Split csn1.c into common, enc and dec files
The CSN1 encoder/decoder code is already lengthy and complex enough,
there's no need to keep it in the same file, specially because when
debugging, only is interested in one of the 2 functions, and they both
look really similar (long spaghetti switches).
Change-Id: I7d1b1f7e6d7f89b052b3fd73a960419bb2673020
diff --git a/src/csn1_dec.c b/src/csn1_dec.c
new file mode 100644
index 0000000..2d3f242
--- /dev/null
+++ b/src/csn1_dec.c
@@ -0,0 +1,1390 @@
+/* csn1_dec.c
+ * Routines for CSN1 dissection in wireshark.
+ *
+ * Copyright (C) 2011 Ivan Klyuchnikov
+ *
+ * By Vincent Helfre, based on original code by Jari Sassi
+ * with the gracious authorization of STE
+ * Copyright (c) 2011 ST-Ericsson
+ *
+ * $Id: packet-csn1.c 39140 2011-09-25 22:01:50Z wmeier $
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * 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.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <assert.h>
+#include <string.h>
+#define __STDC_FORMAT_MACROS
+#include <inttypes.h>
+#include "csn1.h"
+#include <gprs_debug.h>
+
+#include <osmocom/core/logging.h>
+#include <osmocom/core/utils.h>
+
+extern const unsigned char ixBitsTab[];
+guint8 get_masked_bits8(struct bitvec *vector, unsigned *readIndex, gint bit_offset, const gint no_of_bits);
+
+/**
+ * ================================================================================================
+ * Return TRUE if tag in bit stream indicates existence of next list element,
+ * otherwise return FALSE.
+ * Will work for tag values equal to both 0 and 1.
+ * ================================================================================================
+ */
+
+static gboolean
+existNextElement(struct bitvec *vector, unsigned *readIndex, guint8 Tag)
+{
+ int res = bitvec_get_bit_pos(vector, (*readIndex)++);
+ if (Tag == STANDARD_TAG)
+ {
+ return (res > 0);
+ }
+ return (res == 0);
+}
+
+
+gint16
+csnStreamDecoder(csnStream_t* ar, const CSN_DESCR* pDescr, struct bitvec *vector, unsigned *readIndex, void* data)
+{
+ gint remaining_bits_len = ar->remaining_bits_len;
+ gint bit_offset = ar->bit_offset;
+ guint8* pui8 = NULL;
+ guint16* pui16;
+ guint32* pui32;
+ guint64* pui64;
+ guint8 Tag = STANDARD_TAG;
+ unsigned ib;
+
+ if (remaining_bits_len < 0)
+ {
+ return ProcessError(readIndex, __func__, CSN_ERROR_NEED_MORE_BITS_TO_UNPACK, pDescr);
+ }
+
+ do
+ {
+ switch (pDescr->type)
+ {
+ case CSN_BIT:
+ {
+ if (remaining_bits_len > 0)
+ {
+ pui8 = pui8DATA(data, pDescr->offset);
+ *pui8 = bitvec_read_field(vector, readIndex, 1);
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , (unsigned)*pui8);
+ /* end add the bit value to protocol tree */
+ }
+ else if (pDescr->may_be_null)
+ {
+ pui8 = pui8DATA(data, pDescr->offset);
+ *pui8 = 0;
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = NULL | ", pDescr->sz);
+ }
+ else
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_NEED_MORE_BITS_TO_UNPACK, pDescr);
+ }
+
+ pDescr++;
+ remaining_bits_len--;
+ bit_offset++;
+ break;
+ }
+
+ case CSN_NULL:
+ { /* Empty member! */
+ bit_offset += pDescr->i;
+ pDescr++;
+ break;
+ }
+
+ case CSN_UINT:
+ {
+ guint8 no_of_bits = (guint8) pDescr->i;
+
+ if (remaining_bits_len >= no_of_bits)
+ {
+ if (no_of_bits <= 8)
+ {
+ guint8 ui8 = bitvec_read_field(vector, readIndex, no_of_bits);
+ pui8 = pui8DATA(data, pDescr->offset);
+ *pui8 = ui8;
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , (unsigned)*pui8);
+ }
+ else if (no_of_bits <= 16)
+ {
+ guint16 ui16 = bitvec_read_field(vector, readIndex, no_of_bits);
+ pui16 = pui16DATA(data, pDescr->offset);
+ *pui16 = ui16;
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , *pui16);
+ }
+ else if (no_of_bits <= 32)
+ {
+ guint32 ui32 = bitvec_read_field(vector, readIndex, no_of_bits);
+ pui32 = pui32DATA(data, pDescr->offset);
+ *pui32 = ui32;
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = 0x%08x | ", pDescr->sz , *pui32);
+ }
+ else
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_GENERAL, pDescr);
+ }
+ remaining_bits_len -= no_of_bits;
+ bit_offset += no_of_bits;
+ }
+ else if (pDescr->may_be_null)
+ {
+ if (no_of_bits <= 8)
+ {
+ pui8 = pui8DATA(data, pDescr->offset);
+ *pui8 = 0;
+ }
+ else if (no_of_bits <= 16)
+ {
+ pui16 = pui16DATA(data, pDescr->offset);
+ *pui16 = 0;
+ }
+ else if (no_of_bits <= 32)
+ {
+ pui32 = pui32DATA(data, pDescr->offset);
+ *pui32 = 0;
+ }
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = NULL | ", pDescr->sz);
+ }
+ else
