1 files changed, 52 insertions, 0 deletions
diff --git a/src/lib/protocols/rtcp.c b/src/lib/protocols/rtcp.c
new file mode 100644
index 000000000..02875648a
--- /dev/null
+++ b/src/lib/protocols/rtcp.c
@@ -0,0 +1,52 @@
+/*
+ * rtcp.c (RTP Control Protocol)
+ *
+ * Copyright (C) 2013 Remy Mudingay <mudingay@ill.fr>
+ *
+ */
+
+
+#include "ndpi_api.h"
+
+#ifdef NDPI_PROTOCOL_RTCP
+static void ndpi_int_rtcp_add_connection(struct ndpi_detection_module_struct
+					 *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+  ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_RTCP, NDPI_CORRELATED_PROTOCOL);
+}
+
+void ndpi_search_rtcp(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+  struct ndpi_packet_struct *packet = &flow->packet;
+  u_int16_t dport = 0, sport = 0;
+
+  NDPI_LOG(NDPI_PROTOCOL_RTCP, ndpi_struct, NDPI_LOG_DEBUG, "search for RTCP.\n");
+
+  if(packet->tcp != NULL) {
+    sport = ntohs(packet->tcp->source), dport = ntohs(packet->tcp->dest);
+    NDPI_LOG(NDPI_PROTOCOL_RTCP, ndpi_struct, NDPI_LOG_DEBUG, "calculating dport over tcp.\n");
+
+    if(packet->payload_packet_len > 13 && (sport == 554 || dport == 554) &&
+       packet->payload[0] == 0x00 && packet->payload[1] == 0x00 &&
+       packet->payload[2] == 0x01 && packet->payload[3] == 0x01 &&
+       packet->payload[4] == 0x08 && packet->payload[5] == 0x0a &&
+       packet->payload[6] == 0x00 && packet->payload[7] == 0x01) {
+      NDPI_LOG(NDPI_PROTOCOL_RTCP, ndpi_struct, NDPI_LOG_DEBUG, "found rtcp.\n");
+      ndpi_int_rtcp_add_connection(ndpi_struct, flow);
+    }
+  } else if(packet->udp != NULL) {
+    sport = ntohs(packet->udp->source), dport = ntohs(packet->udp->dest);
+    NDPI_LOG(NDPI_PROTOCOL_RTCP, ndpi_struct, NDPI_LOG_DEBUG, "calculating dport over udp.\n");
+    if(((packet->payload_packet_len >= 28 || packet->payload_packet_len <= 1200) &&
+	((packet->payload[0] == 0x80) && ((packet->payload[1] == 0xc8) || (packet->payload[1] == 0xc9)) && (packet->payload[2] == 0x00)))
+       || (((packet->payload[0] == 0x81) && ((packet->payload[1] == 0xc8) || (packet->payload[1] == 0xc9))
+	    && (packet->payload[2] == 0x00)))) {
+      NDPI_LOG(NDPI_PROTOCOL_RTCP, ndpi_struct, NDPI_LOG_DEBUG, "found rtcp.\n");
+      ndpi_int_rtcp_add_connection(ndpi_struct, flow);
+    }
+  } else {
+    NDPI_LOG(NDPI_PROTOCOL_RTCP, ndpi_struct, NDPI_LOG_DEBUG, "exclude RTCP.\n");
+    NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_RTCP);
+  }
+}
+#endif