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/* csn1.h
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* Declarations and types for CSN1 dissection in wireshark.
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* By Vincent Helfre, based on original code by Jari Sassi
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* with the gracious authorization of STE
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* Copyright (c) 2011 ST-Ericsson
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*
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* $Id: packet-csn1.h 36306 2011-03-24 09:20:14Z etxrab $
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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 General Public License for more details.
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*/
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#ifndef _PACKET_CSN1_H_
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#define _PACKET_CSN1_H_
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#include <osmocom/core/bitvec.h>
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#include "wireshark_compat.h"
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/* Error codes */
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#define CSN_OK 0
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#define CSN_ERROR_GENERAL -1
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#define CSN_ERROR_DATA_NOT_VALID -2
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#define CSN_ERROR_IN_SCRIPT -3
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#define CSN_ERROR_INVALID_UNION_INDEX -4
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#define CSN_ERROR_NEED_MORE_BITS_TO_UNPACK -5
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#define CSN_ERROR_ILLEGAL_BIT_VALUE -6
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#define CSN_ERROR_INTERNAL -7
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#define CSN_ERROR_STREAM_NOT_SUPPORTED -8
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#define CSN_ERROR_MESSAGE_TOO_LONG -9
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#define CSN_ERROR_ -10
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/* CallBack return status */
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typedef gint16 CSN_CallBackStatus_t;
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#define CSNCBS_OK 0
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#define CSNCBS_NOT_OK -10
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#define CSNCBS_NOT_TO_US -11
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#define CSNCBS_NOT_COMPLETE -12
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#define CSNCBS_REVISION_LIMIT_STOP -20 /* Stop packing/unpacking - revision limit */
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#define CSNCBS_NOT_SUPPORTED_IE -21 /* Handling of the unpacked IE is not supported by MS-software */
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#ifndef ElementsOf
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#define ElementsOf(array) (sizeof(array) / sizeof(array[0]))
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#endif
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typedef void(*void_fn_t)(void);
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/* Context holding CSN1 parameters */
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typedef struct
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{
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gint remaining_bits_len; /* IN to an csn stream operation */
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gint bit_offset; /* IN/OUT to an csn stream operation */
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gint direction; /* 0 - decode; 1 - encode */
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} csnStream_t;
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typedef gint16 (*StreamSerializeFcn_t)(csnStream_t* ar, struct bitvec *vector, unsigned *readIndex, void* data);
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typedef CSN_CallBackStatus_t (*DissectorCallbackFcn_t)(struct bitvec *vector, unsigned *readIndex, void* param1, void* param2);
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typedef enum
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{
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CSN_END = 0,
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CSN_BIT,
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CSN_UINT,
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CSN_TYPE,
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CSN_CHOICE,
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CSN_UNION,
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CSN_UNION_LH,
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CSN_UINT_ARRAY,
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CSN_TYPE_ARRAY,
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CSN_BITMAP, /* Bitmap with constant: <bitmap: bit(64)> */
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CSN_VARIABLE_BITMAP, /* <N: bit (5)> <bitmap: bit(N + offset)> */
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CSN_VARIABLE_BITMAP_1, /* <bitmap: bit**> i.e. to the end of message (R99) */
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CSN_LEFT_ALIGNED_VAR_BMP, /* As variable bitmap but the result is left aligned (R99) */
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CSN_LEFT_ALIGNED_VAR_BMP_1,/* As above only size is to the end of message (R99) */
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CSN_PADDING_BITS, /* Padding bits fill to the end of the buffer */
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CSN_VARIABLE_ARRAY, /* Array with length specified in parameter: <N: bit(4)> <list: octet(N + offset)> */
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CSN_VARIABLE_TARRAY, /* Type Array with length specified in parameter: <N: bit(x)> <Type>*N */
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CSN_VARIABLE_TARRAY_OFFSET,/* As above but with offset. The offset is stored as third parameter of CSN_DESCR (descr.value) */
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CSN_RECURSIVE_ARRAY, /* Recursive way to specify an array of uint: <list> ::= {1 <number: bit(4) <list>|0}; */
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CSN_RECURSIVE_TARRAY, /* Recursive way to specify an array of type: <list> ::= {1 <type>} ** 0 ; */
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CSN_RECURSIVE_TARRAY_1, /* same as above but first element always exist:<list> ::= <type> {1 <type>} ** 0 ; */
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CSN_RECURSIVE_TARRAY_2, /* same as above but with reversed separators :<lists> ::= <type> { 0 <type> } ** 1 ; */
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CSN_EXIST,
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CSN_EXIST_LH,
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CSN_NEXT_EXIST,
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CSN_NEXT_EXIST_LH,
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CSN_NULL,
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CSN_FIXED,
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CSN_CALLBACK,
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CSN_UINT_OFFSET, /* unpack will add offset, inverse pack will subtract offset */
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CSN_UINT_LH, /* Low High extraction of int */
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CSN_SERIALIZE,
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CSN_TRAP_ERROR
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} csn_type_t;
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/******************************************************************************************
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* CSN_DESCR structure:
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*
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* type:
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* This is the CSN type. All existing types are specified in the section above.
