2012-03-11 19:05:32 +00:00
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/* packet-mpls-y1711.c
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* Routines for (old) ITU-T MPLS OAM: it conforms to ITU-T Y.1711 and RFC 3429
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*
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* Copyright 2006, 2011 _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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2012-06-28 23:18:38 +00:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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2012-03-11 19:05:32 +00:00
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*/
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/*
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* FF: NOTES
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*
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2012-09-28 19:50:49 +00:00
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* - this should dissect OAM pdus (identified by the MPLS_LABEL_OAM_ALERT = 14
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2012-03-11 19:05:32 +00:00
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* label) as described in ITU-T Y.1711 and RFC 3429.
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*
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* - this code used to be (since 2006) in packet-mpls.c ... nobody on this
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* planet is using Y.1711 today (?), so thanks to the mpls subdissector
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* table indexed by label value it has been moved here.
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*/
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#include "config.h"
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#include <glib.h>
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2012-05-15 19:23:35 +00:00
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2012-03-11 19:05:32 +00:00
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#include <epan/packet.h>
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#include <epan/addr_resolv.h>
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#include "packet-mpls.h"
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static gint proto_mpls_y1711 = -1;
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static int hf_mpls_y1711_function_type = -1;
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2013-01-26 22:43:34 +00:00
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/* static int hf_mpls_y1711_ttsi = -1; */
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2012-03-11 19:05:32 +00:00
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static int hf_mpls_y1711_frequency = -1;
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static int hf_mpls_y1711_defect_type = -1;
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static int hf_mpls_y1711_defect_location = -1;
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static int hf_mpls_y1711_bip16 = -1;
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static gint ett_mpls_y1711 = -1;
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static dissector_handle_t mpls_y1711_handle;
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2012-07-29 19:47:50 +00:00
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static dissector_handle_t data_handle;
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2012-03-11 19:05:32 +00:00
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static const value_string y1711_function_type_vals[] = {
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{0x00, "Reserved" },
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{0x01, "CV (Connectivity Verification)" },
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{0x02, "FDI (Forward Defect Indicator)" },
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{0x03, "BDI (Backward Defect Indicator)" },
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{0x04, "Reserved for Performance packets" },
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{0x05, "Reserved for LB-Req (Loopback Request)" },
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{0x06, "Reserved for LB-Rsp (Loopback Response)"},
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{0x07, "FDD (Fast Failure Detection)" },
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{0, NULL }
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};
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static const value_string y1711_frequency_vals[] = {
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{0x00, "Reserved" },
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{0x01, "10 ms" },
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{0x02, "20 ms" },
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{0x03, "50 ms (default value)"},
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{0x04, "100 ms" },
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{0x05, "200 ms" },
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{0x06, "500 ms" },
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/* 7-255 Reserved */
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{0, NULL }
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};
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static const value_string y1711_defect_type_vals[] = {
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{0x0000, "Reserved" },
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{0x0101, "dServer" },
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{0x0102, "dPeerME" },
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{0x0201, "dLOCV" },
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{0x0202, "dTTSI_Mismatch"},
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{0x0203, "dTTSI_Mismerge"},
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{0x0204, "dExcess" },
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{0x02FF, "dUnknown" },
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{0xFFFF, "Reserved" },
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{0, NULL }
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};
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static int
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2012-09-10 21:40:21 +00:00
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dissect_mpls_y1711(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
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2012-03-11 19:05:32 +00:00
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{
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2013-03-19 19:28:57 +00:00
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struct mplsinfo *mplsinfo = (struct mplsinfo *)pinfo->private_data;
