gtphub: handle Delete PDP Context.
During resolution of the header TEI, also return the tunnel struct that
resolved the TEI, so the Delete PDP Ctx code does not need to look it up
again.
Upon Delete PDP Ctx Request, remember the IEs and that a request was made.
Upon Delete PDP Ctx Response, find the pending delete and remove the
corresponding tunnel, iff the response indicates success.
Add a context deletion to regression tests, rename the test appropriately.
Sponsored-by: On-Waves ehi
diff --git a/openbsc/tests/gtphub/gtphub_test.c b/openbsc/tests/gtphub/gtphub_test.c
index b0ede11..fea55e0 100644
--- a/openbsc/tests/gtphub/gtphub_test.c
+++ b/openbsc/tests/gtphub/gtphub_test.c
@@ -954,9 +954,75 @@
return 1;
}
-static void test_create_pdp_ctx(void)
+#define MSG_DEL_PDP_CTX_REQ(tei, seq) \
+ "32" /* 0b001'1 0010: version 1, protocol GTP, with seq nr. */ \
+ "14" /* type 20: Delete PDP Context Request */ \
+ "0008" /* msg length = 8 + len (2 octets) */ \
+ tei /* TEI Ctrl */ \
+ seq /* Sequence nr (2 octets) */ \
+ "00" /* N-PDU 0 */ \
+ "00" /* No extensions */ \
+ /* IEs */ \
+ "13fe" /* 19: Teardown ind = 0 */ \
+ "1400" /* 20: NSAPI = 0*/ \
+
+#define MSG_DEL_PDP_CTX_RSP(tei, seq) \
+ "32" /* 0b001'1 0010: version 1, protocol GTP, with seq nr. */ \
+ "15" /* type 21: Delete PDP Context Response */ \
+ "0006" /* msg length = 8 + len (2 octets) */ \
+ tei /* TEI Ctrl */ \
+ seq /* Sequence nr (2 octets) */ \
+ "00" /* N-PDU 0 */ \
+ "00" /* No extensions */ \
+ /* IEs */ \
+ "01" /* 1: Cause */ \
+ "80" /* value = 0b10000000 = response, no rejection. */ \
+
+static int delete_pdp_ctx(void)
{
- LOG("test_create_pdp_ctx");
+ now += GTPH_EXPIRE_QUICKLY_SECS + 1;
+ gtphub_gc(hub, now);
+
+ LVL2_ASSERT(tunnels_are(
+ "192.168.42.23 (TEI C 321=1 / U 123=2)"
+ " <-> 192.168.43.34 (TEI C 765=3 / U 567=4)"
+ " @21945\n"));
+
+ /* TEI Ctrl from above and next sequence after abcd. */
+ const char *gtp_req_from_sgsn = MSG_DEL_PDP_CTX_REQ("00000003", "abce");
+ const char *gtp_req_to_ggsn = MSG_DEL_PDP_CTX_REQ("00000765", "6d32");
+
+ LVL2_ASSERT(msg_from_sgsn_c(&sgsn_sender,
+ &resolved_ggsn_addr,
+ gtp_req_from_sgsn,
+ gtp_req_to_ggsn));
+
+ /* 21945 + 31 = 21976 */
+ LVL2_ASSERT(tunnels_are(
+ "192.168.42.23 (TEI C 321=1 / U 123=2)"
+ " <-> 192.168.43.34 (TEI C 765=3 / U 567=4)"
+ " @21976\n"));
+
+ const char *gtp_resp_from_ggsn =
+ MSG_DEL_PDP_CTX_RSP("00000001", "6d32");
+ const char *gtp_resp_to_sgsn =
+ MSG_DEL_PDP_CTX_RSP("00000321", "abce");
+
+ /* The response should go back to whichever port the request came from
+ * (unmapped by sequence nr) */
+ LVL2_ASSERT(msg_from_ggsn_c(&resolved_ggsn_addr,
+ &sgsn_sender,
+ gtp_resp_from_ggsn,
+ gtp_resp_to_sgsn));
+
+ LVL2_ASSERT(tunnels_are(""));
+
+ return 1;
+}
+
+static void test_one_pdp_ctx(void)
+{
+ LOG("test_one_pdp_ctx");
OSMO_ASSERT(setup_test_hub());
OSMO_ASSERT(create_pdp_ctx());
@@ -982,6 +1048,10 @@
"192.168.42.23 (TEI C 321=1 / U 123=2)"
" <-> 192.168.43.34 (TEI C 765=3 / U 567=4)"
" @21945\n"));
+
+ OSMO_ASSERT(delete_pdp_ctx());
+ OSMO_ASSERT(tunnels_are(""));
+
OSMO_ASSERT(clear_test_hub());
}
@@ -1108,7 +1178,7 @@
test_nr_map_wrap();
test_expiry();
test_echo();
- test_create_pdp_ctx();
+ test_one_pdp_ctx();
test_user_data();
printf("Done\n");