BEGIN {
@INC=(@INC, $ENV{'srcdir'}, '.');
eval {
no warnings "all";
require Time::HiRes;
import Time::HiRes qw( gettimeofday );
}
}
use strict;
use warnings;
use IPC::Open2;
require "getpart.pm";
require "ftp.pm";
require "directories.pm";
use serverhelp qw(
servername_str
server_pidfilename
server_logfilename
mainsockf_pidfilename
mainsockf_logfilename
datasockf_pidfilename
datasockf_logfilename
);
my $verbose = 0; my $idstr = ""; my $idnum = 1; my $ipvnum = 4; my $proto = 'ftp'; my $srcdir; my $srvrname; my $grok_eprt;
my $path = '.';
my $logdir = $path .'/log';
my $port = 8921; my $listenaddr = '127.0.0.1';
my $pidfile; my $logfile; my $mainsockf_pidfile; my $mainsockf_logfile; my $datasockf_pidfile; my $datasockf_logfile;
my $SERVERLOGS_LOCK = 'log/serverlogs.lock';
my $serverlogslocked = 0;
my $sfpid; my $slavepid;
local *SFREAD; local *SFWRITE; local *DREAD; local *DWRITE;
my %commandfunc; my %displaytext; my @welcome;
my $ctrldelay; my $datadelay; my $retrweirdo; my $retrnosize; my $pasvbadip; my $nosave; my %customreply; my %customcount; my %delayreply;
my $ftplistparserstate;
my $ftptargetdir;
my $got_exit_signal = 0; my $exit_signal;
sub exit_signal_handler {
my $signame = shift;
killsockfilters($proto, $ipvnum, $idnum, $verbose);
unlink($pidfile);
if($serverlogslocked) {
$serverlogslocked = 0;
clear_advisor_read_lock($SERVERLOGS_LOCK);
}
exit;
}
sub logmsg {
my $now;
if($Time::HiRes::VERSION) {
my ($seconds, $usec) = gettimeofday();
my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) =
localtime($seconds);
$now = sprintf("%02d:%02d:%02d.%06d ", $hour, $min, $sec, $usec);
}
else {
my $seconds = time();
my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) =
localtime($seconds);
$now = sprintf("%02d:%02d:%02d ", $hour, $min, $sec);
}
if(open(LOGFILEFH, ">>$logfile")) {
print LOGFILEFH $now;
print LOGFILEFH @_;
close(LOGFILEFH);
}
}
sub ftpmsg {
open(INPUT, ">>log/server$idstr.input") ||
logmsg "failed to open log/server$idstr.input\n";
print INPUT @_;
close(INPUT);
}
sub sysread_or_die {
my $FH = shift;
my $scalar = shift;
my $length = shift;
my $fcaller;
my $lcaller;
my $result;
$result = sysread($$FH, $$scalar, $length);
if(not defined $result) {
($fcaller, $lcaller) = (caller)[1,2];
logmsg "Failed to read input\n";
logmsg "Error: $srvrname server, sysread error: $!\n";
logmsg "Exited from sysread_or_die() at $fcaller " .
"line $lcaller. $srvrname server, sysread error: $!\n";
killsockfilters($proto, $ipvnum, $idnum, $verbose);
unlink($pidfile);
if($serverlogslocked) {
$serverlogslocked = 0;
clear_advisor_read_lock($SERVERLOGS_LOCK);
}
exit;
}
elsif($result == 0) {
($fcaller, $lcaller) = (caller)[1,2];
logmsg "Failed to read input\n";
logmsg "Error: $srvrname server, read zero\n";
logmsg "Exited from sysread_or_die() at $fcaller " .
"line $lcaller. $srvrname server, read zero\n";
killsockfilters($proto, $ipvnum, $idnum, $verbose);
unlink($pidfile);
if($serverlogslocked) {
$serverlogslocked = 0;
clear_advisor_read_lock($SERVERLOGS_LOCK);
}
exit;
}
return $result;
}
sub startsf {
my $mainsockfcmd = "./server/sockfilt " .
