| 1 |
/* |
| 2 |
* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd). |
| 3 |
* modules.c: A module loader. |
| 4 |
* |
| 5 |
* Copyright (C) 2002 by the past and present ircd coders, and others. |
| 6 |
* |
| 7 |
* This program is free software; you can redistribute it and/or modify |
| 8 |
* it under the terms of the GNU General Public License as published by |
| 9 |
* the Free Software Foundation; either version 2 of the License, or |
| 10 |
* (at your option) any later version. |
| 11 |
* |
| 12 |
* This program is distributed in the hope that it will be useful, |
| 13 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 |
* GNU General Public License for more details. |
| 16 |
* |
| 17 |
* You should have received a copy of the GNU General Public License |
| 18 |
* along with this program; if not, write to the Free Software |
| 19 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
| 20 |
* USA |
| 21 |
* |
| 22 |
* $Id$ |
| 23 |
*/ |
| 24 |
|
| 25 |
#include "stdinc.h" |
| 26 |
#include "tools.h" |
| 27 |
#include "modules.h" |
| 28 |
#include "s_log.h" |
| 29 |
#include "ircd.h" |
| 30 |
#include "client.h" |
| 31 |
#include "send.h" |
| 32 |
#include "s_conf.h" |
| 33 |
#include "handlers.h" |
| 34 |
#include "numeric.h" |
| 35 |
#include "parse.h" |
| 36 |
#include "ircd_defs.h" |
| 37 |
#include "irc_string.h" |
| 38 |
#include "memory.h" |
| 39 |
#include "list.h" |
| 40 |
|
| 41 |
|
| 42 |
dlink_list mod_list = { NULL, NULL, 0 }; |
| 43 |
|
| 44 |
static const char *core_module_table[] = |
| 45 |
{ |
| 46 |
"m_die.la", |
| 47 |
"m_error.la", |
| 48 |
"m_join.la", |
| 49 |
"m_kick.la", |
| 50 |
"m_kill.la", |
| 51 |
"m_message.la", |
| 52 |
"m_mode.la", |
| 53 |
"m_nick.la", |
| 54 |
"m_part.la", |
| 55 |
"m_quit.la", |
| 56 |
"m_server.la", |
| 57 |
"m_sjoin.la", |
| 58 |
"m_squit.la", |
| 59 |
NULL |
| 60 |
}; |
| 61 |
|
| 62 |
static dlink_list mod_paths = { NULL, NULL, 0 }; |
| 63 |
static dlink_list conf_modules = { NULL, NULL, 0 }; |
| 64 |
|
| 65 |
static void mo_modload(struct Client *, struct Client *, int, char *[]); |
| 66 |
static void mo_modlist(struct Client *, struct Client *, int, char *[]); |
| 67 |
static void mo_modreload(struct Client *, struct Client *, int, char *[]); |
| 68 |
static void mo_modunload(struct Client *, struct Client *, int, char *[]); |
| 69 |
static void mo_modrestart(struct Client *, struct Client *, int, char *[]); |
| 70 |
|
| 71 |
struct Message modload_msgtab = { |
| 72 |
"MODLOAD", 0, 0, 2, 0, MFLG_SLOW, 0, |
| 73 |
{m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modload, m_ignore} |
| 74 |
}; |
| 75 |
|
| 76 |
struct Message modunload_msgtab = { |
| 77 |
"MODUNLOAD", 0, 0, 2, 0, MFLG_SLOW, 0, |
| 78 |
{m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modunload, m_ignore} |
| 79 |
}; |
| 80 |
|
| 81 |
struct Message modreload_msgtab = { |
| 82 |
"MODRELOAD", 0, 0, 2, 0, MFLG_SLOW, 0, |
| 83 |
{m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modreload, m_ignore} |
| 84 |
}; |
| 85 |
|
| 86 |
struct Message modlist_msgtab = { |
| 87 |
"MODLIST", 0, 0, 0, 0, MFLG_SLOW, 0, |
| 88 |
{m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modlist, m_ignore} |
| 89 |
}; |
| 90 |
