[thirdparty/strongswan.git] / src / libimcv / ietf / swima / ietf_swima_attr_sw_ev.c

/*
 * Copyright (C) 2017 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 "ietf_swima_attr_sw_ev.h"
#include "swima/swima_event.h"

#include <pa_tnc/pa_tnc_msg.h>
#include <bio/bio_writer.h>
#include <bio/bio_reader.h>
#include <utils/debug.h>

#define SW_EV_TIMESTAMP_SIZE	20

typedef struct private_ietf_swima_attr_sw_ev_t private_ietf_swima_attr_sw_ev_t;

/**
 * Software [Identifier] Events
 * see sections 5.9/5.11 of RFC 8412 SWIMA
 *
 *                       1                   2                   3
 *   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
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |     Flags     |           Software Identifier Count           |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |               Request ID Copy / Subscription ID               |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |                           EID Epoch                           |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |                           Last EID                            |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |                       Last Consulted EID                      |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |                              EID                              |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |                           Timestamp                           |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |                           Timestamp                           |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |                           Timestamp                           |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |                           Timestamp                           |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |                           Timestamp                           |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |                       Record Identifier                       |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |              Data Model Type PEN              |Data Model Type|
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  | Source ID Num |    Action     |  Software Identifier Length   |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |             Software Identifier (Variable Length)             |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |    Software Locator Length    |  Software Locator (Var. Len)  |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *
 * Software Event only
 * see section 5.11 of IETF SW Inventory Message and Attributes for PA-TNC
 *
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |                          Record Length                        |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |                   Record (Variable length)                    |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 */

/**
 * Private data of an ietf_swima_attr_sw_ev_t object.
 */
struct private_ietf_swima_attr_sw_ev_t {

	/**
	 * Public members of ietf_swima_attr_sw_ev_t
	 */
	ietf_swima_attr_sw_ev_t public;

	/**
	 * Vendor-specific attribute type
	 */
	pen_type_t type;

	/**
	 * Length of attribute value
	 */
	size_t length;

	/**
	 * Offset up to which attribute value has been processed
	 */
	size_t offset;

	/**
	 * Current position of attribute value pointer
	 */
	chunk_t value;

	/**
	 * Contains complete attribute or current segment
	 */
	chunk_t segment;

	/**
	 * Noskip flag
	 */
	bool noskip_flag;

	/**
	 * Request ID
	 */
	uint32_t request_id;

	/**
	 * Attribute flags
	 */
	uint8_t flags;

	/**
	 * Number of unprocessed software events in attribute
	 */
	uint32_t event_count;

	/**
	 * Event list
	 */
	swima_events_t *events;

	/**
	 * Reference count
	 */
	refcount_t ref;
};

METHOD(pa_tnc_attr_t, get_type, pen_type_t,
	private_ietf_swima_attr_sw_ev_t *this)
{
	return this->type;
}

METHOD(pa_tnc_attr_t, get_value, chunk_t,
	private_ietf_swima_attr_sw_ev_t *this)
{
	return this->value;
}

METHOD(pa_tnc_attr_t, get_noskip_flag, bool,
	private_ietf_swima_attr_sw_ev_t *this)
{
	return this->noskip_flag;
}

METHOD(pa_tnc_attr_t, set_noskip_flag,void,
	private_ietf_swima_attr_sw_ev_t *this, bool noskip)
{
	this->noskip_flag = noskip;
}

/**
 * This function is shared with ietf_swima_attr_sw_inv.c
 **/
void ietf_swima_attr_sw_ev_build_sw_record(bio_writer_t *writer,
		uint8_t action, swima_record_t *sw_record, bool has_record)
{
	pen_type_t data_model;
	chunk_t sw_locator;

	data_model = sw_record->get_data_model(sw_record);

	writer->write_uint32(writer, sw_record->get_record_id(sw_record));
	writer->write_uint24(writer, data_model.vendor_id);
	writer->write_uint8 (writer, data_model.type);
	writer->write_uint8 (writer, sw_record->get_source_id(sw_record));
	writer->write_uint8 (writer, action);
	writer->write_data16(writer, sw_record->get_sw_id(sw_record, &sw_locator));
	writer->write_data16(writer, sw_locator);

	if (has_record)
	{
		writer->write_data32(writer, sw_record->get_record(sw_record));
	}
}

