mirror of
https://github.com/curl/curl.git
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905 lines
24 KiB
Perl
905 lines
24 KiB
Perl
#!/usr/bin/env perl
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#***************************************************************************
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# _ _ ____ _
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# Project ___| | | | _ \| |
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# / __| | | | |_) | |
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# | (__| |_| | _ <| |___
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# \___|\___/|_| \_\_____|
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#
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# Copyright (C) 1998 - 2007, Daniel Stenberg, <daniel@haxx.se>, et al.
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#
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# This software is licensed as described in the file COPYING, which
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# you should have received as part of this distribution. The terms
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# are also available at http://curl.haxx.se/docs/copyright.html.
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#
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# You may opt to use, copy, modify, merge, publish, distribute and/or sell
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# copies of the Software, and permit persons to whom the Software is
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# furnished to do so, under the terms of the COPYING file.
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#
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# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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# KIND, either express or implied.
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#
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# $Id$
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###########################################################################
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# This is the FTP server designed for the curl test suite.
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#
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# It is meant to exercise curl, it is not meant to be a fully working
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# or even very standard compliant server.
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#
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# You may optionally specify port on the command line, otherwise it'll
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# default to port 8921.
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#
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# All socket/network/TCP related stuff is done by the 'sockfilt' program.
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#
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use strict;
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use IPC::Open2;
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#use Time::HiRes qw( gettimeofday ); # not available in perl 5.6
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require "getpart.pm";
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require "ftp.pm";
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my $ftpdnum="";
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# open and close each time to allow removal at any time
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sub logmsg {
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# if later than perl 5.6 is used
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# my ($seconds, $microseconds) = gettimeofday;
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my $seconds = time();
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my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) =
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localtime($seconds);
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open(FTPLOG, ">>log/ftpd$ftpdnum.log");
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printf FTPLOG ("%02d:%02d:%02d ", $hour, $min, $sec);
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print FTPLOG @_;
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close(FTPLOG);
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}
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sub ftpmsg {
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# append to the server.input file
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open(INPUT, ">>log/server$ftpdnum.input") ||
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logmsg "failed to open log/server$ftpdnum.input\n";
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print INPUT @_;
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close(INPUT);
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# use this, open->print->close system only to make the file
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# open as little as possible, to make the test suite run
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# better on windows/cygwin
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}
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my $verbose=0; # set to 1 for debugging
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my $pasvbadip=0;
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my $retrweirdo=0;
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my $retrnosize=0;
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my $srcdir=".";
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my $nosave=0;
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my $controldelay=0; # set to 1 to delay the control connect data sending to
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# test that curl deals with that nicely
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my $slavepid; # for the DATA connection sockfilt slave process
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my $ipv6;
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my $ext; # append to log/pid file names
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my $grok_eprt;
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my $port = 8921; # just a default
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my $pidfile = ".ftpd.pid"; # a default, use --pidfile
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do {
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if($ARGV[0] eq "-v") {
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$verbose=1;
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}
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elsif($ARGV[0] eq "-s") {
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$srcdir=$ARGV[1];
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shift @ARGV;
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}
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elsif($ARGV[0] eq "--id") {
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$ftpdnum=$ARGV[1];
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shift @ARGV;
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}
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elsif($ARGV[0] eq "--pidfile") {
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$pidfile=$ARGV[1];
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shift @ARGV;
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}
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elsif($ARGV[0] eq "--ipv6") {
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$ipv6="--ipv6";
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$ext="ipv6";
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$grok_eprt = 1;
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}
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elsif($ARGV[0] eq "--port") {
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$port = $ARGV[1];
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shift @ARGV;
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}
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} while(shift @ARGV);
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sub catch_zap {
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my $signame = shift;
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print STDERR "ftpserver.pl received SIG$signame, exiting\n";
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ftpkillslaves(1);
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die "Somebody sent me a SIG$signame";
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}
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$SIG{INT} = \&catch_zap;
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$SIG{KILL} = \&catch_zap;
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my $sfpid;
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local(*SFREAD, *SFWRITE);
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sub sysread_or_die {
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my $FH = shift;
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my $scalar = shift;
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my $length = shift;
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my $fcaller;
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my $lcaller;
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my $result;
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$result = sysread($$FH, $$scalar, $length);
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if(not defined $result) {
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($fcaller, $lcaller) = (caller)[1,2];
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logmsg "Failed to read input\n";
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logmsg "Error: ftp$ftpdnum$ext sysread error: $!\n";
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kill(9, $sfpid);
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die "Died in sysread_or_die() when called from $fcaller " .
