forked from osmocom/wireshark
221 lines
6.8 KiB
C
221 lines
6.8 KiB
C
/* packet-ddtp.c
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* Routines for DDTP (Dynamic DNS Tools Protocol) packet disassembly
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* see http://ddt.sourceforge.net/
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* Olivier Abad <oabad@noos.fr>
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*
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* $Id: packet-ddtp.c,v 1.24 2003/01/19 21:43:18 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 2000
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 <glib.h>
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#include <epan/packet.h>
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#include "packet-ddtp.h"
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static int proto_ddtp = -1;
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static int hf_ddtp_version = -1;
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static int hf_ddtp_encrypt = -1;
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static int hf_ddtp_hostid = -1;
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static int hf_ddtp_msgtype = -1;
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static int hf_ddtp_opcode = -1;
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static int hf_ddtp_ipaddr = -1;
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static int hf_ddtp_status = -1;
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static int ett_ddtp = -1;
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#define UDP_PORT_DDTP 1052
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/*
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* XXX - is 0 an invalid value? If so, should we remove it from this
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* list, so that putative DDNS packets with a version number of 0 are
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* rejected?
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*/
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static const value_string vals_ddtp_version[] = {
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{ DDTP_VERSION_ERROR, "Protocol Error" },
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{ DDTP_VERSION_4, "4" },
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{ DDTP_VERSION_5, "5" },
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{ 0, NULL}
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};
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static const value_string vals_ddtp_encrypt[] = {
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{ DDTP_ENCRYPT_ERROR, "Encryption Error" },
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{ DDTP_ENCRYPT_PLAINTEXT, "Plain text" },
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{ DDTP_ENCRYPT_BLOWFISH, "Blowfish" },
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{ 0, NULL}
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};
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static const value_string vals_ddtp_msgtype[] = {
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{ DDTP_MESSAGE_ERROR, "Message Error" },
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{ DDTP_UPDATE_QUERY, "Update Query" },
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{ DDTP_UPDATE_REPLY, "Update Reply" },
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{ DDTP_ALIVE_QUERY, "Alive Query" },
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{ DDTP_ALIVE_REPLY, "Alive Reply" },
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{ 0, NULL}
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};
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static const value_string vals_ddtp_opcode[] = {
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{ DDTP_MARK_ONLINE, "Mark online" },
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{ DDTP_MARK_OFFLINE, "Mark offline" },
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{ 0, NULL}
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};
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static const value_string vals_ddtp_status[] = {
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{ DDTP_UPDATE_SUCCEEDED, "Update succeeded" },
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{ DDTP_UPDATE_FAILED, "Update failed" },
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{ DDTP_INVALID_PASSWORD, "Invalid password" },
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{ DDTP_INVALID_ACCOUNT, "Invalid account" },
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{ DDTP_INVALID_OPCODE, "Invalid opcode" },
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{ 0, NULL}
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};
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static int
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dissect_ddtp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_tree *ddtp_tree = NULL;
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proto_item *ti;
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/*
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* If we don't recognize the version number, don't dissect this.
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*/
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if (tvb_bytes_exist(tvb, 0, 4)) {
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if (match_strval(tvb_get_ntohl(tvb, 0), vals_ddtp_version) == NULL)
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return 0;
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}
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if (check_col(pinfo->cinfo, COL_PROTOCOL)) {
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/* Indicate what kind of message this is. */
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col_set_str (pinfo->cinfo, COL_PROTOCOL, "DDTP");
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}
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if (check_col(pinfo->cinfo, COL_INFO)) {
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/* In case we throw an exception below. */
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col_clear (pinfo->cinfo, COL_INFO);
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}
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if (tree) {
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ti = proto_tree_add_item(tree, proto_ddtp, tvb, 0, -1, FALSE);
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ddtp_tree = proto_item_add_subtree(ti, ett_ddtp);
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proto_tree_add_item(ddtp_tree, hf_ddtp_version, tvb, 0, 4, FALSE);
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proto_tree_add_item(ddtp_tree, hf_ddtp_encrypt, tvb, 4, 4, FALSE);
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proto_tree_add_item(ddtp_tree, hf_ddtp_hostid, tvb, 8, 4, FALSE);
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}
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if (tvb_get_ntohl(tvb, 4) == DDTP_ENCRYPT_PLAINTEXT) {
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if (tree)
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proto_tree_add_item(ddtp_tree, hf_ddtp_msgtype, tvb, 12, 4, FALSE);
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switch (tvb_get_ntohl(tvb, 12)) {
