302 lines
9 KiB
C
302 lines
9 KiB
C
/* packet-itdm.c
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* Routines for I-TDM (Internal TDM) dissection
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* Compliant to PICMG SFP.0 and SFP.1 March 24, 2005
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*
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* Copyright 2008, Dan Gora <dg [AT] adax.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., 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 "epan/prefs.h"
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/* Initialize the protocol and registered fields */
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static int proto_itdm = -1;
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static int hf_itdm_timestamp = -1;
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static int hf_itdm_seqnum = -1;
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static int hf_itdm_sop_eop = -1;
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static int hf_itdm_last_pack = -1;
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static int hf_itdm_pktlen = -1;
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static int hf_itdm_chksum = -1;
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static int hf_itdm_uid = -1;
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static int hf_itdm_ack = -1;
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static int hf_itdm_act = -1;
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static int hf_itdm_chcmd = -1;
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static int hf_itdm_chid = -1;
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static int hf_itdm_chloc1 = -1;
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static int hf_itdm_chloc2 = -1;
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static int hf_itdm_pktrate = -1;
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static int hf_itdm_cxnsize = -1;
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/* Initialize the subtree pointers */
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static gint ett_itdm = -1;
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/* ZZZZ some magic number.. */
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static guint gbl_ItdmMPLSLabel = 0x99887;
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static dissector_handle_t data_handle;
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#define ITDM_CMD_NEW_CHAN 1
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#define ITDM_CMD_CLOSE_CHAN 2
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#define ITDM_CMD_RELOC_CHAN 3
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#define ITDM_CMD_CYCLIC_REAF 4
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#define ITDM_CMD_PACKET_RATE 5
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#define ITDM_FLOWID_OFFSET 7
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#define ITDM_CHCMD_OFFSET 10
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#define ITDM_CHANID_OFFSET 11
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#define ITDM_CHLOC1_OFFSET 14
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#define ITDM_CHLOC2_OFFSET 16
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static const value_string sop_eop_vals[] = {
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{ 0x0, "Middle of Packet" },
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{ 0x1, "End of Packet" },
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{ 0x2, "Start of Packet" },
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{ 0x3, "Complete Packet" },
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{ 0, NULL }
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};
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#if 0
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static const value_string ack_vals[] = {
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{ 0x0, "Normal Command" },
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{ 0x1, "Acknowledging a command from remote node" },
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{ 0, NULL }
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};
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#else
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static const true_false_string ack_tfs = {
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"Acknowledging a command from remote node",
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"Normal Command"
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};
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#endif
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static const value_string chcmd_vals[] = {
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{ 0x0, "Reserved" },
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{ 0x1, "New Channel ID" },
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{ 0x2, "Close Channel ID" },
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{ 0x3, "Relocate Channel ID" },
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{ 0x4, "Cyclic Reaffirmation" },
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{ 0x5, "Packet Rate Integrity Check" },
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{ 0x6, "Reserved" },
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{ 0x7, "Reserved" },
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{ 0x8, "Reserved" },
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{ 0x9, "Reserved" },
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{ 0xa, "Reserved" },
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{ 0xb, "Reserved" },
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{ 0xc, "Reserved" },
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{ 0xd, "Reserved" },
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{ 0xe, "Reserved" },
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{ 0xf, "Reserved" },
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{ 0, NULL }
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};
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static void
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dissect_itdm_125usec(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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tvbuff_t *next_tvb;
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proto_item *itdm_item = NULL;
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proto_tree *itdm_tree = NULL;
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int offset;