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"at line $lcaller. ftp$ftpdnum$ext sysread error: $!\n";
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}
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elsif($result == 0) {
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($fcaller, $lcaller) = (caller)[1,2];
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logmsg "Failed to read input\n";
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logmsg "Error: ftp$ftpdnum$ext read zero\n";
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kill(9, $sfpid);
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die "Died in sysread_or_die() when called from $fcaller " .
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"at line $lcaller. ftp$ftpdnum$ext read zero\n";
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}
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return $result;
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}
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sub startsf {
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my $cmd="./server/sockfilt --port $port --logfile log/sockctrl$ftpdnum$ext.log --pidfile .sockfilt$ftpdnum$ext.pid $ipv6";
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$sfpid = open2(*SFREAD, *SFWRITE, $cmd);
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print STDERR "$cmd\n" if($verbose);
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print SFWRITE "PING\n";
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my $pong;
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sysread SFREAD, $pong, 5;
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if($pong !~ /^PONG/) {
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logmsg "Failed sockfilt command: $cmd\n";
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kill(9, $sfpid);
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die "Failed to start sockfilt!";
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}
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}
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# remove the file here so that if startsf() fails, it is very noticable
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unlink($pidfile);
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startsf();
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logmsg sprintf("FTP server listens on port IPv%d/$port\n", $ipv6?6:4);
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open(PID, ">$pidfile");
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print PID $$."\n";
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close(PID);
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logmsg("logged pid $$ in $pidfile\n");
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sub sockfilt {
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my $l;
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foreach $l (@_) {
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printf SFWRITE "DATA\n%04x\n", length($l);
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print SFWRITE $l;
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}
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}
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# Send data to the client on the control stream, which happens to be plain
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# stdout.
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sub sendcontrol {
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if(!$controldelay) {
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# spit it all out at once
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sockfilt @_;
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}
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else {
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my $a = join("", @_);
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my @a = split("", $a);
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for(@a) {
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sockfilt $_;
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select(undef, undef, undef, 0.01);
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}
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}
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my $log;
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foreach $log (@_) {
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my $l = $log;
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$l =~ s/[\r\n]//g;
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logmsg "> \"$l\"\n";
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}
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}
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# Send data to the client on the data stream
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sub senddata {
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my $l;
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foreach $l (@_) {
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printf DWRITE "DATA\n%04x\n", length($l);
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print DWRITE $l;
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}
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}
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# USER is ok in fresh state
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my %commandok = (
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'USER' => 'fresh|passwd',
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'PASS' => 'passwd',
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'PASV' => 'loggedin|twosock',
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'EPSV' => 'loggedin|twosock',
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'PORT' => 'loggedin|twosock',
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'EPRT' => 'loggedin|twosock',
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'TYPE' => 'loggedin|twosock',
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'LIST' => 'twosock',
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'NLST' => 'twosock',
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'RETR' => 'twosock',
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'STOR' => 'twosock',
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'APPE' => 'twosock',
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'REST' => 'twosock',
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'ACCT' => 'loggedin',
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'CWD' => 'loggedin|twosock',
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'SYST' => 'loggedin',
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'SIZE' => 'loggedin|twosock',
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'PWD' => 'loggedin|twosock',
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'MKD' => 'loggedin|twosock',
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'QUIT' => 'loggedin|twosock',
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'RNFR' => 'loggedin|twosock',
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'RNTO' => 'loggedin|twosock',
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'DELE' => 'loggedin|twosock',
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'MDTM' => 'loggedin|twosock',
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'NOOP' => 'loggedin|twosock',
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);
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# initially, we're in 'fresh' state
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my %statechange = ( 'USER' => 'passwd', # USER goes to passwd state
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'PASS' => 'loggedin', # PASS goes to loggedin state
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'PORT' => 'twosock', # PORT goes to twosock
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'EPRT' => 'twosock', # EPRT goes to twosock
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'PASV' => 'twosock', # PASV goes to twosock
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'EPSV' => 'twosock', # EPSV goes to twosock
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);
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# this text is shown before the function specified below is run
