gb: Add test cases for NS RESET procedures
Add a test handling proper and mismatching RESETs. The latter may
occur, when ports change within a NS-VC without the SGSN getting
notice.
This tests for the behavior of the NS protocol stack for RESET and
RESET_ACK messages which changing/invalid NSEI and NSVCI like it is
being described in 3GPP TS 08.16, 7.3.1.
Sponsored-by: On-Waves ehf
diff --git a/tests/gb/gprs_ns_test.c b/tests/gb/gprs_ns_test.c
index 74eb701..3d0293e 100644
--- a/tests/gb/gprs_ns_test.c
+++ b/tests/gb/gprs_ns_test.c
@@ -533,6 +533,217 @@
nsi = NULL;
}
+static void test_bss_reset_ack()
+{
+ struct gprs_ns_inst *nsi = gprs_ns_instantiate(gprs_ns_callback, NULL);
+ struct sockaddr_in peer[4] = {{0},};
+ struct gprs_nsvc *nsvc;
+ struct sockaddr_in *nse[4];
+ int rc;
+
+ peer[0].sin_family = AF_INET;
+ peer[0].sin_port = htons(1111);
+ peer[0].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR);
+ peer[1].sin_family = AF_INET;
+ peer[1].sin_port = htons(2222);
+ peer[1].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR);
+ peer[2].sin_family = AF_INET;
+ peer[2].sin_port = htons(3333);
+ peer[2].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR);
+ peer[3].sin_family = AF_INET;
+ peer[3].sin_port = htons(4444);
+ peer[3].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR);
+
+ nse[0] = &peer[0];
+ nse[1] = &peer[1];
+
+ printf("--- Setup VC 1 BSS -> SGSN ---\n\n");
+
+ setup_ns(nsi, nse[0], 0x1001, 0x1000);
+ gprs_dump_nsi(nsi);
+
+ printf("--- Setup VC 2 BSS -> SGSN ---\n\n");
+
+ setup_ns(nsi, nse[1], 0x2001, 0x2000);
+ gprs_dump_nsi(nsi);
+
+ printf("--- Setup VC 1 SGSN -> BSS ---\n\n");
+
+ nsvc = gprs_nsvc_by_nsvci(nsi, 0x1001);
+ gprs_ns_tx_reset(nsvc, NS_CAUSE_OM_INTERVENTION);
+ send_ns_reset_ack(nsi, nse[0], 0x1001, 0x1000);
+ gprs_dump_nsi(nsi);
+
+ printf("--- Exchange NSEI 1 + 2 links ---\n\n");
+
+ nse[1] = &peer[0];
+ nse[0] = &peer[1];
+
+ printf("--- Setup VC 2 SGSN -> BSS (hits NSEI 1) ---\n\n");
+
+ nsvc = gprs_nsvc_by_nsvci(nsi, 0x2001);
+ gprs_ns_tx_reset(nsvc, NS_CAUSE_OM_INTERVENTION);
+ send_ns_reset_ack(nsi, nse[0], 0x1001, 0x1000);
+ gprs_dump_nsi(nsi);
+
+ printf("--- Setup VC 2 SGSN -> BSS (hits NSEI 2) ---\n\n");
+
+ nsvc = gprs_nsvc_by_nsvci(nsi, 0x2001);
+ rc = gprs_ns_tx_reset(nsvc, NS_CAUSE_OM_INTERVENTION);
+ if (rc < 0)
+ printf("Failed to send RESET to %s\n\n", gprs_ns_ll_str(nsvc));
+ else {
+ send_ns_reset_ack(nsi, nse[1], 0x2001, 0x2000);
+ gprs_dump_nsi(nsi);
+ }
+
+ printf("--- Setup VC 1 SGSN -> BSS (hits NSEI 1) ---\n\n");
+
+ nsvc = gprs_nsvc_by_nsvci(nsi, 0x1001);
+ gprs_ns_tx_reset(nsvc, NS_CAUSE_OM_INTERVENTION);
+ send_ns_reset_ack(nsi, nse[0], 0x1001, 0x1000);
+ gprs_dump_nsi(nsi);
+
+ printf("--- Setup VC 2 BSS -> SGSN ---\n\n");
+
+ setup_ns(nsi, nse[1], 0x2001, 0x2000);
+ gprs_dump_nsi(nsi);
+
+ /* Test 3GPP TS 08.16, 7.3.1, 3rd paragraph. */
+ /* This is not rejected because the NSEI has been
+ * assigned dynamically and not by configuration.
+ * This is not strictly spec conformant. */
+
+ printf("--- RESET with invalid NSEI, BSS -> SGSN ---\n\n");
+
+ send_ns_reset(nsi, nse[0], NS_CAUSE_OM_INTERVENTION,
+ 0x1001, 0xf000);
+ gprs_dump_nsi(nsi);
+
+ /* Test 3GPP TS 08.16, 7.3.1, 2nd paragraph. */
+ /* This is not rejected because the NSEI has been
+ * assigned dynamically and not by configuration.
