server/ext/login.ext

#! perl

# login handling

use Fcntl;
use Coro::AIO;

my $PLAYERDIR = sprintf "%s/%s", cf::localdir, cf::playerdir;

# paranoia function to overwrite a string-in-place
sub nuke_str {
   substr $_[0], 0, (length $_[0]), "x" x length $_[0]
}

sub query {
   my ($ns, $flags, $text) = @_;

   my $current = $Coro::current;
   $ns->query ($flags, $text, sub { $current->ready; $current = $_[0]; });
   Coro::schedule while ref $current;

   $current
}

sub can_cleanup {
   my ($playerfile, $mtime) = @_;

   my $age = time - $mtime;
   my $level = $playerfile =~ /^level (\d+)$/m ? $1 : return;

   ($level <= 3 && $age > 7 * 86400)            # 7 days for level 0..3
   || ($level <= 9 && $age > 90 * 86400)        # 3 months for level 4..9
   || ($level <= 20 && $age > 180 * 86400)      # 6 months for level 10..20
   || $age > 700 * 86400                        # 2 years for everybody else
}

sub check_playing {
   my ($ns, $user) = @_;

   return unless cf::player::find_active $user;

   $ns->send_drawinfo (
      "That player is already logged in on this server. "
    . "If you want to create a new player, choose another name. "
    . "If you are already a registered player, make sure nobody "
    . "else is using your account at this time. If you lost your conenction "
    . "then the server will likely timeout within a minute. If you still "
    . "cannot log-in after a minute, you are still logged in. Make sure "
    . "you do not have another client running. If you use windows, reboot, "
    . "this will fix anything.",
      cf::NDI_RED
   );

   1
}

sub check_clean_save {
   my ($pl) = @_;

   unless (delete $pl->{clean_save}) {
      #d#TODO
   }
}

# delete a player directory, be non-blocking AND synchronous...
# (thats hard, so we crap out and fork).
sub nuke_playerdir {
   my ($user) = @_;

   aio_stat "$PLAYERDIR/$user";
   system "cd \Q$PLAYERDIR\E "
        . "&& mv \Q$user\E ~\Q$Coro::current\E~deleting~ 2>/dev/null "
        . "&& (rm -rf ~\Q$Coro::current\E~deleting~ &)";
}

sub addme {
   my ($ns) = @_;

   $ns->destroy if $ns->pl;

   $ns->async (sub {
      my ($user, $pass);

      $ns->send_packet ("addme_success");

      for (;;) {
         $ns->send_drawinfo (
            "Please enter your username now. If you are a new user, "
          . "make one up that describes your character best. "
          . "Only letters and digits are allowed, though.",
            cf::NDI_BLUE
         );

         # read username
         while () {
            $user = query $ns, 0, "What is your name?\n:";

            if ($cf::LOGIN_LOCK{$user}) {
               $ns->send_drawinfo (
                  "That username is currently used in another login session. "
                . "Chose another, or wait till the other session has ended.",
                  cf::NDI_RED
               );
            } elsif ($user =~ /^[a-zA-Z0-9][a-zA-Z0-9\-_]{2,17}$/) {
               last;
            } else {
               $ns->send_drawinfo (
                  "Your username contains illegal characters "
                . "(only a-z, A-Z and 0-9 are allowed), "
                . "or is not between 3 and 18 characters in length.",
                  cf::NDI_RED
               );
            }
         }

         check_playing $ns, $user and next;

         $ns->send_drawinfo (
            "Welcome $user, please enter your password now. "
          . "New users should now choose a password. "
          . "Anything your client lets you enter is fine.",
            cf::NDI_BLUE
         );

         # read password
         while () {
            $pass = query $ns, cf::CS_QUERY_HIDEINPUT, "What is your password?\n:";
            last if $pass =~ /.../;
            $ns->send_drawinfo (
               "Try to use at least three characters as your password please, "
             . "that cannot be too much to ask for :)",
               cf::NDI_RED
            );
         }

