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/* packet-maccontrol.c
* Routines for MAC Control ethernet header disassembly
*
* $Id$
*
* 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., 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>
#include "packet-ieee8023.h"
#include "packet-llc.h"
#include <epan/etypes.h>
static int proto_macctrl = -1;
static gint ett_macctrl = -1;
static int hf_macctrl_pause = -1;
static int hf_macctrl_quanta = -1;
static void
dissect_macctrl(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_tree *ti;
proto_tree *volatile macctrl_tree;
guint16 pause;
guint16 pause_quanta;
pause = tvb_get_ntohs(tvb, 0);
pause_quanta = tvb_get_ntohs(tvb, 2);
if (check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, "CTRL");
if (check_col(pinfo->cinfo, COL_INFO))
col_clear(pinfo->cinfo, COL_INFO);
if (pause==1){
if (check_col(pinfo->cinfo, COL_INFO)) {
col_add_fstr(pinfo->cinfo, COL_INFO, "MAC PAUSE: Quanta %d", pause_quanta);
}
}
macctrl_tree = NULL;
if (tree) {
ti = proto_tree_add_item(tree, proto_macctrl, tvb, 0, 4, FALSE);
macctrl_tree = proto_item_add_subtree(ti, ett_macctrl);
proto_tree_add_uint(macctrl_tree, hf_macctrl_pause, tvb, 0, 2, pause);
proto_tree_add_uint(macctrl_tree, hf_macctrl_quanta, tvb, 2, 2, pause_quanta);
}
}
void
proto_register_macctrl(void)
{
static hf_register_info hf[] = {
{ &hf_macctrl_pause,
{ "Pause", "macctrl.pause", FT_UINT16, BASE_HEX,
NULL, 0x0, "MAC control Pause", HFILL}},
{ &hf_macctrl_quanta,
{ "Quanta", "macctrl.quanta", FT_UINT16, BASE_DEC,
NULL, 0x0, "MAC control quanta", HFILL }}
};
static gint *ett[] = {
&ett_macctrl,
};
proto_macctrl = proto_register_protocol("MAC Control", "MACC", "macc");
proto_register_field_array(proto_macctrl, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_macctrl(void)
{
dissector_handle_t macctrl_handle;
macctrl_handle = create_dissector_handle(dissect_macctrl, proto_macctrl);
dissector_add("ethertype", ETHERTYPE_MAC_CONTROL, macctrl_handle);
}
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