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my %displaytext = ('USER' => '331 We are happy you popped in!',
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'PASS' => '230 Welcome you silly person',
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'PORT' => '200 You said PORT - I say FINE',
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'TYPE' => '200 I modify TYPE as you wanted',
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'LIST' => '150 here comes a directory',
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'NLST' => '150 here comes a directory',
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'CWD' => '250 CWD command successful.',
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'SYST' => '215 UNIX Type: L8', # just fake something
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'QUIT' => '221 bye bye baby', # just reply something
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'PWD' => '257 "/nowhere/anywhere" is current directory',
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'MKD' => '257 Created your requested directory',
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'REST' => '350 Yeah yeah we set it there for you',
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'DELE' => '200 OK OK OK whatever you say',
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'RNFR' => '350 Received your order. Please provide more',
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'RNTO' => '250 Ok, thanks. File renaming completed.',
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'NOOP' => '200 Yes, I\'m very good at doing nothing.',
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);
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# callback functions for certain commands
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my %commandfunc = ( 'PORT' => \&PORT_command,
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'EPRT' => \&PORT_command,
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'LIST' => \&LIST_command,
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'NLST' => \&NLST_command,
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'PASV' => \&PASV_command,
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'EPSV' => \&PASV_command,
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'RETR' => \&RETR_command,
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'SIZE' => \&SIZE_command,
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'REST' => \&REST_command,
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'STOR' => \&STOR_command,
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'APPE' => \&STOR_command, # append looks like upload
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'MDTM' => \&MDTM_command,
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);
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sub close_dataconn {
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my ($closed)=@_; # non-zero if already disconnected
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if(!$closed) {
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logmsg "* disconnect data connection\n";
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print DWRITE "DISC\n";
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my $i;
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sysread DREAD, $i, 5;
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}
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else {
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logmsg "data connection already disconnected\n";
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}
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logmsg "=====> Closed data connection\n";
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logmsg "* quit sockfilt for data (pid $slavepid)\n";
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print DWRITE "QUIT\n";
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waitpid $slavepid, 0;
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$slavepid=0;
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}
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my $rest=0;
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sub REST_command {
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$rest = $_[0];
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logmsg "Set REST position to $rest\n"
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}
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sub LIST_command {
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# print "150 ASCII data connection for /bin/ls (193.15.23.1,59196) (0 bytes)\r\n";
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# this is a built-in fake-dir ;-)
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my @ftpdir=("total 20\r\n",
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"drwxr-xr-x 8 98 98 512 Oct 22 13:06 .\r\n",
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"drwxr-xr-x 8 98 98 512 Oct 22 13:06 ..\r\n",
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"drwxr-xr-x 2 98 98 512 May 2 1996 .NeXT\r\n",
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"-r--r--r-- 1 0 1 35 Jul 16 1996 README\r\n",
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"lrwxrwxrwx 1 0 1 7 Dec 9 1999 bin -> usr/bin\r\n",
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"dr-xr-xr-x 2 0 1 512 Oct 1 1997 dev\r\n",
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"drwxrwxrwx 2 98 98 512 May 29 16:04 download.html\r\n",
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"dr-xr-xr-x 2 0 1 512 Nov 30 1995 etc\r\n",
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"drwxrwxrwx 2 98 1 512 Oct 30 14:33 pub\r\n",
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"dr-xr-xr-x 5 0 1 512 Oct 1 1997 usr\r\n");
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logmsg "pass LIST data on data connection\n";
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for(@ftpdir) {
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senddata $_;
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}
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close_dataconn(0);
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sendcontrol "226 ASCII transfer complete\r\n";
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return 0;
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}
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sub NLST_command {
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my @ftpdir=("file", "with space", "fake", "..", " ..", "funny", "README");
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logmsg "pass NLST data on data connection\n";
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for(@ftpdir) {
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senddata "$_\r\n";
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}
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close_dataconn(0);
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sendcontrol "226 ASCII transfer complete\r\n";
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return 0;
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}
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sub MDTM_command {
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my $testno = $_[0];
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loadtest("$srcdir/data/test$testno");
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my @data = getpart("reply", "mdtm");
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my $reply = $data[0];
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chomp $reply;
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if($reply <0) {
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sendcontrol "550 $testno: no such file.\r\n";
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}
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elsif($reply) {
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sendcontrol "$reply\r\n";
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}
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else {
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sendcontrol "500 MDTM: no such command.\r\n";
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}
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return 0;
