#!/usr/bin/env perl #*************************************************************************** # _ _ ____ _ # Project ___| | | | _ \| | # / __| | | | |_) | | # | (__| |_| | _ <| |___ # \___|\___/|_| \_\_____| # # Copyright (C) 1998 - 2009, 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 http://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. # # $Id$ ########################################################################### # 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 mulitple 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. # use strict; use warnings; use IPC::Open2; require "getpart.pm"; require "ftp.pm"; BEGIN { # sub second timestamping needs Time::HiRes eval { no warnings "all"; require Time::HiRes; import Time::HiRes qw( gettimeofday ); } } #********************************************************************** # global vars... # my $verbose = 0; # set to 1 for debugging my $ftpdnum=""; my $logfilename = 'log/logfile.log'; # Override this for each test server my $pasvbadip=0; my $retrweirdo=0; my $retrnosize=0; my $srcdir="."; my $nosave=0; my $controldelay=0; # set to 1 to delay the control connect data sending to # test that curl deals with that nicely my $slavepid; # for the DATA connection sockfilt slave process my $ipv6=""; my $ext=""; # append to log/pid file names my $grok_eprt; my $port = 8921; # just a default my $listenaddr = "127.0.0.1"; # just a default my $pidfile = ".ftpd.pid"; # a default, use --pidfile my $SERVERLOGS_LOCK="log/serverlogs.lock"; # server logs advisor read lock my $serverlogslocked=0; my $proto="ftp"; my $sfpid; local(*SFREAD, *SFWRITE); #********************************************************************** # 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 #********************************************************************** # 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 $signame = shift; # For now, simply mimic old behavior. ftpkillslaves($verbose); unlink($pidfile); if($serverlogslocked) { $serverlogslocked = 0; clear_advisor_read_lock($SERVERLOGS_LOCK); } exit; } #********************************************************************** # getlogfilename returns a log file name depending on given arguments. # sub getlogfilename { my ($proto, $ipversion, $ssl, $instance, $sockfilter) = @_; my $filename; # For now, simply mimic old behavior. $filename = "log/ftpd$ftpdnum.log"; return $filename; } #********************************************************************** # 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, $sec); } if(open(LOGFILEFH, ">>$logfilename")) { print LOGFILEFH $now; print LOGFILEFH @_; close(LOGFILEFH); } } sub ftpmsg { # append to the server.input file open(INPUT, ">>log/server$ftpdnum.input") || logmsg "failed to open log/server$ftpdnum.input\n"; print INPUT @_; close(INPUT); # use this, open->print->close system only to make the file # open as little as possible, to make the test suite run # better on windows/cygwin } while(@ARGV) { if($ARGV[0] eq "-v") { $verbose=1; } elsif($ARGV[0] eq "-s") { $srcdir=$ARGV[1]; shift @ARGV; } elsif($ARGV[0] eq "--id") { $ftpdnum=$ARGV[1]; shift @ARGV; } elsif($ARGV[0] eq "--proto") { # ftp pop3 imap smtp $proto=$ARGV[1]; shift @ARGV; } elsif($ARGV[0] eq "--pidfile") { $pidfile=$ARGV[1]; shift @ARGV; } elsif($ARGV[0] eq "--ipv6") { $ipv6="--ipv6"; $ext="ipv6"; $grok_eprt = 1; } elsif($ARGV[0] eq "--port") { $port = $ARGV[1]; shift @ARGV; } elsif($ARGV[0] eq "--addr") { $listenaddr = $ARGV[1]; $listenaddr =~ s/^\[(.