/* Copyright 2002, Anand V. Narwani * * $Id$ * * Wireshark - Network traffic analyzer * By Gerald Combs * 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 #define IUC_REQUEST 1 #define IUC_REQ_DATA 2 #define IUC_INIT_MAINT 3 #define IUC_STATION_MAINT 4 #define IUC_SHORT_DATA_GRANT 5 #define IUC_LONG_DATA_GRANT 6 #define IUC_NULL_IE 7 #define IUC_DATA_ACK 8 #define IUC_RESERVED9 9 #define IUC_RESERVED10 10 #define IUC_RESERVED11 11 #define IUC_RESERVED12 12 #define IUC_RESERVED13 13 #define IUC_RESERVED14 14 #define IUC_EXPANSION 15 /* Initialize the protocol and registered fields */ static int proto_docsis_map = -1; static int hf_docsis_map_upstream_chid = -1; static int hf_docsis_map_ucd_count = -1; static int hf_docsis_map_numie = -1; static int hf_docsis_map_alloc_start = -1; static int hf_docsis_map_ack_time = -1; static int hf_docsis_map_rng_start = -1; static int hf_docsis_map_rng_end = -1; static int hf_docsis_map_data_start = -1; static int hf_docsis_map_data_end = -1; static int hf_docsis_map_ie = -1; static int hf_docsis_map_rsvd = -1; static int hf_docsis_map_sid = -1; static int hf_docsis_map_iuc = -1; static int hf_docsis_map_offset = -1; /* Initialize the subtree pointers */ static gint ett_docsis_map = -1; /* Defined in packet-ucd.c */ extern value_string iuc_vals[]; /* Code to actually dissect the packets */ static void dissect_map (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree) { guint8 i, numie; int pos; guint16 sid; guint8 iuc; guint16 offset; guint32 ie, temp, mask; proto_item *it, *item; proto_tree *map_tree; guint8 upchid, ucd_count; numie = tvb_get_guint8 (tvb, 2); upchid = tvb_get_guint8 (tvb, 0); ucd_count = tvb_get_guint8 (tvb, 1); col_clear (pinfo->cinfo, COL_INFO); if (upchid > 0) col_add_fstr (pinfo->cinfo, COL_INFO, "Map Message: Channel ID = %u (U%u), UCD Count = %u, # IE's = %u", upchid, upchid - 1, ucd_count, numie); else col_add_fstr (pinfo->cinfo, COL_INFO, "Map Message: Channel ID = %u (Telephony Return), UCD Count = %u, # IE's = %u", upchid, ucd_count, numie); if (tree) { it = proto_tree_add_protocol_format (tree, proto_docsis_map, tvb, 0, -1, "MAP Message"); map_tree = proto_item_add_subtree (it, ett_docsis_map); proto_tree_add_item (map_tree, hf_docsis_map_upstream_chid, tvb, 0, 1, ENC_BIG_ENDIAN); proto_tree_add_item (map_tree, hf_docsis_map_ucd_count, tvb, 1, 1, ENC_BIG_ENDIAN); proto_tree_add_item (map_tree, hf_docsis_map_numie, tvb, 2, 1, ENC_BIG_ENDIAN); proto_tree_add_item (map_tree, hf_docsis_map_rsvd, tvb, 3, 1, ENC_BIG_ENDIAN); proto_tree_add_item (map_tree, hf_docsis_map_alloc_start, tvb, 4, 4, ENC_BIG_ENDIAN); proto_tree_add_item (map_tree, hf_docsis_map_ack_time, tvb, 8, 4, ENC_BIG_ENDIAN); proto_tree_add_item (map_tree, hf_docsis_map_rng_start, tvb, 12, 1, ENC_BIG_ENDIAN); proto_tree_add_item (map_tree, hf_docsis_map_rng_end, tvb, 13, 1, ENC_BIG_ENDIAN); proto_tree_add_item (map_tree, hf_docsis_map_data_start, tvb, 14, 1, ENC_BIG_ENDIAN); proto_tree_add_item (map_tree, hf_docsis_map_data_end, tvb, 15, 1, ENC_BIG_ENDIAN); pos = 16; for (i = 0; i < numie; i++) { ie = tvb_get_ntohl (tvb, pos); mask = 0xFFFC0000; temp = (ie & mask); temp = temp >> 18; sid = (guint16) (temp & 0x3FFF); mask = 0x3C000; temp = (ie & mask); temp = temp >> 14; iuc = (guint8) (temp & 0x0F); mask = 0x3FFF; offset = (guint16) (ie & mask); item = proto_tree_add_item(map_tree, hf_docsis_map_sid, tvb, pos, 