implemented dynamic detection of TNCCS protocol
This commit is contained in:
Andreas Steffen
@@ -0,0 +1,17 @@
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INCLUDES = -I$(top_srcdir)/src/libstrongswan -I$(top_srcdir)/src/libhydra \
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-I$(top_srcdir)/src/libcharon -I$(top_srcdir)/src/libtls
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AM_CFLAGS = -rdynamic
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if MONOLITHIC
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noinst_LTLIBRARIES = libstrongswan-tnccs-dynamic.la
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else
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plugin_LTLIBRARIES = libstrongswan-tnccs-dynamic.la
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libstrongswan_tnccs_dynamic_la_LIBADD = $(top_builddir)/src/libtls/libtls.la
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endif
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libstrongswan_tnccs_dynamic_la_SOURCES = \
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tnccs_dynamic_plugin.h tnccs_dynamic_plugin.c tnccs_dynamic.h tnccs_dynamic.c
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libstrongswan_tnccs_dynamic_la_LDFLAGS = -module -avoid-version
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@@ -0,0 +1,140 @@
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/*
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* Copyright (C) 2011 Andreas Steffen
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* HSR Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "tnccs_dynamic.h"
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#include <tnc/tnccs/tnccs.h>
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#include <daemon.h>
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typedef struct private_tnccs_dynamic_t private_tnccs_dynamic_t;
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/**
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* Private data of a tnccs_dynamic_t object.
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*/
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struct private_tnccs_dynamic_t {
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/**
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* Public tls_t interface.
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*/
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tls_t public;
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/**
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* Detected TNC IF-TNCCS stack
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*/
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tls_t *tls;
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};
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tnccs_type_t determine_tnccs_protocol(char version)
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{
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switch (version)
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{
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case '\t':
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case '\n':
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case '\r':
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case ' ':
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case '<':
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return TNCCS_1_1;
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case 0x00:
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return TNCCS_SOH;
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case 0x02:
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return TNCCS_2_0;
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default:
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return TNCCS_UNKNOWN;
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}
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}
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METHOD(tls_t, process, status_t,
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private_tnccs_dynamic_t *this, void *buf, size_t buflen)
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{
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tnccs_type_t type;
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if (!this->tls)
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{
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if (buflen == 0)
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{
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return FAILED;
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}
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type = determine_tnccs_protocol(*(char*)buf);
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DBG1(DBG_TNC, "%N protocol detected dynamically",
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tnccs_type_names, type);
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this->tls = (tls_t*)charon->tnccs->create_instance(charon->tnccs,
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type, TRUE);
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if (!this->tls)
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{
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DBG1(DBG_TNC, "N% protocol not supported", tnccs_type_names, type);
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return FAILED;
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}
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}
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return this->tls->process(this->tls, buf, buflen);
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}
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METHOD(tls_t, build, status_t,
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private_tnccs_dynamic_t *this, void *buf, size_t *buflen, size_t *msglen)
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{
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return this->tls->build(this->tls, buf, buflen, msglen);
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}
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METHOD(tls_t, is_server, bool,
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private_tnccs_dynamic_t *this)
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{
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return TRUE;
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}
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METHOD(tls_t, get_purpose, tls_purpose_t,
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private_tnccs_dynamic_t *this)
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{
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return TLS_PURPOSE_EAP_TNC;
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}
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METHOD(tls_t, is_complete, bool,
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private_tnccs_dynamic_t *this)
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{
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return this->tls ? this->tls->is_complete(this->tls) : FALSE;
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}
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METHOD(tls_t, get_eap_msk, chunk_t,
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private_tnccs_dynamic_t *this)
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{
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return chunk_empty;
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}
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METHOD(tls_t, destroy, void,
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private_tnccs_dynamic_t *this)
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{
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DESTROY_IF(this->tls);
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free(this);
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}
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/**
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* See header
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*/
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tls_t *tnccs_dynamic_create(bool is_server)
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{
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private_tnccs_dynamic_t *this;
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INIT(this,
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.public = {
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.process = _process,
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.build = _build,
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.is_server = _is_server,
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.get_purpose = _get_purpose,
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.is_complete = _is_complete,
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.get_eap_msk = _get_eap_msk,
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.destroy = _destroy,
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},
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);
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return &this->public;
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}
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@@ -0,0 +1,36 @@
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/*
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* Copyright (C) 2011 Andreas Steffen
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* HSR Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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/**
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* @defgroup tnccs_dynamic_h tnccs_dynamic
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* @{ @ingroup tnccs_dynamic
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*/
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#ifndef TNCCS_DYNAMIC_H_
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#define TNCCS_DYNAMIC_H_
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#include <library.h>
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#include <tls.h>
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/**
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* Create an instance of a dynamic TNC IF-TNCCS protocol handler.
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*
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* @param is_server TRUE to act as TNC Server, FALSE for TNC Client
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* @return dynamic TNC IF-TNCCS protocol stack
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*/
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tls_t *tnccs_dynamic_create(bool is_server);
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#endif /** TNCCS_DYNAMIC_H_ @}*/
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@@ -0,0 +1,47 @@
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/*
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* Copyright (C) 2011 Andreas Steffen
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* HSR Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "tnccs_dynamic_plugin.h"
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#include "tnccs_dynamic.h"
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#include <daemon.h>
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METHOD(plugin_t, destroy, void,
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tnccs_dynamic_plugin_t *this)
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{
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charon->tnccs->remove_method(charon->tnccs,
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(tnccs_constructor_t)tnccs_dynamic_create);
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free(this);
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}
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/*
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* see header file
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*/
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plugin_t *tnccs_dynamic_plugin_create()
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{
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tnccs_dynamic_plugin_t *this;
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INIT(this,
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.plugin = {
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.destroy = _destroy,
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},
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);
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charon->tnccs->add_method(charon->tnccs, TNCCS_DYNAMIC,
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(tnccs_constructor_t)tnccs_dynamic_create);
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return &this->plugin;
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}
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@@ -0,0 +1,42 @@
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/*
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* Copyright (C) 2011 Andreas Steffen
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* HSR Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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/**
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* @defgroup tnccs_dynamic tnccs_dynamic
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* @ingroup cplugins
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*
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* @defgroup tnccs_dynamic_plugin tnccs_dynamic_plugin
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* @{ @ingroup tnccs_dynamic
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*/
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#ifndef TNCCS_DYNAMIC_PLUGIN_H_
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#define TNCCS_DYNAMIC_PLUGIN_H_
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#include <plugins/plugin.h>
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typedef struct tnccs_dynamic_plugin_t tnccs_dynamic_plugin_t;
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/**
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* EAP-TNC plugin
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*/
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struct tnccs_dynamic_plugin_t {
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/**
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* implements plugin interface
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*/
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plugin_t plugin;
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};
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#endif /** TNCCS_DYNAMIC_PLUGIN_H_ @}*/
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