2009-02-11 00:40:21 +00:00
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/* packet-netdump.c
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* Routines for Netdump dissection
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* Copyright 2009, Neil Horman <nhorman@tuxdriver.com>
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdlib.h>
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#include <glib.h>
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#include <epan/packet.h>
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#include <epan/prefs.h>
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/* forward reference */
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void proto_reg_handoff_netdump(void);
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/* Initialize the protocol and registered fields */
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static int proto_netdump = -1;
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static int hf_netdump_magic_number = -1;
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static int hf_netdump_seq_nr = -1;
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static int hf_netdump_command = -1;
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static int hf_netdump_from = -1;
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static int hf_netdump_to = -1;
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static int hf_netdump_payload = -1;
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static int hf_netdump_code = -1;
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static int hf_netdump_info = -1;
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static int hf_netdump_version = -1;
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/* Global sample port pref */
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static guint gPORT_PREF = 0;
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/* Initialize the subtree pointers */
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static gint ett_netdump = -1;
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static const value_string command_names[] = {
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{ 0, "COMM_NONE" },
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{ 1, "COMM_SEND_MEM" },
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{ 2, "COMM_EXIT" },
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{ 3, "COMM_REBOOT" },
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{ 4, "COMM_HELLO" },
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{ 5, "COMM_GET_NR_PAGES" },
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{ 6, "COMM_GET_PAGE_SIZE" },
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{ 7, "COMM_START_NETDUMP_ACK" },
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{ 8, "COMM_GET_REGS" },
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{ 9, "COMM_SHOW_STATE" },
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{ 0, NULL }
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};
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static const value_string reply_code_names[] = {
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{ 0, "REPLY_NONE" },
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{ 1, "REPLY_ERROR" },
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{ 2, "REPLY_LOG" },
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{ 3, "REPLY_MEM" },
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{ 4, "REPLY_RESERVED" },
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{ 5, "REPLY_HELLO" },
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{ 6, "REPLY_NR_PAGES" },
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{ 7, "REPLY_PAGE_SIZE" },
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{ 8, "REPLY_START_NETDUMP" },
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{ 9, "REPLY_END_NETDUMP" },
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{ 10, "REPLY_REGS" },
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{ 11, "REPLY_MAGIC" },
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{ 12, "REPLY_SHOW_STATE" },
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{ 0, NULL }
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};
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/* Code to actually dissect the packets */
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static void
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dissect_netdump(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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/* Check that there's enough data */
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if (tvb_reported_length(tvb) == 0)
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return;
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2009-08-09 07:59:51 +00:00
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "Netdump");
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2009-02-11 00:40:21 +00:00
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/* Clear out stuff in the info column */
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2009-08-09 08:14:59 +00:00
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col_clear(pinfo->cinfo, COL_INFO);
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2009-02-11 00:40:21 +00:00
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if (tree) { /* we are being asked for details */
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proto_item *ti = NULL;
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proto_tree *netdump_tree = NULL;
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ti = proto_tree_add_item(tree, proto_netdump, tvb, 0, -1, FALSE);
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netdump_tree = proto_item_add_subtree(ti, ett_netdump);
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if (tvb_reported_length(tvb) == 24) {
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/* Its a request format packet */
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proto_tree_add_item(netdump_tree, hf_netdump_magic_number, tvb, 0, 8, FALSE);
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proto_tree_add_item(netdump_tree, hf_netdump_seq_nr, tvb, 8, 4, FALSE);
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proto_tree_add_item(netdump_tree, hf_netdump_command, tvb, 12, 4, FALSE);
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proto_tree_add_item(netdump_tree, hf_netdump_from, tvb, 16, 4, FALSE);
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proto_tree_add_item(netdump_tree, hf_netdump_to, tvb, 20, 4, FALSE);
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} else {
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/* Its a reply packet */
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proto_tree_add_item(netdump_tree, hf_netdump_version, tvb, 0, 1, FALSE);
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proto_tree_add_item(netdump_tree, hf_netdump_seq_nr, tvb, 1, 4, FALSE);
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proto_tree_add_item(netdump_tree, hf_netdump_code, tvb, 5, 4, FALSE);
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proto_tree_add_item(netdump_tree, hf_netdump_info, tvb, 9, 4, TRUE);
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proto_tree_add_item(netdump_tree, hf_netdump_payload, tvb, 13, -1, FALSE);
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}
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}
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}
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void proto_register_netdump(void)
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{
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module_t *netdump_module;
