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-rwxr-xr-xtests/ftpserver.pl163
-rw-r--r--tests/server/sockfilt.c14
2 files changed, 144 insertions, 33 deletions
diff --git a/tests/ftpserver.pl b/tests/ftpserver.pl
index 474b4f293..729cbf7f3 100755
--- a/tests/ftpserver.pl
+++ b/tests/ftpserver.pl
@@ -148,13 +148,15 @@ my $ftplistparserstate;
my $ftptargetdir;
#**********************************************************************
-# when running a ftp server, global var datasockf_mode var is used to
-# keep info relative to the actual running state of the secondary or
-# data sockfilt process. 'none' represents that the data sockfilt is
-# not running. 'active' and 'passive' indicates that the data sockfilt
-# is running and specifies operational mode.
+# global variables used when running a ftp server to keep state info
+# relative to the secondary or data sockfilt process. Values of these
+# variables should only be modified using datasockf_state() sub, given
+# that they are closely related and relationship is a bit awkward.
#
-my $datasockf_mode = 'none';
+my $datasockf_state = 'STOPPED'; # see datasockf_state() sub
+my $datasockf_mode = 'none'; # ['none','active','passive']
+my $datasockf_runs = 'no'; # ['no','yes']
+my $datasockf_conn = 'no'; # ['no','yes']
#**********************************************************************
# global vars used for signal handling
@@ -329,10 +331,21 @@ sub sendcontrol {
}
}
-# Send data to the client on the data stream
-
+#**********************************************************************
+# Send data to the FTP client on the data stream when data connection
+# is actually established. Given that this sub should only be called
+# when a data connection is supposed to be established, calling this
+# without a data connection is an indication of weak logic somewhere.
+#
sub senddata {
my $l;
+ if($datasockf_conn eq 'no') {
+ logmsg "WARNING: Detected data sending attempt without DATA channel\n";
+ foreach $l (@_) {
+ logmsg "WARNING: Data swallowed: $l\n"
+ }
+ return;
+ }
foreach $l (@_) {
if(!$datadelay) {
# spit it all out at once
@@ -498,7 +511,7 @@ sub close_dataconn {
logmsg "=====> Closed $datasockf_mode DATA connection\n";
- $datasockf_mode = 'none';
+ datasockf_state('STOPPED');
}
################
@@ -817,6 +830,11 @@ my @ftpdir=("total 20\r\n",
"drwxrwxrwx 2 98 1 512 Oct 30 14:33 pub\r\n",
"dr-xr-xr-x 5 0 1 512 Oct 1 1997 usr\r\n");
+ if($datasockf_conn eq 'no') {
+ sendcontrol "503 data channel not established\r\n";
+ return 0;
+ }
+
if($ftplistparserstate) {
@ftpdir = ftp_contentlist($ftptargetdir);
}
@@ -832,6 +850,12 @@ my @ftpdir=("total 20\r\n",
sub NLST_ftp {
my @ftpdir=("file", "with space", "fake", "..", " ..", "funny", "README");
+
+ if($datasockf_conn eq 'no') {
+ sendcontrol "503 data channel not established\r\n";
+ return 0;
+ }
+
logmsg "pass NLST data on data connection\n";
for(@ftpdir) {
senddata "$_\r\n";
@@ -935,6 +959,11 @@ sub SIZE_ftp {
sub RETR_ftp {
my ($testno) = @_;
+ if($datasockf_conn eq 'no') {
+ sendcontrol "503 data channel not established\r\n";
+ return 0;
+ }
+
if($ftplistparserstate) {
my @content = wildcard_getfile($ftptargetdir, $testno);
if($content[0] == -1) {
@@ -1029,6 +1058,11 @@ sub STOR_ftp {
my $filename = "log/upload.$testno";
+ if($datasockf_conn eq 'no') {
+ sendcontrol "503 data channel not established\r\n";
+ return 0;
+ }
+
logmsg "STOR test number $testno in $filename\n";
sendcontrol "125 Gimme gimme gimme!\r\n";
@@ -1080,13 +1114,14 @@ sub STOR_ftp {
sub PASV_ftp {
my ($arg, $cmd)=@_;
my $pasvport;
+ my $bindonly = ($nodataconn) ? '--bindonly' : '';
# kill previous data connection sockfilt when alive
- if($datasockf_mode ne 'none') {
+ if($datasockf_runs eq 'yes') {
killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data');
logmsg "DATA sockfilt for $datasockf_mode data channel killed\n";
- $datasockf_mode = 'none';
}
+ datasockf_state('STOPPED');
logmsg "====> Passive DATA channel requested by client\n";
@@ -1094,12 +1129,17 @@ sub PASV_ftp {
# We fire up a new sockfilt to do the data transfer for us.
my $datasockfcmd = "./server/sockfilt " .
