nat: Return MGCP messages to the call agent

Attempt to find the message by transaction id, then patch
the response and use the IP/PORT of the local network, update
the ci with the one from the BSC.

This is currently not tracking any state of the MGCP and will
not handle two bsc's... this will need to happen later.

With this in we should be feature complete and now enter the
mode of making all of this work reliable and fixing thinko's
and other bugs.

1 files changed, 30 insertions, 0 deletions

diff --git a/openbsc/tests/bsc-nat/bsc_nat_test.c b/openbsc/tests/bsc-nat/bsc_nat_test.c
index c3b86c060..10b876b37 100644
--- a/openbsc/tests/bsc-nat/bsc_nat_test.c
+++ b/openbsc/tests/bsc-nat/bsc_nat_test.c
@@ -456,6 +456,35 @@ static void test_mgcp_rewrite(void)
 	msgb_free(input);
 }
 
+static void test_mgcp_parse(void)
+{
+	int code, ci;
+	char transaction[60];
+
+	fprintf(stderr, "Test MGCP response parsing.\n");
+
+	if (bsc_mgcp_parse_response(crcx_resp, &code, transaction) != 0) {
+		fprintf(stderr, "Failed to parse CRCX resp.\n");
+		abort();
+	}
+
+	if (code != 200) {
+		fprintf(stderr, "Failed to parse the CODE properly. Got: %d\n", code);
+		abort();
+	}
+
+	if (strcmp(transaction, "23265295") != 0) {
+		fprintf(stderr, "Failed to parse transaction id: '%s'\n", transaction);
+		abort();
+	}
+
+	ci = bsc_mgcp_extract_ci(crcx_resp);
+	if (ci != 1) {
+		fprintf(stderr, "Failed to parse the CI. Got: %d\n", ci);
+		abort();
+	}
+}
+
 int main(int argc, char **argv)
 {
 	struct debug_target *stderr_target;
@@ -470,6 +499,7 @@ int main(int argc, char **argv)
 	test_mgcp_ass_tracking();
 	test_mgcp_find();
 	test_mgcp_rewrite();
+	test_mgcp_parse();
 	return 0;
 }