Added teredo protocol support. Fixed #74

1 files changed, 52 insertions, 0 deletions

diff --git a/src/lib/protocols/teredo.c b/src/lib/protocols/teredo.c
new file mode 100644
index 000000000..9fb2c6483
--- /dev/null
+++ b/src/lib/protocols/teredo.c
@@ -0,0 +1,52 @@
+/*
+ * teredo.c
+ *
+ * Copyright (C) 2015 - ntop.org
+ *
+ * nDPI is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * nDPI is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with nDPI.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+
+#include "ndpi_protocols.h"
+
+#ifdef NDPI_PROTOCOL_TEREDO
+
+/* https://en.wikipedia.org/wiki/Teredo_tunneling */
+void ndpi_search_teredo(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+  struct ndpi_packet_struct *packet = &flow->packet;
+
+  if(packet->udp
+     && ((ntohs(packet->udp->source) == 3544) || (ntohs(packet->udp->dest) == 3544))
+     && (packet->payload_packet_len >= 40 /* IPv6 header */))
+    ndpi_int_change_protocol(ndpi_struct, flow, NDPI_PROTOCOL_TEREDO, NDPI_PROTOCOL_UNKNOWN);
+  else
+    NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_TEREDO);
+}
+
+
+void init_teredo_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask)
+{
+  ndpi_set_bitmask_protocol_detection("TEREDO", ndpi_struct, detection_bitmask, *id,
+				      NDPI_PROTOCOL_TEREDO,
+				      ndpi_search_teredo,
+				      NDPI_SELECTION_BITMASK_PROTOCOL_UDP_WITH_PAYLOAD,
+				      SAVE_DETECTION_BITMASK_AS_UNKNOWN,
+				      ADD_TO_DETECTION_BITMASK);
+
+  *id += 1;
+}
+
+#endif