nat: Add a test case for the connection tracking
This test case tests connectiont tracking by sending
a CR, getting a CC, sending a DTAP, receiving a DTAP,
receiving a RLSD, sending a RLC. It verifies that the
messages are properly patched specially the references
at the BSC.
diff --git a/openbsc/tests/bsc-nat/bsc_nat_test.c b/openbsc/tests/bsc-nat/bsc_nat_test.c
index df9c5b9..399cec9 100644
--- a/openbsc/tests/bsc-nat/bsc_nat_test.c
+++ b/openbsc/tests/bsc-nat/bsc_nat_test.c
@@ -27,6 +27,8 @@
#include <openbsc/gsm_data.h>
#include <openbsc/bsc_nat.h>
+#include <osmocore/talloc.h>
+
#include <stdio.h>
/* test messages for ipa */
@@ -145,12 +147,13 @@
},
};
-int main(int argc, char **argv)
+static void test_filter(void)
{
int i;
/* start testinh with proper messages */
+ fprintf(stderr, "Testing BSS Filtering.\n");
for (i = 0; i < ARRAY_SIZE(results); ++i) {
int result;
struct bsc_nat_parsed *parsed;
@@ -174,6 +177,143 @@
msgb_free(msg);
}
+}
+#include "bsc_data.c"
+
+static void copy_to_msg(struct msgb *msg, const u_int8_t *data, unsigned int length)
+{
+ msgb_reset(msg);
+ msg->l2h = msgb_put(msg, length);
+ memcpy(msg->l2h, data, msgb_l2len(msg));
+}
+
+#define VERIFY(con_found, con, msg, ver, str) \
+ if (con_found != con) { \
+ fprintf(stderr, "Failed to find the con: 0x%p\n", con_found); \
+ abort(); \
+ } \
+ if (memcmp(msg->data, ver, sizeof(ver)) != 0) { \
+ fprintf(stderr, "Failed to patch the %s msg.\n", str); \
+ abort(); \
+ }
+
+/* test conn tracking once */
+static void test_contrack()
+{
+ int rc;
+ struct bsc_nat *nat;
+ struct bsc_connection *con, *con_found;
+ struct bsc_nat_parsed *parsed;
+ struct msgb *msg;
+
+ fprintf(stderr, "Testing connection tracking.\n");
+ nat = bsc_nat_alloc();
+ con = bsc_connection_alloc(nat);
+ msg = msgb_alloc(4096, "test");
+
+ /* 1.) create a connection */
+ copy_to_msg(msg, bsc_cr, sizeof(bsc_cr));
+ parsed = bsc_nat_parse(msg);
+ con_found = patch_sccp_src_ref_to_msc(msg, parsed, nat);
+ if (con_found != NULL) {
+ fprintf(stderr, "Con should not exist 0x%p\n", con_found);
+ abort();
+ }
+ rc = create_sccp_src_ref(con, msg, parsed);
+ if (rc != 0) {
+ fprintf(stderr, "Failed to create a ref\n");
+ abort();
+ }
+ con_found = patch_sccp_src_ref_to_msc(msg, parsed, nat);
+ if (con_found != con) {
+ fprintf(stderr, "Failed to find the con: 0x%p\n", con_found);
+ abort();
+ }
+ if (memcmp(msg->data, bsc_cr_patched, sizeof(bsc_cr_patched)) != 0) {
+ fprintf(stderr, "Failed to patch the BSC CR msg.\n");
+ abort();
+ }
+ talloc_free(parsed);
+
+ /* 2.) get the cc */
+ copy_to_msg(msg, msc_cc, sizeof(msc_cc));
+ parsed = bsc_nat_parse(msg);
+ if (update_sccp_src_ref(con, msg, parsed) != 0) {
+ fprintf(stderr, "Failed to update the SCCP con.\n");
+ abort();
+ }
+ con_found = patch_sccp_src_ref_to_bsc(msg, parsed, nat);
+ VERIFY(con_found, con, msg, msc_cc_patched, "MSC CC");
+
+ /* 3.) send some data */
+ copy_to_msg(msg, bsc_dtap, sizeof(bsc_dtap));
+ parsed = bsc_nat_parse(msg);
+ con_found = patch_sccp_src_ref_to_msc(msg, parsed, nat);
+ VERIFY(con_found, con, msg, bsc_dtap_patched, "BSC DTAP");
+
+ /* 4.) receive some data */
+ copy_to_msg(msg, msc_dtap, sizeof(msc_dtap));
+ parsed = bsc_nat_parse(msg);
+ con_found = patch_sccp_src_ref_to_bsc(msg, parsed, nat);
+ VERIFY(con_found, con, msg, msc_dtap_patched, "MSC DTAP");
+
+ /* 5.) close the connection */
+ copy_to_msg(msg, msc_rlsd, sizeof(msc_rlsd));
+ parsed = bsc_nat_parse(msg);
+ con_found = patch_sccp_src_ref_to_bsc(msg, parsed, nat);
+ VERIFY(con_found, con, msg, msc_rlsd_patched, "MSC RLSD");
+
+ /* 6.) confirm the connection close */
+ copy_to_msg(msg, bsc_rlc, sizeof(bsc_rlc));
+ parsed = bsc_nat_parse(msg);
+ con_found = patch_sccp_src_ref_to_msc(msg, parsed, nat);
+ if (con_found != con) {
+ fprintf(stderr, "Failed to find the con: 0x%p\n", con_found);
+ abort();
+ }
+ if (memcmp(msg->data, bsc_rlc_patched, sizeof(bsc_rlc_patched)) != 0) {
+ fprintf(stderr, "Failed to patch the BSC CR msg.\n");
+ abort();
+ }
+ remove_sccp_src_ref(con, msg, parsed);
+ con_found = patch_sccp_src_ref_to_msc(msg, parsed, nat);
+
+ /* verify that it is gone */
+ if (con_found != NULL) {
+ fprintf(stderr, "Con should be gone. 0x%p\n", con_found);
+ abort();
+ }
+ talloc_free(parsed);
+
+
+ talloc_free(nat);
+ msgb_free(msg);
+}
+
+int main(int argc, char **argv)
+{
+ struct debug_target *stderr_target;
+
+ stderr_target = debug_target_create_stderr();
+ debug_add_target(stderr_target);
+ debug_set_all_filter(stderr_target, 1);
+
+ test_filter();
+
+ debug_set_log_level(stderr_target, 1);
+ test_contrack();
return 0;
}
+
+void input_event()
+{}
+int nm_state_event()
+{
+ return -1;
+}
+
+int gsm0408_rcvmsg(struct msgb *msg, u_int8_t link_id)
+{
+ return -1;
+}