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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 | #define _POSIX_C_SOURCE 200112L | |
8 | #include <stdlib.h> | |
9 | ||
10 | #include "../core/config.h" | |
11 | #include "../core/error.h" | |
12 | #include "../core/hooks.h" | |
13 | #include "../lib/array.h" | |
14 | #include "../lib/irc_string.h" | |
15 | #include "../core/schedule.h" | |
16 | #include "../lib/version.h" | |
17 | #include "../lib/strlfunc.h" | |
18 | #include "lua.h" | |
19 | ||
20 | MODULE_VERSION(LUA_SMALLVERSION); | |
21 | ||
22 | #ifdef LUA_DEBUGSOCKET | |
23 | ||
24 | #include <sys/types.h> | |
25 | #include <sys/socket.h> | |
26 | #include <netinet/in.h> | |
27 | #include <arpa/inet.h> | |
28 | #include <netdb.h> | |
29 | #include <unistd.h> | |
30 | #include <stdarg.h> | |
31 | ||
32 | #endif | |
33 | ||
34 | void lua_startup(void *arg); | |
35 | void lua_loadscripts(void); | |
36 | void lua_registercommands(lua_State *l); | |
37 | void lua_registerdbcommands(lua_State *l); | |
38 | void lua_initnickpusher(void); | |
39 | void lua_initchanpusher(void); | |
40 | void lua_loadlibs(lua_State *l); | |
41 | void lua_require(lua_State *l, char *module); | |
42 | ||
43 | void lua_startbot(void *arg); | |
44 | void lua_destroybot(void); | |
45 | void lua_startcontrol(void); | |
46 | void lua_destroycontrol(void); | |
47 | ||
48 | void lua_onunload(lua_State *l); | |
49 | void lua_onload(lua_State *l); | |
50 | ||
51 | void lua_setpath(void); | |
52 | ||
53 | void lua_setupdebugsocket(void); | |
54 | void lua_freedebugsocket(void); | |
55 | ||
56 | void lua_deregisternicks(lua_list *l); | |
57 | void lua_registerlocalcommands(lua_State *ps); | |
58 | void lua_registerdebug(lua_State *ps); | |
59 | void lua_socket_closeall(lua_list *l); | |
60 | void lua_registersocketcommands(lua_State *ps); | |
61 | void lua_registercryptocommands(lua_State *ps); | |
62 | ||
63 | #ifdef LUA_DEBUGSOCKET | |
64 | ||
65 | struct sockaddr_in debugsocketdest; | |
66 | int debugsocket = -1; | |
67 | ||
68 | #endif | |
69 | ||
70 | lua_list *lua_head = NULL, *lua_tail = NULL; | |
71 | ||
72 | sstring *cpath = NULL, *suffix = NULL; | |
73 | ||
74 | void *startsched = NULL; | |
75 | ||
76 | int loaded = 0; | |
77 | ||
78 | struct rusage r_usages; | |
79 | struct rusage r_usagee; | |
80 | ||
81 | static const luaL_Reg ourlibs[] = { | |
82 | {"", luaopen_base}, | |
83 | {LUA_LOADLIBNAME, luaopen_package}, | |
84 | {LUA_TABLIBNAME, luaopen_table}, | |
85 | {LUA_IOLIBNAME, luaopen_io}, | |
86 | {LUA_OSLIBNAME, luaopen_os}, | |
87 | {LUA_STRLIBNAME, luaopen_string}, | |
88 | {LUA_MATHLIBNAME, luaopen_math}, | |
89 | #ifdef LUA_USEJIT | |
90 | {LUA_JITLIBNAME, luaopen_jit}, | |
91 | #endif | |
92 | {NULL, NULL} | |
93 | }; | |
94 | ||
95 | lua_list dummy; | |
96 | ||
97 | void _init() { | |
98 | lua_setupdebugsocket(); | |
99 | lua_initnickpusher(); | |
100 | lua_initchanpusher(); | |
101 | ||
102 | dummy.name = getsstring("???", 10); | |
103 | if(!dummy.name) { | |
104 | Error("lua", ERR_ERROR, "Cannot set dummy name."); | |
105 | return; | |
106 | } | |
