595 lines
16 KiB
C
595 lines
16 KiB
C
/*
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* Copyright (C) 2011-2014 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 "imcv.h"
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#include "imc_agent.h"
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#include <tncif_names.h>
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#include <utils/debug.h>
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#include <threading/rwlock.h>
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typedef struct private_imc_agent_t private_imc_agent_t;
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/**
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* Private data of an imc_agent_t object.
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*/
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struct private_imc_agent_t {
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/**
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* Public members of imc_agent_t
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*/
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imc_agent_t public;
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/**
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* name of IMC
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*/
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const char *name;
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/**
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* message types registered by IMC
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*/
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pen_type_t *supported_types;
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/**
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* number of message types registered by IMC
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*/
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u_int32_t type_count;
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/**
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* ID of IMC as assigned by TNCC
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*/
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TNC_IMCID id;
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/**
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* List of additional IMC IDs assigned by TNCC
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*/
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linked_list_t *additional_ids;
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/**
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* list of non-fatal unsupported PA-TNC attribute types
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*/
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linked_list_t *non_fatal_attr_types;
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/**
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* list of TNCC connection entries
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*/
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linked_list_t *connections;
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/**
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* rwlock to lock TNCC connection entries
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*/
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rwlock_t *connection_lock;
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/**
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* Inform a TNCC about the set of message types the IMC is able to receive
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*
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* @param imc_id IMC ID assigned by TNCC
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* @param supported_types list of supported message types
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* @param type_count number of list elements
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* @return TNC result code
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*/
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TNC_Result (*report_message_types)(TNC_IMCID imc_id,
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TNC_MessageTypeList supported_types,
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TNC_UInt32 type_count);
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/**
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* Inform a TNCC about the set of message types the IMC is able to receive
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*
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* @param imc_id IMC ID assigned by TNCC
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* @param supported_vids list of supported message vendor IDs
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* @param supported_subtypes list of supported message subtypes
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* @param type_count number of list elements
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* @return TNC result code
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*/
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TNC_Result (*report_message_types_long)(TNC_IMCID imc_id,
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TNC_VendorIDList supported_vids,
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TNC_MessageSubtypeList supported_subtypes,
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TNC_UInt32 type_count);
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/**
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* Get the value of an attribute associated with a connection
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* or with the TNCC as a whole.
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*
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* @param imc_id IMC ID assigned by TNCC
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* @param connection_id network connection ID assigned by TNCC
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* @param attribute_id attribute ID
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* @param buffer_len length of buffer in bytes
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* @param buffer buffer
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* @param out_value_len size in bytes of attribute stored in buffer
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* @return TNC result code
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*/
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TNC_Result (*get_attribute)(TNC_IMCID imc_id,
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TNC_ConnectionID connection_id,
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TNC_AttributeID attribute_id,
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TNC_UInt32 buffer_len,
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TNC_BufferReference buffer,
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TNC_UInt32 *out_value_len);
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/**
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* Set the value of an attribute associated with a connection
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* or with the TNCC as a whole.