METHOD(pa_tnc_attr_t, build, void,
	private_ietf_swima_attr_sw_ev_t *this)
{
	bio_writer_t *writer;
	swima_event_t *sw_event;
	swima_record_t *sw_record;
	chunk_t timestamp;
	uint32_t last_eid, last_consulted_eid, eid_epoch;
	uint8_t action;
	enumerator_t *enumerator;

	if (this->value.ptr)
	{
		return;
	}
	last_consulted_eid = this->events->get_eid(this->events, &eid_epoch,
															 &last_eid);

	writer = bio_writer_create(IETF_SWIMA_SW_EV_MIN_SIZE);
	writer->write_uint8 (writer, this->flags);
	writer->write_uint24(writer, this->events->get_count(this->events));
	writer->write_uint32(writer, this->request_id);
	writer->write_uint32(writer, eid_epoch);
	writer->write_uint32(writer, last_eid);
	writer->write_uint32(writer, last_consulted_eid);

	enumerator = this->events->create_enumerator(this->events);
	while (enumerator->enumerate(enumerator, &sw_event))
	{
		action     = sw_event->get_action(sw_event);
		sw_record  = sw_event->get_sw_record(sw_event);

		writer->write_uint32(writer, sw_event->get_eid(sw_event, &timestamp));
		writer->write_data  (writer, timestamp);

		ietf_swima_attr_sw_ev_build_sw_record(writer, action, sw_record,
								this->type.type == IETF_ATTR_SW_EVENTS);
	}
	enumerator->destroy(enumerator);

	this->value = writer->extract_buf(writer);
	this->segment = this->value;
	this->length = this->value.len;
	writer->destroy(writer);
}

/**
 * This function is shared with ietf_swima_attr_sw_inv.c
 **/
bool ietf_swima_attr_sw_ev_process_sw_record(bio_reader_t *reader,
		uint8_t *action, swima_record_t **sw_record, bool has_record)
{
	pen_type_t data_model;
	swima_record_t *sw_rec;
	uint32_t data_model_pen, record_id;
	uint8_t  data_model_type, source_id, reserved;
	chunk_t sw_id, sw_locator, record = chunk_empty;

	if (!reader->read_uint32(reader, &record_id) ||
		!reader->read_uint24(reader, &data_model_pen) ||
		!reader->read_uint8 (reader, &data_model_type) ||
		!reader->read_uint8 (reader, &source_id) ||
		!reader->read_uint8 (reader, &reserved) ||
		!reader->read_data16(reader, &sw_id) ||
		!reader->read_data16(reader, &sw_locator))
	{
		return FALSE;
	}

	if (action)
	{
		*action = reserved;
	}

	if (has_record && !reader->read_data32(reader, &record))
	{
		return FALSE;
	}

	data_model = pen_type_create(data_model_pen, data_model_type);
	sw_rec = swima_record_create(record_id, sw_id, sw_locator);
	sw_rec->set_data_model(sw_rec, data_model);
	sw_rec->set_source_id(sw_rec, source_id);
	sw_rec->set_record(sw_rec, record);
	*sw_record = sw_rec;

	return TRUE;
}

METHOD(pa_tnc_attr_t, process, status_t,
	private_ietf_swima_attr_sw_ev_t *this, uint32_t *offset)
{
	bio_reader_t *reader;
	uint32_t eid, eid_epoch, last_eid, last_consulted_eid;
	uint8_t  action;
	chunk_t timestamp;
	swima_event_t *sw_event;
	swima_record_t *sw_record;
	status_t status = NEED_MORE;