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guint32 flowid;
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guint32 chanid;
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guint16 chloc1;
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guint16 chloc2;
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guint8 chcmd;
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guint8 actbit;
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guint8 ackbit;
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "ITDM");
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flowid = tvb_get_ntoh24(tvb, ITDM_FLOWID_OFFSET);
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chanid = tvb_get_ntoh24(tvb, ITDM_CHANID_OFFSET);
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chcmd = tvb_get_guint8(tvb, ITDM_CHCMD_OFFSET);
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chloc1 = tvb_get_ntohs(tvb, ITDM_CHLOC1_OFFSET);
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actbit = (chcmd & 0x10) ? 1 : 0;
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ackbit = (chcmd & 0x20) ? 1 : 0;
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chcmd = chcmd & 0x0f;
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if (check_col(pinfo->cinfo, COL_INFO))
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{
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col_add_fstr(pinfo->cinfo, COL_INFO,
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"Flow %d Chan %d ACT %d ACK %d %s",
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flowid, chanid, actbit, ackbit,
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val_to_str(chcmd, chcmd_vals, "Reserved"));
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if (chcmd == ITDM_CMD_NEW_CHAN ||
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chcmd == ITDM_CMD_CLOSE_CHAN ||
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chcmd == ITDM_CMD_CYCLIC_REAF)
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{
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col_append_fstr(pinfo->cinfo, COL_INFO,
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" Loc1 %d", chloc1);
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}
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else if (chcmd == ITDM_CMD_RELOC_CHAN)
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{
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chloc2 = tvb_get_ntohs(tvb, ITDM_CHLOC2_OFFSET);
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col_append_fstr(pinfo->cinfo, COL_INFO,
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" Loc1 %d Loc2 %d", chloc1, chloc2);
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}
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}
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offset = 0;
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if (tree)
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{
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itdm_item = proto_tree_add_item(tree, proto_itdm, tvb, 0, -1, FALSE);
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itdm_tree = proto_item_add_subtree(itdm_item, ett_itdm);
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proto_tree_add_item(itdm_tree, hf_itdm_timestamp, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(itdm_tree, hf_itdm_seqnum, tvb, offset, 1, FALSE);
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offset += 1;
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proto_tree_add_item(itdm_tree, hf_itdm_sop_eop, tvb, offset, 1, FALSE);
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proto_tree_add_item(itdm_tree, hf_itdm_last_pack, tvb, offset, 1, FALSE);
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proto_tree_add_item(itdm_tree, hf_itdm_pktlen, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(itdm_tree, hf_itdm_chksum, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(itdm_tree, hf_itdm_uid, tvb, offset, 3, FALSE);
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offset += 3;
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proto_tree_add_item(itdm_tree, hf_itdm_ack, tvb, offset, 1, FALSE);
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proto_tree_add_item(itdm_tree, hf_itdm_act, tvb, offset, 1, FALSE);
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proto_tree_add_item(itdm_tree, hf_itdm_chcmd, tvb, offset, 1, FALSE);
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offset += 1;
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proto_tree_add_item(itdm_tree, hf_itdm_chid, tvb, offset, 3, FALSE);
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offset += 3;
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if (chcmd == ITDM_CMD_PACKET_RATE)
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{
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proto_tree_add_item(itdm_tree, hf_itdm_pktrate, tvb, offset, 4, FALSE);
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offset += 4;
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}
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else
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{
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proto_tree_add_item(itdm_tree, hf_itdm_chloc1, tvb, offset, 2, FALSE);
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offset += 2;
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if (chcmd == ITDM_CMD_CYCLIC_REAF ||
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chcmd == ITDM_CMD_NEW_CHAN ||
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chcmd == ITDM_CMD_CLOSE_CHAN)
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{
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proto_tree_add_item(itdm_tree, hf_itdm_cxnsize, tvb, offset, 2, FALSE);
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offset += 2;
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}
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else
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{
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proto_tree_add_item(itdm_tree, hf_itdm_chloc2, tvb, offset, 2, FALSE);
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offset += 2;
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}
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}
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};
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next_tvb = tvb_new_subset(tvb, offset, -1 , -1);
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call_dissector(data_handle, next_tvb, pinfo, tree);
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}
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static void