*)\]$/$1/; shift @ARGV; } shift @ARGV; }; # a dedicated protocol has been selected, check that it's a fine one if($proto !~ /^(ftp|imap|pop3|smtp)\z/) { die "unsupported protocol selected"; } $SIG{INT} = \&exit_signal_handler; $SIG{TERM} = \&exit_signal_handler; 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, $lcaller) = (caller)[1,2]; logmsg "Failed to read input\n"; logmsg "Error: ftp$ftpdnum$ext sysread error: $!\n"; kill(9, $sfpid); waitpid($sfpid, 0); logmsg "Exited from sysread_or_die() at $fcaller " . "line $lcaller. ftp$ftpdnum$ext sysread error: $!\n"; unlink($pidfile); if($serverlogslocked) { $serverlogslocked = 0; clear_advisor_read_lock($SERVERLOGS_LOCK); } exit; } elsif($result == 0) { ($fcaller, $lcaller) = (caller)[1,2]; logmsg "Failed to read input\n"; logmsg "Error: ftp$ftpdnum$ext read zero\n"; kill(9, $sfpid); waitpid($sfpid, 0); logmsg "Exited from sysread_or_die() at $fcaller " . "line $lcaller. ftp$ftpdnum$ext read zero\n"; unlink($pidfile); if($serverlogslocked) { $serverlogslocked = 0; clear_advisor_read_lock($SERVERLOGS_LOCK); } exit; } return $result; } sub startsf { my $cmd="./server/sockfilt --port $port --logfile log/sockctrl$ftpdnum$ext.log --pidfile .sockfilt$ftpdnum$ext.pid $ipv6"; $sfpid = open2(*SFREAD, *SFWRITE, $cmd); print STDERR "$cmd\n" if($verbose); print SFWRITE "PING\n"; my $pong; sysread SFREAD, $pong, 5; if($pong !~ /^PONG/) { logmsg "Failed sockfilt command: $cmd\n"; kill(9, $sfpid); waitpid($sfpid, 0); unlink($pidfile); if($serverlogslocked) { $serverlogslocked = 0; clear_advisor_read_lock($SERVERLOGS_LOCK); } die "Failed to start sockfilt!"; } } $logfilename = getlogfilename(); startsf(); logmsg sprintf("%s server listens on port IPv%d/$port\n", uc($proto), $ipv6?6:4); open(PID, ">$pidfile"); print PID $$."\n"; close(PID); logmsg("logged pid $$ in $pidfile\n"); 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 $l; } } # Send data to the client on the control stream, which happens to be plain # stdout. sub sendcontrol { if(!$controldelay) { # spit it all out at once sockfilt @_; } else { my $a = join("", @_); my @a = split("", $a); for(@a) { sockfilt $_; select(undef, undef, undef, 0.01); } } my $log; foreach $log (@_) { my $l = $log; $l =~ s/[\r\n]//g; logmsg "> \"$l\"\n"; } } # Send data to the client on the data stream sub senddata { my $l; foreach $l (@_) { if(!$controldelay) { # spit it all out at once sockfiltsecondary $l; } else { # pause between each byte for (split(//,$l)) { sockfiltsecondary $_; select(undef, undef, undef, 0.01); } } } } my %displaytext; my %commandfunc; # callback functions for certain commands # and text shown before the function specified below is run if($proto eq "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 'PWD' => '257 "/nowhere/anywhere" is current directory', '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', ); %commandfunc = ( 'PORT' => \&PORT_ftp, 'EPRT' => \&PORT_ftp, 'LIST' => \&LIST_ftp, 'NLST' => \&NLST_ftp, 'PASV' => \&PASV_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, ); } elsif($proto eq "pop3") { %commandfunc = ('RETR' => \&RETR_pop3, ); %displaytext = ('USER' => '+OK We are happy you popped in!', 'PASS' => '+OK Access granted', 'QUIT' => '+OK byebye', ); } elsif($proto eq "imap") { %commandfunc = ('FETCH' => \&FETCH_imap, 'SELECT' => \&SELECT_imap, ); %displaytext = ('LOGIN' => ' OK We are happy you popped in!', 'SELECT' => ' OK selection done', 'LOGOUT' => ' OK thanks for the fish', ); } elsif($proto eq "smtp") { %commandfunc = ('DATA' => \&DATA_smtp, 'RCPT' => \&RCPT_smtp, ); %displaytext = ('EHLO' => '230 We are happy you popped in!', 'MAIL' => '200 Note taken', 'RCPT' => '200 Receivers accepted', 'QUIT' => '200 byebye', ); } sub close_dataconn { my ($closed)=@_; # non-zero if already disconnected if(!