Initial import from SVN

1 files changed, 105 insertions, 0 deletions

diff --git a/src/lib/protocols/ppstream.c b/src/lib/protocols/ppstream.c
new file mode 100644
index 000000000..06c3c4045
--- /dev/null
+++ b/src/lib/protocols/ppstream.c
@@ -0,0 +1,105 @@
+/*
+ * ppstream.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_PPSTREAM
+
+static void ndpi_int_ppstream_add_connection(struct ndpi_detection_module_struct
+											   *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+	ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_PPSTREAM, NDPI_REAL_PROTOCOL);
+}
+
+void ndpi_search_ppstream(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;
+
+
+
+	/* check TCP Connections -> Videodata */
+	if (packet->tcp != NULL) {
+		if (packet->payload_packet_len >= 60 && get_u_int32_t(packet->payload, 52) == 0
+			&& memcmp(packet->payload, "PSProtocol\x0", 11) == 0) {
+			NDPI_LOG(NDPI_PROTOCOL_PPSTREAM, ndpi_struct, NDPI_LOG_DEBUG, "found ppstream over tcp.\n");
+			ndpi_int_ppstream_add_connection(ndpi_struct, flow);
+			return;
+		}
+	}
+
+	if (packet->udp != NULL) {
+		if (packet->payload_packet_len > 2 && packet->payload[2] == 0x43
+			&& ((packet->payload_packet_len - 4 == get_l16(packet->payload, 0))
+				|| (packet->payload_packet_len == get_l16(packet->payload, 0))
+				|| (packet->payload_packet_len >= 6 && packet->payload_packet_len - 6 == get_l16(packet->payload, 0)))) {
+			flow->l4.udp.ppstream_stage++;
+			if (flow->l4.udp.ppstream_stage == 5) {
+				NDPI_LOG(NDPI_PROTOCOL_PPSTREAM, ndpi_struct, NDPI_LOG_DEBUG,
+						"found ppstream over udp pattern len, 43.\n");
+				ndpi_int_ppstream_add_connection(ndpi_struct, flow);
+				return;
+			}
+			return;
+		}
+
+		if (flow->l4.udp.ppstream_stage == 0
+			&& packet->payload_packet_len > 4 && ((packet->payload_packet_len - 4 == get_l16(packet->payload, 0))
+												  || (packet->payload_packet_len == get_l16(packet->payload, 0))
+												  || (packet->payload_packet_len >= 6
+													  && packet->payload_packet_len - 6 == get_l16(packet->payload,
+																								   0)))) {
+
+			if (packet->payload[2] == 0x00 && packet->payload[3] == 0x00 && packet->payload[4] == 0x03) {
+				flow->l4.udp.ppstream_stage = 7;
+				NDPI_LOG(NDPI_PROTOCOL_PPSTREAM, ndpi_struct, NDPI_LOG_DEBUG, "need next packet I.\n");
+				return;
+			}
+		}
+
+		if (flow->l4.udp.ppstream_stage == 7
+			&& packet->payload_packet_len > 4 && packet->payload[3] == 0x00
+			&& ((packet->payload_packet_len - 4 == get_l16(packet->payload, 0))
+				|| (packet->payload_packet_len == get_l16(packet->payload, 0))
+				|| (packet->payload_packet_len >= 6 && packet->payload_packet_len - 6 == get_l16(packet->payload, 0)))
+			&& (packet->payload[2] == 0x00 && packet->payload[4] == 0x03)) {
+			NDPI_LOG(NDPI_PROTOCOL_PPSTREAM, ndpi_struct, NDPI_LOG_DEBUG,
+					"found ppstream over udp with pattern Vb.\n");
+			ndpi_int_ppstream_add_connection(ndpi_struct, flow);
+			return;
+		}
+
+
+
+
+	}
+
+	NDPI_LOG(NDPI_PROTOCOL_PPSTREAM, ndpi_struct, NDPI_LOG_DEBUG, "exclude ppstream.\n");
+	NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_PPSTREAM);
+}
+#endif