Squashed 'third_party/rawrtc/rawrtc-data-channel/' content from commit 7b1b8d57c

Change-Id: I84850720e2b51961981d55f67238f4d282314fff
git-subtree-dir: third_party/rawrtc/rawrtc-data-channel
git-subtree-split: 7b1b8d57c6d07da18cc0de8bbca8cc5e8bd06eae
diff --git a/src/data_transport/utils.c b/src/data_transport/utils.c
new file mode 100644
index 0000000..1216eea
--- /dev/null
+++ b/src/data_transport/utils.c
@@ -0,0 +1,13 @@
+#include <rawrtcdc/data_transport.h>
+
+/*
+ * Translate a data transport type to str.
+ */
+char const* rawrtc_data_transport_type_to_str(enum rawrtc_data_transport_type const type) {
+    switch (type) {
+        case RAWRTC_DATA_TRANSPORT_TYPE_SCTP:
+            return "SCTP";
+        default:
+            return "???";
+    }
+}