Add detection of Gaijin Entertainment games (#2311)

* Add detection of Gaijin Entertainment games

* Short NDPI_PROTOCOL_GAIJINENTERTAINMENT to NDPI_PROTOCOL_GAIJIN

* Add default UDP port for Gaijin Entertainment games

* Remove NDPI_PROTOCOL_CROSSOUT protocol id

5 files changed, 95 insertions, 0 deletions

diff --git a/src/include/ndpi_private.h b/src/include/ndpi_private.h
index 25a62cbab..a88b0c43a 100644
--- a/src/include/ndpi_private.h
+++ b/src/include/ndpi_private.h
@@ -768,6 +768,7 @@ void init_raft_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int
 void init_cip_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id);
 void init_gearman_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id);
 void init_tencent_games_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id);
+void init_gaijin_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id);
 
 #endif
 
diff --git a/src/include/ndpi_protocol_ids.h b/src/include/ndpi_protocol_ids.h
index 43b7c15f8..7e25f177b 100644
--- a/src/include/ndpi_protocol_ids.h
+++ b/src/include/ndpi_protocol_ids.h
@@ -424,6 +424,7 @@ typedef enum {
   NDPI_PROTOCOL_CIP                   = 393,
   NDPI_PROTOCOL_GEARMAN               = 394,
   NDPI_PROTOCOL_TENCENTGAMES          = 395,
+  NDPI_PROTOCOL_GAIJIN                = 396,
 
 #ifdef CUSTOM_NDPI_PROTOCOLS
 #include "../../../nDPI-custom/custom_ndpi_protocol_ids.h"
diff --git a/src/lib/ndpi_content_match.c.inc b/src/lib/ndpi_content_match.c.inc
index 051e44d07..148a3583f 100644
--- a/src/lib/ndpi_content_match.c.inc
+++ b/src/lib/ndpi_content_match.c.inc
@@ -1604,6 +1604,12 @@ static ndpi_protocol_match host_match[] =
    { "dota2.com",                        "Dota2",                 NDPI_PROTOCOL_DOTA2, NDPI_PROTOCOL_CATEGORY_GAME, NDPI_PROTOCOL_FUN, NDPI_PROTOCOL_DEFAULT_LEVEL },
    { "publist.mumble.info",              "Mumble",                NDPI_PROTOCOL_MUMBLE, NDPI_PROTOCOL_CATEGORY_VOIP, NDPI_PROTOCOL_FUN, NDPI_PROTOCOL_DEFAULT_LEVEL },
 
+   /* Gaijin Entertainment */
+   { ".gaijin.net", "GaijinEntertainment", NDPI_PROTOCOL_GAIJIN, NDPI_PROTOCOL_CATEGORY_GAME, NDPI_PROTOCOL_FUN, NDPI_PROTOCOL_DEFAULT_LEVEL },
+   { ".gaijinent.com", "GaijinEntertainment", NDPI_PROTOCOL_GAIJIN, NDPI_PROTOCOL_CATEGORY_GAME, NDPI_PROTOCOL_FUN, NDPI_PROTOCOL_DEFAULT_LEVEL },
+   { ".crossout.net", "GaijinEntertainment", NDPI_PROTOCOL_GAIJIN, NDPI_PROTOCOL_CATEGORY_GAME, NDPI_PROTOCOL_FUN, NDPI_PROTOCOL_DEFAULT_LEVEL },
+   { ".warthunder.com", "GaijinEntertainment", NDPI_PROTOCOL_GAIJIN, NDPI_PROTOCOL_CATEGORY_GAME, NDPI_PROTOCOL_FUN, NDPI_PROTOCOL_DEFAULT_LEVEL },
+
 #ifdef CUSTOM_NDPI_PROTOCOLS
 #include "../../../nDPI-custom/custom_ndpi_content_match_host_match.c.inc"
 #endif
diff --git a/src/lib/ndpi_main.c b/src/lib/ndpi_main.c
index a99f6530d..96c7e7cb5 100644
--- a/src/lib/ndpi_main.c
+++ b/src/lib/ndpi_main.c
@@ -2234,6 +2234,10 @@ static void ndpi_init_protocol_defaults(struct ndpi_detection_module_struct *ndp
 			  "TencentGames", NDPI_PROTOCOL_CATEGORY_GAME,
 			  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_FUN, NDPI_PROTOCOL_GAIJIN,
+			  "GaijinEntertainment", NDPI_PROTOCOL_CATEGORY_GAME,
+			  ndpi_build_default_ports(ports_a, 0, 0, 0, 0, 0) /* TCP */,
+			  ndpi_build_default_ports(ports_b, 20011, 0, 0, 0, 0) /* UDP */);
 