	if (this->offset == 0)
	{
		if (this->length < IETF_SWIMA_SW_EV_MIN_SIZE)
		{
			DBG1(DBG_TNC, "insufficient data for %N/%N", pen_names, PEN_IETF,
						   ietf_attr_names, this->type.type);
			*offset = this->offset;
			return FAILED;
		}
		if (this->value.len < IETF_SWIMA_SW_EV_MIN_SIZE)
		{
			return NEED_MORE;
		}
		reader = bio_reader_create(this->value);
		reader->read_uint8 (reader, &this->flags);
		reader->read_uint24(reader, &this->event_count);
		reader->read_uint32(reader, &this->request_id);
		reader->read_uint32(reader, &eid_epoch);
		reader->read_uint32(reader, &last_eid);
		reader->read_uint32(reader, &last_consulted_eid);
		this->offset = IETF_SWIMA_SW_EV_MIN_SIZE;
		this->events->set_eid(this->events, last_consulted_eid, eid_epoch);
		this->events->set_last_eid(this->events, last_eid);
		this->value = reader->peek(reader);
		reader->destroy(reader);
	}

	reader = bio_reader_create(this->value);

	while (this->event_count)
	{
		if (!reader->read_uint32(reader, &eid) ||
			!reader->read_data  (reader, SW_EV_TIMESTAMP_SIZE, &timestamp) ||
			!ietf_swima_attr_sw_ev_process_sw_record(reader, &action, &sw_record,
								this->type.type == IETF_ATTR_SW_EVENTS))
		{
			goto end;
		}

		if (action == SWIMA_EVENT_ACTION_NONE ||
			action  > SWIMA_EVENT_ACTION_LAST)
		{
			DBG1(DBG_TNC, "invalid event action value for %N/%N", pen_names,
						   PEN_IETF, ietf_attr_names, this->type.type);
			*offset = this->offset;
			sw_record->destroy(sw_record);
			reader->destroy(reader);

			return FAILED;
		}

		sw_event = swima_event_create(eid, timestamp, action, sw_record);
		this->events->add(this->events, sw_event);
		this->offset += this->value.len - reader->remaining(reader);
		this->value = reader->peek(reader);

		/* at least one software event was processed */
		status = SUCCESS;
		this->event_count--;
	}

	if (this->length == this->offset)
	{
		status = SUCCESS;
	}
	else
	{
		DBG1(DBG_TNC, "inconsistent length for %N/%N", pen_names, PEN_IETF,
					   ietf_attr_names, this->type.type);
		*offset = this->offset;
		status = FAILED;
	}

end:
	reader->destroy(reader);
	return status;
}

METHOD(pa_tnc_attr_t, add_segment, void,
	private_ietf_swima_attr_sw_ev_t *this, chunk_t segment)
{
	this->value = chunk_cat("cc", this->value, segment);
	chunk_free(&this->segment);
	this->segment = this->value;
}

METHOD(pa_tnc_attr_t, get_ref, pa_tnc_attr_t*,
	private_ietf_swima_attr_sw_ev_t *this)
{
	ref_get(&this->ref);
	return &this->public.pa_tnc_attribute;
}

METHOD(pa_tnc_attr_t, destroy, void,
	private_ietf_swima_attr_sw_ev_t *this)
{
	if (ref_put(&this->ref))
	{
		this->events->destroy(this->events);
		free(this->segment.ptr);
		free(this);
	}
}

METHOD(ietf_swima_attr_sw_ev_t, get_flags, uint8_t,
	private_ietf_swima_attr_sw_ev_t *this)
{
	return this->flags;
}

METHOD(ietf_swima_attr_sw_ev_t, get_request_id, uint32_t,
	private_ietf_swima_attr_sw_ev_t *this)
{
	return this->request_id;
}

METHOD(ietf_swima_attr_sw_ev_t, get_event_count, uint32_t,
	private_ietf_swima_attr_sw_ev_t *this)
{
	return this->event_count;
}

METHOD(ietf_swima_attr_sw_ev_t, set_events, void,
	private_ietf_swima_attr_sw_ev_t *this, swima_events_t *events)
{
	this->events->destroy(this->events);
	this->events = events->get_ref(events);
}

METHOD(ietf_swima_attr_sw_ev_t, get_events, swima_events_t*,
	private_ietf_swima_attr_sw_ev_t *this)
{
	return this->events;
}

METHOD(ietf_swima_attr_sw_ev_t, clear_events, void,
	private_ietf_swima_attr_sw_ev_t *this)
{
	this->events->clear(this->events);
}