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2012-03-21 18:20:44 +00:00
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int offset = 0;
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2012-07-29 20:11:33 +00:00
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proto_item *ti;
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proto_tree *mpls_y1711_tree;
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int functype;
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tvbuff_t *data_tvb;
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2012-07-29 19:47:50 +00:00
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2012-07-29 20:11:33 +00:00
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static const guint8 allone[] = { 0xff, 0xff };
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static const guint8 allzero[] = { 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00 };
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2012-03-21 18:20:44 +00:00
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2012-07-29 19:47:50 +00:00
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functype = tvb_get_guint8(tvb, offset);
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2012-09-28 19:50:49 +00:00
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_append_fstr(pinfo->cinfo, COL_INFO, " (Y.1711: %s)",
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(functype == 0x01) ? "CV" :
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(functype == 0x02) ? "FDI" :
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(functype == 0x03) ? "BDI" :
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(functype == 0x07) ? "FDD" :
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"reserved/unknown");
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}
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2012-03-11 19:05:32 +00:00
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/* sanity checks */
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2012-07-29 19:47:50 +00:00
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if (tvb_reported_length(tvb) < 44) {
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2012-03-11 19:05:32 +00:00
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/*
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* ITU-T Y.1711, 5.3: PDUs must have a minimum payload length of
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* 44 bytes
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*/
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proto_tree_add_text(tree, tvb, offset, -1,
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"Error: must have a minimum payload "
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"length of 44 bytes");
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2012-07-29 19:47:50 +00:00
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data_tvb = tvb_new_subset_remaining(tvb, offset);
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call_dissector(data_handle, data_tvb, pinfo, tree);
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return tvb_reported_length(tvb);
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2012-03-11 19:05:32 +00:00
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}
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2012-07-29 20:11:33 +00:00
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if (!tree)
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return tvb_reported_length(tvb);
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2012-03-11 19:05:32 +00:00
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ti = proto_tree_add_text(tree, tvb, offset, 44, "Y.1711 OAM");
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mpls_y1711_tree = proto_item_add_subtree(ti, ett_mpls_y1711);
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/* checks for exp, bos and ttl encoding */
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2012-09-28 19:50:49 +00:00
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if (mplsinfo->label != MPLS_LABEL_OAM_ALERT)
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2012-03-11 19:05:32 +00:00
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proto_tree_add_text(mpls_y1711_tree, tvb, offset - 4, 3,
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2012-03-21 18:20:44 +00:00
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"Warning: Y.1711 but no OAM alert label (%d) ?!",
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2012-09-28 19:50:49 +00:00
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MPLS_LABEL_OAM_ALERT);
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2012-03-11 19:05:32 +00:00
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if (mplsinfo->exp != 0)
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proto_tree_add_text(mpls_y1711_tree, tvb, offset - 2, 1,
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"Warning: Exp bits should be 0 for Y.1711");
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if (mplsinfo->bos != 1)
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proto_tree_add_text(mpls_y1711_tree, tvb, offset - 2, 1,
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"Warning: S bit should be 1 for Y.1711");
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if (mplsinfo->ttl != 1)
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proto_tree_add_text(mpls_y1711_tree, tvb, offset - 1, 1,
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"Warning: TTL should be 1 for Y.1711");
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/* starting dissection */
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functype = tvb_get_guint8(tvb, offset);
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proto_tree_add_item(mpls_y1711_tree, hf_mpls_y1711_function_type, tvb,
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offset, 1,
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ENC_LITTLE_ENDIAN);
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offset++;
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switch (functype) {
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case 0x01: /* CV */
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{
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guint32 lsrid_ipv4addr;
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/* 3 octets reserved (all 0x00) */
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if (tvb_memeql(tvb, offset, allzero, 3) == -1) {
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proto_tree_add_text(mpls_y1711_tree, tvb, offset, 3,
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"Error: these bytes are reserved and "
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"must be 0x00");
