Add Nano (XNO) protocol support (#2508)

1 files changed, 92 insertions, 0 deletions

diff --git a/src/lib/protocols/nano.c b/src/lib/protocols/nano.c
new file mode 100644
index 000000000..861614b82
--- /dev/null
+++ b/src/lib/protocols/nano.c
@@ -0,0 +1,92 @@
+/*
+ * nano.c
+ *
+ * Nano Network Protocol
+ * 
+ * Copyright (C) 2024 - ntop.org
+ * Copyright (C) 2024 - V.G <v.gavrilov@securitycode.ru>
+ *
+ * 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_protocol_ids.h"
+
+#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_NANO
+
+#include "ndpi_api.h"
+#include "ndpi_private.h"
+
+/* 
+ * Look for the latest version at https://docs.nano.org/releases/node-releases
+ */
+#define NANO_MIN_PROTOCOL_VER 18
+#define NANO_MAX_PROTOCOL_VER 20
+
+static void ndpi_int_nano_add_connection(struct ndpi_detection_module_struct *ndpi_struct,
+                                         struct ndpi_flow_struct *flow)
+{
+  NDPI_LOG_INFO(ndpi_struct, "found Nano Network Protocol\n");
+
+  ndpi_set_detected_protocol(ndpi_struct, flow,
+                             NDPI_PROTOCOL_NANO, NDPI_PROTOCOL_UNKNOWN,
+                             NDPI_CONFIDENCE_DPI);
+
+  if(ndpi_struct->mining_cache)
+  {
+    ndpi_lru_add_to_cache(ndpi_struct->mining_cache, mining_make_lru_cache_key(flow),
+                          NDPI_PROTOCOL_NANO, ndpi_get_current_time(flow));
+  }
+}
+
+static void ndpi_search_nano(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+  struct ndpi_packet_struct const * const packet = &ndpi_struct->packet;
+
+  NDPI_LOG_DBG(ndpi_struct, "search Nano Network Protocol\n");
+
+  if (packet->payload_packet_len > 32 &&
+      packet->payload[0] == 'R' && packet->payload[1] == 'C')
+  {
+    const u_int8_t max_ver = packet->payload[2];
+    const u_int8_t use_ver = packet->payload[3];
+    const u_int8_t min_ver = packet->payload[4];
+
+    if (max_ver == NANO_MAX_PROTOCOL_VER &&
+        use_ver <= NANO_MAX_PROTOCOL_VER && use_ver >= NANO_MIN_PROTOCOL_VER &&
+        min_ver >= NANO_MIN_PROTOCOL_VER && min_ver < NANO_MAX_PROTOCOL_VER &&
+        packet->payload[5] <= 0x0F)
+    {
+      ndpi_int_nano_add_connection(ndpi_struct, flow);
+      return;
+    }
+  }
+
+  NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+}
+
+void init_nano_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id)
+{
+  ndpi_set_bitmask_protocol_detection("Nano", ndpi_struct, *id,
+                                      NDPI_PROTOCOL_NANO,
+                                      ndpi_search_nano,
+                                      NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
+                                      SAVE_DETECTION_BITMASK_AS_UNKNOWN,
+                                      ADD_TO_DETECTION_BITMASK);
+
+  *id += 1;
+}