trace) -> true; (debug) -> true; (disable) -> true; (_) -> false end, ValidatePriority = fun(low) -> true; (normal) -> true; (high) -> true; (_) -> false end, ValidOptions = [{verbose, ValidateVerbose, false, false}, {debug, ValidateDebug, false, disable}, {priority, ValidatePriority, false, low}], validate_options(Options, ValidOptions, []) end. %% This function extracts and validates the open options from the %% Valid options: %% mode %% host %% port %% timeout %% progress open_options(Options) -> ?fcrt("open_options", [{options, Options}]), ValidateMode = fun(active) -> true; (passive) -> true; (_) -> false end, ValidateHost = fun(Host) when is_list(Host) -> true; (Host) when is_tuple(Host) andalso ((size(Host) =:= 4) orelse (size(Host) =:= 8)) -> true; (_) -> false end, ValidatePort = fun(Port) when is_integer(Port) andalso (Port > 0) -> true; (_) -> false end, ValidateIpFamily = fun(inet) -> true; (inet6) -> true; (inet6fb4) -> true; (_) -> false end, ValidateTimeout = fun(Timeout) when is_integer(Timeout) andalso (Timeout > 0) -> true; (_) -> false end, ValidateProgress = fun(ignore) -> true; ({Mod, Func, _InitProgress}) when is_atom(Mod) andalso is_atom(Func) -> true; (_) -> false end, ValidOptions = [{mode, ValidateMode, false, ?DEFAULT_MODE}, {host, ValidateHost, true, ehost}, {port, ValidatePort, false, ?FTP_PORT}, {ipfamily, ValidateIpFamily, false, inet}, {timeout, ValidateTimeout, false, ?CONNECTION_TIMEOUT}, {progress, ValidateProgress, false, ?PROGRESS_DEFAULT}], validate_options(Options, ValidOptions, []). validate_options([], [], Acc) -> ?fcrt("validate_options -> done", [{acc, Acc}]), {ok, lists:reverse(Acc)}; validate_options([], ValidOptions, Acc) -> ?fcrt("validate_options -> done", [{valid_options, ValidOptions}, {acc, Acc}]), %% Check if any mandatory options are missing! case [{Key, Reason} || {Key, _, true, Reason} <- ValidOptions] of [] -> Defaults = [{Key, Default} || {Key, _, _, Default} <- ValidOptions], {ok, lists:reverse(Defaults ++ Acc)}; [{_, Reason}|_Missing] -> throw({error, Reason}) end; validate_options([{Key, Value}|Options], ValidOptions, Acc) -> ?fcrt("validate_options -> check", [{key, Key}, {value, Value}, {acc, Acc}]), case lists:keysearch(Key, 1, ValidOptions) of {value, {Key, Validate, _, Default}} -> case (catch Validate(Value)) of true -> ?fcrt("validate_options -> check - accept", []), NewValidOptions = lists:keydelete(Key, 1, ValidOptions), validate_options(Options, NewValidOptions, [{Key, Value} | Acc]); _ -> ?fcrt("validate_options -> check - reject", [{default, Default}]), NewValidOptions = lists:keydelete(Key, 1, ValidOptions), validate_options(Options, NewValidOptions, [{Key, Default} | Acc]) end; false -> validate_options(Options, ValidOptions, Acc) end; validate_options([_|Options], ValidOptions, Acc) -> validate_options(Options, ValidOptions, Acc). %%%======================================================================== %%% gen_server callback functions %%%======================================================================== %%------------------------------------------------------------------------- %% init(Args) -> {ok, State} | {ok, State, Timeout} | {stop, Reason} %% Description: Initiates the erlang process that manages a ftp connection. %%------------------------------------------------------------------------- init(Options) -> process_flag(trap_exit, true), %% Keep track of the client {value, {client, Client}} = lists:keysearch(client, 1, Options), erlang:monitor(process, Client), %% Make sure inet is started inet_db:start(), %% Where are we {ok, Dir} = file:get_cwd(), %% Maybe activate dbg case key_search(debug, Options, disable) of trace -> dbg:tracer(), dbg:p(all, [call]), dbg:tpl(ftp, [{'_', [], [{return_trace}]}]), dbg:tpl(ftp_response, [{'_', [], [{return_trace}]}]), dbg:tpl(ftp_progress, [{'_', [], [{return_trace}]}]); debug -> dbg:tracer(), dbg:p(all, [call]), dbg:tp(ftp, [{'_', [], [{return_trace}]}]), dbg:tp(ftp_response, [{'_', [], [{return_trace}]}]), dbg:tp(ftp_progress, [{'_', [], [{return_trace}]}]); _ -> %% Keep silent ok end, %% Verbose? Verbose = key_search(verbose, Options, false), %% IpFamily? IpFamily = key_search(ipfamily, Options, inet), State = #state{owner = Client, verbose = Verbose, ipfamily = IpFamily, ldir = Dir}, %% Set process prio Priority = key_search(priority, Options, low), process_flag(priority, Priority), %% And we are done {ok, State}. %%-------------------------------------------------------------------------- %% handle_call(Request, From, State) -> {reply, Reply, State} | %% {reply, Reply, State, Timeout} | %% {noreply, State} | %% {noreply, State, Timeout} | %% {stop, Reason, Reply, State} | %% Description: Handle incoming requests. %%------------------------------------------------------------------------- %% Anyone can ask this question handle_call({_, info}, _, #state{verbose = Verbose, mode = Mode, timeout = Timeout, ipfamily = IpFamily, csock = Socket, progress = Progress} = State) -> {ok, {_, LocalPort}} = inet:sockname(Socket), {ok, {Address, Port}} = inet:peername(Socket), Options = [{verbose, Verbose}, {ipfamily, IpFamily}, {mode, Mode}, {peer, Address}, {peer_port, Port}, {local_port, LocalPort}, {timeout, Timeout}, {progress, Progress}], {reply, {ok, Options}, State}; %% But everything else must come from the owner handle_call({Pid, _}, _, #state{owner = Owner} = State) when Owner =/= Pid -> {reply, {error, not_connection_owner}, State}; handle_call({_, {open, ip_comm, Opts}}, From, State) -> ?fcrd("handle_call(open)", [{opts, Opts}]), case key_search(host, Opts, undefined) of undefined -> {stop, normal, {error, ehost}, State}; Host -> Mode = key_search(mode, Opts, ?DEFAULT_MODE), Port = key_search(port, Opts, ?FTP_PORT), Timeout = key_search(timeout, Opts, ?CONNECTION_TIMEOUT), Progress = key_search(progress, Opts, ignore), State2 = State#state{client = From, mode = Mode, progress = progress(Progress)}, ?fcrd("handle_call(open) -> setup ctrl connection with", [{host, Host}, {port, Port}, {timeout, Timeout}]), case setup_ctrl_connection(Host, Port, Timeout, State2) of {ok, State3, WaitTimeout} -> ?fcrd("handle_call(open) -> ctrl connection setup done", [{waittimeout, WaitTimeout}]), {noreply, State3, WaitTimeout}; {error, Reason} -> ?fcrd("handle_call(open) -> ctrl connection setup failed", [{reason, Reason}]), gen_server:reply(From, {error, ehost}), {stop, normal, State2#state{client = undefined}} end end; handle_call({_, {open, ip_comm, Host, Opts}}, From, State) -> Mode = key_search(mode, Opts, ?DEFAULT_MODE), Port = key_search(port, Opts, ?FTP_PORT), Timeout = key_search(timeout, Opts, ?CONNECTION_TIMEOUT), Progress = key_search(progress, Opts, ignore), State2 = State#state{client = From, mode = Mode, progress = progress(Progress)}, case setup_ctrl_connection(Host, Port, Timeout, State2) of {ok, State3, WaitTimeout} -> {noreply, State3, WaitTimeout}; {error, _Reason} -> gen_server:reply(From, {error, ehost}), {stop, normal, State2#state{client = undefined}} end; handle_call({_, {user, User, Password}}, From, #state{csock = CSock} = State) when (CSock =/= undefined) -> handle_user(User, Password, "", State#state{client = From}); handle_call({_, {user, User, Password, Acc}}, From, #state{csock = CSock} = State) when (CSock =/= undefined) -> handle_user(User, Password, Acc, State#state{client = From}); handle_call({_, {account, Acc}}, From, State)-> handle_user_account(Acc, State#state{client = From}); handle_call({_, pwd}, From, #state{chunk = false} = State) -> send_ctrl_message(State, mk_cmd("PWD", [])), activate_ctrl_connection(State), {noreply, State#state{client = From, caller = pwd}}; handle_call({_, lpwd}, From, #state{ldir = LDir} = State) -> {reply, {ok, LDir}, State#state{client = From}}; handle_call({_, {cd, Dir}}, From, #state{chunk = false} = State) -> send_ctrl_message(State, mk_cmd("CWD ~s", [Dir])), activate_ctrl_connection(State), {noreply, State#state{client = From, caller = cd}}; handle_call({_,{lcd, Dir}}, _From, #state{ldir = LDir0} = State) -> LDir = filename:absname(Dir, LDir0), case file:read_file_info(LDir) of %% FIX better check that LDir is a dir. {ok, _ } -> {reply, ok, State#state{ldir = LDir}}; _ -> {reply, {error, epath}, State} end; handle_call({_, {dir, Len, Dir}}, {_Pid, _} = From, #state{chunk = false} = State) -> setup_data_connection(State#state{caller = {dir, Dir, Len}, client = From}); handle_call({_, {rename, CurrFile, NewFile}}, From, #state{chunk = false} = State) -> send_ctrl_message(State, mk_cmd("RNFR ~s", [CurrFile])), activate_ctrl_connection(State), {noreply, State#state{caller = {rename, NewFile}, client = From}}; handle_call({_, {delete, File}}, {_Pid, _} = From, #state{chunk = false} = State) -> send_ctrl_message(State, mk_cmd("DELE ~s", [File])), activate_ctrl_connection(State), {noreply, State#state{client = From}}; handle_call({_, {mkdir, Dir}}, From, #state{chunk = false} = State) -> send_ctrl_message(State, mk_cmd("MKD ~s", [Dir])), activate_ctrl_connection(State), {noreply, State#state{client = From}}; handle_call({_,{rmdir, Dir}}, From, #state{chunk = false} = State) -> send_ctrl_message(State, mk_cmd("RMD ~s", [Dir])), activate_ctrl_connection(State), {noreply, State#state{client = From}}; handle_call({_,{type, Type}}, From, #state{chunk = false} = State) -> case Type of ascii -> send_ctrl_message(State, mk_cmd("TYPE A", [])), activate_ctrl_connection(State), {noreply, State#state{caller = type, type = ascii, client = From}}; binary -> send_ctrl_message(State, mk_cmd("TYPE I", [])), activate_ctrl_connection(State), {noreply, State#state{caller = type, type = binary, client = From}}; _ -> {reply, {error, etype}, State} end; handle_call({_,{recv, RemoteFile, LocalFile}}, From, #state{chunk = false, ldir = LocalDir} = State) -> progress_report({remote_file, RemoteFile}, State), NewLocalFile = filename:absname(LocalFile, LocalDir), case file_open(NewLocalFile, write) of {ok, Fd} -> setup_data_connection(State#state{client = From, caller = {recv_file, RemoteFile, Fd}}); {error, _What} -> {reply, {error, epath}, State} end; handle_call({_, {recv_bin, RemoteFile}}, From, #state{chunk = false} = State) -> setup_data_connection(State#state{caller = {recv_bin, RemoteFile}, client = From}); handle_call({_,{recv_chunk_start, RemoteFile}}, From, #state{chunk = false} = State) -> setup_data_connection(State#state{caller = {start_chunk_transfer, "RETR", RemoteFile}, client = From}); handle_call({_, recv_chunk}, _, #state{chunk = false} = State) -> {reply, {error, "ftp:recv_chunk_start/2 not called"}, State}; handle_call({_, recv_chunk}, From, #state{chunk = true} = State) -> activate_data_connection(State), {noreply, State#state{client = From, caller = recv_chunk}}; handle_call({_, {send, LocalFile, RemoteFile}}, From, #state{chunk = false, ldir = LocalDir} = State) -> progress_report({local_file, filename:absname(LocalFile, LocalDir)}, State), setup_data_connection(State#state{caller = {transfer_file, {"STOR", LocalFile, RemoteFile}}, client = From}); handle_call({_, {append, LocalFile, RemoteFile}}, From, #state{chunk = false} = State) -> setup_data_connection(State#state{caller = {transfer_file, {"APPE", LocalFile, RemoteFile}}, client = From}); handle_call({_, {send_bin, Bin, RemoteFile}}, From, #state{chunk = false} = State) -> setup_data_connection(State#state{caller = {transfer_data, {"STOR", Bin, RemoteFile}}, client = From}); handle_call({_,{append_bin, Bin, RemoteFile}}, From, #state{chunk = false} = State) -> setup_data_connection(State#state{caller = {transfer_data, {"APPE", Bin, RemoteFile}}, client = From}); handle_call({_, {send_chunk_start, RemoteFile}}, From, #state{chunk = false} = State) -> setup_data_connection(State#state{caller = {start_chunk_transfer, "STOR", RemoteFile}, client = From}); handle_call({_, {append_chunk_start, RemoteFile}}, From, #state{chunk = false} = State) -> setup_data_connection(State#state{caller = {start_chunk_transfer, "APPE", RemoteFile}, client = From}); handle_call({_, {transfer_chunk, Bin}}, _, #state{chunk = true} = State) -> send_data_message(State, Bin), {reply, ok, State}; handle_call({_, chunk_end}, From, #state{chunk = true} = State) -> close_data_connection(State), activate_ctrl_connection(State), {noreply, State#state{client = From, dsock = undefined, caller = end_chunk_transfer, chunk = false}}; handle_call({_, {quote, Cmd}}, From, #state{chunk = false} = State) -> send_ctrl_message(State, mk_cmd(Cmd, [])), activate_ctrl_connection(State), {noreply, State#state{client = From, caller = quote}}; handle_call({_, _Req}, _From, #state{csock = CSock} = State) when (CSock =:= undefined) -> {reply, {error, not_connected}, State}; handle_call(_, _, #state{chunk = true} = State) -> {reply, {error, echunk}, State}; %% Catch all - This can only happen if the application programmer writes %% really bad code that violates the API. handle_call(Request, _Timeout, State) -> {stop, {'API_violation_connection_closed', Request}, {error, {connection_terminated, 'API_violation'}}, State}. %%-------------------------------------------------------------------------- %% handle_cast(Request, State) -> {noreply, State} | %% {noreply, State, Timeout} | %% {stop, Reason, State} %% Description: Handles cast messages. %%------------------------------------------------------------------------- handle_cast({Pid, close}, #state{owner = Pid} = State) -> send_ctrl_message(State, mk_cmd("QUIT", [])), close_ctrl_connection(State), close_data_connection(State), {stop, normal, State#state{csock = undefined, dsock = undefined}}; handle_cast({Pid, close}, State) -> Report = io_lib:format("A none owner process ~p tried to close an " "ftp connection: ~n", [Pid]), error_logger:info_report(Report), {noreply, State}; %% Catch all - This can oly happen if the application programmer writes %% really bad code that violates the API. handle_cast(Msg, State) -> {stop, {'API_violation_connection_closed', Msg}, State}. %%-------------------------------------------------------------------------- %% handle_info(Msg, State) -> {noreply, State} | {noreply, State, Timeout} | %% {stop, Reason, State} %% Description: Handles tcp messages from the ftp-server. %% Note: The order of the function clauses is significant. %%-------------------------------------------------------------------------- handle_info(timeout, #state{caller = open} = State) -> {stop, timeout, State}; handle_info(timeout, State) -> {noreply, State}; %%% Data socket messages %%% handle_info({tcp, Socket, Data}, #state{dsock = Socket, caller = {recv_file, Fd}} = State) -> file_write(binary_to_list(Data), Fd), progress_report({binary, Data}, State), activate_data_connection(State), {noreply, State}; handle_info({tcp, Socket, Data}, #state{dsock = Socket, client = From, caller = recv_chunk} = State) -> gen_server:reply(From, {ok, Data}), {noreply, State#state{client = undefined, data = <<>>}}; handle_info({tcp, Socket, Data}, #state{dsock = Socket} = State) -> activate_data_connection(State), {noreply, State#state{data = <<(State#state.data)/binary, Data/binary>>}}; handle_info({tcp_closed, Socket}, #state{dsock = Socket, caller = {recv_file, Fd}} = State) -> file_close(Fd), progress_report({transfer_size, 0}, State), activate_ctrl_connection(State), {noreply, State#state{dsock = undefined, data = <<>>}}; handle_info({tcp_closed, Socket}, #state{dsock = Socket, client = From, caller = recv_chunk} = State) -> gen_server:reply(From, ok), {noreply, State#state{dsock = undefined, client = undefined, data = <<>>, caller = undefined, chunk = false}}; handle_info({tcp_closed, Socket}, #state{dsock = Socket, caller = recv_bin, data = Data} = State) -> activate_ctrl_connection(State), {noreply, State#state{dsock = undefined, data = <<>>, caller = {recv_bin, Data}}}; handle_info({tcp_closed, Socket}, #state{dsock = Socket, data = Data, caller = {handle_dir_result, Dir}} = State) -> activate_ctrl_connection(State), {noreply, State#state{dsock = undefined, caller = {handle_dir_result, Dir, Data}, % data = <<?CR,?LF>>}}; data = <<>>}}; handle_info({tcp_error, Socket, Reason}, #state{dsock = Socket, client = From} = State) -> gen_server:reply(From, {error, Reason}), close_data_connection(State), {noreply, State#state{dsock = undefined, client = undefined, data = <<>>, caller = undefined, chunk = false}}; %%% Ctrl socket messages %%% handle_info({tcp, Socket, Data}, #state{csock = Socket, verbose = Verbose, caller = Caller, client = From, ctrl_data = {CtrlData, AccLines, LineStatus}} = State) -> case ftp_response:parse_lines(<<CtrlData/binary, Data/binary>>, AccLines, LineStatus) of {ok, Lines, NextMsgData} -> verbose(Lines, Verbose, 'receive'), CtrlResult = ftp_response:interpret(Lines), case Caller of quote -> gen_server:reply(From, string:tokens(Lines, [?CR, ?LF])), {noreply, State#state{client = undefined, caller = undefined, ctrl_data = {NextMsgData, [], start}}}; _ -> handle_ctrl_result(CtrlResult, State#state{ctrl_data = {NextMsgData, [], start}}) end; {continue, NewCtrlData} -> activate_ctrl_connection(State), {noreply, State#state{ctrl_data = NewCtrlData}} end; handle_info({tcp_closed, Socket}, #state{csock = Socket}) -> %% If the server closes the control channel it is %% the expected behavior that connection process terminates. exit(normal); %% User will get error message from terminate/2 handle_info({tcp_error, Socket, Reason}, _) -> Report = io_lib:format("tcp_error on socket: ~p for reason: ~p~n", [Socket, Reason]), error_logger:error_report(Report), %% If tcp does not work the only option is to terminate, %% this is the expected behavior under these circumstances. exit(normal); %% User will get error message from terminate/2 %% Monitor messages - if the process owning the ftp connection goes %% down there is no point in continuing. handle_info({'DOWN', _Ref, _Type, _Process, normal}, State) -> {stop, normal, State#state{client = undefined}}; handle_info({'DOWN', _Ref, _Type, _Process, shutdown}, State) -> {stop, normal, State#state{client = undefined}}; handle_info({'DOWN', _Ref, _Type, _Process, timeout}, State) -> {stop, normal, State#state{client = undefined}}; handle_info({'DOWN', _Ref, _Type, Process, Reason}, State) -> {stop, {stopped, {'EXIT', Process, Reason}}, State#state{client = undefined}}; handle_info({'EXIT', Pid, Reason}, #state{progress = Pid} = State) -> Report = io_lib:format("Progress reporting stopped for reason ~p~n", Reason), error_logger:info_report(Report), {noreply, State#state{progress = ignore}}; %% Catch all - throws away unknown messages (This could happen by "accident" %% so we do not want to crash, but we make a log entry as it is an %% unwanted behaviour.) handle_info(Info, State) -> Report = io_lib:format("ftp : ~p : Unexpected message: ~p\n", [self(), Info]), error_logger:info_report(Report), {noreply, State}. %%-------------------------------------------------------------------------- %% terminate/2 and code_change/3 %%-------------------------------------------------------------------------- terminate(normal, State) -> %% If terminate reason =/= normal the progress reporting process will %% be killed by the exit signal. progress_report(stop, State), do_termiante({error, econn}, State); terminate(Reason, State) -> Report = io_lib:format("Ftp connection closed due to: ~p~n", [Reason]), error_logger:error_report(Report), do_termiante({error, eclosed}, State). do_termiante(ErrorMsg, State) -> close_data_connection(State), close_ctrl_connection(State), case State#state.client of undefined -> ok; From -> gen_server:reply(From, ErrorMsg) end, ok. code_change(_Vsn, State1, upgrade_from_pre_5_12) -> {state, CSock, DSock, Verbose, LDir, Type, Chunk, Mode, Timeout, Data, CtrlData, Owner, Client, Caller, IPv6Disable, Progress} = State1, IpFamily = if (IPv6Disable =:= true) -> inet; true -> inet6fb4 end, State2 = #state{csock = CSock, dsock = DSock, verbose = Verbose, ldir = LDir, type = Type, chunk = Chunk, mode = Mode, timeout = Timeout, data = Data, ctrl_data = CtrlData, owner = Owner, client = Client, caller = Caller, ipfamily = IpFamily, progress = Progress}, {ok, State2}; code_change(_Vsn, State1, downgrade_to_pre_5_12) -> #state{csock = CSock, dsock = DSock, verbose = Verbose, ldir = LDir, type = Type, chunk = Chunk, mode = Mode, timeout = Timeout, data = Data, ctrl_data = CtrlData, owner = Owner, client = Client, caller = Caller, ipfamily = IpFamily, progress = Progress} = State1, IPv6Disable = if (IpFamily =:= inet) -> true; true -> false end, State2 = {state, CSock, DSock, Verbose, LDir, Type, Chunk, Mode, Timeout, Data, CtrlData, Owner, Client, Caller, IPv6Disable, Progress}, {ok, State2}; code_change(_Vsn, State, _Extra) -> {ok, State}. %%%========================================================================= %% Start/stop %%%========================================================================= %%-------------------------------------------------------------------------- %% start_link([Opts, GenServerOptions]) -> {ok, Pid} | {error, Reason} %% %% Description: Callback function for the ftp supervisor. It is called %% : when start_service/1 calls ftp_sup:start_child/1 to start an %% : instance of the ftp process. Also called by start_standalone/1 %%-------------------------------------------------------------------------- start_link([Opts, GenServerOptions]) -> start_link(Opts, GenServerOptions). start_link(Opts, GenServerOptions) -> case lists:keysearch(client, 1, Opts) of {value, _} -> %% Via the supervisor gen_server:start_link(?MODULE, Opts, GenServerOptions); false -> Opts2 = [{client, self()} | Opts], gen_server:start_link(?MODULE, Opts2, GenServerOptions) end. %%% Stop functionality is handled by close/1 %%%======================================================================== %%% Internal functions %%%======================================================================== %%-------------------------------------------------------------------------- %%% Help functions to handle_call and/or handle_ctrl_result %%-------------------------------------------------------------------------- %% User handling handle_user(User, Password, Acc, State) -> send_ctrl_message(State, mk_cmd("USER ~s", [User])), activate_ctrl_connection(State), {noreply, State#state{caller = {handle_user, Password, Acc}}}. handle_user_passwd(Password, Acc, State) -> send_ctrl_message(State, mk_cmd("PASS ~s", [Password])), activate_ctrl_connection(State), {noreply, State#state{caller = {handle_user_passwd, Acc}}}. handle_user_account(Acc, State) -> send_ctrl_message(State, mk_cmd("ACCT ~s", [Acc])), activate_ctrl_connection(State), {noreply, State#state{caller = handle_user_account}}. %%-------------------------------------------------------------------------- %% handle_ctrl_result %%-------------------------------------------------------------------------- %%-------------------------------------------------------------------------- %% Handling of control connection setup handle_ctrl_result({pos_compl, _}, #state{caller = open, client = From} = State) -> gen_server:reply(From, {ok, self()}), {noreply, State#state{client = undefined, caller = undefined }}; handle_ctrl_result({_, Lines}, #state{caller = open} = State) -> ctrl_result_response(econn, State, {error, Lines}); %%-------------------------------------------------------------------------- %% Data connection setup active mode handle_ctrl_result({pos_compl, _Lines}, #state{mode = active, caller = {setup_data_connection, {LSock, Caller}}} = State) -> handle_caller(State#state{caller = Caller, dsock = {lsock, LSock}}); handle_ctrl_result({Status, Lines}, #state{mode = active, caller = {setup_data_connection, {LSock, _}}} = State) -> close_connection(LSock), ctrl_result_response(Status, State, {error, Lines}); %% Data connection setup passive mode handle_ctrl_result({pos_compl, Lines}, #state{mode = passive, ipfamily = inet6, client = From, caller = {setup_data_connection, Caller}, csock = CSock, timeout = Timeout} = State) -> [_, PortStr | _] = lists:reverse(string:tokens(Lines, "|")), {ok, {IP, _}} = inet:peername(CSock), case connect(IP, list_to_integer(PortStr), Timeout, State) of {ok, _, Socket} -> handle_caller(State#state{caller = Caller, dsock = Socket}); {error, _Reason} = Error -> gen_server:reply(From, Error), {noreply, State#state{client = undefined, caller = undefined}} end; handle_ctrl_result({pos_compl, Lines}, #state{mode = passive, ipfamily = inet, client = From, caller = {setup_data_connection, Caller}, timeout = Timeout} = State) -> {_, [?LEFT_PAREN | Rest]} = lists:splitwith(fun(?LEFT_PAREN) -> false; (_) -> true end, Lines), {NewPortAddr, _} = lists:splitwith(fun(?RIGHT_PAREN) -> false; (_) -> true end, Rest), [A1, A2, A3, A4, P1, P2] = lists:map(fun(X) -> list_to_integer(X) end, string:tokens(NewPortAddr, [$,])), IP = {A1, A2, A3, A4}, Port = (P1 * 256) + P2, case connect(IP, Port, Timeout, State) of {ok, _, Socket} -> handle_caller(State#state{caller = Caller, dsock = Socket}); {error, _Reason} = Error -> gen_server:reply(From, Error), {noreply,State#state{client = undefined, caller = undefined}} end; %% FTP server does not support passive mode: try to fallback on active mode handle_ctrl_result(_, #state{mode = passive, caller = {setup_data_connection, Caller}} = State) -> setup_data_connection(State#state{mode = active, caller = Caller}); %%-------------------------------------------------------------------------- %% User handling handle_ctrl_result({pos_interm, _}, #state{caller = {handle_user, PassWord, Acc}} = State) -> handle_user_passwd(PassWord, Acc, State); handle_ctrl_result({Status, _}, #state{caller = {handle_user, _, _}} = State) -> ctrl_result_response(Status, State, {error, euser}); %% Accounts handle_ctrl_result({pos_interm_acct, _}, #state{caller = {handle_user_passwd, Acc}} = State) when Acc =/= "" -> handle_user_account(Acc, State); handle_ctrl_result({Status, _}, #state{caller = {handle_user_passwd, _}} = State) -> ctrl_result_response(Status, State, {error, euser}); %%-------------------------------------------------------------------------- %% Print current working directory handle_ctrl_result({pos_compl, Lines}, #state{caller = pwd, client = From} = State) -> Dir = pwd_result(Lines), gen_server:reply(From, {ok, Dir}), {noreply, State#state{client = undefined, caller = undefined}}; %%-------------------------------------------------------------------------- %% Directory listing handle_ctrl_result({pos_prel, _}, #state{caller = {dir, Dir}} = State) -> NewState = accept_data_connection(State), activate_data_connection(NewState), {noreply, NewState#state{caller = {handle_dir_result, Dir}}}; handle_ctrl_result({pos_compl, _}, #state{caller = {handle_dir_result, Dir, Data}, client = From} = State) -> case Dir of "" -> % Current directory gen_server:reply(From, {ok, Data}), {noreply, State#state{client = undefined, caller = undefined}}; _ -> %% <WTF> %% Dir cannot be assumed to be a dir. It is a string that %% could be a dir, but could also be a file or even a string %% containing wildcards (*). %% %% %% If there is only one line it might be a directory with one %% %% file