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_NEED_MORE_BITS_TO_UNPACK, pDescr);
+ }
+
+ pDescr++;
+ break;
+ }
+
+ case CSN_UINT_OFFSET:
+ {
+ guint8 no_of_bits = (guint8) pDescr->i;
+
+ if (remaining_bits_len >= no_of_bits)
+ {
+ if (no_of_bits <= 8)
+ {
+ guint8 ui8 = bitvec_read_field(vector, readIndex, no_of_bits);
+ pui8 = pui8DATA(data, pDescr->offset);
+ *pui8 = ui8 + (guint8)pDescr->descr.value;
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , (unsigned)*pui8);
+ }
+ else if (no_of_bits <= 16)
+ {
+ guint16 ui16 = bitvec_read_field(vector, readIndex, no_of_bits);
+ pui16 = pui16DATA(data, pDescr->offset);
+ *pui16 = ui16 + (guint16)pDescr->descr.value;
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , *pui16);
+ }
+ else if (no_of_bits <= 32)
+ {
+ guint32 ui32 = bitvec_read_field(vector, readIndex, no_of_bits);
+ pui32 = pui32DATA(data, pDescr->offset);
+ *pui32 = ui32 + (guint16)pDescr->descr.value;
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , *pui32);
+ }
+ else
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_GENERAL, pDescr);
+ }
+ }
+ else
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_NEED_MORE_BITS_TO_UNPACK, pDescr);
+ }
+
+ remaining_bits_len -= no_of_bits;
+ bit_offset += no_of_bits;
+ pDescr++;
+ break;
+ }
+
+ case CSN_UINT_LH:
+ {
+ guint8 no_of_bits = (guint8) pDescr->i;
+
+ if (remaining_bits_len >= no_of_bits)
+ {
+ if (no_of_bits <= 8)
+ {
+ guint8 ui8 = get_masked_bits8(vector, readIndex, bit_offset, no_of_bits);
+ pui8 = pui8DATA(data, pDescr->offset);
+ *pui8 = ui8;
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , (unsigned)*pui8);
+ }
+ else
+ {/* Maybe we should support more than 8 bits ? */
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_GENERAL, pDescr);
+ }
+ }
+ else
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_NEED_MORE_BITS_TO_UNPACK, pDescr);
+ }
+
+ remaining_bits_len -= no_of_bits;
+ bit_offset += no_of_bits;
+ pDescr++;
+ break;
+ }
+
+ case CSN_UINT_ARRAY:
+ {
+ guint8 no_of_bits = (guint8) pDescr->i;
+ guint16 nCount = (guint16)pDescr->descr.value; /* nCount supplied by value i.e. M_UINT_ARRAY(...) */
+
+ if (pDescr->value != 0)
+ { /* nCount specified by a reference to field holding value i.e. M_VAR_UINT_ARRAY(...) */
+ nCount = *pui16DATA(data, nCount);
+ }
+
+ if (remaining_bits_len >= (no_of_bits * nCount))
+ {
+ remaining_bits_len -= (no_of_bits*nCount);
+ if (no_of_bits <= 8)
+ {
+ pui8 = pui8DATA(data, pDescr->offset);
+ do
+ {
+ *pui8 = bitvec_read_field(vector, readIndex, no_of_bits);
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , (unsigned)*pui8);
+ pui8++;
+ bit_offset += no_of_bits;
+ } while (--nCount > 0);
+ }
+ else if (no_of_bits <= 16)
+ {
+ return ProcessError(readIndex,"csnStreamDecoder NOTIMPLEMENTED", 999, pDescr);
+ }
+ else if (no_of_bits <= 32)
+ {
+ return ProcessError(readIndex,"csnStreamDecoder NOTIMPLEMENTED", 999, pDescr);
+ }
+ else
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_GENERAL, pDescr);
+ }
+ }
+ else
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_NEED_MORE_BITS_TO_UNPACK, pDescr);
+ }
+ pDescr++;
+ break;
+ }
+
+ case CSN_VARIABLE_TARRAY_OFFSET:
+ case CSN_VARIABLE_TARRAY:
+ case CSN_TYPE_ARRAY:
+ {
+ gint16 Status;
+ csnStream_t arT = *ar;
+ gint16 nCount = pDescr->i;
+ guint16 nSize = (guint16)(gint32)pDescr->value;
+
+ pui8 = pui8DATA(data, pDescr->offset);
+ if (pDescr->type == CSN_VARIABLE_TARRAY)
+ { /* Count specified in field */
+ nCount = *pui8DATA(data, pDescr->i);
+ }
+ else if (pDescr->type == CSN_VARIABLE_TARRAY_OFFSET)
+ { /* Count specified in field */
+ nCount = *pui8DATA(data, pDescr->i);
+ /* nCount--; the 1 offset is already taken into account in CSN_UINT_OFFSET */
+ }
+
+ while (nCount > 0)
+ { /* resulting array of length 0 is possible
+ * but no bits shall be read from bitstream
+ */
+
+ LOGPC(DCSN1, LOGL_DEBUG, "%s | ", pDescr->sz);
+ csnStreamInit(&arT, bit_offset, remaining_bits_len);
+ Status = csnStreamDecoder(&arT, (const CSN_DESCR*)pDescr->descr.ptr, vector, readIndex, pui8);
+ if (Status >= 0)
+ {
+ pui8 += nSize;
+ remaining_bits_len = arT.remaining_bits_len;
+ bit_offset = arT.bit_offset;
+ }
+ else
+ {
+ return Status;
+ }
+ nCount--;
+ }
+
+ pDescr++;
+ break;
+ }
+
+ case CSN_BITMAP:
+ { /* bitmap with given length. The result is left aligned! */
+ guint8 no_of_bits = (guint8) pDescr->i; /* length of bitmap */
+
+ if (no_of_bits > 0)
+ {
+ if (no_of_bits > remaining_bits_len)
+ {
+ return ProcessError(readIndex, "csnStreamDecoder", CSN_ERROR_NEED_MORE_BITS_TO_UNPACK, pDescr);