"--ipv$ipvnum --port $port " .
"--pidfile \"$mainsockf_pidfile\" " .
"--logfile \"$mainsockf_logfile\"";
$sfpid = open2(*SFREAD, *SFWRITE, $mainsockfcmd);
print STDERR "$mainsockfcmd\n" if($verbose);
print SFWRITE "PING\n";
my $pong;
sysread_or_die(\*SFREAD, \$pong, 5);
if($pong !~ /^PONG/) {
logmsg "Failed sockfilt command: $mainsockfcmd\n";
killsockfilters($proto, $ipvnum, $idnum, $verbose);
unlink($pidfile);
if($serverlogslocked) {
$serverlogslocked = 0;
clear_advisor_read_lock($SERVERLOGS_LOCK);
}
die "Failed to start sockfilt!";
}
}
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 $l;
}
}
sub sendcontrol {
if(!$ctrldelay) {
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";
}
}
sub senddata {
my $l;
foreach $l (@_) {
if(!$datadelay) {
sockfiltsecondary $l;
}
else {
for (split(//,$l)) {
sockfiltsecondary $_;
select(undef, undef, undef, 0.01);
}
}
}
}
sub protocolsetup {
my $proto = $_[0];
if($proto eq 'ftp') {
%commandfunc = (
'PORT' => \&PORT_ftp,
'EPRT' => \&PORT_ftp,
'LIST' => \&LIST_ftp,
'NLST' => \&NLST_ftp,
'PASV' => \&PASV_ftp,
'CWD' => \&CWD_ftp,
'PWD' => \&PWD_ftp,
'EPSV' => \&PASV_ftp,
'RETR' => \&RETR_ftp,
'SIZE' => \&SIZE_ftp,
'REST' => \&REST_ftp,
'STOR' => \&STOR_ftp,
'APPE' => \&STOR_ftp, 'MDTM' => \&MDTM_ftp,
);
%displaytext = (
'USER' => '331 We are happy you popped in!',
'PASS' => '230 Welcome you silly person',
'PORT' => '200 You said PORT - I say FINE',
'TYPE' => '200 I modify TYPE as you wanted',
'LIST' => '150 here comes a directory',
'NLST' => '150 here comes a directory',
'CWD' => '250 CWD command successful.',
'SYST' => '215 UNIX Type: L8', 'QUIT' => '221 bye bye baby', 'MKD' => '257 Created your requested directory',
'REST' => '350 Yeah yeah we set it there for you',
'DELE' => '200 OK OK OK whatever you say',
'RNFR' => '350 Received your order. Please provide more',
'RNTO' => '250 Ok, thanks. File renaming completed.',
'NOOP' => '200 Yes, I\'m very good at doing nothing.',
'PBSZ' => '500 PBSZ not implemented',
'PROT' => '500 PROT not implemented',
);
@welcome = (
'220- _ _ ____ _ '."\r\n",
'220- ___| | | | _ \| | '."\r\n",
'220- / __| | | | |_) | | '."\r\n",
'220- | (__| |_| | _ <| |___ '."\r\n",
'220 \___|\___/|_| \_\_____|'."\r\n"
);
}
elsif($proto eq 'pop3') {
%commandfunc = (
'RETR' => \&RETR_pop3,
);
%displaytext = (
'USER' => '+OK We are happy you popped in!',
'PASS' => '+OK Access granted',
'QUIT' => '+OK byebye',
);
@welcome = (
' _ _ ____ _ '."\r\n",
' ___| | | | _ \| | '."\r\n",
' / __| | | | |_) | | '."\r\n",
' | (__| |_| | _ <| |___ '."\r\n",
' \___|\___/|_| \_\_____|'."\r\n",
'+OK cURL POP3 server ready to serve'."\r\n"
);
}
elsif($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',
);
@welcome = (
' _ _ ____ _ '."\r\n",
' ___| | | | _ \| | '."\r\n",
' / __| | | | |_) | | '."\r\n",
' | (__| |_| | _ <| |___ '."\r\n",
' \___|\___/|_| \_\_____|'."\r\n",
'* OK cURL IMAP server ready to serve'."\r\n"
);
}
elsif($proto eq 'smtp') {
%commandfunc = (
'DATA' => \&DATA_smtp,
'RCPT' => \&RCPT_smtp,
);
%displaytext = (
'EHLO' => '230 We are happy you popped in!',
'MAIL' => '200 Note taken',
'RCPT' => '200 Receivers accepted',
