trunk/src/modules.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  modules.c: A module loader.
 *
 *  Copyright (C) 2002 by the past and present ircd coders, and others.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 *
 *  $Id$
 */

#include "ltdl.h"

#include "stdinc.h"
#include "list.h"
#include "modules.h"
#include "s_log.h"
#include "ircd.h"
#include "client.h"
#include "send.h"
#include "s_conf.h"
#include "numeric.h"
#include "parse.h"
#include "ircd_defs.h"
#include "irc_string.h"
#include "memory.h"


static dlink_list modules_list = { NULL, NULL, 0 };

static const char *unknown_ver = "<unknown>";

static const char *core_module_table[] =
{
  "m_die.la",
  "m_error.la",
  "m_join.la",
  "m_kick.la",
  "m_kill.la",
  "m_message.la",
  "m_mode.la",
  "m_nick.la",
  "m_part.la",
  "m_quit.la",
  "m_server.la",
  "m_sjoin.la",
  "m_squit.la",
  NULL
};

static dlink_list mod_paths = { NULL, NULL, 0 };
static dlink_list conf_modules = { NULL, NULL, 0 };

static void mo_modload(struct Client *, struct Client *, int, char *[]);
static void mo_modlist(struct Client *, struct Client *, int, char *[]);
static void mo_modreload(struct Client *, struct Client *, int, char *[]);
static void mo_modunload(struct Client *, struct Client *, int, char *[]);
static void mo_modrestart(struct Client *, struct Client *, int, char *[]);

struct Message modload_msgtab = {
 "MODLOAD", 0, 0, 2, 0, MFLG_SLOW, 0,
  {m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modload, m_ignore}
};

struct Message modunload_msgtab = {
 "MODUNLOAD", 0, 0, 2, 0, MFLG_SLOW, 0,
  {m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modunload, m_ignore}
};

struct Message modreload_msgtab = {
  "MODRELOAD", 0, 0, 2, 0, MFLG_SLOW, 0,
  {m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modreload, m_ignore}
};

struct Message modlist_msgtab = {
 "MODLIST", 0, 0, 0, 0, MFLG_SLOW, 0,
  {m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modlist, m_ignore}
};

struct Message modrestart_msgtab = {
 "MODRESTART", 0, 0, 0, 0, MFLG_SLOW, 0,
 {m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modrestart, m_ignore}
};


int
modules_valid_suffix(const char *name)
{
  return ((name = strrchr(name, '.'))) && !strcmp(name, ".la");
}

/* unload_one_module()
 *
 * inputs       - name of module to unload
 *              - 1 to say modules unloaded, 0 to not
 * output       - 0 if successful, -1 if error
 * side effects - module is unloaded
 */
int
unload_one_module(const char *name, int warn)
{
  struct module *modp = NULL;

  if ((modp = findmodule_byname(name)) == NULL)
    return -1;

  if (modp->modexit)
   modp->modexit();

  assert(dlink_list_length(&modules_list) > 0);
  dlinkDelete(&modp->node, &modules_list);
  MyFree(modp->name);

  lt_dlclose(modp->handle);

  if (warn == 1)
  {
    ilog(LOG_TYPE_IRCD, "Module %s unloaded", name);
    sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s unloaded", name);
  }

  return 0;
}

/* load_a_module()
 *
 * inputs       - path name of module, int to notice, int of core
 * output       - -1 if error 0 if success
 * side effects - loads a module if successful
 */
int
load_a_module(const char *path, int warn, int core)
{
  lt_dlhandle tmpptr = NULL;
  const char *mod_basename = NULL;
  struct module *modp = NULL;

  if (findmodule_byname((mod_basename = libio_basename(path))))
    return 1;

  if (!(tmpptr = lt_dlopen(path))) {
    const char *err = ((err = lt_dlerror())) ? err : "<unknown>";

    sendto_realops_flags(UMODE_ALL, L_ALL, "Error loading module %s: %s",
                         mod_basename, err);
    ilog(LOG_TYPE_IRCD, "Error loading module %s: %s", mod_basename, err);
    return -1;
  }

  if ((modp = lt_dlsym(tmpptr, "module_entry")) == NULL)
  {
    sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no module_entry export",
                         mod_basename);
    ilog(LOG_TYPE_IRCD, "Module %s has no module_entry export", mod_basename);
    lt_dlclose(tmpptr);
    return -1;
  }

  modp->handle = tmpptr;

  if (EmptyString(modp->version))
    modp->version = unknown_ver;

  if (core)
    modp->flags |= MODULE_FLAG_CORE;

