1 files changed, 102 insertions, 0 deletions
diff --git a/src/lib/protocols/oicq.c b/src/lib/protocols/oicq.c
new file mode 100644
index 000000000..6a1dd4894
--- /dev/null
+++ b/src/lib/protocols/oicq.c
@@ -0,0 +1,102 @@
+/*
+ * oicq.c
+ *
+ * OICQ / Tencent QQ
+ *
+ * Copyright (C) 2023 - 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_OICQ
+
+#include "ndpi_api.h"
+
+PACK_ON
+struct oicq_hdr {
+  uint8_t flag;
+  uint16_t version;
+  uint16_t command;
+  uint16_t sequence;
+} PACK_OFF;
+
+static void ndpi_int_oicq_add_connection(struct ndpi_detection_module_struct * const ndpi_struct,
+                                         struct ndpi_flow_struct * const flow)
+{
+  NDPI_LOG_INFO(ndpi_struct, "found OICQ\n");
+
+  ndpi_set_detected_protocol(ndpi_struct, flow,
+                             NDPI_PROTOCOL_OICQ,
+                             NDPI_PROTOCOL_UNKNOWN,
+                             NDPI_CONFIDENCE_DPI);
+}
+
+/* ***************************************************** */
+
+static void ndpi_search_oicq(struct ndpi_detection_module_struct *ndpi_struct,
+                             struct ndpi_flow_struct *flow)
+{
+  struct ndpi_packet_struct const * const packet = &ndpi_struct->packet;
+  struct oicq_hdr const * const hdr = (struct oicq_hdr *)&packet->payload[0];
+
+  NDPI_LOG_DBG(ndpi_struct, "search OICQ\n");
+
+  if (packet->payload_packet_len < sizeof(*hdr))
+  {
+    NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+    return;
+  }
+
+  if (hdr->flag != 0x02)
+  {
+    NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+    return;
+  }
+
+  if (ntohs(hdr->version) != 0x3b0b)
+  {
+    NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+    return;
+  }
+
+  uint16_t command = ntohs(hdr->command);
+  if (command == 0x0000 || (command > 0x00b5 && command < 0x03f7) ||
+      command > 0x03f7)
+  {
+    NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+    return;
+  }
+
+  ndpi_int_oicq_add_connection(ndpi_struct, flow);
+}
+
+/* ***************************************************** */
+  
+void init_oicq_dissector(struct ndpi_detection_module_struct *ndpi_struct,
+                         u_int32_t *id)
+{
+  ndpi_set_bitmask_protocol_detection("OICQ", ndpi_struct, *id,
+                                      NDPI_PROTOCOL_OICQ,
+                                      ndpi_search_oicq,
+                                      NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_UDP_WITH_PAYLOAD,
+                                      SAVE_DETECTION_BITMASK_AS_UNKNOWN,
+                                      ADD_TO_DETECTION_BITMASK
+                                     );
+
+  *id += 1;
+}