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*
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* i:
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* Depending on the contents of the type parameter, the parameter "i" may have following meaning:
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* - specifies the number of bits for the CSN_UINT or CSN_UINT_OR_NULL types
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* - the offset for an array size by which the size is incremented
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* for the CSN_VAR_ARRAY type
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* - the length of each element of an array for the CSN_REC_ARRAY type
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* - the number of the elements in an array for the CSN_TYPE_ARRAY type
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* - the offset to the variable keeping the number of elements of an array for in the CSN_VAR_TARRAY type
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* - the number of different data types in a union for the CSN_UNION, CSN_UNION_LH, and for the CSN_CHOICE types
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* - the length in bits of the fixed number defined for the CSN_FIXED type
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* - the number of lines to skip in the CSN_DESCR type specified for the CSN_NEXT_EXIST, CSN_NEXT_EXIST_LH,
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* CSN_NEXT_EXIST_OR_NULL, and CSN_NEXT_EXIST_OR_NULL_LH types
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* - the number of bits in a bitmap for the CSN_BITMAP type
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* - the value by which the number of bits in a bitmap has to be incremented or decremented for the
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* CSN_VAR_BITMAP, CSN_LEFT_VAR_BMP, and CSN_LEFT_BMP_1 types
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* - the offset to param1 for the CSN_CALLBACK type
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* - ERRORCODE used by the CSN_ERROR type
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* - the bit-length of the LENGTH field in a CSN_SERIALISE type
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*
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* descr
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* This parameter has different meaning depending on the value of the type parameter:
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* - the offset for the CSN_UINT_OFFSET type
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* - the number of the elements in an array of the CSN_UINT_ARRAY type
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* - the offset to the parameter where the size of the array has to be stored for the CSN_REC_ARRAY type
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* - the address of the internal structure, describing the member type (by means of the CSN_DESCR type) in the
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* CSN_TYPE_ARRAY, CSN_VAR_TARRAY, and CSN_TYPE types
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* - the address of the variable of type CSN_ChoiceElement_t describing all elements in the CSN_CHOICE type union
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* - the offset to the variable where the number of bits has to be or is stored for the CSN_VAR_BITMAP,
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* CSN_LEFT_VAR_BMP, and CSN_LEFT_BMP_1 types
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* - the function number (case number) for the CSN_CALLBACK and CSN_CALLBACK_NO_ARGS types
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* - the free text used by the CSN_TRAP_ERROR
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*
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* offset
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* This is an offset to the _MEMBER parameter counting from the beginning of struct
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* where the unpacked or packed value shall be stored or fetched. The meaning of the _MEMBER parameter
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* varies depending on the type which is specified and so is the meaning of the offset parameter.
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* Some types (and corresponding macros) do not have the _MEMBER parameter and then the offset parameter
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* is not used or is different from the offset to the _MEMBER.
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* - the fixed value for the CSN_FIXED type
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* - an offset to the variable UnionType for CSN_UNION and CSN_UNION_LH types
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* - an offset to the variable Exist for CSN_NEXT_EXIST and CSN_NEXT_EXIST_LH types
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* - an offset to param2 in the CSN_CALLBACK type
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*
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* may_be_null
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* TRUE: if dissection may be attempted at an offset beyond the length of existing data bits
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* FALSE: othewise
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*
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* sz
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* - is the name of the parameter within the descr where their unpacked or packed value shall be stored or fetched.
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* This paramater is pointed out by the offset parameter in the same CSN_DESCR variable as the sz.
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* - the free text used by the CSN_TRAP_ERROR (the same as parameter "i")
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*
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* serialize
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* - stores the size of _MEMBER type in case of the M_TYPE_ARRAY and M_VAR_TARRAY,
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* - the address of the function which is provided by the M_SERIALIZE type.
