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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.38 by root, Thu Aug 24 17:29:30 2006 UTC vs.
Revision 1.86 by root, Thu Dec 14 05:09:32 2006 UTC

…		…
5	use Storable;	5	use Storable;
6	use Opcode;	6	use Opcode;
7	use Safe;	7	use Safe;
8	use Safe::Hole;	8	use Safe::Hole;
9		9
		10	use IO::AIO ();
		11	use YAML::Syck ();
10	use Time::HiRes;	12	use Time::HiRes;
11	use Event;	13	use Event;
12	$Event::Eval = 1; # no idea why this is required, but it is	14	$Event::Eval = 1; # no idea why this is required, but it is
13		15
		16	# work around bug in YAML::Syck - bad news for perl6, will it be as broken wrt. unicode?
		17	$YAML::Syck::ImplicitUnicode = 1;
		18
14	use strict;	19	use strict;
15		20
16	our %COMMAND;	21	our %COMMAND = ();
		22	our %COMMAND_TIME = ();
		23	our %EXTCMD = ();
		24
		25	_init_vars;
		26
17	our @EVENT;	27	our @EVENT;
18	our @PLUGIN_EVENT;
19	our %PROP_TYPE;
20	our %PROP_IDX;
21	our $LIBDIR = maps_directory "perl";	28	our $LIBDIR = maps_directory "perl";
22		29
23	our $TICK = MAX_TIME * 1e-6;	30	our $TICK = MAX_TIME * 1e-6;
24	our $TICK_WATCHER;	31	our $TICK_WATCHER;
25	our $NEXT_TICK;	32	our $NEXT_TICK;
26		33
		34	our %CFG;
		35
		36	our $UPTIME; $UPTIME ||= time;
		37
		38	#############################################################################
		39
		40	=head2 GLOBAL VARIABLES
		41
		42	=over 4
		43
		44	=item $cf::UPTIME
		45
		46	The timestamp of the server start (so not actually an uptime).
		47
		48	=item $cf::LIBDIR
		49
		50	The perl library directory, where extensions and cf-specific modules can
		51	be found. It will be added to C<@INC> automatically.
		52
		53	=item $cf::TICK
		54
		55	The interval between server ticks, in seconds.
		56
		57	=item %cf::CFG
		58
		59	Configuration for the server, loaded from C</etc/crossfire/config>, or
		60	from wherever your confdir points to.
		61
		62	=back
		63
		64	=cut
		65
27	BEGIN {	66	BEGIN {
28	@PLUGIN_EVENT = map lc, @PLUGIN_EVENT;
29
30	*CORE::GLOBAL::warn = sub {	67	*CORE::GLOBAL::warn = sub {
31	my $msg = join "", @_;	68	my $msg = join "", @_;
32	$msg .= "\n"	69	$msg .= "\n"
33	unless $msg =~ /\n$/;	70	unless $msg =~ /\n$/;
34		71
35	print STDERR "cfperl: $msg";	72	print STDERR "cfperl: $msg";
36	LOG llevError, "cfperl: $msg";	73	LOG llevError, "cfperl: $msg";
37	};	74	};
38	}	75	}
39		76
40	my %ignore_set = (MAP_PROP_PATH => 1); # I hate the plug-in api. Deeply!	77	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
41		78
42	# generate property mutators	79	# we bless all objects into (empty) derived classes to force a method lookup
43	sub prop_gen {	80	# within the Safe compartment.
44	my ($prefix, $class) = @_;	81	for my $pkg (qw(
45		82	cf::object cf::object::player
		83	cf::client_socket cf::player
		84	cf::arch cf::living
		85	cf::map cf::party cf::region
		86	)) {
46	no strict 'refs';	87	no strict 'refs';
47
48	for my $prop (keys %PROP_TYPE) {
49	$prop =~ /^\Q$prefix\E_(.*$)/ or next;
50	my $sub = lc $1;
51
52	my $type = $PROP_TYPE{$prop};
53	my $idx = $PROP_IDX {$prop};
54
55	*{"$class\::get_$sub"} = *{"$class\::$sub"} = sub {
56	$_[0]->get_property ($type, $idx)
57	};
58
59	*{"$class\::set_$sub"} = sub {
60	$_[0]->set_property ($type, $idx, $_[1]);
61	} unless $ignore_set{$prop};
62	}
63	}
64
65	# auto-generate most of the API
66
67	prop_gen OBJECT_PROP => "cf::object";
68	# CFAPI_OBJECT_ANIMATION?
69	prop_gen PLAYER_PROP => "cf::object::player";
70
71	prop_gen MAP_PROP => "cf::map";
72	prop_gen ARCH_PROP => "cf::arch";
73
74	# guessed hierarchies
75
76	@ext::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
77	@ext::cf::object::map::ISA = @cf::object::map::ISA = 'cf::object';
78
79	# we bless all objects into derived classes to force a method lookup
80	# within the Safe compartment.
81	for my $pkg (qw(cf::object cf::object::map cf::object::player cf::player cf::map cf::party cf::region cf::arch)) {
82	no strict 'refs';
83	@{"ext::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;	88	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;
84	}	89	}
85		90
86	$Event::DIED = sub {	91	$Event::DIED = sub {
87	warn "error in event callback: @_";	92	warn "error in event callback: @_";
88	};	93	};
89		94
90	my %ext_pkg;	95	my %ext_pkg;
91	my @exts;	96	my @exts;
92	my @hook;	97	my @hook;
93	my %command;
94	my %extcmd;
95		98
96	sub inject_event {	99	=head2 UTILITY FUNCTIONS
		100
		101	=over 4
		102
		103	=cut
		104
		105	use JSON::Syck (); # TODO# replace by JSON::PC once working
		106
		107	=item $ref = cf::from_json $json
		108
		109	Converts a JSON string into the corresponding perl data structure.
		110
		111	=cut
		112
		113	sub from_json($) {
		114	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs
		115	JSON::Syck::Load $_[0]
		116	}
		117
		118	=item $json = cf::to_json $ref
		119
		120	Converts a perl data structure into its JSON representation.
		121
		122	=cut
		123
		124	sub to_json($) {
		125	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs
		126	JSON::Syck::Dump $_[0]
		127	}
		128
		129	=back
		130
		131	=cut
		132
		133	#############################################################################
		134
		135	=head2 EVENTS AND OBJECT ATTACHMENTS
		136
		137	=over 4
		138
		139	=item $object->attach ($attachment, key => $value...)
