#!/usr/bin/env perl #*************************************************************************** # _ _ ____ _ # Project ___| | | | _ \| | # / __| | | | |_) | | # | (__| |_| | _ <| |___ # \___|\___/|_| \_\_____| # # Copyright (C) 1998 - 2020, Daniel Stenberg, , et al. # # This software is licensed as described in the file COPYING, which # you should have received as part of this distribution. The terms # are also available at https://curl.haxx.se/docs/copyright.html. # # You may opt to use, copy, modify, merge, publish, distribute and/or sell # copies of the Software, and permit persons to whom the Software is # furnished to do so, under the terms of the COPYING file. # # This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY # KIND, either express or implied. # ########################################################################### # This is a server designed for the curl test suite. # # In December 2009 we started remaking the server to support more protocols # that are similar in spirit. Like POP3, IMAP and SMTP in addition to the FTP # it already supported since a long time. Note that it still only supports one # protocol per invoke. You need to start multiple servers to support multiple # protocols simultaneously. # # It is meant to exercise curl, it is not meant to be a fully working # or even very standard compliant server. # # You may optionally specify port on the command line, otherwise it'll # default to port 8921. # # All socket/network/TCP related stuff is done by the 'sockfilt' program. # BEGIN { push(@INC, $ENV{'srcdir'}) if(defined $ENV{'srcdir'}); push(@INC, "."); # sub second timestamping needs Time::HiRes eval { no warnings "all"; require Time::HiRes; import Time::HiRes qw( gettimeofday ); } } use strict; use warnings; use IPC::Open2; use Digest::MD5; require "getpart.pm"; require "ftp.pm"; require "directories.pm"; use serverhelp qw( servername_str server_pidfilename server_logfilename mainsockf_pidfilename mainsockf_logfilename datasockf_pidfilename datasockf_logfilename ); use sshhelp qw( exe_ext ); #********************************************************************** # global vars... # my $verbose = 0; # set to 1 for debugging my $idstr = ""; # server instance string my $idnum = 1; # server instance number my $ipvnum = 4; # server IPv number (4 or 6) my $proto = 'ftp'; # default server protocol my $srcdir; # directory where ftpserver.pl is located my $srvrname; # server name for presentation purposes my $cwd_testno; # test case numbers extracted from CWD command my $path = '.'; my $logdir = $path .'/log'; #********************************************************************** # global vars used for server address and primary listener port # my $port = 8921; # default primary listener port my $listenaddr = '127.0.0.1'; # default address for listener port #********************************************************************** # global vars used for file names # my $pidfile; # server pid file name my $logfile; # server log file name my $mainsockf_pidfile; # pid file for primary connection sockfilt process my $mainsockf_logfile; # log file for primary connection sockfilt process my $datasockf_pidfile; # pid file for secondary connection sockfilt process my $datasockf_logfile; # log file for secondary connection sockfilt process #********************************************************************** # global vars used for server logs advisor read lock handling # my $SERVERLOGS_LOCK = 'log/serverlogs.lock'; my $serverlogslocked = 0; #********************************************************************** # global vars used for child processes PID tracking # my $sfpid; # PID for primary connection sockfilt process my $slavepid; # PID for secondary connection sockfilt process #********************************************************************** # global typeglob filehandle vars to read/write from/to sockfilters # local *SFREAD; # used to read from primary connection local *SFWRITE; # used to write to primary connection local *DREAD; # used to read from secondary connection local *DWRITE; # used to write to secondary connection my $sockfilt_timeout = 5; # default timeout for sockfilter eXsysreads #********************************************************************** # global vars which depend on server protocol selection # my %commandfunc; # protocol command specific function callbacks my %displaytext; # text returned to client before callback runs #********************************************************************** # global vars customized for each test from the server commands file # my $ctrldelay; # set if server should throttle ctrl stream my $datadelay; # set if server should throttle data stream my $retrweirdo; # set if ftp server should use RETRWEIRDO my $retrnosize; # set if ftp server should use RETRNOSIZE my $pasvbadip; # set if ftp server should use PASVBADIP my $nosave; # set if ftp server should not save uploaded data my $nodataconn; # set if ftp srvr doesn't establish or accepts data channel my $nodataconn425; # set if ftp srvr doesn't establish data ch and replies 425 my $nodataconn421; # set if ftp srvr doesn't establish data ch and replies 421 my $nodataconn150; # set if ftp srvr doesn't establish data ch and replies 150 my @capabilities; # set if server supports capability commands my @auth_mechs; # set if server supports authentication commands my %fulltextreply; # my %commandreply; # my %customcount; # my %delayreply; # #********************************************************************** # global variables for to test ftp wildcardmatching or other test that # need flexible LIST responses.. and corresponding files. # $ftptargetdir is keeping the fake "name" of LIST directory. # my $ftplistparserstate; my $ftptargetdir=""; #********************************************************************** # global variables used when running a ftp server to keep state info # relative to the secondary or data sockfilt process. Values of these # variables should only be modified using datasockf_state() sub, given # that they are closely related and relationship is a bit awkward. # my $datasockf_state = 'STOPPED'; # see datasockf_state() sub my $datasockf_mode = 'none'; # ['none','active','passive'] my $datasockf_runs = 'no'; # ['no','yes'] my $datasockf_conn = 'no'; # ['no','yes'] #********************************************************************** # global vars used for signal handling # my $got_exit_signal = 0; # set if program should finish execution ASAP my $exit_signal; # first signal handled in exit_signal_handler #********************************************************************** # Mail related definitions # my $TEXT_PASSWORD = "secret"; my $POP3_TIMESTAMP = "<1972.987654321\@curl>"; #********************************************************************** # exit_signal_handler will be triggered to indicate that the program # should finish its execution in a controlled way as soon as possible. # For now, program will also terminate from within this handler. # sub exit_signal_handler { my $signame = shift; # For now, simply mimic old behavior. killsockfilters($proto, $ipvnum, $idnum, $verbose); unlink($pidfile); if($serverlogslocked) { $serverlogslocked = 0; clear_advisor_read_lock($SERVERLOGS_LOCK); } exit; } #********************************************************************** # logmsg is general message logging subroutine for our test servers. # sub logmsg { my $now; # sub second timestamping needs Time::HiRes if($Time::HiRes::VERSION) { my ($seconds, $usec) = gettimeofday(); my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime($seconds); $now = sprintf("%02d:%02d:%02d.%06d ", $hour, $min, $sec, $usec); } else { my $seconds = time(); my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime($seconds); $now = sprintf("%02d:%02d:%02d ", $hour, $min, $sec); } if(open(LOGFILEFH, ">>$logfile")) { print LOGFILEFH $now; print LOGFILEFH @_; close(LOGFILEFH); } } sub ftpmsg { # append to the server.input file open(INPUT, ">>log/server$idstr.input") || logmsg "failed to open log/server$idstr.input\n"; print INPUT @_; close(INPUT); # use this, open->print->close system only to make the file # open as little as possible, to make the test suite run # better on windows/cygwin } #********************************************************************** # eXsysread is a wrapper around perl's sysread() function. This will # repeat the call to sysread() until it has actually read the complete # number of requested bytes or an unrecoverable condition occurs. # On success returns a positive value, the number of bytes requested. # On failure or timeout returns zero. # sub eXsysread { my $FH = shift; my $scalar = shift; my $nbytes = shift; my $timeout = shift; # A zero timeout disables eXsysread() time limit # my $time_limited = 0; my $timeout_rest = 0; my $start_time = 0; my $nread = 0; my $rc; $$scalar = ""; if((not defined $nbytes) || ($nbytes < 1)) { logmsg "Error: eXsysread() failure: " . "length argument must be positive\n"; return 0; } if((not defined $timeout) || ($timeout < 0)) { logmsg "Error: eXsysread() failure: " . "timeout argument must be zero or positive\n"; return 0; } if($timeout > 0) { # caller sets eXsysread() time limit $time_limited = 1; $timeout_rest = $timeout; $start_time = int(time()); } while($nread < $nbytes) { if($time_limited) { eval { local $SIG{ALRM} = sub { die "alarm\n"; }; alarm $timeout_rest; $rc = sysread($FH, $$scalar, $nbytes - $nread, $nread); alarm 0; }; $timeout_rest = $timeout - (int(time()) - $start_time); if($timeout_rest < 1) { logmsg "Error: eXsysread() failure: timed out\n"; return 0; } } else { $rc = sysread($FH, $$scalar, $nbytes - $nread, $nread); } if($got_exit_signal) { logmsg "Error: eXsysread() failure: signalled to die\n"; return 0; } if(not defined $rc) { if($!