         # lock this username for the remainder of this login session
         if ($cf::LOGIN_LOCK{$user}) {
            $ns->send_drawinfo (
               "That username is currently used in another login session. "
             . "Chose another, or wait till the other session has ended.",
               cf::NDI_RED
            );
            next;
         }
         local $cf::LOGIN_LOCK{$user} = 1;

         check_playing $ns, $user and next;

         # try to read the user file and check the password
         if (my $fh = aio_open cf::player::path $user, O_RDONLY, 0) {
            my $mtime = (stat $fh)[9];

            0 < aio_read $fh, 0, 16384, my $buf, 0 or next;
            $buf =~ /^password (\S+)$/m            or next;
            my $hash = $1;

            if ($hash eq crypt $pass, $hash) {
               nuke_str $pass;
               # password matches, wonderful
               my $pl = cf::player::find $user or next;
               $pl->connect ($ns);
               check_clean_save $pl;
               last;
            } elsif (can_cleanup $buf, $mtime) {
               Coro::Timer::sleep 1;

               $ns->send_drawinfo (
                  "Player exists, but password does not match. If this is your account, "
                . "please try again. If not, you can now decide to take over this account "
                . "because it has not been in-use for some time.",
                  cf::NDI_RED
               );

               #TODO: nuke_str
               (query $ns, cf::CS_QUERY_SINGLECHAR, "Delete existing account and create a new one (Y/N)?") =~ /^[yY]/
                  or next;

               # check if the file hasn't changed
               aio_stat cf::player::path $user and next;
               $mtime == (stat _)[9] or next;

               nuke_playerdir $user;

               # fall through to creation
            } else {
               nuke_str $pass;

               Coro::Timer::sleep 1;

               $ns->send_drawinfo (
                  "Wrong username or password. Please try again "
                . "(check for Numlock and other semi-obvious error sources).",
                  cf::NDI_RED
               );
               next;
            }
         }

         # the rest of this function is character creation

         # just to make sure nothing is left over
         nuke_playerdir $user;

         my $pass2 = query $ns, cf::CS_QUERY_HIDEINPUT, "Please type your password again.";

         if ($pass2 ne $pass) {
            nuke_str $pass;
            nuke_str $pass2;
            $ns->send_drawinfo (
               "The passwords do not match, please try again.",
               cf::NDI_RED
            );
            next;
         }

         nuke_str $pass2;

         my $pl = cf::player::new $user;
         $pl->password (crypt $pass, join '', ('.', '/', 0..9, 'A'..'Z', 'a'..'z')[rand 64, rand 64]);
         nuke_str $pass;
         $pl->connect ($ns);

         my $ob = $pl->ob;

         while () {
            $ob->update_stats;
            $pl->save_stats;

            my $res = query $ns, cf::CS_QUERY_SINGLECHAR,
                         "[y] to roll new stats [n] to use stats\n[1-7] [1-7] to swap stats.\nRoll again (y/n/1-7)?";

            if ($res =~ /^[Nn]/) {
               last;
            } elsif ($res > 0 && $res <= 7) {
               my $swap = query $ns, cf::CS_QUERY_SINGLECHAR, "Swap stat with (will not roll new stats) [1-7]?";

               if ($swap > 0 && $swap <= 7) {
                  $ob->swap_stats ($res - 1, $swap - 1);
               }
            } else {
               $ob->roll_stats;
            }
         }

         $ob->set_animation (2);
         $ob->add_statbonus;

         $ns->send_drawinfo ($ob->msg, cf::NDI_BLUE);
         $ns->send_packet (sprintf "query %d %s", cf::CS_QUERY_SINGLECHAR,
                      "Now choose a character.\nPress any key to change outlook.\nPress `d' when you're pleased.\n");

         $ns->state (cf::ST_CHANGE_CLASS);
         delete $pl->{deny_save};#d# too early

         last;
      }
   });
}

# "Quitting will delete your character PERMANENTLY. If you are sure you want to do this, then use the quit_character command instead of quit."
# "Quitting will delete your character.\nAre you sure you want to quit (y/n):"
# quit, quit_character, save

cf::object->attach (
   type     => cf::SAVEBED,
   on_apply => sub {
      my ($bed, $ob) = @_;

      return cf::override 0 unless $ob->type == cf::PLAYER;

      my $pl = $ob->pl;