  DupString(modp->name, mod_basename);
  dlinkAdd(modp, &modp->node, &modules_list);

  if (modp->modinit)
    modp->modinit();

  if (warn == 1)
  {
    sendto_realops_flags(UMODE_ALL, L_ALL,
                         "Module %s [version: %s handle: %p] loaded.",
                         modp->name, modp->version, tmpptr);
    ilog(LOG_TYPE_IRCD, "Module %s [version: %s handle: %p] loaded.",
         modp->name, modp->version, tmpptr);
  }

  return 0;
}

/*
 * modules_init
 *
 * input        - NONE
 * output       - NONE
 * side effects - The basic module manipulation modules are loaded
 */
void
modules_init(void)
{
  if (lt_dlinit())
  {
    ilog(LOG_TYPE_IRCD, "Couldn't initialize the libltdl run time dynamic"
         " link library. Exiting.");
    exit(0);
  }

  mod_add_cmd(&modload_msgtab);
  mod_add_cmd(&modunload_msgtab);
  mod_add_cmd(&modreload_msgtab);
  mod_add_cmd(&modlist_msgtab);
  mod_add_cmd(&modrestart_msgtab);
}

/* mod_find_path()
 *
 * input        - path
 * output       - none
 * side effects - returns a module path from path
 */
static struct module_path *
mod_find_path(const char *path)
{
  dlink_node *ptr;
  struct module_path *mpath;

  DLINK_FOREACH(ptr, mod_paths.head)
  {
    mpath = ptr->data;

    if (!strcmp(path, mpath->path))
      return mpath;
  }

  return NULL;
}

/* mod_add_path()
 *
 * input        - path
 * output       - NONE
 * side effects - adds path to list
 */
void
mod_add_path(const char *path)
{
  struct module_path *pathst;

  if (mod_find_path(path))
    return;

  pathst = MyMalloc(sizeof(struct module_path));

  strlcpy(pathst->path, path, sizeof(pathst->path));
  dlinkAdd(pathst, &pathst->node, &mod_paths);
}

/* add_conf_module
 *
 * input        - module name
 * output       - NONE
 * side effects - adds module to conf_mod
 */
void
add_conf_module(const char *name)
{
  struct module_path *pathst;

  pathst = MyMalloc(sizeof(struct module_path));

  strlcpy(pathst->path, name, sizeof(pathst->path));
  dlinkAdd(pathst, &pathst->node, &conf_modules);
}

/* mod_clear_paths()
 *
 * input        - NONE
 * output       - NONE
 * side effects - clear the lists of paths and conf modules
 */
void
mod_clear_paths(void)
{
  struct module_path *pathst = NULL;
  dlink_node *ptr = NULL, *next_ptr = NULL;

  DLINK_FOREACH_SAFE(ptr, next_ptr, mod_paths.head)
  {
    pathst = ptr->data;

    dlinkDelete(&pathst->node, &mod_paths);
    MyFree(pathst);
  }

  DLINK_FOREACH_SAFE(ptr, next_ptr, conf_modules.head)
  {
    pathst = ptr->data;

    dlinkDelete(&pathst->node, &conf_modules);
    MyFree(pathst);
  }
}

/* findmodule_byname
 *
 * input        - name of module
 * output       - NULL if not found or pointer to module
 * side effects - NONE
 */
struct module *
findmodule_byname(const char *name)
{
  dlink_node *ptr = NULL;

  DLINK_FOREACH(ptr, modules_list.head)
  {
    struct module *modp = ptr->data;

    if (strcmp(modp->name, name) == 0)
      return modp;
  }

  return NULL;
}

/* load_all_modules()
 *
 * input        - int flag warn
 * output       - NONE
 * side effects - load all modules found in autoload directory
 */
void
load_all_modules(int warn)
{
  DIR *system_module_dir = NULL;
  struct dirent *ldirent = NULL;
  char module_fq_name[PATH_MAX + 1];

  modules_init();

  if ((system_module_dir = opendir(AUTOMODPATH)) == NULL)
  {
    ilog(LOG_TYPE_IRCD, "Could not load modules from %s: %s",
         AUTOMODPATH, strerror(errno));
    return;
  }

  while ((ldirent = readdir(system_module_dir)) != NULL)
  {
    if (modules_valid_suffix(ldirent->d_name))
    {
       snprintf(module_fq_name, sizeof(module_fq_name), "%s/%s",
                AUTOMODPATH, ldirent->d_name);
       load_a_module(module_fq_name, warn, 0);
    }
  }

  closedir(system_module_dir);
}

/* load_conf_modules()
 *
 * input        - NONE
 * output       - NONE
 * side effects - load modules given in ircd.conf
 */
void
load_conf_modules(void)
{
  dlink_node *ptr = NULL;
  struct module_path *mpath = NULL;