'QUIT' => '200 byebye',
);
@welcome = (
'220- _ _ ____ _ '."\r\n",
'220- ___| | | | _ \| | '."\r\n",
'220- / __| | | | |_) | | '."\r\n",
'220- | (__| |_| | _ <| |___ '."\r\n",
'220 \___|\___/|_| \_\_____|'."\r\n"
);
}
}
sub close_dataconn {
my ($closed)=@_;
my $datapid = processexists($datasockf_pidfile);
if(!$closed) {
logmsg "* disconnect data connection\n";
if($datapid > 0) {
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 $datapid)\n";
if($datapid > 0) {
print DWRITE "QUIT\n";
waitpid($datapid, 0);
unlink($datasockf_pidfile) if(-f $datasockf_pidfile);
}
}
my $smtp_rcpt;
sub DATA_smtp {
my $testno;
if($smtp_rcpt =~ /^TO:(.*)/) {
$testno = $1;
}
else {
return; }
if($testno eq "<verifiedserver>") {
sendcontrol "554 WE ROOLZ: $$\r\n";
return 0; }
else {
$testno =~ s/^([^0-9]*)([0-9]+).*/$2/;
sendcontrol "354 Show me the mail\r\n";
}
logmsg "===> rcpt $testno was $smtp_rcpt\n";
my $filename = "log/upload.$testno";
logmsg "Store test number $testno in $filename\n";
open(FILE, ">$filename") ||
return 0;
my $line;
my $ulsize=0;
my $disc=0;
my $raw;
while (5 == (sysread \*SFREAD, $line, 5)) {
if($line eq "DATA\n") {
my $i;
my $eob;
sysread \*SFREAD, $i, 5;
my $size = 0;
if($i =~ /^([0-9a-fA-F]{4})\n/) {
$size = hex($1);
}
sysread \*SFREAD, $line, $size;
$ulsize += $size;
print FILE $line if(!$nosave);
$raw .= $line;
if($raw =~ /\x0d\x0a\x2e\x0d\x0a/) {
$eob = 1;
}
logmsg "> Appending $size bytes to file\n";
if($eob) {
logmsg "Found SMTP EOB marker\n";
last;
}
}
elsif($line eq "DISC\n") {
$disc=1;
last;
}
else {
logmsg "No support for: $line";
last;
}
}
if($nosave) {
print FILE "$ulsize bytes would've been stored here\n";
}
close(FILE);
sendcontrol "250 OK, data received!\r\n";
logmsg "received $ulsize bytes upload\n";
}
sub RCPT_smtp {
my ($args) = @_;
$smtp_rcpt = $args;
}
my $cmdid;
my $selected;
sub SELECT_imap {
my ($testno) = @_;
my @data;
my $size;
logmsg "SELECT_imap got test $testno\n";
$selected = $testno;
return 0;
}
sub FETCH_imap {
my ($testno) = @_;
my @data;
my $size;
logmsg "FETCH_imap got test $testno\n";
$testno = $selected;
if($testno =~ /^verifiedserver$/) {
my $response = "WE ROOLZ: $$\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);
}
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;
}
sub RETR_pop3 {
my ($testno) = @_;
my @data;
if($testno =~ /^verifiedserver$/) {
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);
}
loadtest("$srcdir/data/test$testno");
@data = getpart("reply", "data$testpart");
}
sendcontrol "+OK Mail transfer starts\r\n";
for my $d (@data) {
sendcontrol $d;
}
sendcontrol "\r\n.\r\n";
return 0;
}
my $rest=0;
sub REST_ftp {
$rest = $_[0];
logmsg "Set REST position to $rest\n"
}
sub switch_directory_goto {
my $target_dir = $_;
if(!$ftptargetdir) {
$ftptargetdir = "/";
}
if($target_dir eq "") {
$ftptargetdir = "/";
}
elsif($target_dir eq "..") {
if($ftptargetdir eq "/") {
$ftptargetdir = "/";
}
else {
$ftptargetdir =~ s/[[:alnum:]]+\/$//;
}
}
else {
$ftptargetdir .= $target_dir . "/";
}
}
sub switch_directory {
my $target_dir = $_[0];
if($target_dir eq "/") {
$ftptargetdir = "/";
}