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*
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* @param imc_id IMV ID assigned by TNCC
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* @param connection_id network connection ID assigned by TNCC
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* @param attribute_id attribute ID
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* @param buffer_len length of buffer in bytes
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* @param buffer buffer
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* @return TNC result code
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*/
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TNC_Result (*set_attribute)(TNC_IMCID imc_id,
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TNC_ConnectionID connection_id,
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TNC_AttributeID attribute_id,
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TNC_UInt32 buffer_len,
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TNC_BufferReference buffer);
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/**
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* Reserve an additional IMC ID
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*
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* @param imc_id primary IMC ID assigned by TNCC
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* @param out_imc_id additional IMC ID assigned by TNCC
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* @return TNC result code
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*/
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TNC_Result (*reserve_additional_id)(TNC_IMCID imc_id,
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TNC_UInt32 *out_imc_id);
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};
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METHOD(imc_agent_t, bind_functions, TNC_Result,
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private_imc_agent_t *this, TNC_TNCC_BindFunctionPointer bind_function)
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{
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if (!bind_function)
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{
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DBG1(DBG_IMC, "TNC client failed to provide bind function");
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return TNC_RESULT_INVALID_PARAMETER;
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}
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if (bind_function(this->id, "TNC_TNCC_ReportMessageTypes",
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(void**)&this->report_message_types) != TNC_RESULT_SUCCESS)
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{
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this->report_message_types = NULL;
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}
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if (bind_function(this->id, "TNC_TNCC_ReportMessageTypesLong",
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(void**)&this->report_message_types_long) != TNC_RESULT_SUCCESS)
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{
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this->report_message_types_long = NULL;
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}
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if (bind_function(this->id, "TNC_TNCC_RequestHandshakeRetry",
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(void**)&this->public.request_handshake_retry) != TNC_RESULT_SUCCESS)
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{
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this->public.request_handshake_retry = NULL;
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}
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if (bind_function(this->id, "TNC_TNCC_SendMessage",
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(void**)&this->public.send_message) != TNC_RESULT_SUCCESS)
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{
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this->public.send_message = NULL;
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}
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if (bind_function(this->id, "TNC_TNCC_SendMessageLong",
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(void**)&this->public.send_message_long) != TNC_RESULT_SUCCESS)
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{
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this->public.send_message_long = NULL;
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}
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if (bind_function(this->id, "TNC_TNCC_GetAttribute",
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(void**)&this->get_attribute) != TNC_RESULT_SUCCESS)
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{
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this->get_attribute = NULL;
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}
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if (bind_function(this->id, "TNC_TNCC_SetAttribute",
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(void**)&this->set_attribute) != TNC_RESULT_SUCCESS)
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{
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this->set_attribute = NULL;
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}
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if (bind_function(this->id, "TNC_TNCC_ReserveAdditionalIMCID",
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(void**)&this->reserve_additional_id) != TNC_RESULT_SUCCESS)
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{
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this->reserve_additional_id = NULL;
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}
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if (this->report_message_types_long)
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{
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TNC_VendorIDList vendor_id_list;
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TNC_MessageSubtypeList subtype_list;
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int i;
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vendor_id_list = malloc(this->type_count * sizeof(TNC_UInt32));
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subtype_list = malloc(this->type_count * sizeof(TNC_UInt32));
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for (i = 0; i < this->type_count; i++)
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{
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vendor_id_list[i] = this->supported_types[i].vendor_id;
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subtype_list[i] = this->supported_types[i].type;
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}
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this->report_message_types_long(this->id, vendor_id_list, subtype_list,
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this->type_count);
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free(vendor_id_list);
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free(subtype_list);
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}
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else if (this->report_message_types)
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{
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TNC_MessageTypeList type_list;
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int i;
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type_list = malloc(this->type_count * sizeof(TNC_UInt32));
