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1 | /* Lua bindings for Newserv */ | |
2 | ||
3 | /* Copyright (C) Chris Porter 2005 */ | |
4 | /* ALL RIGHTS RESERVED. */ | |
5 | /* Don't put this into the SVN repo. */ | |
6 | ||
7 | #include "../core/config.h" | |
8 | #include "../core/error.h" | |
9 | #include "../core/hooks.h" | |
10 | #include "../lib/array.h" | |
11 | #include "../lib/irc_string.h" | |
12 | #include "../core/schedule.h" | |
13 | #include "../lib/version.h" | |
14 | ||
15 | #include "lua.h" | |
16 | ||
17 | MODULE_VERSION(LUA_FULLVERSION); | |
18 | ||
19 | #ifdef LUA_DEBUGSOCKET | |
20 | ||
21 | #include <sys/types.h> | |
22 | #include <sys/socket.h> | |
23 | #include <netinet/in.h> | |
24 | #include <arpa/inet.h> | |
25 | #include <netdb.h> | |
26 | #include <unistd.h> | |
27 | #include <stdarg.h> | |
28 | ||
29 | #endif | |
30 | ||
31 | void lua_startup(void *arg); | |
32 | void lua_loadscripts(void); | |
33 | void lua_registercommands(lua_State *l); | |
34 | void lua_registerdbcommands(lua_State *l); | |
35 | void lua_initnickpusher(void); | |
36 | void lua_initchanpusher(void); | |
37 | void lua_loadlibs(lua_State *l); | |
38 | void lua_require(lua_State *l, char *module); | |
39 | ||
40 | void lua_startbot(void *arg); | |
41 | void lua_destroybot(void); | |
42 | void lua_startcontrol(void); | |
43 | void lua_destroycontrol(void); | |
44 | ||
45 | void lua_onunload(lua_State *l); | |
46 | void lua_onload(lua_State *l); | |
47 | ||
48 | void lua_setpath(lua_State *l); | |
49 | ||
50 | void lua_setupdebugsocket(void); | |
51 | void lua_freedebugsocket(void); | |
52 | ||
53 | void lua_deregisternicks(lua_list *l); | |
54 | void lua_registerlocalcommands(lua_State *ps); | |
55 | void lua_registerdebug(lua_State *ps); | |
56 | void lua_socket_closeall(lua_list *l); | |
57 | void lua_registersocketcommands(lua_State *ps); | |
58 | void lua_registercryptocommands(lua_State *ps); | |
59 | ||
60 | #ifdef LUA_DEBUGSOCKET | |
61 | ||
62 | struct sockaddr_in debugsocketdest; | |
63 | int debugsocket = -1; | |
64 | ||
65 | #endif | |
66 | ||
67 | lua_list *lua_head = NULL, *lua_tail = NULL; | |
68 | ||
69 | sstring *cpath = NULL, *suffix = NULL; | |
70 | ||
71 | void *startsched = NULL; | |
72 | ||
73 | int loaded = 0; | |
74 | ||
75 | struct rusage r_usages; | |
76 | struct rusage r_usagee; | |
77 | ||
78 | static const luaL_Reg ourlibs[] = { | |
79 | {"", luaopen_base}, | |
80 | {LUA_LOADLIBNAME, luaopen_package}, | |
81 | {LUA_TABLIBNAME, luaopen_table}, | |
82 | {LUA_IOLIBNAME, luaopen_io}, | |
83 | {LUA_OSLIBNAME, luaopen_os}, | |
84 | {LUA_STRLIBNAME, luaopen_string}, | |
85 | {LUA_MATHLIBNAME, luaopen_math}, | |
86 | #ifdef LUA_USEJIT | |
87 | {LUA_JITLIBNAME, luaopen_jit}, | |
88 | #endif | |
89 | {NULL, NULL} | |
90 | }; | |
91 | ||
92 | lua_list dummy; | |
93 | ||
94 | void _init() { | |
95 | lua_setupdebugsocket(); | |
96 | lua_initnickpusher(); | |
97 | lua_initchanpusher(); | |
98 | ||
99 | dummy.name = getsstring("???", 10); | |
100 | if(!dummy.name) { | |
101 | Error("lua", ERR_ERROR, "Cannot set dummy name."); | |
102 | return; | |
103 | } | |
104 | ||
105 | cpath = getcopyconfigitem("lua", "scriptdir", "", 500); | |
106 | ||
107 | if(!cpath || !cpath->content || !cpath->content[0]) { | |