else {
my @dirs = split("/", $target_dir);
for(@dirs) {
switch_directory_goto($_);
}
}
}
sub CWD_ftp {
my ($folder, $fullcommand) = $_[0];
switch_directory($folder);
if($ftptargetdir =~ /^\/fully_simulated/) {
$ftplistparserstate = "enabled";
}
else {
undef $ftplistparserstate;
}
}
sub PWD_ftp {
my $mydir;
$mydir = $ftptargetdir ? $ftptargetdir : "/";
if($mydir ne "/") {
$mydir =~ s/\/$//;
}
sendcontrol "257 \"$mydir\" is current directory\r\n";
}
sub LIST_ftp {
my @ftpdir=("total 20\r\n",
"drwxr-xr-x 8 98 98 512 Oct 22 13:06 .\r\n",
"drwxr-xr-x 8 98 98 512 Oct 22 13:06 ..\r\n",
"drwxr-xr-x 2 98 98 512 May 2 1996 .NeXT\r\n",
"-r--r--r-- 1 0 1 35 Jul 16 1996 README\r\n",
"lrwxrwxrwx 1 0 1 7 Dec 9 1999 bin -> usr/bin\r\n",
"dr-xr-xr-x 2 0 1 512 Oct 1 1997 dev\r\n",
"drwxrwxrwx 2 98 98 512 May 29 16:04 download.html\r\n",
"dr-xr-xr-x 2 0 1 512 Nov 30 1995 etc\r\n",
"drwxrwxrwx 2 98 1 512 Oct 30 14:33 pub\r\n",
"dr-xr-xr-x 5 0 1 512 Oct 1 1997 usr\r\n");
if($ftplistparserstate) {
@ftpdir = ftp_contentlist($ftptargetdir);
}
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($ftplistparserstate) {
my $size = wildcard_filesize($ftptargetdir, $testno);
if($size == -1) {
sendcontrol "550 $testno: No such file or directory.\r\n";
}
else {
sendcontrol "213 $size\r\n";
}
return 0;
}
if($testno =~ /^verifiedserver$/) {
my $response = "WE ROOLZ: $$\r\n";
my $size = length($response);
sendcontrol "213 $size\r\n";
return 0;
}
if($testno =~ /(\d+)\/?$/) {
$testno = $1;
}
else {
print STDERR "SIZE_ftp: invalid test number: $testno\n";
return 1;
}
my $testpart = "";
if($testno > 10000) {
$testpart = $testno % 10000;
$testno = int($testno / 10000);
}
loadtest("$srcdir/data/test$testno");
my @data = getpart("reply", "size");
my $size = $data[0];
if($size) {
if($size > -1) {
sendcontrol "213 $size\r\n";
}
else {
sendcontrol "550 $testno: No such file or directory.\r\n";
}
}
else {
$size=0;
@data = getpart("reply", "data$testpart");
for(@data) {
$size += length($_);
}
if($size) {
sendcontrol "213 $size\r\n";
}
else {
sendcontrol "550 $testno: No such file or directory.\r\n";
}
}
return 0;
}
sub RETR_ftp {
my ($testno) = @_;
if($ftplistparserstate) {
my @content = wildcard_getfile($ftptargetdir, $testno);
if($content[0] == -1) {
}
else {
my $size = length $content[1];
sendcontrol "150 Binary data connection for $testno ($size bytes).\r\n",
senddata $content[1];
close_dataconn(0);
sendcontrol "226 File transfer complete\r\n";
}
return 0;
}
if($testno =~ /^verifiedserver$/) {
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) {
$size -= $rest;
logmsg "REST $rest was removed from size, makes $size left\n";
$rest = 0; }
if($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; }
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;
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;
$ulsize += $size;
print FILE $line if(!$nosave);
logmsg "> Appending $size bytes to file\n";
}
elsif($line eq "DISC\n") {
$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 $pasvport;
killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data');
my $datasockfcmd = "./server/sockfilt " .
