277 lines
6.5 KiB
C
277 lines
6.5 KiB
C
/*
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* Copyright (C) 2012 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 "ietf_attr_attr_request.h"
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#include <pa_tnc/pa_tnc_msg.h>
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#include <bio/bio_writer.h>
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#include <bio/bio_reader.h>
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#include <collections/linked_list.h>
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#include <utils/debug.h>
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typedef struct private_ietf_attr_attr_request_t private_ietf_attr_attr_request_t;
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/**
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* PA-TNC Attribute Request type (see section 4.2.1 of RFC 5792)
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*
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* 1 2 3
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* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Reserved | PA-TNC Attribute Vendor ID |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | PA-TNC Attribute Type |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Reserved | PA-TNC Attribute Vendor ID |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | PA-TNC Attribute Type |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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#define ATTR_REQUEST_ENTRY_SIZE 8
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/**
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* Private data of an ietf_attr_attr_request_t object.
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*/
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struct private_ietf_attr_attr_request_t {
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/**
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* Public members of ietf_attr_attr_request_t
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*/
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ietf_attr_attr_request_t public;
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/**
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* Vendor-specific attribute type
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*/
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pen_type_t type;
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/**
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* Attribute value
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*/
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chunk_t value;
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/**
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* Noskip flag
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*/
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bool noskip_flag;
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/**
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* List of requested attribute types
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*/
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linked_list_t *list;
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/**
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* Reference count
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*/
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refcount_t ref;
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};
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METHOD(pa_tnc_attr_t, get_type, pen_type_t,
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private_ietf_attr_attr_request_t *this)
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{
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return this->type;
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}
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METHOD(pa_tnc_attr_t, get_value, chunk_t,
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private_ietf_attr_attr_request_t *this)
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{
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return this->value;
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}
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METHOD(pa_tnc_attr_t, get_noskip_flag, bool,
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private_ietf_attr_attr_request_t *this)
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{
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return this->noskip_flag;
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}
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METHOD(pa_tnc_attr_t, set_noskip_flag,void,
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private_ietf_attr_attr_request_t *this, bool noskip)
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{
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this->noskip_flag = noskip;
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}
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METHOD(pa_tnc_attr_t, build, void,
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private_ietf_attr_attr_request_t *this)
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{
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bio_writer_t *writer;
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enumerator_t *enumerator;
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pen_type_t *entry;
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if (this->value.ptr)
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{
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return;
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}
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writer = bio_writer_create(ATTR_REQUEST_ENTRY_SIZE *
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this->list->get_count(this->list));
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enumerator = this->list->create_enumerator(this->list);
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while (enumerator->enumerate(enumerator, &entry))
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{
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writer->write_uint32(writer, entry->vendor_id);
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writer->write_uint32(writer, entry->type);
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}
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enumerator->destroy(enumerator);
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this->value = writer->extract_buf(writer);
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writer->destroy(writer);
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}
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METHOD(ietf_attr_attr_request_t, add, void,
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private_ietf_attr_attr_request_t *this, pen_t vendor_id, u_int32_t type)
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{
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pen_type_t *entry;
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entry = malloc_thing(pen_type_t);
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entry->vendor_id = vendor_id;
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entry->type = type;
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this->list->insert_last(this->list, entry);
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}
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METHOD(pa_tnc_attr_t, process, status_t,
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private_ietf_attr_attr_request_t *this, u_int32_t *offset)
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{
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bio_reader_t *reader;
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enum_name_t *pa_attr_names;
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pen_t vendor_id;
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u_int32_t type;
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u_int8_t reserved;
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int count;
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count = this->value.len / ATTR_REQUEST_ENTRY_SIZE;
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if (this->value.len != ATTR_REQUEST_ENTRY_SIZE * count)
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{
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DBG1(DBG_TNC, "incorrect attribute length for IETF attribute request");
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*offset = 0;
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return FAILED;
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}
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reader = bio_reader_create(this->value);
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while (count--)
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{
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reader->read_uint8 (reader, &reserved);
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reader->read_uint24(reader, &vendor_id);
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reader->read_uint32(reader, &type);
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pa_attr_names = imcv_pa_tnc_attributes->get_names(imcv_pa_tnc_attributes,
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vendor_id);
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if (pa_attr_names)
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{
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DBG2(DBG_TNC, " 0x%06x/0x%08x '%N/%N'", vendor_id, type,
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pen_names, vendor_id, pa_attr_names, type);
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}
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else
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{
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DBG2(DBG_TNC, " 0x%06x/0x%08x '%N'", vendor_id, type,
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pen_names, vendor_id);
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}
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add(this, vendor_id, type);
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}
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reader->destroy(reader);
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return SUCCESS;
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}
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METHOD(pa_tnc_attr_t, get_ref, pa_tnc_attr_t*,
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private_ietf_attr_attr_request_t *this)
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{
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ref_get(&this->ref);
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return &this->public.pa_tnc_attribute;
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}
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METHOD(pa_tnc_attr_t, destroy, void,
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private_ietf_attr_attr_request_t *this)
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{
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if (ref_put(&this->ref))
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{
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this->list->destroy_function(this->list, free);
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free(this->value.ptr);
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free(this);
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}
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}
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METHOD(ietf_attr_attr_request_t, create_enumerator, enumerator_t*,
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private_ietf_attr_attr_request_t *this)
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{
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return this->list->create_enumerator(this->list);
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}
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/**
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* Described in header.
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*/
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pa_tnc_attr_t *ietf_attr_attr_request_create(pen_t vendor_id, u_int32_t type)
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{
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private_ietf_attr_attr_request_t *this;
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INIT(this,
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.public = {
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.pa_tnc_attribute = {
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.get_type = _get_type,
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.get_value = _get_value,
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.get_noskip_flag = _get_noskip_flag,
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.set_noskip_flag = _set_noskip_flag,
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.build = _build,
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.process = _process,
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.get_ref = _get_ref,
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.destroy = _destroy,
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},
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.add = _add,
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.create_enumerator = _create_enumerator,
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},
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.type = { PEN_IETF, IETF_ATTR_ATTRIBUTE_REQUEST },
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.list = linked_list_create(),
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.ref = 1,
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);
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if (vendor_id != PEN_RESERVED)
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{
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add(this, vendor_id, type);
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}
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return &this->public.pa_tnc_attribute;
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}
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/**
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* Described in header.
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*/
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pa_tnc_attr_t *ietf_attr_attr_request_create_from_data(chunk_t data)
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{
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private_ietf_attr_attr_request_t *this;
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INIT(this,
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.public = {
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.pa_tnc_attribute = {
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.get_type = _get_type,
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.get_value = _get_value,
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.get_noskip_flag = _get_noskip_flag,
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.set_noskip_flag = _set_noskip_flag,
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.build = _build,
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.process = _process,
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.get_ref = _get_ref,
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.destroy = _destroy,
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},
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.add = _add,
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.create_enumerator = _create_enumerator,
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},
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.type = { PEN_IETF, IETF_ATTR_ATTRIBUTE_REQUEST },
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.value = chunk_clone(data),
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.list = linked_list_create(),
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.ref = 1,
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);
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return &this->public.pa_tnc_attribute;
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}
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