$closed) { logmsg "* disconnect data connection\n"; print DWRITE "DISC\n"; my $i; sysread DREAD, $i, 5; } else { logmsg "data connection already disconnected\n"; } logmsg "=====> Closed data connection\n"; logmsg "* quit sockfilt for data (pid $slavepid)\n"; print DWRITE "QUIT\n"; waitpid $slavepid, 0; $slavepid=0; } ################ ################ SMTP commands ################ # what set by "RCPT" my $smtp_rcpt; sub DATA_smtp { my $testno; if($smtp_rcpt =~ /^TO:(.*)/) { $testno = $1; } else { return; # failure } if($testno eq "verifiedserver") { sendcontrol "554 WE ROOLZ: $$\r\n"; } else { sendcontrol "354 Show me the mail\r\n"; } logmsg "===> rcpt $testno was $smtp_rcpt\n"; } sub RCPT_smtp { my ($args) = @_; $smtp_rcpt = $args; } ################ ################ IMAP commands ################ # global to allow the command functions to read it my $cmdid; # what was picked by SELECT my $selected; sub SELECT_imap { my ($testno) = @_; my @data; my $size; logmsg "SELECT_imap got test $testno\n"; $selected = $testno; return 0; } sub FETCH_imap { my ($testno) = @_; my @data; my $size; logmsg "FETCH_imap got test $testno\n"; $testno = $selected; if($testno =~ /^verifiedserver$/) { # this is the secret command that verifies that this actually is # the curl test server my $response = "WE ROOLZ: $$\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 { logmsg "retrieve a mail\n"; $testno =~ s/^([^0-9]*)//; my $testpart = ""; if ($testno > 10000) { $testpart = $testno % 10000; $testno = int($testno / 10000); } # send mail content loadtest("$srcdir/data/test$testno"); @data = getpart("reply", "data$testpart"); } for (@data) { $size += length($_); } sendcontrol "* FETCH starts {$size}\r\n"; for my $d (@data) { sendcontrol $d; } sendcontrol "$cmdid OK FETCH completed\r\n"; return 0; } ################ ################ POP3 commands ################ sub RETR_pop3 { my ($testno) = @_; my @data; if($testno =~ /^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 { logmsg "retrieve a mail\n"; $testno =~ s/^([^0-9]*)//; my $testpart = ""; if ($testno > 10000) { $testpart = $testno % 10000; $testno = int($testno / 10000); } # send mail content loadtest("$srcdir/data/test$testno"); @data = getpart("reply", "data$testpart"); } sendcontrol "+OK Mail transfer starts\r\n"; for my $d (@data) { sendcontrol $d; } # end with the magic 5-byte end of mail marker sendcontrol "\r\n.\r\n"; return 0; } ################ ################ FTP commands ################ my $rest=0; sub REST_ftp { $rest = $_[0]; logmsg "Set REST position to $rest\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"); logmsg "pass LIST data on data connection\n"; 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"); 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($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($testno =~ /^verifiedserver$/) { # 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"; 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); } sysread DREAD, $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 $pidf=".sockdata$ftpdnum$ext.pid"; my $prev = processexists($pidf); if($prev > 0) { print "kill existing server: $prev\n" if($verbose); kill(9, $prev); waitpid($prev, 0); } # We fire up a new sockfilt to do the data transfer for us. $slavepid = open2(\*DREAD, \*DWRITE, "./server/sockfilt --port 0 --logfile log/sockdata$ftpdnum$ext.log --pidfile $pidf $ipv6"); print DWRITE "PING\n"; my $pong; sysread_or_die(\*DREAD, \$pong, 5); if($pong !