gprs-ns/test: Add test_sgsn_reset_invalid_state
This tests the behaviour for a certain combination of messages and
packet losses that can put the NS-VC object into an undefined state.
In that state, the peer's ALIVE messages are properly answered, but
the local test procedure has stopped, incoming unitdata PDUs are
answered by STATUS(NS-VC blocked) and the unblocking procedure is not
initiated.
Ticket: OW#1312
Sponsored-by: On-Waves ehf
diff --git a/tests/gb/gprs_ns_test.ok b/tests/gb/gprs_ns_test.ok
index 0d4b7fb..66b1dbb 100644
--- a/tests/gb/gprs_ns_test.ok
+++ b/tests/gb/gprs_ns_test.ok
@@ -722,6 +722,105 @@
Current NS-VCIs:
+=== test_sgsn_reset_invalid_state ===
+--- Setup SGSN connection, BSS -> SGSN ---
+
+MESSAGE to SGSN, msg length 12
+02 00 81 01 01 82 01 01 04 82 01 00
+
+PROCESSING RESET_ACK from 0x05060708:32000
+03 01 82 01 01 04 82 01 00
+
+MESSAGE to SGSN, msg length 1
+0a
+
+result (RESET_ACK) = 1
+
+PROCESSING ALIVE_ACK from 0x05060708:32000
+0b
+
+MESSAGE to SGSN, msg length 1
+06
+
+result (ALIVE_ACK) = 1
+
+PROCESSING UNBLOCK_ACK from 0x05060708:32000
+07
+
+==> got signal NS_UNBLOCK, NS-VC 0x0101/5.6.7.8:32000
+result (UNBLOCK_ACK) = 0
+
+Current NS-VCIs:
+ VCI 0x0101, NSEI 0x0100, peer 0x05060708:32000
+ NS-VC Block count : 1
+
+--- Time out local test procedure ---
+
+MESSAGE to SGSN, msg length 1
+0a
+
+MESSAGE to SGSN, msg length 1
+0a
+
+MESSAGE to SGSN, msg length 1
+0a
+
+MESSAGE to SGSN, msg length 1
+0a
+
+MESSAGE to SGSN, msg length 1
+0a
+
+MESSAGE to SGSN, msg length 1
+0a
+
+MESSAGE to SGSN, msg length 1
+0a
+
+MESSAGE to SGSN, msg length 1
+0a
+
+MESSAGE to SGSN, msg length 1
+0a
+
+MESSAGE to SGSN, msg length 1
+0a
+
+MESSAGE to SGSN, msg length 1
+0a
+
+==> got signal NS_ALIVE_EXP, NS-VC 0x0101/5.6.7.8:32000
+==> got signal NS_BLOCK, NS-VC 0x0101/5.6.7.8:32000
+--- Remote test procedure continues ---
+
+PROCESSING ALIVE from 0x05060708:32000
+0a
+
+MESSAGE to SGSN, msg length 12
+02 00 81 0a 01 82 01 01 04 82 01 00
+
+result (ALIVE) = 12
+
+--- Don't send a NS_RESET_ACK message (pretend it is lost) ---
+
+PROCESSING ALIVE from 0x05060708:32000
+0a
+
+MESSAGE to SGSN, msg length 1
+0b
+
+result (ALIVE) = 1
+
+PROCESSING UNITDATA from 0x05060708:32000
+00 00 12 34 01 02 03 04
+
+MESSAGE to SGSN, msg length 8
+08 00 81 03 01 82 01 01
+
+result (UNITDATA) = 8
+
+Current NS-VCIs:
+
--- Send message to SGSN ---
SENDING BSSGP RESET to NSEI 0x0100, BVCI 0x0000