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}
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sub SIZE_command {
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my $testno = $_[0];
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loadtest("$srcdir/data/test$testno");
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if($testno eq "verifiedserver") {
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my $response = "WE ROOLZ: $$\r\n";
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my $size = length($response);
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sendcontrol "213 $size\r\n";
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return 0;
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}
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my @data = getpart("reply", "size");
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my $size = $data[0];
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if($size) {
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if($size > -1) {
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sendcontrol "213 $size\r\n";
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}
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else {
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sendcontrol "550 $testno: No such file or directory.\r\n";
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}
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}
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else {
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$size=0;
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@data = getpart("reply", "data");
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for(@data) {
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$size += length($_);
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}
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if($size) {
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sendcontrol "213 $size\r\n";
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}
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else {
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sendcontrol "550 $testno: No such file or directory.\r\n";
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}
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}
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return 0;
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}
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sub RETR_command {
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my ($testno) = @_;
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if($testno =~ /^verifiedserver$/) {
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# this is the secret command that verifies that this actually is
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# the curl test server
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my $response = "WE ROOLZ: $$\r\n";
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my $len = length($response);
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sendcontrol "150 Binary junk ($len bytes).\r\n";
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senddata "WE ROOLZ: $$\r\n";
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close_dataconn(0);
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sendcontrol "226 File transfer complete\r\n";
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if($verbose) {
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print STDERR "FTPD: We returned proof we are the test server\n";
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}
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return 0;
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}
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$testno =~ s/^([^0-9]*)//;
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loadtest("$srcdir/data/test$testno");
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my @data = getpart("reply", "data");
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my $size=0;
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for(@data) {
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$size += length($_);
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}
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my %hash = getpartattr("reply", "data");
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if($size || $hash{'sendzero'}) {
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if($rest) {
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# move read pointer forward
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$size -= $rest;
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logmsg "REST $rest was removed from size, makes $size left\n";
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$rest = 0; # reset REST offset again
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}
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if($retrweirdo) {
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sendcontrol "150 Binary data connection for $testno () ($size bytes).\r\n",
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"226 File transfer complete\r\n";
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for(@data) {
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my $send = $_;
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senddata $send;
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}
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close_dataconn(0);
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$retrweirdo=0; # switch off the weirdo again!
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}
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else {
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my $sz = "($size bytes)";
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if($retrnosize) {
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$sz = "size?";
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}
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sendcontrol "150 Binary data connection for $testno () $sz.\r\n";
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for(@data) {
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my $send = $_;
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senddata $send;
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}
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close_dataconn(0);
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sendcontrol "226 File transfer complete\r\n";
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}
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}
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else {
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sendcontrol "550 $testno: No such file or directory.\r\n";
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}
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return 0;
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}
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sub STOR_command {
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my $testno=$_[0];
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my $filename = "log/upload.$testno";
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logmsg "STOR test number $testno in $filename\n";
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sendcontrol "125 Gimme gimme gimme!\r\n";
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open(FILE, ">$filename") ||
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return 0; # failed to open output
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my $line;
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my $ulsize=0;
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my $disc=0;
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while (5 == (sysread DREAD, $line, 5)) {
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if($line eq "DATA\n") {
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my $i;
|
|
sysread DREAD, $i, 5;
|
|
|
|
#print STDERR " GOT: $i";
|
|
|
|
my $size = hex($i);
|
|
sysread DREAD, $line, $size;
|
|
|
|
#print STDERR " GOT: $size bytes\n";
|
|
|
|
$ulsize += $size;
|
|
print FILE $line if(!$nosave);
|
|
logmsg "> Appending $size bytes to file\n";
