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curl/tests/ftpserver.pl
Daniel Stenberg 85f9e6c4b9 basic signal handler for sigint and sigkill
2005-04-28 21:06:17 +00:00

880 lines
24 KiB
Perl
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#!/usr/bin/perl
#***************************************************************************
# _ _ ____ _
# Project ___| | | | _ \| |
# / __| | | | |_) | |
# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
# Copyright (C) 1998 - 2005, Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at http://curl.haxx.se/docs/copyright.html.
#
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
# copies of the Software, and permit persons to whom the Software is
# furnished to do so, under the terms of the COPYING file.
#
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
#
# $Id$
###########################################################################
# This is the FTP server designed for the curl test suite.
#
# It is meant to exercise curl, it is not meant to be a fully working
# or even very standard compliant server.
#
# You may optionally specify port on the command line, otherwise it'll
# default to port 8921.
#
# All socket/network/TCP related stuff is done by the 'sockfilt' program.
#
use strict;
use IPC::Open2;
require "getpart.pm";
require "ftp.pm";
my $ftpdnum="";
# open and close each time to allow removal at any time
sub logmsg {
my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) =
localtime(time);
open(FTPLOG, ">>log/ftpd$ftpdnum.log");
printf FTPLOG ("%02d:%02d:%02d ", $hour, $min, $sec);
print FTPLOG @_;
close(FTPLOG);
}
sub ftpmsg {
# append to the server.input file
open(INPUT, ">>log/server$ftpdnum.input") ||
logmsg "failed to open log/server$ftpdnum.input\n";
print INPUT @_;
close(INPUT);
# use this, open->print->close system only to make the file
# open as little as possible, to make the test suite run
# better on windows/cygwin
}
my $verbose=0; # set to 1 for debugging
my $retrweirdo=0;
my $retrnosize=0;
my $srcdir=".";
my $nosave=0;
my $controldelay=0; # set to 1 to delay the control connect data sending to
# test that curl deals with that nicely
my $slavepid; # for the DATA connection sockfilt slave process
my $ipv6;
my $ext; # append to log/pid file names
my $grok_eprt;
my $port = 8921; # just a default
do {
if($ARGV[0] eq "-v") {
$verbose=1;
}
elsif($ARGV[0] eq "-s") {
$srcdir=$ARGV[1];
shift @ARGV;
}
elsif($ARGV[0] eq "--id") {
$ftpdnum=$ARGV[1];
shift @ARGV;
}
elsif($ARGV[0] eq "--ipv6") {
$ipv6="--ipv6";
$ext="ipv6";
$grok_eprt = 1;
}
elsif($ARGV[0] eq "--port") {
$port = $ARGV[1];
shift @ARGV;
}
} while(shift @ARGV);
sub catch_zap {
my $signame = shift;
print STDERR "ftpserver.pl received SIG$signame, exiting\n";
ftpkillslaves(1);
die "Somebody sent me a SIG$signame";
}
$SIG{INT} = \&catch_zap;
$SIG{KILL} = \&catch_zap;
my $sfpid;
sub startsf {
my $cmd="./server/sockfilt --port $port --logfile log/sockctrl$ftpdnum$ext.log --pidfile .sockfilt$ftpdnum$ext.pid $ipv6";
$sfpid = open2(\*SFREAD, \*SFWRITE, $cmd);
print STDERR "$cmd\n" if($verbose);
print SFWRITE "PING\n";
my $pong = <SFREAD>;
if($pong !~ /^PONG/) {
logmsg "Failed sockfilt command: $cmd\n";
kill(9, $sfpid);
die "Failed to start sockfilt!";
}
open(STDIN, "<&SFREAD") || die "can't dup client to stdin";
open(STDOUT, ">&SFWRITE") || die "can't dup client to stdout";
}
startsf();
logmsg sprintf("FTP server started on port IPv%d/$port\n",
$ipv6?6:4);
open(PID, ">.ftp$ftpdnum.pid");
print PID $$;
close(PID);
sub sockfilt {
my $l;
foreach $l (@_) {
printf "DATA\n%04x\n", length($l);
print $l;