"--ipv$ipvnum --port 0 " .
"--pidfile \"$datasockf_pidfile\" " .
"--logfile \"$datasockf_logfile\"";
$slavepid = open2(\*DREAD, \*DWRITE, $datasockfcmd);
print DWRITE "PING\n";
my $pong;
sysread_or_die(\*DREAD, \$pong, 5);
if($pong !~ /^PONG/) {
logmsg "failed to run sockfilt for data connection\n";
killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data');
sendcontrol "500 no free ports!\r\n";
return 0;
}
logmsg "Run sockfilt for data on pid $slavepid\n";
my $i;
print DWRITE "PORT\n";
sysread_or_die(\*DREAD, \$i, 5);
sysread_or_die(\*DREAD, \$i, 5);
my $size = 0;
if($i =~ /^([0-9a-fA-F]{4})\n/) {
$size = hex($1);
}
sysread_or_die(\*DREAD, \$i, $size);
if($i =~ /IPv(\d)\/(\d+)/) {
$pasvport = $2;
}
if($cmd ne "EPSV") {
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 {
sendcontrol sprintf("229 Entering Passive Mode (|||%d|)\n", $pasvport);
}
eval {
local $SIG{ALRM} = sub { die "alarm\n" };
alarm ($datadelay?20:10);
my $input;
while(sysread(DREAD, $input, 5)) {
if($input !~ /^CNCT/) {
logmsg "Odd, we got $input from client\n";
next;
}
logmsg "====> Client DATA connect\n";
last;
}
alarm 0;
};
if ($@) {
logmsg "$srvrname server timed out awaiting data connection ".
"on port $pasvport\n";
logmsg "accept failed or connection not even attempted\n";
killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data');
return;
}
else {
logmsg "data connection setup on port $pasvport\n";
}
return;
}
sub PORT_ftp {
my ($arg, $cmd) = @_;
my $port;
my $addr;
if($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.$4";
}
elsif(($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;
}
my $datasockfcmd = "./server/sockfilt " .
"--ipv$ipvnum --connect $port --addr \"$addr\" " .
"--pidfile \"$datasockf_pidfile\" " .
