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/*
* Copyright (C) 2010-2011 Mamadou Diop.
*
* Contact: Mamadou Diop <diopmamadou(at)doubango[dot]org>
*
* This file is part of Open Source Doubango Framework.
*
* DOUBANGO 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 3 of the License, or
* (at your option) any later version.
*
* DOUBANGO 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.
*
* You should have received a copy of the GNU General Public License
* along with DOUBANGO.
*
*/
/**@file tcomp_nackinfo.h
* @brief RFC 4077 - A Negative Acknowledgement Mechanism for Signaling Compression (NACK)
*
* @author Mamadou Diop <diopmamadou(at)yahoo.fr>
*
*/
#ifndef TCOMP_NAKINFO_H
#define TCOMP_NAKINFO_H
#include "tinysigcomp_config.h"
#include "tcomp_buffer.h"
#include "tsk_sha1.h"
#include "tsk_object.h"
TCOMP_BEGIN_DECLS
struct tcomp_message_s;
/*
+---+---+---+---+---+---+---+---+
| code_len = 0 |
+---+---+---+---+---+---+---+---+
| code_len = 0 | version = 1 |
+---+---+---+---+---+---+---+---+
| Reason Code |
+---+---+---+---+---+---+---+---+
| OPCODE of failed instruction |
+---+---+---+---+---+---+---+---+
| PC of failed instruction |
| |
+---+---+---+---+---+---+---+---+
| |
: SHA-1 Hash of failed message :
| |
+---+---+---+---+---+---+---+---+
| |
: Error Details :
| |
+---+---+---+---+---+---+---+---+
*/
/**NACK info as per rfc 4077 subclause 3.1.
* You MUST use @ref tcomp_nackinfo_create() to create new nackinfo object.
*/
typedef struct tcomp_nackinfo_s
{
TSK_DECLARE_OBJECT;
uint8_t version; /**< Gives the version of the NACK mechanism being employed. */
uint8_t reasonCode; /**< The Reason Code is a one-byte value that indicates the nature of the decompression failure. */
uint8_t opcode; /**< The "OPCODE of failed instruction" is a one-byte field that includes the opcode to which the PC was pointing when the failure occurred */
uint32_t pc; /**< "PC of failed instruction" is a two-byte field containing the value of the program counter when failure occurred (i.e., the memory address of the failed UDVM instruction) */
uint8_t sha1[TSK_SHA1_DIGEST_SIZE]; /**<"SHA-1 Hash of failed message" contains the full 20-byte SHA-1 hash of the SigComp message that could not be decompressed */
tcomp_buffer_handle_t *details; /**< "Error Details" provides additional information that might be useful in correcting the problem that caused decompression failure.*/
}
tcomp_nackinfo_t;
tcomp_nackinfo_t* tcomp_nackinfo_create();
int tcomp_nackinfo_write(tcomp_buffer_handle_t* buffer,
uint8_t reasonCode,
uint8_t opCode,
int16_t memory_address_of_instruction,
const void* sigCompMessagePtr, tsk_size_t sigCompMessageSize,
tcomp_buffer_handle_t* lpDetails,
uint16_t udvm_size,
uint8_t cpbValue);
int tcomp_nackinfo_write_2(tcomp_buffer_handle_t* buffer,
uint8_t reasonCode,
uint8_t opCode,
int16_t memory_address_of_instruction,
const struct tcomp_message_s* sigCompMessage,
tcomp_buffer_handle_t* lpDetails,
uint16_t udvm_size,
uint8_t cpbValue);
int tcomp_nackinfo_write_3(tcomp_buffer_handle_t* buffer,
uint8_t reasonCode,
const void* sigCompMessagePtr, tsk_size_t sigCompMessageSize);
int tcomp_nackinfo_write_4(tcomp_buffer_handle_t* buffer,
uint8_t reasonCode,
const struct tcomp_message_s* sigCompMessage);
TINYSIGCOMP_API const char* tcomp_nackinfo_get_description(const tcomp_buffer_handle_t* buffer);
TINYSIGCOMP_GEXTERN const tsk_object_def_t *tcomp_nackinfo_def_t;
TCOMP_END_DECLS
#endif /* TCOMP_NAKINFO_H */
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