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wireshark/epan/dissectors/packet-ddtp.c
Evan Huus 37600a157b Rename value string (and similar) functions to use a consistent pattern. This 
was done using textual search+replace, not anything syntax-aware, so presumably
it got most comments as well (except where there were typos).

Use a consistent coding style, and make proper use of the WS_DLL_* defines.

Group the functions appropriately in the header.

I ended up getting rid of most of the explanatory comments since many of them
duplicated what was in the value_string.c file (and were out of sync with the
recent updates I made to those in r48633). Presumably most of the comments
should be in the .h file not the .c file, but there's enough churn ahead that
it's not worth fixing yet.

Part of https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=8467

svn path=/trunk/; revision=48634
2013-03-29 00:26:23 +00:00

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6.5 KiB
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/* packet-ddtp.c
* Routines for DDTP (Dynamic DNS Tools Protocol) packet disassembly
* see http://ddt.sourceforge.net/
* Olivier Abad <oabad@noos.fr>
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 2000
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <glib.h>
#include <epan/packet.h>
#include "packet-ddtp.h"
void proto_register_ddtp (void);
void proto_reg_handoff_ddtp (void);
static int proto_ddtp = -1;
static int hf_ddtp_version = -1;
static int hf_ddtp_encrypt = -1;
static int hf_ddtp_hostid = -1;
static int hf_ddtp_msgtype = -1;
static int hf_ddtp_opcode = -1;
static int hf_ddtp_ipaddr = -1;
static int hf_ddtp_status = -1;
static int ett_ddtp = -1;
#define UDP_PORT_DDTP 1052
/*
* XXX - is 0 an invalid value? If so, should we remove it from this
* list, so that putative DDNS packets with a version number of 0 are
* rejected?
*/
static const value_string vals_ddtp_version[] = {
{ DDTP_VERSION_ERROR, "Protocol Error" },
{ DDTP_VERSION_4, "4" },
{ DDTP_VERSION_5, "5" },
{ 0, NULL}
};
static const value_string vals_ddtp_encrypt[] = {
{ DDTP_ENCRYPT_ERROR, "Encryption Error" },
{ DDTP_ENCRYPT_PLAINTEXT, "Plain text" },
{ DDTP_ENCRYPT_BLOWFISH, "Blowfish" },
{ 0, NULL}
};
static const value_string vals_ddtp_msgtype[] = {
{ DDTP_MESSAGE_ERROR, "Message Error" },
{ DDTP_UPDATE_QUERY, "Update Query" },
{ DDTP_UPDATE_REPLY, "Update Reply" },
{ DDTP_ALIVE_QUERY, "Alive Query" },
{ DDTP_ALIVE_REPLY, "Alive Reply" },
{ 0, NULL}
};
static const value_string vals_ddtp_opcode[] = {
{ DDTP_MARK_ONLINE, "Mark online" },
{ DDTP_MARK_OFFLINE, "Mark offline" },
{ 0, NULL}
};
static const value_string vals_ddtp_status[] = {
{ DDTP_UPDATE_SUCCEEDED, "Update succeeded" },
{ DDTP_UPDATE_FAILED, "Update failed" },
{ DDTP_INVALID_PASSWORD, "Invalid password" },
{ DDTP_INVALID_ACCOUNT, "Invalid account" },
{ DDTP_INVALID_OPCODE, "Invalid opcode" },
{ 0, NULL}
};
static int
dissect_ddtp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
proto_tree *ddtp_tree = NULL;
proto_item *ti;
/*
* If we don't recognize the version number, don't dissect this.
*/
if (tvb_length(tvb) >= 4) {
if (try_val_to_str(tvb_get_ntohl(tvb, 0), vals_ddtp_version) == NULL)
return 0;
}