  DLINK_FOREACH(ptr, conf_modules.head)
  {
    mpath = ptr->data;

    if (findmodule_byname(mpath->path) == NULL)
      load_one_module(mpath->path, 0);
  }
}

/* load_core_modules()
 *
 * input        - int flag warn
 * output       - NONE
 * side effects - core modules are loaded, if any fail, kill ircd
 */
void
load_core_modules(int warn)
{
  char module_name[PATH_MAX + 1];
  int i = 0;

  for (; core_module_table[i]; ++i)
  {
    snprintf(module_name, sizeof(module_name), "%s%s",
             MODPATH, core_module_table[i]);

    if (load_a_module(module_name, warn, 1) == -1)
    {
      ilog(LOG_TYPE_IRCD, "Error loading core module %s: terminating ircd",
           core_module_table[i]);
      exit(EXIT_FAILURE);
    }
  }
}

/* load_one_module()
 *
 * input        - pointer to path
 *              - flagged as core module or not
 * output       - -1 if error 
 * side effects - module is loaded if found.
 */
int
load_one_module(const char *path, int coremodule)
{
  dlink_node *ptr = NULL;
  char modpath[PATH_MAX + 1];
  struct stat statbuf;

  DLINK_FOREACH(ptr, mod_paths.head)
  {
    const struct module_path *mpath = ptr->data;

    snprintf(modpath, sizeof(modpath), "%s/%s", mpath->path, path);

    if (!modules_valid_suffix(path))
      continue;

    if (strstr(modpath, "../") == NULL &&
        strstr(modpath, "/..") == NULL) 
    {
      if (!stat(modpath, &statbuf))
      {
        if (S_ISREG(statbuf.st_mode))
        {
          /* Regular files only please */
          return load_a_module(modpath, 1, coremodule);
        }
      }
    }
  }

  sendto_realops_flags(UMODE_ALL, L_ALL,
                       "Cannot locate module %s", path);
  ilog(LOG_TYPE_IRCD, "Cannot locate module %s", path);
  return -1;
}

/* load a module .. */
static void
mo_modload(struct Client *client_p, struct Client *source_p,
           int parc, char *parv[])
{
  const char *m_bn = NULL;

  if (!HasOFlag(source_p, OPER_FLAG_MODULE))
  {
    sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
               me.name, source_p->name);
    return;
  }

  m_bn = libio_basename(parv[1]);

  if (findmodule_byname(m_bn) != NULL)
  {
    sendto_one(source_p, ":%s NOTICE %s :Module %s is already loaded",
               me.name, source_p->name, m_bn);
    return;
  }

  load_one_module(parv[1], 0);
}

/* unload a module .. */
static void
mo_modunload(struct Client *client_p, struct Client *source_p,
             int parc, char *parv[])
{
  const char *m_bn = NULL;
  struct module *modp = NULL;

  if (!HasOFlag(source_p, OPER_FLAG_MODULE))
  {
    sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
               me.name, source_p->name);
    return;
  }

  m_bn = libio_basename(parv[1]);

  if ((modp = findmodule_byname(m_bn)) == NULL)
  {
    sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
               me.name, source_p->name, m_bn);
    return;
  }

  if (modp->flags & MODULE_FLAG_CORE)
  {
    sendto_one(source_p,
               ":%s NOTICE %s :Module %s is a core module and may not be unloaded",
               me.name, source_p->name, m_bn);
    return;
  }

  if (unload_one_module(m_bn, 1) == -1)
  {
    sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
               me.name, source_p->name, m_bn);
  }
}