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******************************************************************************************/
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typedef struct
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{
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gint16 type;
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gint16 i;
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union
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{
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const void* ptr;
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guint32 value;
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} descr;
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unsigned offset;
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gboolean may_be_null;
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const char* sz;
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guint32 value;
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void_fn_t aux_fn;
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} CSN_DESCR;
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typedef struct
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{
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guint8 bits;
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guint8 value;
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gboolean keep_bits;
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CSN_DESCR descr;
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} CSN_ChoiceElement_t;
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void csnStreamInit(csnStream_t* ar,gint BitOffset,gint BitCount);
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/******************************************************************************
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* FUNCTION: csnStreamDecoder
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* DESCRIPTION:
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* UnPacks data from bit stream. According to CSN description.
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* ARGS:
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* ar stream will hold the parameters to the pack function
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* ar->remaining_bits_len [IN] Number of bits to unpack [OUT] number of bits left to unpack.
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* ar->bit_offset [IN/OUT] is the current bit where to proceed with the next bit to unpack.
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* pDescr CSN description.
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* tvb buffer containing the bit stream to unpack.
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* data unpacked data.
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* ett_csn1 tree
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*
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* RETURNS: int Number of bits left to be unpacked. Negative Error code if failed to unpack all bits
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******************************************************************************/
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gint16 csnStreamDecoder(csnStream_t* ar, const CSN_DESCR* pDescr, struct bitvec *vector, unsigned *readIndex, void* data);
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gint16 csnStreamEncoder(csnStream_t* ar, const CSN_DESCR* pDescr, struct bitvec *vector, unsigned *writeIndex, void* data);
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/* CSN struct macro's */
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#define CSN_DESCR_BEGIN(_STRUCT)\
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CSN_DESCR CSNDESCR_##_STRUCT[] = {
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#define CSN_DESCR_END(_STRUCT)\
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{CSN_END, 0, {0}, 0, FALSE, "", 0, NULL} };
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/******************************************************************************
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* CSN_ERROR(Par1, Par2, Par3)
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* May be called at any time when an abort of packing or unpacking of a message
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* is desired
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* Par1: C structure name
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* Par2: free text which will appear in the error handler
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* Par3: Error code
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*****************************************************************************/
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#define CSN_ERROR(_STRUCT, _Text, _ERRCODE)\
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{CSN_TRAP_ERROR, _ERRCODE, {_Text}, 0, FALSE, _Text, 0, NULL}
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/******************************************************************************
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* M_BIT(Par1, Par2)
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* Defines one bit element in the CSN1 syntax.
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* Par1: C structure name
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* Par2: C structure element name
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*****************************************************************************/
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#define M_BIT(_STRUCT, _MEMBER)\
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{CSN_BIT, 0, {0}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, 0, NULL}
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/******************************************************************************
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* M_BIT_OR_NULL(Par1, Par2)
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* Similar to the M_BIT except that not only bit 0 or 1 but also the
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* end of the message may be encountered when looking for the next element in
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* the message.
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* Covers the case {null | 0 | 1}
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*****************************************************************************/
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#define M_BIT_OR_NULL(_STRUCT, _MEMBER)\
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{CSN_BIT, 0, {0}, offsetof(_STRUCT, _MEMBER), TRUE, #_MEMBER, 0, NULL}
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/******************************************************************************
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* M_NEXT_EXIST(Par1, Par2, Par3)
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* Indicates whether the next element or a group of elements defined in the
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* structure is present or not.
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* Par1: C structure name
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* Par2: C structure element name
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* Par3: number of lines to skip in the CSN_DESCR type specified if the
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* element(s) does not exist
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*****************************************************************************/
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#define M_NEXT_EXIST(_STRUCT, _MEMBER, _NoOfExisting)\
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{CSN_NEXT_EXIST, _NoOfExisting, {0}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, 0, NULL}
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/******************************************************************************
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* M_NEXT_EXIST_LH(Par1, Par2, Par3)
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* similar to the M_NEXT_EXIST except that instead of bit 0/1 which is fetched
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* from the message in order to find out whether the next element/elements are
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* present in the message, the logical operation XOR with the background
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* pattern 0x2B is performed on the read bit before the decision is made.
