138 lines
4.1 KiB
C
138 lines
4.1 KiB
C
/* packet-dsaack.c
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* Routines for Dynamic Service Addition Acknowledge dissection
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* Copyright 2002, Anand V. Narwani <anand[AT]narwani.org>
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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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void proto_register_docsis_dsaack(void);
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void proto_reg_handoff_docsis_dsaack(void);
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/* Initialize the protocol and registered fields */
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static int proto_docsis_dsaack = -1;
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static int hf_docsis_dsaack_tranid = -1;
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static int hf_docsis_dsaack_response = -1;
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static dissector_handle_t docsis_tlv_handle;
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/* Initialize the subtree pointers */
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static gint ett_docsis_dsaack = -1;
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extern value_string docsis_conf_code[];
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/* Code to actually dissect the packets */
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static void
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dissect_dsaack (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
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{
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proto_item *it;
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proto_tree *dsaack_tree = NULL;
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guint16 transid;
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guint8 response;
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tvbuff_t *next_tvb;
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transid = tvb_get_ntohs (tvb, 0);
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response = tvb_get_guint8 (tvb, 2);
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col_add_fstr (pinfo->cinfo, COL_INFO,
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"Dynamic Service Add Ack ID = %u (%s)", transid,
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val_to_str (response, docsis_conf_code, "%d"));
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if (tree)
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{
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it =
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proto_tree_add_protocol_format (tree, proto_docsis_dsaack, tvb, 0, -1,
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"DSA Acknowledge");
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dsaack_tree = proto_item_add_subtree (it, ett_docsis_dsaack);
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proto_tree_add_item (dsaack_tree, hf_docsis_dsaack_tranid, tvb, 0, 2,
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ENC_BIG_ENDIAN);
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proto_tree_add_item (dsaack_tree, hf_docsis_dsaack_response, tvb, 2, 1,
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ENC_BIG_ENDIAN);
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}
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/* Call Dissector for Appendix C TLV's */
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next_tvb = tvb_new_subset_remaining (tvb, 3);
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call_dissector (docsis_tlv_handle, next_tvb, pinfo, dsaack_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_dsaack (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_dsaack_tranid,
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{"Transaction Id", "docsis_dsaack.tranid",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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"Service Identifier", HFILL}
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},
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{&hf_docsis_dsaack_response,
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{"Confirmation Code", "docsis_dsaack.confcode",
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FT_UINT8, BASE_DEC, VALS (docsis_conf_code), 0x0,
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NULL, 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_dsaack,
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};
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/* Register the protocol name and description */
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proto_docsis_dsaack =
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proto_register_protocol ("DOCSIS Dynamic Service Addition Acknowledge",
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"DOCSIS DSA-ACK", "docsis_dsaack");
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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_dsaack, hf, array_length (hf));
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proto_register_subtree_array (ett, array_length (ett));
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register_dissector ("docsis_dsaack", dissect_dsaack, proto_docsis_dsaack);
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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_dsaack (void)
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{
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dissector_handle_t docsis_dsaack_handle;
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docsis_dsaack_handle = find_dissector ("docsis_dsaack");
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docsis_tlv_handle = find_dissector ("docsis_tlv");
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dissector_add_uint ("docsis_mgmt", 0x11, docsis_dsaack_handle);
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}
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