but it might be an error message that the directory %% %% was not found. So in this case we have to endure a little %% %% overhead to be able to give a good return value. Alas not %% %% all ftp implementations behave the same and returning %% %% an error string is allowed by the FTP RFC. %% case lists:dropwhile(fun(?CR) -> false;(_) -> true end, %% binary_to_list(Data)) of %% L when (L =:= [?CR, ?LF]) orelse (L =:= []) -> %% send_ctrl_message(State, mk_cmd("PWD", [])), %% activate_ctrl_connection(State), %% {noreply, %% State#state{caller = {handle_dir_data, Dir, Data}}}; %% _ -> %% gen_server:reply(From, {ok, Data}), %% {noreply, State#state{client = undefined, %% caller = undefined}} %% end %% </WTF> gen_server:reply(From, {ok, Data}), {noreply, State#state{client = undefined, caller = undefined}} end; handle_ctrl_result({pos_compl, Lines}, #state{caller = {handle_dir_data, Dir, DirData}} = State) -> OldDir = pwd_result(Lines), send_ctrl_message(State, mk_cmd("CWD ~s", [Dir])), activate_ctrl_connection(State), {noreply, State#state{caller = {handle_dir_data_second_phase, OldDir, DirData}}}; handle_ctrl_result({Status, _}, #state{caller = {handle_dir_data, _, _}} = State) -> ctrl_result_response(Status, State, {error, epath}); handle_ctrl_result(S={_Status, _}, #state{caller = {handle_dir_result, _, _}} = State) -> %% OTP-5731, macosx ctrl_result_response(S, State, {error, epath}); handle_ctrl_result({pos_compl, _}, #state{caller = {handle_dir_data_second_phase, OldDir, DirData}} = State) -> send_ctrl_message(State, mk_cmd("CWD ~s", [OldDir])), activate_ctrl_connection(State), {noreply, State#state{caller = {handle_dir_data_third_phase, DirData}}}; handle_ctrl_result({Status, _}, #state{caller = {handle_dir_data_second_phase, _, _}} = State) -> ctrl_result_response(Status, State, {error, epath}); handle_ctrl_result(_, #state{caller = {handle_dir_data_third_phase, DirData}, client = From} = State) -> gen_server:reply(From, {ok, DirData}), {noreply, State#state{client = undefined, caller = undefined}}; handle_ctrl_result({Status, _}, #state{caller = cd} = State) -> ctrl_result_response(Status, State, {error, epath}); handle_ctrl_result(Status={epath, _}, #state{caller = {dir,_}} = State) -> ctrl_result_response(Status, State, {error, epath}); %%-------------------------------------------------------------------------- %% File renaming handle_ctrl_result({pos_interm, _}, #state{caller = {rename, NewFile}} = State) -> send_ctrl_message(State, mk_cmd("RNTO ~s", [NewFile])), activate_ctrl_connection(State), {noreply, State#state{caller = rename_second_phase}}; handle_ctrl_result({Status, _}, #state{caller = {rename, _}} = State) -> ctrl_result_response(Status, State, {error, epath}); handle_ctrl_result({Status, _}, #state{caller = rename_second_phase} = State) -> ctrl_result_response(Status, State, {error, epath}); %%-------------------------------------------------------------------------- %% File handling - recv_bin handle_ctrl_result({pos_prel, _}, #state{caller = recv_bin} = State) -> NewState = accept_data_connection(State), activate_data_connection(NewState), {noreply, NewState}; handle_ctrl_result({pos_compl, _}, #state{caller = {recv_bin, Data}, client = From} = State) -> gen_server:reply(From, {ok, Data}), close_data_connection(State), {noreply, State#state{client = undefined, caller = undefined}}; handle_ctrl_result({Status, _}, #state{caller = recv_bin} = State) -> close_data_connection(State), ctrl_result_response(Status, State#state{dsock = undefined}, {error, epath}); handle_ctrl_result({Status, _}, #state{caller = {recv_bin, _}} = State) -> close_data_connection(State), ctrl_result_response(Status, State#state{dsock = undefined}, {error, epath}); %%-------------------------------------------------------------------------- %% File handling - start_chunk_transfer handle_ctrl_result({pos_prel, _}, #state{client = From, caller = start_chunk_transfer} = State) -> NewState = accept_data_connection(State), gen_server:reply(From, ok), {noreply, NewState#state{chunk = true, client = undefined, caller = undefined}}; %%-------------------------------------------------------------------------- %% File handling - recv_file handle_ctrl_result({pos_prel, _}, #state{caller = {recv_file, _}} = State) -> NewState = accept_data_connection(State), activate_data_connection(NewState), {noreply, NewState}; handle_ctrl_result({Status, _}, #state{caller = {recv_file, Fd}} = State) -> file_close(Fd), close_data_connection(State), ctrl_result_response(Status, State#state{dsock = undefined}, {error, epath}); %%-------------------------------------------------------------------------- %% File handling - transfer_* handle_ctrl_result({pos_prel, _}, #state{caller = {transfer_file, Fd}} = State) -> NewState = accept_data_connection(State), send_file(Fd, NewState); handle_ctrl_result({pos_prel, _}, #state{caller = {transfer_data, Bin}} = State) -> NewState = accept_data_connection(State), send_data_message(NewState, Bin), close_data_connection(NewState), activate_ctrl_connection(NewState), {noreply, NewState#state{caller = transfer_data_second_phase, dsock = undefined}}; %%-------------------------------------------------------------------------- %% Default handle_ctrl_result({Status, Lines}, #state{client = From} = State) when From =/= undefined -> ctrl_result_response(Status, State, {error, Lines}). %%-------------------------------------------------------------------------- %% Help