/**
 * Described in header.
 */
pa_tnc_attr_t *ietf_swima_attr_sw_ev_create(uint8_t flags, uint32_t request_id,
											 bool sw_id_only)
{
	private_ietf_swima_attr_sw_ev_t *this;
	ietf_attr_t type;

	type = sw_id_only ? IETF_ATTR_SW_ID_EVENTS : IETF_ATTR_SW_EVENTS;

	INIT(this,
		.public = {
			.pa_tnc_attribute = {
				.get_type = _get_type,
				.get_value = _get_value,
				.get_noskip_flag = _get_noskip_flag,
				.set_noskip_flag = _set_noskip_flag,
				.build = _build,
				.process = _process,
				.add_segment = _add_segment,
				.get_ref = _get_ref,
				.destroy = _destroy,
			},
			.get_flags = _get_flags,
			.get_request_id = _get_request_id,
			.get_event_count = _get_event_count,
			.set_events = _set_events,
			.get_events = _get_events,
			.clear_events = _clear_events,
		},
		.type = { PEN_IETF, type },
		.flags = flags,
		.request_id = request_id,
		.events = swima_events_create(),
		.ref = 1,
	);

	return &this->public.pa_tnc_attribute;
}


/**
 * Described in header.
 */
pa_tnc_attr_t *ietf_swima_attr_sw_ev_create_from_data(size_t length,
										chunk_t data, bool sw_id_only)
{
	private_ietf_swima_attr_sw_ev_t *this;
	ietf_attr_t type;

	type = sw_id_only ? IETF_ATTR_SW_ID_EVENTS : IETF_ATTR_SW_EVENTS;

	INIT(this,
		.public = {
			.pa_tnc_attribute = {
				.get_type = _get_type,
				.get_value = _get_value,
				.get_noskip_flag = _get_noskip_flag,
				.set_noskip_flag = _set_noskip_flag,
				.build = _build,
				.process = _process,
				.add_segment = _add_segment,
				.get_ref = _get_ref,
				.destroy = _destroy,
			},
			.get_flags = _get_flags,
			.get_request_id = _get_request_id,
			.get_event_count = _get_event_count,
			.set_events = _set_events,
			.get_events = _get_events,
			.clear_events = _clear_events,
		},
		.type = { PEN_IETF, type },
		.length = length,
		.segment = chunk_clone(data),
		.events = swima_events_create(),
		.ref = 1,
	);

	/* received either complete attribute value or first segment */
	this->value = this->segment;