107 | ||
108 | cpath = getcopyconfigitem("lua", "scriptdir", "", 500); | |
109 | ||
110 | if(!cpath || !cpath->content || !cpath->content[0]) { | |
111 | Error("lua", ERR_ERROR, "Error loading path."); | |
112 | return; | |
113 | } | |
114 | ||
115 | suffix = getcopyconfigitem("lua", "scriptsuffix", ".lua", 10); | |
116 | if(!suffix) { | |
117 | Error("lua", ERR_ERROR, "Error loading suffix."); | |
118 | return; | |
119 | } | |
120 | ||
121 | lua_setpath(); | |
122 | ||
123 | loaded = 1; | |
124 | ||
125 | startsched = scheduleoneshot(time(NULL) + 1, &lua_startup, NULL); | |
126 | } | |
127 | ||
128 | void lua_startup(void *arg) { | |
129 | startsched = NULL; | |
130 | ||
131 | lua_startcontrol(); | |
132 | lua_startbot(NULL); | |
133 | ||
134 | lua_loadscripts(); | |
135 | } | |
136 | ||
137 | #ifdef BROKEN_DLCLOSE | |
138 | void __fini() { | |
139 | #else | |
140 | void _fini() { | |
141 | #endif | |
142 | ||
143 | if(loaded) { | |
144 | if(startsched) | |
145 | deleteschedule(startsched, &lua_startup, NULL); | |
146 | ||
147 | while(lua_head) | |
148 | lua_unloadscript(lua_head); | |
149 | ||
150 | lua_destroybot(); | |
151 | lua_destroycontrol(); | |
152 | } | |
153 | ||
154 | freesstring(cpath); | |
155 | freesstring(suffix); | |
156 | freesstring(dummy.name); | |
157 | ||
158 | lua_freedebugsocket(); | |
159 | nscheckfreeall(POOL_LUA); | |
160 | } | |
161 | ||
162 | void lua_loadscripts(void) { | |
163 | array *ls; | |
164 | ||
165 | ls = getconfigitems("lua", "script"); | |
166 | if(!ls) { | |
167 | Error("lua", ERR_INFO, "No scripts loaded."); | |
168 | } else { | |
169 | sstring **scripts = (sstring **)(ls->content); | |
170 | int i; | |
171 | for(i=0;i<ls->cursi;i++) | |
172 | lua_loadscript(scripts[i]->content); | |
173 | } | |
174 | } | |
175 | ||
176 | /* taken from the lua manual, modified to use nsmalloc */ | |
177 | static void *lua_nsmalloc(void *ud, void *ptr, size_t osize, size_t nsize) { | |
178 | if(nsize == 0) { | |
179 | if(ptr != NULL) | |
180 | luafree(ptr); | |
181 | return NULL; | |
182 | } | |
183 | ||
184 | return luarealloc(ptr, nsize); | |
185 | } | |
186 | ||
187 | lua_State *lua_loadscript(char *file) { | |
188 | char fullpath[LUA_PATHLEN]; | |
189 | int top; | |
190 | lua_State *l; | |
191 | lua_list *n; | |
192 | char buf[1024]; | |
193 | ||
194 | if(!cpath || !suffix) | |
195 | return NULL; | |
196 | ||
197 | strlcpy(buf, file, sizeof(buf)); | |
198 | ||
199 | delchars(buf, "./\\;"); | |
200 | ||
201 | if(lua_scriptloaded(buf)) | |
202 | return NULL; | |
203 | ||
204 | l = lua_newstate(lua_nsmalloc, NULL); | |
205 | if(!l) | |
206 | return NULL; | |
207 | ||
208 | n = (lua_list *)luamalloc(sizeof(lua_list));; | |
209 | if(!n) { | |
210 | Error("lua", ERR_ERROR, "Error allocing list for %s.", buf); | |
211 | return NULL; | |
212 | } | |
213 | ||
214 | n->name = getsstring(buf, LUA_PATHLEN); | |
215 | if(!n->name) { | |
216 | Error("lua", ERR_ERROR, "Error allocing name item for %s.", buf); | |
217 | luafree(n); | |
218 | return NULL; | |
219 | } | |
220 | n->calls = 0; | |
221 | ||
222 | timerclear(&n->ru_utime); | |
