1#!/usr/bin/env perl 2#*************************************************************************** 3# _ _ ____ _ 4# Project ___| | | | _ \| | 5# / __| | | | |_) | | 6# | (__| |_| | _ <| |___ 7# \___|\___/|_| \_\_____| 8# 9# Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al. 10# 11# This software is licensed as described in the file COPYING, which 12# you should have received as part of this distribution. The terms 13# are also available at https://curl.haxx.se/docs/copyright.html. 14# 15# You may opt to use, copy, modify, merge, publish, distribute and/or sell 16# copies of the Software, and permit persons to whom the Software is 17# furnished to do so, under the terms of the COPYING file. 18# 19# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 20# KIND, either express or implied. 21# 22########################################################################### 23 24# This is a server designed for the curl test suite. 25# 26# In December 2009 we started remaking the server to support more protocols 27# that are similar in spirit. Like POP3, IMAP and SMTP in addition to the FTP 28# it already supported since a long time. Note that it still only supports one 29# protocol per invoke. You need to start multiple servers to support multiple 30# protocols simultaneously. 31# 32# It is meant to exercise curl, it is not meant to be a fully working 33# or even very standard compliant server. 34# 35# You may optionally specify port on the command line, otherwise it'll 36# default to port 8921. 37# 38# All socket/network/TCP related stuff is done by the 'sockfilt' program. 39# 40 41BEGIN { 42 push(@INC, $ENV{'srcdir'}) if(defined $ENV{'srcdir'}); 43 push(@INC, "."); 44 # sub second timestamping needs Time::HiRes 45 eval { 46 no warnings "all"; 47 require Time::HiRes; 48 import Time::HiRes qw( gettimeofday ); 49 } 50} 51 52use strict; 53use warnings; 54use IPC::Open2; 55use Digest::MD5; 56 57require "getpart.pm"; 58require "ftp.pm"; 59require "directories.pm"; 60 61use serverhelp qw( 62 servername_str 63 server_pidfilename 64 server_logfilename 65 mainsockf_pidfilename 66 mainsockf_logfilename 67 datasockf_pidfilename 68 datasockf_logfilename 69 ); 70 71#********************************************************************** 72# global vars... 73# 74my $verbose = 0; # set to 1 for debugging 75my $idstr = ""; # server instance string 76my $idnum = 1; # server instance number 77my $ipvnum = 4; # server IPv number (4 or 6) 78my $proto = 'ftp'; # default server protocol 79my $srcdir; # directory where ftpserver.pl is located 80my $srvrname; # server name for presentation purposes 81my $cwd_testno; # test case numbers extracted from CWD command 82my $path = '.'; 83my $logdir = $path .'/log'; 84 85#********************************************************************** 86# global vars used for server address and primary listener port 87# 88my $port = 8921; # default primary listener port 89my $listenaddr = '127.0.0.1'; # default address for listener port 90 91#********************************************************************** 92# global vars used for file names 93# 94my $pidfile; # server pid file name 95my $logfile; # server log file name 96my $mainsockf_pidfile; # pid file for primary connection sockfilt process 97my $mainsockf_logfile; # log file for primary connection sockfilt process 98my $datasockf_pidfile; # pid file for secondary connection sockfilt process 99my $datasockf_logfile; # log file for secondary connection sockfilt process 100 101#********************************************************************** 102# global vars used for server logs advisor read lock handling 103# 104my $SERVERLOGS_LOCK = 'log/serverlogs.lock'; 105my $serverlogslocked = 0; 106 107#********************************************************************** 108# global vars used for child processes PID tracking 109# 110my $sfpid; # PID for primary connection sockfilt process 111my $slavepid; # PID for secondary connection sockfilt process 112 113#********************************************************************** 114# global typeglob filehandle vars to read/write from/to sockfilters 115# 116local *SFREAD; # used to read from primary connection 117local *SFWRITE; # used to write to primary connection 118local *DREAD; # used to read from secondary connection 119local *DWRITE; # used to write to secondary connection 120 121my $sockfilt_timeout = 5; # default timeout for sockfilter eXsysreads 122 123#********************************************************************** 124# global vars which depend on server protocol selection 125# 126my %commandfunc; # protocol command specific function callbacks 127my %displaytext; # text returned to client before callback runs 128 129#********************************************************************** 130# global vars customized for each test from the server commands file 131# 132my $ctrldelay; # set if server should throttle ctrl stream 133my $datadelay; # set if server should throttle data stream 134my $retrweirdo; # set if ftp server should use RETRWEIRDO 135my $retrnosize; # set if ftp server should use RETRNOSIZE 136my $pasvbadip; # set if ftp server should use PASVBADIP 137my $nosave; # set if ftp server should not save uploaded data 138my $nodataconn; # set if ftp srvr doesn't establish or accepts data channel 139my $nodataconn425; # set if ftp srvr doesn't establish data ch and replies 425 140my $nodataconn421; # set if ftp srvr doesn't establish data ch and replies 421 141my $nodataconn150; # set if ftp srvr doesn't establish data ch and replies 150 142my @capabilities; # set if server supports capability commands 143my @auth_mechs; # set if server supports authentication commands 144my %fulltextreply; # 145my %commandreply; # 146my %customcount; # 147my %delayreply; # 148 149#********************************************************************** 150# global variables for to test ftp wildcardmatching or other test that 151# need flexible LIST responses.. and corresponding files. 152# $ftptargetdir is keeping the fake "name" of LIST directory. 153# 154my $ftplistparserstate; 155my $ftptargetdir=""; 156 157#********************************************************************** 158# global variables used when running a ftp server to keep state info 159# relative to the secondary or data sockfilt process. Values of these 160# variables should only be modified using datasockf_state() sub, given 161# that they are closely related and relationship is a bit awkward. 162# 163my $datasockf_state = 'STOPPED'; # see datasockf_state() sub 164my $datasockf_mode = 'none'; # ['none','active','passive'] 165my $datasockf_runs = 'no'; # ['no','yes'] 166my $datasockf_conn = 'no'; # ['no','yes'] 167 168#********************************************************************** 169# global vars used for signal handling 170# 171my $got_exit_signal = 0; # set if program should finish execution ASAP 172my $exit_signal; # first signal handled in exit_signal_handler 173 174#********************************************************************** 175# Mail related definitions 176# 177my $TEXT_PASSWORD = "secret"; 178my $POP3_TIMESTAMP = "<1972.987654321\@curl>"; 179 180#********************************************************************** 181# exit_signal_handler will be triggered to indicate that the program 182# should finish its execution in a controlled way as soon as possible. 183# For now, program will also terminate from within this handler. 184# 185sub exit_signal_handler { 186 my $signame = shift; 187 # For now, simply mimic old behavior. 188 killsockfilters($proto, $ipvnum, $idnum, $verbose); 189 unlink($pidfile); 190 if($serverlogslocked) { 191 $serverlogslocked = 0; 192 clear_advisor_read_lock($SERVERLOGS_LOCK); 193 } 194 exit; 195} 196 197#********************************************************************** 198# logmsg is general message logging subroutine for our test servers. 199# 200sub logmsg { 201 my $now; 202 # sub second timestamping needs Time::HiRes 203 if($Time::HiRes::VERSION) { 204 my ($seconds, $usec) = gettimeofday(); 205 my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = 206 localtime($seconds); 207 $now = sprintf("%02d:%02d:%02d.%06d ", $hour, $min, $sec, $usec); 208 } 209 else { 210 my $seconds = time(); 211 my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = 212 localtime($seconds); 213 $now = sprintf("%02d:%02d:%02d ", $hour, $min, $sec); 214 } 215 if(open(LOGFILEFH, ">>$logfile")) { 216 print LOGFILEFH $now; 217 print LOGFILEFH @_; 218 close(LOGFILEFH); 219 } 220} 221 222sub ftpmsg { 223 # append to the server.input file 224 open(INPUT, ">>log/server$idstr.input") || 225 logmsg "failed to open log/server$idstr.input\n"; 226 227 print INPUT @_; 228 close(INPUT); 229 230 # use this, open->print->close system only to make the file 231 # open as little as possible, to make the test suite run 232 # better on windows/cygwin 233} 234 235#********************************************************************** 236# eXsysread is a wrapper around perl's sysread() function. This will 237# repeat the call to sysread() until it has actually read the complete 238# number of requested bytes or an unrecoverable condition occurs. 239# On success returns a positive value, the number of bytes requested. 240# On failure or timeout returns zero. 241# 242sub eXsysread { 243 my $FH = shift; 244 my $scalar = shift; 245 my $nbytes = shift; 246 my $timeout = shift; # A zero timeout disables eXsysread() time limit 247 # 248 my $time_limited = 0; 249 my $timeout_rest = 0; 250 my $start_time = 0; 251 my $nread = 0; 252 my $rc; 253 254 $$scalar = ""; 255 256 if((not defined $nbytes) || ($nbytes < 1)) { 257 logmsg "Error: eXsysread() failure: " . 258 "length argument must be positive\n"; 259 return 0; 260 } 261 if((not defined $timeout) || ($timeout < 0)) { 262 logmsg "Error: eXsysread() failure: " . 263 "timeout argument must be zero or positive\n"; 264 return 0; 265 } 266 if($timeout > 0) { 267 # caller sets eXsysread() time limit 268 $time_limited = 1; 269 $timeout_rest = $timeout; 270 $start_time = int(time()); 271 } 272 273 while($nread < $nbytes) { 274 if($time_limited) { 275 eval { 276 local $SIG{ALRM} = sub { die "alarm\n"; }; 277 alarm $timeout_rest; 278 $rc = sysread($FH, $$scalar, $nbytes - $nread, $nread); 279 alarm 0; 280 }; 281 $timeout_rest = $timeout - (int(time()) - $start_time); 282 if($timeout_rest < 1) { 283 logmsg "Error: eXsysread() failure: timed out\n"; 284 return 0; 285 } 286 } 287 else { 288 $rc = sysread($FH, $$scalar, $nbytes - $nread, $nread); 289 } 290 if($got_exit_signal) { 291 logmsg "Error: eXsysread() failure: signalled to die\n"; 292 return 0; 293 } 294 if(not defined $rc) { 295 if($!