server/ext/login.ext

#! perl

# login handling

use Fcntl;
use Coro::AIO;

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

# testbed for coroutines in crossfire :

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 $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
}

# 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 on_addme {
   my ($ns) = @_;

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

   $ns->coro (sub {
      my ($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:";
            last if $user =~ /^[a-zA-Z0-9][a-zA-Z0-9\-_]{2,17}$/;
            $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
            );
         }

         check_playing $ns, $user and next;

         my $dir    = "$PLAYERDIR/$user";
         my $plfile = "$dir/$user.pl";

         # try to read the user file and check the password
         if (my $fh = aio_open $plfile, 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;

            check_playing $ns, $user and next;

            if ($hash eq crypt $pass, $hash) {
               # password matches, wonderful
               my $pl = cf::player::load $plfile or next;
               $pl->enable_save (1);
               $pl->connect ($ns);
               last;
            }

            if (can_cleanup $buf, $mtime) {
               Coro::Timer::sleep 1;

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

               (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 $plfile or next;
               $mtime == (stat _)[9] or next;

               # nuke playerdir, this might block, but it needs to be atomic
               nuke_playerdir $user;

               # fall through to creation
            } else {
               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
         check_playing $ns, $user and next;

         nuke_playerdir $user;

         my $pl = cf::player::create;
         $pl->ob->name ($user);
         $pl->password (crypt $pass, join '', ('.', '/', 0..9, 'A'..'Z', 'a'..'z')[rand 64, rand 64]);
         $pl->connect ($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);
         $pl->enable_save (1);#d# too early

         last;
      }
   });
}

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

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

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

      #TODO?
      #strcpy (pl->contr->killer, "left");
      #check_score (pl);             /* Always check score */

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

      $ob->contr->ns->query (cf::CS_QUERY_SINGLECHAR, "Do you want to continue playing (y/n)?", sub {
          if ($_[0] !~ /^[yY]/) {
             $ob->contr->save (1);
             $ob->contr->ns->destroy ();
          }
      });
   },
);

cf::client->attach (package => __PACKAGE__);

