1 files changed, 102 insertions, 0 deletions
diff --git a/src/lib/protocols/mgcp.c b/src/lib/protocols/mgcp.c
new file mode 100644
index 000000000..c749f007b
--- /dev/null
+++ b/src/lib/protocols/mgcp.c
@@ -0,0 +1,102 @@
+/*
+ * mgcp.c
+ *
+ * Copyright (C) 2009-2011 by ipoque GmbH
+ * Copyright (C) 2011-15 - ntop.org
+ *
+ * This file is part of nDPI, an open source deep packet inspection
+ * library based on the OpenDPI and PACE technology by ipoque GmbH
+ *
+ * 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_MGCP
+
+static void ndpi_int_mgcp_add_connection(struct ndpi_detection_module_struct
+										   *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+	ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_MGCP, NDPI_REAL_PROTOCOL);
+}
+
+
+	
+#if !defined(WIN32)
+ static inline
+#else
+__forceinline static
+#endif
+	 void ndpi_search_mgcp_connection(struct ndpi_detection_module_struct
+												 *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+
+	struct ndpi_packet_struct *packet = &flow->packet;
+	
+//      struct ndpi_id_struct         *src=ndpi_struct->src;
+//      struct ndpi_id_struct         *dst=ndpi_struct->dst;
+
+	/* information about MGCP taken from http://en.wikipedia.org/wiki/MGCP */
+
+	u_int16_t pos = 4;
+
+	if (packet->payload_packet_len < 8) {
+		goto mgcp_excluded;
+	}
+
+	/* packet must end with 0x0d0a or with 0x0a */
+	if (packet->payload[packet->payload_packet_len - 1] != 0x0a
+		&& get_u_int16_t(packet->payload, packet->payload_packet_len - 2) != htons(0x0d0a)) {
+		goto mgcp_excluded;
+	}
+
+
+
+	if (packet->payload[0] != 'A' && packet->payload[0] != 'C' && packet->payload[0] != 'D' &&
+		packet->payload[0] != 'E' && packet->payload[0] != 'M' && packet->payload[0] != 'N' &&
+		packet->payload[0] != 'R') {
+		goto mgcp_excluded;
+	}
+	if (memcmp(packet->payload, "AUEP ", 5) != 0 && memcmp(packet->payload, "AUCX ", 5) != 0 &&
+		memcmp(packet->payload, "CRCX ", 5) != 0 && memcmp(packet->payload, "DLCX ", 5) != 0 &&
+		memcmp(packet->payload, "EPCF ", 5) != 0 && memcmp(packet->payload, "MDCX ", 5) != 0 &&
+		memcmp(packet->payload, "NTFY ", 5) != 0 && memcmp(packet->payload, "RQNT ", 5) != 0 &&
+		memcmp(packet->payload, "RSIP ", 5) != 0) {
+		goto mgcp_excluded;
+	}
+	// now search for string "MGCP " in the rest of the message
+	while ((pos + 5) < packet->payload_packet_len) {
+		if (memcmp(&packet->payload[pos], "MGCP ", 5) == 0) {
+			NDPI_LOG(NDPI_PROTOCOL_MGCP, ndpi_struct, NDPI_LOG_DEBUG, "MGCP match.\n");
+			ndpi_int_mgcp_add_connection(ndpi_struct, flow);
+			return;
+		}
+		pos++;
+	}
+
+  mgcp_excluded:
+	NDPI_LOG(NDPI_PROTOCOL_MGCP, ndpi_struct, NDPI_LOG_DEBUG, "exclude MGCP.\n");
+	NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_MGCP);
+}
+
+
+void ndpi_search_mgcp(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+
+	ndpi_search_mgcp_connection(ndpi_struct, flow);
+
+}
+#endif