initial CTDB dissector

svn path=/trunk/; revision=21344

1 files changed, 277 insertions, 0 deletions

diff --git a/epan/dissectors/packet-ctdb.c b/epan/dissectors/packet-ctdb.c
new file mode 100644
index 0000000000..c131e6e73d
--- /dev/null
+++ b/epan/dissectors/packet-ctdb.c
@@ -0,0 +1,277 @@
+/* packet-ctdb.c
+ * Routines for CTDB (Cluster TDB) dissection
+ * Copyright 2007, Ronnie Sahlberg
+ *
+ * $Id$
+ *
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <glib.h>
+
+#include <epan/packet.h>
+#include <epan/prefs.h>
+#include <epan/value_string.h>
+#include <epan/conversation.h>
+#include <epan/emem.h>
+
+/* Initialize the protocol and registered fields */
+static int proto_ctdb = -1;
+static int hf_ctdb_length = -1;
+static int hf_ctdb_opcode = -1;
+static int hf_ctdb_dst = -1;
+static int hf_ctdb_src = -1;
+static int hf_ctdb_id = -1;
+static int hf_ctdb_flags_immediate = -1;
+static int hf_ctdb_dbid = -1;
+static int hf_ctdb_callid = -1;
+static int hf_ctdb_status = -1;
+static int hf_ctdb_datalen = -1;
+
+/* Initialize the subtree pointers */
+static gint ett_ctdb = -1;
+
+
+
+#define CTDB_REQ_CALL		0
+#define CTDB_REPLY_CALL		1
+#define CTDB_REPLY_REDIRECT	2
+#define CTDB_REQ_DMASTER	3
+#define CTDB_REPLY_DMASTER	4
+#define CTDB_REPLY_ERROR	5
+#define CTDB_REQ_MESSAGE	6
+static const value_string ctdb_opcodes[] = {
+	{CTDB_REQ_CALL,			"CTDB_REQ_CALL"},
+	{CTDB_REPLY_CALL,		"CTDB_REPLY_CALL"},
+	{CTDB_REPLY_REDIRECT,		"CTDB_REPLY_REDIRECT"},
+	{CTDB_REQ_DMASTER,		"CTDB_REQ_DMASTER"},
+	{CTDB_REPLY_DMASTER,		"CTDB_REPLY_DMASTER"},
+	{CTDB_REPLY_ERROR,		"CTDB_REPLY_ERROR"},
+	{CTDB_REQ_MESSAGE,		"CTDB_REQ_MESSAGE"},
+	{0,NULL}
+};
+
+
+static int
+dissect_ctdb_reply_call(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree)
+{
+	/* status */
+	proto_tree_add_item(tree, hf_ctdb_status, tvb, offset, 4, TRUE);
+	offset+=4;
+
+	/* datalen */
+	proto_tree_add_item(tree, hf_ctdb_datalen, tvb, offset, 4, TRUE);
+	offset+=4;
+
+	/* data */
+	
+	return offset;
+}
+
+static int
+dissect_ctdb_reply_dmaster(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree)
+{
+	/* datalen */
+	proto_tree_add_item(tree, hf_ctdb_datalen, tvb, offset, 4, TRUE);
+	offset+=4;
+
+	/* data */
+	
+	return offset;
+}
+
+static const true_false_string flags_immediate_tfs={
+	"DMASTER for the record must IMMEDIATELY be migrated to the caller",
+	"Dmaster migration is not required"
+};
+
+static int
+dissect_ctdb_req_call(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree)
+{
+	guint32 flags;
+
+	/* flags */
+	proto_tree_add_item(tree, hf_ctdb_flags_immediate, tvb, offset, 4, TRUE);
+	flags=tvb_get_letohl(tvb, offset);
+	if(flags&0x00000001){
+		if(check_col(pinfo->cinfo, COL_INFO)){
+			col_append_fstr(pinfo->cinfo, COL_INFO, " IMMEDIATE");
+		}
+	}	
+	offset+=4;
+
+	/* dbid */
+	proto_tree_add_item(tree, hf_ctdb_dbid, tvb, offset, 4, TRUE);
+	offset+=4;
+
+	/* callid */
+	proto_tree_add_item(tree, hf_ctdb_callid, tvb, offset, 4, TRUE);
+	offset+=4;
+
+	/* keylen */
+	/* calldatalen */
+	/* data */
+	return offset;
+}
+
+
+static gboolean
+dissect_ctdb(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree)
+{
+	proto_tree *tree=NULL;
+	proto_item *item=NULL;
+	int offset=0;
+	guint32 opcode, src, dst;
+
+	if(check_col(pinfo->cinfo, COL_PROTOCOL)){
+		col_set_str(pinfo->cinfo, COL_PROTOCOL, "CTDB");
+	}