~ /^PONG/) { kill(9, $slavepid); waitpid($slavepid, 0); sendcontrol "500 no free ports!\r\n"; logmsg "failed to run sockfilt for data connection\n"; return 0; } logmsg "Run sockfilt for data on pid $slavepid\n"; # Find out what port we listen on 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 sysread_or_die(\*DREAD, \$i, $size); # The data is in the format # IPvX/NNN if($i =~ /IPv(\d)\/(\d+)/) { # FIX: deal with IP protocol version $pasvport = $2; } if($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", ($pasvport/256), ($pasvport%256)); } else { # EPSV reply sendcontrol sprintf("229 Entering Passive Mode (|||%d|)\n", $pasvport); } eval { local $SIG{ALRM} = sub { die "alarm\n" }; # assume swift operations unless explicitly slow alarm ($controldelay?20:10); # Wait for 'CNCT' my $input; while(sysread(DREAD, $input, 5)) { if($input !~ /^CNCT/) { # we wait for a connected client logmsg "Odd, we got $input from client\n"; next; } logmsg "====> Client DATA connect\n"; last; } alarm 0; }; if ($@) { # timed out print DWRITE "QUIT\n"; waitpid $slavepid, 0; logmsg "accept failed\n"; $slavepid=0; return; } else { logmsg "data connection setup on port $pasvport\n"; } return; } # Support both PORT and EPRT here. Consider LPRT too. sub PORT_ftp { my ($arg, $cmd) = @_; my $port; my $addr; # We always ignore the given IP and use localhost. if($cmd eq "PORT") { if($arg !~ /(\d+),(\d+),(\d+),(\d+),(\d+),(\d+)/) { logmsg "bad PORT-line: $arg\n"; sendcontrol "500 silly you, go away\r\n"; return 0; } $port = ($5<<8)+$6; $addr = "$1.$2.$3.$4"; } # EPRT |2|::1|49706| elsif(($cmd eq "EPRT") && ($grok_eprt)) { if($arg !~ /(\d+)\|([^\|]+)\|(\d+)/) { sendcontrol "500 silly you, go away\r\n"; return 0; } sendcontrol "200 Thanks for dropping by. We contact you later\r\n"; $port = $3; $addr = $2; } else { sendcontrol "500 we don't like $cmd now\r\n"; return 0; } if(!$port || $port > 65535) { print STDERR "very illegal PORT number: $port\n"; return 1; } # We fire up a new sockfilt to do the data transfer for us. # FIX: make it use IPv6 if need be my $filtcmd="./server/sockfilt --connect $port --addr $addr --logfile log/sockdata$ftpdnum$ext.log --pidfile .sockdata$ftpdnum$ext.pid $ipv6"; $slavepid = open2(\*DREAD, \*DWRITE, $filtcmd); print STDERR "$filtcmd\n" if($verbose); print DWRITE "PING\n"; my $pong; sysread DREAD, $pong, 5; if($pong !~ /^PONG/) { logmsg "Failed sockfilt for data connection\n"; kill(9, $slavepid); waitpid($slavepid, 0); } logmsg "====> Client DATA connect to port $port\n"; return; } my %customreply; my %customcount; my %delayreply; sub customize { $nosave = 0; # default is to save as normal $controldelay = 0; # default is no delaying the responses $retrweirdo = 0; $retrnosize = 0; $pasvbadip = 0; $nosave = 0; %customreply = (); %customcount = (); %delayreply = (); open(CUSTOM, ") { if($_ =~ /REPLY ([A-Z]+) (.*)/) { $customreply{$1}=eval "qq{$2}"; logmsg "FTPD: set custom reply for $1\n"; } if($_ =~ /COUNT ([A-Z]+) (.