Initial import from SVN

1 files changed, 70 insertions, 0 deletions

diff --git a/src/lib/protocols/tftp.c b/src/lib/protocols/tftp.c
new file mode 100644
index 000000000..d5145445b
--- /dev/null
+++ b/src/lib/protocols/tftp.c
@@ -0,0 +1,70 @@
+/*
+ * tftp.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_TFTP
+
+static void ndpi_int_tftp_add_connection(struct ndpi_detection_module_struct
+										   *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+	ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_TFTP, NDPI_REAL_PROTOCOL);
+}
+
+void ndpi_search_tftp(struct ndpi_detection_module_struct
+						*ndpi_struct, struct ndpi_flow_struct *flow)
+{
+	struct ndpi_packet_struct *packet = &flow->packet;
+	
+
+
+
+	NDPI_LOG(NDPI_PROTOCOL_TFTP, ndpi_struct, NDPI_LOG_DEBUG, "search TFTP.\n");
+
+
+
+	if (packet->payload_packet_len > 3 && flow->l4.udp.tftp_stage == 0
+		&& ntohl(get_u_int32_t(packet->payload, 0)) == 0x00030001) {
+		NDPI_LOG(NDPI_PROTOCOL_TFTP, ndpi_struct, NDPI_LOG_DEBUG, "maybe tftp. need next packet.\n");
+		flow->l4.udp.tftp_stage = 1;
+		return;
+	}
+	if (packet->payload_packet_len > 3 && (flow->l4.udp.tftp_stage == 1)
+		&& ntohl(get_u_int32_t(packet->payload, 0)) == 0x00040001) {
+
+		NDPI_LOG(NDPI_PROTOCOL_TFTP, ndpi_struct, NDPI_LOG_DEBUG, "found tftp.\n");
+		ndpi_int_tftp_add_connection(ndpi_struct, flow);
+		return;
+	}
+	if (packet->payload_packet_len > 1
+		&& ((packet->payload[0] == 0 && packet->payload[packet->payload_packet_len - 1] == 0)
+			|| (packet->payload_packet_len == 4 && ntohl(get_u_int32_t(packet->payload, 0)) == 0x00040000))) {
+		NDPI_LOG(NDPI_PROTOCOL_TFTP, ndpi_struct, NDPI_LOG_DEBUG, "skip initial packet.\n");
+		return;
+	}
+
+	NDPI_LOG(NDPI_PROTOCOL_TFTP, ndpi_struct, NDPI_LOG_DEBUG, "exclude TFTP.\n");
+	NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_TFTP);
+}
+#endif