Introduced payload types sa_payload and proposal_substructure
This commit is contained in:
Jan Hutter
parent
1b89ef112e
commit
da42afc5ec
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@ -37,5 +37,8 @@ mapping_t encoding_type_t_mappings[] = {
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{PAYLOAD_LENGTH, "PAYLOAD_LENGTH"},
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{HEADER_LENGTH, "HEADER_LENGTH"},
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{SPI_SIZE, "SPI_SIZE"},
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{PROPOSALS, "PROPOSALS"}
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{SPI, "SPI"},
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{PROPOSALS, "PROPOSALS"},
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{TRANSFORMS, "TRANSFORMS"},
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{MAPPING_END, NULL}
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};
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@ -181,6 +181,15 @@ enum encoding_type_e{
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* The current read pointer is moved 32 bit forward afterwards.
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*/
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SPI_SIZE,
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/**
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* Representating a spi field
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*
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* When generating the content of the chunkt pointing to
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* is written.
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*
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* When parsing SPI_SIZE bytes are read and written into the chunk pointing to.
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*/
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SPI,
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/**
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* Representating one or more proposal substructures
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*
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@ -192,7 +201,19 @@ enum encoding_type_e{
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* When parsing the parsed proposal_substructure_t objects have
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* to be stored in the pointed linked_list.
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*/
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PROPOSALS
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PROPOSALS,
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/**
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* Representating one or more transform substructures
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*
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* The offset points to a linked_list_t pointer.
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*
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* When generating the transform_substructure_t objects are stored
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* in the pointed linked_list.
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*
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* When parsing the parsed transform_substructure_t objects have
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* to be stored in the pointed linked_list.
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*/
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TRANSFORMS
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};
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/**
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@ -65,7 +65,7 @@ encoding_rule_t ike_header_encodings[] = {
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/* 4 Byte message id, stored in the field message_id */
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{ U_INT_32, offsetof(ike_header_t, message_id) },
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/* 4 Byte length fied, stored in the field length */
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{ LENGTH, offsetof(ike_header_t, length) }
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{ HEADER_LENGTH, offsetof(ike_header_t, length) }
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};
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@ -116,7 +116,7 @@ static payload_type_t get_next_type(payload_t *this)
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*/
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static size_t get_length(payload_t *this)
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{
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return sizeof(ike_header_t);
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return IKE_HEADER_LENGTH;
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}
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/*
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@ -52,6 +52,8 @@ mapping_t payload_type_t_mappings[] = {
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{CONFIGURATION, "CONFIGURATION"},
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{EXTENSIBLE_AUTHENTICATION, "EXTENSIBLE_AUTHENTICATION"},
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{HEADER, "HEADER"},
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{PROPOSAL_SUBSTRUCTURE, "PROPOSAL_SUBSTRUCTURE"},
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{TRANSFORM_SUBSTRUCTURE, "TRANSFORM_SUBSTRUCTURE"},
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{MAPPING_END, NULL}
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};
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@ -111,12 +111,28 @@ enum payload_type_e{
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EXTENSIBLE_AUTHENTICATION = 48,
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/**
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* Header has value 140 of PRIVATE USE space
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* Header has a value of PRIVATE USE space
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*
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* This payload type is not send over wire and just
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* used internally to handle IKEv2-Header like a payload.
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*/
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HEADER = 140
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HEADER = 140,
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/**
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* PROPOSAL_SUBSTRUCTURE has a value of PRIVATE USE space
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*
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* This payload type is not send over wire and just
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* used internally to handle a proposal substructure like a payload.
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*/
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PROPOSAL_SUBSTRUCTURE = 141,
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/**
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* TRANSFORM_SUBSTRUCTURE has a value of PRIVATE USE space
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*
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* This payload type is not send over wire and just
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* used internally to handle a transform substructure like a payload.
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*/
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TRANSFORM_SUBSTRUCTURE = 142,
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};
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@ -0,0 +1,223 @@
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/**
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* @file proposal_substructure.h
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*
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* @brief Declaration of the class proposal_substructure_t.
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*
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* An object of this type represents an IKEv2 PROPOSAL Substructure and contains transforms.