		140
		141	=item $object->detach ($attachment)
		142
		143	Attach/detach a pre-registered attachment to an object.
		144
		145	=item $player->attach ($attachment, key => $value...)
		146
		147	=item $player->detach ($attachment)
		148
		149	Attach/detach a pre-registered attachment to a player.
		150
		151	=item $map->attach ($attachment, key => $value...)
		152
		153	=item $map->detach ($attachment)
		154
		155	Attach/detach a pre-registered attachment to a map.
		156
		157	=item $bool = $object->attached ($name)
		158
		159	=item $bool = $player->attached ($name)
		160
		161	=item $bool = $map->attached ($name)
		162
		163	Checks wether the named attachment is currently attached to the object.
		164
		165	=item cf::attach_global ...
		166
		167	Attach handlers for global events.
		168
		169	This and all following C<attach_*>-functions expect any number of the
		170	following handler/hook descriptions:
		171
		172	=over 4
		173
		174	=item prio => $number
		175
		176	Set the priority for all following handlers/hooks (unless overwritten
		177	by another C<prio> setting). Lower priority handlers get executed
		178	earlier. The default priority is C<0>, and many built-in handlers are
		179	registered at priority C<-1000>, so lower priorities should not be used
		180	unless you know what you are doing.
		181
		182	=item on_I<event> => \&cb
		183
		184	Call the given code reference whenever the named event happens (event is
		185	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which
		186	handlers are recognised generally depends on the type of object these
		187	handlers attach to).
		188
		189	See F<include/eventinc.h> for the full list of events supported, and their
		190	class.
		191
		192	=item package => package::
		193
		194	Look for sub functions of the name C<< on_I<event> >> in the given
		195	package and register them. Only handlers for eevents supported by the
		196	object/class are recognised.
		197
		198	=back
		199
		200	=item cf::attach_to_type $object_type, $subtype, ...
		201
		202	Attach handlers for a specific object type (e.g. TRANSPORT) and
		203	subtype. If C<$subtype> is zero or undef, matches all objects of the given
		204	type.
		205
		206	=item cf::attach_to_objects ...
		207
		208	Attach handlers to all objects. Do not use this except for debugging or
		209	very rare events, as handlers are (obviously) called for I<all> objects in
		210	the game.
		211
		212	=item cf::attach_to_players ...
		213
		214	Attach handlers to all players.
		215
		216	=item cf::attach_to_maps ...
		217
		218	Attach handlers to all maps.
		219
		220	=item cf:register_attachment $name, ...
		221
		222	Register an attachment by name through which objects can refer to this
		223	attachment.
		224
		225	=item cf:register_player_attachment $name, ...
		226
		227	Register an attachment by name through which players can refer to this
		228	attachment.
		229
		230	=item cf:register_map_attachment $name, ...
		231
		232	Register an attachment by name through which maps can refer to this
		233	attachment.
		234
		235	=cut
		236
		237	# the following variables are defined in .xs and must not be re-created
		238	our @CB_GLOBAL = (); # registry for all global events
		239	our @CB_OBJECT = (); # all objects (should not be used except in emergency)
		240	our @CB_PLAYER = ();
		241	our @CB_TYPE = (); # registry for type (cf-object class) based events
		242	our @CB_MAP = ();
		243
		244	my %attachment;
		245
		246	sub _attach_cb($\%$$$) {
		247	my ($registry, $undo, $event, $prio, $cb) = @_;
		248
		249	use sort 'stable';
		250
		251	$cb = [$prio, $cb];
		252
		253	@{$registry->[$event]} = sort
		254	{ $a->[0] cmp $b->[0] }
		255	@{$registry->[$event] || []}, $cb;
		256
		257	push @{$undo->{cb}}, [$event, $cb];
		258	}
		259
		260	# attach handles attaching event callbacks
		261	# the only thing the caller has to do is pass the correct
		262	# registry (== where the callback attaches to).