	return &this->public.pa_tnc_attribute;
}
Commit	Line	Data
84c0366b AS	1	/*
	2	* Copyright (C) 2017 Andreas Steffen
	3	* HSR Hochschule fuer Technik Rapperswil
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms of the GNU General Public License as published by the
	7	* Free Software Foundation; either version 2 of the License, or (at your
	8	* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
	9	*
	10	* This program is distributed in the hope that it will be useful, but
	11	* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
	12	* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	13	* for more details.
	14	*/
	15
	16	#include "ietf_swima_attr_sw_ev.h"
	17	#include "swima/swima_event.h"
	18
	19	#include <pa_tnc/pa_tnc_msg.h>
	20	#include <bio/bio_writer.h>
	21	#include <bio/bio_reader.h>
	22	#include <utils/debug.h>
	23
	24	#define SW_EV_TIMESTAMP_SIZE 20
	25
	26	typedef struct private_ietf_swima_attr_sw_ev_t private_ietf_swima_attr_sw_ev_t;
	27
	28	/**
	29	* Software [Identifier] Events
2a26566e	30	* see sections 5.9/5.11 of RFC 8412 SWIMA
84c0366b AS	31	*
	32	* 1 2 3
	33	* 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
	34	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	35	* \| Flags \| Software Identifier Count \|
	36	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	37	* \| Request ID Copy / Subscription ID \|
	38	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	39	* \| EID Epoch \|
	40	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	41	* \| Last EID \|
	42	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	43	* \| Last Consulted EID \|
	44	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	45	* \| EID \|
	46	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	47	* \| Timestamp \|
	48	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	49	* \| Timestamp \|
	50	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	51	* \| Timestamp \|
	52	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	53	* \| Timestamp \|
	54	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	55	* \| Timestamp \|
	56	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	57	* \| Record Identifier \|
	58	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	59	* \| Data Model Type PEN \|Data Model Type\|
	60	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	61	* \| Source ID Num \| Action \| Software Identifier Length \|
	62	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	63	* \| Software Identifier (Variable Length) \|
	64	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	65	* \| Software Locator Length \| Software Locator (Var. Len) \|
	66	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	67	*
	68	* Software Event only
	69	* see section 5.11 of IETF SW Inventory Message and Attributes for PA-TNC
	70	*
	71	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	72	* \| Record Length \|
	73	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	74	* \| Record (Variable length) \|
	75	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	76	*/
	77
	78	/**
	79	* Private data of an ietf_swima_attr_sw_ev_t object.
	80	*/
	81	struct private_ietf_swima_attr_sw_ev_t {
	82
	83	/**
	84	* Public members of ietf_swima_attr_sw_ev_t
	85	*/
	86	ietf_swima_attr_sw_ev_t public;
	87
	88	/**
	89	* Vendor-specific attribute type
	90	*/
	91	pen_type_t type;
	92
	93	/**
	94	* Length of attribute value
95	*/
96	size_t length;
97
98	/**
99	* Offset up to which attribute value has been processed
100	*/
101	size_t offset;
102
103	/**
104	* Current position of attribute value pointer
105	*/
106	chunk_t value;
107
108	/**
109	* Contains complete attribute or current segment
110	*/
111	chunk_t segment;
112
113	/**
114	* Noskip flag
115	*/
116	bool noskip_flag;
117
118	/**
119	* Request ID
120	*/
121	uint32_t request_id;