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*****************************************************************************/
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#define M_NEXT_EXIST_LH(_STRUCT, _MEMBER, _NoOfExisting)\
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{CSN_NEXT_EXIST_LH, _NoOfExisting, {0}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, 0, NULL}
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/******************************************************************************
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* M_NEXT_EXIST_OR_NULL(Par1, Par2, Par3)
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* Similar to the M_NEXT_EXIST except that not only bit 0 or 1 but also the end
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* of the message may be encountered when looking for the next element in the
|
|
|
|
|
* message.
|
|
|
|
|
* Covers the case {null | 0 | 1 < IE >}
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_NEXT_EXIST_OR_NULL(_STRUCT, _MEMBER, _NoOfExisting)\
|
|
|
|
|
{CSN_NEXT_EXIST, _NoOfExisting, {0}, offsetof(_STRUCT, _MEMBER), TRUE, #_MEMBER, 0, NULL}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_NEXT_EXIST_OR_NULL_LH(Par1, Par2, Par3)
|
|
|
|
|
* Similar to the M_NEXT_EXIST_LH except that not only bit 0 or 1 but also the
|
|
|
|
|
* end of the message may be encountered when looking for the next element in
|
|
|
|
|
* the message.
|
|
|
|
|
* Covers the case {null | L | H < IE >}
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_NEXT_EXIST_OR_NULL_LH(_STRUCT, _MEMBER, _NoOfExisting)\
|
|
|
|
|
{CSN_NEXT_EXIST_LH, _NoOfExisting, {(void*)1}, offsetof(_STRUCT, _MEMBER), TRUE, #_MEMBER, 0, NULL}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_UINT(Par1, Par2, Par3)
|
|
|
|
|
* Defines an integer number.
|
|
|
|
|
* Par1: C structure name
|
|
|
|
|
* Par2: C structure element name
|
|
|
|
|
* Par3: number of bits used to code the element (between 1 and 32)
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_UINT(_STRUCT, _MEMBER, _BITS)\
|
|
|
|
|
{CSN_UINT, _BITS, {0}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, 0, NULL}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_UINT_OR_NULL(Par1, Par2, Par3)
|
|
|
|
|
* Similar to the M_UINT except that not only the request set of bits but also the
|
|
|
|
|
* end of the message may be encountered when looking for the next element in
|
|
|
|
|
* the message.
|
|
|
|
|
* Covers the case {null | 0 | 1 < IE >}
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_UINT_OR_NULL(_STRUCT, _MEMBER, _BITS)\
|
|
|
|
|
{CSN_UINT, _BITS, {0}, offsetof(_STRUCT, _MEMBER), TRUE, #_MEMBER, 0, NULL}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_UINT(Par1, Par2, Par3)
|
|
|
|
|
* This macro has the same functionality as M_UINT except that in addition the
|
|
|
|
|
* logical "exclusive or" operation with the background value "0x2B" is
|
|
|
|
|
* performed before the final value of the integer number is delivered from the
|
|
|
|
|
* received CSN.1 message
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_UINT_LH(_STRUCT, _MEMBER, _BITS)\
|
|
|
|
|
{CSN_UINT_LH, _BITS, {0}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, 0, NULL}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_UINT_OFFSET(Par1, Par2, Par3, Par4)
|
|
|
|
|
* Defines an integer number.
|
|
|
|
|
* Par1: C structure name
|
|
|
|
|
* Par2: C structure element name
|
|
|
|
|
* Par3: number of bits used to code the element (between 1 and 32)
|
|
|
|
|
* Par4: value added to the returned integer (offset)
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_UINT_OFFSET(_STRUCT, _MEMBER, _BITS, _OFFSET)\
|
|
|
|
|
{CSN_UINT_OFFSET, _BITS, {(void*)_OFFSET}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, 0, NULL}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_UINT_ARRAY(Par1, Par2, Par3, Par4)
|
|
|
|
|
* Defines an array of integer numbers. The size of the array is fixed.
|
|
|
|
|
* Par1: C structure name
|
|
|
|
|
* Par2: C structure element name
|
|
|
|
|
* Par3: number of bits used to code the each integer element (between 1 and 32)
|
|
|
|
|
* Par4: number of elements in the array (fixed integer value)
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_UINT_ARRAY(_STRUCT, _MEMBER, _BITS, _ElementCount)\
|
|
|
|
|
{CSN_UINT_ARRAY, _BITS, {(void*)_ElementCount}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, 0, NULL}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_VAR_UINT_ARRAY(Par1, Par2, Par3, Par4)
|
|
|
|
|
* Defines an array of integer numbers. The size of the array is variable.
