forked from osmocom/wireshark
489 lines
16 KiB
C
489 lines
16 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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* 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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#include "config.h"
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#include <epan/packet.h>
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#include <epan/prefs.h>
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void proto_register_itdm(void);
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void proto_reg_handoff_itdm(void);
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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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/* I-TDM control protocol fields */
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static int hf_itdm_ctl_transid = -1;
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static int hf_itdm_ctl_command = -1;
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static int hf_itdm_ctl_flowid = -1;
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static int hf_itdm_ctl_dm = -1;
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static int hf_itdm_ctl_emts = -1;
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static int hf_itdm_ctl_pktrate = -1;
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static int hf_itdm_ctl_ptid = -1;
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static int hf_itdm_ctl_cksum = -1;
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/* Initialize the subtree pointers */
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static gint ett_itdm = -1;
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static gint ett_itdm_ctl = -1;
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/* ZZZZ some magic number.. */
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static guint gbl_ItdmMPLSLabel = 0x99887;
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static guint gbl_ItdmCTLFlowNo = 0;
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/* I-TDM 125usec mode commands for data flows */
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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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/* I-TDM commands for I-TDM control flows */
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#define ITDM_CTL_TRANSID_OFFSET 10
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#define ITDM_CTL_CMD_OFFSET 14
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#define ITDM_CTL_FLOWID_OFFSET 15
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#define ITDM_CTL_ITDM_MODE_OFFSET 18
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#define ITDM_CTL_EMTS_OFFSET 20
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#define ITDM_CTL_PKTRATE_OFFSET 22
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#define ITDM_CTL_PAIRED_TRANSID_OFFSET 26
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#define ITDM_CTL_CRC_OFFSET 30
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#define ITDM_CTL_CMD_AFI_REQ 1
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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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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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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 const value_string itdm_ctl_command_vals[] = {
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{ 0x0, "Not Used" },
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{ 0x1, "AFI_REQ: Alloc Flow ID Req" },
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{ 0x2, "AFI_RSP: Alloc Flow ID Rsp - Req Accepted." },
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{ 0x3, "DFI_REQ: Dealloc Flow ID Req" },
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{ 0x4, "DFI_RSP: Dealloc Flow ID Rsp - Req Accepted." },
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{ 0x10, "AFI_RSP: Reject: Data Mode Field value Not Supported." },
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{ 0x11, "AFI_RSP: Reject: Explicit Multi-timeslot value Not Supported." },
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{ 0x12, "AFI_RSP: Reject: Packet Rate value Not Supported." },
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{ 0x13, "AFI_RSP: Reject: Checksum Invalid." },
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{ 0x14, "AFI_RSP: Reject: No more flows available." },
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{ 0x20, "DFI_RSP: Reject: Data Mode Field value does not match Flow ID." },
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{ 0x21, "DFI_RSP: Reject: Explicit Multi-timeslots value does not match." },
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{ 0x22, "DFI_RSP: Reject: Packet Rate value does not match." },
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{ 0x23, "DFI_RSP: Reject: Checksum Invalid." },
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{ 0x24, "DFI_RSP: Reject: Flow ID invalid (out of range)." },
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{ 0x25, "DFI_RSP: Reject: Flow ID not currently allocated." },
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{ 0x26, "DFI_RSP: Reject: Other Flow ID in pair has active connections." },
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{ 0, NULL }
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};
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static const value_string itdm_ctl_data_mode_vals[] = {
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{ 0, "Not Used." },
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{ 1, "I-TDM 1ms Data Mode." },
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{ 2, "I-TDM 125usec Data Mode." },
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{ 3, "I-TDM Explicit Multi-timeslot Data Mode." },
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{ 4, "I-TDM CAS Signaling Data Mode." },
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{ 0, NULL }
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};
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static const value_string itdm_ctl_pktrate_vals[] = {
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{ 0x447A0000, "I-TDM 1ms Data Mode." },
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{ 0x45FA0000, "I-TDM 125usec/EMTS Data Mode." },
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{ 0x43A6AAAB, "I-TDM T1 CAS Mode." },
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{ 0x43FA0000, "I-TDM E1 CAS Mode." },
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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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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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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_const(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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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, ENC_NA);
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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, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_item(itdm_tree, hf_itdm_seqnum, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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proto_tree_add_item(itdm_tree, hf_itdm_sop_eop, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(itdm_tree, hf_itdm_last_pack, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(itdm_tree, hf_itdm_pktlen, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_checksum(itdm_tree, tvb, offset, hf_itdm_chksum, -1, NULL, pinfo, 0, ENC_BIG_ENDIAN, PROTO_CHECKSUM_NO_FLAGS);
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offset += 2;
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proto_tree_add_item(itdm_tree, hf_itdm_uid, tvb, offset, 3, ENC_BIG_ENDIAN);
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offset += 3;