122
123	/**
124	* Attribute flags
125	*/
126	uint8_t flags;
127
128	/**
129	* Number of unprocessed software events in attribute
130	*/
131	uint32_t event_count;
132
133	/**
134	* Event list
135	*/
136	swima_events_t *events;
137
138	/**
139	* Reference count
140	*/
141	refcount_t ref;
142	};
143
144	METHOD(pa_tnc_attr_t, get_type, pen_type_t,
145	private_ietf_swima_attr_sw_ev_t *this)
146	{
147	return this->type;
148	}
149
150	METHOD(pa_tnc_attr_t, get_value, chunk_t,
151	private_ietf_swima_attr_sw_ev_t *this)
152	{
153	return this->value;
154	}
155
156	METHOD(pa_tnc_attr_t, get_noskip_flag, bool,
157	private_ietf_swima_attr_sw_ev_t *this)
158	{
159	return this->noskip_flag;
160	}
161
162	METHOD(pa_tnc_attr_t, set_noskip_flag,void,
163	private_ietf_swima_attr_sw_ev_t *this, bool noskip)
164	{
165	this->noskip_flag = noskip;
166	}
167
27ec213d AS	168	/**
	169	* This function is shared with ietf_swima_attr_sw_inv.c
	170	**/
	171	void ietf_swima_attr_sw_ev_build_sw_record(bio_writer_t *writer,
	172	uint8_t action, swima_record_t *sw_record, bool has_record)
	173	{
	174	pen_type_t data_model;
	175	chunk_t sw_locator;
	176
	177	data_model = sw_record->get_data_model(sw_record);
	178
	179	writer->write_uint32(writer, sw_record->get_record_id(sw_record));
	180	writer->write_uint24(writer, data_model.vendor_id);
	181	writer->write_uint8 (writer, data_model.type);
	182	writer->write_uint8 (writer, sw_record->get_source_id(sw_record));
	183	writer->write_uint8 (writer, action);
	184	writer->write_data16(writer, sw_record->get_sw_id(sw_record, &sw_locator));
	185	writer->write_data16(writer, sw_locator);
	186
	187	if (has_record)
	188	{
	189	writer->write_data32(writer, sw_record->get_record(sw_record));
	190	}
	191	}
	192
84c0366b AS	193	METHOD(pa_tnc_attr_t, build, void,
	194	private_ietf_swima_attr_sw_ev_t *this)
	195	{
	196	bio_writer_t *writer;
	197	swima_event_t *sw_event;
	198	swima_record_t *sw_record;
27ec213d AS	199	chunk_t timestamp;
	200	uint32_t last_eid, last_consulted_eid, eid_epoch;
	201	uint8_t action;
84c0366b AS	202	enumerator_t *enumerator;
	203
	204	if (this->value.ptr)
	205	{
	206	return;
	207	}
	208	last_consulted_eid = this->events->get_eid(this->events, &eid_epoch,
	209	&last_eid);
	210
	211	writer = bio_writer_create(IETF_SWIMA_SW_EV_MIN_SIZE);
	212	writer->write_uint8 (writer, this->flags);
	213	writer->write_uint24(writer, this->events->get_count(this->events));
	214	writer->write_uint32(writer, this->request_id);
	215	writer->write_uint32(writer, eid_epoch);
	216	writer->write_uint32(writer, last_eid);
	217	writer->write_uint32(writer, last_consulted_eid);
	218
	219	enumerator = this->events->create_enumerator(this->events);
	220	while (enumerator->enumerate(enumerator, &sw_event))
	221	{
84c0366b AS	222	action = sw_event->get_action(sw_event);
84c0366b AS	223	sw_record = sw_event->get_sw_record(sw_event);
84c0366b	224
27ec213d	225	writer->write_uint32(writer, sw_event->get_eid(sw_event, &timestamp));
84c0366b	226	writer->write_data (writer, timestamp);
27ec213d AS	227
	228	ietf_swima_attr_sw_ev_build_sw_record(writer, action, sw_record,
	229	this->type.type == IETF_ATTR_SW_EVENTS);
84c0366b AS	230	}
	231	enumerator->destroy(enumerator);
	232
	233	this->value = writer->extract_buf(writer);
	234	this->segment = this->value;
	235	this->length = this->value.len;
	236	writer->destroy(writer);
	237	}
	238
27ec213d AS	239	/**
	240	* This function is shared with ietf_swima_attr_sw_inv.c
	241	**/
	242	bool ietf_swima_attr_sw_ev_process_sw_record(bio_reader_t *reader,
	243	uint8_t action, swima_record_t *sw_record, bool has_record)
	244	{
	245	pen_type_t data_model;
	246	swima_record_t *sw_rec;
	247	uint32_t data_model_pen, record_id;
	248	uint8_t data_model_type, source_id, reserved;
	249	chunk_t sw_id, sw_locator, record = chunk_empty;
