qcdm: add testcase to ensure that parsing Sierra CnS fails

Because CnS uses HDLC framing, but doesn't use CRC16, and thus
the decapsulation should fail because the CRC check fails.

3 files changed, 23 insertions, 0 deletions

diff --git a/libqcdm/tests/test-qcdm-utils.c b/libqcdm/tests/test-qcdm-utils.c
index 27ec8d61..04807c16 100644
--- a/libqcdm/tests/test-qcdm-utils.c
+++ b/libqcdm/tests/test-qcdm-utils.c
@@ -84,3 +84,23 @@ test_utils_encapsulate_buffer (void *f, void *data)
     g_assert (memcmp (outbuf, encap_outbuf, encap_len) == 0);
 }
 
+static const char cns_inbuf[] = {
+    0x00, 0x0a, 0x6b, 0x74, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x7e
+};
+
+void
+test_utils_decapsulate_sierra_cns (void *f, void *data)
+{
+    gboolean success;
+    char outbuf[512];
+    gsize decap_len = 0;
+    gsize used = 0;
+    gboolean more = FALSE;
+
+    success = dm_decapsulate_buffer (cns_inbuf, sizeof (cns_inbuf),
+                                     outbuf, sizeof (outbuf),
+                                     &decap_len, &used, &more);
+    g_assert (success == FALSE);
+}
+
diff --git a/libqcdm/tests/test-qcdm-utils.h b/libqcdm/tests/test-qcdm-utils.h
index 80386664..65a99441 100644
--- a/libqcdm/tests/test-qcdm-utils.h
+++ b/libqcdm/tests/test-qcdm-utils.h
@@ -22,5 +22,7 @@ void test_utils_decapsulate_buffer (void *f, void *data);
 
 void test_utils_encapsulate_buffer (void *f, void *data);
 
+void test_utils_decapsulate_sierra_cns (void *f, void *data);
+
 #endif  /* TEST_QCDM_UTILS_H */
 
diff --git a/libqcdm/tests/test-qcdm.c b/libqcdm/tests/test-qcdm.c
index 63421c70..5867bcb9 100644
--- a/libqcdm/tests/test-qcdm.c
+++ b/libqcdm/tests/test-qcdm.c
@@ -89,6 +89,7 @@ int main (int argc, char **argv)
     g_test_suite_add (suite, TESTCASE (test_escape_unescape, NULL));
     g_test_suite_add (suite, TESTCASE (test_utils_decapsulate_buffer, NULL));
     g_test_suite_add (suite, TESTCASE (test_utils_encapsulate_buffer, NULL));
+    g_test_suite_add (suite, TESTCASE (test_utils_decapsulate_sierra_cns, NULL));
     g_test_suite_add (suite, TESTCASE (test_result_string, NULL));
     g_test_suite_add (suite, TESTCASE (test_result_uint32, NULL));
     g_test_suite_add (suite, TESTCASE (test_result_uint8, NULL));