cadey
/
elemental-ircd
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
elemental-ircd/src/modules.c

1074 lines
25 KiB
C
Raw Blame History

/*
* ircd-ratbox: A slightly useful ircd.
* modules.c: A module loader.
*
* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
* Copyright (C) 1996-2002 Hybrid Development Team
* Copyright (C) 2002-2005 ircd-ratbox development team
*
* 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
*
*/
#include "stdinc.h"
#include "modules.h"
#include "logger.h"
#include "ircd.h"
#include "client.h"
#include "send.h"
#include "s_conf.h"
#include "s_newconf.h"
#include "numeric.h"
#include "parse.h"
#include "ircd_defs.h"
#include "match.h"
#include "s_serv.h"
/* -TimeMr14C:
* I have moved the dl* function definitions and
* the two functions (load_a_module / unload_a_module) to the
* file dynlink.c
* And also made the necessary changes to those functions
* to comply with shl_load and friends.
* In this file, to keep consistency with the makefile,
* I added the ability to load *.sl files, too.
* 27/02/2002
*/
#ifndef STATIC_MODULES
struct module **modlist = NULL;
static const char *core_module_table[] = {
"m_ban",
"m_die",
"m_error",
"m_join",
"m_kick",
"m_kill",
"m_message",
"m_metadata",
"m_mode",
"m_nick",
"m_part",
"m_quit",
"m_server",
"m_squit",
NULL
};
#define MODS_INCREMENT 10
int num_mods = 0;
int max_mods = MODS_INCREMENT;
static rb_dlink_list mod_paths;
static int mo_modload(struct Client *, struct Client *, int, const char **);
static int mo_modlist(struct Client *, struct Client *, int, const char **);
static int mo_modreload(struct Client *, struct Client *, int, const char **);
static int mo_modunload(struct Client *, struct Client *, int, const char **);
static int mo_modrestart(struct Client *, struct Client *, int, const char **);
static int me_modload(struct Client *, struct Client *, int, const char **);
static int me_modlist(struct Client *, struct Client *, int, const char **);
static int me_modreload(struct Client *, struct Client *, int, const char **);
static int me_modunload(struct Client *, struct Client *, int, const char **);
static int me_modrestart(struct Client *, struct Client *, int, const char **);
static int do_modload(struct Client *, const char *);
static int do_modunload(struct Client *, const char *);
static int do_modreload(struct Client *, const char *);
static int do_modlist(struct Client *, const char *);
static int do_modrestart(struct Client *);
struct Message modload_msgtab = {
"MODLOAD", 0, 0, 0, MFLG_SLOW,
{mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_modload, 2}, {mo_modload, 2}}
};
struct Message modunload_msgtab = {
"MODUNLOAD", 0, 0, 0, MFLG_SLOW,
{mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_modunload, 2}, {mo_modunload, 2}}
};
struct Message modreload_msgtab = {
"MODRELOAD", 0, 0, 0, MFLG_SLOW,
{mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_modreload, 2}, {mo_modreload, 2}}
};
struct Message modlist_msgtab = {
"MODLIST", 0, 0, 0, MFLG_SLOW,
{mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_modlist, 0}, {mo_modlist, 0}}
};
struct Message modrestart_msgtab = {
"MODRESTART", 0, 0, 0, MFLG_SLOW,
{mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_modrestart, 0}, {mo_modrestart, 0}}
};
void
modules_init(void)
{
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);
/* Add the default paths we look in to the module system --nenolod */
mod_add_path(MODPATH);
mod_add_path(AUTOMODPATH);
