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 "handlers.h"
#include "numeric.h"
#include "parse.h"
#include "ircd_defs.h"
#include "irc_string.h"
#include "memory.h"


dlink_list mod_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(&mod_list) > 0);
  dlinkDelete(&modp->node, &mod_list);
  MyFree(modp->name);

  lt_dlclose(modp->handle);

  if (warn == 1)
  {
    ilog(L_INFO, "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(L_WARN, "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(L_WARN, "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, &mod_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(L_WARN, "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(L_ERROR, "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, mod_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(L_WARN, "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(L_CRIT, "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(L_WARN, "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(L_CRIT, "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, mod_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(&mod_list);

  DLINK_FOREACH_SAFE(ptr, ptr_next, mod_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(&mod_list));
  ilog(L_WARN, "Module Restart: %u modules unloaded, %u modules loaded",
       modnum, dlink_list_length(&mod_list));
}
Revision:	1237
Committed:	Thu Sep 29 11:32:21 2011 UTC (13 years, 11 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-8/src/modules.c*
File size:	14843 byte(s)
Log Message:	- move remaining functions in dynlink.c into modules.c
#	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 "handlers.h"
36			#include "numeric.h"
37			#include "parse.h"
38			#include "ircd_defs.h"
39			#include "irc_string.h"
40			#include "memory.h"
41
42
43			dlink_list mod_list = { NULL, NULL, 0 };
44
45	michael	1237
46			static const char *unknown_ver = "<unknown>";
47
48	adx	30	static const char *core_module_table[] =
49			{
50	michael	912	"m_die.la",
51	michael	946	"m_error.la",
52	michael	912	"m_join.la",
53			"m_kick.la",
54			"m_kill.la",
55			"m_message.la",
56			"m_mode.la",
57			"m_nick.la",
58			"m_part.la",
59			"m_quit.la",
60			"m_server.la",
61			"m_sjoin.la",
62			"m_squit.la",
63	adx	30	NULL
64			};
65
66			static dlink_list mod_paths = { NULL, NULL, 0 };
67			static dlink_list conf_modules = { NULL, NULL, 0 };
68
69			static void mo_modload(struct Client , struct Client , int, char *[]);
70			static void mo_modlist(struct Client , struct Client , int, char *[]);
71			static void mo_modreload(struct Client , struct Client , int, char *[]);
72			static void mo_modunload(struct Client , struct Client , int, char *[]);
73			static void mo_modrestart(struct Client , struct Client , int, char *[]);
74
75			struct Message modload_msgtab = {
76			"MODLOAD", 0, 0, 2, 0, MFLG_SLOW, 0,
77			{m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modload, m_ignore}
78			};
79
80			struct Message modunload_msgtab = {
81			"MODUNLOAD", 0, 0, 2, 0, MFLG_SLOW, 0,
82			{m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modunload, m_ignore}
83			};
84
85			struct Message modreload_msgtab = {
86			"MODRELOAD", 0, 0, 2, 0, MFLG_SLOW, 0,
87			{m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modreload, m_ignore}
88			};
89
90			struct Message modlist_msgtab = {
91			"MODLIST", 0, 0, 0, 0, MFLG_SLOW, 0,
92			{m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modlist, m_ignore}
93			};
94
95			struct Message modrestart_msgtab = {
96			"MODRESTART", 0, 0, 0, 0, MFLG_SLOW, 0,
97			{m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modrestart, m_ignore}
98			};
99
100
101	michael	1237	int
102			modules_valid_suffix(const char *name)
103			{
104			return ((name = strrchr(name, '.'))) && !strcmp(name, ".la");
105			}
106
107			/* unload_one_module()
108			*
109			* inputs - name of module to unload