		263	sub _attach(\@$@) {
		264	my ($registry, $klass, @arg) = @_;
		265
		266	my $prio = 0;
		267
		268	my %undo = (
		269	registry => $registry,
		270	cb => [],
		271	);
		272
		273	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
		274
		275	while (@arg) {
		276	my $type = shift @arg;
		277
		278	if ($type eq "prio") {
		279	$prio = shift @arg;
		280
		281	} elsif ($type eq "package") {
		282	my $pkg = shift @arg;
		283
		284	while (my ($name, $id) = each %cb_id) {
		285	if (my $cb = $pkg->can ($name)) {
		286	_attach_cb $registry, %undo, $id, $prio, $cb;
		287	}
		288	}
		289
		290	} elsif (exists $cb_id{$type}) {
		291	_attach_cb $registry, %undo, $cb_id{$type}, $prio, shift @arg;
		292
		293	} elsif (ref $type) {
		294	warn "attaching objects not supported, ignoring.\n";
		295
		296	} else {
		297	shift @arg;
		298	warn "attach argument '$type' not supported, ignoring.\n";
		299	}
		300	}
		301
		302	\%undo
		303	}
		304
		305	sub _attach_attachment {
		306	my ($obj, $name, %arg) = @_;
		307
		308	return if exists $obj->{_attachment}{$name};
		309
		310	my $res;
		311
		312	if (my $attach = $attachment{$name}) {
		313	my $registry = $obj->registry;
		314
		315	for (@$attach) {
		316	my ($klass, @attach) = @$_;
		317	$res = _attach @$registry, $klass, @attach;
		318	}
		319
		320	$obj->{$name} = \%arg;
		321	} else {
		322	warn "object uses attachment '$name' that is not available, postponing.\n";
		323	}
		324
		325	$obj->{_attachment}{$name} = undef;
		326
		327	$res->{attachment} = $name;
		328	$res
		329	}
		330
		331	*cf::object::attach =
		332	*cf::player::attach =
		333	*cf::map::attach = sub {
		334	my ($obj, $name, %arg) = @_;
		335
		336	_attach_attachment $obj, $name, %arg;
		337	};
		338
		339	# all those should be optimised
		340	*cf::object::detach =
		341	*cf::player::detach =
		342	*cf::map::detach = sub {
		343	my ($obj, $name) = @_;
		344
		345	delete $obj->{_attachment}{$name};
		346	reattach ($obj);
		347	};
		348
		349	*cf::object::attached =
		350	*cf::player::attached =
		351	*cf::map::attached = sub {
		352	my ($obj, $name) = @_;
		353
		354	exists $obj->{_attachment}{$name}
		355	};
		356
		357	sub attach_global {
		358	_attach @CB_GLOBAL, KLASS_GLOBAL, @_
		359	}
		360
		361	sub attach_to_type {
97	my $extension = shift;	362	my $type = shift;
98	my $event_code = shift;	363	my $subtype = shift;
99		364
100	my $cb = $hook[$event_code]{$extension}	365	_attach @{$CB_TYPE[$type + $subtype * NUM_SUBTYPES]}, KLASS_OBJECT, @_
101	or return;
102
103	&$cb
104	}	366	}
105		367
106	sub inject_global_event {	368	sub attach_to_objects {
		369	_attach @CB_OBJECT, KLASS_OBJECT, @_
		370	}
		371
		372	sub attach_to_players {
		373	_attach @CB_PLAYER, KLASS_PLAYER, @_
		374	}
		375
		376	sub attach_to_maps {
		377	_attach @CB_MAP, KLASS_MAP, @_
		378	}
		379
		380	sub register_attachment {
		381	my $name = shift;
		382
		383	$attachment{$name} = [[KLASS_OBJECT, @_]];
		384	}
		385
		386	sub register_player_attachment {
		387	my $name = shift;
		388
		389	$attachment{$name} = [[KLASS_PLAYER, @_]];
		390	}
		391
		392	sub register_map_attachment {
		393	my $name = shift;
		394
		395	$attachment{$name} = [[KLASS_MAP, @_]];
		396	}
		397
		398	our $override;
		399	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
		400
		401	sub override {
		402	$override = 1;
		403	@invoke_results = ();
		404	}
		405
		406	sub do_invoke {
107	my $event = shift;	407	my $event = shift;
		408	my $callbacks = shift;
108		409
109	my $cb = $hook[$event]	410	@invoke_results = ();
110	or return;
111		411
112	List::Util::max map &$_, values %$cb	412	local $override;
113	}
114		413
115	sub inject_command {	414	for (@$callbacks) {
		415	eval { &{$_->[1]} };
		416
		417	if ($@) {
		418	warn "$@";
		419	warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
		420	override;
		421	}
		422
		423	return 1 if $override;
		424	}
		425
		426	0
		427	}
		428
		429	=item $bool = cf::invoke EVENT_GLOBAL_XXX, ...
		430
		431	=item $bool = $object->invoke (EVENT_OBJECT_XXX, ...)
		432
		433	=item $bool = $player->invoke (EVENT_PLAYER_XXX, ...)
		434
		435	=item $bool = $map->invoke (EVENT_MAP_XXX, ...)
		436
		437	Generate a global/object/player/map-specific event with the given arguments.
		438
		439	This API is preliminary (most likely, the EVENT_KLASS_xxx prefix will be
		440	removed in future versions), and there is no public API to access override
		441	results (if you must, access C<@cf::invoke_results> directly).
		442
		443	=back
		444
		445	=cut
		446
		447	#############################################################################
		448
		449	=head2 METHODS VALID FOR ALL CORE OBJECTS
		450
		451	=over 4
		452
		453	=item $object->valid, $player->valid, $map->valid
		454
		455	Just because you have a perl object does not mean that the corresponding
		456	C-level object still exists. If you try to access an object that has no
		457	valid C counterpart anymore you get an exception at runtime. This method
		458	can be used to test for existence of the C object part without causing an
		459	exception.