/* unload and load in one! */
static void
mo_modreload(struct Client *client_p, struct Client *source_p,
             int parc, char *parv[])
{
  const char *m_bn = NULL;
  struct module *modp = NULL;
  int check_core;

  if (!HasOFlag(source_p, OPER_FLAG_MODULE))
  {
    sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
               me.name, source_p->name);
    return;
  }

  m_bn = libio_basename(parv[1]);

  if ((modp = findmodule_byname(m_bn)) == NULL)
  {
    sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
               me.name, source_p->name, m_bn);
    return;
  }

  check_core = (modp->flags & MODULE_FLAG_CORE) != 0;

  if (unload_one_module(m_bn, 1) == -1)
  {
    sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
               me.name, source_p->name, m_bn);
    return;
  }

  if ((load_one_module(parv[1], check_core) == -1) && check_core)
  {
    sendto_realops_flags(UMODE_ALL, L_ALL, "Error reloading core "
                         "module: %s: terminating ircd", parv[1]);
    ilog(LOG_TYPE_IRCD, "Error loading core module %s: terminating ircd", parv[1]);
    exit(0);
  }
}

/* list modules .. */
static void
mo_modlist(struct Client *client_p, struct Client *source_p,
           int parc, char *parv[])
{
  const dlink_node *ptr = NULL;

  if (!HasOFlag(source_p, OPER_FLAG_MODULE))
  {
    sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
               me.name, source_p->name);
    return;
  }

  DLINK_FOREACH(ptr, modules_list.head)
  {
    const struct module *modp = ptr->data;

    if (parc > 1 && !match(parv[1], modp->name))
      continue;

    sendto_one(source_p, form_str(RPL_MODLIST), me.name, source_p->name,
               modp->name, modp->handle,
               modp->version, (modp->flags & MODULE_FLAG_CORE) ?"(core)":"");
  }

  sendto_one(source_p, form_str(RPL_ENDOFMODLIST),
             me.name, source_p->name);
}

/* unload and reload all modules */
static void
mo_modrestart(struct Client *client_p, struct Client *source_p,
              int parc, char *parv[])
{
  unsigned int modnum = 0;
  dlink_node *ptr = NULL, *ptr_next = NULL;

  if (!HasOFlag(source_p, OPER_FLAG_MODULE))
  {
    sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
               me.name, source_p->name);
    return;
  }

  sendto_one(source_p, ":%s NOTICE %s :Reloading all modules",
             me.name, source_p->name);

  modnum = dlink_list_length(&modules_list);

  DLINK_FOREACH_SAFE(ptr, ptr_next, modules_list.head)
  {
    struct module *modp = ptr->data;
    unload_one_module(modp->name, 0);
  }

  load_all_modules(0);
  load_conf_modules();
  load_core_modules(0);