110			* - 1 to say modules unloaded, 0 to not
111			* output - 0 if successful, -1 if error
112			* side effects - module is unloaded
113			*/
114			int
115			unload_one_module(const char *name, int warn)
116			{
117			struct module *modp = NULL;
118
119			if ((modp = findmodule_byname(name)) == NULL)
120			return -1;
121
122			if (modp->modexit)
123			modp->modexit();
124
125			assert(dlink_list_length(&mod_list) > 0);
126			dlinkDelete(&modp->node, &mod_list);
127			MyFree(modp->name);
128
129			lt_dlclose(modp->handle);
130
131			if (warn == 1)
132			{
133			ilog(L_INFO, "Module %s unloaded", name);
134			sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s unloaded", name);
135			}
136
137			return 0;
138			}
139
140			/* load_a_module()
141			*
142			* inputs - path name of module, int to notice, int of core
143			* output - -1 if error 0 if success
144			* side effects - loads a module if successful
145			*/
146			int
147			load_a_module(const char *path, int warn, int core)
148			{
149			lt_dlhandle tmpptr = NULL;
150			const char *mod_basename = NULL;
151			struct module *modp = NULL;
152
153			if (findmodule_byname((mod_basename = libio_basename(path))))
154			return 1;
155
156			if (!(tmpptr = lt_dlopen(path))) {
157			const char *err = ((err = lt_dlerror())) ? err : "<unknown>";
158
159			sendto_realops_flags(UMODE_ALL, L_ALL, "Error loading module %s: %s",
160			mod_basename, err);
161			ilog(L_WARN, "Error loading module %s: %s", mod_basename, err);
162			return -1;
163			}
164
165			if ((modp = lt_dlsym(tmpptr, "module_entry")) == NULL)
166			{
167			sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no module_entry export",
168			mod_basename);
169			ilog(L_WARN, "Module %s has no module_entry export", mod_basename);
170			lt_dlclose(tmpptr);
171			return -1;
172			}
173
174			modp->handle = tmpptr;
175
176			if (EmptyString(modp->version))
177			modp->version = unknown_ver;
178
179			if (core)
180			modp->flags \|= MODULE_FLAG_CORE;
181
182			DupString(modp->name, mod_basename);
183			dlinkAdd(modp, &modp->node, &mod_list);
184
185			if (modp->modinit)
186			modp->modinit();
187
188			if (warn == 1)
189			{
190			sendto_realops_flags(UMODE_ALL, L_ALL,
191			"Module %s [version: %s handle: %p] loaded.",
192			modp->name, modp->version, tmpptr);
193			ilog(L_WARN, "Module %s [version: %s handle: %p] loaded.",
194			modp->name, modp->version, tmpptr);
195			}
196
197			return 0;
198			}
199
200	adx	30	/*
201			* modules_init
202			*
203			* input - NONE
204			* output - NONE
205			* side effects - The basic module manipulation modules are loaded
206			*/
207			void
208			modules_init(void)
209			{
210	michael	1237	if (lt_dlinit())
211			{
212			ilog(L_ERROR, "Couldn't initialize the libltdl run time dynamic"
213			" link library. Exiting.");
214			exit(0);
215			}
216	michael	912
217	adx	30	mod_add_cmd(&modload_msgtab);
218			mod_add_cmd(&modunload_msgtab);
219			mod_add_cmd(&modreload_msgtab);
220			mod_add_cmd(&modlist_msgtab);
221			mod_add_cmd(&modrestart_msgtab);
222			}
223
224			/* mod_find_path()
225			*
226			* input - path
227			* output - none
228			* side effects - returns a module path from path
229			*/
230			static struct module_path *
231			mod_find_path(const char *path)
232			{
233			dlink_node *ptr;
234			struct module_path *mpath;
235
236			DLINK_FOREACH(ptr, mod_paths.head)
237			{
238			mpath = ptr->data;
239
240			if (!strcmp(path, mpath->path))
241			return mpath;
242			}
243
244			return NULL;
245			}
246
247			/* mod_add_path()
248			*
249			* input - path
250			* output - NONE
251			* side effects - adds path to list
252			*/
253			void
254			mod_add_path(const char *path)
255			{
256			struct module_path *pathst;
257
258			if (mod_find_path(path))
259			return;
260
261			pathst = MyMalloc(sizeof(struct module_path));
262
263			strlcpy(pathst->path, path, sizeof(pathst->path));
