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