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/* strongSwan KLIPS starter
* Copyright (C) 2001-2002 Mathieu Lafon - Arkoon Network Security
*
* 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. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*
* RCSID $Id: klips.c,v 1.8 2006/02/15 18:33:57 as Exp $
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <string.h>
#include <freeswan.h>
#include "../pluto/constants.h"
#include "../pluto/defs.h"
#include "../pluto/log.h"
#include "confread.h"
#include "klips.h"
#include "files.h"
#include "exec.h"
static int _klips_module_loaded = 0;
bool
starter_klips_init(void)
{
struct stat stb;
if (stat(PROC_IPSECVERSION, &stb) != 0)
{
if (stat(PROC_MODULES, &stb) == 0)
{
unsetenv("MODPATH");
unsetenv("MODULECONF");
system("depmod -a >/dev/null 2>&1");
system("modprobe -qv ipsec");
}
if (stat(PROC_IPSECVERSION, &stb) == 0)
{
_klips_module_loaded = 1;
}
else
{
DBG(DBG_CONTROL,
DBG_log("kernel appears to lack KLIPS")
)
return FALSE;
}
}
/* make sure that all available crypto algorithms are loaded */
if (stat(PROC_MODULES, &stb) == 0)
{
system("modprobe -qv ipsec_aes");
system("modprobe -qv ipsec_serpent");
system("modprobe -qv ipsec_twofish");
system("modprobe -qv ipsec_blowfish");
system("modprobe -qv ipsec_sha2");
}
starter_klips_clear();
DBG(DBG_CONTROL,
DBG_log("Found KLIPS IPsec stack")
)
return TRUE;
}
static void
_sysflags (char *name, int value)
{
int res = starter_exec("echo %d >%s/%s 2>/dev/null"
, value? 1 : 0, PROC_SYSFLAGS, name);
if (res)
plog("can't set sysflag %s to %d", name, value? 1 : 0);
}
void
starter_klips_set_config(starter_config_t *cfg)
{
char **l;
_sysflags("icmp", cfg->setup.fragicmp);
_sysflags("inbound_policy_check", 1);
/* _sysflags("no_eroute_pass", 0); */
/* _sysflags("opportunistic", 0); */
_sysflags("tos", cfg->setup.hidetos);
starter_exec("%s/klipsdebug --none", IPSEC_EXECDIR);
for (l = cfg->setup.klipsdebug; l && *l; l++)
{
if ((streq(*l, "none")) || (streq(*l, "all")))
starter_exec("%s/klipsdebug --%s", IPSEC_EXECDIR, *l);
else
starter_exec("%s/klipsdebug --set %s", IPSEC_EXECDIR, *l);
}
starter_exec("%s/eroute --del --eraf inet --src 0/0 --dst 0/0 2>/dev/null"
, IPSEC_EXECDIR);
starter_exec("%s/eroute --label packetdefault --replace --eraf inet "
"--src 0/0 --dst 0/0 --said %%%s", IPSEC_EXECDIR
, cfg->setup.packetdefault ? cfg->setup.packetdefault : "drop");
}
void
starter_klips_clear(void)
{
system(IPSEC_EXECDIR"/eroute --clear");
system(IPSEC_EXECDIR"/spi --clear");
system(IPSEC_EXECDIR"/klipsdebug --none");
}
void
starter_klips_cleanup(void)
{
starter_klips_clear();
if (_klips_module_loaded)
{
system("rmmod ipsec");
_klips_module_loaded = 0;
}
}
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