{EINTR}) { logmsg "Warning: retrying sysread() interrupted system call\n"; next; } if($!{EAGAIN}) { logmsg "Warning: retrying sysread() due to EAGAIN\n"; next; } if($!{EWOULDBLOCK}) { logmsg "Warning: retrying sysread() due to EWOULDBLOCK\n"; next; } logmsg "Error: sysread() failure: $!\n"; return 0; } if($rc < 0) { logmsg "Error: sysread() failure: returned negative value $rc\n"; return 0; } if($rc == 0) { logmsg "Error: sysread() failure: read zero bytes\n"; return 0; } $nread += $rc; } return $nread; } #********************************************************************** # read_mainsockf attempts to read the given amount of output from the # sockfilter which is in use for the main or primary connection. This # reads untranslated sockfilt lingo which may hold data read from the # main or primary socket. On success returns 1, otherwise zero. # sub read_mainsockf { my $scalar = shift; my $nbytes = shift; my $timeout = shift; # Optional argument, if zero blocks indefinitely my $FH = \*SFREAD; if(not defined $timeout) { $timeout = $sockfilt_timeout + ($nbytes >> 12); } if(eXsysread($FH, $scalar, $nbytes, $timeout) != $nbytes) { my ($fcaller, $lcaller) = (caller)[1,2]; logmsg "Error: read_mainsockf() failure at $fcaller " . "line $lcaller. Due to eXsysread() failure\n"; return 0; } return 1; } #********************************************************************** # read_datasockf attempts to read the given amount of output from the # sockfilter which is in use for the data or secondary connection. This # reads untranslated sockfilt lingo which may hold data read from the # data or secondary socket. On success returns 1, otherwise zero. # sub read_datasockf { my $scalar = shift; my $nbytes = shift; my $timeout = shift; # Optional argument, if zero blocks indefinitely my $FH = \*DREAD; if(not defined $timeout) { $timeout = $sockfilt_timeout + ($nbytes >> 12); } if(eXsysread($FH, $scalar, $nbytes, $timeout) != $nbytes) { my ($fcaller, $lcaller) = (caller)[1,2]; logmsg "Error: read_datasockf() failure at $fcaller " . "line $lcaller. Due to eXsysread() failure\n"; return 0; } return 1; } sub sysread_or_die { my $FH = shift; my $scalar = shift; my $length = shift; my $fcaller; my $lcaller; my $result; $result = sysread($$FH, $$scalar, $length); if(not defined $result) { ($fcaller, $lcaller) = (caller)[1,2]; logmsg "Failed to read input\n"; logmsg "Error: $srvrname server, sysread error: $!\n"; logmsg "Exited from sysread_or_die() at $fcaller " . "line $lcaller. $srvrname server, sysread error: $!\n"; killsockfilters($proto, $ipvnum, $idnum, $verbose); unlink($pidfile); if($serverlogslocked) { $serverlogslocked = 0; clear_advisor_read_lock($SERVERLOGS_LOCK); } exit; } elsif($result == 0) { ($fcaller, $lcaller) = (caller)[1,2]; logmsg "Failed to read input\n"; logmsg "Error: $srvrname server, read zero\n"; logmsg "Exited from sysread_or_die() at $fcaller " . "line $lcaller. $srvrname server, read zero\n"; killsockfilters($proto, $ipvnum, $idnum, $verbose); unlink($pidfile); if($serverlogslocked) { $serverlogslocked = 0; clear_advisor_read_lock($SERVERLOGS_LOCK); } exit; } return $result; } sub startsf { my $mainsockfcmd = "./server/sockfilt".exe_ext('SRV')." " . "--ipv$ipvnum --port $port " . "--pidfile \"$mainsockf_pidfile\" " . "--logfile \"$mainsockf_logfile\""; $sfpid = open2(*SFREAD, *SFWRITE, $mainsockfcmd); print STDERR "$mainsockfcmd\n" if($verbose); print SFWRITE "PING\n"; my $pong; sysread_or_die(\*SFREAD, \$pong, 5); if($pong !~ /^PONG/) { logmsg "Failed sockfilt command: $mainsockfcmd\n"; killsockfilters($proto, $ipvnum, $idnum, $verbose); unlink($pidfile); if($serverlogslocked) { $serverlogslocked = 0; clear_advisor_read_lock($SERVERLOGS_LOCK); } die "Failed to start sockfilt!"; } } #********************************************************************** # Returns the given test's reply data # sub getreplydata { my ($testno) = @_; my $testpart = ""; $testno =~ s/^([^0-9]*)//; if($testno > 10000) { $testpart = $testno % 10000; $testno = int($testno / 10000); } loadtest("$srcdir/data/test$testno"); my @data = getpart("reply", "data$testpart"); if((!@data) && ($testpart ne "")) { @data = getpart("reply", "data"); } return @data; } sub sockfilt { my $l; foreach $l (@_) { printf SFWRITE "DATA\n%04x\n", length($l); print SFWRITE $l; } } sub sockfiltsecondary { my $l; foreach $l (@_) { printf DWRITE "DATA\n%04x\n", length($l); print DWRITE $l; } } #********************************************************************** # Send data to the client on the control stream, which happens to be plain # stdout. # sub sendcontrol { if(!$ctrldelay) { # spit it all out at once sockfilt @_; } else { my $a = join("", @_); my @a = split("", $a); for(@a) { sockfilt $_; portable_sleep(0.01); } } my $log; foreach $log (@_) { my $l = $log; $l =~ s/\r/[CR]/g; $l =~ s/\n/[LF]/g; logmsg "> \"$l\"\n"; } } #********************************************************************** # Send data to the FTP client on the data stream when data connection # is actually established. Given that this sub should only be called # when a data connection is supposed to be established, calling this # without a data connection is an indication of weak logic somewhere. # sub senddata { my $l; if($datasockf_conn eq 'no') { logmsg "WARNING: Detected data sending attempt without DATA channel\n"; foreach $l (@_) { logmsg "WARNING: Data swallowed: $l\n" } return; } foreach $l (@_) { if(!$datadelay) { # spit it all out at once sockfiltsecondary $l; } else { # pause between each byte for (split(//,$l)) { sockfiltsecondary $_; portable_sleep(0.01); } } } } #********************************************************************** # protocolsetup initializes the 'displaytext' and 'commandfunc' hashes # for the given protocol. References to protocol command callbacks are # stored in 'commandfunc' hash, and text which will be returned to the # client before the command callback runs is stored in 'displaytext'. # sub protocolsetup { my $proto = $_[0]; if($proto eq 'ftp') { %commandfunc = ( 'PORT' => \&PORT_ftp, 'EPRT' => \&PORT_ftp, 'LIST' => \&LIST_ftp, 'NLST' => \&NLST_ftp, 'PASV' => \&PASV_ftp, 'CWD' => \&CWD_ftp, 'PWD' => \&PWD_ftp, 'EPSV' => \&PASV_ftp, 'RETR' => \&RETR_ftp, 'SIZE' => \&SIZE_ftp, 'REST' => \&REST_ftp, 'STOR' => \&STOR_ftp, 'APPE' => \&STOR_ftp, # append looks like upload 'MDTM' => \&MDTM_ftp, ); %displaytext = ( 'USER' => '331 We are happy you popped in!', 'PASS' => '230 Welcome you silly person', 'PORT' => '200 You said PORT - I say FINE', 'TYPE' => '200 I modify TYPE as you wanted', 'LIST' => '150 here comes a directory', 'NLST' => '150 here comes a directory', 'CWD' => '250 CWD command successful.', 'SYST' => '215 UNIX Type: L8', # just fake something 'QUIT' => '221 bye bye baby', # just reply something 'MKD' => '257 Created your requested directory', 'REST' => '350 Yeah yeah we set it there for you', 'DELE' => '200 OK OK OK whatever you say', 'RNFR' => '350 Received your order. Please provide more', 'RNTO' => '250 Ok, thanks. File renaming completed.', 'NOOP' => '200 Yes, I\'m very good at doing nothing.', 'PBSZ' => '500 PBSZ not implemented', 'PROT' => '500 PROT not implemented', 'welcome' => join("", '220- _ _ ____ _ '."\r\n", '220- ___| | | | _ \| | '."\r\n", '220- / __| | | | |_) | | '."\r\n", '220- | (__| |_| | _ {| |___ '."\r\n", '220 \___|\___/|_| \_\_____|'."\r\n") ); } elsif($proto eq 'pop3') { %commandfunc = ( 'APOP' => \&APOP_pop3, 'AUTH' => \&AUTH_pop3, 'CAPA' => \&CAPA_pop3, 'DELE' => \&DELE_pop3, 'LIST' => \&LIST_pop3, 'NOOP' => \&NOOP_pop3, 'PASS' => \&PASS_pop3, 'QUIT' => \&QUIT_pop3, 'RETR' => \&RETR_pop3, 'RSET' => \&RSET_pop3, 'STAT' => \&STAT_pop3, 'TOP' => \&TOP_pop3, 'UIDL' => \&UIDL_pop3, 'USER' => \&USER_pop3, ); %displaytext = ( 'welcome' => join("", ' _ _ ____ _ '."