223 | timerclear(&n->ru_stime); | |
224 | ||
225 | lua_loadlibs(l); | |
226 | lua_registerdebug(l); | |
227 | lua_registercommands(l); | |
228 | lua_registerlocalcommands(l); | |
229 | lua_registerdbcommands(l); | |
230 | lua_registersocketcommands(l); | |
231 | lua_registercryptocommands(l); | |
232 | ||
233 | #ifdef LUA_USEJIT | |
234 | lua_require(l, "lib/jit"); | |
235 | #endif | |
236 | ||
237 | lua_require(l, "lib/bootstrap"); | |
238 | ||
239 | snprintf(fullpath, sizeof(fullpath), "%s/%s%s", cpath->content, file, suffix->content); | |
240 | if(luaL_loadfile(l, fullpath)) { | |
241 | Error("lua", ERR_ERROR, "Error loading %s.", file); | |
242 | lua_close(l); | |
243 | freesstring(n->name); | |
244 | luafree(n); | |
245 | return NULL; | |
246 | } | |
247 | ||
248 | n->l = l; | |
249 | ||
250 | n->next = NULL; | |
251 | n->prev = lua_tail; | |
252 | n->nicks = NULL; | |
253 | n->sockets = NULL; | |
254 | ||
255 | if(!lua_head) { | |
256 | lua_head = n; | |
257 | } else { | |
258 | lua_tail->next = n; | |
259 | } | |
260 | ||
261 | lua_tail = n; | |
262 | ||
263 | top = lua_gettop(l); | |
264 | ||
265 | if(lua_pcall(l, 0, 0, 0)) { | |
266 | Error("lua", ERR_ERROR, "Error pcalling: %s.", file); | |
267 | lua_close(l); | |
268 | freesstring(n->name); | |
269 | ||
270 | if(lua_head == n) | |
271 | lua_head = NULL; | |
272 | ||
273 | lua_tail = n->prev; | |
274 | if(lua_tail) | |
275 | lua_tail->next = NULL; | |
276 | ||
277 | luafree(n); | |
278 | return NULL; | |
279 | } | |
280 | ||
281 | lua_settop(l, top); | |
282 | ||
283 | Error("lua", ERR_INFO, "Loaded %s.", file); | |
284 | lua_onload(l); | |
285 | ||
286 | return l; | |
287 | } | |
288 | ||
289 | void lua_unloadscript(lua_list *l) { | |
290 | lua_onunload(l->l); | |
291 | lua_deregisternicks(l); | |
292 | lua_socket_closeall(l); | |
293 | lua_close(l->l); | |
294 | freesstring(l->name); | |
295 | ||
296 | /* well, at least it's O(1) */ | |
297 | ||
298 | if(!l->prev) { /* head */ | |
299 | lua_head = l->next; | |
300 | if(!lua_head) { | |
301 | lua_tail = NULL; | |
302 | } else { | |
303 | lua_head->prev = NULL; | |
304 | } | |
305 | } else { | |
306 | if(!l->next) { /* tail */ | |
307 | lua_tail = lua_tail->prev; | |
308 | if(!lua_tail) { | |
309 | lua_head = NULL; | |
310 | } else { | |
311 | lua_tail->next = NULL; | |
312 | } | |
313 | } else { | |
314 | l->prev->next = l->next; | |
315 | l->next->prev = l->prev; | |
316 | } | |
317 | } | |
318 | ||
319 | luafree(l); | |
320 | } | |
321 | ||
322 | void lua_setpath(void) { | |
323 | char fullpath[LUA_PATHLEN]; | |
324 | ||
325 | snprintf(fullpath, sizeof(fullpath), "%s/?%s", cpath->content, suffix->content); | |
326 | setenv("LUA_PATH", fullpath, 1); | |
327 | } | |
328 | ||
329 | lua_list *lua_scriptloaded(char *name) { | |
330 | lua_list *l; | |
331 | ||
332 | for(l=lua_head;l;l=l->next) | |
333 | if(!strcmp(l->name->content, name)) | |
334 | return l; | |
335 | ||
336 | return NULL; | |
337 | } | |
338 | ||
339 | void lua_loadlibs(lua_State *l) { | |
340 | const luaL_Reg *lib = ourlibs; | |
341 | ||
342 | for (;lib->func;lib++) { | |
