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RLC AM Rx PDU Segment fixes

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This commit is contained in:
fnabet
2017-03-09 18:08:43 +01:00
parent 7f60e38fee
commit 0ce73b4d0e
1 changed files with 70 additions and 27 deletions
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openair2/LAYER2/RLC/AM_v9.3.0/rlc_am_rx_list.c
+70 -27
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@@ -298,9 +298,7 @@ rlc_am_rx_pdu_status_t rlc_am_rx_list_handle_pdu_segment(
/*****************************************************/
// 1) Find previous cursor to the PDU to insert
/*****************************************************/
previous_cursor_p = cursor_p;
pdu_info_cursor_p = &((rlc_am_rx_pdu_management_t*)(cursor_p->data))->pdu_info;
pdu_info_previous_cursor_p = pdu_info_cursor_p;
while (cursor_p != NULL) {
pdu_info_cursor_p = &((rlc_am_rx_pdu_management_t*)(cursor_p->data))->pdu_info;
@@ -320,11 +318,10 @@ rlc_am_rx_pdu_status_t rlc_am_rx_list_handle_pdu_segment(
// First case : cursor_p is NULL or its SN is different from the received one, it means the SN is received for the first time
// Insert PDU after previous_cursor_p
if ((cursor_p == NULL) || (pdu_info_cursor_p->sn != pdu_rx_info_p->sn)) {
rlc_usn_t sn_prev = pdu_info_previous_cursor_p->sn;
if (RLC_AM_DIFF_SN(sn_prev,rlc_pP->vr_r) < RLC_AM_DIFF_SN(pdu_rx_info_p->sn,rlc_pP->vr_r)) {
if (previous_cursor_p != NULL) {
LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[PROCESS RX PDU SEGMENT SN=%d] PDU SEGMENT INSERTED AFTER PDU SN=%d\n",
PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),pdu_rx_info_p->sn,
sn_prev);
pdu_info_previous_cursor_p->sn);
list2_insert_after_element(tb_pP, previous_cursor_p, &rlc_pP->receiver_buffer);
}
else { /* SN of head of Rx PDU list is higher than received PDU SN */
@@ -337,6 +334,7 @@ rlc_am_rx_pdu_status_t rlc_am_rx_list_handle_pdu_segment(
return RLC_AM_DATA_PDU_STATUS_OK;
}
/* Now handle case cursor->sn = received SN */
// Filter out SN duplicate
rlc_am_rx_pdu_management_t * pdu_cursor_mgnt_p = (rlc_am_rx_pdu_management_t *) (cursor_p->data);
@@ -362,29 +360,29 @@ rlc_am_rx_pdu_status_t rlc_am_rx_list_handle_pdu_segment(
}
/* if not previously inserted, it will be put after the last segment if it was not LSF*/
if ((!prev_segment_found) && (pdu_info_previous_cursor_p->lsf == 0)) {
prev_segment_found = TRUE;
next_segment_found = TRUE; // no more segment after the PDU
next_cursor_p = cursor_p;
AssertFatal(previous_cursor_p->next == next_cursor_p,"AM Rx PDU Segment store at the end error, SN=%d \n",pdu_rx_info_p->sn);
if (!prev_segment_found) {
if (pdu_info_previous_cursor_p->lsf == 0) {
prev_segment_found = TRUE;
next_segment_found = TRUE; // no more segment after the PDU
next_cursor_p = cursor_p;
AssertFatal(previous_cursor_p->next == next_cursor_p,"AM Rx PDU Segment store at the end error, SN=%d \n",pdu_rx_info_p->sn);
}
else
{
// the segment is duplicate
return RLC_AM_DATA_PDU_STATUS_AM_SEGMENT_DUPLICATE;
}
}
else
{
// the segment is duplicate
return RLC_AM_DATA_PDU_STATUS_AM_SEGMENT_DUPLICATE;
}
// Check that the Segment is not duplicate by scanning stored contiguous segments from previous_cursor_p
pdu_info_previous_cursor_p = &((rlc_am_rx_pdu_management_t*)(previous_cursor_p->data))->pdu_info;
if ((previous_cursor_p != NULL) && (pdu_info_previous_cursor_p->sn == pdu_rx_info_p->sn)) {
so_start = pdu_info_previous_cursor_p->so;
so_end = pdu_info_previous_cursor_p->so + pdu_info_previous_cursor_p->payload_size - 1;
cursor_p = previous_cursor_p;
pdu_info_cursor_p = &((rlc_am_rx_pdu_management_t*)(cursor_p->data))->pdu_info;
cursor_p = cursor_p->next;
pdu_info_cursor_p = pdu_info_previous_cursor_p;
cursor_p = previous_cursor_p->next;
rlc_am_pdu_info_t* pdu_info_cursor_next_p = NULL;
if (cursor_p != NULL) {
pdu_info_cursor_next_p = &((rlc_am_rx_pdu_management_t*)(cursor_p->data))->pdu_info;
@@ -403,7 +401,7 @@ rlc_am_rx_pdu_status_t rlc_am_rx_list_handle_pdu_segment(
/* Now discard the PDU segment if it is within so_start so_end */
if ((so_start <= so_start_segment) && (so_end_segment <= so_end)) {
LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[PROCESS RX PDU SEGMENT] DISCARD : DUPLICATE SEGMENT SN=%d\n",
PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),pdu_rx_info_p->sn);
PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),pdu_rx_info_p->sn);
return RLC_AM_DATA_PDU_STATUS_AM_SEGMENT_DUPLICATE;
}
}
@@ -411,8 +409,37 @@ rlc_am_rx_pdu_status_t rlc_am_rx_list_handle_pdu_segment(
// Now found the segment which will be right after the pdu to insert
if (!next_segment_found) {
/* special case if SN=vrR and some segments have been previously reassembled and not yet discarded */
/* update previous_cursor_p up to the last reassembled Segment */
if ((previous_cursor_p != NULL) && (pdu_rx_info_p->sn == rlc_pP->vr_r)) {
if (((rlc_am_rx_pdu_management_t*)(previous_cursor_p->data))->segment_reassembled == RLC_AM_RX_PDU_SEGMENT_REASSEMBLED) {
pdu_info_previous_cursor_p = &((rlc_am_rx_pdu_management_t*)(previous_cursor_p->data))->pdu_info;
so_end = pdu_info_previous_cursor_p->so + pdu_info_previous_cursor_p->payload_size;
cursor_p = previous_cursor_p->next;
if (cursor_p != NULL) {
pdu_info_cursor_p = &((rlc_am_rx_pdu_management_t*)(cursor_p->data))->pdu_info;
}
while ((cursor_p != NULL) && (pdu_info_cursor_p->sn == pdu_rx_info_p->sn) &&
(((rlc_am_rx_pdu_management_t*)(cursor_p->data))->segment_reassembled == RLC_AM_RX_PDU_SEGMENT_REASSEMBLED)) {
AssertFatal(pdu_info_cursor_p->so == so_end,"AM Rx PDU Segment store contiguous reassembled error, SN=%d \n",pdu_rx_info_p->sn);
so_end += pdu_info_cursor_p->payload_size;
previous_cursor_p = cursor_p;
cursor_p = cursor_p->next;
if (cursor_p != NULL) {
pdu_info_cursor_p = &((rlc_am_rx_pdu_management_t*)(cursor_p->data))->pdu_info;
}
}
}
}
if (previous_cursor_p != NULL) {
cursor_p = previous_cursor_p->next;
}
else {
cursor_p = rlc_pP->receiver_buffer.head;
}
cursor_p = previous_cursor_p->next;
next_cursor_p = cursor_p;
if (next_cursor_p != NULL) {
pdu_info_cursor_p = &((rlc_am_rx_pdu_management_t*)(next_cursor_p->data))->pdu_info;
@@ -435,10 +462,13 @@ rlc_am_rx_pdu_status_t rlc_am_rx_list_handle_pdu_segment(
/* Now remove duplicate bytes */
// remove duplicate at the begining, only valid if the segment is to be inserted after a PDU segment of the same SN
pdu_info_previous_cursor_p = &((rlc_am_rx_pdu_management_t*)(previous_cursor_p->data))->pdu_info;
if (pdu_info_previous_cursor_p->sn == pdu_rx_info_p->sn) {
so_start_segment += (pdu_info_previous_cursor_p->so + pdu_info_previous_cursor_p->payload_size - pdu_rx_info_p->so);
if (previous_cursor_p != NULL) {
pdu_info_previous_cursor_p = &((rlc_am_rx_pdu_management_t*)(previous_cursor_p->data))->pdu_info;
if (pdu_info_previous_cursor_p->sn == pdu_rx_info_p->sn) {
so_start_segment += (pdu_info_previous_cursor_p->so + pdu_info_previous_cursor_p->payload_size - pdu_rx_info_p->so);
}
}
// remove duplicate at the end
if (next_cursor_p != NULL) {
pdu_info_cursor_p = &((rlc_am_rx_pdu_management_t*)(next_cursor_p->data))->pdu_info;
@@ -448,6 +478,7 @@ rlc_am_rx_pdu_status_t rlc_am_rx_list_handle_pdu_segment(
}
}
AssertFatal((so_start_segment <= so_end_segment) && (pdu_rx_info_p->so <= so_start_segment) &&
(so_end_segment <= pdu_rx_info_p->so + pdu_rx_info_p->payload_size - 1),
" AM RX PDU Segment Duplicate elimination error OldSOStart=%d OldSOEnd=%d newSOStart=%d newSOEnd =%d SN=%d\n",
@@ -462,7 +493,13 @@ rlc_am_rx_pdu_status_t rlc_am_rx_list_handle_pdu_segment(
LOG_D(RLC, PROTOCOL_RLC_AM_CTXT_FMT"[PROCESS RX PDU SEGMENT] CREATE SEGMENT FROM SEGMENT OFFSET=%d DATA LENGTH=%d SN=%d\n",
PROTOCOL_RLC_AM_CTXT_ARGS(ctxt_pP,rlc_pP),so_start_segment - pdu_rx_info_p->so,so_end_segment - so_start_segment + 1,pdu_rx_info_p->sn);
list2_insert_after_element(trunc_segment, previous_cursor_p, &rlc_pP->receiver_buffer);
if (previous_cursor_p != NULL) {
list2_insert_after_element(trunc_segment, previous_cursor_p, &rlc_pP->receiver_buffer);
}
else {
list2_insert_before_element(trunc_segment, rlc_pP->receiver_buffer.head, &rlc_pP->receiver_buffer);
}
/* Free original PDU Segment */
free_mem_block(tb_pP, __func__);
@@ -474,7 +511,13 @@ rlc_am_rx_pdu_status_t rlc_am_rx_list_handle_pdu_segment(
}
else
{
list2_insert_after_element(tb_pP, previous_cursor_p, &rlc_pP->receiver_buffer);
if (previous_cursor_p != NULL) {
list2_insert_after_element(tb_pP, previous_cursor_p, &rlc_pP->receiver_buffer);
}
else {
list2_insert_before_element(tb_pP, rlc_pP->receiver_buffer.head, &rlc_pP->receiver_buffer);
}
return RLC_AM_DATA_PDU_STATUS_OK;
}
}