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/*
* Copyright (C) 2011 Andreas Steffen, HSR Hochschule fuer Technik Rapperswil
*
* 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.
*/
#include "imcv.h"
#include "ietf/ietf_attr.h"
#include "ita/ita_attr.h"
#include <utils/debug.h>
#include <utils/utils.h>
#include <pen/pen.h>
#include <syslog.h>
#define IMCV_DEBUG_LEVEL 1
#define IMCV_DEFAULT_POLICY_SCRIPT "ipsec _imv_policy"
/**
* PA-TNC attribute manager
*/
pa_tnc_attr_manager_t *imcv_pa_tnc_attributes;
/**
* Global IMV database
*/
imv_database_t *imcv_db;
/**
* Reference count for libimcv
*/
static refcount_t libimcv_ref = 0;
/**
* Reference count for libstrongswan
*/
static refcount_t libstrongswan_ref = 0;
/**
* Global configuration of imcv dbg function
*/
static int imcv_debug_level;
static bool imcv_stderr_quiet;
/**
* imvc dbg function
*/
static void imcv_dbg(debug_t group, level_t level, char *fmt, ...)
{
int priority = LOG_INFO;
char buffer[8192];
char *current = buffer, *next;
va_list args;
if (level <= imcv_debug_level)
{
if (!imcv_stderr_quiet)
{
va_start(args, fmt);
fprintf(stderr, "[HSR] ");
vfprintf(stderr, fmt, args);
fprintf(stderr, "\n");
va_end(args);
}
/* write in memory buffer first */
va_start(args, fmt);
vsnprintf(buffer, sizeof(buffer), fmt, args);
va_end(args);
/* do a syslog with every line */
while (current)
{
next = strchr(current, '\n');
if (next)
{
*(next++) = '\0';
}
syslog(priority, "[HSR] %s\n", current);
current = next;
}
}
}
/**
* Described in header.
*/
bool libimcv_init(bool is_imv)
{
/* initialize libstrongswan library only once */
if (lib)
{
/* did main program initialize libstrongswan? */
if (libstrongswan_ref == 0)
{
ref_get(&libstrongswan_ref);
}
}
else
{
/* we are the first to initialize libstrongswan */
if (!library_init(NULL, "libimcv"))
{
return FALSE;
}
/* set the debug level and stderr output */
imcv_debug_level = lib->settings->get_int(lib->settings,
"libimcv.debug_level", IMCV_DEBUG_LEVEL);
imcv_stderr_quiet = lib->settings->get_int(lib->settings,
"libimcv.stderr_quiet", FALSE);
/* activate the imcv debugging hook */
dbg = imcv_dbg;
openlog("imcv", 0, LOG_DAEMON);
if (!lib->plugins->load(lib->plugins,
lib->settings->get_str(lib->settings, "libimcv.load",
"random nonce gmp pubkey x509")))
{
library_deinit();
return FALSE;
}
}
ref_get(&libstrongswan_ref);
lib->settings->add_fallback(lib->settings, "%s.imcv", "libimcv", lib->ns);
lib->settings->add_fallback(lib->settings, "%s.plugins", "libimcv.plugins",
lib->ns);
if (libimcv_ref == 0)
{
char *uri, *script;
/* initialize the PA-TNC attribute manager */
imcv_pa_tnc_attributes = pa_tnc_attr_manager_create();
imcv_pa_tnc_attributes->add_vendor(imcv_pa_tnc_attributes, PEN_IETF,
ietf_attr_create_from_data, ietf_attr_names);
imcv_pa_tnc_attributes->add_vendor(imcv_pa_tnc_attributes, PEN_ITA,
ita_attr_create_from_data, ita_attr_names);
/* attach global IMV database */
if (is_imv)
{
uri = lib->settings->get_str(lib->settings,
"%s.imcv.database", NULL, lib->ns);
script = lib->settings->get_str(lib->settings,
"%s.imcv.policy_script", IMCV_DEFAULT_POLICY_SCRIPT,
lib->ns);
if (uri)
{
imcv_db = imv_database_create(uri, script);
}
}
DBG1(DBG_LIB, "libimcv initialized");
}
ref_get(&libimcv_ref);
return TRUE;
}
/**
* Described in header.
*/
void libimcv_deinit(void)
{
if (ref_put(&libimcv_ref))
{
imcv_pa_tnc_attributes->remove_vendor(imcv_pa_tnc_attributes, PEN_IETF);
imcv_pa_tnc_attributes->remove_vendor(imcv_pa_tnc_attributes, PEN_ITA);
DESTROY_IF(imcv_pa_tnc_attributes);
imcv_pa_tnc_attributes = NULL;
DESTROY_IF(imcv_db);
DBG1(DBG_LIB, "libimcv terminated");
}
if (ref_put(&libstrongswan_ref))
{
library_deinit();
}
}
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