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dissect_itdm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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/* ZZZ for now, always 125 usec mode */
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if (tvb_length(tvb) < 18)
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return;
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dissect_itdm_125usec(tvb, pinfo, tree);
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}
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void proto_reg_handoff_itdm(void);
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void
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proto_register_itdm(void)
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{
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static hf_register_info hf[] = {
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{ &hf_itdm_timestamp,{ "Timestamp", "itdm.timestamp",
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FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
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{ &hf_itdm_seqnum,{ "Sequence Number", "itdm.seqnum",
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FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
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{ &hf_itdm_sop_eop,{ "Start/End of Packet", "itdm.sop_eop",
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FT_UINT8, BASE_DEC, VALS(sop_eop_vals), 0xc0, NULL, HFILL } },
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{ &hf_itdm_last_pack,{ "Last Packet", "itdm.last_pack",
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FT_BOOLEAN, 8, TFS(&tfs_true_false), 0x20, NULL, HFILL } },
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{ &hf_itdm_pktlen,{ "Packet Length", "itdm.pktlen",
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FT_UINT16, BASE_DEC, NULL, 0x07ff, NULL, HFILL } },
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{ &hf_itdm_chksum,{ "Checksum", "itdm.chksum",
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FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
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{ &hf_itdm_uid,{ "Flow ID", "itdm.uid",
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FT_UINT24, BASE_DEC, NULL, 0x0, NULL, HFILL } },
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{ &hf_itdm_ack,{ "ACK", "itdm.ack",
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FT_BOOLEAN, 8, TFS(&ack_tfs), 0x20, NULL, HFILL } },
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{ &hf_itdm_act,{ "Activate", "itdm.act",
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FT_BOOLEAN, 8, TFS(&tfs_true_false), 0x10, NULL, HFILL } },
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{ &hf_itdm_chcmd,{ "Channel Command", "itdm.chcmd",
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FT_UINT8, BASE_DEC, VALS(chcmd_vals), 0x0f, NULL, HFILL } },
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{ &hf_itdm_chid,{ "Channel ID", "itdm.chid",
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FT_UINT24, BASE_DEC, NULL, 0x0, NULL, HFILL } },
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{ &hf_itdm_chloc1,{ "Channel Location 1", "itdm.chloc1",
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FT_UINT16, BASE_DEC, NULL, 0x1ff, NULL, HFILL } },
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{ &hf_itdm_chloc2,{ "Channel Location 2", "itdm.chloc2",
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FT_UINT16, BASE_DEC, NULL, 0x1ff, NULL, HFILL } },
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{ &hf_itdm_pktrate,{ "IEEE 754 Packet Rate", "itdm.pktrate",
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FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
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{ &hf_itdm_cxnsize, { "Connection Size", "itdm.cxnsize",
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FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }
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};
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static gint *ett[] = {
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&ett_itdm
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};
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module_t *itdm_module;
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proto_itdm = proto_register_protocol("Internal TDM", "ITDM", "itdm");
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register_dissector("itdm", dissect_itdm, proto_itdm);
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proto_register_field_array(proto_itdm, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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itdm_module = prefs_register_protocol(proto_itdm, proto_reg_handoff_itdm);
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prefs_register_uint_preference(itdm_module, "mpls_label",
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"ITDM MPLS label (Flow Bundle ID in hex)",
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"The MPLS label (aka Flow Bundle ID) used by ITDM traffic.",
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16, &gbl_ItdmMPLSLabel);
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}
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void
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proto_reg_handoff_itdm(void)
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{
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static gboolean Initialized=FALSE;
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static dissector_handle_t itdm_handle;
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static guint ItdmMPLSLabel;
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if (!Initialized) {
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itdm_handle = find_dissector("itdm");;
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data_handle = find_dissector("data");
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Initialized=TRUE;
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} else {
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dissector_delete("mpls.label", ItdmMPLSLabel, itdm_handle);
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}
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ItdmMPLSLabel = gbl_ItdmMPLSLabel;
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dissector_add("mpls.label", gbl_ItdmMPLSLabel, itdm_handle);
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}
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