/* packet-maccontrol.c * Routines for MAC Control ethernet header disassembly * * $Id$ * * Wireshark - Network traffic analyzer * By Gerald Combs * 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. */ /* * 04/26/2010: WMeier: "Class-Based Flow Control [CBFC] Pause Frame" dissection added * See: http://www.ieee802.org/1/files/public/docs2007/new-cm-barrass-pause-proposal.pdf */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include "packet-ieee8023.h" #include "packet-llc.h" #include static int proto_macctrl = -1; static int hf_macctrl_opcode = -1; static int hf_macctrl_pause_time = -1; static int hf_macctrl_cbfc_enbv = -1; static int hf_macctrl_cbfc_enbv_c0 = -1; static int hf_macctrl_cbfc_enbv_c1 = -1; static int hf_macctrl_cbfc_enbv_c2 = -1; static int hf_macctrl_cbfc_enbv_c3 = -1; static int hf_macctrl_cbfc_enbv_c4 = -1; static int hf_macctrl_cbfc_enbv_c5 = -1; static int hf_macctrl_cbfc_enbv_c6 = -1; static int hf_macctrl_cbfc_enbv_c7 = -1; static int hf_macctrl_cbfc_pause_time_c0 = -1; static int hf_macctrl_cbfc_pause_time_c1 = -1; static int hf_macctrl_cbfc_pause_time_c2 = -1; static int hf_macctrl_cbfc_pause_time_c3 = -1; static int hf_macctrl_cbfc_pause_time_c4 = -1; static int hf_macctrl_cbfc_pause_time_c5 = -1; static int hf_macctrl_cbfc_pause_time_c6 = -1; static int hf_macctrl_cbfc_pause_time_c7 = -1; static gint ett_macctrl = -1; static gint ett_macctrl_cbfc_enbv = -1; static gint ett_macctrl_cbfc_pause_times = -1; static const int *macctrl_cbfc_enbv_list[] = { &hf_macctrl_cbfc_enbv_c0, &hf_macctrl_cbfc_enbv_c1, &hf_macctrl_cbfc_enbv_c2, &hf_macctrl_cbfc_enbv_c3, &hf_macctrl_cbfc_enbv_c4, &hf_macctrl_cbfc_enbv_c5, &hf_macctrl_cbfc_enbv_c6, &hf_macctrl_cbfc_enbv_c7, NULL }; static const int *macctrl_cbfc_pause_times_list[] = { &hf_macctrl_cbfc_pause_time_c0, &hf_macctrl_cbfc_pause_time_c1, &hf_macctrl_cbfc_pause_time_c2, &hf_macctrl_cbfc_pause_time_c3, &hf_macctrl_cbfc_pause_time_c4, &hf_macctrl_cbfc_pause_time_c5, &hf_macctrl_cbfc_pause_time_c6, &hf_macctrl_cbfc_pause_time_c7 }; #define MACCTRL_PAUSE 0x0001 #define MACCTRL_CLASS_BASED_FLOW_CNTRL_PAUSE 0x0101 static const value_string opcode_vals[] = { { MACCTRL_PAUSE, "Pause" }, { MACCTRL_CLASS_BASED_FLOW_CNTRL_PAUSE, "Class Based Flow Control [CBFC] Pause" }, { 0, NULL } }; static void dissect_macctrl(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { proto_tree *ti; proto_tree *macctrl_tree = NULL; proto_tree *pause_times_tree = NULL; guint16 opcode; guint16 pause_time; col_set_str(pinfo->cinfo, COL_PROTOCOL, "MAC CTRL"); col_clear(pinfo->cinfo, COL_INFO); opcode = tvb_get_ntohs(tvb, 0); if (tree) { ti = proto_tree_add_item(tree, proto_macctrl, tvb, 0, 46, ENC_NA); macctrl_tree = proto_item_add_subtree(ti, ett_macctrl); proto_tree_add_uint(macctrl_tree, hf_macctrl_opcode, tvb, 0, 2, opcode); } switch (opcode) { case MACCTRL_PAUSE: pause_time = tvb_get_ntohs(tvb, 2); col_add_fstr(pinfo->cinfo, COL_INFO, "MAC PAUSE: pause_time: %u quanta", pause_time); if (tree) proto_tree_add_uint(macctrl_tree, hf_macctrl_pause_time, tvb, 