347 lines
9.3 KiB
Perl
347 lines
9.3 KiB
Perl
#!/usr/bin/perl
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#
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# $Id$
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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 excersive curl, it is not meant to become 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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use Socket;
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use Carp;
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use FileHandle;
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use strict;
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open(FTPLOG, ">log/ftpd.log") ||
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print STDERR "failed to open log file, runs without logging\n";
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sub logmsg { print FTPLOG "$$: "; print FTPLOG @_; }
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sub ftpmsg { print INPUT @_; }
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my $verbose=0; # set to 1 for debugging
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my $port = 8921; # just a default
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do {
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if($ARGV[0] eq "-v") {
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$verbose=1;
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}
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elsif($ARGV[0] =~ /^(\d+)$/) {
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$port = $1;
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}
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} while(shift @ARGV);
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my $proto = getprotobyname('tcp') || 6;
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my $ftp_sendfile=""; # set to a file name when the file should be sent
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socket(Server, PF_INET, SOCK_STREAM, $proto)|| die "socket: $!";
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setsockopt(Server, SOL_SOCKET, SO_REUSEADDR,
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pack("l", 1)) || die "setsockopt: $!";
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bind(Server, sockaddr_in($port, INADDR_ANY))|| die "bind: $!";
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listen(Server,SOMAXCONN) || die "listen: $!";
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print "FTP server started on port $port\n";
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open(PID, ">.ftpserver.pid");
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print PID $$;
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close(PID);
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my $waitedpid = 0;
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my $paddr;
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sub REAPER {
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$waitedpid = wait;
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$SIG{CHLD} = \&REAPER; # loathe sysV
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logmsg "reaped $waitedpid" . ($? ? " with exit $?\n" : "\n");
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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",
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"PASS" => "passwd",
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"PASV" => "loggedin|twosock",
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"PORT" => "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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"CWD" => "loggedin",
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"SIZE" => "loggedin|twosock",
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"QUIT" => "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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'PASV' => 'twosock', # PASV 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!', # output FTP line
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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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'QUIT' => '221 bye bye baby',
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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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'LIST' => \&LIST_command,
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'NLST' => \&LIST_command, # use LIST for now
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'PASV' => \&PASV_command,
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'RETR' => \&RETR_command,
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'SIZE' => \&SIZE_command,
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'STOR' => \&STOR_command,
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);
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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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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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logmsg "$$: pass data to child pid\n";
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for(@ftpdir) {
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print SOCK $_;
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}
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close(SOCK);
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logmsg "$$: done passing data to child pid\n";
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print "226 ASCII transfer complete\r\n";
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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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logmsg "SIZE number $testno\n";
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my $filename = "data/reply$testno.txt";
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my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
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$atime,$mtime,$ctime,$blksize,$blocks)
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= stat($filename);
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if($size) {
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print "213 $size\r\n";
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}
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else {
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print "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 RETR_command {
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my $testno = $_[0];
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logmsg "RETR test number $testno\n";
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my $filename = "data/reply$testno.txt";
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my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
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$atime,$mtime,$ctime,$blksize,$blocks)
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= stat($filename);
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if($size) {
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print "150 Binary data connection for $testno () ($size bytes).\r\n";
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open(FILE, "<$filename");
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while(<FILE>) {
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print SOCK $_;
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}
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close(FILE);
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close(SOCK);
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print "226 File transfer complete\r\n";
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}
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else {
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print "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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logmsg "STOR test number $testno\n";
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my $filename = "log/ftpout.$testno";
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print "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 $ulsize=0;
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while (defined($line = <SOCK>)) {
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$ulsize += length($line);
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print FILE $line;
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}
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close(FILE);
