Dissector for ISUP over TCP.

svn path=/trunk/; revision=14565

1 files changed, 325 insertions, 0 deletions

diff --git a/epan/dissectors/packet-isup_thin.c b/epan/dissectors/packet-isup_thin.c
new file mode 100644
index 0000000000..a6b772563f
--- /dev/null
+++ b/epan/dissectors/packet-isup_thin.c
@@ -0,0 +1,325 @@
+/* packet-isup_thin.c
+ * Routines for ISUP Thin dissection
+ * Copyright 2005, Anders Broman <anders.broman[at]ericsson.com>
+ *
+ * $Id$
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@ethereal.com>
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <glib.h>
+#include <epan/conversation.h>
+
+#ifdef NEED_SNPRINTF_H
+# include "snprintf.h"
+#endif
+
+#include <epan/packet.h>
+#include "prefs.h"
+
+static int ISUP_thinTCPPort = 0;
+static int tcp_port = 0;
+
+/* Initialize the protocol and registered fields */
+static int proto_isup_thin		= -1;
+
+/* Initialize the subtree pointers */
+static int ett_isup_thin					= -1;
+
+static int hf_isup_thin_count_type		= -1;
+static int hf_isup_thin_count			= -1;
+static int hf_isup_thin_message_class	= -1;
+static int hf_isup_thin_version			= -1;
+static int hf_isup_thin_message_type	= -1;
+static int hf_isup_thin_serv_ind		= -1;
+static int hf_isup_thin_subservind		= -1;
+static int hf_isup_thin_priority		= -1;
+static int hf_isup_thin_sls				= -1;
+static int hf_isup_thin_opc				= -1;
+static int hf_isup_thin_dpc				= -1;
+static int hf_isup_thin_oam_message_name_code = -1;
+static int hf_isup_thin_mtp_primitive_message_name_code = -1;
+static int hf_isup_thin_isup_length		= -1;
+
+
+
+static const value_string isup_thin_count_type_vals[] = {
+	{0,		"64 octet count (Not used by t-ISUP)"}, 
+	{1,		"4 octet count"},
+	{ 0,	NULL }
+};
+
+static const value_string isup_thin_message_type_vals[] = {
+	{0,		"OAM Message"}, 
+	{1,		"MTP Primitive"},
+	{2,		"Encapsulated ISUP Message format according to the used ISUP protocol"},
+	{ 0,	NULL }
+};
+
+static const value_string isup_thin_oam_message_name_code_vals[] = {
+	{1,		"Heartbeat"},
+	{ 0,	NULL }
+};
+static const value_string isup_thin_mtp_message_name_code_vals[] = {
+	{1,		"MTP_Pause"},
+	{2,		"MTP_Resume"},
+	{3,		"MTP_UP_Unavailable"},
+	{4,		"MTP_Cong"},
+	{6,		"MTP_Rest"},
+	{7,		"MTP_Rest_End"},
+	{ 0,	NULL }
+};
+
+dissector_handle_t isup_thin_handle;
+dissector_handle_t isup_handle;
+
+
+static int dissect_isup_thin(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
+
+
+
+
+
+/* Code to actually dissect the packets */
+static int
+dissect_isup_thin(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+	proto_item *ti;
+	proto_tree *isup_thin_tree;
+	tvbuff_t *next_tvb;
+	gint offset = 0;
+	gint octet;
+	gint message_type;
+	gint16 isup_message_length;
+
+
+	/* Make entries in Protocol column and Info column on summary display */
+	if (check_col(pinfo->cinfo, COL_PROTOCOL)) 
