nr pdcp: bugfix: bad HFN computation at PDU reception

b5ea2183 · Cedric Roux · c7ce307d · b5ea2183
Commit b5ea2183 authored May 22, 2021 by Cedric Roux
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openair2/LAYER2/nr_pdcp/nr_pdcp_entity.c openair2/LAYER2/nr_pdcp/nr_pdcp_entity.c +1 -1

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--- a/openair2/LAYER2/nr_pdcp/nr_pdcp_entity.c
+++ b/openair2/LAYER2/nr_pdcp/nr_pdcp_entity.c
@@ -79,7 +79,7 @@ static void nr_pdcp_entity_recv_pdu(nr_pdcp_entity_t *entity,
  }

  rx_deliv_sn  = entity->rx_deliv & entity->sn_max;
-  rx_deliv_hfn = (entity->rx_deliv >> entity->sn_size) & ~entity->sn_max;
+  rx_deliv_hfn = entity->rx_deliv >> entity->sn_size;

  if (rcvd_sn < rx_deliv_sn - entity->window_size) {
    rcvd_hfn = rx_deliv_hfn + 1;