108 | Error("lua", ERR_ERROR, "Error loading path."); | |
109 | return; | |
110 | } | |
111 | ||
112 | suffix = getcopyconfigitem("lua", "scriptsuffix", ".lua", 10); | |
113 | if(!suffix) { | |
114 | Error("lua", ERR_ERROR, "Error loading suffix."); | |
115 | return; | |
116 | } | |
117 | ||
118 | loaded = 1; | |
119 | ||
120 | startsched = scheduleoneshot(time(NULL) + 1, &lua_startup, NULL); | |
121 | } | |
122 | ||
123 | void lua_startup(void *arg) { | |
124 | startsched = NULL; | |
125 | ||
126 | lua_startcontrol(); | |
127 | lua_startbot(NULL); | |
128 | ||
129 | lua_loadscripts(); | |
130 | } | |
131 | ||
132 | #ifdef BROKEN_DLCLOSE | |
133 | void __fini() { | |
134 | #else | |
135 | void _fini() { | |
136 | #endif | |
137 | ||
138 | if(loaded) { | |
139 | if(startsched) | |
140 | deleteschedule(startsched, &lua_startup, NULL); | |
141 | ||
142 | while(lua_head) | |
143 | lua_unloadscript(lua_head); | |
144 | ||
145 | lua_destroybot(); | |
146 | lua_destroycontrol(); | |
147 | } | |
148 | ||
149 | freesstring(cpath); | |
150 | freesstring(suffix); | |
151 | freesstring(dummy.name); | |
152 | ||
153 | lua_freedebugsocket(); | |
154 | nscheckfreeall(POOL_LUA); | |
155 | } | |
156 | ||
157 | void lua_loadscripts(void) { | |
158 | array *ls; | |
159 | ||
160 | ls = getconfigitems("lua", "script"); | |
161 | if(!ls) { | |
162 | Error("lua", ERR_INFO, "No scripts loaded."); | |
163 | } else { | |
164 | sstring **scripts = (sstring **)(ls->content); | |
165 | int i; | |
166 | for(i=0;i<ls->cursi;i++) | |
167 | lua_loadscript(scripts[i]->content); | |
168 | } | |
169 | } | |
170 | ||
171 | /* taken from the lua manual, modified to use nsmalloc */ | |
172 | static void *lua_nsmalloc(void *ud, void *ptr, size_t osize, size_t nsize) { | |
173 | if(nsize == 0) { | |
174 | if(ptr != NULL) | |
175 | luafree(ptr); | |
176 | return NULL; | |
177 | } | |
178 | ||
179 | return luarealloc(ptr, nsize); | |
180 | } | |
181 | ||
182 | lua_State *lua_loadscript(char *file) { | |
183 | char fullpath[LUA_PATHLEN]; | |
184 | int top; | |
185 | lua_State *l; | |
186 | lua_list *n; | |
187 | ||
188 | if(!cpath || !suffix) | |
189 | return NULL; | |
190 | ||
191 | delchars(file, "./\\;"); | |
192 | ||
193 | if(lua_scriptloaded(file)) | |
194 | return NULL; | |
195 | ||
196 | l = lua_newstate(lua_nsmalloc, NULL); | |
197 | if(!l) | |
198 | return NULL; | |
199 | ||
200 | n = (lua_list *)luamalloc(sizeof(lua_list));; | |
201 | if(!n) { | |
202 | Error("lua", ERR_ERROR, "Error allocing list for %s.", file); | |
203 | return NULL; | |
204 | } | |
205 | ||
206 | n->name = getsstring(file, LUA_PATHLEN); | |
207 | if(!n->name) { | |
208 | Error("lua", ERR_ERROR, "Error allocing name item for %s.", file); | |
209 | luafree(n); | |
210 | return NULL; | |
211 | } | |
212 | n->calls = 0; | |
213 | ||
214 | timerclear(&n->ru_utime); | |
215 | timerclear(&n->ru_stime); | |
216 | ||
217 | lua_loadlibs(l); | |
218 | lua_registerdebug(l); | |
219 | lua_registercommands(l); | |
220 | lua_registerlocalcommands(l); | |
221 | lua_registerdbcommands(l); | |
222 | lua_registersocketcommands(l); | |
223 | lua_registercryptocommands(l); | |
224 | ||
225 | lua_setpath(l); | |
226 | ||
227 | #ifdef LUA_USEJIT | |
228 | lua_require(l, "lib/jit"); | |
229 | #endif | |
230 | ||
231 | lua_require(l, "lib/bootstrap"); | |
