2 * Routines for Netdump dissection
3 * Copyright 2009, Neil Horman <nhorman@tuxdriver.com>
7 * Wireshark - Network traffic analyzer
8 * By Gerald Combs <gerald@wireshark.org>
9 * Copyright 1998 Gerald Combs
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version 2
14 * of the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
37 #include <epan/packet.h>
38 #include <epan/prefs.h>
40 /* forward reference */
41 void proto_reg_handoff_netdump(void);
43 /* Initialize the protocol and registered fields */
44 static int proto_netdump = -1;
45 static int hf_netdump_magic_number = -1;
46 static int hf_netdump_seq_nr = -1;
47 static int hf_netdump_command = -1;
48 static int hf_netdump_from = -1;
49 static int hf_netdump_to = -1;
50 static int hf_netdump_payload = -1;
51 static int hf_netdump_code = -1;
52 static int hf_netdump_info = -1;
53 static int hf_netdump_version = -1;
55 /* Global sample port pref */
56 static guint gPORT_PREF = 0;
58 /* Initialize the subtree pointers */
59 static gint ett_netdump = -1;
61 static const value_string command_names[] = {
63 { 1, "COMM_SEND_MEM" },
67 { 5, "COMM_GET_NR_PAGES" },
68 { 6, "COMM_GET_PAGE_SIZE" },
69 { 7, "COMM_START_NETDUMP_ACK" },
70 { 8, "COMM_GET_REGS" },
71 { 9, "COMM_SHOW_STATE" },
75 static const value_string reply_code_names[] = {
80 { 4, "REPLY_RESERVED" },
82 { 6, "REPLY_NR_PAGES" },
83 { 7, "REPLY_PAGE_SIZE" },
84 { 8, "REPLY_START_NETDUMP" },
85 { 9, "REPLY_END_NETDUMP" },
87 { 11, "REPLY_MAGIC" },
88 { 12, "REPLY_SHOW_STATE" },
93 /* Code to actually dissect the packets */
95 dissect_netdump(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
98 /* Check that there's enough data */
99 if (tvb_reported_length(tvb) == 0)
102 col_set_str(pinfo->cinfo, COL_PROTOCOL, "Netdump");
103 /* Clear out stuff in the info column */
104 if (check_col(pinfo->cinfo,COL_INFO)) {
105 col_clear(pinfo->cinfo,COL_INFO);
108 if (tree) { /* we are being asked for details */
109 proto_item *ti = NULL;
110 proto_tree *netdump_tree = NULL;
111 ti = proto_tree_add_item(tree, proto_netdump, tvb, 0, -1, FALSE);
112 netdump_tree = proto_item_add_subtree(ti, ett_netdump);
113 if (tvb_reported_length(tvb) == 24) {
114 /* Its a request format packet */
115 proto_tree_add_item(netdump_tree, hf_netdump_magic_number, tvb, 0, 8, FALSE);
116 proto_tree_add_item(netdump_tree, hf_netdump_seq_nr, tvb, 8, 4, FALSE);
117 proto_tree_add_item(netdump_tree, hf_netdump_command, tvb, 12, 4, FALSE);
118 proto_tree_add_item(netdump_tree, hf_netdump_from, tvb, 16, 4, FALSE);
119 proto_tree_add_item(netdump_tree, hf_netdump_to, tvb, 20, 4, FALSE);
121 /* Its a reply packet */
122 proto_tree_add_item(netdump_tree, hf_netdump_version, tvb, 0, 1, FALSE);
123 proto_tree_add_item(netdump_tree, hf_netdump_seq_nr, tvb, 1, 4, FALSE);
124 proto_tree_add_item(netdump_tree, hf_netdump_code, tvb, 5, 4, FALSE);
125 proto_tree_add_item(netdump_tree, hf_netdump_info, tvb, 9, 4, TRUE);
126 proto_tree_add_item(netdump_tree, hf_netdump_payload, tvb, 13, -1, FALSE);
131 void proto_register_netdump(void)
133 module_t *netdump_module;
135 /* Setup protocol subtree array */
136 static gint *ett[] = {
140 static hf_register_info hf[] = {
141 { &hf_netdump_magic_number,
142 { "Netdump Magic Number", "netdump.magic",
147 { &hf_netdump_seq_nr,
148 {"Netdump seq number", "netdump.seq_nr",
153 { &hf_netdump_command,
154 {"Netdump command", "netdump.command",
156 VALS(command_names), 0x0,
160 {"Netdump from val", "netdump.from",
166 {"Netdump to val", "netdump.to",
172 {"Netdump code", "netdump.code",
174 VALS(reply_code_names), 0x0,
178 {"Netdump info", "netdump.info",
183 { &hf_netdump_payload,
184 {"Netdump payload", "netdump.payload",
189 { &hf_netdump_version,
190 {"Netdump version", "netdump.version",
197 proto_netdump = proto_register_protocol (
198 "Netdump Protocol", /* name */
199 "Netdump", /* short name */
200 "netdump" /* abbrev */
202 proto_register_field_array(proto_netdump, hf, array_length(hf));
203 proto_register_subtree_array(ett, array_length(ett));
205 netdump_module = prefs_register_protocol(proto_netdump,
206 proto_reg_handoff_netdump);
208 /* Register a sample port preference */
209 prefs_register_uint_preference(netdump_module, "udp.port",
211 "port if other than the default",
215 void proto_reg_handoff_netdump(void)
217 static gboolean initalized = FALSE;
218 static dissector_handle_t netdump_handle;
219 static int CurrentPort;
222 netdump_handle = create_dissector_handle(dissect_netdump,
225 dissector_add_handle("udp.port", netdump_handle); /* For Decode As */
228 if (CurrentPort != 0)
229 dissector_delete("udp.port", CurrentPort, netdump_handle);
232 CurrentPort = gPORT_PREF;
234 if (CurrentPort != 0)
235 dissector_add("udp.port", CurrentPort, netdump_handle);