added start of tns dissector

svn path=/trunk/; revision=1155

1 files changed, 229 insertions, 0 deletions

diff --git a/packet-tns.c b/packet-tns.c
new file mode 100644
index 0000000000..6db58407ef
--- /dev/null
+++ b/packet-tns.c
@@ -0,0 +1,229 @@
+/* packet-tns.c
+ * Routines for MSX tns packet dissection
+ *
+ * $Id: packet-tns.c,v 1.1 1999/11/29 19:43:26 nneul Exp $
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@unicom.net>
+ * Copyright 1998 Gerald Combs
+ *
+ * Copied from packet-tftp.c
+ * 
+ * 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 <stdio.h>
+
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+
+#ifdef HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
+
+#include <string.h>
+#include <glib.h>
+#include "packet.h"
+#include "packet-tns.h"
+
+static int proto_tns = -1;
+static int hf_tns_request = -1;
+static int hf_tns_response = -1;
+static int hf_tns_length = -1;
+static int hf_tns_packet_checksum = -1;
+static int hf_tns_header_checksum = -1;
+static int hf_tns_packet_type = -1;
+static int hf_tns_reserved_byte = -1;
+
+static gint ett_tns = -1;
+
+static const value_string tns_type_vals[] = {
+		{TNS_TYPE_CONNECT, "Connect" },
+		{TNS_TYPE_ACCEPT, "Accept" },
+		{TNS_TYPE_DATA, "Data" },
+		{TNS_TYPE_RESEND, "Resend"},
+        {0, NULL}
+};
+
+
+/* Handy macro for checking for truncated packet */
+#define TRUNC(length) if ( ! BYTES_ARE_IN_FRAME(offset, length)) { \
+			dissect_data(pd,offset,fd,tree); return; }
+
+void dissect_tns_data(const u_char *pd, int offset, frame_data *fd, 
+	proto_tree *tree)
+{
+	dissect_data(pd,offset,fd,tree);
+	return;
+}
+
+void dissect_tns_connect(const u_char *pd, int offset, frame_data *fd, 
+	proto_tree *tree)
+{
+	dissect_data(pd,offset,fd,tree);
+	return;
+}
+
+void dissect_tns_accept(const u_char *pd, int offset, frame_data *fd, 
+	proto_tree *tree)
+{
+	dissect_data(pd,offset,fd,tree);
+	return;
+}
+
+
+void
+dissect_tns(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
+{
+	proto_tree      *tns_tree, *ti;
+	guint16 length;
+	guint16 type;
+
+	if (check_col(fd, COL_PROTOCOL))
+	col_add_str(fd, COL_PROTOCOL, "TNS");
+
+	if (check_col(fd, COL_INFO))
+	{
+		col_add_fstr(fd, COL_INFO, "%s", 
+			(pi.match_port == pi.destport) ? "Request" : "Response");	  
+	}
+
+	if (tree) 
+	{
+		ti = proto_tree_add_item(tree, proto_tns, offset, END_OF_FRAME, NULL);
+		tns_tree = proto_item_add_subtree(ti, ett_tns);
+
+		if (pi.match_port == pi.destport)
+		{
+			proto_tree_add_item_hidden(tns_tree, hf_tns_request,
+			   offset, END_OF_FRAME, TRUE);
+			proto_tree_add_text(tns_tree, offset, 
+				END_OF_FRAME, "Request: <opaque data>" );
+		}
+		else
+		{
+			proto_tree_add_item_hidden(tns_tree, hf_tns_response,
+				offset, END_OF_FRAME, TRUE);
+			proto_tree_add_text(tns_tree, offset, 
+				END_OF_FRAME, "Response: <opaque data>");
+		}
+	}
+
+		/* check to make sure length is present */
+	if ( ! BYTES_ARE_IN_FRAME(offset, 2)) return;
+
+	length = pntohs(&pd[offset]);
+	if (tree)
+	{
+		proto_tree_add_item(tns_tree, hf_tns_length,
+			offset, 2, length);
+	}
+	TRUNC(length);
+	offset += 2;
+
+	TRUNC(2);
+	if ( tree )
+	{
+		proto_tree_add_item(tns_tree, hf_tns_packet_checksum,
+			offset, 2, pntohs(&pd[offset]));
+	}
+	offset += 2;
+
+	TRUNC(2);
+	type = pd[offset];
+	if ( tree )
+	{
+		proto_tree_add_item(tns_tree, hf_tns_packet_type,
+			offset, 1, type);
+	}
+	offset += 1;
+
+	if ( check_col(fd, COL_INFO))
+	{
+		col_append_fstr(fd, COL_INFO, ", %s (%d)",
+			val_to_str(type, tns_type_vals, "Unknown"), type);
+	}
+
+	TRUNC(1);
+	if ( tree )
+	{
+		proto_tree_add_item(tns_tree, hf_tns_reserved_byte,
+			offset, 1, &pd[offset]);
+	}
+	offset += 1;
+
+	TRUNC(2);
+	if ( tree )
+	{
+		proto_tree_add_item(tns_tree, hf_tns_header_checksum,
+			offset, 2, pntohs(&pd[offset]));
+	}
+	offset += 2;
+
+	switch (type)
+	{
+		case TNS_TYPE_CONNECT:
+			dissect_tns_connect(pd,offset,fd,tree);
+			break;
+		case TNS_TYPE_ACCEPT:
+			dissect_tns_accept(pd,offset,fd,tree);
+			break;
+		case TNS_TYPE_DATA:
+			dissect_tns_data(pd,offset,fd,tree);
+			break;
+		default:
+			dissect_data(pd,offset,fd,tree);
+	}
+}
+
+void proto_register_tns(void)
+{
+	static hf_register_info hf[] = {
+		{ &hf_tns_response, { 
+			"Response", "tns.response", FT_BOOLEAN, BASE_NONE, 
+			NULL, 0x0, "TRUE if TNS response" }},
+		{ &hf_tns_request, { 
+			"Request", "tns.request", FT_BOOLEAN, BASE_NONE, 
+			NULL, 0x0, "TRUE if TNS request" }},
+		{ &hf_tns_length, { 	
+			"Packet Length", "tns.length", FT_UINT32, BASE_NONE, 
+			NULL, 0x0, "Length of TNS packet" }},
+		{ &hf_tns_packet_checksum, { 	
+			"Packet Checksum", "tns.packet_checksum", FT_UINT16, BASE_HEX, 
+			NULL, 0x0, "Checksum of Packet Data" }},
+		{ &hf_tns_header_checksum, { 	
+			"Header Checksum", "tns.header_checksum", FT_UINT16, BASE_HEX, 
+			NULL, 0x0, "Checksum of Header Data" }},
+		{ &hf_tns_reserved_byte, { 	
+			"Reserved Byte", "tns.reserved_byte", FT_BYTES, BASE_HEX, 
+			NULL, 0x0, "Reserved Byte" }},
+		{ &hf_tns_packet_type, { 	
+			"Packet Type", "tns.type", FT_UINT8, BASE_NONE, 
+			VALS(tns_type_vals), 0x0, "Type of TNS packet" }}	
+	};
+
+	static gint *ett[] = {
+		&ett_tns,
+	};
+	proto_tns = proto_register_protocol(
+		"Transparent Network Substrate Protocol", "tns");
+	proto_register_field_array(proto_tns, hf, array_length(hf));
+	proto_register_subtree_array(ett, array_length(ett));
+}