![Bill Meier](/assets/img/avatar_default.png)
- Use col_...() fcns in the proper manner and order; - proto_reg_handoff...() not needed (does nothing useful); - remove some unneeded initializers; - reformat hf[] entries. svn path=/trunk/; revision=44000
255 lines
7.4 KiB
C
255 lines
7.4 KiB
C
/* packet-mpls-psc.c
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*
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* Routines for MPLS[-TP] Protection State Coordination (PSC) Protocol: it
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* should conform to RFC 6378.
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*
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* Copyright 2012 _FF_
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*
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* Francesco Fondelli <francesco dot fondelli, gmail dot com>
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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-ip.h>
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static gint proto_mpls_psc = -1;
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static gint ett_mpls_psc = -1;
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static int hf_mpls_psc_ver = -1;
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static int hf_mpls_psc_req = -1;
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static int hf_mpls_psc_pt = -1;
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static int hf_mpls_psc_rev = -1;
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static int hf_mpls_psc_fpath = -1;
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static int hf_mpls_psc_dpath = -1;
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static int hf_mpls_psc_tlvlen = -1;
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/*
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* FF: please keep this list in sync with
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* http://www.iana.org/assignments/mpls-oam-parameters/mpls-oam-parameters.xml
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* Registry Name: 'MPLS PSC Request'
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*/
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const range_string mpls_psc_req_rvals[] = {
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{ 0, 0, "No Request" },
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{ 1, 1, "Do Not Revert" },
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{ 2, 3, "Unassigned" },
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{ 4, 4, "Wait to Restore" },
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{ 5, 5, "Manual Switch" },
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{ 6, 6, "Unassigned" },
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{ 7, 7, "Signal Degrade" },
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{ 8, 9, "Unassigned" },
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{ 10, 10, "Signal Fail" },
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{ 11, 11, "Unassigned" },
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{ 12, 12, "Forced Switch" },
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{ 13, 13, "Unassigned" },
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{ 14, 14, "Lockout of protection" },
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{ 15, 15, "Unassigned" },
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{ 0, 0, NULL }
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};
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const value_string mpls_psc_req_short_vals[] = {
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{ 0, "NR" },
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{ 1, "DNR" },
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{ 4, "WTR" },
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{ 5, "MS" },
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{ 7, "SD" },
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{ 10, "SF" },
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{ 12, "FS" },
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{ 14, "LO" },
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{ 0, NULL }
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};
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const range_string mpls_psc_pt_rvals[] = {
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{ 0, 0, "for future extensions" },
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{ 1, 1, "unidirectional switching using a permanent bridge" },
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{ 2, 2, "bidirectional switching using a selector bridge" },
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{ 3, 3, "bidirectional switching using a permanent bridge" },
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{ 0, 0, NULL }
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};
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const range_string mpls_psc_rev_rvals[] = {
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{ 0, 0, "non-revertive mode" },
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{ 1, 1, "revertive mode" },
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{ 0, 0, NULL }
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};
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const range_string mpls_psc_fpath_rvals[] = {
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{ 0, 0, "protection" },
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{ 1, 1, "working" },
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{ 2, 255, "for future extensions" },
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{ 0, 0, NULL }
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};
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const range_string mpls_psc_dpath_rvals[] = {
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{ 0, 0, "protection is not in use" },
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{ 1, 1, "protection is in use" },
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{ 2, 255, "for future extensions" },
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{ 0, 0, NULL }
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};
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static void
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dissect_mpls_psc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_item *ti;
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proto_tree *psc_tree;
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guint32 offset = 0;
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guint8 req;
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guint8 fpath;
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guint8 path;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "PSC");
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col_clear(pinfo->cinfo, COL_INFO);
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/* build cinfo */
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req = (tvb_get_guint8(tvb, offset) & 0x3C) >> 2;
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fpath = tvb_get_guint8(tvb, offset + 2);
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path = tvb_get_guint8(tvb, offset + 3);
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col_add_fstr(pinfo->cinfo, COL_INFO,
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"%s(%u,%u)",