  sendto_realops_flags(UMODE_ALL, L_ALL,
                      "Module Restart: %u modules unloaded, %u modules loaded",
                        modnum, dlink_list_length(&modules_list));
  ilog(LOG_TYPE_IRCD, "Module Restart: %u modules unloaded, %u modules loaded",
       modnum, dlink_list_length(&modules_list));
}
Revision:	1247
Committed:	Sat Oct 1 07:54:24 2011 UTC (13 years, 11 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-8/src/modules.c*
File size:	14944 byte(s)
Log Message:	- Rewrite and cleanup half-broken logging subsystem. Logfile rotating is not working yet
#	User	Rev	Content
1	adx	30	/*
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	knight	31	* $Id$
23	adx	30	*/
24
25	michael	1237	#include "ltdl.h"
26
27	adx	30	#include "stdinc.h"
28	michael	1011	#include "list.h"
29	adx	30	#include "modules.h"
30			#include "s_log.h"
31			#include "ircd.h"
32			#include "client.h"
33			#include "send.h"
34			#include "s_conf.h"
35			#include "numeric.h"
36			#include "parse.h"
37			#include "ircd_defs.h"
38			#include "irc_string.h"
39			#include "memory.h"
40
41
42	michael	1238	static dlink_list modules_list = { NULL, NULL, 0 };
43	adx	30
44	michael	1237	static const char *unknown_ver = "<unknown>";
45
46	adx	30	static const char *core_module_table[] =
47			{
48	michael	912	"m_die.la",
49	michael	946	"m_error.la",
50	michael	912	"m_join.la",
51			"m_kick.la",
52			"m_kill.la",
53			"m_message.la",
54			"m_mode.la",
55			"m_nick.la",
56			"m_part.la",
57			"m_quit.la",
58			"m_server.la",
59			"m_sjoin.la",
60			"m_squit.la",
61	adx	30	NULL
62			};
63
64			static dlink_list mod_paths = { NULL, NULL, 0 };
65			static dlink_list conf_modules = { NULL, NULL, 0 };
66
67			static void mo_modload(struct Client , struct Client , int, char *[]);
68			static void mo_modlist(struct Client , struct Client , int, char *[]);
69			static void mo_modreload(struct Client , struct Client , int, char *[]);
70			static void mo_modunload(struct Client , struct Client , int, char *[]);
71			static void mo_modrestart(struct Client , struct Client , int, char *[]);
72
73			struct Message modload_msgtab = {
74			"MODLOAD", 0, 0, 2, 0, MFLG_SLOW, 0,
75			{m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modload, m_ignore}
76			};
77
78			struct Message modunload_msgtab = {
79			"MODUNLOAD", 0, 0, 2, 0, MFLG_SLOW, 0,
80			{m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modunload, m_ignore}
81			};
82
83			struct Message modreload_msgtab = {
84			"MODRELOAD", 0, 0, 2, 0, MFLG_SLOW, 0,
85			{m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modreload, m_ignore}
86			};
87
88			struct Message modlist_msgtab = {
89			"MODLIST", 0, 0, 0, 0, MFLG_SLOW, 0,
90			{m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modlist, m_ignore}
91			};
92
93			struct Message modrestart_msgtab = {
94			"MODRESTART", 0, 0, 0, 0, MFLG_SLOW, 0,
95			{m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modrestart, m_ignore}
96			};
97
98
99	michael	1237	int
100			modules_valid_suffix(const char *name)
101			{
102			return ((name = strrchr(name, '.'))) && !strcmp(name, ".la");
103			}
104
105			/* unload_one_module()
106			*
107			* inputs - name of module to unload
108			* - 1 to say modules unloaded, 0 to not
109			* output - 0 if successful, -1 if error
110			* side effects - module is unloaded
111			*/
112			int
113			unload_one_module(const char *name, int warn)
114			{
115			struct module *modp = NULL;
116
117			if ((modp = findmodule_byname(name)) == NULL)
118			return -1;
119
120			if (modp->modexit)
121			modp->modexit();
122
123	michael	1238	assert(dlink_list_length(&modules_list) > 0);
124			dlinkDelete(&modp->node, &modules_list);
125	michael	1237	MyFree(modp->name);
126
127			lt_dlclose(modp->handle);
128
129			if (warn == 1)
130			{
131	michael	1247	ilog(LOG_TYPE_IRCD, "Module %s unloaded", name);
132	michael	1237	sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s unloaded", name);
133			}
134
135			return 0;
136			}
137
138			/* load_a_module()
139			*
140			* inputs - path name of module, int to notice, int of core
141			* output - -1 if error 0 if success
142			* side effects - loads a module if successful
143			*/
144			int
145			load_a_module(const char *path, int warn, int core)
146			{
147			lt_dlhandle tmpptr = NULL;
148			const char *mod_basename = NULL;
149			struct module *modp = NULL;