{EINTR}) { 296 logmsg "Warning: retrying sysread() interrupted system call\n"; 297 next; 298 } 299 if($!{EAGAIN}) { 300 logmsg "Warning: retrying sysread() due to EAGAIN\n"; 301 next; 302 } 303 if($!{EWOULDBLOCK}) { 304 logmsg "Warning: retrying sysread() due to EWOULDBLOCK\n"; 305 next; 306 } 307 logmsg "Error: sysread() failure: $!\n"; 308 return 0; 309 } 310 if($rc < 0) { 311 logmsg "Error: sysread() failure: returned negative value $rc\n"; 312 return 0; 313 } 314 if($rc == 0) { 315 logmsg "Error: sysread() failure: read zero bytes\n"; 316 return 0; 317 } 318 $nread += $rc; 319 } 320 return $nread; 321} 322 323#********************************************************************** 324# read_mainsockf attempts to read the given amount of output from the 325# sockfilter which is in use for the main or primary connection. This 326# reads untranslated sockfilt lingo which may hold data read from the 327# main or primary socket. On success returns 1, otherwise zero. 328# 329sub read_mainsockf { 330 my $scalar = shift; 331 my $nbytes = shift; 332 my $timeout = shift; # Optional argument, if zero blocks indefinitively 333 my $FH = \*SFREAD; 334 335 if(not defined $timeout) { 336 $timeout = $sockfilt_timeout + ($nbytes >> 12); 337 } 338 if(eXsysread($FH, $scalar, $nbytes, $timeout) != $nbytes) { 339 my ($fcaller, $lcaller) = (caller)[1,2]; 340 logmsg "Error: read_mainsockf() failure at $fcaller " . 341 "line $lcaller. Due to eXsysread() failure\n"; 342 return 0; 343 } 344 return 1; 345} 346 347#********************************************************************** 348# read_datasockf attempts to read the given amount of output from the 349# sockfilter which is in use for the data or secondary connection. This 350# reads untranslated sockfilt lingo which may hold data read from the 351# data or secondary socket. On success returns 1, otherwise zero. 352# 353sub read_datasockf { 354 my $scalar = shift; 355 my $nbytes = shift; 356 my $timeout = shift; # Optional argument, if zero blocks indefinitively 357 my $FH = \*DREAD; 358 359 if(not defined $timeout) { 360 $timeout = $sockfilt_timeout + ($nbytes >> 12); 361 } 362 if(eXsysread($FH, $scalar, $nbytes, $timeout) != $nbytes) { 363 my ($fcaller, $lcaller) = (caller)[1,2]; 364 logmsg "Error: read_datasockf() failure at $fcaller " . 365 "line $lcaller. Due to eXsysread() failure\n"; 366 return 0; 367 } 368 return 1; 369} 370 371sub sysread_or_die { 372 my $FH = shift; 373 my $scalar = shift; 374 my $length = shift; 375 my $fcaller; 376 my $lcaller; 377 my $result; 378 379 $result = sysread($$FH, $$scalar, $length); 380 381 if(not defined $result) { 382 ($fcaller, $lcaller) = (caller)[1,2]; 383 logmsg "Failed to read input\n"; 384 logmsg "Error: $srvrname server, sysread error: $!\n"; 385 logmsg "Exited from sysread_or_die() at $fcaller " . 386 "line $lcaller. $srvrname server, sysread error: $!\n"; 387 killsockfilters($proto, $ipvnum, $idnum, $verbose); 388 unlink($pidfile); 389 if($serverlogslocked) { 390 $serverlogslocked = 0; 391 clear_advisor_read_lock($SERVERLOGS_LOCK); 392 } 393 exit; 394 } 395 elsif($result == 0) { 396 ($fcaller, $lcaller) = (caller)[1,2]; 397 logmsg "Failed to read input\n"; 398 logmsg "Error: $srvrname server, read zero\n"; 399 logmsg "Exited from sysread_or_die() at $fcaller " . 400 "line $lcaller. $srvrname server, read zero\n"; 401 killsockfilters($proto, $ipvnum, $idnum, $verbose); 402 unlink($pidfile); 403 if($serverlogslocked) { 404 $serverlogslocked = 0; 405 clear_advisor_read_lock($SERVERLOGS_LOCK); 406 } 407 exit; 408 } 409 410 return $result; 411} 412 413sub startsf { 414 my $mainsockfcmd = "./server/sockfilt " . 415 "--ipv$ipvnum --port $port " . 416 "--pidfile \"$mainsockf_pidfile\" " . 417 "--logfile \"$mainsockf_logfile\""; 418 $sfpid = open2(*SFREAD, *SFWRITE, $mainsockfcmd); 419 420 print STDERR "$mainsockfcmd\n" if($verbose); 421 422 print SFWRITE "PING\n"; 423 my $pong; 424 sysread_or_die(\*SFREAD, \$pong, 5); 425 426 if($pong !~ /^PONG/) { 427 logmsg "Failed sockfilt command: $mainsockfcmd\n"; 428 killsockfilters($proto, $ipvnum, $idnum, $verbose); 429 unlink($pidfile); 430 if($serverlogslocked) { 431 $serverlogslocked = 0; 432 clear_advisor_read_lock($SERVERLOGS_LOCK); 433 } 434 die "Failed to start sockfilt!"; 435 } 436} 437 438#********************************************************************** 439# Returns the given test's reply data 440# 441sub getreplydata { 442 my ($testno) = @_; 443 my $testpart = ""; 444 445 $testno =~ s/^([^0-9]*)//; 446 if($testno > 10000) { 447 $testpart = $testno % 10000; 448 $testno = int($testno / 10000); 449 } 450 451 loadtest("$srcdir/data/test$testno"); 452 453 my @data = getpart("reply", "data$testpart"); 454 if((!@data) && ($testpart ne "")) { 455 @data = getpart("reply", "data"); 456 } 457 458 return @data; 459} 460 461sub sockfilt { 462 my $l; 463 foreach $l (@_) { 464 printf SFWRITE "DATA\n%04x\n", length($l); 465 print SFWRITE $l; 466 } 467} 468 469sub sockfiltsecondary { 470 my $l; 471 foreach $l (@_) { 472 printf DWRITE "DATA\n%04x\n", length($l); 473 print DWRITE $l; 474 } 475} 476 477#********************************************************************** 478# Send data to the client on the control stream, which happens to be plain 479# stdout. 480# 481sub sendcontrol { 482 if(!$ctrldelay) { 483 # spit it all out at once 484 sockfilt @_; 485 } 486 else { 487 my $a = join("", @_); 488 my @a = split("", $a); 489 490 for(@a) { 491 sockfilt $_; 492 select(undef, undef, undef, 0.01); 493 } 494 } 495 my $log; 496 foreach $log (@_) { 497 my $l = $log; 498 $l =~ s/\r/[CR]/g; 499 $l =~ s/\n/[LF]/g; 500 logmsg "> \"$l\"\n"; 501 } 502} 503 504#********************************************************************** 505# Send data to the FTP client on the data stream when data connection 506# is actually established. Given that this sub should only be called 507# when a data connection is supposed to be established, calling this 508# without a data connection is an indication of weak logic somewhere. 509# 510sub senddata { 511 my $l; 512 if($datasockf_conn eq 'no') { 513 logmsg "WARNING: Detected data sending attempt without DATA channel\n"; 514 foreach $l (@_) { 515 logmsg "WARNING: Data swallowed: $l\n" 516 } 517 return; 518 } 519 520 foreach $l (@_) { 521 if(!$datadelay) { 522 # spit it all out at once 523 sockfiltsecondary $l; 524 } 525 else { 526 # pause between each byte 527 for (split(//,$l)) { 528 sockfiltsecondary $_; 529 select(undef, undef, undef, 0.01); 530 } 531 } 532 } 533} 534 535#********************************************************************** 536# protocolsetup initializes the 'displaytext' and 'commandfunc' hashes 537# for the given protocol. References to protocol command callbacks are 538# stored in 'commandfunc' hash, and text which will be returned to the 539# client before the command callback runs is stored in 'displaytext'. 540# 541sub protocolsetup { 542 my $proto = $_[0]; 543 544 if($proto eq 'ftp') { 545 %commandfunc = ( 546 'PORT' => \&PORT_ftp, 547 'EPRT' => \&PORT_ftp, 548 'LIST' => \&LIST_ftp, 549 'NLST' => \&NLST_ftp, 550 'PASV' => \&PASV_ftp, 551 'CWD' => \&CWD_ftp, 552 'PWD' => \&PWD_ftp, 553 'EPSV' => \&PASV_ftp, 554 'RETR' => \&RETR_ftp, 555 'SIZE' => \&SIZE_ftp, 556 'REST' => \&REST_ftp, 557 'STOR' => \&STOR_ftp, 558 'APPE' => \&STOR_ftp, # append looks like upload 559 'MDTM' => \&MDTM_ftp, 560 ); 561 %displaytext = ( 562 'USER' => '331 We are happy you popped in!', 563 'PASS' => '230 Welcome you silly person', 564 'PORT' => '200 You said PORT - I say FINE', 565 'TYPE' => '200 I modify TYPE as you wanted', 566 'LIST' => '150 here comes a directory', 567 'NLST' => '150 here comes a directory', 568 'CWD' => '250 CWD command successful.', 569 'SYST' => '215 UNIX Type: L8', # just fake something 570 'QUIT' => '221 bye bye baby', # just reply something 571 'MKD' => '257 Created your requested directory', 572 'REST' => '350 Yeah yeah we set it there for you', 573 'DELE' => '200 OK OK OK whatever you say', 574 'RNFR' => '350 Received your order. Please provide more', 575 'RNTO' => '250 Ok, thanks. File renaming completed.', 576 'NOOP' => '200 Yes, I\'m very good at doing nothing.', 577 'PBSZ' => '500 PBSZ not implemented', 578 'PROT' => '500 PROT not implemented', 579 'welcome' => join("", 580 '220- _ _ ____ _ '."\r\n", 581 '220- ___| | | | _ \| | '."\r\n", 582 '220- / __| | | | |_) | | '."\r\n", 583 '220- | (__| |_| | _ {| |___ '."\r\n", 584 '220 \___|\___/|_| \_\_____|'."\r\n") 585 ); 586 } 587 elsif($proto eq 'pop3') { 588 %commandfunc = ( 589 'APOP' => \&APOP_pop3, 590 'AUTH' => \&AUTH_pop3, 591 'CAPA' => \&CAPA_pop3, 592 'DELE' => \&DELE_pop3, 593 'LIST' => \&LIST_pop3, 594 'NOOP' => \&NOOP_pop3, 595 'PASS' => \&PASS_pop3, 596 'QUIT' => \&QUIT_pop3, 597 'RETR' => \&RETR_pop3, 598 'RSET' => \&RSET_pop3, 599 'STAT' => \&STAT_pop3, 600 'TOP' => \&TOP_pop3, 601 'UIDL' => \&UIDL_pop3, 602 'USER' => \&USER_pop3, 603 ); 604 %displaytext = ( 605 'welcome' => join("", 606 ' _ _ ____ _ '."\r\n", 607 ' ___| | | | _ \| | '."\r\n", 608 ' / __| | | | |_) | | '."\r\n", 609 ' | (__| |_| | _ {| |___ '."\r\n", 610 ' \___|\___/|_| \_\_____|'."\r\n", 611 '+OK curl POP3 server ready to serve '."\r\n") 612 ); 613 } 614 elsif($proto eq 'imap') { 615 %commandfunc = ( 616 'APPEND' => \&APPEND_imap, 617 'CAPABILITY' => \&CAPABILITY_imap, 618 'CHECK' => \&CHECK_imap, 619 'CLOSE' => \&CLOSE_imap, 620 'COPY' => \©_imap, 621 'CREATE' => \&CREATE_imap, 622 'DELETE' => \&DELETE_imap, 623 'EXAMINE' => \&EXAMINE_imap, 624 'EXPUNGE' => \&EXPUNGE_imap, 625 'FETCH' => \&FETCH_imap, 626 'LIST' => \&LIST_imap, 627 'LSUB' => \&LSUB_imap, 628 'LOGIN' => \&LOGIN_imap, 629 'LOGOUT' => \&LOGOUT_imap, 630 'NOOP' => \&NOOP_imap, 631 'RENAME' => \&RENAME_imap, 632 'SEARCH' => \&SEARCH_imap, 633 'SELECT' => \&SELECT_imap, 634 'STATUS' => \&STATUS_imap, 635 'STORE' => \&STORE_imap, 636 'UID' => \&UID_imap, 637 ); 638 %displaytext = ( 639 'welcome' => join("", 640 ' _ _ ____ _ '."\r\n", 641 ' ___| | | | _ \| | '."\r\n", 642 ' / __| | | | |_) | | '."\r\n", 643 ' | (__| |_| | _ {| |___ '."\r\n", 644 ' \___|\___/|_| \_\_____|'."\r\n", 645 '* OK curl IMAP server ready to serve'."