2005-11-29 15:23:04 +00:00
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/**
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* @file ts_payload.c
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*
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* @brief Implementation of ts_payload_t.
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*
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*/
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/*
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* Copyright (C) 2005 Jan Hutter, Martin Willi
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* 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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2006-04-10 08:07:38 +00:00
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#include <stddef.h>
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2005-11-29 15:23:04 +00:00
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#include "ts_payload.h"
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#include <encoding/payloads/encodings.h>
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#include <utils/linked_list.h>
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typedef struct private_ts_payload_t private_ts_payload_t;
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/**
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* Private data of an ts_payload_t object.
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*
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*/
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struct private_ts_payload_t {
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/**
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* Public ts_payload_t interface.
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*/
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ts_payload_t public;
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/**
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* TRUE if this TS payload is of type TSi, FALSE for TSr.
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*/
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bool is_initiator;
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/**
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* Next payload type.
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*/
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u_int8_t next_payload;
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/**
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* Critical flag.
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*/
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bool critical;
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/**
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* Length of this payload.
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*/
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u_int16_t payload_length;
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/**
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* Number of traffic selectors
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*/
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u_int8_t number_of_traffic_selectors;
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/**
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* Contains the traffic selectors of type traffic_selector_substructure_t.
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*/
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linked_list_t *traffic_selectors;
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/**
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* @brief Computes the length of this payload.
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*
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* @param this calling private_ts_payload_t object
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*/
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void (*compute_length) (private_ts_payload_t *this);
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};
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/**
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* Encoding rules to parse or generate a TS payload
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*
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* The defined offsets are the positions in a object of type
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* private_ts_payload_t.
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*
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*/
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encoding_rule_t ts_payload_encodings[] = {
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/* 1 Byte next payload type, stored in the field next_payload */
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{ U_INT_8, offsetof(private_ts_payload_t, next_payload) },
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/* the critical bit */
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{ FLAG, offsetof(private_ts_payload_t, critical) },
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/* 7 Bit reserved bits, nowhere stored */
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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/* Length of the whole payload*/
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{ PAYLOAD_LENGTH, offsetof(private_ts_payload_t, payload_length)},
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/* 1 Byte TS type*/
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{ U_INT_8, offsetof(private_ts_payload_t, number_of_traffic_selectors) },
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/* 3 reserved bytes */
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{ RESERVED_BYTE, 0 },
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{ RESERVED_BYTE, 0 },
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{ RESERVED_BYTE, 0 },
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/* some ts data bytes, length is defined in PAYLOAD_LENGTH */
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{ TRAFFIC_SELECTORS, offsetof(private_ts_payload_t, traffic_selectors) }
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};
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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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! Next Payload !C! RESERVED ! Payload Length !
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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! Number of TSs ! RESERVED !
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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! !
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~ <Traffic Selectors> ~
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! !
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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/**
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* Implementation of payload_t.verify.
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*/
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static status_t verify(private_ts_payload_t *this)
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{
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iterator_t *iterator;
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2005-12-07 10:25:32 +00:00
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status_t status = SUCCESS;
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2005-11-29 15:23:04 +00:00
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if (this->number_of_traffic_selectors != (this->traffic_selectors->get_count(this->traffic_selectors)))
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{
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/* must be the same */
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return FAILED;
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}
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iterator = this->traffic_selectors->create_iterator(this->traffic_selectors,TRUE);
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while(iterator->has_next(iterator))
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{
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payload_t *current_traffic_selector;
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iterator->current(iterator,(void **)¤t_traffic_selector);
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status = current_traffic_selector->verify(current_traffic_selector);
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if (status != SUCCESS)
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{
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break;
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}
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}
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iterator->destroy(iterator);
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return status;
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}
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/**
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* Implementation of ts_payload_t.get_encoding_rules.
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*/
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static void get_encoding_rules(private_ts_payload_t *this, encoding_rule_t **rules, size_t *rule_count)
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{
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*rules = ts_payload_encodings;
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*rule_count = sizeof(ts_payload_encodings) / sizeof(encoding_rule_t);
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}
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/**
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* Implementation of payload_t.get_type.