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close(SOCK);
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logmsg "received $ulsize bytes upload\n";
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print "226 File transfer complete\r\n";
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return 0;
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}
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sub PASV_command {
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socket(Server2, PF_INET, SOCK_STREAM, $proto) || die "socket: $!";
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setsockopt(Server2, SOL_SOCKET, SO_REUSEADDR,
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pack("l", 1)) || die "setsockopt: $!";
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while($port < 11000) {
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if(bind(Server2, sockaddr_in($port, INADDR_ANY))) {
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last;
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}
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$port++; # try next port please
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}
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if(11000 == $port) {
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print "500 no free ports!\r\n";
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logmsg "couldn't find free port\n";
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return 0;
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}
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listen(Server2,SOMAXCONN) || die "listen: $!";
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printf("227 Entering Passive Mode (127,0,0,1,%d,%d)\n",
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($port/256), ($port%256));
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my $waitedpid;
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my $paddr;
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$paddr = accept(SOCK, Server2);
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my($port,$iaddr) = sockaddr_in($paddr);
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my $name = gethostbyaddr($iaddr,AF_INET);
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logmsg "$$: data connection from $name [", inet_ntoa($iaddr), "] at port $port\n";
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return \&SOCK;
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}
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sub PORT_command {
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my $arg = $_[0];
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if($arg !~ /(\d+),(\d+),(\d+),(\d+),(\d+),(\d+)/) {
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logmsg "bad PORT-line: $arg\n";
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print "500 silly you, go away\r\n";
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return 0;
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}
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my $iaddr = inet_aton("$1.$2.$3.$4");
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my $paddr = sockaddr_in(($5<<8)+$6, $iaddr);
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my $proto = getprotobyname('tcp') || 6;
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socket(SOCK, PF_INET, SOCK_STREAM, $proto) || die "major failure";
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connect(SOCK, $paddr) || return 1;
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return \&SOCK;
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}
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$SIG{CHLD} = \&REAPER;
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my @welcome=(
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'220- _ _ ____ _ '."\r\n",
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'220- ___| | | | _ \| | '."\r\n",
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'220- / __| | | | |_) | | '."\r\n",
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'220- | (__| |_| | _ <| |___ '."\r\n",
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'220 \___|\___/|_| \_\_____|'."\r\n");
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for ( $waitedpid = 0;
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($paddr = accept(Client,Server)) || $waitedpid;
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$waitedpid = 0, close Client)
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{
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next if $waitedpid and not $paddr;
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my($port,$iaddr) = sockaddr_in($paddr);
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my $name = gethostbyaddr($iaddr,AF_INET);
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# flush data:
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$| = 1;
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logmsg "connection from $name [", inet_ntoa($iaddr), "] at port $port\n";
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open(STDIN, "<&Client") || die "can't dup client to stdin";
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open(STDOUT, ">&Client") || die "can't dup client to stdout";
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open(INPUT, ">log/server.input") ||
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logmsg "failed to open log/server.input\n";
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FTPLOG->autoflush(1);
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INPUT->autoflush(1);
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print @welcome;
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my $state="fresh";
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while(1) {
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last unless defined ($_ = <STDIN>);
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ftpmsg $_;
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# Remove trailing CRLF.
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s/[\n\r]+$//;
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unless (m/^([A-Z]{3,4})\s?(.*)/i) {
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print "500 '$_': command not understood.\r\n";
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next;
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}
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my $FTPCMD=$1;
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my $FTPARG=$2;
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my $full=$_;
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logmsg "GOT: ($1) $_\n";
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my $ok = $commandok{$FTPCMD};
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if($ok !~ /$state/) {
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print "500 $FTPCMD not OK in state: $state!\r\n";
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next;
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}
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my $newstate=$statechange{$FTPCMD};
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if($newstate eq "") {
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# remain in the same state
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}
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else {
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$state = $newstate;
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}
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my $text = $displaytext{$FTPCMD};
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if($text) {
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print "$text\r\n";
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}
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# see if the new state is a function caller.
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my $func = $commandfunc{$FTPCMD};
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if($func) {
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# it is!
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\&$func($FTPARG);
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}
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logmsg "set to state $state\n";
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} # while(1)
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close(Client);
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close(Client2);
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close(Server2);
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}
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