\r\n", ' ___| | | | _ \| | '."\r\n", ' / __| | | | |_) | | '."\r\n", ' | (__| |_| | _ {| |___ '."\r\n", ' \___|\___/|_| \_\_____|'."\r\n", '+OK curl POP3 server ready to serve '."\r\n") ); } elsif($proto eq 'imap') { %commandfunc = ( 'APPEND' => \&APPEND_imap, 'CAPABILITY' => \&CAPABILITY_imap, 'CHECK' => \&CHECK_imap, 'CLOSE' => \&CLOSE_imap, 'COPY' => \©_imap, 'CREATE' => \&CREATE_imap, 'DELETE' => \&DELETE_imap, 'EXAMINE' => \&EXAMINE_imap, 'EXPUNGE' => \&EXPUNGE_imap, 'FETCH' => \&FETCH_imap, 'LIST' => \&LIST_imap, 'LSUB' => \&LSUB_imap, 'LOGIN' => \&LOGIN_imap, 'LOGOUT' => \&LOGOUT_imap, 'NOOP' => \&NOOP_imap, 'RENAME' => \&RENAME_imap, 'SEARCH' => \&SEARCH_imap, 'SELECT' => \&SELECT_imap, 'STATUS' => \&STATUS_imap, 'STORE' => \&STORE_imap, 'UID' => \&UID_imap, ); %displaytext = ( 'welcome' => join("", ' _ _ ____ _ '."\r\n", ' ___| | | | _ \| | '."\r\n", ' / __| | | | |_) | | '."\r\n", ' | (__| |_| | _ {| |___ '."\r\n", ' \___|\___/|_| \_\_____|'."\r\n", '* OK curl IMAP server ready to serve'."\r\n") ); } elsif($proto eq 'smtp') { %commandfunc = ( 'DATA' => \&DATA_smtp, 'EHLO' => \&EHLO_smtp, 'EXPN' => \&EXPN_smtp, 'HELO' => \&HELO_smtp, 'HELP' => \&HELP_smtp, 'MAIL' => \&MAIL_smtp, 'NOOP' => \&NOOP_smtp, 'RSET' => \&RSET_smtp, 'RCPT' => \&RCPT_smtp, 'VRFY' => \&VRFY_smtp, 'QUIT' => \&QUIT_smtp, ); %displaytext = ( 'welcome' => join("", '220- _ _ ____ _ '."\r\n", '220- ___| | | | _ \| | '."\r\n", '220- / __| | | | |_) | | '."\r\n", '220- | (__| |_| | _ {| |___ '."\r\n", '220 \___|\___/|_| \_\_____|'."\r\n") ); } } sub close_dataconn { my ($closed)=@_; # non-zero if already disconnected my $datapid = processexists($datasockf_pidfile); logmsg "=====> Closing $datasockf_mode DATA connection...\n"; if(!$closed) { if($datapid > 0) { logmsg "Server disconnects $datasockf_mode DATA connection\n"; print DWRITE "DISC\n"; my $i; sysread DREAD, $i, 5; logmsg "Server disconnected $datasockf_mode DATA connection\n"; } else { logmsg "Server finds $datasockf_mode DATA connection already ". "disconnected\n"; } } else { logmsg "Server knows $datasockf_mode DATA connection is already ". "disconnected\n"; } if($datapid > 0) { logmsg "DATA sockfilt for $datasockf_mode data channel quits ". "(pid $datapid)\n"; print DWRITE "QUIT\n"; waitpid($datapid, 0); unlink($datasockf_pidfile) if(-f $datasockf_pidfile); logmsg "DATA sockfilt for $datasockf_mode data channel quit ". "(pid $datapid)\n"; } else { logmsg "DATA sockfilt for $datasockf_mode data channel already ". "dead\n"; } logmsg "=====> Closed $datasockf_mode DATA connection\n"; datasockf_state('STOPPED'); } ################ ################ SMTP commands ################ # The type of server (SMTP or ESMTP) my $smtp_type; # The client (which normally contains the test number) my $smtp_client; sub EHLO_smtp { my ($client) = @_; my @data; # TODO: Get the IP address of the client connection to use in the # EHLO response when the client doesn't specify one but for now use # 127.0.0.1 if(!$client) { $client = "[127.0.0.1]"; } # Set the server type to ESMTP $smtp_type = "ESMTP"; # Calculate the EHLO response push @data, "$smtp_type pingpong test server Hello $client"; if((@capabilities) || (@auth_mechs)) { my $mechs; for my $c (@capabilities) { push @data, $c; } for my $am (@auth_mechs) { if(!$mechs) { $mechs = "$am"; } else { $mechs .= " $am"; } } if($mechs) { push @data, "AUTH $mechs"; } } # Send the EHLO response for(my $i = 0; $i < @data; $i++) { my $d = $data[$i]; if($i < @data - 1) { sendcontrol "250-$d\r\n"; } else { sendcontrol "250 $d\r\n"; } } # Store the client (as it may contain the test number) $smtp_client = $client; return 0; } sub HELO_smtp { my ($client) = @_; # TODO: Get the IP address of the client connection to use in the HELO # response when the client doesn't specify one but for now use 127.0.0.1 if(!$client) { $client = "[127.0.0.1]"; } # Set the server type to SMTP $smtp_type = "SMTP"; # Send the HELO response sendcontrol "250 $smtp_type pingpong test server Hello $client\r\n"; # Store the client (as it may contain the test number) $smtp_client = $client; return 0; } sub MAIL_smtp { my ($args) = @_; logmsg "MAIL_smtp got $args\n"; if (!$args) { sendcontrol "501 Unrecognized parameter\r\n"; } else { my $from; my $size; my $smtputf8 = grep /^SMTPUTF8$/, @capabilities; my @elements = split(/ /, $args); # Get the FROM and SIZE parameters for my $e (@elements) { if($e =~ /^FROM:(.*)$/) { $from = $1; } elsif($e =~ /^SIZE=(\d+)$/) { $size = $1; } } # Validate the from address (only <> and a valid email address inside # <> are allowed, such as ) if (($from eq "<>") || (!$smtputf8 && $from =~ /^<([a-zA-Z0-9._%+-]+)\@(([a-zA-Z0-9-]+)\.)+([a-zA-Z]{2,4})>$/) || ($smtputf8 && $from =~ /^<([a-zA-Z0-9\x{80}-\x{ff}._%+-]+)\@(([a-zA-Z0-9\x{80}-\x{ff}-]+)\.)+([a-zA-Z]{2,4})>$/)) { my @found; my $valid = 1; # Check the capabilities for SIZE and if the specified size is # greater than the message size then reject it if (@found = grep /^SIZE (\d+)$/, @capabilities) { if ($found[0] =~ /^SIZE (\d+)$/) { if ($size > $1) { $valid = 0; } } } if(!$valid) { sendcontrol "552 Message size too large\r\n"; } else { sendcontrol "250 Sender OK\r\n"; } } else { sendcontrol "501 Invalid address\r\n"; } } return 0; } sub RCPT_smtp { my ($args) = @_; logmsg "RCPT_smtp got $args\n"; # Get the TO parameter if($args !~ /^TO:(.*)/) { sendcontrol "501 Unrecognized parameter\r\n"; } else { my $smtputf8 = grep /^SMTPUTF8$/, @capabilities; my $to = $1; # Validate the to address (only a valid email address inside <> is # allowed, such as ) if ((!$smtputf8 && $to =~ /^<([a-zA-Z0-9._%+-]+)\@(([a-zA-Z0-9-]+)\.)+([a-zA-Z]{2,4})>$/) || ($smtputf8 && $to =~ /^<([a-zA-Z0-9\x{80}-\x{ff}._%+-]+)\@(([a-zA-Z0-9\x{80}-\x{ff}-]+)\.)+([a-zA-Z]{2,4})>$/)) { sendcontrol "250 Recipient OK\r\n"; } else { sendcontrol "501 Invalid address\r\n"; } } return 0; } sub DATA_smtp { my ($args) = @_; if ($args) { sendcontrol "501 Unrecognized parameter\r\n"; } elsif ($smtp_client !~ /^(\d*)$/) { sendcontrol "501 Invalid arguments\r\n"; } else { sendcontrol "354 Show me the mail\r\n"; my $testno = $smtp_client; my $filename = "log/upload.$testno"; logmsg "Store test number $testno in $filename\n"; open(FILE, ">$filename") || return 0; # failed to open output my $line; my $ulsize=0; my $disc=0; my $raw; while (5 == (sysread \*SFREAD, $line, 5)) { if($line eq "DATA\n") { my $i; my $eob; sysread \*SFREAD, $i, 5; my $size = 0; if($i =~ /^([0-9a-fA-F]{4})\n/) { $size = hex($1); } read_mainsockf(\$line, $size); $ulsize += $size; print FILE $line if(!$nosave); $raw .= $line; if($raw =~ /(?:^|\x0d\x0a)\x2e\x0d\x0a/) { # end of data marker! $eob = 1; } logmsg "> Appending $size bytes to file\n"; if($eob) { logmsg "Found SMTP EOB marker\n"; last; } } elsif($line eq "DISC\n") { # disconnect! $disc=1; last; } else { logmsg "No support for: $line"; last; } } if($nosave) { print FILE "$ulsize bytes would've been stored here\n"; } close(FILE); logmsg "received $ulsize bytes upload\n"; sendcontrol "250 OK, data received!\r\n"; } return 0; } sub NOOP_smtp { my ($args) = @_; if($args) { sendcontrol "501 Unrecognized parameter\r\n"; } else { sendcontrol "250 OK\r\n"; } return 0; } sub RSET_smtp { my ($args) = @_; if($args) { sendcontrol "501 Unrecognized parameter\r\n"; } else { sendcontrol "250 Resetting\r\n"; } return 0; } sub HELP_smtp { my ($args) = @_; # One argument is optional if($args) { logmsg "HELP_smtp got $args\n"; } if($smtp_client eq "verifiedserver") { # This is the secret command that verifies that this actually is # the curl test server sendcontrol "214 WE ROOLZ: $$\r\n"; if($verbose) { print STDERR "FTPD: We returned proof we are the test server\n"; } logmsg "return proof we are we\n"; } else { sendcontrol "214-This server supports the following commands:\r\n"; if(@auth_mechs) { sendcontrol "214 HELO EHLO RCPT DATA RSET MAIL VRFY EXPN QUIT HELP AUTH\r\n"; } else { sendcontrol "214 HELO EHLO RCPT DATA RSET MAIL VRFY EXPN QUIT HELP\r\n"; } } return 0; } sub VRFY_smtp { my ($args) = @_; my ($username, $address) = split(/ /, $args, 2); logmsg "VRFY_smtp got $args\n"; if($username eq "") { sendcontrol "501 Unrecognized parameter\r\n"; } else { my $smtputf8 = grep /^SMTPUTF8$/, @capabilities; # Validate the username (only a valid local or external username is # allowed, such as user or user@example.com) if ((!$smtputf8 && $username =~ /^([a-zA-Z0-9._%+-]+)(\@(([a-zA-Z0-9-]+)\.)+([a-zA-Z]{2,4}))?$/) || ($smtputf8 && $username =~ /^([a-zA-Z0-9\x{80}-\x{ff}._%+-]+)(\@(([a-zA-Z0-9\x{80}-\x{ff}-]+)\.)+([a-zA-Z]{2,4}))?$/)) { my @data = getreplydata($smtp_client); if(!@data) { if ($username !~ /^([a-zA-Z0-9._%+-]+)\@(([a-zA-Z0-9-]+)\.)