\r\n") 646 ); 647 } 648 elsif($proto eq 'smtp') { 649 %commandfunc = ( 650 'DATA' => \&DATA_smtp, 651 'EHLO' => \&EHLO_smtp, 652 'EXPN' => \&EXPN_smtp, 653 'HELO' => \&HELO_smtp, 654 'HELP' => \&HELP_smtp, 655 'MAIL' => \&MAIL_smtp, 656 'NOOP' => \&NOOP_smtp, 657 'RSET' => \&RSET_smtp, 658 'RCPT' => \&RCPT_smtp, 659 'VRFY' => \&VRFY_smtp, 660 'QUIT' => \&QUIT_smtp, 661 ); 662 %displaytext = ( 663 'welcome' => join("", 664 '220- _ _ ____ _ '."\r\n", 665 '220- ___| | | | _ \| | '."\r\n", 666 '220- / __| | | | |_) | | '."\r\n", 667 '220- | (__| |_| | _ {| |___ '."\r\n", 668 '220 \___|\___/|_| \_\_____|'."\r\n") 669 ); 670 } 671} 672 673sub close_dataconn { 674 my ($closed)=@_; # non-zero if already disconnected 675 676 my $datapid = processexists($datasockf_pidfile); 677 678 logmsg "=====> Closing $datasockf_mode DATA connection...\n"; 679 680 if(!$closed) { 681 if($datapid > 0) { 682 logmsg "Server disconnects $datasockf_mode DATA connection\n"; 683 print DWRITE "DISC\n"; 684 my $i; 685 sysread DREAD, $i, 5; 686 } 687 else { 688 logmsg "Server finds $datasockf_mode DATA connection already ". 689 "disconnected\n"; 690 } 691 } 692 else { 693 logmsg "Server knows $datasockf_mode DATA connection is already ". 694 "disconnected\n"; 695 } 696 697 if($datapid > 0) { 698 print DWRITE "QUIT\n"; 699 waitpid($datapid, 0); 700 unlink($datasockf_pidfile) if(-f $datasockf_pidfile); 701 logmsg "DATA sockfilt for $datasockf_mode data channel quits ". 702 "(pid $datapid)\n"; 703 } 704 else { 705 logmsg "DATA sockfilt for $datasockf_mode data channel already ". 706 "dead\n"; 707 } 708 709 logmsg "=====> Closed $datasockf_mode DATA connection\n"; 710 711 datasockf_state('STOPPED'); 712} 713 714################ 715################ SMTP commands 716################ 717 718# The type of server (SMTP or ESMTP) 719my $smtp_type; 720 721# The client (which normally contains the test number) 722my $smtp_client; 723 724sub EHLO_smtp { 725 my ($client) = @_; 726 my @data; 727 728 # TODO: Get the IP address of the client connection to use in the 729 # EHLO response when the client doesn't specify one but for now use 730 # 127.0.0.1 731 if(!$client) { 732 $client = "[127.0.0.1]"; 733 } 734 735 # Set the server type to ESMTP 736 $smtp_type = "ESMTP"; 737 738 # Calculate the EHLO response 739 push @data, "$smtp_type pingpong test server Hello $client"; 740 741 if((@capabilities) || (@auth_mechs)) { 742 my $mechs; 743 744 for my $c (@capabilities) { 745 push @data, $c; 746 } 747 748 for my $am (@auth_mechs) { 749 if(!$mechs) { 750 $mechs = "$am"; 751 } 752 else { 753 $mechs .= " $am"; 754 } 755 } 756 757 if($mechs) { 758 push @data, "AUTH $mechs"; 759 } 760 } 761 762 # Send the EHLO response 763 for(my $i = 0; $i < @data; $i++) { 764 my $d = $data[$i]; 765 766 if($i < @data - 1) { 767 sendcontrol "250-$d\r\n"; 768 } 769 else { 770 sendcontrol "250 $d\r\n"; 771 } 772 } 773 774 # Store the client (as it may contain the test number) 775 $smtp_client = $client; 776 777 return 0; 778} 779 780sub HELO_smtp { 781 my ($client) = @_; 782 783 # TODO: Get the IP address of the client connection to use in the HELO 784 # response when the client doesn't specify one but for now use 127.0.0.1 785 if(!$client) { 786 $client = "[127.0.0.1]"; 787 } 788 789 # Set the server type to SMTP 790 $smtp_type = "SMTP"; 791 792 # Send the HELO response 793 sendcontrol "250 $smtp_type pingpong test server Hello $client\r\n"; 794 795 # Store the client (as it may contain the test number) 796 $smtp_client = $client; 797 798 return 0; 799} 800 801sub MAIL_smtp { 802 my ($args) = @_; 803 804 logmsg "MAIL_smtp got $args\n"; 805 806 if (!$args) { 807 sendcontrol "501 Unrecognized parameter\r\n"; 808 } 809 else { 810 my $from; 811 my $size; 812 my @elements = split(/ /, $args); 813 814 # Get the FROM and SIZE parameters 815 for my $e (@elements) { 816 if($e =~ /^FROM:(.*)$/) { 817 $from = $1; 818 } 819 elsif($e =~ /^SIZE=(\d+)$/) { 820 $size = $1; 821 } 822 } 823 824 # Validate the from address (only <> and a valid email address inside 825 # <> are allowed, such as <user@example.com>) 826 if ((!$from) || (($from ne "<>") && ($from !~ 827 /^<([a-zA-Z0-9._%+-]+)\@([a-zA-Z0-9.-]+).([a-zA-Z]{2,4})>$/))) { 828 sendcontrol "501 Invalid address\r\n"; 829 } 830 else { 831 my @found; 832 my $valid = 1; 833 834 # Check the capabilities for SIZE and if the specified size is 835 # greater than the message size then reject it 836 if (@found = grep /^SIZE (\d+)$/, @capabilities) { 837 if ($found[0] =~ /^SIZE (\d+)$/) { 838 if ($size > $1) { 839 $valid = 0; 840 } 841 } 842 } 843 844 if(!$valid) { 845 sendcontrol "552 Message size too large\r\n"; 846 } 847 else { 848 sendcontrol "250 Sender OK\r\n"; 849 } 850 } 851 } 852 853 return 0; 854} 855 856sub RCPT_smtp { 857 my ($args) = @_; 858 859 logmsg "RCPT_smtp got $args\n"; 860 861 # Get the TO parameter 862 if($args !~ /^TO:(.*)/) { 863 sendcontrol "501 Unrecognized parameter\r\n"; 864 } 865 else { 866 my $to = $1; 867 868 # Validate the to address (only a valid email address inside <> is 869 # allowed, such as <user@example.com>) 870 if ($to !~ 871 /^<([a-zA-Z0-9._%+-]+)\@([a-zA-Z0-9.-]+).([a-zA-Z]{2,4})>$/) { 872 sendcontrol "501 Invalid address\r\n"; 873 } 874 else { 875 sendcontrol "250 Recipient OK\r\n"; 876 } 877 } 878 879 return 0; 880} 881 882sub DATA_smtp { 883 my ($args) = @_; 884 885 if ($args) { 886 sendcontrol "501 Unrecognized parameter\r\n"; 887 } 888 elsif ($smtp_client !~ /^(\d*)$/) { 889 sendcontrol "501 Invalid arguments\r\n"; 890 } 891 else { 892 sendcontrol "354 Show me the mail\r\n"; 893 894 my $testno = $smtp_client; 895 my $filename = "log/upload.$testno"; 896 897 logmsg "Store test number $testno in $filename\n"; 898 899 open(FILE, ">$filename") || 900 return 0; # failed to open output 901 902 my $line; 903 my $ulsize=0; 904 my $disc=0; 905 my $raw; 906 while (5 == (sysread \*SFREAD, $line, 5)) { 907 if($line eq "DATA\n") { 908 my $i; 909 my $eob; 910 sysread \*SFREAD, $i, 5; 911 912 my $size = 0; 913 if($i =~ /^([0-9a-fA-F]{4})\n/) { 914 $size = hex($1); 915 } 916 917 read_mainsockf(\$line, $size); 918 919 $ulsize += $size; 920 print FILE $line if(!$nosave); 921 922 $raw .= $line; 923 if($raw =~ /(?:^|\x0d\x0a)\x2e\x0d\x0a/) { 924 # end of data marker! 925 $eob = 1; 926 } 927 928 logmsg "> Appending $size bytes to file\n"; 929 930 if($eob) { 931 logmsg "Found SMTP EOB marker\n"; 932 last; 933 } 934 } 935 elsif($line eq "DISC\n") { 936 # disconnect! 937 $disc=1; 938 last; 939 } 940 else { 941 logmsg "No support for: $line"; 942 last; 943 } 944 } 945 946 if($nosave) { 947 print FILE "$ulsize bytes would've been stored here\n"; 948 } 949 950 close(FILE); 951 952 logmsg "received $ulsize bytes upload\n"; 953 954 sendcontrol "250 OK, data received!\r\n"; 955 } 956 957 return 0; 958} 959 960sub NOOP_smtp { 961 my ($args) = @_; 962 963 if($args) { 964 sendcontrol "501 Unrecognized parameter\r\n"; 965 } 966 else { 967 sendcontrol "250 OK\r\n"; 968 } 969 970 return 0; 971} 972 973sub RSET_smtp { 974 my ($args) = @_; 975 976 if($args) { 977 sendcontrol "501 Unrecognized parameter\r\n"; 978 } 979 else { 980 sendcontrol "250 Resetting\r\n"; 981 } 982 983 return 0; 984} 985 986sub HELP_smtp { 987 my ($args) = @_; 988 989 # One argument is optional 990 if($args) { 991 logmsg "HELP_smtp got $args\n"; 992 } 993 994 if($smtp_client eq "verifiedserver") { 995 # This is the secret command that verifies that this actually is 996 # the curl test server 997 sendcontrol "214 WE ROOLZ: $$\r\n"; 998 999 if($verbose) { 1000 print STDERR "FTPD: We returned proof we are the test server\n"; 1001 } 1002 1003 logmsg "return proof we are we\n"; 1004 } 1005 else { 1006 sendcontrol "214-This server supports the following commands:\r\n"; 1007 1008 if(@auth_mechs) { 1009 sendcontrol "214 HELO EHLO RCPT DATA RSET MAIL VRFY EXPN QUIT HELP AUTH\r\n"; 1010 } 1011 else { 1012 sendcontrol "214 HELO EHLO RCPT DATA RSET MAIL VRFY EXPN QUIT HELP\r\n"; 1013 } 1014 } 1015 1016 return 0; 1017} 1018 1019sub VRFY_smtp { 1020 my ($args) = @_; 1021 my ($username, $address) = split(/ /, $args, 2); 1022 1023 logmsg "VRFY_smtp got $args\n"; 1024 1025 if($username eq "") { 1026 sendcontrol "501 Unrecognized parameter\r\n"; 1027 } 1028 else { 1029 my @data = getreplydata($smtp_client); 1030 1031 for my $d (@data) { 1032 sendcontrol $d; 1033 } 1034 } 1035 1036 return 0; 1037} 1038 1039sub EXPN_smtp { 1040 my ($list_name) = @_; 1041 1042 logmsg "EXPN_smtp got $list_name\n"; 1043 1044 if(!$list_name) { 1045 sendcontrol "501 Unrecognized parameter\r\n"; 1046 } 1047 else { 1048 my @data = getreplydata($smtp_client); 1049 1050 for my $d (@data) { 1051 sendcontrol $d; 1052 } 1053 } 1054 1055 return 0; 1056} 1057 1058sub QUIT_smtp { 1059 sendcontrol "221 curl $smtp_type server signing off\r\n"; 1060 1061 return 0; 1062} 1063 1064# What was deleted by IMAP STORE / POP3 DELE commands 1065my @deleted; 1066 1067################ 1068################ IMAP commands 1069################ 1070 1071# global to allow the command functions to read it 1072my $cmdid; 1073 1074# what was picked by SELECT 1075my $selected; 1076 1077# Any IMAP parameter can come in escaped and in double quotes. 1078# This function is dumb (so far) and just removes the quotes if present. 1079sub fix_imap_params { 1080 foreach (@_) { 1081 $_ = $1 if /^"(.*)"$/; 1082 } 1083} 1084 1085sub CAPABILITY_imap { 1086 if((!@capabilities) && (!@auth_mechs)) { 1087 sendcontrol "$cmdid BAD Command\r\n"; 1088 } 1089 else { 1090 my $data; 1091 1092 # Calculate the CAPABILITY response 1093 $data = "* CAPABILITY IMAP4"; 1094 1095 for my $c (@capabilities) { 1096 $data .= " $c"; 1097 } 1098 1099 for my $am (@auth_mechs) { 1100 $data .= " AUTH=$am"; 1101 } 1102 1103 $data .