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}
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offset += 3;
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/* ttsi (ipv4 flavor as in RFC 2373) */
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if (tvb_memeql(tvb, offset, allzero, 10) == -1) {
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proto_tree_add_text(mpls_y1711_tree, tvb, offset, 10,
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"Error: these bytes are padding "
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"and must be 0x00");
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}
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offset += 10;
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if (tvb_memeql(tvb, offset, allone, 2) == -1) {
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proto_tree_add_text(mpls_y1711_tree, tvb, offset, 2,
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"Error: these bytes are padding "
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"and must be 0xFF");
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}
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offset += 2;
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lsrid_ipv4addr = tvb_get_ipv4(tvb, offset);
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proto_tree_add_text(mpls_y1711_tree, tvb, offset, 4, "LSR ID: %s",
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ip_to_str((guint8 *) &lsrid_ipv4addr));
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offset += 4;
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proto_tree_add_text(mpls_y1711_tree, tvb, offset, 4, "LSP ID: %d",
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tvb_get_ntohl(tvb, offset));
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offset += 4;
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/* 18 octets of padding (all 0x00) */
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if (tvb_memeql(tvb, offset, allzero, 18) == -1) {
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proto_tree_add_text(mpls_y1711_tree, tvb, offset, 18,
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"Error: these bytes are padding "
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"and must be 0x00");
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}
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offset += 18;
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}
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break;
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case 0x02: /* FDI */
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case 0x03: /* BDI */
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{
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guint32 lsrid_ipv4addr;
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/* 1 octets reserved (all 0x00) */
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if (tvb_memeql(tvb, offset, allzero, 1) == -1) {
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proto_tree_add_text(mpls_y1711_tree, tvb, offset, 3,
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"Error: this byte is reserved "
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"and must be 0x00");
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}
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offset++;
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proto_tree_add_item(mpls_y1711_tree, hf_mpls_y1711_defect_type, tvb,
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offset, 2,
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ENC_LITTLE_ENDIAN);
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offset += 2;
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/*
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* ttsi (ipv4 flavor as in RFC 2373) is optional if not used must
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* be set to all 0x00
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*/
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if (tvb_memeql(tvb, offset, allzero, 20) == 0) {
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proto_tree_add_text(mpls_y1711_tree, tvb, offset, 20,
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"TTSI not preset (optional for FDI/BDI)");
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offset += 20;
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} else {
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if (tvb_memeql(tvb, offset, allzero, 10) == -1) {
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proto_tree_add_text(mpls_y1711_tree, tvb, offset, 10,
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"Error: these bytes are padding and "
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"must be 0x00");
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}
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offset += 10;
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if (tvb_memeql(tvb, offset, allone, 2) == -1) {
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proto_tree_add_text(mpls_y1711_tree, tvb, offset, 2,
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"Error: these bytes are padding and "
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"must be 0xFF");
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}
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offset += 2;
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lsrid_ipv4addr = tvb_get_ipv4(tvb, offset);
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proto_tree_add_text(mpls_y1711_tree, tvb, offset, 4, "LSR ID: %s",
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ip_to_str((guint8 *) &lsrid_ipv4addr));
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offset += 4;
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proto_tree_add_text(mpls_y1711_tree, tvb, offset, 4, "LSP ID: %d",
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tvb_get_ntohl(tvb, offset));
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offset += 4;
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}
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/* defect location */
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proto_tree_add_item(mpls_y1711_tree, hf_mpls_y1711_defect_location, tvb,
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offset, 4,
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ENC_LITTLE_ENDIAN);
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offset += 4;
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/* 14 octets of padding (all 0x00) */
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if (tvb_memeql(tvb, offset, allzero, 14) == -1) {
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proto_tree_add_text(mpls_y1711_tree, tvb, offset, 14,