|
|
}
|
|
elsif($line eq "DISC\n") {
|
|
# disconnect!
|
|
$disc=1;
|
|
last;
|
|
}
|
|
else {
|
|
logmsg "No support for: $line";
|
|
last;
|
|
}
|
|
}
|
|
if($nosave) {
|
|
print FILE "$ulsize bytes would've been stored here\n";
|
|
}
|
|
close(FILE);
|
|
close_dataconn($disc);
|
|
logmsg "received $ulsize bytes upload\n";
|
|
sendcontrol "226 File transfer complete\r\n";
|
|
return 0;
|
|
}
|
|
|
|
sub PASV_command {
|
|
my ($arg, $cmd)=@_;
|
|
my $pasvport;
|
|
my $pidf=".sockdata$ftpdnum$ext.pid";
|
|
|
|
my $prev = checkserver($pidf);
|
|
if($prev > 0) {
|
|
print "kill existing server: $prev\n" if($verbose);
|
|
kill(9, $prev);
|
|
}
|
|
|
|
# We fire up a new sockfilt to do the data tranfer for us.
|
|
$slavepid = open2(\*DREAD, \*DWRITE,
|
|
"./server/sockfilt --port 0 --logfile log/sockdata$ftpdnum$ext.log --pidfile $pidf $ipv6");
|
|
|
|
print DWRITE "PING\n";
|
|
my $pong;
|
|
|
|
sysread_or_die(\*DREAD, \$pong, 5);
|
|
|
|
if($pong !~ /^PONG/) {
|
|
kill(9, $slavepid);
|
|
sendcontrol "500 no free ports!\r\n";
|
|
logmsg "failed to run sockfilt for data connection\n";
|
|
return 0;
|
|
}
|
|
|
|
logmsg "Run sockfilt for data on pid $slavepid\n";
|
|
|
|
# Find out what port we listen on
|
|
my $i;
|
|
print DWRITE "PORT\n";
|
|
|
|
# READ the response code
|
|
sysread_or_die(\*DREAD, \$i, 5);
|
|
|
|
# READ the response size
|
|
sysread_or_die(\*DREAD, \$i, 5);
|
|
|
|
my $size = hex($i);
|
|
|
|
# READ the response data
|
|
sysread_or_die(\*DREAD, \$i, $size);
|
|
|
|
# The data is in the format
|
|
# IPvX/NNN
|
|
|
|
if($i =~ /IPv(\d)\/(\d+)/) {
|
|
# FIX: deal with IP protocol version
|
|
$pasvport = $2;
|
|
}
|
|
|
|
if($cmd ne "EPSV") {
|
|
# PASV reply
|
|
my $p="127,0,0,1";
|
|
if($pasvbadip) {
|
|
$p="1,2,3,4";
|
|
}
|
|
sendcontrol sprintf("227 Entering Passive Mode ($p,%d,%d)\n",
|
|
($pasvport/256), ($pasvport%256));
|
|
}
|
|
else {
|
|
# EPSV reply
|
|
sendcontrol sprintf("229 Entering Passive Mode (|||%d|)\n", $pasvport);
|
|
}
|
|
|
|
eval {
|
|
local $SIG{ALRM} = sub { die "alarm\n" };
|
|
|
|
# assume swift operations unless explicitly slow
|
|
alarm ($controldelay?20:5);
|
|
|
|
# Wait for 'CNCT'
|
|
my $input;
|
|
|
|
while(sysread(DREAD, $input, 5)) {
|
|
|
|
if($input !~ /^CNCT/) {
|
|
# we wait for a connected client
|
|
logmsg "Odd, we got $input from client\n";
|
|
next;
|
|
}
|
|
logmsg "====> Client DATA connect\n";
|
|
last;
|
|
}
|
|
alarm 0;
|
|
};
|
|
if ($@) {
|
|
# timed out
|
|
|
|
print DWRITE "QUIT\n";
|
|
waitpid $slavepid, 0;
|
|
logmsg "accept failed\n";
|
|
$slavepid=0;
|
|
return;
|
|
}
|
|
else {
|
|
logmsg "data connection setup on port $pasvport\n";
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
# Support both PORT and EPRT here. Consider LPRT too.
|
|
|
|
sub PORT_command {
|
|
my ($arg, $cmd) = @_;
|
|
my $port;