= " pingpong test server\r\n"; 1104 1105 # Send the CAPABILITY response 1106 sendcontrol $data; 1107 sendcontrol "$cmdid OK CAPABILITY completed\r\n"; 1108 } 1109 1110 return 0; 1111} 1112 1113sub LOGIN_imap { 1114 my ($args) = @_; 1115 my ($user, $password) = split(/ /, $args, 2); 1116 fix_imap_params($user, $password); 1117 1118 logmsg "LOGIN_imap got $args\n"; 1119 1120 if ($user eq "") { 1121 sendcontrol "$cmdid BAD Command Argument\r\n"; 1122 } 1123 else { 1124 sendcontrol "$cmdid OK LOGIN completed\r\n"; 1125 } 1126 1127 return 0; 1128} 1129 1130sub SELECT_imap { 1131 my ($mailbox) = @_; 1132 fix_imap_params($mailbox); 1133 1134 logmsg "SELECT_imap got test $mailbox\n"; 1135 1136 if($mailbox eq "") { 1137 sendcontrol "$cmdid BAD Command Argument\r\n"; 1138 } 1139 else { 1140 # Example from RFC 3501, 6.3.1. SELECT Command 1141 sendcontrol "* 172 EXISTS\r\n"; 1142 sendcontrol "* 1 RECENT\r\n"; 1143 sendcontrol "* OK [UNSEEN 12] Message 12 is first unseen\r\n"; 1144 sendcontrol "* OK [UIDVALIDITY 3857529045] UIDs valid\r\n"; 1145 sendcontrol "* OK [UIDNEXT 4392] Predicted next UID\r\n"; 1146 sendcontrol "* FLAGS (\\Answered \\Flagged \\Deleted \\Seen \\Draft)\r\n"; 1147 sendcontrol "* OK [PERMANENTFLAGS (\\Deleted \\Seen \\*)] Limited\r\n"; 1148 sendcontrol "$cmdid OK [READ-WRITE] SELECT completed\r\n"; 1149 1150 $selected = $mailbox; 1151 } 1152 1153 return 0; 1154} 1155 1156sub FETCH_imap { 1157 my ($args) = @_; 1158 my ($uid, $how) = split(/ /, $args, 2); 1159 fix_imap_params($uid, $how); 1160 1161 logmsg "FETCH_imap got $args\n"; 1162 1163 if ($selected eq "") { 1164 sendcontrol "$cmdid BAD Command received in Invalid state\r\n"; 1165 } 1166 else { 1167 my @data; 1168 my $size; 1169 1170 if($selected eq "verifiedserver") { 1171 # this is the secret command that verifies that this actually is 1172 # the curl test server 1173 my $response = "WE ROOLZ: $$\r\n"; 1174 if($verbose) { 1175 print STDERR "FTPD: We returned proof we are the test server\n"; 1176 } 1177 $data[0] = $response; 1178 logmsg "return proof we are we\n"; 1179 } 1180 else { 1181 # send mail content 1182 logmsg "retrieve a mail\n"; 1183 1184 @data = getreplydata($selected); 1185 } 1186 1187 for (@data) { 1188 $size += length($_); 1189 } 1190 1191 sendcontrol "* $uid FETCH ($how {$size}\r\n"; 1192 1193 for my $d (@data) { 1194 sendcontrol $d; 1195 } 1196 1197 sendcontrol ")\r\n"; 1198 sendcontrol "$cmdid OK FETCH completed\r\n"; 1199 } 1200 1201 return 0; 1202} 1203 1204sub APPEND_imap { 1205 my ($args) = @_; 1206 1207 logmsg "APPEND_imap got $args\r\n"; 1208 1209 $args =~ /^([^ ]+) [^{]*\{(\d+)\}$/; 1210 my ($mailbox, $size) = ($1, $2); 1211 fix_imap_params($mailbox); 1212 1213 if($mailbox eq "") { 1214 sendcontrol "$cmdid BAD Command Argument\r\n"; 1215 } 1216 else { 1217 sendcontrol "+ Ready for literal data\r\n"; 1218 1219 my $testno = $mailbox; 1220 my $filename = "log/upload.$testno"; 1221 1222 logmsg "Store test number $testno in $filename\n"; 1223 1224 open(FILE, ">$filename") || 1225 return 0; # failed to open output 1226 1227 my $received = 0; 1228 my $line; 1229 while(5 == (sysread \*SFREAD, $line, 5)) { 1230 if($line eq "DATA\n") { 1231 sysread \*SFREAD, $line, 5; 1232 1233 my $chunksize = 0; 1234 if($line =~ /^([0-9a-fA-F]{4})\n/) { 1235 $chunksize = hex($1); 1236 } 1237 1238 read_mainsockf(\$line, $chunksize); 1239 1240 my $left = $size - $received; 1241 my $datasize = ($left > $chunksize) ? $chunksize : $left; 1242 1243 if($datasize > 0) { 1244 logmsg "> Appending $datasize bytes to file\n"; 1245 print FILE substr($line, 0, $datasize) if(!$nosave); 1246 $line = substr($line, $datasize); 1247 1248 $received += $datasize; 1249 if($received == $size) { 1250 logmsg "Received all data, waiting for final CRLF.\n"; 1251 } 1252 } 1253 1254 if($received == $size && $line eq "\r\n") { 1255 last; 1256 } 1257 } 1258 elsif($line eq "DISC\n") { 1259 logmsg "Unexpected disconnect!\n"; 1260 last; 1261 } 1262 else { 1263 logmsg "No support for: $line"; 1264 last; 1265 } 1266 } 1267 1268 if($nosave) { 1269 print FILE "$size bytes would've been stored here\n"; 1270 } 1271 1272 close(FILE); 1273 1274 logmsg "received $size bytes upload\n"; 1275 1276 sendcontrol "$cmdid OK APPEND completed\r\n"; 1277 } 1278 1279 return 0; 1280} 1281 1282sub STORE_imap { 1283 my ($args) = @_; 1284 my ($uid, $what, $value) = split(/ /, $args, 3); 1285 fix_imap_params($uid); 1286 1287 logmsg "STORE_imap got $args\n"; 1288 1289 if ($selected eq "") { 1290 sendcontrol "$cmdid BAD Command received in Invalid state\r\n"; 1291 } 1292 elsif (($uid eq "") || ($what ne "+Flags") || ($value eq "")) { 1293 sendcontrol "$cmdid BAD Command Argument\r\n"; 1294 } 1295 else { 1296 if($value eq "\\Deleted") { 1297 push(@deleted, $uid); 1298 } 1299 1300 sendcontrol "* $uid FETCH (FLAGS (\\Seen $value))\r\n"; 1301 sendcontrol "$cmdid OK STORE completed\r\n"; 1302 } 1303 1304 return 0; 1305} 1306 1307sub LIST_imap { 1308 my ($args) = @_; 1309 my ($reference, $mailbox) = split(/ /, $args, 2); 1310 fix_imap_params($reference, $mailbox); 1311 1312 logmsg "LIST_imap got $args\n"; 1313 1314 if ($reference eq "") { 1315 sendcontrol "$cmdid BAD Command Argument\r\n"; 1316 } 1317 elsif ($reference eq "verifiedserver") { 1318 # this is the secret command that verifies that this actually is 1319 # the curl test server 1320 sendcontrol "* LIST () \"/\" \"WE ROOLZ: $$\"\r\n"; 1321 sendcontrol "$cmdid OK LIST Completed\r\n"; 1322 1323 if($verbose) { 1324 print STDERR "FTPD: We returned proof we are the test server\n"; 1325 } 1326 1327 logmsg "return proof we are we\n"; 1328 } 1329 else { 1330 my @data = getreplydata($reference); 1331 1332 for my $d (@data) { 1333 sendcontrol $d; 1334 } 1335 1336 sendcontrol "$cmdid OK LIST Completed\r\n"; 1337 } 1338 1339 return 0; 1340} 1341 1342sub LSUB_imap { 1343 my ($args) = @_; 1344 my ($reference, $mailbox) = split(/ /, $args, 2); 1345 fix_imap_params($reference, $mailbox); 1346 1347 logmsg "LSUB_imap got $args\n"; 1348 1349 if ($reference eq "") { 1350 sendcontrol "$cmdid BAD Command Argument\r\n"; 1351 } 1352 else { 1353 my @data = getreplydata($reference); 1354 1355 for my $d (@data) { 1356 sendcontrol $d; 1357 } 1358 1359 sendcontrol "$cmdid OK LSUB Completed\r\n"; 1360 } 1361 1362 return 0; 1363} 1364 1365sub EXAMINE_imap { 1366 my ($mailbox) = @_; 1367 fix_imap_params($mailbox); 1368 1369 logmsg "EXAMINE_imap got $mailbox\n"; 1370 1371 if ($mailbox eq "") { 1372 sendcontrol "$cmdid BAD Command Argument\r\n"; 1373 } 1374 else { 1375 my @data = getreplydata($mailbox); 1376 1377 for my $d (@data) { 1378 sendcontrol $d; 1379 } 1380 1381 sendcontrol "$cmdid OK [READ-ONLY] EXAMINE completed\r\n"; 1382 } 1383 1384 return 0; 1385} 1386 1387sub STATUS_imap { 1388 my ($args) = @_; 1389 my ($mailbox, $what) = split(/ /, $args, 2); 1390 fix_imap_params($mailbox); 1391 1392 logmsg "STATUS_imap got $args\n"; 1393 1394 if ($mailbox eq "") { 1395 sendcontrol "$cmdid BAD Command Argument\r\n"; 1396 } 1397 else { 1398 my @data = getreplydata($mailbox); 1399 1400 for my $d (@data) { 1401 sendcontrol $d; 1402 } 1403 1404 sendcontrol "$cmdid OK STATUS completed\r\n"; 1405 } 1406 1407 return 0; 1408} 1409 1410sub SEARCH_imap { 1411 my ($what) = @_; 1412 fix_imap_params($what); 1413 1414 logmsg "SEARCH_imap got $what\n"; 1415 1416 if ($selected eq "") { 1417 sendcontrol "$cmdid BAD Command received in Invalid state\r\n"; 1418 } 1419 elsif ($what eq "") { 1420 sendcontrol "$cmdid BAD Command Argument\r\n"; 1421 } 1422 else { 1423 my @data = getreplydata($selected); 1424 1425 for my $d (@data) { 1426 sendcontrol $d; 1427 } 1428 1429 sendcontrol "$cmdid OK SEARCH completed\r\n"; 1430 } 1431 1432 return 0; 1433} 1434 1435sub CREATE_imap { 1436 my ($args) = @_; 1437 fix_imap_params($args); 1438 1439 logmsg "CREATE_imap got $args\n"; 1440 1441 if ($args eq "") { 1442 sendcontrol "$cmdid BAD Command Argument\r\n"; 1443 } 1444 else { 1445 sendcontrol "$cmdid OK CREATE completed\r\n"; 1446 } 1447 1448 return 0; 1449} 1450 1451sub DELETE_imap { 1452 my ($args) = @_; 1453 fix_imap_params($args); 1454 1455 logmsg "DELETE_imap got $args\n"; 1456 1457 if ($args eq "") { 1458 sendcontrol "$cmdid BAD Command Argument\r\n"; 1459 } 1460 else { 1461 sendcontrol "$cmdid OK DELETE completed\r\n"; 1462 } 1463 1464 return 0; 1465} 1466 1467sub RENAME_imap { 1468 my ($args) = @_; 1469 my ($from_mailbox, $to_mailbox) = split(/ /, $args, 2); 1470 fix_imap_params($from_mailbox, $to_mailbox); 1471 1472 logmsg "RENAME_imap got $args\n"; 1473 1474 if (($from_mailbox eq "") || ($to_mailbox eq "")) { 1475 sendcontrol "$cmdid BAD Command Argument\r\n"; 1476 } 1477 else { 1478 sendcontrol "$cmdid OK RENAME completed\r\n"; 1479 } 1480 1481 return 0; 1482} 1483 1484sub CHECK_imap { 1485 if ($selected eq "") { 1486 sendcontrol "$cmdid BAD Command received in Invalid state\r\n"; 1487 } 1488 else { 1489 sendcontrol "$cmdid OK CHECK completed\r\n"; 1490 } 1491 1492 return 0; 1493} 1494 1495sub CLOSE_imap { 1496 if ($selected eq "") { 1497 sendcontrol "$cmdid BAD Command received in Invalid state\r\n"; 1498 } 1499 elsif (!@deleted) { 1500 sendcontrol "$cmdid BAD Command Argument\r\n"; 1501 } 1502 else { 1503 sendcontrol "$cmdid OK CLOSE completed\r\n"; 1504 1505 @deleted = (); 1506 } 1507 1508 return 0; 1509} 1510 1511sub EXPUNGE_imap { 1512 if ($selected eq "") { 1513 sendcontrol "$cmdid BAD Command received in Invalid state\r\n"; 1514 } 1515 else { 1516 if (!@deleted) { 1517 # Report the number of existing messages as per the SELECT 1518 # command 1519 sendcontrol "* 172 EXISTS\r\n"; 1520 } 1521 else { 1522 # Report the message UIDs being deleted 1523 for my $d (@deleted) { 1524 sendcontrol "* $d EXPUNGE\r\n"; 1525 } 1526 1527 @deleted = (); 1528 } 1529 1530 sendcontrol "$cmdid OK EXPUNGE completed\r\n"; 1531 } 1532 1533 return 0; 1534} 1535 1536sub COPY_imap { 1537 my ($args) = @_; 1538 my ($uid, $mailbox) = split(/ /, $args, 2); 1539 fix_imap_params($uid, $mailbox); 1540 1541 logmsg "COPY_imap got $args\n"; 1542 1543 if (($uid eq "") || ($mailbox eq "")) { 1544 sendcontrol "$cmdid BAD Command Argument\r\n"; 1545 } 1546 else { 1547 sendcontrol "$cmdid OK COPY completed\r\n"; 1548 } 1549 1550 return 0; 1551} 1552 1553sub UID_imap { 1554 my ($args) = @_; 1555 my ($command) = split(/ /, $args, 1); 1556 fix_imap_params($command); 1557 1558 logmsg "UID_imap got $args\n"; 1559 1560 if ($selected eq "") { 1561 sendcontrol "$cmdid BAD Command received in Invalid state\r\n"; 1562 } 1563 elsif (substr($command, 0, 5) eq "FETCH"){ 1564 my $func = $commandfunc{"FETCH"}; 1565 if($func) { 1566 &$func($args, $command); 1567 } 1568 } 1569 elsif (($command ne "COPY") && 1570 ($command ne "STORE") && ($command ne "SEARCH")) { 1571 sendcontrol "$cmdid BAD Command Argument\r\n"; 1572 } 1573 else { 1574 my @data = getreplydata($selected); 1575 1576 for my $d (@data) { 1577 sendcontrol $d; 1578 } 1579 1580 sendcontrol "$cmdid OK $command completed\r\n"; 1581 } 1582 1583 return 0; 1584} 1585 1586sub NOOP_imap { 1587 my ($args) = @_; 1588 my @data = ( 1589 "* 22 EXPUNGE\r\n", 1590 "* 23 EXISTS\r\n", 1591 "* 3 RECENT\r\n", 1592 "* 14 FETCH (FLAGS (\\Seen \\Deleted))\r\n", 1593 ); 1594 1595 if ($args) { 1596 sendcontrol "$cmdid BAD Command Argument\r\n"; 1597 } 1598 else { 1599 for my $d (@data) { 1600 sendcontrol $d; 1601 } 1602 1603 sendcontrol "$cmdid OK NOOP completed\r\n"; 1604 } 1605 1606 return 0; 1607} 1608 1609sub LOGOUT_imap { 1610 sendcontrol "* BYE curl IMAP server signing off\r\n"; 1611 sendcontrol "$cmdid OK LOGOUT completed\r\n"; 1612 1613 return 0; 1614} 1615 1616################ 1617################ POP3 commands 1618################ 1619 1620# Who is attempting to log in 1621my $username; 1622 1623sub CAPA_pop3 { 1624 my @list = (); 1625 my $mechs; 1626 1627 # Calculate the capability list based on the specified capabilities 1628 # (except APOP) and any authentication mechanisms 1629 for my $c (@capabilities) { 1630 push @list, "$c\r\n" unless $c eq "APOP"; 1631 } 1632 1633 for my $am (@auth_mechs) { 1634 if(!