+ }
+
+ if (no_of_bits <= 32)
+ {
+ for(ib = 0; ib < 4; ib++)
+ {
+ guint8 ui8 = bitvec_read_field(vector, readIndex, 8);
+ pui8 = pui8DATA(data, pDescr->offset+ib);
+ *pui8 = ui8;
+ LOGPC(DCSN1, LOGL_DEBUG, "%s[%u] = %u | ", pDescr->sz , ib, (unsigned)*pui8);
+ }
+ }
+ else if (no_of_bits <= 64)
+ {
+ for(ib = 0; ib < 8; ib++)
+ {
+ guint8 ui8 = bitvec_read_field(vector, readIndex, 8);
+ pui8 = pui8DATA(data, pDescr->offset+ib);
+ *pui8 = ui8;
+ LOGPC(DCSN1, LOGL_DEBUG, "%s[%u] = %u | ", pDescr->sz , ib, (unsigned)*pui8);
+ }
+ }
+ else
+ {
+ return ProcessError(readIndex,"csnStreamDecoder NOT IMPLEMENTED", 999, pDescr);
+ }
+
+ remaining_bits_len -= no_of_bits;
+ bit_offset += no_of_bits;
+ }
+ /* bitmap was successfully extracted or it was empty */
+
+ pDescr++;
+ break;
+ }
+
+ case CSN_TYPE:
+ {
+ gint16 Status;
+ csnStream_t arT = *ar;
+ LOGPC(DCSN1, LOGL_DEBUG, " : %s | ", pDescr->sz);
+ csnStreamInit(&arT, bit_offset, remaining_bits_len);
+ Status = csnStreamDecoder(&arT, (const CSN_DESCR*)pDescr->descr.ptr, vector, readIndex, pvDATA(data, pDescr->offset));
+ LOGPC(DCSN1, LOGL_DEBUG, ": End %s | ", pDescr->sz);
+ if (Status >= 0)
+ {
+ remaining_bits_len = arT.remaining_bits_len;
+ bit_offset = arT.bit_offset;
+ pDescr++;
+ }
+ else
+ {
+ /* Has already been processed: ProcessError("csnStreamDecoder", Status, pDescr); */
+ return Status;
+ }
+
+ break;
+ }
+
+ case CSN_CHOICE:
+ {
+ gint16 count = pDescr->i;
+ guint8 i = 0;
+ CSN_ChoiceElement_t* pChoice = (CSN_ChoiceElement_t*) pDescr->descr.ptr;
+
+ /* Make sure that the list of choice items is not empty */
+ if (!count)
+ return ProcessError(readIndex, "csnStreamDecoder", CSN_ERROR_IN_SCRIPT, pDescr);
+ else if (count > 255) /* We can handle up to 256 (UCHAR_MAX) selectors */
+ return ProcessError(readIndex, "csnStreamDecoder", CSN_ERROR_IN_SCRIPT, pDescr);
+
+ while (count > 0)
+ {
+ guint8 no_of_bits = pChoice->bits;
+ guint8 value = bitvec_read_field(vector, readIndex, no_of_bits);
+ if (value == pChoice->value)
+ {
+ CSN_DESCR descr[2];
+ gint16 Status;
+ csnStream_t arT = *ar;
+
+ descr[0] = pChoice->descr;
+ memset(&descr[1], 0x00, sizeof(CSN_DESCR));
+ descr[1].type = CSN_END;
+ pui8 = pui8DATA(data, pDescr->offset);
+ *pui8 = i;
+ LOGPC(DCSN1, LOGL_DEBUG, "Choice %s = %u | ", pDescr->sz , (unsigned)value);
+ if (!pChoice->keep_bits) {
+ bit_offset += no_of_bits;
+ remaining_bits_len -= no_of_bits;
+ }
+
+ csnStreamInit(&arT, bit_offset, remaining_bits_len);
+ Status = csnStreamDecoder(&arT, descr, vector, readIndex, data);
+
+ if (Status >= 0)
+ {
+ remaining_bits_len = arT.remaining_bits_len;
+ bit_offset = arT.bit_offset;
+ }
+ else
+ {
+ return Status;
+ }
+ break;
+ }
+
+ *readIndex -= no_of_bits;
+ count--;
+ pChoice++;
+ i++;
+ }
+
+ /* Neither of the choice items matched => unknown value */
+ if (!count)
+ return ProcessError(readIndex, "csnStreamDecoder", CSN_ERROR_STREAM_NOT_SUPPORTED, pDescr);
+
+ pDescr++;
+ break;
+ }
+
+ case CSN_SERIALIZE:
+ {
+ StreamSerializeFcn_t serialize = (StreamSerializeFcn_t)pDescr->aux_fn;
+ csnStream_t arT = *ar;
+ guint8 length_len = pDescr->i;
+ gint16 Status = -1;
+
+ guint8 length = bitvec_read_field(vector, readIndex, length_len);
+
+ LOGPC(DCSN1, LOGL_DEBUG, "%s length = %u | ", pDescr->sz , length);
+ bit_offset += length_len;
+ remaining_bits_len -= length_len;
+
+ csnStreamInit(&arT, bit_offset, length > 0 ? length : remaining_bits_len);
+ arT.direction = 1;
+ LOGPC(DCSN1, LOGL_DEBUG, "offset = %u | ", pDescr->offset);
+ Status = serialize(&arT, vector, readIndex, pvDATA(data, pDescr->offset));
+
+ if (Status >= 0)
+ {
+ if (length > 0) {
+ remaining_bits_len -= length;
+ bit_offset += length;
+ } else {
+ remaining_bits_len = arT.remaining_bits_len;
+ bit_offset = arT.bit_offset;
+ }
+
+ /* Skip bits not handled by serialize(), if any */
+ if (Status > 0) {
+ LOGPC(DCSN1, LOGL_DEBUG, "skipped = %d | ", Status);
+ *readIndex += Status;
+ }
+
+ pDescr++;
+ }
+ else
+ {
+ /* Has already been processed: */
+ return Status;
+ }
+
+ break;
+ }
+
+ case CSN_UNION_LH:
+ case CSN_UNION:
+ {
+ gint16 Bits;
+ guint8 index;
+ gint16 count = pDescr->i;
+ const CSN_DESCR* pDescrNext = pDescr;
+
+ pDescrNext += count + 1; /* now this is next after the union */
+ if ((count <= 0) || (count > 16))
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_INVALID_UNION_INDEX, pDescr);
+ }
+
+ /* Now get the bits to extract the index */
+ Bits = ixBitsTab[count];
+ index = 0;
+
+ while (Bits > 0)
