gbproxy/test: Test IMSI acquisition for RA UDP REQ
When a MS is state GMM_REGISTERED enters a new RA, it sends a RA
Update Request which is then handled by a gbproxy that possibly
doesn't have a matching tlli_info. In this case, depending on the
configuration an identification procedure to acquire the IMSI must be
started.
This adds tests to test_gbproxy_imsi_acquisition():
- IMSI acquisition triggered by a RA Update Request message
- Reaction to repeated RA Update Request messages, like it could be
caused by packet loss between PCU and gbproxy.
Sponsored-by: On-Waves ehf
diff --git a/openbsc/tests/gbproxy/gbproxy_test.c b/openbsc/tests/gbproxy/gbproxy_test.c
index 7640279..80bf905 100644
--- a/openbsc/tests/gbproxy/gbproxy_test.c
+++ b/openbsc/tests/gbproxy/gbproxy_test.c
@@ -2203,6 +2203,7 @@
const uint32_t sgsn_ptmsi = 0xefe2b700;
const uint32_t local_sgsn_tlli = 0xefe2b700;
const uint32_t random_sgsn_tlli = 0x7c69fb81;
+ const uint32_t random_sgsn_tlli2 = 0x7eb52dfb;
const uint32_t bss_ptmsi = 0xc00f7304;
const uint32_t local_bss_tlli = 0xc00f7304;
@@ -2404,6 +2405,43 @@
dump_peers(stdout, 0, 0, &gbcfg);
+ /* RA Update request */
+
+ send_llc_ul_ui(nsi, "RA UPD REQ", &bss_peer[0], 0x1002,
+ foreign_bss_tlli, &rai_unknown, 0x7080,
+ GPRS_SAPI_GMM, bss_nu++,
+ dtap_ra_upd_req, sizeof(dtap_ra_upd_req));
+
+ send_llc_ul_ui(nsi, "IDENT RESPONSE", &bss_peer[0], 0x1002,
+ foreign_bss_tlli, &rai_bss, cell_id,
+ GPRS_SAPI_GMM, bss_nu++,
+ dtap_identity_resp, sizeof(dtap_identity_resp));
+
+ dump_peers(stdout, 0, 0, &gbcfg);
+
+ send_llc_dl_ui(nsi, "RA UDP ACC", &sgsn_peer, 0x1002,
+ random_sgsn_tlli2, 1, imsi, sizeof(imsi),
+ GPRS_SAPI_GMM, sgsn_nu++,
+ dtap_ra_upd_acc, sizeof(dtap_ra_upd_acc));
+
+ dump_peers(stdout, 0, 0, &gbcfg);
+
+ /* Detach */
+
+ send_llc_ul_ui(nsi, "DETACH REQ", &bss_peer[0], 0x1002,
+ local_bss_tlli, &rai_bss, cell_id,
+ GPRS_SAPI_GMM, bss_nu++,
+ dtap_detach_req, sizeof(dtap_detach_req));
+
+ dump_peers(stdout, 0, 0, &gbcfg);
+
+ send_llc_dl_ui(nsi, "DETACH ACC", &sgsn_peer, 0x1002,
+ local_sgsn_tlli, 1, imsi, sizeof(imsi),
+ GPRS_SAPI_GMM, sgsn_nu++,
+ dtap_detach_acc, sizeof(dtap_detach_acc));
+
+ dump_peers(stdout, 0, 0, &gbcfg);
+
/* Special case: Repeated Attach Requests */
send_llc_ul_ui(nsi, "ATTACH REQUEST", &bss_peer[0], 0x1002,
@@ -2432,6 +2470,25 @@
dump_peers(stdout, 0, 0, &gbcfg);
+ /* Special case: Repeated RA Update Requests */
+
+ send_llc_ul_ui(nsi, "RA UPD REQ", &bss_peer[0], 0x1002,
+ foreign_bss_tlli, &rai_unknown, 0x7080,
+ GPRS_SAPI_GMM, bss_nu++,
+ dtap_ra_upd_req, sizeof(dtap_ra_upd_req));
+
+ send_llc_ul_ui(nsi, "RA UPD REQ", &bss_peer[0], 0x1002,
+ foreign_bss_tlli, &rai_unknown, 0x7080,
+ GPRS_SAPI_GMM, bss_nu++,
+ dtap_ra_upd_req, sizeof(dtap_ra_upd_req));
+
+ send_llc_ul_ui(nsi, "DETACH REQ", &bss_peer[0], 0x1002,
+ foreign_bss_tlli, &rai_bss, cell_id,
+ GPRS_SAPI_GMM, bss_nu++,
+ dtap_detach_req, sizeof(dtap_detach_req));
+
+ dump_peers(stdout, 0, 0, &gbcfg);
+
dump_global(stdout, 0);
gbprox_reset(&gbcfg);