343 | lua_pushcfunction(l, lib->func); | |
344 | lua_pushstring(l, lib->name); | |
345 | lua_call(l, 1, 0); | |
346 | } | |
347 | } | |
348 | ||
349 | void lua_require(lua_State *l, char *module) { | |
350 | int top = lua_gettop(l); | |
351 | ||
352 | lua_getglobal(l, "require"); | |
353 | lua_pushstring(l, module); | |
354 | ||
355 | if(lua_pcall(l, 1, 1, 0)) | |
356 | Error("lua", ERR_ERROR, "Error requiring %s: %s", module, lua_tostring(l, -1)); | |
357 | ||
358 | lua_settop(l, top); | |
359 | } | |
360 | ||
361 | void lua_setupdebugsocket(void) { | |
362 | #ifdef LUA_DEBUGSOCKET | |
363 | ||
364 | debugsocket = socket(AF_INET, SOCK_DGRAM, 0); | |
365 | if(debugsocket < 0) { | |
366 | debugsocket = -1; | |
367 | Error("lua", ERR_ERROR, "Cannot create debug socket."); | |
368 | ||
369 | return; | |
370 | } | |
371 | ||
372 | memset(&debugsocketdest, 0, sizeof(debugsocketdest)); | |
373 | ||
374 | debugsocketdest.sin_family = AF_INET; | |
375 | debugsocketdest.sin_port = htons(LUA_DEBUGSOCKET_PORT); | |
376 | debugsocketdest.sin_addr.s_addr = inet_addr(LUA_DEBUGSOCKET_ADDRESS); | |
377 | ||
378 | #endif | |
379 | } | |
380 | ||
381 | void lua_freedebugsocket(void) { | |
382 | #ifdef LUA_DEBUGSOCKET | |
383 | ||
384 | if(debugsocket == -1) | |
385 | return; | |
386 | ||
387 | close(debugsocket); | |
388 | ||
389 | ||
390 | debugsocket = -1; | |
391 | ||
392 | #endif | |
393 | } | |
394 | ||
395 | #ifdef LUA_DEBUGSOCKET | |
396 | void lua_debugoutput(char *format, ...) { | |
397 | char buf[1024]; | |
398 | va_list va; | |
399 | int size; | |
400 | ||
401 | if(debugsocket == -1) | |
402 | return; | |
403 | ||
404 | va_start(va, format); | |
405 | size = vsnprintf(buf, sizeof(buf), format, va); | |
406 | va_end(va); | |
407 | ||
408 | if(size >= sizeof(buf)) | |
409 | size = sizeof(buf) - 1; | |
410 | ||
411 | if(size > 0) | |
412 | sendto(debugsocket, buf, size, 0, (struct sockaddr *)&debugsocketdest, sizeof(debugsocketdest)); | |
413 | } | |
414 | #endif | |
415 | ||
416 | lua_list *lua_listfromstate(lua_State *l) { | |
417 | lua_list *i = lua_head; | |
418 | for(;i;i=i->next) | |
419 | if(i->l == l) | |
420 | return i; | |
421 | ||
422 | return &dummy; | |
423 | } | |
424 | ||
425 | int lua_listexists(lua_list *l) { | |
426 | lua_list *i; | |
427 | ||
428 | for(i=lua_head;i;i=i->next) | |
429 | if(i == l) | |
430 | return 1; | |
431 | ||
432 | return 0; | |
433 | } | |
434 | ||
435 | int lua_lineok(const char *data) { | |
436 | if(strchr(data, '\r') || strchr(data, '\n')) | |
437 | return 0; | |
438 | return 1; | |
439 | } | |
440 | ||
441 | int lua_debugpcall(lua_State *l, char *message, int a, int b, int c) { | |
442 | lua_list *l2 = lua_listfromstate(l); | |
443 | int ret; | |
444 | ||
445 | #ifdef LUA_DEBUGSOCKET | |
446 | DEBUGOUT("%s: %s\n", l2->name->content, message); | |
447 | #endif | |
448 | ||
449 | #ifdef LUA_PROFILE | |
450 | ACCOUNTING_START(l2); | |
451 | #endif | |
452 | ||
453 | ret = lua_pcall(l, a, b, c); | |
454 | ||
455 | #ifdef LUA_PROFILE | |
456 | ACCOUNTING_STOP(l2); | |
457 | #endif | |
458 | ||
459 | return ret; | |
460 | } | |
461 |