+ {
+ index <<= 1;
+
+ if (CSN_UNION_LH == pDescr->type)
+ {
+ index |= get_masked_bits8(vector, readIndex, bit_offset, 1);
+ }
+ else
+ {
+ index |= bitvec_read_field(vector, readIndex, 1);
+ }
+ remaining_bits_len--;
+ bit_offset++;
+ Bits--;
+ }
+
+ /* Assign UnionType */
+ pui8 = pui8DATA(data, pDescr->offset);
+ *pui8 = index;
+
+
+ /* script index to continue on, limited in case we do not have a power of 2 */
+ pDescr += (MIN(index + 1, count));
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , (unsigned)*pui8);
+
+ switch (pDescr->type)
+ { /* get the right element of the union based on computed index */
+
+ case CSN_BIT:
+ {
+ pui8 = pui8DATA(data, pDescr->offset);
+ *pui8 = 0x00;
+ if (bitvec_read_field(vector, readIndex, 1) > 0)
+ {
+ *pui8 = 0x01;
+ }
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , (unsigned)*pui8);
+ remaining_bits_len -= 1;
+ bit_offset++;
+ pDescr++;
+ break;
+ }
+
+ case CSN_NULL:
+ { /* Empty member! */
+ bit_offset += pDescr->i;
+ pDescr++;
+ break;
+ }
+
+ case CSN_UINT:
+ {
+ guint8 no_of_bits = (guint8) pDescr->i;
+ if (remaining_bits_len >= no_of_bits)
+ {
+ if (no_of_bits <= 8)
+ {
+ guint8 ui8 = bitvec_read_field(vector, readIndex, no_of_bits);
+ pui8 = pui8DATA(data, pDescr->offset);
+ *pui8 = ui8;
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , (unsigned)*pui8);
+ }
+ else if (no_of_bits <= 16)
+ {
+ guint16 ui16 = bitvec_read_field(vector, readIndex, no_of_bits);
+ pui16 = pui16DATA(data, pDescr->offset);
+ *pui16 = ui16;
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , *pui16);
+ }
+ else if (no_of_bits <= 32)
+ {
+ guint32 ui32 = bitvec_read_field(vector, readIndex, no_of_bits);
+ pui32 = pui32DATA(data, pDescr->offset);
+ *pui32 = ui32;
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , *pui32);
+ }
+ else
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_GENERAL, pDescr);
+ }
+ }
+ else
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_GENERAL, pDescr);
+ }
+
+ remaining_bits_len -= no_of_bits;
+ bit_offset += no_of_bits;
+ pDescr++;
+ break;
+ }
+
+ case CSN_UINT_OFFSET:
+ {
+ guint8 no_of_bits = (guint8) pDescr->i;
+
+ if (remaining_bits_len >= no_of_bits)
+ {
+ if (no_of_bits <= 8)
+ {
+ guint8 ui8 = bitvec_read_field(vector, readIndex, no_of_bits);
+ pui8 = pui8DATA(data, pDescr->offset);
+ *pui8 = ui8 + (guint8)pDescr->descr.value;
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , (unsigned)*pui8);
+ }
+ else if (no_of_bits <= 16)
+ {
+ guint16 ui16 = bitvec_read_field(vector, readIndex, no_of_bits);
+ pui16 = pui16DATA(data, pDescr->offset);
+ *pui16 = ui16 + (guint16)pDescr->descr.value;
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , *pui16);
+ }
+ else if (no_of_bits <= 32)
+ {
+ guint32 ui32 = bitvec_read_field(vector, readIndex, no_of_bits);
+ pui32 = pui32DATA(data, pDescr->offset);
+ *pui32 = ui32 + (guint16)pDescr->descr.value;
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , *pui32);
+ }
+ else
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_GENERAL, pDescr);
+ }
+ }
+ else
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_NEED_MORE_BITS_TO_UNPACK, pDescr);
+ }
+
+ remaining_bits_len -= no_of_bits;
+ bit_offset += no_of_bits;
+ pDescr++;
+ break;
+ }
+
+ case CSN_UINT_LH:
+ {
+ guint8 no_of_bits = (guint8) pDescr->i;
+
+ if (remaining_bits_len >= no_of_bits)
+ {
+ if (no_of_bits <= 8)
+ {
+ guint8 ui8 = get_masked_bits8(vector, readIndex, bit_offset, no_of_bits);
+ pui8 = pui8DATA(data, pDescr->offset);
+ *pui8 = ui8;
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , (unsigned)*pui8);
+ }
+ else
+ { /* Maybe we should support more than 8 bits ? */
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_GENERAL, pDescr);
+ }
+ }
+ else
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_NEED_MORE_BITS_TO_UNPACK, pDescr);
+ }
+
+ remaining_bits_len -= no_of_bits;
+ bit_offset += no_of_bits;
+ pDescr++;
+ break;
+ }
+
+ case CSN_UINT_ARRAY:
+ {
+ guint8 no_of_bits = (guint8) pDescr->i;
+ guint16 nCount = (guint16)pDescr->descr.value; /* nCount supplied by value i.e. M_UINT_ARRAY(...) */
+
+ if (pDescr->value != 0)
+ { /* nCount specified by a reference to field holding value i.e. M_VAR_UINT_ARRAY(...) */
+ nCount = *pui16DATA(data, nCount);
+ }
+
+ if (remaining_bits_len >= (no_of_bits * nCount))
+ {
+ remaining_bits_len -= (no_of_bits * nCount);
+ if (no_of_bits <= 8)
+ {
+ pui8 = pui8DATA(data, pDescr->offset);
+
+ while (nCount > 0)
+ {
+ *pui8 = bitvec_read_field(vector, readIndex, no_of_bits);