4, ENC_BIG_ENDIAN); PROTO_ITEM_SET_HIDDEN(item); item = proto_tree_add_item(map_tree, hf_docsis_map_iuc, tvb, pos, 4, ENC_BIG_ENDIAN); PROTO_ITEM_SET_HIDDEN(item); item = proto_tree_add_item(map_tree, hf_docsis_map_offset, tvb, pos, 4, ENC_BIG_ENDIAN); PROTO_ITEM_SET_HIDDEN(item); if (sid == 0x3FFF) proto_tree_add_uint_format (map_tree, hf_docsis_map_ie, tvb, pos, 4, ie, "SID = 0x%x (All CM's), IUC = %s, Offset = %u", sid, val_to_str (iuc, iuc_vals, "%d"), offset); else proto_tree_add_uint_format (map_tree, hf_docsis_map_ie, tvb, pos, 4, ie, "SID = %u, IUC = %s, Offset = %u", sid, val_to_str (iuc, iuc_vals, "%d"), offset); pos = pos + 4; } /* for... */ } /* if(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_map (void) { /* Setup list of header fields See Section 1.6.1 for details*/ static hf_register_info hf[] = { {&hf_docsis_map_ucd_count, {"UCD Count", "docsis_map.ucdcount", FT_UINT8, BASE_DEC, NULL, 0x0, "Map UCD Count", HFILL} }, {&hf_docsis_map_upstream_chid, {"Upstream Channel ID", "docsis_map.upchid", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL} }, {&hf_docsis_map_numie, {"Number of IE's", "docsis_map.numie", FT_UINT8, BASE_DEC, NULL, 0x0, "Number of Information Elements", HFILL} }, {&hf_docsis_map_alloc_start, {"Alloc Start Time (minislots)", "docsis_map.allocstart", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL} }, {&hf_docsis_map_ack_time, {"ACK Time (minislots)", "docsis_map.acktime", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL} }, {&hf_docsis_map_rng_start, {"Ranging Backoff Start", "docsis_map.rng_start", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL} }, {&hf_docsis_map_rng_end, {"Ranging Backoff End", "docsis_map.rng_end", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL} }, {&hf_docsis_map_data_start, {"Data Backoff Start", "docsis_map.data_start", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL} }, {&hf_docsis_map_data_end, {"Data Backoff End", "docsis_map.data_end", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL} }, {&hf_docsis_map_ie, {"Information Element", "docsis_map.ie", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL} }, {&hf_docsis_map_rsvd, {"Reserved [0x00]", "docsis_map.rsvd", FT_UINT8, BASE_HEX, NULL, 0x0, "Reserved Byte", HFILL} }, {&hf_docsis_map_sid, {"Service Identifier", "docsis_map.sid", FT_UINT32, BASE_DEC, NULL, 0xFFFC0000, NULL, HFILL} }, {&hf_docsis_map_iuc, {"Interval Usage Code", "docsis_map.iuc", FT_UINT32, BASE_DEC, VALS(iuc_vals), 0x0003c000, NULL, HFILL} }, {&hf_docsis_map_offset, {"Offset", "docsis_map.offset", FT_UINT32, BASE_DEC, NULL, 0x00003fff, NULL, HFILL} }, }; /* Setup protocol subtree array */ static gint *ett[] = { &ett_docsis_map, }; /* Register the protocol name and description */ proto_docsis_map = proto_register_protocol ("DOCSIS Upstream Bandwidth Allocation", "DOCSIS MAP", "docsis_map"); /* Required function calls to register the header fields and subtrees used */ proto_register_field_array (proto_docsis_map, hf, array_length (hf)); proto_register_subtree_array (ett, array_length (ett)); register_dissector ("docsis_map", dissect_map, proto_docsis_map); } /* 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_map (void) { dissector_handle_t docsis_map_handle; docsis_map_handle = find_dissector ("docsis_map"); dissector_add_uint ("docsis_mgmt", 0x03, docsis_map_handle); }