	250
	251	if (!reader->read_uint32(reader, &record_id) \|\|
	252	!reader->read_uint24(reader, &data_model_pen) \|\|
	253	!reader->read_uint8 (reader, &data_model_type) \|\|
	254	!reader->read_uint8 (reader, &source_id) \|\|
	255	!reader->read_uint8 (reader, &reserved) \|\|
	256	!reader->read_data16(reader, &sw_id) \|\|
	257	!reader->read_data16(reader, &sw_locator))
	258	{
	259	return FALSE;
	260	}
	261
	262	if (action)
	263	{
	264	*action = reserved;
	265	}
	266
	267	if (has_record && !reader->read_data32(reader, &record))
	268	{
	269	return FALSE;
	270	}
	271
	272	data_model = pen_type_create(data_model_pen, data_model_type);
	273	sw_rec = swima_record_create(record_id, sw_id, sw_locator);
	274	sw_rec->set_data_model(sw_rec, data_model);
	275	sw_rec->set_source_id(sw_rec, source_id);
	276	sw_rec->set_record(sw_rec, record);
	277	*sw_record = sw_rec;
	278
	279	return TRUE;
	280	}
	281
84c0366b AS	282	METHOD(pa_tnc_attr_t, process, status_t,
	283	private_ietf_swima_attr_sw_ev_t this, uint32_t offset)
	284	{
	285	bio_reader_t *reader;
84c0366b	286	uint32_t eid, eid_epoch, last_eid, last_consulted_eid;
27ec213d AS	287	uint8_t action;
27ec213d AS	288	chunk_t timestamp;
84c0366b AS	289	swima_event_t *sw_event;
	290	swima_record_t *sw_record;
	291	status_t status = NEED_MORE;
	292
	293	if (this->offset == 0)
	294	{
	295	if (this->length < IETF_SWIMA_SW_EV_MIN_SIZE)
	296	{
	297	DBG1(DBG_TNC, "insufficient data for %N/%N", pen_names, PEN_IETF,
	298	ietf_attr_names, this->type.type);
	299	*offset = this->offset;
	300	return FAILED;
	301	}
	302	if (this->value.len < IETF_SWIMA_SW_EV_MIN_SIZE)
	303	{
	304	return NEED_MORE;
	305	}
	306	reader = bio_reader_create(this->value);
	307	reader->read_uint8 (reader, &this->flags);
	308	reader->read_uint24(reader, &this->event_count);
	309	reader->read_uint32(reader, &this->request_id);
	310	reader->read_uint32(reader, &eid_epoch);
	311	reader->read_uint32(reader, &last_eid);
	312	reader->read_uint32(reader, &last_consulted_eid);
	313	this->offset = IETF_SWIMA_SW_EV_MIN_SIZE;
	314	this->events->set_eid(this->events, last_consulted_eid, eid_epoch);
	315	this->events->set_last_eid(this->events, last_eid);
	316	this->value = reader->peek(reader);
	317	reader->destroy(reader);
	318	}
	319
	320	reader = bio_reader_create(this->value);
	321
	322	while (this->event_count)
	323	{
	324	if (!reader->read_uint32(reader, &eid) \|\|
	325	!reader->read_data (reader, SW_EV_TIMESTAMP_SIZE, &timestamp) \|\|
27ec213d AS	326	!ietf_swima_attr_sw_ev_process_sw_record(reader, &action, &sw_record,
27ec213d AS	327	this->type.type == IETF_ATTR_SW_EVENTS))
84c0366b AS	328	{
	329	goto end;
	330	}
84c0366b	331
27ec213d AS	332	if (action == SWIMA_EVENT_ACTION_NONE \|\|
27ec213d AS	333	action > SWIMA_EVENT_ACTION_LAST)
84c0366b AS	334	{
	335	DBG1(DBG_TNC, "invalid event action value for %N/%N", pen_names,
	336	PEN_IETF, ietf_attr_names, this->type.type);
	337	*offset = this->offset;
27ec213d	338	sw_record->destroy(sw_record);
84c0366b AS	339	reader->destroy(reader);
	340
	341	return FAILED;
	342	}
	343
84c0366b AS	344	sw_event = swima_event_create(eid, timestamp, action, sw_record);
	345	this->events->add(this->events, sw_event);
	346	this->offset += this->value.len - reader->remaining(reader);
	347	this->value = reader->peek(reader);
	348
	349	/* at least one software event was processed */
	350	status = SUCCESS;
	351	this->event_count--;
	352	}
	353
	354	if (this->length == this->offset)
	355	{
	356	status = SUCCESS;
	357	}
	358	else
	359	{
	360	DBG1(DBG_TNC, "inconsistent length for %N/%N", pen_names, PEN_IETF,
	361	ietf_attr_names, this->type.type);
	362	*offset = this->offset;
	363	status = FAILED;
	364	}
	365
	366	end:
	367	reader->destroy(reader);
	368	return status;
	369	}
	370
	371	METHOD(pa_tnc_attr_t, add_segment, void,