- "--ipv$ipvnum --port 0 " .
+ "--ipv$ipvnum $bindonly --port 0 " .
"--pidfile \"$datasockf_pidfile\" " .
"--logfile \"$datasockf_logfile\"";
$slavepid = open2(\*DREAD, \*DWRITE, $datasockfcmd);
- $datasockf_mode = 'passive';
+ if($nodataconn) {
+ datasockf_state('PASSIVE_NODATACONN');
+ }
+ else {
+ datasockf_state('PASSIVE');
+ }
print STDERR "$datasockfcmd\n" if($verbose);
@@ -1111,7 +1151,7 @@ sub PASV_ftp {
logmsg "DATA sockfilt said: FAIL\n";
logmsg "DATA sockfilt for passive data channel failed\n";
logmsg "DATA sockfilt not running\n";
- $datasockf_mode = 'none';
+ datasockf_state('STOPPED');
sendcontrol "500 no free ports!\r\n";
return;
}
@@ -1121,14 +1161,14 @@ sub PASV_ftp {
logmsg "DATA sockfilt killed now\n";
killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data');
logmsg "DATA sockfilt not running\n";
- $datasockf_mode = 'none';
+ datasockf_state('STOPPED');
sendcontrol "500 no free ports!\r\n";
return;
}
logmsg "DATA sockfilt for passive data channel started (pid $slavepid)\n";
- # Find out what port we listen on
+ # Find out on what port we listen on or have bound
my $i;
print DWRITE "PORT\n";
@@ -1160,20 +1200,18 @@ sub PASV_ftp {
logmsg "DATA sockfilt killed now\n";
killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data');
logmsg "DATA sockfilt not running\n";
- $datasockf_mode = 'none';
+ datasockf_state('STOPPED');
sendcontrol "500 no free ports!\r\n";
return;
}
- logmsg "DATA sockfilt for passive data channel listens on port ".
- "$pasvport\n";
-
if($nodataconn) {
- logmsg "DATA sockfilt for passive data channel killed ".
- "(NODATACONN)\n";
- killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data');
- logmsg "DATA sockfilt not running\n";
- $datasockf_mode = 'none';
+ logmsg "DATA sockfilt for passive data channel (NODATACONN) ".
+ "bound on port $pasvport\n";
+ }
+ else {
+ logmsg "DATA sockfilt for passive data channel listens on port ".
+ "$pasvport\n";
}
if($cmd ne "EPSV") {
@@ -1230,7 +1268,7 @@ sub PASV_ftp {
logmsg "DATA sockfilt killed now\n";
killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data');
logmsg "DATA sockfilt not running\n";
- $datasockf_mode = 'none';
+ datasockf_state('STOPPED');
return;
}
else {
@@ -1251,11 +1289,11 @@ sub PORT_ftp {
my $addr;
# kill previous data connection sockfilt when alive
- if($datasockf_mode ne 'none') {
+ if($datasockf_runs eq 'yes') {
killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data');
logmsg "DATA sockfilt for $datasockf_mode data channel killed\n";
- $datasockf_mode = 'none';
}
+ datasockf_state('STOPPED');
logmsg "====> Active DATA channel requested by client\n";
@@ -1299,18 +1337,24 @@ sub PORT_ftp {
if($nodataconn) {
logmsg "DATA sockfilt for active data channel not started ".
"(NODATACONN)\n";
+ datasockf_state('ACTIVE_NODATACONN');
+ logmsg "====> Active DATA channel not established\n";
# client shall timeout awaiting connection from server
return;
}
elsif($nodataconn425) {
logmsg "DATA sockfilt for active data channel not started ".
"(NODATACONN425)\n";
+ datasockf_state('ACTIVE_NODATACONN');
+ logmsg "====> Active DATA channel not established\n";
sendcontrol "425 Can't open data connection\r\n";
return;
}
elsif($nodataconn421) {
logmsg "DATA sockfilt for active data channel not started ".
"(NODATACONN421)\n";
+ datasockf_state('ACTIVE_NODATACONN');
+ logmsg "====> Active DATA channel not established\n";
sendcontrol "421 Connection timed out\r\n";
return;
}
@@ -1324,7 +1368,7 @@ sub PORT_ftp {
"--logfile \"$datasockf_logfile\"";
$slavepid = open2(\*DREAD, \*DWRITE, $datasockfcmd);
- $datasockf_mode = 'active';
+ datasockf_state('ACTIVE');
print STDERR "$datasockfcmd\n" if($verbose);
@@ -1336,7 +1380,7 @@ sub PORT_ftp {
logmsg "DATA sockfilt said: FAIL\n";
logmsg "DATA sockfilt for active data channel failed\n";
logmsg "DATA sockfilt not running\n";
- $datasockf_mode = 'none';
+ datasockf_state('STOPPED');
# client shall timeout awaiting connection from server
return;
}
@@ -1346,7 +1390,7 @@ sub PORT_ftp {
logmsg "DATA sockfilt killed now\n";
killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data');
logmsg "DATA sockfilt not running\n";
- $datasockf_mode = 'none';
+ datasockf_state('STOPPED');
# client shall timeout awaiting connection from server
return;
}
@@ -1359,6 +1403,59 @@ sub PORT_ftp {
}
#**********************************************************************
+# datasockf_state is used to change variables that keep state info
+# relative to the FTP secondary or data sockfilt process as soon as
+# one of the five possible stable states is reached. Variables that
+# are modified by this sub may be checked independently but should
+# not be changed except by calling this sub.
