nat: Test rewriting of MGCP messages to patch ip and port
Add code to change the ip and port for audio data inside
MGCP messages. This is needed because the BSS might be
behind the NAT and can not reach the network directly and
might be behind a nat so the announced sourceport is not
the one as we see it.
diff --git a/openbsc/tests/bsc-nat/bsc_nat_test.c b/openbsc/tests/bsc-nat/bsc_nat_test.c
index 30f1490..217c4f4 100644
--- a/openbsc/tests/bsc-nat/bsc_nat_test.c
+++ b/openbsc/tests/bsc-nat/bsc_nat_test.c
@@ -410,6 +410,40 @@
talloc_free(nat);
}
+static void test_mgcp_rewrite(void)
+{
+ int i;
+ struct msgb *input, *output;
+ fprintf(stderr, "Test rewriting MGCP messages.\n");
+
+ input = msgb_alloc(4096, "input");
+
+ for (i = 0; i < ARRAY_SIZE(mgcp_messages); ++i) {
+ const char *orig = mgcp_messages[i].orig;
+ const char *patc = mgcp_messages[i].patch;
+ const char *ip = mgcp_messages[i].ip;
+ const int port = mgcp_messages[i].port;
+
+ copy_to_msg(input, (const u_int8_t *) orig, strlen(orig) + 1);
+
+ output = bsc_mgcp_rewrite(input, ip, port);
+ if (msgb_l2len(output) != strlen(patc)) {
+ fprintf(stderr, "Wrong sizes for test: %d %d != %d != %d\n", i, msgb_l2len(output), strlen(patc), strlen(orig));
+ fprintf(stderr, "String '%s' vs '%s'\n", (const char *) output->l2h, patc);
+ abort();
+ }
+
+ if (memcmp(output->l2h, patc, msgb_l2len(output)) != 0) {
+ fprintf(stderr, "Broken on %d msg: '%s'\n", i, (const char *) output->l2h);
+ abort();
+ }
+
+ msgb_free(output);
+ }
+
+ msgb_free(input);
+}
+
int main(int argc, char **argv)
{
struct debug_target *stderr_target;
@@ -423,6 +457,7 @@
test_paging();
test_mgcp_ass_tracking();
test_mgcp_find();
+ test_mgcp_rewrite();
return 0;
}