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/* packet-rmcp.c
* Routines for RMCP packet dissection
*
* Duncan Laurie <duncan@sun.com>
*
* $Id: packet-rmcp.c,v 1.2 2003/06/04 08:51:36 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
*
* Copied from packet-tftp.c
*
* 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., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <glib.h>
#include <epan/packet.h>
/*
* See
*
* http://www.dmtf.org/standards/standard_alert.php
*
* (the ASF specification includes RMCP)
*/
static int proto_rmcp = -1;
static int hf_rmcp_version = -1;
static int hf_rmcp_sequence = -1;
static int hf_rmcp_class = -1;
static int hf_rmcp_type = -1;
static gint ett_rmcp = -1;
static gint ett_rmcp_typeclass = -1;
static dissector_handle_t data_handle;
static dissector_table_t rmcp_dissector_table;
#define UDP_PORT_RMCP 623
#define UDP_PORT_RMCP_SECURE 664
#define RMCP_TYPE_MASK 0x80
#define RMCP_TYPE_NORM 0x00
#define RMCP_TYPE_ACK 0x01
static const value_string rmcp_type_vals[] = {
{ RMCP_TYPE_NORM, "Normal RMCP" },
{ RMCP_TYPE_ACK, "RMCP ACK" },
{ 0, NULL }
};
#define RMCP_CLASS_MASK 0x1f
#define RMCP_CLASS_ASF 0x06
#define RMCP_CLASS_IPMI 0x07
#define RMCP_CLASS_OEM 0x08
static const value_string rmcp_class_vals[] = {
{ RMCP_CLASS_ASF, "ASF" },
{ RMCP_CLASS_IPMI, "IPMI" },
{ RMCP_CLASS_OEM, "OEM" },
{ 0, NULL }
};
static int
dissect_rmcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_tree *rmcp_tree = NULL, *field_tree;
proto_item *ti, *tf;
tvbuff_t *next_tvb;
guint8 class;
gchar *class_str;
guint8 type;
/*
* Check whether it's a known class value; if not, assume it's
* not RMCP.
*/
if (!tvb_bytes_exist(tvb, 3, 1))
return 0; /* class value byte not present */
class = tvb_get_guint8(tvb, 3);
/* Get the normal/ack bit from the RMCP class */
type = (class & RMCP_TYPE_MASK) >> 7;
class &= RMCP_CLASS_MASK;
class_str = match_strval(class, rmcp_class_vals);
if (class_str == NULL)
return 0; /* unknown class value */
if (check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, "RMCP");
if (check_col(pinfo->cinfo, COL_INFO))
col_add_fstr(pinfo->cinfo, COL_INFO, "%s, Class: %s",
val_to_str(type, rmcp_type_vals, "Unknown (0x%02x)"),
class_str);
if (tree) {
ti = proto_tree_add_protocol_format(tree, proto_rmcp, tvb, 0, 4,
"Remote Management Control Protocol, Class: %s",
class_str);
rmcp_tree = proto_item_add_subtree(ti, ett_rmcp);
proto_tree_add_item(rmcp_tree, hf_rmcp_version, tvb, 0, 1, TRUE);
proto_tree_add_item(rmcp_tree, hf_rmcp_sequence, tvb, 2, 1, TRUE);
tf = proto_tree_add_text(rmcp_tree, tvb, 3, 1, "Type: %s, Class: %s",
val_to_str(type, rmcp_type_vals, "Unknown (0x%02x)"),
class_str);
field_tree = proto_item_add_subtree(tf, ett_rmcp_typeclass);
proto_tree_add_item(field_tree, hf_rmcp_class, tvb, 3, 1, TRUE);
proto_tree_add_item(field_tree, hf_rmcp_type, tvb, 3, 1, TRUE);
}
next_tvb = tvb_new_subset(tvb, 4, -1, -1);
if (!dissector_try_port(rmcp_dissector_table, class, next_tvb, pinfo,
tree))
call_dissector(data_handle, next_tvb, pinfo, tree);
return tvb_length(tvb);
}
void
proto_register_rmcp(void)
{
static hf_register_info hf[] = {
{ &hf_rmcp_version, {
"Version", "rmcp.version",
FT_UINT8, BASE_HEX, NULL, 0,
"RMCP Version", HFILL }},
{ &hf_rmcp_sequence, {
"Sequence", "rmcp.sequence",
FT_UINT8, BASE_HEX, NULL, 0,
"RMCP Sequence", HFILL }},
{ &hf_rmcp_class, {
"Class", "rmcp.class",
FT_UINT8, BASE_HEX,
VALS(rmcp_class_vals), RMCP_CLASS_MASK,
"RMCP Class", HFILL }},
{ &hf_rmcp_type, {
"Message Type", "rmcp.type",
FT_UINT8, BASE_HEX,
VALS(rmcp_type_vals), RMCP_TYPE_MASK,
"RMCP Message Type", HFILL }},
};
static gint *ett[] = {
&ett_rmcp,
&ett_rmcp_typeclass,
};
proto_rmcp = proto_register_protocol(
"Remote Management Control Protocol", "RMCP", "rmcp");
proto_register_field_array(proto_rmcp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
rmcp_dissector_table = register_dissector_table(
"rmcp.class", "RMCP Class", FT_UINT8, BASE_HEX);
}
void
proto_reg_handoff_rmcp(void)
{
dissector_handle_t rmcp_handle;
data_handle = find_dissector("data");
rmcp_handle = new_create_dissector_handle(dissect_rmcp, proto_rmcp);
dissector_add("udp.port", UDP_PORT_RMCP, rmcp_handle);
dissector_add("udp.port", UDP_PORT_RMCP_SECURE, rmcp_handle);
}
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