Add some rudimentary dissector for what seems to be

Telkonets ethernet over powerline communication protocol.

svn path=/trunk/; revision=18333

epan/dissectors/Makefile.common

@@ -617,6 +617,7 @@ DISSECTOR_SRC =	\
 	packet-telnet.c	\
 	packet-teredo.c	\
 	packet-text-media.c	\
+	packet-telkonet.c	\
 	packet-tftp.c	\
 	packet-time.c	\
 	packet-tipc.c	\

epan/dissectors/packet-ethertype.c

@@ -95,6 +95,7 @@ const value_string etype_vals[] = {
     {ETHERTYPE_CDMA2000_A10_UBS,	"CDMA2000 A10 Unstructured byte stream" },
     {ETHERTYPE_PROFINET,			"PROFINET"			},
     {ETHERTYPE_AOE,					"ATA over Ethernet"             },
+    {ETHERTYPE_TELKONET,					"Telkonet powerline"    },
     {ETHERTYPE_CSM_ENCAPS,			"CSM_ENCAPS Protocol"             },
     {ETHERTYPE_IEEE802_OUI_EXTENDED, "IEEE 802a OUI Extended Ethertype" },
     {ETHERTYPE_IEC61850_GOOSE,		"IEC 61850/GOOSE" },

epan/dissectors/packet-telkonet.c

@@ -0,0 +1,116 @@
+/* packet-telkonet.c
+ * Routines for ethertype 0x88A1 tunneling dissection
+ *
+ * $Id: packet-telkonet.c 18196 2006-05-21 04:49:01Z sahlberg $
+ *
+ * Copyright 2006 Joerg Mayer (see AUTHORS file)
+ *
+ * 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.
+ */
+
+/* 2do:
+ * - find out more about the real meaning of the 8 bytes
+ *   and possible other packet types
+ * - Telkonet (www.telkonet.com) has registered other ethertypes
+ *   as well: find out what they do
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <glib.h>
+#include <epan/packet.h>
+#include <epan/etypes.h>
+
+static int proto_telkonet = -1;
+static int hf_telkonet_type = -1;
+
+static gint ett_telkonet = -1;
+
+static dissector_handle_t eth_withoutfcs_handle;
+
+typedef enum {
+	TELKONET_TYPE_TUNNEL = 0x78
+} telkonet_type_t;
+
+static const value_string telkonet_type_vals[] = {
+	{ TELKONET_TYPE_TUNNEL,	"tunnel" },
+
+	{ 0x00,	NULL }
+};
+
+static void
+dissect_telkonet(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+	proto_tree *ti, *telkonet_tree;
+	int offset = 0;
+	telkonet_type_t type;
+
+	if (check_col(pinfo->cinfo, COL_PROTOCOL))
+	  col_set_str(pinfo->cinfo, COL_PROTOCOL, "TELKONET");
+	if (check_col(pinfo->cinfo, COL_INFO))
+	  col_clear(pinfo->cinfo, COL_INFO);
+
+	type = tvb_get_guint8(tvb, offset);
+	if (check_col(pinfo->cinfo, COL_INFO)) {
+	  col_add_fstr(pinfo->cinfo, COL_INFO, "Telkonet type: %s",
+		val_to_str(type, telkonet_type_vals, "Unknown (0x%02x)"));
+	}
+
+	telkonet_tree = NULL;
+
+	ti = proto_tree_add_item(tree, proto_telkonet, tvb, 0, 8, FALSE);
+	telkonet_tree = proto_item_add_subtree(ti, ett_telkonet);
+
+	proto_tree_add_item(telkonet_tree, hf_telkonet_type, tvb, 0, 8, FALSE);
+	offset += 8;
+
+	if (type == TELKONET_TYPE_TUNNEL)
+		call_dissector(eth_withoutfcs_handle, tvb_new_subset(tvb, offset, -1, -1),
+			pinfo, tree);
+}
+
+void
+proto_register_telkonet(void)
+{
+	static hf_register_info hf[] = {
+		{ &hf_telkonet_type,
+		{ "Type", "telkonet.type", FT_BYTES, BASE_NONE, NULL,
+			0x0, "TELKONET type", HFILL }},
+	};
+	static gint *ett[] = {
+		&ett_telkonet,
+	};
+
+	proto_telkonet = proto_register_protocol("Telkonet powerline", "TELKONET", "telkonet");
+	proto_register_field_array(proto_telkonet, hf, array_length(hf));
+	proto_register_subtree_array(ett, array_length(ett));
+}
+
+void
+proto_reg_handoff_telkonet(void)
+{
+	dissector_handle_t telkonet_handle;
+
+	eth_withoutfcs_handle = find_dissector("eth_withoutfcs");
+
+	telkonet_handle = create_dissector_handle(dissect_telkonet, proto_telkonet);
+	dissector_add("ethertype", ETHERTYPE_TELKONET, telkonet_handle);
+}

epan/etypes.h

@@ -252,6 +252,10 @@
 #define ETHERTYPE_CSM_ENCAPS	0x889B /* Mindspeed Technologies www.mindspeed.com */
 #endif
 
+#ifndef ETHERTYPE_TELKONET
+#define ETHERTYPE_TELKONET	0x88A1 /* Telkonet powerline ethernet */
+#endif
+
 #ifndef ETHERTYPE_AOE
 #define ETHERTYPE_AOE           0x88A2
 #endif