}
/* 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)
{
rb_dlink_node *ptr;
struct module_path *mpath;
RB_DLINK_FOREACH(ptr, mod_paths.head)
{
mpath = ptr->data;
if(!strcmp(path, mpath->path))
return mpath;
}
return NULL;
}
/* mod_add_path
*
* input - path
* ouput -
* side effects - adds path to list
*/
void
mod_add_path(const char *path)
{
struct module_path *pathst;
if(mod_find_path(path))
return;
pathst = rb_malloc(sizeof(struct module_path));
strcpy(pathst->path, path);
rb_dlinkAddAlloc(pathst, &mod_paths);
}
/* mod_clear_paths()
*
* input -
* output -
* side effects - clear the lists of paths
*/
void
mod_clear_paths(void)
{
rb_dlink_node *ptr, *next_ptr;
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, mod_paths.head)
{
rb_free(ptr->data);
rb_free_rb_dlink_node(ptr);
}
mod_paths.head = mod_paths.tail = NULL;
mod_paths.length = 0;
}
/* findmodule_byname
*
* input -
* output -
* side effects -
*/
int
findmodule_byname(const char *name)
{
int i;
for (i = 0; i < num_mods; i++)
{
if(!irccmp(modlist[i]->name, name))
return i;
}
return -1;
}
/* load_all_modules()
*
* input -
* output -
* side effects -
*/
void
load_all_modules(int warn)
{
DIR *system_module_dir = NULL;
struct dirent *ldirent = NULL;
char module_fq_name[PATH_MAX + 1];
int len;
modules_init();
modlist = (struct module **) rb_malloc(sizeof(struct module) * (MODS_INCREMENT));
max_mods = MODS_INCREMENT;
system_module_dir = opendir(AUTOMODPATH);
if(system_module_dir == NULL)
{
ilog(L_MAIN, "Could not load modules from %s: %s", AUTOMODPATH, strerror(errno));
return;
}
while ((ldirent = readdir(system_module_dir)) != NULL)
{
len = strlen(ldirent->d_name);
if((len > 3) && !strcmp(ldirent->d_name+len-3, SHARED_SUFFIX))
{
(void) rb_snprintf(module_fq_name, sizeof(module_fq_name), "%s/%s", AUTOMODPATH, ldirent->d_name);
(void) load_a_module(module_fq_name, warn, 0);
}
}
(void) closedir(system_module_dir);
}
/* load_core_modules()
*
* input -
* output -
* side effects - core modules are loaded, if any fail, kill ircd
*/
void
load_core_modules(int warn)
{
char module_name[MAXPATHLEN];
int i;
for (i = 0; core_module_table[i]; i++)
{
rb_snprintf(module_name, sizeof(module_name), "%s/%s%s", MODPATH,
core_module_table[i], SHARED_SUFFIX);
if(load_a_module(module_name, warn, 1) == -1)
{
ilog(L_MAIN,
"Error loading core module %s%s: terminating ircd",
core_module_table[i], SHARED_SUFFIX);
exit(0);
}
}
}
/* load_one_module()
*
* input -
* output -
* side effects -
*/
int
load_one_module(const char *path, int coremodule)
{
char modpath[MAXPATHLEN];
rb_dlink_node *pathst;
struct module_path *mpath;
struct stat statbuf;
if (server_state_foreground == 1)
inotice("loading module %s ...", path);
RB_DLINK_FOREACH(pathst, mod_paths.head)
{
mpath = pathst->data;
rb_snprintf(modpath, sizeof(modpath), "%s/%s", mpath->path, path);
if((strstr(modpath, "../") == NULL) && (strstr(modpath, "/..") == NULL))
{
if(stat(modpath, &statbuf) == 0)
{
if(S_ISREG(statbuf.st_mode))
{
/* Regular files only please */
if(coremodule)
return load_a_module(modpath, 1, 1);
else
return load_a_module(modpath, 1, 0);
}
}
}
}
sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "Cannot locate module %s", path);
return -1;
}
/* load a module .. */
static int
mo_modload(struct Client *client_p, struct Client *source_p, int parc, const char **parv)
{
if(!IsOperAdmin(source_p))
{
sendto_one(source_p, form_str(ERR_NOPRIVS),
me.name, source_p->name, "admin");
return 0;
}
if(parc > 2)