|
|
|
|
# We always ignore the given IP and use localhost.
|
|
|
|
if($cmd eq "PORT") {
|
|
if($arg !~ /(\d+),(\d+),(\d+),(\d+),(\d+),(\d+)/) {
|
|
logmsg "bad PORT-line: $arg\n";
|
|
sendcontrol "500 silly you, go away\r\n";
|
|
return 0;
|
|
}
|
|
$port = ($5<<8)+$6;
|
|
}
|
|
# EPRT |2|::1|49706|
|
|
elsif(($cmd eq "EPRT") && ($grok_eprt)) {
|
|
if($arg !~ /(\d+)\|([^\|]+)\|(\d+)/) {
|
|
sendcontrol "500 silly you, go away\r\n";
|
|
return 0;
|
|
}
|
|
sendcontrol "200 Thanks for dropping by. We contact you later\r\n";
|
|
$port = $3;
|
|
}
|
|
else {
|
|
sendcontrol "500 we don't like $cmd now\r\n";
|
|
return 0;
|
|
}
|
|
|
|
if(!$port || $port > 65535) {
|
|
print STDERR "very illegal PORT number: $port\n";
|
|
return 1;
|
|
}
|
|
|
|
# We fire up a new sockfilt to do the data tranfer for us.
|
|
# FIX: make it use IPv6 if need be
|
|
$slavepid = open2(\*DREAD, \*DWRITE,
|
|
"./server/sockfilt --connect $port --logfile log/sockdata$ftpdnum$ext.log --pidfile .sockdata$ftpdnum$ext.pid $ipv6");
|
|
|
|
print DWRITE "PING\n";
|
|
my $pong;
|
|
sysread DREAD, $pong, 5;
|
|
|
|
if($pong !~ /^PONG/) {
|
|
logmsg "Failed sockfilt for data connection\n";
|
|
kill(9, $slavepid);
|
|
}
|
|
|
|
logmsg "====> Client DATA connect to port $port\n";
|
|
|
|
return;
|
|
}
|
|
|
|
my %customreply;
|
|
my %customcount;
|
|
my %delayreply;
|
|
sub customize {
|
|
undef %customreply;
|
|
|
|
$nosave = 0; # default is to save as normal
|
|
$controldelay = 0; # default is no delaying the responses
|
|
|
|
open(CUSTOM, "<log/ftpserver.cmd") ||
|
|
return 1;
|
|
|
|
logmsg "FTPD: Getting commands from log/ftpserver.cmd\n";
|
|
|
|
while(<CUSTOM>) {
|
|
if($_ =~ /REPLY ([A-Z]+) (.*)/) {
|
|
$customreply{$1}=$2;
|
|
logmsg "FTPD: set custom reply for $1\n";
|
|
}
|
|
if($_ =~ /COUNT ([A-Z]+) (.*)/) {
|
|
# we blank the customreply for this command when having
|
|
# been used this number of times
|
|
$customcount{$1}=$2;
|
|
logmsg "FTPD: blank custom reply for $1 after $2 uses\n";
|
|
}
|
|
elsif($_ =~ /DELAY ([A-Z]+) (\d*)/) {
|
|
$delayreply{$1}=$2;
|
|
logmsg "FTPD: delay reply for $1 with $2 seconds\n";
|
|
}
|
|
elsif($_ =~ /SLOWDOWN/) {
|
|
$controldelay=1;
|
|
logmsg "FTPD: send response with 0.1 sec delay between each byte\n";
|
|
}
|
|
elsif($_ =~ /RETRWEIRDO/) {
|
|
logmsg "FTPD: instructed to use RETRWEIRDO\n";
|
|
$retrweirdo=1;
|
|
}
|
|
elsif($_ =~ /RETRNOSIZE/) {
|
|
logmsg "FTPD: instructed to use RETRNOSIZE\n";
|
|
$retrnosize=1;
|
|
}
|
|
elsif($_ =~ /PASVBADIP/) {
|
|
logmsg "FTPD: instructed to use PASVBADIP\n";
|
|
$pasvbadip=1;
|
|
}
|
|
elsif($_ =~ /NOSAVE/) {
|
|
# don't actually store the file we upload - to be used when
|
|
# uploading insanely huge amounts
|
|
$nosave = 1;
|
|
logmsg "FTPD: NOSAVE prevents saving of uploaded data\n";
|
|
}
|
|
}
|
|
close(CUSTOM);
|
|
}
|
|
|
|
my @welcome=(
|
|
'220- _ _ ____ _ '."\r\n",
|
|
'220- ___| | | | _ \| | '."\r\n",
|
|
'220- / __| | | | |_) | | '."\r\n",
|
|
'220- | (__| |_| | _ <| |___ '."\r\n",
|
|
'220 \___|\___/|_| \_\_____|'."\r\n");
