ns2: don't forward an invalid RESET PDU to the FSM
When receiving an invalid RESET (e.g. wrong NSEI or NSVCI) do not
forward the PDU to the NSVC fsm. Answer it with correct NSEI & NSVCI,
log the PDU, then ignore it.
Fixes: OS#5258
Change-Id: I6e562def9c5a1e4534d42884215272b1e66d26c2
diff --git a/src/gb/gprs_ns2_vc_fsm.c b/src/gb/gprs_ns2_vc_fsm.c
index 726fc0c..d28897e 100644
--- a/src/gb/gprs_ns2_vc_fsm.c
+++ b/src/gb/gprs_ns2_vc_fsm.c
@@ -887,6 +887,8 @@
/* 48.016 § 7.3.1 send RESET_ACK to wrong NSVCI + ignore */
if (nsh->pdu_type == NS_PDUT_RESET) {
ns2_tx_reset_ack(nsvc);
+ LOG_NS_SIGNAL(nsvc, "Rx", nsh->pdu_type, LOGL_ERROR, " with wrong NSVCI (exp: %05u, got %05u). Ignoring PDU.\n", nsvc->nsvci, nsvci);
+ goto out;
} else if (nsh->pdu_type == NS_PDUT_STATUS) {
/* this is a PDU received over a NSVC and reports a status for another NSVC */
target_nsvc = gprs_ns2_nsvc_by_nsvci(nsvc->nse->nsi, nsvci);