1 files changed, 105 insertions, 0 deletions
diff --git a/src/lib/protocols/usenet.c b/src/lib/protocols/usenet.c
new file mode 100644
index 000000000..07ed91678
--- /dev/null
+++ b/src/lib/protocols/usenet.c
@@ -0,0 +1,105 @@
+/*
+ * usenet.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_USENET
+
+
+static void ndpi_int_usenet_add_connection(struct ndpi_detection_module_struct
+											 *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+	ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_USENET, NDPI_REAL_PROTOCOL);
+}
+
+
+
+void ndpi_search_usenet_tcp(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_USENET, ndpi_struct, NDPI_LOG_DEBUG, "USENET: search usenet.\n");
+
+
+
+
+
+	NDPI_LOG(NDPI_PROTOCOL_USENET, ndpi_struct, NDPI_LOG_DEBUG, "USENET: STAGE IS %u.\n", flow->l4.tcp.usenet_stage);
+
+
+	// check for the first server replay
+	/*
+	   200    Service available, posting allowed
+	   201    Service available, posting prohibited
+	 */
+	if (flow->l4.tcp.usenet_stage == 0 && packet->payload_packet_len > 10
+		&& ((memcmp(packet->payload, "200 ", 4) == 0)
+			|| (memcmp(packet->payload, "201 ", 4) == 0))) {
+
+		NDPI_LOG(NDPI_PROTOCOL_USENET, ndpi_struct, NDPI_LOG_DEBUG, "USENET: found 200 or 201.\n");
+		flow->l4.tcp.usenet_stage = 1 + packet->packet_direction;
+
+		NDPI_LOG(NDPI_PROTOCOL_USENET, ndpi_struct, NDPI_LOG_DEBUG, "USENET: maybe hit.\n");
+		return;
+	}
+
+	/*
+	   [C] AUTHINFO USER fred
+	   [S] 381 Enter passphrase
+	   [C] AUTHINFO PASS flintstone
+	   [S] 281 Authentication accepted
+	 */
+	// check for client username
+	if (flow->l4.tcp.usenet_stage == 2 - packet->packet_direction) {
+		if (packet->payload_packet_len > 20 && (memcmp(packet->payload, "AUTHINFO USER ", 14) == 0)) {
+			NDPI_LOG(NDPI_PROTOCOL_USENET, ndpi_struct, NDPI_LOG_DEBUG, "USENET: username found\n");
+			flow->l4.tcp.usenet_stage = 3 + packet->packet_direction;
+
+			NDPI_LOG(NDPI_PROTOCOL_USENET, ndpi_struct, NDPI_LOG_DEBUG, "USENET: found usenet.\n");
+			ndpi_int_usenet_add_connection(ndpi_struct, flow);
+			return;
+		} else if (packet->payload_packet_len == 13 && (memcmp(packet->payload, "MODE READER\r\n", 13) == 0)) {
+			NDPI_LOG(NDPI_PROTOCOL_USENET, ndpi_struct, NDPI_LOG_DEBUG,
+					"USENET: no login necessary but we are a client.\n");
+
+			NDPI_LOG(NDPI_PROTOCOL_USENET, ndpi_struct, NDPI_LOG_DEBUG, "USENET: found usenet.\n");
+			ndpi_int_usenet_add_connection(ndpi_struct, flow);
+			return;
+		}
+	}
+
+
+
+	NDPI_LOG(NDPI_PROTOCOL_USENET, ndpi_struct, NDPI_LOG_DEBUG, "USENET: exclude usenet.\n");
+
+	NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_USENET);
+
+}
+
+#endif