Add Paltalk protocol support (#2606)

5 files changed, 85 insertions, 0 deletions

diff --git a/src/include/ndpi_private.h b/src/include/ndpi_private.h
index 362e6aaf0..4e8932687 100644
--- a/src/include/ndpi_private.h
+++ b/src/include/ndpi_private.h
@@ -963,6 +963,7 @@ void init_atg_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int3
 void init_trdp_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id);
 void init_lustre_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id);
 void init_dingtalk_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id);
+void init_paltalk_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 2fab72895..4b1601e33 100644
--- a/src/include/ndpi_protocol_ids.h
+++ b/src/include/ndpi_protocol_ids.h
@@ -460,6 +460,7 @@ typedef enum {
   NDPI_PROTOCOL_WINDSCRIBE            = 429,
   NDPI_PROTOCOL_SONOS                 = 430,
   NDPI_PROTOCOL_DINGTALK              = 431,
+  NDPI_PROTOCOL_PALTALK               = 432,
 
 #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 6c834bd2d..788fe36f2 100644
--- a/src/lib/ndpi_content_match.c.inc
+++ b/src/lib/ndpi_content_match.c.inc
@@ -1695,6 +1695,9 @@ static ndpi_protocol_match host_match[] =
 
    { "dingtalk.com",                     "DingTalk", NDPI_PROTOCOL_DINGTALK, NDPI_PROTOCOL_CATEGORY_CHAT, NDPI_PROTOCOL_ACCEPTABLE, NDPI_PROTOCOL_DEFAULT_LEVEL },
 
+   { "paltalk.com",                      "Paltalk", NDPI_PROTOCOL_PALTALK, NDPI_PROTOCOL_CATEGORY_CHAT, NDPI_PROTOCOL_ACCEPTABLE, NDPI_PROTOCOL_DEFAULT_LEVEL },
+   { "paltalkconnect.com",               "Paltalk", NDPI_PROTOCOL_PALTALK, NDPI_PROTOCOL_CATEGORY_CHAT, NDPI_PROTOCOL_ACCEPTABLE, 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 d8e46875f..5298f8291 100644
--- a/src/lib/ndpi_main.c
+++ b/src/lib/ndpi_main.c
@@ -2391,6 +2391,10 @@ static void ndpi_init_protocol_defaults(struct ndpi_detection_module_struct *ndp
 			  "DingTalk", NDPI_PROTOCOL_CATEGORY_CHAT,
 			  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_PALTALK,
+			  "Paltalk", NDPI_PROTOCOL_CATEGORY_CHAT,
+			  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"
@@ -6386,6 +6390,9 @@ static int ndpi_callback_init(struct ndpi_detection_module_struct *ndpi_str) {
   /* DingTalk */
   init_dingtalk_dissector(ndpi_str, &a);
 
+  /* Paltalk */
+  init_paltalk_dissector(ndpi_str, &a);
+
 #ifdef CUSTOM_NDPI_PROTOCOLS
 #include "../../../nDPI-custom/custom_ndpi_main_init.c"
 #endif
diff --git a/src/lib/protocols/paltalk.c b/src/lib/protocols/paltalk.c
new file mode 100644
index 000000000..ecf147bf7
--- /dev/null
+++ b/src/lib/protocols/paltalk.c
@@ -0,0 +1,73 @@
+/*
+ * paltalk.c
+ *
+ * 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_PALTALK
+
+#include "ndpi_api.h"
+#include "ndpi_private.h"
+
+static void ndpi_int_paltalk_add_connection(struct ndpi_detection_module_struct *ndpi_struct,
+                                            struct ndpi_flow_struct *flow)
+{
+  NDPI_LOG_INFO(ndpi_struct, "found Paltalk\n");
+  ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_PALTALK, NDPI_PROTOCOL_UNKNOWN,
+                             NDPI_CONFIDENCE_DPI);
+}
+
+static void ndpi_search_paltalk(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 Paltalk\n");
+
+  if (packet->payload_packet_len == 20 && get_u_int32_t(packet->payload, 8) == htonl(0x020001) &&
+      get_u_int32_t(packet->payload, 16) == htonl(0x5AFDFFFF))
+  {
+    ndpi_int_paltalk_add_connection(ndpi_struct, flow);
+    return;
+  }
+
+  if (packet->payload_packet_len == 22 && get_u_int32_t(packet->payload, 2) == htonl(0x24C2E80B) &&
+      get_u_int32_t(packet->payload, 17) == htonl(0x5B732B00))
+  {
+    ndpi_int_paltalk_add_connection(ndpi_struct, flow);
+    return;
+  }
+
+  NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+}
+
+void init_paltalk_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id)
+{
+  ndpi_set_bitmask_protocol_detection("Paltalk", ndpi_struct, *id,
+              NDPI_PROTOCOL_PALTALK,
+              ndpi_search_paltalk,
+              NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
+              SAVE_DETECTION_BITMASK_AS_UNKNOWN,
+              ADD_TO_DETECTION_BITMASK);
+
+  *id += 1;
+}