+([a-zA-Z]{2,4})$/) { push @data, "250 <$username\@example.com>\r\n" } else { push @data, "250 <$username>\r\n" } } for my $d (@data) { sendcontrol $d; } } else { sendcontrol "501 Invalid address\r\n"; } } return 0; } sub EXPN_smtp { my ($list_name) = @_; logmsg "EXPN_smtp got $list_name\n"; if(!$list_name) { sendcontrol "501 Unrecognized parameter\r\n"; } else { my @data = getreplydata($smtp_client); for my $d (@data) { sendcontrol $d; } } return 0; } sub QUIT_smtp { sendcontrol "221 curl $smtp_type server signing off\r\n"; return 0; } # What was deleted by IMAP STORE / POP3 DELE commands my @deleted; ################ ################ IMAP commands ################ # global to allow the command functions to read it my $cmdid; # what was picked by SELECT my $selected; # Any IMAP parameter can come in escaped and in double quotes. # This function is dumb (so far) and just removes the quotes if present. sub fix_imap_params { foreach (@_) { $_ = $1 if /^"(.*)"$/; } } sub CAPABILITY_imap { if((!@capabilities) && (!@auth_mechs)) { sendcontrol "$cmdid BAD Command\r\n"; } else { my $data; # Calculate the CAPABILITY response $data = "* CAPABILITY IMAP4"; for my $c (@capabilities) { $data .= " $c"; } for my $am (@auth_mechs) { $data .= " AUTH=$am"; } $data .= " pingpong test server\r\n"; # Send the CAPABILITY response sendcontrol $data; sendcontrol "$cmdid OK CAPABILITY completed\r\n"; } return 0; } sub LOGIN_imap { my ($args) = @_; my ($user, $password) = split(/ /, $args, 2); fix_imap_params($user, $password); logmsg "LOGIN_imap got $args\n"; if ($user eq "") { sendcontrol "$cmdid BAD Command Argument\r\n"; } else { sendcontrol "$cmdid OK LOGIN completed\r\n"; } return 0; } sub SELECT_imap { my ($mailbox) = @_; fix_imap_params($mailbox); logmsg "SELECT_imap got test $mailbox\n"; if($mailbox eq "") { sendcontrol "$cmdid BAD Command Argument\r\n"; } else { # Example from RFC 3501, 6.3.1. SELECT Command sendcontrol "* 172 EXISTS\r\n"; sendcontrol "* 1 RECENT\r\n"; sendcontrol "* OK [UNSEEN 12] Message 12 is first unseen\r\n"; sendcontrol "* OK [UIDVALIDITY 3857529045] UIDs valid\r\n"; sendcontrol "* OK [UIDNEXT 4392] Predicted next UID\r\n"; sendcontrol "* FLAGS (\\Answered \\Flagged \\Deleted \\Seen \\Draft)\r\n"; sendcontrol "* OK [PERMANENTFLAGS (\\Deleted \\Seen \\*)] Limited\r\n"; sendcontrol "$cmdid OK [READ-WRITE] SELECT completed\r\n"; $selected = $mailbox; } return 0; } sub FETCH_imap { my ($args) = @_; my ($uid, $how) = split(/ /, $args, 2); fix_imap_params($uid, $how); logmsg "FETCH_imap got $args\n"; if ($selected eq "") { sendcontrol "$cmdid BAD Command received in Invalid state\r\n"; } else { my @data; my $size; if($selected eq "verifiedserver") { # this is the secret command that verifies that this actually is # the curl test server my $response = "WE ROOLZ: $$\r\n"; if($verbose) { print STDERR "FTPD: We returned proof we are the test server\n"; } $data[0] = $response; logmsg "return proof we are we\n"; } else { # send mail content logmsg "retrieve a mail\n"; @data = getreplydata($selected); } for (@data) { $size += length($_); } sendcontrol "* $uid FETCH ($how {$size}\r\n"; for my $d (@data) { sendcontrol $d; } sendcontrol ")\r\n"; sendcontrol "$cmdid OK FETCH completed\r\n"; } return 0; } sub APPEND_imap { my ($args) = @_; logmsg "APPEND_imap got $args\r\n"; $args =~ /^([^ ]+) [^{]*\{(\d+)\}$/; my ($mailbox, $size) = ($1, $2); fix_imap_params($mailbox); if($mailbox eq "") { sendcontrol "$cmdid BAD Command Argument\r\n"; } else { sendcontrol "+ Ready for literal data\r\n"; my $testno = $mailbox; my $filename = "log/upload.$testno"; logmsg "Store test number $testno in $filename\n"; open(FILE, ">$filename") || return 0; # failed to open output my $received = 0; my $line; while(5 == (sysread \*SFREAD, $line, 5)) { if($line eq "DATA\n") { sysread \*SFREAD, $line, 5; my $chunksize = 0; if($line =~ /^([0-9a-fA-F]{4})\n/) { $chunksize = hex($1); } read_mainsockf(\$line, $chunksize); my $left = $size - $received; my $datasize = ($left > $chunksize) ? $chunksize : $left; if($datasize > 0) { logmsg "> Appending $datasize bytes to file\n"; print FILE substr($line, 0, $datasize) if(!$nosave); $line = substr($line, $datasize); $received += $datasize; if($received == $size) { logmsg "Received all data, waiting for final CRLF.\n"; } } if($received == $size && $line eq "\r\n") { last; } } elsif($line eq "DISC\n") { logmsg "Unexpected disconnect!\n"; last; } else { logmsg "No support for: $line"; last; } } if($nosave) { print FILE "$size bytes would've been stored here\n"; } close(FILE); logmsg "received $size bytes upload\n"; sendcontrol "$cmdid OK APPEND completed\r\n"; } return 0; } sub STORE_imap { my ($args) = @_; my ($uid, $what, $value) = split(/ /, $args, 3); fix_imap_params($uid); logmsg "STORE_imap got $args\n"; if ($selected eq "") { sendcontrol "$cmdid BAD Command received in Invalid state\r\n"; } elsif (($uid eq "") || ($what ne "+Flags") || ($value eq "")) { sendcontrol "$cmdid BAD Command Argument\r\n"; } else { if($value eq "\\Deleted") { push(@deleted, $uid); } sendcontrol "* $uid FETCH (FLAGS (\\Seen $value))\r\n"; sendcontrol "$cmdid OK STORE completed\r\n"; } return 0; } sub LIST_imap { my ($args) = @_; my ($reference, $mailbox) = split(/ /, $args, 2); fix_imap_params($reference, $mailbox); logmsg "LIST_imap got $args\n"; if ($reference eq "") { sendcontrol "$cmdid BAD Command Argument\r\n"; } elsif ($reference eq "verifiedserver") { # this is the secret command that verifies that this actually is # the curl test server sendcontrol "* LIST () \"/\" \"WE ROOLZ: $$\"\r\n"; sendcontrol "$cmdid OK LIST Completed\r\n"; if($verbose) { print STDERR "FTPD: We returned proof we are the test server\n"; } logmsg "return proof we are we\n"; } else { my @data = getreplydata($reference); for my $d (@data) { sendcontrol $d; } sendcontrol "$cmdid OK LIST Completed\r\n"; } return 0; } sub LSUB_imap { my ($args) = @_; my ($reference, $mailbox) = split(/ /, $args, 2); fix_imap_params($reference, $mailbox); logmsg "LSUB_imap got $args\n"; if ($reference eq "") { sendcontrol "$cmdid BAD Command Argument\r\n"; } else { my @data = getreplydata($reference); for my $d (@data) { sendcontrol $d; } sendcontrol "$cmdid OK LSUB Completed\r\n"; } return 0; } sub EXAMINE_imap { my ($mailbox) = @_; fix_imap_params($mailbox); logmsg "EXAMINE_imap got $mailbox\n"; if ($mailbox eq "") { sendcontrol "$cmdid BAD Command Argument\r\n"; } else { my @data = getreplydata($mailbox); for my $d (@data) { sendcontrol $d; } sendcontrol "$cmdid OK [READ-ONLY] EXAMINE completed\r\n"; } return 0; } sub STATUS_imap { my ($args) = @_; my ($mailbox, $what) = split(/ /, $args, 2); fix_imap_params($mailbox); logmsg "STATUS_imap got $args\n"; if ($mailbox eq "") { sendcontrol "$cmdid BAD Command Argument\r\n"; } else { my @data = getreplydata($mailbox); for my $d (@data) { sendcontrol $d; } sendcontrol "$cmdid OK STATUS completed\r\n"; } return 0; } sub SEARCH_imap { my ($what) = @_; fix_imap_params($what); logmsg "SEARCH_imap got $what\n"; if ($selected eq "") { sendcontrol "$cmdid BAD Command received in Invalid state\r\n"; } elsif ($what eq "") { sendcontrol "$cmdid BAD Command Argument\r\n"; } else { my @data = getreplydata($selected); for my $d (@data) { sendcontrol $d; } sendcontrol "$cmdid OK SEARCH completed\r\n"; } return 0; } sub CREATE_imap { my ($args) = @_; fix_imap_params($args); logmsg "CREATE_imap got $args\n"; if ($args eq "") { sendcontrol "$cmdid BAD Command Argument\r\n"; } else { sendcontrol "$cmdid OK CREATE completed\r\n"; } return 0; } sub DELETE_imap { my ($args) = @_; fix_imap_params($args); logmsg "DELETE_imap got $args\n"; if ($args eq "") { sendcontrol "$cmdid BAD Command Argument\r\n"; } else { sendcontrol "$cmdid OK DELETE completed\r\n"; } return 0; } sub RENAME_imap { my ($args) = @_; my ($from_mailbox, $to_mailbox) = split(/ /, $args, 2); fix_imap_params($from_mailbox, $to_mailbox); logmsg "RENAME_imap got $args\n"; if (($from_mailbox eq "") || ($to_mailbox eq "")) { sendcontrol "$cmdid BAD Command Argument\r\n"; } else { sendcontrol "$cmdid OK RENAME completed\r\n"; } return 0; } sub CHECK_imap { if ($selected eq "") { sendcontrol "$cmdid BAD Command received in Invalid state\r\n"; } else { sendcontrol "$cmdid OK CHECK completed\r\n"; } return 0; } sub CLOSE_imap { if ($selected eq "") { sendcontrol "$cmdid BAD Command received in Invalid state\r\n"; } elsif (!@deleted) { sendcontrol "$cmdid BAD Command Argument\r\n"; } else { sendcontrol "$cmdid OK CLOSE completed\r\n"; @deleted = (); } return 0; } sub EXPUNGE_imap { if ($selected eq "") { sendcontrol "$cmdid BAD Command received in Invalid state\r\n"; } else { if (!