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/* |
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* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd). |
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* modules.c: A module loader. |
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* |
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* Copyright (C) 2002 by the past and present ircd coders, and others. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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* USA |
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* |
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* $Id$ |
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*/ |
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|
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#include "ltdl.h" |
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|
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#include "stdinc.h" |
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#include "list.h" |
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#include "modules.h" |
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#include "log.h" |
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#include "ircd.h" |
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#include "client.h" |
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#include "send.h" |
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#include "conf.h" |
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#include "numeric.h" |
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#include "parse.h" |
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#include "ircd_defs.h" |
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#include "irc_string.h" |
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#include "memory.h" |
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|
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|
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dlink_list modules_list = { NULL, NULL, 0 }; |
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|
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static const char *unknown_ver = "<unknown>"; |
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|
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static const char *core_module_table[] = |
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{ |
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"m_die.la", |
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"m_error.la", |
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"m_join.la", |
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"m_kick.la", |
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"m_kill.la", |
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"m_message.la", |
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"m_mode.la", |
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"m_nick.la", |
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"m_part.la", |
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"m_quit.la", |
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"m_server.la", |
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"m_sjoin.la", |
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"m_squit.la", |
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NULL |
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}; |
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|
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static dlink_list mod_paths = { NULL, NULL, 0 }; |
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static dlink_list conf_modules = { NULL, NULL, 0 }; |
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|
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int |
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modules_valid_suffix(const char *name) |
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{ |
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return ((name = strrchr(name, '.'))) && !strcmp(name, ".la"); |
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} |
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|
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/* unload_one_module() |
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* |
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* inputs - name of module to unload |
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* - 1 to say modules unloaded, 0 to not |
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* output - 0 if successful, -1 if error |
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* side effects - module is unloaded |
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*/ |
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int |
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unload_one_module(const char *name, int warn) |
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{ |
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struct module *modp = NULL; |
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|
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if ((modp = findmodule_byname(name)) == NULL) |
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return -1; |
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|
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if (modp->modexit) |
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modp->modexit(); |
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|
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assert(dlink_list_length(&modules_list) > 0); |
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dlinkDelete(&modp->node, &modules_list); |
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MyFree(modp->name); |
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|
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lt_dlclose(modp->handle); |
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|
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if (warn == 1) |
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{ |
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ilog(LOG_TYPE_IRCD, "Module %s unloaded", name); |
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sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s unloaded", name); |
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} |
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|
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return 0; |
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} |
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|
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/* load_a_module() |
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* |
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* inputs - path name of module, int to notice, int of core |
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* output - -1 if error 0 if success |
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* side effects - loads a module if successful |
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*/ |
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int |
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load_a_module(const char *path, int warn) |
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{ |
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lt_dlhandle tmpptr = NULL; |
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const char *mod_basename = NULL; |
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struct module *modp = NULL; |
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|
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if (findmodule_byname((mod_basename = libio_basename(path)))) |
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return 1; |
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|
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if (!(tmpptr = lt_dlopen(path))) { |
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const char *err = ((err = lt_dlerror())) ? err : "<unknown>"; |
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|
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sendto_realops_flags(UMODE_ALL, L_ALL, "Error loading module %s: %s", |
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mod_basename, err); |
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ilog(LOG_TYPE_IRCD, "Error loading module %s: %s", mod_basename, err); |
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return -1; |
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} |
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|
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if ((modp = lt_dlsym(tmpptr, "module_entry")) == NULL) |
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{ |
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sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no module_entry export", |
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mod_basename); |
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ilog(LOG_TYPE_IRCD, "Module %s has no module_entry export", mod_basename); |
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lt_dlclose(tmpptr); |
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return -1; |
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} |
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|
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modp->handle = tmpptr; |
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|
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if (EmptyString(modp->version)) |
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modp->version = unknown_ver; |
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|
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DupString(modp->name, mod_basename); |
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dlinkAdd(modp, &modp->node, &modules_list); |
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|
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if (modp->modinit) |
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modp->modinit(); |
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|
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if (warn == 1) |
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{ |
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sendto_realops_flags(UMODE_ALL, L_ALL, |
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"Module %s [version: %s handle: %p] loaded.", |
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modp->name, modp->version, tmpptr); |
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ilog(LOG_TYPE_IRCD, "Module %s [version: %s handle: %p] loaded.", |
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modp->name, modp->version, tmpptr); |
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} |
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|
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return 0; |
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} |
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|
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/* |
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* modules_init |
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* |
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* input - NONE |
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* output - NONE |
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* side effects - The basic module manipulation modules are loaded |
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*/ |
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void |
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modules_init(void) |
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{ |
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if (lt_dlinit()) |
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{ |
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ilog(LOG_TYPE_IRCD, "Couldn't initialize the libltdl run time dynamic" |
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" link library. Exiting."); |
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exit(0); |
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} |
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} |
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|
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/* mod_find_path() |
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* |
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* input - path |
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* output - none |
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* side effects - returns a module path from path |
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*/ |
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static struct module_path * |
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mod_find_path(const char *path) |
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{ |
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dlink_node *ptr; |
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|
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DLINK_FOREACH(ptr, mod_paths.head) |
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{ |
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struct module_path *mpath = ptr->data; |
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|
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if (!strcmp(path, mpath->path)) |
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return mpath; |
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} |
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|
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return NULL; |
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} |
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|
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/* mod_add_path() |
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* |
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* input - path |
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* output - NONE |