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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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/* offsetof macro */
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#include <stddef.h>
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#include "proposal_substructure.h"
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#include "encodings.h"
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#include "../types.h"
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#include "../utils/allocator.h"
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#include "../utils/linked_list.h"
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/**
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* Private data of an proposal_substructure_t' Object
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*
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*/
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typedef struct private_proposal_substructure_s private_proposal_substructure_t;
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struct private_proposal_substructure_s {
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/**
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* public proposal_substructure_t interface
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*/
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proposal_substructure_t public;
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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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* Length of this payload
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*/
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u_int16_t proposal_length;
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/**
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* Proposal number
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*/
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u_int8_t proposal_number;
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/**
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* Protocol ID
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*/
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u_int8_t protocol_id;
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/**
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* SPI size of the following SPI
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*/
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u_int8_t spi_size;
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/**
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* Number of transforms
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*/
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u_int8_t transforms_count;
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/**
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* SPI is stored as chunk
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*/
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chunk_t spi;
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/**
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* Transforms are stored in a linked_list_t
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*/
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linked_list_t * transforms;
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};
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/**
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* Encoding rules to parse or generate a Proposal substructure
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*
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* The defined offsets are the positions in a object of type
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* private_proposal_substructure_t.
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*
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*/
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encoding_rule_t proposal_substructure_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_proposal_substructure_t, next_payload) },
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/* Reserved Byte is skipped */
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{ RESERVED_BYTE, 0 },
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/* Length of the whole SA payload*/
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{ PAYLOAD_LENGTH, offsetof(private_proposal_substructure_t, proposal_length) },
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/* proposal number is a number of 8 bit */
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{ U_INT_8, offsetof(private_proposal_substructure_t, proposal_number) },
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/* protocol ID is a number of 8 bit */
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{ U_INT_8, offsetof(private_proposal_substructure_t, protocol_id) },
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/* SPI Size has its own type */
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{ SPI_SIZE, offsetof(private_proposal_substructure_t, spi_size) },
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/* Number of transforms is a number of 8 bit */
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{ U_INT_8, offsetof(private_proposal_substructure_t, transforms_count) },
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/* SPI is a chunk of variable size*/
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{ SPI, offsetof(private_proposal_substructure_t, spi) },
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/* Transforms are stored in a transform substructure,
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offset points to a linked_list_t pointer */
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{ TRANSFORMS, offsetof(private_proposal_substructure_t, transforms) }
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};
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/**
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* Implements payload_t's and proposal_substructure_t's destroy function.
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* See #payload_s.destroy or proposal_substructure_s.destroy for description.
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*/
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static status_t destroy(private_proposal_substructure_t *this)
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{
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/* all proposals are getting destroyed */
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while (this->transforms->get_count(this->transforms) > 0)
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{
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transforms_substructure_t *current_transform;
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if (this->transforms->remove_last(this->transforms,(void **)¤t_transform) != SUCCESS)
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{
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break;
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}
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current_transform->destroy(current_transform);
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}
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this->transforms->destroy(this->transforms);
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if (this->spi.ptr != NULL)
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{
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allocator_free(this->spi.ptr);
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}
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allocator_free(this);
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return SUCCESS;
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}
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/**
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* Implements payload_t's get_encoding_rules function.
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* See #payload_s.get_encoding_rules for description.
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*/
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static status_t get_encoding_rules(private_proposal_substructure_t *this, encoding_rule_t **rules, size_t *rule_count)
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{
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*rules = proposal_substructure_encodings;
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*rule_count = sizeof(proposal_substructure_encodings) / sizeof(encoding_rule_t);
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return SUCCESS;
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}
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/**
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* Implements payload_t's get_type function.
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* See #payload_s.get_type for description.
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*/
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static payload_type_t get_type(private_proposal_substructure_t *this)
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{
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return PROPOSAL_SUBSTRUCTURE;
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}
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/**
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* Implements payload_t's get_next_type function.
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* See #payload_s.get_next_type for description.
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*/
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static payload_type_t get_next_type(private_proposal_substructure_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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* Implements payload_t's get_length function.
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* See #payload_s.get_length for description.