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , (unsigned)*pui8);
+ pui8++;
+ bit_offset += no_of_bits;
+ nCount--;
+ }
+ }
+ else if (no_of_bits <= 16)
+ {
+ pui16 = pui16DATA(data, pDescr->offset);
+
+ while (nCount > 0)
+ {
+ *pui16 = bitvec_read_field(vector, readIndex, no_of_bits);
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , *pui16);
+ pui16++;
+ bit_offset += no_of_bits;
+ nCount--;
+ }
+ }
+ else if (no_of_bits <= 32)
+ { /* not supported */
+ return ProcessError(readIndex,"csnStreamDecoder NOT IMPLEMENTED", 999, pDescr);
+ }
+ else
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_GENERAL, pDescr);
+ }
+ }
+ else
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_NEED_MORE_BITS_TO_UNPACK, pDescr);
+ }
+
+ pDescr++;
+ break;
+ }
+
+ case CSN_VARIABLE_TARRAY_OFFSET:
+ case CSN_VARIABLE_TARRAY:
+ case CSN_TYPE_ARRAY:
+ {
+ gint16 Status;
+ csnStream_t arT = *ar;
+ guint16 nCount = (guint16) pDescr->i;
+ guint16 nSize = (guint16)(guint32)pDescr->value;
+
+ pui8 = pui8DATA(data, pDescr->offset);
+
+ if (CSN_VARIABLE_TARRAY == pDescr->type)
+ { /* Count specified in field */
+ nCount = *pui8DATA(data, pDescr->i);
+ }
+ else if (CSN_VARIABLE_TARRAY_OFFSET == pDescr->type)
+ { /* Count specified in field */
+ nCount = *pui8DATA(data, pDescr->i);
+ nCount--; /* Offset 1 */
+ }
+
+ while (nCount--) /* Changed to handle length = 0. */
+ {
+ LOGPC(DCSN1, LOGL_DEBUG, "%s | ", pDescr->sz);
+ csnStreamInit(&arT, bit_offset, remaining_bits_len);
+ Status = csnStreamDecoder(&arT, (const CSN_DESCR*)pDescr->descr.ptr, vector, readIndex, pui8);
+ if (Status >= 0)
+ {
+ pui8 += nSize;
+ remaining_bits_len = arT.remaining_bits_len;
+ bit_offset = arT.bit_offset;
+ }
+ else
+ {
+ return Status;
+ }
+ }
+
+ pDescr++;
+ break;
+ }
+
+ case CSN_BITMAP:
+ { /* bitmap with given length. The result is left aligned! */
+ guint8 no_of_bits = (guint8) pDescr->i; /* length of bitmap */
+
+ if (no_of_bits > 0)
+ {
+ if (no_of_bits > remaining_bits_len)
+ {
+ return ProcessError(readIndex, "csnStreamDecoder", CSN_ERROR_NEED_MORE_BITS_TO_UNPACK, pDescr);
+ }
+
+ if (no_of_bits <= 32)
+ {
+ guint32 ui32 = bitvec_read_field(vector, readIndex, no_of_bits);
+ pui32 = pui32DATA(data, pDescr->offset);
+ *pui32 = ui32;
+ }
+ else if (no_of_bits <= 64)
+ {
+ guint64 ui64 = bitvec_read_field(vector, readIndex, no_of_bits);
+ pui64 = pui64DATA(data, pDescr->offset);
+ *pui64 = ui64;
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %lu | ", pDescr->sz , *pui64);
+ }
+ else
+ {
+ return ProcessError(readIndex,"csnStreamDecoder NOT IMPLEMENTED", 999, pDescr);
+ }
+
+ remaining_bits_len -= no_of_bits;
+ bit_offset += no_of_bits;
+ }
+ /* bitmap was successfully extracted or it was empty */
+
+ pDescr++;
+ break;
+ }
+
+ case CSN_TYPE:
+ {
+ gint16 Status;
+ csnStream_t arT = *ar;
+ LOGPC(DCSN1, LOGL_DEBUG, " : %s | ", pDescr->sz);
+ csnStreamInit(&arT, bit_offset, remaining_bits_len);
+ Status = csnStreamDecoder(&arT, (const CSN_DESCR*)pDescr->descr.ptr, vector, readIndex, pvDATA(data, pDescr->offset));
+ LOGPC(DCSN1, LOGL_DEBUG, " : End %s | ", pDescr->sz);
+ if (Status >= 0)
+ {
+ remaining_bits_len = arT.remaining_bits_len;
+ bit_offset = arT.bit_offset;
+ pDescr++;
+ }
+ else
+ { /* return error code Has already been processed: */
+ return Status;
+ }
+
+ break;
+ }
+
+ default:
+ { /* descriptions of union elements other than above are illegal */
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_IN_SCRIPT, pDescr);
+ }
+ }
+
+ pDescr = pDescrNext;
+ break;
+ }
+
+ case CSN_EXIST:
+ case CSN_EXIST_LH:
+ {
+ guint8 fExist;
+
+ pui8 = pui8DATA(data, pDescr->offset);
+
+ if (CSN_EXIST_LH == pDescr->type)
+ {
+ fExist = get_masked_bits8(vector, readIndex, bit_offset, 1);
+ }
+ else
+ {
+ fExist = bitvec_read_field(vector, readIndex, 1);
+ }
+
+ *pui8 = fExist;
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , (unsigned)*pui8);
+ pDescr++;
+ bit_offset++;
+ remaining_bits_len -= 1;
+
+ if (!fExist)
+ {
+ ar->remaining_bits_len = remaining_bits_len;
+ ar->bit_offset = bit_offset;
+ return remaining_bits_len;
+ }
+
+ break;
+ }
+
+ case CSN_NEXT_EXIST:
+ {
+ guint8 fExist;
+
+ pui8 = pui8DATA(data, pDescr->offset);
+
+ /* this if-statement represents the M_NEXT_EXIST_OR_NULL description element */
+ if ((pDescr->may_be_null) && (remaining_bits_len == 0))
+ { /* no more bits to decode is fine here - end of message detected and allowed */
+
+ /* Skip i entries + this entry */
+ pDescr += pDescr->i + 1;
+
+ /* Set the data member to "not exist" */