+	if(check_col(pinfo->cinfo, COL_INFO)){
+		col_clear(pinfo->cinfo, COL_INFO);
+	}
+
+	if(parent_tree){
+		item=proto_tree_add_item(parent_tree, proto_ctdb, tvb, offset,
+			-1, TRUE);
+		tree=proto_item_add_subtree(item, ett_ctdb);
+	}
+
+	/* header*/
+	/* length */
+	proto_tree_add_item(tree, hf_ctdb_length, tvb, offset, 4, TRUE);
+	offset+=4;
+
+	/* opcode */
+	proto_tree_add_item(tree, hf_ctdb_opcode, tvb, offset, 4, TRUE);
+	opcode=tvb_get_letohl(tvb, offset);
+	offset+=4;
+
+	/* dst */
+	proto_tree_add_item(tree, hf_ctdb_dst, tvb, offset, 4, TRUE);
+	dst=tvb_get_letohl(tvb, offset);
+	offset+=4;
+
+	/* src */
+	proto_tree_add_item(tree, hf_ctdb_src, tvb, offset, 4, TRUE);
+	src=tvb_get_letohl(tvb, offset);
+	offset+=4;
+
+	/* id */
+	proto_tree_add_item(tree, hf_ctdb_id, tvb, offset, 4, TRUE);
+	offset+=4;
+
+	if(check_col(pinfo->cinfo, COL_INFO)){
+		col_append_fstr(pinfo->cinfo, COL_INFO, "%s %d->%d",
+			val_to_str(opcode, ctdb_opcodes, "Unknown:%d"),
+			src, dst);
+	}
+
+	switch(opcode){
+	case CTDB_REQ_CALL:
+		offset=dissect_ctdb_req_call(tvb, offset, pinfo, tree);
+		break;
+	case CTDB_REPLY_CALL:
+		offset=dissect_ctdb_reply_call(tvb, offset, pinfo, tree);
+		break;
+	case CTDB_REPLY_DMASTER:
+		offset=dissect_ctdb_reply_dmaster(tvb, offset, pinfo, tree);
+		break;
+	case CTDB_REPLY_REDIRECT:
+		break;
+	case CTDB_REQ_DMASTER:
+		break;
+	case CTDB_REPLY_ERROR:
+		break;
+	case CTDB_REQ_MESSAGE:
+		break;
+	};
+
+	return TRUE;
+}
+
+
+/*
+ * Register the protocol with Wireshark
+ */
+void
+proto_register_ctdb(void)
+{
+	static hf_register_info hf[] = {
+	{ &hf_ctdb_length, { 
+	  "Length", "ctdb.len", FT_UINT32, BASE_DEC, 
+	  NULL, 0x0, "Size of CTDB PDU", HFILL }},
+	{ &hf_ctdb_dst, { 
+	  "Destination", "ctdb.dst", FT_UINT32, BASE_DEC, 
+	  NULL, 0x0, "", HFILL }},
+	{ &hf_ctdb_src, { 
+	  "Source", "ctdb.src", FT_UINT32, BASE_DEC, 
+	  NULL, 0x0, "", HFILL }},
+	{ &hf_ctdb_id, { 
+	  "Id", "ctdb.id", FT_UINT32, BASE_DEC, 
+	  NULL, 0x0, "Transaction ID", HFILL }},
+	{ &hf_ctdb_opcode, { 
+	  "Opcode", "ctdb.opcode", FT_UINT32, BASE_DEC, 
+	  VALS(ctdb_opcodes), 0x0, "CTDB command opcode", HFILL }},
+	{ &hf_ctdb_flags_immediate, { 
+	  "Immediate", "ctdb.immediate", FT_BOOLEAN, 32, 
+	  TFS(&flags_immediate_tfs), 0x00000001, "Force migration of DMASTER?", HFILL }},
+	{ &hf_ctdb_dbid, { 
+	  "DB Id", "ctdb.dbid", FT_UINT32, BASE_HEX, 
+	  NULL, 0x0, "Database ID", HFILL }},
+	{ &hf_ctdb_callid, { 
+	  "Call Id", "ctdb.callid", FT_UINT32, BASE_DEC, 
+	  NULL, 0x0, "Call ID", HFILL }},
+	{ &hf_ctdb_status, { 
+	  "Status", "ctdb.status", FT_UINT32, BASE_DEC, 
+	  NULL, 0x0, "", HFILL }},
+	{ &hf_ctdb_datalen, { 
+	  "Data Length", "ctdb.datalen", FT_UINT32, BASE_DEC, 
+	  NULL, 0x0, "", HFILL }},
+	};
+
+	/* Setup protocol subtree array */
+	static gint *ett[] = {
+		&ett_ctdb,
+	};
+
+	/* Register the protocol name and description */
+	proto_ctdb = proto_register_protocol("Cluster TDB", "CTDB", "ctdb");
+
+	/* Required function calls to register the header fields and subtrees used */
+	proto_register_field_array(proto_ctdb, hf, array_length(hf));
+	proto_register_subtree_array(ett, array_length(ett));
+}
+
+
+void
+proto_reg_handoff_ctdb(void)
+{
+	dissector_handle_t ctdb_handle;
+
+	ctdb_handle = new_create_dissector_handle(dissect_ctdb, proto_ctdb);
+	dissector_add_handle("tcp.port", ctdb_handle);
+}