{
sendto_match_servs(source_p, parv[2], CAP_ENCAP, NOCAPS,
"ENCAP %s MODLOAD %s", parv[2], parv[1]);
if (match(parv[2], me.name) == 0)
return 0;
}
return do_modload(source_p, parv[1]);
}
static int
me_modload(struct Client *client_p, struct Client *source_p, int parc, const char **parv)
{
if(!find_shared_conf(source_p->username, source_p->host, source_p->servptr->name, SHARED_MODULE))
{
sendto_one_notice(source_p, ":*** You do not have an appropriate shared block "
"to load modules on this server.");
return 0;
}
return do_modload(source_p, parv[1]);
}
static int
do_modload(struct Client *source_p, const char *module)
{
char *m_bn = rb_basename(module);
if(findmodule_byname(m_bn) != -1)
{
sendto_one_notice(source_p, ":Module %s is already loaded", m_bn);
rb_free(m_bn);
return 0;
}
load_one_module(module, 0);
rb_free(m_bn);
return 0;
}
/* unload a module .. */
static int
mo_modunload(struct Client *client_p, struct Client *source_p, int parc, const char **parv)
{
if(!IsOperAdmin(source_p))
{
sendto_one(source_p, form_str(ERR_NOPRIVS),
me.name, source_p->name, "admin");
return 0;
}
if(parc > 2)
{
sendto_match_servs(source_p, parv[2], CAP_ENCAP, NOCAPS,
"ENCAP %s MODUNLOAD %s", parv[2], parv[1]);
if (match(parv[2], me.name) == 0)
return 0;
}
return do_modunload(source_p, parv[1]);
}
static int
me_modunload(struct Client *client_p, struct Client *source_p, int parc, const char **parv)
{
if(!find_shared_conf(source_p->username, source_p->host, source_p->servptr->name, SHARED_MODULE))
{
sendto_one_notice(source_p, ":*** You do not have an appropriate shared block "
"to load modules on this server.");
return 0;
}
return do_modunload(source_p, parv[1]);
}
static int
do_modunload(struct Client *source_p, const char *module)
{
int modindex;
char *m_bn = rb_basename(module);
if((modindex = findmodule_byname(m_bn)) == -1)
{
sendto_one_notice(source_p, ":Module %s is not loaded", m_bn);
rb_free(m_bn);
return 0;
}
if(modlist[modindex]->core == 1)
{
sendto_one_notice(source_p, ":Module %s is a core module and may not be unloaded", m_bn);
rb_free(m_bn);
return 0;
}
if(unload_one_module(m_bn, 1) == -1)
{
sendto_one_notice(source_p, ":Module %s is not loaded", m_bn);
}
rb_free(m_bn);
return 0;
}
/* unload and load in one! */
static int
mo_modreload(struct Client *client_p, struct Client *source_p, int parc, const char **parv)
{
if(!IsOperAdmin(source_p))
{
sendto_one(source_p, form_str(ERR_NOPRIVS),
me.name, source_p->name, "admin");
return 0;
}
if(parc > 2)
{
sendto_match_servs(source_p, parv[2], CAP_ENCAP, NOCAPS,
"ENCAP %s MODRELOAD %s", parv[2], parv[1]);
if (match(parv[2], me.name) == 0)
return 0;
}
return do_modreload(source_p, parv[1]);
}
static int
me_modreload(struct Client *client_p, struct Client *source_p, int parc, const char **parv)
{
if(!find_shared_conf(source_p->username, source_p->host, source_p->servptr->name, SHARED_MODULE))
{
sendto_one_notice(source_p, ":*** You do not have an appropriate shared block "
"to load modules on this server.");
return 0;
}
return do_modreload(source_p, parv[1]);
}
static int
do_modreload(struct Client *source_p, const char *module)
{
int modindex;
int check_core;
char *m_bn = rb_basename(module);
if((modindex = findmodule_byname(m_bn)) == -1)
{
sendto_one_notice(source_p, ":Module %s is not loaded", m_bn);
rb_free(m_bn);
return 0;
}
check_core = modlist[modindex]->core;
if(unload_one_module(m_bn, 1) == -1)
{
sendto_one_notice(source_p, ":Module %s is not loaded", m_bn);
