ftp tests: provide LIST responses in the test file itself

Previously LIST always returned a fixed hardcoded list that the ftp
server code knew about, mostly since the server didn't get any test case
number in the LIST scenario. Starting now, doing a CWD to a directory
named test-[number] will make the test server remember that number and
consider it a test case so that a subsequent LIST command will send the
<data> section of that test case back.

It allows LIST tests to be made more similar to how all other tests
work.

Test 100 was updated to provide its own directory listing.

tests/FILEFORMAT

@@ -59,6 +59,12 @@ transfers.
 of data encoded with base64. It is the only way a test case can contain binary
 data. (This attribute can in fact be used on any section, but it doesn't make
 much sense for other sections than "data").
+
+For FTP file listings, the <data> section will be used *only* if you make sure
+that there has been a CWD done first to a directory named 'test-[num]' where
+[num] is the test case number. Otherwise the ftp server can't know from which
+test file to load the list content.
+
 </data>
 <dataNUM>
 Send back this contents instead of the <data> one. The num is set by:

tests/data/test100

@@ -11,11 +11,11 @@ LIST
 <reply>
 # When doing LIST, we get the default list output hard-coded in the test
 # FTP server
-<datacheck>
+<data>
 total 20
 drwxr-xr-x   8 98       98           512 Oct 22 13:06 .
 drwxr-xr-x   8 98       98           512 Oct 22 13:06 ..
-drwxr-xr-x   2 98       98           512 May  2  1996 .NeXT
+drwxr-xr-x   2 98       98           512 May  2  1996 curl-releases
 -r--r--r--   1 0        1             35 Jul 16  1996 README
 lrwxrwxrwx   1 0        1              7 Dec  9  1999 bin -> usr/bin
 dr-xr-xr-x   2 0        1            512 Oct  1  1997 dev
@@ -23,7 +23,7 @@ drwxrwxrwx   2 98       98           512 May 29 16:04 download.html
 dr-xr-xr-x   2 0        1            512 Nov 30  1995 etc
 drwxrwxrwx   2 98       1            512 Oct 30 14:33 pub
 dr-xr-xr-x   5 0        1            512 Oct  1  1997 usr
-</datacheck>
+</data>
 </reply>
 
 #
@@ -36,7 +36,7 @@ ftp
 FTP dir list PASV
  </name>
  <command>
-ftp://%HOSTIP:%FTPPORT/
+ftp://%HOSTIP:%FTPPORT/test-100/
 </command>
 </client>
 
@@ -47,6 +47,7 @@ ftp://%HOSTIP:%FTPPORT/
 USER anonymous
 PASS ftp@example.com
 PWD
+CWD test-100
 EPSV
 TYPE A
 LIST

tests/ftpserver.pl

@@ -6,7 +6,7 @@
 #                            | (__| |_| |  _ <| |___
 #                             \___|\___/|_| \_\_____|
 #
-# Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al.
+# Copyright (C) 1998 - 2014, 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
@@ -78,7 +78,7 @@ my $ipvnum = 4;     # server IPv number (4 or 6)
 my $proto = 'ftp';  # default server protocol
 my $srcdir;         # directory where ftpserver.pl is located
 my $srvrname;       # server name for presentation purposes
-
+my $cwd_testno;     # test case numbers extracted from CWD command
 my $path   = '.';
 my $logdir = $path .'/log';
 
@@ -152,7 +152,7 @@ my %delayreply;    #
 # $ftptargetdir is keeping the fake "name" of LIST directory.
 #
 my $ftplistparserstate;
-my $ftptargetdir;
+my $ftptargetdir="";
 
 #**********************************************************************
 # global variables used when running a ftp server to keep state info
@@ -2078,7 +2078,10 @@ sub switch_directory_goto {
 sub switch_directory {
     my $target_dir = $_[0];
 
-    if($target_dir eq "/") {
+    if($target_dir =~ /^test-(\d+)/) {
+        $cwd_testno = $1;
+    }
+    elsif($target_dir eq "/") {
         $ftptargetdir = "/";
     }
     else {
@@ -2111,7 +2114,7 @@ sub PWD_ftp {
 }
 
 sub LIST_ftp {
-  #  print "150 ASCII data connection for /bin/ls (193.15.23.1,59196) (0 bytes)\r\n";
+    #  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",
@@ -2150,8 +2153,23 @@ my @ftpdir=("total 20\r\n",
     }
 
     logmsg "pass LIST data on data connection\n";
-    for(@ftpdir) {
-        senddata $_;
+
+    if($cwd_testno) {
+        loadtest("$srcdir/data/test$cwd_testno");
+
+        my @data = getpart("reply", "data");
+        for(@data) {
+            my $send = $_;
+            logmsg "send $send as data\n";
+            senddata $send;
+        }
+        $cwd_testno = 0; # forget it again
+    }
+    else {
+        # old hard-coded style
+        for(@ftpdir) {
+            senddata $_;
+        }
     }
     close_dataconn(0);
     sendcontrol "226 ASCII transfer complete\r\n";