forked from osmocom/wireshark
104 lines
2.8 KiB
C
104 lines
2.8 KiB
C
/* packet-maccontrol.c
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* Routines for MAC Control ethernet header disassembly
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <glib.h>
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#include <epan/packet.h>
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#include "packet-ieee8023.h"
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#include "packet-llc.h"
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#include <epan/etypes.h>
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static int proto_macctrl = -1;
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static gint ett_macctrl = -1;
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static int hf_macctrl_pause = -1;
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static int hf_macctrl_quanta = -1;
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static void
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dissect_macctrl(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_tree *ti;
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proto_tree *volatile macctrl_tree;
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guint16 pause;
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guint16 pause_quanta;
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pause = tvb_get_ntohs(tvb, 0);
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pause_quanta = tvb_get_ntohs(tvb, 2);
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "CTRL");
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col_clear(pinfo->cinfo, COL_INFO);
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if (pause==1){
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_add_fstr(pinfo->cinfo, COL_INFO, "MAC PAUSE: Quanta %d", pause_quanta);
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}
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}
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macctrl_tree = NULL;
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if (tree) {
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ti = proto_tree_add_item(tree, proto_macctrl, tvb, 0, 4, FALSE);
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macctrl_tree = proto_item_add_subtree(ti, ett_macctrl);
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proto_tree_add_uint(macctrl_tree, hf_macctrl_pause, tvb, 0, 2, pause);
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proto_tree_add_uint(macctrl_tree, hf_macctrl_quanta, tvb, 2, 2, pause_quanta);
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}
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}
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void
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proto_register_macctrl(void)
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{
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static hf_register_info hf[] = {
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{ &hf_macctrl_pause,
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{ "Pause", "macctrl.pause", FT_UINT16, BASE_HEX,
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NULL, 0x0, "MAC control Pause", HFILL}},
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{ &hf_macctrl_quanta,
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{ "Quanta", "macctrl.quanta", FT_UINT16, BASE_DEC,
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NULL, 0x0, "MAC control quanta", HFILL }}
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};
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static gint *ett[] = {
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&ett_macctrl,
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};
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proto_macctrl = proto_register_protocol("MAC Control", "MACC", "macc");
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proto_register_field_array(proto_macctrl, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void
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proto_reg_handoff_macctrl(void)
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{
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dissector_handle_t macctrl_handle;
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macctrl_handle = create_dissector_handle(dissect_macctrl, proto_macctrl);
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dissector_add("ethertype", ETHERTYPE_MAC_CONTROL, macctrl_handle);
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}
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