/* packet-macmgmt.c
* Routines for docsis Mac Management Header dissection
* Copyright 2002, Anand V. Narwani <anand[AT]narwani.org>
*
* $Id: packet-macmgmt.c 23088 2007-10-07 23:46:44Z richardv $
*
* 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 "moduleinfo.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <glib.h>
#include <epan/packet.h>
#define MGT_SYNC 1
#define MGT_UCD 2
#define MGT_MAP 3
#define MGT_RNG_REQ 4
#define MGT_RNG_RSP 5
#define MGT_REG_REQ 6
#define MGT_REG_RSP 7
#define MGT_UCC_REQ 8
#define MGT_UCC_RSP 9
#define MGT_TRI_TCD 10
#define MGT_TRI_TSI 11
#define MGT_BPKM_REQ 12
#define MGT_BPKM_RSP 13
#define MGT_REG_ACK 14
#define MGT_DSA_REQ 15
#define MGT_DSA_RSP 16
#define MGT_DSA_ACK 17
#define MGT_DSC_REQ 18
#define MGT_DSC_RSP 19
#define MGT_DSC_ACK 20
#define MGT_DSD_REQ 21
#define MGT_DSD_RSP 22
#define MGT_DCC_REQ 23
#define MGT_DCC_RSP 24
#define MGT_DCC_ACK 25
#define MGT_DCI_REQ 26
#define MGT_DCI_RSP 27
#define MGT_UP_DIS 28
#define MGT_TYPE29UCD 29
/* Initialize the protocol and registered fields */
static int proto_docsis_mgmt = -1;
static int hf_docsis_mgt_hdr = -1;
static int hf_docsis_mgt_dst_addr = -1;
static int hf_docsis_mgt_src_addr = -1;
static int hf_docsis_mgt_msg_len = -1;
static int hf_docsis_mgt_dsap = -1;
static int hf_docsis_mgt_ssap = -1;
static int hf_docsis_mgt_control = -1;
static int hf_docsis_mgt_version = -1;
static int hf_docsis_mgt_type = -1;
static int hf_docsis_mgt_rsvd = -1;
static dissector_table_t docsis_mgmt_dissector_table;
static dissector_handle_t data_handle;
/* Initialize the subtree pointers */
static gint ett_docsis_mgmt = -1;
static gint ett_mgmt_pay = -1;
static const value_string mgmt_type_vals[] = {
{MGT_SYNC, "Timing Synchronisation"},
{MGT_UCD, "Upstream Channel Descriptor"},
{MGT_TYPE29UCD, "Upstream Channel Descriptor Type 29"},
{MGT_MAP, "Upstream Bandwidth Allocation"},
{MGT_RNG_REQ, "Ranging Request"},
{MGT_RNG_RSP, "Ranging Response"},
{MGT_REG_REQ, "Registration Request"},
{MGT_REG_RSP, "Registration Response"},
{MGT_UCC_REQ, "Upstream Channel Change Request"},
{MGT_UCC_RSP, "Upstream Channel Change Response"},
{MGT_TRI_TCD, "Telephony Channel Descriptor"},
{MGT_TRI_TSI, "Termination System Information"},
{MGT_BPKM_REQ, "Privacy Key Management Request"},
{MGT_BPKM_RSP, "Privacy Key Management Response"},
{MGT_REG_ACK, "Registration Acknowledge"},
{MGT_DSA_REQ, "Dynamic Service Addition Request"},
{MGT_DSA_RSP, "Dynamic Service Addition Response"},
{MGT_DSA_ACK, "Dynamic Service Addition Acknowledge"},
{MGT_DSC_REQ, "Dynamic Service Change Request"},
{MGT_DSC_RSP, "Dynamic Service Change Response"},
{MGT_DSC_ACK, "Dynamic Service Change Acknowledge"},
{MGT_DSD_REQ, "Dynamic Service Delete Request"},
{MGT_DSD_RSP, "Dynamic Service Delete Response"},
{MGT_DCC_REQ, "Dynamic Channel Change Request"},
{MGT_DCC_RSP, "Dynamic Channel Change Response"},
{MGT_DCC_ACK, "Dynamic Channel Change Acknowledge"},
{MGT_DCI_REQ, "Device Class Identification Request"},
{MGT_DCI_RSP, "Device Class Identification Response"},
{MGT_UP_DIS, "Upstream Channel Disable"},
{0, NULL}
};
/* Code to actually dissect the packets */
static void
dissect_macmgmt (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
{
const guint8 *src, *dst;
guint16 msg_len;
proto_item *mgt_hdr_it;
proto_tree *mgt_hdr_tree;
tvbuff_t *payload_tvb;
guint8 type;
if (check_col (pinfo->cinfo, COL_PROTOCOL))
col_set_str (pinfo->cinfo, COL_PROTOCOL, "DOCSIS MGMT");
if (check_col (pinfo->cinfo, COL_INFO))
col_clear (pinfo->cinfo, COL_INFO);
src = tvb_get_ptr (tvb, 6, 6);
dst = tvb_get_ptr (tvb, 0, 6);
SET_ADDRESS (&pinfo->dl_src, AT_ETHER, 6, src);
SET_ADDRESS (&pinfo->src, AT_ETHER, 6, src);
SET_ADDRESS (&pinfo->dl_dst, AT_ETHER, 6, dst);
SET_ADDRESS (&pinfo->dst, AT_ETHER, 6, dst);
if (tree)
{
mgt_hdr_it =