150
151			if (findmodule_byname((mod_basename = libio_basename(path))))
152			return 1;
153
154			if (!(tmpptr = lt_dlopen(path))) {
155			const char *err = ((err = lt_dlerror())) ? err : "<unknown>";
156
157			sendto_realops_flags(UMODE_ALL, L_ALL, "Error loading module %s: %s",
158			mod_basename, err);
159	michael	1247	ilog(LOG_TYPE_IRCD, "Error loading module %s: %s", mod_basename, err);
160	michael	1237	return -1;
161			}
162
163			if ((modp = lt_dlsym(tmpptr, "module_entry")) == NULL)
164			{
165			sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no module_entry export",
166			mod_basename);
167	michael	1247	ilog(LOG_TYPE_IRCD, "Module %s has no module_entry export", mod_basename);
168	michael	1237	lt_dlclose(tmpptr);
169			return -1;
170			}
171
172			modp->handle = tmpptr;
173
174			if (EmptyString(modp->version))
175			modp->version = unknown_ver;
176
177			if (core)
178			modp->flags \|= MODULE_FLAG_CORE;
179
180			DupString(modp->name, mod_basename);
181	michael	1238	dlinkAdd(modp, &modp->node, &modules_list);
182	michael	1237
183			if (modp->modinit)
184			modp->modinit();
185
186			if (warn == 1)
187			{
188			sendto_realops_flags(UMODE_ALL, L_ALL,
189			"Module %s [version: %s handle: %p] loaded.",
190			modp->name, modp->version, tmpptr);
191	michael	1247	ilog(LOG_TYPE_IRCD, "Module %s [version: %s handle: %p] loaded.",
192	michael	1237	modp->name, modp->version, tmpptr);
193			}
194
195			return 0;
196			}
197
198	adx	30	/*
199			* modules_init
200			*
201			* input - NONE
202			* output - NONE
203			* side effects - The basic module manipulation modules are loaded
204			*/
205			void
206			modules_init(void)
207			{
208	michael	1237	if (lt_dlinit())
209			{
210	michael	1247	ilog(LOG_TYPE_IRCD, "Couldn't initialize the libltdl run time dynamic"
211	michael	1237	" link library. Exiting.");
212			exit(0);
213			}
214	michael	912
215	adx	30	mod_add_cmd(&modload_msgtab);
216			mod_add_cmd(&modunload_msgtab);
217			mod_add_cmd(&modreload_msgtab);
218			mod_add_cmd(&modlist_msgtab);
219			mod_add_cmd(&modrestart_msgtab);
220			}
221
222			/* mod_find_path()
223			*
224			* input - path
225			* output - none
226			* side effects - returns a module path from path
227			*/
228			static struct module_path *
229			mod_find_path(const char *path)
230			{
231			dlink_node *ptr;
232			struct module_path *mpath;
233
234			DLINK_FOREACH(ptr, mod_paths.head)
235			{
236			mpath = ptr->data;
237
238			if (!strcmp(path, mpath->path))
239			return mpath;
240			}
241
242			return NULL;
243			}
244
245			/* mod_add_path()
246			*
247			* input - path
248			* output - NONE
249			* side effects - adds path to list
250			*/
251			void
252			mod_add_path(const char *path)
253			{
254			struct module_path *pathst;
255
256			if (mod_find_path(path))
257			return;
258
259			pathst = MyMalloc(sizeof(struct module_path));
260
261			strlcpy(pathst->path, path, sizeof(pathst->path));
262			dlinkAdd(pathst, &pathst->node, &mod_paths);
263			}
264
265			/* add_conf_module
266			*
267			* input - module name
268			* output - NONE
269			* side effects - adds module to conf_mod
270			*/
271			void
272			add_conf_module(const char *name)
273			{
274			struct module_path *pathst;
275
276			pathst = MyMalloc(sizeof(struct module_path));
277
278			strlcpy(pathst->path, name, sizeof(pathst->path));
279			dlinkAdd(pathst, &pathst->node, &conf_modules);
280			}
281
282			/* mod_clear_paths()
283			*
284			* input - NONE
285			* output - NONE
286			* side effects - clear the lists of paths and conf modules
287			*/
288			void
289			mod_clear_paths(void)
290			{
291	michael	1237	struct module_path *pathst = NULL;
292			dlink_node ptr = NULL, next_ptr = NULL;
293	adx	30
294			DLINK_FOREACH_SAFE(ptr, next_ptr, mod_paths.head)
295			{
296			pathst = ptr->data;
297
298			dlinkDelete(&pathst->node, &mod_paths);
299			MyFree(pathst);
300			}
301
302			DLINK_FOREACH_SAFE(ptr, next_ptr, conf_modules.head)
303			{
304			pathst = ptr->data;
305
306			dlinkDelete(&pathst->node, &conf_modules);
307			MyFree(pathst);
308			}
309			}
310
311			/* findmodule_byname
312			*
313			* input - name of module
314			* output - NULL if not found or pointer to module
315			* side effects - NONE
316			*/
317	michael	1230	struct module *
318	adx	30	findmodule_byname(const char *name)
319			{
320	michael	1230	dlink_node *ptr = NULL;
321	adx	30
