Fix: Be sure to check if the PACKET DOWNLINK ACK belongs to the polled MS
diff --git a/src/gprs_rlcmac_data.cpp b/src/gprs_rlcmac_data.cpp
index 776c416..c52af14 100644
--- a/src/gprs_rlcmac_data.cpp
+++ b/src/gprs_rlcmac_data.cpp
@@ -365,14 +365,20 @@
tbf = tbf_by_poll_fn(fn, trx, ts);
if (!tbf) {
LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with "
- "unknown FN=%u TBF=%d (TRX %d TS %d)\n",
+ "unknown FN=%u TFI=%d (TRX %d TS %d)\n",
fn, tfi, trx, ts);
break;
}
+ if (tbf->tfi != tfi) {
+ LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with "
+ "wrong TFI=%d, ignoring!\n", tfi);
+ break;
+ }
tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_DL_ACK);
if ((tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK))) {
tbf->state_flags &= ~(1 << GPRS_RLCMAC_FLAG_TO_DL_ACK);
- LOGP(DRLCMAC, LOGL_NOTICE, "Recovered downlink ack\n");
+ LOGP(DRLCMAC, LOGL_NOTICE, "Recovered downlink ack "
+ "for DL TBF=%d\n", tbf->tfi);
}
/* reset N3105 */
tbf->n3105 = 0;