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/*
* WallFire -- a comprehensive firewall administration tool.
*
* Copyright (C) 2001 Herv Eychenne <rv@wallfire.org>
*
* 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.
*
*/
using namespace std;
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <unistd.h> /* for getcwd() */
#ifdef USE_DYNAMIC
# ifdef HAVE_DLFCN_H
# include <dlfcn.h>
# endif
# ifdef HAVE_DL_H
# include <dl.h>
# endif
#endif
#include "wfoutmodule.h"
#include "module-info.cc" /* file generated by mkmodinfo.sh */
#include "defs.h"
/* portability -- HPUX support untested... RV@@0 */
#ifdef HPUX
# ifndef BIND_IMMEDIATE
# define BIND_IMMEDIATE 0
# endif
# define DLOPEN(file) ((void *) shl_load((file), BIND_IMMEDIATE, 0))
# define DLCLOSE(handle) (shl_unload((shl_t) (handle)))
# define DLSYM(handle, name, sym) (shl_findsym((shl_t *) (&(handle)), (name), \
TYPE_PROCEDURE, (void *) (&(sym))) == 0 && sym != NULL)
# define DLERROR() (strerror(errno))
#else /* not HPUX */
# ifndef RTLD_NOW
# define RTLD_NOW 0
# endif
# define DLOPEN(file) (dlopen((file), RTLD_NOW))
# define DLCLOSE(handle) (dlclose((handle)))
# define DLSYM(handle, name, sym) (((sym) = dlsym((handle), (name))) != NULL)
# define DLERROR() (dlerror())
#endif
/* define path correctly RV@@7 */
static string modulepath = "output_modules/ipchains/.libs:output_modules/netfilter/.libs:output_modules/text/.libs:output_modules/html/.libs:output_modules/xml/.libs";
typedef wf_outmodule* (*initfunc)(void);
wf_outmodule*
wf_outmodule_init(const string& name) {
initfunc moduleinit;
/* Try to instanciate the module if it is built-in (static). */
/* The function new_module is defined in module-info.cc
module-info.cc is generated by mkmodinfo.sh */
/* first have a look in the static modules list */
int modulesnbr = sizeof(outmodules) / sizeof(wf_outmodulelist);
int i;
for (i = 0; i < modulesnbr; i++) {
if (outmodules[i].name == name) {
moduleinit = outmodules[i].initfunc;
return moduleinit();
}
}
/* Wanted module is not built-in. Maybe dynamic (if supported)? */
#ifdef USE_DYNAMIC
unsigned int pos, oldpos = 0;
string fname = "libwf" + name + ".so";
void* handle = NULL;
do {
pos = modulepath.find(':', oldpos);
string path = modulepath.substr(oldpos, pos - oldpos);
oldpos = pos + 1;
if (path.empty())
path = fname; /* lookup in LD_LIBRARY_PATH */
else {
if (path[0] != '/') {
char* str = getcwd(NULL, 0);
path = string(str) + '/' + path;
free(str);
}
path += '/' + fname;
}
// cerr << path << endl;
handle = DLOPEN(path.c_str());
if (handle != NULL)
break;
} while (pos != string::npos);
if (handle == NULL) {
fprintf(stderr, _("Error: cannot load module `%s': %s.\n"),
name.c_str(), DLERROR());
return NULL;
}
string symname = "wf_outmodule_" + name + "_init";
void* symaddr;
// cerr << "sym: " << symname << endl;
if (!DLSYM(handle, symname.c_str(), symaddr)) {
fprintf(stderr, _("Error: cannot load module `%s': %s.\n"), name.c_str(),
DLERROR());
DLCLOSE(handle);
return NULL;
}
moduleinit = (initfunc)symaddr;
return moduleinit();
#else
/* Dynamic modules unsupported, and wanted module is not built-in. */
return NULL;
#endif
}
ostream&
wf_outmodule_available_modules_print(ostream& os) {
int modulesnbr = sizeof(outmodules) / sizeof(wf_outmodulelist);
if (modulesnbr) {
int i;
os << _("Built-in modules: ");
for (i = 0; i < modulesnbr; i++)
os << outmodules[i].name << ' ';
os << endl;
}
else
os << _("No built-in modules.") << endl;
#ifdef USE_DYNAMIC
os << _("Dynamic loading of modules supported.") << endl;
#if 0
os << _("Available dynamic modules: ");
/*
Here we should do the following: RV@@4
Through modulepath directories, try to open files of the desired form
`libwf*.so'. If open succeeds, try to load them to see if they are
functional then unload them.
*/
os << endl;
#endif
#else
os << _("Dynamic loading of modules not supported.") << endl;
#endif
return os;
}
bool
wf_outmodule::print(const wf_logentries& logentries, ostream& os) {
list<wf_logentry*>::const_iterator first = logentries.elems.begin(),
last = logentries.elems.end();
for (; first != last; ++first) {
if (print(*first, os) == false)
return false;
os << endl;
}
return true;
}
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