MTP3 support, from Michael Tuexen.

svn path=/trunk/; revision=3444

1 files changed, 277 insertions, 0 deletions

diff --git a/packet-mtp3.c b/packet-mtp3.c
new file mode 100644
index 0000000000..8723695762
--- /dev/null
+++ b/packet-mtp3.c
@@ -0,0 +1,277 @@
+/* packet-mtp3.c
+ * Routines for Message Transfer Part Level 3 dissection
+ * Copyright 2001, Michael Tuexen <Michael.Tuexen@icn.siemens.de>
+ *
+ * $Id: packet-mtp3.c,v 1.1 2001/05/24 08:13:56 guy Exp $
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@unicom.net>
+ * Copyright 1998 Gerald Combs
+ *
+ * Copied from README.developer
+ * 
+ * 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>
+
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+
+#ifdef HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
+
+#include <glib.h>
+
+#include "packet.h"
+#include "prefs.h"
+
+/* Initialize the protocol and registered fields */
+static int proto_mtp3  = -1;
+static module_t *mtp3_module;
+
+static int hf_mtp3_service_indicator = -1;
+static int hf_mtp3_network_indicator = -1;
+static int hf_mtp3_spare = -1;
+static int hf_mtp3_opc = -1;
+static int hf_mtp3_dpc = -1;
+static int hf_mtp3_sls = -1;
+
+/* Initialize the subtree pointers */
+static gint ett_mtp3 = -1;
+static gint ett_mtp3_sio = -1;
+static gint ett_mtp3_label = -1;
+
+static dissector_table_t mtp3_sio_dissector_table;
+
+#define ITU_STANDARD   1
+#define ANSI_STANDARD  2
+
+static gint mtp3_standard = ITU_STANDARD;
+ 
+#define ITU_SIO_OFFSET 0
+#define ITU_SIO_LENGTH 1
+#define ITU_ROUTING_LABEL_OFFSET 1
+#define ITU_ROUTING_LABEL_LENGTH 4
+#define ITU_MTP_PAYLOAD_OFFSET 5
+
+#define SERVICE_INDICATOR_MASK 0x0F
+#define SPARE_MASK 0x30
+#define NETWORK_INDICATOR_MASK 0xC0
+#define DPC_MASK 0x00003FFF
+#define OPC_MASK 0x0FFFC000
+#define SLS_MASK 0xF0000000
+
+static const value_string service_indicator_code_vals[] = {
+	{ 0x0,	"Signalling network management message" },
+	{ 0x1,	"Signalling network testing and maintenance message" },
+	{ 0x2,	"Spare" },
+	{ 0x3,	"SCCP" },
+	{ 0x4,	"TUP" },
+	{ 0x5,	"ISUP" },
+	{ 0x6,	"DUP (call and circuit related messages)" },
+	{ 0x7,	"DUP (facility registration and cancellation message)" },
+	{ 0x8,	"MTP testing user part" },
+	{ 0x9,	"Spare" },
+	{ 0xa,	"Spare" },
+	{ 0xb,	"Spare" },
+	{ 0xc,	"Spare" },
+	{ 0xd,	"Spare" },
+	{ 0xe,	"Spare" },
+	{ 0xf,	"Spare" },
+	{ 0,	NULL }
+};
+
+static const value_string network_indicator_vals[] = {
+	{ 0x0,	"International network" },
+	{ 0x1,	"Spare (for international use only)" },
+	{ 0x2,	"National network" },
+	{ 0x3,	"Reserved for national use" },
+	{ 0,	NULL }
+};
+
+static void
+dissect_mtp3_sio(tvbuff_t *tvb, proto_tree *mtp3_tree)
+{
+  guint8 sio;
+  proto_item *sio_item;
+  proto_tree *sio_tree;
+  
+  sio_item = proto_tree_add_text(mtp3_tree, tvb, ITU_SIO_OFFSET, ITU_SIO_LENGTH, "Service information octet");    
+  sio_tree = proto_item_add_subtree(sio_item, ett_mtp3_sio);
+
+  sio = tvb_get_guint8(tvb, ITU_SIO_OFFSET);
+  proto_tree_add_uint(sio_tree, hf_mtp3_network_indicator,
+		      tvb, ITU_SIO_OFFSET, ITU_SIO_LENGTH,
+		      sio);
+  proto_tree_add_uint(sio_tree, hf_mtp3_spare,
+		      tvb, ITU_SIO_OFFSET, ITU_SIO_LENGTH,
+		      sio);
+  proto_tree_add_uint(sio_tree, hf_mtp3_service_indicator,
+		      tvb, ITU_SIO_OFFSET, ITU_SIO_LENGTH,
+		      sio);
+}
+
+static void
+dissect_mtp3_routing_label(tvbuff_t *tvb, proto_tree *mtp3_tree)
+{
+  guint32 label;
+  proto_item *label_item;
+  proto_tree *label_tree;
+  
+  label_item = proto_tree_add_text(mtp3_tree, tvb, ITU_ROUTING_LABEL_OFFSET, ITU_ROUTING_LABEL_LENGTH, "Routing label");    
+  label_tree = proto_item_add_subtree(label_item, ett_mtp3_label);
+
+  label = tvb_get_letohl(tvb, ITU_ROUTING_LABEL_OFFSET);
+  proto_tree_add_uint(label_tree, hf_mtp3_dpc,
+		      tvb, ITU_ROUTING_LABEL_OFFSET, ITU_ROUTING_LABEL_LENGTH,
+		      label);
+  proto_tree_add_uint(label_tree, hf_mtp3_opc,