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val_to_str(req, mpls_psc_req_short_vals, "Unknown-Request"),
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fpath, path);
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if (!tree) {
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return;
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}
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/* create display subtree for the protocol */
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ti = proto_tree_add_item(tree, proto_mpls_psc, tvb, 0, -1, ENC_NA);
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psc_tree = proto_item_add_subtree(ti, ett_mpls_psc);
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/* version */
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proto_tree_add_item(psc_tree, hf_mpls_psc_ver, tvb, offset, 1, ENC_NA);
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/* request */
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proto_tree_add_item(psc_tree, hf_mpls_psc_req, tvb, offset, 1, ENC_NA);
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/* prot type */
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proto_tree_add_item(psc_tree, hf_mpls_psc_pt, tvb, offset, 1, ENC_NA);
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offset += 1;
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/* prot type */
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proto_tree_add_item(psc_tree, hf_mpls_psc_rev, tvb, offset, 1, ENC_NA);
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/* skip reserved1 */
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offset += 1;
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/* fpath */
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proto_tree_add_item(psc_tree, hf_mpls_psc_fpath, tvb, offset, 1, ENC_NA);
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offset += 1;
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/* path */
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proto_tree_add_item(psc_tree, hf_mpls_psc_dpath, tvb, offset, 1, ENC_NA);
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offset += 1;
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/* tlv len */
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proto_tree_add_item(psc_tree, hf_mpls_psc_tlvlen, tvb, offset, 1, ENC_BIG_ENDIAN);
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}
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void
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proto_register_mpls_psc(void)
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{
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static hf_register_info hf[] = {
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{
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&hf_mpls_psc_ver,
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{
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"Version", "mpls.psc.ver",
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FT_UINT8, BASE_DEC, NULL, 0xC0,
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NULL, HFILL
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}
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},
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{
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&hf_mpls_psc_req,
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{
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"Request", "mpls.psc.req",
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FT_UINT8, BASE_RANGE_STRING | BASE_DEC, RVALS(mpls_psc_req_rvals), 0x3C,
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NULL, HFILL
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}
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},
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{
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&hf_mpls_psc_pt,
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{
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"Protection Type", "mpls.psc.pt",
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FT_UINT8, BASE_RANGE_STRING | BASE_DEC, RVALS(mpls_psc_pt_rvals), 0x03,
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NULL, HFILL
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}
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},
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{
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&hf_mpls_psc_rev,
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{
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"R", "mpls.psc.rev",
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FT_UINT8, BASE_RANGE_STRING | BASE_DEC, RVALS(mpls_psc_rev_rvals), 0x80,
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NULL, HFILL
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}
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},
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{
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&hf_mpls_psc_fpath,
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{
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"Fault Path", "mpls.psc.fpath",
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FT_UINT8, BASE_RANGE_STRING | BASE_DEC, RVALS(mpls_psc_fpath_rvals), 0x0,
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NULL, HFILL
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}
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},
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{
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&hf_mpls_psc_dpath,
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{
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"Data Path", "mpls.psc.dpath",
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FT_UINT8, BASE_RANGE_STRING | BASE_DEC, RVALS(mpls_psc_dpath_rvals), 0x0,
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NULL, HFILL
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}
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},
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{
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&hf_mpls_psc_tlvlen,
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{
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"TLV Length", "mpls.psc.tlvlen",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL
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}
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},
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};
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static gint *ett[] = {
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&ett_mpls_psc,
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};
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proto_mpls_psc =
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proto_register_protocol("PSC", "MPLS[-TP] Protection State "
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"Coordination (PSC) Protocol",
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"mplspsc");
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proto_register_field_array(proto_mpls_psc, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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register_dissector("mpls_psc", dissect_mpls_psc, proto_mpls_psc);
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}
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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