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*/
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static size_t get_length(private_proposal_substructure_t *this)
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{
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return this->proposal_length;
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}
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/*
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* Described in header
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*/
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proposal_substructure_t *proposal_substructure_create()
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{
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private_proposal_substructure_t *this = allocator_alloc_thing(private_proposal_substructure_t);
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if (this == NULL)
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{
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return NULL;
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}
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this->public.payload_interface.get_encoding_rules = (status_t (*) (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.get_type = (payload_type_t (*) (payload_t *)) get_type;
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this->public.payload_interface.destroy = (status_t (*) (payload_t *))destroy;
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this->public.destroy = (status_t (*) (proposal_substructure_t *)) destroy;
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/* set default values of the fields */
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this->next_payload = NO_PAYLOAD;
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this->proposal_length = 0;
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this->proposal_number = 0;
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this->protocol_id = 0;
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this->transforms_count = 0;
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this->spi_size = 0;
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this->spi.ptr = NULL;
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this->spi.len = 0;
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this->transforms = linked_list_create();
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if (this->transforms == NULL)
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{
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allocator_free(this);
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return NULL;
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}
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return (&(this->public));
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}
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@ -0,0 +1,68 @@
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/**
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* @file proposal_substructure.h
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*
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* @brief Declaration of the class proposal_substructure_t.
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*
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* An object of this type represents an IKEv2 PROPOSAL Substructure and contains transforms.
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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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#ifndef PROPOSAL_SUBSTRUCTURE_H_
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#define PROPOSAL_SUBSTRUCTURE_H_
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#include "../types.h"
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#include "payload.h"
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/**
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* Object representing an IKEv2- PROPOSAL SUBSTRUCTURE
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*
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* The PROPOSAL SUBSTRUCTURE format is described in RFC section 3.3.1.
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*
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*/
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typedef struct proposal_substructure_s proposal_substructure_t;
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struct proposal_substructure_s {
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/**
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* implements payload_t interface
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*/
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payload_t payload_interface;
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/**
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* @brief Destroys an proposal_substructure_t object.
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*
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* @param this proposal_substructure_t object to destroy
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* @return
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* SUCCESS in any case
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*/
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status_t (*destroy) (proposal_substructure_t *this);
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};
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/**
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* @brief Creates an empty proposal_substructure_t object
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*
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* @return
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* - created proposal_substructure_t object, or
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* - NULL if failed
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*/
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proposal_substructure_t *proposal_substructure_create();
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#endif /*PROPOSAL_SUBSTRUCTURE_H_*/
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@ -0,0 +1,191 @@
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/**
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* @file sa_payload.h
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*
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* @brief Declaration of the class sa_payload_t.
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*
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* An object of this type represents an IKEv2 SA-Payload and contains proposal
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* substructures.
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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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/* offsetof macro */
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#include <stddef.h>
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#include "sa_payload.h"
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#include "encodings.h"
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#include "../utils/allocator.h"
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#include "../utils/linked_list.h"
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/**
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* Private data of an sa_payload_t' Object
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*
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*/
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typedef struct private_sa_payload_s private_sa_payload_t;
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struct private_sa_payload_s {
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/**
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* public sa_payload_t interface
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*/
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sa_payload_t public;
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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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* Proposals in this payload are stored in a linked_list_t
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*/
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linked_list_t * proposals;
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};
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/**
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* Encoding rules to parse or generate a IKEv2-Header
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*
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* The defined offsets are the positions in a object of type
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* private_sa_payload_t.
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*
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*/
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encoding_rule_t sa_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_sa_payload_t, next_payload) },
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/* the critical bit */
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{ FLAG, offsetof(private_sa_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 SA payload*/
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{ PAYLOAD_LENGTH, offsetof(private_sa_payload_t, payload_length) },
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/* Proposals are stored in a proposal substructure,
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offset points to a linked_list_t pointer */
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{ PROPOSALS, offsetof(private_sa_payload_t, proposals) }
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};
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/**
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* Implements payload_t's and sa_payload_t's destroy function.
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* See #payload_s.destroy or sa_payload_s.destroy for description.
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*/
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static status_t destroy(private_sa_payload_t *this)
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{
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/* all proposals are getting destroyed */
|
||||
while (this->proposals->get_count(this->proposals) > 0)
|
||||
{
|
||||
proposal_substructure_t *current_proposal;
|
||||
if (this->proposals->remove_last(this->proposals,(void **)¤t_proposal) != SUCCESS)
|
||||
{
|
||||
break;
|
||||
}
|
||||
current_proposal->destroy(current_proposal);
|
||||
}
|
||||
this->proposals->destroy(this->proposals);
|
||||
|
||||
allocator_free(this);
|
||||
|
||||
return SUCCESS;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implements payload_t's get_encoding_rules function.
|
||||
* See #payload_s.get_encoding_rules for description.