232 | ||
233 | snprintf(fullpath, sizeof(fullpath), "%s/%s%s", cpath->content, file, suffix->content); | |
234 | if(luaL_loadfile(l, fullpath)) { | |
235 | Error("lua", ERR_ERROR, "Error loading %s.", file); | |
236 | lua_close(l); | |
237 | freesstring(n->name); | |
238 | luafree(n); | |
239 | return NULL; | |
240 | } | |
241 | ||
242 | n->l = l; | |
243 | ||
244 | n->next = NULL; | |
245 | n->prev = lua_tail; | |
246 | n->nicks = NULL; | |
247 | n->sockets = NULL; | |
248 | ||
249 | if(!lua_head) { | |
250 | lua_head = n; | |
251 | } else { | |
252 | lua_tail->next = n; | |
253 | } | |
254 | ||
255 | lua_tail = n; | |
256 | ||
257 | top = lua_gettop(l); | |
258 | ||
259 | if(lua_pcall(l, 0, 0, 0)) { | |
260 | Error("lua", ERR_ERROR, "Error pcalling: %s.", file); | |
261 | lua_close(l); | |
262 | freesstring(n->name); | |
263 | luafree(n); | |
264 | return NULL; | |
265 | } | |
266 | ||
267 | lua_settop(l, top); | |
268 | ||
269 | Error("lua", ERR_INFO, "Loaded %s.", file); | |
270 | lua_onload(l); | |
271 | ||
272 | return l; | |
273 | } | |
274 | ||
275 | void lua_unloadscript(lua_list *l) { | |
276 | lua_onunload(l->l); | |
277 | lua_deregisternicks(l); | |
278 | lua_socket_closeall(l); | |
279 | lua_close(l->l); | |
280 | freesstring(l->name); | |
281 | ||
282 | /* well, at least it's O(1) */ | |
283 | ||
284 | if(!l->prev) { /* head */ | |
285 | lua_head = l->next; | |
286 | if(!lua_head) { | |
287 | lua_tail = NULL; | |
288 | } else { | |
289 | lua_head->prev = NULL; | |
290 | } | |
291 | } else { | |
292 | if(!l->next) { /* tail */ | |
293 | lua_tail = lua_tail->prev; | |
294 | if(!lua_tail) { | |
295 | lua_head = NULL; | |
296 | } else { | |
297 | lua_tail->next = NULL; | |
298 | } | |
299 | } else { | |
300 | l->prev->next = l->next; | |
301 | l->next->prev = l->prev; | |
302 | } | |
303 | } | |
304 | ||
305 | luafree(l); | |
306 | } | |
307 | ||
308 | void lua_setpath(lua_State *l) { | |
309 | char fullpath[LUA_PATHLEN], *prev = NULL; | |
310 | ||
311 | int top = lua_gettop(l); | |
312 | ||
313 | lua_getglobal(l, "package"); | |
314 | if(!lua_istable(l, 1)) { | |
315 | Error("lua", ERR_ERROR, "Unable to set package.path (package is not a table)."); | |
316 | return; | |
317 | } | |
318 | ||
319 | lua_pushstring(l, "path"); | |
320 | lua_gettable(l, -2); | |
321 | ||
322 | if(lua_isstring(l, -1)) | |
323 | prev = (char *)lua_tostring(l, -1); | |
324 | ||
325 | if(prev) { | |
326 | snprintf(fullpath, sizeof(fullpath), "%s;%s/?%s", prev, cpath->content, suffix->content); | |
327 | } else { | |
328 | snprintf(fullpath, sizeof(fullpath), "%s/?%s", cpath->content, suffix->content); | |
329 | } | |
330 | ||
331 | /* pop broke! */ | |
332 | ||
333 | lua_getglobal(l, "package"); | |
334 | if(!lua_istable(l, 1)) { | |
335 | Error("lua", ERR_ERROR, "Unable to set package.path (package is not a table)."); | |
336 | return; | |
337 | } | |
338 | ||
339 | lua_pushstring(l, "path"); | |
340 | ||
341 | lua_pushstring(l, fullpath); | |
342 | lua_settable(l, -3); | |
343 | ||
344 | lua_settop(l, top); | |
345 | } | |
346 | ||
347 | lua_list *lua_scriptloaded(char *name) { | |
348 | lua_list *l; | |
349 | ||
350 | for(l=lua_head;l;l=l->next) | |
351 | if(!strcmp(l->name->content, name)) | |
352 | return l; | |
353 | ||
