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lib,rlc_am_nr: consider SDU under segmentation in buffer state

This commit is contained in:
Robert Falkenberg 2022-04-22 07:46:19 +02:00
parent e0acb7b81c
commit ced6cf6e40
1 changed files with 30 additions and 1 deletions
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31
lib/src/rlc/rlc_am_nr.cc
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@ -988,7 +988,36 @@ void rlc_am_nr_tx::get_buffer_state(uint32_t& n_bytes_new, uint32_t& n_bytes_pri
}
}
// Bytes needed for tx SDUs
// Bytes needed for tx of the rest of the SDU that is currently under segmentation (if any)
if (sdu_under_segmentation_sn != INVALID_RLC_SN) {
if (tx_window->has_sn(sdu_under_segmentation_sn)) {
rlc_amd_tx_pdu_nr& seg_pdu = (*tx_window)[sdu_under_segmentation_sn];
if (not seg_pdu.segment_list.empty()) {
// obtain amount of already transmitted Bytes
const rlc_amd_tx_pdu_nr::pdu_segment& seg = seg_pdu.segment_list.back();
uint32_t last_byte = seg.so + seg.payload_len;
if (last_byte <= seg_pdu.sdu_buf->N_bytes) {
// compute remaining bytes pending for transmission
uint32_t remaining_bytes = seg_pdu.sdu_buf->N_bytes - last_byte;
n_bytes_new += remaining_bytes + max_hdr_size;
} else {
RlcError(
"buffer state - last segment of SDU under segmentation exceeds SDU len. SDU len=%d B, last_byte=%d B",
seg_pdu.sdu_buf->N_bytes,
last_byte);
}
} else {
RlcError("buffer state - SDU under segmentation has empty segment list. Ignoring SN=%d",
sdu_under_segmentation_sn);
}
} else {
sdu_under_segmentation_sn = INVALID_RLC_SN;
RlcError("buffer state - SDU under segmentation does not exist in tx_window. Aborting segmentation SN=%d",
sdu_under_segmentation_sn);
}
}
// Bytes needed for tx SDUs in queue
uint32_t n_sdus = tx_sdu_queue.get_n_sdus();
n_bytes_new += tx_sdu_queue.size_bytes();