Implemented Mikrotik discovery protocol dissection and metadata extraction (#2618)

3 files changed, 135 insertions, 8 deletions

diff --git a/src/lib/ndpi_main.c b/src/lib/ndpi_main.c
index e086d6f01..4bfc34ce0 100644
--- a/src/lib/ndpi_main.c
+++ b/src/lib/ndpi_main.c
@@ -1634,6 +1634,10 @@ static void ndpi_init_protocol_defaults(struct ndpi_detection_module_struct *ndp
 			  "MPEG_TS", NDPI_PROTOCOL_CATEGORY_MEDIA,
 			  ndpi_build_default_ports(ports_a, 0, 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_MIKROTIK,
+			  "Mikrotik", 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 */);
   /* http://en.wikipedia.org/wiki/Link-local_Multicast_Name_Resolution */
   ndpi_set_proto_defaults(ndpi_str, 1 /* cleartext */, 0 /* nw proto */, NDPI_PROTOCOL_ACCEPTABLE, NDPI_PROTOCOL_LLMNR,
 			  "LLMNR", NDPI_PROTOCOL_CATEGORY_NETWORK,
@@ -5950,6 +5954,9 @@ static int ndpi_callback_init(struct ndpi_detection_module_struct *ndpi_str) {
   /* KAKAOTALK_VOICE */
   init_kakaotalk_voice_dissector(ndpi_str, &a);
 
+  /* MIKROTIK */
+  init_mikrotik_dissector(ndpi_str, &a);
+
   /* MPEGTS */
   init_mpegts_dissector(ndpi_str, &a);
 
diff --git a/src/lib/protocols/ajp.c b/src/lib/protocols/ajp.c
index 3d2317fb2..4d8768890 100644
--- a/src/lib/protocols/ajp.c
+++ b/src/lib/protocols/ajp.c
@@ -35,7 +35,7 @@ enum ajp_direction {
 enum ajp_packet_type {
   AJP_UNKNOWN = 0,
 
-   /* packet types */
+  /* packet types */
   AJP_FORWARD_REQUEST = 2,
   AJP_SEND_BODY_CHUNK = 3,
   AJP_SEND_HEADERS = 4,
@@ -56,10 +56,10 @@ struct ajp_header {
 } PACK_OFF;
 
 static void set_ajp_detected(struct ndpi_detection_module_struct *ndpi_struct,
-           struct ndpi_flow_struct *flow) {
+			     struct ndpi_flow_struct *flow) {
 
   if(flow->detected_protocol_stack[0] == NDPI_PROTOCOL_UNKNOWN) {
-      ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_AJP, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
+    ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_AJP, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
   }
 }
 
@@ -121,13 +121,13 @@ static void ndpi_search_ajp(struct ndpi_detection_module_struct *ndpi_struct,
 
 
 void init_ajp_dissector(struct ndpi_detection_module_struct *ndpi_struct,
-  u_int32_t *id)
+			u_int32_t *id)
 {
   ndpi_set_bitmask_protocol_detection("AJP", ndpi_struct,
-    *id, NDPI_PROTOCOL_AJP, ndpi_search_ajp,
-    NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
-    SAVE_DETECTION_BITMASK_AS_UNKNOWN,
-    ADD_TO_DETECTION_BITMASK);
+				      *id, NDPI_PROTOCOL_AJP, ndpi_search_ajp,
+				      NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
+				      SAVE_DETECTION_BITMASK_AS_UNKNOWN,
+				      ADD_TO_DETECTION_BITMASK);
 