functions to handle_ctrl_result %%-------------------------------------------------------------------------- ctrl_result_response(pos_compl, #state{client = From} = State, _) -> gen_server:reply(From, ok), {noreply, State#state{client = undefined, caller = undefined}}; ctrl_result_response(Status, #state{client = From} = State, _) when (Status =:= etnospc) orelse (Status =:= epnospc) orelse (Status =:= efnamena) orelse (Status =:= econn) -> %Status == etnospc; Status == epnospc; Status == econn -> gen_server:reply(From, {error, Status}), %% {stop, normal, {error, Status}, State#state{client = undefined}}; {stop, normal, State#state{client = undefined}}; ctrl_result_response(_, #state{client = From} = State, ErrorMsg) -> gen_server:reply(From, ErrorMsg), {noreply, State#state{client = undefined, caller = undefined}}. %%-------------------------------------------------------------------------- handle_caller(#state{caller = {dir, Dir, Len}} = State) -> Cmd = case Len of short -> "NLST"; long -> "LIST" end, case Dir of "" -> send_ctrl_message(State, mk_cmd(Cmd, "")); _ -> send_ctrl_message(State, mk_cmd(Cmd ++ " ~s", [Dir])) end, activate_ctrl_connection(State), {noreply, State#state{caller = {dir, Dir}}}; handle_caller(#state{caller = {recv_bin, RemoteFile}} = State) -> send_ctrl_message(State, mk_cmd("RETR ~s", [RemoteFile])), activate_ctrl_connection(State), {noreply, State#state{caller = recv_bin}}; handle_caller(#state{caller = {start_chunk_transfer, Cmd, RemoteFile}} = State) -> send_ctrl_message(State, mk_cmd("~s ~s", [Cmd, RemoteFile])), activate_ctrl_connection(State), {noreply, State#state{caller = start_chunk_transfer}}; handle_caller(#state{caller = {recv_file, RemoteFile, Fd}} = State) -> send_ctrl_message(State, mk_cmd("RETR ~s", [RemoteFile])), activate_ctrl_connection(State), {noreply, State#state{caller = {recv_file, Fd}}}; handle_caller(#state{caller = {transfer_file, {Cmd, LocalFile, RemoteFile}}, ldir = LocalDir, client = From} = State) -> case file_open(filename:absname(LocalFile, LocalDir), read) of {ok, Fd} -> send_ctrl_message(State, mk_cmd("~s ~s", [Cmd, RemoteFile])), activate_ctrl_connection(State), {noreply, State#state{caller = {transfer_file, Fd}}}; {error, _} -> gen_server:reply(From, {error, epath}), {noreply, State#state{client = undefined, caller = undefined, dsock = undefined}} end; handle_caller(#state{caller = {transfer_data, {Cmd, Bin, RemoteFile}}} = State) -> send_ctrl_message(State, mk_cmd("~s ~s", [Cmd, RemoteFile])), activate_ctrl_connection(State), {noreply, State#state{caller = {transfer_data, Bin}}}. %% ----------- FTP SERVER COMMUNICATION ------------------------- %% Connect to FTP server at Host (default is TCP port 21) %% in order to establish a control connection. setup_ctrl_connection(Host, Port, Timeout, State) -> MsTime = millisec_time(), case connect(Host, Port, Timeout, State) of {ok, IpFam, CSock} -> NewState = State#state{csock = CSock, ipfamily = IpFam}, activate_ctrl_connection(NewState), case Timeout - (millisec_time() - MsTime) of Timeout2 when (Timeout2 >= 0) -> {ok, NewState#state{caller = open}, Timeout2}; _ -> %% Oups: Simulate timeout {ok, NewState#state{caller = open}, 0} end; Error -> Error end. setup_data_connection(#state{mode = active, caller = Caller, csock = CSock} = State) -> IntToString = fun(Element) -> integer_to_list(Element) end, case (catch inet:sockname(CSock)) of {ok, {{_, _, _, _, _, _, _, _} = IP, _}} -> {ok, LSock} = gen_tcp:listen(0, [{ip, IP}, {active, false}, inet6, binary, {packet, 0}]), {ok, Port} = inet:port(LSock), Cmd = mk_cmd("EPRT |2|~s:~s:~s:~s:~s:~s:~s:~s|~s|", lists:map(IntToString, tuple_to_list(IP) ++ [Port])), send_ctrl_message(State, Cmd), activate_ctrl_connection(State), {noreply, State#state{caller = {setup_data_connection, {LSock, Caller}}}}; {ok, {{_,_,_,_} = IP, _}} -> {ok, LSock} = gen_tcp:listen(0, [{ip, IP}, {active, false}, binary, {packet, 0}]), {ok, Port} = inet:port(LSock), {IP1, IP2, IP3, IP4} = IP, {Port1, Port2} = {Port div 256, Port rem 256}, send_ctrl_message(State, mk_cmd("PORT ~w,~w,~w,~w,~w,~w", [IP1, IP2, IP3, IP4, Port1, Port2])), activate_ctrl_connection(State), {noreply, State#state{caller = {setup_data_connection, {LSock, Caller}}}} end; setup_data_connection(#state{mode = passive, ipfamily = inet6, caller = Caller} = State) -> send_ctrl_message(State, mk_cmd("EPSV", [])), activate_ctrl_connection(State), {noreply, State#state{caller = {setup_data_connection, Caller}}}; setup_data_connection(#state{mode = passive, ipfamily = inet, caller = Caller} = State) -> send_ctrl_message(State, mk_cmd("PASV", [])), activate_ctrl_connection(State), {noreply, State#state{caller = {setup_data_connection, Caller}}}. %% setup_data_connection(#state{mode = passive, ip_v6_disabled = false, %% caller = Caller} = State) -> %% send_ctrl_message(State, mk_cmd("EPSV", [])), %% activate_ctrl_connection(State), %% {noreply, State#state{caller = {setup_data_connection, Caller}}}; %% setup_data_connection(#state{mode = passive, ip_v6_disabled = true, %% caller = Caller} = State) -> %% send_ctrl_message(State, mk_cmd("PASV", [])), %% activate_ctrl_connection(State), %% {noreply, State#state{caller = {setup_data_connection, Caller}}}. connect(Host, Port, Timeout, #state{ipfamily = inet = IpFam}) -> connect2(Host, Port, IpFam, Timeout); connect(Host, Port, Timeout, #state{ipfamily = inet6 = IpFam}) -> connect2(Host, Port, IpFam, Timeout); connect(Host, Port, Timeout, #state{ipfamily = inet6fb4}) -> case inet:getaddr(Host, inet6) of {ok, {0, 0, 0, 0, 0, 16#ffff, _, _} = IPv6} -> case inet:getaddr(Host, inet) of {ok, IPv4} -> IpFam = inet, connect2(IPv4, Port, IpFam, Timeout); _ -> IpFam = inet6, connect2(IPv6, Port, IpFam, Timeout) end; {ok, IPv6} -> IpFam = inet6, connect2(IPv6, Port, IpFam, Timeout); _ -> case inet:getaddr(Host, inet) of {ok, IPv4} -> IpFam = inet, connect2(IPv4, Port, IpFam, Timeout); Error -> Error end end. connect2(Host, Port, IpFam, Timeout) -> Opts = [IpFam, binary, {packet, 0}, {active, false}], case gen_tcp:connect(Host, Port, Opts, Timeout) of {ok, Sock} -> {ok, IpFam, Sock}; Error -> Error end. accept_data_connection(#state{mode = active, dsock = {lsock, LSock}} = State) -> {ok, Socket} = gen_tcp:accept(LSock), gen_tcp:close(LSock), State#state{dsock = Socket}; accept_data_connection(#state{mode = passive} = State) -> State. send_ctrl_message(#state{csock = Socket, verbose = Verbose}, Message) -> %% io:format("send control message: ~n~p~n", [lists:flatten(Message)]), verbose(lists:flatten(Message),Verbose,send), send_message(Socket, Message). send_data_message(#state{dsock = Socket}, Message) -> send_message(Socket, Message). send_message(Socket, Message) -> case gen_tcp:send(Socket, Message) of ok -> ok; {error, Reason} -> Report = io_lib:format("gen_tcp:send/2 failed for " "reason ~p~n", [Reason]), error_logger:error_report(Report), %% If tcp does not work the only option is to terminate, %% this is the expected behavior under these circumstances. exit(normal) %% User will get error message from terminate/2 end. activate_ctrl_connection(#state{csock = Socket, ctrl_data = {<<>>, _, _}}) -> activate_connection(Socket); activate_ctrl_connection(#state{csock = Socket}) -> %% We have already received at least part of the next control message, %% that has been saved in ctrl_data, process this first. self() ! {tcp, Socket, <<>>}. activate_data_connection(#state{dsock = Socket}) -> activate_connection(Socket). activate_connection(Socket) -> inet:setopts(Socket, [{active, once}]). close_ctrl_connection(#state{csock = undefined}) -> ok; close_ctrl_connection(#state{csock = Socket}) -> close_connection(Socket). close_data_connection(#state{dsock = undefined}) -> ok; close_data_connection(#state{dsock = {lsock, Socket}}) -> close_connection(Socket); close_data_connection(#state{dsock = Socket}) -> close_connection(Socket). close_connection(Socket) -> gen_tcp:close(Socket). %% ------------ FILE HANDELING ---------------------------------------- send_file(Fd, State) -> case file_read(Fd) of {ok, N, Bin} when N > 0-> send_data_message(State, Bin), progress_report({binary, Bin}, State), send_file(Fd, State); {ok, _, _} -> file_close(Fd), close_data_connection(State), progress_report({transfer_size, 0}, State), activate_ctrl_connection(State), {noreply, State#state{caller = transfer_file_second_phase, dsock = undefined}}; {error, Reason} -> gen_server:reply(State#state.client, {error, Reason}), {stop, normal, State#state{client = undefined}} end. file_open(File, Option) -> file:open(File, [raw, binary, Option]). file_close(Fd) -> file:close(Fd). file_read(Fd) -> case file:read(Fd, ?FILE_BUFSIZE) of {ok, Bytes} -> {ok, size(Bytes), Bytes}; eof -> {ok, 0, []}; Other -> Other end. file_write(Bytes, Fd) -> file:write(Fd, Bytes). %% -------------- MISC ---------------------------------------------- call(GenServer, Msg, Format) -> call(GenServer, Msg, Format, infinity). call(GenServer, Msg, Format, Timeout) -> Req = {self(), Msg}, case (catch gen_server:call(GenServer, Req, Timeout)) of {ok, Bin} when is_binary(Bin) andalso (Format =:= string) -> {ok, binary_to_list(Bin)}; {'EXIT', _} -> {error, eclosed}; Result -> Result end. cast(GenServer, Msg) -> gen_server:cast(GenServer, {self(), Msg}). mk_cmd(Fmt, Args) -> [io_lib:format(Fmt, Args)| [?CR, ?LF]]. % Deep list ok. pwd_result(Lines) -> {_, [?DOUBLE_QUOTE | Rest]} = lists:splitwith(fun(?DOUBLE_QUOTE) -> false; (_) -> true end, Lines), {Dir, _} = lists:splitwith(fun(?DOUBLE_QUOTE) -> false; (_) -> true end, Rest), Dir. %% is_verbose(Params) -> %% check_param(verbose, Params). %% is_debug(Flags) -> %% check_param(debug, Flags). %% is_trace(Flags) -> %% check_param(trace, Flags). %% is_ipv6_disabled(Flags) -> %% check_param(ip_v6_disabled, Flags). %% check_param(Param, Params) -> %% lists:member(Param, Params). key_search(Key, List, Default) -> case lists:keysearch(Key, 1, List) of {value, {_,Val}} -> Val; false -> Default end. %% check_option(Pred, Value, Default) -> %% case Pred(Value) of %% true -> %% Value; %% false -> %% Default %% end. verbose(Lines, true, Direction) -> DirStr = case Direction of send -> "Sending: "; _ -> "Receiving: " end, Str = string:strip(string:strip(Lines, right, ?LF), right, ?CR), erlang:display(DirStr++Str); verbose(_, false,_) -> ok. progress(Options) -> ftp_progress:start_link(Options). progress_report(_, #state{progress = ignore}) -> ok; progress_report(stop, #state{progress = ProgressPid}) -> ftp_progress:stop(ProgressPid); progress_report({binary, Data}, #state{progress = ProgressPid}) -> ftp_progress:report(ProgressPid, {transfer_size, size(Data)}); progress_report(Report, #state{progress = ProgressPid}) -> ftp_progress:report(ProgressPid, Report). millisec_time() -> {A,B,C} = erlang:now(), A*1000000000+B*1000+(C div 1000).