"--logfile \"$datasockf_logfile\"";
$slavepid = open2(\*DREAD, \*DWRITE, $datasockfcmd);
print STDERR "$datasockfcmd\n" if($verbose);
print DWRITE "PING\n";
my $pong;
sysread_or_die(\*DREAD, \$pong, 5);
if($pong !~ /^PONG/) {
logmsg "Failed sockfilt for data connection\n";
killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data');
}
logmsg "====> Client DATA connect to port $port\n";
return;
}
sub customize {
$ctrldelay = 0; $datadelay = 0; $retrweirdo = 0; $retrnosize = 0; $pasvbadip = 0; $nosave = 0; %customreply = (); %customcount = (); %delayreply = ();
open(CUSTOM, "<log/ftpserver.cmd") ||
return 1;
logmsg "FTPD: Getting commands from log/ftpserver.cmd\n";
while(<CUSTOM>) {
if($_ =~ /REPLY ([A-Za-z0-9+\/=]+) (.*)/) {
$customreply{$1}=eval "qq{$2}";
logmsg "FTPD: set custom reply for $1\n";
}
if($_ =~ /COUNT ([A-Z]+) (.*)/) {
$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/) {
$ctrldelay=1;
$datadelay=1;
logmsg "FTPD: send response with 0.01 sec delay between each byte\n";
}
elsif($_ =~ /RETRWEIRDO/) {
logmsg "FTPD: instructed to use RETRWEIRDO\n";
$retrweirdo=1;
}
elsif($_ =~ /RETRNOSIZE/) {
logmsg "FTPD: instructed to use RETRNOSIZE\n";
$retrnosize=1;
}
elsif($_ =~ /PASVBADIP/) {
logmsg "FTPD: instructed to use PASVBADIP\n";
$pasvbadip=1;
}
elsif($_ =~ /NOSAVE/) {
$nosave = 1;
logmsg "FTPD: NOSAVE prevents saving of uploaded data\n";
}
}
close(CUSTOM);
}
while(@ARGV) {
if($ARGV[0] eq '--verbose') {
$verbose = 1;
}
elsif($ARGV[0] eq '--srcdir') {
if($ARGV[1]) {
$srcdir = $ARGV[1];
shift @ARGV;
}
}
elsif($ARGV[0] eq '--id') {
if($ARGV[1] && ($ARGV[1] =~ /^(\d+)$/)) {
$idnum = $1 if($1 > 0);
shift @ARGV;
}
}
elsif($ARGV[0] eq '--proto') {
if($ARGV[1] && ($ARGV[1] =~ /^(ftp|imap|pop3|smtp)$/)) {
$proto = $1;
shift @ARGV;
}
else {
die "unsupported protocol $ARGV[1]";
}
}
elsif($ARGV[0] eq '--pidfile') {
if($ARGV[1]) {
$pidfile = $ARGV[1];
shift @ARGV;
}
}
elsif($ARGV[0] eq '--logfile') {
if($ARGV[1]) {
$logfile = $ARGV[1];
shift @ARGV;
}
}
elsif($ARGV[0] eq '--ipv4') {
$ipvnum = 4;
$listenaddr = '127.0.0.1' if($listenaddr eq '::1');
$grok_eprt = 0;
}
elsif($ARGV[0] eq '--ipv6') {
$ipvnum = 6;
$listenaddr = '::1' if($listenaddr eq '127.0.0.1');
$grok_eprt = 1;
}
elsif($ARGV[0] eq '--port') {
if($ARGV[1] && ($ARGV[1] =~ /^(\d+)$/)) {
$port = $1 if($1 > 1024);
shift @ARGV;
}
}
elsif($ARGV[0] eq '--addr') {
if($ARGV[1]) {
my $tmpstr = $ARGV[1];
if($tmpstr =~ /^(\d\d?\d?)\.(\d\d?\d?)\.(\d\d?\d?)\.(\d\d?\d?)$/) {
$listenaddr = "$1.$2.$3.$4" if($ipvnum == 4);
}
elsif($ipvnum == 6) {
$listenaddr = $tmpstr;
$listenaddr =~ s/^\[(.*)\]$/$1/;
}
shift @ARGV;
}
}
else {
print STDERR "\nWarning: ftpserver.pl unknown parameter: $ARGV[0]\n";
}
shift @ARGV;
}
if(!$srcdir) {
$srcdir = $ENV{'srcdir'} || '.';
}
if(!$pidfile) {
$pidfile = "$path/". server_pidfilename($proto, $ipvnum, $idnum);
}
if(!$logfile) {
$logfile = server_logfilename($logdir, $proto, $ipvnum, $idnum);
}
$mainsockf_pidfile = "$path/".