+		      tvb, ITU_ROUTING_LABEL_OFFSET, ITU_ROUTING_LABEL_LENGTH,
+		      label);
+  proto_tree_add_uint(label_tree, hf_mtp3_sls,
+		      tvb, ITU_ROUTING_LABEL_OFFSET, ITU_ROUTING_LABEL_LENGTH,
+		      label);
+}
+
+static void
+dissect_mtp3_payload(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+  guint8 sio;
+  guint8 service_indicator;
+  tvbuff_t *payload_tvb;
+
+  sio = tvb_get_guint8(tvb, ITU_SIO_OFFSET);
+  service_indicator = sio & SERVICE_INDICATOR_MASK;
+  payload_tvb = tvb_new_subset(tvb, ITU_MTP_PAYLOAD_OFFSET, -1, -1);
+  if (!dissector_try_port(mtp3_sio_dissector_table, service_indicator, payload_tvb, pinfo, tree)) {
+    proto_tree_add_text(tree, payload_tvb, 0, tvb_length(payload_tvb),
+			"Payload (%u byte%s)",
+			tvb_length(payload_tvb), plurality(tvb_length(payload_tvb), "", "s")); 
+  }
+}
+
+/* Code to actually dissect the packets */
+static void
+dissect_mtp3(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+
+  /* Set up structures needed to add the protocol subtree and manage it */
+  proto_item *mtp3_item;
+  proto_tree *mtp3_tree;
+
+  /* Make entries in Protocol column and Info column on summary display */
+  if (check_col(pinfo->fd, COL_PROTOCOL)) 
+    col_set_str(pinfo->fd, COL_PROTOCOL, "MTP3");    
+  if (check_col(pinfo->fd, COL_INFO)) 
+    col_clear(pinfo->fd, COL_INFO);
+
+  /* In the interest of speed, if "tree" is NULL, don't do any work not
+     necessary to generate protocol tree items. */
+
+  if (tree) {
+
+    /* create display subtree for the protocol */
+    mtp3_item = proto_tree_add_item(tree, proto_mtp3, tvb, 0, tvb_length(tvb), FALSE);    
+    mtp3_tree = proto_item_add_subtree(mtp3_item, ett_mtp3);
+    
+    /* dissect the packet */
+    dissect_mtp3_sio(tvb, mtp3_tree);
+    dissect_mtp3_routing_label(tvb, mtp3_tree);
+    dissect_mtp3_payload(tvb, pinfo, tree);    
+  }
+}
+
+void
+proto_register_mtp3(void)
+{                 
+  
+  /* Setup list of header fields  See Section 1.6.1 for details*/
+  static hf_register_info hf[] = {
+    { &hf_mtp3_service_indicator,
+      { "Service indicator",
+	"mtp3.service_indicator",
+	FT_UINT8, BASE_HEX, VALS(service_indicator_code_vals), SERVICE_INDICATOR_MASK,          
+	"" }}, 
+    { &hf_mtp3_network_indicator,
+      { "Network indicator",
+	"mtp3.network_indicator",
+	FT_UINT8, BASE_HEX, VALS(network_indicator_vals), NETWORK_INDICATOR_MASK,          
+	"" }}, 
+    { &hf_mtp3_spare,
+      { "Spare",
+	"mtp3.spare",
+	FT_UINT8, BASE_HEX, NULL, SPARE_MASK,          
+	"" }}, 
+    { &hf_mtp3_opc,
+      { "OPC",
+	"mtp3.opc",
+	FT_UINT32, BASE_DEC, NULL, OPC_MASK,          
+	"" }}, 
+    { &hf_mtp3_dpc,
+      { "DPC",
+	"mtp3.dpc",
+	FT_UINT32, BASE_DEC, NULL, DPC_MASK,          
+	"" }}, 
+    { &hf_mtp3_sls,
+      { "SLS",
+	"mtp3.sls",
+	FT_UINT32, BASE_DEC, NULL, SLS_MASK,          
+	"" }}, 
+  };
+  
+  /* Setup protocol subtree array */
+  static gint *ett[] = {
+    &ett_mtp3,
+    &ett_mtp3_sio,
+    &ett_mtp3_label
+  };
+
+  static enum_val_t mtp3_options[] = {
+    {"ITU",  ITU_STANDARD},
+    /*    {"ANSI", ANSI_STANDARD}, */
+    {NULL, 0}
+  };
+  
+  /* Register the protocol name and description */
+  proto_mtp3 = proto_register_protocol("Message Transfer Part Level 3",
+				       "MTP Level 3", "MTP3");
+  
+  /* Required function calls to register the header fields and subtrees used */
+  proto_register_field_array(proto_mtp3, hf, array_length(hf));
+  proto_register_subtree_array(ett, array_length(ett));
+
+  /* Register the dissector */
+  register_dissector("mtp3", dissect_mtp3, proto_mtp3);
+
+  mtp3_sio_dissector_table = register_dissector_table("mtp3.service_indicator");
+  
+  mtp3_module = prefs_register_protocol(proto_mtp3, NULL);
+
+  prefs_register_enum_preference(mtp3_module, 
+				 "mtp3_standard",
+				 "MTP3 standard",
+				 "MTP3 standard", 
+				 &mtp3_standard,
+				 mtp3_options, FALSE);
+}