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proto_tree_add_item(itdm_tree, hf_itdm_ack, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(itdm_tree, hf_itdm_act, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(itdm_tree, hf_itdm_chcmd, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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proto_tree_add_item(itdm_tree, hf_itdm_chid, tvb, offset, 3, ENC_BIG_ENDIAN);
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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, ENC_BIG_ENDIAN);
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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, ENC_BIG_ENDIAN);
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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, ENC_BIG_ENDIAN);
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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, ENC_BIG_ENDIAN);
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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_remaining(tvb, offset);
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call_data_dissector(next_tvb, pinfo, tree);
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}
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static void
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dissect_itdm_control(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_ctl_item = NULL;
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proto_tree *itdm_ctl_tree = NULL;
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int offset;
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guint32 flowid;
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guint8 command;
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guint32 trans_id;
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guint32 paired_trans_id;
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guint32 allocd_flowid;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "ITDM-Control");
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flowid = tvb_get_ntoh24(tvb, ITDM_FLOWID_OFFSET);
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command = tvb_get_guint8(tvb, ITDM_CTL_CMD_OFFSET);
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allocd_flowid = tvb_get_ntoh24(tvb, ITDM_CTL_FLOWID_OFFSET);
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trans_id = tvb_get_ntohl(tvb, ITDM_CTL_TRANSID_OFFSET);
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paired_trans_id = tvb_get_ntohl(tvb, ITDM_CTL_PAIRED_TRANSID_OFFSET);
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col_add_fstr(pinfo->cinfo, COL_INFO,
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"Flow %d Command %s ",
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flowid, val_to_str_const(command, itdm_ctl_command_vals, "Reserved"));
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if (command != ITDM_CTL_CMD_AFI_REQ )
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{
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col_append_fstr(pinfo->cinfo, COL_INFO,
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" Alloc'd FlowID %d", allocd_flowid);
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}
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col_append_fstr(pinfo->cinfo, COL_INFO, " TransID 0x%x ", trans_id);
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if (command != ITDM_CTL_CMD_AFI_REQ )
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{
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col_append_fstr(pinfo->cinfo, COL_INFO,
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" Paired TransID 0x%x", paired_trans_id);
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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_ctl_item = proto_tree_add_item(tree, proto_itdm, tvb, 0, -1, ENC_NA);
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itdm_ctl_tree = proto_item_add_subtree(itdm_ctl_item, ett_itdm_ctl);
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/* These eventually should go into a SFP.0 dissector... */
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proto_tree_add_item(itdm_ctl_tree, hf_itdm_timestamp, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_item(itdm_ctl_tree, hf_itdm_seqnum, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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proto_tree_add_item(itdm_ctl_tree, hf_itdm_sop_eop, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(itdm_ctl_tree, hf_itdm_last_pack, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(itdm_ctl_tree, hf_itdm_pktlen, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_checksum(itdm_ctl_tree, tvb, offset, hf_itdm_chksum, -1, NULL, pinfo, 0, ENC_BIG_ENDIAN, PROTO_CHECKSUM_NO_FLAGS);
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offset += 2;
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proto_tree_add_item(itdm_ctl_tree, hf_itdm_uid, tvb, offset, 3, ENC_BIG_ENDIAN);
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offset += 3;
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proto_tree_add_item(itdm_ctl_tree, hf_itdm_ctl_transid, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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proto_tree_add_item(itdm_ctl_tree, hf_itdm_ctl_command, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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if (command != ITDM_CTL_CMD_AFI_REQ) {
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proto_tree_add_item(itdm_ctl_tree, hf_itdm_ctl_flowid, tvb, offset, 3, ENC_BIG_ENDIAN);
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}
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offset += 3;
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proto_tree_add_item(itdm_ctl_tree, hf_itdm_ctl_dm, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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/* rsvd.. */
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offset += 1;
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proto_tree_add_item(itdm_ctl_tree, hf_itdm_ctl_emts, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_item(itdm_ctl_tree, hf_itdm_ctl_pktrate, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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if (command != ITDM_CTL_CMD_AFI_REQ) {
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proto_tree_add_item(itdm_ctl_tree, hf_itdm_ctl_ptid, tvb, offset, 4, ENC_BIG_ENDIAN);
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}
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offset += 4;
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/* rsvd.. */
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offset += 2;
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proto_tree_add_item(itdm_ctl_tree, hf_itdm_ctl_cksum, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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}
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next_tvb = tvb_new_subset_remaining(tvb, offset);
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call_data_dissector(next_tvb, pinfo, tree);
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}
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static int
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dissect_itdm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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guint32 flowid;
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/* ZZZ for now, 125 usec mode and I-TDM control protocol
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* need to add 1ms mode */
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if (tvb_captured_length(tvb) < 18)
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return 0;
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/* See if this packet is a data flow or the I-TDM control flow. */
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flowid = tvb_get_ntoh24(tvb, ITDM_FLOWID_OFFSET);
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/* gbl_ItdmCTLFlowNo is the configurable flow number where
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* the control protocol resides... Usually 0.