$mechs) { 1635 $mechs = "$am"; 1636 } 1637 else { 1638 $mechs .= " $am"; 1639 } 1640 } 1641 1642 if($mechs) { 1643 push @list, "SASL $mechs\r\n"; 1644 } 1645 1646 if(!@list) { 1647 sendcontrol "-ERR Unrecognized command\r\n"; 1648 } 1649 else { 1650 my @data = (); 1651 1652 # Calculate the CAPA response 1653 push @data, "+OK List of capabilities follows\r\n"; 1654 1655 for my $l (@list) { 1656 push @data, "$l\r\n"; 1657 } 1658 1659 push @data, "IMPLEMENTATION POP3 pingpong test server\r\n"; 1660 1661 # Send the CAPA response 1662 for my $d (@data) { 1663 sendcontrol $d; 1664 } 1665 1666 # End with the magic 3-byte end of listing marker 1667 sendcontrol ".\r\n"; 1668 } 1669 1670 return 0; 1671} 1672 1673sub APOP_pop3 { 1674 my ($args) = @_; 1675 my ($user, $secret) = split(/ /, $args, 2); 1676 1677 if (!grep /^APOP$/, @capabilities) { 1678 sendcontrol "-ERR Unrecognized command\r\n"; 1679 } 1680 elsif (($user eq "") || ($secret eq "")) { 1681 sendcontrol "-ERR Protocol error\r\n"; 1682 } 1683 else { 1684 my $digest = Digest::MD5::md5_hex($POP3_TIMESTAMP, $TEXT_PASSWORD); 1685 1686 if ($secret ne $digest) { 1687 sendcontrol "-ERR Login failure\r\n"; 1688 } 1689 else { 1690 sendcontrol "+OK Login successful\r\n"; 1691 } 1692 } 1693 1694 return 0; 1695} 1696 1697sub AUTH_pop3 { 1698 if(!@auth_mechs) { 1699 sendcontrol "-ERR Unrecognized command\r\n"; 1700 } 1701 else { 1702 my @data = (); 1703 1704 # Calculate the AUTH response 1705 push @data, "+OK List of supported mechanisms follows\r\n"; 1706 1707 for my $am (@auth_mechs) { 1708 push @data, "$am\r\n"; 1709 } 1710 1711 # Send the AUTH response 1712 for my $d (@data) { 1713 sendcontrol $d; 1714 } 1715 1716 # End with the magic 3-byte end of listing marker 1717 sendcontrol ".\r\n"; 1718 } 1719 1720 return 0; 1721} 1722 1723sub USER_pop3 { 1724 my ($user) = @_; 1725 1726 logmsg "USER_pop3 got $user\n"; 1727 1728 if (!$user) { 1729 sendcontrol "-ERR Protocol error\r\n"; 1730 } 1731 else { 1732 $username = $user; 1733 1734 sendcontrol "+OK\r\n"; 1735 } 1736 1737 return 0; 1738} 1739 1740sub PASS_pop3 { 1741 my ($password) = @_; 1742 1743 logmsg "PASS_pop3 got $password\n"; 1744 1745 sendcontrol "+OK Login successful\r\n"; 1746 1747 return 0; 1748} 1749 1750sub RETR_pop3 { 1751 my ($msgid) = @_; 1752 my @data; 1753 1754 if($msgid =~ /^verifiedserver$/) { 1755 # this is the secret command that verifies that this actually is 1756 # the curl test server 1757 my $response = "WE ROOLZ: $$\r\n"; 1758 if($verbose) { 1759 print STDERR "FTPD: We returned proof we are the test server\n"; 1760 } 1761 $data[0] = $response; 1762 logmsg "return proof we are we\n"; 1763 } 1764 else { 1765 # send mail content 1766 logmsg "retrieve a mail\n"; 1767 1768 @data = getreplydata($msgid); 1769 } 1770 1771 sendcontrol "+OK Mail transfer starts\r\n"; 1772 1773 for my $d (@data) { 1774 sendcontrol $d; 1775 } 1776 1777 # end with the magic 3-byte end of mail marker, assumes that the 1778 # mail body ends with a CRLF! 1779 sendcontrol ".\r\n"; 1780 1781 return 0; 1782} 1783 1784sub LIST_pop3 { 1785 # This is a built-in fake-message list 1786 my @data = ( 1787 "1 100\r\n", 1788 "2 4294967400\r\n", # > 4 GB 1789 "3 200\r\n", 1790 ); 1791 1792 logmsg "retrieve a message list\n"; 1793 1794 sendcontrol "+OK Listing starts\r\n"; 1795 1796 for my $d (@data) { 1797 sendcontrol $d; 1798 } 1799 1800 # End with the magic 3-byte end of listing marker 1801 sendcontrol ".\r\n"; 1802 1803 return 0; 1804} 1805 1806sub DELE_pop3 { 1807 my ($msgid) = @_; 1808 1809 logmsg "DELE_pop3 got $msgid\n"; 1810 1811 if (!$msgid) { 1812 sendcontrol "-ERR Protocol error\r\n"; 1813 } 1814 else { 1815 push (@deleted, $msgid); 1816 1817 sendcontrol "+OK\r\n"; 1818 } 1819 1820 return 0; 1821} 1822 1823sub STAT_pop3 { 1824 my ($args) = @_; 1825 1826 if ($args) { 1827 sendcontrol "-ERR Protocol error\r\n"; 1828 } 1829 else { 1830 # Send statistics for the built-in fake message list as 1831 # detailed in the LIST_pop3 function above 1832 sendcontrol "+OK 3 4294967800\r\n"; 1833 } 1834 1835 return 0; 1836} 1837 1838sub NOOP_pop3 { 1839 my ($args) = @_; 1840 1841 if ($args) { 1842 sendcontrol "-ERR Protocol error\r\n"; 1843 } 1844 else { 1845 sendcontrol "+OK\r\n"; 1846 } 1847 1848 return 0; 1849} 1850 1851sub UIDL_pop3 { 1852 # This is a built-in fake-message UID list 1853 my @data = ( 1854 "1 1\r\n", 1855 "2 2\r\n", 1856 "3 4\r\n", # Note that UID 3 is a simulated "deleted" message 1857 ); 1858 1859 if (!grep /^UIDL$/, @capabilities) { 1860 sendcontrol "-ERR Unrecognized command\r\n"; 1861 } 1862 else { 1863 logmsg "retrieve a message UID list\n"; 1864 1865 sendcontrol "+OK Listing starts\r\n"; 1866 1867 for my $d (@data) { 1868 sendcontrol $d; 1869 } 1870 1871 # End with the magic 3-byte end of listing marker 1872 sendcontrol ".\r\n"; 1873 } 1874 1875 return 0; 1876} 1877 1878sub TOP_pop3 { 1879 my ($args) = @_; 1880 my ($msgid, $lines) = split(/ /, $args, 2); 1881 1882 logmsg "TOP_pop3 got $args\n"; 1883 1884 if (!grep /^TOP$/, @capabilities) { 1885 sendcontrol "-ERR Unrecognized command\r\n"; 1886 } 1887 elsif (($msgid eq "") || ($lines eq "")) { 1888 sendcontrol "-ERR Protocol error\r\n"; 1889 } 1890 else { 1891 if ($lines == "0") { 1892 logmsg "retrieve header of mail\n"; 1893 } 1894 else { 1895 logmsg "retrieve top $lines lines of mail\n"; 1896 } 1897 1898 my @data = getreplydata($msgid); 1899 1900 sendcontrol "+OK Mail transfer starts\r\n"; 1901 1902 # Send mail content 1903 for my $d (@data) { 1904 sendcontrol $d; 1905 } 1906 1907 # End with the magic 3-byte end of mail marker, assumes that the 1908 # mail body ends with a CRLF! 1909 sendcontrol ".\r\n"; 1910 } 1911 1912 return 0; 1913} 1914 1915sub RSET_pop3 { 1916 my ($args) = @_; 1917 1918 if ($args) { 1919 sendcontrol "-ERR Protocol error\r\n"; 1920 } 1921 else { 1922 if (@deleted) { 1923 logmsg "resetting @deleted message(s)\n"; 1924 1925 @deleted = (); 1926 } 1927 1928 sendcontrol "+OK\r\n"; 1929 } 1930 1931 return 0; 1932} 1933 1934sub QUIT_pop3 { 1935 if(@deleted) { 1936 logmsg "deleting @deleted message(s)\n"; 1937 1938 @deleted = (); 1939 } 1940 1941 sendcontrol "+OK curl POP3 server signing off\r\n"; 1942 1943 return 0; 1944} 1945 1946################ 1947################ FTP commands 1948################ 1949my $rest=0; 1950sub REST_ftp { 1951 $rest = $_[0]; 1952 logmsg "Set REST position to $rest\n" 1953} 1954 1955sub switch_directory_goto { 1956 my $target_dir = $_; 1957 1958 if(!$ftptargetdir) { 1959 $ftptargetdir = "/"; 1960 } 1961 1962 if($target_dir eq "") { 1963 $ftptargetdir = "/"; 1964 } 1965 elsif($target_dir eq "..") { 1966 if($ftptargetdir eq "/") { 1967 $ftptargetdir = "/"; 1968 } 1969 else { 1970 $ftptargetdir =~ s/[[:alnum:]]+\/$//; 1971 } 1972 } 1973 else { 1974 $ftptargetdir .= $target_dir . "/"; 1975 } 1976} 1977 1978sub switch_directory { 1979 my $target_dir = $_[0]; 1980 1981 if($target_dir =~ /^test-(\d+)/) { 1982 $cwd_testno = $1; 1983 } 1984 elsif($target_dir eq "/") { 1985 $ftptargetdir = "/"; 1986 } 1987 else { 1988 my @dirs = split("/", $target_dir); 1989 for(@dirs) { 1990 switch_directory_goto($_); 1991 } 1992 } 1993} 1994 1995sub CWD_ftp { 1996 my ($folder, $fullcommand) = $_[0]; 1997 switch_directory($folder); 1998 if($ftptargetdir =~ /^\/fully_simulated/) { 1999 $ftplistparserstate = "enabled"; 2000 } 2001 else { 2002 undef $ftplistparserstate; 2003 } 2004} 2005 2006sub PWD_ftp { 2007 my $mydir; 2008 $mydir = $ftptargetdir ? $ftptargetdir : "/"; 2009 2010 if($mydir ne "/") { 2011 $mydir =~ s/\/$//; 2012 } 2013 sendcontrol "257 \"$mydir\" is current directory\r\n"; 2014} 2015 2016sub LIST_ftp { 2017 # print "150 ASCII data connection for /bin/ls (193.15.23.1,59196) (0 bytes)\r\n"; 2018 2019# this is a built-in fake-dir ;-) 2020my @ftpdir=("total 20\r\n", 2021"drwxr-xr-x 8 98 98 512 Oct 22 13:06 .\r\n", 2022"drwxr-xr-x 8 98 98 512 Oct 22 13:06 ..\r\n", 2023"drwxr-xr-x 2 98 98 512 May 2 1996 .NeXT\r\n", 2024"-r--r--r-- 1 0 1 35 Jul 16 1996 README\r\n", 2025"lrwxrwxrwx 1 0 1 7 Dec 9 1999 bin -> usr/bin\r\n", 2026"dr-xr-xr-x 2 0 1 512 Oct 1 1997 dev\r\n", 2027"drwxrwxrwx 2 98 98 512 May 29 16:04 download.html\r\n", 2028"dr-xr-xr-x 2 0 1 512 Nov 30 1995 etc\r\n", 2029"drwxrwxrwx 2 98 1 512 Oct 30 14:33 pub\r\n", 2030"dr-xr-xr-x 5 0 1 512 Oct 1 1997 usr\r\n"); 2031 2032 if($datasockf_conn eq 'no') { 2033 if($nodataconn425) { 2034 sendcontrol "150 Opening data connection\r\n"; 2035 sendcontrol "425 Can't open data connection\r\n"; 2036 } 2037 elsif($nodataconn421) { 2038 sendcontrol "150 Opening data connection\r\n"; 2039 sendcontrol "421 Connection timed out\r\n"; 2040 } 2041 elsif($nodataconn150) { 2042 sendcontrol "150 Opening data connection\r\n"; 2043 # client shall timeout 2044 } 2045 else { 2046 # client shall timeout 2047 } 2048 return 0; 2049 } 2050 2051 if($ftplistparserstate) { 2052 @ftpdir = ftp_contentlist($ftptargetdir); 2053 } 2054 2055 logmsg "pass LIST data on data connection\n"; 2056 2057 if($cwd_testno) { 2058 loadtest("$srcdir/data/test$cwd_testno"); 2059 2060 my @data = getpart("reply", "data"); 2061 for(@data) { 2062 my $send = $_; 2063 # convert all \n to \r\n for ASCII transfer 2064 $send =~ s/\r\n/\n/g; 2065 $send =~ s/\n/\r\n/g; 2066 logmsg "send $send as data\n"; 2067 senddata $send; 2068 } 2069 $cwd_testno = 0; # forget it again 2070 } 2071 else { 2072 # old hard-coded style 2073 for(@ftpdir) { 2074 senddata $_; 2075 } 2076 } 2077 close_dataconn(0); 2078 sendcontrol "226 ASCII transfer complete\r\n"; 2079 return 0; 2080} 2081 2082sub NLST_ftp { 2083 my @ftpdir=("file", "with space", "fake", "..", " ..", "funny", "README"); 2084 2085 if($datasockf_conn eq 'no') { 2086 if($nodataconn425) { 2087 sendcontrol "150 Opening data connection\r\n"; 2088 sendcontrol "425 Can't open data connection\r\n"; 2089 } 2090 elsif($nodataconn421) { 2091 sendcontrol "150 Opening data connection\r\n"; 2092 sendcontrol "421 Connection timed out\r\n"; 2093 } 2094 elsif($nodataconn150) { 2095 sendcontrol "150 Opening data connection\r\n"; 2096 # client shall timeout 2097 } 2098 else { 2099 # client shall timeout 2100 } 2101 return 0; 2102 } 2103 2104 logmsg "pass NLST data on data connection\n"; 2105 for(@ftpdir) { 2106 senddata "$_\r\n"; 2107 } 2108 close_dataconn(0); 2109 sendcontrol "226 ASCII transfer complete\r\n"; 2110 return 0; 2111} 2112 2113sub MDTM_ftp { 2114 my $testno = $_[0]; 2115 my $testpart = ""; 2116 if ($testno > 10000) { 2117 $testpart = $testno % 10000; 2118 $testno = int($testno / 10000); 2119 } 2120 2121 loadtest("$srcdir/data/test$testno"); 2122 2123 my @data = getpart("reply", "mdtm"); 2124 2125 my $reply = $data[0]; 2126 chomp $reply if($reply); 2127 2128 if($reply && ($reply =~ /^[+-]?