From e240bbd4a4dfa34bd166ed5e9ae19a060ae42981 Mon Sep 17 00:00:00 2001
From: Luca Deri <deri@ntop.org>
Date: Wed, 7 Nov 2018 22:43:33 +0100
Subject: Implemented UPnP dissector

---
 src/lib/protocols/upnp.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 src/lib/protocols/upnp.c

(limited to 'src/lib/protocols/upnp.c')

diff --git a/src/lib/protocols/upnp.c b/src/lib/protocols/upnp.c
new file mode 100644
index 000000000..1706d021d
--- /dev/null
+++ b/src/lib/protocols/upnp.c
@@ -0,0 +1,65 @@
+/*
+ * upnp.c
+ *
+ * Copyright (C) 2018 - 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_UPNP
+
+#include "ndpi_api.h"
+
+#define UPNP_PORT 3702
+
+void ndpi_search_upnp(struct ndpi_detection_module_struct *ndpi_struct,
+		      struct ndpi_flow_struct *flow) {
+  struct ndpi_packet_struct *packet = &flow->packet;
+
+  NDPI_LOG_DBG(ndpi_struct, "search upnp\n");
+
+  if(packet->udp
+     && (
+	 (packet->iph && ((ntohl(packet->iph->daddr) & 0xF0000000) == 0xE0000000 /* A multicast address */))
+#ifdef NDPI_DETECTION_SUPPORT_IPV6
+	 ||
+	 (packet->iphv6 && ntohl(packet->iphv6->ip6_dst.u6_addr.u6_addr32[0]) == 0xFF020000)
+#endif
+	 )
+     && (ntohs(packet->udp->dest) == UPNP_PORT)
+     && (packet->payload_packet_len >= 40)
+     && (strncmp((char*)packet->payload, "<?xml", 5) == 0)
+     ) {
+    NDPI_LOG_INFO(ndpi_struct,"found teredo\n");
+    ndpi_int_change_protocol(ndpi_struct, flow, NDPI_PROTOCOL_UPNP, NDPI_PROTOCOL_UNKNOWN);
+  } else {
+    NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+  }
+}
+
+
+void init_upnp_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id,
+			 NDPI_PROTOCOL_BITMASK *detection_bitmask) {
+  ndpi_set_bitmask_protocol_detection("UPNP", ndpi_struct, detection_bitmask, *id,
+				      NDPI_PROTOCOL_UPNP,
+				      ndpi_search_upnp,
+				      NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_UDP_WITH_PAYLOAD,
+				      SAVE_DETECTION_BITMASK_AS_UNKNOWN,
+				      ADD_TO_DETECTION_BITMASK);
+  *id += 1;
+}
+
-- 
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