2 * Routines for DDTP (Dynamic DNS Tools Protocol) packet disassembly
3 * see http://ddt.sourceforge.net/
4 * Olivier Abad <oabad@noos.fr>
6 * $Id: packet-ddtp.c,v 1.24 2003/01/19 21:43:18 guy Exp $
8 * Ethereal - Network traffic analyzer
9 * By Gerald Combs <gerald@ethereal.com>
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
32 #include <epan/packet.h>
33 #include "packet-ddtp.h"
35 static int proto_ddtp = -1;
36 static int hf_ddtp_version = -1;
37 static int hf_ddtp_encrypt = -1;
38 static int hf_ddtp_hostid = -1;
39 static int hf_ddtp_msgtype = -1;
40 static int hf_ddtp_opcode = -1;
41 static int hf_ddtp_ipaddr = -1;
42 static int hf_ddtp_status = -1;
44 static int ett_ddtp = -1;
46 #define UDP_PORT_DDTP 1052
49 * XXX - is 0 an invalid value? If so, should we remove it from this
50 * list, so that putative DDNS packets with a version number of 0 are
53 static const value_string vals_ddtp_version[] = {
54 { DDTP_VERSION_ERROR, "Protocol Error" },
55 { DDTP_VERSION_4, "4" },
56 { DDTP_VERSION_5, "5" },
60 static const value_string vals_ddtp_encrypt[] = {
61 { DDTP_ENCRYPT_ERROR, "Encryption Error" },
62 { DDTP_ENCRYPT_PLAINTEXT, "Plain text" },
63 { DDTP_ENCRYPT_BLOWFISH, "Blowfish" },
67 static const value_string vals_ddtp_msgtype[] = {
68 { DDTP_MESSAGE_ERROR, "Message Error" },
69 { DDTP_UPDATE_QUERY, "Update Query" },
70 { DDTP_UPDATE_REPLY, "Update Reply" },
71 { DDTP_ALIVE_QUERY, "Alive Query" },
72 { DDTP_ALIVE_REPLY, "Alive Reply" },
76 static const value_string vals_ddtp_opcode[] = {
77 { DDTP_MARK_ONLINE, "Mark online" },
78 { DDTP_MARK_OFFLINE, "Mark offline" },
82 static const value_string vals_ddtp_status[] = {
83 { DDTP_UPDATE_SUCCEEDED, "Update succeeded" },
84 { DDTP_UPDATE_FAILED, "Update failed" },
85 { DDTP_INVALID_PASSWORD, "Invalid password" },
86 { DDTP_INVALID_ACCOUNT, "Invalid account" },
87 { DDTP_INVALID_OPCODE, "Invalid opcode" },
92 dissect_ddtp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
94 proto_tree *ddtp_tree = NULL;
98 * If we don't recognize the version number, don't dissect this.
100 if (tvb_bytes_exist(tvb, 0, 4)) {
101 if (match_strval(tvb_get_ntohl(tvb, 0), vals_ddtp_version) == NULL)
105 if (check_col(pinfo->cinfo, COL_PROTOCOL)) {
106 /* Indicate what kind of message this is. */
107 col_set_str (pinfo->cinfo, COL_PROTOCOL, "DDTP");
109 if (check_col(pinfo->cinfo, COL_INFO)) {
110 /* In case we throw an exception below. */
111 col_clear (pinfo->cinfo, COL_INFO);
114 ti = proto_tree_add_item(tree, proto_ddtp, tvb, 0, -1, FALSE);
115 ddtp_tree = proto_item_add_subtree(ti, ett_ddtp);
117 proto_tree_add_item(ddtp_tree, hf_ddtp_version, tvb, 0, 4, FALSE);
118 proto_tree_add_item(ddtp_tree, hf_ddtp_encrypt, tvb, 4, 4, FALSE);
119 proto_tree_add_item(ddtp_tree, hf_ddtp_hostid, tvb, 8, 4, FALSE);
