Moving charon to libcharon.
This commit is contained in:
Tobias Brunner
@@ -0,0 +1,276 @@
|
||||
/*
|
||||
* Copyright (C) 2005-2006 Martin Willi
|
||||
* Copyright (C) 2005 Jan Hutter
|
||||
* 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 "traffic_selector_substructure.h"
|
||||
|
||||
#include <encoding/payloads/encodings.h>
|
||||
#include <utils/linked_list.h>
|
||||
|
||||
|
||||
typedef struct private_traffic_selector_substructure_t private_traffic_selector_substructure_t;
|
||||
|
||||
/**
|
||||
* Private data of an traffic_selector_substructure_t object.
|
||||
*
|
||||
*/
|
||||
struct private_traffic_selector_substructure_t {
|
||||
/**
|
||||
* Public traffic_selector_substructure_t interface.
|
||||
*/
|
||||
traffic_selector_substructure_t public;
|
||||
|
||||
/**
|
||||
* Type of traffic selector.
|
||||
*/
|
||||
u_int8_t ts_type;
|
||||
|
||||
/**
|
||||
* IP Protocol ID.
|
||||
*/
|
||||
u_int8_t ip_protocol_id;
|
||||
|
||||
/**
|
||||
* Length of this payload.
|
||||
*/
|
||||
u_int16_t payload_length;
|
||||
|
||||
/**
|
||||
* Start port number.
|
||||
*/
|
||||
u_int16_t start_port;
|
||||
|
||||
/**
|
||||
* End port number.
|
||||
*/
|
||||
u_int16_t end_port;
|
||||
|
||||
/**
|
||||
* Starting address.
|
||||
*/
|
||||
chunk_t starting_address;
|
||||
|
||||
/**
|
||||
* Ending address.
|
||||
*/
|
||||
chunk_t ending_address;
|
||||
};
|
||||
|
||||
/**
|
||||
* Encoding rules to parse or generate a TS payload
|
||||
*
|
||||
* The defined offsets are the positions in a object of type
|
||||
* private_traffic_selector_substructure_t.
|
||||
*
|
||||
*/
|
||||
encoding_rule_t traffic_selector_substructure_encodings[] = {
|
||||
/* 1 Byte next ts type*/
|
||||
{ TS_TYPE, offsetof(private_traffic_selector_substructure_t, ts_type) },
|
||||
/* 1 Byte IP protocol id*/
|
||||
{ U_INT_8, offsetof(private_traffic_selector_substructure_t, ip_protocol_id) },
|
||||
/* Length of the whole payload*/
|
||||
{ PAYLOAD_LENGTH, offsetof(private_traffic_selector_substructure_t, payload_length) },
|
||||
/* 2 Byte start port*/
|
||||
{ U_INT_16, offsetof(private_traffic_selector_substructure_t, start_port) },
|
||||
/* 2 Byte end port*/
|
||||
{ U_INT_16, offsetof(private_traffic_selector_substructure_t, end_port) },
|
||||
/* starting address is either 4 or 16 byte */
|
||||
{ ADDRESS, offsetof(private_traffic_selector_substructure_t, starting_address) },
|
||||
/* ending address is either 4 or 16 byte */
|
||||
{ ADDRESS, offsetof(private_traffic_selector_substructure_t, ending_address) }
|
||||
|
||||
};
|
||||
|
||||
/*
|
||||
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
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
! TS Type !IP Protocol ID*| Selector Length |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
| Start Port* | End Port* |
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
! !
|
||||
~ Starting Address* ~
|
||||
! !
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
! !
|
||||
~ Ending Address* ~
|
||||
! !
|
||||
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
*/
|
||||
|
||||
/**
|
||||
* Implementation of payload_t.verify.
|
||||
*/
|
||||
static status_t verify(private_traffic_selector_substructure_t *this)
|
||||
{
|
||||
if (this->start_port > this->end_port)
|
||||
{
|
||||
return FAILED;
|
||||
}
|
||||
switch (this->ts_type)
|
||||
{
|
||||
case TS_IPV4_ADDR_RANGE:
|
||||
{
|
||||
if ((this->starting_address.len != 4) ||
|
||||
(this->ending_address.len != 4))
|
||||
{
|
||||
/* ipv4 address must be 4 bytes long */
|
||||
return FAILED;
|
||||
}
|
||||
break;
|
||||
}
|
||||
case TS_IPV6_ADDR_RANGE:
|
||||
{
|
||||
if ((this->starting_address.len != 16) ||
|
||||
(this->ending_address.len != 16))
|
||||
{
|
||||
/* ipv6 address must be 16 bytes long */
|
||||
return FAILED;
|
||||
}
|
||||
break;
|
||||
}
|
||||
default:
|
||||
{
|
||||
/* not supported ts type */
|
||||
return FAILED;
|
||||
}
|
||||
}
|
||||
|
||||
return SUCCESS;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of traffic_selector_substructure_t.get_encoding_rules.