354 | return NULL; | |
355 | } | |
356 | ||
357 | void lua_loadlibs(lua_State *l) { | |
358 | const luaL_Reg *lib = ourlibs; | |
359 | ||
360 | for (;lib->func;lib++) { | |
361 | lua_pushcfunction(l, lib->func); | |
362 | lua_pushstring(l, lib->name); | |
363 | lua_call(l, 1, 0); | |
364 | } | |
365 | } | |
366 | ||
367 | void lua_require(lua_State *l, char *module) { | |
368 | int top = lua_gettop(l); | |
369 | ||
370 | lua_getglobal(l, "require"); | |
371 | lua_pushstring(l, module); | |
372 | ||
373 | if(lua_pcall(l, 1, 1, 0)) | |
374 | Error("lua", ERR_ERROR, "Error requiring %s: %s", module, lua_tostring(l, -1)); | |
375 | ||
376 | lua_settop(l, top); | |
377 | } | |
378 | ||
379 | void lua_setupdebugsocket(void) { | |
380 | #ifdef LUA_DEBUGSOCKET | |
381 | ||
382 | debugsocket = socket(AF_INET, SOCK_DGRAM, 0); | |
383 | if(debugsocket < 0) { | |
384 | debugsocket = -1; | |
385 | Error("lua", ERR_ERROR, "Cannot create debug socket."); | |
386 | ||
387 | return; | |
388 | } | |
389 | ||
390 | memset(&debugsocketdest, 0, sizeof(debugsocketdest)); | |
391 | ||
392 | debugsocketdest.sin_family = AF_INET; | |
393 | debugsocketdest.sin_port = htons(LUA_DEBUGSOCKET_PORT); | |
394 | debugsocketdest.sin_addr.s_addr = inet_addr(LUA_DEBUGSOCKET_ADDRESS); | |
395 | ||
396 | #endif | |
397 | } | |
398 | ||
399 | void lua_freedebugsocket(void) { | |
400 | #ifdef LUA_DEBUGSOCKET | |
401 | ||
402 | if(debugsocket == -1) | |
403 | return; | |
404 | ||
405 | close(debugsocket); | |
406 | ||
407 | ||
408 | debugsocket = -1; | |
409 | ||
410 | #endif | |
411 | } | |
412 | ||
413 | #ifdef LUA_DEBUGSOCKET | |
414 | void lua_debugoutput(char *format, ...) { | |
415 | char buf[1024]; | |
416 | va_list va; | |
417 | int size; | |
418 | ||
419 | if(debugsocket == -1) | |
420 | return; | |
421 | ||
422 | va_start(va, format); | |
423 | size = vsnprintf(buf, sizeof(buf), format, va); | |
424 | va_end(va); | |
425 | ||
426 | if(size >= sizeof(buf)) | |
427 | size = sizeof(buf) - 1; | |
428 | ||
429 | if(size > 0) | |
430 | sendto(debugsocket, buf, size, 0, (struct sockaddr *)&debugsocketdest, sizeof(debugsocketdest)); | |
431 | } | |
432 | #endif | |
433 | ||
434 | lua_list *lua_listfromstate(lua_State *l) { | |
435 | lua_list *i = lua_head; | |
436 | for(;i;i=i->next) | |
437 | if(i->l == l) | |
438 | return i; | |
439 | ||
440 | return &dummy; | |
441 | } | |
442 | ||
443 | int lua_listexists(lua_list *l) { | |
444 | lua_list *i; | |
445 | ||
446 | for(i=lua_head;i;i=i->next) | |
447 | if(i == l) | |
448 | return 1; | |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
453 | int lua_lineok(const char *data) { | |
454 | if(strchr(data, '\r') || strchr(data, '\n')) | |
455 | return 0; | |
456 | return 1; | |
457 | } | |
458 | ||
459 | INLINE int lua_debugpcall(lua_State *l, char *message, int a, int b, int c) { | |
460 | lua_list *l2 = lua_listfromstate(l); | |
461 | int ret; | |
462 | ||
463 | #ifdef LUA_DEBUGSOCKET | |
464 | DEBUGOUT("%s: %s\n", l2->name->content, message); | |
465 | #endif | |
466 | ||
467 | #ifdef LUA_PROFILE | |
468 | ACCOUNTING_START(l2); | |
469 | #endif | |
470 | ||
471 | ret = lua_pcall(l, a, b, c); | |
472 | ||
473 | #ifdef LUA_PROFILE | |
474 | ACCOUNTING_STOP(l2); | |
475 | #endif | |
476 | ||
477 | return ret; | |
478 | } | |
479 |