+		col_set_str(pinfo->cinfo, COL_PROTOCOL, "isup_thin");
+
+	/* Find the end line to be able to process the headers
+	 * Note that in case of [content-stuff] headers and [content-stuff] is separated by CRLF
+	 */
+
+
+
+	if (tree) {
+		ti = proto_tree_add_item(tree, proto_isup_thin, tvb, 0, -1, FALSE);
+		isup_thin_tree = proto_item_add_subtree(ti, ett_isup_thin);
+
+		octet = tvb_get_guint8(tvb,offset);
+		proto_tree_add_item(isup_thin_tree, hf_isup_thin_count_type, tvb, offset, 1, FALSE);
+		proto_tree_add_item(isup_thin_tree, hf_isup_thin_count, tvb, offset, 2, FALSE);
+		offset = offset + 2;
+		proto_tree_add_item(isup_thin_tree, hf_isup_thin_message_class, tvb, offset, 1, FALSE);
+		proto_tree_add_item(isup_thin_tree, hf_isup_thin_version, tvb, offset, 2, FALSE);
+		offset++;
+		message_type = tvb_get_guint8(tvb,offset) & 0x7f ;
+		proto_tree_add_item(isup_thin_tree, hf_isup_thin_message_type, tvb, offset, 1, FALSE);
+		offset++;
+		proto_tree_add_item(isup_thin_tree, hf_isup_thin_serv_ind, tvb, offset, 1, FALSE);
+		/* SubServInd	*/
+		proto_tree_add_item(isup_thin_tree, hf_isup_thin_subservind, tvb, offset, 1, FALSE);
+		/* Priority		*/
+		proto_tree_add_item(isup_thin_tree, hf_isup_thin_priority, tvb, offset, 1, FALSE);
+		offset++;
+		proto_tree_add_item(isup_thin_tree, hf_isup_thin_sls, tvb, offset, 1, FALSE);
+		offset++;
+		proto_tree_add_item(isup_thin_tree, hf_isup_thin_opc, tvb, offset, 3, FALSE);
+		offset = offset +3;
+		proto_tree_add_item(isup_thin_tree, hf_isup_thin_dpc, tvb, offset, 3, FALSE);
+		offset = offset +3;
+
+		/* 12 Bytes off measage header done */
+		switch (message_type) {
+			case 0:
+				/* OAM message */
+				proto_tree_add_item(isup_thin_tree, hf_isup_thin_oam_message_name_code, tvb, offset, 1, FALSE);
+				offset++;
+				break;
+			case 1:
+				/* MTP Primitive */
+				proto_tree_add_item(isup_thin_tree, hf_isup_thin_mtp_primitive_message_name_code, tvb, offset, 1, FALSE);
+				offset++;
+				break;
+			case 2:
+				/*Encapsulated ISUP Message format according to the used ISUP protocol */
+				isup_message_length = tvb_get_ntohs(tvb,offset);
+				proto_tree_add_item(isup_thin_tree, hf_isup_thin_isup_length, tvb, offset, 2, FALSE);
+				offset = offset +2;
+				next_tvb = tvb_new_subset(tvb, offset, isup_message_length, isup_message_length);
+				call_dissector(isup_handle, next_tvb, pinfo, tree);
+				break;
+			default:
+				/* Unknown */
+				return 0;
+		}
+
+
+
+	}/* if tree */
+	return tvb_length(tvb); 
+
+/* If this protocol has a sub-dissector call it here, see section 1.8 */
+}
+
+
+/* Register the protocol with Ethereal */
+/* If this dissector uses sub-dissector registration add a registration routine.
+   This format is required because a script is used to find these routines and
+   create the code that calls these routines.