proto_tree_add_protocol_format (tree, proto_docsis_mgmt, tvb, 0, 20,
"Mac Management");
mgt_hdr_tree = proto_item_add_subtree (mgt_hdr_it, ett_docsis_mgmt);
proto_tree_add_item (mgt_hdr_tree, hf_docsis_mgt_dst_addr, tvb, 0, 6,
FALSE);
proto_tree_add_item (mgt_hdr_tree, hf_docsis_mgt_src_addr, tvb, 6, 6,
FALSE);
proto_tree_add_item (mgt_hdr_tree, hf_docsis_mgt_msg_len, tvb, 12, 2,
FALSE);
proto_tree_add_item (mgt_hdr_tree, hf_docsis_mgt_dsap, tvb, 14, 1,
FALSE);
proto_tree_add_item (mgt_hdr_tree, hf_docsis_mgt_ssap, tvb, 15, 1,
FALSE);
proto_tree_add_item (mgt_hdr_tree, hf_docsis_mgt_control, tvb, 16, 1,
FALSE);
proto_tree_add_item (mgt_hdr_tree, hf_docsis_mgt_version, tvb, 17, 1,
FALSE);
proto_tree_add_item (mgt_hdr_tree, hf_docsis_mgt_type, tvb, 18, 1,
FALSE);
proto_tree_add_item (mgt_hdr_tree, hf_docsis_mgt_rsvd, tvb, 19, 1,
FALSE);
}
/* Code to Call subdissector */
/* sub-dissectors are based on the type field */
type = tvb_get_guint8 (tvb, 18);
msg_len = tvb_get_ntohs (tvb, 12);
payload_tvb = tvb_new_subset (tvb, 20, msg_len - 6, msg_len - 6);
if (dissector_try_port
(docsis_mgmt_dissector_table, type, payload_tvb, pinfo, tree))
return;
else
call_dissector (data_handle, payload_tvb, pinfo, tree);
}
/* Register the protocol with Wireshark */
/* this format is require because a script is used to build the C function
that calls all the protocol registration.
*/
void
proto_register_docsis_mgmt (void)
{
/* Setup list of header fields See Section 1.6.1 for details*/
static hf_register_info hf[] = {
{&hf_docsis_mgt_hdr,
{"Mac Management Header", "docsis_mgmt",
FT_BYTES, BASE_HEX, NULL, 0x0,
"Mac Management Header", HFILL}
},
{&hf_docsis_mgt_dst_addr,
{"Destination Address", "docsis_mgmt.dst",
FT_ETHER, BASE_HEX, NULL, 0x0,
"Destination Address", HFILL}
},
{&hf_docsis_mgt_src_addr,
{"Source Address", "docsis_mgmt.src",
FT_ETHER, BASE_HEX, NULL, 0x0,
"Source Address", HFILL}
},
{&hf_docsis_mgt_msg_len,
{"Message Length - DSAP to End (Bytes)", "docsis_mgmt.msglen",
FT_UINT16, BASE_DEC, NULL, 0x0,
"Message Length", HFILL}
},
{&hf_docsis_mgt_dsap,
{"DSAP [0x00]", "docsis_mgmt.dsap",
FT_UINT8, BASE_HEX, NULL, 0x0,
"Destination SAP", HFILL}
},
{&hf_docsis_mgt_ssap,
{"SSAP [0x00]", "docsis_mgmt.ssap",
FT_UINT8, BASE_HEX, NULL, 0x0,
"Source SAP", HFILL}
},
{&hf_docsis_mgt_control,
{"Control [0x03]", "docsis_mgmt.control",
FT_UINT8, BASE_HEX, NULL, 0x0,
"Control", HFILL}
},
{&hf_docsis_mgt_version,
{"Version", "docsis_mgmt.version",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Version", HFILL}
},
{&hf_docsis_mgt_type,
{"Type", "docsis_mgmt.type",
FT_UINT8, BASE_DEC, VALS (mgmt_type_vals), 0x0,
"Type", HFILL}
},
{&hf_docsis_mgt_rsvd,
{"Reserved [0x00]", "docsis_mgmt.rsvd",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Reserved", HFILL}
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_docsis_mgmt,
&ett_mgmt_pay,
};
docsis_mgmt_dissector_table = register_dissector_table ("docsis_mgmt",
"DOCSIS Mac Management",
FT_UINT8, BASE_DEC);
/* Register the protocol name and description */
proto_docsis_mgmt = proto_register_protocol ("DOCSIS Mac Management",
"DOCSIS MAC MGMT",
"docsis_mgmt");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array (proto_docsis_mgmt, hf, array_length (hf));
proto_register_subtree_array (ett, array_length (ett));
register_dissector ("docsis_mgmt", dissect_macmgmt, proto_docsis_mgmt);
}
/* If this dissector uses sub-dissector registration add a registration routine.
This format is required because a script is used to find these routines and
create the code that calls these routines.
*/
void
proto_reg_handoff_docsis_mgmt (void)
{
dissector_handle_t docsis_mgmt_handle;
docsis_mgmt_handle = find_dissector ("docsis_mgmt");
data_handle = find_dissector ("data");
dissector_add ("docsis", 0x03, docsis_mgmt_handle);
}
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