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/* packet-hp-erm.c
* Routines for the disassembly of HP ProCurve encapsulated remote mirroring frames
* (Adapted from packet-cisco-erspan.c)
*
* $Id$
*
* Copyright 2010 William Meier <wmeier [AT] newsguy.com>
*
* 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.
*/
/*
* For some information on HP Procurve encapsulated remote mirroring see
* "Traffic Mirroring" in Appendix B of the HP manual
* "Management and Configuration Guide for the ProCurve Series
* 3500, 3500yl, 5400zl, 6200yl, 6600, and 8200zl Switches (September 2009)"
*
* Format:
* The above manual indicates that the encapsulatedmirrored frame is transmitted
* on the network as a [UDP] packet which has 54 bytes preceding the mirrored frame.
* Examining a sample capture shows that this means that the data payload
* of the UDP packet consists of a 12 byte "header" followed by the
* byes of the mirrored frame.
*
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <glib.h>
#include <epan/packet.h>
#include <epan/prefs.h>
#define PROTO_SHORT_NAME "HP_ERM"
#define PROTO_LONG_NAME "HP encapsulated remote mirroring"
static guint global_hp_erm_udp_port = 0;
static int proto_hp_erm = -1;
static gint ett_hp_erm = -1;
static int hf_hp_erm_unknown = -1;
static dissector_handle_t eth_withoutfcs_handle;
static void
dissect_hp_erm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_item *ti;
proto_tree *hp_erm_tree;
tvbuff_t *eth_tvb;
col_set_str(pinfo->cinfo, COL_PROTOCOL, PROTO_SHORT_NAME);
col_set_str(pinfo->cinfo, COL_INFO, PROTO_SHORT_NAME ":");
if (tree) {
ti = proto_tree_add_item(tree, proto_hp_erm, tvb, 0, -1, ENC_NA);
hp_erm_tree = proto_item_add_subtree(ti, ett_hp_erm);
proto_tree_add_item(hp_erm_tree, hf_hp_erm_unknown, tvb, 0, 12, ENC_NA);
}
eth_tvb = tvb_new_subset_remaining(tvb, 12);
call_dissector(eth_withoutfcs_handle, eth_tvb, pinfo, tree);
}
void
proto_register_hp_erm(void)
{
void proto_reg_handoff_hp_erm(void);
static hf_register_info hf[] = {
{ &hf_hp_erm_unknown,
{ "Unknown", "hp_erm.unknown", FT_BYTES, BASE_NONE, NULL,
0x00, NULL, HFILL }},
};
static gint *ett[] = {
&ett_hp_erm,
};
module_t *hp_erm_module;
proto_hp_erm = proto_register_protocol(PROTO_LONG_NAME, PROTO_SHORT_NAME, "hp_erm");
hp_erm_module = prefs_register_protocol(proto_hp_erm, proto_reg_handoff_hp_erm);
prefs_register_uint_preference(hp_erm_module, "udp.port", "HP_ERM UDP Port",
"Set the UDP port (source or destination) used for HP"
" encapsulated remote mirroring frames;\n"
"0 (default) means that the HP_ERM dissector is not active",
10, &global_hp_erm_udp_port);
proto_register_field_array(proto_hp_erm, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_hp_erm(void)
{
static dissector_handle_t hp_erm_handle;
static guint hp_erm_udp_port;
static gboolean initialized = FALSE;
if (!initialized) {
eth_withoutfcs_handle = find_dissector("eth_withoutfcs");
hp_erm_handle = create_dissector_handle(dissect_hp_erm, proto_hp_erm);
initialized = TRUE;
} else {
if (hp_erm_udp_port != 0)
dissector_delete_uint("udp.port", hp_erm_udp_port, hp_erm_handle);
}
hp_erm_udp_port = global_hp_erm_udp_port;
if (hp_erm_udp_port != 0)
dissector_add_uint("udp.port", hp_erm_udp_port, hp_erm_handle);
}
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