@deleted) { # Report the number of existing messages as per the SELECT # command sendcontrol "* 172 EXISTS\r\n"; } else { # Report the message UIDs being deleted for my $d (@deleted) { sendcontrol "* $d EXPUNGE\r\n"; } @deleted = (); } sendcontrol "$cmdid OK EXPUNGE completed\r\n"; } return 0; } sub COPY_imap { my ($args) = @_; my ($uid, $mailbox) = split(/ /, $args, 2); fix_imap_params($uid, $mailbox); logmsg "COPY_imap got $args\n"; if (($uid eq "") || ($mailbox eq "")) { sendcontrol "$cmdid BAD Command Argument\r\n"; } else { sendcontrol "$cmdid OK COPY completed\r\n"; } return 0; } sub UID_imap { my ($args) = @_; my ($command) = split(/ /, $args, 1); fix_imap_params($command); logmsg "UID_imap got $args\n"; if ($selected eq "") { sendcontrol "$cmdid BAD Command received in Invalid state\r\n"; } elsif (substr($command, 0, 5) eq "FETCH"){ my $func = $commandfunc{"FETCH"}; if($func) { &$func($args, $command); } } elsif (($command ne "COPY") && ($command ne "STORE") && ($command ne "SEARCH")) { sendcontrol "$cmdid BAD Command Argument\r\n"; } else { my @data = getreplydata($selected); for my $d (@data) { sendcontrol $d; } sendcontrol "$cmdid OK $command completed\r\n"; } return 0; } sub NOOP_imap { my ($args) = @_; my @data = ( "* 22 EXPUNGE\r\n", "* 23 EXISTS\r\n", "* 3 RECENT\r\n", "* 14 FETCH (FLAGS (\\Seen \\Deleted))\r\n", ); if ($args) { sendcontrol "$cmdid BAD Command Argument\r\n"; } else { for my $d (@data) { sendcontrol $d; } sendcontrol "$cmdid OK NOOP completed\r\n"; } return 0; } sub LOGOUT_imap { sendcontrol "* BYE curl IMAP server signing off\r\n"; sendcontrol "$cmdid OK LOGOUT completed\r\n"; return 0; } ################ ################ POP3 commands ################ # Who is attempting to log in my $username; sub CAPA_pop3 { my @list = (); my $mechs; # Calculate the capability list based on the specified capabilities # (except APOP) and any authentication mechanisms for my $c (@capabilities) { push @list, "$c\r\n" unless $c eq "APOP"; } for my $am (@auth_mechs) { if(!$mechs) { $mechs = "$am"; } else { $mechs .= " $am"; } } if($mechs) { push @list, "SASL $mechs\r\n"; } if(!@list) { sendcontrol "-ERR Unrecognized command\r\n"; } else { my @data = (); # Calculate the CAPA response push @data, "+OK List of capabilities follows\r\n"; for my $l (@list) { push @data, "$l\r\n"; } push @data, "IMPLEMENTATION POP3 pingpong test server\r\n"; # Send the CAPA response for my $d (@data) { sendcontrol $d; } # End with the magic 3-byte end of listing marker sendcontrol ".\r\n"; } return 0; } sub APOP_pop3 { my ($args) = @_; my ($user, $secret) = split(/ /, $args, 2); if (!grep /^APOP$/, @capabilities) { sendcontrol "-ERR Unrecognized command\r\n"; } elsif (($user eq "") || ($secret eq "")) { sendcontrol "-ERR Protocol error\r\n"; } else { my $digest = Digest::MD5::md5_hex($POP3_TIMESTAMP, $TEXT_PASSWORD); if ($secret ne $digest) { sendcontrol "-ERR Login failure\r\n"; } else { sendcontrol "+OK Login successful\r\n"; } } return 0; } sub AUTH_pop3 { if(!@auth_mechs) { sendcontrol "-ERR Unrecognized command\r\n"; } else { my @data = (); # Calculate the AUTH response push @data, "+OK List of supported mechanisms follows\r\n"; for my $am (@auth_mechs) { push @data, "$am\r\n"; } # Send the AUTH response for my $d (@data) { sendcontrol $d; } # End with the magic 3-byte end of listing marker sendcontrol ".\r\n"; } return 0; } sub USER_pop3 { my ($user) = @_; logmsg "USER_pop3 got $user\n"; if (!$user) { sendcontrol "-ERR Protocol error\r\n"; } else { $username = $user; sendcontrol "+OK\r\n"; } return 0; } sub PASS_pop3 { my ($password) = @_; logmsg "PASS_pop3 got $password\n"; sendcontrol "+OK Login successful\r\n"; return 0; } sub RETR_pop3 { my ($msgid) = @_; my @data; if($msgid =~ /^verifiedserver$/) { # this is the secret command that verifies that this actually is # the curl test server my $response = "WE ROOLZ: $$\r\n"; if($verbose) { print STDERR "FTPD: We returned proof we are the test server\n"; } $data[0] = $response; logmsg "return proof we are we\n"; } else { # send mail content logmsg "retrieve a mail\n"; @data = getreplydata($msgid); } sendcontrol "+OK Mail transfer starts\r\n"; for my $d (@data) { sendcontrol $d; } # end with the magic 3-byte end of mail marker, assumes that the # mail body ends with a CRLF! sendcontrol ".\r\n"; return 0; } sub LIST_pop3 { # This is a built-in fake-message list my @data = ( "1 100\r\n", "2 4294967400\r\n", # > 4 GB "3 200\r\n", ); logmsg "retrieve a message list\n"; sendcontrol "+OK Listing starts\r\n"; for my $d (@data) { sendcontrol $d; } # End with the magic 3-byte end of listing marker sendcontrol ".\r\n"; return 0; } sub DELE_pop3 { my ($msgid) = @_; logmsg "DELE_pop3 got $msgid\n"; if (!$msgid) { sendcontrol "-ERR Protocol error\r\n"; } else { push (@deleted, $msgid); sendcontrol "+OK\r\n"; } return 0; } sub STAT_pop3 { my ($args) = @_; if ($args) { sendcontrol "-ERR Protocol error\r\n"; } else { # Send statistics for the built-in fake message list as # detailed in the LIST_pop3 function above sendcontrol "+OK 3 4294967800\r\n"; } return 0; } sub NOOP_pop3 { my ($args) = @_; if ($args) { sendcontrol "-ERR Protocol error\r\n"; } else { sendcontrol "+OK\r\n"; } return 0; } sub UIDL_pop3 { # This is a built-in fake-message UID list my @data = ( "1 1\r\n", "2 2\r\n", "3 4\r\n", # Note that UID 3 is a simulated "deleted" message ); if (!grep /^UIDL$/, @capabilities) { sendcontrol "-ERR Unrecognized command\r\n"; } else { logmsg "retrieve a message UID list\n"; sendcontrol "+OK Listing starts\r\n"; for my $d (@data) { sendcontrol $d; } # End with the magic 3-byte end of listing marker sendcontrol ".\r\n"; } return 0; } sub TOP_pop3 { my ($args) = @_; my ($msgid, $lines) = split(/ /, $args, 2); logmsg "TOP_pop3 got $args\n"; if (!grep /^TOP$/, @capabilities) { sendcontrol "-ERR Unrecognized command\r\n"; } elsif (($msgid eq "") || ($lines eq "")) { sendcontrol "-ERR Protocol error\r\n"; } else { if ($lines == "0") { logmsg "retrieve header of mail\n"; } else { logmsg "retrieve top $lines lines of mail\n"; } my @data = getreplydata($msgid); sendcontrol "+OK Mail transfer starts\r\n"; # Send mail content for my $d (@data) { sendcontrol $d; } # End with the magic 3-byte end of mail marker, assumes that the # mail body ends with a CRLF! sendcontrol ".\r\n"; } return 0; } sub RSET_pop3 { my ($args) = @_; if ($args) { sendcontrol "-ERR Protocol error\r\n"; } else { if (@deleted) { logmsg "resetting @deleted message(s)\n"; @deleted = (); } sendcontrol "+OK\r\n"; } return 0; } sub QUIT_pop3 { if(@deleted) { logmsg "deleting @deleted message(s)\n"; @deleted = (); } sendcontrol "+OK curl POP3 server signing off\r\n"; return 0; } ################ ################ FTP commands ################ my $rest=0; sub REST_ftp { $rest = $_[0]; logmsg "Set REST position to $rest\n" } sub switch_directory_goto { my $target_dir = $_; if(!$ftptargetdir) { $ftptargetdir = "/"; } if($target_dir eq "") { $ftptargetdir = "/"; } elsif($target_dir eq "..") { if($ftptargetdir eq "/") { $ftptargetdir = "/"; } else { $ftptargetdir =~ s/[[:alnum:]]+\/$//; } } else { $ftptargetdir .= $target_dir . "/"; } } sub switch_directory { my $target_dir = $_[0]; if($target_dir =~ /^test-(\d+)/) { $cwd_testno = $1; } elsif($target_dir eq "/") { $ftptargetdir = "/"; } else { my @dirs = split("/", $target_dir); for(@dirs) { switch_directory_goto($_); } } } sub CWD_ftp { my ($folder, $fullcommand) = $_[0]; switch_directory($folder); if($ftptargetdir =~ /^\/fully_simulated/) { $ftplistparserstate = "enabled"; } else { undef $ftplistparserstate; } } sub PWD_ftp { my $mydir; $mydir = $ftptargetdir ? $ftptargetdir : "/"; if($mydir ne "/") { $mydir =~ s/\/$//; } sendcontrol "257 \"$mydir\" is current directory\r\n"; } sub LIST_ftp { # print "150 ASCII data connection for /bin/ls (193.15.23.1,59196) (0 bytes)\r\n"; # this is a built-in fake-dir ;-) my @ftpdir=("total 20\r\n", "drwxr-xr-x 8 98 98 512 Oct 22 13:06 .\r\n", "drwxr-xr-x 8 98 98 512 Oct 22 13:06 ..