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for (i = 0; i < this->type_count; i++)
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{
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type_list[i] = (this->supported_types[i].vendor_id << 8) |
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(this->supported_types[i].type & 0xff);
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}
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this->report_message_types(this->id, type_list, this->type_count);
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free(type_list);
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}
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return TNC_RESULT_SUCCESS;
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}
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/**
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* finds a connection state based on its Connection ID
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*/
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static imc_state_t* find_connection(private_imc_agent_t *this,
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TNC_ConnectionID id)
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{
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enumerator_t *enumerator;
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imc_state_t *state, *found = NULL;
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this->connection_lock->read_lock(this->connection_lock);
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enumerator = this->connections->create_enumerator(this->connections);
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while (enumerator->enumerate(enumerator, &state))
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{
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if (id == state->get_connection_id(state))
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{
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found = state;
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break;
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}
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}
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enumerator->destroy(enumerator);
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this->connection_lock->unlock(this->connection_lock);
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return found;
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}
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/**
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* delete a connection state with a given Connection ID
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*/
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static bool delete_connection(private_imc_agent_t *this, TNC_ConnectionID id)
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{
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enumerator_t *enumerator;
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imc_state_t *state;
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bool found = FALSE;
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this->connection_lock->write_lock(this->connection_lock);
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enumerator = this->connections->create_enumerator(this->connections);
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while (enumerator->enumerate(enumerator, &state))
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{
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if (id == state->get_connection_id(state))
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{
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found = TRUE;
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state->destroy(state);
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this->connections->remove_at(this->connections, enumerator);
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break;
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}
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}
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enumerator->destroy(enumerator);
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this->connection_lock->unlock(this->connection_lock);
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return found;
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}
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/**
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* Read a boolean attribute
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*/
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static bool get_bool_attribute(private_imc_agent_t *this, TNC_ConnectionID id,
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TNC_AttributeID attribute_id)
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{
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TNC_UInt32 len;
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char buf[4];
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return this->get_attribute &&
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this->get_attribute(this->id, id, attribute_id, 4, buf, &len) ==
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TNC_RESULT_SUCCESS && len == 1 && *buf == 0x01;
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}
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/**
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* Read a string attribute
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*/
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static char* get_str_attribute(private_imc_agent_t *this, TNC_ConnectionID id,
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TNC_AttributeID attribute_id)
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{
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TNC_UInt32 len;
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char buf[BUF_LEN];
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if (this->get_attribute &&
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this->get_attribute(this->id, id, attribute_id, BUF_LEN, buf, &len) ==
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TNC_RESULT_SUCCESS && len <= BUF_LEN)
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{
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return strdup(buf);
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}
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return NULL;
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}
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/**
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* Read an UInt32 attribute
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*/
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static u_int32_t get_uint_attribute(private_imc_agent_t *this, TNC_ConnectionID id,
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TNC_AttributeID attribute_id)
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{
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TNC_UInt32 len;
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char buf[4];
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if (this->get_attribute &&
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this->get_attribute(this->id, id, attribute_id, 4, buf, &len) ==
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TNC_RESULT_SUCCESS && len == 4)
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{
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return untoh32(buf);
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}