|
|
|
|
|
|
while(1) {
|
|
#
|
|
# We read 'sockfilt' commands.
|
|
#
|
|
my $input;
|
|
|
|
logmsg "Awaiting input\n";
|
|
sysread_or_die(\*SFREAD, \$input, 5);
|
|
|
|
if($input !~ /^CNCT/) {
|
|
# we wait for a connected client
|
|
logmsg "sockfilt said: $input";
|
|
next;
|
|
}
|
|
logmsg "====> Client connect\n";
|
|
|
|
# flush data:
|
|
$| = 1;
|
|
|
|
kill(9, $slavepid) if($slavepid);
|
|
$slavepid=0;
|
|
|
|
&customize(); # read test control instructions
|
|
|
|
sendcontrol @welcome;
|
|
if($verbose) {
|
|
for(@welcome) {
|
|
print STDERR "OUT: $_";
|
|
}
|
|
}
|
|
my $state="fresh";
|
|
|
|
while(1) {
|
|
my $i;
|
|
|
|
# Now we expect to read DATA\n[hex size]\n[prot], where the [prot]
|
|
# part only is FTP lingo.
|
|
|
|
# COMMAND
|
|
sysread_or_die(\*SFREAD, \$i, 5);
|
|
|
|
if($i !~ /^DATA/) {
|
|
logmsg "sockfilt said $i";
|
|
if($i =~ /^DISC/) {
|
|
# disconnect
|
|
last;
|
|
}
|
|
next;
|
|
}
|
|
|
|
# SIZE of data
|
|
sysread_or_die(\*SFREAD, \$i, 5);
|
|
|
|
my $size = hex($i);
|
|
|
|
# data
|
|
sysread SFREAD, $_, $size;
|
|
|
|
ftpmsg $_;
|
|
|
|
# Remove trailing CRLF.
|
|
s/[\n\r]+$//;
|
|
|
|
unless (m/^([A-Z]{3,4})\s?(.*)/i) {
|
|
sendcontrol "500 '$_': command not understood.\r\n";
|
|
last;
|
|
}
|
|
my $FTPCMD=$1;
|
|
my $FTPARG=$2;
|
|
my $full=$_;
|
|
|
|
logmsg "< \"$full\"\n";
|
|
|
|
if($verbose) {
|
|
print STDERR "IN: $full\n";
|
|
}
|
|
|
|
my $ok = $commandok{$FTPCMD};
|
|
if($ok !~ /$state/) {
|
|
sendcontrol "500 $FTPCMD not OK in state: $state!\r\n";
|
|
next;
|
|
}
|
|
|
|
my $newstate=$statechange{$FTPCMD};
|
|
if($newstate eq "") {
|
|
# remain in the same state
|
|
}
|
|
else {
|
|
|
|
if($state != $newstate) {
|
|
logmsg "switch to state $state\n";
|
|
}
|
|
$state = $newstate;
|
|
}
|
|
|
|
my $delay = $delayreply{$FTPCMD};
|
|
if($delay) {
|
|
# just go sleep this many seconds!
|
|
logmsg("Sleep for $delay seconds\n");
|
|
sleep($delay);
|
|
}
|
|
|
|
my $text;
|
|
$text = $customreply{$FTPCMD};
|
|
my $fake = $text;
|
|
if($text eq "") {
|
|
$text = $displaytext{$FTPCMD};
|
|
}
|
|
else {
|
|
if($customcount{$FTPCMD} && (!--$customcount{$FTPCMD})) {
|
|
# used enough number of times, now blank the customreply
|
|
$customreply{$FTPCMD}="";
|
|
}
|
|
}
|
|
if($text) {
|
|
sendcontrol "$text\r\n";
|
|
}
|
|
|
|
if($fake eq "") {
|
|
# only perform this if we're not faking a reply
|
|
# see if the new state is a function caller.
|
|
my $func = $commandfunc{$FTPCMD};
|
|
if($func) {
|
|
# it is!
|
|
&$func($FTPARG, $FTPCMD);
|
|
}
|
|
}
|
|
|
|
} # while(1)
|
|
logmsg "====> Client disconnected\n";
|
|
}
|
|
|
|
print SFWRITE "QUIT\n";
|
|
waitpid $sfpid, 0;
|
|
exit;
|