diff options
Diffstat (limited to 'plugins/docsis/packet-dscack.c')
| -rw-r--r-- | plugins/docsis/packet-dscack.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/plugins/docsis/packet-dscack.c b/plugins/docsis/packet-dscack.c new file mode 100644 index 0000000000..de78704afd --- /dev/null +++ b/plugins/docsis/packet-dscack.c @@ -0,0 +1,173 @@ +/* packet-dscack.c + * Routines for Dynamic Service Change Acknowledge dissection + * Copyright 2002, Anand V. Narwani <anarwani@cisco.com> + * + * Ethereal - Network traffic analyzer + * By Gerald Combs <gerald@ethereal.com> + * 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 "plugins/plugin_api.h" +#include "plugins/plugin_api_defs.h" +#include "moduleinfo.h" + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#ifdef HAVE_SYS_TYPES_H +# include <sys/types.h> +#endif + +#ifdef HAVE_NETINET_IN_H +# include <netinet/in.h> +#endif + +#include <gmodule.h> + +#ifdef NEED_SNPRINTF_H +# include "snprintf.h" +#endif + +#include <epan/packet.h> + +/* Initialize the protocol and registered fields */ +static int proto_docsis_dscack = -1; +static int hf_docsis_dscack = -1; +static int hf_docsis_dscack_tranid = -1; +static int hf_docsis_dscack_response = -1; +static dissector_handle_t docsis_tlv_handle; + + +/* Initialize the subtree pointers */ +static gint ett_docsis_dscack = -1; + +extern value_string docsis_conf_code[]; + +/* Code to actually dissect the packets */ +static void +dissect_dscack (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree) +{ + + proto_item *it; + proto_tree *dscack_tree; + guint16 transid; + guint16 tlv_data_len; + guint8 response; + tvbuff_t *next_tvb; + + transid = tvb_get_ntohs (tvb, 0); + response = tvb_get_guint8 (tvb, 2); + tlv_data_len = tvb_length_remaining (tvb, 3); + + if (check_col (pinfo->cinfo, COL_INFO)) + { + col_clear (pinfo->cinfo, COL_INFO); + col_add_fstr (pinfo->cinfo, COL_INFO, + "Dynamic Service Change Ack ID = %u (%s)", transid, + val_to_str (response, docsis_conf_code, "%s")); + } + + if (tree) + { + it = + proto_tree_add_protocol_format (tree, proto_docsis_dscack, tvb, 0, + tvb_length_remaining (tvb, 0), + "DSC Acknowledge"); + dscack_tree = proto_item_add_subtree (it, ett_docsis_dscack); + proto_tree_add_item (dscack_tree, hf_docsis_dscack_tranid, tvb, 0, 2, + FALSE); + proto_tree_add_item (dscack_tree, hf_docsis_dscack_response, tvb, 2, 1, + FALSE); + /* Call Dissector for Appendix C TLV's */ + next_tvb = tvb_new_subset (tvb, 3, tlv_data_len, tlv_data_len); + call_dissector (docsis_tlv_handle, next_tvb, pinfo, dscack_tree); + } + + + +} + + + + +/* Register the protocol with Ethereal */ + +/* this format is require because a script is used to build the C function + that calls all the protocol registration. +*/ + + +void +proto_register_docsis_dscack (void) +{ + +/* Setup list of header fields See Section 1.6.1 for details*/ + static hf_register_info hf[] = { + {&hf_docsis_dscack, + {"Dynamic Service Change Ack", "docsis.dscack", + FT_BYTES, BASE_HEX, NULL, 0x0, + "Dynamic Service Add Request", HFILL} + }, + {&hf_docsis_dscack_tranid, + {"Transaction Id", "docsis.dscack.tranid", + FT_UINT16, BASE_DEC, NULL, 0x0, + "Service Identifier", HFILL} + }, + {&hf_docsis_dscack_response, + {"Confirmation Code", "docsis.dscack.confcode", + FT_UINT8, BASE_DEC, VALS (docsis_conf_code), 0x0, + "Confirmation Code", HFILL} + }, + }; + +/* Setup protocol subtree array */ + static gint *ett[] = { + &ett_docsis_dscack, + }; + +/* Register the protocol name and description */ + proto_docsis_dscack = + proto_register_protocol ("DOCSIS Dynamic Service Change Acknowledgement", + "DOCSIS DSC-ACK", "docsis_dscack"); + +/* Required function calls to register the header fields and subtrees used */ + proto_register_field_array (proto_docsis_dscack, hf, array_length (hf)); + proto_register_subtree_array (ett, array_length (ett)); + + register_dissector ("docsis_dscack", dissect_dscack, proto_docsis_dscack); +} + + +/* 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_dscack (void) +{ + dissector_handle_t docsis_dscack_handle; + + docsis_dscack_handle = find_dissector ("docsis_dscack"); + docsis_tlv_handle = find_dissector ("docsis_tlv"); + dissector_add ("docsis_mgmt", 0x14, docsis_dscack_handle); + +} |