mainsockf_pidfilename($proto, $ipvnum, $idnum);
$mainsockf_logfile =
mainsockf_logfilename($logdir, $proto, $ipvnum, $idnum);
if($proto eq 'ftp') {
$datasockf_pidfile = "$path/".
datasockf_pidfilename($proto, $ipvnum, $idnum);
$datasockf_logfile =
datasockf_logfilename($logdir, $proto, $ipvnum, $idnum);
}
$srvrname = servername_str($proto, $ipvnum, $idnum);
$idstr = "$idnum" if($idnum > 1);
protocolsetup($proto);
$SIG{INT} = \&exit_signal_handler;
$SIG{TERM} = \&exit_signal_handler;
startsf();
logmsg sprintf("%s server listens on port IPv${ipvnum}/${port}\n", uc($proto));
open(PID, ">$pidfile");
print PID $$."\n";
close(PID);
logmsg("logged pid $$ in $pidfile\n");
while(1) {
my $input;
logmsg "Awaiting input\n";
sysread_or_die(\*SFREAD, \$input, 5);
if($input !~ /^CNCT/) {
logmsg "sockfilt said: $input";
next;
}
logmsg "====> Client connect\n";
set_advisor_read_lock($SERVERLOGS_LOCK);
$serverlogslocked = 1;
$| = 1;
killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data');
&customize();
sendcontrol @welcome;
if($ftplistparserstate) {
undef $ftplistparserstate;
}
if($ftptargetdir) {
undef $ftptargetdir;
}
if($verbose) {
for(@welcome) {
print STDERR "OUT: $_";
}
}
while(1) {
my $i;
sysread_or_die(\*SFREAD, \$i, 5);
if($i !~ /^DATA/) {
logmsg "sockfilt said $i";
if($i =~ /^DISC/) {
last;
}
next;
}
sysread_or_die(\*SFREAD, \$i, 5);
my $size = 0;
if($i =~ /^([0-9a-fA-F]{4})\n/) {
$size = hex($1);
}
sysread SFREAD, $_, $size;
ftpmsg $_;
s/[\n\r]+$//;
my $FTPCMD;
my $FTPARG;
my $full=$_;
if($proto eq "imap") {
unless (m/^([^ ]+) ([^ ]+) (.*)/ ||
m/^([^ ]+) ([^ ]+)/) {
sendcontrol "$1 '$_': command not understood.\r\n";
last;
}
$cmdid=$1; $FTPCMD=$2;
$FTPARG=$3;
}
elsif (m/^([A-Z]{3,4})(\s(.*))?$/i) {
$FTPCMD=$1;
$FTPARG=$3;
}
elsif($proto eq "smtp" && m/^[A-Z0-9+\/]{0,512}={0,2}$/i) {
$FTPCMD=$_;
$FTPARG="";
}
else {
sendcontrol "500 '$_': command not understood.\r\n";
last;
}
logmsg "< \"$full\"\n";
if($verbose) {
print STDERR "IN: $full\n";
}
my $delay = $delayreply{$FTPCMD};
if($delay) {
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})) {
$customreply{$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 {
$check=1; }
unless($fake && ($fake ne "")) {
my $func = $commandfunc{$FTPCMD};
if($func) {
&$func($FTPARG, $FTPCMD);
$check=0; }
}
if($check) {
logmsg "$FTPCMD wasn't handled!\n";
sendcontrol "500 $FTPCMD is not dealt with!\r\n";
}
} logmsg "====> Client disconnected\n";
if($serverlogslocked) {
$serverlogslocked = 0;
clear_advisor_read_lock($SERVERLOGS_LOCK);
}
}
killsockfilters($proto, $ipvnum, $idnum, $verbose);
unlink($pidfile);
if($serverlogslocked) {
$serverlogslocked = 0;
clear_advisor_read_lock($SERVERLOGS_LOCK);
}
exit;