Revision:	1.2
Committed:	Sat Dec 23 03:38:43 2006 UTC (17 years, 5 months ago) by root
Branch:	MAIN
Changes since 1.1:	+3 -4 lines
Log Message:	- surprisingly, there were some bugs. in Event, too :( - dieing and food checking are now only done in ST_PLAYING state. this might, but should not be, exploitable, in serious ways.
#	Content
1	#! perl
2
3	# login handling
4
5	use Fcntl;
6	use Coro::AIO;
7
8	my $PLAYERDIR = sprintf "%s/%s", cf::localdir, cf::playerdir;
9
10	# testbed for coroutines in crossfire :
11
12	sub query {
13	my ($ns, $flags, $text) = @_;
14
15	my $current = $Coro::current;
16	$ns->query ($flags, $text, sub { $current->ready; $current = $_[0]; });
17	Coro::schedule while ref $current;
18
19	$current
20	}
21
22	sub can_cleanup {
23	my ($playerfile, $mtime) = @_;
24
25	my $age = time - $mtime;
26	my $level = $playerfile =~ /^level (\d+)$/m ? $1 : return;
27
28	($level <= 3 && $age > 7 * 86400) # 7 days for level 0..3
29	\|\| ($level <= 9 && $age > 90 * 86400) # 3 months for level 4..9
30	\|\| ($level <= 20 && $age > 180 * 86400) # 6 months for level 10..20
31	\|\| $age > 700 * 86400 # 2 years for everybody else
32	}
33
34	sub check_playing {
35	my ($ns, $user) = @_;
36
37	return unless cf::player::find $user;
38
39	$ns->send_drawinfo (
40	"That player is already logged in on this server. "
41	. "If you want to create a new player, choose another name. "
42	. "If you are already a registered player, make sure nobody "
43	. "else is using your account at this time. If you lost your conenction "
44	. "then the server will likely timeout within a minute. If you still "
45	. "cannot log-in after a minute, you are still logged in. Make sure "
46	. "you do not have another client running. If you use windows, reboot, "
47	. "this will fix anything.",
48	cf::NDI_RED
49	);
50
51	1
52	}
53
54	# delete a player directory, be non-blocking AND synchronous...
55	# (thats hard, so we crap out and fork).
56	sub nuke_playerdir {
57	my ($user) = @_;
58
59	aio_stat "$PLAYERDIR/$user";
60	system "cd \Q$PLAYERDIR\E "
61	. "&& mv \Q$user\E ~\Q$Coro::current\E~deleting~ 2>/dev/null "
62	. "&& (rm -rf ~\Q$Coro::current\E~deleting~ &)";
63	}
64
65	sub on_addme {
66	my ($ns) = @_;
67
68	$ns->destroy if $ns->pl;
69
70	$ns->coro (sub {
71	my ($user, $pass);
72
73	$ns->send_packet ("addme_success");
74
75	for (;;) {
76	$ns->send_drawinfo (
77	"Please enter your username now. If you are a new user, "
78	. "make one up that describes your character best. "
79	. "Only letters and digits are allowed, though.",
80	cf::NDI_BLUE
81	);
82
83	# read username
84	while () {
85	$user = query $ns, 0, "What is your name?\n:";
86	last if $user =~ /^[a-zA-Z0-9][a-zA-Z0-9\-_]{2,17}$/;
87	$ns->send_drawinfo (
88	"Your username contains illegal characters "
89	. "(only a-z, A-Z and 0-9 are allowed), "
90	. "or is not between 3 and 18 characters in length.",
91	cf::NDI_RED
92	);
93	}
94
95	check_playing $ns, $user and next;
96
97	$ns->send_drawinfo (
98	"Welcome $user, please enter your password now. "
99	. "New users should now choose a password. "
100	. "Anything your client lets you enter is fine.",
101	cf::NDI_BLUE
102	);
103
104	# read password
105	while () {
106	$pass = query $ns, cf::CS_QUERY_HIDEINPUT, "What is your password?\n:";
107	last if $pass =~ /.../;
108	$ns->send_drawinfo (
109	"Try to use at least three characters as your password please, "
110	. "that cannot be too much to ask for :)",
111	cf::NDI_RED
112	);
113	}
114
115	check_playing $ns, $user and next;
116
117	my $dir = "$PLAYERDIR/$user";
118	my $plfile = "$dir/$user.pl";
119
120	# try to read the user file and check the password
121	if (my $fh = aio_open $plfile, O_RDONLY, 0) {
122	my $mtime = (stat $fh)[9];
123
124	0 < aio_read $fh, 0, 16384, my $buf, 0 or next;
125	$buf =~ /^password (\S+)$/m or next;
126	my $hash = $1;
127
128	check_playing $ns, $user and next;
129
130	if ($hash eq crypt $pass, $hash) {
131	# password matches, wonderful
132	my $pl = cf::player::load $plfile or next;
133	$pl->enable_save (1);
134	$pl->connect ($ns);
135	last;
136	}
137
138	if (can_cleanup $buf, $mtime) {
139	Coro::Timer::sleep 1;
140
141	$ns->send_drawinfo (
142	"Player exists, but password does not match. If this is you account, "
143	. "please try again. If not, you can now opt to take over this account "
144	. "because it has not been in-use for some time.",
145	cf::NDI_RED
146	);
147
148	(query $ns, cf::CS_QUERY_SINGLECHAR, "Delete existing account and create a new one (Y/N)?") =~ /^[yY]/
149	or next;
150
151	# check if the file hasn't changed
152	aio_stat $plfile or next;
153	$mtime == (stat _)[9] or next;
154
155	# nuke playerdir, this might block, but it needs to be atomic
156	nuke_playerdir $user;
157
158	# fall through to creation
159	} else {
160	Coro::Timer::sleep 1;
161
162	$ns->send_drawinfo (
163	"Wrong username or password. Please try again "
164	. "(check for Numlock and other semi-obvious error sources).",
165	cf::NDI_RED
166	);
167	next;
168	}
169	}
170
171	# the rest of this function is character creation
172	check_playing $ns, $user and next;
173
174	nuke_playerdir $user;
175
176	my $pl = cf::player::create;
177	$pl->ob->name ($user);
178	$pl->password (crypt $pass, join '', ('.', '/', 0..9, 'A'..'Z', 'a'..'z')[rand 64, rand 64]);
179	$pl->connect ($ns);
180	my $ob = $pl->ob;
181
182	while () {
183	$ob->update_stats;
184	$pl->save_stats;
185
186	my $res = query $ns, cf::CS_QUERY_SINGLECHAR,
187	"[y] to roll new stats [n] to use stats\n[1-7] [1-7] to swap stats.\nRoll again (y/n/1-7)?";
188
189	if ($res =~ /^[Nn]/) {
190	last;
191	} elsif ($res > 0 && $res <= 7) {
192	my $swap = query $ns, cf::CS_QUERY_SINGLECHAR, "Swap stat with (will not roll new stats) [1-7]?";
193
194	if ($swap > 0 && $swap <= 7) {
195	$ob->swap_stats ($res - 1, $swap - 1);
196	}
197	} else {
198	$ob->roll_stats;
199	}
200	}
201
202	$ob->set_animation (2);
203	$ob->add_statbonus;
204
205	$ns->send_drawinfo ($ob->msg, cf::NDI_BLUE);
206	$ns->send_packet (sprintf "query %d %s", cf::CS_QUERY_SINGLECHAR,
207	"Now choose a character.\nPress any key to change outlook.\nPress `d' when you're pleased.\n");
208
209	$ns->state (cf::ST_CHANGE_CLASS);
210	$pl->enable_save (1);#d# too early
211
212	last;
213	}
214	});
215	}
216
217	cf::object->attach (
218	type => cf::SAVEBED,
219	on_apply => sub {
220	my ($bed, $ob) = @_;
221
222	return cf::override 0 unless $ob->type == cf::PLAYER;
223
224	# update respawn position
225	$ob->contr->savebed ($bed->map->path, $bed->x, $bed->y);
226
227	#TODO?
228	#strcpy (pl->contr->killer, "left");
229	#check_score (pl); /* Always check score */
230
231	$ob->reply (undef, "In the future, you will wake up here when you die.");
232	$ob->contr->save ();
233
234	$ob->contr->ns->query (cf::CS_QUERY_SINGLECHAR, "Do you want to continue playing (y/n)?", sub {
235	if ($_[0] !~ /^[yY]/) {
236	$ob->contr->save (1);
237	$ob->contr->ns->destroy ();
238	}
239	});
240	},
241	);
242
243	cf::client->attach (package => __PACKAGE__);
244