      # update respawn position
      $pl->savebed ($bed->map->path, $bed->x, $bed->y);

      $pl->killer ("left");
      $ob->check_score;

      $ob->reply (undef, "In the future, you will wake up here when you die.");

      $pl->ns->query (cf::CS_QUERY_SINGLECHAR, "Do you want to continue playing (y/n)?", sub {
         if ($_[0] !~ /^[yY]/) {
            $pl->invoke (cf::EVENT_PLAYER_LOGOUT, 1);
            $pl->deactivate;
            $pl->ns->destroy;
         } else {
            cf::async {
               $pl->{clean_save} = 1;
               $pl->save;
            };
         }
      });
   },
);

cf::player->attach (
   on_login  => sub {
      my ($pl) = @_;
      my $name = $pl->ob->name;

      $_->ob->message ("$name has entered the game.", cf::NDI_DK_ORANGE | cf::NDI_UNIQUE) for cf::player::list;
   },
   on_logout => sub {
      my ($pl, $cleanly) = @_;
      my $name = $pl->ob->name;

      if ($cleanly) {
         $_->ob->message ("$name left the game.", cf::NDI_DK_ORANGE | cf::NDI_UNIQUE) for cf::player::list;
      } else {
         $_->ob->message ("$name uncerimoniously disconnected.", cf::NDI_DK_ORANGE | cf::NDI_UNIQUE) for cf::player::list;
      }
   },
);

cf::client->attach (
   on_addme => \&addme,
);

#############################################################################

our $SCHEDULE_INTERVAL  =   10; # time the player scheduler sleeps between runs
our $SWAP_TIMEOUT       =   30; # time after which an unused player is evicted form memory
our $SAVE_TIMEOUT       =   20; # save players every n seconds
our $SAVE_INTERVAL      =  0.1; # save at max. one player every $SAVE_INTERVAL

our $SCHEDULER = cf::async_ext {
   while () {
      Coro::Timer::sleep $SCHEDULE_INTERVAL;

      # this weird form of iteration over values is used because
      # the hash changes underneath us frequently, and for
      # keeps a direct reference to the value without (in 5.8 perls)
      # keeping a reference, so this is prone to crashes or worse.
      my @players = keys %cf::PLAYER;
      for (@players) {
         my $pl = $cf::PLAYER{$_}
            or next;
         $pl->valid or next;

         eval {
            if ($pl->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
               $pl->save;
               Coro::Timer::sleep $SAVE_INTERVAL;
            }
         };
         warn $@ if $@;
         Coro::cede;
      };
   }
};

$SCHEDULER->prio (1);