		460
		461	=back
		462
		463	=cut
		464
		465	*cf::object::valid =
		466	*cf::player::valid =
		467	*cf::map::valid = \&cf::_valid;
		468
		469	#############################################################################
		470	# object support
		471
		472	sub instantiate {
		473	my ($obj, $data) = @_;
		474
		475	$data = from_json $data;
		476
		477	for (@$data) {
116	my ($name, $obj, $params) = @_;	478	my ($name, $args) = @$_;
117		479
118	for my $cmd (@{ $command{$name} }) {	480	$obj->attach ($name, %{$args || {} });
119	$cmd->[1]->($obj, $params);	481	}
		482	}
		483
		484	# basically do the same as instantiate, without calling instantiate
		485	sub reattach {
		486	my ($obj) = @_;
		487	my $registry = $obj->registry;
		488
		489	@$registry = ();
		490
		491	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };
		492
		493	for my $name (keys %{ $obj->{_attachment} || {} }) {
		494	if (my $attach = $attachment{$name}) {
		495	for (@$attach) {
		496	my ($klass, @attach) = @$_;
		497	_attach @$registry, $klass, @attach;
		498	}
		499	} else {
		500	warn "object uses attachment '$name' that is not available, postponing.\n";
		501	}
		502	}
		503	}
		504
		505	sub object_freezer_save {
		506	my ($filename, $rdata, $objs) = @_;
		507
		508	if (length $$rdata) {
		509	warn sprintf "saving %s (%d,%d)\n",
		510	$filename, length $$rdata, scalar @$objs;
		511
		512	if (open my $fh, ">:raw", "$filename~") {
		513	chmod SAVE_MODE, $fh;
		514	syswrite $fh, $$rdata;
		515	close $fh;
		516
		517	if (@$objs && open my $fh, ">:raw", "$filename.pst~") {
		518	chmod SAVE_MODE, $fh;
		519	syswrite $fh, Storable::nfreeze { version => 1, objs => $objs };
		520	close $fh;
		521	rename "$filename.pst~", "$filename.pst";
		522	} else {
		523	unlink "$filename.pst";
		524	}
		525
		526	rename "$filename~", $filename;
		527	} else {
		528	warn "FATAL: $filename~: $!\n";
		529	}
		530	} else {
		531	unlink $filename;
		532	unlink "$filename.pst";
		533	}
		534	}
		535
		536	sub object_freezer_as_string {
		537	my ($rdata, $objs) = @_;
		538
		539	use Data::Dumper;
		540
		541	$$rdata . Dumper $objs
		542	}
		543
		544	sub object_thawer_load {
		545	my ($filename) = @_;
		546
		547	local $/;
		548
		549	my $av;
		550
		551	#TODO: use sysread etc.
		552	if (open my $data, "<:raw:perlio", $filename) {
		553	$data = <$data>;
		554	if (open my $pst, "<:raw:perlio", "$filename.pst") {
		555	$av = eval { (Storable::thaw <$pst>)->{objs} };
		556	}
		557	return ($data, $av);
		558	}
		559
		560	()
		561	}
		562
		563	attach_to_objects
		564	prio => -1000000,
		565	on_clone => sub {
		566	my ($src, $dst) = @_;
		567
		568	@{$dst->registry} = @{$src->registry};
		569
		570	%$dst = %$src;
		571
		572	%{$dst->{_attachment}} = %{$src->{_attachment}}
		573	if exists $src->{_attachment};
120	}	574	},
		575	;
121		576
122	-1	577	#############################################################################
123	}	578	# command handling &c
		579
		580	=item cf::register_command $name => \&callback($ob,$args);
		581
		582	Register a callback for execution when the client sends the user command
		583	$name.
		584
		585	=cut
124		586
125	sub register_command {	587	sub register_command {
126	my ($name, $time, $cb) = @_;	588	my ($name, $cb) = @_;
127		589
128	my $caller = caller;	590	my $caller = caller;
129	#warn "registering command '$name/$time' to '$caller'";	591	#warn "registering command '$name/$time' to '$caller'";
130		592
131	push @{ $command{$name} }, [$time, $cb, $caller];	593	push @{ $COMMAND{$name} }, [$caller, $cb];
132	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @{ $command{$name} };
133	}	594	}
		595
		596	=item cf::register_extcmd $name => \&callback($pl,$packet);
		597
		598	Register a callbackf ro execution when the client sends an extcmd packet.
		599
		600	If the callback returns something, it is sent back as if reply was being
		601	called.
		602
		603	=cut
134		604
135	sub register_extcmd {	605	sub register_extcmd {
136	my ($name, $cb) = @_;	606	my ($name, $cb) = @_;
137		607
138	my $caller = caller;	608	my $caller = caller;
139	#warn "registering extcmd '$name' to '$caller'";	609	#warn "registering extcmd '$name' to '$caller'";
140		610
141	$extcmd{$name} = [$cb, $caller];	611	$EXTCMD{$name} = [$cb, $caller];
142	}	612	}
		613
		614	attach_to_players
		615	on_command => sub {
		616	my ($pl, $name, $params) = @_;
		617
		618	my $cb = $COMMAND{$name}
		619	or return;
		620
		621	for my $cmd (@$cb) {
		622	$cmd->[1]->($pl->ob, $params);
		623	}
		624
		625	cf::override;
		626	},
		627	on_extcmd => sub {
		628	my ($pl, $buf) = @_;
		629
		630	my $msg = eval { from_json $buf };
		631
		632	if (ref $msg) {
		633	if (my $cb = $EXTCMD{$msg->{msgtype}}) {
		634	if (my %reply = $cb->[0]->($pl, $msg)) {
		635	$pl->ext_reply ($msg->{msgid}, %reply);
		636	}
		637	}
		638	} else {
		639	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
		640	}
		641
		642	cf::override;
		643	},
		644	;
143		645
144	sub register {	646	sub register {
145	my ($base, $pkg) = @_;	647	my ($base, $pkg) = @_;
146		648
147	for my $idx (0 .. $#PLUGIN_EVENT) {	649	#TODO
148	if (my $ref = $pkg->can ("on_$PLUGIN_EVENT[$idx]")) {
149	#warn "registering $PLUGIN_EVENT[$idx] hook to '$pkg'\n";
150	$hook[$idx]{$base} = $ref;
151	}
152	}
153	}	650	}
154		651
155	sub load_extension {	652	sub load_extension {
156	my ($path) = @_;	653	my ($path) = @_;
157		654
158	$path =~ /([^\/\\]+)\.ext$/ or die "$path";	655	$path =~ /([^\/\\]+)\.ext$/ or die "$path";
159	my $base = $1;	656	my $base = $1;
160	my $pkg = $1;	657	my $pkg = $1;
161	$pkg =~ s/[^[:word:]]/_/g;	658	$pkg =~ s/[^[:word:]]/_/g;
162	$pkg = "cf::ext::$pkg";	659	$pkg = "ext::$pkg";