\d+$/) && ($reply < 0)) { 2129 sendcontrol "550 $testno: no such file.\r\n"; 2130 } 2131 elsif($reply) { 2132 sendcontrol "$reply\r\n"; 2133 } 2134 else { 2135 sendcontrol "500 MDTM: no such command.\r\n"; 2136 } 2137 return 0; 2138} 2139 2140sub SIZE_ftp { 2141 my $testno = $_[0]; 2142 if($ftplistparserstate) { 2143 my $size = wildcard_filesize($ftptargetdir, $testno); 2144 if($size == -1) { 2145 sendcontrol "550 $testno: No such file or directory.\r\n"; 2146 } 2147 else { 2148 sendcontrol "213 $size\r\n"; 2149 } 2150 return 0; 2151 } 2152 2153 if($testno =~ /^verifiedserver$/) { 2154 my $response = "WE ROOLZ: $$\r\n"; 2155 my $size = length($response); 2156 sendcontrol "213 $size\r\n"; 2157 return 0; 2158 } 2159 2160 if($testno =~ /(\d+)\/?$/) { 2161 $testno = $1; 2162 } 2163 else { 2164 print STDERR "SIZE_ftp: invalid test number: $testno\n"; 2165 return 1; 2166 } 2167 2168 my $testpart = ""; 2169 if($testno > 10000) { 2170 $testpart = $testno % 10000; 2171 $testno = int($testno / 10000); 2172 } 2173 2174 loadtest("$srcdir/data/test$testno"); 2175 2176 my @data = getpart("reply", "size"); 2177 2178 my $size = $data[0]; 2179 2180 if($size) { 2181 if($size > -1) { 2182 sendcontrol "213 $size\r\n"; 2183 } 2184 else { 2185 sendcontrol "550 $testno: No such file or directory.\r\n"; 2186 } 2187 } 2188 else { 2189 $size=0; 2190 @data = getpart("reply", "data$testpart"); 2191 for(@data) { 2192 $size += length($_); 2193 } 2194 if($size) { 2195 sendcontrol "213 $size\r\n"; 2196 } 2197 else { 2198 sendcontrol "550 $testno: No such file or directory.\r\n"; 2199 } 2200 } 2201 return 0; 2202} 2203 2204sub RETR_ftp { 2205 my ($testno) = @_; 2206 2207 if($datasockf_conn eq 'no') { 2208 if($nodataconn425) { 2209 sendcontrol "150 Opening data connection\r\n"; 2210 sendcontrol "425 Can't open data connection\r\n"; 2211 } 2212 elsif($nodataconn421) { 2213 sendcontrol "150 Opening data connection\r\n"; 2214 sendcontrol "421 Connection timed out\r\n"; 2215 } 2216 elsif($nodataconn150) { 2217 sendcontrol "150 Opening data connection\r\n"; 2218 # client shall timeout 2219 } 2220 else { 2221 # client shall timeout 2222 } 2223 return 0; 2224 } 2225 2226 if($ftplistparserstate) { 2227 my @content = wildcard_getfile($ftptargetdir, $testno); 2228 if($content[0] == -1) { 2229 #file not found 2230 } 2231 else { 2232 my $size = length $content[1]; 2233 sendcontrol "150 Binary data connection for $testno ($size bytes).\r\n", 2234 senddata $content[1]; 2235 close_dataconn(0); 2236 sendcontrol "226 File transfer complete\r\n"; 2237 } 2238 return 0; 2239 } 2240 2241 if($testno =~ /^verifiedserver$/) { 2242 # this is the secret command that verifies that this actually is 2243 # the curl test server 2244 my $response = "WE ROOLZ: $$\r\n"; 2245 my $len = length($response); 2246 sendcontrol "150 Binary junk ($len bytes).\r\n"; 2247 senddata "WE ROOLZ: $$\r\n"; 2248 close_dataconn(0); 2249 sendcontrol "226 File transfer complete\r\n"; 2250 if($verbose) { 2251 print STDERR "FTPD: We returned proof we are the test server\n"; 2252 } 2253 return 0; 2254 } 2255 2256 $testno =~ s/^([^0-9]*)//; 2257 my $testpart = ""; 2258 if ($testno > 10000) { 2259 $testpart = $testno % 10000; 2260 $testno = int($testno / 10000); 2261 } 2262 2263 loadtest("$srcdir/data/test$testno"); 2264 2265 my @data = getpart("reply", "data$testpart"); 2266 2267 my $size=0; 2268 for(@data) { 2269 $size += length($_); 2270 } 2271 2272 my %hash = getpartattr("reply", "data$testpart"); 2273 2274 if($size || $hash{'sendzero'}) { 2275 2276 if($rest) { 2277 # move read pointer forward 2278 $size -= $rest; 2279 logmsg "REST $rest was removed from size, makes $size left\n"; 2280 $rest = 0; # reset REST offset again 2281 } 2282 if($retrweirdo) { 2283 sendcontrol "150 Binary data connection for $testno () ($size bytes).\r\n", 2284 "226 File transfer complete\r\n"; 2285 2286 for(@data) { 2287 my $send = $_; 2288 senddata $send; 2289 } 2290 close_dataconn(0); 2291 $retrweirdo=0; # switch off the weirdo again! 2292 } 2293 else { 2294 my $sz = "($size bytes)"; 2295 if($retrnosize) { 2296 $sz = "size?"; 2297 } 2298 2299 sendcontrol "150 Binary data connection for $testno () $sz.\r\n"; 2300 2301 for(@data) { 2302 my $send = $_; 2303 senddata $send; 2304 } 2305 close_dataconn(0); 2306 sendcontrol "226 File transfer complete\r\n"; 2307 } 2308 } 2309 else { 2310 sendcontrol "550 $testno: No such file or directory.\r\n"; 2311 } 2312 return 0; 2313} 2314 2315sub STOR_ftp { 2316 my $testno=$_[0]; 2317 2318 my $filename = "log/upload.$testno"; 2319 2320 if($datasockf_conn eq 'no') { 2321 if($nodataconn425) { 2322 sendcontrol "150 Opening data connection\r\n"; 2323 sendcontrol "425 Can't open data connection\r\n"; 2324 } 2325 elsif($nodataconn421) { 2326 sendcontrol "150 Opening data connection\r\n"; 2327 sendcontrol "421 Connection timed out\r\n"; 2328 } 2329 elsif($nodataconn150) { 2330 sendcontrol "150 Opening data connection\r\n"; 2331 # client shall timeout 2332 } 2333 else { 2334 # client shall timeout 2335 } 2336 return 0; 2337 } 2338 2339 logmsg "STOR test number $testno in $filename\n"; 2340 2341 sendcontrol "125 Gimme gimme gimme!\r\n"; 2342 2343 open(FILE, ">$filename") || 2344 return 0; # failed to open output 2345 2346 my $line; 2347 my $ulsize=0; 2348 my $disc=0; 2349 while (5 == (sysread DREAD, $line, 5)) { 2350 if($line eq "DATA\n") { 2351 my $i; 2352 sysread DREAD, $i, 5; 2353 2354 my $size = 0; 2355 if($i =~ /^([0-9a-fA-F]{4})\n/) { 2356 $size = hex($1); 2357 } 2358 2359 read_datasockf(\$line, $size); 2360 2361 #print STDERR " GOT: $size bytes\n"; 2362 2363 $ulsize += $size; 2364 print FILE $line if(!$nosave); 2365 logmsg "> Appending $size bytes to file\n"; 2366 } 2367 elsif($line eq "DISC\n") { 2368 # disconnect! 2369 $disc=1; 2370 last; 2371 } 2372 else { 2373 logmsg "No support for: $line"; 2374 last; 2375 } 2376 } 2377 if($nosave) { 2378 print FILE "$ulsize bytes would've been stored here\n"; 2379 } 2380 close(FILE); 2381 close_dataconn($disc); 2382 logmsg "received $ulsize bytes upload\n"; 2383 sendcontrol "226 File transfer complete\r\n"; 2384 return 0; 2385} 2386 2387sub PASV_ftp { 2388 my ($arg, $cmd)=@_; 2389 my $pasvport; 2390 my $bindonly = ($nodataconn) ? '--bindonly' : ''; 2391 2392 # kill previous data connection sockfilt when alive 2393 if($datasockf_runs eq 'yes') { 2394 killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data'); 2395 logmsg "DATA sockfilt for $datasockf_mode data channel killed\n"; 2396 } 2397 datasockf_state('STOPPED'); 2398 2399 logmsg "====> Passive DATA channel requested by client\n"; 2400 2401 logmsg "DATA sockfilt for passive data channel starting...\n"; 2402 2403 # We fire up a new sockfilt to do the data transfer for us. 2404 my $datasockfcmd = "./server/sockfilt " . 2405 "--ipv$ipvnum $bindonly --port 0 " . 2406 "--pidfile \"$datasockf_pidfile\" " . 2407 "--logfile \"$datasockf_logfile\""; 2408 $slavepid = open2(\*DREAD, \*DWRITE, $datasockfcmd); 2409 2410 if($nodataconn) { 2411 datasockf_state('PASSIVE_NODATACONN'); 2412 } 2413 else { 2414 datasockf_state('PASSIVE'); 2415 } 2416 2417 print STDERR "$datasockfcmd\n" if($verbose); 2418 2419 print DWRITE "PING\n"; 2420 my $pong; 2421 sysread_or_die(\*DREAD, \$pong, 5); 2422 2423 if($pong =~ /^FAIL/) { 2424 logmsg "DATA sockfilt said: FAIL\n"; 2425 logmsg "DATA sockfilt for passive data channel failed\n"; 2426 logmsg "DATA sockfilt not running\n"; 2427 datasockf_state('STOPPED'); 2428 sendcontrol "500 no free ports!\r\n"; 2429 return; 2430 } 2431 elsif($pong !~ /^PONG/) { 2432 logmsg "DATA sockfilt unexpected response: $pong\n"; 2433 logmsg "DATA sockfilt for passive data channel failed\n"; 2434 logmsg "DATA sockfilt killed now\n"; 2435 killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data'); 2436 logmsg "DATA sockfilt not running\n"; 2437 datasockf_state('STOPPED'); 2438 sendcontrol "500 no free ports!\r\n"; 2439 return; 2440 } 2441 2442 logmsg "DATA sockfilt for passive data channel started (pid $slavepid)\n"; 2443 2444 # Find out on what port we listen on or have bound 2445 my $i; 2446 print DWRITE "PORT\n"; 2447 2448 # READ the response code 2449 sysread_or_die(\*DREAD, \$i, 5); 2450 2451 # READ the response size 2452 sysread_or_die(\*DREAD, \$i, 5); 2453 2454 my $size = 0; 2455 if($i =~ /^([0-9a-fA-F]{4})\n/) { 2456 $size = hex($1); 2457 } 2458 2459 # READ the response data 2460 read_datasockf(\$i, $size); 2461 2462 # The data is in the format 2463 # IPvX/NNN 2464 2465 if($i =~ /IPv(\d)\/(\d+)/) { 2466 # FIX: deal with IP protocol version 2467 $pasvport = $2; 2468 } 2469 2470 if(!$pasvport) { 2471 logmsg "DATA sockfilt unknown listener port\n"; 2472 logmsg "DATA sockfilt for passive data channel failed\n"; 2473 logmsg "DATA sockfilt killed now\n"; 2474 killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data'); 2475 logmsg "DATA sockfilt not running\n"; 2476 datasockf_state('STOPPED'); 2477 sendcontrol "500 no free ports!\r\n"; 2478 return; 2479 } 2480 2481 if($nodataconn) { 2482 my $str = nodataconn_str(); 2483 logmsg "DATA sockfilt for passive data channel ($str) bound on port ". 2484 "$pasvport\n"; 2485 } 2486 else { 2487 logmsg "DATA sockfilt for passive data channel listens on port ". 2488 "$pasvport\n"; 2489 } 2490 2491 if($cmd ne "EPSV") { 2492 # PASV reply 2493 my $p=$listenaddr; 2494 $p =~ s/\./,/g; 2495 if($pasvbadip) { 2496 $p="1,2,3,4"; 2497 } 2498 sendcontrol sprintf("227 Entering Passive Mode ($p,%d,%d)\n", 2499 int($pasvport/256), int($pasvport%256)); 2500 } 2501 else { 2502 # EPSV reply 2503 sendcontrol sprintf("229 Entering Passive Mode (|||%d|)\n", $pasvport); 2504 } 2505 2506 logmsg "Client has been notified that DATA conn ". 