Revision:	1.11
Committed:	Sun Jan 7 02:39:14 2007 UTC (17 years, 4 months ago) by root
Branch:	MAIN
Changes since 1.10:	+66 -18 lines
Log Message:	""
#	User	Rev	Content
1	root	1.1	#! perl
2
3			# login handling
4
5			use Fcntl;
6			use Coro::AIO;
7
8			my $PLAYERDIR = sprintf "%s/%s", cf::localdir, cf::playerdir;
9
10	root	1.9	# paranoia function to overwrite a string-in-place
11			sub nuke_str {
12			substr $_[0], 0, (length $_[0]), "x" x length $_[0]
13			}
14	root	1.1
15			sub query {
16			my ($ns, $flags, $text) = @_;
17
18			my $current = $Coro::current;
19			$ns->query ($flags, $text, sub { $current->ready; $current = $_[0]; });
20			Coro::schedule while ref $current;
21
22			$current
23			}
24
25			sub can_cleanup {
26			my ($playerfile, $mtime) = @_;
27
28			my $age = time - $mtime;
29			my $level = $playerfile =~ /^level (\d+)$/m ? $1 : return;
30
31			($level <= 3 && $age > 7 * 86400) # 7 days for level 0..3
32			\|\| ($level <= 9 && $age > 90 * 86400) # 3 months for level 4..9
33			\|\| ($level <= 20 && $age > 180 * 86400) # 6 months for level 10..20
34			\|\| $age > 700 * 86400 # 2 years for everybody else
35			}
36
37			sub check_playing {
38			my ($ns, $user) = @_;
39
40	root	1.11	return unless cf::player::find_active $user;
41	root	1.1
42			$ns->send_drawinfo (
43			"That player is already logged in on this server. "
44			. "If you want to create a new player, choose another name. "
45			. "If you are already a registered player, make sure nobody "
46			. "else is using your account at this time. If you lost your conenction "
47			. "then the server will likely timeout within a minute. If you still "
48			. "cannot log-in after a minute, you are still logged in. Make sure "
49			. "you do not have another client running. If you use windows, reboot, "
50			. "this will fix anything.",
51			cf::NDI_RED
52			);
53
54			1
55			}
56
57	root	1.11	sub check_clean_save {
58			my ($pl) = @_;
59
60			unless (delete $pl->{clean_save}) {
61			#d#TODO
62			}
63			}
64
65	root	1.1	# delete a player directory, be non-blocking AND synchronous...
66			# (thats hard, so we crap out and fork).
67			sub nuke_playerdir {
68			my ($user) = @_;
69
70			aio_stat "$PLAYERDIR/$user";
71			system "cd \Q$PLAYERDIR\E "
72			. "&& mv \Q$user\E ~\Q$Coro::current\E~deleting~ 2>/dev/null "
73			. "&& (rm -rf ~\Q$Coro::current\E~deleting~ &)";
74			}
75
76	root	1.8	sub addme {
77	root	1.1	my ($ns) = @_;
78
79			$ns->destroy if $ns->pl;
80
81	root	1.10	$ns->async (sub {
82	root	1.1	my ($user, $pass);
83
84			$ns->send_packet ("addme_success");
85
86			for (;;) {
87			$ns->send_drawinfo (
88			"Please enter your username now. If you are a new user, "
89			. "make one up that describes your character best. "
90			. "Only letters and digits are allowed, though.",
91			cf::NDI_BLUE
92			);
93
94			# read username
95			while () {
96			$user = query $ns, 0, "What is your name?\n:";
97	root	1.3
98			if ($cf::LOGIN_LOCK{$user}) {
99			$ns->send_drawinfo (
100			"That username is currently used in another login session. "
101			. "Chose another, or wait till the other session has ended.",
102			cf::NDI_RED
103			);
104			} elsif ($user =~ /^[a-zA-Z0-9][a-zA-Z0-9\-_]{2,17}$/) {
105			last;
106			} else {
107			$ns->send_drawinfo (
108			"Your username contains illegal characters "
109			. "(only a-z, A-Z and 0-9 are allowed), "
110			. "or is not between 3 and 18 characters in length.",
111			cf::NDI_RED
112			);
113			}
114	root	1.1	}
115
116			check_playing $ns, $user and next;
117
118			$ns->send_drawinfo (
119			"Welcome $user, please enter your password now. "
120			. "New users should now choose a password. "