rb_free(m_bn);
return 0;
}
if((load_one_module(m_bn, check_core) == -1) && check_core)
{
sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
"Error reloading core module: %s: terminating ircd", m_bn);
ilog(L_MAIN, "Error loading core module %s: terminating ircd", m_bn);
exit(0);
}
rb_free(m_bn);
return 0;
}
/* list modules .. */
static int
mo_modlist(struct Client *client_p, struct Client *source_p, int parc, const char **parv)
{
if(!IsOperAdmin(source_p))
{
sendto_one(source_p, form_str(ERR_NOPRIVS),
me.name, source_p->name, "admin");
return 0;
}
if(parc > 2)
{
sendto_match_servs(source_p, parv[2], CAP_ENCAP, NOCAPS,
"ENCAP %s MODLIST %s", parv[2], parv[1]);
if (match(parv[2], me.name) == 0)
return 0;
}
return do_modlist(source_p, parc > 1 ? parv[1] : 0);
}
static int
me_modlist(struct Client *client_p, struct Client *source_p, int parc, const char **parv)
{
if(!find_shared_conf(source_p->username, source_p->host, source_p->servptr->name, SHARED_MODULE))
{
sendto_one_notice(source_p, ":*** You do not have an appropriate shared block "
"to load modules on this server.");
return 0;
}
return do_modlist(source_p, parv[1]);
}
static int
do_modlist(struct Client *source_p, const char *pattern)
{
int i;
for (i = 0; i < num_mods; i++)
{
if(pattern)
{
if(match(pattern, modlist[i]->name))
{
sendto_one(source_p, form_str(RPL_MODLIST),
me.name, source_p->name,
modlist[i]->name,
modlist[i]->address,
modlist[i]->version, modlist[i]->core ? "(core)" : "");
}
}
else
{
sendto_one(source_p, form_str(RPL_MODLIST),
me.name, source_p->name, modlist[i]->name,
modlist[i]->address, modlist[i]->version,
modlist[i]->core ? "(core)" : "");
}
}
sendto_one(source_p, form_str(RPL_ENDOFMODLIST), me.name, source_p->name);
return 0;
}
/* unload and reload all modules */
static int
mo_modrestart(struct Client *client_p, struct Client *source_p, int parc, const char **parv)
{
if(!IsOperAdmin(source_p))
{
sendto_one(source_p, form_str(ERR_NOPRIVS),
me.name, source_p->name, "admin");
return 0;
}
if(parc > 1)
{
sendto_match_servs(source_p, parv[1], CAP_ENCAP, NOCAPS,
"ENCAP %s MODRESTART", parv[1]);
if (match(parv[1], me.name) == 0)
return 0;
}
return do_modrestart(source_p);
}
static int
me_modrestart(struct Client *client_p, struct Client *source_p, int parc, const char **parv)
{
if(!find_shared_conf(source_p->username, source_p->host, source_p->servptr->name, SHARED_MODULE))
{
sendto_one_notice(source_p, ":*** You do not have an appropriate shared block "
"to load modules on this server.");
return 0;
}
return do_modrestart(source_p);
}
static int
do_modrestart(struct Client *source_p)
{
int modnum;
sendto_one_notice(source_p, ":Reloading all modules");
modnum = num_mods;
while (num_mods)
unload_one_module(modlist[0]->name, 0);
load_all_modules(0);
load_core_modules(0);
rehash(0);
sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
"Module Restart: %d modules unloaded, %d modules loaded",
modnum, num_mods);
ilog(L_MAIN, "Module Restart: %d modules unloaded, %d modules loaded", modnum, num_mods);
return 0;
}
#ifndef RTLD_NOW
#define RTLD_NOW RTLD_LAZY /* openbsd deficiency */
#endif
#ifndef RTLD_LOCAL
#define RTLD_LOCAL 0
#endif
#ifdef CHARYBDIS_PROFILE
# ifndef RTLD_PROFILE
# warning libdl may not support profiling, sucks. :(
# define RTLD_PROFILE 0
# endif
#endif
static void increase_modlist(void);
#define MODS_INCREMENT 10
static char unknown_ver[] = "<unknown>";
/* This file contains the core functions to use dynamic libraries.