163		660
164	warn "loading '$path' into '$pkg'\n";	661	warn "loading '$path' into '$pkg'\n";
165		662
166	open my $fh, "<:utf8", $path	663	open my $fh, "<:utf8", $path
167	or die "$path: $!";	664	or die "$path: $!";
…		…
171	. "#line 1 \"$path\"\n{\n"	668	. "#line 1 \"$path\"\n{\n"
172	. (do { local $/; <$fh> })	669	. (do { local $/; <$fh> })
173	. "\n};\n1";	670	. "\n};\n1";
174		671
175	eval $source	672	eval $source
176	or die "$path: $@";	673	or die $@ ? "$path: $@\n"
		674	: "extension disabled.\n";
177		675
178	push @exts, $pkg;	676	push @exts, $pkg;
179	$ext_pkg{$base} = $pkg;	677	$ext_pkg{$base} = $pkg;
180		678
181	# no strict 'refs';	679	# no strict 'refs';
…		…
188	my ($pkg) = @_;	686	my ($pkg) = @_;
189		687
190	warn "removing extension $pkg\n";	688	warn "removing extension $pkg\n";
191		689
192	# remove hooks	690	# remove hooks
		691	#TODO
193	for my $idx (0 .. $#PLUGIN_EVENT) {	692	# for my $idx (0 .. $#PLUGIN_EVENT) {
194	delete $hook[$idx]{$pkg};	693	# delete $hook[$idx]{$pkg};
195	}	694	# }
196		695
197	# remove commands	696	# remove commands
198	for my $name (keys %command) {	697	for my $name (keys %COMMAND) {
199	my @cb = grep $_->[2] ne $pkg, @{ $command{$name} };	698	my @cb = grep $_->[0] ne $pkg, @{ $COMMAND{$name} };
200		699
201	if (@cb) {	700	if (@cb) {
202	$command{$name} = \@cb;	701	$COMMAND{$name} = \@cb;
203	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @cb;
204	} else {	702	} else {
205	delete $command{$name};
206	delete $COMMAND{"$name\000"};	703	delete $COMMAND{$name};
207	}	704	}
208	}	705	}
209		706
210	# remove extcmds	707	# remove extcmds
211	for my $name (grep $extcmd{$_}[1] eq $pkg, keys %extcmd) {	708	for my $name (grep $EXTCMD{$_}[1] eq $pkg, keys %EXTCMD) {
212	delete $extcmd{$name};	709	delete $EXTCMD{$name};
213	}	710	}
214		711
215	if (my $cb = $pkg->can ("on_unload")) {	712	if (my $cb = $pkg->can ("unload")) {
216	eval {	713	eval {
217	$cb->($pkg);	714	$cb->($pkg);
218	1	715	1
219	} or warn "$pkg unloaded, but with errors: $@";	716	} or warn "$pkg unloaded, but with errors: $@";
220	}	717	}
…		…
232	1	729	1
233	} or warn "$ext not loaded: $@";	730	} or warn "$ext not loaded: $@";
234	}	731	}
235	}	732	}
236		733
237	sub _perl_reload(&) {
238	my ($msg) = @_;
239
240	$msg->("reloading...");
241
242	eval {
243	# 1. cancel all watchers
244	$_->cancel for Event::all_watchers;
245
246	# 2. unload all extensions
247	for (@exts) {
248	$msg->("unloading <$_>");
249	unload_extension $_;
250	}
251
252	# 3. unload all modules loaded from $LIBDIR
253	while (my ($k, $v) = each %INC) {
254	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
255
256	$msg->("removing <$k>");
257	delete $INC{$k};
258
259	$k =~ s/\.pm$//;
260	$k =~ s/\//::/g;
261
262	if (my $cb = $k->can ("unload_module")) {
263	$cb->();
264	}
265
266	Symbol::delete_package $k;
267	}
268
269	# 4. get rid of ext::, as good as possible
270	Symbol::delete_package "ext::$_"
271	for qw(cf::object cf::object::map cf::object::player cf::player cf::map cf::party cf::region);
272
273	# 5. remove register_script_function callbacks
274	# TODO
275
276	# 6. unload cf.pm "a bit"
277	delete $INC{"cf.pm"};
278
279	# don't, removes xs symbols, too
280	#Symbol::delete_package __PACKAGE__;
281
282	# 7. reload cf.pm
283	$msg->("reloading cf.pm");
284	require cf;
285	};
286	$msg->($@) if $@;
287
288	$msg->("reloaded");
289	};
290
291	sub perl_reload() {
292	_perl_reload {
293	warn $_[0];
294	print "$_[0]\n";
295	};
296	}
297
298	register_command "perl-reload", 0, sub {
299	my ($who, $arg) = @_;
300
301	if ($who->flag (FLAG_WIZ)) {
302	_perl_reload {
303	warn $_[0];
304	$who->message ($_[0]);
305	};
306	}
307	};
308
309	#############################################################################
310	# utility functions
311
312	use JSON::Syck (); # TODO# replace by JSON::PC once working
313
314	sub from_json($) {
315	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs
316	JSON::Syck::Load $_[0]
317	}
318
319	sub to_json($) {
320	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs
321	JSON::Syck::Dump $_[0]
322	}
323
324	#############################################################################
325	# extcmd framework, basically convert ext <msg>
326	# into pkg::->on_extcmd_arg1 (...) while shortcutting a few
327
328	sub on_extcmd {
329	my ($pl, $buf) = @_;
330
331	my $msg = eval { from_json $buf };
332
333	if (ref $msg) {
334	if (my $cb = $extcmd{$msg->{msgtype}}) {
335	if (my %reply = $cb->[0]->($pl, $msg)) {
336	$pl->ext_reply ($msg->{msgid}, %reply);
337	}
338	}
339	} else {
340	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
341	}
342
343	1
344	}
345
346	#############################################################################	734	#############################################################################
347	# load/save/clean perl data associated with a map	735	# load/save/clean perl data associated with a map
348		736
349	*on_mapclean = sub {	737	*cf::mapsupport::on_clean = sub {
350	my ($map) = @_;	738	my ($map) = @_;
351		739
352	my $path = $map->tmpname;	740	my $path = $map->tmpname;
353	defined $path or return;	741	defined $path or return;
354		742
355	unlink "$path.cfperl";	743	unlink "$path.pst";
356	};	744	};
357		745
358	*on_mapin =	746	attach_to_maps prio => -10000, package => cf::mapsupport::;
359	*on_mapload = sub {
360	my ($map) = @_;
361
362	my $path = $map->tmpname;
363	$path = $map->path unless defined $path;
364
365	open my $fh, "<:raw", "$path.cfperl"
366	or return; # no perl data
367
368	my $data = Storable::thaw do { local $/; <$fh> };
369
370	$data->{version} <= 1
371	or return; # too new
372
373	$map->_set_obs ($data->{obs});
374	};
375