*)/) { # we blank the customreply for this command when having # been used this number of times $customcount{$1}=$2; logmsg "FTPD: blank custom reply for $1 after $2 uses\n"; } elsif($_ =~ /DELAY ([A-Z]+) (\d*)/) { $delayreply{$1}=$2; logmsg "FTPD: delay reply for $1 with $2 seconds\n"; } elsif($_ =~ /SLOWDOWN/) { $controldelay=1; logmsg "FTPD: send response with 0.1 sec delay between each byte\n"; } elsif($_ =~ /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"; $pasvbadip=1; } elsif($_ =~ /NOSAVE/) { # don't actually store the file we upload - to be used when # uploading insanely huge amounts $nosave = 1; logmsg "FTPD: NOSAVE prevents saving of uploaded data\n"; } } close(CUSTOM); } my @welcome; if(($proto eq "ftp") || ($proto eq "smtp")) { @welcome=( '220- _ _ ____ _ '."\r\n", '220- ___| | | | _ \| | '."\r\n", '220- / __| | | | |_) | | '."\r\n", '220- | (__| |_| | _ <| |___ '."\r\n", '220 \___|\___/|_| \_\_____|'."\r\n"); } elsif($proto eq "pop3") { @welcome=( ' _ _ ____ _ '."\r\n", ' ___| | | | _ \| | '."\r\n", ' / __| | | | |_) | | '."\r\n", ' | (__| |_| | _ <| |___ '."\r\n", ' \___|\___/|_| \_\_____|'."\r\n", '+OK cURL POP3 server ready to serve'."\r\n"); } elsif($proto eq "imap") { @welcome=( ' _ _ ____ _ '."\r\n", ' ___| | | | _ \| | '."\r\n", ' / __| | | | |_) | | '."\r\n", ' | (__| |_| | _ <| |___ '."\r\n", ' \___|\___/|_| \_\_____|'."\r\n", '* OK cURL IMAP server ready to serve'."\r\n"); } while(1) { # # 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 "sockfilt said: $input"; next; } logmsg "====> Client connect\n"; set_advisor_read_lock($SERVERLOGS_LOCK); $serverlogslocked = 1; # flush data: $| = 1; kill(9, $slavepid) if($slavepid); waitpid($slavepid, 0) if($slavepid); $slavepid=0; &customize(); # read test control instructions sendcontrol @welcome; if($verbose) { for(@welcome) { print STDERR "OUT: $_"; } } 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 "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 sysread SFREAD, $_, $size; ftpmsg $_; # Remove trailing CRLF. s/[\n\r]+$//; my $FTPCMD; my $FTPARG; my $full=$_; if($proto eq "imap") { # IMAP is different with its identifier first on the command line unless (m/^([^ ]+) ([^ ]+) (.*)/ || m/^([^ ]+) ([^ ]+)/) { sendcontrol "$1 '$_': command not understood.\r\n"; last; } $cmdid=$1; # set the global variable $FTPCMD=$2; $FTPARG=$3; } else { unless (m/^([A-Z]{3,4})\s?(.*)/i) { sendcontrol "500 '$_': command not understood.\r\n"; last; } $FTPCMD=$1; $FTPARG=$2; } logmsg "< \"$full\"\n"; if($verbose) { print STDERR "IN: $full\n"; } my $delay = $delayreply{$FTPCMD}; if($delay) { # just go sleep this many seconds! logmsg("Sleep for $delay seconds\n"); my $twentieths = $delay * 20; while($twentieths--) { select(undef, undef, undef, 0.05) unless($got_exit_signal); } } my $text; $text = $customreply{$FTPCMD}; my $fake = $text; if($text && ($text ne "")) { if($customcount{$FTPCMD} && (!--$customcount{$FTPCMD})) { # used enough number of times, now blank the customreply $customreply{$FTPCMD}=""; } } else { $text = $displaytext{$FTPCMD}; } my $check; if($text && ($text ne "")) { if($cmdid && ($cmdid ne "")) { sendcontrol "$cmdid$text\r\n"; } else { sendcontrol "$text\r\n"; } } else { $check=1; # no response yet } unless($fake && ($fake ne "")) { # only perform this if we're not faking a reply my $func = $commandfunc{$FTPCMD}; if($func) { &$func($FTPARG, $FTPCMD); $check=0; # taken care of } } if($check) { logmsg "$FTPCMD wasn't handled!\n"; 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); } } print SFWRITE "QUIT\n"; waitpid $sfpid, 0; unlink($pidfile); if($serverlogslocked) { $serverlogslocked = 0; clear_advisor_read_lock($SERVERLOGS_LOCK); } exit;