* -TimeMr14C
*/
#ifdef HAVE_MACH_O_DYLD_H
/*
** jmallett's dl*(3) shims for NSModule(3) systems.
*/
#include <mach-o/dyld.h>
#ifndef HAVE_DLOPEN
#ifndef RTLD_LAZY
#define RTLD_LAZY 2185 /* built-in dl*(3) don't care */
#endif
void undefinedErrorHandler(const char *);
NSModule multipleErrorHandler(NSSymbol, NSModule, NSModule);
void linkEditErrorHandler(NSLinkEditErrors, int, const char *, const char *);
char *dlerror(void);
void *dlopen(char *, int);
int dlclose(void *);
void *dlsym(void *, char *);
static int firstLoad = TRUE;
static int myDlError;
static char *myErrorTable[] = { "Loading file as object failed\n",
"Loading file as object succeeded\n",
"Not a valid shared object\n",
"Architecture of object invalid on this architecture\n",
"Invalid or corrupt image\n",
"Could not access object\n",
"NSCreateObjectFileImageFromFile failed\n",
NULL
};
void
undefinedErrorHandler(const char *symbolName)
{
sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "Undefined symbol: %s", symbolName);
ilog(L_MAIN, "Undefined symbol: %s", symbolName);
return;
}
NSModule
multipleErrorHandler(NSSymbol s, NSModule old, NSModule new)
{
/* XXX
** This results in substantial leaking of memory... Should free one
** module, maybe?
*/
sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
"Symbol `%s' found in `%s' and `%s'",
NSNameOfSymbol(s), NSNameOfModule(old), NSNameOfModule(new));
ilog(L_MAIN, "Symbol `%s' found in `%s' and `%s'",
NSNameOfSymbol(s), NSNameOfModule(old), NSNameOfModule(new));
/* We return which module should be considered valid, I believe */
return new;
}
void
linkEditErrorHandler(NSLinkEditErrors errorClass, int errnum,
const char *fileName, const char *errorString)
{
sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
"Link editor error: %s for %s", errorString, fileName);
ilog(L_MAIN, "Link editor error: %s for %s", errorString, fileName);
return;
}
char *
dlerror(void)
{
return myDlError == NSObjectFileImageSuccess ? NULL : myErrorTable[myDlError % 7];
}
void *
dlopen(char *filename, int unused)
{
NSObjectFileImage myImage;
NSModule myModule;
if(firstLoad)