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return 0;
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}
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METHOD(imc_agent_t, create_state, TNC_Result,
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private_imc_agent_t *this, imc_state_t *state)
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{
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TNC_ConnectionID conn_id;
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char *tnccs_p = NULL, *tnccs_v = NULL, *t_p = NULL, *t_v = NULL;
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bool has_long = FALSE, has_excl = FALSE, has_soh = FALSE;
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u_int32_t max_msg_len;
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conn_id = state->get_connection_id(state);
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if (find_connection(this, conn_id))
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{
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DBG1(DBG_IMC, "IMC %u \"%s\" already created a state for Connection ID %u",
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this->id, this->name, conn_id);
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state->destroy(state);
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return TNC_RESULT_OTHER;
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}
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/* Get and display attributes from TNCC via IF-IMC */
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has_long = get_bool_attribute(this, conn_id, TNC_ATTRIBUTEID_HAS_LONG_TYPES);
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has_excl = get_bool_attribute(this, conn_id, TNC_ATTRIBUTEID_HAS_EXCLUSIVE);
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has_soh = get_bool_attribute(this, conn_id, TNC_ATTRIBUTEID_HAS_SOH);
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tnccs_p = get_str_attribute(this, conn_id, TNC_ATTRIBUTEID_IFTNCCS_PROTOCOL);
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tnccs_v = get_str_attribute(this, conn_id, TNC_ATTRIBUTEID_IFTNCCS_VERSION);
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t_p = get_str_attribute(this, conn_id, TNC_ATTRIBUTEID_IFT_PROTOCOL);
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t_v = get_str_attribute(this, conn_id, TNC_ATTRIBUTEID_IFT_VERSION);
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max_msg_len = get_uint_attribute(this, conn_id, TNC_ATTRIBUTEID_MAX_MESSAGE_SIZE);
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state->set_flags(state, has_long, has_excl);
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state->set_max_msg_len(state, max_msg_len);
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DBG2(DBG_IMC, "IMC %u \"%s\" created a state for %s %s Connection ID %u: "
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"%slong %sexcl %ssoh", this->id, this->name,
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tnccs_p ? tnccs_p:"?", tnccs_v ? tnccs_v:"?", conn_id,
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has_long ? "+":"-", has_excl ? "+":"-", has_soh ? "+":"-");
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DBG2(DBG_IMC, " over %s %s with maximum PA-TNC message size of %u bytes",
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t_p ? t_p:"?", t_v ? t_v :"?", max_msg_len);
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free(tnccs_p);
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free(tnccs_v);
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free(t_p);
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free(t_v);
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this->connection_lock->write_lock(this->connection_lock);
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this->connections->insert_last(this->connections, state);
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this->connection_lock->unlock(this->connection_lock);
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return TNC_RESULT_SUCCESS;
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}
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METHOD(imc_agent_t, delete_state, TNC_Result,
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private_imc_agent_t *this, TNC_ConnectionID connection_id)
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{
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if (!delete_connection(this, connection_id))
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{
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DBG1(DBG_IMC, "IMC %u \"%s\" has no state for Connection ID %u",
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this->id, this->name, connection_id);
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return TNC_RESULT_FATAL;
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}
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DBG2(DBG_IMC, "IMC %u \"%s\" deleted the state of Connection ID %u",
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this->id, this->name, connection_id);
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return TNC_RESULT_SUCCESS;
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}
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METHOD(imc_agent_t, change_state, TNC_Result,
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private_imc_agent_t *this, TNC_ConnectionID connection_id,
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TNC_ConnectionState new_state,
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imc_state_t **state_p)
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{
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imc_state_t *state;
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switch (new_state)
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{
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case TNC_CONNECTION_STATE_HANDSHAKE:
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case TNC_CONNECTION_STATE_ACCESS_ALLOWED:
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case TNC_CONNECTION_STATE_ACCESS_ISOLATED:
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case TNC_CONNECTION_STATE_ACCESS_NONE:
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state = find_connection(this, connection_id);
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if (!state)
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{
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DBG1(DBG_IMC, "IMC %u \"%s\" has no state for Connection ID %u",
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this->id, this->name, connection_id);
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return TNC_RESULT_FATAL;
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}
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state->change_state(state, new_state);
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DBG2(DBG_IMC, "IMC %u \"%s\" changed state of Connection ID %u to '%N'",
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this->id, this->name, connection_id,
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TNC_Connection_State_names, new_state);
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if (state_p)
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{
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*state_p = state;
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}
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break;
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case TNC_CONNECTION_STATE_CREATE:
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DBG1(DBG_IMC, "state '%N' should be handled by create_state()",