121 if (tvb_get_ntohl(tvb, 4) == DDTP_ENCRYPT_PLAINTEXT) {
123 proto_tree_add_item(ddtp_tree, hf_ddtp_msgtype, tvb, 12, 4, FALSE);
124 switch (tvb_get_ntohl(tvb, 12)) {
125 case DDTP_MESSAGE_ERROR :
126 if (check_col(pinfo->cinfo, COL_INFO))
127 col_set_str (pinfo->cinfo, COL_INFO, "Message Error");
129 case DDTP_UPDATE_QUERY :
130 if (check_col(pinfo->cinfo, COL_INFO))
131 col_set_str (pinfo->cinfo, COL_INFO, "Update Query");
133 proto_tree_add_item(ddtp_tree, hf_ddtp_opcode, tvb, 16, 4,
135 proto_tree_add_item(ddtp_tree, hf_ddtp_ipaddr, tvb, 20, 4,
139 case DDTP_UPDATE_REPLY :
140 if (check_col(pinfo->cinfo, COL_INFO))
141 col_set_str (pinfo->cinfo, COL_INFO, "Update Reply");
143 proto_tree_add_item(ddtp_tree, hf_ddtp_status, tvb, 16, 4,
147 case DDTP_ALIVE_QUERY :
148 if (check_col(pinfo->cinfo, COL_INFO))
149 col_set_str (pinfo->cinfo, COL_INFO, "Alive Query");
151 proto_tree_add_text(ddtp_tree, tvb, 16, 4, "Dummy : %u",
152 tvb_get_ntohl(tvb, 16));
155 case DDTP_ALIVE_REPLY :
156 if (check_col(pinfo->cinfo, COL_INFO))
157 col_set_str (pinfo->cinfo, COL_INFO, "Alive Reply");
159 proto_tree_add_text(ddtp_tree, tvb, 16, 4, "Dummy : %u",
160 tvb_get_ntohl(tvb, 16));
164 if (check_col(pinfo->cinfo, COL_INFO))
165 col_set_str (pinfo->cinfo, COL_INFO, "Unknown type");
167 proto_tree_add_text(ddtp_tree, tvb, 12, 4, "Unknown type : %u",
168 tvb_get_ntohl(tvb, 12));
172 if (check_col(pinfo->cinfo, COL_INFO))
173 col_set_str (pinfo->cinfo, COL_INFO, "Encrypted payload");
175 return tvb_length(tvb);
179 proto_register_ddtp(void)
181 static hf_register_info hf_ddtp[] = {
183 { "Version", "ddtp.version", FT_UINT32, BASE_DEC, VALS(vals_ddtp_version), 0x0,
186 { "Encryption", "ddtp.encrypt", FT_UINT32, BASE_DEC, VALS(vals_ddtp_encrypt), 0x0,
187 "Encryption type", HFILL }},
189 { "Hostid", "ddtp.hostid", FT_UINT32, BASE_DEC, NULL, 0x0,
192 { "Message type", "ddtp.msgtype", FT_UINT32, BASE_DEC, VALS(vals_ddtp_msgtype), 0x0,
193 "Message Type", HFILL }},
195 { "Opcode", "ddtp.opcode", FT_UINT32, BASE_DEC, VALS(vals_ddtp_opcode), 0x0,
196 "Update query opcode", HFILL }},
198 { "IP address", "ddtp.ipaddr", FT_IPv4, BASE_NONE, NULL, 0x0,
199 "IP address", HFILL }},
201 { "Status", "ddtp.status", FT_UINT32, BASE_DEC, VALS(vals_ddtp_status), 0x0,
202 "Update reply status", HFILL }}
205 static gint *ett[] = { &ett_ddtp };
207 proto_ddtp = proto_register_protocol("Dynamic DNS Tools Protocol",
209 proto_register_field_array(proto_ddtp, hf_ddtp, array_length(hf_ddtp));
210 proto_register_subtree_array(ett, array_length(ett));
214 proto_reg_handoff_ddtp(void)
216 dissector_handle_t ddtp_handle;
218 ddtp_handle = new_create_dissector_handle(dissect_ddtp, proto_ddtp);
219 dissector_add("udp.port", UDP_PORT_DDTP, ddtp_handle);