76 lines
3.0 KiB
C
76 lines
3.0 KiB
C
/*
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* Copyright (C) 2009 Mamadou Diop.
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*
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* Contact: Mamadou Diop <diopmamadou@yahoo.fr>
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*
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* This file is part of Open Source Doubango Framework.
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*
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* DOUBANGO is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* DOUBANGO is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with DOUBANGO.
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*
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*/
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/**@file tcomp_nakinfo.h
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* @brief RFC 4077 - A Negative Acknowledgement Mechanism for Signaling Compression (NACK)
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*
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* @author Mamadou Diop <diopmamadou(at)yahoo.fr>
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*
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* @date Created: Sat Nov 8 16:54:58 2009 mdiop
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*/
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#ifndef TCOMP_NAKINFO_H
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#define TCOMP_NAKINFO_H
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#include "tinysigcomp_config.h"
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#include "tcomp_buffer.h"
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#include "tsk_sha1.h"
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#include <stdint.h>
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/*
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+---+---+---+---+---+---+---+---+
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| code_len = 0 |
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+---+---+---+---+---+---+---+---+
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| code_len = 0 | version = 1 |
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+---+---+---+---+---+---+---+---+
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| Reason Code |
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+---+---+---+---+---+---+---+---+
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| OPCODE of failed instruction |
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+---+---+---+---+---+---+---+---+
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| PC of failed instruction |
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+---+---+---+---+---+---+---+---+
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: SHA-1 Hash of failed message :
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+---+---+---+---+---+---+---+---+
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: Error Details :
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+---+---+---+---+---+---+---+---+
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*/
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/**@typedef tcomp_nackinfo_t
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* NACK info as per rfc 4077 subclause 3.1.
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*/
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typedef struct tcomp_nackinfo_s
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{
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uint8_t version; /**< Gives the version of the NACK mechanism being employed. */
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uint8_t reasonCode; /**< The Reason Code is a one-byte value that indicates the nature of the decompression failure. */
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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 */
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uint16_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) */
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uint8_t sha1[TSK_SHA1HashSize]; /**<"SHA-1 Hash of failed message" contains the full 20-byte SHA-1 hash of the SigComp message that could not be decompressed */
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tcomp_buffer_handle_t *details; /**< "Error Details" provides additional information that might be useful in correcting the problem that caused decompression failure.*/
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}
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tcomp_nackinfo_t;
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tcomp_nackinfo_t* tcomp_nackinfo_create();
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void tcomp_nackinfo_destroy(tcomp_nackinfo_t **nackinfo);
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#endif /* TCOMP_NAKINFO_H */ |