forked from osmocom/wireshark
![Dario Lombardo](/assets/img/avatar_default.png)
Change-Id: I92c94448e6641716d03158a5f332c8b53709423a Reviewed-on: https://code.wireshark.org/review/25756 Petri-Dish: Dario Lombardo <lomato@gmail.com> Reviewed-by: Anders Broman <a.broman58@gmail.com>
229 lines
7.4 KiB
C
229 lines
7.4 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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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 2000
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/expert.h>
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#define DDTP_VERSION_ERROR 0
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#define DDTP_VERSION_4 1
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#define DDTP_VERSION_5 2
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#define DDTP_ENCRYPT_ERROR 0
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#define DDTP_ENCRYPT_PLAINTEXT 1
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#define DDTP_ENCRYPT_BLOWFISH 2
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#define DDTP_MESSAGE_ERROR 0
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#define DDTP_UPDATE_QUERY 1
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#define DDTP_UPDATE_REPLY 2
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#define DDTP_ALIVE_QUERY 3
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#define DDTP_ALIVE_REPLY 4
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#define DDTP_MARK_ONLINE 0
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#define DDTP_MARK_OFFLINE 1
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#define DDTP_UPDATE_SUCCEEDED 0
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#define DDTP_UPDATE_FAILED 1
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#define DDTP_INVALID_PASSWORD 2
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#define DDTP_INVALID_ACCOUNT 3
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#define DDTP_INVALID_OPCODE 4
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void proto_register_ddtp (void);
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void proto_reg_handoff_ddtp (void);
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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 hf_ddtp_alive = -1;
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static int ett_ddtp = -1;
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static expert_field ei_ddtp_msgtype = EI_INIT;
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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, void *data _U_)
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{
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proto_tree *ddtp_tree;
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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_reported_length(tvb) < 4)
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return 0;
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if (try_val_to_str(tvb_get_ntohl(tvb, 0), vals_ddtp_version) == NULL)
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return 0;
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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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/* In case we throw an exception below. */
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col_clear (pinfo->cinfo, COL_INFO);
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ti = proto_tree_add_item(tree, proto_ddtp, tvb, 0, -1, ENC_NA);
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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, ENC_BIG_ENDIAN);
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proto_tree_add_item(ddtp_tree, hf_ddtp_encrypt, tvb, 4, 4, ENC_BIG_ENDIAN);
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proto_tree_add_item(ddtp_tree, hf_ddtp_hostid, tvb, 8, 4, ENC_BIG_ENDIAN);
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if (tvb_get_ntohl(tvb, 4) == DDTP_ENCRYPT_PLAINTEXT) {
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ti = proto_tree_add_item(ddtp_tree, hf_ddtp_msgtype, tvb, 12, 4, ENC_BIG_ENDIAN);
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switch (tvb_get_ntohl(tvb, 12)) {
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case DDTP_MESSAGE_ERROR :
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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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col_set_str(pinfo->cinfo, COL_INFO, "Update Query");
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proto_tree_add_item(ddtp_tree, hf_ddtp_opcode, tvb, 16, 4, ENC_BIG_ENDIAN);
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proto_tree_add_item(ddtp_tree, hf_ddtp_ipaddr, tvb, 20, 4, ENC_BIG_ENDIAN);
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break;
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case DDTP_UPDATE_REPLY :
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col_set_str(pinfo->cinfo, COL_INFO, "Update Reply");
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proto_tree_add_item(ddtp_tree, hf_ddtp_status, tvb, 16, 4, ENC_BIG_ENDIAN);
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break;
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case DDTP_ALIVE_QUERY :
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col_set_str(pinfo->cinfo, COL_INFO, "Alive Query");
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proto_tree_add_item(ddtp_tree, hf_ddtp_alive, tvb, 16, 4, ENC_BIG_ENDIAN);
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break;
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case DDTP_ALIVE_REPLY :
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col_set_str(pinfo->cinfo, COL_INFO, "Alive Reply");
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proto_tree_add_item(ddtp_tree, hf_ddtp_alive, tvb, 16, 4, ENC_BIG_ENDIAN);
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break;
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default :
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col_set_str(pinfo->cinfo, COL_INFO, "Unknown type");
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expert_add_info(pinfo, ti, &ei_ddtp_msgtype);
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}
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} else {
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col_set_str(pinfo->cinfo, COL_INFO, "Encrypted payload");
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}
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return tvb_reported_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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NULL, 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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NULL, 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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NULL, 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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{ &hf_ddtp_alive,
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{ "Dummy", "ddtp.alive", FT_UINT32, BASE_DEC, NULL, 0x0,
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NULL, HFILL }},
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};
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static gint *ett[] = { &ett_ddtp };
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static ei_register_info ei[] = {
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{ &ei_ddtp_msgtype, { "ddtp.msgtype.unknown", PI_PROTOCOL, PI_WARN, "Unknown type", EXPFILL }},
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};
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expert_module_t* expert_ddtp;
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proto_ddtp = proto_register_protocol("Dynamic DNS Tools Protocol", "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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expert_ddtp = expert_register_protocol(proto_ddtp);
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expert_register_field_array(expert_ddtp, ei, array_length(ei));
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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 = create_dissector_handle(dissect_ddtp, proto_ddtp);
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dissector_add_uint_with_preference("udp.port", UDP_PORT_DDTP, ddtp_handle);
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}
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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