}
}
# Send data to the client on the control stream, which happens to be plain
# stdout.
sub sendcontrol {
if(!$controldelay) {
# spit it all out at once
sockfilt @_;
}
else {
my $a = join("", @_);
my @a = split("", $a);
for(@a) {
sockfilt $_;
select(undef, undef, undef, 0.01);
}
}
}
# Send data to the client on the data stream
sub senddata {
my $l;
foreach $l (@_) {
printf DWRITE "DATA\n%04x\n", length($l);
print DWRITE $l;
}
}
# USER is ok in fresh state
my %commandok = (
'USER' => 'fresh',
'PASS' => 'passwd',
'PASV' => 'loggedin|twosock',
'EPSV' => 'loggedin|twosock',
'PORT' => 'loggedin|twosock',
'EPRT' => 'loggedin|twosock',
'TYPE' => 'loggedin|twosock',
'LIST' => 'twosock',
'NLST' => 'twosock',
'RETR' => 'twosock',
'STOR' => 'twosock',
'APPE' => 'twosock',
'REST' => 'twosock',
'ACCT' => 'loggedin',
'CWD' => 'loggedin|twosock',
'SYST' => 'loggedin',
'SIZE' => 'loggedin|twosock',
'PWD' => 'loggedin|twosock',
'MKD' => 'loggedin|twosock',
'QUIT' => 'loggedin|twosock',
'RNFR' => 'loggedin|twosock',
'RNTO' => 'loggedin|twosock',
'DELE' => 'loggedin|twosock',
'MDTM' => 'loggedin|twosock',
'NOOP' => 'loggedin|twosock',
);
# initially, we're in 'fresh' state
my %statechange = ( 'USER' => 'passwd', # USER goes to passwd state
'PASS' => 'loggedin', # PASS goes to loggedin state
'PORT' => 'twosock', # PORT goes to twosock
'EPRT' => 'twosock', # EPRT goes to twosock
'PASV' => 'twosock', # PASV goes to twosock
'EPSV' => 'twosock', # EPSV goes to twosock
);
# this text is shown before the function specified below is run
my %displaytext = ('USER' => '331 We are happy you popped in!',
'PASS' => '230 Welcome you silly person',
'PORT' => '200 You said PORT - I say FINE',
'TYPE' => '200 I modify TYPE as you wanted',
'LIST' => '150 here comes a directory',
'NLST' => '150 here comes a directory',
'CWD' => '250 CWD command successful.',
'SYST' => '215 UNIX Type: L8', # just fake something
'QUIT' => '221 bye bye baby', # just reply something
'PWD' => '257 "/nowhere/anywhere" is current directory',
'MKD' => '257 Created your requested directory',
'REST' => '350 Yeah yeah we set it there for you',
'DELE' => '200 OK OK OK whatever you say',
'RNFR' => '350 Received your order. Please provide more',
'RNTO' => '250 Ok, thanks. File renaming completed.',
'NOOP' => '200 Yes, I\'m very good at doing nothing.',
);
# callback functions for certain commands
my %commandfunc = ( 'PORT' => \&PORT_command,
'EPRT' => \&PORT_command,
'LIST' => \&LIST_command,
'NLST' => \&NLST_command,
'PASV' => \&PASV_command,
'EPSV' => \&PASV_command,
'RETR' => \&RETR_command,
'SIZE' => \&SIZE_command,
'REST' => \&REST_command,
'STOR' => \&STOR_command,
'APPE' => \&STOR_command, # append looks like upload
'MDTM' => \&MDTM_command,
);
sub close_dataconn {
my ($closed)=@_; # non-zero if already disconnected
if(!$closed) {
logmsg "time to kill the data connection\n";
print DWRITE "DISC\n";
my $i;
sysread DREAD, $i, 5;
}
else {
logmsg "data connection already disconnected\n";
}
logmsg "time to quit sockfilt for data\n";
print DWRITE "QUIT\n";
logmsg "told data slave to die (pid $slavepid)\n";
waitpid $slavepid, 0;
$slavepid=0;
logmsg "=====> Closed data connection\n";
}
my $rest=0;
sub REST_command {
$rest = $_[0];
logmsg "Set REST position to $rest\n"
}
sub LIST_command {
# print "150 ASCII data connection for /bin/ls (193.15.23.1,59196) (0 bytes)\r\n";
# this is a built-in fake-dir ;-)
my @ftpdir=("total 20\r\n",
