/* packet-macmgmt.c * Routines for docsis Mac Management Header dissection * 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 MGT_SYNC 1 #define MGT_UCD 2 #define MGT_MAP 3 #define MGT_RNG_REQ 4 #define MGT_RNG_RSP 5 #define MGT_REG_REQ 6 #define MGT_REG_RSP 7 #define MGT_UCC_REQ 8 #define MGT_UCC_RSP 9 #define MGT_TRI_TCD 10 #define MGT_TRI_TSI 11 #define MGT_BPKM_REQ 12 #define MGT_BPKM_RSP 13 #define MGT_REG_ACK 14 #define MGT_DSA_REQ 15 #define MGT_DSA_RSP 16 #define MGT_DSA_ACK 17 #define MGT_DSC_REQ 18 #define MGT_DSC_RSP 19 #define MGT_DSC_ACK 20 #define MGT_DSD_REQ 21 #define MGT_DSD_RSP 22 #define MGT_DCC_REQ 23 #define MGT_DCC_RSP 24 #define MGT_DCC_ACK 25 #define MGT_DCI_REQ 26 #define MGT_DCI_RSP 27 #define MGT_UP_DIS 28 #define MGT_TYPE29UCD 29 #define MGT_INIT_RNG_REQ 30 #define MGT_TEST_REQ 31 #define MGT_DS_CH_DESC 32 #define MGT_MDD 33 #define MGT_B_INIT_RNG_REQ 34 #define MGT_TYPE35UCD 35 #define MGT_DBC_REQ 36 #define MGT_DBC_RSP 37 #define MGT_DBC_ACK 38 #define MGT_DPV_REQ 39 #define MGT_DPV_RSP 40 #define MGT_CM_STATUS 41 #define MGT_CM_CTRL_REQ 42 #define MGT_CM_CTRL_RSP 43 #define MGT_REG_REQ_MP 44 #define MGT_REG_RSP_MP 45 /* Initialize the protocol and registered fields */ static int proto_docsis_mgmt = -1; static int hf_docsis_mgt_dst_addr = -1; static int hf_docsis_mgt_src_addr = -1; static int hf_docsis_mgt_msg_len = -1; static int hf_docsis_mgt_dsap = -1; static int hf_docsis_mgt_ssap = -1; static int hf_docsis_mgt_control = -1; static int hf_docsis_mgt_version = -1; static int hf_docsis_mgt_type = -1; static int hf_docsis_mgt_rsvd = -1; static dissector_table_t docsis_mgmt_dissector_table; static dissector_handle_t data_handle; /* Initialize the subtree pointers */ static gint ett_docsis_mgmt = -1; static gint ett_mgmt_pay = -1; static const value_string mgmt_type_vals[] = { {MGT_SYNC, "Timing Synchronisation"}, {MGT_UCD, "Upstream Channel Descriptor"}, {MGT_TYPE29UCD, "Upstream Channel Descriptor Type 29"}, {MGT_TYPE35UCD, "Upstream Channel Descriptor Type 35"}, {MGT_MAP, "Upstream Bandwidth Allocation"}, {MGT_RNG_REQ, "Ranging Request"}, {MGT_RNG_RSP, "Ranging Response"}, {MGT_REG_REQ, "Registration Request"}, {MGT_REG_RSP, "Registration Response"}, {MGT_UCC_REQ, "Upstream Channel Change Request"}, {MGT_UCC_RSP, "Upstream Channel Change Response"}, {MGT_TRI_TCD, "Telephony Channel Descriptor"}, {MGT_TRI_TSI, "Termination System Information"}, {MGT_BPKM_REQ, "Privacy Key Management Request"}, {MGT_BPKM_RSP, "Privacy Key Management Response"}, {MGT_REG_ACK, "Registration Acknowledge"}, {MGT_DSA_REQ, "Dynamic Service Addition Request"}, {MGT_DSA_RSP, "Dynamic Service Addition Response"}, {MGT_DSA_ACK, "Dynamic Service Addition Acknowledge"}, {MGT_DSC_REQ, "Dynamic Service Change Request"}, {MGT_DSC_RSP, "Dynamic Service Change Response"}, {MGT_DSC_ACK, "Dynamic Service Change Acknowledge"}, {MGT_DSD_REQ, "Dynamic Service Delete Request"}, {MGT_DSD_RSP, "Dynamic Service Delete Response"}, {MGT_DCC_REQ, "Dynamic Channel Change Request"}, {MGT_DCC_RSP, "Dynamic Channel Change Response"}, {MGT_DCC_ACK, "Dynamic Channel Change Acknowledge"}, {MGT_DCI_REQ, "Device Class Identification Request"}, {MGT_DCI_RSP, "Device Class Identification Response"}, {MGT_UP_DIS, "Upstream Channel Disable"}, {MGT_INIT_RNG_REQ, "Initial Ranging Request"}, {MGT_TEST_REQ, "Test Request Message"}, {MGT_DS_CH_DESC, "Downstream Channel Descriptor"}, {MGT_MDD, "MAC Domain Descriptor"}, {MGT_B_INIT_RNG_REQ, "Bonded Initial Ranging Request"}, {MGT_DBC_REQ, "Dynamic Bonding Change Request"}, {MGT_DBC_RSP, "Dynamic Bonding Change Response"}, {MGT_DBC_ACK, "Dynamic Bonding Change Acknowledge"}, {MGT_DPV_REQ, "DOCSIS Path Verify Request"}, {MGT_DPV_RSP, "DOCSIS Path Verify Response"}, {MGT_CM_STATUS, "CM Status Report"}, {MGT_CM_CTRL_REQ, "CM Control Request"}, {MGT_CM_CTRL_RSP, "CM Control Response"}, {MGT_REG_REQ_MP, "Multipart Registration Request"}, {MGT_REG_RSP_MP, "Multipart Registration Response"}, {0, NULL} }; /* Code to actually dissect the packets */ static