diff options
| -rw-r--r-- | epan/dissectors/packet-rlc-lte.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/epan/dissectors/packet-rlc-lte.c b/epan/dissectors/packet-rlc-lte.c index e31b9007dc..0ba1291ba8 100644 --- a/epan/dissectors/packet-rlc-lte.c +++ b/epan/dissectors/packet-rlc-lte.c @@ -2143,6 +2143,12 @@ static void dissect_rlc_lte_am_status_pdu(tvbuff_t *tvb, ack_sn); } + /* NACK should always be 'behind' the ACK */ + if ((1024 + ack_sn - nack_sn) % 1024 > 512) { + expert_add_info_format(pinfo, nack_ti, PI_MALFORMED, PI_ERROR, + "NACK must not be ahead of ACK in status PDU"); + } + /* Copy into struct, but don't exceed buffer */ if (nack_count < MAX_NACKs) { tap_info->NACKs[nack_count++] = (guint16)nack_sn; |