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*/
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static payload_type_t get_payload_type(private_ts_payload_t *this)
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{
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2005-12-02 08:01:43 +00:00
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if (this->is_initiator)
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{
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return TRAFFIC_SELECTOR_INITIATOR;
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}
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else
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{
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return TRAFFIC_SELECTOR_RESPONDER;
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}
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2005-11-29 15:23:04 +00:00
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}
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/**
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* Implementation of payload_t.get_next_type.
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*/
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static payload_type_t get_next_type(private_ts_payload_t *this)
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{
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return (this->next_payload);
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}
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/**
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* Implementation of payload_t.set_next_type.
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*/
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static void set_next_type(private_ts_payload_t *this,payload_type_t type)
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{
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this->next_payload = type;
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}
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/**
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* Implementation of payload_t.get_length.
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*/
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static size_t get_length(private_ts_payload_t *this)
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{
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this->compute_length(this);
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return this->payload_length;
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}
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/**
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* Implementation of ts_payload_t.get_initiator.
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*/
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static bool get_initiator (private_ts_payload_t *this)
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{
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return (this->is_initiator);
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}
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/**
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* Implementation of ts_payload_t.set_initiator.
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*/
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static void set_initiator (private_ts_payload_t *this,bool is_initiator)
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{
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this->is_initiator = is_initiator;
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}
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/**
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* Implementation of ts_payload_t.add_traffic_selector_substructure.
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*/
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static void add_traffic_selector_substructure (private_ts_payload_t *this,traffic_selector_substructure_t *traffic_selector)
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{
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this->traffic_selectors->insert_last(this->traffic_selectors,traffic_selector);
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2005-12-01 17:38:06 +00:00
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this->number_of_traffic_selectors = this->traffic_selectors->get_count(this->traffic_selectors);
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2005-11-29 15:23:04 +00:00
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}
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/**
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* Implementation of ts_payload_t.create_traffic_selector_substructure_iterator.
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*/
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static iterator_t * create_traffic_selector_substructure_iterator (private_ts_payload_t *this, bool forward)
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{
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return this->traffic_selectors->create_iterator(this->traffic_selectors,forward);
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}
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2005-12-01 18:14:22 +00:00
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/**
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* Implementation of ts_payload_t.get_traffic_selectors.
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*/
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2006-02-22 16:14:40 +00:00
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static linked_list_t *get_traffic_selectors(private_ts_payload_t *this)
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2005-12-01 17:38:06 +00:00
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{
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2006-02-22 16:14:40 +00:00
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traffic_selector_t *ts;
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2005-12-01 17:38:06 +00:00
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iterator_t *iterator;
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2006-02-22 16:14:40 +00:00
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linked_list_t *ts_list = linked_list_create();
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2005-12-01 17:38:06 +00:00
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iterator = this->traffic_selectors->create_iterator(this->traffic_selectors, TRUE);
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2005-12-01 18:14:22 +00:00
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while (iterator->has_next(iterator))
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2005-12-01 17:38:06 +00:00
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{
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traffic_selector_substructure_t *ts_substructure;
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iterator->current(iterator, (void**)&ts_substructure);
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2006-02-22 16:14:40 +00:00
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ts = ts_substructure->get_traffic_selector(ts_substructure);
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ts_list->insert_last(ts_list, (void*)ts);
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2005-12-01 17:38:06 +00:00
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}
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2005-12-01 18:14:22 +00:00
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iterator->destroy(iterator);
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2005-12-01 17:38:06 +00:00
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2006-02-22 16:14:40 +00:00
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return ts_list;
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2005-12-01 17:38:06 +00:00
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}
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2005-11-29 15:23:04 +00:00
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/**
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* Implementation of private_ts_payload_t.compute_length.
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*/
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static void compute_length (private_ts_payload_t *this)
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{
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iterator_t *iterator;
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size_t ts_count = 0;
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size_t length = TS_PAYLOAD_HEADER_LENGTH;
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iterator = this->traffic_selectors->create_iterator(this->traffic_selectors,TRUE);
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while (iterator->has_next(iterator))
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{
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payload_t * current_traffic_selector;
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iterator->current(iterator,(void **) ¤t_traffic_selector);
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length += current_traffic_selector->get_length(current_traffic_selector);
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ts_count++;
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}
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iterator->destroy(iterator);
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this->number_of_traffic_selectors= ts_count;
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this->payload_length = length;
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}
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/**
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* Implementation of payload_t.destroy and ts_payload_t.destroy.
