From Holger Freyther via bug 4841:

Add a new dissector for the NexusWare C7 MTP over UDP/TCP protocol. One of
NexusWare's example applications provide a way to forward MTP Level 3 messages
via UDP/TCP. This is a dissector for this protocol (which is lacking an IANA
assigned port).

svn path=/trunk/; revision=33082

1 files changed, 156 insertions, 0 deletions

diff --git a/epan/dissectors/packet-nwmtp.c b/epan/dissectors/packet-nwmtp.c
new file mode 100644
index 0000000000..0093462362
--- /dev/null
+++ b/epan/dissectors/packet-nwmtp.c
@@ -0,0 +1,156 @@
+/* packet-nwmtp.c
+ * Routines for NexusWare MTP3 over UDP transport
+ * Copyright 2010 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * Copyright 2010 by On-Waves
+ *
+ * $Id$
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <glib.h>
+
+#include <epan/packet.h>
+
+
+static dissector_handle_t mtp_handle;
+static gint proto_nwmtp = -1;
+
+static int hf_nwmtp_transp_type = -1;
+static int hf_nwmtp_user_context = -1;
+static int hf_nwmtp_data_type = -1;
+static int hf_nwmtp_data_index = -1;
+static int hf_nwmtp_data_length = -1;
+
+/* subtree pointer */
+static gint ett_mwmtp = -1;
+
+static const value_string nwmtp_transport_type_vals[] = {
+	{ 2,	    "UDP" },
+	{ 3,	    "TCP" },
+	{ 0,	    NULL  },
+};
+
+static const value_string nwmtp_data_type_vals[] = {
+	{ 0,	    "MSU Prio 0" },
+	{ 1,	    "MSU Prio 1" },
+	{ 2,	    "MSU Prio 2" },
+	{ 3,	    "MSU Prio 3" },
+	{16,	    "Retrieved MSU Prio 0" },
+	{17,	    "Retrieved MSU Prio 0" },
+	{18,	    "Retrieved MSU Prio 0" },
+	{32,	    "Retrieval complete"   },
+	{33,	    "Retrieval impossible" },
+	{ 0,	    NULL },
+};
+
+static void dissect_nwmtp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+	int offset = 0;
+
+	col_set_str(pinfo->cinfo, COL_PROTOCOL, "NW MTP");
+	col_clear(pinfo->cinfo, COL_INFO);
+
+	while (tvb_reported_length_remaining(tvb, offset) > 0) {
+		proto_item *ti;
+		proto_item *nwmtp_tree;
+		guint32 len;
+		tvbuff_t *next_tvb;
+
+		len = tvb_get_ntohl(tvb, offset + 8);
+
+		if (tree) {
+			ti = proto_tree_add_protocol_format(tree, proto_nwmtp,
+					tvb, offset, len + 12,
+					"NexusWare C7 UDP Protocol");
+
+			nwmtp_tree = proto_item_add_subtree(ti, ett_mwmtp);
+			proto_tree_add_item(nwmtp_tree, hf_nwmtp_transp_type,
+					    tvb, offset, 1, FALSE);
+			proto_tree_add_item(nwmtp_tree, hf_nwmtp_data_type,
+					    tvb, offset + 1, 1, FALSE);
+			proto_tree_add_item(nwmtp_tree, hf_nwmtp_data_index,
+					    tvb, offset + 2, 2, FALSE);
+			proto_tree_add_item(nwmtp_tree, hf_nwmtp_user_context,
+					    tvb, offset + 4, 4, FALSE);
+			proto_tree_add_item(nwmtp_tree, hf_nwmtp_data_length,
+					    tvb, offset + 8, 4, FALSE);
+		}
+
+		next_tvb = tvb_new_subset(tvb, offset + 12, len, len);
+		call_dissector(mtp_handle, next_tvb, pinfo, tree);
+		offset += len + 12; 
+	}
+}
+
+void proto_register_mwmtp(void)
+{
+	static hf_register_info hf[] = {
+		{&hf_nwmtp_transp_type,
+		 {"Transport Type", "nwmtp.transp_type",
+		  FT_UINT8, BASE_DEC, VALS(nwmtp_transport_type_vals), 0x0,
+		  "The Transport Type", HFILL}
+		},
+		{&hf_nwmtp_data_type,
+		 {"Data Type", "nwmtp.data_type",
+		  FT_UINT8, BASE_DEC, VALS(nwmtp_data_type_vals), 0x0,
+		  "The Data Type", HFILL}
+		},
+		{&hf_nwmtp_data_index,
+		 {"Link Index", "nwmtp.link_index",
+		  FT_UINT16, BASE_DEC, NULL, 0x0,
+		  "Link Index", HFILL}
+		},
+		{&hf_nwmtp_user_context,
+		 {"User Context", "nwmtp.user_context",
+		  FT_UINT32, BASE_DEC, NULL, 0x0,
+		  "Use Context", HFILL}
+		},
+		{&hf_nwmtp_data_length,
+		 {"Length", "nwmtp.data_length",
+		  FT_UINT32, BASE_DEC, NULL, 0x0,
+		  "Data Length", HFILL}
+		},
+	};
+
+	static gint *ett[] = {
+		&ett_mwmtp,
+	};
+
+	proto_nwmtp =
+	     proto_register_protocol("NexusWare C7 MTP", "MTP over NW UDP", "nw_mtp");
+
+	proto_register_field_array(proto_nwmtp, hf, array_length(hf));
+	proto_register_subtree_array(ett, array_length(ett));
+	register_dissector("nw_mtp", dissect_nwmtp, proto_nwmtp);
+}
+
+void proto_reg_handoff_nwmtp(void)
+{
+	dissector_handle_t nwmtp_handle;
+
+	nwmtp_handle = create_dissector_handle(dissect_nwmtp, proto_nwmtp);
+	/* For decode as */
+	dissector_add_handle("udp.port", nwmtp_handle);
+	mtp_handle = find_dissector("mtp3");
+}