\r\n", "drwxr-xr-x 2 98 98 512 May 2 1996 .NeXT\r\n", "-r--r--r-- 1 0 1 35 Jul 16 1996 README\r\n", "lrwxrwxrwx 1 0 1 7 Dec 9 1999 bin -> usr/bin\r\n", "dr-xr-xr-x 2 0 1 512 Oct 1 1997 dev\r\n", "drwxrwxrwx 2 98 98 512 May 29 16:04 download.html\r\n", "dr-xr-xr-x 2 0 1 512 Nov 30 1995 etc\r\n", "drwxrwxrwx 2 98 1 512 Oct 30 14:33 pub\r\n", "dr-xr-xr-x 5 0 1 512 Oct 1 1997 usr\r\n"); if($datasockf_conn eq 'no') { if($nodataconn425) { sendcontrol "150 Opening data connection\r\n"; sendcontrol "425 Can't open data connection\r\n"; } elsif($nodataconn421) { sendcontrol "150 Opening data connection\r\n"; sendcontrol "421 Connection timed out\r\n"; } elsif($nodataconn150) { sendcontrol "150 Opening data connection\r\n"; # client shall timeout } else { # client shall timeout } return 0; } if($ftplistparserstate) { @ftpdir = ftp_contentlist($ftptargetdir); } logmsg "pass LIST data on data connection\n"; if($cwd_testno) { loadtest("$srcdir/data/test$cwd_testno"); my @data = getpart("reply", "data"); for(@data) { my $send = $_; # convert all \n to \r\n for ASCII transfer $send =~ s/\r\n/\n/g; $send =~ s/\n/\r\n/g; logmsg "send $send as data\n"; senddata $send; } $cwd_testno = 0; # forget it again } else { # old hard-coded style for(@ftpdir) { senddata $_; } } close_dataconn(0); sendcontrol "226 ASCII transfer complete\r\n"; return 0; } sub NLST_ftp { my @ftpdir=("file", "with space", "fake", "..", " ..", "funny", "README"); if($datasockf_conn eq 'no') { if($nodataconn425) { sendcontrol "150 Opening data connection\r\n"; sendcontrol "425 Can't open data connection\r\n"; } elsif($nodataconn421) { sendcontrol "150 Opening data connection\r\n"; sendcontrol "421 Connection timed out\r\n"; } elsif($nodataconn150) { sendcontrol "150 Opening data connection\r\n"; # client shall timeout } else { # client shall timeout } return 0; } logmsg "pass NLST data on data connection\n"; for(@ftpdir) { senddata "$_\r\n"; } close_dataconn(0); sendcontrol "226 ASCII transfer complete\r\n"; return 0; } sub MDTM_ftp { my $testno = $_[0]; my $testpart = ""; if ($testno > 10000) { $testpart = $testno % 10000; $testno = int($testno / 10000); } loadtest("$srcdir/data/test$testno"); my @data = getpart("reply", "mdtm"); my $reply = $data[0]; chomp $reply if($reply); if($reply && ($reply =~ /^[+-]?\d+$/) && ($reply < 0)) { sendcontrol "550 $testno: no such file.\r\n"; } elsif($reply) { sendcontrol "$reply\r\n"; } else { sendcontrol "500 MDTM: no such command.\r\n"; } return 0; } sub SIZE_ftp { my $testno = $_[0]; if($ftplistparserstate) { my $size = wildcard_filesize($ftptargetdir, $testno); if($size == -1) { sendcontrol "550 $testno: No such file or directory.\r\n"; } else { sendcontrol "213 $size\r\n"; } return 0; } if($testno =~ /^verifiedserver$/) { my $response = "WE ROOLZ: $$\r\n"; my $size = length($response); sendcontrol "213 $size\r\n"; return 0; } if($testno =~ /(\d+)\/?$/) { $testno = $1; } else { print STDERR "SIZE_ftp: invalid test number: $testno\n"; return 1; } my $testpart = ""; if($testno > 10000) { $testpart = $testno % 10000; $testno = int($testno / 10000); } loadtest("$srcdir/data/test$testno"); my @data = getpart("reply", "size"); my $size = $data[0]; if($size) { if($size > -1) { sendcontrol "213 $size\r\n"; } else { sendcontrol "550 $testno: No such file or directory.\r\n"; } } else { $size=0; @data = getpart("reply", "data$testpart"); for(@data) { $size += length($_); } if($size) { sendcontrol "213 $size\r\n"; } else { sendcontrol "550 $testno: No such file or directory.\r\n"; } } return 0; } sub RETR_ftp { my ($testno) = @_; if($datasockf_conn eq 'no') { if($nodataconn425) { sendcontrol "150 Opening data connection\r\n"; sendcontrol "425 Can't open data connection\r\n"; } elsif($nodataconn421) { sendcontrol "150 Opening data connection\r\n"; sendcontrol "421 Connection timed out\r\n"; } elsif($nodataconn150) { sendcontrol "150 Opening data connection\r\n"; # client shall timeout } else { # client shall timeout } return 0; } if($ftplistparserstate) { my @content = wildcard_getfile($ftptargetdir, $testno); if($content[0] == -1) { #file not found } else { my $size = length $content[1]; sendcontrol "150 Binary data connection for $testno ($size bytes).\r\n", senddata $content[1]; close_dataconn(0); sendcontrol "226 File transfer complete\r\n"; } return 0; } if($testno =~ /^verifiedserver$/) { # this is the secret command that verifies that this actually is # the curl test server my $response = "WE ROOLZ: $$\r\n"; my $len = length($response); sendcontrol "150 Binary junk ($len bytes).\r\n"; senddata "WE ROOLZ: $$\r\n"; close_dataconn(0); sendcontrol "226 File transfer complete\r\n"; if($verbose) { print STDERR "FTPD: We returned proof we are the test server\n"; } return 0; } $testno =~ s/^([^0-9]*)//; my $testpart = ""; if ($testno > 10000) { $testpart = $testno % 10000; $testno = int($testno / 10000); } loadtest("$srcdir/data/test$testno"); my @data = getpart("reply", "data$testpart"); my $size=0; for(@data) { $size += length($_); } my %hash = getpartattr("reply", "data$testpart"); if($size || $hash{'sendzero'}) { if($rest) { # move read pointer forward $size -= $rest; logmsg "REST $rest was removed from size, makes $size left\n"; $rest = 0; # reset REST offset again } if($retrweirdo) { sendcontrol "150 Binary data connection for $testno () ($size bytes).\r\n", "226 File transfer complete\r\n"; for(@data) { my $send = $_; senddata $send; } close_dataconn(0); $retrweirdo=0; # switch off the weirdo again! } else { my $sz = "($size bytes)"; if($retrnosize) { $sz = "size?"; } sendcontrol "150 Binary data connection for $testno () $sz.\r\n"; for(@data) { my $send = $_; senddata $send; } close_dataconn(0); sendcontrol "226 File transfer complete\r\n"; } } else { sendcontrol "550 $testno: No such file or directory.\r\n"; } return 0; } sub STOR_ftp { my $testno=$_[0]; my $filename = "log/upload.$testno"; if($datasockf_conn eq 'no') { if($nodataconn425) { sendcontrol "150 Opening data connection\r\n"; sendcontrol "425 Can't open data connection\r\n"; } elsif($nodataconn421) { sendcontrol "150 Opening data connection\r\n"; sendcontrol "421 Connection timed out\r\n"; } elsif($nodataconn150) { sendcontrol "150 Opening data connection\r\n"; # client shall timeout } else { # client shall timeout } return 0; } logmsg "STOR test number $testno in $filename\n"; sendcontrol "125 Gimme gimme gimme!\r\n"; open(FILE, ">$filename") || return 0; # failed to open output my $line; my $ulsize=0; my $disc=0; while (5 == (sysread DREAD, $line, 5)) { if($line eq "DATA\n") { my $i; sysread DREAD, $i, 5; my $size = 0; if($i =~ /^([0-9a-fA-F]{4})\n/) { $size = hex($1); } read_datasockf(\$line, $size); #print STDERR " GOT: $size bytes\n"; $ulsize += $size; print FILE $line if(!$nosave); logmsg "> Appending $size bytes to file\n"; } elsif($line eq "DISC\n") { # disconnect! $disc=1; last; } else { logmsg "No support for: $line"; last; } } if($nosave) { print FILE "$ulsize bytes would've been stored here\n"; } close(FILE); close_dataconn($disc); logmsg "received $ulsize bytes upload\n"; sendcontrol "226 File transfer complete\r\n"; return 0; } sub PASV_ftp { my ($arg, $cmd)=@_; my $pasvport; my $bindonly = ($nodataconn) ? '--bindonly' : ''; # kill previous data connection sockfilt when alive if($datasockf_runs eq 'yes') { killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data'); logmsg "DATA sockfilt for $datasockf_mode data channel killed\n"; } datasockf_state('STOPPED'); logmsg "====> Passive DATA channel requested by client\n"; logmsg "DATA sockfilt for passive data channel starting...\n"; # We fire up a new sockfilt to do the data transfer for us. my $datasockfcmd = "./server/sockfilt".exe_ext('SRV')." " . "--ipv$ipvnum $bindonly --port 0 " . "--pidfile \"$datasockf_pidfile\" " . "--logfile \"$datasockf_logfile\""; $slavepid = open2(\*DREAD, \*DWRITE, $datasockfcmd); if($nodataconn) { datasockf_state('PASSIVE_NODATACONN'); } else { datasockf_state('PASSIVE'); } print STDERR "$datasockfcmd\n" if($verbose); print DWRITE "PING\n"; my $pong; sysread_or_die(\*DREAD, \$pong, 5); if($pong =~ /^FAIL/) { logmsg "DATA sockfilt said: FAIL\n"; logmsg "DATA sockfilt for passive data channel failed\n"; logmsg "DATA sockfilt not running\n"; datasockf_state('STOPPED'); sendcontrol "500 no free ports!\r\n"; return; } elsif($pong !~ /^PONG/) { logmsg "DATA sockfilt unexpected response: $pong\n"; logmsg "DATA sockfilt for passive data channel failed\n"; logmsg "DATA sockfilt killed now\n"; killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data'); logmsg "DATA sockfilt not running\n"; datasockf_state('STOPPED'); sendcontrol "500 no free ports!\r\n"; return; } logmsg "DATA sockfilt for passive data channel started (pid $slavepid)\n"; # Find out on what port we listen on or have bound my $i; print DWRITE "PORT\n"; # READ the response code sysread_or_die(\*DREAD, \$i, 5); # READ the response size sysread_or_die(\*DREAD, \$i, 5); my $size = 0; if($i =~ /^([0-9a-fA-F]{4})\n/) { $size = hex($1); } # READ the response data read_datasockf(\$i, $size); # The data is in the format # IPvX/NNN if($i =~ /IPv(\d)\/(\d+)/) { # FIX: deal with IP protocol version $pasvport = $2; } if(!$pasvport) { logmsg "DATA sockfilt unknown listener port\n"; logmsg "DATA sockfilt for passive data channel failed\n"; logmsg "DATA sockfilt killed now\n"; killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data'); logmsg "DATA sockfilt not running\n"; datasockf_state('STOPPED'); sendcontrol "500 no free ports!