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/*
* OpenVPN -- An application to securely tunnel IP networks
* over a single TCP/UDP port, with support for SSL/TLS-based
* session authentication and key exchange,
* packet encryption, packet authentication, and
* packet compression.
*
* Copyright (C) 2002-2018 OpenVPN Inc <sales@openvpn.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
* plug-in support, using dynamically loaded libraries
*/
#ifndef OPENVPN_PLUGIN_H
#define OPENVPN_PLUGIN_H
#ifdef ENABLE_CRYPTO_OPENSSL
#include "ssl_verify_openssl.h"
#endif
#ifdef ENABLE_CRYPTO_MBEDTLS
#include "ssl_verify_mbedtls.h"
#endif
#include "openvpn-plugin.h"
#ifdef ENABLE_PLUGIN
#include "misc.h"
#define MAX_PLUGINS 16
struct plugin_option {
const char *so_pathname;
const char **argv;
};
struct plugin_option_list {
int n;
struct plugin_option plugins[MAX_PLUGINS];
};
struct plugin {
bool initialized;
const char *so_pathname;
unsigned int plugin_type_mask;
int requested_initialization_point;
#ifndef _WIN32
void *handle;
#else
HMODULE module;
#endif
openvpn_plugin_open_v1 open1;
openvpn_plugin_open_v2 open2;
openvpn_plugin_open_v3 open3;
openvpn_plugin_func_v1 func1;
openvpn_plugin_func_v2 func2;
openvpn_plugin_func_v3 func3;
openvpn_plugin_close_v1 close;
openvpn_plugin_abort_v1 abort;
openvpn_plugin_client_constructor_v1 client_constructor;
openvpn_plugin_client_destructor_v1 client_destructor;
openvpn_plugin_min_version_required_v1 min_version_required;
openvpn_plugin_select_initialization_point_v1 initialization_point;
openvpn_plugin_handle_t plugin_handle;
};
struct plugin_per_client
{
void *per_client_context[MAX_PLUGINS];
};
struct plugin_common
{
int n;
struct plugin plugins[MAX_PLUGINS];
};
struct plugin_list
{
struct plugin_per_client per_client;
struct plugin_common *common;
bool common_owned;
};
struct plugin_return
{
int n;
struct openvpn_plugin_string_list *list[MAX_PLUGINS];
};
struct plugin_option_list *plugin_option_list_new(struct gc_arena *gc);
bool plugin_option_list_add(struct plugin_option_list *list, char **p, struct gc_arena *gc);
#ifndef ENABLE_SMALL
void plugin_option_list_print(const struct plugin_option_list *list, int msglevel);
#endif
struct plugin_list *plugin_list_init(const struct plugin_option_list *list);
void plugin_list_open(struct plugin_list *pl,
const struct plugin_option_list *list,
struct plugin_return *pr,
const struct env_set *es,
const int init_point);
struct plugin_list *plugin_list_inherit(const struct plugin_list *src);
int plugin_call_ssl(const struct plugin_list *pl,
const int type,
const struct argv *av,
struct plugin_return *pr,
struct env_set *es
#ifdef ENABLE_CRYPTO
, int current_cert_depth,
openvpn_x509_cert_t *current_cert
#endif
);
void plugin_list_close(struct plugin_list *pl);
bool plugin_defined(const struct plugin_list *pl, const int type);
void plugin_return_get_column(const struct plugin_return *src,
struct plugin_return *dest,
const char *colname);
void plugin_return_free(struct plugin_return *pr);
#ifdef ENABLE_DEBUG
void plugin_return_print(const int msglevel, const char *prefix, const struct plugin_return *pr);
#endif
static inline int
plugin_n(const struct plugin_list *pl)
{
if (pl && pl->common)
{
return pl->common->n;
}
else
{
return 0;
}
}
static inline bool
plugin_return_defined(const struct plugin_return *pr)
{
return pr->n >= 0;
}
static inline void
plugin_return_init(struct plugin_return *pr)
{
pr->n = 0;
}
#else /* ifdef ENABLE_PLUGIN */
struct plugin_list { int dummy; };
struct plugin_return { int dummy; };
static inline bool
plugin_defined(const struct plugin_list *pl, const int type)
{
return false;
}
static inline int
plugin_call_ssl(const struct plugin_list *pl,
const int type,
const struct argv *av,
struct plugin_return *pr,
struct env_set *es
#ifdef ENABLE_CRYPTO
, int current_cert_depth,
openvpn_x509_cert_t *current_cert
#endif
)
{
return 0;
}
#endif /* ENABLE_PLUGIN */
static inline int
plugin_call(const struct plugin_list *pl,
const int type,
const struct argv *av,
struct plugin_return *pr,
struct env_set *es)
{
return plugin_call_ssl(pl, type, av, pr, es
#ifdef ENABLE_CRYPTO
, -1, NULL
#endif
);
}
#endif /* OPENVPN_PLUGIN_H */
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