"drwxr-xr-x 8 98 98 512 Oct 22 13:06 .\r\n",
"drwxr-xr-x 8 98 98 512 Oct 22 13:06 ..\r\n",
"drwxr-xr-x 2 98 98 512 May 2 1996 .NeXT\r\n",
"-r--r--r-- 1 0 1 35 Jul 16 1996 README\r\n",
"lrwxrwxrwx 1 0 1 7 Dec 9 1999 bin -> usr/bin\r\n",
"dr-xr-xr-x 2 0 1 512 Oct 1 1997 dev\r\n",
"drwxrwxrwx 2 98 98 512 May 29 16:04 download.html\r\n",
"dr-xr-xr-x 2 0 1 512 Nov 30 1995 etc\r\n",
"drwxrwxrwx 2 98 1 512 Oct 30 14:33 pub\r\n",
"dr-xr-xr-x 5 0 1 512 Oct 1 1997 usr\r\n");
logmsg "pass LIST data on data connection\n";
for(@ftpdir) {
senddata $_;
}
close_dataconn(0);
logmsg "done passing data\n";
sendcontrol "226 ASCII transfer complete\r\n";
return 0;
}
sub NLST_command {
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_command {
my $testno = $_[0];
loadtest("$srcdir/data/test$testno");
logmsg "MDTM $testno\n";
my @data = getpart("reply", "mdtm");
my $reply = $data[0];
chomp $reply;
if($reply <0) {
sendcontrol "550 $testno: no such file.\r\n";
logmsg "MDTM $testno: no such file\n";
}
elsif($reply) {
sendcontrol "$reply\r\n";
logmsg "MDTM $testno returned $reply\n";
}
else {
sendcontrol "500 MDTM: no such command.\r\n";
logmsg "MDTM: no such command\n";
}
return 0;
}
sub SIZE_command {
my $testno = $_[0];
loadtest("$srcdir/data/test$testno");
logmsg "SIZE file \"$testno\"\n";
if($testno eq "verifiedserver") {
my $response = "WE ROOLZ: $$\r\n";
my $size = length($response);
sendcontrol "213 $size\r\n";
logmsg "SIZE $testno returned $size\n";
return 0;
}
my @data = getpart("reply", "size");
my $size = $data[0];
if($size) {
if($size > -1) {
sendcontrol "213 $size\r\n";
logmsg "SIZE $testno returned $size\n";
}
else {
sendcontrol "550 $testno: No such file or directory.\r\n";
logmsg "SIZE $testno: no such file\n";
}
}
else {
$size=0;
@data = getpart("reply", "data");
for(@data) {
$size += length($_);
}
if($size) {
sendcontrol "213 $size\r\n";
logmsg "SIZE $testno returned $size\n";
}
else {
sendcontrol "550 $testno: No such file or directory.\r\n";
logmsg "SIZE $testno: no such file\n";
}
}
return 0;
}
sub RETR_command {
my ($testno) = @_;
logmsg "RETR file \"$testno\"\n";
if($testno =~ /^verifiedserver$/) {
# this is the secret command that verifies that this actually is
# the curl test server
my $response = "WE ROOLZ: $$\r\n";
my $len = length($response);
sendcontrol "150 Binary junk ($len bytes).\r\n";
logmsg "pass our pid on the data connection\n";
senddata "WE ROOLZ: $$\r\n";
close_dataconn(0);
logmsg "Data sent, sending a 226-reponse now\n";
sendcontrol "226 File transfer complete\r\n";
if($verbose) {
print STDERR "FTPD: We returned proof we are the test server\n";
}
logmsg "we returned proof that we are the test server\n";
return 0;
}
$testno =~ s/^([^0-9]*)//;
loadtest("$srcdir/data/test$testno");
my @data = getpart("reply", "data");
my $size=0;
for(@data) {
$size += length($_);
}
my %hash = getpartattr("reply", "data");
if($size || $hash{'sendzero'}) {
if($rest) {
# move read pointer forward
$size -= $rest;
logmsg "REST $rest was removed from size, makes $size left\n";
$rest = 0; # reset REST offset again
}
if($retrweirdo) {
sendcontrol "150 Binary data connection for $testno () ($size bytes).\r\n",
"226 File transfer complete\r\n";
logmsg "150+226 in one shot!\n";
logmsg "pass RETR data on data connection\n";
for(@data) {
my $send = $_;
senddata $send;
}
close_dataconn(0);
$retrweirdo=0; # switch off the weirdo again!