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* side effects - adds path to list |
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*/ |
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void |
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mod_add_path(const char *path) |
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{ |
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struct module_path *pathst; |
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|
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if (mod_find_path(path)) |
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return; |
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|
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pathst = MyMalloc(sizeof(struct module_path)); |
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|
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strlcpy(pathst->path, path, sizeof(pathst->path)); |
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dlinkAdd(pathst, &pathst->node, &mod_paths); |
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} |
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|
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/* add_conf_module |
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* |
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* input - module name |
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* output - NONE |
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* side effects - adds module to conf_mod |
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*/ |
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void |
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add_conf_module(const char *name) |
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{ |
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struct module_path *pathst; |
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|
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pathst = MyMalloc(sizeof(struct module_path)); |
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|
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strlcpy(pathst->path, name, sizeof(pathst->path)); |
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dlinkAdd(pathst, &pathst->node, &conf_modules); |
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} |
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|
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/* mod_clear_paths() |
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* |
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* input - NONE |
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* output - NONE |
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* side effects - clear the lists of paths and conf modules |
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*/ |
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void |
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mod_clear_paths(void) |
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{ |
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dlink_node *ptr = NULL, *next_ptr = NULL; |
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|
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DLINK_FOREACH_SAFE(ptr, next_ptr, mod_paths.head) |
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{ |
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dlinkDelete(ptr, &mod_paths); |
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MyFree(ptr->data); |
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} |
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|
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DLINK_FOREACH_SAFE(ptr, next_ptr, conf_modules.head) |
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{ |
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dlinkDelete(ptr, &conf_modules); |
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MyFree(ptr->data); |
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} |
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} |
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|
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/* findmodule_byname |
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* |
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* input - name of module |
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* output - NULL if not found or pointer to module |
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* side effects - NONE |
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*/ |
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struct module * |
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findmodule_byname(const char *name) |
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{ |
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dlink_node *ptr = NULL; |
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|
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DLINK_FOREACH(ptr, modules_list.head) |
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{ |
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struct module *modp = ptr->data; |
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|
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if (strcmp(modp->name, name) == 0) |
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return modp; |
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} |
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|
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return NULL; |
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} |
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|
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/* load_all_modules() |
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* |
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* input - int flag warn |
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* output - NONE |
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* side effects - load all modules found in autoload directory |
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*/ |
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void |
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load_all_modules(int warn) |
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{ |
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DIR *system_module_dir = NULL; |
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struct dirent *ldirent = NULL; |
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char module_fq_name[PATH_MAX + 1]; |
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|
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if ((system_module_dir = opendir(AUTOMODPATH)) == NULL) |
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{ |
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ilog(LOG_TYPE_IRCD, "Could not load modules from %s: %s", |
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AUTOMODPATH, strerror(errno)); |
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return; |
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} |
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|
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while ((ldirent = readdir(system_module_dir)) != NULL) |
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{ |
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if (modules_valid_suffix(ldirent->d_name)) |
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{ |
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snprintf(module_fq_name, sizeof(module_fq_name), "%s/%s", |
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AUTOMODPATH, ldirent->d_name); |
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load_a_module(module_fq_name, warn); |
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} |
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} |
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|
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closedir(system_module_dir); |
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} |
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|
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/* load_conf_modules() |
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* |
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* input - NONE |
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* output - NONE |
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* side effects - load modules given in ircd.conf |
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*/ |
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void |
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load_conf_modules(void) |
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{ |
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dlink_node *ptr = NULL; |
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|
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DLINK_FOREACH(ptr, conf_modules.head) |
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{ |
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struct module_path *mpath = ptr->data; |
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|
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if (findmodule_byname(mpath->path) == NULL) |
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load_one_module(mpath->path); |
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} |
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} |
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|
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/* load_core_modules() |
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* |
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* input - int flag warn |
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* output - NONE |
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* side effects - core modules are loaded, if any fail, kill ircd |
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*/ |
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void |
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load_core_modules(int warn) |
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{ |
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char module_name[PATH_MAX + 1]; |
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int i = 0; |
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|
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for (; core_module_table[i]; ++i) |
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{ |
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snprintf(module_name, sizeof(module_name), "%s%s", |
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MODPATH, core_module_table[i]); |
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|
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if (load_a_module(module_name, warn) == -1) |
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{ |
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ilog(LOG_TYPE_IRCD, "Error loading core module %s: terminating ircd", |
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core_module_table[i]); |
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exit(EXIT_FAILURE); |
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} |
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} |
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} |
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|
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/* load_one_module() |
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* |
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* input - pointer to path |
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* - flagged as core module or not |
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* output - -1 if error |
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* side effects - module is loaded if found. |
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*/ |
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int |
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load_one_module(const char *path) |
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{ |
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dlink_node *ptr = NULL; |
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char modpath[PATH_MAX + 1]; |
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struct stat statbuf; |
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|
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DLINK_FOREACH(ptr, mod_paths.head) |
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{ |
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const struct module_path *mpath = ptr->data; |
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|
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snprintf(modpath, sizeof(modpath), "%s/%s", mpath->path, path); |
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|
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if (!modules_valid_suffix(path)) |
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continue; |
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|
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if (strstr(modpath, "../") == NULL && |
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strstr(modpath, "/..") == NULL) |
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if (!stat(modpath, &statbuf)) |
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if (S_ISREG(statbuf.st_mode)) /* Regular files only please */ |
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return load_a_module(modpath, 1); |
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} |
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|
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sendto_realops_flags(UMODE_ALL, L_ALL, |
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"Cannot locate module %s", path); |
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ilog(LOG_TYPE_IRCD, "Cannot locate module %s", path); |
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return -1; |
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} |
