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/* packet-hpext.c
* Routines for HP extended IEEE 802.2 LLC layer
* Jochen Friedrich <jochen@scram.de>
*
* $Id$
*
* 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 <glib.h>
#include <epan/packet.h>
#include <epan/xdlc.h>
#include <epan/etypes.h>
#include <epan/llcsaps.h>
#include "packet-hpext.h"
static dissector_table_t subdissector_table;
static dissector_handle_t data_handle;
static int proto_hpext = -1;
static int hf_hpext_dxsap = -1;
static int hf_hpext_sxsap = -1;
static gint ett_hpext = -1;
static const value_string xsap_vals[] = {
{ HPEXT_DXSAP, "RBOOT Destination Service Access Point" },
{ HPEXT_SXSAP, "RBOOT Source Service Access Point" },
{ HPEXT_HPSW, "HP Switch Protocol" },
{ HPEXT_SNMP, "SNMP" },
{ 0x00, NULL }
};
static void
dissect_hpext(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_tree *hpext_tree = NULL;
proto_item *ti = NULL;
guint16 dxsap, sxsap;
tvbuff_t *next_tvb;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "HPEXT");
dxsap = tvb_get_ntohs(tvb, 3);
sxsap = tvb_get_ntohs(tvb, 5);
if (tree) {
ti = proto_tree_add_item(tree, proto_hpext, tvb, 0, 7, ENC_NA);
hpext_tree = proto_item_add_subtree(ti, ett_hpext);
proto_tree_add_text(hpext_tree, tvb, 0, 3, "Reserved");
proto_tree_add_uint(hpext_tree, hf_hpext_dxsap, tvb, 3,
2, dxsap);
proto_tree_add_uint(hpext_tree, hf_hpext_sxsap, tvb, 5,
2, sxsap);
}
col_append_fstr(pinfo->cinfo, COL_INFO,
"; HPEXT; DXSAP %s, SXSAP %s",
val_to_str(dxsap, xsap_vals, "%04x"),
val_to_str(sxsap, xsap_vals, "%04x"));
if (tvb_length_remaining(tvb, 7) > 0) {
next_tvb = tvb_new_subset_remaining(tvb, 7);
if (!dissector_try_uint(subdissector_table,
dxsap, next_tvb, pinfo, tree)) {
call_dissector(data_handle, next_tvb, pinfo, tree);
}
}
}
void
proto_register_hpext(void)
{
static hf_register_info hf[] = {
{ &hf_hpext_dxsap,
{ "DXSAP", "hpext.dxsap", FT_UINT16, BASE_HEX,
VALS(xsap_vals), 0x0, NULL, HFILL }},
{ &hf_hpext_sxsap,
{ "SXSAP", "hpext.sxsap", FT_UINT16, BASE_HEX,
VALS(xsap_vals), 0x0, NULL, HFILL }}
};
static gint *ett[] = {
&ett_hpext
};
proto_hpext = proto_register_protocol(
"HP Extended Local-Link Control", "HPEXT", "hpext");
proto_register_field_array(proto_hpext, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
/* subdissector code */
subdissector_table = register_dissector_table("hpext.dxsap",
"HPEXT XSAP", FT_UINT16, BASE_HEX);
register_dissector("hpext", dissect_hpext, proto_hpext);
}
void
proto_reg_handoff_hpext(void)
{
dissector_handle_t hpext_handle;
data_handle = find_dissector("data");
hpext_handle = find_dissector("hpext");
dissector_add_uint("llc.dsap", SAP_HPEXT, hpext_handle);
}
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