|
| 91 |
struct Message modrestart_msgtab = { |
| 92 |
"MODRESTART", 0, 0, 0, 0, MFLG_SLOW, 0, |
| 93 |
{m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modrestart, m_ignore} |
| 94 |
}; |
| 95 |
|
| 96 |
|
| 97 |
extern struct Message error_msgtab; |
| 98 |
|
| 99 |
/* |
| 100 |
* modules_init |
| 101 |
* |
| 102 |
* input - NONE |
| 103 |
* output - NONE |
| 104 |
* side effects - The basic module manipulation modules are loaded |
| 105 |
*/ |
| 106 |
void |
| 107 |
modules_init(void) |
| 108 |
{ |
| 109 |
dynlink_init(); |
| 110 |
|
| 111 |
mod_add_cmd(&modload_msgtab); |
| 112 |
mod_add_cmd(&modunload_msgtab); |
| 113 |
mod_add_cmd(&modreload_msgtab); |
| 114 |
mod_add_cmd(&modlist_msgtab); |
| 115 |
mod_add_cmd(&modrestart_msgtab); |
| 116 |
} |
| 117 |
|
| 118 |
/* mod_find_path() |
| 119 |
* |
| 120 |
* input - path |
| 121 |
* output - none |
| 122 |
* side effects - returns a module path from path |
| 123 |
*/ |
| 124 |
static struct module_path * |
| 125 |
mod_find_path(const char *path) |
| 126 |
{ |
| 127 |
dlink_node *ptr; |
| 128 |
struct module_path *mpath; |
| 129 |
|
| 130 |
DLINK_FOREACH(ptr, mod_paths.head) |
| 131 |
{ |
| 132 |
mpath = ptr->data; |
| 133 |
|
| 134 |
if (!strcmp(path, mpath->path)) |
| 135 |
return mpath; |
| 136 |
} |
| 137 |
|
| 138 |
return NULL; |
| 139 |
} |
| 140 |
|
| 141 |
/* mod_add_path() |
| 142 |
* |
| 143 |
* input - path |
| 144 |
* output - NONE |
| 145 |
* side effects - adds path to list |
| 146 |
*/ |
| 147 |
void |
| 148 |
mod_add_path(const char *path) |
| 149 |
{ |
| 150 |
struct module_path *pathst; |
| 151 |
|
| 152 |
if (mod_find_path(path)) |
| 153 |
return; |
| 154 |
|
| 155 |
pathst = MyMalloc(sizeof(struct module_path)); |
| 156 |
|
| 157 |
strlcpy(pathst->path, path, sizeof(pathst->path)); |
| 158 |
dlinkAdd(pathst, &pathst->node, &mod_paths); |
| 159 |
} |
| 160 |
|
| 161 |
/* add_conf_module |
| 162 |
* |
| 163 |
* input - module name |
| 164 |
* output - NONE |
| 165 |
* side effects - adds module to conf_mod |
| 166 |
*/ |
| 167 |
void |
| 168 |
add_conf_module(const char *name) |
| 169 |
{ |
| 170 |
struct module_path *pathst; |
| 171 |
|
| 172 |
pathst = MyMalloc(sizeof(struct module_path)); |
| 173 |
|
| 174 |
strlcpy(pathst->path, name, sizeof(pathst->path)); |
| 175 |
dlinkAdd(pathst, &pathst->node, &conf_modules); |
| 176 |
} |
| 177 |
|
| 178 |
/* mod_clear_paths() |
| 179 |
* |
| 180 |
* input - NONE |
| 181 |
* output - NONE |
| 182 |
* side effects - clear the lists of paths and conf modules |
| 183 |
*/ |
| 184 |
void |
| 185 |
mod_clear_paths(void) |
| 186 |
{ |
| 187 |
struct module_path *pathst; |
| 188 |
dlink_node *ptr; |
| 189 |
dlink_node *next_ptr; |
| 190 |
|
| 191 |
DLINK_FOREACH_SAFE(ptr, next_ptr, mod_paths.head) |
| 192 |
{ |
| 193 |
pathst = ptr->data; |
| 194 |
|
| 195 |
dlinkDelete(&pathst->node, &mod_paths); |
| 196 |
MyFree(pathst); |
| 197 |
} |
| 198 |
|
| 199 |
DLINK_FOREACH_SAFE(ptr, next_ptr, conf_modules.head) |
| 200 |
{ |
| 201 |
pathst = ptr->data; |
| 202 |
|
| 203 |
dlinkDelete(&pathst->node, &conf_modules); |
| 204 |
MyFree(pathst); |
| 205 |
} |
| 206 |
} |
| 207 |
|
| 208 |
/* findmodule_byname |
| 209 |
* |
| 210 |
* input - name of module |