264			dlinkAdd(pathst, &pathst->node, &mod_paths);
265			}
266
267			/* add_conf_module
268			*
269			* input - module name
270			* output - NONE
271			* side effects - adds module to conf_mod
272			*/
273			void
274			add_conf_module(const char *name)
275			{
276			struct module_path *pathst;
277
278			pathst = MyMalloc(sizeof(struct module_path));
279
280			strlcpy(pathst->path, name, sizeof(pathst->path));
281			dlinkAdd(pathst, &pathst->node, &conf_modules);
282			}
283
284			/* mod_clear_paths()
285			*
286			* input - NONE
287			* output - NONE
288			* side effects - clear the lists of paths and conf modules
289			*/
290			void
291			mod_clear_paths(void)
292			{
293	michael	1237	struct module_path *pathst = NULL;
294			dlink_node ptr = NULL, next_ptr = NULL;
295	adx	30
296			DLINK_FOREACH_SAFE(ptr, next_ptr, mod_paths.head)
297			{
298			pathst = ptr->data;
299
300			dlinkDelete(&pathst->node, &mod_paths);
301			MyFree(pathst);
302			}
303
304			DLINK_FOREACH_SAFE(ptr, next_ptr, conf_modules.head)
305			{
306			pathst = ptr->data;
307
308			dlinkDelete(&pathst->node, &conf_modules);
309			MyFree(pathst);
310			}
311			}
312
313			/* findmodule_byname
314			*
315			* input - name of module
316			* output - NULL if not found or pointer to module
317			* side effects - NONE
318			*/
319	michael	1230	struct module *
320	adx	30	findmodule_byname(const char *name)
321			{
322	michael	1230	dlink_node *ptr = NULL;
323	adx	30
324			DLINK_FOREACH(ptr, mod_list.head)
325			{
326	michael	1230	struct module *modp = ptr->data;
327	adx	30
328	db	218	if (strcmp(modp->name, name) == 0)
329	michael	1230	return modp;
330	adx	30	}
331
332			return NULL;
333			}
334
335			/* load_all_modules()
336			*
337			* input - int flag warn
338			* output - NONE
339			* side effects - load all modules found in autoload directory
340			*/
341			void
342			load_all_modules(int warn)
343			{
344			DIR *system_module_dir = NULL;
345			struct dirent *ldirent = NULL;
346			char module_fq_name[PATH_MAX + 1];
347
348			modules_init();
349
350			if ((system_module_dir = opendir(AUTOMODPATH)) == NULL)
351			{
352			ilog(L_WARN, "Could not load modules from %s: %s",
353			AUTOMODPATH, strerror(errno));
354			return;
355			}
356
357			while ((ldirent = readdir(system_module_dir)) != NULL)
358			{
359	michael	912	if (modules_valid_suffix(ldirent->d_name))
360	adx	30	{
361			snprintf(module_fq_name, sizeof(module_fq_name), "%s/%s",
362			AUTOMODPATH, ldirent->d_name);
363			load_a_module(module_fq_name, warn, 0);
364			}
365			}
366
367			closedir(system_module_dir);
368			}
369
370			/* load_conf_modules()
371			*
372			* input - NONE
373			* output - NONE
374			* side effects - load modules given in ircd.conf
375			*/
376			void
377			load_conf_modules(void)
378			{
379			dlink_node *ptr = NULL;
380			struct module_path *mpath = NULL;
381
382			DLINK_FOREACH(ptr, conf_modules.head)
383			{
384			mpath = ptr->data;
385
386			if (findmodule_byname(mpath->path) == NULL)
387			load_one_module(mpath->path, 0);
388			}
389			}
390
391			/* load_core_modules()
392			*
393			* input - int flag warn
394			* output - NONE
395			* side effects - core modules are loaded, if any fail, kill ircd
396			*/
397			void
398			load_core_modules(int warn)
399			{
400			char module_name[PATH_MAX + 1];
401			int i = 0;
402
403			for (; core_module_table[i]; ++i)
404			{
405	michael	912	snprintf(module_name, sizeof(module_name), "%s%s",
406			MODPATH, core_module_table[i]);
407	adx	30
408			if (load_a_module(module_name, warn, 1) == -1)
409			{
410	michael	912	ilog(L_CRIT, "Error loading core module %s: terminating ircd",
411			core_module_table[i]);
412	adx	30	exit(EXIT_FAILURE);
413			}
414			}
415			}
416
417			/* load_one_module()
418			*
419			* input - pointer to path
420			* - flagged as core module or not
421			* output - -1 if error
422			* side effects - module is loaded if found.