+#
+sub datasockf_state {
+ my $state = $_[0];
+
+ if($state eq 'STOPPED') {
+ # Data sockfilter initial state, not running,
+ # not connected and not used.
+ $datasockf_state = $state;
+ $datasockf_mode = 'none';
+ $datasockf_runs = 'no';
+ $datasockf_conn = 'no';
+ }
+ elsif($state eq 'PASSIVE') {
+ # Data sockfilter accepted connection from client.
+ $datasockf_state = $state;
+ $datasockf_mode = 'passive';
+ $datasockf_runs = 'yes';
+ $datasockf_conn = 'yes';
+ }
+ elsif($state eq 'ACTIVE') {
+ # Data sockfilter has connected to client.
+ $datasockf_state = $state;
+ $datasockf_mode = 'active';
+ $datasockf_runs = 'yes';
+ $datasockf_conn = 'yes';
+ }
+ elsif($state eq 'PASSIVE_NODATACONN') {
+ # Data sockfilter bound port without listening,
+ # client won't be able to establish data connection.
+ $datasockf_state = $state;
+ $datasockf_mode = 'passive';
+ $datasockf_runs = 'yes';
+ $datasockf_conn = 'no';
+ }
+ elsif($state eq 'ACTIVE_NODATACONN') {
+ # Data sockfilter does not even run,
+ # client awaits data connection from server in vain.
+ $datasockf_state = $state;
+ $datasockf_mode = 'active';
+ $datasockf_runs = 'no';
+ $datasockf_conn = 'no';
+ }
+ else {
+ die "Internal error. Unknown datasockf state: $state!";
+ }
+}
+
+#**********************************************************************
# customize configures test server operation for each curl test, reading
# configuration commands/parameters from server commands file each time
# a new client control connection is established with the test server.
@@ -1581,11 +1678,11 @@ logmsg("logged pid $$ in $pidfile\n");
while(1) {
# kill previous data connection sockfilt when alive
- if($datasockf_mode ne 'none') {
+ if($datasockf_runs eq 'yes') {
killsockfilters($proto, $ipvnum, $idnum, $verbose, 'data');
logmsg "DATA sockfilt for $datasockf_mode data channel killed now\n";
- $datasockf_mode = 'none';
}
+ datasockf_state('STOPPED');
#
# We read 'sockfilt' commands.
diff --git a/tests/server/sockfilt.c b/tests/server/sockfilt.c
index 2731348ea..823b90161 100644
--- a/tests/server/sockfilt.c
+++ b/tests/server/sockfilt.c
@@ -123,6 +123,7 @@
const char *serverlogfile = DEFAULT_LOGFILE;
static bool verbose = FALSE;
+static bool bind_only = FALSE;
#ifdef ENABLE_IPV6
static bool use_ipv6 = FALSE;
#endif
@@ -807,6 +808,12 @@ static curl_socket_t sockdaemon(curl_socket_t sock,
}
}
+ /* bindonly option forces no listening */
+ if(bind_only) {
+ logmsg("instructed to bind port without listening");
+ return sock;
+ }
+
/* start accepting connections */
rc = listen(sock, 5);
if(0 != rc) {
@@ -875,6 +882,10 @@ int main(int argc, char *argv[])
#endif
arg++;
}
+ else if(!strcmp("--bindonly", argv[arg])) {
+ bind_only = TRUE;
+ arg++;
+ }
else if(!strcmp("--port", argv[arg])) {
arg++;
if(argc>arg) {
@@ -923,6 +934,7 @@ int main(int argc, char *argv[])
" --pidfile [file]\n"
" --ipv4\n"
" --ipv6\n"
+ " --bindonly\n"
" --port [port]\n"
" --connect [port]\n"
" --addr [address]");
@@ -1006,6 +1018,8 @@ int main(int argc, char *argv[])
if(connectport)
logmsg("Connected to port %hu", connectport);
+ else if(bind_only)
+ logmsg("Bound without listening on port %hu", port);
else
logmsg("Listening on port %hu", port);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 02:01:36 +0000