| 211 |
* output - NULL if not found or pointer to module |
| 212 |
* side effects - NONE |
| 213 |
*/ |
| 214 |
dlink_node * |
| 215 |
findmodule_byname(const char *name) |
| 216 |
{ |
| 217 |
dlink_node *ptr; |
| 218 |
struct module *modp; |
| 219 |
|
| 220 |
DLINK_FOREACH(ptr, mod_list.head) |
| 221 |
{ |
| 222 |
modp = ptr->data; |
| 223 |
|
| 224 |
if (strcmp(modp->name, name) == 0) |
| 225 |
return ptr; |
| 226 |
} |
| 227 |
|
| 228 |
return NULL; |
| 229 |
} |
| 230 |
|
| 231 |
/* load_all_modules() |
| 232 |
* |
| 233 |
* input - int flag warn |
| 234 |
* output - NONE |
| 235 |
* side effects - load all modules found in autoload directory |
| 236 |
*/ |
| 237 |
void |
| 238 |
load_all_modules(int warn) |
| 239 |
{ |
| 240 |
DIR *system_module_dir = NULL; |
| 241 |
struct dirent *ldirent = NULL; |
| 242 |
char module_fq_name[PATH_MAX + 1]; |
| 243 |
|
| 244 |
modules_init(); |
| 245 |
|
| 246 |
if ((system_module_dir = opendir(AUTOMODPATH)) == NULL) |
| 247 |
{ |
| 248 |
ilog(L_WARN, "Could not load modules from %s: %s", |
| 249 |
AUTOMODPATH, strerror(errno)); |
| 250 |
return; |
| 251 |
} |
| 252 |
|
| 253 |
while ((ldirent = readdir(system_module_dir)) != NULL) |
| 254 |
{ |
| 255 |
if (modules_valid_suffix(ldirent->d_name)) |
| 256 |
{ |
| 257 |
snprintf(module_fq_name, sizeof(module_fq_name), "%s/%s", |
| 258 |
AUTOMODPATH, ldirent->d_name); |
| 259 |
load_a_module(module_fq_name, warn, 0); |
| 260 |
} |
| 261 |
} |
| 262 |
|
| 263 |
closedir(system_module_dir); |
| 264 |
} |
| 265 |
|
| 266 |
/* load_conf_modules() |
| 267 |
* |
| 268 |
* input - NONE |
| 269 |
* output - NONE |
| 270 |
* side effects - load modules given in ircd.conf |
| 271 |
*/ |
| 272 |
void |
| 273 |
load_conf_modules(void) |
| 274 |
{ |
| 275 |
dlink_node *ptr = NULL; |
| 276 |
struct module_path *mpath = NULL; |
| 277 |
|
| 278 |
DLINK_FOREACH(ptr, conf_modules.head) |
| 279 |
{ |
| 280 |
mpath = ptr->data; |
| 281 |
|
| 282 |
if (findmodule_byname(mpath->path) == NULL) |
| 283 |
load_one_module(mpath->path, 0); |
| 284 |
} |
| 285 |
} |
| 286 |
|
| 287 |
/* load_core_modules() |
| 288 |
* |
| 289 |
* input - int flag warn |
| 290 |
* output - NONE |
| 291 |
* side effects - core modules are loaded, if any fail, kill ircd |
| 292 |
*/ |
| 293 |
void |
| 294 |
load_core_modules(int warn) |
| 295 |
{ |
| 296 |
char module_name[PATH_MAX + 1]; |
| 297 |
int i = 0; |
| 298 |
|
| 299 |
for (; core_module_table[i]; ++i) |
| 300 |
{ |
| 301 |
snprintf(module_name, sizeof(module_name), "%s%s", |
| 302 |
MODPATH, core_module_table[i]); |
| 303 |
|
| 304 |
if (load_a_module(module_name, warn, 1) == -1) |
| 305 |
{ |
| 306 |
ilog(L_CRIT, "Error loading core module %s: terminating ircd", |
| 307 |
core_module_table[i]); |
| 308 |
exit(EXIT_FAILURE); |
| 309 |
} |
| 310 |
} |
| 311 |
} |
| 312 |
|
| 313 |
/* load_one_module() |
| 314 |
* |
| 315 |
* input - pointer to path |
| 316 |
* - flagged as core module or not |
| 317 |
* output - -1 if error |
| 318 |
* side effects - module is loaded if found. |
| 319 |
*/ |
| 320 |
int |
| 321 |
load_one_module(const char *path, int coremodule) |
| 322 |
{ |
| 323 |
dlink_node *ptr = NULL; |
| 324 |
char modpath[PATH_MAX + 1]; |