322	michael	1238	DLINK_FOREACH(ptr, modules_list.head)
323	adx	30	{
324	michael	1230	struct module *modp = ptr->data;
325	adx	30
326	db	218	if (strcmp(modp->name, name) == 0)
327	michael	1230	return modp;
328	adx	30	}
329
330			return NULL;
331			}
332
333			/* load_all_modules()
334			*
335			* input - int flag warn
336			* output - NONE
337			* side effects - load all modules found in autoload directory
338			*/
339			void
340			load_all_modules(int warn)
341			{
342			DIR *system_module_dir = NULL;
343			struct dirent *ldirent = NULL;
344			char module_fq_name[PATH_MAX + 1];
345
346			modules_init();
347
348			if ((system_module_dir = opendir(AUTOMODPATH)) == NULL)
349			{
350	michael	1247	ilog(LOG_TYPE_IRCD, "Could not load modules from %s: %s",
351	adx	30	AUTOMODPATH, strerror(errno));
352			return;
353			}
354
355			while ((ldirent = readdir(system_module_dir)) != NULL)
356			{
357	michael	912	if (modules_valid_suffix(ldirent->d_name))
358	adx	30	{
359			snprintf(module_fq_name, sizeof(module_fq_name), "%s/%s",
360			AUTOMODPATH, ldirent->d_name);
361			load_a_module(module_fq_name, warn, 0);
362			}
363			}
364
365			closedir(system_module_dir);
366			}
367
368			/* load_conf_modules()
369			*
370			* input - NONE
371			* output - NONE
372			* side effects - load modules given in ircd.conf
373			*/
374			void
375			load_conf_modules(void)
376			{
377			dlink_node *ptr = NULL;
378			struct module_path *mpath = NULL;
379
380			DLINK_FOREACH(ptr, conf_modules.head)
381			{
382			mpath = ptr->data;
383
384			if (findmodule_byname(mpath->path) == NULL)
385			load_one_module(mpath->path, 0);
386			}
387			}
388
389			/* load_core_modules()
390			*
391			* input - int flag warn
392			* output - NONE
393			* side effects - core modules are loaded, if any fail, kill ircd
394			*/
395			void
396			load_core_modules(int warn)
397			{
398			char module_name[PATH_MAX + 1];
399			int i = 0;
400
401			for (; core_module_table[i]; ++i)
402			{
403	michael	912	snprintf(module_name, sizeof(module_name), "%s%s",
404			MODPATH, core_module_table[i]);
405	adx	30
406			if (load_a_module(module_name, warn, 1) == -1)
407			{
408	michael	1247	ilog(LOG_TYPE_IRCD, "Error loading core module %s: terminating ircd",
409	michael	912	core_module_table[i]);
410	adx	30	exit(EXIT_FAILURE);
411			}
412			}
413			}
414
415			/* load_one_module()
416			*
417			* input - pointer to path
418			* - flagged as core module or not
419			* output - -1 if error
420			* side effects - module is loaded if found.
421			*/
422			int
423	michael	978	load_one_module(const char *path, int coremodule)
424	adx	30	{
425			dlink_node *ptr = NULL;
426			char modpath[PATH_MAX + 1];
427			struct stat statbuf;
428
429			DLINK_FOREACH(ptr, mod_paths.head)
430			{
431			const struct module_path *mpath = ptr->data;
432
433			snprintf(modpath, sizeof(modpath), "%s/%s", mpath->path, path);
434
435	michael	912	if (!modules_valid_suffix(path))
436			continue;
437
438	adx	30	if (strstr(modpath, "../") == NULL &&
439			strstr(modpath, "/..") == NULL)
440			{
441			if (!stat(modpath, &statbuf))
442			{
443			if (S_ISREG(statbuf.st_mode))
444			{
445			/* Regular files only please */
446			return load_a_module(modpath, 1, coremodule);
447			}
448			}
449			}
450			}
451
452			sendto_realops_flags(UMODE_ALL, L_ALL,
453			"Cannot locate module %s", path);
454	michael	1247	ilog(LOG_TYPE_IRCD, "Cannot locate module %s", path);
455	adx	30	return -1;
456			}
457
458			/* load a module .. */
459			static void
460			mo_modload(struct Client client_p, struct Client source_p,
461			int parc, char *parv[])
462			{
463	michael	978	const char *m_bn = NULL;
464	adx	30
465	michael	1228	if (!HasOFlag(source_p, OPER_FLAG_MODULE))
466	adx	30	{
467			sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
468			me.name, source_p->name);
469			return;
470			}
471
472	michael	978	m_bn = libio_basename(parv[1]);
473	adx	30
474			if (findmodule_byname(m_bn) != NULL)
475			{
476			sendto_one(source_p, ":%s NOTICE %s :Module %s is already loaded",
477			me.name, source_p->name, m_bn);
478			return;
479			}
480
481			load_one_module(parv[1], 0);
482			}
483
484			/* unload a module .. */
485			static void
486			mo_modunload(struct Client client_p, struct Client source_p,
487			int parc, char *parv[])
488			{
489	michael	978	const char *m_bn = NULL;
490	michael	1230	struct module *modp = NULL;