   *id += 1;
 }
diff --git a/src/lib/protocols/mikrotik.c b/src/lib/protocols/mikrotik.c
new file mode 100644
index 000000000..b1d315581
--- /dev/null
+++ b/src/lib/protocols/mikrotik.c
@@ -0,0 +1,120 @@
+/*
+ * mikrotik.c
+ *
+ * Copyright (C) 2012-24 - ntop.org
+ *
+ * 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_MIKROTIK
+
+#include "ndpi_api.h"
+#include "ndpi_private.h"
+
+/* ********************************* */
+
+static void ndpi_search_mikrotik(struct ndpi_detection_module_struct *ndpi_struct,
+				 struct ndpi_flow_struct *flow) {
+  struct ndpi_packet_struct *packet = &ndpi_struct->packet;
+
+  NDPI_LOG_DBG(ndpi_struct, "search MIKROTIK\n");
+
+  if((packet->iph && (packet->iph->daddr== 0xFFFFFFFF))
+     || (packet->iphv6 && (ntohl(packet->iphv6->ip6_dst.u6_addr.u6_addr32[0]) == 0xFF020000 /* ff02:: */))
+    ) {
+    if(ntohs(packet->udp->dest) == 5678) {
+      const u_int8_t *payload;
+      u_int16_t offset;
+    
+      if (packet->payload_packet_len < 8) {
+	NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+	return;
+      } else {
+	offset = 4;
+	payload = packet->payload;
+      }
+
+      while((offset+4) < packet->payload_packet_len) {
+	u_int16_t m_type = ((u_int16_t)payload[offset] << 8) + payload[offset+1];
+	u_int16_t m_len  = ((u_int16_t)payload[offset+2] << 8) + payload[offset+3];
+
+	// printf("%d\n", m_type);
+
+	if((m_len+offset) < packet->payload_packet_len) {
+	  switch(m_type) {
+	  case 1 /* MAC Address */:
+	    if(m_len == 6)
+	      memcpy(flow->protos.mikrotik.mac_addr, &payload[offset+4], m_len);
+	    break;
+	  case 5 /* Identity */:
+	    snprintf(flow->protos.mikrotik.identity, sizeof(flow->protos.mikrotik.identity), 
+		     "%.*s", m_len, &payload[offset+4]);
+	    break;
+	  case 7 /* Version */:
+	    snprintf(flow->protos.mikrotik.version, sizeof(flow->protos.mikrotik.version), 
+		     "%.*s", m_len, &payload[offset+4]);
+	    break;
+	  case 10: /* Uptime */
+	    if(m_len == 4)
+	      flow->protos.mikrotik.uptime = ntohl(*((u_int32_t*)&payload[offset+4]));
+	    break;
+	  case 11: /* Software-ID */
+	    snprintf(flow->protos.mikrotik.sw_id, sizeof(flow->protos.mikrotik.sw_id), 
+		     "%.*s", m_len, &payload[offset+4]);
+	    break;
+	  case 12: /* Board */
+	    snprintf(flow->protos.mikrotik.board, sizeof(flow->protos.mikrotik.board), 
+		     "%.*s", m_len, &payload[offset+4]);
+	    break;
+	  case 15: /* IPv6 */
+	    if(m_len == 16)
+	      memcpy(&flow->protos.mikrotik.ipv6_addr, &payload[offset+4], m_len);
+	    break;
+	  case 16: /* Interface Name */
+	    snprintf(flow->protos.mikrotik.iface_name, sizeof(flow->protos.mikrotik.iface_name), 
+		     "%.*s", m_len, &payload[offset+4]);
+	    break;
+	  case 14: /* IPv4 */
+	    if(m_len == 4)
+	      flow->protos.mikrotik.ipv4_addr = ntohl(*((u_int32_t*)&payload[offset+4]));
+	    break;
+	  }
+      
+	  offset += 4 + m_len;
+	} else
+	  break;
+      } /* while */
+    
+      ndpi_set_detected_protocol(ndpi_struct, flow,
+				 NDPI_PROTOCOL_MIKROTIK,
+				 NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
+    }
+  } else
+    NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+}
+
+/* ********************************* */
+
+void init_mikrotik_dissector(struct ndpi_detection_module_struct *ndpi_struct,
+			     u_int32_t *id) {
+  ndpi_set_bitmask_protocol_detection("MIKROTIK", ndpi_struct,
+				      *id, NDPI_PROTOCOL_MIKROTIK, ndpi_search_mikrotik,
+				      NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_UDP_WITH_PAYLOAD,
+				      SAVE_DETECTION_BITMASK_AS_UNKNOWN,
+				      ADD_TO_DETECTION_BITMASK);
+
+  *id += 1;
+}