Initial import from SVN

1 files changed, 219 insertions, 0 deletions

diff --git a/src/lib/protocols/sopcast.c b/src/lib/protocols/sopcast.c
new file mode 100644
index 000000000..363caba42
--- /dev/null
+++ b/src/lib/protocols/sopcast.c
@@ -0,0 +1,219 @@
+/*
+ * sopcast.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_SOPCAST
+
+
+static void ndpi_int_sopcast_add_connection(struct ndpi_detection_module_struct
+											  *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+	ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_SOPCAST, NDPI_REAL_PROTOCOL);
+}
+
+/**
+ * this function checks for sopcast tcp pattern
+ *
+ * NOTE: if you add more patterns please keep the number of if levels
+ * low, it is already complex enough
+ */
+	
+#if !defined(WIN32)
+ static inline
+#else
+__forceinline static
+#endif
+	 u_int8_t ndpi_int_is_sopcast_tcp(const u_int8_t * payload, const u_int16_t payload_len)
+{
+	if (payload_len != 54)
+		return 0;
+
+	if (payload[2] != payload[3] - 4 && payload[2] != payload[3] + 4)
+		return 0;
+
+	if (payload[2] != payload[4] - 1 && payload[2] != payload[4] + 1)
+		return 0;
+
+	if (payload[25] != payload[25 + 16 - 1] + 1 && payload[25] != payload[25 + 16 - 1] - 1) {
+
+		if (payload[3] != payload[25] &&
+			payload[3] != payload[25] - 4 && payload[3] != payload[25] + 4 && payload[3] != payload[25] - 21) {
+			return 0;
+		}
+	}
+
+	if (payload[4] != payload[28] ||
+		payload[28] != payload[30] ||
+		payload[30] != payload[31] ||
+		get_u_int16_t(payload, 30) != get_u_int16_t(payload, 32) || get_u_int16_t(payload, 32) != get_u_int16_t(payload, 34)) {
+
+		if ((payload[2] != payload[5] - 1 && payload[2] != payload[5] + 1) ||
+			payload[2] != payload[25] ||
+			payload[4] != payload[28] ||
+			payload[4] != payload[31] ||
+			payload[4] != payload[32] ||
+			payload[4] != payload[33] ||
+			payload[4] != payload[34] ||
+			payload[4] != payload[35] || payload[4] != payload[30] || payload[2] != payload[36]) {
+			return 0;
+		}
+	}
+
+	if (payload[42] != payload[53])
+		return 0;
+
+	if (payload[45] != payload[46] + 1 && payload[45] != payload[46] - 1)
+		return 0;
+
+	if (payload[45] != payload[49] || payload[46] != payload[50] || payload[47] != payload[51])
+		return 0;
+
+	return 1;
+}
+
+static void ndpi_search_sopcast_tcp(struct ndpi_detection_module_struct
+									  *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+
+	struct ndpi_packet_struct *packet = &flow->packet;
+	
+	if (flow->packet_counter == 1 && packet->payload_packet_len == 54 && get_u_int16_t(packet->payload, 0) == ntohs(0x0036)) {
+		if (ndpi_int_is_sopcast_tcp(packet->payload, packet->payload_packet_len)) {
+			NDPI_LOG(NDPI_PROTOCOL_SOPCAST, ndpi_struct, NDPI_LOG_DEBUG, "found sopcast TCP \n");
+			ndpi_int_sopcast_add_connection(ndpi_struct, flow);
+			return;
+		}
+	}
+
+	NDPI_LOG(NDPI_PROTOCOL_SOPCAST, ndpi_struct, NDPI_LOG_DEBUG, "exclude sopcast TCP.  \n");
+	NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_SOPCAST);
+
+
+}
+
+static void ndpi_search_sopcast_udp(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;
+
+	NDPI_LOG(NDPI_PROTOCOL_SOPCAST, ndpi_struct, NDPI_LOG_DEBUG, "search sopcast.  \n");
+
+
+	if (packet->payload_packet_len == 52 && packet->payload[0] == 0xff
+		&& packet->payload[1] == 0xff && packet->payload[2] == 0x01
+		&& packet->payload[8] == 0x02 && packet->payload[9] == 0xff
+		&& packet->payload[10] == 0x00 && packet->payload[11] == 0x2c
+		&& packet->payload[12] == 0x00 && packet->payload[13] == 0x00 && packet->payload[14] == 0x00) {
+		NDPI_LOG(NDPI_PROTOCOL_SOPCAST, ndpi_struct, NDPI_LOG_DEBUG, "found sopcast with if I.  \n");
+		ndpi_int_sopcast_add_connection(ndpi_struct, flow);
+		return;
+	}
+	if ((packet->payload_packet_len == 80 || packet->payload_packet_len == 28 || packet->payload_packet_len == 94)
+		&& packet->payload[0] == 0x00 && (packet->payload[2] == 0x02 || packet->payload[2] == 0x01)