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*/
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static void destroy(private_ts_payload_t *this)
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{
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while (this->traffic_selectors->get_count(this->traffic_selectors) > 0)
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{
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payload_t *current_traffic_selector;
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this->traffic_selectors->remove_last(this->traffic_selectors,(void **) ¤t_traffic_selector);
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current_traffic_selector->destroy(current_traffic_selector);
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}
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this->traffic_selectors->destroy(this->traffic_selectors);
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2006-04-10 08:07:38 +00:00
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free(this);
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2005-11-29 15:23:04 +00:00
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}
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/*
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* Described in header
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*/
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ts_payload_t *ts_payload_create(bool is_initiator)
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{
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2006-04-10 08:07:38 +00:00
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private_ts_payload_t *this = malloc_thing(private_ts_payload_t);
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2005-11-29 15:23:04 +00:00
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/* interface functions */
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this->public.payload_interface.verify = (status_t (*) (payload_t *))verify;
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this->public.payload_interface.get_encoding_rules = (void (*) (payload_t *, encoding_rule_t **, size_t *) ) get_encoding_rules;
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this->public.payload_interface.get_length = (size_t (*) (payload_t *)) get_length;
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this->public.payload_interface.get_next_type = (payload_type_t (*) (payload_t *)) get_next_type;
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this->public.payload_interface.set_next_type = (void (*) (payload_t *,payload_type_t)) set_next_type;
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this->public.payload_interface.get_type = (payload_type_t (*) (payload_t *)) get_payload_type;
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this->public.payload_interface.destroy = (void (*) (payload_t *))destroy;
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/* public functions */
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this->public.destroy = (void (*) (ts_payload_t *)) destroy;
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this->public.get_initiator = (bool (*) (ts_payload_t *)) get_initiator;
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this->public.set_initiator = (void (*) (ts_payload_t *,bool)) set_initiator;
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this->public.add_traffic_selector_substructure = (void (*) (ts_payload_t *,traffic_selector_substructure_t *)) add_traffic_selector_substructure;
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this->public.create_traffic_selector_substructure_iterator = (iterator_t* (*) (ts_payload_t *,bool)) create_traffic_selector_substructure_iterator;
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2006-02-22 16:14:40 +00:00
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this->public.get_traffic_selectors = (linked_list_t *(*) (ts_payload_t *)) get_traffic_selectors;
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2005-11-29 15:23:04 +00:00
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/* private functions */
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this->compute_length = compute_length;
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/* private variables */
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this->critical = FALSE;
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this->next_payload = NO_PAYLOAD;
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this->payload_length =TS_PAYLOAD_HEADER_LENGTH;
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this->is_initiator = is_initiator;
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2005-12-07 10:25:32 +00:00
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this->number_of_traffic_selectors = 0;
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2005-12-01 17:38:06 +00:00
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this->traffic_selectors = linked_list_create();
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return &(this->public);
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}
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2005-11-29 15:23:04 +00:00
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2005-12-01 17:38:06 +00:00
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/*
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* Described in header
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*/
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2006-02-22 16:14:40 +00:00
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ts_payload_t *ts_payload_create_from_traffic_selectors(bool is_initiator, linked_list_t *traffic_selectors)
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2005-12-01 17:38:06 +00:00
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{
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2006-02-22 16:14:40 +00:00
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iterator_t *iterator;
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traffic_selector_t *ts;
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traffic_selector_substructure_t *ts_substructure;
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2005-12-01 17:38:06 +00:00
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private_ts_payload_t *this;
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this = (private_ts_payload_t*)ts_payload_create(is_initiator);
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2006-02-22 16:14:40 +00:00
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iterator = traffic_selectors->create_iterator(traffic_selectors, TRUE);
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while (iterator->has_next(iterator))
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2005-12-01 17:38:06 +00:00
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{
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2006-02-22 16:14:40 +00:00
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iterator->current(iterator, (void**)&ts);
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ts_substructure = traffic_selector_substructure_create_from_traffic_selector(ts);
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2005-12-01 17:38:06 +00:00
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this->public.add_traffic_selector_substructure(&(this->public), ts_substructure);
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}
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2006-02-22 16:14:40 +00:00
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iterator->destroy(iterator);
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2005-12-01 17:38:06 +00:00
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return &(this->public);
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2005-11-29 15:23:04 +00:00
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}
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2005-12-01 17:38:06 +00:00
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