+*/
+void
+proto_reg_handoff_isup_thin(void)
+{
+	static int Initialized=FALSE;
+	
+	if (!Initialized) {
+		isup_thin_handle = new_create_dissector_handle(dissect_isup_thin, proto_isup_thin);
+		Initialized=TRUE;
+	}else{
+		dissector_delete("tcp.port", tcp_port, isup_thin_handle);
+	}
+
+	tcp_port = ISUP_thinTCPPort;
+
+	dissector_add("tcp.port", tcp_port, isup_thin_handle);
+	isup_handle = find_dissector("isup");
+}
+
+void
+proto_register_isup_thin(void)
+{                 
+
+/* Setup protocol subtree array */
+	static gint *ett[] = {
+		&ett_isup_thin,
+	};
+
+        /* Setup list of header fields */
+	static hf_register_info hf[] = {
+		{ &hf_isup_thin_count_type,
+			{ "Count Type", 		"isup_thin.count.type",
+			FT_UINT8, BASE_DEC,VALS(isup_thin_count_type_vals), 0x80,
+			"Count Type", HFILL }
+		},
+		{ &hf_isup_thin_count,
+			{ "Message length (counted according to bit 0) including the Message Header","isup_thin.count",
+			FT_UINT16, BASE_DEC,NULL, 0x7fff,
+			"Message length", HFILL }
+		},
+		{ &hf_isup_thin_message_class,
+			{ "Message Class","isup_thin.message.class",
+			FT_UINT8, BASE_DEC,NULL, 0xfc,
+			"Message Class", HFILL }
+		},
+		{ &hf_isup_thin_version,
+			{ "Version","isup_thin.count.version",
+			FT_UINT16, BASE_DEC,NULL, 0x0380,
+			"Version", HFILL }
+		},
+		{ &hf_isup_thin_message_type,
+			{ "Message Type", 		"isup_thin.messaget.type",
+			FT_UINT8, BASE_DEC,VALS(isup_thin_message_type_vals), 0x7f,
+			"Message Type", HFILL }
+		},
+		{ &hf_isup_thin_serv_ind,
+			{ "Service Indicator","isup_thin.servind",
+			FT_UINT8, BASE_DEC,NULL, 0xf0,
+			"Service Indicator", HFILL }
+		},
+		{ &hf_isup_thin_subservind,
+			{ "Sub Service Field (Network Indicator)","isup_thin.subservind",
+			FT_UINT8, BASE_DEC,NULL, 0x0c,
+			"Sub Service Field (Network Indicator)", HFILL }
+		},
+		{ &hf_isup_thin_priority,
+			{ "Priority","isup_thin.priority",
+			FT_UINT8, BASE_DEC,NULL, 0x03,
+			"Priority", HFILL }
+		},
+		{ &hf_isup_thin_sls,
+			{ "Signalling Link Selection","isup_thin.sls",
+			FT_UINT8, BASE_DEC,NULL, 0x0,
+			"Signalling Link Selection", HFILL }
+		},
+		{ &hf_isup_thin_opc,
+			{ "Originating Point Code","isup_thin.opc",
+			FT_UINT32, BASE_DEC,NULL, 0x0,
+			"Originating Point Code", HFILL }
+		},
+		{ &hf_isup_thin_dpc,
+			{ "Destination Point Code","isup_thin.dpc",
+			FT_UINT32, BASE_DEC,NULL, 0x0,
+			"Destination Point Code", HFILL }
+		},
+		{ &hf_isup_thin_oam_message_name_code,
+			{ "Message Name Code","isup_thin.oam.message.name",
+			FT_UINT8, BASE_DEC,VALS(isup_thin_oam_message_name_code_vals), 0x0,
+			"Message Name", HFILL }
+		},
+		{ &hf_isup_thin_mtp_primitive_message_name_code,
+			{ "Message Name Code","isup_thin.mtp.message.name",
+			FT_UINT8, BASE_DEC,VALS(isup_thin_mtp_message_name_code_vals), 0x0,
+			"Message Name", HFILL }
+		},
+		{ &hf_isup_thin_isup_length,
+			{ "ISUP message length","isup_thin.isup.message.length",
+			FT_UINT16, BASE_DEC, NULL, 0x0,
+			"ISUP message length", HFILL }
+		},
+	};
+
+	module_t *isup_thin_module;
+/* Register the protocol name and description */
+	proto_isup_thin = proto_register_protocol("ISUP Thin Protocol","isup_thin", "isup_thin");
+
+/* Required function calls to register the header fields and subtrees used */
+	proto_register_field_array(proto_isup_thin, hf, array_length(hf));
+	proto_register_subtree_array(ett, array_length(ett));
+
+
+	isup_thin_module = prefs_register_protocol(proto_isup_thin, NULL);
+
+	prefs_register_uint_preference(isup_thin_module, "tcp.port",
+								   "ISUP Thin TCP Port",
+								   "Set TCP port for ISUP Thin messages",
+								   10,
+								   &ISUP_thinTCPPort);
+		
+  /*
+   * Register the dissector by name, so other dissectors can
+   * grab it by name rather than just referring to it directly
+   * (you can't refer to it directly from a plugin dissector
+   * on Windows without stuffing it into the Big Transfer Vector).
+   */
+  register_dissector("isup_thin", dissect_isup_thin, proto_isup_thin);
+
+}
+
+