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