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/*
* Copyright (C) 2006 Mike McCauley
* Copyright (C) 2010 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 "tnc_imc.h"
#include <dlfcn.h>
#include <debug.h>
#include <library.h>
typedef struct private_tnc_imc_t private_tnc_imc_t;
/**
* Private data of an imv_t object.
*/
struct private_tnc_imc_t {
/**
* Public members of imc_t.
*/
imc_t public;
/**
* Path of loaded IMC
*/
char *path;
/**
* Name of loaded IMC
*/
char *name;
/**
* Handle of loaded IMC
*/
void *handle;
/**
* ID of loaded IMC
*/
TNC_IMCID id;
/**
* List of message types supported by IMC
*/
TNC_MessageTypeList supported_types;
/**
* Number of supported message types
*/
TNC_UInt32 type_count;
};
METHOD(imc_t, set_id, void,
private_tnc_imc_t *this, TNC_IMCID id)
{
this->id = id;
}
METHOD(imc_t, get_id, TNC_IMCID,
private_tnc_imc_t *this)
{
return this->id;
}
METHOD(imc_t, get_name, char*,
private_tnc_imc_t *this)
{
return this->name;
}
METHOD(imc_t, set_message_types, void,
private_tnc_imc_t *this, TNC_MessageTypeList supported_types,
TNC_UInt32 type_count)
{
/* Free an existing MessageType list */
free(this->supported_types);
this->supported_types = NULL;
/* Store the new MessageType list */
this->type_count = type_count;
if (type_count && supported_types)
{
size_t size = type_count * sizeof(TNC_MessageType);
this->supported_types = malloc(size);
memcpy(this->supported_types, supported_types, size);
}
DBG2(DBG_TNC, "IMC %u supports %u message types", this->id, type_count);
}
METHOD(imc_t, type_supported, bool,
private_tnc_imc_t *this, TNC_MessageType message_type)
{
TNC_VendorID msg_vid, vid;
TNC_MessageSubtype msg_subtype, subtype;
int i;
msg_vid = (message_type >> 8) & TNC_VENDORID_ANY;
msg_subtype = message_type & TNC_SUBTYPE_ANY;
for (i = 0; i < this->type_count; i++)
{
vid = (this->supported_types[i] >> 8) & TNC_VENDORID_ANY;
subtype = this->supported_types[i] & TNC_SUBTYPE_ANY;
if (this->supported_types[i] == message_type
|| (subtype == TNC_SUBTYPE_ANY
&& (msg_vid == vid || vid == TNC_VENDORID_ANY))
|| (vid == TNC_VENDORID_ANY
&& (msg_subtype == subtype || subtype == TNC_SUBTYPE_ANY)))
{
return TRUE;
}
}
return FALSE;
}
METHOD(imc_t, destroy, void,
private_tnc_imc_t *this)
{
dlclose(this->handle);
free(this->supported_types);
free(this->name);
free(this->path);
free(this);
}
/**
* Described in header.
*/
imc_t* tnc_imc_create(char *name, char *path)
{
private_tnc_imc_t *this;
INIT(this,
.public = {
.set_id = _set_id,
.get_id = _get_id,
.get_name = _get_name,
.set_message_types = _set_message_types,
.type_supported = _type_supported,
.destroy = _destroy,
},
.name = name,
.path = path,
);
this->handle = dlopen(path, RTLD_LAZY);
if (!this->handle)
{
DBG1(DBG_TNC, "IMC \"%s\" failed to load: %s", name, dlerror());
free(this);
return NULL;
}
this->public.initialize = dlsym(this->handle, "TNC_IMC_Initialize");
if (!this->public.initialize)
{
DBG1(DBG_TNC, "could not resolve TNC_IMC_Initialize in %s: %s\n",
path, dlerror());
dlclose(this->handle);
free(this);
return NULL;
}
this->public.notify_connection_change =
dlsym(this->handle, "TNC_IMC_NotifyConnectionChange");
this->public.begin_handshake = dlsym(this->handle, "TNC_IMC_BeginHandshake");
if (!this->public.begin_handshake)
{
DBG1(DBG_TNC, "could not resolve TNC_IMC_BeginHandshake in %s: %s\n",
path, dlerror());
dlclose(this->handle);
free(this);
return NULL;
}
this->public.receive_message =
dlsym(this->handle, "TNC_IMC_ReceiveMessage");
this->public.batch_ending =
dlsym(this->handle, "TNC_IMC_BatchEnding");
this->public.terminate =
dlsym(this->handle, "TNC_IMC_Terminate");
this->public.provide_bind_function =
dlsym(this->handle, "TNC_IMC_ProvideBindFunction");
if (!this->public.provide_bind_function)
{
DBG1(DBG_TNC, "could not resolve TNC_IMC_ProvideBindFunction in %s: %s\n",
path, dlerror());
dlclose(this->handle);
free(this);
return NULL;
}
return &this->public;
}
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