\r\n"; return; } if($nodataconn) { my $str = nodataconn_str(); logmsg "DATA sockfilt for passive data channel ($str) bound on port ". "$pasvport\n"; } else { logmsg "DATA sockfilt for passive data channel listens on port ". "$pasvport\n"; } if($cmd ne "EPSV") { # PASV reply my $p=$listenaddr; $p =~ s/\./,/g; if($pasvbadip) { $p="1,2,3,4"; } sendcontrol sprintf("227 Entering Passive Mode ($p,%d,%d)\n", int($pasvport/256), int($pasvport%256)); } else { # EPSV reply sendcontrol sprintf("229 Entering Passive Mode (|||%d|)\n", $pasvport); } logmsg "Client has been notified that DATA conn ". "will be accepted on port $pasvport\n"; if($nodataconn) { my $str = nodataconn_str(); logmsg "====> Client fooled ($str)\n"; return; } eval { local $SIG{ALRM} = sub { die "alarm\n" }; # assume swift operations unless explicitly slow alarm ($datadelay?20:10); # Wait for 'CNCT' my $input; # FIX: Monitor ctrl conn for disconnect while(sysread(DREAD, $input, 5)) { if($input !~ /^CNCT/) { # we wait for a connected client logmsg "Odd, we got $input from client\n"; next; } logmsg "Client connects to port $pasvport\n"; last; } alarm 0; }; if ($@) { # timed out logmsg "$srvrname server timed out awaiting data connection ". "on port $pasvport\n"; logmsg "accept failed or connection not even attempted\n"; logmsg "DATA sockfilt killed now\n"; killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data'); logmsg "DATA sockfilt not running\n"; datasockf_state('STOPPED'); return; } else { logmsg "====> Client established passive DATA connection ". "on port $pasvport\n"; } return; } # # Support both PORT and EPRT here. # sub PORT_ftp { my ($arg, $cmd) = @_; my $port; my $addr; # kill previous data connection sockfilt when alive if($datasockf_runs eq 'yes') { killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data'); logmsg "DATA sockfilt for $datasockf_mode data channel killed\n"; } datasockf_state('STOPPED'); logmsg "====> Active DATA channel requested by client\n"; # We always ignore the given IP and use localhost. if($cmd eq "PORT") { if($arg !~ /(\d+),(\d+),(\d+),(\d+),(\d+),(\d+)/) { logmsg "DATA sockfilt for active data channel not started ". "(bad PORT-line: $arg)\n"; sendcontrol "500 silly you, go away\r\n"; return; } $port = ($5<<8)+$6; $addr = "$1.$2.$3.$4"; } # EPRT |2|::1|49706| elsif($cmd eq "EPRT") { if($arg !~ /(\d+)\|([^\|]+)\|(\d+)/) { logmsg "DATA sockfilt for active data channel not started ". "(bad EPRT-line: $arg)\n"; sendcontrol "500 silly you, go away\r\n"; return; } sendcontrol "200 Thanks for dropping by. We contact you later\r\n"; $port = $3; $addr = $2; } else { logmsg "DATA sockfilt for active data channel not started ". "(invalid command: $cmd)\n"; sendcontrol "500 we don't like $cmd now\r\n"; return; } if(!$port || $port > 65535) { logmsg "DATA sockfilt for active data channel not started ". "(illegal PORT number: $port)\n"; return; } if($nodataconn) { my $str = nodataconn_str(); logmsg "DATA sockfilt for active data channel not started ($str)\n"; datasockf_state('ACTIVE_NODATACONN'); logmsg "====> Active DATA channel not established\n"; return; } logmsg "DATA sockfilt for active data channel starting...\n"; # We fire up a new sockfilt to do the data transfer for us. my $datasockfcmd = "./server/sockfilt".exe_ext('SRV')." " . "--ipv$ipvnum --connect $port --addr \"$addr\" " . "--pidfile \"$datasockf_pidfile\" " . "--logfile \"$datasockf_logfile\""; $slavepid = open2(\*DREAD, \*DWRITE, $datasockfcmd); datasockf_state('ACTIVE'); print STDERR "$datasockfcmd\n" if($verbose); print DWRITE "PING\n"; my $pong; sysread_or_die(\*DREAD, \$pong, 5); if($pong =~ /^FAIL/) { logmsg "DATA sockfilt said: FAIL\n"; logmsg "DATA sockfilt for active data channel failed\n"; logmsg "DATA sockfilt not running\n"; datasockf_state('STOPPED'); # client shall timeout awaiting connection from server return; } elsif($pong !~ /^PONG/) { logmsg "DATA sockfilt unexpected response: $pong\n"; logmsg "DATA sockfilt for active data channel failed\n"; logmsg "DATA sockfilt killed now\n"; killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data'); logmsg "DATA sockfilt not running\n"; datasockf_state('STOPPED'); # client shall timeout awaiting connection from server return; } logmsg "DATA sockfilt for active data channel started (pid $slavepid)\n"; logmsg "====> Active DATA channel connected to client port $port\n"; return; } #********************************************************************** # datasockf_state is used to change variables that keep state info # relative to the FTP secondary or data sockfilt process as soon as # one of the five possible stable states is reached. Variables that # are modified by this sub may be checked independently but should # not be changed except by calling this sub. # sub datasockf_state { my $state = $_[0]; if($state eq 'STOPPED') { # Data sockfilter initial state, not running, # not connected and not used. $datasockf_state = $state; $datasockf_mode = 'none'; $datasockf_runs = 'no'; $datasockf_conn = 'no'; } elsif($state eq 'PASSIVE') { # Data sockfilter accepted connection from client. $datasockf_state = $state; $datasockf_mode = 'passive'; $datasockf_runs = 'yes'; $datasockf_conn = 'yes'; } elsif($state eq 'ACTIVE') { # Data sockfilter has connected to client. $datasockf_state = $state; $datasockf_mode = 'active'; $datasockf_runs = 'yes'; $datasockf_conn = 'yes'; } elsif($state eq 'PASSIVE_NODATACONN') { # Data sockfilter bound port without listening, # client won't be able to establish data connection. $datasockf_state = $state; $datasockf_mode = 'passive'; $datasockf_runs = 'yes'; $datasockf_conn = 'no'; } elsif($state eq 'ACTIVE_NODATACONN') { # Data sockfilter does not even run, # client awaits data connection from server in vain. $datasockf_state = $state; $datasockf_mode = 'active'; $datasockf_runs = 'no'; $datasockf_conn = 'no'; } else { die "Internal error. Unknown datasockf state: $state!"; } } #********************************************************************** # nodataconn_str returns string of effective nodataconn command. Notice # that $nodataconn may be set alone or in addition to a $nodataconnXXX. # sub nodataconn_str { my $str; # order matters $str = 'NODATACONN' if($nodataconn); $str = 'NODATACONN425' if($nodataconn425); $str = 'NODATACONN421' if($nodataconn421); $str = 'NODATACONN150' if($nodataconn150); return "$str"; } #********************************************************************** # customize configures test server operation for each curl test, reading # configuration commands/parameters from server commands file each time # a new client control connection is established with the test server. # On success returns 1, otherwise zero. # sub customize { $ctrldelay = 0; # default is no throttling of the ctrl stream $datadelay = 0; # default is no throttling of the data stream $retrweirdo = 0; # default is no use of RETRWEIRDO $retrnosize = 0; # default is no use of RETRNOSIZE $pasvbadip = 0; # default is no use of PASVBADIP $nosave = 0; # default is to actually save uploaded data to file $nodataconn = 0; # default is to establish or accept data channel $nodataconn425 = 0; # default is to not send 425 without data channel $nodataconn421 = 0; # default is to not send 421 without data channel $nodataconn150 = 0; # default is to not send 150 without data channel @capabilities = (); # default is to not support capability commands @auth_mechs = (); # default is to not support authentication commands %fulltextreply = ();# %commandreply = (); # %customcount = (); # %delayreply = (); # open(CUSTOM, ") { if($_ =~ /REPLY \"([A-Z]+ [A-Za-z0-9+-\/=\*. ]+)\" (.*)/) { $fulltextreply{$1}=eval "qq{$2}"; logmsg "FTPD: set custom reply for $1\n"; } elsif($_ =~ /REPLY(LF|) ([A-Za-z0-9+\/=\*]*) (.*)/) { $commandreply{$2}=eval "qq{$3}"; if($1 ne "LF") { $commandreply{$2}.="\r\n"; } else { $commandreply{$2}.="\n"; } if($2 eq "") { logmsg "FTPD: set custom reply for empty command\n"; } else { logmsg "FTPD: set custom reply for $2 command\n"; } } elsif($_ =~ /COUNT ([A-Z]+) (.*)/) { # we blank the custom reply for this command when having # been used this number of times $customcount{$1}=$2; logmsg "FTPD: blank custom reply for $1 command after $2 uses\n"; } elsif($_ =~ /DELAY ([A-Z]+) (\d*)/) { $delayreply{$1}=$2; logmsg "FTPD: delay reply for $1 with $2 seconds\n"; } elsif($_ =~ /SLOWDOWN/) { $ctrldelay=1; $datadelay=1; logmsg "FTPD: send response with 0.01 sec delay between each byte\n"; } elsif($_ =~ /RETRWEIRDO/) { logmsg "FTPD: instructed to use RETRWEIRDO\n"; $retrweirdo=1; } elsif($_ =~ /RETRNOSIZE/) { logmsg "FTPD: instructed to use RETRNOSIZE\n"; $retrnosize=1; } elsif($_ =~ /PASVBADIP/) { logmsg "FTPD: instructed to use PASVBADIP\n"; $pasvbadip=1; } elsif($_ =~ /NODATACONN425/) { # applies to both active and passive FTP modes logmsg "FTPD: instructed to use NODATACONN425\n"; $nodataconn425=1; $nodataconn=1; } elsif($_ =~ /NODATACONN421/) { # applies to both active and passive FTP modes logmsg "FTPD: instructed to use NODATACONN421\n"; $nodataconn421=1; $nodataconn=1; } elsif($_ =~ /NODATACONN150/) { # applies to both active and passive FTP modes logmsg "FTPD: instructed to use NODATACONN150\n"; $nodataconn150=1; $nodataconn=1; } elsif($_ =~ /NODATACONN/) { # applies to both active and passive FTP modes logmsg "FTPD: instructed to use NODATACONN\n"; $nodataconn=1; } elsif($_ =~ /CAPA (.