376	*on_mapout = sub {
377	my ($map) = @_;
378
379	my $path = $map->tmpname;
380	$path = $map->path unless defined $path;
381
382	my $obs = $map->_get_obs;
383
384	if (defined $obs) {
385	open my $fh, ">:raw", "$path.cfperl"
386	or die "$path.cfperl: $!";
387
388	stat $path;
389
390	print $fh Storable::nfreeze {
391	size => (stat _)[7],
392	time => (stat _)[9],
393	version => 1,
394	obs => $obs,
395	};
396
397	chmod SAVE_MODE, "$path.cfperl"; # very racy, but cf-compatible *g*
398	} else {
399	unlink "$path.cfperl";
400	}
401	};
402		747
403	#############################################################################	748	#############################################################################
404	# load/save perl data associated with player->ob objects	749	# load/save perl data associated with player->ob objects
405		750
406	sub all_objects(@) {	751	sub all_objects(@) {
407	@_, map all_objects ($_->inv), @_	752	@_, map all_objects ($_->inv), @_
408	}	753	}
409		754
410	*on_player_load = sub {	755	# TODO: compatibility cruft, remove when no longer needed
		756	attach_to_players
		757	on_load => sub {
411	my ($ob, $path) = @_;	758	my ($pl, $path) = @_;
412		759
413	for my $o (all_objects $ob) {	760	for my $o (all_objects $pl->ob) {
414	if (my $value = $o->get_ob_key_value ("_perl_data")) {	761	if (my $value = $o->get_ob_key_value ("_perl_data")) {
415	$o->set_ob_key_value ("_perl_data");	762	$o->set_ob_key_value ("_perl_data");
416		763
417	%$o = %{ Storable::thaw pack "H*", $value };	764	%$o = %{ Storable::thaw pack "H*", $value };
418	}	765	}
		766	}
419	}	767	},
420	};	768	;
421
422	*on_player_save = sub {
423	my ($ob, $path) = @_;
424
425	$_->set_ob_key_value (_perl_data => unpack "H*", Storable::nfreeze $_)
426	for grep %$_, all_objects $ob;
427	};
428		769
429	#############################################################################	770	#############################################################################
430	# core extensions - in perl	771
		772	=head2 CORE EXTENSIONS
		773
		774	Functions and methods that extend core crossfire objects.
		775
		776	=over 4
431		777
432	=item cf::player::exists $login	778	=item cf::player::exists $login
433		779
434	Returns true when the given account exists.	780	Returns true when the given account exists.
435		781
…		…
438	sub cf::player::exists($) {	784	sub cf::player::exists($) {
439	cf::player::find $_[0]	785	cf::player::find $_[0]
440	or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;	786	or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;
441	}	787	}
442		788
443	=item $player->reply ($npc, $msg[, $flags])	789	=item $player_object->reply ($npc, $msg[, $flags])
444		790
445	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>	791	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>
446	can be C<undef>. Does the right thing when the player is currently in a	792	can be C<undef>. Does the right thing when the player is currently in a
447	dialogue with the given NPC character.	793	dialogue with the given NPC character.
448		794
…		…
475	$msg{msgid} = $id;	821	$msg{msgid} = $id;
476		822
477	$self->send ("ext " . to_json \%msg);	823	$self->send ("ext " . to_json \%msg);
478	}	824	}
479		825
		826	=item $player_object->may ("access")
		827
		828	Returns wether the given player is authorized to access resource "access"
		829	(e.g. "command_wizcast").
		830
		831	=cut
		832
		833	sub cf::object::player::may {
		834	my ($self, $access) = @_;
		835
		836	$self->flag (cf::FLAG_WIZ) ||
		837	(ref $cf::CFG{"may_$access"}
		838	? scalar grep $self->name eq $_, @{$cf::CFG{"may_$access"}}
		839	: $cf::CFG{"may_$access"})
		840	}
		841
		842	=cut
		843
480	#############################################################################	844	#############################################################################
481	# map scripting support
482		845
		846	=head2 SAFE SCRIPTING
		847
		848	Functions that provide a safe environment to compile and execute
		849	snippets of perl code without them endangering the safety of the server
		850	itself. Looping constructs, I/O operators and other built-in functionality
		851	is not available in the safe scripting environment, and the number of
		852	functions and methods that can be called is greatly reduced.
		853
		854	=cut
		855
483	our $safe = new Safe "ext";	856	our $safe = new Safe "safe";
484	our $safe_hole = new Safe::Hole;	857	our $safe_hole = new Safe::Hole;
485		858
486	$SIG{FPE} = 'IGNORE';	859	$SIG{FPE} = 'IGNORE';
487		860
488	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));	861	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));
489		862
490	# here we export the classes and methods available to script code	863	# here we export the classes and methods available to script code
		864
		865	=pod
		866
		867	The following fucntions and emthods are available within a safe environment:
		868
		869	cf::object contr pay_amount pay_player
		870	cf::object::player player
		871	cf::player peaceful
		872
		873	=cut
491		874
492	for (	875	for (
493	["cf::object" => qw(contr pay_amount pay_player)],	876	["cf::object" => qw(contr pay_amount pay_player)],
494	["cf::object::player" => qw(player)],	877	["cf::object::player" => qw(player)],
495	["cf::player" => qw(peaceful)],	878	["cf::player" => qw(peaceful)],
496	) {	879	) {
497	no strict 'refs';	880	no strict 'refs';
498	my ($pkg, @funs) = @$_;	881	my ($pkg, @funs) = @$_;
499	*{"ext::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})	882	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})
500	for @funs;	883	for @funs;
501	}	884	}
		885
		886	=over 4
		887
		888	=item @retval = safe_eval $code, [var => value, ...]