void dissect_macmgmt (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree) { const guint8 *src, *dst; guint16 msg_len; proto_item *mgt_hdr_it; proto_tree *mgt_hdr_tree; tvbuff_t *payload_tvb; guint8 type; col_set_str (pinfo->cinfo, COL_PROTOCOL, "DOCSIS MGMT"); col_clear(pinfo->cinfo, COL_INFO); src = tvb_get_ptr (tvb, 6, 6); dst = tvb_get_ptr (tvb, 0, 6); SET_ADDRESS (&pinfo->dl_src, AT_ETHER, 6, src); SET_ADDRESS (&pinfo->src, AT_ETHER, 6, src); SET_ADDRESS (&pinfo->dl_dst, AT_ETHER, 6, dst); SET_ADDRESS (&pinfo->dst, AT_ETHER, 6, dst); if (tree) { mgt_hdr_it = proto_tree_add_protocol_format (tree, proto_docsis_mgmt, tvb, 0, 20, "Mac Management"); mgt_hdr_tree = proto_item_add_subtree (mgt_hdr_it, ett_docsis_mgmt); proto_tree_add_item (mgt_hdr_tree, hf_docsis_mgt_dst_addr, tvb, 0, 6, ENC_NA); proto_tree_add_item (mgt_hdr_tree, hf_docsis_mgt_src_addr, tvb, 6, 6, ENC_NA); proto_tree_add_item (mgt_hdr_tree, hf_docsis_mgt_msg_len, tvb, 12, 2, ENC_BIG_ENDIAN); proto_tree_add_item (mgt_hdr_tree, hf_docsis_mgt_dsap, tvb, 14, 1, ENC_BIG_ENDIAN); proto_tree_add_item (mgt_hdr_tree, hf_docsis_mgt_ssap, tvb, 15, 1, ENC_BIG_ENDIAN); proto_tree_add_item (mgt_hdr_tree, hf_docsis_mgt_control, tvb, 16, 1, ENC_BIG_ENDIAN); proto_tree_add_item (mgt_hdr_tree, hf_docsis_mgt_version, tvb, 17, 1, ENC_BIG_ENDIAN); proto_tree_add_item (mgt_hdr_tree, hf_docsis_mgt_type, tvb, 18, 1, ENC_BIG_ENDIAN); proto_tree_add_item (mgt_hdr_tree, hf_docsis_mgt_rsvd, tvb, 19, 1, ENC_BIG_ENDIAN); } /* Code to Call subdissector */ /* sub-dissectors are based on the type field */ type = tvb_get_guint8 (tvb, 18); msg_len = tvb_get_ntohs (tvb, 12); payload_tvb = tvb_new_subset (tvb, 20, msg_len - 6, msg_len - 6); if (dissector_try_uint (docsis_mgmt_dissector_table, type, payload_tvb, pinfo, tree)) return; else call_dissector (data_handle, payload_tvb, pinfo, 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_mgmt (void) { /* Setup list of header fields See Section 1.6.1 for details*/ static hf_register_info hf[] = { {&hf_docsis_mgt_dst_addr, {"Destination Address", "docsis_mgmt.dst", FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL} }, {&hf_docsis_mgt_src_addr, {"Source Address", "docsis_mgmt.src", FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL} }, {&hf_docsis_mgt_msg_len, {"Message Length - DSAP to End (Bytes)", "docsis_mgmt.msglen", FT_UINT16, BASE_DEC, NULL, 0x0, "Message Length", HFILL} }, {&hf_docsis_mgt_dsap, {"DSAP [0x00]", "docsis_mgmt.dsap", FT_UINT8, BASE_HEX, NULL, 0x0, "Destination SAP", HFILL} }, {&hf_docsis_mgt_ssap, {"SSAP [0x00]", "docsis_mgmt.ssap", FT_UINT8, BASE_HEX, NULL, 0x0, "Source SAP", HFILL} }, {&hf_docsis_mgt_control, {"Control [0x03]", "docsis_mgmt.control", FT_UINT8, BASE_HEX, NULL, 0x0, "Control", HFILL} }, {&hf_docsis_mgt_version, {"Version", "docsis_mgmt.version", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL} }, {&hf_docsis_mgt_type, {"Type", "docsis_mgmt.type", FT_UINT8, BASE_DEC, VALS (mgmt_type_vals), 0x0, NULL, HFILL} }, {&hf_docsis_mgt_rsvd, {"Reserved [0x00]", "docsis_mgmt.rsvd", FT_UINT8, BASE_DEC, NULL, 0x0, "Reserved", HFILL} }, }; /* Setup protocol subtree array */ static gint *ett[] = { &ett_docsis_mgmt, &ett_mgmt_pay, }; docsis_mgmt_dissector_table = register_dissector_table ("docsis_mgmt", "DOCSIS Mac Management", FT_UINT8, BASE_DEC); /* Register the protocol name and description */ proto_docsis_mgmt = proto_register_protocol ("DOCSIS Mac Management", "DOCSIS MAC MGMT", "docsis_mgmt"); /* Required function calls to register the header fields and subtrees used */ proto_register_field_array (proto_docsis_mgmt, hf, array_length (hf)); proto_register_subtree_array (ett, array_length (ett)); register_dissector ("docsis_mgmt", dissect_macmgmt, proto_docsis_mgmt); } /* 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_mgmt (void) { #if 0 dissector_handle_t docsis_mgmt_handle; docsis_mgmt_handle = find_dissector ("docsis_mgmt"); dissector_add_uint ("docsis", 0x03, docsis_mgmt_handle); #endif data_handle = find_dissector ("data"); }