/* packet-dvb-data-mpe.c * Routines for DVB-DATA (ETSI EN 301 192) MultiProtocol Encapsulation * Copyright 2012, Guy Martin * * 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., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "config.h" #include #include #include "packet-mpeg-sect.h" void proto_register_dvb_data_mpe(void); void proto_reg_handoff_dvb_data_mpe(void); static int proto_dvb_data_mpe = -1; static int hf_dvb_data_mpe_reserved = -1; static int hf_dvb_data_mpe_payload_scrambling_control = -1; static int hf_dvb_data_mpe_address_scrambling_control = -1; static int hf_dvb_data_mpe_llc_snap_flag = -1; static int hf_dvb_data_mpe_current_next_indicator = -1; static int hf_dvb_data_mpe_section_number = -1; static int hf_dvb_data_mpe_last_section_number = -1; static int hf_dvb_data_mpe_dst_mac = -1; static gint ett_dvb_data_mpe = -1; static dissector_handle_t ip_handle; static dissector_handle_t llc_handle; #define DVB_DATA_MPE_RESERVED_MASK 0xC0 #define DVB_DATA_MPE_PAYLOAD_SCRAMBLING_MASK 0x30 #define DVB_DATA_MPE_ADDRESS_SCRAMBLING_MASK 0x0C #define DVB_DATA_MPE_LLC_SNAP_FLAG_MASK 0x02 #define DVB_DATA_MPE_CURRENT_NEXT_INDICATOR_MASK 0x01 static const value_string dvb_rcs_cur_next_vals[] = { { 0x0, "Not yet applicable" }, { 0x1, "Currently applicable" }, { 0, NULL }, }; static int dissect_dvb_data_mpe(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { guint offset = 0, tot_len = 0; guint8 llc_snap_flag; int i; proto_item *ti; proto_tree *dvb_data_mpe_tree; tvbuff_t *mac_tvb; tvbuff_t *mac_bytes_tvb[6]; tvbuff_t *data_tvb; /* The TVB should start right after the section_length in the Section packet */ col_set_str(pinfo->cinfo, COL_PROTOCOL, "DVB-DATA"); col_set_str(pinfo->cinfo, COL_INFO, "MultiProtocol Encapsulation"); ti = proto_tree_add_item(tree, proto_dvb_data_mpe, tvb, offset, -1, ENC_NA); dvb_data_mpe_tree = proto_item_add_subtree(ti, ett_dvb_data_mpe); offset += packet_mpeg_sect_header(tvb, offset, dvb_data_mpe_tree, &tot_len, NULL); /* Parse the DMC-CC private section header */ mac_bytes_tvb[5] = tvb_new_subset_length(tvb, offset, 1); offset += 1; mac_bytes_tvb[4] = tvb_new_subset_length(tvb, offset, 1); offset += 1; proto_tree_add_item(dvb_data_mpe_tree, hf_dvb_data_mpe_reserved, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(dvb_data_mpe_tree, hf_dvb_data_mpe_payload_scrambling_control, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(dvb_data_mpe_tree, hf_dvb_data_mpe_address_scrambling_control, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(dvb_data_mpe_tree, hf_dvb_data_mpe_llc_snap_flag, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(dvb_data_mpe_tree, hf_dvb_data_mpe_current_next_indicator, tvb, offset, 1, ENC_BIG_ENDIAN); llc_snap_flag = tvb_get_guint8(tvb, offset) & DVB_DATA_MPE_LLC_SNAP_FLAG_MASK; offset += 1; proto_tree_add_item(dvb_data_mpe_tree, hf_dvb_data_mpe_section_number, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; proto_tree_add_item(dvb_data_mpe_tree, hf_dvb_data_mpe_last_section_number, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; for (i = 3; i >= 0; i--) { mac_bytes_tvb[i] = tvb_new_subset_length(tvb, offset, 1); offset += 1; } mac_tvb = tvb_new_composite(); for (i = 0; i < 6; i++) tvb_composite_append(mac_tvb, mac_bytes_tvb[i]); tvb_composite_finalize(mac_tvb); proto_tree_add_item(dvb_data_mpe_tree, hf_dvb_data_mpe_dst_mac, mac_tvb, 0 , 6, ENC_NA); col_add_str(pinfo->cinfo, COL_RES_DL_DST, tvb_ether_to_str(mac_tvb, 0)); data_tvb = tvb_new_subset_remaining(tvb, offset); if (llc_snap_flag) { call_dissector(llc_handle, data_tvb, pinfo, tree); } else { call_dissector(ip_handle, data_tvb, pinfo, tree); } packet_mpeg_sect_crc(tvb, pinfo, dvb_data_mpe_tree, 0, tot_len - 1); return tvb_captured_length(tvb); } void proto_register_dvb_data_mpe(void) { static hf_register_info hf[] = { /* DSM-CC common fields */ { &hf_dvb_data_mpe_reserved, { "Reserved", "dvb_data_mpe.reserved", FT_UINT8, BASE_HEX, NULL, DVB_DATA_MPE_RESERVED_MASK, NULL, HFILL } }, { &hf_dvb_data_mpe_payload_scrambling_control, { "Payload Scrambling Control", "dvb_data_mpe.pload_scrambling", FT_UINT8, BASE_HEX, NULL, DVB_DATA_MPE_PAYLOAD_SCRAMBLING_MASK, NULL, HFILL } }, { &hf_dvb_data_mpe_address_scrambling_control, { "Address Scrambling Control", "dvb_data_mpe.addr_scrambling", FT_UINT8, BASE_HEX, NULL, DVB_DATA_MPE_ADDRESS_SCRAMBLING_MASK, NULL, HFILL } }, { &hf_dvb_data_mpe_llc_snap_flag, { "LLC SNAP Flag", "dvb_data_mpe.llc_snap_flag", FT_UINT8, BASE_HEX, NULL, DVB_DATA_MPE_LLC_SNAP_FLAG_MASK, NULL, HFILL } }, { &hf_dvb_data_mpe_current_next_indicator, { "Current/Next Indicator", "mpeg_sect.cur_next_ind", FT_UINT8, BASE_HEX, VALS(dvb_rcs_cur_next_vals), DVB_DATA_MPE_CURRENT_NEXT_INDICATOR_MASK, NULL, HFILL } }, { &hf_dvb_data_mpe_section_number, { "Section Number", "dvb_data_mpe.sect_num", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL } }, { &hf_dvb_data_mpe_last_section_number, { "Last Section Number", "dvb_data_mpe.last_sect_num", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL } }, { &hf_dvb_data_mpe_dst_mac, { "Destination MAC address", "dvb_data_mpe.dst_mac", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL } }, }; static gint *ett[] = { &ett_dvb_data_mpe, }; proto_dvb_data_mpe = proto_register_protocol("DVB-DATA MultiProtocol Encapsulation", "DVB-DATA MPE", "dvb_data_mpe"); proto_register_field_array(proto_dvb_data_mpe, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); } void proto_reg_handoff_dvb_data_mpe(void) { dissector_handle_t dvb_data_mpe_handle; dvb_data_mpe_handle = create_dissector_handle(dissect_dvb_data_mpe, proto_dvb_data_mpe); dissector_add_uint("mpeg_sect.tid", DVB_DATA_MPE_TID, dvb_data_mpe_handle); ip_handle = find_dissector_add_dependency("ip", proto_dvb_data_mpe); llc_handle = find_dissector_add_dependency("llc", proto_dvb_data_mpe); } /* * Editor modelines - http://www.wireshark.org/tools/modelines.html * * Local variables: * c-basic-offset: 4 * tab-width: 8 * indent-tabs-mode: nil * End: * * vi: set shiftwidth=4 tabstop=8 expandtab: * :indentSize=4:tabSize=8:noTabs=true: */