121			. "Anything your client lets you enter is fine.",
122			cf::NDI_BLUE
123			);
124
125			# read password
126			while () {
127			$pass = query $ns, cf::CS_QUERY_HIDEINPUT, "What is your password?\n:";
128			last if $pass =~ /.../;
129			$ns->send_drawinfo (
130			"Try to use at least three characters as your password please, "
131			. "that cannot be too much to ask for :)",
132			cf::NDI_RED
133			);
134			}
135
136	root	1.3	# lock this username for the remainder of this login session
137			if ($cf::LOGIN_LOCK{$user}) {
138			$ns->send_drawinfo (
139			"That username is currently used in another login session. "
140			. "Chose another, or wait till the other session has ended.",
141			cf::NDI_RED
142			);
143			next;
144			}
145			local $cf::LOGIN_LOCK{$user} = 1;
146
147			check_playing $ns, $user and next;
148
149	root	1.1	# try to read the user file and check the password
150	root	1.11	if (my $fh = aio_open cf::player::path $user, O_RDONLY, 0) {
151	root	1.1	my $mtime = (stat $fh)[9];
152
153			0 < aio_read $fh, 0, 16384, my $buf, 0 or next;
154			$buf =~ /^password (\S+)$/m or next;
155			my $hash = $1;
156
157			if ($hash eq crypt $pass, $hash) {
158	root	1.9	nuke_str $pass;
159	root	1.1	# password matches, wonderful
160	root	1.11	my $pl = cf::player::find $user or next;
161	root	1.1	$pl->connect ($ns);
162	root	1.11	check_clean_save $pl;
163	root	1.1	last;
164	root	1.3	} elsif (can_cleanup $buf, $mtime) {
165	root	1.1	Coro::Timer::sleep 1;
166
167			$ns->send_drawinfo (
168	root	1.3	"Player exists, but password does not match. If this is your account, "
169			. "please try again. If not, you can now decide to take over this account "
170	root	1.1	. "because it has not been in-use for some time.",
171			cf::NDI_RED
172			);
173
174	root	1.9	#TODO: nuke_str
175	root	1.1	(query $ns, cf::CS_QUERY_SINGLECHAR, "Delete existing account and create a new one (Y/N)?") =~ /^[yY]/
176			or next;
177
178			# check if the file hasn't changed
179	root	1.11	aio_stat cf::player::path $user and next;
180	root	1.1	$mtime == (stat _)[9] or next;
181
182			nuke_playerdir $user;
183
184			# fall through to creation
185			} else {
186	root	1.9	nuke_str $pass;
187
188	root	1.1	Coro::Timer::sleep 1;
189
190			$ns->send_drawinfo (
191			"Wrong username or password. Please try again "
192			. "(check for Numlock and other semi-obvious error sources).",
193			cf::NDI_RED
194			);
195			next;
196			}
197			}
198
199			# the rest of this function is character creation
200
201	root	1.3	# just to make sure nothing is left over
202	root	1.1	nuke_playerdir $user;
203
204	root	1.3	my $pass2 = query $ns, cf::CS_QUERY_HIDEINPUT, "Please type your password again.";
205
206			if ($pass2 ne $pass) {
207	root	1.9	nuke_str $pass;
208			nuke_str $pass2;
209	root	1.3	$ns->send_drawinfo (
210			"The passwords do not match, please try again.",
211			cf::NDI_RED
212			);
213			next;
214			}
215
216	root	1.9	nuke_str $pass2;
217
218	root	1.11	my $pl = cf::player::new $user;
219	root	1.1	$pl->password (crypt $pass, join '', ('.', '/', 0..9, 'A'..'Z', 'a'..'z')[rand 64, rand 64]);
220	root	1.9	nuke_str $pass;
221	root	1.1	$pl->connect ($ns);
222	root	1.3
223	root	1.1	my $ob = $pl->ob;
224
225			while () {
226			$ob->update_stats;
227			$pl->save_stats;
228
229			my $res = query $ns, cf::CS_QUERY_SINGLECHAR,
230			"[y] to roll new stats [n] to use stats\n[1-7] [1-7] to swap stats.\nRoll again (y/n/1-7)?";
231
232			if ($res =~ /^[Nn]/) {
233			last;
234			} elsif ($res > 0 && $res <= 7) {
235			my $swap = query $ns, cf::CS_QUERY_SINGLECHAR, "Swap stat with (will not roll new stats) [1-7]?";