		889
		890	Compiled and executes the given perl code snippet. additional var/value
		891	pairs result in temporary local (my) scalar variables of the given name
		892	that are available in the code snippet. Example:
		893
		894	my $five = safe_eval '$first + $second', first => 1, second => 4;
		895
		896	=cut
502		897
503	sub safe_eval($;@) {	898	sub safe_eval($;@) {
504	my ($code, %vars) = @_;	899	my ($code, %vars) = @_;
505		900
506	my $qcode = $code;	901	my $qcode = $code;
507	$qcode =~ s/"/‟/g; # not allowed in #line filenames	902	$qcode =~ s/"/‟/g; # not allowed in #line filenames
508	$qcode =~ s/\n/\\n/g;	903	$qcode =~ s/\n/\\n/g;
509		904
510	local $_;	905	local $_;
511	local @ext::cf::_safe_eval_args = values %vars;	906	local @safe::cf::_safe_eval_args = values %vars;
512		907
513	$code =	908	my $eval =
514	"do {\n"	909	"do {\n"
515	. "my (" . (join ",", map "\$$_", keys %vars) . ") = \@cf::_safe_eval_args;\n"	910	. "my (" . (join ",", map "\$$_", keys %vars) . ") = \@cf::_safe_eval_args;\n"
516	. "#line 0 \"{$qcode}\"\n"	911	. "#line 0 \"{$qcode}\"\n"
517	. $code	912	. $code
518	. "\n}"	913	. "\n}"
519	;	914	;
520		915
521	sub_generation_inc;	916	sub_generation_inc;
522	my @res = wantarray ? $safe->reval ($code) : scalar $safe->reval ($code);	917	my @res = wantarray ? $safe->reval ($eval) : scalar $safe->reval ($eval);
523	sub_generation_inc;	918	sub_generation_inc;
524		919
		920	if ($@) {
		921	warn "$@";
		922	warn "while executing safe code '$code'\n";
		923	warn "with arguments " . (join " ", %vars) . "\n";
		924	}
		925
525	wantarray ? @res : $res[0]	926	wantarray ? @res : $res[0]
526	}	927	}
		928
		929	=item cf::register_script_function $function => $cb
		930
		931	Register a function that can be called from within map/npc scripts. The
		932	function should be reasonably secure and should be put into a package name
		933	like the extension.
		934
		935	Example: register a function that gets called whenever a map script calls
		936	C<rent::overview>, as used by the C<rent> extension.
		937
		938	cf::register_script_function "rent::overview" => sub {
		939	...
		940	};
		941
		942	=cut
527		943
528	sub register_script_function {	944	sub register_script_function {
529	my ($fun, $cb) = @_;	945	my ($fun, $cb) = @_;
530		946
531	no strict 'refs';	947	no strict 'refs';
532	*{"ext::$fun"} = $safe_hole->wrap ($cb);	948	*{"safe::$fun"} = $safe_hole->wrap ($cb);
		949	}
		950
		951	=back
		952
		953	=cut
		954
		955	#############################################################################
		956
		957	=head2 EXTENSION DATABASE SUPPORT
		958
		959	Crossfire maintains a very simple database for extension use. It can
		960	currently store anything that can be serialised using Storable, which
		961	excludes objects.
		962
		963	The parameter C<$family> should best start with the name of the extension
		964	using it, it should be unique.
		965
		966	=over 4
		967
		968	=item $hashref = cf::db_get $family
		969
		970	Return a hashref for use by the extension C<$family>, which can be
		971	modified. After modifications, you have to call C<cf::db_dirty> or
		972	C<cf::db_sync>.
		973
		974	=item $value = cf::db_get $family => $key
		975
		976	Returns a single value from the database
		977
		978	=item cf::db_put $family => $hashref
		979
		980	Stores the given family hashref into the database. Updates are delayed, if
		981	you want the data to be synced to disk immediately, use C<cf::db_sync>.
		982
		983	=item cf::db_put $family => $key => $value
		984
		985	Stores the given C<$value> in the family hash. Updates are delayed, if you
		986	want the data to be synced to disk immediately, use C<cf::db_sync>.