|
|
|
|
|
* Par1: C structure name
|
|
|
|
|
* Par2: C structure element name
|
|
|
|
|
* Par3: number of bits used to code the each integer element (between 1 and 32)
|
|
|
|
|
* Par4: number of elements in the array supplied by reference to the
|
|
|
|
|
* structure member holding the length value
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_VAR_UINT_ARRAY(_STRUCT, _MEMBER, _BITS, _ElementCountField)\
|
|
|
|
|
{CSN_UINT_ARRAY, _BITS, {(void*)offsetof(_STRUCT, _ElementCountField)}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, 1, NULL}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_VAR_ARRAY(Par1, Par2, Par3, Par4)
|
|
|
|
|
* Defines an array of 8 bit large integer numbers. The size of the array is variable.
|
|
|
|
|
* Par1: C structure name
|
|
|
|
|
* Par2: C structure element name
|
|
|
|
|
* Par3: name of the structure member holding the size of the array
|
|
|
|
|
* Par4: offset that is added to the Par3 to get the actual size of the array
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_VAR_ARRAY(_STRUCT, _MEMBER, _ElementCountField, _OFFSET)\
|
|
|
|
|
{CSN_VARIABLE_ARRAY, _OFFSET, {(void*)offsetof(_STRUCT, _ElementCountField)}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, 0, NULL}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_VAR_TARRAY(Par1, Par2, Par3, Par4)
|
|
|
|
|
* Similar to M_TYPE_ARRAY except that the size of the array is variable.
|
|
|
|
|
* Par1: C structure name
|
|
|
|
|
* Par2: C structure element name
|
|
|
|
|
* Par3: the type of each element of the array
|
|
|
|
|
* Par4: name of the structure member holding the size of the array
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_VAR_TARRAY(_STRUCT, _MEMBER, _MEMBER_TYPE, _ElementCountField)\
|
|
|
|
|
{CSN_VARIABLE_TARRAY, offsetof(_STRUCT, _ElementCountField), {(const void*)CSNDESCR_##_MEMBER_TYPE}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, sizeof(_MEMBER_TYPE), NULL}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_VAR_TARRAY_OFFSET(Par1, Par2, Par3, Par4)
|
|
|
|
|
* Same as M_VAR_TARRAY with offset
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_VAR_TARRAY_OFFSET(_STRUCT, _MEMBER, _MEMBER_TYPE, _ElementCountField)\
|
|
|
|
|
{CSN_VARIABLE_TARRAY_OFFSET, offsetof(_STRUCT, _ElementCountField), {(const void*)CSNDESCR_##_MEMBER_TYPE}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, sizeof(_MEMBER_TYPE), NULL}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_REC_ARRAY(Par1, Par2, Par3, Par4)
|
|
|
|
|
* similar to the M_VAR_ARRAY. The difference is that the size of the array is
|
|
|
|
|
* not known in advance and it has to be calculated during unpacking. Its value
|
|
|
|
|
* is stored in a variable which belongs to the same structure as the array.
|
|
|
|
|
* A zero element terminates the array. The CSN.1 syntax describes it
|
|
|
|
|
* recursively as:
|
|
|
|
|
* <array> ::={1 <element> <array>| 0}
|
|
|
|
|
*
|
|
|
|
|
* Par1: C structure name
|
|
|
|
|
* Par2: C structure element name
|
|
|
|
|
* Par3: name of the structure member where the calculated the size of the
|
|
|
|
|
* array will be stored
|
|
|
|
|
* Par4: length of each element in bits
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_REC_ARRAY(_STRUCT, _MEMBER, _ElementCountField, _BITS)\
|
|
|
|
|
{CSN_RECURSIVE_ARRAY, _BITS, {(const void*)offsetof(_STRUCT, _ElementCountField)}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, 0, NULL}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_VAR_TYPE_ARRAY(Par1, Par2, Par3, Par4)
|
|
|
|
|
* Defines an array of structures. The size of the array is variable.
|
|
|
|
|
* Par1: C structure name
|
|
|
|
|
* Par2: C structure element name
|
|
|
|
|
* Par3: name of the structure
|
|
|
|
|
* Par4: number of elements in the array (fixed integer value)
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_TYPE_ARRAY(_STRUCT, _MEMBER, _MEMBER_TYPE, _ElementCount)\
|
|
|
|
|
{CSN_TYPE_ARRAY, _ElementCount, {(const void*)CSNDESCR_##_MEMBER_TYPE}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, sizeof(_MEMBER_TYPE), NULL}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_REC_TARRAY(Par1, Par2, Par3, Par4)
|
|
|
|
|
* Defines an recursive array of structures. The size of the array is variable.