	372	private_ietf_swima_attr_sw_ev_t *this, chunk_t segment)
	373	{
	374	this->value = chunk_cat("cc", this->value, segment);
	375	chunk_free(&this->segment);
	376	this->segment = this->value;
	377	}
	378
	379	METHOD(pa_tnc_attr_t, get_ref, pa_tnc_attr_t*,
	380	private_ietf_swima_attr_sw_ev_t *this)
	381	{
	382	ref_get(&this->ref);
	383	return &this->public.pa_tnc_attribute;
	384	}
	385
	386	METHOD(pa_tnc_attr_t, destroy, void,
	387	private_ietf_swima_attr_sw_ev_t *this)
	388	{
	389	if (ref_put(&this->ref))
	390	{
	391	this->events->destroy(this->events);
	392	free(this->segment.ptr);
	393	free(this);
	394	}
	395	}
	396
	397	METHOD(ietf_swima_attr_sw_ev_t, get_flags, uint8_t,
	398	private_ietf_swima_attr_sw_ev_t *this)
	399	{
	400	return this->flags;
	401	}
	402
	403	METHOD(ietf_swima_attr_sw_ev_t, get_request_id, uint32_t,
	404	private_ietf_swima_attr_sw_ev_t *this)
	405	{
	406	return this->request_id;
	407	}
408
409	METHOD(ietf_swima_attr_sw_ev_t, get_event_count, uint32_t,
410	private_ietf_swima_attr_sw_ev_t *this)
411	{
412	return this->event_count;
413	}
414
415	METHOD(ietf_swima_attr_sw_ev_t, set_events, void,
416	private_ietf_swima_attr_sw_ev_t this, swima_events_t events)
417	{
418	this->events->destroy(this->events);
419	this->events = events->get_ref(events);
420	}
421
422	METHOD(ietf_swima_attr_sw_ev_t, get_events, swima_events_t*,
423	private_ietf_swima_attr_sw_ev_t *this)
424	{
425	return this->events;
426	}
427
428	METHOD(ietf_swima_attr_sw_ev_t, clear_events, void,
429	private_ietf_swima_attr_sw_ev_t *this)
430	{
431	this->events->clear(this->events);
432	}
433
434	/**
435	* Described in header.
436	*/
437	pa_tnc_attr_t *ietf_swima_attr_sw_ev_create(uint8_t flags, uint32_t request_id,
438	bool sw_id_only)
439	{
440	private_ietf_swima_attr_sw_ev_t *this;
441	ietf_attr_t type;
442
443	type = sw_id_only ? IETF_ATTR_SW_ID_EVENTS : IETF_ATTR_SW_EVENTS;
444
445	INIT(this,
446	.public = {
447	.pa_tnc_attribute = {
448	.get_type = _get_type,
449	.get_value = _get_value,
450	.get_noskip_flag = _get_noskip_flag,
451	.set_noskip_flag = _set_noskip_flag,
452	.build = _build,
453	.process = _process,
454	.add_segment = _add_segment,
455	.get_ref = _get_ref,
456	.destroy = _destroy,
457	},
458	.get_flags = _get_flags,
459	.get_request_id = _get_request_id,
460	.get_event_count = _get_event_count,
461	.set_events = _set_events,
462	.get_events = _get_events,
463	.clear_events = _clear_events,
464	},
465	.type = { PEN_IETF, type },
466	.flags = flags,
467	.request_id = request_id,
468	.events = swima_events_create(),
469	.ref = 1,
470	);
471
472	return &this->public.pa_tnc_attribute;
473	}
474
475
476	/**
477	* Described in header.
478	*/
479	pa_tnc_attr_t *ietf_swima_attr_sw_ev_create_from_data(size_t length,
480	chunk_t data, bool sw_id_only)
481	{
482	private_ietf_swima_attr_sw_ev_t *this;
483	ietf_attr_t type;
484
485	type = sw_id_only ? IETF_ATTR_SW_ID_EVENTS : IETF_ATTR_SW_EVENTS;
486
487	INIT(this,
488	.public = {
489	.pa_tnc_attribute = {
490	.get_type = _get_type,
491	.get_value = _get_value,
492	.get_noskip_flag = _get_noskip_flag,
493	.set_noskip_flag = _set_noskip_flag,
494	.build = _build,
495	.process = _process,
496	.add_segment = _add_segment,
497	.get_ref = _get_ref,
498	.destroy = _destroy,
499	},
500	.get_flags = _get_flags,
501	.get_request_id = _get_request_id,
502	.get_event_count = _get_event_count,
503	.set_events = _set_events,
504	.get_events = _get_events,
505	.clear_events = _clear_events,
506	},
507	.type = { PEN_IETF, type },
508	.length = length,
509	.segment = chunk_clone(data),
510	.events = swima_events_create(),
511	.ref = 1,
512	);
513
514	/* received either complete attribute value or first segment */
515	this->value = this->segment;
516
517	return &this->public.pa_tnc_attribute;
518	}