+ *pui8 = 0;
+ break;
+ }
+
+ /* the "regular" M_NEXT_EXIST description element */
+
+ fExist = 0x00;
+ if (bitvec_read_field(vector, readIndex, 1))
+ {
+ fExist = 0x01;
+ }
+
+ *pui8 = fExist;
+ remaining_bits_len -= 1;
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , (unsigned)*pui8);
+ ++bit_offset;
+
+ if (fExist == 0)
+ { /* Skip 'i' entries */
+ pDescr += pDescr->i;
+ }
+
+ pDescr++;
+ break;
+ }
+
+ case CSN_NEXT_EXIST_LH:
+ {
+ guint8 fExist;
+ pui8 = pui8DATA(data, pDescr->offset);
+
+ /* this if-statement represents the M_NEXT_EXIST_OR_NULL_LH description element */
+ if ((pDescr->descr.ptr != NULL) && (remaining_bits_len == 0))
+ { /* no more bits to decode is fine here - end of message detected and allowed */
+
+ /* skip 'i' entries + this entry */
+ pDescr += pDescr->i + 1;
+
+ /* set the data member to "not exist" */
+ *pui8 = 0;
+ break;
+ }
+
+ /* the "regular" M_NEXT_EXIST_LH description element */
+ fExist = get_masked_bits8(vector, readIndex, bit_offset, 1);
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , (unsigned)fExist);
+ *pui8++ = fExist;
+ remaining_bits_len -= 1;
+
+ bit_offset++;
+
+ if (fExist == 0)
+ { /* Skip 'i' entries */
+ pDescr += pDescr->i;
+ }
+ pDescr++;
+
+ break;
+ }
+
+ case CSN_VARIABLE_BITMAP_1:
+ { /* Bitmap from here and to the end of message */
+
+ *pui8DATA(data, (gint16)pDescr->descr.value) = (guint8) remaining_bits_len; /* length of bitmap == remaining bits */
+
+ /*no break -
+ * with a length set we have a regular variable length bitmap so we continue */
+ }
+ /* FALL THROUGH */
+ case CSN_VARIABLE_BITMAP:
+ { /* {CSN_VARIABLE_BITMAP, 0, offsetof(_STRUCT, _ElementCountField), offsetof(_STRUCT, _MEMBER), #_MEMBER}
+ * <N: bit (5)> <bitmap: bit(N + offset)>
+ * Bit array with length (in bits) specified in parameter (pDescr->descr)
+ * The result is right aligned!
+ */
+ gint16 no_of_bits = *pui8DATA(data, (gint16)pDescr->descr.value);
+
+ no_of_bits += pDescr->i; /* adjusted by offset */
+
+ if (no_of_bits > 0)
+ {
+ remaining_bits_len -= no_of_bits;
+
+ if (remaining_bits_len < 0)
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_NEED_MORE_BITS_TO_UNPACK, pDescr);
+ }
+
+ { /* extract bits */
+ guint8* pui8 = pui8DATA(data, pDescr->offset);
+ gint16 nB1 = no_of_bits & 0x07;/* no_of_bits Mod 8 */
+
+ if (nB1 > 0)
+ { /* take care of the first byte - it will be right aligned */
+ *pui8 = bitvec_read_field(vector, readIndex, nB1);
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , (unsigned)*pui8);
+ pui8++;
+ no_of_bits -= nB1;
+ bit_offset += nB1; /* (nB1 is no_of_bits Mod 8) */
+ }
+
+ /* remaining no_of_bits is a multiple of 8 or 0 */
+ while (no_of_bits > 0)
+ {
+ *pui8 = bitvec_read_field(vector, readIndex, 8);
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , (unsigned)*pui8);
+ pui8++;
+ no_of_bits -= 8;
+ }
+ }
+ }
+ pDescr++;
+ break;
+ }
+
+ case CSN_LEFT_ALIGNED_VAR_BMP_1:
+ { /* Bitmap from here and to the end of message */
+
+ *pui8DATA(data, (gint16)pDescr->descr.value) = (guint8) remaining_bits_len; /* length of bitmap == remaining bits */
+
+ /* no break -
+ * with a length set we have a regular left aligned variable length bitmap so we continue
+ */
+ }
+ /* FALL THROUGH */
+ case CSN_LEFT_ALIGNED_VAR_BMP:
+ { /* {CSN_LEFT_ALIGNED_VAR_BMP, _OFFSET, (void*)offsetof(_STRUCT, _ElementCountField), offsetof(_STRUCT, _MEMBER), #_MEMBER}
+ * <N: bit (5)> <bitmap: bit(N + offset)>
+ * bit array with length (in bits) specified in parameter (pDescr->descr)
+ */
+ gint16 no_of_bits = *pui8DATA(data, (gint16)pDescr->descr.value);/* Size of bitmap */
+
+ no_of_bits += pDescr->i;/* size adjusted by offset */
+
+ if (no_of_bits > 0)
+ {
+ remaining_bits_len -= no_of_bits;
+
+ if (remaining_bits_len < 0)
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_NEED_MORE_BITS_TO_UNPACK, pDescr);
+ }
+
+ { /* extract bits */
+ guint8* pui8 = pui8DATA(data, pDescr->offset);
+
+ while (no_of_bits >= 8)
+ {
+ *pui8 = bitvec_read_field(vector, readIndex, 8);
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , (unsigned)*pui8);
+ pui8++;
+ no_of_bits -= 8;
+ }
+ if (no_of_bits > 0)
+ {
+ *pui8 = bitvec_read_field(vector, readIndex, no_of_bits);
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , (unsigned)*pui8);
+ pui8++;
+ bit_offset += no_of_bits;
+ no_of_bits = 0;
+ }
+ }
+ }
+
+ /* bitmap was successfully extracted or it was empty */
+ pDescr++;
+ break;
+ }
+
+ case CSN_PADDING_BITS:
+ { /* Padding from here and to the end of message */