		987
		988	=item cf::db_dirty
		989
		990	Marks the database as dirty, to be updated at a later time.
		991
		992	=item cf::db_sync
		993
		994	Immediately write the database to disk I<if it is dirty>.
		995
		996	=cut
		997
		998	our $DB;
		999
		1000	{
		1001	my $path = cf::localdir . "/database.pst";
		1002
		1003	sub db_load() {
		1004	warn "loading database $path\n";#d# remove later
		1005	$DB = stat $path ? Storable::retrieve $path : { };
		1006	}
		1007
		1008	my $pid;
		1009
		1010	sub db_save() {
		1011	warn "saving database $path\n";#d# remove later
		1012	waitpid $pid, 0 if $pid;
		1013	if (0 == ($pid = fork)) {
		1014	$DB->{_meta}{version} = 1;
		1015	Storable::nstore $DB, "$path~";
		1016	rename "$path~", $path;
		1017	cf::_exit 0 if defined $pid;
		1018	}
		1019	}
		1020
		1021	my $dirty;
		1022
		1023	sub db_sync() {
		1024	db_save if $dirty;
		1025	undef $dirty;
		1026	}
		1027
		1028	my $idle = Event->idle (min => $TICK * 2.8, max => 10, repeat => 0, cb => sub {
		1029	db_sync;
		1030	});
		1031
		1032	sub db_dirty() {
		1033	$dirty = 1;
		1034	$idle->start;
		1035	}
		1036
		1037	sub db_get($;$) {
		1038	@_ >= 2
		1039	? $DB->{$_[0]}{$_[1]}
		1040	: ($DB->{$_[0]} ||= { })
		1041	}
		1042
		1043	sub db_put($$;$) {
		1044	if (@_ >= 3) {
		1045	$DB->{$_[0]}{$_[1]} = $_[2];
		1046	} else {
		1047	$DB->{$_[0]} = $_[1];
		1048	}
		1049	db_dirty;
		1050	}
		1051
		1052	attach_global
		1053	prio => 10000,
		1054	on_cleanup => sub {
		1055	db_sync;
		1056	},
		1057	;
533	}	1058	}
534		1059
535	#############################################################################	1060	#############################################################################
536	# the server's main()	1061	# the server's main()
537		1062
538	sub run {	1063	sub cfg_load {
		1064	open my $fh, "<:utf8", cf::confdir . "/config"
		1065	or return;
		1066
		1067	local $/;
		1068	*CFG = YAML::Syck::Load <$fh>;
		1069	}
		1070
		1071	sub main {
		1072	cfg_load;
		1073	db_load;
		1074	load_extensions;
539	Event::loop;	1075	Event::loop;
540	}	1076	}
541		1077
542	#############################################################################	1078	#############################################################################
543	# initialisation	1079	# initialisation
544		1080
		1081	sub _perl_reload(&) {
		1082	my ($msg) = @_;
		1083
		1084	$msg->("reloading...");
		1085
		1086	eval {
		1087	# cancel all watchers
		1088	$_->cancel for Event::all_watchers;
		1089
		1090	# unload all extensions
		1091	for (@exts) {
		1092	$msg->("unloading <$_>");
		1093	unload_extension $_;
		1094	}
		1095
		1096	# unload all modules loaded from $LIBDIR
		1097	while (my ($k, $v) = each %INC) {
		1098	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
		1099
		1100	$msg->("removing <$k>");
		1101	delete $INC{$k};
		1102
		1103	$k =~ s/\.pm$//;
		1104	$k =~ s/\//::/g;
		1105
		1106	if (my $cb = $k->can ("unload_module")) {
		1107	$cb->();
		1108	}
		1109
		1110	Symbol::delete_package $k;
		1111	}
		1112
		1113	# sync database to disk
		1114	cf::db_sync;
		1115
		1116	# get rid of safe::, as good as possible
		1117	Symbol::delete_package "safe::$_"
		1118	for qw(cf::object cf::object::player cf::player cf::map cf::party cf::region);
		1119
		1120	# remove register_script_function callbacks
		1121	# TODO
		1122
		1123	# unload cf.pm "a bit"
		1124	delete $INC{"cf.pm"};
		1125
		1126	# don't, removes xs symbols, too,
		1127	# and global variables created in xs
		1128	#Symbol::delete_package __PACKAGE__;
		1129
		1130	# reload cf.pm
		1131	$msg->("reloading cf.pm");
		1132	require cf;
		1133
		1134	# load config and database again
		1135	cf::cfg_load;
		1136	cf::db_load;
		1137
		1138	# load extensions
		1139	$msg->("load extensions");
		1140	cf::load_extensions;
		1141
		1142	# reattach attachments to objects
		1143	$msg->("reattach");
		1144	_global_reattach;
		1145	};
		1146	$msg->($@) if $@;
		1147
		1148	$msg->("reloaded");
		1149	};
		1150
		1151	sub perl_reload() {
		1152	_perl_reload {
		1153	warn $_[0];
		1154	print "$_[0]\n";
		1155	};
		1156	}
		1157
545	register "<global>", __PACKAGE__;	1158	register "<global>", __PACKAGE__;
546		1159
		1160	register_command "perl-reload" => sub {
		1161	my ($who, $arg) = @_;
		1162
		1163	if ($who->flag (FLAG_WIZ)) {
		1164	_perl_reload {
		1165	warn $_[0];
		1166	$who->message ($_[0]);
		1167	};
		1168	}
		1169	};
		1170
547	unshift @INC, $LIBDIR;	1171	unshift @INC, $LIBDIR;
548		1172
549	load_extensions;
550
551	$TICK_WATCHER = Event->timer (	1173	$TICK_WATCHER = Event->timer (
552	prio => 1,	1174	prio => 1,
		1175	async => 1,
553	at => $NEXT_TICK || 1,	1176	at => $NEXT_TICK || 1,
554	cb => sub {	1177	cb => sub {
555	cf::server_tick; # one server iteration	1178	cf::server_tick; # one server iteration
556		1179
557	my $NOW = Event::time;	1180	my $NOW = Event::time;
558	$NEXT_TICK += $TICK;	1181	$NEXT_TICK += $TICK;
559		1182
560	# if we are delayed by four ticks, skip them all	1183	# if we are delayed by four ticks or more, skip them all
561	$NEXT_TICK = $NOW if $NOW >= $NEXT_TICK + $TICK * 4;	1184	$NEXT_TICK = $NOW if $NOW >= $NEXT_TICK + $TICK * 4;
562		1185
563	$TICK_WATCHER->at ($NEXT_TICK);	1186	$TICK_WATCHER->at ($NEXT_TICK);
564	$TICK_WATCHER->start;	1187	$TICK_WATCHER->start;
565	},	1188	},
566	);	1189	);
567		1190
		1191	IO::AIO::max_poll_time $TICK * 0.2;
		1192
		1193	Event->io (fd => IO::AIO::poll_fileno,
		1194	poll => 'r',
		1195	prio => 5,
		1196	cb => \&IO::AIO::poll_cb);
		1197
568	1	1198	1
569		1199

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