/* Indicate what kind of message this is. */
col_set_str (pinfo->cinfo, COL_PROTOCOL, "DDTP");
/* In case we throw an exception below. */
col_clear (pinfo->cinfo, COL_INFO);
if (tree) {
ti = proto_tree_add_item(tree, proto_ddtp, tvb, 0, -1, ENC_NA);
ddtp_tree = proto_item_add_subtree(ti, ett_ddtp);
proto_tree_add_item(ddtp_tree, hf_ddtp_version, tvb, 0, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(ddtp_tree, hf_ddtp_encrypt, tvb, 4, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(ddtp_tree, hf_ddtp_hostid, tvb, 8, 4, ENC_BIG_ENDIAN);
}
if (tvb_get_ntohl(tvb, 4) == DDTP_ENCRYPT_PLAINTEXT) {
if (tree)
proto_tree_add_item(ddtp_tree, hf_ddtp_msgtype, tvb, 12, 4, ENC_BIG_ENDIAN);
switch (tvb_get_ntohl(tvb, 12)) {
case DDTP_MESSAGE_ERROR :
col_set_str(pinfo->cinfo, COL_INFO, "Message Error");
break;
case DDTP_UPDATE_QUERY :
col_set_str(pinfo->cinfo, COL_INFO, "Update Query");
if (tree) {
proto_tree_add_item(ddtp_tree, hf_ddtp_opcode, tvb, 16, 4,
ENC_BIG_ENDIAN);
proto_tree_add_item(ddtp_tree, hf_ddtp_ipaddr, tvb, 20, 4,
ENC_BIG_ENDIAN);
}
break;
case DDTP_UPDATE_REPLY :
col_set_str(pinfo->cinfo, COL_INFO, "Update Reply");
if (tree) {
proto_tree_add_item(ddtp_tree, hf_ddtp_status, tvb, 16, 4,
ENC_BIG_ENDIAN);
}
break;
case DDTP_ALIVE_QUERY :
col_set_str(pinfo->cinfo, COL_INFO, "Alive Query");
if (tree) {
proto_tree_add_text(ddtp_tree, tvb, 16, 4, "Dummy : %u",
tvb_get_ntohl(tvb, 16));
}
break;
case DDTP_ALIVE_REPLY :
col_set_str(pinfo->cinfo, COL_INFO, "Alive Reply");
if (tree) {
proto_tree_add_text(ddtp_tree, tvb, 16, 4, "Dummy : %u",
tvb_get_ntohl(tvb, 16));
}
break;
default :
col_set_str(pinfo->cinfo, COL_INFO, "Unknown type");
if (tree) {
proto_tree_add_text(ddtp_tree, tvb, 12, 4, "Unknown type : %u",
tvb_get_ntohl(tvb, 12));
}
}
} else {
col_set_str(pinfo->cinfo, COL_INFO, "Encrypted payload");
}
return tvb_length(tvb);
}
void
proto_register_ddtp(void)
{
static hf_register_info hf_ddtp[] = {
{ &hf_ddtp_version,
{ "Version", "ddtp.version", FT_UINT32, BASE_DEC, VALS(vals_ddtp_version), 0x0,
NULL, HFILL }},
{ &hf_ddtp_encrypt,
{ "Encryption", "ddtp.encrypt", FT_UINT32, BASE_DEC, VALS(vals_ddtp_encrypt), 0x0,
"Encryption type", HFILL }},
{ &hf_ddtp_hostid,
{ "Hostid", "ddtp.hostid", FT_UINT32, BASE_DEC, NULL, 0x0,
"Host ID", HFILL }},
{ &hf_ddtp_msgtype,
{ "Message type", "ddtp.msgtype", FT_UINT32, BASE_DEC, VALS(vals_ddtp_msgtype), 0x0,
NULL, HFILL }},
{ &hf_ddtp_opcode,
{ "Opcode", "ddtp.opcode", FT_UINT32, BASE_DEC, VALS(vals_ddtp_opcode), 0x0,
"Update query opcode", HFILL }},
{ &hf_ddtp_ipaddr,
{ "IP address", "ddtp.ipaddr", FT_IPv4, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_ddtp_status,
{ "Status", "ddtp.status", FT_UINT32, BASE_DEC, VALS(vals_ddtp_status), 0x0,
"Update reply status", HFILL }}
};
static gint *ett[] = { &ett_ddtp };
proto_ddtp = proto_register_protocol("Dynamic DNS Tools Protocol",
"DDTP", "ddtp");
proto_register_field_array(proto_ddtp, hf_ddtp, array_length(hf_ddtp));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_ddtp(void)
{
dissector_handle_t ddtp_handle;
ddtp_handle = new_create_dissector_handle(dissect_ddtp, proto_ddtp);
dissector_add_uint("udp.port", UDP_PORT_DDTP, ddtp_handle);
}
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