}
else {
my $sz = "($size bytes)";
if($retrnosize) {
$sz = "size?";
}
sendcontrol "150 Binary data connection for $testno () $sz.\r\n";
logmsg "150 Binary data connection for $testno () $sz.\n";
logmsg "pass RETR data on data connection\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";
logmsg "550 $testno: no such file\n";
}
return 0;
}
sub STOR_command {
my $testno=$_[0];
my $filename = "log/upload.$testno";
logmsg "STOR test number $testno in $filename\n";
sendcontrol "125 Gimme gimme gimme!\r\n";
logmsg "retrieve STOR data on data connection\n";
open(FILE, ">$filename") ||
return 0; # failed to open output
my $line;
my $ulsize=0;
my $disc=0;
while (5 == (sysread DREAD, $line, 5)) {
logmsg "command from sockfilt: $line";
if($line eq "DATA\n") {
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!
logmsg "DISC means disconnect!\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 $ulsize bytes upload\n";
sendcontrol "226 File transfer complete\r\n";
return 0;
}
sub PASV_command {
my ($arg, $cmd)=@_;
my $pasvport;
# 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$ext.log --pidfile .sockdata$ftpdnum$ext.pid $ipv6");
print DWRITE "PING\n";
my $pong = <DREAD>;
if($pong !~ /^PONG/) {
kill(9, $slavepid);
sendcontrol "500 no free ports!\r\n";
logmsg "failed to run sockfilt for data connection\n";
return 0;
}
logmsg "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(DREAD, $i, 5) || die;
# READ the response size
sysread(DREAD, $i, 5) || die;
my $size = hex($i);
# READ the response data
sysread(DREAD, $i, $size) || die;
# The data is in the format
# IPvX/NNN
if($i =~ /IPv(\d)\/(\d+)/) {
# FIX: deal with IP protocol version
$pasvport = $2;
}
if($cmd ne "EPSV") {
# PASV reply
logmsg "replying to a $cmd command, waiting on port $pasvport\n";
sendcontrol sprintf("227 Entering Passive Mode (127,0,0,1,%d,%d)\n",
($pasvport/256), ($pasvport%256));
}
else {
# EPSV reply
logmsg "replying to a $cmd command, waiting on port $pasvport\n";
sendcontrol sprintf("229 Entering Passive Mode (|||%d|)\n", $pasvport);
}
eval {
local $SIG{ALRM} = sub { die "alarm\n" };
alarm 5; # assume swift operations
# Wait for 'CNCT'
my $input = <DREAD>;
if($input !~ /^CNCT/) {
# we wait for a connected client
next;
}
logmsg "====> Client DATA connect\n";
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+)/) {
logmsg "bad EPRT-line: $arg\n";
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 {
logmsg "got a $cmd line we don't like\n";
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 $pong = <DREAD>;
if($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";
$retrnosize=1;
}
elsif($_ =~ /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;
eval {
local $SIG{ALRM} = sub { die "alarm\n" };
alarm 5; # just in case things go bad
$input = <STDIN>;
alarm 0;
};
if ($@) {
# timed out
logmsg "reading stdin timed out\n";
}
if($input !~ /^CNCT/) {
# we wait for a connected client
if(!length($input)) {
# it probably died, restart it
kill(9, $sfpid);
waitpid $sfpid, 0;
startsf();
logmsg "restarted sockfilt\n";
}
else {
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(STDIN, $i, 5) || die;
if($i !~ /^DATA/) {
logmsg "sockfilt said $i";
if($i =~ /^DISC/) {
# disconnect
last;
}
next;
}
# SIZE of data
sysread(STDIN, $i, 5) || die;
my $size = hex($i);
# data
sysread STDIN, $_, $size;
ftpmsg $_;
# Remove trailing CRLF.
s/[\n\r]+$//;
unless (m/^([A-Z]{3,4})\s?(.*)/i) {
sendcontrol "500 '$_': command not understood.\r\n";
logmsg "unknown crap received: $_, bailing out hard\n";
last;
}
my $FTPCMD=$1;
my $FTPARG=$2;
my $full=$_;
logmsg "Received \"$full\"\n";
if($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($delay) {
# just go sleep this many seconds!
sleep($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}="";
}
logmsg "$FTPCMD made to send '$text'\n";
}
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;
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