Moving charon to libcharon.
This commit is contained in:
Tobias Brunner
@@ -0,0 +1,264 @@
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/*
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* Copyright (C) 2005-2009 Martin Willi
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* Copyright (C) 2005 Jan Hutter
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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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#include <stddef.h>
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#include "configuration_attribute.h"
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#include <encoding/payloads/encodings.h>
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#include <library.h>
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#include <daemon.h>
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typedef struct private_configuration_attribute_t private_configuration_attribute_t;
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/**
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* Private data of an configuration_attribute_t object.
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*
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*/
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struct private_configuration_attribute_t {
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/**
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* Public configuration_attribute_t interface.
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*/
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configuration_attribute_t public;
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/**
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* Type of the attribute.
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*/
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u_int16_t type;
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/**
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* Length of the attribute.
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*/
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u_int16_t length;
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/**
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* Attribute value as chunk.
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*/
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chunk_t value;
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};
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/**
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* Encoding rules to parse or generate a configuration attribute.
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*
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* The defined offsets are the positions in a object of type
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* private_configuration_attribute_t.
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*/
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encoding_rule_t configuration_attribute_encodings[] = {
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{ RESERVED_BIT, 0 },
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/* type of the attribute as 15 bit unsigned integer */
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{ ATTRIBUTE_TYPE, offsetof(private_configuration_attribute_t, type) },
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/* Length of attribute value */
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{ CONFIGURATION_ATTRIBUTE_LENGTH, offsetof(private_configuration_attribute_t, length) },
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/* Value of attribute if attribute format flag is zero */
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{ CONFIGURATION_ATTRIBUTE_VALUE, offsetof(private_configuration_attribute_t, value) }
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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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!R| Attribute Type ! Length |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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~ Value ~
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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_configuration_attribute_t *this)
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{
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bool failed = FALSE;
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if (this->length != this->value.len)
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{
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DBG1(DBG_ENC, "invalid attribute length");
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return FAILED;
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}
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switch (this->type)
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{
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case INTERNAL_IP4_ADDRESS:
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case INTERNAL_IP4_NETMASK:
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case INTERNAL_IP4_DNS:
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case INTERNAL_IP4_NBNS:
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case INTERNAL_ADDRESS_EXPIRY:
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case INTERNAL_IP4_DHCP:
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if (this->length != 0 && this->length != 4)
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{
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failed = TRUE;
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}
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break;
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case INTERNAL_IP4_SUBNET:
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if (this->length != 0 && this->length != 8)
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{
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failed = TRUE;
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}
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break;
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case INTERNAL_IP6_ADDRESS:
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case INTERNAL_IP6_SUBNET:
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if (this->length != 0 && this->length != 17)
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{
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failed = TRUE;
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}
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break;
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case INTERNAL_IP6_DNS:
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case INTERNAL_IP6_NBNS:
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case INTERNAL_IP6_DHCP:
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if (this->length != 0 && this->length != 16)
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{
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failed = TRUE;
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}
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break;
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case SUPPORTED_ATTRIBUTES:
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if (this->length % 2)
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{
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failed = TRUE;
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}
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break;
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case APPLICATION_VERSION:
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/* any length acceptable */
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break;
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default:
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DBG1(DBG_ENC, "unknown attribute type %N",
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configuration_attribute_type_names, this->type);
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break;
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}
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if (failed)
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{
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DBG1(DBG_ENC, "invalid attribute length %d for %N",
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this->length, configuration_attribute_type_names, this->type);
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return FAILED;
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}
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return SUCCESS;
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}
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/**
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* Implementation of payload_t.get_encoding_rules.
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*/
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static void get_encoding_rules(private_configuration_attribute_t *this,
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encoding_rule_t **rules, size_t *rule_count)
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{
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*rules = configuration_attribute_encodings;
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*rule_count = sizeof(configuration_attribute_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_type(private_configuration_attribute_t *this)
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{
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return CONFIGURATION_ATTRIBUTE;
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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_configuration_attribute_t *this)
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{
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return NO_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_configuration_attribute_t *this,
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payload_type_t type)
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{
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}
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/**
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* Implementation of configuration_attribute_t.get_length.
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*/
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static size_t get_length(private_configuration_attribute_t *this)
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{
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return this->value.len + CONFIGURATION_ATTRIBUTE_HEADER_LENGTH;
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}
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/**
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* Implementation of configuration_attribute_t.get_type.
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*/
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static configuration_attribute_type_t get_configuration_attribute_type(
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private_configuration_attribute_t *this)
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{
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return this->type;
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}
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/**
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* Implementation of configuration_attribute_t.get_value.
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*/
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static chunk_t get_value(private_configuration_attribute_t *this)
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{
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return this->value;
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}
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/**
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* Implementation of configuration_attribute_t.destroy and payload_t.destroy.
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*/
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static void destroy(private_configuration_attribute_t *this)
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{
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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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* Described in header.
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*/
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configuration_attribute_t *configuration_attribute_create()
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{
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private_configuration_attribute_t *this;
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this = malloc_thing(private_configuration_attribute_t);
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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_type;
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this->public.payload_interface.destroy = (void(*)(payload_t*))destroy;
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this->public.get_value = (chunk_t(*)(configuration_attribute_t *))get_value;
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this->public.get_type = (configuration_attribute_type_t(*)(configuration_attribute_t *))get_configuration_attribute_type;
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this->public.destroy = (void (*)(configuration_attribute_t*))destroy;
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this->type = 0;
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this->value = chunk_empty;
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this->length = 0;
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return &this->public;
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}
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/*
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* Described in header.
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*/
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configuration_attribute_t *configuration_attribute_create_value(
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configuration_attribute_type_t type, chunk_t value)
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{
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private_configuration_attribute_t *this;
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this = (private_configuration_attribute_t*)configuration_attribute_create();
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this->type = ((u_int16_t)type) & 0x7FFF;
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this->value = chunk_clone(value);
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this->length = value.len;
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return &this->public;
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}
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