423			*/
424			int
425	michael	978	load_one_module(const char *path, int coremodule)
426	adx	30	{
427			dlink_node *ptr = NULL;
428			char modpath[PATH_MAX + 1];
429			struct stat statbuf;
430
431			DLINK_FOREACH(ptr, mod_paths.head)
432			{
433			const struct module_path *mpath = ptr->data;
434
435			snprintf(modpath, sizeof(modpath), "%s/%s", mpath->path, path);
436
437	michael	912	if (!modules_valid_suffix(path))
438			continue;
439
440	adx	30	if (strstr(modpath, "../") == NULL &&
441			strstr(modpath, "/..") == NULL)
442			{
443			if (!stat(modpath, &statbuf))
444			{
445			if (S_ISREG(statbuf.st_mode))
446			{
447			/* Regular files only please */
448			return load_a_module(modpath, 1, coremodule);
449			}
450			}
451			}
452			}
453
454			sendto_realops_flags(UMODE_ALL, L_ALL,
455			"Cannot locate module %s", path);
456			ilog(L_WARN, "Cannot locate module %s", path);
457			return -1;
458			}
459
460			/* load a module .. */
461			static void
462			mo_modload(struct Client client_p, struct Client source_p,
463			int parc, char *parv[])
464			{
465	michael	978	const char *m_bn = NULL;
466	adx	30
467	michael	1228	if (!HasOFlag(source_p, OPER_FLAG_MODULE))
468	adx	30	{
469			sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
470			me.name, source_p->name);
471			return;
472			}
473
474	michael	978	m_bn = libio_basename(parv[1]);
475	adx	30
476			if (findmodule_byname(m_bn) != NULL)
477			{
478			sendto_one(source_p, ":%s NOTICE %s :Module %s is already loaded",
479			me.name, source_p->name, m_bn);
480			return;
481			}
482
483			load_one_module(parv[1], 0);
484			}
485
486			/* unload a module .. */
487			static void
488			mo_modunload(struct Client client_p, struct Client source_p,
489			int parc, char *parv[])
490			{
491	michael	978	const char *m_bn = NULL;
492	michael	1230	struct module *modp = NULL;
493	adx	30
494	michael	1228	if (!HasOFlag(source_p, OPER_FLAG_MODULE))
495	adx	30	{
496			sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
497			me.name, source_p->name);
498			return;
499			}
500
501	michael	978	m_bn = libio_basename(parv[1]);
502	adx	30
503	michael	1230	if ((modp = findmodule_byname(m_bn)) == NULL)
504	adx	30	{
505			sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
506			me.name, source_p->name, m_bn);
507			return;
508			}
509
510	michael	1230	if (modp->flags & MODULE_FLAG_CORE)
511	adx	30	{
512			sendto_one(source_p,
513			":%s NOTICE %s :Module %s is a core module and may not be unloaded",
514			me.name, source_p->name, m_bn);
515			return;
516			}
517
518			if (unload_one_module(m_bn, 1) == -1)
519			{
520			sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
521			me.name, source_p->name, m_bn);
522			}
523			}
524
525			/* unload and load in one! */
526			static void
527			mo_modreload(struct Client client_p, struct Client source_p,
528			int parc, char *parv[])
529			{
530	michael	978	const char *m_bn = NULL;
531	michael	1230	struct module *modp = NULL;
532	adx	30	int check_core;
533
534	michael	1228	if (!HasOFlag(source_p, OPER_FLAG_MODULE))
535	adx	30	{
