Add Raft protocol dissector.add/raft

Signed-off-by: Toni Uhlig <matzeton@googlemail.com>

2 files changed, 118 insertions, 0 deletions

diff --git a/src/lib/ndpi_main.c b/src/lib/ndpi_main.c
index 0cea75ced..b70ebdb73 100644
--- a/src/lib/ndpi_main.c
+++ b/src/lib/ndpi_main.c
@@ -2218,6 +2218,10 @@ static void ndpi_init_protocol_defaults(struct ndpi_detection_module_struct *ndp
 			  "Radmin", NDPI_PROTOCOL_CATEGORY_REMOTE_ACCESS,
 			  ndpi_build_default_ports(ports_a, 4899, 0, 0, 0, 0) /* TCP */,
 			  ndpi_build_default_ports(ports_b, 0, 0, 0, 0, 0) /* UDP */);
+  ndpi_set_proto_defaults(ndpi_str, 1 /* cleartext */, 0 /* nw proto */, NDPI_PROTOCOL_ACCEPTABLE, NDPI_PROTOCOL_RAFT,
+			  "Raft", NDPI_PROTOCOL_CATEGORY_NETWORK,
+			  ndpi_build_default_ports(ports_a, 0, 0, 0, 0, 0) /* TCP */,
+			  ndpi_build_default_ports(ports_b, 0, 0, 0, 0, 0) /* UDP */);
 
 #ifdef CUSTOM_NDPI_PROTOCOLS
 #include "../../../nDPI-custom/custom_ndpi_main.c"
@@ -5884,6 +5888,9 @@ static int ndpi_callback_init(struct ndpi_detection_module_struct *ndpi_str) {
   /* RDP */
   init_radmin_dissector(ndpi_str, &a);
 
+  /* Raft */
+  init_raft_dissector(ndpi_str, &a);
+
 #ifdef CUSTOM_NDPI_PROTOCOLS
 #include "../../../nDPI-custom/custom_ndpi_main_init.c"
 #endif
diff --git a/src/lib/protocols/raft.c b/src/lib/protocols/raft.c
new file mode 100644
index 000000000..6f0428561
--- /dev/null
+++ b/src/lib/protocols/raft.c
@@ -0,0 +1,111 @@
+/*
+ * raft.c
+ *
+ * Copyright (C) 2024 - 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_protocol_ids.h"
+
+#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_RAFT
+#include "ndpi_api.h"
+#include "ndpi_private.h"
+
+PACK_ON
+struct raft_header {
+  uint64_t msg_type;
+  uint64_t msg_length;
+} PACK_OFF;
+
+enum raft_header_type {
+  RAFT_IO_APPEND_ENTRIES = 1,
+  RAFT_IO_APPEND_ENTRIES_RESULT,
+  RAFT_IO_REQUEST_VOTE,
+  RAFT_IO_REQUEST_VOTE_RESULT,
+  RAFT_IO_INSTALL_SNAPSHOT,
+  RAFT_IO_TIMEOUT_NOW
+};
+
+static void ndpi_int_raft_add_connection(struct ndpi_detection_module_struct *ndpi_struct,
+                                         struct ndpi_flow_struct *flow)
+{
+  NDPI_LOG_INFO(ndpi_struct, "found raft\n");
+  ndpi_set_detected_protocol(ndpi_struct, flow,
+                             NDPI_PROTOCOL_RAFT,
+                             NDPI_PROTOCOL_UNKNOWN,
+                             NDPI_CONFIDENCE_DPI);
+}
+
+static void ndpi_search_raft(struct ndpi_detection_module_struct *ndpi_struct,
+                             struct ndpi_flow_struct *flow)
+{
+  struct ndpi_packet_struct const * const packet = &ndpi_struct->packet;
+  struct raft_header const * const raft_header = (struct raft_header *)packet->payload;
+
+  NDPI_LOG_DBG(ndpi_struct, "search raft\n");
+
+  if (packet->payload_packet_len < sizeof(*raft_header))
+  {
+    NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+    return;
+  }
+
+  uint64_t msg_type = le64toh(raft_header->msg_type);
+  switch (msg_type)
+  {
+    case RAFT_IO_APPEND_ENTRIES:
+    case RAFT_IO_APPEND_ENTRIES_RESULT:
+    case RAFT_IO_REQUEST_VOTE:
+    case RAFT_IO_REQUEST_VOTE_RESULT:
+    case RAFT_IO_INSTALL_SNAPSHOT:
+    case RAFT_IO_TIMEOUT_NOW:
+      break;
+
+    default:
+      NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+      return;
+  }
+
+  uint64_t msg_length = le64toh(raft_header->msg_length);
+  if (msg_length == packet->payload_packet_len - sizeof(*raft_header))
+  {
+    ndpi_int_raft_add_connection(ndpi_struct, flow);
+    return;
+  }
+
+  if (flow->packet_counter < 3)
+  {
+    return;
+  }
+
+  ndpi_int_raft_add_connection(ndpi_struct, flow);
+}
+
+void init_raft_dissector(struct ndpi_detection_module_struct *ndpi_struct,
+                         u_int32_t *id)
+{
+  ndpi_set_bitmask_protocol_detection("Raft", ndpi_struct, *id,
+                                      NDPI_PROTOCOL_RAFT,
+                                      ndpi_search_raft,
+                                      NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
+                                      SAVE_DETECTION_BITMASK_AS_UNKNOWN,
+                                      ADD_TO_DETECTION_BITMASK);
+
+  *id += 1;
+}
+