{
/*
** If we are loading our first symbol (huzzah!) we should go ahead
** and install link editor error handling!
*/
NSLinkEditErrorHandlers linkEditorErrorHandlers;
linkEditorErrorHandlers.undefined = undefinedErrorHandler;
linkEditorErrorHandlers.multiple = multipleErrorHandler;
linkEditorErrorHandlers.linkEdit = linkEditErrorHandler;
NSInstallLinkEditErrorHandlers(&linkEditorErrorHandlers);
firstLoad = FALSE;
}
myDlError = NSCreateObjectFileImageFromFile(filename, &myImage);
if(myDlError != NSObjectFileImageSuccess)
{
return NULL;
}
myModule = NSLinkModule(myImage, filename, NSLINKMODULE_OPTION_PRIVATE);
return (void *) myModule;
}
int
dlclose(void *myModule)
{
NSUnLinkModule(myModule, FALSE);
return 0;
}
void *
dlsym(void *myModule, char *mySymbolName)
{
NSSymbol mySymbol;
mySymbol = NSLookupSymbolInModule((NSModule) myModule, mySymbolName);
return NSAddressOfSymbol(mySymbol);
}
#endif
#endif
/*
* HPUX dl compat functions
*/
#if defined(HAVE_SHL_LOAD) && !defined(HAVE_DLOPEN)
#define RTLD_LAZY BIND_DEFERRED
#define RTLD_GLOBAL DYNAMIC_PATH
#define dlopen(file,mode) (void *)shl_load((file), (mode), (long) 0)
#define dlclose(handle) shl_unload((shl_t)(handle))
#define dlsym(handle,name) hpux_dlsym(handle,name)
#define dlerror() strerror(errno)
static void *
hpux_dlsym(void *handle, char *name)
{
void *sym_addr;
if(!shl_findsym((shl_t *) & handle, name, TYPE_UNDEFINED, &sym_addr))
return sym_addr;
return NULL;
}
#endif
/* 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)
{
int modindex;
if((modindex = findmodule_byname(name)) == -1)
return -1;
/*
** XXX - The type system in C does not allow direct conversion between
** data and function pointers, but as it happens, most C compilers will
** safely do this, however it is a theoretical overlow to cast as we
** must do here. I have library functions to take care of this, but
** despite being more "correct" for the C language, this is more
** practical. Removing the abuse of the ability to cast ANY pointer
** to and from an integer value here will break some compilers.
** -jmallett
*/
/* Left the comment in but the code isn't here any more -larne */
switch (modlist[modindex]->mapi_version)
{
case 1:
{
struct mapi_mheader_av1 *mheader = modlist[modindex]->mapi_header;
if(mheader->mapi_command_list)
{
struct Message **m;
for (m = mheader->mapi_command_list; *m; ++m)
mod_del_cmd(*m);
}
/* hook events are never removed, we simply lose the
* ability to call them --fl
*/
if(mheader->mapi_hfn_list)
{
mapi_hfn_list_av1 *m;
for (m = mheader->mapi_hfn_list; m->hapi_name; ++m)
remove_hook(m->hapi_name, m->fn);
}
if(mheader->mapi_unregister)
mheader->mapi_unregister();
break;
}
default:
sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
"Unknown/unsupported MAPI version %d when unloading %s!",
modlist[modindex]->mapi_version, modlist[modindex]->name);
ilog(L_MAIN, "Unknown/unsupported MAPI version %d when unloading %s!",
modlist[modindex]->mapi_version, modlist[modindex]->name);
break;
}
dlclose(modlist[modindex]->address);
rb_free(modlist[modindex]->name);
memmove(&modlist[modindex], &modlist[modindex + 1],
sizeof(struct module) * ((num_mods - 1) - modindex));
if(num_mods != 0)
num_mods--;
if(warn == 1)
{
ilog(L_MAIN, "Module %s unloaded", name);
sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "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)
{
void *tmpptr = NULL;
char *mod_basename;
const char *ver;
int *mapi_version;
mod_basename = rb_basename(path);
#ifdef CHARYBDIS_PROFILE
tmpptr = dlopen(path, RTLD_NOW | RTLD_LOCAL | RTLD_PROFILE);
#else
tmpptr = dlopen(path, RTLD_NOW | RTLD_LOCAL);
#endif
if(tmpptr == NULL)
{
const char *err = dlerror();
sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
"Error loading module %s: %s", mod_basename, err);
ilog(L_MAIN, "Error loading module %s: %s", mod_basename, err);
rb_free(mod_basename);
return -1;
}
/*
* _mheader is actually a struct mapi_mheader_*, but mapi_version
* is always the first member of this structure, so we treate it
* as a single int in order to determine the API version.
* -larne.