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/* Setup protocol subtree array */
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static gint *ett[] = {
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&ett_netdump
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};
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static hf_register_info hf[] = {
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{ &hf_netdump_magic_number,
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{ "Netdump Magic Number", "netdump.magic",
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FT_UINT64, BASE_HEX,
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NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_netdump_seq_nr,
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{"Netdump seq number", "netdump.seq_nr",
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FT_UINT32, BASE_HEX,
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NULL, 0x0,
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NULL, HFILL}
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},
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{ &hf_netdump_command,
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{"Netdump command", "netdump.command",
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FT_UINT32, BASE_DEC,
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VALS(command_names), 0x0,
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NULL, HFILL}
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},
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{ &hf_netdump_from,
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{"Netdump from val", "netdump.from",
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FT_UINT32, BASE_HEX,
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NULL, 0x0,
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NULL, HFILL}
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},
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{ &hf_netdump_to,
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{"Netdump to val", "netdump.to",
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FT_UINT32, BASE_HEX,
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NULL, 0x0,
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NULL, HFILL}
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},
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{ &hf_netdump_code,
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{"Netdump code", "netdump.code",
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FT_UINT32, BASE_DEC,
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VALS(reply_code_names), 0x0,
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NULL, HFILL}
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},
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{ &hf_netdump_info,
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{"Netdump info", "netdump.info",
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FT_UINT32, BASE_HEX,
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NULL, 0x0,
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NULL, HFILL}
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},
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{ &hf_netdump_payload,
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{"Netdump payload", "netdump.payload",
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From Kovarththanan Rajaratnam via bug 3548:
(1) Trailing/leading spaces are removed from 'name's/'blurb's
(2) Duplicate 'blurb's are replaced with NULL
(3) Empty ("") 'blurb's are replaced with NULL
(4) BASE_NONE, NULL, 0x0 are used for 'display', 'strings' and 'bitmask' fields
for FT_NONE, FT_BYTES, FT_IPv4, FT_IPv6, FT_ABSOLUTE_TIME, FT_RELATIVE_TIME,
FT_PROTOCOL, FT_STRING and FT_STRINGZ field types
(5) Only allow non-zero value for 'display' if 'bitmask' is non-zero
svn path=/trunk/; revision=28770
2009-06-18 21:30:42 +00:00
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FT_BYTES, BASE_NONE,
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2009-02-11 00:40:21 +00:00
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NULL, 0x0,
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NULL, HFILL}
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},
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{ &hf_netdump_version,
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{"Netdump version", "netdump.version",
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FT_UINT8, BASE_HEX,
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NULL, 0x0,
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NULL, HFILL}
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}
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};
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proto_netdump = proto_register_protocol (
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"Netdump Protocol", /* name */
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"Netdump", /* short name */
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"netdump" /* abbrev */
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);
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proto_register_field_array(proto_netdump, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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netdump_module = prefs_register_protocol(proto_netdump,
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proto_reg_handoff_netdump);
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/* Register a sample port preference */
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prefs_register_uint_preference(netdump_module, "udp.port",
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"Netdump UDP port",
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"port if other than the default",
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10, &gPORT_PREF);
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}
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void proto_reg_handoff_netdump(void)
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{
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static gboolean initalized = FALSE;
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static dissector_handle_t netdump_handle;
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static int CurrentPort;
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if (!initalized) {
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netdump_handle = create_dissector_handle(dissect_netdump,
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proto_netdump);
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dissector_add_handle("udp.port", netdump_handle); /* For Decode As */
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initalized = TRUE;
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} else {
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if (CurrentPort != 0)
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2010-12-20 05:35:29 +00:00
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dissector_delete_uint("udp.port", CurrentPort, netdump_handle);
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2009-02-11 00:40:21 +00:00
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}
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CurrentPort = gPORT_PREF;
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if (CurrentPort != 0)
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2010-12-20 05:35:29 +00:00
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dissector_add_uint("udp.port", CurrentPort, netdump_handle);
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2009-02-11 00:40:21 +00:00
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}
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