|
|
|
|
|
* <list> ::= {1 <type>} ** 0 ;
|
|
|
|
|
* Par1: C structure name
|
|
|
|
|
* Par2: C structure element name
|
|
|
|
|
* Par3: name of the structure
|
|
|
|
|
* Par4: will hold the number of element in the array after unpacking
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_REC_TARRAY(_STRUCT, _MEMBER, _MEMBER_TYPE, _ElementCountField)\
|
|
|
|
|
{CSN_RECURSIVE_TARRAY, offsetof(_STRUCT, _ElementCountField), {(const void*)CSNDESCR_##_MEMBER_TYPE}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, sizeof(_MEMBER_TYPE), (void_fn_t)ElementsOf(((_STRUCT*)0)->_MEMBER)}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_REC_TARRAY1(Par1, Par2, Par3, Par4)
|
|
|
|
|
* Same as M_REC_TARRAY but first element always exist:
|
|
|
|
|
* <list> ::= <type> {1 <type>} ** 0 ;
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_REC_TARRAY_1(_STRUCT, _MEMBER, _MEMBER_TYPE, _ElementCountField)\
|
|
|
|
|
{CSN_RECURSIVE_TARRAY_1, offsetof(_STRUCT, _ElementCountField), {(const void*)CSNDESCR_##_MEMBER_TYPE}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, sizeof(_MEMBER_TYPE), (void_fn_t)ElementsOf(((_STRUCT*)0)->_MEMBER)}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_REC_TARRAY2(Par1, Par2, Par3, Par4)
|
|
|
|
|
* Same as M_REC_TARRAY but with reversed separators :
|
|
|
|
|
* <lists> ::= <type> { 0 <type> } ** 1 ;
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_REC_TARRAY_2(_STRUCT, _MEMBER, _MEMBER_TYPE, _ElementCountField)\
|
|
|
|
|
{CSN_RECURSIVE_TARRAY_2, offsetof(_STRUCT, _ElementCountField), {(const void*)CSNDESCR_##_MEMBER_TYPE}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, sizeof(_MEMBER_TYPE), (void_fn_t)ElementsOf(((_STRUCT*)0)->_MEMBER)}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_TYPE(Par1, Par2, Par3)
|
|
|
|
|
* Defines a reference to a structure which is described elsewhere
|
|
|
|
|
* <list> ::= {1 <type>} ** 0 ;
|
|
|
|
|
* Par1: C structure name
|
|
|
|
|
* Par2: C structure element name
|
|
|
|
|
* Par3: type of member
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_TYPE(_STRUCT, _MEMBER, _MEMBER_TYPE)\
|
|
|
|
|
{CSN_TYPE, 0, {(const void*)CSNDESCR_##_MEMBER_TYPE}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, 0, NULL}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_TYPE_OR_NULL(Par1, Par2, Par3)
|
|
|
|
|
* Similar to the M_TYPE except that not only the request set of bits but also the
|
|
|
|
|
* end of the message may be encountered when looking for the next element in
|
|
|
|
|
* the message.
|
|
|
|
|
* Covers the case {null | 0 | 1 < IE >}
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_TYPE_OR_NULL(_STRUCT, _MEMBER, _MEMBER_TYPE)\
|
|
|
|
|
{CSN_TYPE, 0, {(const void*)CSNDESCR_##_MEMBER_TYPE}, offsetof(_STRUCT, _MEMBER), TRUE, #_MEMBER, 0, NULL}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_UNION(Par1, Par2)
|
|
|
|
|
* Informs the CSN.1 library that a union follows and how many possible choices
|
|
|
|
|
* there are in the union. The actual value of the choice, which points out the
|
|
|
|
|
* chosen element of the union is stored in the uint8 variable and is usually
|
|
|
|
|
* called UnionType. The elements of the union have to be listed directly after
|
|
|
|
|
* the M_UNION statement.