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"Error: these bytes are padding "
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"and must be 0x00");
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}
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offset += 14;
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}
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break;
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case 0x07: /* FDD */
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{
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guint32 lsrid_ipv4addr;
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/* 3 octets reserved (all 0x00) */
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if (tvb_memeql(tvb, offset, allzero, 3) == -1) {
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proto_tree_add_text(mpls_y1711_tree, tvb, offset, 3,
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"Error: these bytes are "
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"reserved and must be 0x00");
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}
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offset += 3;
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/* ttsi (ipv4 flavor as in RFC 2373) */
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if (tvb_memeql(tvb, offset, allzero, 10) == -1) {
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proto_tree_add_text(mpls_y1711_tree, tvb, offset, 10,
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"Error: these bytes are padding and "
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"must be 0x00");
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}
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offset += 10;
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if (tvb_memeql(tvb, offset, allone, 2) == -1) {
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proto_tree_add_text(mpls_y1711_tree, tvb, offset, 2,
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"Error: these bytes are padding and "
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"must be 0xFF");
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}
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offset += 2;
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lsrid_ipv4addr = tvb_get_ipv4(tvb, offset);
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proto_tree_add_text(mpls_y1711_tree, tvb, offset, 4, "LSR ID: %s",
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ip_to_str((guint8 *)&lsrid_ipv4addr));
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offset += 4;
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|
proto_tree_add_text(mpls_y1711_tree, tvb, offset, 4, "LSP ID: %d",
|
|
|
|
tvb_get_ntohl(tvb,offset));
|
|
|
|
offset += 4;
|
|
|
|
|
|
|
|
proto_tree_add_item(mpls_y1711_tree, hf_mpls_y1711_frequency, tvb,
|
|
|
|
offset, 1,
|
|
|
|
ENC_LITTLE_ENDIAN);
|
|
|
|
offset++;
|
|
|
|
|
|
|
|
/* 17 octets of padding (all 0x00) */
|
|
|
|
if (tvb_memeql(tvb, offset, allzero, 17) == -1) {
|
|
|
|
proto_tree_add_text(mpls_y1711_tree, tvb, offset, 17,
|
|
|
|
"Error: these bytes are padding and "
|
|
|
|
"must be 0x00");
|
|
|
|
}
|
|
|
|
offset += 17;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
proto_tree_add_text(mpls_y1711_tree, tvb, offset - 1, -1,
|
|
|
|
"Unknown MPLS Y.1711 PDU");
|
|
|
|
return offset;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* BIP16 */
|
|
|
|
proto_tree_add_item(mpls_y1711_tree, hf_mpls_y1711_bip16, tvb, offset, 2,
|
|
|
|
ENC_LITTLE_ENDIAN);
|
|
|
|
offset += 2;
|
|
|
|
|
|
|
|
return offset;
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
proto_register_mpls_y1711(void)
|
|
|
|
{
|
|
|
|
static hf_register_info hf[] = {
|
|
|
|
{
|
|
|
|
&hf_mpls_y1711_function_type,
|
|
|
|
{
|
2012-08-15 15:52:27 +00:00
|
|
|
"Function Type", "mpls_y1711.function_type", FT_UINT8,
|
2012-03-11 19:05:32 +00:00
|
|
|
BASE_HEX, VALS(y1711_function_type_vals),
|
|
|
|
0x0, "Function Type codepoint", HFILL
|
|
|
|
}
|
|
|
|
},
|
2013-01-31 18:35:06 +00:00
|
|
|
#if 0
|
2012-03-11 19:05:32 +00:00
|
|
|
{
|
|
|
|
&hf_mpls_y1711_ttsi,
|
|
|
|
{
|
|
|
|
"Trail Termination Source Identifier",
|
2012-08-15 15:52:27 +00:00
|
|
|
"mpls_y1711.ttsi",
|
2012-03-11 19:05:32 +00:00
|
|
|
FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL
|
|
|
|
}
|
|
|
|
},
|
2013-01-31 18:35:06 +00:00
|
|
|
#endif
|
2012-03-11 19:05:32 +00:00
|
|
|
{
|
|
|
|
&hf_mpls_y1711_frequency,
|
|
|
|
{
|
2012-08-15 15:52:27 +00:00
|
|
|
"Frequency", "mpls_y1711.frequency", FT_UINT8,
|
2012-03-11 19:05:32 +00:00
|
|
|
BASE_HEX, VALS(y1711_frequency_vals), 0x0,
|
|
|
|
"Frequency of probe injection", HFILL
|
|
|
|
}
|
|
|
|
},
|
|
|
|
{
|
|
|
|
&hf_mpls_y1711_defect_type,
|
|
|
|
{
|
2012-08-15 15:52:27 +00:00
|
|
|
"Defect Type", "mpls_y1711.defect_type", FT_UINT16,
|
2012-03-11 19:05:32 +00:00
|
|
|
BASE_HEX, VALS(y1711_defect_type_vals), 0x0, NULL, HFILL
|
|
|
|
}
|
|
|
|
},
|
|
|
|
{
|
|
|
|
&hf_mpls_y1711_defect_location,
|
|
|
|
{
|
2012-08-15 15:52:27 +00:00
|
|
|
"Defect Location (AS)", "mpls_y1711.defect_location",
|
2012-03-11 19:05:32 +00:00
|
|
|
FT_UINT32, BASE_DEC, NULL, 0x0, "Defect Location", HFILL
|
|
|
|
}
|
|
|
|
},
|
|
|
|
{
|
|
|
|
&hf_mpls_y1711_bip16,
|
|
|
|
{
|
2012-08-15 15:52:27 +00:00
|
|
|
"BIP16", "mpls_y1711.bip16", FT_UINT16,
|
2012-03-11 19:05:32 +00:00
|
|
|
BASE_HEX, NULL, 0x0, NULL, HFILL
|
|
|
|
}
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
|
|
|
static gint *ett[] = {
|
|
|
|
&ett_mpls_y1711
|
|
|
|
};
|
|
|
|
|
|
|
|
proto_mpls_y1711 =
|
|
|
|
proto_register_protocol("MPLS ITU-T Y.1711 OAM",
|
|
|
|
"MPLS ITU-T Y.1711 OAM",
|
2012-08-15 15:52:27 +00:00
|
|
|
"mpls_y1711");
|
2012-03-11 19:05:32 +00:00
|
|
|
proto_register_field_array(proto_mpls_y1711, hf, array_length(hf));
|
|
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
new_register_dissector("mpls_y1711", dissect_mpls_y1711, proto_mpls_y1711);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
proto_reg_handoff_mpls_y1711(void)
|
|
|
|
{
|
|
|
|
mpls_y1711_handle = find_dissector("mpls_y1711");
|
2012-03-21 18:20:44 +00:00
|
|
|
dissector_add_uint("mpls.label",
|
2012-09-28 19:50:49 +00:00
|
|
|
MPLS_LABEL_OAM_ALERT /* 14 */,
|
2012-03-11 19:05:32 +00:00
|
|
|
mpls_y1711_handle);
|
2012-07-29 19:47:50 +00:00
|
|
|
|
|
|
|
data_handle = find_dissector("data");
|
2012-03-11 19:05:32 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
|
|
*
|
|
|
|
* Local variables:
|
|
|
|
* c-basic-offset: 4
|
2012-03-21 18:20:44 +00:00
|
|
|
* tab-width: 8
|
2012-03-11 19:05:32 +00:00
|
|
|
* indent-tabs-mode: nil
|
|
|
|
* End:
|
|
|
|
*
|
2012-03-21 18:20:44 +00:00
|
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
2012-03-11 19:05:32 +00:00
|
|
|
*/
|