diff options
Diffstat (limited to 'plugins/docsis/packet-dccreq.c')
| -rw-r--r-- | plugins/docsis/packet-dccreq.c | 620 |
1 files changed, 620 insertions, 0 deletions
diff --git a/plugins/docsis/packet-dccreq.c b/plugins/docsis/packet-dccreq.c new file mode 100644 index 0000000000..2b76da30da --- /dev/null +++ b/plugins/docsis/packet-dccreq.c @@ -0,0 +1,620 @@ +/* packet-dccreq.c + * Routines for DCC Request Message dissection + * Copyright 2004, Darryl Hymel <darryl.hymel[AT]arrisi.com> + * + * $Id$ + * + * 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 "moduleinfo.h" + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include <gmodule.h> + +#include <epan/packet.h> + +#define DCCREQ_UP_CHAN_ID 1 +#define DCCREQ_DS_PARAMS 2 +#define DCCREQ_INIT_TECH 3 +#define DCCREQ_UCD_SUB 4 +#define DCCREQ_SAID_SUB 6 +#define DCCREQ_SF_SUB 7 +#define DCCREQ_CMTS_MAC_ADDR 8 +#define DCCREQ_KEY_SEQ_NUM 31 +#define DCCREQ_HMAC_DIGEST 27 + +/* Define Downstrean Parameters subtypes + * These are subtype of DCCREQ_DS_PARAMS (2) + */ + +#define DCCREQ_DS_FREQ 1 +#define DCCREQ_DS_MOD_TYPE 2 +#define DCCREQ_DS_SYM_RATE 3 +#define DCCREQ_DS_INTLV_DEPTH 4 +#define DCCREQ_DS_CHAN_ID 5 +#define DCCREQ_DS_SYNC_SUB 6 + +/* Define Service Flow Substitution subtypes + * These are subtypes of DCCREQ_SF_SUB (7) + */ +#define DCCREQ_SF_SFID 1 +#define DCCREQ_SF_SID 2 +#define DCCREQ_SF_UNSOL_GRANT_TREF 5 + +/* Initialize the protocol and registered fields */ +static int proto_docsis_dccreq = -1; + +static int hf_docsis_dccreq_tran_id = -1; +static int hf_docsis_dccreq_up_chan_id = -1; +static int hf_docsis_dccreq_ds_freq = -1; +static int hf_docsis_dccreq_ds_mod_type = -1; +static int hf_docsis_dccreq_ds_sym_rate = -1; +static int hf_docsis_dccreq_ds_intlv_depth_i = -1; +static int hf_docsis_dccreq_ds_intlv_depth_j = -1; +static int hf_docsis_dccreq_ds_chan_id = -1; +static int hf_docsis_dccreq_ds_sync_sub = -1; +static int hf_docsis_dccreq_init_tech = -1; +static int hf_docsis_dccreq_ucd_sub = -1; +static int hf_docsis_dccreq_said_sub_cur = -1; +static int hf_docsis_dccreq_said_sub_new = -1; +static int hf_docsis_dccreq_sf_sfid_cur = -1; +static int hf_docsis_dccreq_sf_sfid_new = -1; +static int hf_docsis_dccreq_sf_sid_cur = -1; +static int hf_docsis_dccreq_sf_sid_new = -1; +static int hf_docsis_dccreq_sf_unsol_grant_tref = -1; +static int hf_docsis_dccreq_cmts_mac_addr = -1; +static int hf_docsis_dccreq_key_seq_num = -1; +static int hf_docsis_dccreq_hmac_digest = -1; + +/* Initialize the subtree pointers */ +static gint ett_docsis_dccreq = -1; +static gint ett_docsis_dccreq_ds_params = -1; +static gint ett_docsis_dccreq_sf_sub = -1; + + +value_string ds_mod_type_vals[] = { + {0 , "64 QAM"}, + {1 , "256 QAM"}, + {0, NULL} +}; + +value_string ds_sym_rate_vals[] = { + {0 , "5.056941 Msym/sec"}, + {1 , "5.360537 Msym/sec"}, + {2 , "6.952 Msym/sec"}, + {0, NULL} +}; +value_string init_tech_vals[] = { + {0 , "Reinitialize MAC"}, + {1 , "Broadcast Init RNG on new chanbefore normal op"}, + {2 , "Unicast RNG on new chan before normal op"}, + {3 , "Either Unicast or broadcast RNG on new chan before normal op"}, + {4 , "Use new chan directly without re-init or RNG"}, + {0, NULL} +}; +/* Code to actually dissect the packets */ +static void +dissect_dccreq_ds_params (tvbuff_t * tvb, proto_tree * tree, int start, guint16 len) +{ + guint8 type, length; + proto_item *dcc_item; + proto_tree *dcc_tree; + int pos; + + pos = start; + dcc_item = proto_tree_add_text ( tree, tvb, start, len, "2 DCC-REQ Downstream Params Encodings (Length = %u)", len); + dcc_tree = proto_item_add_subtree ( dcc_item , ett_docsis_dccreq_ds_params); + + while ( pos < ( start + len) ) + { + type = tvb_get_guint8 (tvb, pos++); + length = tvb_get_guint8 (tvb, pos++); + + switch (type) + { + case DCCREQ_DS_FREQ: + if (length == 4) + { + proto_tree_add_item (dcc_tree, hf_docsis_dccreq_ds_freq, tvb, + pos, length, FALSE); + } + else + { + THROW (ReportedBoundsError); + } + break; + case DCCREQ_DS_MOD_TYPE: + if (length == 1) + { + proto_tree_add_item (dcc_tree, hf_docsis_dccreq_ds_mod_type, tvb, + pos, length, FALSE); + } + else + { + THROW (ReportedBoundsError); + } + break; + case DCCREQ_DS_SYM_RATE: + if (length == 1) + { + proto_tree_add_item (dcc_tree, hf_docsis_dccreq_ds_sym_rate, tvb, + pos, length, FALSE); + } + else + { + THROW (ReportedBoundsError); + } + break; + case DCCREQ_DS_INTLV_DEPTH: + if (length == 2) + { + proto_tree_add_item (dcc_tree, hf_docsis_dccreq_ds_intlv_depth_i, tvb, + pos, 1, FALSE); + proto_tree_add_item (dcc_tree, hf_docsis_dccreq_ds_intlv_depth_j, tvb, + pos + 1, 1, FALSE); + } + else + { + THROW (ReportedBoundsError); + } + break; + case DCCREQ_DS_CHAN_ID: + if (length == 1) + { + proto_tree_add_item (dcc_tree, hf_docsis_dccreq_ds_chan_id, tvb, + pos, length, FALSE); + } + else + { + THROW (ReportedBoundsError); + } + break; + case DCCREQ_DS_SYNC_SUB: + proto_tree_add_item (dcc_tree, hf_docsis_dccreq_ds_sync_sub, tvb, + pos, length, FALSE); + break; + + } + pos = pos + length; + } +} +static void +dissect_dccreq_sf_sub (tvbuff_t * tvb, proto_tree * tree, int start, guint16 len) +{ + guint8 type, length; + proto_item *dcc_item; + proto_tree *dcc_tree; + int pos; + + pos = start; + dcc_item = proto_tree_add_text ( tree, tvb, start, len, "7 DCC-REQ Service Flow Substitution Encodings (Length = %u)", len); + dcc_tree = proto_item_add_subtree ( dcc_item , ett_docsis_dccreq_sf_sub); + + while ( pos < ( start + len) ) + { + type = tvb_get_guint8 (tvb, pos++); + length = tvb_get_guint8 (tvb, pos++); + + switch (type) + { + case DCCREQ_SF_SFID: + if (length == 8) + { + proto_tree_add_item (dcc_tree, hf_docsis_dccreq_sf_sfid_cur, tvb, + pos, 4, FALSE); + proto_tree_add_item (dcc_tree, hf_docsis_dccreq_sf_sfid_new, tvb, + pos + 4, 4, FALSE); + } + else + { + THROW (ReportedBoundsError); + } + break; + case DCCREQ_SF_SID: + if (length == 4) + { + proto_tree_add_item (dcc_tree, hf_docsis_dccreq_sf_sid_cur, tvb, + pos, 2, FALSE); + proto_tree_add_item (dcc_tree, hf_docsis_dccreq_sf_sid_new, tvb, + pos + 2, 2, FALSE); + } + else + { + THROW (ReportedBoundsError); + } + break; + case DCCREQ_SF_UNSOL_GRANT_TREF: + if (length == 4) + { + proto_tree_add_item (dcc_tree, hf_docsis_dccreq_sf_unsol_grant_tref, tvb, + pos, length, FALSE); + } + else + { + THROW (ReportedBoundsError); + } + break; + } + pos = pos + length; + } +} +static void +dissect_dccreq (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree) +{ + guint16 pos; + guint8 type, length; + proto_tree *dcc_tree; + proto_item *dcc_item; + guint16 len; + + len = tvb_length_remaining (tvb, 0); + + if (check_col (pinfo->cinfo, COL_INFO)) + { + col_clear (pinfo->cinfo, COL_INFO); + col_add_fstr (pinfo->cinfo, COL_INFO,"DCC-REQ Message: "); + } + + if (tree) + { + dcc_item = + proto_tree_add_protocol_format (tree, proto_docsis_dccreq, tvb, 0, + tvb_length_remaining (tvb, 0), + "DCC-REQ Message"); + dcc_tree = proto_item_add_subtree (dcc_item, ett_docsis_dccreq); + proto_tree_add_item (dcc_tree, hf_docsis_dccreq_tran_id, tvb, 0, 2, FALSE); + + pos = 2; + while (pos < len) + { + type = tvb_get_guint8 (tvb, pos++); + length = tvb_get_guint8 (tvb, pos++); + + switch (type) + { + case DCCREQ_UP_CHAN_ID: + if (length == 1) + { + proto_tree_add_item (dcc_tree, hf_docsis_dccreq_up_chan_id, tvb, + pos, length, FALSE); + } + else + { + THROW (ReportedBoundsError); + } + break; + case DCCREQ_DS_PARAMS: + dissect_dccreq_ds_params (tvb , dcc_tree , pos , length ); + break; + case DCCREQ_INIT_TECH: + if (length == 1) + { + proto_tree_add_item (dcc_tree, hf_docsis_dccreq_init_tech, tvb, + pos, length, FALSE); + } + else + { + THROW (ReportedBoundsError); + } + break; + case DCCREQ_UCD_SUB: + proto_tree_add_item (dcc_tree, hf_docsis_dccreq_ucd_sub, tvb, + pos, length, FALSE); + break; + case DCCREQ_SAID_SUB: + if (length == 4) + { + proto_tree_add_item (dcc_tree, hf_docsis_dccreq_said_sub_cur, tvb, + pos, 2, FALSE); + proto_tree_add_item (dcc_tree, hf_docsis_dccreq_said_sub_new, tvb, + pos + 2, 2, FALSE); + } + else + { + THROW (ReportedBoundsError); + } + break; + case DCCREQ_SF_SUB: + dissect_dccreq_sf_sub (tvb , dcc_tree , pos , length ); + break; + case DCCREQ_CMTS_MAC_ADDR: + if (length == 6) + { + proto_tree_add_item (dcc_tree, hf_docsis_dccreq_cmts_mac_addr, tvb, + pos, length, FALSE); + } + else + { + THROW (ReportedBoundsError); + } + break; + case DCCREQ_KEY_SEQ_NUM: + if (length == 1) + { + proto_tree_add_item (dcc_tree, hf_docsis_dccreq_key_seq_num, tvb, + pos, length, FALSE); + } + else + { + THROW (ReportedBoundsError); + } + break; + case DCCREQ_HMAC_DIGEST: + if (length == 20) + { + proto_tree_add_item (dcc_tree, hf_docsis_dccreq_hmac_digest, tvb, + pos, length, FALSE); + } + else + { + THROW (ReportedBoundsError); + } + break; + } /* switch(type) */ + pos = pos + length; + } /* while (pos < len) */ + } /* if (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_dccreq (void) +{ +/* Setup list of header fields See Section 1.6.1 for details*/ + static hf_register_info hf[] = { + {&hf_docsis_dccreq_tran_id , + { + "Transaction ID ", + "docsis.dccreq.tran_id", + FT_UINT16, BASE_DEC, NULL, 0x0, + "Transaction ID ", + HFILL + } + }, + {&hf_docsis_dccreq_up_chan_id , + { + "Up Channel ID ", + "docsis.dccreq.up_chan_id", + FT_UINT8, BASE_DEC, NULL, 0x0, + "Up Channel ID ", + HFILL + } + }, + {&hf_docsis_dccreq_ds_freq , + { + "Frequency ", + "docsis.dccreq.ds_freq", + FT_UINT32, BASE_DEC, NULL, 0x0, + "Frequency ", + HFILL + } + }, + {&hf_docsis_dccreq_ds_mod_type , + { + "Modulation Type ", + "docsis.dccreq.ds_mod_type", + FT_UINT8, BASE_DEC, VALS (ds_mod_type_vals), 0x0, + "Modulation Type ", + HFILL + } + }, + {&hf_docsis_dccreq_ds_sym_rate , + { + "Symbol Rate", + "docsis.dccreq.ds_sym_rate", + FT_UINT8, BASE_DEC, VALS (ds_sym_rate_vals), 0x0, + "Symbol Rate", + HFILL + } + }, + {&hf_docsis_dccreq_ds_intlv_depth_i , + { + "Interleaver Depth I Value", + "docsis.dccreq.ds_intlv_depth_i", + FT_UINT8, BASE_DEC, NULL, 0x0, + "Interleaver Depth I Value", + HFILL + } + }, + {&hf_docsis_dccreq_ds_intlv_depth_j , + { + "Interleaver Depth J Value", + "docsis.dccreq.ds_intlv_depth_j", + FT_UINT8, BASE_DEC, NULL, 0x0, + "Interleaver Depth J Value", + HFILL + } + }, + {&hf_docsis_dccreq_ds_chan_id , + { + "Downstream Channel ID", + "docsis.dccreq.ds_chan_id", + FT_UINT8, BASE_DEC, NULL, 0x0, + "Downstream Channel ID", + HFILL + } + }, + {&hf_docsis_dccreq_ds_sync_sub , + { + "SYNC Substitution", + "docsis.dccreq.ds_sync_sub", + FT_UINT8, BASE_DEC, NULL, 0x0, + "SYNC Substitution", + HFILL + } + }, + {&hf_docsis_dccreq_init_tech , + { + "Initialization Technique", + "docsis.dccreq.init_tech", + FT_UINT8, BASE_DEC, VALS (init_tech_vals), 0x0, + "Initialization Technique", + HFILL + } + }, + {&hf_docsis_dccreq_ucd_sub , + { + "UCD Substitution ", + "docsis.dccreq.ucd_sub", + FT_BYTES, BASE_HEX, NULL, 0x0, + "UCD Substitution ", + HFILL + } + }, + {&hf_docsis_dccreq_said_sub_cur , + { + "SAID Sub - Current Value", + "docsis.dccreq.said_sub_cur", + FT_UINT16, BASE_DEC, NULL, 0x0, + "SAID Sub - Current Value", + HFILL + } + }, + {&hf_docsis_dccreq_said_sub_new , + { + "SAID Sub - New Value", + "docsis.dccreq.said_sub_new", + FT_UINT16, BASE_DEC, NULL, 0x0, + "SAID Sub - New Value", + HFILL + } + }, + {&hf_docsis_dccreq_sf_sfid_cur , + { + "SF Sub - SFID Current Value", + "docsis.dccreq.sf_sfid_cur", + FT_UINT32, BASE_DEC, NULL, 0x0, + "SF Sub - SFID Current Value", + HFILL + } + }, + {&hf_docsis_dccreq_sf_sfid_new , + { + "SF Sub - SFID New Value", + "docsis.dccreq.sf_sfid_new", + FT_UINT32, BASE_DEC, NULL, 0x0, + "SF Sub - SFID New Value", + HFILL + } + }, + {&hf_docsis_dccreq_sf_sid_cur , + { + "SF Sub - SID Current Value", + "docsis.dccreq.sf_sid_cur", + FT_UINT16, BASE_DEC, NULL, 0x0, + "SF Sub - SID Current Value", + HFILL + } + }, + {&hf_docsis_dccreq_sf_sid_new , + { + "SF Sub - SID New Value", + "docsis.dccreq.sf_sid_new", + FT_UINT16, BASE_DEC, NULL, 0x0, + "SF Sub - SID New Value", + HFILL + } + }, + {&hf_docsis_dccreq_sf_unsol_grant_tref , + { + "SF Sub - Unsolicited Grant Time Reference ", + "docsis.dccreq.sf_unsol_grant_tref", + FT_UINT32, BASE_DEC, NULL, 0x0, + "SF Sub - Unsolicited Grant Time Reference ", + HFILL + } + }, + {&hf_docsis_dccreq_cmts_mac_addr , + { + "CMTS Mac Address ", + "docsis.dccreq.cmts_mac_addr", + FT_ETHER, BASE_DEC, NULL, 0x0, + "CMTS Mac Address ", + HFILL + } + }, + {&hf_docsis_dccreq_key_seq_num , + { + "Auth Key Sequence Number ", + "docsis.dccreq.key_seq_num", + FT_UINT8, BASE_DEC, NULL, 0x0, + "Auth Key Sequence Number ", + HFILL + } + }, + {&hf_docsis_dccreq_hmac_digest , + { + "HMAC-DigestNumber ", + "docsis.dccreq.hmac_digest", + FT_BYTES, BASE_DEC, NULL, 0x0, + "HMAC-DigestNumber ", + HFILL + } + }, + + }; + +/* Setup protocol subtree array */ + static gint *ett[] = { + &ett_docsis_dccreq, + &ett_docsis_dccreq_sf_sub, + &ett_docsis_dccreq_ds_params, + }; + +/* Register the protocol name and description */ + proto_docsis_dccreq = + proto_register_protocol ("DOCSIS Downstream Channel Change Request ", + "DOCSIS DCC-REQ", "docsis_dccreq"); + +/* Required function calls to register the header fields and subtrees used */ + proto_register_field_array (proto_docsis_dccreq, hf, array_length (hf)); + proto_register_subtree_array (ett, array_length (ett)); + + register_dissector ("docsis_dccreq", dissect_dccreq, proto_docsis_dccreq); +} + + +/* 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_dccreq (void) +{ + dissector_handle_t docsis_dccreq_handle; + + docsis_dccreq_handle = find_dissector ("docsis_dccreq"); + dissector_add ("docsis_mgmt", 0x17, docsis_dccreq_handle); + +} |