| 325 |
struct stat statbuf; |
| 326 |
|
| 327 |
DLINK_FOREACH(ptr, mod_paths.head) |
| 328 |
{ |
| 329 |
const struct module_path *mpath = ptr->data; |
| 330 |
|
| 331 |
snprintf(modpath, sizeof(modpath), "%s/%s", mpath->path, path); |
| 332 |
|
| 333 |
if (!modules_valid_suffix(path)) |
| 334 |
continue; |
| 335 |
|
| 336 |
if (strstr(modpath, "../") == NULL && |
| 337 |
strstr(modpath, "/..") == NULL) |
| 338 |
{ |
| 339 |
if (!stat(modpath, &statbuf)) |
| 340 |
{ |
| 341 |
if (S_ISREG(statbuf.st_mode)) |
| 342 |
{ |
| 343 |
/* Regular files only please */ |
| 344 |
return load_a_module(modpath, 1, coremodule); |
| 345 |
} |
| 346 |
} |
| 347 |
} |
| 348 |
} |
| 349 |
|
| 350 |
sendto_realops_flags(UMODE_ALL, L_ALL, |
| 351 |
"Cannot locate module %s", path); |
| 352 |
ilog(L_WARN, "Cannot locate module %s", path); |
| 353 |
return -1; |
| 354 |
} |
| 355 |
|
| 356 |
/* load a module .. */ |
| 357 |
static void |
| 358 |
mo_modload(struct Client *client_p, struct Client *source_p, |
| 359 |
int parc, char *parv[]) |
| 360 |
{ |
| 361 |
const char *m_bn = NULL; |
| 362 |
|
| 363 |
if (!IsAdmin(source_p)) |
| 364 |
{ |
| 365 |
sendto_one(source_p, form_str(ERR_NOPRIVILEGES), |
| 366 |
me.name, source_p->name); |
| 367 |
return; |
| 368 |
} |
| 369 |
|
| 370 |
m_bn = libio_basename(parv[1]); |
| 371 |
|
| 372 |
if (findmodule_byname(m_bn) != NULL) |
| 373 |
{ |
| 374 |
sendto_one(source_p, ":%s NOTICE %s :Module %s is already loaded", |
| 375 |
me.name, source_p->name, m_bn); |
| 376 |
return; |
| 377 |
} |
| 378 |
|
| 379 |
load_one_module(parv[1], 0); |
| 380 |
} |
| 381 |
|
| 382 |
/* unload a module .. */ |
| 383 |
static void |
| 384 |
mo_modunload(struct Client *client_p, struct Client *source_p, |
| 385 |
int parc, char *parv[]) |
| 386 |
{ |
| 387 |
const char *m_bn = NULL; |
| 388 |
dlink_node *ptr; |
| 389 |
struct module *modp; |
| 390 |
|
| 391 |
if (!IsAdmin(source_p)) |
| 392 |
{ |
| 393 |
sendto_one(source_p, form_str(ERR_NOPRIVILEGES), |
| 394 |
me.name, source_p->name); |
| 395 |
return; |
| 396 |
} |
| 397 |
|
| 398 |
m_bn = libio_basename(parv[1]); |
| 399 |
|
| 400 |
if ((ptr = findmodule_byname(m_bn)) == NULL) |
| 401 |
{ |
| 402 |
sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded", |
| 403 |
me.name, source_p->name, m_bn); |
| 404 |
return; |
| 405 |
} |
| 406 |
|
| 407 |
modp = ptr->data; |
| 408 |
|
| 409 |
if (modp->core == 1) |
| 410 |
{ |
| 411 |
sendto_one(source_p, |
| 412 |
":%s NOTICE %s :Module %s is a core module and may not be unloaded", |
| 413 |
me.name, source_p->name, m_bn); |
| 414 |
return; |
| 415 |
} |
| 416 |
|
| 417 |
/* XXX might want to simply un dlink it here */ |
| 418 |
|
| 419 |
if (unload_one_module(m_bn, 1) == -1) |
| 420 |
{ |
| 421 |
sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded", |
| 422 |
me.name, source_p->name, m_bn); |
| 423 |
} |
| 424 |
} |
| 425 |
|
| 426 |
/* unload and load in one! */ |
| 427 |
static void |
| 428 |
mo_modreload(struct Client *client_p, struct Client *source_p, |
| 429 |
int parc, char *parv[]) |
| 430 |
{ |
| 431 |
const char *m_bn = NULL; |
| 432 |
dlink_node *ptr; |
| 433 |
struct module *modp; |
| 434 |
int check_core; |
| 435 |
|
| 436 |
