1 files changed, 115 insertions, 0 deletions
diff --git a/src/lib/protocols/blizzard.c b/src/lib/protocols/blizzard.c
new file mode 100644
index 000000000..8bb6ec305
--- /dev/null
+++ b/src/lib/protocols/blizzard.c
@@ -0,0 +1,115 @@
+/*
+* blizzard.c
+* 
+* Copyright (C) 2015 - Matteo Bracci <matteobracci1@gmail.com>
+* Copyright (C) 2015-22 - 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_BLIZZARD
+
+#include "ndpi_api.h"
+#include "ndpi_private.h"
+
+
+static void search_blizzard_tcp(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 Blizzard\n");
+
+  /* Generic Battle.net traffic */
+  if(flow->guessed_protocol_id_by_ip == NDPI_PROTOCOL_BLIZZARD &&
+     flow->s_port == htons(1119)) {
+    /* Looking for the first pkt sent by the client.
+       Sometimes the server sent a packet earlier */
+    if(current_pkt_from_client_to_server(ndpi_struct, flow)) {
+      if(ndpi_match_strprefix(packet->payload, packet->payload_packet_len, "\x41\x00\x00\x0a\x66\x52\xed\xc6")) {
+        NDPI_LOG_INFO(ndpi_struct, "Found Blizzard\n");
+        ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_BLIZZARD, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
+        return;
+      }
+    } else if(flow->packet_direction_counter[packet->packet_direction] == 1) {
+      return;
+    }
+  }
+
+  /* Pattern found on Hearthstone */
+  if(packet->payload_packet_len >= 8 &&
+     le32toh(*(uint32_t *)&packet->payload[4]) == (u_int32_t)(packet->payload_packet_len - 8)) {
+    NDPI_LOG_INFO(ndpi_struct, "Found Blizzard\n");
+    ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_BLIZZARD, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
+    return;
+  }
+
+  NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+}
+
+static void search_blizzard_udp(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 Blizzard\n");
+
+  /* Patterns found on Warcraft Rumble */
+
+  /* The last bytes are some kind of sequence number, always starting from 1 */
+  if(/* First pkt send by the client */
+     (packet->payload_packet_len == 18 &&
+      le32toh(*(uint32_t *)&packet->payload[14]) == 1) ||
+     /* First pkt send by the server */
+     (packet->payload_packet_len == 15 &&
+      packet->payload[14] == 1)) {
+    NDPI_LOG_INFO(ndpi_struct, "Found Blizzard\n");
+    ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_BLIZZARD, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
+    return;
+  }
+  /* First pkt send by the client */
+  if(packet->payload_packet_len == 23 &&
+     ndpi_match_strprefix(packet->payload, packet->payload_packet_len, "\xff\xff\xff\xff\xa3\x1f\xb6\x1e\x00\x00\x40\x01\x00\x00\x00\x00\x00\x00\x00\x04\x03\x02\x01")) {
+    NDPI_LOG_INFO(ndpi_struct, "Found Blizzard\n");
+    ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_BLIZZARD, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
+    return;
+  }
+
+  /* TODO: other patterns */
+
+  /* TODO: should we remove WoW dissector, update it and move the new code here? */
+
+  NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+}
+
+static void ndpi_search_blizzard(struct ndpi_detection_module_struct* ndpi_struct, struct ndpi_flow_struct* flow)
+{
+  if(flow->l4_proto == IPPROTO_TCP)
+    search_blizzard_tcp(ndpi_struct, flow);
+  else
+    search_blizzard_udp(ndpi_struct, flow);
+}
+
+void init_blizzard_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id)
+{
+  ndpi_set_bitmask_protocol_detection("Blizzard", ndpi_struct, *id,
+				      NDPI_PROTOCOL_BLIZZARD, ndpi_search_blizzard,
+				      NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_OR_UDP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
+				      SAVE_DETECTION_BITMASK_AS_UNKNOWN,
+				      ADD_TO_DETECTION_BITMASK);
+
+  *id += 1;
+}
+