491	adx	30
492	michael	1228	if (!HasOFlag(source_p, OPER_FLAG_MODULE))
493	adx	30	{
494			sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
495			me.name, source_p->name);
496			return;
497			}
498
499	michael	978	m_bn = libio_basename(parv[1]);
500	adx	30
501	michael	1230	if ((modp = findmodule_byname(m_bn)) == NULL)
502	adx	30	{
503			sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
504			me.name, source_p->name, m_bn);
505			return;
506			}
507
508	michael	1230	if (modp->flags & MODULE_FLAG_CORE)
509	adx	30	{
510			sendto_one(source_p,
511			":%s NOTICE %s :Module %s is a core module and may not be unloaded",
512			me.name, source_p->name, m_bn);
513			return;
514			}
515
516			if (unload_one_module(m_bn, 1) == -1)
517			{
518			sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
519			me.name, source_p->name, m_bn);
520			}
521			}
522
523			/* unload and load in one! */
524			static void
525			mo_modreload(struct Client client_p, struct Client source_p,
526			int parc, char *parv[])
527			{
528	michael	978	const char *m_bn = NULL;
529	michael	1230	struct module *modp = NULL;
530	adx	30	int check_core;
531
532	michael	1228	if (!HasOFlag(source_p, OPER_FLAG_MODULE))
533	adx	30	{
534			sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
535			me.name, source_p->name);
536			return;
537			}
538
539	michael	978	m_bn = libio_basename(parv[1]);
540	adx	30
541	michael	1230	if ((modp = findmodule_byname(m_bn)) == NULL)
542	adx	30	{
543			sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
544			me.name, source_p->name, m_bn);
545			return;
546			}
547
548	michael	1230	check_core = (modp->flags & MODULE_FLAG_CORE) != 0;
549	adx	30
550			if (unload_one_module(m_bn, 1) == -1)
551			{
552			sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
553			me.name, source_p->name, m_bn);
554			return;
555			}
556
557			if ((load_one_module(parv[1], check_core) == -1) && check_core)
558			{
559			sendto_realops_flags(UMODE_ALL, L_ALL, "Error reloading core "
560			"module: %s: terminating ircd", parv[1]);
561	michael	1247	ilog(LOG_TYPE_IRCD, "Error loading core module %s: terminating ircd", parv[1]);
562	adx	30	exit(0);
563			}
564			}
565
566			/* list modules .. */
567			static void
568			mo_modlist(struct Client client_p, struct Client source_p,
569			int parc, char *parv[])
570			{
571	michael	912	const dlink_node *ptr = NULL;
572	adx	30
573	michael	1228	if (!HasOFlag(source_p, OPER_FLAG_MODULE))
574	adx	30	{
575			sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
576			me.name, source_p->name);
577			return;
578			}
579
580	michael	1238	DLINK_FOREACH(ptr, modules_list.head)
581	adx	30	{
582	michael	912	const struct module *modp = ptr->data;
583	adx	30
584	michael	912	if (parc > 1 && !match(parv[1], modp->name))
585			continue;
586
587	michael	1234	sendto_one(source_p, form_str(RPL_MODLIST), me.name, source_p->name,
588	michael	912	modp->name, modp->handle,
589	michael	1230	modp->version, (modp->flags & MODULE_FLAG_CORE) ?"(core)":"");
590	adx	30	}
591
592			sendto_one(source_p, form_str(RPL_ENDOFMODLIST),
593			me.name, source_p->name);
594			}
595
596			/* unload and reload all modules */
597			static void
598			mo_modrestart(struct Client client_p, struct Client source_p,
599			int parc, char *parv[])
600			{
601			unsigned int modnum = 0;
602	michael	912	dlink_node ptr = NULL, ptr_next = NULL;
603
604	michael	1228	if (!HasOFlag(source_p, OPER_FLAG_MODULE))
605	adx	30	{
606			sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
607			me.name, source_p->name);
608			return;
609			}
610
611			sendto_one(source_p, ":%s NOTICE %s :Reloading all modules",
612			me.name, source_p->name);
613
614	michael	1238	modnum = dlink_list_length(&modules_list);
615	adx	30
616	michael	1238	DLINK_FOREACH_SAFE(ptr, ptr_next, modules_list.head)
617	adx	30	{
618	michael	912	struct module *modp = ptr->data;
619	adx	30	unload_one_module(modp->name, 0);
620			}
621
622			load_all_modules(0);
623			load_conf_modules();
624			load_core_modules(0);
625
626			sendto_realops_flags(UMODE_ALL, L_ALL,
627	michael	1247	"Module Restart: %u modules unloaded, %u modules loaded",
628	michael	1238	modnum, dlink_list_length(&modules_list));
629	michael	1247	ilog(LOG_TYPE_IRCD, "Module Restart: %u modules unloaded, %u modules loaded",
630	michael	1238	modnum, dlink_list_length(&modules_list));
631	adx	30	}