|
||||
*/
|
||||
static status_t get_encoding_rules(private_sa_payload_t *this, encoding_rule_t **rules, size_t *rule_count)
|
||||
{
|
||||
*rules = sa_payload_encodings;
|
||||
*rule_count = sizeof(sa_payload_encodings) / sizeof(encoding_rule_t);
|
||||
|
||||
return SUCCESS;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implements payload_t's get_type function.
|
||||
* See #payload_s.get_type for description.
|
||||
*/
|
||||
static payload_type_t get_type(private_sa_payload_t *this)
|
||||
{
|
||||
return SECURITY_ASSOCIATION;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implements payload_t's get_next_type function.
|
||||
* See #payload_s.get_next_type for description.
|
||||
*/
|
||||
static payload_type_t get_next_type(private_sa_payload_t *this)
|
||||
{
|
||||
return (this->next_payload);
|
||||
}
|
||||
|
||||
/**
|
||||
* Implements payload_t's get_length function.
|
||||
* See #payload_s.get_length for description.
|
||||
*/
|
||||
static size_t get_length(private_sa_payload_t *this)
|
||||
{
|
||||
return this->payload_length;
|
||||
}
|
||||
|
||||
/*
|
||||
* Described in header
|
||||
*/
|
||||
sa_payload_t *sa_payload_create()
|
||||
{
|
||||
private_sa_payload_t *this = allocator_alloc_thing(private_sa_payload_t);
|
||||
if (this == NULL)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
this->public.payload_interface.get_encoding_rules = (status_t (*) (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.get_type = (payload_type_t (*) (payload_t *)) get_type;
|
||||
this->public.payload_interface.destroy = (status_t (*) (payload_t *))destroy;
|
||||
this->public.destroy = (status_t (*) (sa_payload_t *)) destroy;
|
||||
|
||||
/* set default values of the fields */
|
||||
this->critical = SA_PAYLOAD_CRITICAL_FLAG;
|
||||
this->next_payload = NO_PAYLOAD;
|
||||
this->payload_length = SA_PAYLOAD_HEADER_LENGTH;
|
||||
|
||||
this->proposals = linked_list_create();
|
||||
|
||||
if (this->proposals == NULL)
|
||||
{
|
||||
allocator_free(this);
|
||||
return NULL;
|
||||
}
|
||||
return (&(this->public));
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -0,0 +1,78 @@
|
|||
/**
|
||||
* @file sa_payload.h
|
||||
*
|
||||
* @brief Declaration of the class sa_payload_t.
|
||||
*
|
||||
* An object of this type represents an IKEv2 SA-Payload and contains proposal
|
||||
* substructures.
|
||||
*
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2005 Jan Hutter, Martin Willi
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifndef SA_PAYLOAD_H_
|
||||
#define SA_PAYLOAD_H_
|
||||
|
||||
#include "../types.h"
|
||||
#include "payload.h"
|
||||
#include "proposal_substructure.h"
|
||||
|
||||
/**
|
||||
* Critical flag must not be set
|
||||
*/
|
||||
#define SA_PAYLOAD_CRITICAL_FLAG FALSE;
|
||||
|
||||
/**
|
||||
* SA_PAYLOAD length in bytes without any proposal substructure
|
||||
*/
|
||||
#define SA_PAYLOAD_HEADER_LENGTH 4
|
||||
|
||||
/**
|
||||
* Object representing an IKEv2-SA Payload
|
||||
*
|
||||
* The SA Payload format is described in RFC section 3.3.
|
||||
*
|
||||
*/
|
||||
typedef struct sa_payload_s sa_payload_t;
|
||||
|
||||
struct sa_payload_s {
|
||||
/**
|
||||
* implements payload_t interface
|
||||
*/
|
||||
payload_t payload_interface;
|
||||
|
||||
/**
|
||||
* @brief Destroys an sa_payload_t object.
|
||||
*
|
||||
* @param this sa_payload_t object to destroy
|
||||
* @return
|
||||
* SUCCESS in any case
|
||||
*/
|
||||
status_t (*destroy) (sa_payload_t *this);
|
||||
};
|
||||
|
||||
/**
|
||||
* @brief Creates an empty sa_payload_t object
|
||||
*
|
||||
* @return
|
||||
* - created sa_payload_t object, or
|
||||
* - NULL if failed
|
||||
*/
|
||||
|
||||
sa_payload_t *sa_payload_create();
|
||||
|
||||
|
||||
#endif /*SA_PAYLOAD_H_*/
|
||||
Loading…
Reference in New Issue