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case DDTP_MESSAGE_ERROR :
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if (check_col(pinfo->cinfo, COL_INFO))
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col_set_str (pinfo->cinfo, COL_INFO, "Message Error");
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break;
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case DDTP_UPDATE_QUERY :
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if (check_col(pinfo->cinfo, COL_INFO))
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col_set_str (pinfo->cinfo, COL_INFO, "Update Query");
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if (tree) {
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proto_tree_add_item(ddtp_tree, hf_ddtp_opcode, tvb, 16, 4,
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FALSE);
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proto_tree_add_item(ddtp_tree, hf_ddtp_ipaddr, tvb, 20, 4,
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FALSE);
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}
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break;
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case DDTP_UPDATE_REPLY :
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if (check_col(pinfo->cinfo, COL_INFO))
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col_set_str (pinfo->cinfo, COL_INFO, "Update Reply");
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if (tree) {
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proto_tree_add_item(ddtp_tree, hf_ddtp_status, tvb, 16, 4,
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FALSE);
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}
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break;
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case DDTP_ALIVE_QUERY :
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if (check_col(pinfo->cinfo, COL_INFO))
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col_set_str (pinfo->cinfo, COL_INFO, "Alive Query");
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if (tree) {
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proto_tree_add_text(ddtp_tree, tvb, 16, 4, "Dummy : %u",
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tvb_get_ntohl(tvb, 16));
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}
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break;
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case DDTP_ALIVE_REPLY :
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if (check_col(pinfo->cinfo, COL_INFO))
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col_set_str (pinfo->cinfo, COL_INFO, "Alive Reply");
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if (tree) {
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proto_tree_add_text(ddtp_tree, tvb, 16, 4, "Dummy : %u",
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tvb_get_ntohl(tvb, 16));
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}
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break;
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default :
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if (check_col(pinfo->cinfo, COL_INFO))
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col_set_str (pinfo->cinfo, COL_INFO, "Unknown type");
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if (tree) {
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proto_tree_add_text(ddtp_tree, tvb, 12, 4, "Unknown type : %u",
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tvb_get_ntohl(tvb, 12));
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}
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}
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} else {
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if (check_col(pinfo->cinfo, COL_INFO))
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col_set_str (pinfo->cinfo, COL_INFO, "Encrypted payload");
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}
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return tvb_length(tvb);
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}
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void
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proto_register_ddtp(void)
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{
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static hf_register_info hf_ddtp[] = {
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{ &hf_ddtp_version,
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{ "Version", "ddtp.version", FT_UINT32, BASE_DEC, VALS(vals_ddtp_version), 0x0,
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"Version", HFILL }},
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{ &hf_ddtp_encrypt,
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{ "Encryption", "ddtp.encrypt", FT_UINT32, BASE_DEC, VALS(vals_ddtp_encrypt), 0x0,
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"Encryption type", HFILL }},
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{ &hf_ddtp_hostid,
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{ "Hostid", "ddtp.hostid", FT_UINT32, BASE_DEC, NULL, 0x0,
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"Host ID", HFILL }},
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{ &hf_ddtp_msgtype,
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{ "Message type", "ddtp.msgtype", FT_UINT32, BASE_DEC, VALS(vals_ddtp_msgtype), 0x0,
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"Message Type", HFILL }},
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{ &hf_ddtp_opcode,
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{ "Opcode", "ddtp.opcode", FT_UINT32, BASE_DEC, VALS(vals_ddtp_opcode), 0x0,
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"Update query opcode", HFILL }},
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{ &hf_ddtp_ipaddr,
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{ "IP address", "ddtp.ipaddr", FT_IPv4, BASE_NONE, NULL, 0x0,
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"IP address", HFILL }},
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{ &hf_ddtp_status,
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{ "Status", "ddtp.status", FT_UINT32, BASE_DEC, VALS(vals_ddtp_status), 0x0,
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"Update reply status", HFILL }}
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};
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static gint *ett[] = { &ett_ddtp };
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proto_ddtp = proto_register_protocol("Dynamic DNS Tools Protocol",
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"DDTP", "ddtp");
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proto_register_field_array(proto_ddtp, hf_ddtp, array_length(hf_ddtp));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void
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proto_reg_handoff_ddtp(void)
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{
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dissector_handle_t ddtp_handle;
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ddtp_handle = new_create_dissector_handle(dissect_ddtp, proto_ddtp);
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dissector_add("udp.port", UDP_PORT_DDTP, ddtp_handle);
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}
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