2, 2, pause_time); break; case MACCTRL_CLASS_BASED_FLOW_CNTRL_PAUSE: col_set_str(pinfo->cinfo, COL_INFO, "MAC CLASS BASED FLOW CONTROL PAUSE"); if (tree) { int i; proto_tree_add_bitmask(macctrl_tree, tvb, 2, hf_macctrl_cbfc_enbv, ett_macctrl_cbfc_enbv, macctrl_cbfc_enbv_list, ENC_BIG_ENDIAN); ti = proto_tree_add_text(macctrl_tree, tvb, 4, 8*2, "CBFC Class Pause Times"); pause_times_tree = proto_item_add_subtree(ti, ett_macctrl_cbfc_pause_times); for (i=0; i<8; i++) { proto_tree_add_item(pause_times_tree, *macctrl_cbfc_pause_times_list[i], tvb, 4+i*2, 2, ENC_BIG_ENDIAN); } } break; } } void proto_register_macctrl(void) { static hf_register_info hf[] = { { &hf_macctrl_opcode, { "Opcode", "macc.opcode", FT_UINT16, BASE_HEX, VALS(opcode_vals), 0x0, "MAC Control opcode", HFILL}}, { &hf_macctrl_pause_time, { "pause_time", "macc.pause_time", FT_UINT16, BASE_DEC, NULL, 0x0, "MAC control PAUSE frame pause_time", HFILL }}, { &hf_macctrl_cbfc_enbv, { "CBFC Class Enable Vector", "macc.cbfc.enbv", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_macctrl_cbfc_enbv_c0, { "C0", "macc.cbfc.enbv.c0", FT_BOOLEAN, 16, NULL, 0x01, NULL, HFILL }}, { &hf_macctrl_cbfc_enbv_c1, { "C1", "macc.cbfc.enbv.c1", FT_BOOLEAN, 16, NULL, 0x02, NULL, HFILL }}, { &hf_macctrl_cbfc_enbv_c2, { "C2", "macc.cbfc.enbv.c2", FT_BOOLEAN, 16, NULL, 0x04, NULL, HFILL }}, { &hf_macctrl_cbfc_enbv_c3, { "C3", "macc.cbfc.enbv.c3", FT_BOOLEAN, 16, NULL, 0x08, NULL, HFILL }}, { &hf_macctrl_cbfc_enbv_c4, { "C4", "macc.cbfc.enbv.c4", FT_BOOLEAN, 16, NULL, 0x10, NULL, HFILL }}, { &hf_macctrl_cbfc_enbv_c5, { "C5", "macc.cbfc.enbv.c5", FT_BOOLEAN, 16, NULL, 0x20, NULL, HFILL }}, { &hf_macctrl_cbfc_enbv_c6, { "C6", "macc.cbfc.enbv.c6", FT_BOOLEAN, 16, NULL, 0x40, NULL, HFILL }}, { &hf_macctrl_cbfc_enbv_c7, { "C7", "macc.cbfc.enbv.c7", FT_BOOLEAN, 16, NULL, 0x80, NULL, HFILL }}, { &hf_macctrl_cbfc_pause_time_c0, { "C0", "macc.cbfc.pause_time.c0", FT_UINT16, BASE_DEC, NULL, 0x00, NULL, HFILL }}, { &hf_macctrl_cbfc_pause_time_c1, { "C1", "macc.cbfc.pause_time.c1", FT_UINT16, BASE_DEC, NULL, 0x00, NULL, HFILL }}, { &hf_macctrl_cbfc_pause_time_c2, { "C2", "macc.cbfc.pause_time.c2", FT_UINT16, BASE_DEC, NULL, 0x00, NULL, HFILL }}, { &hf_macctrl_cbfc_pause_time_c3, { "C3", "macc.cbfc.pause_time.c3", FT_UINT16, BASE_DEC, NULL, 0x00, NULL, HFILL }}, { &hf_macctrl_cbfc_pause_time_c4, { "C4", "macc.cbfc.pause_time.c4", FT_UINT16, BASE_DEC, NULL, 0x00, NULL, HFILL }}, { &hf_macctrl_cbfc_pause_time_c5, { "C5", "macc.cbfc.pause_time.c5", FT_UINT16, BASE_DEC, NULL, 0x00, NULL, HFILL }}, { &hf_macctrl_cbfc_pause_time_c6, { "C6", "macc.cbfc.pause_time.c6", FT_UINT16, BASE_DEC, NULL, 0x00, NULL, HFILL }}, { &hf_macctrl_cbfc_pause_time_c7, { "C7", "macc.cbfc.pause_time.c7", FT_UINT16, BASE_DEC, NULL, 0x00, NULL, HFILL }} }; static gint *ett[] = { &ett_macctrl, &ett_macctrl_cbfc_enbv, &ett_macctrl_cbfc_pause_times }; 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_uint("ethertype", ETHERTYPE_MAC_CONTROL, macctrl_handle); }