 #ifdef CUSTOM_NDPI_PROTOCOLS
 #include "../../../nDPI-custom/custom_ndpi_main.c"
@@ -6035,6 +6039,9 @@ static int ndpi_callback_init(struct ndpi_detection_module_struct *ndpi_str) {
   /* Tencent Games */
   init_tencent_games_dissector(ndpi_str, &a);
 
+  /* Gaijin Entertainment */
+  init_gaijin_dissector(ndpi_str, &a);
+
 #ifdef CUSTOM_NDPI_PROTOCOLS
 #include "../../../nDPI-custom/custom_ndpi_main_init.c"
 #endif
diff --git a/src/lib/protocols/gaijin_entertainment.c b/src/lib/protocols/gaijin_entertainment.c
new file mode 100644
index 000000000..c0f12ff03
--- /dev/null
+++ b/src/lib/protocols/gaijin_entertainment.c
@@ -0,0 +1,80 @@
+/*
+ * gaijin_entertainment.c
+ *
+ * Copyright (C) 2024 - ntop.org
+ * Copyright (C) 2024 - V.G <jacendi@protonmail.com>
+ *
+ * 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_GAIJIN
+
+#include "ndpi_api.h"
+#include "ndpi_private.h"
+
+static void ndpi_int_gaijin_add_connection(struct ndpi_detection_module_struct *ndpi_struct, 
+                                           struct ndpi_flow_struct *flow)
+{
+  NDPI_LOG_INFO(ndpi_struct, "found Gaijin Entertainment\n");
+  ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_GAIJIN,
+                             NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
+}
+
+static void ndpi_search_gaijin(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 Gaijin Entertainment\n");
+
+  if (packet->payload_packet_len == 52 &&
+      packet->payload[2] == 0 &&
+      ntohs(get_u_int16_t(packet->payload, 0)) == 0x8FFF &&
+      ntohl(get_u_int32_t(packet->payload, 4)) == 0x82FF0001)
+  {
+    ndpi_int_gaijin_add_connection(ndpi_struct, flow);
+    return;
+  }
+
+  if (packet->payload_packet_len > 100) {
+    if (memcmp(packet->payload, "embeddedupdater.", NDPI_STATICSTRING_LEN("embeddedupdater.")) == 0 ||
+        memcmp(packet->payload, "app.start", NDPI_STATICSTRING_LEN("app.start")) == 0 ||
+        memcmp(packet->payload, "app.stage", NDPI_STATICSTRING_LEN("app.stage")) == 0)
+    {
+      ndpi_int_gaijin_add_connection(ndpi_struct, flow);
+      return;
+    }
+  }
+
+  NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+}
+
+void init_gaijin_dissector(struct ndpi_detection_module_struct *ndpi_struct,
+                                         u_int32_t *id)
+{
+  ndpi_set_bitmask_protocol_detection("GaijinEntertainment", ndpi_struct, *id,
+                                      NDPI_PROTOCOL_GAIJIN,
+                                      ndpi_search_gaijin,
+                                      NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_UDP_WITH_PAYLOAD,
+                                      SAVE_DETECTION_BITMASK_AS_UNKNOWN,
+                                      ADD_TO_DETECTION_BITMASK);
+
+  *id += 1;
+}