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = ", pDescr->sz);
+ if (remaining_bits_len > 0)
+ {
+ while (remaining_bits_len > 0)
+ {
+ guint bits_to_handle = remaining_bits_len%8;
+ if (bits_to_handle > 0)
+ {
+ LOGPC(DCSN1, LOGL_DEBUG, "%d|", bitvec_get_uint(vector, bits_to_handle));
+ remaining_bits_len -= bits_to_handle;
+ bit_offset += bits_to_handle;
+ }
+ else if (bits_to_handle == 0)
+ {
+ LOGPC(DCSN1, LOGL_DEBUG, "%d|", bitvec_get_uint(vector, 8));
+ remaining_bits_len -= 8;
+ bit_offset += 8;
+ }
+ }
+ }
+ if (remaining_bits_len < 0)
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_NEED_MORE_BITS_TO_UNPACK, pDescr);
+ }
+
+ /* Padding was successfully extracted or it was empty */
+ pDescr++;
+ break;
+ }
+
+ case CSN_VARIABLE_ARRAY:
+ { /* {int type; int i; void* descr; int offset; const char* sz; } CSN_DESCR;
+ * {CSN_VARIABLE_ARRAY, _OFFSET, (void*)offsetof(_STRUCT, _ElementCountField), offsetof(_STRUCT, _MEMBER), #_MEMBER}
+ * Array with length specified in parameter:
+ * <count: bit (x)>
+ * <list: octet(count + offset)>
+ */
+ gint16 count = *pui8DATA(data, (gint16)pDescr->descr.value);
+
+ count += pDescr->i; /* Adjusted by offset */
+
+ if (count > 0)
+ {
+ remaining_bits_len -= count * 8;
+
+ if (remaining_bits_len < 0)
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_NEED_MORE_BITS_TO_UNPACK, pDescr);
+ }
+
+ pui8 = pui8DATA(data, pDescr->offset);
+
+ while (count > 0)
+ {
+ *pui8 = bitvec_read_field(vector, readIndex, 8);
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = 0x%x | ", pDescr->sz , (unsigned)*pui8);
+ pui8++;
+ bit_offset += 8;
+ count--;
+ }
+ }
+
+ pDescr++;
+ break;
+ }
+
+ case CSN_RECURSIVE_ARRAY:
+ { /* Recursive way to specify an array: <list> ::= {1 <number: bit (4)> <list> | 0}
+ * or more generally: <list> ::= { <tag> <element> <list> | <EndTag> }
+ * where <element> ::= bit(value)
+ * <tag> ::= 0 | 1
+ * <EndTag> ::= reversed tag i.e. tag == 1 -> EndTag == 0 and vice versa
+ * {CSN_RECURSIVE_ARRAY, _BITS, (void*)offsetof(_STRUCT, _ElementCountField), offsetof(_STRUCT, _MEMBER), #_MEMBER}
+ * REMARK: recursive way to specify an array but an iterative implementation!
+ */
+ gint16 no_of_bits = pDescr->i;
+ guint8 ElementCount = 0;
+
+ pui8 = pui8DATA(data, pDescr->offset);
+
+ while (existNextElement(vector, readIndex, Tag))
+ { /* tag control shows existence of next list elements */
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = Exist | ", pDescr->sz);
+ bit_offset++;
+ remaining_bits_len--;
+
+ /* extract and store no_of_bits long element from bitstream */
+ *pui8 = bitvec_read_field(vector, readIndex, no_of_bits);
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , (unsigned)*pui8);
+ pui8++;
+ remaining_bits_len -= no_of_bits;
+ ElementCount++;
+
+ if (remaining_bits_len < 0)
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_NEED_MORE_BITS_TO_UNPACK, pDescr);
+ }
+
+ bit_offset += no_of_bits;
+ }
+
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %d | ", pDescr->sz , bitvec_get_uint(vector, 1));
+ /* existNextElement() returned FALSE, 1 bit consumed */
+ bit_offset++;
+ remaining_bits_len--;
+
+ /* Store the counted number of elements of the array */
+ *pui8DATA(data, (gint16)pDescr->descr.value) = ElementCount;
+
+ pDescr++;
+ break;
+ }
+
+ case CSN_RECURSIVE_TARRAY:
+ { /* Recursive way to specify an array of type: <lists> ::= { 1 <type> } ** 0 ;
+ * M_REC_TARRAY(_STRUCT, _MEMBER, _MEMBER_TYPE, _ElementCountField)
+ * {t, offsetof(_STRUCT, _ElementCountField), (void*)CSNDESCR_##_MEMBER_TYPE, offsetof(_STRUCT, _MEMBER), #_MEMBER, (StreamSerializeFcn_t)sizeof(_MEMBER_TYPE), (void_fn_t)ElementsOf(((_STRUCT*)0)->_MEMBER)}
+ */
+ gint16 nSizeElement = (gint16)(gint32)pDescr->value;
+ guint32 nSizeArray = (guint32)((uintptr_t)pDescr->aux_fn);
+ guint8 ElementCount = 0;
+ pui8 = pui8DATA(data, pDescr->offset);
+
+ while (existNextElement(vector, readIndex, Tag))
+ { /* tag control shows existence of next list elements */
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = Exist | ", pDescr->sz);
+ /* existNextElement() returned TRUE, 1 bit consumed */
+ bit_offset++;
+ remaining_bits_len--;
+ ElementCount++;
+
+ if (ElementCount > nSizeArray)
+ {
+ LOGPC(DCSN1, LOGL_ERROR, "error: %s: too many elements (>%u) in recursive array. Increase its size! } |", pDescr->sz, nSizeArray);
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_STREAM_NOT_SUPPORTED, pDescr);
+ }
+
+ { /* unpack the following data structure */
+ csnStream_t arT = *ar;
+ gint16 Status;