2507 "will be accepted on port $pasvport\n"; 2508 2509 if($nodataconn) { 2510 my $str = nodataconn_str(); 2511 logmsg "====> Client fooled ($str)\n"; 2512 return; 2513 } 2514 2515 eval { 2516 local $SIG{ALRM} = sub { die "alarm\n" }; 2517 2518 # assume swift operations unless explicitly slow 2519 alarm ($datadelay?20:10); 2520 2521 # Wait for 'CNCT' 2522 my $input; 2523 2524 # FIX: Monitor ctrl conn for disconnect 2525 2526 while(sysread(DREAD, $input, 5)) { 2527 2528 if($input !~ /^CNCT/) { 2529 # we wait for a connected client 2530 logmsg "Odd, we got $input from client\n"; 2531 next; 2532 } 2533 logmsg "Client connects to port $pasvport\n"; 2534 last; 2535 } 2536 alarm 0; 2537 }; 2538 if ($@) { 2539 # timed out 2540 logmsg "$srvrname server timed out awaiting data connection ". 2541 "on port $pasvport\n"; 2542 logmsg "accept failed or connection not even attempted\n"; 2543 logmsg "DATA sockfilt killed now\n"; 2544 killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data'); 2545 logmsg "DATA sockfilt not running\n"; 2546 datasockf_state('STOPPED'); 2547 return; 2548 } 2549 else { 2550 logmsg "====> Client established passive DATA connection ". 2551 "on port $pasvport\n"; 2552 } 2553 2554 return; 2555} 2556 2557# 2558# Support both PORT and EPRT here. 2559# 2560 2561sub PORT_ftp { 2562 my ($arg, $cmd) = @_; 2563 my $port; 2564 my $addr; 2565 2566 # kill previous data connection sockfilt when alive 2567 if($datasockf_runs eq 'yes') { 2568 killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data'); 2569 logmsg "DATA sockfilt for $datasockf_mode data channel killed\n"; 2570 } 2571 datasockf_state('STOPPED'); 2572 2573 logmsg "====> Active DATA channel requested by client\n"; 2574 2575 # We always ignore the given IP and use localhost. 2576 2577 if($cmd eq "PORT") { 2578 if($arg !~ /(\d+),(\d+),(\d+),(\d+),(\d+),(\d+)/) { 2579 logmsg "DATA sockfilt for active data channel not started ". 2580 "(bad PORT-line: $arg)\n"; 2581 sendcontrol "500 silly you, go away\r\n"; 2582 return; 2583 } 2584 $port = ($5<<8)+$6; 2585 $addr = "$1.$2.$3.$4"; 2586 } 2587 # EPRT |2|::1|49706| 2588 elsif($cmd eq "EPRT") { 2589 if($arg !~ /(\d+)\|([^\|]+)\|(\d+)/) { 2590 logmsg "DATA sockfilt for active data channel not started ". 2591 "(bad EPRT-line: $arg)\n"; 2592 sendcontrol "500 silly you, go away\r\n"; 2593 return; 2594 } 2595 sendcontrol "200 Thanks for dropping by. We contact you later\r\n"; 2596 $port = $3; 2597 $addr = $2; 2598 } 2599 else { 2600 logmsg "DATA sockfilt for active data channel not started ". 2601 "(invalid command: $cmd)\n"; 2602 sendcontrol "500 we don't like $cmd now\r\n"; 2603 return; 2604 } 2605 2606 if(!$port || $port > 65535) { 2607 logmsg "DATA sockfilt for active data channel not started ". 2608 "(illegal PORT number: $port)\n"; 2609 return; 2610 } 2611 2612 if($nodataconn) { 2613 my $str = nodataconn_str(); 2614 logmsg "DATA sockfilt for active data channel not started ($str)\n"; 2615 datasockf_state('ACTIVE_NODATACONN'); 2616 logmsg "====> Active DATA channel not established\n"; 2617 return; 2618 } 2619 2620 logmsg "DATA sockfilt for active data channel starting...\n"; 2621 2622 # We fire up a new sockfilt to do the data transfer for us. 2623 my $datasockfcmd = "./server/sockfilt " . 2624 "--ipv$ipvnum --connect $port --addr \"$addr\" " . 2625 "--pidfile \"$datasockf_pidfile\" " . 2626 "--logfile \"$datasockf_logfile\""; 2627 $slavepid = open2(\*DREAD, \*DWRITE, $datasockfcmd); 2628 2629 datasockf_state('ACTIVE'); 2630 2631 print STDERR "$datasockfcmd\n" if($verbose); 2632 2633 print DWRITE "PING\n"; 2634 my $pong; 2635 sysread_or_die(\*DREAD, \$pong, 5); 2636 2637 if($pong =~ /^FAIL/) { 2638 logmsg "DATA sockfilt said: FAIL\n"; 2639 logmsg "DATA sockfilt for active data channel failed\n"; 2640 logmsg "DATA sockfilt not running\n"; 2641 datasockf_state('STOPPED'); 2642 # client shall timeout awaiting connection from server 2643 return; 2644 } 2645 elsif($pong !~ /^PONG/) { 2646 logmsg "DATA sockfilt unexpected response: $pong\n"; 2647 logmsg "DATA sockfilt for active data channel failed\n"; 2648 logmsg "DATA sockfilt killed now\n"; 2649 killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data'); 2650 logmsg "DATA sockfilt not running\n"; 2651 datasockf_state('STOPPED'); 2652 # client shall timeout awaiting connection from server 2653 return; 2654 } 2655 2656 logmsg "DATA sockfilt for active data channel started (pid $slavepid)\n"; 2657 2658 logmsg "====> Active DATA channel connected to client port $port\n"; 2659 2660 return; 2661} 2662 2663#********************************************************************** 2664# datasockf_state is used to change variables that keep state info 2665# relative to the FTP secondary or data sockfilt process as soon as 2666# one of the five possible stable states is reached. Variables that 2667# are modified by this sub may be checked independently but should 2668# not be changed except by calling this sub. 2669# 2670sub datasockf_state { 2671 my $state = $_[0]; 2672 2673 if($state eq 'STOPPED') { 2674 # Data sockfilter initial state, not running, 2675 # not connected and not used. 2676 $datasockf_state = $state; 2677 $datasockf_mode = 'none'; 2678 $datasockf_runs = 'no'; 2679 $datasockf_conn = 'no'; 2680 } 2681 elsif($state eq 'PASSIVE') { 2682 # Data sockfilter accepted connection from client. 2683 $datasockf_state = $state; 2684 $datasockf_mode = 'passive'; 2685 $datasockf_runs = 'yes'; 2686 $datasockf_conn = 'yes'; 2687 } 2688 elsif($state eq 'ACTIVE') { 2689 # Data sockfilter has connected to client. 2690 $datasockf_state = $state; 2691 $datasockf_mode = 'active'; 2692 $datasockf_runs = 'yes'; 2693 $datasockf_conn = 'yes'; 2694 } 2695 elsif($state eq 'PASSIVE_NODATACONN') { 2696 # Data sockfilter bound port without listening, 2697 # client won't be able to establish data connection. 2698 $datasockf_state = $state; 2699 $datasockf_mode = 'passive'; 2700 $datasockf_runs = 'yes'; 2701 $datasockf_conn = 'no'; 2702 } 2703 elsif($state eq 'ACTIVE_NODATACONN') { 2704 # Data sockfilter does not even run, 2705 # client awaits data connection from server in vain. 2706 $datasockf_state = $state; 2707 $datasockf_mode = 'active'; 2708 $datasockf_runs = 'no'; 2709 $datasockf_conn = 'no'; 2710 } 2711 else { 2712 die "Internal error. Unknown datasockf state: $state!"; 2713 } 2714} 2715 2716#********************************************************************** 2717# nodataconn_str returns string of effective nodataconn command. Notice 2718# that $nodataconn may be set alone or in addition to a $nodataconnXXX. 2719# 2720sub nodataconn_str { 2721 my $str; 2722 # order matters 2723 $str = 'NODATACONN' if($nodataconn); 2724 $str = 'NODATACONN425' if($nodataconn425); 2725 $str = 'NODATACONN421' if($nodataconn421); 2726 $str = 'NODATACONN150' if($nodataconn150); 2727 return "$str"; 2728} 2729 2730#********************************************************************** 2731# customize configures test server operation for each curl test, reading 2732# configuration commands/parameters from server commands file each time 2733# a new client control connection is established with the test server. 2734# On success returns 1, otherwise zero. 2735# 2736sub customize { 2737 $ctrldelay = 0; # default is no throttling of the ctrl stream 2738 $datadelay = 0; # default is no throttling of the data stream 2739 $retrweirdo = 0; # default is no use of RETRWEIRDO 2740 $retrnosize = 0; # default is no use of RETRNOSIZE 2741 $pasvbadip = 0; # default is no use of PASVBADIP 2742 $nosave = 0; # default is to actually save uploaded data to file 2743 $nodataconn = 0; # default is to establish or accept data channel 2744 $nodataconn425 = 0; # default is to not send 425 without data channel 2745 $nodataconn421 = 0; # default is to not send 421 without data channel 2746 $nodataconn150 = 0; # default is to not send 150 without data channel 2747 @capabilities = (); # default is to not support capability commands 2748 @auth_mechs = (); # default is to not support authentication commands 2749 %fulltextreply = ();# 2750 %commandreply = (); # 2751 %customcount = (); # 2752 %delayreply = (); # 2753 2754 open(CUSTOM, "<log/ftpserver.cmd") || 2755 return 1; 2756 2757 logmsg "FTPD: Getting commands from log/ftpserver.cmd\n"; 2758 2759 while(<CUSTOM>) { 2760 if($_ =~ /REPLY \"([A-Z]+ [A-Za-z0-9+-\/=\*. ]+)\" (.*)/) { 2761 $fulltextreply{$1}=eval "qq{$2}"; 2762 logmsg "FTPD: set custom reply for $1\n"; 2763 } 2764 elsif($_ =~ /REPLY(LF|) ([A-Za-z0-9+\/=\*]*) (.*)/) { 2765 $commandreply{$2}=eval "qq{$3}"; 2766 if($1 ne "LF") { 2767 $commandreply{$2}.="\r\n"; 2768 } 2769 else { 2770 $commandreply{$2}.="\n"; 2771 } 2772 if($2 eq "") { 2773 logmsg "FTPD: set custom reply for empty command\n"; 2774 } 2775 else { 2776 logmsg "FTPD: set custom reply for $2 command\n"; 2777 } 2778 } 2779 elsif($_ =~ /COUNT ([A-Z]+) (.*)/) { 2780 # we blank the custom reply for this command when having 2781 # been used this number of times 2782 $customcount{$1}=$2; 2783 logmsg "FTPD: blank custom reply for $1 command after $2 uses\n"; 2784 } 2785 elsif($_ =~ /DELAY ([A-Z]+) (\d*)/) { 2786 $delayreply{$1}=$2; 2787 logmsg "FTPD: delay reply for $1 with $2 seconds\n"; 2788 } 2789 elsif($_ =~ /SLOWDOWN/) { 2790 $ctrldelay=1; 2791 $datadelay=1; 2792 logmsg "FTPD: send response with 0.01 sec delay between each byte\n"; 2793 } 2794 elsif($_ =~ /RETRWEIRDO/) { 2795 logmsg "FTPD: instructed to use RETRWEIRDO\n"; 2796 $retrweirdo=1; 2797 } 2798 elsif($_ =~ /RETRNOSIZE/) { 2799 logmsg "FTPD: instructed to use RETRNOSIZE\n"; 2800 $retrnosize=1; 2801 } 2802 elsif($_ =~ /PASVBADIP/) { 2803 logmsg "FTPD: instructed to use PASVBADIP\n"; 2804 $pasvbadip=1; 2805 } 2806 elsif($_ =~ /NODATACONN425/) { 2807 # applies to both active and passive FTP modes 2808 logmsg "FTPD: instructed to use NODATACONN425\n"; 2809 $nodataconn425=1; 2810 $nodataconn=1; 2811 } 2812 elsif($_ =~ /NODATACONN421/) { 2813 # applies to both active and passive FTP modes 2814 logmsg "FTPD: instructed to use NODATACONN421\n"; 2815 $nodataconn421=1; 2816 $nodataconn=1; 2817 } 2818 elsif($_ =~ /NODATACONN150/) { 2819 # applies to both active and passive FTP modes 2820 logmsg "FTPD: instructed to use NODATACONN150\n"; 2821 $nodataconn150=1; 2822 $nodataconn=1; 2823 } 2824 elsif($_ =~ /NODATACONN/) { 2825 # applies to both active and passive FTP modes 2826 logmsg "FTPD: instructed to use NODATACONN\n"; 2827 $nodataconn=1; 2828 } 2829 elsif($_ =~ /CAPA (.