+		&& packet->payload[8] == 0x01 && packet->payload[9] == 0xff
+		&& packet->payload[10] == 0x00 && packet->payload[11] == 0x14
+		&& packet->payload[12] == 0x00 && packet->payload[13] == 0x00) {
+		NDPI_LOG(NDPI_PROTOCOL_SOPCAST, ndpi_struct, NDPI_LOG_DEBUG, "found sopcast with if II.  \n");
+		ndpi_int_sopcast_add_connection(ndpi_struct, flow);
+		return;
+	}
+	/* this case has been seen once. Please revome this comment, if you see it another time */
+	if (packet->payload_packet_len == 60 && packet->payload[0] == 0x00
+		&& packet->payload[2] == 0x01
+		&& packet->payload[8] == 0x03 && packet->payload[9] == 0xff
+		&& packet->payload[10] == 0x00 && packet->payload[11] == 0x34
+		&& packet->payload[12] == 0x00 && packet->payload[13] == 0x00 && packet->payload[14] == 0x00) {
+		NDPI_LOG(NDPI_PROTOCOL_SOPCAST, ndpi_struct, NDPI_LOG_DEBUG, "found sopcast with if III.  \n");
+		ndpi_int_sopcast_add_connection(ndpi_struct, flow);
+		return;
+	}
+	if (packet->payload_packet_len == 42 && packet->payload[0] == 0x00
+		&& packet->payload[1] == 0x02 && packet->payload[2] == 0x01
+		&& packet->payload[3] == 0x07 && packet->payload[4] == 0x03
+		&& packet->payload[8] == 0x06
+		&& packet->payload[9] == 0x01 && packet->payload[10] == 0x00
+		&& packet->payload[11] == 0x22 && packet->payload[12] == 0x00 && packet->payload[13] == 0x00) {
+		NDPI_LOG(NDPI_PROTOCOL_SOPCAST, ndpi_struct, NDPI_LOG_DEBUG, "found sopcast with if IV.  \n");
+		ndpi_int_sopcast_add_connection(ndpi_struct, flow);
+		return;
+	}
+	if (packet->payload_packet_len == 28 && packet->payload[0] == 0x00
+		&& packet->payload[1] == 0x0c && packet->payload[2] == 0x01
+		&& packet->payload[3] == 0x07 && packet->payload[4] == 0x00
+		&& packet->payload[8] == 0x01
+		&& packet->payload[9] == 0x01 && packet->payload[10] == 0x00
+		&& packet->payload[11] == 0x14 && packet->payload[12] == 0x00 && packet->payload[13] == 0x00) {
+		NDPI_LOG(NDPI_PROTOCOL_SOPCAST, ndpi_struct, NDPI_LOG_DEBUG, "found sopcast with if V.  \n");
+		ndpi_int_sopcast_add_connection(ndpi_struct, flow);
+		return;
+	}
+	/* this case has been seen once. Please revome this comment, if you see it another time */
+	if (packet->payload_packet_len == 286 && packet->payload[0] == 0x00
+		&& packet->payload[1] == 0x02 && packet->payload[2] == 0x01
+		&& packet->payload[3] == 0x07 && packet->payload[4] == 0x03
+		&& packet->payload[8] == 0x06
+		&& packet->payload[9] == 0x01 && packet->payload[10] == 0x01
+		&& packet->payload[11] == 0x16 && packet->payload[12] == 0x00 && packet->payload[13] == 0x00) {
+		NDPI_LOG(NDPI_PROTOCOL_SOPCAST, ndpi_struct, NDPI_LOG_DEBUG, "found sopcast with if VI.  \n");
+		ndpi_int_sopcast_add_connection(ndpi_struct, flow);
+		return;
+	}
+	if (packet->payload_packet_len == 76 && packet->payload[0] == 0xff
+		&& packet->payload[1] == 0xff && packet->payload[2] == 0x01
+		&& packet->payload[8] == 0x0c && packet->payload[9] == 0xff
+		&& packet->payload[10] == 0x00 && packet->payload[11] == 0x44
+		&& packet->payload[16] == 0x01 && packet->payload[15] == 0x01
+		&& packet->payload[12] == 0x00 && packet->payload[13] == 0x00 && packet->payload[14] == 0x00) {
+		NDPI_LOG(NDPI_PROTOCOL_SOPCAST, ndpi_struct, NDPI_LOG_DEBUG, "found sopcast with if VII.  \n");
+		ndpi_int_sopcast_add_connection(ndpi_struct, flow);
+		return;
+	}
+
+	/* Attention please: no asymmetric detection necessary. This detection works asymmetrically as well. */
+
+	NDPI_LOG(NDPI_PROTOCOL_SOPCAST, ndpi_struct, NDPI_LOG_DEBUG, "exclude sopcast.  \n");
+	NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_SOPCAST);
+
+
+
+}
+
+void ndpi_search_sopcast(struct ndpi_detection_module_struct
+						   *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+	struct ndpi_packet_struct *packet = &flow->packet;
+
+	if (packet->udp != NULL)
+		ndpi_search_sopcast_udp(ndpi_struct, flow);
+	if (packet->tcp != NULL)
+		ndpi_search_sopcast_tcp(ndpi_struct, flow);
+
+}
+#endif