+ csnStreamInit(&arT, bit_offset, remaining_bits_len);
+ Status = csnStreamDecoder(&arT, (const CSN_DESCR*)pDescr->descr.ptr, vector, readIndex, pui8);
+
+ if (Status >= 0)
+ { /* successful completion */
+ pui8 += nSizeElement; /* -> to next data element */
+ remaining_bits_len = arT.remaining_bits_len;
+ bit_offset = arT.bit_offset;
+ }
+ else
+ { /* something went awry */
+ return Status;
+ }
+ }
+
+ if (remaining_bits_len < 0)
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_NEED_MORE_BITS_TO_UNPACK, pDescr);
+ }
+ }
+
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %d | ", pDescr->sz , bitvec_get_uint(vector, 1));
+
+ /* existNextElement() returned FALSE, 1 bit consumed */
+ remaining_bits_len--;
+ bit_offset++;
+
+ /* Store the counted number of elements of the array */
+ *pui8DATA(data, (gint16)(gint32)pDescr->i) = ElementCount;
+
+ pDescr++;
+ break;
+ }
+
+ case CSN_RECURSIVE_TARRAY_2:
+ { /* Recursive way to specify an array of type: <list> ::= <type> { 0 <type> } ** 1 ; */
+
+ Tag = REVERSED_TAG;
+
+ /* NO break -
+ * handling is exactly the same as for CSN_RECURSIVE_TARRAY_1 so we continue
+ */
+ }
+ /* FALL THROUGH */
+ case CSN_RECURSIVE_TARRAY_1:
+ { /* Recursive way to specify an array of type: <lists> ::= <type> { 1 <type> } ** 0 ;
+ * M_REC_TARRAY(_STRUCT, _MEMBER, _MEMBER_TYPE, _ElementCountField)
+ * {t, offsetof(_STRUCT, _ElementCountField), (void*)CSNDESCR_##_MEMBER_TYPE, offsetof(_STRUCT, _MEMBER), #_MEMBER, (StreamSerializeFcn_t)sizeof(_MEMBER_TYPE), (void_fn_t)ElementsOf(((_STRUCT*)0)->_MEMBER)}
+ */
+ gint16 nSizeElement = (gint16)(gint32)pDescr->value;
+ guint32 nSizeArray = (guint32)((uintptr_t)pDescr->aux_fn);
+ guint8 ElementCount = 0;
+ csnStream_t arT = *ar;
+ gboolean EndOfList = FALSE;
+ gint16 Status;
+ pui8 = pui8DATA(data, pDescr->offset);
+
+ do
+ { /* get data element */
+ ElementCount++;
+
+ if (ElementCount > nSizeArray)
+ {
+ LOGPC(DCSN1, LOGL_ERROR, "error: %s: too many elements (>%u) in recursive array. Increase its size! } |", pDescr->sz, nSizeArray);
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_STREAM_NOT_SUPPORTED, pDescr);
+ }
+
+ LOGPC(DCSN1, LOGL_DEBUG, "%s { | ", pDescr->sz);
+
+ csnStreamInit(&arT, bit_offset, remaining_bits_len);
+ Status = csnStreamDecoder(&arT, (const CSN_DESCR*)pDescr->descr.ptr, vector, readIndex, pui8);
+
+ if (Status >= 0)
+ { /* successful completion */
+ pui8 += nSizeElement; /* -> to next */
+ remaining_bits_len = arT.remaining_bits_len;
+ bit_offset = arT.bit_offset;
+ }
+ else
+ { /* something went awry */
+ return Status;
+ }
+
+ if (remaining_bits_len < 0)
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_NEED_MORE_BITS_TO_UNPACK, pDescr);
+ }
+
+ /* control of next element's tag */
+ LOGPC(DCSN1, LOGL_DEBUG, "%s } | ", pDescr->sz);
+ EndOfList = !(existNextElement(vector, readIndex, Tag));
+
+ bit_offset++;
+ remaining_bits_len--; /* 1 bit consumed (tag) */
+ } while (!EndOfList);
+
+
+ /* Store the count of the array */
+ *pui8DATA(data, pDescr->i) = ElementCount;
+ Tag = STANDARD_TAG; /* in case it was set to "reversed" */
+ pDescr++;
+ break;
+ }
+
+ case CSN_FIXED:
+ { /* Verify the fixed bits */
+ guint8 no_of_bits = (guint8) pDescr->i;
+ guint32 ui32;
+
+ if (no_of_bits <= 32)
+ {
+ ui32 = bitvec_read_field(vector, readIndex, no_of_bits);
+ }
+ else
+ {
+ return ProcessError(readIndex,"no_of_bits > 32", -1, pDescr);
+ }
+ if (ui32 != (unsigned)(gint32)pDescr->offset)
+ {
+ return ProcessError(readIndex,"csnStreamDecoder FIXED value does not match", -1, pDescr);
+ }
+
+ LOGPC(DCSN1, LOGL_DEBUG, "%s = %u | ", pDescr->sz , (unsigned int)ui32);
+ remaining_bits_len -= no_of_bits;
+ bit_offset += no_of_bits;
+ pDescr++;
+ break;
+ }
+
+ case CSN_CALLBACK:
+ {
+ guint16 no_of_bits;
+ DissectorCallbackFcn_t callback = (DissectorCallbackFcn_t)pDescr->aux_fn;
+ LOGPC(DCSN1, LOGL_DEBUG, "CSN_CALLBACK(%s) | ", pDescr->sz);
+ no_of_bits = callback(vector, readIndex, pvDATA(data, pDescr->i), pvDATA(data, pDescr->offset));
+ remaining_bits_len -= no_of_bits;
+ bit_offset += no_of_bits;
+ pDescr++;
+ break;
+ }
+
+ case CSN_TRAP_ERROR:
+ {
+ return ProcessError(readIndex,"csnStreamDecoder", pDescr->i, pDescr);
+ }
+
+ case CSN_END:
+ {
+ ar->remaining_bits_len = remaining_bits_len;
+ ar->bit_offset = bit_offset;
+ return remaining_bits_len;
+ }
+
+ default:
+ {
+ assert(0);
+ }
+
+
+ }
+
+ } while (remaining_bits_len >= 0);
+
+ return ProcessError(readIndex,"csnStreamDecoder", CSN_ERROR_NEED_MORE_BITS_TO_UNPACK, pDescr);
+}