|
|
|
|
|
* Par1: C structure name
|
|
|
|
|
* Par2: number of possible choice in the union
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_UNION(_STRUCT, _COUNT)\
|
|
|
|
|
{CSN_UNION, _COUNT, {0}, offsetof(_STRUCT, UnionType), FALSE, "UnionType", 0, NULL}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_UNION_LH(Par1, Par2)
|
|
|
|
|
* Same as M_UNION but masked with background value 0x2B
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_UNION_LH(_STRUCT, _COUNT)\
|
|
|
|
|
{CSN_UNION_LH, _COUNT, {0}, offsetof(_STRUCT, UnionType), FALSE, "UnionType", 0, NULL}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_CHOICE(Par1, Par2, Par3, Par4)
|
|
|
|
|
* Similar to the M_UNION. In the M_UNION the selected element of all possible
|
|
|
|
|
* choices in the union is referred as a sequential numbers, i.e., the first
|
|
|
|
|
* choice is addressed as choice 0 the second as choice 1, the third as choice
|
|
|
|
|
* 2 and so on, both in the encoded message and in the variable UnionType which
|
|
|
|
|
* is the part of the message. In the CSN_CHOICE case, this rule does not
|
|
|
|
|
* apply. There is free but predefined mapping of the element of the union and
|
|
|
|
|
* the value which addresses this element.
|
|
|
|
|
* The value of the address is called a selector. Up to 256 (UCHAR_MAX) unique
|
|
|
|
|
* selectors can be handled, longer choice list would cause CSN_ERROR_IN_SCRIPT.
|
|
|
|
|
* After unpacking, this value is then converted to the sequential number of the
|
|
|
|
|
* element in the union and stored in the UnionType variable (Par2).
|
|
|
|
|
* Par1: C structure name
|
|
|
|
|
* Par2: C structure field name holding sequential number of the chosen element.
|
|
|
|
|
* BEWARE! Never use an enumerated type here, because its length is
|
|
|
|
|
* compiler/machine dependent, while decoder would cast it to guint8.
|
|
|
|
|
* Par3: address of an array of type CSN_ChoiceElement_t where all possible
|
|
|
|
|
* values of the selector are provided, together with the selector
|
|
|
|
|
* length expressed in bits and the address of the CSN_DESCR type
|
|
|
|
|
* where the element is defined. For every element in the union
|
|
|
|
|
* there is one line in the Choice variable. These lines have to
|
|
|
|
|
* appear in the _CHOICE in the same order as the elements in the
|
|
|
|
|
* union. The element of the union selected in the message through
|
|
|
|
|
* the _CHOICE parameter is after unpacking translated to the
|
|
|
|
|
* corresponding sequential number of this element and stored in
|
|
|
|
|
* the variable pointed out by the _MEMBER
|
|
|
|
|
* Par4: number of possible choices in the union
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_CHOICE(_STRUCT, _MEMBER, _CHOICE, _ElementCount)\
|
|
|
|
|
{CSN_CHOICE, _ElementCount, {(const void*)_CHOICE}, offsetof(_STRUCT, _MEMBER), FALSE, #_CHOICE, 0, NULL}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_FIXED(Par1, Par2, Par3)
|
|
|
|
|
* Defines a fixed value of type integer which should be fetched from or stored
|
|
|
|
|
* in the message
|
|
|
|
|
* Par1: C structure name
|
|
|
|
|
* Par2: gives the length of the fixed number in bits.
|
|
|
|
|
* Par3: the value of the number. If the expected value is not present in
|
|
|
|
|
* the message the unpacking procedure is aborted
|
|
|
|
|
*****************************************************************************/
|
|
|
|
|
#define M_FIXED(_STRUCT, _BITS, _BITVALUE)\
|
|
|
|
|
{CSN_FIXED, _BITS, {0}, _BITVALUE, FALSE, #_BITVALUE, 0, NULL}
|
|
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
|
|
|
* M_SERIALIZE(Par1, Par2, Par3)
|
|
|
|
|
* Allows using a complete free format of data being encoded or decoded.
|
|
|
|
|
* When the M_SERIALIZE is encounted during encoding or decoding of a message
|
|
|
|
|
* the CSNstream program passes the control over to the specified function
|
|
|
|
|
* together with all necessary parameters about the current position within
|
|
|
|
|
* the message being unpacked or packed. When transferring of "serialized"
|
|
|
|
|
* data to or from the message is finished by the function the CSNstream gets
|
|
|
|
|
* back control over the data stream and continues to work with the message.