+ * This is not strictly spec conformant. */
+
+ printf("--- RESET with invalid NSVCI, BSS -> SGSN ---\n\n");
+
+ send_ns_reset(nsi, nse[0], NS_CAUSE_OM_INTERVENTION,
+ 0xf001, 0x1000);
+ gprs_dump_nsi(nsi);
+
+ printf("--- RESET with old NSEI, NSVCI, BSS -> SGSN ---\n\n");
+
+ send_ns_reset(nsi, nse[0], NS_CAUSE_OM_INTERVENTION,
+ 0x1001, 0x1000);
+ gprs_dump_nsi(nsi);
+
+ /* Test 3GPP TS 08.16, 7.3.1, 5th paragraph. */
+
+ printf("--- Unexpected RESET_ACK VC 1, BSS -> SGSN ---\n\n");
+
+ send_ns_reset_ack(nsi, nse[0], 0x1001, 0x1000);
+ gprs_dump_nsi(nsi);
+
+ /* Test 3GPP TS 08.16, 7.3.1, 4th paragraph. */
+
+ printf("--- RESET_ACK with invalid NSEI, BSS -> SGSN ---\n\n");
+
+ nsvc = gprs_nsvc_by_nsvci(nsi, 0x1001);
+ gprs_ns_tx_reset(nsvc, NS_CAUSE_OM_INTERVENTION);
+ send_ns_reset_ack(nsi, nse[0], 0x1001, 0xf000);
+ gprs_dump_nsi(nsi);
+
+ /* Test 3GPP TS 08.16, 7.3.1, 4th paragraph. */
+
+ printf("--- RESET_ACK with invalid NSVCI, BSS -> SGSN ---\n\n");
+
+ nsvc = gprs_nsvc_by_nsvci(nsi, 0x1001);
+ gprs_ns_tx_reset(nsvc, NS_CAUSE_OM_INTERVENTION);
+ send_ns_reset_ack(nsi, nse[0], 0xf001, 0x1000);
+ gprs_dump_nsi(nsi);
+
+ gprs_ns_destroy(nsi);
+ nsi = NULL;
+}
+
+
+static void test_sgsn_reset()
+{
+ struct gprs_ns_inst *nsi = gprs_ns_instantiate(gprs_ns_callback, NULL);
+ struct sockaddr_in sgsn_peer= {0};
+ struct gprs_nsvc *nsvc;
+
+ 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("--- Setup SGSN connection, BSS -> SGSN ---\n\n");
+
+ gprs_ns_nsip_connect(nsi, &sgsn_peer, SGSN_NSEI, SGSN_NSEI+1);
+ send_ns_reset_ack(nsi, &sgsn_peer, SGSN_NSEI+1, SGSN_NSEI);
+ send_ns_alive_ack(nsi, &sgsn_peer);
+ send_ns_unblock_ack(nsi, &sgsn_peer);
+ gprs_dump_nsi(nsi);
+
+ printf("--- RESET, SGSN -> BSS ---\n\n");
+
+ send_ns_reset(nsi, &sgsn_peer, NS_CAUSE_OM_INTERVENTION,
+ SGSN_NSEI+1, SGSN_NSEI);
+ gprs_dump_nsi(nsi);
+
+ /* Test 3GPP TS 08.16, 7.3.1, 3rd paragraph. */
+
+ printf("--- RESET with invalid NSEI, SGSN -> BSS ---\n\n");
+
+ send_ns_reset(nsi, &sgsn_peer, NS_CAUSE_OM_INTERVENTION,
+ SGSN_NSEI+1, 0xf000);
+ gprs_dump_nsi(nsi);
+
+ /* Test 3GPP TS 08.16, 7.3.1, 2nd paragraph. */
+
+ printf("--- RESET with invalid NSVCI, SGSN -> BSS ---\n\n");
+
+ send_ns_reset(nsi, &sgsn_peer, NS_CAUSE_OM_INTERVENTION,
+ 0xf001, SGSN_NSEI);
+ gprs_dump_nsi(nsi);
+
+ printf("--- RESET, SGSN -> BSS ---\n\n");
+
+ send_ns_reset(nsi, &sgsn_peer, NS_CAUSE_OM_INTERVENTION,
+ SGSN_NSEI+1, SGSN_NSEI);
+ gprs_dump_nsi(nsi);
+
+ /* Test 3GPP TS 08.16, 7.3.1, 5th paragraph. */
+
+ printf("--- Unexpected RESET_ACK VC 1, BSS -> SGSN ---\n\n");
+
+ send_ns_reset_ack(nsi, &sgsn_peer, SGSN_NSEI+1, SGSN_NSEI);
+ gprs_dump_nsi(nsi);
+
+ /* Test 3GPP TS 08.16, 7.3.1, 4th paragraph. */
+
+ printf("--- RESET_ACK with invalid NSEI, BSS -> SGSN ---\n\n");
+
+ nsvc = gprs_nsvc_by_nsvci(nsi, SGSN_NSEI+1);
+ gprs_ns_tx_reset(nsvc, NS_CAUSE_OM_INTERVENTION);
+ send_ns_reset_ack(nsi, &sgsn_peer, SGSN_NSEI+1, 0xe000);
+ gprs_dump_nsi(nsi);
+
+ /* Test 3GPP TS 08.16, 7.3.1, 4th paragraph. */
+
+ printf("--- RESET_ACK with invalid NSVCI, BSS -> SGSN ---\n\n");
+
+ nsvc = gprs_nsvc_by_nsvci(nsi, SGSN_NSEI+1);
+ gprs_ns_tx_reset(nsvc, NS_CAUSE_OM_INTERVENTION);
+ send_ns_reset_ack(nsi, &sgsn_peer, 0xe001, SGSN_NSEI);
+ gprs_dump_nsi(nsi);
+
+
+ gprs_ns_destroy(nsi);
+ nsi = NULL;
+}
static void test_sgsn_output()
{
@@ -607,9 +818,16 @@
log_set_print_filename(osmo_stderr_target, 0);
osmo_signal_register_handler(SS_L_NS, &test_signal, NULL);
+ log_set_print_filename(osmo_stderr_target, 0);
+ log_set_log_level(osmo_stderr_target, LOGL_INFO);
+
+ setlinebuf(stdout);
+
printf("===== NS protocol test START\n");
test_nsvc();
test_bss_port_changes();
+ test_bss_reset_ack();
+ test_sgsn_reset();
test_sgsn_output();
printf("===== NS protocol test END\n\n");