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TNC_Connection_State_names, new_state);
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return TNC_RESULT_FATAL;
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case TNC_CONNECTION_STATE_DELETE:
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DBG1(DBG_IMC, "state '%N' should be handled by delete_state()",
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TNC_Connection_State_names, new_state);
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return TNC_RESULT_FATAL;
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default:
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DBG1(DBG_IMC, "IMC %u \"%s\" was notified of unknown state %u "
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"for Connection ID %u",
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this->id, this->name, new_state, connection_id);
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return TNC_RESULT_INVALID_PARAMETER;
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}
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return TNC_RESULT_SUCCESS;
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}
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METHOD(imc_agent_t, get_state, bool,
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private_imc_agent_t *this, TNC_ConnectionID connection_id,
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imc_state_t **state)
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{
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*state = find_connection(this, connection_id);
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if (!*state)
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{
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DBG1(DBG_IMC, "IMC %u \"%s\" has no state for Connection ID %u",
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this->id, this->name, connection_id);
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return FALSE;
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}
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return TRUE;
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}
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METHOD(imc_agent_t, get_name, const char*,
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private_imc_agent_t *this)
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{
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return this->name;
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}
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METHOD(imc_agent_t, get_id, TNC_IMCID,
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private_imc_agent_t *this)
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{
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return this->id;
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}
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METHOD(imc_agent_t, reserve_additional_ids, TNC_Result,
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private_imc_agent_t *this, int count)
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{
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TNC_Result result;
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TNC_UInt32 id;
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void *pointer;
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if (!this->reserve_additional_id)
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{
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DBG1(DBG_IMC, "IMC %u \"%s\" did not detect the capability to reserve "
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"additional IMC IDs from the TNCC", this->id, this->name);
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return TNC_RESULT_ILLEGAL_OPERATION;
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}
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while (count > 0)
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{
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result = this->reserve_additional_id(this->id, &id);
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if (result != TNC_RESULT_SUCCESS)
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{
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DBG1(DBG_IMC, "IMC %u \"%s\" failed to reserve %d additional IMC IDs",
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this->id, this->name, count);
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return result;
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}
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count--;
|
|
|
|
/* store the scalar value in the pointer */
|
|
pointer = (void*)(uintptr_t)id;
|
|
this->additional_ids->insert_last(this->additional_ids, pointer);
|
|
DBG2(DBG_IMC, "IMC %u \"%s\" reserved additional ID %u",
|
|
this->id, this->name, id);
|
|
}
|
|
return TNC_RESULT_SUCCESS;
|
|
}
|
|
|
|
METHOD(imc_agent_t, count_additional_ids, int,
|
|
private_imc_agent_t *this)
|
|
{
|
|
return this->additional_ids->get_count(this->additional_ids);
|
|
}
|
|
|
|
METHOD(imc_agent_t, create_id_enumerator, enumerator_t*,
|
|
private_imc_agent_t *this)
|
|
{
|
|
return this->additional_ids->create_enumerator(this->additional_ids);
|
|
}
|
|
|
|
METHOD(imc_agent_t, add_non_fatal_attr_type, void,
|
|
private_imc_agent_t *this, pen_type_t type)
|
|
{
|
|
pen_type_t *type_p;
|
|
|
|
type_p = malloc_thing(pen_type_t);
|
|
*type_p = type;
|
|
this->non_fatal_attr_types->insert_last(this->non_fatal_attr_types, type_p);
|
|
}
|
|
|
|
METHOD(imc_agent_t, get_non_fatal_attr_types, linked_list_t*,
|
|
private_imc_agent_t *this)
|
|
{
|
|
return this->non_fatal_attr_types;
|
|
}
|
|
|
|
METHOD(imc_agent_t, destroy, void,
|
|
private_imc_agent_t *this)
|
|
{
|
|
DBG1(DBG_IMC, "IMC %u \"%s\" terminated", this->id, this->name);
|
|
this->additional_ids->destroy(this->additional_ids);
|
|
this->non_fatal_attr_types->destroy_function(this->non_fatal_attr_types,
|
|
free);
|
|
this->connections->destroy_function(this->connections, free);
|
|
this->connection_lock->destroy(this->connection_lock);
|
|
free(this);
|
|
|
|
/* decrease the reference count or terminate */
|
|
libimcv_deinit();
|
|
}
|
|
|
|
/**
|
|
* Described in header.
|
|
*/
|
|
imc_agent_t *imc_agent_create(const char *name,
|
|
pen_type_t *supported_types, u_int32_t type_count,
|
|
TNC_IMCID id, TNC_Version *actual_version)
|
|
{
|
|
private_imc_agent_t *this;
|
|
|
|
/* initialize or increase the reference count */
|
|
if (!libimcv_init(FALSE))
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
INIT(this,
|
|
.public = {
|
|
.bind_functions = _bind_functions,
|
|
.create_state = _create_state,
|
|
.delete_state = _delete_state,
|
|
.change_state = _change_state,
|
|
.get_state = _get_state,
|
|
.get_name = _get_name,
|
|
.get_id = _get_id,
|
|
.reserve_additional_ids = _reserve_additional_ids,
|
|
.count_additional_ids = _count_additional_ids,
|
|
.create_id_enumerator = _create_id_enumerator,
|
|
.add_non_fatal_attr_type = _add_non_fatal_attr_type,
|
|
.get_non_fatal_attr_types = _get_non_fatal_attr_types,
|
|
.destroy = _destroy,
|
|
},
|
|
.name = name,
|
|
.supported_types = supported_types,
|
|
.type_count = type_count,
|
|
.id = id,
|
|
.additional_ids = linked_list_create(),
|
|
.non_fatal_attr_types = linked_list_create(),
|
|
.connections = linked_list_create(),
|
|
.connection_lock = rwlock_create(RWLOCK_TYPE_DEFAULT),
|
|
);
|
|
|
|
*actual_version = TNC_IFIMC_VERSION_1;
|
|
DBG1(DBG_IMC, "IMC %u \"%s\" initialized", this->id, this->name);
|
|
|
|
return &this->public;
|
|
}
|