*/
mapi_version = (int *) (uintptr_t) dlsym(tmpptr, "_mheader");
if((mapi_version == NULL
&& (mapi_version = (int *) (uintptr_t) dlsym(tmpptr, "__mheader")) == NULL)
|| MAPI_MAGIC(*mapi_version) != MAPI_MAGIC_HDR)
{
sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
"Data format error: module %s has no MAPI header.",
mod_basename);
ilog(L_MAIN, "Data format error: module %s has no MAPI header.", mod_basename);
(void) dlclose(tmpptr);
rb_free(mod_basename);
return -1;
}
switch (MAPI_VERSION(*mapi_version))
{
case 1:
{
struct mapi_mheader_av1 *mheader = (struct mapi_mheader_av1 *) mapi_version; /* see above */
if(mheader->mapi_register && (mheader->mapi_register() == -1))
{
ilog(L_MAIN, "Module %s indicated failure during load.",
mod_basename);
sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
"Module %s indicated failure during load.",
mod_basename);
dlclose(tmpptr);
rb_free(mod_basename);
return -1;
}
if(mheader->mapi_command_list)
{
struct Message **m;
for (m = mheader->mapi_command_list; *m; ++m)
mod_add_cmd(*m);
}
if(mheader->mapi_hook_list)
{
mapi_hlist_av1 *m;
for (m = mheader->mapi_hook_list; m->hapi_name; ++m)
*m->hapi_id = register_hook(m->hapi_name);
}
if(mheader->mapi_hfn_list)
{
mapi_hfn_list_av1 *m;
for (m = mheader->mapi_hfn_list; m->hapi_name; ++m)
add_hook(m->hapi_name, m->fn);
}
ver = mheader->mapi_module_version;
break;
}
default:
ilog(L_MAIN, "Module %s has unknown/unsupported MAPI version %d.",
mod_basename, MAPI_VERSION(*mapi_version));
sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
"Module %s has unknown/unsupported MAPI version %d.",
mod_basename, *mapi_version);
dlclose(tmpptr);
rb_free(mod_basename);
return -1;
}
if(ver == NULL)
ver = unknown_ver;
increase_modlist();
modlist[num_mods] = rb_malloc(sizeof(struct module));
modlist[num_mods]->address = tmpptr;
modlist[num_mods]->version = ver;
modlist[num_mods]->core = core;
modlist[num_mods]->name = rb_strdup(mod_basename);
modlist[num_mods]->mapi_header = mapi_version;
modlist[num_mods]->mapi_version = MAPI_VERSION(*mapi_version);
num_mods++;
if(warn == 1)
{
sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
"Module %s [version: %s; MAPI version: %d] loaded at 0x%lx",
mod_basename, ver, MAPI_VERSION(*mapi_version),
(unsigned long) tmpptr);
ilog(L_MAIN, "Module %s [version: %s; MAPI version: %d] loaded at 0x%lx",
mod_basename, ver, MAPI_VERSION(*mapi_version), (unsigned long) tmpptr);
}
rb_free(mod_basename);
return 0;
}
/*
* increase_modlist
*
* inputs - NONE
* output - NONE
* side effects - expand the size of modlist if necessary
*/
static void
increase_modlist(void)
{
struct module **new_modlist = NULL;
if((num_mods + 1) < max_mods)
return;
new_modlist = (struct module **) rb_malloc(sizeof(struct module) *
(max_mods + MODS_INCREMENT));
memcpy((void *) new_modlist, (void *) modlist, sizeof(struct module) * num_mods);
rb_free(modlist);
modlist = new_modlist;
max_mods += MODS_INCREMENT;
}
#else /* STATIC_MODULES */
/* load_all_modules()
*
* input -
* output -
* side effects - all the msgtabs are added for static modules
*/
void
load_all_modules(int warn)
{
load_static_modules();
}
#endif /* STATIC_MODULES */
Reference in New Issue View Git Blame Copy Permalink