236
237			if ($swap > 0 && $swap <= 7) {
238			$ob->swap_stats ($res - 1, $swap - 1);
239			}
240			} else {
241			$ob->roll_stats;
242			}
243			}
244
245			$ob->set_animation (2);
246			$ob->add_statbonus;
247
248			$ns->send_drawinfo ($ob->msg, cf::NDI_BLUE);
249			$ns->send_packet (sprintf "query %d %s", cf::CS_QUERY_SINGLECHAR,
250			"Now choose a character.\nPress any key to change outlook.\nPress `d' when you're pleased.\n");
251
252			$ns->state (cf::ST_CHANGE_CLASS);
253	root	1.11	delete $pl->{deny_save};#d# too early
254	root	1.1
255			last;
256			}
257			});
258			}
259
260	root	1.11	# "Quitting will delete your character PERMANENTLY. If you are sure you want to do this, then use the quit_character command instead of quit."
261			# "Quitting will delete your character.\nAre you sure you want to quit (y/n):"
262			# quit, quit_character, save
263
264	root	1.1	cf::object->attach (
265			type => cf::SAVEBED,
266			on_apply => sub {
267			my ($bed, $ob) = @_;
268
269			return cf::override 0 unless $ob->type == cf::PLAYER;
270
271	root	1.11	my $pl = $ob->pl;
272
273	root	1.1	# update respawn position
274	root	1.11	$pl->savebed ($bed->map->path, $bed->x, $bed->y);
275	root	1.1
276	root	1.11	$pl->killer ("left");
277	root	1.5	$ob->check_score;
278	root	1.1
279			$ob->reply (undef, "In the future, you will wake up here when you die.");
280
281	root	1.11	$pl->ns->query (cf::CS_QUERY_SINGLECHAR, "Do you want to continue playing (y/n)?", sub {
282	root	1.6	if ($_[0] !~ /^[yY]/) {
283	root	1.11	$pl->invoke (cf::EVENT_PLAYER_LOGOUT, 1);
284			$pl->deactivate;
285			$pl->ns->destroy;
286	root	1.7	} else {
287	root	1.11	cf::async {
288			$pl->{clean_save} = 1;
289			$pl->save;
290			};
291	root	1.6	}
292	root	1.1	});
293			},
294			);
295
296	root	1.8	cf::player->attach (
297			on_login => sub {
298			my ($pl) = @_;
299			my $name = $pl->ob->name;
300
301			$_->ob->message ("$name has entered the game.", cf::NDI_DK_ORANGE \| cf::NDI_UNIQUE) for cf::player::list;
302			},
303			on_logout => sub {
304			my ($pl, $cleanly) = @_;
305			my $name = $pl->ob->name;
306
307			if ($cleanly) {
308			$_->ob->message ("$name left the game.", cf::NDI_DK_ORANGE \| cf::NDI_UNIQUE) for cf::player::list;
309			} else {
310			$_->ob->message ("$name uncerimoniously disconnected.", cf::NDI_DK_ORANGE \| cf::NDI_UNIQUE) for cf::player::list;
311			}
312			},
313			);
314
315			cf::client->attach (
316			on_addme => \&addme,
317			);
318	root	1.1
319	root	1.11	#############################################################################
320
321			our $SCHEDULE_INTERVAL = 10; # time the player scheduler sleeps between runs
322			our $SWAP_TIMEOUT = 30; # time after which an unused player is evicted form memory
323			our $SAVE_TIMEOUT = 20; # save players every n seconds
324			our $SAVE_INTERVAL = 0.1; # save at max. one player every $SAVE_INTERVAL
325
326			our $SCHEDULER = cf::async_ext {
327			while () {
328			Coro::Timer::sleep $SCHEDULE_INTERVAL;
329
330			# this weird form of iteration over values is used because
331			# the hash changes underneath us frequently, and for
332			# keeps a direct reference to the value without (in 5.8 perls)
333			# keeping a reference, so this is prone to crashes or worse.
334			my @players = keys %cf::PLAYER;
335			for (@players) {
336			my $pl = $cf::PLAYER{$_}
337			or next;
338			$pl->valid or next;
339
340			eval {
341			if ($pl->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
342			$pl->save;
343			Coro::Timer::sleep $SAVE_INTERVAL;
344			}
345			};
346			warn $@ if $@;
347			Coro::cede;
348			};
349			}
350			};
351
352			$SCHEDULER->prio (1);
353