wireshark/epan/dissectors/packet-nwmtp.c
Michael Mann 2eb7b05b8c Convert most UDP dissectors to use "auto" preferences.
Similar to the "tcp.port" changes in I99604f95d426ad345f4b494598d94178b886eb67,
convert dissectors that use "udp.port".

More cleanup done on dissectors that use both TCP and UDP dissector
tables, so that less preference callbacks exist.

Change-Id: If07be9b9e850c244336a7069599cd554ce312dd3
Reviewed-on: https://code.wireshark.org/review/18120
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
2016-10-13 02:51:18 +00:00

182 lines
5.2 KiB
C

/* packet-nwmtp.c
* Routines for NexusWare MTP3 over UDP transport
* Copyright 2010 by Holger Hans Peter Freyther <zecke@selfish.org>
* Copyright 2010 by On-Waves
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* 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 <epan/packet.h>
void proto_register_mwmtp(void);
void proto_reg_handoff_nwmtp(void);
static dissector_handle_t mtp_handle;
static gint proto_nwmtp = -1;
static int hf_nwmtp_transp_type = -1;
static int hf_nwmtp_user_context = -1;
static int hf_nwmtp_data_type = -1;
static int hf_nwmtp_data_index = -1;
static int hf_nwmtp_data_length = -1;
/* subtree pointer */
static gint ett_mwmtp = -1;
static dissector_handle_t nwmtp_handle;
static const value_string nwmtp_transport_type_vals[] = {
{ 2, "UDP" },
{ 3, "TCP" },
{ 0, NULL },
};
static const value_string nwmtp_data_type_vals[] = {
{ 0, "MSU Prio 0" },
{ 1, "MSU Prio 1" },
{ 2, "MSU Prio 2" },
{ 3, "MSU Prio 3" },
{16, "Retrieved MSU Prio 0" },
{17, "Retrieved MSU Prio 0" },
{18, "Retrieved MSU Prio 0" },
{32, "Retrieval complete" },
{33, "Retrieval impossible" },
{34, "Link in service" },
{35, "Link out of service" },
{ 0, NULL },
};
static int dissect_nwmtp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
gint offset = 0;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "NW MTP");
col_clear(pinfo->cinfo, COL_INFO);
while (tvb_reported_length_remaining(tvb, offset) > 0) {
const gchar *type;
proto_item *ti;
proto_item *nwmtp_tree;
guint32 len;
tvbuff_t *next_tvb;
/* update the info column */
type = val_to_str_const(tvb_get_guint8(tvb, offset + 1),
nwmtp_data_type_vals, "Unknown");
col_set_str(pinfo->cinfo, COL_INFO, type);
len = tvb_get_ntohl(tvb, offset + 8);
if (tree) {
ti = proto_tree_add_protocol_format(tree, proto_nwmtp,
tvb, offset, len + 12,
"NexusWare C7 UDP Protocol");
nwmtp_tree = proto_item_add_subtree(ti, ett_mwmtp);
proto_tree_add_item(nwmtp_tree, hf_nwmtp_transp_type,
tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(nwmtp_tree, hf_nwmtp_data_type,
tvb, offset + 1, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(nwmtp_tree, hf_nwmtp_data_index,
tvb, offset + 2, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(nwmtp_tree, hf_nwmtp_user_context,
tvb, offset + 4, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(nwmtp_tree, hf_nwmtp_data_length,
tvb, offset + 8, 4, ENC_BIG_ENDIAN);
}
next_tvb = tvb_new_subset_length(tvb, offset + 12, len);
if (tvb_reported_length(next_tvb) > 0)
call_dissector(mtp_handle, next_tvb, pinfo, tree);
/* Check for overflows, which probably can't happen, but better
* safe than sorry. See
* https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=8169
*/
DISSECTOR_ASSERT(len < G_MAXUINT32 - 11);
DISSECTOR_ASSERT((guint64)offset + len + 12 < G_MAXINT);
offset += len + 12;
}
return tvb_captured_length(tvb);
}
void proto_register_mwmtp(void)
{
static hf_register_info hf[] = {
{&hf_nwmtp_transp_type,
{"Transport Type", "nwmtp.transp_type",
FT_UINT8, BASE_DEC, VALS(nwmtp_transport_type_vals), 0x0,
"The Transport Type", HFILL}
},
{&hf_nwmtp_data_type,
{"Data Type", "nwmtp.data_type",
FT_UINT8, BASE_DEC, VALS(nwmtp_data_type_vals), 0x0,
"The Data Type", HFILL}
},
{&hf_nwmtp_data_index,
{"Link Index", "nwmtp.link_index",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_nwmtp_user_context,
{"User Context", "nwmtp.user_context",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Use Context", HFILL}
},
{&hf_nwmtp_data_length,
{"Length", "nwmtp.data_length",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Data Length", HFILL}
},
};
static gint *ett[] = {
&ett_mwmtp,
};
proto_nwmtp =
proto_register_protocol("NexusWare C7 MTP", "MTP over NW UDP", "nw_mtp");
proto_register_field_array(proto_nwmtp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
nwmtp_handle = register_dissector("nw_mtp", dissect_nwmtp, proto_nwmtp);
}
void proto_reg_handoff_nwmtp(void)
{
dissector_add_for_decode_as_with_preference("udp.port", nwmtp_handle);
mtp_handle = find_dissector_add_dependency("mtp3", proto_nwmtp);
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/