|
||||
*/
|
||||
static void get_encoding_rules(private_traffic_selector_substructure_t *this, encoding_rule_t **rules, size_t *rule_count)
|
||||
{
|
||||
*rules = traffic_selector_substructure_encodings;
|
||||
*rule_count = sizeof(traffic_selector_substructure_encodings) / sizeof(encoding_rule_t);
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of payload_t.get_type.
|
||||
*/
|
||||
static payload_type_t get_payload_type(private_traffic_selector_substructure_t *this)
|
||||
{
|
||||
return TRAFFIC_SELECTOR_SUBSTRUCTURE;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of payload_t.get_next_type.
|
||||
*/
|
||||
static payload_type_t get_next_type(private_traffic_selector_substructure_t *this)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of payload_t.set_next_type.
|
||||
*/
|
||||
static void set_next_type(private_traffic_selector_substructure_t *this,payload_type_t type)
|
||||
{
|
||||
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of payload_t.get_length.
|
||||
*/
|
||||
static size_t get_length(private_traffic_selector_substructure_t *this)
|
||||
{
|
||||
return this->payload_length;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of traffic_selector_substructure_t.get_traffic_selector.
|
||||
*/
|
||||
static traffic_selector_t *get_traffic_selector(private_traffic_selector_substructure_t *this)
|
||||
{
|
||||
traffic_selector_t *ts;
|
||||
ts = traffic_selector_create_from_bytes(this->ip_protocol_id, this->ts_type,
|
||||
this->starting_address, this->start_port,
|
||||
this->ending_address, this->end_port);
|
||||
return ts;
|
||||
}
|
||||
|
||||
/**
|
||||
* recompute length field of the payload
|
||||
*/
|
||||
void compute_length(private_traffic_selector_substructure_t *this)
|
||||
{
|
||||
this->payload_length = TRAFFIC_SELECTOR_HEADER_LENGTH +
|
||||
this->ending_address.len + this->starting_address.len;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of payload_t.destroy and traffic_selector_substructure_t.destroy.
|
||||
*/
|
||||
static void destroy(private_traffic_selector_substructure_t *this)
|
||||
{
|
||||
free(this->starting_address.ptr);
|
||||
free(this->ending_address.ptr);
|
||||
free(this);
|
||||
}
|
||||
|
||||
/*
|
||||
* Described in header
|
||||
*/
|
||||
traffic_selector_substructure_t *traffic_selector_substructure_create()
|
||||
{
|
||||
private_traffic_selector_substructure_t *this = malloc_thing(private_traffic_selector_substructure_t);
|
||||
|
||||
/* interface functions */
|
||||
this->public.payload_interface.verify = (status_t (*) (payload_t *))verify;
|
||||
this->public.payload_interface.get_encoding_rules = (void (*) (payload_t *, encoding_rule_t **, size_t *) ) get_encoding_rules;
|
||||
this->public.payload_interface.get_length = (size_t (*) (payload_t *)) get_length;
|
||||
this->public.payload_interface.get_next_type = (payload_type_t (*) (payload_t *)) get_next_type;
|
||||
this->public.payload_interface.set_next_type = (void (*) (payload_t *,payload_type_t)) set_next_type;
|
||||
this->public.payload_interface.get_type = (payload_type_t (*) (payload_t *)) get_payload_type;
|
||||
this->public.payload_interface.destroy = (void (*) (payload_t *))destroy;
|
||||
|
||||
/* public functions */
|
||||
this->public.get_traffic_selector = (traffic_selector_t* (*)(traffic_selector_substructure_t*))get_traffic_selector;
|
||||
this->public.destroy = (void (*) (traffic_selector_substructure_t *)) destroy;
|
||||
|
||||
/* private variables */
|
||||
this->payload_length = TRAFFIC_SELECTOR_HEADER_LENGTH;
|
||||
this->start_port = 0;
|
||||
this->end_port = 0;
|
||||
this->starting_address = chunk_empty;
|
||||
this->ending_address = chunk_empty;
|
||||
this->ip_protocol_id = 0;
|
||||
/* must be set to be valid */
|
||||
this->ts_type = TS_IPV4_ADDR_RANGE;
|
||||
|
||||
return (&(this->public));
|
||||
}
|
||||
|
||||
/*
|
||||
* Described in header
|
||||
*/
|
||||
traffic_selector_substructure_t *traffic_selector_substructure_create_from_traffic_selector(traffic_selector_t *traffic_selector)
|
||||
{
|
||||
private_traffic_selector_substructure_t *this = (private_traffic_selector_substructure_t*)traffic_selector_substructure_create();
|
||||
this->ts_type = traffic_selector->get_type(traffic_selector);
|
||||
this->ip_protocol_id = traffic_selector->get_protocol(traffic_selector);
|
||||
this->start_port = traffic_selector->get_from_port(traffic_selector);
|
||||
this->end_port = traffic_selector->get_to_port(traffic_selector);
|
||||
this->starting_address = chunk_clone(traffic_selector->get_from_address(traffic_selector));
|
||||
this->ending_address = chunk_clone(traffic_selector->get_to_address(traffic_selector));
|
||||
|
||||
compute_length(this);
|
||||
|
||||
return &(this->public);
|
||||
}
|
||||
Reference in New Issue
Block a user