*)/) { logmsg "FTPD: instructed to support CAPABILITY command\n"; @capabilities = split(/ (?!(?:[^" ]|[^"] [^"])+")/, $1); foreach (@capabilities) { $_ = $1 if /^"(.*)"$/; } } elsif($_ =~ /AUTH (.*)/) { logmsg "FTPD: instructed to support AUTHENTICATION command\n"; @auth_mechs = split(/ /, $1); } elsif($_ =~ /NOSAVE/) { # don't actually store the file we upload - to be used when # uploading insanely huge amounts $nosave = 1; logmsg "FTPD: NOSAVE prevents saving of uploaded data\n"; } } close(CUSTOM); } #---------------------------------------------------------------------- #---------------------------------------------------------------------- #--------------------------- END OF SUBS ---------------------------- #---------------------------------------------------------------------- #---------------------------------------------------------------------- #********************************************************************** # Parse command line options # # Options: # # --verbose # verbose # --srcdir # source directory # --id # server instance number # --proto # server protocol # --pidfile # server pid file # --logfile # server log file # --ipv4 # server IP version 4 # --ipv6 # server IP version 6 # --port # server listener port # --addr # server address for listener port binding # while(@ARGV) { if($ARGV[0] eq '--verbose') { $verbose = 1; } elsif($ARGV[0] eq '--srcdir') { if($ARGV[1]) { $srcdir = $ARGV[1]; shift @ARGV; } } elsif($ARGV[0] eq '--id') { if($ARGV[1] && ($ARGV[1] =~ /^(\d+)$/)) { $idnum = $1 if($1 > 0); shift @ARGV; } } elsif($ARGV[0] eq '--proto') { if($ARGV[1] && ($ARGV[1] =~ /^(ftp|imap|pop3|smtp)$/)) { $proto = $1; shift @ARGV; } else { die "unsupported protocol $ARGV[1]"; } } elsif($ARGV[0] eq '--pidfile') { if($ARGV[1]) { $pidfile = $ARGV[1]; shift @ARGV; } } elsif($ARGV[0] eq '--logfile') { if($ARGV[1]) { $logfile = $ARGV[1]; shift @ARGV; } } elsif($ARGV[0] eq '--ipv4') { $ipvnum = 4; $listenaddr = '127.0.0.1' if($listenaddr eq '::1'); } elsif($ARGV[0] eq '--ipv6') { $ipvnum = 6; $listenaddr = '::1' if($listenaddr eq '127.0.0.1'); } elsif($ARGV[0] eq '--port') { if($ARGV[1] && ($ARGV[1] =~ /^(\d+)$/)) { $port = $1 if($1 > 1024); shift @ARGV; } } elsif($ARGV[0] eq '--addr') { if($ARGV[1]) { my $tmpstr = $ARGV[1]; if($tmpstr =~ /^(\d\d?\d?)\.(\d\d?\d?)\.(\d\d?\d?)\.(\d\d?\d?)$/) { $listenaddr = "$1.$2.$3.$4" if($ipvnum == 4); } elsif($ipvnum == 6) { $listenaddr = $tmpstr; $listenaddr =~ s/^\[(.*)\]$/$1/; } shift @ARGV; } } else { print STDERR "\nWarning: ftpserver.pl unknown parameter: $ARGV[0]\n"; } shift @ARGV; } #*************************************************************************** # Initialize command line option dependent variables # if(!$srcdir) { $srcdir = $ENV{'srcdir'} || '.'; } if(!$pidfile) { $pidfile = "$path/". server_pidfilename($proto, $ipvnum, $idnum); } if(!$logfile) { $logfile = server_logfilename($logdir, $proto, $ipvnum, $idnum); } $mainsockf_pidfile = "$path/". mainsockf_pidfilename($proto, $ipvnum, $idnum); $mainsockf_logfile = mainsockf_logfilename($logdir, $proto, $ipvnum, $idnum); if($proto eq 'ftp') { $datasockf_pidfile = "$path/". datasockf_pidfilename($proto, $ipvnum, $idnum); $datasockf_logfile = datasockf_logfilename($logdir, $proto, $ipvnum, $idnum); } $srvrname = servername_str($proto, $ipvnum, $idnum); $idstr = "$idnum" if($idnum > 1); protocolsetup($proto); $SIG{INT} = \&exit_signal_handler; $SIG{TERM} = \&exit_signal_handler; startsf(); logmsg sprintf("%s server listens on port IPv${ipvnum}/${port}\n", uc($proto)); open(PID, ">$pidfile"); print PID $$."\n"; close(PID); logmsg("logged pid $$ in $pidfile\n"); while(1) { # kill previous data connection sockfilt when alive if($datasockf_runs eq 'yes') { killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data'); logmsg "DATA sockfilt for $datasockf_mode data channel killed now\n"; } datasockf_state('STOPPED'); # # We read 'sockfilt' commands. # my $input; logmsg "Awaiting input\n"; sysread_or_die(\*SFREAD, \$input, 5); if($input !~ /^CNCT/) { # we wait for a connected client logmsg "MAIN sockfilt said: $input"; next; } logmsg "====> Client connect\n"; set_advisor_read_lock($SERVERLOGS_LOCK); $serverlogslocked = 1; # flush data: $| = 1; &customize(); # read test control instructions my $welcome = $commandreply{"welcome"}; if(!$welcome) { $welcome = $displaytext{"welcome"}; } else { # clear it after use $commandreply{"welcome"}=""; if($welcome !~ /\r\n\z/) { $welcome .= "\r\n"; } } sendcontrol $welcome; #remove global variables from last connection if($ftplistparserstate) { undef $ftplistparserstate; } if($ftptargetdir) { $ftptargetdir = ""; } if($verbose) { print STDERR "OUT: $welcome"; } my $full = ""; while(1) { my $i; # Now we expect to read DATA\n[hex size]\n[prot], where the [prot] # part only is FTP lingo. # COMMAND sysread_or_die(\*SFREAD, \$i, 5); if($i !~ /^DATA/) { logmsg "MAIN sockfilt said $i"; if($i =~ /^DISC/) { # disconnect last; } next; } # SIZE of data sysread_or_die(\*SFREAD, \$i, 5); my $size = 0; if($i =~ /^([0-9a-fA-F]{4})\n/) { $size = hex($1); } # data read_mainsockf(\$input, $size); ftpmsg $input; $full .= $input; # Loop until command completion next unless($full =~ /\r\n$/); # Remove trailing CRLF. $full =~ s/[\n\r]+$//; my $FTPCMD; my $FTPARG; if($proto eq "imap") { # IMAP is different with its identifier first on the command line if(($full =~ /^([^ ]+) ([^ ]+) (.*)/) || ($full =~ /^([^ ]+) ([^ ]+)/)) { $cmdid=$1; # set the global variable $FTPCMD=$2; $FTPARG=$3; } # IMAP authentication cancellation elsif($full =~ /^\*$/) { # Command id has already been set $FTPCMD="*"; $FTPARG=""; } # IMAP long "commands" are base64 authentication data elsif($full =~ /^[A-Z0-9+\/]*={0,2}$/i) { # Command id has already been set $FTPCMD=$full; $FTPARG=""; } else { sendcontrol "$full BAD Command\r\n"; last; } } elsif($full =~ /^([A-Z]{3,4})(\s(.*))?$/i) { $FTPCMD=$1; $FTPARG=$3; } elsif($proto eq "pop3") { # POP3 authentication cancellation if($full =~ /^\*$/) { $FTPCMD="*"; $FTPARG=""; } # POP3 long "commands" are base64 authentication data elsif($full =~ /^[A-Z0-9+\/]*={0,2}$/i) { $FTPCMD=$full; $FTPARG=""; } else { sendcontrol "-ERR Unrecognized command\r\n"; last; } } elsif($proto eq "smtp") { # SMTP authentication cancellation if($full =~ /^\*$/) { $FTPCMD="*"; $FTPARG=""; } # SMTP long "commands" are base64 authentication data elsif($full =~ /^[A-Z0-9+\/]{0,512}={0,2}$/i) { $FTPCMD=$full; $FTPARG=""; } else { sendcontrol "500 Unrecognized command\r\n"; last; } } else { sendcontrol "500 Unrecognized command\r\n"; last; } logmsg "< \"$full\"\n"; if($verbose) { print STDERR "IN: $full\n"; } $full = ""; my $delay = $delayreply{$FTPCMD}; if($delay) { # just go sleep this many seconds! logmsg("Sleep for $delay seconds\n"); my $twentieths = $delay * 20; while($twentieths--) { portable_sleep(0.05) unless($got_exit_signal); } } my $check = 1; # no response yet # See if there is a custom reply for the full text my $fulltext = $FTPARG ? $FTPCMD . " " . $FTPARG : $FTPCMD; my $text = $fulltextreply{$fulltext}; if($text && ($text ne "")) { sendcontrol "$text\r\n"; $check = 0; } else { # See if there is a custom reply for the command $text = $commandreply{$FTPCMD}; if($text && ($text ne "")) { if($customcount{$FTPCMD} && (!--$customcount{$FTPCMD})) { # used enough times so blank the custom command reply $commandreply{$FTPCMD}=""; } sendcontrol $text; $check = 0; } else { # See if there is any display text for the command $text = $displaytext{$FTPCMD}; if($text && ($text ne "")) { if($proto eq 'imap') { sendcontrol "$cmdid $text\r\n"; } else { sendcontrol "$text\r\n"; } $check = 0; } # only perform this if we're not faking a reply my $func = $commandfunc{uc($FTPCMD)}; if($func) { &$func($FTPARG, $FTPCMD); $check = 0; } } } if($check) { logmsg "$FTPCMD wasn't handled!\n"; if($proto eq 'pop3') { sendcontrol "-ERR $FTPCMD is not dealt with!\r\n"; } elsif($proto eq 'imap') { sendcontrol "$cmdid BAD $FTPCMD is not dealt with!\r\n"; } else { sendcontrol "500 $FTPCMD is not dealt with!\r\n"; } } } # while(1) logmsg "====> Client disconnected\n"; if($serverlogslocked) { $serverlogslocked = 0; clear_advisor_read_lock($SERVERLOGS_LOCK); } } killsockfilters($proto, $ipvnum, $idnum, $verbose); unlink($pidfile); if($serverlogslocked) { $serverlogslocked = 0; clear_advisor_read_lock($SERVERLOGS_LOCK); } exit;