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*/
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if (flowid == gbl_ItdmCTLFlowNo)
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dissect_itdm_control(tvb, pinfo, tree);
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else
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dissect_itdm_125usec(tvb, pinfo, tree);
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return tvb_captured_length(tvb);
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}
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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",
|
|
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 } },
|
|
|
|
{ &hf_itdm_ctl_transid, { "Transaction ID", "itdm.ctl_transid",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_itdm_ctl_command, { "Control Command", "itdm.ctl_cmd",
|
|
FT_UINT8, BASE_DEC, VALS(itdm_ctl_command_vals), 0x0, NULL, HFILL } },
|
|
{ &hf_itdm_ctl_flowid, { "Allocated Flow ID", "itdm.ctl_flowid",
|
|
FT_UINT24, BASE_DEC, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_itdm_ctl_dm, { "I-TDM Data Mode", "itdm.ctl_dm",
|
|
FT_UINT8, BASE_DEC, VALS(itdm_ctl_data_mode_vals), 0x0, NULL, HFILL } },
|
|
{ &hf_itdm_ctl_emts, { "I-TDM Explicit Multi-timeslot Size", "itdm.ctlemts",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_itdm_ctl_pktrate, { "I-TDM Packet Rate", "itdm.ctl_pktrate",
|
|
FT_UINT32, BASE_HEX, VALS(itdm_ctl_pktrate_vals), 0x0, NULL, HFILL } },
|
|
{ &hf_itdm_ctl_ptid, { "Paired Transaction ID", "itdm.ctl_ptid",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_itdm_ctl_cksum, { "ITDM Control Message Checksum", "itdm.ctl_cksum",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } }
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
&ett_itdm,
|
|
&ett_itdm_ctl
|
|
};
|
|
|
|
module_t *itdm_module;
|
|
|
|
proto_itdm = proto_register_protocol("Internal TDM", "ITDM", "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);
|
|
|
|
prefs_register_uint_preference(itdm_module, "ctl_flowno",
|
|
"I-TDM Control Protocol Flow Number",
|
|
"Flow Number used by I-TDM Control Protocol traffic.",
|
|
10, &gbl_ItdmCTLFlowNo);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_itdm(void)
|
|
{
|
|
static gboolean Initialized=FALSE;
|
|
static dissector_handle_t itdm_handle;
|
|
static guint ItdmMPLSLabel;
|
|
|
|
if (!Initialized) {
|
|
itdm_handle = create_dissector_handle( dissect_itdm, proto_itdm );
|
|
Initialized=TRUE;
|
|
} else {
|
|
dissector_delete_uint("mpls.label", ItdmMPLSLabel, itdm_handle);
|
|
}
|
|
|
|
ItdmMPLSLabel = gbl_ItdmMPLSLabel;
|
|
dissector_add_uint("mpls.label", gbl_ItdmMPLSLabel, itdm_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local Variables:
|
|
* c-basic-offset: 2
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* ex: set shiftwidth=2 tabstop=8 expandtab:
|
|
* :indentSize=2:tabSize=8:noTabs=true:
|
|
*/
|