if (!IsAdmin(source_p)) |
| 437 |
{ |
| 438 |
sendto_one(source_p, form_str(ERR_NOPRIVILEGES), |
| 439 |
me.name, source_p->name); |
| 440 |
return; |
| 441 |
} |
| 442 |
|
| 443 |
m_bn = libio_basename(parv[1]); |
| 444 |
|
| 445 |
if ((ptr = findmodule_byname(m_bn)) == NULL) |
| 446 |
{ |
| 447 |
sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded", |
| 448 |
me.name, source_p->name, m_bn); |
| 449 |
return; |
| 450 |
} |
| 451 |
|
| 452 |
modp = ptr->data; |
| 453 |
check_core = modp->core; |
| 454 |
|
| 455 |
if (unload_one_module(m_bn, 1) == -1) |
| 456 |
{ |
| 457 |
sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded", |
| 458 |
me.name, source_p->name, m_bn); |
| 459 |
return; |
| 460 |
} |
| 461 |
|
| 462 |
if ((load_one_module(parv[1], check_core) == -1) && check_core) |
| 463 |
{ |
| 464 |
sendto_realops_flags(UMODE_ALL, L_ALL, "Error reloading core " |
| 465 |
"module: %s: terminating ircd", parv[1]); |
| 466 |
ilog(L_CRIT, "Error loading core module %s: terminating ircd", parv[1]); |
| 467 |
exit(0); |
| 468 |
} |
| 469 |
} |
| 470 |
|
| 471 |
/* list modules .. */ |
| 472 |
static void |
| 473 |
mo_modlist(struct Client *client_p, struct Client *source_p, |
| 474 |
int parc, char *parv[]) |
| 475 |
{ |
| 476 |
const dlink_node *ptr = NULL; |
| 477 |
|
| 478 |
if (!IsAdmin(source_p)) |
| 479 |
{ |
| 480 |
sendto_one(source_p, form_str(ERR_NOPRIVILEGES), |
| 481 |
me.name, source_p->name); |
| 482 |
return; |
| 483 |
} |
| 484 |
|
| 485 |
DLINK_FOREACH(ptr, mod_list.head) |
| 486 |
{ |
| 487 |
const struct module *modp = ptr->data; |
| 488 |
|
| 489 |
if (parc > 1 && !match(parv[1], modp->name)) |
| 490 |
continue; |
| 491 |
|
| 492 |
sendto_one(source_p, form_str(RPL_MODLIST), me.name, parv[0], |
| 493 |
modp->name, modp->handle, |
| 494 |
modp->version, modp->core?"(core)":""); |
| 495 |
} |
| 496 |
|
| 497 |
sendto_one(source_p, form_str(RPL_ENDOFMODLIST), |
| 498 |
me.name, source_p->name); |
| 499 |
} |
| 500 |
|
| 501 |
/* unload and reload all modules */ |
| 502 |
static void |
| 503 |
mo_modrestart(struct Client *client_p, struct Client *source_p, |
| 504 |
int parc, char *parv[]) |
| 505 |
{ |
| 506 |
unsigned int modnum = 0; |
| 507 |
dlink_node *ptr = NULL, *ptr_next = NULL; |
| 508 |
|
| 509 |
if (!IsAdmin(source_p)) |
| 510 |
{ |
| 511 |
sendto_one(source_p, form_str(ERR_NOPRIVILEGES), |
| 512 |
me.name, source_p->name); |
| 513 |
return; |
| 514 |
} |
| 515 |
|
| 516 |
sendto_one(source_p, ":%s NOTICE %s :Reloading all modules", |
| 517 |
me.name, source_p->name); |
| 518 |
|
| 519 |
modnum = dlink_list_length(&mod_list); |
| 520 |
|
| 521 |
DLINK_FOREACH_SAFE(ptr, ptr_next, mod_list.head) |
| 522 |
{ |
| 523 |
struct module *modp = ptr->data; |
| 524 |
unload_one_module(modp->name, 0); |
| 525 |
} |
| 526 |
|
| 527 |
load_all_modules(0); |
| 528 |
load_conf_modules(); |
| 529 |
load_core_modules(0); |
| 530 |
|
| 531 |
sendto_realops_flags(UMODE_ALL, L_ALL, |
| 532 |
"Module Restart: %u modules unloaded, %lu modules loaded", |
| 533 |
modnum, dlink_list_length(&mod_list)); |
| 534 |
ilog(L_WARN, "Module Restart: %u modules unloaded, %lu modules loaded", |
| 535 |
modnum, dlink_list_length(&mod_list)); |
| 536 |
} |