536			sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
537			me.name, source_p->name);
538			return;
539			}
540
541	michael	978	m_bn = libio_basename(parv[1]);
542	adx	30
543	michael	1230	if ((modp = findmodule_byname(m_bn)) == NULL)
544	adx	30	{
545			sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
546			me.name, source_p->name, m_bn);
547			return;
548			}
549
550	michael	1230	check_core = (modp->flags & MODULE_FLAG_CORE) != 0;
551	adx	30
552			if (unload_one_module(m_bn, 1) == -1)
553			{
554			sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
555			me.name, source_p->name, m_bn);
556			return;
557			}
558
559			if ((load_one_module(parv[1], check_core) == -1) && check_core)
560			{
561			sendto_realops_flags(UMODE_ALL, L_ALL, "Error reloading core "
562			"module: %s: terminating ircd", parv[1]);
563			ilog(L_CRIT, "Error loading core module %s: terminating ircd", parv[1]);
564			exit(0);
565			}
566			}
567
568			/* list modules .. */
569			static void
570			mo_modlist(struct Client client_p, struct Client source_p,
571			int parc, char *parv[])
572			{
573	michael	912	const dlink_node *ptr = NULL;
574	adx	30
575	michael	1228	if (!HasOFlag(source_p, OPER_FLAG_MODULE))
576	adx	30	{
577			sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
578			me.name, source_p->name);
579			return;
580			}
581
582			DLINK_FOREACH(ptr, mod_list.head)
583			{
584	michael	912	const struct module *modp = ptr->data;
585	adx	30
586	michael	912	if (parc > 1 && !match(parv[1], modp->name))
587			continue;
588
589	michael	1234	sendto_one(source_p, form_str(RPL_MODLIST), me.name, source_p->name,
590	michael	912	modp->name, modp->handle,
591	michael	1230	modp->version, (modp->flags & MODULE_FLAG_CORE) ?"(core)":"");
592	adx	30	}
593
594			sendto_one(source_p, form_str(RPL_ENDOFMODLIST),
595			me.name, source_p->name);
596			}
597
598			/* unload and reload all modules */
599			static void
600			mo_modrestart(struct Client client_p, struct Client source_p,
601			int parc, char *parv[])
602			{
603			unsigned int modnum = 0;
604	michael	912	dlink_node ptr = NULL, ptr_next = NULL;
605
606	michael	1228	if (!HasOFlag(source_p, OPER_FLAG_MODULE))
607	adx	30	{
608			sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
609			me.name, source_p->name);
610			return;
611			}
612
613			sendto_one(source_p, ":%s NOTICE %s :Reloading all modules",
614			me.name, source_p->name);
615
616			modnum = dlink_list_length(&mod_list);
617
618	michael	912	DLINK_FOREACH_SAFE(ptr, ptr_next, mod_list.head)
619	adx	30	{
620	michael	912	struct module *modp = ptr->data;
621	adx	30	unload_one_module(modp->name, 0);
622			}
623
624			load_all_modules(0);
625			load_conf_modules();
626			load_core_modules(0);
627
628			sendto_realops_flags(UMODE_ALL, L_ALL,
629	michael	1013	"Module Restart: %u modules unloaded, %u modules loaded",
630	adx	30	modnum, dlink_list_length(&mod_list));
631	michael	1013	ilog(L_WARN, "Module Restart: %u modules unloaded, %u modules loaded",
632	adx	30	modnum, dlink_list_length(&mod_list));
633			}