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
This commit is contained in:
Jacob Erlbeck 2014-10-07 14:07:39 +02:00 committed by Holger Hans Peter Freyther
parent f1bcbb0f8a
commit cdb85f58c5
2 changed files with 163 additions and 0 deletions

View File

@ -791,6 +791,69 @@ static void test_sgsn_reset()
nsi = NULL;
}
static void test_sgsn_reset_invalid_state()
{
struct gprs_ns_inst *nsi = gprs_ns_instantiate(gprs_ns_callback, NULL);
struct sockaddr_in sgsn_peer= {0};
struct gprs_nsvc *nsvc;
int retry;
uint8_t dummy_sdu[] = {0x01, 0x02, 0x03, 0x04};
sgsn_peer.sin_family = AF_INET;
sgsn_peer.sin_port = htons(32000);
sgsn_peer.sin_addr.s_addr = htonl(REMOTE_SGSN_ADDR);
gprs_dump_nsi(nsi);
printf("=== %s ===\n", __func__);
printf("--- Setup SGSN connection, BSS -> SGSN ---\n\n");
gprs_ns_nsip_connect(nsi, &sgsn_peer, SGSN_NSEI, SGSN_NSEI+1);
OSMO_ASSERT(sent_pdu_type == NS_PDUT_RESET);
send_ns_reset_ack(nsi, &sgsn_peer, SGSN_NSEI+1, SGSN_NSEI);
OSMO_ASSERT(sent_pdu_type == NS_PDUT_ALIVE);
send_ns_alive_ack(nsi, &sgsn_peer);
OSMO_ASSERT(sent_pdu_type == NS_PDUT_UNBLOCK);
send_ns_unblock_ack(nsi, &sgsn_peer);
gprs_dump_nsi(nsi);
nsvc = gprs_nsvc_by_nsvci(nsi, SGSN_NSEI+1);
OSMO_ASSERT(nsvc->state == NSE_S_ALIVE);
OSMO_ASSERT(nsvc->remote_state == NSE_S_ALIVE);
printf("--- Time out local test procedure ---\n\n");
OSMO_ASSERT(expire_nsvc_timer(nsvc) == NSVC_TIMER_TNS_TEST);
OSMO_ASSERT(expire_nsvc_timer(nsvc) == NSVC_TIMER_TNS_ALIVE);
for (retry = 1; retry <= nsi->timeout[NS_TOUT_TNS_ALIVE_RETRIES]; ++retry)
OSMO_ASSERT(expire_nsvc_timer(nsvc) == NSVC_TIMER_TNS_ALIVE);
OSMO_ASSERT(nsvc->state == NSE_S_BLOCKED);
printf("--- Remote test procedure continues ---\n\n");
send_ns_alive(nsi, &sgsn_peer);
OSMO_ASSERT(sent_pdu_type == NS_PDUT_RESET);
printf("--- Don't send a NS_RESET_ACK message (pretend it is lost) ---\n\n");
sent_pdu_type = -1;
send_ns_alive(nsi, &sgsn_peer);
/* Disabled, since it is not yet fixed
OSMO_ASSERT(sent_pdu_type == -1);
send_ns_reset_ack(nsi, &sgsn_peer, SGSN_NSEI+1, SGSN_NSEI);
OSMO_ASSERT(sent_pdu_type == NS_PDUT_ALIVE);
send_ns_alive_ack(nsi, &sgsn_peer);
OSMO_ASSERT(sent_pdu_type == NS_PDUT_UNBLOCK);
send_ns_unblock_ack(nsi, &sgsn_peer);
*/
send_ns_unitdata(nsi, &sgsn_peer, 0x1234, dummy_sdu, sizeof(dummy_sdu));
gprs_ns_destroy(nsi);
nsi = NULL;
}
static void test_sgsn_output()
{
struct gprs_ns_inst *nsi = gprs_ns_instantiate(gprs_ns_callback, NULL);
@ -875,6 +938,7 @@ int main(int argc, char **argv)
test_bss_port_changes();
test_bss_reset_ack();
test_sgsn_reset();
test_sgsn_reset_invalid_state();
test_sgsn_output();
printf("===== NS protocol test END\n\n");

View File

@ -722,6 +722,105 @@ Current NS-VCIs:
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