|
|
|
|
|
*****************************************************************************/
|
|
|
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#define M_SERIALIZE(_STRUCT, _MEMBER, _LENGTH_LEN, _SERIALIZEFCN)\
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{CSN_SERIALIZE, _LENGTH_LEN, {0}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, 0, (void_fn_t)_SERIALIZEFCN}
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#define M_CALLBACK(_STRUCT, _CSNCALLBACKFCN, _PARAM1, _PARAM2)\
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{CSN_CALLBACK, offsetof(_STRUCT, _PARAM1), {0}, offsetof(_STRUCT, _PARAM2), FALSE, "CallBack_"#_CSNCALLBACKFCN, 0, (void_fn_t)_CSNCALLBACKFCN}
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/******************************************************************************
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* M_BITMAP(Par1, Par2, Par3)
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* Defines a type which consists of a bitmap. The size of the bitmap in bits
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* is fixed and provided by the parameter Par3
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* Par1: C structure name
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* Par2: C structure element name
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* Par3: length of the bitmap expressed in bits
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*****************************************************************************/
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#define M_BITMAP(_STRUCT, _MEMBER, _BITS)\
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{CSN_BITMAP, _BITS, {0}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, 0, NULL}
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/* variable length, right aligned bitmap i.e. _ElementCountField = 11 => 00000111 11111111 */
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#define M_VAR_BITMAP(_STRUCT, _MEMBER, _ElementCountField, _OFFSET)\
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{CSN_VARIABLE_BITMAP, _OFFSET, {(void*)offsetof(_STRUCT, _ElementCountField)}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, 0, NULL}
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/* variable length, right aligned bitmap filling the rest of message
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* - when unpacking the _ElementCountField will be set in runtime
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* - when packing _ElementCountField contains the size of bitmap
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*/
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#define M_VAR_BITMAP_1(_STRUCT, _MEMBER, _ElementCountField, _OFFSET)\
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{CSN_VARIABLE_BITMAP_1, _OFFSET, {(void*)offsetof(_STRUCT, _ElementCountField)}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, 0, NULL}
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/* variable length, left aligned bitmap i.e. _ElementCountField = 11 => 11111111 11100000 */
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#define M_LEFT_VAR_BMP(_STRUCT, _MEMBER, _ElementCountField, _OFFSET)\
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{CSN_LEFT_ALIGNED_VAR_BMP, _OFFSET, {(void*)offsetof(_STRUCT, _ElementCountField)}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, 0, NULL}
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/* variable length, left aligned bitmap filling the rest of message
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*- when unpacking the _ElementCountField will be set in runtime
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* - when packing _ElementCountField contains the size of bitmap
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*/
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#define M_LEFT_VAR_BMP_1(_STRUCT, _MEMBER, _ElementCountField, _OFFSET)\
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{CSN_LEFT_ALIGNED_VAR_BMP_1, _OFFSET, {(void*)offsetof(_STRUCT, _ElementCountField)}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, 0, NULL}
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/* todo: dissect padding bits looking for unexpected extensions */
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#define M_PADDING_BITS(_STRUCT)\
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{CSN_PADDING_BITS, 0, {0}, 0, TRUE, "Padding", 0, NULL}
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#define M_NULL(_STRUCT, _MEMBER, _SKIP_BITS)\
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{CSN_NULL, _SKIP_BITS, {0}, offsetof(_STRUCT, _MEMBER), FALSE, #_MEMBER, 0, NULL}
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#define M_THIS_EXIST(_STRUCT)\
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{CSN_EXIST, 0, {0}, offsetof(_STRUCT, Exist), FALSE, "Exist", 0, NULL}
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#define M_THIS_EXIST_LH(_STRUCT)\
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{CSN_EXIST_LH, 0, {0}, offsetof(_STRUCT, Exist), FALSE, "Exist", 0, NULL}
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/* return value 0 if ok else discontionue the unpacking */
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typedef gint16 (*CsnCallBackFcn_t)(void* pv ,...);
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#define CSNDESCR(_FuncType) CSNDESCR_##_FuncType
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#define pvDATA(_pv, _offset) ((void*) ((unsigned char*)_pv + _offset))
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#define pui8DATA(_pv, _offset) ((guint8*) pvDATA(_pv, _offset))
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#define pui16DATA(_pv, _offset) ((guint16*) pvDATA(_pv, _offset))
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#define pui32DATA(_pv, _offset) ((guint32*) pvDATA(_pv, _offset))
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#define pui64DATA(_pv, _offset) ((guint64*) pvDATA(_pv, _offset))
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/* used to tag existence of next element in variable length lists */
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#define STANDARD_TAG 1
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#define REVERSED_TAG 0
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gint16 ProcessError_impl(const char *file, int line, unsigned *readIndex,
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const char* sz, gint16 err, const CSN_DESCR* pDescr);
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#define ProcessError(readIndex, sz, err, pDescr) \
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ProcessError_impl(__FILE__, __LINE__, readIndex, sz, err, pDescr)
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#endif /*_PACKET_CSN1_H_*/
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