*)/) { 2830 logmsg "FTPD: instructed to support CAPABILITY command\n"; 2831 @capabilities = split(/ (?!(?:[^" ]|[^"] [^"])+")/, $1); 2832 foreach (@capabilities) { 2833 $_ = $1 if /^"(.*)"$/; 2834 } 2835 } 2836 elsif($_ =~ /AUTH (.*)/) { 2837 logmsg "FTPD: instructed to support AUTHENTICATION command\n"; 2838 @auth_mechs = split(/ /, $1); 2839 } 2840 elsif($_ =~ /NOSAVE/) { 2841 # don't actually store the file we upload - to be used when 2842 # uploading insanely huge amounts 2843 $nosave = 1; 2844 logmsg "FTPD: NOSAVE prevents saving of uploaded data\n"; 2845 } 2846 } 2847 close(CUSTOM); 2848} 2849 2850#---------------------------------------------------------------------- 2851#---------------------------------------------------------------------- 2852#--------------------------- END OF SUBS ---------------------------- 2853#---------------------------------------------------------------------- 2854#---------------------------------------------------------------------- 2855 2856#********************************************************************** 2857# Parse command line options 2858# 2859# Options: 2860# 2861# --verbose # verbose 2862# --srcdir # source directory 2863# --id # server instance number 2864# --proto # server protocol 2865# --pidfile # server pid file 2866# --logfile # server log file 2867# --ipv4 # server IP version 4 2868# --ipv6 # server IP version 6 2869# --port # server listener port 2870# --addr # server address for listener port binding 2871# 2872while(@ARGV) { 2873 if($ARGV[0] eq '--verbose') { 2874 $verbose = 1; 2875 } 2876 elsif($ARGV[0] eq '--srcdir') { 2877 if($ARGV[1]) { 2878 $srcdir = $ARGV[1]; 2879 shift @ARGV; 2880 } 2881 } 2882 elsif($ARGV[0] eq '--id') { 2883 if($ARGV[1] && ($ARGV[1] =~ /^(\d+)$/)) { 2884 $idnum = $1 if($1 > 0); 2885 shift @ARGV; 2886 } 2887 } 2888 elsif($ARGV[0] eq '--proto') { 2889 if($ARGV[1] && ($ARGV[1] =~ /^(ftp|imap|pop3|smtp)$/)) { 2890 $proto = $1; 2891 shift @ARGV; 2892 } 2893 else { 2894 die "unsupported protocol $ARGV[1]"; 2895 } 2896 } 2897 elsif($ARGV[0] eq '--pidfile') { 2898 if($ARGV[1]) { 2899 $pidfile = $ARGV[1]; 2900 shift @ARGV; 2901 } 2902 } 2903 elsif($ARGV[0] eq '--logfile') { 2904 if($ARGV[1]) { 2905 $logfile = $ARGV[1]; 2906 shift @ARGV; 2907 } 2908 } 2909 elsif($ARGV[0] eq '--ipv4') { 2910 $ipvnum = 4; 2911 $listenaddr = '127.0.0.1' if($listenaddr eq '::1'); 2912 } 2913 elsif($ARGV[0] eq '--ipv6') { 2914 $ipvnum = 6; 2915 $listenaddr = '::1' if($listenaddr eq '127.0.0.1'); 2916 } 2917 elsif($ARGV[0] eq '--port') { 2918 if($ARGV[1] && ($ARGV[1] =~ /^(\d+)$/)) { 2919 $port = $1 if($1 > 1024); 2920 shift @ARGV; 2921 } 2922 } 2923 elsif($ARGV[0] eq '--addr') { 2924 if($ARGV[1]) { 2925 my $tmpstr = $ARGV[1]; 2926 if($tmpstr =~ /^(\d\d?\d?)\.(\d\d?\d?)\.(\d\d?\d?)\.(\d\d?\d?)$/) { 2927 $listenaddr = "$1.$2.$3.$4" if($ipvnum == 4); 2928 } 2929 elsif($ipvnum == 6) { 2930 $listenaddr = $tmpstr; 2931 $listenaddr =~ s/^\[(.*)\]$/$1/; 2932 } 2933 shift @ARGV; 2934 } 2935 } 2936 else { 2937 print STDERR "\nWarning: ftpserver.pl unknown parameter: $ARGV[0]\n"; 2938 } 2939 shift @ARGV; 2940} 2941 2942#*************************************************************************** 2943# Initialize command line option dependent variables 2944# 2945 2946if(!$srcdir) { 2947 $srcdir = $ENV{'srcdir'} || '.'; 2948} 2949if(!$pidfile) { 2950 $pidfile = "$path/". server_pidfilename($proto, $ipvnum, $idnum); 2951} 2952if(!$logfile) { 2953 $logfile = server_logfilename($logdir, $proto, $ipvnum, $idnum); 2954} 2955 2956$mainsockf_pidfile = "$path/". 2957 mainsockf_pidfilename($proto, $ipvnum, $idnum); 2958$mainsockf_logfile = 2959 mainsockf_logfilename($logdir, $proto, $ipvnum, $idnum); 2960 2961if($proto eq 'ftp') { 2962 $datasockf_pidfile = "$path/". 2963 datasockf_pidfilename($proto, $ipvnum, $idnum); 2964 $datasockf_logfile = 2965 datasockf_logfilename($logdir, $proto, $ipvnum, $idnum); 2966} 2967 2968$srvrname = servername_str($proto, $ipvnum, $idnum); 2969 2970$idstr = "$idnum" if($idnum > 1); 2971 2972protocolsetup($proto); 2973 2974$SIG{INT} = \&exit_signal_handler; 2975$SIG{TERM} = \&exit_signal_handler; 2976 2977startsf(); 2978 2979logmsg sprintf("%s server listens on port IPv${ipvnum}/${port}\n", uc($proto)); 2980 2981open(PID, ">$pidfile"); 2982print PID $$."\n"; 2983close(PID); 2984 2985logmsg("logged pid $$ in $pidfile\n"); 2986 2987 2988while(1) { 2989 2990 # kill previous data connection sockfilt when alive 2991 if($datasockf_runs eq 'yes') { 2992 killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data'); 2993 logmsg "DATA sockfilt for $datasockf_mode data channel killed now\n"; 2994 } 2995 datasockf_state('STOPPED'); 2996 2997 # 2998 # We read 'sockfilt' commands. 2999 # 3000 my $input; 3001 3002 logmsg "Awaiting input\n"; 3003 sysread_or_die(\*SFREAD, \$input, 5); 3004 3005 if($input !~ /^CNCT/) { 3006 # we wait for a connected client 3007 logmsg "MAIN sockfilt said: $input"; 3008 next; 3009 } 3010 logmsg "====> Client connect\n"; 3011 3012 set_advisor_read_lock($SERVERLOGS_LOCK); 3013 $serverlogslocked = 1; 3014 3015 # flush data: 3016 $| = 1; 3017 3018 &customize(); # read test control instructions 3019 3020 my $welcome = $commandreply{"welcome"}; 3021 if(!$welcome) { 3022 $welcome = $displaytext{"welcome"}; 3023 } 3024 else { 3025 # clear it after use 3026 $commandreply{"welcome"}=""; 3027 if($welcome !~ /\r\n\z/) { 3028 $welcome .= "\r\n"; 3029 } 3030 } 3031 sendcontrol $welcome; 3032 3033 #remove global variables from last connection 3034 if($ftplistparserstate) { 3035 undef $ftplistparserstate; 3036 } 3037 if($ftptargetdir) { 3038 $ftptargetdir = ""; 3039 } 3040 3041 if($verbose) { 3042 print STDERR "OUT: $welcome"; 3043 } 3044 3045 my $full = ""; 3046 3047 while(1) { 3048 my $i; 3049 3050 # Now we expect to read DATA\n[hex size]\n[prot], where the [prot] 3051 # part only is FTP lingo. 3052 3053 # COMMAND 3054 sysread_or_die(\*SFREAD, \$i, 5); 3055 3056 if($i !~ /^DATA/) { 3057 logmsg "MAIN sockfilt said $i"; 3058 if($i =~ /^DISC/) { 3059 # disconnect 3060 last; 3061 } 3062 next; 3063 } 3064 3065 # SIZE of data 3066 sysread_or_die(\*SFREAD, \$i, 5); 3067 3068 my $size = 0; 3069 if($i =~ /^([0-9a-fA-F]{4})\n/) { 3070 $size = hex($1); 3071 } 3072 3073 # data 3074 read_mainsockf(\$input, $size); 3075 3076 ftpmsg $input; 3077 3078 $full .= $input; 3079 3080 # Loop until command completion 3081 next unless($full =~ /\r\n$/); 3082 3083 # Remove trailing CRLF. 3084 $full =~ s/[\n\r]+$//; 3085 3086 my $FTPCMD; 3087 my $FTPARG; 3088 if($proto eq "imap") { 3089 # IMAP is different with its identifier first on the command line 3090 if(($full =~ /^([^ ]+) ([^ ]+) (.*)/) || 3091 ($full =~ /^([^ ]+) ([^ ]+)/)) { 3092 $cmdid=$1; # set the global variable 3093 $FTPCMD=$2; 3094 $FTPARG=$3; 3095 } 3096 # IMAP authentication cancellation 3097 elsif($full =~ /^\*$/) { 3098 # Command id has already been set 3099 $FTPCMD="*"; 3100 $FTPARG=""; 3101 } 3102 # IMAP long "commands" are base64 authentication data 3103 elsif($full =~ /^[A-Z0-9+\/]*={0,2}$/i) { 3104 # Command id has already been set 3105 $FTPCMD=$full; 3106 $FTPARG=""; 3107 } 3108 else { 3109 sendcontrol "$full BAD Command\r\n"; 3110 last; 3111 } 3112 } 3113 elsif($full =~ /^([A-Z]{3,4})(\s(.*))?$/i) { 3114 $FTPCMD=$1; 3115 $FTPARG=$3; 3116 } 3117 elsif($proto eq "pop3") { 3118 # POP3 authentication cancellation 3119 if($full =~ /^\*$/) { 3120 $FTPCMD="*"; 3121 $FTPARG=""; 3122 } 3123 # POP3 long "commands" are base64 authentication data 3124 elsif($full =~ /^[A-Z0-9+\/]*={0,2}$/i) { 3125 $FTPCMD=$full; 3126 $FTPARG=""; 3127 } 3128 else { 3129 sendcontrol "-ERR Unrecognized command\r\n"; 3130 last; 3131 } 3132 } 3133 elsif($proto eq "smtp") { 3134 # SMTP authentication cancellation 3135 if($full =~ /^\*$/) { 3136 $FTPCMD="*"; 3137 $FTPARG=""; 3138 } 3139 # SMTP long "commands" are base64 authentication data 3140 elsif($full =~ /^[A-Z0-9+\/]{0,512}={0,2}$/i) { 3141 $FTPCMD=$full; 3142 $FTPARG=""; 3143 } 3144 else { 3145 sendcontrol "500 Unrecognized command\r\n"; 3146 last; 3147 } 3148 } 3149 else { 3150 sendcontrol "500 Unrecognized command\r\n"; 3151 last; 3152 } 3153 3154 logmsg "< \"$full\"\n"; 3155 3156 if($verbose) { 3157 print STDERR "IN: $full\n"; 3158 } 3159 3160 $full = ""; 3161 3162 my $delay = $delayreply{$FTPCMD}; 3163 if($delay) { 3164 # just go sleep this many seconds! 3165 logmsg("Sleep for $delay seconds\n"); 3166 my $twentieths = $delay * 20; 3167 while($twentieths--) { 3168 select(undef, undef, undef, 0.05) unless($got_exit_signal); 3169 } 3170 } 3171 3172 my $check = 1; # no response yet 3173 3174 # See if there is a custom reply for the full text 3175 my $fulltext = $FTPARG ? $FTPCMD . " " . $FTPARG : $FTPCMD; 3176 my $text = $fulltextreply{$fulltext}; 3177 if($text && ($text ne "")) { 3178 sendcontrol "$text\r\n"; 3179 $check = 0; 3180 } 3181 else { 3182 # See if there is a custom reply for the command 3183 $text = $commandreply{$FTPCMD}; 3184 if($text && ($text ne "")) { 3185 if($customcount{$FTPCMD} && (!--$customcount{$FTPCMD})) { 3186 # used enough times so blank the custom command reply 3187 $commandreply{$FTPCMD}=""; 3188 } 3189 3190 sendcontrol $text; 3191 $check = 0; 3192 } 3193 else { 3194 # See if there is any display text for the command 3195 $text = $displaytext{$FTPCMD}; 3196 if($text && ($text ne "")) { 3197 if($proto eq 'imap') { 3198 sendcontrol "$cmdid $text\r\n"; 3199 } 3200 else { 3201 sendcontrol "$text\r\n"; 3202 } 3203 3204 $check = 0; 3205 } 3206 3207 # only perform this if we're not faking a reply 3208 my $func = $commandfunc{uc($FTPCMD)}; 3209 if($func) { 3210 &$func($FTPARG, $FTPCMD); 3211 $check = 0; 3212 } 3213 } 3214 } 3215 3216 if($check) { 3217 logmsg "$FTPCMD wasn't handled!\n"; 3218 if($proto eq 'pop3') { 3219 sendcontrol "-ERR $FTPCMD is not dealt with!\r\n"; 3220 } 3221 elsif($proto eq 'imap') { 3222 sendcontrol "$cmdid BAD $FTPCMD is not dealt with!\r\n"; 3223 } 3224 else { 3225 sendcontrol "500 $FTPCMD is not dealt with!\r\n"; 3226 } 3227 } 3228 3229 } # while(1) 3230 logmsg "====> Client disconnected\n"; 3231 3232 if($serverlogslocked) { 3233 $serverlogslocked = 0; 3234 clear_advisor_read_lock($SERVERLOGS_LOCK); 3235 } 3236} 3237 3238killsockfilters($proto, $ipvnum, $idnum, $verbose); 3239unlink($pidfile); 3240if($serverlogslocked) { 3241 $serverlogslocked = 0; 3242 clear_advisor_read_lock($SERVERLOGS_LOCK); 3243} 3244 3245exit; 3246